mirror of https://github.com/mpv-player/mpv
305 lines
9.9 KiB
C
305 lines
9.9 KiB
C
/*
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* This file is part of MPlayer.
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*
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* MPlayer is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* MPlayer 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with MPlayer; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef MPLAYER_DEMUXER_H
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#define MPLAYER_DEMUXER_H
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#include <sys/types.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdbool.h>
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#include "misc/bstr.h"
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#include "common/common.h"
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#include "common/tags.h"
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#include "packet.h"
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#include "stheader.h"
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// Maximum total size of packets queued - if larger, no new packets are read,
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// and the demuxer pretends EOF was reached.
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#define MAX_PACKS 16000
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#define MAX_PACK_BYTES (400 * 1024 * 1024)
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// DEMUXER control commands/answers
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#define DEMUXER_CTRL_NOTIMPL -1
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#define DEMUXER_CTRL_DONTKNOW 0
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#define DEMUXER_CTRL_OK 1
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enum demux_ctrl {
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DEMUXER_CTRL_SWITCHED_TRACKS = 1,
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DEMUXER_CTRL_GET_TIME_LENGTH,
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DEMUXER_CTRL_RESYNC,
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DEMUXER_CTRL_IDENTIFY_PROGRAM,
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DEMUXER_CTRL_STREAM_CTRL,
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DEMUXER_CTRL_GET_READER_STATE,
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DEMUXER_CTRL_GET_NAV_EVENT,
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DEMUXER_CTRL_GET_BITRATE_STATS, // double[STREAM_TYPE_COUNT]
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};
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struct demux_ctrl_reader_state {
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bool eof, underrun, idle;
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double ts_range[2]; // start, end
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double ts_duration;
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};
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struct demux_ctrl_stream_ctrl {
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int ctrl;
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void *arg;
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int res;
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};
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#define SEEK_ABSOLUTE (1 << 0) // argument is a timestamp
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#define SEEK_FACTOR (1 << 1) // argument is in range [0,1]
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#define SEEK_FORWARD (1 << 2) // prefer later time if not exact
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#define SEEK_BACKWARD (1 << 3) // prefer earlier time if not exact
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#define SEEK_SUBPREROLL (1 << 4) // try to get more subtitle packets
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#define SEEK_HR (1 << 5) // hr-seek (this is a weak hint only)
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// Strictness of the demuxer open format check.
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// demux.c will try by default: NORMAL, UNSAFE (in this order)
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// Using "-demuxer format" will try REQUEST
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// Using "-demuxer +format" will try FORCE
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// REQUEST can be used as special value for raw demuxers which have no file
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// header check; then they should fail if check!=FORCE && check!=REQUEST.
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//
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// In general, the list is sorted from weakest check to normal check.
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// You can use relation operators to compare the check level.
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enum demux_check {
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DEMUX_CHECK_FORCE, // force format if possible
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DEMUX_CHECK_UNSAFE, // risky/fuzzy detection
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DEMUX_CHECK_REQUEST,// requested by user or stream implementation
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DEMUX_CHECK_NORMAL, // normal, safe detection
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};
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enum demux_event {
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DEMUX_EVENT_INIT = 1 << 0, // complete (re-)initialization
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DEMUX_EVENT_STREAMS = 1 << 1, // a stream was added
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DEMUX_EVENT_METADATA = 1 << 2, // metadata or stream_metadata changed
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DEMUX_EVENT_ALL = 0xFFFF,
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};
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#define MAX_SH_STREAMS 256
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struct demuxer;
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struct timeline;
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/**
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* Demuxer description structure
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*/
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typedef struct demuxer_desc {
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const char *name; // Demuxer name, used with -demuxer switch
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const char *desc; // Displayed to user
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// Return 0 on success, otherwise -1
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int (*open)(struct demuxer *demuxer, enum demux_check check);
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// The following functions are all optional
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int (*fill_buffer)(struct demuxer *demuxer); // 0 on EOF, otherwise 1
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void (*close)(struct demuxer *demuxer);
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void (*seek)(struct demuxer *demuxer, double rel_seek_secs, int flags);
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int (*control)(struct demuxer *demuxer, int cmd, void *arg);
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// See timeline.c
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void (*load_timeline)(struct timeline *tl);
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} demuxer_desc_t;
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typedef struct demux_chapter
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{
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int original_index;
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double pts;
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char *name;
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struct mp_tags *metadata;
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uint64_t demuxer_id; // for mapping to internal demuxer data structures
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} demux_chapter_t;
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struct demux_edition {
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uint64_t demuxer_id;
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bool default_edition;
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struct mp_tags *metadata;
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};
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struct matroska_segment_uid {
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unsigned char segment[16];
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uint64_t edition;
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};
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struct matroska_data {
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struct matroska_segment_uid uid;
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// Ordered chapter information if any
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struct matroska_chapter {
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uint64_t start;
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uint64_t end;
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bool has_segment_uid;
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struct matroska_segment_uid uid;
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char *name;
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} *ordered_chapters;
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int num_ordered_chapters;
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};
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struct replaygain_data {
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float track_gain;
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float track_peak;
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float album_gain;
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float album_peak;
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};
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typedef struct demux_attachment
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{
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char *name;
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char *type;
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void *data;
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unsigned int data_size;
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} demux_attachment_t;
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struct demuxer_params {
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int matroska_num_wanted_uids;
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struct matroska_segment_uid *matroska_wanted_uids;
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int matroska_wanted_segment;
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bool *matroska_was_valid;
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bool expect_subtitle;
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};
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typedef struct demuxer {
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const demuxer_desc_t *desc; ///< Demuxer description structure
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const char *filetype; // format name when not identified by demuxer (libavformat)
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int64_t filepos; // input stream current pos.
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char *filename; // same as stream->url
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bool seekable;
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bool partially_seekable; // implies seekable=true
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double start_time;
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// File format allows PTS resets (even if the current file is without)
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bool ts_resets_possible;
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// Send relative seek requests, instead of SEEK_ABSOLUTE or SEEK_FACTOR.
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// This is only done if the user explicitly uses a relative seek.
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bool rel_seeks;
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// Enable fast track switching hacks. This requires from the demuxer:
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// - seeking is somewhat reliable; packet contents must not change
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// - packet position (demux_packet.pos) is set, not negative, unique, and
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// monotonically increasing
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// - seeking leaves packet positions invariant
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bool allow_refresh_seeks;
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// The file data was fully read, and there is no need to keep the stream
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// open, keep the cache active, or to run the demuxer thread. Generating
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// packets is not slow either (unlike e.g. libavdevice pseudo-demuxers).
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// Typical examples: text subtitles, playlists
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bool fully_read;
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// Bitmask of DEMUX_EVENT_*
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int events;
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struct sh_stream **streams;
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int num_streams;
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struct demux_edition *editions;
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int num_editions;
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int edition;
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struct demux_chapter *chapters;
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int num_chapters;
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struct demux_attachment *attachments;
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int num_attachments;
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struct matroska_data matroska_data;
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// If the file is a playlist file
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struct playlist *playlist;
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struct mp_tags *metadata;
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void *priv; // demuxer-specific internal data
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struct MPOpts *opts;
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struct mpv_global *global;
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struct mp_log *log, *glog;
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struct demuxer_params *params;
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struct demux_internal *in; // internal to demux.c
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// Since the demuxer can run in its own thread, and the stream is not
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// thread-safe, only the demuxer is allowed to access the stream directly.
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// You can freely use demux_stream_control() to send STREAM_CTRLs, or use
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// demux_pause() to get exclusive access to the stream.
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struct stream *stream;
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} demuxer_t;
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typedef struct {
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int progid; //program id
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int aid, vid, sid; //audio, video and subtitle id
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} demux_program_t;
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void free_demuxer(struct demuxer *demuxer);
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int demux_add_packet(struct sh_stream *stream, demux_packet_t *dp);
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struct demux_packet *demux_read_packet(struct sh_stream *sh);
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int demux_read_packet_async(struct sh_stream *sh, struct demux_packet **out_pkt);
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bool demux_stream_is_selected(struct sh_stream *stream);
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double demux_get_next_pts(struct sh_stream *sh);
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bool demux_has_packet(struct sh_stream *sh);
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struct demux_packet *demux_read_any_packet(struct demuxer *demuxer);
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struct sh_stream *new_sh_stream(struct demuxer *demuxer, enum stream_type type);
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struct demuxer *demux_open(struct stream *stream, char *force_format,
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struct demuxer_params *params,
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struct mpv_global *global);
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void demux_start_thread(struct demuxer *demuxer);
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void demux_stop_thread(struct demuxer *demuxer);
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void demux_set_wakeup_cb(struct demuxer *demuxer, void (*cb)(void *ctx), void *ctx);
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void demux_flush(struct demuxer *demuxer);
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int demux_seek(struct demuxer *demuxer, double rel_seek_secs, int flags);
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void demux_set_enable_refresh_seeks(struct demuxer *demuxer, bool enabled);
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int demux_control(struct demuxer *demuxer, int cmd, void *arg);
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void demuxer_switch_track(struct demuxer *demuxer, enum stream_type type,
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struct sh_stream *stream);
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void demuxer_select_track(struct demuxer *demuxer, struct sh_stream *stream,
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bool selected);
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void demux_set_stream_autoselect(struct demuxer *demuxer, bool autoselect);
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void demuxer_help(struct mp_log *log);
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int demuxer_add_attachment(struct demuxer *demuxer, struct bstr name,
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struct bstr type, struct bstr data);
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int demuxer_add_chapter(demuxer_t *demuxer, struct bstr name,
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double pts, uint64_t demuxer_id);
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double demuxer_get_time_length(struct demuxer *demuxer);
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int demux_stream_control(demuxer_t *demuxer, int ctrl, void *arg);
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void demux_pause(demuxer_t *demuxer);
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void demux_unpause(demuxer_t *demuxer);
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void demux_changed(demuxer_t *demuxer, int events);
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void demux_update(demuxer_t *demuxer);
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struct sh_stream *demuxer_stream_by_demuxer_id(struct demuxer *d,
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enum stream_type t, int id);
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struct demux_chapter *demux_copy_chapter_data(struct demux_chapter *c, int num);
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bool demux_matroska_uid_cmp(struct matroska_segment_uid *a,
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struct matroska_segment_uid *b);
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const char *stream_type_name(enum stream_type type);
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#endif /* MPLAYER_DEMUXER_H */
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