[FFmpeg-cvslog] Revert "mov: Change DTS-based seek into CTS-based seek."
Martin Storsjö
git at videolan.org
Mon Mar 2 21:03:02 CET 2015
ffmpeg | branch: master | Martin Storsjö <martin at martin.st> | Sat Feb 28 23:51:16 2015 +0200| [91eee2af87278b3c2008f7a86d2cdfe6934e9f42] | committer: Martin Storsjö
Revert "mov: Change DTS-based seek into CTS-based seek."
This reverts commit 4abfa387b8234736f6e0e541951e3d5eb60eb843.
This commit broke playback of fragmented mp4 files with b-frames.
While investigating this, it turned out that the general framework
isn't ready for a PTS-based index yet. Revert this change until
a better thought out solution is in place.
Signed-off-by: Martin Storsjö <martin at martin.st>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=91eee2af87278b3c2008f7a86d2cdfe6934e9f42
---
libavformat/mov.c | 44 +++++++++++++++-----------------------------
1 file changed, 15 insertions(+), 29 deletions(-)
diff --git a/libavformat/mov.c b/libavformat/mov.c
index fb756c4..df7357f 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -2099,7 +2099,6 @@ static void mov_build_index(MOVContext *mov, AVStream *st)
int64_t current_offset;
int64_t current_dts = 0;
unsigned int stts_index = 0;
- unsigned int ctts_index = 0;
unsigned int stsc_index = 0;
unsigned int stss_index = 0;
unsigned int stps_index = 0;
@@ -2125,7 +2124,6 @@ static void mov_build_index(MOVContext *mov, AVStream *st)
sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
unsigned int current_sample = 0;
unsigned int stts_sample = 0;
- unsigned int ctts_sample = 0;
unsigned int sample_size;
unsigned int distance = 0;
unsigned int rap_group_index = 0;
@@ -2133,6 +2131,8 @@ static void mov_build_index(MOVContext *mov, AVStream *st)
int rap_group_present = sc->rap_group_count && sc->rap_group;
int key_off = (sc->keyframes && sc->keyframes[0] > 0) || (sc->stps_data && sc->stps_data[0] > 0);
+ current_dts -= sc->dts_shift;
+
if (!sc->sample_count)
return;
if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
@@ -2180,15 +2180,14 @@ static void mov_build_index(MOVContext *mov, AVStream *st)
if (sc->pseudo_stream_id == -1 ||
sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
AVIndexEntry *e = &st->index_entries[st->nb_index_entries++];
- int64_t current_cts = current_dts + (sc->ctts_data ? sc->ctts_data[ctts_index].duration : 0);
e->pos = current_offset;
- e->timestamp = current_cts;
+ e->timestamp = current_dts;
e->size = sample_size;
e->min_distance = distance;
e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
- av_dlog(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", cts %"PRId64", "
+ av_dlog(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
"size %d, distance %d, keyframe %d\n", st->index, current_sample,
- current_offset, current_cts, sample_size, distance, keyframe);
+ current_offset, current_dts, sample_size, distance, keyframe);
}
current_offset += sample_size;
@@ -2196,16 +2195,11 @@ static void mov_build_index(MOVContext *mov, AVStream *st)
current_dts += sc->stts_data[stts_index].duration;
distance++;
stts_sample++;
- ctts_sample++;
current_sample++;
if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
stts_sample = 0;
stts_index++;
}
- if (ctts_index + 1 < sc->ctts_count && ctts_sample == sc->ctts_data[ctts_index].count) {
- ctts_sample = 0;
- ctts_index++;
- }
}
}
if (st->duration > 0)
@@ -2795,16 +2789,13 @@ static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
int sample_flags = i ? frag->flags : first_sample_flags;
unsigned sample_duration = frag->duration;
int keyframe = 0;
- int sample_cts = 0;
- int64_t cts;
if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(pb);
if (flags & MOV_TRUN_SAMPLE_SIZE) sample_size = avio_rb32(pb);
if (flags & MOV_TRUN_SAMPLE_FLAGS) sample_flags = avio_rb32(pb);
- if (flags & MOV_TRUN_SAMPLE_CTS) sample_cts = avio_rb32(pb);
- sc->ctts_data[sc->ctts_count].count = 1;
- sc->ctts_data[sc->ctts_count].duration = sample_cts;
- cts = dts + sample_cts;
+ sc->ctts_data[sc->ctts_count].count = 1;
+ sc->ctts_data[sc->ctts_count].duration = (flags & MOV_TRUN_SAMPLE_CTS) ?
+ avio_rb32(pb) : 0;
sc->ctts_count++;
if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
keyframe = 1;
@@ -2814,11 +2805,11 @@ static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES));
if (keyframe)
distance = 0;
- av_add_index_entry(st, offset, cts, sample_size, distance,
+ av_add_index_entry(st, offset, dts, sample_size, distance,
keyframe ? AVINDEX_KEYFRAME : 0);
- av_dlog(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", cts %"PRId64", "
+ av_dlog(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
"size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
- offset, cts, sample_size, distance, keyframe);
+ offset, dts, sample_size, distance, keyframe);
distance++;
dts += sample_duration;
offset += sample_size;
@@ -3344,12 +3335,7 @@ static AVIndexEntry *mov_find_next_sample(AVFormatContext *s, AVStream **st)
MOVStreamContext *msc = avst->priv_data;
if (msc->pb && msc->current_sample < avst->nb_index_entries) {
AVIndexEntry *current_sample = &avst->index_entries[msc->current_sample];
- int64_t dts;
- if (msc->ctts_data)
- dts = av_rescale(current_sample->timestamp - msc->dts_shift - msc->ctts_data[msc->ctts_index].duration,
- AV_TIME_BASE, msc->time_scale);
- else
- dts = av_rescale(current_sample->timestamp, AV_TIME_BASE, msc->time_scale);
+ int64_t dts = av_rescale(current_sample->timestamp, AV_TIME_BASE, msc->time_scale);
av_dlog(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
if (!sample || (!s->pb->seekable && current_sample->pos < sample->pos) ||
(s->pb->seekable &&
@@ -3423,9 +3409,9 @@ static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
}
pkt->stream_index = sc->ffindex;
- pkt->pts = sample->timestamp;
+ pkt->dts = sample->timestamp;
if (sc->ctts_data && sc->ctts_index < sc->ctts_count) {
- pkt->dts = pkt->pts - sc->dts_shift - sc->ctts_data[sc->ctts_index].duration;
+ pkt->pts = pkt->dts + sc->dts_shift + sc->ctts_data[sc->ctts_index].duration;
/* update ctts context */
sc->ctts_sample++;
if (sc->ctts_index < sc->ctts_count &&
@@ -3438,8 +3424,8 @@ static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
} else {
int64_t next_dts = (sc->current_sample < st->nb_index_entries) ?
st->index_entries[sc->current_sample].timestamp : st->duration;
- pkt->dts = pkt->pts;
pkt->duration = next_dts - pkt->dts;
+ pkt->pts = pkt->dts;
}
if (st->discard == AVDISCARD_ALL)
goto retry;
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