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support non interleaved mov files

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Originally committed as revision 4294 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2005-05-21 09:50:25 +00:00
parent 14ee9d1539
commit 86d8602f62
1 changed files with 48 additions and 10 deletions
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58
libavformat/mov.c
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@ -268,6 +268,7 @@ typedef struct MOVContext {
int found_mdat; /* we suppose we have enough data to read the file */
int64_t mdat_size;
int64_t mdat_offset;
int ni; ///< non interleaved mode
int total_streams;
/* some streams listed here aren't presented to the ffmpeg API, since they aren't either video nor audio
* but we need the info to be able to skip data from those streams in the 'mdat' section
@ -768,6 +769,14 @@ static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
}
} else
return -1;
for(i=0; i<c->fc->nb_streams; i++){
MOVStreamContext *sc2 = (MOVStreamContext *)c->fc->streams[i]->priv_data;
int64_t first= sc2->chunk_offsets[0];
int64_t last= sc2->chunk_offsets[sc2->chunk_count-1];
if(first >= sc->chunk_offsets[entries-1] || last <= sc->chunk_offsets[0])
c->ni=1;
}
#ifdef DEBUG
/*
for(i=0; i<entries; i++) {
@ -1799,7 +1808,8 @@ static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
{
MOVContext *mov = (MOVContext *) s->priv_data;
MOVStreamContext *sc;
int64_t offset = 0x0FFFFFFFFFFFFFFFLL;
int64_t offset = INT64_MAX;
int64_t best_dts = INT64_MAX;
int i, a, b, m;
int size;
int idx;
@ -1833,17 +1843,44 @@ static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
again:
sc = 0;
if(offset == INT64_MAX)
best_dts= INT64_MAX;
for(i=0; i<mov->total_streams; i++) {
MOVStreamContext *msc = mov->streams[i];
//av_log(NULL, AV_LOG_DEBUG, "MOCHUNK %ld %d %p pos:%Ld\n", mov->streams[i]->next_chunk, mov->total_streams, mov->streams[i], url_ftell(&s->pb));
if ((msc->next_chunk < msc->chunk_count) && msc->next_chunk >= 0
&& (msc->chunk_offsets[msc->next_chunk] < offset)) {
sc = msc;
offset = msc->chunk_offsets[msc->next_chunk];
//av_log(NULL, AV_LOG_DEBUG, "SELETED %Ld i:%d\n", offset, i);
if ((msc->next_chunk < msc->chunk_count) && msc->next_chunk >= 0){
if (msc->sample_to_time_index < msc->stts_count && mov->ni) {
int64_t dts;
int index= msc->sample_to_time_index;
int sample= msc->sample_to_time_sample;
int time= msc->sample_to_time_time;
int duration = msc->stts_data[index].duration;
int count = msc->stts_data[index].count;
if (sample + count < msc->current_sample) {
sample += count;
time += count*duration;
index ++;
duration = msc->stts_data[index].duration;
}
dts = time + (msc->current_sample-1 - sample) * (int64_t)duration;
dts = av_rescale(dts, AV_TIME_BASE, msc->time_scale);
// av_log(NULL, AV_LOG_DEBUG, "%d %Ld %Ld %Ld \n", i, dts, best_dts, offset);
if(dts < best_dts){
best_dts= dts;
sc = msc;
offset = msc->chunk_offsets[msc->next_chunk];
}
}else{
//av_log(NULL, AV_LOG_DEBUG, "MOCHUNK %ld %d %p pos:%Ld\n", mov->streams[i]->next_chunk, mov->total_streams, mov->streams[i], url_ftell(&s->pb));
if ((msc->chunk_offsets[msc->next_chunk] < offset)) {
sc = msc;
offset = msc->chunk_offsets[msc->next_chunk];
//av_log(NULL, AV_LOG_DEBUG, "SELETED %Ld i:%d\n", offset, i);
}
}
}
}
if (!sc || offset==0x0FFFFFFFFFFFFFFFLL)
if (!sc || offset==INT64_MAX)
return -1;
sc->next_chunk++;
@ -1857,7 +1894,7 @@ again:
if(!sc->is_ff_stream || (s->streams[sc->ffindex]->discard >= AVDISCARD_ALL)) {
url_fskip(&s->pb, (offset - mov->next_chunk_offset));
mov->next_chunk_offset = offset;
offset = 0x0FFFFFFFFFFFFFFFLL;
offset = INT64_MAX;
goto again;
}
@ -1866,7 +1903,8 @@ again:
for(i=0; i<mov->total_streams; i++) {
MOVStreamContext *msc = mov->streams[i];
if ((msc->next_chunk < msc->chunk_count)
&& ((msc->chunk_offsets[msc->next_chunk] - offset) < size))
&& msc->chunk_offsets[msc->next_chunk] - offset < size
&& msc->chunk_offsets[msc->next_chunk] > offset)
size = msc->chunk_offsets[msc->next_chunk] - offset;
}