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Code Issues Releases Activity

simplify timebase if possible

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ignore edit lists instead of always failing

Originally committed as revision 4930 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2006-02-02 20:56:35 +00:00
parent 9f75260e68
commit cd7352d5aa
1 changed files with 34 additions and 11 deletions
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45
libavformat/mov.c
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@ -63,6 +63,9 @@
#include "qtpalette.h"
#undef NDEBUG
#include <assert.h>
/* Allows seeking (MOV_SPLIT_CHUNKS should also be defined) */
#define MOV_SEEK
@ -279,6 +282,7 @@ typedef struct MOVStreamContext {
long keyframe_count;
long *keyframes;
int time_scale;
int time_rate;
long current_sample;
long left_in_chunk; /* how many samples before next chunk */
MOV_esds_t esds;
@ -720,7 +724,6 @@ static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
(version==1)?get_be64(pb):get_be32(pb); /* modification time */
c->streams[c->fc->nb_streams-1]->time_scale = get_be32(pb);
av_set_pts_info(c->fc->streams[c->fc->nb_streams-1], 64, 1, c->streams[c->fc->nb_streams-1]->time_scale);
#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 */
@ -1415,7 +1418,7 @@ static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
//MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
unsigned int i, entries;
int64_t duration=0;
int64_t total_sample_count=0;
@ -1428,20 +1431,25 @@ static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
if(entries >= UINT_MAX / sizeof(Time2Sample))
return -1;
c->streams[c->fc->nb_streams-1]->stts_count = entries;
c->streams[c->fc->nb_streams-1]->stts_data = av_malloc(entries * sizeof(Time2Sample));
sc->stts_count = entries;
sc->stts_data = av_malloc(entries * sizeof(Time2Sample));
#ifdef DEBUG
av_log(NULL, AV_LOG_DEBUG, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
#endif
sc->time_rate=0;
for(i=0; i<entries; i++) {
int sample_duration;
int sample_count;
sample_count=get_be32(pb);
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;
sc->stts_data[i].count= sample_count;
sc->stts_data[i].duration= sample_duration;
sc->time_rate= ff_gcd(sc->time_rate, sample_duration);
#ifdef DEBUG
av_log(NULL, AV_LOG_DEBUG, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
@ -1864,8 +1872,15 @@ static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
i++;
}
for(i=0; i<s->nb_streams;i++) {
MOVStreamContext *sc;
sc = (MOVStreamContext *)s->streams[i]->priv_data;
MOVStreamContext *sc = (MOVStreamContext *)s->streams[i]->priv_data;
if(!sc->time_rate)
sc->time_rate=1;
av_set_pts_info(s->streams[i], 64, sc->time_rate, sc->time_scale);
assert(s->streams[i]->duration % sc->time_rate == 0);
s->streams[i]->duration /= sc->time_rate;
sc->ffindex = i;
sc->is_ff_stream = 1;
}
@ -1882,6 +1897,7 @@ static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
{
MOVContext *mov = (MOVContext *) s->priv_data;
MOVStreamContext *sc;
AVStream *st;
int64_t offset = INT64_MAX;
int64_t best_dts = INT64_MAX;
int i, a, b, m;
@ -2109,8 +2125,13 @@ readchunk:
pts = dts + duration;
}else
pts = dts;
pkt->pts = pts;
pkt->dts = dts;
st= s->streams[ sc->ffindex ];
assert(pts % st->time_base.num == 0);
assert(dts % st->time_base.num == 0);
pkt->pts = pts / st->time_base.num;
pkt->dts = dts / st->time_base.num;
#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
@ -2160,8 +2181,10 @@ static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_ti
}
sc = mov->streams[mov_idx];
sample_time *= s->streams[stream_index]->time_base.num;
// Step 1. Find the edit that contains the requested time (elst)
if (sc->edit_count) {
if (sc->edit_count && 0) {
// FIXME should handle edit list
av_log(s, AV_LOG_ERROR, "mov: does not handle seeking in files that contain edit list (c:%d)\n", sc->edit_count);
return -1;