mirror of https://github.com/mpv-player/mpv
941 lines
31 KiB
C
941 lines
31 KiB
C
/*
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* Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at>
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*
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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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// #include <stdio.h>
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#include <stdlib.h>
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// #include <unistd.h>
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#include <limits.h>
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#include <stdbool.h>
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#include <string.h>
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#include <assert.h>
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#include <libavformat/avformat.h>
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#include <libavformat/avio.h>
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#include <libavutil/avutil.h>
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#include <libavutil/avstring.h>
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#include <libavutil/mathematics.h>
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#include <libavutil/opt.h>
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#include "compat/libav.h"
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#include "config.h"
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#include "core/options.h"
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#include "core/mp_msg.h"
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#include "core/av_opts.h"
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#include "core/av_common.h"
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#include "core/bstr.h"
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#include "stream/stream.h"
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#include "demux.h"
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#include "stheader.h"
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#include "core/m_option.h"
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#define INITIAL_PROBE_SIZE STREAM_BUFFER_SIZE
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#define PROBE_BUF_SIZE (2 * 1024 * 1024)
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const m_option_t lavfdopts_conf[] = {
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OPT_INTRANGE("probesize", lavfdopts.probesize, 0, 32, INT_MAX),
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OPT_STRING("format", lavfdopts.format, 0),
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OPT_INTRANGE("analyzeduration", lavfdopts.analyzeduration, 0, 0, INT_MAX),
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OPT_INTRANGE("probescore", lavfdopts.probescore, 0, 0, 100),
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OPT_STRING("cryptokey", lavfdopts.cryptokey, 0),
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OPT_STRING("o", lavfdopts.avopt, 0),
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{NULL, NULL, 0, 0, 0, 0, NULL}
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};
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#define BIO_BUFFER_SIZE 32768
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typedef struct lavf_priv {
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char *filename;
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AVInputFormat *avif;
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AVFormatContext *avfc;
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AVIOContext *pb;
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uint8_t buffer[BIO_BUFFER_SIZE];
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int audio_streams;
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int video_streams;
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int sub_streams;
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int autoselect_sub;
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int64_t last_pts;
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int astreams[MAX_A_STREAMS];
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int vstreams[MAX_V_STREAMS];
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int sstreams[MAX_S_STREAMS];
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int cur_program;
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int nb_streams_last;
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bool use_dts;
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bool seek_by_bytes;
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int bitrate;
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char *mime_type;
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} lavf_priv_t;
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static const char *map_demuxer_mime_type[][2] = {
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{"audio/aacp", "aac"},
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{0}
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};
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static const char *find_demuxer_from_mime_type(char *mime_type)
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{
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for (int n = 0; map_demuxer_mime_type[n][0]; n++) {
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if (strcasecmp(map_demuxer_mime_type[n][0], mime_type) == 0)
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return map_demuxer_mime_type[n][1];
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}
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return NULL;
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}
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static int mp_read(void *opaque, uint8_t *buf, int size)
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{
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struct demuxer *demuxer = opaque;
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struct stream *stream = demuxer->stream;
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int ret;
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ret = stream_read(stream, buf, size);
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mp_msg(MSGT_HEADER, MSGL_DBG2,
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"%d=mp_read(%p, %p, %d), pos: %"PRId64", eof:%d\n",
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ret, stream, buf, size, stream_tell(stream), stream->eof);
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return ret;
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}
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static int64_t mp_seek(void *opaque, int64_t pos, int whence)
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{
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struct demuxer *demuxer = opaque;
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struct stream *stream = demuxer->stream;
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int64_t current_pos;
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mp_msg(MSGT_HEADER, MSGL_DBG2, "mp_seek(%p, %"PRId64", %d)\n",
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stream, pos, whence);
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if (whence == SEEK_CUR)
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pos += stream_tell(stream);
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else if (whence == SEEK_END && stream->end_pos > 0)
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pos += stream->end_pos;
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else if (whence == SEEK_SET)
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pos += stream->start_pos;
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else if (whence == AVSEEK_SIZE && stream->end_pos > 0) {
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stream_update_size(stream);
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return stream->end_pos - stream->start_pos;
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} else
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return -1;
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if (pos < 0)
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return -1;
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current_pos = stream_tell(stream);
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if (stream_seek(stream, pos) == 0) {
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stream_reset(stream);
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stream_seek(stream, current_pos);
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return -1;
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}
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return pos - stream->start_pos;
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}
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static int64_t mp_read_seek(void *opaque, int stream_idx, int64_t ts, int flags)
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{
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struct demuxer *demuxer = opaque;
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struct stream *stream = demuxer->stream;
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struct lavf_priv *priv = demuxer->priv;
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AVStream *st = priv->avfc->streams[stream_idx];
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double pts = (double)ts * st->time_base.num / st->time_base.den;
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int ret = stream_control(stream, STREAM_CTRL_SEEK_TO_TIME, &pts);
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if (ret < 0)
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ret = AVERROR(ENOSYS);
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return ret;
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}
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static void list_formats(void)
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{
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mp_msg(MSGT_DEMUX, MSGL_INFO, "Available lavf input formats:\n");
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AVInputFormat *fmt = NULL;
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while ((fmt = av_iformat_next(fmt)))
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mp_msg(MSGT_DEMUX, MSGL_INFO, "%15s : %s\n", fmt->name, fmt->long_name);
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}
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static char *remove_prefix(char *s, const char **prefixes)
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{
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for (int n = 0; prefixes[n]; n++) {
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int len = strlen(prefixes[n]);
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if (strncmp(s, prefixes[n], len) == 0)
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return s + len;
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}
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return s;
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}
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static const char *prefixes[] =
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{"ffmpeg://", "lavf://", "avdevice://", "av://", NULL};
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static int lavf_check_file(demuxer_t *demuxer)
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{
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struct MPOpts *opts = demuxer->opts;
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struct lavfdopts *lavfdopts = &opts->lavfdopts;
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AVProbeData avpd;
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lavf_priv_t *priv;
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int probe_data_size = 0;
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int read_size = INITIAL_PROBE_SIZE;
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int score;
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assert(!demuxer->priv);
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demuxer->priv = talloc_zero(NULL, lavf_priv_t);
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priv = demuxer->priv;
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priv->autoselect_sub = -1;
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priv->filename = demuxer->stream->url;
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if (!priv->filename) {
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priv->filename = "mp:unknown";
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mp_msg(MSGT_DEMUX, MSGL_WARN, "Stream url is not set!\n");
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}
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priv->filename = remove_prefix(priv->filename, prefixes);
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char *avdevice_format = NULL;
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if (demuxer->stream->type == STREAMTYPE_AVDEVICE) {
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// always require filename in the form "format:filename"
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char *sep = strchr(priv->filename, ':');
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if (!sep) {
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mp_msg(MSGT_DEMUX, MSGL_FATAL,
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"Must specify filename in 'format:filename' form\n");
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return 0;
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}
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avdevice_format = talloc_strndup(priv, priv->filename,
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sep - priv->filename);
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priv->filename = sep + 1;
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}
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char *format = lavfdopts->format;
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if (!format)
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format = demuxer->stream->lavf_type;
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if (!format)
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format = avdevice_format;
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if (!format && demuxer->stream->mime_type)
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format = (char *)find_demuxer_from_mime_type(demuxer->stream->mime_type);
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if (format) {
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if (strcmp(format, "help") == 0) {
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list_formats();
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return 0;
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}
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priv->avif = av_find_input_format(format);
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if (!priv->avif) {
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mp_msg(MSGT_DEMUX, MSGL_FATAL, "Unknown lavf format %s\n", format);
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return 0;
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}
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mp_msg(MSGT_DEMUX, MSGL_INFO, "Forced lavf %s demuxer\n",
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priv->avif->long_name);
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goto success;
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}
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// AVPROBE_SCORE_MAX/4 + 1 is the "recommended" limit. Below that, the user
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// is supposed to retry with larger probe sizes until a higher value is
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// reached.
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int min_probe = AVPROBE_SCORE_MAX/4 + 1;
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if (lavfdopts->probescore)
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min_probe = lavfdopts->probescore;
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avpd.buf = av_mallocz(FFMAX(BIO_BUFFER_SIZE, PROBE_BUF_SIZE) +
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FF_INPUT_BUFFER_PADDING_SIZE);
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do {
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read_size = stream_read(demuxer->stream, avpd.buf + probe_data_size,
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read_size);
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if (read_size < 0) {
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av_free(avpd.buf);
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return 0;
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}
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probe_data_size += read_size;
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avpd.filename = priv->filename;
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avpd.buf_size = probe_data_size;
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score = 0;
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priv->avif = av_probe_input_format2(&avpd, probe_data_size > 0, &score);
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if (priv->avif) {
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mp_msg(MSGT_HEADER, MSGL_V, "Found '%s' at score=%d size=%d.\n",
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priv->avif->name, score, probe_data_size);
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}
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if (priv->avif && score >= min_probe)
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break;
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priv->avif = NULL;
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read_size = FFMIN(2 * read_size, PROBE_BUF_SIZE - probe_data_size);
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} while (read_size > 0 && probe_data_size < PROBE_BUF_SIZE);
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av_free(avpd.buf);
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if (!priv->avif) {
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mp_msg(MSGT_HEADER, MSGL_V,
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"No format found, try lowering probescore.\n");
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return 0;
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}
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success:
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demuxer->filetype = priv->avif->long_name;
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if (!demuxer->filetype)
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demuxer->filetype = priv->avif->name;
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return DEMUXER_TYPE_LAVF;
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}
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static bool matches_avinputformat_name(struct lavf_priv *priv,
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const char *name)
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{
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const char *avifname = priv->avif->name;
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while (1) {
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const char *next = strchr(avifname, ',');
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if (!next)
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return !strcmp(avifname, name);
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int len = next - avifname;
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if (len == strlen(name) && !memcmp(avifname, name, len))
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return true;
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avifname = next + 1;
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}
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}
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static uint8_t char2int(char c)
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{
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if (c >= '0' && c <= '9') return c - '0';
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if (c >= 'a' && c <= 'f') return c - 'a' + 10;
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if (c >= 'A' && c <= 'F') return c - 'A' + 10;
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return 0;
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}
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static void parse_cryptokey(AVFormatContext *avfc, const char *str)
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{
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int len = strlen(str) / 2;
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uint8_t *key = av_mallocz(len);
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int i;
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avfc->keylen = len;
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avfc->key = key;
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for (i = 0; i < len; i++, str += 2)
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*key++ = (char2int(str[0]) << 4) | char2int(str[1]);
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}
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static void handle_stream(demuxer_t *demuxer, AVFormatContext *avfc, int i)
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{
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lavf_priv_t *priv = demuxer->priv;
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AVStream *st = avfc->streams[i];
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AVCodecContext *codec = st->codec;
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struct sh_stream *sh = NULL;
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switch (codec->codec_type) {
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case AVMEDIA_TYPE_AUDIO: {
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sh_audio_t *sh_audio = new_sh_audio_aid(demuxer, i, priv->audio_streams);
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if (!sh_audio)
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break;
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sh = sh_audio->gsh;
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priv->astreams[priv->audio_streams] = i;
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sh_audio->ds = demuxer->audio;
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sh_audio->format = codec->codec_tag;
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// probably unneeded
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sh_audio->channels = codec->channels;
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sh_audio->samplerate = codec->sample_rate;
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sh_audio->i_bps = codec->bit_rate / 8;
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st->discard = AVDISCARD_ALL;
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priv->audio_streams++;
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break;
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}
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case AVMEDIA_TYPE_VIDEO: {
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sh_video_t *sh_video = new_sh_video_vid(demuxer, i, priv->video_streams);
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if (!sh_video)
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break;
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sh = sh_video->gsh;
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priv->vstreams[priv->video_streams] = i;
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if (st->disposition & AV_DISPOSITION_ATTACHED_PIC)
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sh_video->gsh->attached_picture = true;
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sh_video->format = codec->codec_tag;
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sh_video->disp_w = codec->width;
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sh_video->disp_h = codec->height;
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/* Try to make up some frame rate value, even if it's not reliable.
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* FPS information is needed to support subtitle formats which base
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* timing on frame numbers.
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* Libavformat seems to report no "reliable" FPS value for AVI files,
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* while they are typically constant enough FPS that the value this
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* heuristic makes up works with subtitles in practice.
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*/
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double fps;
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if (st->r_frame_rate.num)
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fps = av_q2d(st->r_frame_rate);
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else
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fps = 1.0 / FFMAX(av_q2d(st->time_base),
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av_q2d(st->codec->time_base) *
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st->codec->ticks_per_frame);
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sh_video->fps = fps;
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sh_video->frametime = 1 / fps;
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if (st->sample_aspect_ratio.num)
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sh_video->aspect = codec->width * st->sample_aspect_ratio.num
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/ (float)(codec->height * st->sample_aspect_ratio.den);
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else
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sh_video->aspect = codec->width * codec->sample_aspect_ratio.num
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/ (float)(codec->height * codec->sample_aspect_ratio.den);
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sh_video->i_bps = codec->bit_rate / 8;
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mp_msg(MSGT_DEMUX, MSGL_DBG2, "aspect= %d*%d/(%d*%d)\n",
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codec->width, codec->sample_aspect_ratio.num,
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codec->height, codec->sample_aspect_ratio.den);
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sh_video->ds = demuxer->video;
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if (demuxer->video->id != priv->video_streams
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&& demuxer->video->id != -1)
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st->discard = AVDISCARD_ALL;
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else {
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demuxer->video->id = i;
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demuxer->video->sh = demuxer->v_streams[i];
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}
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priv->video_streams++;
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break;
|
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}
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case AVMEDIA_TYPE_SUBTITLE: {
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sh_sub_t *sh_sub;
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char type;
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if (codec->codec_id == CODEC_ID_TEXT ||
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codec->codec_id == AV_CODEC_ID_SUBRIP)
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type = 't';
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else if (codec->codec_id == CODEC_ID_MOV_TEXT)
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type = 'm';
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else if (codec->codec_id == CODEC_ID_SSA)
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type = 'a';
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else if (codec->codec_id == CODEC_ID_DVD_SUBTITLE)
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type = 'v';
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else if (codec->codec_id == CODEC_ID_XSUB)
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type = 'x';
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else if (codec->codec_id == CODEC_ID_DVB_SUBTITLE)
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type = 'b';
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else if (codec->codec_id == CODEC_ID_DVB_TELETEXT)
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type = 'd';
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else if (codec->codec_id == CODEC_ID_HDMV_PGS_SUBTITLE)
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type = 'p';
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else
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break;
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sh_sub = new_sh_sub_sid(demuxer, i, priv->sub_streams);
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if (!sh_sub)
|
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break;
|
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sh = sh_sub->gsh;
|
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priv->sstreams[priv->sub_streams] = i;
|
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sh_sub->type = type;
|
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if (codec->extradata_size) {
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sh_sub->extradata = malloc(codec->extradata_size);
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memcpy(sh_sub->extradata, codec->extradata, codec->extradata_size);
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sh_sub->extradata_len = codec->extradata_size;
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}
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priv->sub_streams++;
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break;
|
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}
|
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case AVMEDIA_TYPE_ATTACHMENT: {
|
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AVDictionaryEntry *ftag = av_dict_get(st->metadata, "filename",
|
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NULL, 0);
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char *filename = ftag ? ftag->value : NULL;
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if (st->codec->codec_id == CODEC_ID_TTF)
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demuxer_add_attachment(demuxer, bstr0(filename),
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bstr0("application/x-truetype-font"),
|
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(struct bstr){codec->extradata,
|
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codec->extradata_size});
|
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break;
|
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}
|
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default:
|
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st->discard = AVDISCARD_ALL;
|
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}
|
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if (sh) {
|
|
sh->codec = mp_codec_from_av_codec_id(codec->codec_id);
|
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sh->lav_headers = avcodec_alloc_context3(codec->codec);
|
|
assert(sh->lav_headers);
|
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avcodec_copy_context(sh->lav_headers, codec);
|
|
|
|
if (st->disposition & AV_DISPOSITION_DEFAULT)
|
|
sh->default_track = 1;
|
|
if (matches_avinputformat_name(priv, "mpeg"))
|
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sh->demuxer_id = st->id;
|
|
AVDictionaryEntry *title = av_dict_get(st->metadata, "title", NULL, 0);
|
|
if (title && title->value)
|
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sh->title = talloc_strdup(sh, title->value);
|
|
AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
|
|
if (lang && lang->value)
|
|
sh->lang = talloc_strdup(sh, lang->value);
|
|
}
|
|
}
|
|
|
|
static demuxer_t *demux_open_lavf(demuxer_t *demuxer)
|
|
{
|
|
struct MPOpts *opts = demuxer->opts;
|
|
struct lavfdopts *lavfdopts = &opts->lavfdopts;
|
|
AVFormatContext *avfc;
|
|
AVDictionaryEntry *t = NULL;
|
|
lavf_priv_t *priv = demuxer->priv;
|
|
int i;
|
|
|
|
// do not allow forcing the demuxer
|
|
if (!priv->avif)
|
|
return NULL;
|
|
|
|
stream_seek(demuxer->stream, 0);
|
|
|
|
avfc = avformat_alloc_context();
|
|
|
|
if (lavfdopts->cryptokey)
|
|
parse_cryptokey(avfc, lavfdopts->cryptokey);
|
|
if (matches_avinputformat_name(priv, "avi")) {
|
|
/* for avi libavformat returns the avi timestamps in .dts,
|
|
* some made-up stuff that's not really pts in .pts */
|
|
priv->use_dts = true;
|
|
demuxer->timestamp_type = TIMESTAMP_TYPE_SORT;
|
|
} else {
|
|
if (opts->user_correct_pts != 0)
|
|
avfc->flags |= AVFMT_FLAG_GENPTS;
|
|
}
|
|
if (index_mode == 0)
|
|
avfc->flags |= AVFMT_FLAG_IGNIDX;
|
|
|
|
if (lavfdopts->probesize) {
|
|
if (av_opt_set_int(avfc, "probesize", lavfdopts->probesize, 0) < 0)
|
|
mp_msg(MSGT_HEADER, MSGL_ERR,
|
|
"demux_lavf, couldn't set option probesize to %u\n",
|
|
lavfdopts->probesize);
|
|
}
|
|
if (lavfdopts->analyzeduration) {
|
|
if (av_opt_set_int(avfc, "analyzeduration",
|
|
lavfdopts->analyzeduration * AV_TIME_BASE, 0) < 0)
|
|
mp_msg(MSGT_HEADER, MSGL_ERR, "demux_lavf, couldn't set option "
|
|
"analyzeduration to %u\n", lavfdopts->analyzeduration);
|
|
}
|
|
|
|
if (lavfdopts->avopt) {
|
|
if (parse_avopts(avfc, lavfdopts->avopt) < 0) {
|
|
mp_msg(MSGT_HEADER, MSGL_ERR,
|
|
"Your options /%s/ look like gibberish to me pal\n",
|
|
lavfdopts->avopt);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
if (!(priv->avif->flags & AVFMT_NOFILE) &&
|
|
demuxer->stream->type != STREAMTYPE_AVDEVICE)
|
|
{
|
|
priv->pb = avio_alloc_context(priv->buffer, BIO_BUFFER_SIZE, 0,
|
|
demuxer, mp_read, NULL, mp_seek);
|
|
priv->pb->read_seek = mp_read_seek;
|
|
priv->pb->seekable = demuxer->stream->end_pos
|
|
&& (demuxer->stream->flags & MP_STREAM_SEEK) == MP_STREAM_SEEK
|
|
? AVIO_SEEKABLE_NORMAL : 0;
|
|
avfc->pb = priv->pb;
|
|
}
|
|
|
|
if (avformat_open_input(&avfc, priv->filename, priv->avif, NULL) < 0) {
|
|
mp_msg(MSGT_HEADER, MSGL_ERR,
|
|
"LAVF_header: avformat_open_input() failed\n");
|
|
return NULL;
|
|
}
|
|
|
|
priv->avfc = avfc;
|
|
if (avformat_find_stream_info(avfc, NULL) < 0) {
|
|
mp_msg(MSGT_HEADER, MSGL_ERR,
|
|
"LAVF_header: av_find_stream_info() failed\n");
|
|
return NULL;
|
|
}
|
|
/* Add metadata. */
|
|
while ((t = av_dict_get(avfc->metadata, "", t,
|
|
AV_DICT_IGNORE_SUFFIX)))
|
|
demux_info_add(demuxer, t->key, t->value);
|
|
|
|
for (i = 0; i < avfc->nb_chapters; i++) {
|
|
AVChapter *c = avfc->chapters[i];
|
|
uint64_t start = av_rescale_q(c->start, c->time_base,
|
|
(AVRational){1, 1000000000});
|
|
uint64_t end = av_rescale_q(c->end, c->time_base,
|
|
(AVRational){1, 1000000000});
|
|
t = av_dict_get(c->metadata, "title", NULL, 0);
|
|
demuxer_add_chapter(demuxer, t ? bstr0(t->value) : bstr0(NULL),
|
|
start, end);
|
|
}
|
|
|
|
for (i = 0; i < avfc->nb_streams; i++)
|
|
handle_stream(demuxer, avfc, i);
|
|
priv->nb_streams_last = avfc->nb_streams;
|
|
|
|
if (avfc->nb_programs) {
|
|
int p;
|
|
for (p = 0; p < avfc->nb_programs; p++) {
|
|
AVProgram *program = avfc->programs[p];
|
|
t = av_dict_get(program->metadata, "title", NULL, 0);
|
|
mp_msg(MSGT_HEADER, MSGL_INFO, "LAVF: Program %d %s\n",
|
|
program->id, t ? t->value : "");
|
|
mp_msg(MSGT_IDENTIFY, MSGL_V, "PROGRAM_ID=%d\n", program->id);
|
|
}
|
|
}
|
|
|
|
mp_msg(MSGT_HEADER, MSGL_V, "LAVF: %d audio and %d video streams found\n",
|
|
priv->audio_streams, priv->video_streams);
|
|
mp_msg(MSGT_HEADER, MSGL_V, "LAVF: build %d\n", LIBAVFORMAT_BUILD);
|
|
demuxer->audio->id = -2; // wait for higher-level code to select track
|
|
if (!priv->video_streams) {
|
|
demuxer->video->id = -2; // audio-only / sub-only
|
|
}
|
|
|
|
// disabled because unreliable per-stream bitrate values returned
|
|
// by libavformat trigger this heuristic incorrectly and break things
|
|
#if 0
|
|
/* libavformat sets bitrate for mpeg based on pts at start and end
|
|
* of file, which fails for files with pts resets. So calculate our
|
|
* own bitrate estimate. */
|
|
if (priv->avif->flags & AVFMT_TS_DISCONT) {
|
|
for (int i = 0; i < avfc->nb_streams; i++)
|
|
priv->bitrate += avfc->streams[i]->codec->bit_rate;
|
|
/* pts-based is more accurate if there are no resets; try to make
|
|
* a somewhat reasonable guess */
|
|
if (!avfc->duration || avfc->duration == AV_NOPTS_VALUE
|
|
|| priv->bitrate && (avfc->bit_rate < priv->bitrate / 2
|
|
|| avfc->bit_rate > priv->bitrate * 2))
|
|
priv->seek_by_bytes = true;
|
|
if (!priv->bitrate)
|
|
priv->bitrate = 1440000;
|
|
}
|
|
#endif
|
|
demuxer->accurate_seek = !priv->seek_by_bytes;
|
|
|
|
return demuxer;
|
|
}
|
|
|
|
static int destroy_avpacket(void *pkt)
|
|
{
|
|
av_free_packet(pkt);
|
|
return 0;
|
|
}
|
|
|
|
static int demux_lavf_fill_buffer(demuxer_t *demux, demux_stream_t *dsds)
|
|
{
|
|
lavf_priv_t *priv = demux->priv;
|
|
demux_packet_t *dp;
|
|
demux_stream_t *ds;
|
|
int id;
|
|
mp_msg(MSGT_DEMUX, MSGL_DBG2, "demux_lavf_fill_buffer()\n");
|
|
|
|
demux->filepos = stream_tell(demux->stream);
|
|
|
|
AVPacket *pkt = talloc(NULL, AVPacket);
|
|
if (av_read_frame(priv->avfc, pkt) < 0) {
|
|
talloc_free(pkt);
|
|
return 0;
|
|
}
|
|
talloc_set_destructor(pkt, destroy_avpacket);
|
|
|
|
// handle any new streams that might have been added
|
|
for (id = priv->nb_streams_last; id < priv->avfc->nb_streams; id++)
|
|
handle_stream(demux, priv->avfc, id);
|
|
|
|
priv->nb_streams_last = priv->avfc->nb_streams;
|
|
|
|
id = pkt->stream_index;
|
|
|
|
assert(id >= 0 && id < MAX_S_STREAMS);
|
|
if (demux->s_streams[id] && demux->sub->id == -1 &&
|
|
demux->s_streams[id]->gsh->demuxer_id == priv->autoselect_sub)
|
|
{
|
|
priv->autoselect_sub = -1;
|
|
demux->sub->id = id;
|
|
}
|
|
|
|
if (id == demux->audio->id) {
|
|
// audio
|
|
ds = demux->audio;
|
|
} else if (id == demux->video->id) {
|
|
// video
|
|
ds = demux->video;
|
|
} else if (id == demux->sub->id) {
|
|
// subtitle
|
|
ds = demux->sub;
|
|
} else {
|
|
talloc_free(pkt);
|
|
return 1;
|
|
}
|
|
|
|
// If the packet has pointers to temporary fields that could be
|
|
// overwritten/freed by next av_read_frame(), copy them to persistent
|
|
// allocations so we can safely queue the packet for any length of time.
|
|
if (av_dup_packet(pkt) < 0)
|
|
abort();
|
|
dp = new_demux_packet_fromdata(pkt->data, pkt->size);
|
|
dp->avpacket = pkt;
|
|
|
|
AVStream *st = priv->avfc->streams[id];
|
|
|
|
int64_t ts = priv->use_dts ? pkt->dts : pkt->pts;
|
|
if (ts == AV_NOPTS_VALUE && (st->disposition & AV_DISPOSITION_ATTACHED_PIC))
|
|
ts = 0;
|
|
if (ts != AV_NOPTS_VALUE) {
|
|
dp->pts = ts * av_q2d(priv->avfc->streams[id]->time_base);
|
|
priv->last_pts = dp->pts * AV_TIME_BASE;
|
|
// always set duration for subtitles, even if AV_PKT_FLAG_KEY isn't set,
|
|
// otherwise they will stay on screen to long if e.g. ASS is demuxed
|
|
// from mkv
|
|
if ((ds == demux->sub || (pkt->flags & AV_PKT_FLAG_KEY)) &&
|
|
pkt->convergence_duration > 0)
|
|
dp->duration = pkt->convergence_duration *
|
|
av_q2d(priv->avfc->streams[id]->time_base);
|
|
}
|
|
dp->pos = demux->filepos;
|
|
dp->keyframe = pkt->flags & AV_PKT_FLAG_KEY;
|
|
// append packet to DS stream:
|
|
ds_add_packet(ds, dp);
|
|
return 1;
|
|
}
|
|
|
|
static void demux_seek_lavf(demuxer_t *demuxer, float rel_seek_secs,
|
|
float audio_delay, int flags)
|
|
{
|
|
lavf_priv_t *priv = demuxer->priv;
|
|
int avsflags = 0;
|
|
mp_msg(MSGT_DEMUX, MSGL_DBG2, "demux_seek_lavf(%p, %f, %f, %d)\n",
|
|
demuxer, rel_seek_secs, audio_delay, flags);
|
|
|
|
if (priv->seek_by_bytes) {
|
|
int64_t pos = demuxer->filepos;
|
|
rel_seek_secs *= priv->bitrate / 8;
|
|
pos += rel_seek_secs;
|
|
av_seek_frame(priv->avfc, -1, pos, AVSEEK_FLAG_BYTE);
|
|
return;
|
|
}
|
|
|
|
if (flags & SEEK_ABSOLUTE)
|
|
priv->last_pts = 0;
|
|
else if (rel_seek_secs < 0)
|
|
avsflags = AVSEEK_FLAG_BACKWARD;
|
|
if (flags & SEEK_FORWARD)
|
|
avsflags = 0;
|
|
else if (flags & SEEK_BACKWARD)
|
|
avsflags = AVSEEK_FLAG_BACKWARD;
|
|
if (flags & SEEK_FACTOR) {
|
|
if (priv->avfc->duration == 0 || priv->avfc->duration == AV_NOPTS_VALUE)
|
|
return;
|
|
priv->last_pts += rel_seek_secs * priv->avfc->duration;
|
|
} else
|
|
priv->last_pts += rel_seek_secs * AV_TIME_BASE;
|
|
|
|
if (!priv->avfc->iformat->read_seek2) {
|
|
// Normal seeking.
|
|
av_seek_frame(priv->avfc, -1, priv->last_pts, avsflags);
|
|
} else {
|
|
// av_seek_frame() won't work. Use "new" seeking API. We don't use this
|
|
// API by default, because there are some major issues.
|
|
// Set max_ts==ts, so that demuxing starts from an earlier position in
|
|
// the worst case.
|
|
avformat_seek_file(priv->avfc, -1, INT64_MIN,
|
|
priv->last_pts, priv->last_pts, avsflags);
|
|
}
|
|
}
|
|
|
|
static int demux_lavf_control(demuxer_t *demuxer, int cmd, void *arg)
|
|
{
|
|
lavf_priv_t *priv = demuxer->priv;
|
|
|
|
switch (cmd) {
|
|
case DEMUXER_CTRL_CORRECT_PTS:
|
|
return DEMUXER_CTRL_OK;
|
|
case DEMUXER_CTRL_GET_TIME_LENGTH:
|
|
if (priv->seek_by_bytes) {
|
|
/* Our bitrate estimate may be better than would be used in
|
|
* otherwise similar fallback code at higher level */
|
|
if (demuxer->movi_end <= 0)
|
|
return DEMUXER_CTRL_DONTKNOW;
|
|
*(double *)arg = (demuxer->movi_end - demuxer->movi_start) * 8 /
|
|
priv->bitrate;
|
|
return DEMUXER_CTRL_GUESS;
|
|
}
|
|
if (priv->avfc->duration == 0 || priv->avfc->duration == AV_NOPTS_VALUE)
|
|
return DEMUXER_CTRL_DONTKNOW;
|
|
|
|
*((double *)arg) = (double)priv->avfc->duration / AV_TIME_BASE;
|
|
return DEMUXER_CTRL_OK;
|
|
|
|
case DEMUXER_CTRL_GET_PERCENT_POS:
|
|
if (priv->seek_by_bytes)
|
|
return DEMUXER_CTRL_DONTKNOW; // let it use the fallback code
|
|
if (priv->avfc->duration == 0 || priv->avfc->duration == AV_NOPTS_VALUE)
|
|
return DEMUXER_CTRL_DONTKNOW;
|
|
|
|
*((int *)arg) = (int)((priv->last_pts - priv->avfc->start_time) * 100 /
|
|
priv->avfc->duration);
|
|
return DEMUXER_CTRL_OK;
|
|
case DEMUXER_CTRL_SWITCH_AUDIO:
|
|
case DEMUXER_CTRL_SWITCH_VIDEO:
|
|
{
|
|
int id = *((int *)arg);
|
|
int newid = -2;
|
|
int i, curridx = -1;
|
|
int nstreams, *pstreams;
|
|
demux_stream_t *ds;
|
|
|
|
if (cmd == DEMUXER_CTRL_SWITCH_VIDEO) {
|
|
ds = demuxer->video;
|
|
nstreams = priv->video_streams;
|
|
pstreams = priv->vstreams;
|
|
} else {
|
|
ds = demuxer->audio;
|
|
nstreams = priv->audio_streams;
|
|
pstreams = priv->astreams;
|
|
}
|
|
for (i = 0; i < nstreams; i++) {
|
|
if (pstreams[i] == ds->id) { //current stream id
|
|
curridx = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (id == -1) { // next track
|
|
i = (curridx + 2) % (nstreams + 1) - 1;
|
|
if (i >= 0)
|
|
newid = pstreams[i];
|
|
} else if (id >= 0 && id < nstreams) { // select track by id
|
|
i = id;
|
|
newid = pstreams[i];
|
|
} else // no sound
|
|
i = -1;
|
|
|
|
if (i == curridx) {
|
|
*(int *) arg = curridx < 0 ? -2 : curridx;
|
|
return DEMUXER_CTRL_OK;
|
|
} else {
|
|
ds_free_packs(ds);
|
|
if (ds->id >= 0)
|
|
priv->avfc->streams[ds->id]->discard = AVDISCARD_ALL;
|
|
ds->id = newid;
|
|
*(int *) arg = i < 0 ? -2 : i;
|
|
if (newid >= 0)
|
|
priv->avfc->streams[newid]->discard = AVDISCARD_NONE;
|
|
return DEMUXER_CTRL_OK;
|
|
}
|
|
}
|
|
case DEMUXER_CTRL_AUTOSELECT_SUBTITLE:
|
|
{
|
|
demuxer->sub->id = -1;
|
|
priv->autoselect_sub = *((int *)arg);
|
|
return DEMUXER_CTRL_OK;
|
|
}
|
|
case DEMUXER_CTRL_IDENTIFY_PROGRAM:
|
|
{
|
|
demux_program_t *prog = arg;
|
|
AVProgram *program;
|
|
int p, i;
|
|
int start;
|
|
|
|
prog->vid = prog->aid = prog->sid = -2;
|
|
if (priv->avfc->nb_programs < 1)
|
|
return DEMUXER_CTRL_DONTKNOW;
|
|
|
|
if (prog->progid == -1) {
|
|
p = 0;
|
|
while (p < priv->avfc->nb_programs && priv->avfc->programs[p]->id != priv->cur_program)
|
|
p++;
|
|
p = (p + 1) % priv->avfc->nb_programs;
|
|
} else {
|
|
for (i = 0; i < priv->avfc->nb_programs; i++)
|
|
if (priv->avfc->programs[i]->id == prog->progid)
|
|
break;
|
|
if (i == priv->avfc->nb_programs)
|
|
return DEMUXER_CTRL_DONTKNOW;
|
|
p = i;
|
|
}
|
|
start = p;
|
|
redo:
|
|
program = priv->avfc->programs[p];
|
|
for (i = 0; i < program->nb_stream_indexes; i++) {
|
|
switch (priv->avfc->streams[program->stream_index[i]]->codec->codec_type) {
|
|
case AVMEDIA_TYPE_VIDEO:
|
|
if (prog->vid == -2)
|
|
prog->vid = program->stream_index[i];
|
|
break;
|
|
case AVMEDIA_TYPE_AUDIO:
|
|
if (prog->aid == -2)
|
|
prog->aid = program->stream_index[i];
|
|
break;
|
|
case AVMEDIA_TYPE_SUBTITLE:
|
|
if (prog->sid == -2)
|
|
prog->sid = program->stream_index[i];
|
|
break;
|
|
}
|
|
}
|
|
if (prog->aid >= 0 && prog->aid < MAX_A_STREAMS &&
|
|
demuxer->a_streams[prog->aid]) {
|
|
sh_audio_t *sh = demuxer->a_streams[prog->aid];
|
|
prog->aid = sh->aid;
|
|
} else
|
|
prog->aid = -2;
|
|
if (prog->vid >= 0 && prog->vid < MAX_V_STREAMS &&
|
|
demuxer->v_streams[prog->vid]) {
|
|
sh_video_t *sh = demuxer->v_streams[prog->vid];
|
|
prog->vid = sh->vid;
|
|
} else
|
|
prog->vid = -2;
|
|
if (prog->progid == -1 && prog->vid == -2 && prog->aid == -2) {
|
|
p = (p + 1) % priv->avfc->nb_programs;
|
|
if (p == start)
|
|
return DEMUXER_CTRL_DONTKNOW;
|
|
goto redo;
|
|
}
|
|
priv->cur_program = prog->progid = program->id;
|
|
return DEMUXER_CTRL_OK;
|
|
}
|
|
case DEMUXER_CTRL_RESYNC:
|
|
/* NOTE:
|
|
*
|
|
* We actually want to call ff_read_frame_flush() here, but it is
|
|
* internal.
|
|
*
|
|
* This function call seems to do the same for now.
|
|
*
|
|
* Once ff_read_frame_flush() is exported in some way, change this to
|
|
* call the new API instead of relying on av_seek_frame() to do this
|
|
* for us.
|
|
*/
|
|
avio_flush(priv->avfc->pb);
|
|
av_seek_frame(priv->avfc, 0, avio_tell(priv->avfc->pb),
|
|
AVSEEK_FLAG_BYTE);
|
|
avio_flush(priv->avfc->pb);
|
|
return DEMUXER_CTRL_OK;
|
|
default:
|
|
return DEMUXER_CTRL_NOTIMPL;
|
|
}
|
|
}
|
|
|
|
static void demux_close_lavf(demuxer_t *demuxer)
|
|
{
|
|
lavf_priv_t *priv = demuxer->priv;
|
|
if (priv) {
|
|
if (priv->avfc) {
|
|
av_freep(&priv->avfc->key);
|
|
avformat_close_input(&priv->avfc);
|
|
}
|
|
av_freep(&priv->pb);
|
|
talloc_free(priv);
|
|
demuxer->priv = NULL;
|
|
}
|
|
}
|
|
|
|
|
|
const demuxer_desc_t demuxer_desc_lavf = {
|
|
"libavformat demuxer",
|
|
"lavf",
|
|
"libavformat",
|
|
"Michael Niedermayer",
|
|
"supports many formats, requires libavformat",
|
|
DEMUXER_TYPE_LAVF,
|
|
1,
|
|
lavf_check_file,
|
|
demux_lavf_fill_buffer,
|
|
demux_open_lavf,
|
|
demux_close_lavf,
|
|
demux_seek_lavf,
|
|
demux_lavf_control
|
|
};
|