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mpv/libmpdemux/demux_lavf.c
reimar 1ad332f8a5 lavf: if seeking in the desired direction failed, also try in the opposite one, 
otherwise we might end up at some random position (where lavf last ended
up while trying to build the index).


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@29741 b3059339-0415-0410-9bf9-f77b7e298cf2
2009-09-30 08:19:49 +00:00

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/*
* Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of MPlayer.
*
* MPlayer is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* MPlayer is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
// #include <stdio.h>
#include <stdlib.h>
// #include <unistd.h>
#include <limits.h>
#include "config.h"
#include "mp_msg.h"
#include "help_mp.h"
#include "av_opts.h"
#include "stream/stream.h"
#include "demuxer.h"
#include "stheader.h"
#include "m_option.h"
#include "libvo/sub.h"
#include "libavformat/avformat.h"
#include "libavformat/avio.h"
#include "libavutil/avutil.h"
#include "libavcodec/opt.h"
#include "mp_taglists.h"
#define PROBE_BUF_SIZE (32*1024)
extern char *audio_lang;
extern char *dvdsub_lang;
extern int dvdsub_id;
static unsigned int opt_probesize = 0;
static unsigned int opt_analyzeduration = 0;
static char *opt_format;
static char *opt_cryptokey;
extern int ts_prog;
static char *opt_avopt = NULL;
const m_option_t lavfdopts_conf[] = {
{"probesize", &(opt_probesize), CONF_TYPE_INT, CONF_RANGE, 32, INT_MAX, NULL},
{"format", &(opt_format), CONF_TYPE_STRING, 0, 0, 0, NULL},
{"analyzeduration", &(opt_analyzeduration), CONF_TYPE_INT, CONF_RANGE, 0, INT_MAX, NULL},
{"cryptokey", &(opt_cryptokey), CONF_TYPE_STRING, 0, 0, 0, NULL},
{"o", &opt_avopt, CONF_TYPE_STRING, 0, 0, 0, NULL},
{NULL, NULL, 0, 0, 0, 0, NULL}
};
#define BIO_BUFFER_SIZE 32768
typedef struct lavf_priv_t{
AVInputFormat *avif;
AVFormatContext *avfc;
ByteIOContext *pb;
uint8_t buffer[BIO_BUFFER_SIZE];
int audio_streams;
int video_streams;
int sub_streams;
int64_t last_pts;
int astreams[MAX_A_STREAMS];
int vstreams[MAX_V_STREAMS];
int sstreams[MAX_S_STREAMS];
int cur_program;
}lavf_priv_t;
void print_wave_header(WAVEFORMATEX *h, int verbose_level);
void print_video_header(BITMAPINFOHEADER *h, int verbose_level);
static int mp_read(void *opaque, uint8_t *buf, int size) {
stream_t *stream = opaque;
int ret;
if(stream_eof(stream)) //needed?
return -1;
ret=stream_read(stream, buf, size);
mp_msg(MSGT_HEADER,MSGL_DBG2,"%d=mp_read(%p, %p, %d), eof:%d\n", ret, stream, buf, size, stream->eof);
return ret;
}
static int64_t mp_seek(void *opaque, int64_t pos, int whence) {
stream_t *stream = opaque;
int64_t current_pos;
mp_msg(MSGT_HEADER,MSGL_DBG2,"mp_seek(%p, %d, %d)\n", stream, (int)pos, whence);
if(whence == SEEK_CUR)
pos +=stream_tell(stream);
else if(whence == SEEK_END && stream->end_pos > 0)
pos += stream->end_pos;
else if(whence == SEEK_SET)
pos += stream->start_pos;
else if(whence == AVSEEK_SIZE && stream->end_pos > 0)
return stream->end_pos - stream->start_pos;
else
return -1;
if(pos<0)
return -1;
if(pos<stream->end_pos && stream->eof)
stream_reset(stream);
current_pos = stream_tell(stream);
if(stream_seek(stream, pos)==0) {
stream_reset(stream);
stream_seek(stream, current_pos);
return -1;
}
return pos - stream->start_pos;
}
static void list_formats(void) {
AVInputFormat *fmt;
mp_msg(MSGT_DEMUX, MSGL_INFO, "Available lavf input formats:\n");
for (fmt = first_iformat; fmt; fmt = fmt->next)
mp_msg(MSGT_DEMUX, MSGL_INFO, "%15s : %s\n", fmt->name, fmt->long_name);
}
static int lavf_check_file(demuxer_t *demuxer){
AVProbeData avpd;
uint8_t buf[PROBE_BUF_SIZE];
lavf_priv_t *priv;
if(!demuxer->priv)
demuxer->priv=calloc(sizeof(lavf_priv_t),1);
priv= demuxer->priv;
av_register_all();
if (opt_format) {
if (strcmp(opt_format, "help") == 0) {
list_formats();
return 0;
}
priv->avif= av_find_input_format(opt_format);
if (!priv->avif) {
mp_msg(MSGT_DEMUX,MSGL_FATAL,"Unknown lavf format %s\n", opt_format);
return 0;
}
mp_msg(MSGT_DEMUX,MSGL_INFO,"Forced lavf %s demuxer\n", priv->avif->long_name);
return DEMUXER_TYPE_LAVF;
}
if(stream_read(demuxer->stream, buf, PROBE_BUF_SIZE)!=PROBE_BUF_SIZE)
return 0;
avpd.filename= demuxer->stream->url;
avpd.buf= buf;
avpd.buf_size= PROBE_BUF_SIZE;
priv->avif= av_probe_input_format(&avpd, 1);
if(!priv->avif){
mp_msg(MSGT_HEADER,MSGL_V,"LAVF_check: no clue about this gibberish!\n");
return 0;
}else
mp_msg(MSGT_HEADER,MSGL_V,"LAVF_check: %s\n", priv->avif->long_name);
return DEMUXER_TYPE_LAVF;
}
static const char * const preferred_list[] = {
"dxa",
"flv",
"gxf",
"nut",
"nuv",
"mov,mp4,m4a,3gp,3g2,mj2",
"mpc",
"mpc8",
"mxf",
"swf",
"vqf",
"w64",
"wv",
NULL
};
static int lavf_check_preferred_file(demuxer_t *demuxer){
if (lavf_check_file(demuxer)) {
const char * const *p = preferred_list;
lavf_priv_t *priv = demuxer->priv;
while (*p) {
if (strcmp(*p, priv->avif->name) == 0)
return DEMUXER_TYPE_LAVF_PREFERRED;
p++;
}
}
return 0;
}
static uint8_t char2int(char c) {
if (c >= '0' && c <= '9') return c - '0';
if (c >= 'a' && c <= 'f') return c - 'a' + 10;
if (c >= 'A' && c <= 'F') return c - 'A' + 10;
return 0;
}
static void parse_cryptokey(AVFormatContext *avfc, const char *str) {
int len = strlen(str) / 2;
uint8_t *key = av_mallocz(len);
int i;
avfc->keylen = len;
avfc->key = key;
for (i = 0; i < len; i++, str += 2)
*key++ = (char2int(str[0]) << 4) | char2int(str[1]);
}
static void handle_stream(demuxer_t *demuxer, AVFormatContext *avfc, int i) {
lavf_priv_t *priv= demuxer->priv;
AVStream *st= avfc->streams[i];
AVCodecContext *codec= st->codec;
AVMetadataTag *lang = av_metadata_get(st->metadata, "language", NULL, 0);
int g, override_tag = av_codec_get_tag(mp_codecid_override_taglists,
codec->codec_id);
// For some formats (like PCM) always trust CODEC_ID_* more than codec_tag
if (override_tag)
codec->codec_tag = override_tag;
switch(codec->codec_type){
case CODEC_TYPE_AUDIO:{
WAVEFORMATEX *wf;
sh_audio_t* sh_audio;
sh_audio=new_sh_audio(demuxer, i);
mp_msg(MSGT_DEMUX, MSGL_INFO, MSGTR_AudioID, "lavf", i);
if(!sh_audio)
break;
priv->astreams[priv->audio_streams] = i;
priv->audio_streams++;
wf= calloc(sizeof(WAVEFORMATEX) + codec->extradata_size, 1);
// mp4a tag is used for all mp4 files no matter what they actually contain
if(codec->codec_tag == MKTAG('m', 'p', '4', 'a'))
codec->codec_tag= 0;
if(!codec->codec_tag)
codec->codec_tag= av_codec_get_tag(mp_wav_taglists, codec->codec_id);
wf->wFormatTag= codec->codec_tag;
wf->nChannels= codec->channels;
wf->nSamplesPerSec= codec->sample_rate;
wf->nAvgBytesPerSec= codec->bit_rate/8;
wf->nBlockAlign= codec->block_align ? codec->block_align : 1;
wf->wBitsPerSample= codec->bits_per_coded_sample;
wf->cbSize= codec->extradata_size;
if(codec->extradata_size)
memcpy(wf + 1, codec->extradata, codec->extradata_size);
sh_audio->wf= wf;
sh_audio->audio.dwSampleSize= codec->block_align;
if(codec->frame_size && codec->sample_rate){
sh_audio->audio.dwScale=codec->frame_size;
sh_audio->audio.dwRate= codec->sample_rate;
}else{
sh_audio->audio.dwScale= codec->block_align ? codec->block_align*8 : 8;
sh_audio->audio.dwRate = codec->bit_rate;
}
g= av_gcd(sh_audio->audio.dwScale, sh_audio->audio.dwRate);
sh_audio->audio.dwScale /= g;
sh_audio->audio.dwRate /= g;
// printf("sca:%d rat:%d fs:%d sr:%d ba:%d\n", sh_audio->audio.dwScale, sh_audio->audio.dwRate, codec->frame_size, codec->sample_rate, codec->block_align);
sh_audio->ds= demuxer->audio;
sh_audio->format= codec->codec_tag;
sh_audio->channels= codec->channels;
sh_audio->samplerate= codec->sample_rate;
sh_audio->i_bps= codec->bit_rate/8;
switch (codec->codec_id) {
case CODEC_ID_PCM_S8:
case CODEC_ID_PCM_U8:
sh_audio->samplesize = 1;
break;
case CODEC_ID_PCM_S16LE:
case CODEC_ID_PCM_S16BE:
case CODEC_ID_PCM_U16LE:
case CODEC_ID_PCM_U16BE:
sh_audio->samplesize = 2;
break;
case CODEC_ID_PCM_ALAW:
sh_audio->format = 0x6;
break;
case CODEC_ID_PCM_MULAW:
sh_audio->format = 0x7;
break;
}
if (lang && lang->value) {
sh_audio->lang = strdup(lang->value);
mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_AID_%d_LANG=%s\n", i, sh_audio->lang);
}
if (st->disposition & AV_DISPOSITION_DEFAULT)
sh_audio->default_track = 1;
if(mp_msg_test(MSGT_HEADER,MSGL_V) ) print_wave_header(sh_audio->wf, MSGL_V);
// select the first audio stream
if (!demuxer->audio->sh) {
demuxer->audio->id = i;
demuxer->audio->sh= demuxer->a_streams[i];
} else
st->discard= AVDISCARD_ALL;
break;
}
case CODEC_TYPE_VIDEO:{
sh_video_t* sh_video;
BITMAPINFOHEADER *bih;
sh_video=new_sh_video(demuxer, i);
mp_msg(MSGT_DEMUX, MSGL_INFO, MSGTR_VideoID, "lavf", i);
if(!sh_video) break;
priv->vstreams[priv->video_streams] = i;
priv->video_streams++;
bih=calloc(sizeof(BITMAPINFOHEADER) + codec->extradata_size,1);
if(codec->codec_id == CODEC_ID_RAWVIDEO) {
switch (codec->pix_fmt) {
case PIX_FMT_RGB24:
codec->codec_tag= MKTAG(24, 'B', 'G', 'R');
}
}
if(!codec->codec_tag)
codec->codec_tag= av_codec_get_tag(mp_bmp_taglists, codec->codec_id);
bih->biSize= sizeof(BITMAPINFOHEADER) + codec->extradata_size;
bih->biWidth= codec->width;
bih->biHeight= codec->height;
bih->biBitCount= codec->bits_per_coded_sample;
bih->biSizeImage = bih->biWidth * bih->biHeight * bih->biBitCount/8;
bih->biCompression= codec->codec_tag;
sh_video->bih= bih;
sh_video->disp_w= codec->width;
sh_video->disp_h= codec->height;
if (st->time_base.den) { /* if container has time_base, use that */
sh_video->video.dwRate= st->time_base.den;
sh_video->video.dwScale= st->time_base.num;
} else {
sh_video->video.dwRate= codec->time_base.den;
sh_video->video.dwScale= codec->time_base.num;
}
sh_video->fps=av_q2d(st->r_frame_rate);
sh_video->frametime=1/av_q2d(st->r_frame_rate);
sh_video->format=bih->biCompression;
if(st->sample_aspect_ratio.num)
sh_video->aspect = codec->width * st->sample_aspect_ratio.num
/ (float)(codec->height * st->sample_aspect_ratio.den);
else
sh_video->aspect=codec->width * codec->sample_aspect_ratio.num
/ (float)(codec->height * codec->sample_aspect_ratio.den);
sh_video->i_bps=codec->bit_rate/8;
mp_msg(MSGT_DEMUX,MSGL_DBG2,"aspect= %d*%d/(%d*%d)\n",
codec->width, codec->sample_aspect_ratio.num,
codec->height, codec->sample_aspect_ratio.den);
sh_video->ds= demuxer->video;
if(codec->extradata_size)
memcpy(sh_video->bih + 1, codec->extradata, codec->extradata_size);
if( mp_msg_test(MSGT_HEADER,MSGL_V) ) print_video_header(sh_video->bih, MSGL_V);
/*
short biPlanes;
int biXPelsPerMeter;
int biYPelsPerMeter;
int biClrUsed;
int biClrImportant;
*/
if(demuxer->video->id != i && demuxer->video->id != -1)
st->discard= AVDISCARD_ALL;
else{
demuxer->video->id = i;
demuxer->video->sh= demuxer->v_streams[i];
}
break;
}
case CODEC_TYPE_SUBTITLE:{
sh_sub_t* sh_sub;
char type;
/* only support text subtitles for now */
if(codec->codec_id == CODEC_ID_TEXT)
type = 't';
else if(codec->codec_id == CODEC_ID_MOV_TEXT)
type = 'm';
else if(codec->codec_id == CODEC_ID_SSA)
type = 'a';
else if(codec->codec_id == CODEC_ID_DVD_SUBTITLE)
type = 'v';
else
break;
sh_sub = new_sh_sub_sid(demuxer, i, priv->sub_streams);
mp_msg(MSGT_DEMUX, MSGL_INFO, MSGTR_SubtitleID, "lavf", priv->sub_streams);
if(!sh_sub) break;
priv->sstreams[priv->sub_streams] = i;
sh_sub->type = type;
if (codec->extradata_size) {
sh_sub->extradata = malloc(codec->extradata_size);
memcpy(sh_sub->extradata, codec->extradata, codec->extradata_size);
sh_sub->extradata_len = codec->extradata_size;
}
if (lang && lang->value) {
sh_sub->lang = strdup(lang->value);
mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_SID_%d_LANG=%s\n", priv->sub_streams, sh_sub->lang);
}
if (st->disposition & AV_DISPOSITION_DEFAULT)
sh_sub->default_track = 1;
priv->sub_streams++;
break;
}
case CODEC_TYPE_ATTACHMENT:{
if (st->codec->codec_id == CODEC_ID_TTF)
demuxer_add_attachment(demuxer, st->filename,
"application/x-truetype-font",
codec->extradata, codec->extradata_size);
break;
}
default:
st->discard= AVDISCARD_ALL;
}
}
static demuxer_t* demux_open_lavf(demuxer_t *demuxer){
AVFormatContext *avfc;
AVFormatParameters ap;
const AVOption *opt;
AVMetadataTag *t = NULL;
lavf_priv_t *priv= demuxer->priv;
int i;
char mp_filename[256]="mp:";
memset(&ap, 0, sizeof(AVFormatParameters));
stream_seek(demuxer->stream, 0);
avfc = av_alloc_format_context();
if (opt_cryptokey)
parse_cryptokey(avfc, opt_cryptokey);
if (user_correct_pts != 0)
avfc->flags |= AVFMT_FLAG_GENPTS;
if (index_mode == 0)
avfc->flags |= AVFMT_FLAG_IGNIDX;
ap.prealloced_context = 1;
if(opt_probesize) {
opt = av_set_int(avfc, "probesize", opt_probesize);
if(!opt) mp_msg(MSGT_HEADER,MSGL_ERR, "demux_lavf, couldn't set option probesize to %u\n", opt_probesize);
}
if(opt_analyzeduration) {
opt = av_set_int(avfc, "analyzeduration", opt_analyzeduration * AV_TIME_BASE);
if(!opt) mp_msg(MSGT_HEADER,MSGL_ERR, "demux_lavf, couldn't set option analyzeduration to %u\n", opt_analyzeduration);
}
if(opt_avopt){
if(parse_avopts(avfc, opt_avopt) < 0){
mp_msg(MSGT_HEADER,MSGL_ERR, "Your options /%s/ look like gibberish to me pal\n", opt_avopt);
return NULL;
}
}
if(demuxer->stream->url)
strncpy(mp_filename + 3, demuxer->stream->url, sizeof(mp_filename)-3);
else
strncpy(mp_filename + 3, "foobar.dummy", sizeof(mp_filename)-3);
priv->pb = av_alloc_put_byte(priv->buffer, BIO_BUFFER_SIZE, 0,
demuxer->stream, mp_read, NULL, mp_seek);
priv->pb->is_streamed = !demuxer->stream->end_pos || (demuxer->stream->flags & STREAM_SEEK) != STREAM_SEEK;
if(av_open_input_stream(&avfc, priv->pb, mp_filename, priv->avif, &ap)<0){
mp_msg(MSGT_HEADER,MSGL_ERR,"LAVF_header: av_open_input_stream() failed\n");
return NULL;
}
priv->avfc= avfc;
if(av_find_stream_info(avfc) < 0){
mp_msg(MSGT_HEADER,MSGL_ERR,"LAVF_header: av_find_stream_info() failed\n");
return NULL;
}
/* Add metadata. */
av_metadata_conv(avfc, NULL, avfc->iformat->metadata_conv);
while((t = av_metadata_get(avfc->metadata, "", t, AV_METADATA_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){1,1000});
uint64_t end = av_rescale_q(c->end, c->time_base, (AVRational){1,1000});
t = av_metadata_get(c->metadata, "title", NULL, 0);
demuxer_add_chapter(demuxer, t ? t->value : NULL, start, end);
}
for(i=0; i<avfc->nb_streams; i++)
handle_stream(demuxer, avfc, i);
if(avfc->nb_programs) {
int p, start=0, found=0;
if(ts_prog) {
for(p=0; p<avfc->nb_programs; p++) {
if(avfc->programs[p]->id == ts_prog) {
start = p;
found = 1;
break;
}
}
if(!found) {
mp_msg(MSGT_HEADER,MSGL_ERR,"DEMUX_LAVF: program %d doesn't seem to be present\n", ts_prog);
return NULL;
}
}
p = start;
do {
AVProgram *program = avfc->programs[p];
t = av_metadata_get(program->metadata, "title", NULL, 0);
mp_msg(MSGT_HEADER,MSGL_INFO,"LAVF: Program %d %s\n", program->id, t ? t->value : "");
if(!priv->cur_program && (demuxer->video->sh || demuxer->audio->sh))
priv->cur_program = program->id;
p = (p + 1) % avfc->nb_programs;
} while(p!=start);
}
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);
if(!priv->audio_streams) demuxer->audio->id=-2; // nosound
// else if(best_audio > 0 && demuxer->audio->id == -1) demuxer->audio->id=best_audio;
if(!priv->video_streams){
if(!priv->audio_streams){
mp_msg(MSGT_HEADER,MSGL_ERR,"LAVF: no audio or video headers found - broken file?\n");
return NULL;
}
demuxer->video->id=-2; // audio-only
} //else if (best_video > 0 && demuxer->video->id == -1) demuxer->video->id = best_video;
return demuxer;
}
static int demux_lavf_fill_buffer(demuxer_t *demux, demux_stream_t *dsds){
lavf_priv_t *priv= demux->priv;
AVPacket pkt;
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);
if(av_read_frame(priv->avfc, &pkt) < 0)
return 0;
id= pkt.stream_index;
if(id==demux->audio->id){
// audio
ds=demux->audio;
if(!ds->sh){
ds->sh=demux->a_streams[id];
mp_msg(MSGT_DEMUX,MSGL_V,"Auto-selected LAVF audio ID = %d\n",ds->id);
}
} else if(id==demux->video->id){
// video
ds=demux->video;
if(!ds->sh){
ds->sh=demux->v_streams[id];
mp_msg(MSGT_DEMUX,MSGL_V,"Auto-selected LAVF video ID = %d\n",ds->id);
}
} else if(id==demux->sub->id){
// subtitle
ds=demux->sub;
sub_utf8=1;
} else {
av_free_packet(&pkt);
return 1;
}
if(0/*pkt.destruct == av_destruct_packet*/){
//ok kids, dont try this at home :)
dp=malloc(sizeof(demux_packet_t));
dp->len=pkt.size;
dp->next=NULL;
dp->refcount=1;
dp->master=NULL;
dp->buffer=pkt.data;
pkt.destruct= NULL;
}else{
dp=new_demux_packet(pkt.size);
memcpy(dp->buffer, pkt.data, pkt.size);
av_free_packet(&pkt);
}
if(pkt.pts != AV_NOPTS_VALUE){
dp->pts=pkt.pts * av_q2d(priv->avfc->streams[id]->time_base);
priv->last_pts= dp->pts * AV_TIME_BASE;
if(pkt.convergence_duration)
dp->endpts = dp->pts + pkt.convergence_duration * av_q2d(priv->avfc->streams[id]->time_base);
}
dp->pos=demux->filepos;
dp->flags= !!(pkt.flags&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 (flags & SEEK_ABSOLUTE) {
priv->last_pts = priv->avfc->start_time;
} else {
if (rel_seek_secs < 0) 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 (av_seek_frame(priv->avfc, -1, priv->last_pts, avsflags) < 0) {
avsflags ^= AVSEEK_FLAG_BACKWARD;
av_seek_frame(priv->avfc, -1, 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->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->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 == -2) { // no sound
i = -1;
} else if(id == -1) { // next track
i = (curridx + 2) % (nstreams + 1) - 1;
if (i >= 0)
newid = pstreams[i];
}
else // select track by id
{
for(i = 0; i < nstreams; i++)
{
if(pstreams[i] == id)
{
newid = id;
break;
}
}
}
if(i == curridx)
return DEMUXER_CTRL_NOTIMPL;
else
{
ds_free_packs(ds);
if(ds->id >= 0)
priv->avfc->streams[ds->id]->discard = AVDISCARD_ALL;
*((int*)arg) = ds->id = newid;
if(newid >= 0)
priv->avfc->streams[newid]->discard = AVDISCARD_NONE;
return DEMUXER_CTRL_OK;
}
}
case DEMUXER_CTRL_IDENTIFY_PROGRAM:
{
demux_program_t *prog = arg;
AVProgram *program;
int p, i;
int start;
if(priv->avfc->nb_programs < 2)
return DEMUXER_CTRL_NOTIMPL;
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_NOTIMPL;
p = i;
}
prog->vid = prog->aid = prog->sid = -2; //no audio and no video by default
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 CODEC_TYPE_VIDEO:
if(prog->vid == -2)
prog->vid = program->stream_index[i];
break;
case CODEC_TYPE_AUDIO:
if(prog->aid == -2)
prog->aid = program->stream_index[i];
break;
case CODEC_TYPE_SUBTITLE:
if(prog->sid == -2 && priv->avfc->streams[program->stream_index[i]]->codec->codec_id == CODEC_ID_TEXT)
prog->sid = program->stream_index[i];
break;
}
}
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;
}
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);
av_close_input_stream(priv->avfc);
}
av_freep(&priv->pb);
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,
0, // Check after other demuxer
lavf_check_file,
demux_lavf_fill_buffer,
demux_open_lavf,
demux_close_lavf,
demux_seek_lavf,
demux_lavf_control
};
const demuxer_desc_t demuxer_desc_lavf_preferred = {
"libavformat preferred demuxer",
"lavfpref",
"libavformat",
"Michael Niedermayer",
"supports many formats, requires libavformat",
DEMUXER_TYPE_LAVF_PREFERRED,
1,
lavf_check_preferred_file,
demux_lavf_fill_buffer,
demux_open_lavf,
demux_close_lavf,
demux_seek_lavf,
demux_lavf_control
};
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