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another chapter in the neverending mov demuxer cleanup

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a timebase isnt an average frame rate neither can highlevel (considering edit lists) duration be mixed with lowlevel ones

Originally committed as revision 4391 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2005-06-24 11:43:08 +00:00
parent b4b87d4841
commit 961e0ccdca
1 changed files with 12 additions and 46 deletions
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58
libavformat/mov.c
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@ -652,7 +652,7 @@ static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
#ifdef DEBUG
av_log(NULL, AV_LOG_DEBUG, "track[%i].time_scale = %i\n", c->fc->nb_streams-1, c->streams[c->fc->nb_streams-1]->time_scale); /* time scale */
#endif
get_be32(pb); /* duration */
c->fc->streams[c->fc->nb_streams-1]->duration= get_be32(pb); /* duration */
get_be16(pb); /* language */
get_be16(pb); /* quality */
@ -1338,44 +1338,20 @@ av_log(NULL, AV_LOG_DEBUG, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1,
sample_duration = get_be32(pb);
c->streams[c->fc->nb_streams - 1]->stts_data[i].count= sample_count;
c->streams[c->fc->nb_streams - 1]->stts_data[i].duration= sample_duration;
#ifdef DEBUG
av_log(NULL, AV_LOG_DEBUG, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
#endif
duration+=sample_duration*sample_count;
total_sample_count+=sample_count;
#if 0 //We calculate an average instead, needed by .mp4-files created with nec e606 3g phone
if (!i && st->codec.codec_type==CODEC_TYPE_VIDEO) {
st->codec.time_base.num = sample_duration ? sample_duration : 1;
st->codec.time_base.den = c->streams[c->fc->nb_streams-1]->time_scale;
#ifdef DEBUG
av_log(NULL, AV_LOG_DEBUG, "VIDEO FRAME RATE= %i (sd= %i)\n", st->codec.time_base.den, sample_duration);
#endif
}
#endif
}
/*The stsd atom which contain codec type sometimes comes after the stts so we cannot check for codec_type*/
if(duration>0)
{
av_reduce(
&st->codec.time_base.den,
&st->codec.time_base.num,
c->streams[c->fc->nb_streams-1]->time_scale * total_sample_count,
duration,
INT_MAX
);
#ifdef DEBUG
av_log(NULL, AV_LOG_DEBUG, "FRAME RATE average (video or audio)= %f (tot sample count= %i ,tot dur= %i timescale=%d)\n", (float)st->codec.time_base.den/st->codec.time_base.num,total_sample_count,duration,c->streams[c->fc->nb_streams-1]->time_scale);
#endif
}
else
{
st->codec.time_base.num = 1;
st->codec.time_base.den = c->streams[c->fc->nb_streams-1]->time_scale;
}
av_set_pts_info(st, 64, 1, c->streams[c->fc->nb_streams-1]->time_scale);
// st->codec.time_base.num = 1;
// st->codec.time_base.den = c->streams[c->fc->nb_streams-1]->time_scale;
st->nb_frames= total_sample_count;
if(duration)
st->duration= duration;
return 0;
}
@ -1425,7 +1401,6 @@ static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
st->priv_data = sc;
st->codec.codec_type = CODEC_TYPE_MOV_OTHER;
st->start_time = 0; /* XXX: check */
st->duration = (c->duration * (int64_t)AV_TIME_BASE) / c->time_scale;
c->streams[c->fc->nb_streams-1] = sc;
return mov_read_default(c, pb, atom);
@ -1455,7 +1430,7 @@ static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
get_be32(pb); /* reserved */
st->start_time = 0; /* check */
st->duration = (get_be32(pb) * (int64_t)AV_TIME_BASE) / c->time_scale; /* duration */
get_be32(pb); /* highlevel (considering edits) duration in movie timebase */
get_be32(pb); /* reserved */
get_be32(pb); /* reserved */
@ -2033,12 +2008,8 @@ readchunk:
pts = dts + duration;
}else
pts = dts;
pkt->pts = av_rescale( pts,
(int64_t)s->streams[sc->ffindex]->time_base.den,
(int64_t)sc->time_scale * (int64_t)s->streams[sc->ffindex]->time_base.num );
pkt->dts = av_rescale( dts,
(int64_t)s->streams[sc->ffindex]->time_base.den,
(int64_t)sc->time_scale * (int64_t)s->streams[sc->ffindex]->time_base.num );
pkt->pts = pts;
pkt->dts = dts;
#ifdef DEBUG
av_log(NULL, AV_LOG_DEBUG, "stream #%d smp #%ld dts = %lld pts = %lld (smp:%ld time:%lld idx:%d ent:%d count:%d dur:%d)\n"
, pkt->stream_index, sc->current_sample-1, pkt->dts, pkt->pts
@ -2058,12 +2029,11 @@ readchunk:
/**
* Seek method based on the one described in the Appendix C of QTFileFormat.pdf
*/
static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
{
MOVContext* mov = (MOVContext *) s->priv_data;
MOVStreamContext* sc;
int32_t i, a, b, m;
int64_t sample_time;
int64_t start_time;
int32_t seek_sample, sample;
int32_t duration;
@ -2100,10 +2070,6 @@ static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp
#ifdef DEBUG
av_log(s, AV_LOG_DEBUG, "Searching for time %li in stream #%i (time_scale=%i)\n", (long)timestamp, mov_idx, sc->time_scale);
#endif
// convert timestamp from time_base unit to timescale unit
sample_time = av_rescale( timestamp,
(int64_t)sc->time_scale * s->streams[stream_index]->time_base.num,
(int64_t)s->streams[stream_index]->time_base.den);
start_time = 0; // FIXME use elst atom
sample = 1; // sample are 0 based in table
#ifdef DEBUG