mirror of
https://github.com/mpv-player/mpv
synced 2024-12-25 08:12:17 +00:00
27d5d32020
As requested. I guess option name and manpage text could be better and clearer. Closes: #7442
4515 lines
150 KiB
C
4515 lines
150 KiB
C
/*
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* This file is part of mpv.
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*
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* mpv is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* mpv is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#include <unistd.h>
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#include <limits.h>
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#include <pthread.h>
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#include <stdint.h>
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#include <math.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include "cache.h"
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#include "config.h"
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#include "options/m_config.h"
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#include "options/m_option.h"
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#include "mpv_talloc.h"
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#include "common/av_common.h"
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#include "common/msg.h"
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#include "common/global.h"
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#include "common/recorder.h"
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#include "misc/charset_conv.h"
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#include "misc/thread_tools.h"
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#include "osdep/atomic.h"
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#include "osdep/timer.h"
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#include "osdep/threads.h"
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#include "stream/stream.h"
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#include "demux.h"
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#include "timeline.h"
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#include "stheader.h"
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#include "cue.h"
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// Demuxer list
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extern const struct demuxer_desc demuxer_desc_edl;
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extern const struct demuxer_desc demuxer_desc_cue;
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extern const demuxer_desc_t demuxer_desc_rawaudio;
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extern const demuxer_desc_t demuxer_desc_rawvideo;
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extern const demuxer_desc_t demuxer_desc_mf;
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extern const demuxer_desc_t demuxer_desc_matroska;
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extern const demuxer_desc_t demuxer_desc_lavf;
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extern const demuxer_desc_t demuxer_desc_playlist;
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extern const demuxer_desc_t demuxer_desc_disc;
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extern const demuxer_desc_t demuxer_desc_rar;
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extern const demuxer_desc_t demuxer_desc_libarchive;
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extern const demuxer_desc_t demuxer_desc_null;
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extern const demuxer_desc_t demuxer_desc_timeline;
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static const demuxer_desc_t *const demuxer_list[] = {
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&demuxer_desc_disc,
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&demuxer_desc_edl,
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&demuxer_desc_cue,
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&demuxer_desc_rawaudio,
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&demuxer_desc_rawvideo,
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&demuxer_desc_matroska,
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#if HAVE_LIBARCHIVE
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&demuxer_desc_libarchive,
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#endif
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&demuxer_desc_lavf,
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&demuxer_desc_mf,
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&demuxer_desc_playlist,
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&demuxer_desc_null,
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NULL
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};
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struct demux_opts {
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int enable_cache;
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int disk_cache;
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int64_t max_bytes;
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int64_t max_bytes_bw;
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int donate_fw;
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double min_secs;
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int force_seekable;
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double min_secs_cache;
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int access_references;
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int seekable_cache;
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int create_ccs;
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char *record_file;
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int video_back_preroll;
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int audio_back_preroll;
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int back_batch[STREAM_TYPE_COUNT];
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double back_seek_size;
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char *meta_cp;
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};
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#define OPT_BASE_STRUCT struct demux_opts
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#define MAX_BYTES MPMIN(INT64_MAX, SIZE_MAX / 2)
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static bool get_demux_sub_opts(int index, const struct m_sub_options **sub);
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const struct m_sub_options demux_conf = {
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.opts = (const struct m_option[]){
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OPT_CHOICE("cache", enable_cache, 0,
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({"no", 0}, {"auto", -1}, {"yes", 1})),
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OPT_FLAG("cache-on-disk", disk_cache, 0),
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OPT_DOUBLE("demuxer-readahead-secs", min_secs, M_OPT_MIN, .min = 0),
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// (The MAX_BYTES sizes may not be accurate because the max field is
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// of double type.)
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OPT_BYTE_SIZE("demuxer-max-bytes", max_bytes, 0, 0, MAX_BYTES),
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OPT_BYTE_SIZE("demuxer-max-back-bytes", max_bytes_bw, 0, 0, MAX_BYTES),
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OPT_FLAG("demuxer-donate-buffer", donate_fw, 0),
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OPT_FLAG("force-seekable", force_seekable, 0),
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OPT_DOUBLE("cache-secs", min_secs_cache, M_OPT_MIN, .min = 0),
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OPT_FLAG("access-references", access_references, 0),
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OPT_CHOICE("demuxer-seekable-cache", seekable_cache, 0,
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({"auto", -1}, {"no", 0}, {"yes", 1})),
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OPT_FLAG("sub-create-cc-track", create_ccs, 0),
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OPT_STRING("stream-record", record_file, 0),
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OPT_CHOICE_OR_INT("video-backward-overlap", video_back_preroll, 0, 0,
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1024, ({"auto", -1})),
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OPT_CHOICE_OR_INT("audio-backward-overlap", audio_back_preroll, 0, 0,
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1024, ({"auto", -1})),
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OPT_INTRANGE("video-backward-batch", back_batch[STREAM_VIDEO], 0, 0, 1024),
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OPT_INTRANGE("audio-backward-batch", back_batch[STREAM_AUDIO], 0, 0, 1024),
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OPT_DOUBLE("demuxer-backward-playback-step", back_seek_size, M_OPT_MIN,
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.min = 0),
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OPT_STRING("metadata-codepage", meta_cp, 0),
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{0}
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},
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.size = sizeof(struct demux_opts),
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.defaults = &(const struct demux_opts){
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.enable_cache = -1, // auto
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.max_bytes = 150 * 1024 * 1024,
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.max_bytes_bw = 50 * 1024 * 1024,
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.donate_fw = 1,
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.min_secs = 1.0,
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.min_secs_cache = 10.0 * 60 * 60,
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.seekable_cache = -1,
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.access_references = 1,
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.video_back_preroll = -1,
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.audio_back_preroll = -1,
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.back_seek_size = 60,
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.back_batch = {
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[STREAM_VIDEO] = 1,
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[STREAM_AUDIO] = 10,
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},
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.meta_cp = "utf-8",
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},
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.get_sub_options = get_demux_sub_opts,
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};
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struct demux_internal {
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struct mp_log *log;
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struct mpv_global *global;
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bool can_cache; // not a slave demuxer; caching makes sense
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bool can_record; // stream recording is allowed
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// The demuxer runs potentially in another thread, so we keep two demuxer
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// structs; the real demuxer can access the shadow struct only.
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struct demuxer *d_thread; // accessed by demuxer impl. (producer)
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struct demuxer *d_user; // accessed by player (consumer)
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// The lock protects the packet queues (struct demux_stream),
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// and the fields below.
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pthread_mutex_t lock;
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pthread_cond_t wakeup;
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pthread_t thread;
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// -- All the following fields are protected by lock.
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struct demux_opts *opts;
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struct m_config_cache *opts_cache;
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bool thread_terminate;
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bool threading;
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bool shutdown_async;
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void (*wakeup_cb)(void *ctx);
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void *wakeup_cb_ctx;
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struct sh_stream **streams;
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int num_streams;
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char *meta_charset;
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// If non-NULL, a stream which is used for global (timed) metadata. It will
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// be an arbitrary stream, which hopefully will happen to work.
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struct sh_stream *metadata_stream;
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int events;
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struct demux_cache *cache;
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bool warned_queue_overflow;
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bool last_eof; // last actual global EOF status
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bool eof; // whether we're in EOF state (reset for retry)
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bool idle;
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double min_secs;
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size_t max_bytes;
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size_t max_bytes_bw;
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bool seekable_cache;
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bool using_network_cache_opts;
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char *record_filename;
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// At least one decoder actually requested data since init or the last seek.
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// Do this to allow the decoder thread to select streams before starting.
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bool reading;
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// Set if we just performed a seek, without reading packets yet. Used to
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// avoid a redundant initial seek after enabling streams. We could just
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// allow it, but to avoid buggy seeking affecting normal playback, we don't.
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bool after_seek;
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// Set in addition to after_seek if we think we seeked to the start of the
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// file (or if the demuxer was just opened).
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bool after_seek_to_start;
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// Demuxing backwards. Since demuxer implementations don't support this
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// directly, it is emulated by seeking backwards for every packet run. Also,
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// packets between keyframes are demuxed forwards (you can't decode that
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// stuff otherwise), which adds complexity on top of it.
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bool back_demuxing;
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// For backward demuxing:
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bool need_back_seek; // back-step seek needs to be triggered
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bool back_any_need_recheck; // at least 1 ds->back_need_recheck set
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bool tracks_switched; // thread needs to inform demuxer of this
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bool seeking; // there's a seek queued
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int seek_flags; // flags for next seek (if seeking==true)
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double seek_pts;
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// (fields for debugging)
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double seeking_in_progress; // low level seek state
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int low_level_seeks; // number of started low level seeks
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double demux_ts; // last demuxed DTS or PTS
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double ts_offset; // timestamp offset to apply to everything
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// (sorted by least recent use: index 0 is least recently used)
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struct demux_cached_range **ranges;
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int num_ranges;
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size_t total_bytes; // total sum of packet data buffered
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// Range from which decoder is reading, and to which demuxer is appending.
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// This is normally never NULL. This is always ranges[num_ranges - 1].
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// This is can be NULL during initialization or deinitialization.
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struct demux_cached_range *current_range;
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double highest_av_pts; // highest non-subtitle PTS seen - for duration
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bool blocked;
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// Transient state.
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double duration;
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// Cached state.
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int64_t stream_size;
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int64_t last_speed_query;
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uint64_t bytes_per_second;
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int64_t next_cache_update;
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// demux user state (user thread, somewhat similar to reader/decoder state)
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double last_playback_pts; // last playback_pts from demux_update()
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bool force_metadata_update;
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int cached_metadata_index; // speed up repeated lookups
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struct mp_recorder *dumper;
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int dumper_status;
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bool owns_stream;
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// -- Access from demuxer thread only
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bool enable_recording;
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struct mp_recorder *recorder;
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int64_t slave_unbuffered_read_bytes; // value repoted from demuxer impl.
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int64_t hack_unbuffered_read_bytes; // for demux_get_bytes_read_hack()
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int64_t cache_unbuffered_read_bytes; // for demux_reader_state.bytes_per_second
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int64_t byte_level_seeks; // for demux_reader_state.byte_level_seeks
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};
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struct timed_metadata {
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double pts;
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struct mp_tags *tags;
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bool from_stream;
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};
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// A continuous range of cached packets for all enabled streams.
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// (One demux_queue for each known stream.)
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struct demux_cached_range {
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// streams[] is indexed by demux_stream->index
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struct demux_queue **streams;
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int num_streams;
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// Computed from the stream queue's values. These fields (unlike as with
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// demux_queue) are always either NOPTS, or fully valid.
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double seek_start, seek_end;
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bool is_bof; // set if the file begins with this range
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bool is_eof; // set if the file ends with this range
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struct timed_metadata **metadata;
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int num_metadata;
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};
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#define QUEUE_INDEX_SIZE_MASK(queue) ((queue)->index_size - 1)
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// Access the idx-th entry in the given demux_queue.
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// Requirement: idx >= 0 && idx < queue->num_index
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#define QUEUE_INDEX_ENTRY(queue, idx) \
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((queue)->index[((queue)->index0 + (idx)) & QUEUE_INDEX_SIZE_MASK(queue)])
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// Don't index packets whose timestamps that are within the last index entry by
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// this amount of time (it's better to seek them manually).
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#define INDEX_STEP_SIZE 1.0
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struct index_entry {
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double pts;
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struct demux_packet *pkt;
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};
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// A continuous list of cached packets for a single stream/range. There is one
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// for each stream and range. Also contains some state for use during demuxing
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// (keeping it across seeks makes it easier to resume demuxing).
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struct demux_queue {
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struct demux_stream *ds;
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struct demux_cached_range *range;
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struct demux_packet *head;
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struct demux_packet *tail;
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uint64_t tail_cum_pos; // cumulative size including tail packet
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bool correct_dts; // packet DTS is strictly monotonically increasing
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bool correct_pos; // packet pos is strictly monotonically increasing
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int64_t last_pos; // for determining correct_pos
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int64_t last_pos_fixup; // for filling in unset dp->pos values
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double last_dts; // for determining correct_dts
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double last_ts; // timestamp of the last packet added to queue
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// for incrementally determining seek PTS range
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struct demux_packet *keyframe_latest;
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struct demux_packet *keyframe_first; // cached value of first KF packet
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// incrementally maintained seek range, possibly invalid
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double seek_start, seek_end;
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double last_pruned; // timestamp of last pruned keyframe
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bool is_bof; // started demuxing at beginning of file
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bool is_eof; // received true EOF here
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// Complete index, though it may skip some entries to reduce density.
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struct index_entry *index; // ring buffer
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size_t index_size; // size of index[] (0 or a power of 2)
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size_t index0; // first index entry
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size_t num_index; // number of index entries (wraps on index_size)
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};
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struct demux_stream {
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struct demux_internal *in;
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struct sh_stream *sh; // ds->sh->ds == ds
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enum stream_type type; // equals to sh->type
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int index; // equals to sh->index
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// --- all fields are protected by in->lock
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void (*wakeup_cb)(void *ctx);
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void *wakeup_cb_ctx;
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// demuxer state
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bool selected; // user wants packets from this stream
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bool eager; // try to keep at least 1 packet queued
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// if false, this stream is disabled, or passively
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// read (like subtitles)
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bool still_image; // stream has still video images
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bool refreshing; // finding old position after track switches
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bool eof; // end of demuxed stream? (true if no more packets)
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bool global_correct_dts;// all observed so far
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bool global_correct_pos;
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// current queue - used both for reading and demuxing (this is never NULL)
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struct demux_queue *queue;
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// reader (decoder) state (bitrate calculations are part of it because we
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// want to return the bitrate closest to the "current position")
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double base_ts; // timestamp of the last packet returned to decoder
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double last_br_ts; // timestamp of last packet bitrate was calculated
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size_t last_br_bytes; // summed packet sizes since last bitrate calculation
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double bitrate;
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struct demux_packet *reader_head; // points at current decoder position
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bool skip_to_keyframe;
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bool attached_picture_added;
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bool need_wakeup; // call wakeup_cb on next reader_head state change
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// For demux_internal.dumper. Currently, this is used only temporarily
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// during blocking dumping.
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struct demux_packet *dump_pos;
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// for refresh seeks: pos/dts of last packet returned to reader
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int64_t last_ret_pos;
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double last_ret_dts;
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// Backwards demuxing.
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bool back_need_recheck; // flag for incremental find_backward_restart_pos work
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// pos/dts of the previous keyframe packet returned; always valid if back-
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// demuxing is enabled, and back_restart_eof/back_restart_next are false.
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int64_t back_restart_pos;
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double back_restart_dts;
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bool back_restart_eof; // restart position is at EOF; overrides pos/dts
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bool back_restart_next; // restart before next keyframe; overrides above
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bool back_restarting; // searching keyframe before restart pos
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// Current PTS lower bound for back demuxing.
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double back_seek_pos;
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// pos/dts of the packet to resume demuxing from when another stream caused
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// a seek backward to get more packets. reader_head will be reset to this
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// packet as soon as it's encountered again.
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int64_t back_resume_pos;
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double back_resume_dts;
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bool back_resuming; // resuming mode (above fields are valid/used)
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// Set to true if the first packet (keyframe) of a range was returned.
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bool back_range_started;
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// Number of KF packets at start of range yet to return. -1 is used for BOF.
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int back_range_count;
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// Number of KF packets yet to return that are marked as preroll.
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int back_range_preroll;
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// Static packet preroll count.
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int back_preroll;
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// for closed captions (demuxer_feed_caption)
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struct sh_stream *cc;
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bool ignore_eof; // ignore stream in underrun detection
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};
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static void switch_to_fresh_cache_range(struct demux_internal *in);
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static void demuxer_sort_chapters(demuxer_t *demuxer);
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static void *demux_thread(void *pctx);
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static void update_cache(struct demux_internal *in);
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static void add_packet_locked(struct sh_stream *stream, demux_packet_t *dp);
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static struct demux_packet *advance_reader_head(struct demux_stream *ds);
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static bool queue_seek(struct demux_internal *in, double seek_pts, int flags,
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bool clear_back_state);
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static struct demux_packet *compute_keyframe_times(struct demux_packet *pkt,
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double *out_kf_min,
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double *out_kf_max);
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static void find_backward_restart_pos(struct demux_stream *ds);
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static struct demux_packet *find_seek_target(struct demux_queue *queue,
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double pts, int flags);
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static void prune_old_packets(struct demux_internal *in);
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static void dumper_close(struct demux_internal *in);
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static void demux_convert_tags_charset(struct demuxer *demuxer);
|
|
|
|
static uint64_t get_foward_buffered_bytes(struct demux_stream *ds)
|
|
{
|
|
if (!ds->reader_head)
|
|
return 0;
|
|
return ds->queue->tail_cum_pos - ds->reader_head->cum_pos;
|
|
}
|
|
|
|
#if 0
|
|
// very expensive check for redundant cached queue state
|
|
static void check_queue_consistency(struct demux_internal *in)
|
|
{
|
|
uint64_t total_bytes = 0;
|
|
|
|
assert(in->current_range && in->num_ranges > 0);
|
|
assert(in->current_range == in->ranges[in->num_ranges - 1]);
|
|
|
|
for (int n = 0; n < in->num_ranges; n++) {
|
|
struct demux_cached_range *range = in->ranges[n];
|
|
int range_num_packets = 0;
|
|
|
|
assert(range->num_streams == in->num_streams);
|
|
|
|
for (int i = 0; i < range->num_streams; i++) {
|
|
struct demux_queue *queue = range->streams[i];
|
|
|
|
assert(queue->range == range);
|
|
|
|
size_t fw_bytes = 0;
|
|
bool is_forward = false;
|
|
bool kf_found = false;
|
|
bool kf1_found = false;
|
|
size_t next_index = 0;
|
|
uint64_t queue_total_bytes = 0;
|
|
for (struct demux_packet *dp = queue->head; dp; dp = dp->next) {
|
|
is_forward |= dp == queue->ds->reader_head;
|
|
kf_found |= dp == queue->keyframe_latest;
|
|
kf1_found |= dp == queue->keyframe_first;
|
|
|
|
size_t bytes = demux_packet_estimate_total_size(dp);
|
|
total_bytes += bytes;
|
|
queue_total_bytes += bytes;
|
|
if (is_forward) {
|
|
fw_bytes += bytes;
|
|
assert(range == in->current_range);
|
|
assert(queue->ds->queue == queue);
|
|
}
|
|
range_num_packets += 1;
|
|
|
|
if (!dp->next)
|
|
assert(queue->tail == dp);
|
|
|
|
if (next_index < queue->num_index &&
|
|
QUEUE_INDEX_ENTRY(queue, next_index).pkt == dp)
|
|
next_index += 1;
|
|
}
|
|
if (!queue->head)
|
|
assert(!queue->tail);
|
|
assert(next_index == queue->num_index);
|
|
|
|
uint64_t queue_total_bytes2 = 0;
|
|
if (queue->head)
|
|
queue_total_bytes2 = queue->tail_cum_pos - queue->head->cum_pos;
|
|
|
|
assert(queue_total_bytes == queue_total_bytes2);
|
|
|
|
// If the queue is currently used...
|
|
if (queue->ds->queue == queue) {
|
|
// ...reader_head and others must be in the queue.
|
|
assert(is_forward == !!queue->ds->reader_head);
|
|
assert(kf_found == !!queue->keyframe_latest);
|
|
uint64_t fw_bytes2 = get_foward_buffered_bytes(queue->ds);
|
|
assert(fw_bytes == fw_bytes2);
|
|
}
|
|
|
|
assert(kf1_found == !!queue->keyframe_first);
|
|
|
|
if (range != in->current_range) {
|
|
assert(fw_bytes == 0);
|
|
}
|
|
|
|
if (queue->keyframe_latest)
|
|
assert(queue->keyframe_latest->keyframe);
|
|
|
|
total_bytes += queue->index_size * sizeof(struct index_entry);
|
|
}
|
|
|
|
// Invariant needed by pruning; violation has worse effects than just
|
|
// e.g. broken seeking due to incorrect seek ranges.
|
|
if (range->seek_start != MP_NOPTS_VALUE)
|
|
assert(range_num_packets > 0);
|
|
}
|
|
|
|
assert(in->total_bytes == total_bytes);
|
|
}
|
|
#endif
|
|
|
|
// (this doesn't do most required things for a switch, like updating ds->queue)
|
|
static void set_current_range(struct demux_internal *in,
|
|
struct demux_cached_range *range)
|
|
{
|
|
in->current_range = range;
|
|
|
|
// Move to in->ranges[in->num_ranges-1] (for LRU sorting/invariant)
|
|
for (int n = 0; n < in->num_ranges; n++) {
|
|
if (in->ranges[n] == range) {
|
|
MP_TARRAY_REMOVE_AT(in->ranges, in->num_ranges, n);
|
|
break;
|
|
}
|
|
}
|
|
MP_TARRAY_APPEND(in, in->ranges, in->num_ranges, range);
|
|
}
|
|
|
|
static void prune_metadata(struct demux_cached_range *range)
|
|
{
|
|
int first_needed = 0;
|
|
|
|
if (range->seek_start == MP_NOPTS_VALUE) {
|
|
first_needed = range->num_metadata;
|
|
} else {
|
|
for (int n = 0; n < range->num_metadata ; n++) {
|
|
if (range->metadata[n]->pts > range->seek_start)
|
|
break;
|
|
first_needed = n;
|
|
}
|
|
}
|
|
|
|
// Always preserve the last entry.
|
|
first_needed = MPMIN(first_needed, range->num_metadata - 1);
|
|
|
|
// (Could make this significantly more efficient for large first_needed,
|
|
// however that might be very rare and even then it might not matter.)
|
|
for (int n = 0; n < first_needed; n++) {
|
|
talloc_free(range->metadata[0]);
|
|
MP_TARRAY_REMOVE_AT(range->metadata, range->num_metadata, 0);
|
|
}
|
|
}
|
|
|
|
// Refresh range->seek_start/end. Idempotent.
|
|
static void update_seek_ranges(struct demux_cached_range *range)
|
|
{
|
|
range->seek_start = range->seek_end = MP_NOPTS_VALUE;
|
|
range->is_bof = true;
|
|
range->is_eof = true;
|
|
|
|
double min_start_pts = MP_NOPTS_VALUE;
|
|
double max_end_pts = MP_NOPTS_VALUE;
|
|
|
|
for (int n = 0; n < range->num_streams; n++) {
|
|
struct demux_queue *queue = range->streams[n];
|
|
|
|
if (queue->ds->selected && queue->ds->eager) {
|
|
if (queue->is_bof) {
|
|
min_start_pts = MP_PTS_MIN(min_start_pts, queue->seek_start);
|
|
} else {
|
|
range->seek_start =
|
|
MP_PTS_MAX(range->seek_start, queue->seek_start);
|
|
}
|
|
|
|
if (queue->is_eof) {
|
|
max_end_pts = MP_PTS_MAX(max_end_pts, queue->seek_end);
|
|
} else {
|
|
range->seek_end = MP_PTS_MIN(range->seek_end, queue->seek_end);
|
|
}
|
|
|
|
range->is_eof &= queue->is_eof;
|
|
range->is_bof &= queue->is_bof;
|
|
|
|
bool empty = queue->is_eof && !queue->head;
|
|
if (queue->seek_start >= queue->seek_end && !empty)
|
|
goto broken;
|
|
}
|
|
}
|
|
|
|
if (range->is_eof)
|
|
range->seek_end = max_end_pts;
|
|
if (range->is_bof)
|
|
range->seek_start = min_start_pts;
|
|
|
|
// Sparse (subtitle) stream behavior is not very clearly defined, but
|
|
// usually we don't want it to restrict the range of other streams. For
|
|
// example, if there are subtitle packets at position 5 and 10 seconds, and
|
|
// the demuxer demuxed the other streams until position 7 seconds, the seek
|
|
// range end position is 7.
|
|
// Assume that reading a non-sparse (audio/video) packet gets all sparse
|
|
// packets that are needed before that non-sparse packet.
|
|
// This is incorrect in any of these cases:
|
|
// - sparse streams only (it's unknown how to determine an accurate range)
|
|
// - if sparse streams have non-keyframe packets (we set queue->last_pruned
|
|
// to the start of the pruned keyframe range - we'd need the end or so)
|
|
// We also assume that ds->eager equals to a stream not being sparse
|
|
// (usually true, except if only sparse streams are selected).
|
|
// We also rely on the fact that the demuxer position will always be ahead
|
|
// of the seek_end for audio/video, because they need to prefetch at least
|
|
// 1 packet to detect the end of a keyframe range. This means that there's
|
|
// a relatively high guarantee to have all sparse (subtitle) packets within
|
|
// the seekable range.
|
|
// As a consequence, the code _never_ checks queue->seek_end for a sparse
|
|
// queue, as the end of it is implied by the highest PTS of a non-sparse
|
|
// stream (i.e. the latest demuxer position).
|
|
// On the other hand, if a sparse packet was pruned, and that packet has
|
|
// a higher PTS than seek_start for non-sparse queues, that packet is
|
|
// missing. So the range's seek_start needs to be adjusted accordingly.
|
|
for (int n = 0; n < range->num_streams; n++) {
|
|
struct demux_queue *queue = range->streams[n];
|
|
if (queue->ds->selected && !queue->ds->eager &&
|
|
queue->last_pruned != MP_NOPTS_VALUE &&
|
|
range->seek_start != MP_NOPTS_VALUE)
|
|
{
|
|
// (last_pruned is _exclusive_ to the seekable range, so add a small
|
|
// value to exclude it from the valid range.)
|
|
range->seek_start =
|
|
MP_PTS_MAX(range->seek_start, queue->last_pruned + 0.1);
|
|
}
|
|
}
|
|
|
|
if (range->seek_start >= range->seek_end)
|
|
goto broken;
|
|
|
|
prune_metadata(range);
|
|
return;
|
|
|
|
broken:
|
|
range->seek_start = range->seek_end = MP_NOPTS_VALUE;
|
|
prune_metadata(range);
|
|
}
|
|
|
|
// Remove queue->head from the queue.
|
|
static void remove_head_packet(struct demux_queue *queue)
|
|
{
|
|
struct demux_packet *dp = queue->head;
|
|
|
|
assert(queue->ds->reader_head != dp);
|
|
if (queue->keyframe_first == dp)
|
|
queue->keyframe_first = NULL;
|
|
if (queue->keyframe_latest == dp)
|
|
queue->keyframe_latest = NULL;
|
|
queue->is_bof = false;
|
|
|
|
uint64_t end_pos = dp->next ? dp->next->cum_pos : queue->tail_cum_pos;
|
|
queue->ds->in->total_bytes -= end_pos - dp->cum_pos;
|
|
|
|
if (queue->num_index && queue->index[queue->index0].pkt == dp) {
|
|
queue->index0 = (queue->index0 + 1) & QUEUE_INDEX_SIZE_MASK(queue);
|
|
queue->num_index -= 1;
|
|
}
|
|
|
|
queue->head = dp->next;
|
|
if (!queue->head)
|
|
queue->tail = NULL;
|
|
|
|
talloc_free(dp);
|
|
}
|
|
|
|
static void free_index(struct demux_queue *queue)
|
|
{
|
|
struct demux_stream *ds = queue->ds;
|
|
struct demux_internal *in = ds->in;
|
|
|
|
in->total_bytes -= queue->index_size * sizeof(queue->index[0]);
|
|
queue->index_size = 0;
|
|
queue->index0 = 0;
|
|
queue->num_index = 0;
|
|
TA_FREEP(&queue->index);
|
|
}
|
|
|
|
static void clear_queue(struct demux_queue *queue)
|
|
{
|
|
struct demux_stream *ds = queue->ds;
|
|
struct demux_internal *in = ds->in;
|
|
|
|
if (queue->head)
|
|
in->total_bytes -= queue->tail_cum_pos - queue->head->cum_pos;
|
|
|
|
free_index(queue);
|
|
|
|
struct demux_packet *dp = queue->head;
|
|
while (dp) {
|
|
struct demux_packet *dn = dp->next;
|
|
assert(ds->reader_head != dp);
|
|
talloc_free(dp);
|
|
dp = dn;
|
|
}
|
|
queue->head = queue->tail = NULL;
|
|
queue->keyframe_first = NULL;
|
|
queue->keyframe_latest = NULL;
|
|
queue->seek_start = queue->seek_end = queue->last_pruned = MP_NOPTS_VALUE;
|
|
|
|
queue->correct_dts = queue->correct_pos = true;
|
|
queue->last_pos = -1;
|
|
queue->last_ts = queue->last_dts = MP_NOPTS_VALUE;
|
|
queue->last_pos_fixup = -1;
|
|
|
|
queue->is_eof = false;
|
|
queue->is_bof = false;
|
|
}
|
|
|
|
static void clear_cached_range(struct demux_internal *in,
|
|
struct demux_cached_range *range)
|
|
{
|
|
for (int n = 0; n < range->num_streams; n++)
|
|
clear_queue(range->streams[n]);
|
|
|
|
for (int n = 0; n < range->num_metadata; n++)
|
|
talloc_free(range->metadata[n]);
|
|
range->num_metadata = 0;
|
|
|
|
update_seek_ranges(range);
|
|
}
|
|
|
|
// Remove ranges with no data (except in->current_range). Also remove excessive
|
|
// ranges.
|
|
static void free_empty_cached_ranges(struct demux_internal *in)
|
|
{
|
|
while (1) {
|
|
struct demux_cached_range *worst = NULL;
|
|
|
|
int end = in->num_ranges - 1;
|
|
|
|
// (Not set during early init or late destruction.)
|
|
if (in->current_range) {
|
|
assert(in->current_range && in->num_ranges > 0);
|
|
assert(in->current_range == in->ranges[in->num_ranges - 1]);
|
|
end -= 1;
|
|
}
|
|
|
|
for (int n = end; n >= 0; n--) {
|
|
struct demux_cached_range *range = in->ranges[n];
|
|
if (range->seek_start == MP_NOPTS_VALUE || !in->seekable_cache) {
|
|
clear_cached_range(in, range);
|
|
MP_TARRAY_REMOVE_AT(in->ranges, in->num_ranges, n);
|
|
for (int i = 0; i < range->num_streams; i++)
|
|
talloc_free(range->streams[i]);
|
|
talloc_free(range);
|
|
} else {
|
|
if (!worst || (range->seek_end - range->seek_start <
|
|
worst->seek_end - worst->seek_start))
|
|
worst = range;
|
|
}
|
|
}
|
|
|
|
if (in->num_ranges <= MAX_SEEK_RANGES || !worst)
|
|
break;
|
|
|
|
clear_cached_range(in, worst);
|
|
}
|
|
}
|
|
|
|
static void ds_clear_reader_queue_state(struct demux_stream *ds)
|
|
{
|
|
ds->reader_head = NULL;
|
|
ds->eof = false;
|
|
ds->need_wakeup = true;
|
|
}
|
|
|
|
static void ds_clear_reader_state(struct demux_stream *ds,
|
|
bool clear_back_state)
|
|
{
|
|
ds_clear_reader_queue_state(ds);
|
|
|
|
ds->base_ts = ds->last_br_ts = MP_NOPTS_VALUE;
|
|
ds->last_br_bytes = 0;
|
|
ds->bitrate = -1;
|
|
ds->skip_to_keyframe = false;
|
|
ds->attached_picture_added = false;
|
|
ds->last_ret_pos = -1;
|
|
ds->last_ret_dts = MP_NOPTS_VALUE;
|
|
|
|
if (clear_back_state) {
|
|
ds->back_restart_pos = -1;
|
|
ds->back_restart_dts = MP_NOPTS_VALUE;
|
|
ds->back_restart_eof = false;
|
|
ds->back_restart_next = ds->in->back_demuxing;
|
|
ds->back_restarting = ds->in->back_demuxing && ds->eager;
|
|
ds->back_seek_pos = MP_NOPTS_VALUE;
|
|
ds->back_resume_pos = -1;
|
|
ds->back_resume_dts = MP_NOPTS_VALUE;
|
|
ds->back_resuming = false;
|
|
ds->back_range_started = false;
|
|
ds->back_range_count = 0;
|
|
ds->back_range_preroll = 0;
|
|
}
|
|
}
|
|
|
|
// called locked, from user thread only
|
|
static void clear_reader_state(struct demux_internal *in,
|
|
bool clear_back_state)
|
|
{
|
|
for (int n = 0; n < in->num_streams; n++)
|
|
ds_clear_reader_state(in->streams[n]->ds, clear_back_state);
|
|
in->warned_queue_overflow = false;
|
|
in->d_user->filepos = -1; // implicitly synchronized
|
|
in->blocked = false;
|
|
in->need_back_seek = false;
|
|
}
|
|
|
|
// Call if the observed reader state on this stream somehow changes. The wakeup
|
|
// is skipped if the reader successfully read a packet, because that means we
|
|
// expect it to come back and ask for more.
|
|
static void wakeup_ds(struct demux_stream *ds)
|
|
{
|
|
if (ds->need_wakeup) {
|
|
if (ds->wakeup_cb) {
|
|
ds->wakeup_cb(ds->wakeup_cb_ctx);
|
|
} else if (ds->in->wakeup_cb) {
|
|
ds->in->wakeup_cb(ds->in->wakeup_cb_ctx);
|
|
}
|
|
ds->need_wakeup = false;
|
|
pthread_cond_signal(&ds->in->wakeup);
|
|
}
|
|
}
|
|
|
|
static void update_stream_selection_state(struct demux_internal *in,
|
|
struct demux_stream *ds)
|
|
{
|
|
ds->eof = false;
|
|
ds->refreshing = false;
|
|
|
|
// We still have to go over the whole stream list to update ds->eager for
|
|
// other streams too, because they depend on other stream's selections.
|
|
|
|
bool any_av_streams = false;
|
|
bool any_streams = false;
|
|
|
|
for (int n = 0; n < in->num_streams; n++) {
|
|
struct demux_stream *s = in->streams[n]->ds;
|
|
|
|
s->still_image = s->sh->still_image;
|
|
s->eager = s->selected && !s->sh->attached_picture;
|
|
if (s->eager && !s->still_image)
|
|
any_av_streams |= s->type != STREAM_SUB;
|
|
any_streams |= s->selected;
|
|
}
|
|
|
|
// Subtitles are only eagerly read if there are no other eagerly read
|
|
// streams.
|
|
if (any_av_streams) {
|
|
for (int n = 0; n < in->num_streams; n++) {
|
|
struct demux_stream *s = in->streams[n]->ds;
|
|
|
|
if (s->type == STREAM_SUB)
|
|
s->eager = false;
|
|
}
|
|
}
|
|
|
|
if (!any_streams)
|
|
in->blocked = false;
|
|
|
|
ds_clear_reader_state(ds, true);
|
|
|
|
// Make sure any stream reselection or addition is reflected in the seek
|
|
// ranges, and also get rid of data that is not needed anymore (or
|
|
// rather, which can't be kept consistent). This has to happen after we've
|
|
// updated all the subtle state (like s->eager).
|
|
for (int n = 0; n < in->num_ranges; n++) {
|
|
struct demux_cached_range *range = in->ranges[n];
|
|
|
|
if (!ds->selected)
|
|
clear_queue(range->streams[ds->index]);
|
|
|
|
update_seek_ranges(range);
|
|
}
|
|
|
|
free_empty_cached_ranges(in);
|
|
|
|
wakeup_ds(ds);
|
|
}
|
|
|
|
void demux_set_ts_offset(struct demuxer *demuxer, double offset)
|
|
{
|
|
struct demux_internal *in = demuxer->in;
|
|
pthread_mutex_lock(&in->lock);
|
|
in->ts_offset = offset;
|
|
pthread_mutex_unlock(&in->lock);
|
|
}
|
|
|
|
static void add_missing_streams(struct demux_internal *in,
|
|
struct demux_cached_range *range)
|
|
{
|
|
for (int n = range->num_streams; n < in->num_streams; n++) {
|
|
struct demux_stream *ds = in->streams[n]->ds;
|
|
|
|
struct demux_queue *queue = talloc_ptrtype(NULL, queue);
|
|
*queue = (struct demux_queue){
|
|
.ds = ds,
|
|
.range = range,
|
|
};
|
|
clear_queue(queue);
|
|
MP_TARRAY_APPEND(range, range->streams, range->num_streams, queue);
|
|
assert(range->streams[ds->index] == queue);
|
|
}
|
|
}
|
|
|
|
// Allocate a new sh_stream of the given type. It either has to be released
|
|
// with talloc_free(), or added to a demuxer with demux_add_sh_stream(). You
|
|
// cannot add or read packets from the stream before it has been added.
|
|
struct sh_stream *demux_alloc_sh_stream(enum stream_type type)
|
|
{
|
|
struct sh_stream *sh = talloc_ptrtype(NULL, sh);
|
|
*sh = (struct sh_stream) {
|
|
.type = type,
|
|
.index = -1,
|
|
.ff_index = -1, // may be overwritten by demuxer
|
|
.demuxer_id = -1, // ... same
|
|
.codec = talloc_zero(sh, struct mp_codec_params),
|
|
.tags = talloc_zero(sh, struct mp_tags),
|
|
};
|
|
sh->codec->type = type;
|
|
return sh;
|
|
}
|
|
|
|
// Add a new sh_stream to the demuxer. Note that as soon as the stream has been
|
|
// added, it must be immutable, and must not be released (this will happen when
|
|
// the demuxer is destroyed).
|
|
static void demux_add_sh_stream_locked(struct demux_internal *in,
|
|
struct sh_stream *sh)
|
|
{
|
|
assert(!sh->ds); // must not be added yet
|
|
|
|
sh->index = in->num_streams;
|
|
|
|
sh->ds = talloc(sh, struct demux_stream);
|
|
*sh->ds = (struct demux_stream) {
|
|
.in = in,
|
|
.sh = sh,
|
|
.type = sh->type,
|
|
.index = sh->index,
|
|
.global_correct_dts = true,
|
|
.global_correct_pos = true,
|
|
};
|
|
|
|
struct demux_stream *ds = sh->ds;
|
|
|
|
if (!sh->codec->codec)
|
|
sh->codec->codec = "";
|
|
|
|
if (sh->ff_index < 0)
|
|
sh->ff_index = sh->index;
|
|
|
|
MP_TARRAY_APPEND(in, in->streams, in->num_streams, sh);
|
|
assert(in->streams[sh->index] == sh);
|
|
|
|
if (in->current_range) {
|
|
for (int n = 0; n < in->num_ranges; n++)
|
|
add_missing_streams(in, in->ranges[n]);
|
|
|
|
sh->ds->queue = in->current_range->streams[sh->ds->index];
|
|
}
|
|
|
|
update_stream_selection_state(in, sh->ds);
|
|
|
|
switch (ds->type) {
|
|
case STREAM_AUDIO:
|
|
ds->back_preroll = in->opts->audio_back_preroll;
|
|
if (ds->back_preroll < 0) { // auto
|
|
ds->back_preroll = mp_codec_is_lossless(sh->codec->codec) ? 0 : 1;
|
|
if (sh->codec->codec && (strcmp(sh->codec->codec, "opus") == 0 ||
|
|
strcmp(sh->codec->codec, "vorbis") == 0 ||
|
|
strcmp(sh->codec->codec, "mp3") == 0))
|
|
ds->back_preroll = 2;
|
|
}
|
|
break;
|
|
case STREAM_VIDEO:
|
|
ds->back_preroll = in->opts->video_back_preroll;
|
|
if (ds->back_preroll < 0)
|
|
ds->back_preroll = 0; // auto
|
|
break;
|
|
}
|
|
|
|
if (!ds->sh->attached_picture) {
|
|
// Typically this is used for webradio, so any stream will do.
|
|
if (!in->metadata_stream)
|
|
in->metadata_stream = sh;
|
|
}
|
|
|
|
in->events |= DEMUX_EVENT_STREAMS;
|
|
if (in->wakeup_cb)
|
|
in->wakeup_cb(in->wakeup_cb_ctx);
|
|
}
|
|
|
|
// For demuxer implementations only.
|
|
void demux_add_sh_stream(struct demuxer *demuxer, struct sh_stream *sh)
|
|
{
|
|
struct demux_internal *in = demuxer->in;
|
|
assert(demuxer == in->d_thread);
|
|
pthread_mutex_lock(&in->lock);
|
|
demux_add_sh_stream_locked(in, sh);
|
|
pthread_mutex_unlock(&in->lock);
|
|
}
|
|
|
|
// Return a stream with the given index. Since streams can only be added during
|
|
// the lifetime of the demuxer, it is guaranteed that an index within the valid
|
|
// range [0, demux_get_num_stream()) always returns a valid sh_stream pointer,
|
|
// which will be valid until the demuxer is destroyed.
|
|
struct sh_stream *demux_get_stream(struct demuxer *demuxer, int index)
|
|
{
|
|
struct demux_internal *in = demuxer->in;
|
|
pthread_mutex_lock(&in->lock);
|
|
assert(index >= 0 && index < in->num_streams);
|
|
struct sh_stream *r = in->streams[index];
|
|
pthread_mutex_unlock(&in->lock);
|
|
return r;
|
|
}
|
|
|
|
// See demux_get_stream().
|
|
int demux_get_num_stream(struct demuxer *demuxer)
|
|
{
|
|
struct demux_internal *in = demuxer->in;
|
|
pthread_mutex_lock(&in->lock);
|
|
int r = in->num_streams;
|
|
pthread_mutex_unlock(&in->lock);
|
|
return r;
|
|
}
|
|
|
|
// It's UB to call anything but demux_dealloc() on the demuxer after this.
|
|
static void demux_shutdown(struct demux_internal *in)
|
|
{
|
|
struct demuxer *demuxer = in->d_user;
|
|
|
|
if (in->recorder) {
|
|
mp_recorder_destroy(in->recorder);
|
|
in->recorder = NULL;
|
|
}
|
|
|
|
dumper_close(in);
|
|
|
|
if (demuxer->desc->close)
|
|
demuxer->desc->close(in->d_thread);
|
|
demuxer->priv = NULL;
|
|
in->d_thread->priv = NULL;
|
|
|
|
demux_flush(demuxer);
|
|
assert(in->total_bytes == 0);
|
|
|
|
in->current_range = NULL;
|
|
free_empty_cached_ranges(in);
|
|
|
|
talloc_free(in->cache);
|
|
in->cache = NULL;
|
|
|
|
if (in->owns_stream)
|
|
free_stream(demuxer->stream);
|
|
demuxer->stream = NULL;
|
|
}
|
|
|
|
static void demux_dealloc(struct demux_internal *in)
|
|
{
|
|
for (int n = 0; n < in->num_streams; n++)
|
|
talloc_free(in->streams[n]);
|
|
pthread_mutex_destroy(&in->lock);
|
|
pthread_cond_destroy(&in->wakeup);
|
|
talloc_free(in->d_user);
|
|
}
|
|
|
|
void demux_free(struct demuxer *demuxer)
|
|
{
|
|
if (!demuxer)
|
|
return;
|
|
struct demux_internal *in = demuxer->in;
|
|
assert(demuxer == in->d_user);
|
|
|
|
demux_stop_thread(demuxer);
|
|
demux_shutdown(in);
|
|
demux_dealloc(in);
|
|
}
|
|
|
|
// Start closing the demuxer and eventually freeing the demuxer asynchronously.
|
|
// You must not access the demuxer once this has been started. Once the demuxer
|
|
// is shutdown, the wakeup callback is invoked. Then you need to call
|
|
// demux_free_async_finish() to end the operation (it must not be called from
|
|
// the wakeup callback).
|
|
// This can return NULL. Then the demuxer cannot be free'd asynchronously, and
|
|
// you need to call demux_free() instead.
|
|
struct demux_free_async_state *demux_free_async(struct demuxer *demuxer)
|
|
{
|
|
struct demux_internal *in = demuxer->in;
|
|
assert(demuxer == in->d_user);
|
|
|
|
if (!in->threading)
|
|
return NULL;
|
|
|
|
pthread_mutex_lock(&in->lock);
|
|
in->thread_terminate = true;
|
|
in->shutdown_async = true;
|
|
pthread_cond_signal(&in->wakeup);
|
|
pthread_mutex_unlock(&in->lock);
|
|
|
|
return (struct demux_free_async_state *)demuxer->in; // lies
|
|
}
|
|
|
|
// As long as state is valid, you can call this to request immediate abort.
|
|
// Roughly behaves as demux_cancel_and_free(), except you still need to wait
|
|
// for the result.
|
|
void demux_free_async_force(struct demux_free_async_state *state)
|
|
{
|
|
struct demux_internal *in = (struct demux_internal *)state; // reverse lies
|
|
|
|
mp_cancel_trigger(in->d_user->cancel);
|
|
}
|
|
|
|
// Check whether the demuxer is shutdown yet. If not, return false, and you
|
|
// need to call this again in the future (preferably after you were notified by
|
|
// the wakeup callback). If yes, deallocate all state, and return true (in
|
|
// particular, the state ptr becomes invalid, and the wakeup callback will never
|
|
// be called again).
|
|
bool demux_free_async_finish(struct demux_free_async_state *state)
|
|
{
|
|
struct demux_internal *in = (struct demux_internal *)state; // reverse lies
|
|
|
|
pthread_mutex_lock(&in->lock);
|
|
bool busy = in->shutdown_async;
|
|
pthread_mutex_unlock(&in->lock);
|
|
|
|
if (busy)
|
|
return false;
|
|
|
|
demux_stop_thread(in->d_user);
|
|
demux_dealloc(in);
|
|
return true;
|
|
}
|
|
|
|
// Like demux_free(), but trigger an abort, which will force the demuxer to
|
|
// terminate immediately. If this wasn't opened with demux_open_url(), there is
|
|
// some chance this will accidentally abort other things via demuxer->cancel.
|
|
void demux_cancel_and_free(struct demuxer *demuxer)
|
|
{
|
|
if (!demuxer)
|
|
return;
|
|
mp_cancel_trigger(demuxer->cancel);
|
|
demux_free(demuxer);
|
|
}
|
|
|
|
// Start the demuxer thread, which reads ahead packets on its own.
|
|
void demux_start_thread(struct demuxer *demuxer)
|
|
{
|
|
struct demux_internal *in = demuxer->in;
|
|
assert(demuxer == in->d_user);
|
|
|
|
if (!in->threading) {
|
|
in->threading = true;
|
|
if (pthread_create(&in->thread, NULL, demux_thread, in))
|
|
in->threading = false;
|
|
}
|
|
}
|
|
|
|
void demux_stop_thread(struct demuxer *demuxer)
|
|
{
|
|
struct demux_internal *in = demuxer->in;
|
|
assert(demuxer == in->d_user);
|
|
|
|
if (in->threading) {
|
|
pthread_mutex_lock(&in->lock);
|
|
in->thread_terminate = true;
|
|
pthread_cond_signal(&in->wakeup);
|
|
pthread_mutex_unlock(&in->lock);
|
|
pthread_join(in->thread, NULL);
|
|
in->threading = false;
|
|
in->thread_terminate = false;
|
|
}
|
|
}
|
|
|
|
// The demuxer thread will call cb(ctx) if there's a new packet, or EOF is reached.
|
|
void demux_set_wakeup_cb(struct demuxer *demuxer, void (*cb)(void *ctx), void *ctx)
|
|
{
|
|
struct demux_internal *in = demuxer->in;
|
|
pthread_mutex_lock(&in->lock);
|
|
in->wakeup_cb = cb;
|
|
in->wakeup_cb_ctx = ctx;
|
|
pthread_mutex_unlock(&in->lock);
|
|
}
|
|
|
|
void demux_start_prefetch(struct demuxer *demuxer)
|
|
{
|
|
struct demux_internal *in = demuxer->in;
|
|
assert(demuxer == in->d_user);
|
|
|
|
pthread_mutex_lock(&in->lock);
|
|
in->reading = true;
|
|
pthread_cond_signal(&in->wakeup);
|
|
pthread_mutex_unlock(&in->lock);
|
|
}
|
|
|
|
const char *stream_type_name(enum stream_type type)
|
|
{
|
|
switch (type) {
|
|
case STREAM_VIDEO: return "video";
|
|
case STREAM_AUDIO: return "audio";
|
|
case STREAM_SUB: return "sub";
|
|
default: return "unknown";
|
|
}
|
|
}
|
|
|
|
static struct sh_stream *demuxer_get_cc_track_locked(struct sh_stream *stream)
|
|
{
|
|
struct sh_stream *sh = stream->ds->cc;
|
|
|
|
if (!sh) {
|
|
sh = demux_alloc_sh_stream(STREAM_SUB);
|
|
if (!sh)
|
|
return NULL;
|
|
sh->codec->codec = "eia_608";
|
|
sh->default_track = true;
|
|
stream->ds->cc = sh;
|
|
demux_add_sh_stream_locked(stream->ds->in, sh);
|
|
sh->ds->ignore_eof = true;
|
|
}
|
|
|
|
return sh;
|
|
}
|
|
|
|
void demuxer_feed_caption(struct sh_stream *stream, demux_packet_t *dp)
|
|
{
|
|
struct demux_internal *in = stream->ds->in;
|
|
|
|
pthread_mutex_lock(&in->lock);
|
|
struct sh_stream *sh = demuxer_get_cc_track_locked(stream);
|
|
if (!sh) {
|
|
pthread_mutex_unlock(&in->lock);
|
|
talloc_free(dp);
|
|
return;
|
|
}
|
|
|
|
dp->keyframe = true;
|
|
dp->pts = MP_ADD_PTS(dp->pts, -in->ts_offset);
|
|
dp->dts = MP_ADD_PTS(dp->dts, -in->ts_offset);
|
|
dp->stream = sh->index;
|
|
add_packet_locked(sh, dp);
|
|
pthread_mutex_unlock(&in->lock);
|
|
}
|
|
|
|
static void error_on_backward_demuxing(struct demux_internal *in)
|
|
{
|
|
if (!in->back_demuxing)
|
|
return;
|
|
MP_ERR(in, "Disabling backward demuxing.\n");
|
|
in->back_demuxing = false;
|
|
clear_reader_state(in, true);
|
|
}
|
|
|
|
static void perform_backward_seek(struct demux_internal *in)
|
|
{
|
|
double target = MP_NOPTS_VALUE;
|
|
|
|
for (int n = 0; n < in->num_streams; n++) {
|
|
struct demux_stream *ds = in->streams[n]->ds;
|
|
|
|
if (ds->reader_head && !ds->back_restarting && !ds->back_resuming &&
|
|
ds->eager)
|
|
{
|
|
ds->back_resuming = true;
|
|
ds->back_resume_pos = ds->reader_head->pos;
|
|
ds->back_resume_dts = ds->reader_head->dts;
|
|
}
|
|
|
|
target = MP_PTS_MIN(target, ds->back_seek_pos);
|
|
}
|
|
|
|
target = MP_PTS_OR_DEF(target, in->d_thread->start_time);
|
|
|
|
MP_VERBOSE(in, "triggering backward seek to get more packets\n");
|
|
queue_seek(in, target, SEEK_SATAN | SEEK_HR, false);
|
|
in->reading = true;
|
|
|
|
// Don't starve other threads.
|
|
pthread_mutex_unlock(&in->lock);
|
|
pthread_mutex_lock(&in->lock);
|
|
}
|
|
|
|
// For incremental backward demuxing search work.
|
|
static void check_backward_seek(struct demux_internal *in)
|
|
{
|
|
in->back_any_need_recheck = false;
|
|
|
|
for (int n = 0; n < in->num_streams; n++) {
|
|
struct demux_stream *ds = in->streams[n]->ds;
|
|
|
|
if (ds->back_need_recheck)
|
|
find_backward_restart_pos(ds);
|
|
}
|
|
}
|
|
|
|
// Search for a packet to resume demuxing from.
|
|
// The implementation of this function is quite awkward, because the packet
|
|
// queue is a singly linked list without back links, while it needs to search
|
|
// backwards.
|
|
// This is the core of backward demuxing.
|
|
static void find_backward_restart_pos(struct demux_stream *ds)
|
|
{
|
|
struct demux_internal *in = ds->in;
|
|
|
|
ds->back_need_recheck = false;
|
|
if (!ds->back_restarting)
|
|
return;
|
|
|
|
struct demux_packet *first = ds->reader_head;
|
|
struct demux_packet *last = ds->queue->tail;
|
|
|
|
if (first && !first->keyframe)
|
|
MP_WARN(in, "Queue not starting on keyframe.\n");
|
|
|
|
// Packet at back_restart_pos. (Note: we don't actually need it, only the
|
|
// packet immediately before it. But same effort.)
|
|
// If this is NULL, look for EOF (resume from very last keyframe).
|
|
struct demux_packet *back_restart = NULL;
|
|
|
|
if (ds->back_restart_next) {
|
|
// Initial state. Switch to one of the other modi.
|
|
|
|
for (struct demux_packet *cur = first; cur; cur = cur->next) {
|
|
// Restart for next keyframe after reader_head.
|
|
if (cur != first && cur->keyframe) {
|
|
ds->back_restart_dts = cur->dts;
|
|
ds->back_restart_pos = cur->pos;
|
|
ds->back_restart_eof = false;
|
|
ds->back_restart_next = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (ds->back_restart_next && ds->eof) {
|
|
// Restart from end if nothing was found.
|
|
ds->back_restart_eof = true;
|
|
ds->back_restart_next = false;
|
|
}
|
|
|
|
if (ds->back_restart_next)
|
|
return;
|
|
}
|
|
|
|
if (ds->back_restart_eof) {
|
|
// We're trying to find EOF (without discarding packets). Only continue
|
|
// if we really reach EOF.
|
|
if (!ds->eof)
|
|
return;
|
|
} else if (!first && ds->eof) {
|
|
// Reached EOF during normal backward demuxing. We probably returned the
|
|
// last keyframe range to user. Need to resume at an earlier position.
|
|
// Fall through, hit the no-keyframe case (and possibly the BOF check
|
|
// if there are no packets at all), and then resume_earlier.
|
|
} else if (!first) {
|
|
return; // no packets yet
|
|
} else {
|
|
assert(last);
|
|
|
|
if ((ds->global_correct_dts && last->dts < ds->back_restart_dts) ||
|
|
(ds->global_correct_pos && last->pos < ds->back_restart_pos))
|
|
return; // restart pos not reached yet
|
|
|
|
// The target we're searching for is apparently before the start of the
|
|
// queue.
|
|
if ((ds->global_correct_dts && first->dts > ds->back_restart_dts) ||
|
|
(ds->global_correct_pos && first->pos > ds->back_restart_pos))
|
|
goto resume_earlier; // current position is too late; seek back
|
|
|
|
|
|
for (struct demux_packet *cur = first; cur; cur = cur->next) {
|
|
if ((ds->global_correct_dts && cur->dts == ds->back_restart_dts) ||
|
|
(ds->global_correct_pos && cur->pos == ds->back_restart_pos))
|
|
{
|
|
back_restart = cur;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!back_restart) {
|
|
// The packet should have been in the searched range; maybe dts/pos
|
|
// determinism assumptions were broken.
|
|
MP_ERR(in, "Demuxer not cooperating.\n");
|
|
error_on_backward_demuxing(in);
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Find where to restart demuxing. It's usually the last keyframe packet
|
|
// before restart_pos, but might be up to back_preroll + batch keyframe
|
|
// packets earlier.
|
|
|
|
// (Normally, we'd just iterate backwards, but no back links.)
|
|
int num_kf = 0;
|
|
struct demux_packet *pre_1 = NULL; // idiotic "optimization" for total=1
|
|
for (struct demux_packet *dp = first; dp != back_restart; dp = dp->next) {
|
|
if (dp->keyframe) {
|
|
num_kf++;
|
|
pre_1 = dp;
|
|
}
|
|
}
|
|
|
|
// Number of renderable keyframes to return to user.
|
|
// (Excludes preroll, which is decoded by user, but then discarded.)
|
|
int batch = MPMAX(in->opts->back_batch[ds->type], 1);
|
|
// Number of keyframes to return to the user in total.
|
|
int total = batch + ds->back_preroll;
|
|
|
|
assert(total >= 1);
|
|
|
|
bool is_bof = ds->queue->is_bof &&
|
|
(first == ds->queue->head || ds->back_seek_pos < ds->queue->seek_start);
|
|
|
|
struct demux_packet *target = NULL; // resume pos
|
|
// nr. of keyframes, incl. target, excl. restart_pos
|
|
int got_total = num_kf < total && is_bof ? num_kf : total;
|
|
int got_preroll = MPMAX(got_total - batch, 0);
|
|
|
|
if (got_total == 1) {
|
|
target = pre_1;
|
|
} else if (got_total <= num_kf) {
|
|
int cur_kf = 0;
|
|
for (struct demux_packet *dp = first; dp != back_restart; dp = dp->next) {
|
|
if (dp->keyframe) {
|
|
if (num_kf - cur_kf == got_total) {
|
|
target = dp;
|
|
break;
|
|
}
|
|
cur_kf++;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!target) {
|
|
if (is_bof) {
|
|
MP_VERBOSE(in, "BOF for stream %d\n", ds->index);
|
|
ds->back_restarting = false;
|
|
ds->back_range_started = false;
|
|
ds->back_range_count = -1;
|
|
ds->back_range_preroll = 0;
|
|
ds->need_wakeup = true;
|
|
wakeup_ds(ds);
|
|
return;
|
|
}
|
|
goto resume_earlier;
|
|
}
|
|
|
|
// Skip reader_head from previous keyframe to current one.
|
|
// Or if preroll is involved, the first preroll packet.
|
|
while (ds->reader_head != target) {
|
|
if (!advance_reader_head(ds))
|
|
assert(0); // target must be in list
|
|
}
|
|
|
|
double seek_pts;
|
|
compute_keyframe_times(target, &seek_pts, NULL);
|
|
if (seek_pts != MP_NOPTS_VALUE)
|
|
ds->back_seek_pos = seek_pts;
|
|
|
|
// For next backward adjust action.
|
|
struct demux_packet *restart_pkt = NULL;
|
|
int kf_pos = 0;
|
|
for (struct demux_packet *dp = target; dp; dp = dp->next) {
|
|
if (dp->keyframe) {
|
|
if (kf_pos == got_preroll) {
|
|
restart_pkt = dp;
|
|
break;
|
|
}
|
|
kf_pos++;
|
|
}
|
|
}
|
|
assert(restart_pkt);
|
|
ds->back_restart_dts = restart_pkt->dts;
|
|
ds->back_restart_pos = restart_pkt->pos;
|
|
|
|
ds->back_restarting = false;
|
|
ds->back_range_started = false;
|
|
ds->back_range_count = got_total;
|
|
ds->back_range_preroll = got_preroll;
|
|
ds->need_wakeup = true;
|
|
wakeup_ds(ds);
|
|
return;
|
|
|
|
resume_earlier:
|
|
// We want to seek back to get earlier packets. But before we do this, we
|
|
// must be sure that other streams have initialized their state. The only
|
|
// time when this state is not initialized is right after the seek that
|
|
// started backward demuxing (not any subsequent backstep seek). If this
|
|
// initialization is omitted, the stream would try to start demuxing from
|
|
// the "current" position. If another stream backstepped before that, the
|
|
// other stream will miss the original seek target, and start playback from
|
|
// a position that is too early.
|
|
for (int n = 0; n < in->num_streams; n++) {
|
|
struct demux_stream *ds2 = in->streams[n]->ds;
|
|
if (ds2 == ds || !ds2->eager)
|
|
continue;
|
|
|
|
if (ds2->back_restarting && ds2->back_restart_next) {
|
|
MP_VERBOSE(in, "delaying stream %d for %d\n", ds->index, ds2->index);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (ds->back_seek_pos != MP_NOPTS_VALUE) {
|
|
struct demux_packet *t =
|
|
find_seek_target(ds->queue, ds->back_seek_pos - 0.001, 0);
|
|
if (t && t != ds->reader_head) {
|
|
double pts;
|
|
compute_keyframe_times(t, &pts, NULL);
|
|
ds->back_seek_pos = MP_PTS_MIN(ds->back_seek_pos, pts);
|
|
ds_clear_reader_state(ds, false);
|
|
ds->reader_head = t;
|
|
ds->back_need_recheck = true;
|
|
in->back_any_need_recheck = true;
|
|
} else {
|
|
ds->back_seek_pos -= in->opts->back_seek_size;
|
|
in->need_back_seek = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Process that one or multiple packets were added.
|
|
static void back_demux_see_packets(struct demux_stream *ds)
|
|
{
|
|
struct demux_internal *in = ds->in;
|
|
|
|
if (!ds->selected || !in->back_demuxing)
|
|
return;
|
|
|
|
assert(!(ds->back_resuming && ds->back_restarting));
|
|
|
|
if (!ds->global_correct_dts && !ds->global_correct_pos) {
|
|
MP_ERR(in, "Can't demux backward due to demuxer problems.\n");
|
|
error_on_backward_demuxing(in);
|
|
return;
|
|
}
|
|
|
|
while (ds->back_resuming && ds->reader_head) {
|
|
struct demux_packet *head = ds->reader_head;
|
|
if ((ds->global_correct_dts && head->dts == ds->back_resume_dts) ||
|
|
(ds->global_correct_pos && head->pos == ds->back_resume_pos))
|
|
{
|
|
ds->back_resuming = false;
|
|
ds->need_wakeup = true;
|
|
wakeup_ds(ds); // probably
|
|
break;
|
|
}
|
|
advance_reader_head(ds);
|
|
}
|
|
|
|
if (ds->back_restarting)
|
|
find_backward_restart_pos(ds);
|
|
}
|
|
|
|
// Add the keyframe to the end of the index. Not all packets are actually added.
|
|
static void add_index_entry(struct demux_queue *queue, struct demux_packet *dp,
|
|
double pts)
|
|
{
|
|
struct demux_internal *in = queue->ds->in;
|
|
|
|
assert(dp->keyframe && pts != MP_NOPTS_VALUE);
|
|
|
|
if (queue->num_index > 0) {
|
|
struct index_entry *last = &QUEUE_INDEX_ENTRY(queue, queue->num_index - 1);
|
|
if (pts - last->pts < INDEX_STEP_SIZE)
|
|
return;
|
|
}
|
|
|
|
if (queue->num_index == queue->index_size) {
|
|
// Needs to honor power-of-2 requirement.
|
|
size_t new_size = MPMAX(128, queue->index_size * 2);
|
|
assert(!(new_size & (new_size - 1)));
|
|
MP_DBG(in, "stream %d: resize index to %zu\n", queue->ds->index,
|
|
new_size);
|
|
// Note: we could tolerate allocation failure, and just discard the
|
|
// entire index (and prevent the index from being recreated).
|
|
MP_RESIZE_ARRAY(NULL, queue->index, new_size);
|
|
size_t highest_index = queue->index0 + queue->num_index;
|
|
for (size_t n = queue->index_size; n < highest_index; n++)
|
|
queue->index[n] = queue->index[n - queue->index_size];
|
|
in->total_bytes +=
|
|
(new_size - queue->index_size) * sizeof(queue->index[0]);
|
|
queue->index_size = new_size;
|
|
}
|
|
|
|
assert(queue->num_index < queue->index_size);
|
|
|
|
queue->num_index += 1;
|
|
|
|
QUEUE_INDEX_ENTRY(queue, queue->num_index - 1) = (struct index_entry){
|
|
.pts = pts,
|
|
.pkt = dp,
|
|
};
|
|
}
|
|
|
|
// Check whether the next range in the list is, and if it appears to overlap,
|
|
// try joining it into a single range.
|
|
static void attempt_range_joining(struct demux_internal *in)
|
|
{
|
|
struct demux_cached_range *current = in->current_range;
|
|
struct demux_cached_range *next = NULL;
|
|
double next_dist = INFINITY;
|
|
|
|
assert(current && in->num_ranges > 0);
|
|
assert(current == in->ranges[in->num_ranges - 1]);
|
|
|
|
for (int n = 0; n < in->num_ranges - 1; n++) {
|
|
struct demux_cached_range *range = in->ranges[n];
|
|
|
|
if (current->seek_start <= range->seek_start) {
|
|
// This uses ">" to get some non-0 overlap.
|
|
double dist = current->seek_end - range->seek_start;
|
|
if (dist > 0 && dist < next_dist) {
|
|
next = range;
|
|
next_dist = dist;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!next)
|
|
return;
|
|
|
|
MP_VERBOSE(in, "going to join ranges %f-%f + %f-%f\n",
|
|
current->seek_start, current->seek_end,
|
|
next->seek_start, next->seek_end);
|
|
|
|
// Try to find a join point, where packets obviously overlap. (It would be
|
|
// better and faster to do this incrementally, but probably too complex.)
|
|
// The current range can overlap arbitrarily with the next one, not only by
|
|
// by the seek overlap, but for arbitrary packet readahead as well.
|
|
// We also drop the overlapping packets (if joining fails, we discard the
|
|
// entire next range anyway, so this does no harm).
|
|
for (int n = 0; n < in->num_streams; n++) {
|
|
struct demux_stream *ds = in->streams[n]->ds;
|
|
|
|
struct demux_queue *q1 = current->streams[n];
|
|
struct demux_queue *q2 = next->streams[n];
|
|
|
|
if (!ds->global_correct_pos && !ds->global_correct_dts) {
|
|
MP_WARN(in, "stream %d: ranges unjoinable\n", n);
|
|
goto failed;
|
|
}
|
|
|
|
struct demux_packet *end = q1->tail;
|
|
bool join_point_found = !end; // no packets yet -> joining will work
|
|
if (end) {
|
|
while (q2->head) {
|
|
struct demux_packet *dp = q2->head;
|
|
|
|
// Some weird corner-case. We'd have to search the equivalent
|
|
// packet in q1 to update it correctly. Better just give up.
|
|
if (dp == q2->keyframe_latest) {
|
|
MP_VERBOSE(in, "stream %d: not enough keyframes for join\n", n);
|
|
goto failed;
|
|
}
|
|
|
|
if ((ds->global_correct_dts && dp->dts == end->dts) ||
|
|
(ds->global_correct_pos && dp->pos == end->pos))
|
|
{
|
|
// Do some additional checks as a (imperfect) sanity check
|
|
// in case pos/dts are not "correct" across the ranges (we
|
|
// never actually check that).
|
|
if (dp->dts != end->dts || dp->pos != end->pos ||
|
|
dp->pts != end->pts)
|
|
{
|
|
MP_WARN(in,
|
|
"stream %d: non-repeatable demuxer behavior\n", n);
|
|
goto failed;
|
|
}
|
|
|
|
remove_head_packet(q2);
|
|
join_point_found = true;
|
|
break;
|
|
}
|
|
|
|
// This happens if the next range misses the end packet. For
|
|
// normal streams (ds->eager==true), this is a failure to find
|
|
// an overlap. For subtitles, this can mean the current_range
|
|
// has a subtitle somewhere before the end of its range, and
|
|
// next has another subtitle somewhere after the start of its
|
|
// range.
|
|
if ((ds->global_correct_dts && dp->dts > end->dts) ||
|
|
(ds->global_correct_pos && dp->pos > end->pos))
|
|
break;
|
|
|
|
remove_head_packet(q2);
|
|
}
|
|
}
|
|
|
|
// For enabled non-sparse streams, always require an overlap packet.
|
|
if (ds->eager && !join_point_found) {
|
|
MP_WARN(in, "stream %d: no join point found\n", n);
|
|
goto failed;
|
|
}
|
|
}
|
|
|
|
// Actually join the ranges. Now that we think it will work, mutate the
|
|
// data associated with the current range.
|
|
|
|
for (int n = 0; n < in->num_streams; n++) {
|
|
struct demux_queue *q1 = current->streams[n];
|
|
struct demux_queue *q2 = next->streams[n];
|
|
|
|
struct demux_stream *ds = in->streams[n]->ds;
|
|
assert(ds->queue == q1);
|
|
|
|
// First new packet that is appended to the current range.
|
|
struct demux_packet *join_point = q2->head;
|
|
|
|
if (q2->head) {
|
|
if (q1->head) {
|
|
q1->tail->next = q2->head;
|
|
} else {
|
|
q1->head = q2->head;
|
|
}
|
|
q1->tail = q2->tail;
|
|
}
|
|
|
|
q1->seek_end = q2->seek_end;
|
|
q1->correct_dts &= q2->correct_dts;
|
|
q1->correct_pos &= q2->correct_pos;
|
|
q1->last_pos = q2->last_pos;
|
|
q1->last_dts = q2->last_dts;
|
|
q1->last_ts = q2->last_ts;
|
|
q1->keyframe_latest = q2->keyframe_latest;
|
|
q1->is_eof = q2->is_eof;
|
|
|
|
q1->last_pos_fixup = -1;
|
|
|
|
q2->head = q2->tail = NULL;
|
|
q2->keyframe_first = NULL;
|
|
q2->keyframe_latest = NULL;
|
|
|
|
if (ds->selected && !ds->reader_head)
|
|
ds->reader_head = join_point;
|
|
ds->skip_to_keyframe = false;
|
|
|
|
// Make the cum_pos values in all q2 packets continuous.
|
|
for (struct demux_packet *dp = join_point; dp; dp = dp->next) {
|
|
uint64_t next_pos = dp->next ? dp->next->cum_pos : q2->tail_cum_pos;
|
|
uint64_t size = next_pos - dp->cum_pos;
|
|
dp->cum_pos = q1->tail_cum_pos;
|
|
q1->tail_cum_pos += size;
|
|
}
|
|
|
|
// And update the index with packets from q2.
|
|
for (size_t i = 0; i < q2->num_index; i++) {
|
|
struct index_entry *e = &QUEUE_INDEX_ENTRY(q2, i);
|
|
add_index_entry(q1, e->pkt, e->pts);
|
|
}
|
|
free_index(q2);
|
|
|
|
// For moving demuxer position.
|
|
ds->refreshing = ds->selected;
|
|
}
|
|
|
|
for (int n = 0; n < next->num_metadata; n++) {
|
|
MP_TARRAY_APPEND(current, current->metadata, current->num_metadata,
|
|
next->metadata[n]);
|
|
}
|
|
next->num_metadata = 0;
|
|
|
|
update_seek_ranges(current);
|
|
|
|
// Move demuxing position to after the current range.
|
|
in->seeking = true;
|
|
in->seek_flags = SEEK_HR;
|
|
in->seek_pts = next->seek_end - 1.0;
|
|
|
|
MP_VERBOSE(in, "ranges joined!\n");
|
|
|
|
for (int n = 0; n < in->num_streams; n++)
|
|
back_demux_see_packets(in->streams[n]->ds);
|
|
|
|
failed:
|
|
clear_cached_range(in, next);
|
|
free_empty_cached_ranges(in);
|
|
}
|
|
|
|
// Compute the assumed first and last frame timestamp for keyframe range
|
|
// starting at pkt. To get valid results, pkt->keyframe must be true, otherwise
|
|
// nonsense will be returned.
|
|
// Always sets *out_kf_min and *out_kf_max without reading them. Both are set
|
|
// to NOPTS if there are no timestamps at all in the stream. *kf_max will not
|
|
// be set to the actual end time of the decoded output, just the last frame
|
|
// (audio will typically end up with kf_min==kf_max).
|
|
// Either of out_kf_min and out_kf_max can be NULL, which discards the result.
|
|
// Return the next keyframe packet after pkt, or NULL if there's none.
|
|
static struct demux_packet *compute_keyframe_times(struct demux_packet *pkt,
|
|
double *out_kf_min,
|
|
double *out_kf_max)
|
|
{
|
|
struct demux_packet *start = pkt;
|
|
double min = MP_NOPTS_VALUE;
|
|
double max = MP_NOPTS_VALUE;
|
|
|
|
while (pkt) {
|
|
if (pkt->keyframe && pkt != start)
|
|
break;
|
|
|
|
double ts = MP_PTS_OR_DEF(pkt->pts, pkt->dts);
|
|
if (pkt->segmented && (ts < pkt->start || ts > pkt->end))
|
|
ts = MP_NOPTS_VALUE;
|
|
|
|
min = MP_PTS_MIN(min, ts);
|
|
max = MP_PTS_MAX(max, ts);
|
|
|
|
pkt = pkt->next;
|
|
}
|
|
|
|
if (out_kf_min)
|
|
*out_kf_min = min;
|
|
if (out_kf_max)
|
|
*out_kf_max = max;
|
|
return pkt;
|
|
}
|
|
|
|
// Determine seekable range when a packet is added. If dp==NULL, treat it as
|
|
// EOF (i.e. closes the current block).
|
|
// This has to deal with a number of corner cases, such as demuxers potentially
|
|
// starting output at non-keyframes.
|
|
// Can join seek ranges, which messes with in->current_range and all.
|
|
static void adjust_seek_range_on_packet(struct demux_stream *ds,
|
|
struct demux_packet *dp)
|
|
{
|
|
struct demux_queue *queue = ds->queue;
|
|
|
|
if (!ds->in->seekable_cache)
|
|
return;
|
|
|
|
bool new_eof = !dp;
|
|
bool update_ranges = queue->is_eof != new_eof;
|
|
queue->is_eof = new_eof;
|
|
|
|
if (!dp || dp->keyframe) {
|
|
if (queue->keyframe_latest) {
|
|
double kf_min, kf_max;
|
|
compute_keyframe_times(queue->keyframe_latest, &kf_min, &kf_max);
|
|
|
|
if (kf_min != MP_NOPTS_VALUE) {
|
|
add_index_entry(queue, queue->keyframe_latest, kf_min);
|
|
|
|
// Initialize the queue's start if it's unset.
|
|
if (queue->seek_start == MP_NOPTS_VALUE) {
|
|
update_ranges = true;
|
|
queue->seek_start = kf_min + ds->sh->seek_preroll;
|
|
}
|
|
}
|
|
|
|
if (kf_max != MP_NOPTS_VALUE &&
|
|
(queue->seek_end == MP_NOPTS_VALUE || kf_max > queue->seek_end))
|
|
{
|
|
// If the queue was past the current range's end even before
|
|
// this update, it means _other_ streams are not there yet,
|
|
// and the seek range doesn't need to be updated. This means
|
|
// if the _old_ queue->seek_end was already after the range end,
|
|
// then the new seek_end won't extend the range either.
|
|
if (queue->range->seek_end == MP_NOPTS_VALUE ||
|
|
queue->seek_end <= queue->range->seek_end)
|
|
{
|
|
update_ranges = true;
|
|
}
|
|
|
|
queue->seek_end = kf_max;
|
|
}
|
|
}
|
|
|
|
queue->keyframe_latest = dp;
|
|
}
|
|
|
|
if (update_ranges) {
|
|
update_seek_ranges(queue->range);
|
|
attempt_range_joining(ds->in);
|
|
}
|
|
}
|
|
|
|
static struct mp_recorder *recorder_create(struct demux_internal *in,
|
|
const char *dst)
|
|
{
|
|
struct sh_stream **streams = NULL;
|
|
int num_streams = 0;
|
|
for (int n = 0; n < in->num_streams; n++) {
|
|
struct sh_stream *stream = in->streams[n];
|
|
if (stream->ds->selected)
|
|
MP_TARRAY_APPEND(NULL, streams, num_streams, stream);
|
|
}
|
|
struct mp_recorder *res = mp_recorder_create(in->d_thread->global, dst,
|
|
streams, num_streams);
|
|
talloc_free(streams);
|
|
return res;
|
|
}
|
|
|
|
static void write_dump_packet(struct demux_internal *in, struct demux_packet *dp)
|
|
{
|
|
assert(in->dumper);
|
|
assert(in->dumper_status == CONTROL_TRUE);
|
|
|
|
struct mp_recorder_sink *sink =
|
|
mp_recorder_get_sink(in->dumper, in->streams[dp->stream]);
|
|
if (sink) {
|
|
mp_recorder_feed_packet(sink, dp);
|
|
} else {
|
|
MP_ERR(in, "New stream appeared; stopping recording.\n");
|
|
in->dumper_status = CONTROL_ERROR;
|
|
}
|
|
}
|
|
|
|
static void record_packet(struct demux_internal *in, struct demux_packet *dp)
|
|
{
|
|
// (should preferably be outside of the lock)
|
|
if (in->enable_recording && !in->recorder &&
|
|
in->opts->record_file && in->opts->record_file[0])
|
|
{
|
|
// Later failures shouldn't make it retry and overwrite the previously
|
|
// recorded file.
|
|
in->enable_recording = false;
|
|
|
|
in->recorder = recorder_create(in, in->opts->record_file);
|
|
if (!in->recorder)
|
|
MP_ERR(in, "Disabling recording.\n");
|
|
}
|
|
|
|
if (in->recorder) {
|
|
struct mp_recorder_sink *sink =
|
|
mp_recorder_get_sink(in->recorder, in->streams[dp->stream]);
|
|
if (sink) {
|
|
mp_recorder_feed_packet(sink, dp);
|
|
} else {
|
|
MP_ERR(in, "New stream appeared; stopping recording.\n");
|
|
mp_recorder_destroy(in->recorder);
|
|
in->recorder = NULL;
|
|
}
|
|
}
|
|
|
|
if (in->dumper_status == CONTROL_OK)
|
|
write_dump_packet(in, dp);
|
|
}
|
|
|
|
static void add_packet_locked(struct sh_stream *stream, demux_packet_t *dp)
|
|
{
|
|
struct demux_stream *ds = stream ? stream->ds : NULL;
|
|
if (!dp->len || demux_cancel_test(ds->in->d_thread)) {
|
|
talloc_free(dp);
|
|
return;
|
|
}
|
|
|
|
assert(dp->stream == stream->index);
|
|
assert(!dp->next);
|
|
|
|
struct demux_internal *in = ds->in;
|
|
|
|
in->after_seek = false;
|
|
in->after_seek_to_start = false;
|
|
|
|
double ts = dp->dts == MP_NOPTS_VALUE ? dp->pts : dp->dts;
|
|
if (dp->segmented)
|
|
ts = MP_PTS_MIN(ts, dp->end);
|
|
|
|
if (ts != MP_NOPTS_VALUE)
|
|
in->demux_ts = ts;
|
|
|
|
struct demux_queue *queue = ds->queue;
|
|
|
|
bool drop = !ds->selected || in->seeking || ds->sh->attached_picture;
|
|
|
|
if (!drop) {
|
|
// If libavformat splits packets, some packets will have pos unset, so
|
|
// make up one based on the first packet => makes refresh seeks work.
|
|
if (dp->pos < 0 && !dp->keyframe && queue->last_pos_fixup >= 0)
|
|
dp->pos = queue->last_pos_fixup + 1;
|
|
queue->last_pos_fixup = dp->pos;
|
|
}
|
|
|
|
if (!drop && ds->refreshing) {
|
|
// Resume reading once the old position was reached (i.e. we start
|
|
// returning packets where we left off before the refresh).
|
|
// If it's the same position, drop, but continue normally next time.
|
|
if (queue->correct_dts) {
|
|
ds->refreshing = dp->dts < queue->last_dts;
|
|
} else if (queue->correct_pos) {
|
|
ds->refreshing = dp->pos < queue->last_pos;
|
|
} else {
|
|
ds->refreshing = false; // should not happen
|
|
MP_WARN(in, "stream %d: demux refreshing failed\n", ds->index);
|
|
}
|
|
drop = true;
|
|
}
|
|
|
|
if (drop) {
|
|
talloc_free(dp);
|
|
return;
|
|
}
|
|
|
|
record_packet(in, dp);
|
|
|
|
if (in->cache && in->opts->disk_cache) {
|
|
int64_t pos = demux_cache_write(in->cache, dp);
|
|
if (pos >= 0) {
|
|
demux_packet_unref_contents(dp);
|
|
dp->is_cached = true;
|
|
dp->cached_data.pos = pos;
|
|
}
|
|
}
|
|
|
|
queue->correct_pos &= dp->pos >= 0 && dp->pos > queue->last_pos;
|
|
queue->correct_dts &= dp->dts != MP_NOPTS_VALUE && dp->dts > queue->last_dts;
|
|
queue->last_pos = dp->pos;
|
|
queue->last_dts = dp->dts;
|
|
ds->global_correct_pos &= queue->correct_pos;
|
|
ds->global_correct_dts &= queue->correct_dts;
|
|
|
|
// (keep in mind that even if the reader went out of data, the queue is not
|
|
// necessarily empty due to the backbuffer)
|
|
if (!ds->reader_head && (!ds->skip_to_keyframe || dp->keyframe)) {
|
|
ds->reader_head = dp;
|
|
ds->skip_to_keyframe = false;
|
|
}
|
|
|
|
size_t bytes = demux_packet_estimate_total_size(dp);
|
|
in->total_bytes += bytes;
|
|
dp->cum_pos = queue->tail_cum_pos;
|
|
queue->tail_cum_pos += bytes;
|
|
|
|
if (queue->tail) {
|
|
// next packet in stream
|
|
queue->tail->next = dp;
|
|
queue->tail = dp;
|
|
} else {
|
|
// first packet in stream
|
|
queue->head = queue->tail = dp;
|
|
}
|
|
|
|
if (!ds->ignore_eof) {
|
|
// obviously not true anymore
|
|
ds->eof = false;
|
|
in->last_eof = in->eof = false;
|
|
}
|
|
|
|
// For video, PTS determination is not trivial, but for other media types
|
|
// distinguishing PTS and DTS is not useful.
|
|
if (stream->type != STREAM_VIDEO && dp->pts == MP_NOPTS_VALUE)
|
|
dp->pts = dp->dts;
|
|
|
|
if (ts != MP_NOPTS_VALUE && (ts > queue->last_ts || ts + 10 < queue->last_ts))
|
|
queue->last_ts = ts;
|
|
if (ds->base_ts == MP_NOPTS_VALUE)
|
|
ds->base_ts = queue->last_ts;
|
|
|
|
const char *num_pkts = queue->head == queue->tail ? "1" : ">1";
|
|
uint64_t fw_bytes = get_foward_buffered_bytes(ds);
|
|
MP_TRACE(in, "append packet to %s: size=%zu pts=%f dts=%f pos=%"PRIi64" "
|
|
"[num=%s size=%zd]\n", stream_type_name(stream->type),
|
|
dp->len, dp->pts, dp->dts, dp->pos, num_pkts, (size_t)fw_bytes);
|
|
|
|
adjust_seek_range_on_packet(ds, dp);
|
|
|
|
// May need to reduce backward cache.
|
|
prune_old_packets(in);
|
|
|
|
// Possibly update duration based on highest TS demuxed (but ignore subs).
|
|
if (stream->type != STREAM_SUB) {
|
|
if (dp->segmented)
|
|
ts = MP_PTS_MIN(ts, dp->end);
|
|
if (ts > in->highest_av_pts) {
|
|
in->highest_av_pts = ts;
|
|
double duration = in->highest_av_pts - in->d_thread->start_time;
|
|
if (duration > in->d_thread->duration) {
|
|
in->d_thread->duration = duration;
|
|
// (Don't wakeup user thread, would be too noisy.)
|
|
in->events |= DEMUX_EVENT_DURATION;
|
|
in->duration = duration;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Don't process the packet further if it's skipped by the previous seek
|
|
// (see reader_head check/assignment above).
|
|
if (!ds->reader_head)
|
|
return;
|
|
|
|
back_demux_see_packets(ds);
|
|
|
|
wakeup_ds(ds);
|
|
}
|
|
|
|
static void mark_stream_eof(struct demux_stream *ds)
|
|
{
|
|
if (!ds->eof) {
|
|
ds->eof = true;
|
|
adjust_seek_range_on_packet(ds, NULL);
|
|
back_demux_see_packets(ds);
|
|
wakeup_ds(ds);
|
|
}
|
|
}
|
|
|
|
// Returns true if there was "progress" (lock was released temporarily).
|
|
static bool read_packet(struct demux_internal *in)
|
|
{
|
|
in->eof = false;
|
|
in->idle = true;
|
|
|
|
if (!in->reading || in->blocked || demux_cancel_test(in->d_thread))
|
|
return false;
|
|
|
|
// Check if we need to read a new packet. We do this if all queues are below
|
|
// the minimum, or if a stream explicitly needs new packets. Also includes
|
|
// safe-guards against packet queue overflow.
|
|
bool read_more = false, prefetch_more = false, refresh_more = false;
|
|
uint64_t total_fw_bytes = 0;
|
|
for (int n = 0; n < in->num_streams; n++) {
|
|
struct demux_stream *ds = in->streams[n]->ds;
|
|
if (ds->eager) {
|
|
read_more |= !ds->reader_head;
|
|
if (in->back_demuxing)
|
|
read_more |= ds->back_restarting || ds->back_resuming;
|
|
}
|
|
refresh_more |= ds->refreshing;
|
|
if (ds->eager && ds->queue->last_ts != MP_NOPTS_VALUE &&
|
|
in->min_secs > 0 && ds->base_ts != MP_NOPTS_VALUE &&
|
|
ds->queue->last_ts >= ds->base_ts &&
|
|
!in->back_demuxing)
|
|
prefetch_more |= ds->queue->last_ts - ds->base_ts < in->min_secs;
|
|
total_fw_bytes += get_foward_buffered_bytes(ds);
|
|
}
|
|
|
|
MP_TRACE(in, "bytes=%zd, read_more=%d prefetch_more=%d, refresh_more=%d\n",
|
|
(size_t)total_fw_bytes, read_more, prefetch_more, refresh_more);
|
|
if (total_fw_bytes >= in->max_bytes) {
|
|
// if we hit the limit just by prefetching, simply stop prefetching
|
|
if (!read_more)
|
|
return false;
|
|
if (!in->warned_queue_overflow) {
|
|
in->warned_queue_overflow = true;
|
|
MP_WARN(in, "Too many packets in the demuxer packet queues:\n");
|
|
for (int n = 0; n < in->num_streams; n++) {
|
|
struct demux_stream *ds = in->streams[n]->ds;
|
|
if (ds->selected) {
|
|
size_t num_pkts = 0;
|
|
for (struct demux_packet *dp = ds->reader_head;
|
|
dp; dp = dp->next)
|
|
num_pkts++;
|
|
uint64_t fw_bytes = get_foward_buffered_bytes(ds);
|
|
MP_WARN(in, " %s/%d: %zd packets, %zd bytes%s%s\n",
|
|
stream_type_name(ds->type), n,
|
|
num_pkts, (size_t)fw_bytes,
|
|
ds->eager ? "" : " (lazy)",
|
|
ds->refreshing ? " (refreshing)" : "");
|
|
}
|
|
}
|
|
if (in->back_demuxing)
|
|
MP_ERR(in, "Backward playback is likely stuck/broken now.\n");
|
|
}
|
|
for (int n = 0; n < in->num_streams; n++) {
|
|
struct demux_stream *ds = in->streams[n]->ds;
|
|
if (!ds->reader_head)
|
|
mark_stream_eof(ds);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
if (!read_more && !prefetch_more && !refresh_more)
|
|
return false;
|
|
|
|
if (in->after_seek_to_start) {
|
|
for (int n = 0; n < in->num_streams; n++) {
|
|
struct demux_stream *ds = in->streams[n]->ds;
|
|
in->current_range->streams[n]->is_bof =
|
|
ds->selected && !ds->refreshing;
|
|
}
|
|
}
|
|
|
|
// Actually read a packet. Drop the lock while doing so, because waiting
|
|
// for disk or network I/O can take time.
|
|
in->idle = false;
|
|
in->after_seek = false;
|
|
in->after_seek_to_start = false;
|
|
pthread_mutex_unlock(&in->lock);
|
|
|
|
struct demuxer *demux = in->d_thread;
|
|
struct demux_packet *pkt = NULL;
|
|
|
|
bool eof = true;
|
|
if (demux->desc->read_packet && !demux_cancel_test(demux))
|
|
eof = !demux->desc->read_packet(demux, &pkt);
|
|
update_cache(in);
|
|
|
|
pthread_mutex_lock(&in->lock);
|
|
|
|
if (pkt) {
|
|
assert(pkt->stream >= 0 && pkt->stream < in->num_streams);
|
|
add_packet_locked(in->streams[pkt->stream], pkt);
|
|
}
|
|
|
|
if (!in->seeking) {
|
|
if (eof) {
|
|
for (int n = 0; n < in->num_streams; n++)
|
|
mark_stream_eof(in->streams[n]->ds);
|
|
// If we had EOF previously, then don't wakeup (avoids wakeup loop)
|
|
if (!in->last_eof) {
|
|
if (in->wakeup_cb)
|
|
in->wakeup_cb(in->wakeup_cb_ctx);
|
|
pthread_cond_signal(&in->wakeup);
|
|
MP_VERBOSE(in, "EOF reached.\n");
|
|
}
|
|
}
|
|
in->eof = in->last_eof = eof;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static void prune_old_packets(struct demux_internal *in)
|
|
{
|
|
assert(in->current_range == in->ranges[in->num_ranges - 1]);
|
|
|
|
// It's not clear what the ideal way to prune old packets is. For now, we
|
|
// prune the oldest packet runs, as long as the total cache amount is too
|
|
// big.
|
|
while (1) {
|
|
uint64_t fw_bytes = 0;
|
|
for (int n = 0; n < in->num_streams; n++) {
|
|
struct demux_stream *ds = in->streams[n]->ds;
|
|
fw_bytes += get_foward_buffered_bytes(ds);
|
|
}
|
|
uint64_t max_avail = in->max_bytes_bw;
|
|
// Backward cache (if enabled at all) can use unused forward cache.
|
|
// Still leave 1 byte free, so the read_packet logic doesn't get stuck.
|
|
if (max_avail && in->max_bytes > (fw_bytes + 1) && in->opts->donate_fw)
|
|
max_avail += in->max_bytes - (fw_bytes + 1);
|
|
if (in->total_bytes - fw_bytes <= max_avail)
|
|
break;
|
|
|
|
// (Start from least recently used range.)
|
|
struct demux_cached_range *range = in->ranges[0];
|
|
double earliest_ts = MP_NOPTS_VALUE;
|
|
struct demux_stream *earliest_stream = NULL;
|
|
|
|
for (int n = 0; n < range->num_streams; n++) {
|
|
struct demux_queue *queue = range->streams[n];
|
|
struct demux_stream *ds = queue->ds;
|
|
|
|
if (queue->head && queue->head != ds->reader_head) {
|
|
struct demux_packet *dp = queue->head;
|
|
double ts = queue->seek_start;
|
|
// If the ts is NOPTS, the queue has no retainable packets, so
|
|
// delete them all. This code is not run when there's enough
|
|
// free space, so normally the queue gets the chance to build up.
|
|
bool prune_always =
|
|
!in->seekable_cache || ts == MP_NOPTS_VALUE || !dp->keyframe;
|
|
if (prune_always || !earliest_stream || ts < earliest_ts) {
|
|
earliest_ts = ts;
|
|
earliest_stream = ds;
|
|
if (prune_always)
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// In some cases (like when the seek index became huge), there aren't
|
|
// any backwards packets, even if the total cache size is exceeded.
|
|
if (!earliest_stream)
|
|
break;
|
|
|
|
struct demux_stream *ds = earliest_stream;
|
|
struct demux_queue *queue = range->streams[ds->index];
|
|
|
|
bool non_kf_prune = queue->head && !queue->head->keyframe;
|
|
bool kf_was_pruned = false;
|
|
|
|
while (queue->head && queue->head != ds->reader_head) {
|
|
if (queue->head->keyframe) {
|
|
// If the cache is seekable, only delete until up the next
|
|
// keyframe. This is not always efficient, but ensures we
|
|
// prune all streams fairly.
|
|
// Also, if the first packet was _not_ a keyframe, we want it
|
|
// to remove all preceding non-keyframe packets first, before
|
|
// re-evaluating what to prune next.
|
|
if ((kf_was_pruned || non_kf_prune) && in->seekable_cache)
|
|
break;
|
|
kf_was_pruned = true;
|
|
}
|
|
|
|
remove_head_packet(queue);
|
|
}
|
|
|
|
// Need to update the seekable time range.
|
|
if (kf_was_pruned) {
|
|
assert(!queue->keyframe_first); // it was just deleted, supposedly
|
|
|
|
queue->keyframe_first = queue->head;
|
|
// (May happen if reader_head stopped pruning the range, and there's
|
|
// no next range.)
|
|
while (queue->keyframe_first && !queue->keyframe_first->keyframe)
|
|
queue->keyframe_first = queue->keyframe_first->next;
|
|
|
|
if (queue->seek_start != MP_NOPTS_VALUE)
|
|
queue->last_pruned = queue->seek_start;
|
|
|
|
double kf_min;
|
|
compute_keyframe_times(queue->keyframe_first, &kf_min, NULL);
|
|
|
|
bool update_range = true;
|
|
|
|
queue->seek_start = kf_min;
|
|
|
|
if (queue->seek_start != MP_NOPTS_VALUE) {
|
|
queue->seek_start += ds->sh->seek_preroll;
|
|
|
|
// Don't need to update if the new start is still before the
|
|
// range's start (or if the range was undefined anyway).
|
|
if (range->seek_start == MP_NOPTS_VALUE ||
|
|
queue->seek_start <= range->seek_start)
|
|
{
|
|
update_range = false;
|
|
}
|
|
}
|
|
|
|
if (update_range)
|
|
update_seek_ranges(range);
|
|
}
|
|
|
|
if (range != in->current_range && range->seek_start == MP_NOPTS_VALUE)
|
|
free_empty_cached_ranges(in);
|
|
}
|
|
}
|
|
|
|
static void execute_trackswitch(struct demux_internal *in)
|
|
{
|
|
in->tracks_switched = false;
|
|
|
|
bool any_selected = false;
|
|
for (int n = 0; n < in->num_streams; n++)
|
|
any_selected |= in->streams[n]->ds->selected;
|
|
|
|
pthread_mutex_unlock(&in->lock);
|
|
|
|
if (in->d_thread->desc->switched_tracks)
|
|
in->d_thread->desc->switched_tracks(in->d_thread);
|
|
|
|
pthread_mutex_lock(&in->lock);
|
|
}
|
|
|
|
static void execute_seek(struct demux_internal *in)
|
|
{
|
|
int flags = in->seek_flags;
|
|
double pts = in->seek_pts;
|
|
in->last_eof = in->eof = false;
|
|
in->seeking = false;
|
|
in->seeking_in_progress = pts;
|
|
in->demux_ts = MP_NOPTS_VALUE;
|
|
in->low_level_seeks += 1;
|
|
in->after_seek = true;
|
|
in->after_seek_to_start =
|
|
!(flags & (SEEK_FORWARD | SEEK_FACTOR)) &&
|
|
pts <= in->d_thread->start_time;
|
|
|
|
for (int n = 0; n < in->num_streams; n++)
|
|
in->streams[n]->ds->queue->last_pos_fixup = -1;
|
|
|
|
if (in->recorder)
|
|
mp_recorder_mark_discontinuity(in->recorder);
|
|
|
|
pthread_mutex_unlock(&in->lock);
|
|
|
|
MP_VERBOSE(in, "execute seek (to %f flags %d)\n", pts, flags);
|
|
|
|
if (in->d_thread->desc->seek)
|
|
in->d_thread->desc->seek(in->d_thread, pts, flags);
|
|
|
|
MP_VERBOSE(in, "seek done\n");
|
|
|
|
pthread_mutex_lock(&in->lock);
|
|
|
|
in->seeking_in_progress = MP_NOPTS_VALUE;
|
|
}
|
|
|
|
static void update_opts(struct demux_internal *in)
|
|
{
|
|
struct demux_opts *opts = in->opts;
|
|
|
|
in->min_secs = opts->min_secs;
|
|
in->max_bytes = opts->max_bytes;
|
|
in->max_bytes_bw = opts->max_bytes_bw;
|
|
|
|
int seekable = opts->seekable_cache;
|
|
bool is_streaming = in->d_thread->is_streaming;
|
|
bool use_cache = is_streaming;
|
|
if (opts->enable_cache >= 0)
|
|
use_cache = opts->enable_cache == 1;
|
|
|
|
if (use_cache) {
|
|
in->min_secs = MPMAX(in->min_secs, opts->min_secs_cache);
|
|
if (seekable < 0)
|
|
seekable = 1;
|
|
}
|
|
in->seekable_cache = seekable == 1;
|
|
in->using_network_cache_opts = is_streaming && use_cache;
|
|
|
|
if (!in->seekable_cache)
|
|
in->max_bytes_bw = 0;
|
|
|
|
if (!in->can_cache) {
|
|
in->seekable_cache = false;
|
|
in->min_secs = 0;
|
|
in->max_bytes = 1;
|
|
in->max_bytes_bw = 0;
|
|
in->using_network_cache_opts = false;
|
|
}
|
|
|
|
if (in->seekable_cache && opts->disk_cache && !in->cache) {
|
|
in->cache = demux_cache_create(in->global, in->log);
|
|
if (!in->cache)
|
|
MP_ERR(in, "Failed to create file cache.\n");
|
|
}
|
|
|
|
// The filename option really decides whether recording should be active.
|
|
// So if the filename changes, act upon it.
|
|
char *old = in->record_filename ? in->record_filename : "";
|
|
char *new = opts->record_file ? opts->record_file : "";
|
|
if (strcmp(old, new) != 0) {
|
|
if (in->recorder) {
|
|
MP_WARN(in, "Stopping recording.\n");
|
|
mp_recorder_destroy(in->recorder);
|
|
in->recorder = NULL;
|
|
}
|
|
talloc_free(in->record_filename);
|
|
in->record_filename = talloc_strdup(in, opts->record_file);
|
|
// Note: actual recording only starts once packets are read. It may be
|
|
// important to delay creating in->recorder to that point, because the
|
|
// demuxer might detect more streams until finding the first packet.
|
|
in->enable_recording = in->can_record;
|
|
}
|
|
|
|
// In case the cache was reduced in size.
|
|
prune_old_packets(in);
|
|
|
|
// In case the seekable cache was disabled.
|
|
free_empty_cached_ranges(in);
|
|
}
|
|
|
|
// Make demuxing progress. Return whether progress was made.
|
|
static bool thread_work(struct demux_internal *in)
|
|
{
|
|
if (m_config_cache_update(in->opts_cache))
|
|
update_opts(in);
|
|
if (in->tracks_switched) {
|
|
execute_trackswitch(in);
|
|
return true;
|
|
}
|
|
if (in->need_back_seek) {
|
|
perform_backward_seek(in);
|
|
return true;
|
|
}
|
|
if (in->back_any_need_recheck) {
|
|
check_backward_seek(in);
|
|
return true;
|
|
}
|
|
if (in->seeking) {
|
|
execute_seek(in);
|
|
return true;
|
|
}
|
|
if (!in->eof) {
|
|
if (read_packet(in))
|
|
return true; // read_packet unlocked, so recheck conditions
|
|
}
|
|
if (mp_time_us() >= in->next_cache_update) {
|
|
pthread_mutex_unlock(&in->lock);
|
|
update_cache(in);
|
|
pthread_mutex_lock(&in->lock);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static void *demux_thread(void *pctx)
|
|
{
|
|
struct demux_internal *in = pctx;
|
|
mpthread_set_name("demux");
|
|
pthread_mutex_lock(&in->lock);
|
|
|
|
while (!in->thread_terminate) {
|
|
if (thread_work(in))
|
|
continue;
|
|
pthread_cond_signal(&in->wakeup);
|
|
struct timespec until = mp_time_us_to_timespec(in->next_cache_update);
|
|
pthread_cond_timedwait(&in->wakeup, &in->lock, &until);
|
|
}
|
|
|
|
if (in->shutdown_async) {
|
|
pthread_mutex_unlock(&in->lock);
|
|
demux_shutdown(in);
|
|
pthread_mutex_lock(&in->lock);
|
|
in->shutdown_async = false;
|
|
if (in->wakeup_cb)
|
|
in->wakeup_cb(in->wakeup_cb_ctx);
|
|
}
|
|
|
|
pthread_mutex_unlock(&in->lock);
|
|
return NULL;
|
|
}
|
|
|
|
// Low-level part of dequeueing a packet.
|
|
static struct demux_packet *advance_reader_head(struct demux_stream *ds)
|
|
{
|
|
struct demux_packet *pkt = ds->reader_head;
|
|
if (!pkt)
|
|
return NULL;
|
|
|
|
ds->reader_head = pkt->next;
|
|
|
|
ds->last_ret_pos = pkt->pos;
|
|
ds->last_ret_dts = pkt->dts;
|
|
|
|
return pkt;
|
|
}
|
|
|
|
// Return a newly allocated new packet. The pkt parameter may be either a
|
|
// in-memory packet (then a new reference is made), or a reference to
|
|
// packet in the disk cache (then the packet is read from disk).
|
|
static struct demux_packet *read_packet_from_cache(struct demux_internal *in,
|
|
struct demux_packet *pkt)
|
|
{
|
|
if (!pkt)
|
|
return NULL;
|
|
|
|
if (pkt->is_cached) {
|
|
assert(in->cache);
|
|
struct demux_packet *meta = pkt;
|
|
pkt = demux_cache_read(in->cache, pkt->cached_data.pos);
|
|
if (pkt) {
|
|
demux_packet_copy_attribs(pkt, meta);
|
|
} else {
|
|
MP_ERR(in, "Failed to retrieve packet from cache.\n");
|
|
}
|
|
} else {
|
|
// The returned packet is mutated etc. and will be owned by the user.
|
|
pkt = demux_copy_packet(pkt);
|
|
}
|
|
|
|
return pkt;
|
|
}
|
|
|
|
// Returns:
|
|
// < 0: EOF was reached, *res is not set
|
|
// == 0: no new packet yet, wait, *res is not set
|
|
// > 0: new packet is moved to *res
|
|
static int dequeue_packet(struct demux_stream *ds, struct demux_packet **res)
|
|
{
|
|
struct demux_internal *in = ds->in;
|
|
|
|
if (!ds->selected)
|
|
return -1;
|
|
if (in->blocked)
|
|
return 0;
|
|
|
|
if (ds->sh->attached_picture) {
|
|
ds->eof = true;
|
|
if (ds->attached_picture_added)
|
|
return -1;
|
|
ds->attached_picture_added = true;
|
|
struct demux_packet *pkt = demux_copy_packet(ds->sh->attached_picture);
|
|
if (!pkt)
|
|
abort();
|
|
pkt->stream = ds->sh->index;
|
|
*res = pkt;
|
|
return 1;
|
|
}
|
|
|
|
if (ds->eager) {
|
|
in->reading = true; // enable readahead
|
|
in->eof = false; // force retry
|
|
pthread_cond_signal(&in->wakeup); // possibly read more
|
|
}
|
|
|
|
if (ds->back_resuming || ds->back_restarting) {
|
|
assert(in->back_demuxing);
|
|
return 0;
|
|
}
|
|
|
|
bool eof = !ds->reader_head && ds->eof;
|
|
|
|
if (in->back_demuxing) {
|
|
// Subtitles not supported => EOF.
|
|
if (!ds->eager)
|
|
return -1;
|
|
|
|
// Next keyframe (or EOF) was reached => step back.
|
|
if (ds->back_range_started && !ds->back_range_count &&
|
|
((ds->reader_head && ds->reader_head->keyframe) || eof))
|
|
{
|
|
ds->back_restarting = true;
|
|
ds->back_restart_eof = false;
|
|
ds->back_restart_next = false;
|
|
|
|
find_backward_restart_pos(ds);
|
|
|
|
if (ds->back_restarting)
|
|
return 0;
|
|
}
|
|
|
|
eof = ds->back_range_count < 0;
|
|
}
|
|
|
|
ds->need_wakeup = !ds->reader_head;
|
|
if (!ds->reader_head || eof) {
|
|
if (!ds->eager) {
|
|
// Non-eager streams temporarily return EOF. If they returned 0,
|
|
// the reader would have to wait for new packets, which does not
|
|
// make sense due to the sparseness and passiveness of non-eager
|
|
// streams.
|
|
return -1;
|
|
}
|
|
return eof ? -1 : 0;
|
|
}
|
|
|
|
struct demux_packet *pkt = advance_reader_head(ds);
|
|
assert(pkt);
|
|
pkt = read_packet_from_cache(in, pkt);
|
|
if (!pkt)
|
|
return 0;
|
|
|
|
if (in->back_demuxing) {
|
|
if (pkt->keyframe) {
|
|
assert(ds->back_range_count > 0);
|
|
ds->back_range_count -= 1;
|
|
if (ds->back_range_preroll >= 0)
|
|
ds->back_range_preroll -= 1;
|
|
}
|
|
|
|
if (ds->back_range_preroll >= 0)
|
|
pkt->back_preroll = true;
|
|
|
|
if (!ds->back_range_started) {
|
|
pkt->back_restart = true;
|
|
ds->back_range_started = true;
|
|
}
|
|
}
|
|
|
|
double ts = MP_PTS_OR_DEF(pkt->dts, pkt->pts);
|
|
if (ts != MP_NOPTS_VALUE)
|
|
ds->base_ts = ts;
|
|
|
|
if (pkt->keyframe && ts != MP_NOPTS_VALUE) {
|
|
// Update bitrate - only at keyframe points, because we use the
|
|
// (possibly) reordered packet timestamps instead of realtime.
|
|
double d = ts - ds->last_br_ts;
|
|
if (ds->last_br_ts == MP_NOPTS_VALUE || d < 0) {
|
|
ds->bitrate = -1;
|
|
ds->last_br_ts = ts;
|
|
ds->last_br_bytes = 0;
|
|
} else if (d >= 0.5) { // a window of least 500ms for UI purposes
|
|
ds->bitrate = ds->last_br_bytes / d;
|
|
ds->last_br_ts = ts;
|
|
ds->last_br_bytes = 0;
|
|
}
|
|
}
|
|
ds->last_br_bytes += pkt->len;
|
|
|
|
// This implies this function is actually called from "the" user thread.
|
|
if (pkt->pos >= in->d_user->filepos)
|
|
in->d_user->filepos = pkt->pos;
|
|
in->d_user->filesize = in->stream_size;
|
|
|
|
pkt->pts = MP_ADD_PTS(pkt->pts, in->ts_offset);
|
|
pkt->dts = MP_ADD_PTS(pkt->dts, in->ts_offset);
|
|
|
|
if (pkt->segmented) {
|
|
pkt->start = MP_ADD_PTS(pkt->start, in->ts_offset);
|
|
pkt->end = MP_ADD_PTS(pkt->end, in->ts_offset);
|
|
}
|
|
|
|
prune_old_packets(in);
|
|
*res = pkt;
|
|
return 1;
|
|
}
|
|
|
|
// Poll the demuxer queue, and if there's a packet, return it. Otherwise, just
|
|
// make the demuxer thread read packets for this stream, and if there's at
|
|
// least one packet, call the wakeup callback.
|
|
// This enables readahead if it wasn't yet (except for interleaved subtitles).
|
|
// Returns:
|
|
// < 0: EOF was reached, *out_pkt=NULL
|
|
// == 0: no new packet yet, but maybe later, *out_pkt=NULL
|
|
// > 0: new packet read, *out_pkt is set
|
|
// Note: when reading interleaved subtitles, the demuxer won't try to forcibly
|
|
// read ahead to get the next subtitle packet (as the next packet could be
|
|
// minutes away). In this situation, this function will just return -1.
|
|
int demux_read_packet_async(struct sh_stream *sh, struct demux_packet **out_pkt)
|
|
{
|
|
struct demux_stream *ds = sh ? sh->ds : NULL;
|
|
*out_pkt = NULL;
|
|
if (!ds)
|
|
return -1;
|
|
struct demux_internal *in = ds->in;
|
|
|
|
pthread_mutex_lock(&in->lock);
|
|
int r = -1;
|
|
while (1) {
|
|
r = dequeue_packet(ds, out_pkt);
|
|
if (in->threading || in->blocked || r != 0)
|
|
break;
|
|
// Needs to actually read packets until we got a packet or EOF.
|
|
thread_work(in);
|
|
}
|
|
pthread_mutex_unlock(&in->lock);
|
|
return r;
|
|
}
|
|
|
|
// Read and return any packet we find. NULL means EOF.
|
|
// Does not work with threading (don't call demux_start_thread()).
|
|
struct demux_packet *demux_read_any_packet(struct demuxer *demuxer)
|
|
{
|
|
struct demux_internal *in = demuxer->in;
|
|
pthread_mutex_lock(&in->lock);
|
|
assert(!in->threading); // doesn't work with threading
|
|
struct demux_packet *out_pkt = NULL;
|
|
bool read_more = true;
|
|
while (read_more && !in->blocked) {
|
|
bool all_eof = true;
|
|
for (int n = 0; n < in->num_streams; n++) {
|
|
in->reading = true; // force read_packet() to read
|
|
int r = dequeue_packet(in->streams[n]->ds, &out_pkt);
|
|
if (r > 0)
|
|
goto done;
|
|
if (r == 0)
|
|
all_eof = false;
|
|
}
|
|
// retry after calling this
|
|
read_more = thread_work(in);
|
|
read_more &= !all_eof;
|
|
}
|
|
done:
|
|
pthread_mutex_unlock(&in->lock);
|
|
return out_pkt;
|
|
}
|
|
|
|
void demuxer_help(struct mp_log *log)
|
|
{
|
|
int i;
|
|
|
|
mp_info(log, "Available demuxers:\n");
|
|
mp_info(log, " demuxer: info:\n");
|
|
for (i = 0; demuxer_list[i]; i++) {
|
|
mp_info(log, "%10s %s\n",
|
|
demuxer_list[i]->name, demuxer_list[i]->desc);
|
|
}
|
|
}
|
|
|
|
static const char *d_level(enum demux_check level)
|
|
{
|
|
switch (level) {
|
|
case DEMUX_CHECK_FORCE: return "force";
|
|
case DEMUX_CHECK_UNSAFE: return "unsafe";
|
|
case DEMUX_CHECK_REQUEST:return "request";
|
|
case DEMUX_CHECK_NORMAL: return "normal";
|
|
}
|
|
abort();
|
|
}
|
|
|
|
static int decode_float(char *str, float *out)
|
|
{
|
|
char *rest;
|
|
float dec_val;
|
|
|
|
dec_val = strtod(str, &rest);
|
|
if (!rest || (rest == str) || !isfinite(dec_val))
|
|
return -1;
|
|
|
|
*out = dec_val;
|
|
return 0;
|
|
}
|
|
|
|
static int decode_gain(struct mp_log *log, struct mp_tags *tags,
|
|
const char *tag, float *out)
|
|
{
|
|
char *tag_val = NULL;
|
|
float dec_val;
|
|
|
|
tag_val = mp_tags_get_str(tags, tag);
|
|
if (!tag_val)
|
|
return -1;
|
|
|
|
if (decode_float(tag_val, &dec_val) < 0) {
|
|
mp_msg(log, MSGL_ERR, "Invalid replaygain value\n");
|
|
return -1;
|
|
}
|
|
|
|
*out = dec_val;
|
|
return 0;
|
|
}
|
|
|
|
static int decode_peak(struct mp_log *log, struct mp_tags *tags,
|
|
const char *tag, float *out)
|
|
{
|
|
char *tag_val = NULL;
|
|
float dec_val;
|
|
|
|
*out = 1.0;
|
|
|
|
tag_val = mp_tags_get_str(tags, tag);
|
|
if (!tag_val)
|
|
return 0;
|
|
|
|
if (decode_float(tag_val, &dec_val) < 0 || dec_val <= 0.0)
|
|
return -1;
|
|
|
|
*out = dec_val;
|
|
return 0;
|
|
}
|
|
|
|
static struct replaygain_data *decode_rgain(struct mp_log *log,
|
|
struct mp_tags *tags)
|
|
{
|
|
struct replaygain_data rg = {0};
|
|
|
|
// Set values in *rg, using track gain as a fallback for album gain if the
|
|
// latter is not present. This behavior matches that in demux/demux_lavf.c's
|
|
// export_replaygain; if you change this, please make equivalent changes
|
|
// there too.
|
|
if (decode_gain(log, tags, "REPLAYGAIN_TRACK_GAIN", &rg.track_gain) >= 0 &&
|
|
decode_peak(log, tags, "REPLAYGAIN_TRACK_PEAK", &rg.track_peak) >= 0)
|
|
{
|
|
if (decode_gain(log, tags, "REPLAYGAIN_ALBUM_GAIN", &rg.album_gain) < 0 ||
|
|
decode_peak(log, tags, "REPLAYGAIN_ALBUM_PEAK", &rg.album_peak) < 0)
|
|
{
|
|
// Album gain is undefined; fall back to track gain.
|
|
rg.album_gain = rg.track_gain;
|
|
rg.album_peak = rg.track_peak;
|
|
}
|
|
return talloc_dup(NULL, &rg);
|
|
}
|
|
|
|
if (decode_gain(log, tags, "REPLAYGAIN_GAIN", &rg.track_gain) >= 0 &&
|
|
decode_peak(log, tags, "REPLAYGAIN_PEAK", &rg.track_peak) >= 0)
|
|
{
|
|
rg.album_gain = rg.track_gain;
|
|
rg.album_peak = rg.track_peak;
|
|
return talloc_dup(NULL, &rg);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static void demux_update_replaygain(demuxer_t *demuxer)
|
|
{
|
|
struct demux_internal *in = demuxer->in;
|
|
for (int n = 0; n < in->num_streams; n++) {
|
|
struct sh_stream *sh = in->streams[n];
|
|
if (sh->type == STREAM_AUDIO && !sh->codec->replaygain_data) {
|
|
struct replaygain_data *rg = decode_rgain(demuxer->log, sh->tags);
|
|
if (!rg)
|
|
rg = decode_rgain(demuxer->log, demuxer->metadata);
|
|
if (rg)
|
|
sh->codec->replaygain_data = talloc_steal(in, rg);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Copy some fields from src to dst (for initialization).
|
|
static void demux_copy(struct demuxer *dst, struct demuxer *src)
|
|
{
|
|
// Note that we do as shallow copies as possible. We expect the data
|
|
// that is not-copied (only referenced) to be immutable.
|
|
// This implies e.g. that no chapters are added after initialization.
|
|
dst->chapters = src->chapters;
|
|
dst->num_chapters = src->num_chapters;
|
|
dst->editions = src->editions;
|
|
dst->num_editions = src->num_editions;
|
|
dst->edition = src->edition;
|
|
dst->attachments = src->attachments;
|
|
dst->num_attachments = src->num_attachments;
|
|
dst->matroska_data = src->matroska_data;
|
|
dst->playlist = src->playlist;
|
|
dst->seekable = src->seekable;
|
|
dst->partially_seekable = src->partially_seekable;
|
|
dst->filetype = src->filetype;
|
|
dst->ts_resets_possible = src->ts_resets_possible;
|
|
dst->fully_read = src->fully_read;
|
|
dst->start_time = src->start_time;
|
|
dst->duration = src->duration;
|
|
dst->is_network = src->is_network;
|
|
dst->is_streaming = src->is_streaming;
|
|
dst->stream_origin = src->stream_origin;
|
|
dst->priv = src->priv;
|
|
dst->metadata = mp_tags_dup(dst, src->metadata);
|
|
}
|
|
|
|
// Update metadata after initialization. If sh==NULL, it's global metadata,
|
|
// otherwise it's bound to the stream. If pts==NOPTS, use the highest known pts
|
|
// in the stream. Caller retains ownership of tags ptr. Called locked.
|
|
static void add_timed_metadata(struct demux_internal *in, struct mp_tags *tags,
|
|
struct sh_stream *sh, double pts)
|
|
{
|
|
struct demux_cached_range *r = in->current_range;
|
|
if (!r)
|
|
return;
|
|
|
|
// We don't expect this, nor do we find it useful.
|
|
if (sh && sh != in->metadata_stream)
|
|
return;
|
|
|
|
if (pts == MP_NOPTS_VALUE) {
|
|
for (int n = 0; n < r->num_streams; n++)
|
|
pts = MP_PTS_MAX(pts, r->streams[n]->last_ts);
|
|
|
|
// Tends to happen when doing the initial icy update.
|
|
if (pts == MP_NOPTS_VALUE)
|
|
pts = in->d_thread->start_time;
|
|
}
|
|
|
|
struct timed_metadata *tm = talloc_zero(NULL, struct timed_metadata);
|
|
*tm = (struct timed_metadata){
|
|
.pts = pts,
|
|
.tags = mp_tags_dup(tm, tags),
|
|
.from_stream = !!sh,
|
|
};
|
|
MP_TARRAY_APPEND(r, r->metadata, r->num_metadata, tm);
|
|
}
|
|
|
|
// This is called by demuxer implementations if sh->tags changed. Note that
|
|
// sh->tags itself is never actually changed (it's immutable, because sh->tags
|
|
// can be accessed by the playback thread, and there is no synchronization).
|
|
// pts is the time at/after which the metadata becomes effective. You're
|
|
// supposed to call this ordered by time, and only while a packet is being
|
|
// read.
|
|
// Ownership of tags goes to the function.
|
|
void demux_stream_tags_changed(struct demuxer *demuxer, struct sh_stream *sh,
|
|
struct mp_tags *tags, double pts)
|
|
{
|
|
struct demux_internal *in = demuxer->in;
|
|
assert(demuxer == in->d_thread);
|
|
struct demux_stream *ds = sh ? sh->ds : NULL;
|
|
assert(!sh || ds); // stream must have been added
|
|
|
|
pthread_mutex_lock(&in->lock);
|
|
|
|
if (pts == MP_NOPTS_VALUE) {
|
|
MP_WARN(in, "Discarding timed metadata without timestamp.\n");
|
|
} else {
|
|
add_timed_metadata(in, tags, sh, pts);
|
|
}
|
|
talloc_free(tags);
|
|
|
|
pthread_mutex_unlock(&in->lock);
|
|
}
|
|
|
|
// This is called by demuxer implementations if demuxer->metadata changed.
|
|
// (It will be propagated to the user as timed metadata.)
|
|
void demux_metadata_changed(demuxer_t *demuxer)
|
|
{
|
|
assert(demuxer == demuxer->in->d_thread); // call from demuxer impl. only
|
|
struct demux_internal *in = demuxer->in;
|
|
|
|
pthread_mutex_lock(&in->lock);
|
|
add_timed_metadata(in, demuxer->metadata, NULL, MP_NOPTS_VALUE);
|
|
pthread_mutex_unlock(&in->lock);
|
|
}
|
|
|
|
// Called locked, with user demuxer.
|
|
static void update_final_metadata(demuxer_t *demuxer, struct timed_metadata *tm)
|
|
{
|
|
assert(demuxer == demuxer->in->d_user);
|
|
struct demux_internal *in = demuxer->in;
|
|
|
|
struct mp_tags *dyn_tags = NULL;
|
|
|
|
// Often useful for audio-only files, which have metadata in the audio track
|
|
// metadata instead of the main metadata, but can also have cover art
|
|
// metadata (which libavformat likes to treat as video streams).
|
|
int astreams = 0;
|
|
int astream_id = -1;
|
|
int vstreams = 0;
|
|
for (int n = 0; n < in->num_streams; n++) {
|
|
struct sh_stream *sh = in->streams[n];
|
|
if (sh->type == STREAM_VIDEO && !sh->attached_picture)
|
|
vstreams += 1;
|
|
if (sh->type == STREAM_AUDIO) {
|
|
astreams += 1;
|
|
astream_id = n;
|
|
}
|
|
}
|
|
|
|
// Use the metadata_stream tags only if this really seems to be an audio-
|
|
// only stream. Otherwise it will happen too often that "uninteresting"
|
|
// stream metadata will trash the actual file tags.
|
|
if (vstreams == 0 && astreams == 1 &&
|
|
in->streams[astream_id] == in->metadata_stream)
|
|
{
|
|
dyn_tags = in->metadata_stream->tags;
|
|
if (tm && tm->from_stream)
|
|
dyn_tags = tm->tags;
|
|
}
|
|
|
|
// Global metadata updates.
|
|
if (tm && !tm->from_stream)
|
|
dyn_tags = tm->tags;
|
|
|
|
if (dyn_tags)
|
|
mp_tags_merge(demuxer->metadata, dyn_tags);
|
|
}
|
|
|
|
static struct timed_metadata *lookup_timed_metadata(struct demux_internal *in,
|
|
double pts)
|
|
{
|
|
struct demux_cached_range *r = in->current_range;
|
|
|
|
if (!r || !r->num_metadata || pts == MP_NOPTS_VALUE)
|
|
return NULL;
|
|
|
|
int start = 1;
|
|
int i = in->cached_metadata_index;
|
|
if (i >= 0 && i < r->num_metadata && r->metadata[i]->pts <= pts)
|
|
start = i + 1;
|
|
|
|
in->cached_metadata_index = r->num_metadata - 1;
|
|
for (int n = start; n < r->num_metadata; n++) {
|
|
if (r->metadata[n]->pts >= pts) {
|
|
in->cached_metadata_index = n - 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return r->metadata[in->cached_metadata_index];
|
|
}
|
|
|
|
// Called by the user thread (i.e. player) to update metadata and other things
|
|
// from the demuxer thread.
|
|
// The pts parameter is the current playback position.
|
|
void demux_update(demuxer_t *demuxer, double pts)
|
|
{
|
|
assert(demuxer == demuxer->in->d_user);
|
|
struct demux_internal *in = demuxer->in;
|
|
|
|
if (!in->threading)
|
|
update_cache(in);
|
|
|
|
pthread_mutex_lock(&in->lock);
|
|
|
|
pts = MP_ADD_PTS(pts, -in->ts_offset);
|
|
|
|
struct timed_metadata *prev = lookup_timed_metadata(in, in->last_playback_pts);
|
|
struct timed_metadata *cur = lookup_timed_metadata(in, pts);
|
|
if (prev != cur || in->force_metadata_update) {
|
|
in->force_metadata_update = false;
|
|
update_final_metadata(demuxer, cur);
|
|
demuxer->events |= DEMUX_EVENT_METADATA;
|
|
}
|
|
|
|
in->last_playback_pts = pts;
|
|
|
|
demuxer->events |= in->events;
|
|
in->events = 0;
|
|
if (demuxer->events & (DEMUX_EVENT_METADATA | DEMUX_EVENT_STREAMS))
|
|
demux_update_replaygain(demuxer);
|
|
if (demuxer->events & DEMUX_EVENT_DURATION)
|
|
demuxer->duration = in->duration;
|
|
|
|
pthread_mutex_unlock(&in->lock);
|
|
}
|
|
|
|
static void demux_init_cuesheet(struct demuxer *demuxer)
|
|
{
|
|
char *cue = mp_tags_get_str(demuxer->metadata, "cuesheet");
|
|
if (cue && !demuxer->num_chapters) {
|
|
struct cue_file *f = mp_parse_cue(bstr0(cue));
|
|
if (f) {
|
|
if (mp_check_embedded_cue(f) < 0) {
|
|
MP_WARN(demuxer, "Embedded cue sheet references more than one file. "
|
|
"Ignoring it.\n");
|
|
} else {
|
|
for (int n = 0; n < f->num_tracks; n++) {
|
|
struct cue_track *t = &f->tracks[n];
|
|
int idx = demuxer_add_chapter(demuxer, "", t->start, -1);
|
|
mp_tags_merge(demuxer->chapters[idx].metadata, t->tags);
|
|
}
|
|
}
|
|
}
|
|
talloc_free(f);
|
|
}
|
|
}
|
|
|
|
// A demuxer can use this during opening if all data was read from the stream.
|
|
// Calling this after opening was completed is not allowed. Also, if opening
|
|
// failed, this must not be called (or trying another demuxer would fail).
|
|
// Useful so that e.g. subtitles don't keep the file or socket open.
|
|
// If there's ever the situation where we can't allow the demuxer to close
|
|
// the stream, this function could ignore the request.
|
|
void demux_close_stream(struct demuxer *demuxer)
|
|
{
|
|
struct demux_internal *in = demuxer->in;
|
|
assert(!in->threading && demuxer == in->d_thread);
|
|
|
|
if (!demuxer->stream || !in->owns_stream)
|
|
return;
|
|
|
|
MP_VERBOSE(demuxer, "demuxer read all data; closing stream\n");
|
|
free_stream(demuxer->stream);
|
|
demuxer->stream = NULL;
|
|
in->d_user->stream = NULL;
|
|
}
|
|
|
|
static void demux_init_ccs(struct demuxer *demuxer, struct demux_opts *opts)
|
|
{
|
|
struct demux_internal *in = demuxer->in;
|
|
if (!opts->create_ccs)
|
|
return;
|
|
pthread_mutex_lock(&in->lock);
|
|
for (int n = 0; n < in->num_streams; n++) {
|
|
struct sh_stream *sh = in->streams[n];
|
|
if (sh->type == STREAM_VIDEO)
|
|
demuxer_get_cc_track_locked(sh);
|
|
}
|
|
pthread_mutex_unlock(&in->lock);
|
|
}
|
|
|
|
// Return whether "heavy" caching on this stream is enabled. By default, this
|
|
// corresponds to whether the source stream is considered in the network. The
|
|
// only effect should be adjusting display behavior (of cache stats etc.), and
|
|
// possibly switching between which set of options influence cache settings.
|
|
bool demux_is_network_cached(demuxer_t *demuxer)
|
|
{
|
|
struct demux_internal *in = demuxer->in;
|
|
pthread_mutex_lock(&in->lock);
|
|
bool r = in->using_network_cache_opts;
|
|
pthread_mutex_unlock(&in->lock);
|
|
return r;
|
|
}
|
|
|
|
struct parent_stream_info {
|
|
bool seekable;
|
|
bool is_network;
|
|
bool is_streaming;
|
|
int stream_origin;
|
|
struct mp_cancel *cancel;
|
|
char *filename;
|
|
};
|
|
|
|
static struct demuxer *open_given_type(struct mpv_global *global,
|
|
struct mp_log *log,
|
|
const struct demuxer_desc *desc,
|
|
struct stream *stream,
|
|
struct parent_stream_info *sinfo,
|
|
struct demuxer_params *params,
|
|
enum demux_check check)
|
|
{
|
|
if (mp_cancel_test(sinfo->cancel))
|
|
return NULL;
|
|
|
|
struct demuxer *demuxer = talloc_ptrtype(NULL, demuxer);
|
|
struct m_config_cache *opts_cache =
|
|
m_config_cache_alloc(demuxer, global, &demux_conf);
|
|
struct demux_opts *opts = opts_cache->opts;
|
|
*demuxer = (struct demuxer) {
|
|
.desc = desc,
|
|
.stream = stream,
|
|
.cancel = sinfo->cancel,
|
|
.seekable = sinfo->seekable,
|
|
.filepos = -1,
|
|
.global = global,
|
|
.log = mp_log_new(demuxer, log, desc->name),
|
|
.glog = log,
|
|
.filename = talloc_strdup(demuxer, sinfo->filename),
|
|
.is_network = sinfo->is_network,
|
|
.is_streaming = sinfo->is_streaming,
|
|
.stream_origin = sinfo->stream_origin,
|
|
.access_references = opts->access_references,
|
|
.events = DEMUX_EVENT_ALL,
|
|
.duration = -1,
|
|
};
|
|
|
|
struct demux_internal *in = demuxer->in = talloc_ptrtype(demuxer, in);
|
|
*in = (struct demux_internal){
|
|
.global = global,
|
|
.log = demuxer->log,
|
|
.can_cache = params && params->is_top_level,
|
|
.can_record = params && params->stream_record,
|
|
.opts = opts,
|
|
.opts_cache = opts_cache,
|
|
.d_thread = talloc(demuxer, struct demuxer),
|
|
.d_user = demuxer,
|
|
.after_seek = true, // (assumed identical to initial demuxer state)
|
|
.after_seek_to_start = true,
|
|
.highest_av_pts = MP_NOPTS_VALUE,
|
|
.seeking_in_progress = MP_NOPTS_VALUE,
|
|
.demux_ts = MP_NOPTS_VALUE,
|
|
.owns_stream = !params->external_stream,
|
|
};
|
|
pthread_mutex_init(&in->lock, NULL);
|
|
pthread_cond_init(&in->wakeup, NULL);
|
|
|
|
*in->d_thread = *demuxer;
|
|
|
|
in->d_thread->metadata = talloc_zero(in->d_thread, struct mp_tags);
|
|
|
|
mp_dbg(log, "Trying demuxer: %s (force-level: %s)\n",
|
|
desc->name, d_level(check));
|
|
|
|
if (stream)
|
|
stream_seek(stream, 0);
|
|
|
|
in->d_thread->params = params; // temporary during open()
|
|
int ret = demuxer->desc->open(in->d_thread, check);
|
|
if (ret >= 0) {
|
|
in->d_thread->params = NULL;
|
|
if (in->d_thread->filetype)
|
|
mp_verbose(log, "Detected file format: %s (%s)\n",
|
|
in->d_thread->filetype, desc->desc);
|
|
else
|
|
mp_verbose(log, "Detected file format: %s\n", desc->desc);
|
|
if (!in->d_thread->seekable)
|
|
mp_verbose(log, "Stream is not seekable.\n");
|
|
if (!in->d_thread->seekable && opts->force_seekable) {
|
|
mp_warn(log, "Not seekable, but enabling seeking on user request.\n");
|
|
in->d_thread->seekable = true;
|
|
in->d_thread->partially_seekable = true;
|
|
}
|
|
demux_init_cuesheet(in->d_thread);
|
|
demux_init_ccs(demuxer, opts);
|
|
demux_convert_tags_charset(in->d_thread);
|
|
demux_copy(in->d_user, in->d_thread);
|
|
in->duration = in->d_thread->duration;
|
|
demuxer_sort_chapters(demuxer);
|
|
in->events = DEMUX_EVENT_ALL;
|
|
|
|
struct demuxer *sub = NULL;
|
|
if (!(params && params->disable_timeline)) {
|
|
struct timeline *tl = timeline_load(global, log, demuxer);
|
|
if (tl) {
|
|
struct demuxer_params params2 = {0};
|
|
params2.timeline = tl;
|
|
params2.is_top_level = params && params->is_top_level;
|
|
params2.stream_record = params && params->stream_record;
|
|
sub =
|
|
open_given_type(global, log, &demuxer_desc_timeline,
|
|
NULL, sinfo, ¶ms2, DEMUX_CHECK_FORCE);
|
|
if (sub) {
|
|
in->can_cache = false;
|
|
in->can_record = false;
|
|
} else {
|
|
timeline_destroy(tl);
|
|
}
|
|
}
|
|
}
|
|
|
|
switch_to_fresh_cache_range(in);
|
|
|
|
update_opts(in);
|
|
|
|
demux_update(demuxer, MP_NOPTS_VALUE);
|
|
|
|
demuxer = sub ? sub : demuxer;
|
|
return demuxer;
|
|
}
|
|
|
|
demuxer->stream = NULL;
|
|
demux_free(demuxer);
|
|
return NULL;
|
|
}
|
|
|
|
static const int d_normal[] = {DEMUX_CHECK_NORMAL, DEMUX_CHECK_UNSAFE, -1};
|
|
static const int d_request[] = {DEMUX_CHECK_REQUEST, -1};
|
|
static const int d_force[] = {DEMUX_CHECK_FORCE, -1};
|
|
|
|
// params can be NULL
|
|
// This may free the stream parameter on success.
|
|
static struct demuxer *demux_open(struct stream *stream,
|
|
struct mp_cancel *cancel,
|
|
struct demuxer_params *params,
|
|
struct mpv_global *global)
|
|
{
|
|
const int *check_levels = d_normal;
|
|
const struct demuxer_desc *check_desc = NULL;
|
|
struct mp_log *log = mp_log_new(NULL, global->log, "!demux");
|
|
struct demuxer *demuxer = NULL;
|
|
char *force_format = params ? params->force_format : NULL;
|
|
|
|
if (!force_format)
|
|
force_format = stream->demuxer;
|
|
|
|
if (force_format && force_format[0] && !stream->is_directory) {
|
|
check_levels = d_request;
|
|
if (force_format[0] == '+') {
|
|
force_format += 1;
|
|
check_levels = d_force;
|
|
}
|
|
for (int n = 0; demuxer_list[n]; n++) {
|
|
if (strcmp(demuxer_list[n]->name, force_format) == 0)
|
|
check_desc = demuxer_list[n];
|
|
}
|
|
if (!check_desc) {
|
|
mp_err(log, "Demuxer %s does not exist.\n", force_format);
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
struct parent_stream_info sinfo = {
|
|
.seekable = stream->seekable,
|
|
.is_network = stream->is_network,
|
|
.is_streaming = stream->streaming,
|
|
.stream_origin = stream->stream_origin,
|
|
.cancel = cancel,
|
|
.filename = talloc_strdup(NULL, stream->url),
|
|
};
|
|
|
|
// Test demuxers from first to last, one pass for each check_levels[] entry
|
|
for (int pass = 0; check_levels[pass] != -1; pass++) {
|
|
enum demux_check level = check_levels[pass];
|
|
mp_verbose(log, "Trying demuxers for level=%s.\n", d_level(level));
|
|
for (int n = 0; demuxer_list[n]; n++) {
|
|
const struct demuxer_desc *desc = demuxer_list[n];
|
|
if (!check_desc || desc == check_desc) {
|
|
demuxer = open_given_type(global, log, desc, stream, &sinfo,
|
|
params, level);
|
|
if (demuxer) {
|
|
talloc_steal(demuxer, log);
|
|
log = NULL;
|
|
goto done;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
done:
|
|
talloc_free(sinfo.filename);
|
|
talloc_free(log);
|
|
return demuxer;
|
|
}
|
|
|
|
static struct stream *create_webshit_concat_stream(struct mpv_global *global,
|
|
struct mp_cancel *c,
|
|
bstr init, struct stream *real)
|
|
{
|
|
struct stream *mem = stream_memory_open(global, init.start, init.len);
|
|
assert(mem);
|
|
|
|
struct stream *streams[2] = {mem, real};
|
|
struct stream *concat = stream_concat_open(global, c, streams, 2);
|
|
if (!concat) {
|
|
free_stream(mem);
|
|
free_stream(real);
|
|
}
|
|
return concat;
|
|
}
|
|
|
|
// Convenience function: open the stream, enable the cache (according to params
|
|
// and global opts.), open the demuxer.
|
|
// Also for some reason may close the opened stream if it's not needed.
|
|
// demuxer->cancel is not the cancel parameter, but is its own object that will
|
|
// be a slave (mp_cancel_set_parent()) to provided cancel object.
|
|
// demuxer->cancel is automatically freed.
|
|
struct demuxer *demux_open_url(const char *url,
|
|
struct demuxer_params *params,
|
|
struct mp_cancel *cancel,
|
|
struct mpv_global *global)
|
|
{
|
|
if (!params)
|
|
return NULL;
|
|
struct mp_cancel *priv_cancel = mp_cancel_new(NULL);
|
|
if (cancel)
|
|
mp_cancel_set_parent(priv_cancel, cancel);
|
|
struct stream *s = params->external_stream;
|
|
if (!s) {
|
|
s = stream_create(url, STREAM_READ | params->stream_flags,
|
|
priv_cancel, global);
|
|
if (s && params->init_fragment.len) {
|
|
s = create_webshit_concat_stream(global, priv_cancel,
|
|
params->init_fragment, s);
|
|
}
|
|
}
|
|
if (!s) {
|
|
talloc_free(priv_cancel);
|
|
return NULL;
|
|
}
|
|
struct demuxer *d = demux_open(s, priv_cancel, params, global);
|
|
if (d) {
|
|
talloc_steal(d->in, priv_cancel);
|
|
assert(d->cancel);
|
|
} else {
|
|
params->demuxer_failed = true;
|
|
if (!params->external_stream)
|
|
free_stream(s);
|
|
talloc_free(priv_cancel);
|
|
}
|
|
return d;
|
|
}
|
|
|
|
// clear the packet queues
|
|
void demux_flush(demuxer_t *demuxer)
|
|
{
|
|
struct demux_internal *in = demuxer->in;
|
|
assert(demuxer == in->d_user);
|
|
|
|
pthread_mutex_lock(&demuxer->in->lock);
|
|
clear_reader_state(in, true);
|
|
for (int n = 0; n < in->num_ranges; n++)
|
|
clear_cached_range(in, in->ranges[n]);
|
|
free_empty_cached_ranges(in);
|
|
pthread_mutex_unlock(&demuxer->in->lock);
|
|
}
|
|
|
|
// Does some (but not all) things for switching to another range.
|
|
static void switch_current_range(struct demux_internal *in,
|
|
struct demux_cached_range *range)
|
|
{
|
|
struct demux_cached_range *old = in->current_range;
|
|
assert(old != range);
|
|
|
|
set_current_range(in, range);
|
|
|
|
if (old) {
|
|
// Remove packets which can't be used when seeking back to the range.
|
|
for (int n = 0; n < in->num_streams; n++) {
|
|
struct demux_queue *queue = old->streams[n];
|
|
|
|
// Remove all packets which cannot be involved in seeking.
|
|
while (queue->head && !queue->head->keyframe)
|
|
remove_head_packet(queue);
|
|
}
|
|
|
|
// Exclude weird corner cases that break resuming.
|
|
for (int n = 0; n < in->num_streams; n++) {
|
|
struct demux_stream *ds = in->streams[n]->ds;
|
|
// This is needed to resume or join the range at all.
|
|
if (ds->selected && !(ds->global_correct_dts ||
|
|
ds->global_correct_pos))
|
|
{
|
|
MP_VERBOSE(in, "discarding unseekable range due to stream %d\n", n);
|
|
clear_cached_range(in, old);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Set up reading from new range (as well as writing to it).
|
|
for (int n = 0; n < in->num_streams; n++) {
|
|
struct demux_stream *ds = in->streams[n]->ds;
|
|
|
|
ds->queue = range->streams[n];
|
|
ds->refreshing = false;
|
|
ds->eof = false;
|
|
}
|
|
|
|
// No point in keeping any junk (especially if old current_range is empty).
|
|
free_empty_cached_ranges(in);
|
|
|
|
// The change detection doesn't work across ranges.
|
|
in->force_metadata_update = true;
|
|
}
|
|
|
|
// Search for the entry with the highest index with entry.pts <= pts true.
|
|
static struct demux_packet *search_index(struct demux_queue *queue, double pts)
|
|
{
|
|
size_t a = 0;
|
|
size_t b = queue->num_index;
|
|
|
|
while (a < b) {
|
|
size_t m = a + (b - a) / 2;
|
|
struct index_entry *e = &QUEUE_INDEX_ENTRY(queue, m);
|
|
|
|
bool m_ok = e->pts <= pts;
|
|
|
|
if (a + 1 == b)
|
|
return m_ok ? e->pkt : NULL;
|
|
|
|
if (m_ok) {
|
|
a = m;
|
|
} else {
|
|
b = m;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static struct demux_packet *find_seek_target(struct demux_queue *queue,
|
|
double pts, int flags)
|
|
{
|
|
pts -= queue->ds->sh->seek_preroll;
|
|
|
|
struct demux_packet *start = search_index(queue, pts);
|
|
if (!start)
|
|
start = queue->head;
|
|
|
|
struct demux_packet *target = NULL;
|
|
struct demux_packet *next = NULL;
|
|
for (struct demux_packet *dp = start; dp; dp = next) {
|
|
next = dp->next;
|
|
if (!dp->keyframe)
|
|
continue;
|
|
|
|
double range_pts;
|
|
next = compute_keyframe_times(dp, &range_pts, NULL);
|
|
|
|
if (range_pts == MP_NOPTS_VALUE)
|
|
continue;
|
|
|
|
if (flags & SEEK_FORWARD) {
|
|
// Stop on the first packet that is >= pts.
|
|
if (target)
|
|
break;
|
|
if (range_pts < pts)
|
|
continue;
|
|
} else {
|
|
// Stop before the first packet that is > pts.
|
|
// This still returns a packet with > pts if there's no better one.
|
|
if (target && range_pts > pts)
|
|
break;
|
|
}
|
|
|
|
target = dp;
|
|
}
|
|
|
|
return target;
|
|
}
|
|
|
|
// Return a cache range for the given pts/flags, or NULL if none available.
|
|
// must be called locked
|
|
static struct demux_cached_range *find_cache_seek_range(struct demux_internal *in,
|
|
double pts, int flags)
|
|
{
|
|
// Note about queued low level seeks: in->seeking can be true here, and it
|
|
// might come from a previous resume seek to the current range. If we end
|
|
// up seeking into the current range (i.e. just changing time offset), the
|
|
// seek needs to continue. Otherwise, we override the queued seek anyway.
|
|
if ((flags & SEEK_FACTOR) || !in->seekable_cache)
|
|
return NULL;
|
|
|
|
struct demux_cached_range *res = NULL;
|
|
|
|
for (int n = 0; n < in->num_ranges; n++) {
|
|
struct demux_cached_range *r = in->ranges[n];
|
|
if (r->seek_start != MP_NOPTS_VALUE) {
|
|
MP_VERBOSE(in, "cached range %d: %f <-> %f (bof=%d, eof=%d)\n",
|
|
n, r->seek_start, r->seek_end, r->is_bof, r->is_eof);
|
|
|
|
if ((pts >= r->seek_start || r->is_bof) &&
|
|
(pts <= r->seek_end || r->is_eof))
|
|
{
|
|
MP_VERBOSE(in, "...using this range for in-cache seek.\n");
|
|
res = r;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
// Adjust the seek target to the found video key frames. Otherwise the
|
|
// video will undershoot the seek target, while audio will be closer to it.
|
|
// The player frontend will play the additional video without audio, so
|
|
// you get silent audio for the amount of "undershoot". Adjusting the seek
|
|
// target will make the audio seek to the video target or before.
|
|
// (If hr-seeks are used, it's better to skip this, as it would only mean
|
|
// that more audio data than necessary would have to be decoded.)
|
|
static void adjust_cache_seek_target(struct demux_internal *in,
|
|
struct demux_cached_range *range,
|
|
double *pts, int *flags)
|
|
{
|
|
if (*flags & SEEK_HR)
|
|
return;
|
|
|
|
for (int n = 0; n < in->num_streams; n++) {
|
|
struct demux_stream *ds = in->streams[n]->ds;
|
|
struct demux_queue *queue = range->streams[n];
|
|
if (ds->selected && ds->type == STREAM_VIDEO) {
|
|
struct demux_packet *target = find_seek_target(queue, *pts, *flags);
|
|
if (target) {
|
|
double target_pts;
|
|
compute_keyframe_times(target, &target_pts, NULL);
|
|
if (target_pts != MP_NOPTS_VALUE) {
|
|
MP_VERBOSE(in, "adjust seek target %f -> %f\n",
|
|
*pts, target_pts);
|
|
// (We assume the find_seek_target() call will return
|
|
// the same target for the video stream.)
|
|
*pts = target_pts;
|
|
*flags &= ~SEEK_FORWARD;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// must be called locked
|
|
// range must be non-NULL and from find_cache_seek_range() using the same pts
|
|
// and flags, before any other changes to the cached state
|
|
static void execute_cache_seek(struct demux_internal *in,
|
|
struct demux_cached_range *range,
|
|
double pts, int flags)
|
|
{
|
|
adjust_cache_seek_target(in, range, &pts, &flags);
|
|
|
|
for (int n = 0; n < in->num_streams; n++) {
|
|
struct demux_stream *ds = in->streams[n]->ds;
|
|
struct demux_queue *queue = range->streams[n];
|
|
|
|
struct demux_packet *target = find_seek_target(queue, pts, flags);
|
|
ds->reader_head = target;
|
|
ds->skip_to_keyframe = !target;
|
|
if (ds->reader_head)
|
|
ds->base_ts = MP_PTS_OR_DEF(ds->reader_head->pts, ds->reader_head->dts);
|
|
|
|
MP_VERBOSE(in, "seeking stream %d (%s) to ",
|
|
n, stream_type_name(ds->type));
|
|
|
|
if (target) {
|
|
MP_VERBOSE(in, "packet %f/%f\n", target->pts, target->dts);
|
|
} else {
|
|
MP_VERBOSE(in, "nothing\n");
|
|
}
|
|
}
|
|
|
|
// If we seek to another range, we want to seek the low level demuxer to
|
|
// there as well, because reader and demuxer queue must be the same.
|
|
if (in->current_range != range) {
|
|
switch_current_range(in, range);
|
|
|
|
in->seeking = true;
|
|
in->seek_flags = SEEK_HR;
|
|
in->seek_pts = range->seek_end - 1.0;
|
|
|
|
// When new packets are being appended, they could overlap with the old
|
|
// range due to demuxer seek imprecisions, or because the queue contains
|
|
// packets past the seek target but before the next seek target. Don't
|
|
// append them twice, instead skip them until new packets are found.
|
|
for (int n = 0; n < in->num_streams; n++) {
|
|
struct demux_stream *ds = in->streams[n]->ds;
|
|
|
|
ds->refreshing = ds->selected;
|
|
}
|
|
|
|
MP_VERBOSE(in, "resuming demuxer to end of cached range\n");
|
|
}
|
|
}
|
|
|
|
// Create a new blank cache range, and backup the old one. If the seekable
|
|
// demuxer cache is disabled, merely reset the current range to a blank state.
|
|
static void switch_to_fresh_cache_range(struct demux_internal *in)
|
|
{
|
|
if (!in->seekable_cache && in->current_range) {
|
|
clear_cached_range(in, in->current_range);
|
|
return;
|
|
}
|
|
|
|
struct demux_cached_range *range = talloc_ptrtype(NULL, range);
|
|
*range = (struct demux_cached_range){
|
|
.seek_start = MP_NOPTS_VALUE,
|
|
.seek_end = MP_NOPTS_VALUE,
|
|
};
|
|
MP_TARRAY_APPEND(in, in->ranges, in->num_ranges, range);
|
|
add_missing_streams(in, range);
|
|
|
|
switch_current_range(in, range);
|
|
}
|
|
|
|
int demux_seek(demuxer_t *demuxer, double seek_pts, int flags)
|
|
{
|
|
struct demux_internal *in = demuxer->in;
|
|
assert(demuxer == in->d_user);
|
|
|
|
pthread_mutex_lock(&in->lock);
|
|
|
|
if (!(flags & SEEK_FACTOR))
|
|
seek_pts = MP_ADD_PTS(seek_pts, -in->ts_offset);
|
|
|
|
int res = queue_seek(in, seek_pts, flags, true);
|
|
|
|
pthread_cond_signal(&in->wakeup);
|
|
pthread_mutex_unlock(&in->lock);
|
|
|
|
return res;
|
|
}
|
|
|
|
static bool queue_seek(struct demux_internal *in, double seek_pts, int flags,
|
|
bool clear_back_state)
|
|
{
|
|
if (seek_pts == MP_NOPTS_VALUE)
|
|
return false;
|
|
|
|
MP_VERBOSE(in, "queuing seek to %f%s\n", seek_pts,
|
|
in->seeking ? " (cascade)" : "");
|
|
|
|
bool require_cache = flags & SEEK_CACHED;
|
|
flags &= ~(unsigned)SEEK_CACHED;
|
|
|
|
bool set_backwards = flags & SEEK_SATAN;
|
|
flags &= ~(unsigned)SEEK_SATAN;
|
|
|
|
bool force_seek = flags & SEEK_FORCE;
|
|
flags &= ~(unsigned)SEEK_FORCE;
|
|
|
|
struct demux_cached_range *cache_target =
|
|
find_cache_seek_range(in, seek_pts, flags);
|
|
|
|
if (!cache_target) {
|
|
if (require_cache) {
|
|
MP_VERBOSE(in, "Cached seek not possible.\n");
|
|
return false;
|
|
}
|
|
if (!in->d_thread->seekable && !force_seek) {
|
|
MP_WARN(in, "Cannot seek in this file.\n");
|
|
return false;
|
|
}
|
|
}
|
|
|
|
in->eof = false;
|
|
in->idle = true;
|
|
in->reading = false;
|
|
in->back_demuxing = set_backwards;
|
|
|
|
clear_reader_state(in, clear_back_state);
|
|
|
|
if (cache_target) {
|
|
execute_cache_seek(in, cache_target, seek_pts, flags);
|
|
} else {
|
|
switch_to_fresh_cache_range(in);
|
|
|
|
in->seeking = true;
|
|
in->seek_flags = flags;
|
|
in->seek_pts = seek_pts;
|
|
}
|
|
|
|
for (int n = 0; n < in->num_streams; n++) {
|
|
struct demux_stream *ds = in->streams[n]->ds;
|
|
|
|
if (in->back_demuxing) {
|
|
if (ds->back_seek_pos == MP_NOPTS_VALUE)
|
|
ds->back_seek_pos = seek_pts;
|
|
// Process possibly cached packets.
|
|
back_demux_see_packets(in->streams[n]->ds);
|
|
}
|
|
|
|
wakeup_ds(ds);
|
|
}
|
|
|
|
if (!in->threading && in->seeking)
|
|
execute_seek(in);
|
|
|
|
return true;
|
|
}
|
|
|
|
struct sh_stream *demuxer_stream_by_demuxer_id(struct demuxer *d,
|
|
enum stream_type t, int id)
|
|
{
|
|
if (id < 0)
|
|
return NULL;
|
|
int num = demux_get_num_stream(d);
|
|
for (int n = 0; n < num; n++) {
|
|
struct sh_stream *s = demux_get_stream(d, n);
|
|
if (s->type == t && s->demuxer_id == id)
|
|
return s;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
// An obscure mechanism to get stream switching to be executed "faster" (as
|
|
// perceived by the user), by making the stream return packets from the
|
|
// current position
|
|
// On a switch, it seeks back, and then grabs all packets that were
|
|
// "missing" from the packet queue of the newly selected stream.
|
|
static void initiate_refresh_seek(struct demux_internal *in,
|
|
struct demux_stream *stream,
|
|
double start_ts)
|
|
{
|
|
struct demuxer *demux = in->d_thread;
|
|
bool seekable = demux->desc->seek && demux->seekable &&
|
|
!demux->partially_seekable;
|
|
|
|
bool normal_seek = true;
|
|
bool refresh_possible = true;
|
|
for (int n = 0; n < in->num_streams; n++) {
|
|
struct demux_stream *ds = in->streams[n]->ds;
|
|
|
|
if (!ds->selected)
|
|
continue;
|
|
|
|
if (ds->type == STREAM_VIDEO || ds->type == STREAM_AUDIO)
|
|
start_ts = MP_PTS_MIN(start_ts, ds->base_ts);
|
|
|
|
// If there were no other streams selected, we can use a normal seek.
|
|
normal_seek &= stream == ds;
|
|
|
|
refresh_possible &= ds->queue->correct_dts || ds->queue->correct_pos;
|
|
}
|
|
|
|
if (start_ts == MP_NOPTS_VALUE || !seekable)
|
|
return;
|
|
|
|
if (!normal_seek) {
|
|
if (!refresh_possible) {
|
|
MP_VERBOSE(in, "can't issue refresh seek\n");
|
|
return;
|
|
}
|
|
|
|
for (int n = 0; n < in->num_streams; n++) {
|
|
struct demux_stream *ds = in->streams[n]->ds;
|
|
|
|
bool correct_pos = ds->queue->correct_pos;
|
|
bool correct_dts = ds->queue->correct_dts;
|
|
|
|
// We need to re-read all packets anyway, so discard the buffered
|
|
// data. (In theory, we could keep the packets, and be able to use
|
|
// it for seeking if partially read streams are deselected again,
|
|
// but this causes other problems like queue overflows when
|
|
// selecting a new stream.)
|
|
ds_clear_reader_queue_state(ds);
|
|
clear_queue(ds->queue);
|
|
|
|
// Streams which didn't have any packets yet will return all packets,
|
|
// other streams return packets only starting from the last position.
|
|
if (ds->selected && (ds->last_ret_pos != -1 ||
|
|
ds->last_ret_dts != MP_NOPTS_VALUE))
|
|
{
|
|
ds->refreshing = true;
|
|
ds->queue->correct_dts = correct_dts;
|
|
ds->queue->correct_pos = correct_pos;
|
|
ds->queue->last_pos = ds->last_ret_pos;
|
|
ds->queue->last_dts = ds->last_ret_dts;
|
|
}
|
|
|
|
update_seek_ranges(in->current_range);
|
|
}
|
|
|
|
start_ts -= 1.0; // small offset to get correct overlap
|
|
}
|
|
|
|
MP_VERBOSE(in, "refresh seek to %f\n", start_ts);
|
|
in->seeking = true;
|
|
in->seek_flags = SEEK_HR;
|
|
in->seek_pts = start_ts;
|
|
}
|
|
|
|
// Set whether the given stream should return packets.
|
|
// ref_pts is used only if the stream is enabled. Then it serves as approximate
|
|
// start pts for this stream (in the worst case it is ignored).
|
|
void demuxer_select_track(struct demuxer *demuxer, struct sh_stream *stream,
|
|
double ref_pts, bool selected)
|
|
{
|
|
struct demux_internal *in = demuxer->in;
|
|
struct demux_stream *ds = stream->ds;
|
|
pthread_mutex_lock(&in->lock);
|
|
ref_pts = MP_ADD_PTS(ref_pts, -in->ts_offset);
|
|
// don't flush buffers if stream is already selected / unselected
|
|
if (ds->selected != selected) {
|
|
MP_VERBOSE(in, "%sselect track %d\n", selected ? "" : "de", stream->index);
|
|
ds->selected = selected;
|
|
update_stream_selection_state(in, ds);
|
|
in->tracks_switched = true;
|
|
if (ds->selected) {
|
|
if (in->back_demuxing)
|
|
ds->back_seek_pos = ref_pts;
|
|
if (!in->after_seek)
|
|
initiate_refresh_seek(in, ds, ref_pts);
|
|
}
|
|
if (in->threading) {
|
|
pthread_cond_signal(&in->wakeup);
|
|
} else {
|
|
execute_trackswitch(in);
|
|
}
|
|
}
|
|
pthread_mutex_unlock(&in->lock);
|
|
}
|
|
|
|
// This is for demuxer implementations only. demuxer_select_track() sets the
|
|
// logical state, while this function returns the actual state (in case the
|
|
// demuxer attempts to cache even unselected packets for track switching - this
|
|
// will potentially be done in the future).
|
|
bool demux_stream_is_selected(struct sh_stream *stream)
|
|
{
|
|
if (!stream)
|
|
return false;
|
|
bool r = false;
|
|
pthread_mutex_lock(&stream->ds->in->lock);
|
|
r = stream->ds->selected;
|
|
pthread_mutex_unlock(&stream->ds->in->lock);
|
|
return r;
|
|
}
|
|
|
|
void demux_set_stream_wakeup_cb(struct sh_stream *sh,
|
|
void (*cb)(void *ctx), void *ctx)
|
|
{
|
|
pthread_mutex_lock(&sh->ds->in->lock);
|
|
sh->ds->wakeup_cb = cb;
|
|
sh->ds->wakeup_cb_ctx = ctx;
|
|
sh->ds->need_wakeup = true;
|
|
pthread_mutex_unlock(&sh->ds->in->lock);
|
|
}
|
|
|
|
int demuxer_add_attachment(demuxer_t *demuxer, char *name, char *type,
|
|
void *data, size_t data_size)
|
|
{
|
|
if (!(demuxer->num_attachments % 32))
|
|
demuxer->attachments = talloc_realloc(demuxer, demuxer->attachments,
|
|
struct demux_attachment,
|
|
demuxer->num_attachments + 32);
|
|
|
|
struct demux_attachment *att = &demuxer->attachments[demuxer->num_attachments];
|
|
att->name = talloc_strdup(demuxer->attachments, name);
|
|
att->type = talloc_strdup(demuxer->attachments, type);
|
|
att->data = talloc_memdup(demuxer->attachments, data, data_size);
|
|
att->data_size = data_size;
|
|
|
|
return demuxer->num_attachments++;
|
|
}
|
|
|
|
static int chapter_compare(const void *p1, const void *p2)
|
|
{
|
|
struct demux_chapter *c1 = (void *)p1;
|
|
struct demux_chapter *c2 = (void *)p2;
|
|
|
|
if (c1->pts > c2->pts)
|
|
return 1;
|
|
else if (c1->pts < c2->pts)
|
|
return -1;
|
|
return c1->original_index > c2->original_index ? 1 :-1; // never equal
|
|
}
|
|
|
|
static void demuxer_sort_chapters(demuxer_t *demuxer)
|
|
{
|
|
if (demuxer->num_chapters) {
|
|
qsort(demuxer->chapters, demuxer->num_chapters,
|
|
sizeof(struct demux_chapter), chapter_compare);
|
|
}
|
|
}
|
|
|
|
int demuxer_add_chapter(demuxer_t *demuxer, char *name,
|
|
double pts, uint64_t demuxer_id)
|
|
{
|
|
struct demux_chapter new = {
|
|
.original_index = demuxer->num_chapters,
|
|
.pts = pts,
|
|
.metadata = talloc_zero(demuxer, struct mp_tags),
|
|
.demuxer_id = demuxer_id,
|
|
};
|
|
mp_tags_set_str(new.metadata, "TITLE", name);
|
|
MP_TARRAY_APPEND(demuxer, demuxer->chapters, demuxer->num_chapters, new);
|
|
return demuxer->num_chapters - 1;
|
|
}
|
|
|
|
// Disallow reading any packets and make readers think there is no new data
|
|
// yet, until a seek is issued.
|
|
void demux_block_reading(struct demuxer *demuxer, bool block)
|
|
{
|
|
struct demux_internal *in = demuxer->in;
|
|
assert(demuxer == in->d_user);
|
|
|
|
pthread_mutex_lock(&in->lock);
|
|
in->blocked = block;
|
|
for (int n = 0; n < in->num_streams; n++) {
|
|
in->streams[n]->ds->need_wakeup = true;
|
|
wakeup_ds(in->streams[n]->ds);
|
|
}
|
|
pthread_cond_signal(&in->wakeup);
|
|
pthread_mutex_unlock(&in->lock);
|
|
}
|
|
|
|
static void update_bytes_read(struct demux_internal *in)
|
|
{
|
|
struct demuxer *demuxer = in->d_thread;
|
|
|
|
int64_t new = in->slave_unbuffered_read_bytes;
|
|
in->slave_unbuffered_read_bytes = 0;
|
|
|
|
int64_t new_seeks = 0;
|
|
|
|
struct stream *stream = demuxer->stream;
|
|
if (stream) {
|
|
new += stream->total_unbuffered_read_bytes;
|
|
stream->total_unbuffered_read_bytes = 0;
|
|
new_seeks += stream->total_stream_seeks;
|
|
stream->total_stream_seeks = 0;
|
|
}
|
|
|
|
in->cache_unbuffered_read_bytes += new;
|
|
in->hack_unbuffered_read_bytes += new;
|
|
in->byte_level_seeks += new_seeks;
|
|
}
|
|
|
|
// must be called not locked
|
|
static void update_cache(struct demux_internal *in)
|
|
{
|
|
struct demuxer *demuxer = in->d_thread;
|
|
struct stream *stream = demuxer->stream;
|
|
|
|
// Don't lock while querying the stream.
|
|
struct mp_tags *stream_metadata = NULL;
|
|
|
|
int64_t stream_size = -1;
|
|
if (stream) {
|
|
stream_size = stream_get_size(stream);
|
|
stream_control(stream, STREAM_CTRL_GET_METADATA, &stream_metadata);
|
|
}
|
|
|
|
update_bytes_read(in);
|
|
|
|
pthread_mutex_lock(&in->lock);
|
|
|
|
in->stream_size = stream_size;
|
|
if (stream_metadata) {
|
|
add_timed_metadata(in, stream_metadata, NULL, MP_NOPTS_VALUE);
|
|
talloc_free(stream_metadata);
|
|
}
|
|
|
|
in->next_cache_update = INT64_MAX;
|
|
|
|
int64_t now = mp_time_us();
|
|
int64_t diff = now - in->last_speed_query;
|
|
if (diff >= MP_SECOND_US) {
|
|
uint64_t bytes = in->cache_unbuffered_read_bytes;
|
|
in->cache_unbuffered_read_bytes = 0;
|
|
in->last_speed_query = now;
|
|
in->bytes_per_second = bytes / (diff / (double)MP_SECOND_US);
|
|
}
|
|
// The idea is to update as long as there is "activity".
|
|
if (in->bytes_per_second)
|
|
in->next_cache_update = now + MP_SECOND_US + 1;
|
|
|
|
pthread_mutex_unlock(&in->lock);
|
|
}
|
|
|
|
static void dumper_close(struct demux_internal *in)
|
|
{
|
|
if (in->dumper)
|
|
mp_recorder_destroy(in->dumper);
|
|
in->dumper = NULL;
|
|
if (in->dumper_status == CONTROL_TRUE)
|
|
in->dumper_status = CONTROL_FALSE; // make abort equal to success
|
|
}
|
|
|
|
static int range_time_compare(const void *p1, const void *p2)
|
|
{
|
|
struct demux_cached_range *r1 = (void *)p1;
|
|
struct demux_cached_range *r2 = (void *)p2;
|
|
|
|
if (r1->seek_start == r2->seek_start)
|
|
return 0;
|
|
return r1->seek_start < r2->seek_start ? -1 : 1;
|
|
}
|
|
|
|
static void dump_cache(struct demux_internal *in, double start, double end)
|
|
{
|
|
in->dumper_status = in->dumper ? CONTROL_TRUE : CONTROL_ERROR;
|
|
if (!in->dumper)
|
|
return;
|
|
|
|
// (only in pathological cases there might be more ranges than allowed)
|
|
struct demux_cached_range *ranges[MAX_SEEK_RANGES];
|
|
int num_ranges = 0;
|
|
for (int n = 0; n < MPMIN(MP_ARRAY_SIZE(ranges), in->num_ranges); n++)
|
|
ranges[num_ranges++] = in->ranges[n];
|
|
qsort(ranges, num_ranges, sizeof(ranges[0]), range_time_compare);
|
|
|
|
for (int n = 0; n < num_ranges; n++) {
|
|
struct demux_cached_range *r = ranges[n];
|
|
if (r->seek_start == MP_NOPTS_VALUE)
|
|
continue;
|
|
if (r->seek_end <= start)
|
|
continue;
|
|
if (end != MP_NOPTS_VALUE && r->seek_start >= end)
|
|
continue;
|
|
|
|
mp_recorder_mark_discontinuity(in->dumper);
|
|
|
|
double pts = start;
|
|
int flags = 0;
|
|
adjust_cache_seek_target(in, r, &pts, &flags);
|
|
|
|
for (int i = 0; i < r->num_streams; i++) {
|
|
struct demux_queue *q = r->streams[i];
|
|
struct demux_stream *ds = q->ds;
|
|
|
|
ds->dump_pos = find_seek_target(q, pts, flags);
|
|
}
|
|
|
|
// We need to reinterleave the separate streams somehow, which makes
|
|
// everything more complex.
|
|
while (1) {
|
|
struct demux_packet *next = NULL;
|
|
double next_dts = MP_NOPTS_VALUE;
|
|
|
|
for (int i = 0; i < r->num_streams; i++) {
|
|
struct demux_stream *ds = r->streams[i]->ds;
|
|
struct demux_packet *dp = ds->dump_pos;
|
|
|
|
if (!dp)
|
|
continue;
|
|
assert(dp->stream == ds->index);
|
|
|
|
double pdts = MP_PTS_OR_DEF(dp->dts, dp->pts);
|
|
|
|
// Check for stream EOF. Note that we don't try to EOF
|
|
// streams at the same point (e.g. video can take longer
|
|
// to finish than audio, so the output file will have no
|
|
// audio for the last part of the video). Too much effort.
|
|
if (pdts != MP_NOPTS_VALUE && end != MP_NOPTS_VALUE &&
|
|
pdts >= end && dp->keyframe)
|
|
{
|
|
ds->dump_pos = NULL;
|
|
continue;
|
|
}
|
|
|
|
if (pdts == MP_NOPTS_VALUE || next_dts == MP_NOPTS_VALUE ||
|
|
pdts < next_dts)
|
|
{
|
|
next_dts = pdts;
|
|
next = dp;
|
|
}
|
|
}
|
|
|
|
if (!next)
|
|
break;
|
|
|
|
struct demux_stream *ds = in->streams[next->stream]->ds;
|
|
ds->dump_pos = next->next;
|
|
|
|
struct demux_packet *dp = read_packet_from_cache(in, next);
|
|
if (!dp) {
|
|
in->dumper_status = CONTROL_ERROR;
|
|
break;
|
|
}
|
|
|
|
write_dump_packet(in, dp);
|
|
|
|
talloc_free(dp);
|
|
}
|
|
|
|
if (in->dumper_status != CONTROL_OK)
|
|
break;
|
|
}
|
|
|
|
// (strictly speaking unnecessary; for clarity)
|
|
for (int n = 0; n < in->num_streams; n++)
|
|
in->streams[n]->ds->dump_pos = NULL;
|
|
|
|
// If dumping (in end==NOPTS mode) doesn't continue at the range that
|
|
// was written last, we have a discontinuity.
|
|
if (num_ranges && ranges[num_ranges - 1] != in->current_range)
|
|
mp_recorder_mark_discontinuity(in->dumper);
|
|
|
|
// end=NOPTS means the demuxer output continues to be written to the
|
|
// dump file.
|
|
if (end != MP_NOPTS_VALUE || in->dumper_status != CONTROL_OK)
|
|
dumper_close(in);
|
|
}
|
|
|
|
// Set the current cache dumping mode. There is only at most 1 dump process
|
|
// active, so calling this aborts the previous dumping. Passing file==NULL
|
|
// stops dumping.
|
|
// This is synchronous with demux_cache_dump_get_status() (i.e. starting or
|
|
// aborting is not asynchronous). On status change, the demuxer wakeup callback
|
|
// is invoked (except for this call).
|
|
// Returns whether dumping was logically started.
|
|
bool demux_cache_dump_set(struct demuxer *demuxer, double start, double end,
|
|
char *file)
|
|
{
|
|
struct demux_internal *in = demuxer->in;
|
|
assert(demuxer == in->d_user);
|
|
|
|
bool res = false;
|
|
|
|
pthread_mutex_lock(&in->lock);
|
|
|
|
start = MP_ADD_PTS(start, -in->ts_offset);
|
|
end = MP_ADD_PTS(end, -in->ts_offset);
|
|
|
|
dumper_close(in);
|
|
|
|
if (file && file[0] && start != MP_NOPTS_VALUE) {
|
|
res = true;
|
|
|
|
in->dumper = recorder_create(in, file);
|
|
|
|
// This is not asynchronous and will freeze the shit for a while if the
|
|
// user is unlucky. It could be moved to a thread with some effort.
|
|
// General idea: iterate over all cache ranges, dump what intersects.
|
|
// After that, and if the user requested it, make it dump all newly
|
|
// received packets, even if it's awkward (consider the case if the
|
|
// current range is not the last range).
|
|
dump_cache(in, start, end);
|
|
}
|
|
|
|
pthread_mutex_unlock(&in->lock);
|
|
|
|
return res;
|
|
}
|
|
|
|
// Returns one of CONTROL_*. CONTROL_TRUE means dumping is in progress.
|
|
int demux_cache_dump_get_status(struct demuxer *demuxer)
|
|
{
|
|
struct demux_internal *in = demuxer->in;
|
|
pthread_mutex_lock(&in->lock);
|
|
int status = in->dumper_status;
|
|
pthread_mutex_unlock(&in->lock);
|
|
return status;
|
|
}
|
|
|
|
// Return what range demux_cache_dump_set() would (probably) yield. This is a
|
|
// conservative amount (in addition to internal consistency of this code, it
|
|
// depends on what a player will do with the resulting file).
|
|
// Use for_end==true to get the end of dumping, other the start.
|
|
// Returns NOPTS if nothing was found.
|
|
double demux_probe_cache_dump_target(struct demuxer *demuxer, double pts,
|
|
bool for_end)
|
|
{
|
|
struct demux_internal *in = demuxer->in;
|
|
assert(demuxer == in->d_user);
|
|
|
|
double res = MP_NOPTS_VALUE;
|
|
if (pts == MP_NOPTS_VALUE)
|
|
return pts;
|
|
|
|
pthread_mutex_lock(&in->lock);
|
|
|
|
pts = MP_ADD_PTS(pts, -in->ts_offset);
|
|
|
|
// (When determining the end, look before the keyframe at pts, so subtract
|
|
// an arbitrary amount to round down.)
|
|
double seek_pts = for_end ? pts - 0.001 : pts;
|
|
int flags = 0;
|
|
struct demux_cached_range *r = find_cache_seek_range(in, seek_pts, flags);
|
|
if (r) {
|
|
if (!for_end)
|
|
adjust_cache_seek_target(in, r, &pts, &flags);
|
|
|
|
double t[STREAM_TYPE_COUNT];
|
|
for (int n = 0; n < STREAM_TYPE_COUNT; n++)
|
|
t[n] = MP_NOPTS_VALUE;
|
|
|
|
for (int n = 0; n < in->num_streams; n++) {
|
|
struct demux_stream *ds = in->streams[n]->ds;
|
|
struct demux_queue *q = r->streams[n];
|
|
|
|
struct demux_packet *dp = find_seek_target(q, pts, flags);
|
|
if (dp) {
|
|
if (for_end) {
|
|
while (dp) {
|
|
double pdts = MP_PTS_OR_DEF(dp->dts, dp->pts);
|
|
|
|
if (pdts != MP_NOPTS_VALUE && pdts >= pts && dp->keyframe)
|
|
break;
|
|
|
|
t[ds->type] = MP_PTS_MAX(t[ds->type], pdts);
|
|
|
|
dp = dp->next;
|
|
}
|
|
} else {
|
|
double start;
|
|
compute_keyframe_times(dp, &start, NULL);
|
|
start = MP_PTS_MAX(start, r->seek_start);
|
|
t[ds->type] = MP_PTS_MAX(t[ds->type], start);
|
|
}
|
|
}
|
|
}
|
|
|
|
res = t[STREAM_VIDEO];
|
|
if (res == MP_NOPTS_VALUE)
|
|
res = t[STREAM_AUDIO];
|
|
if (res == MP_NOPTS_VALUE) {
|
|
for (int n = 0; n < STREAM_TYPE_COUNT; n++) {
|
|
res = t[n];
|
|
if (res != MP_NOPTS_VALUE)
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
res = MP_ADD_PTS(res, in->ts_offset);
|
|
|
|
pthread_mutex_unlock(&in->lock);
|
|
|
|
return res;
|
|
}
|
|
|
|
// Used by demuxers to report the amount of transferred bytes. This is for
|
|
// streams which circumvent demuxer->stream (stream statistics are handled by
|
|
// demux.c itself).
|
|
void demux_report_unbuffered_read_bytes(struct demuxer *demuxer, int64_t new)
|
|
{
|
|
struct demux_internal *in = demuxer->in;
|
|
assert(demuxer == in->d_thread);
|
|
|
|
in->slave_unbuffered_read_bytes += new;
|
|
}
|
|
|
|
// Return bytes read since last query. It's a hack because it works only if
|
|
// the demuxer thread is disabled.
|
|
int64_t demux_get_bytes_read_hack(struct demuxer *demuxer)
|
|
{
|
|
struct demux_internal *in = demuxer->in;
|
|
|
|
// Required because demuxer==in->d_user, and we access in->d_thread.
|
|
// Locking won't solve this, because we also need to access struct stream.
|
|
assert(!in->threading);
|
|
|
|
update_bytes_read(in);
|
|
|
|
int64_t res = in->hack_unbuffered_read_bytes;
|
|
in->hack_unbuffered_read_bytes = 0;
|
|
return res;
|
|
}
|
|
|
|
void demux_get_bitrate_stats(struct demuxer *demuxer, double *rates)
|
|
{
|
|
struct demux_internal *in = demuxer->in;
|
|
assert(demuxer == in->d_user);
|
|
|
|
pthread_mutex_lock(&in->lock);
|
|
|
|
for (int n = 0; n < STREAM_TYPE_COUNT; n++)
|
|
rates[n] = -1;
|
|
for (int n = 0; n < in->num_streams; n++) {
|
|
struct demux_stream *ds = in->streams[n]->ds;
|
|
if (ds->selected && ds->bitrate >= 0)
|
|
rates[ds->type] = MPMAX(0, rates[ds->type]) + ds->bitrate;
|
|
}
|
|
|
|
pthread_mutex_unlock(&in->lock);
|
|
}
|
|
|
|
void demux_get_reader_state(struct demuxer *demuxer, struct demux_reader_state *r)
|
|
{
|
|
struct demux_internal *in = demuxer->in;
|
|
assert(demuxer == in->d_user);
|
|
|
|
pthread_mutex_lock(&in->lock);
|
|
|
|
*r = (struct demux_reader_state){
|
|
.eof = in->last_eof,
|
|
.ts_reader = MP_NOPTS_VALUE,
|
|
.ts_end = MP_NOPTS_VALUE,
|
|
.ts_duration = -1,
|
|
.total_bytes = in->total_bytes,
|
|
.seeking = in->seeking_in_progress,
|
|
.low_level_seeks = in->low_level_seeks,
|
|
.ts_last = in->demux_ts,
|
|
.bytes_per_second = in->bytes_per_second,
|
|
.byte_level_seeks = in->byte_level_seeks,
|
|
.file_cache_bytes = in->cache ? demux_cache_get_size(in->cache) : -1,
|
|
};
|
|
bool any_packets = false;
|
|
for (int n = 0; n < in->num_streams; n++) {
|
|
struct demux_stream *ds = in->streams[n]->ds;
|
|
if (ds->eager && !(!ds->queue->head && ds->eof) && !ds->ignore_eof) {
|
|
r->underrun |= !ds->reader_head && !ds->eof && !ds->still_image;
|
|
r->ts_reader = MP_PTS_MAX(r->ts_reader, ds->base_ts);
|
|
r->ts_end = MP_PTS_MAX(r->ts_end, ds->queue->last_ts);
|
|
any_packets |= !!ds->reader_head;
|
|
}
|
|
r->fw_bytes += get_foward_buffered_bytes(ds);
|
|
}
|
|
r->idle = (in->idle && !r->underrun) || r->eof;
|
|
r->underrun &= !r->idle && in->threading;
|
|
r->ts_reader = MP_ADD_PTS(r->ts_reader, in->ts_offset);
|
|
r->ts_end = MP_ADD_PTS(r->ts_end, in->ts_offset);
|
|
if (r->ts_reader != MP_NOPTS_VALUE && r->ts_reader <= r->ts_end)
|
|
r->ts_duration = r->ts_end - r->ts_reader;
|
|
if (in->seeking || !any_packets)
|
|
r->ts_duration = 0;
|
|
for (int n = 0; n < MPMIN(in->num_ranges, MAX_SEEK_RANGES); n++) {
|
|
struct demux_cached_range *range = in->ranges[n];
|
|
if (range->seek_start != MP_NOPTS_VALUE) {
|
|
r->seek_ranges[r->num_seek_ranges++] =
|
|
(struct demux_seek_range){
|
|
.start = MP_ADD_PTS(range->seek_start, in->ts_offset),
|
|
.end = MP_ADD_PTS(range->seek_end, in->ts_offset),
|
|
};
|
|
r->bof_cached |= range->is_bof;
|
|
r->eof_cached |= range->is_eof;
|
|
}
|
|
}
|
|
|
|
pthread_mutex_unlock(&in->lock);
|
|
}
|
|
|
|
bool demux_cancel_test(struct demuxer *demuxer)
|
|
{
|
|
return mp_cancel_test(demuxer->cancel);
|
|
}
|
|
|
|
struct demux_chapter *demux_copy_chapter_data(struct demux_chapter *c, int num)
|
|
{
|
|
struct demux_chapter *new = talloc_array(NULL, struct demux_chapter, num);
|
|
for (int n = 0; n < num; n++) {
|
|
new[n] = c[n];
|
|
new[n].metadata = mp_tags_dup(new, new[n].metadata);
|
|
}
|
|
return new;
|
|
}
|
|
|
|
static void visit_tags(void *ctx, void (*visit)(void *ctx, void *ta, char **s),
|
|
struct mp_tags *tags)
|
|
{
|
|
for (int n = 0; n < (tags ? tags->num_keys : 0); n++)
|
|
visit(ctx, tags, &tags->values[n]);
|
|
}
|
|
|
|
static void visit_meta(struct demuxer *demuxer, void *ctx,
|
|
void (*visit)(void *ctx, void *ta, char **s))
|
|
{
|
|
struct demux_internal *in = demuxer->in;
|
|
|
|
for (int n = 0; n < in->num_streams; n++) {
|
|
struct sh_stream *sh = in->streams[n];
|
|
|
|
visit(ctx, sh, &sh->title);
|
|
visit_tags(ctx, visit, sh->tags);
|
|
}
|
|
|
|
for (int n = 0; n < demuxer->num_chapters; n++)
|
|
visit_tags(ctx, visit, demuxer->chapters[n].metadata);
|
|
|
|
visit_tags(ctx, visit, demuxer->metadata);
|
|
}
|
|
|
|
|
|
static void visit_detect(void *ctx, void *ta, char **s)
|
|
{
|
|
char **all = ctx;
|
|
|
|
if (*s)
|
|
*all = talloc_asprintf_append_buffer(*all, "%s\n", *s);
|
|
}
|
|
|
|
static void visit_convert(void *ctx, void *ta, char **s)
|
|
{
|
|
struct demuxer *demuxer = ctx;
|
|
struct demux_internal *in = demuxer->in;
|
|
|
|
if (!*s)
|
|
return;
|
|
|
|
bstr data = bstr0(*s);
|
|
bstr conv = mp_iconv_to_utf8(in->log, data, in->meta_charset,
|
|
MP_ICONV_VERBOSE);
|
|
if (conv.start && conv.start != data.start) {
|
|
char *ns = conv.start; // 0-termination is guaranteed
|
|
// (The old string might not be an alloc, but if it is, it's a talloc
|
|
// child, and will not leak, even if it stays allocated uselessly.)
|
|
*s = ns;
|
|
talloc_steal(ta, *s);
|
|
}
|
|
}
|
|
|
|
static void demux_convert_tags_charset(struct demuxer *demuxer)
|
|
{
|
|
struct demux_internal *in = demuxer->in;
|
|
|
|
char *cp = in->opts->meta_cp;
|
|
if (!cp || mp_charset_is_utf8(cp))
|
|
return;
|
|
|
|
char *data = talloc_strdup(NULL, "");
|
|
visit_meta(demuxer, &data, visit_detect);
|
|
|
|
in->meta_charset = (char *)mp_charset_guess(in, in->log, bstr0(data), cp, 0);
|
|
if (in->meta_charset && !mp_charset_is_utf8(in->meta_charset)) {
|
|
MP_INFO(demuxer, "Using tag charset: %s\n", in->meta_charset);
|
|
visit_meta(demuxer, demuxer, visit_convert);
|
|
}
|
|
|
|
talloc_free(data);
|
|
}
|
|
|
|
static bool get_demux_sub_opts(int index, const struct m_sub_options **sub)
|
|
{
|
|
if (!demuxer_list[index])
|
|
return false;
|
|
*sub = demuxer_list[index]->options;
|
|
return true;
|
|
}
|