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avformat/mov: Populate packet duration using stts atom instead of guessing

Browse source 
Fixes tickets #7855 and #11312.

Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
Darren Mo 2024-11-20 22:27:02 -03:00 • committed by James Almer
parent b328bf8f7e
commit 865c73c86f
11 changed files with 182 additions and 30 deletions
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3
libavformat/isom.h
View file

@ -174,6 +174,7 @@ typedef struct MOVStreamContext {
unsigned int chunk_count;
int64_t *chunk_offsets;
unsigned int stts_count;
unsigned int stts_allocated_size;
MOVStts *stts_data;
unsigned int sdtp_count;
uint8_t *sdtp_data;
@ -188,6 +189,8 @@ typedef struct MOVStreamContext {
unsigned *stps_data; ///< partial sync sample for mpeg-2 open gop
MOVElst *elst_data;
unsigned int elst_count;
int stts_index;
int stts_sample;
int ctts_index;
int ctts_sample;
unsigned int sample_size; ///< may contain value calculated from stsd or value from stsz atom

173
libavformat/mov.c
View file

@ -3518,7 +3518,7 @@ static int mov_read_stts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
MOVStreamContext *sc;
unsigned int i, entries, alloc_size = 0;
unsigned int i, entries;
int64_t duration = 0;
int64_t total_sample_count = 0;
int64_t current_dts = 0;
@ -3552,7 +3552,7 @@ static int mov_read_stts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
unsigned int sample_duration;
unsigned int sample_count;
unsigned int min_entries = FFMIN(FFMAX(i + 1, 1024 * 1024), entries);
MOVStts *stts_data = av_fast_realloc(sc->stts_data, &alloc_size,
MOVStts *stts_data = av_fast_realloc(sc->stts_data, &sc->stts_allocated_size,
min_entries * sizeof(*sc->stts_data));
if (!stts_data) {
av_freep(&sc->stts_data);
@ -3916,11 +3916,15 @@ static int get_edit_list_entry(MOVContext *mov,
static int find_prev_closest_index(AVStream *st,
AVIndexEntry *e_old,
int nb_old,
MOVStts* stts_data,
int64_t stts_count,
MOVCtts* ctts_data,
int64_t ctts_count,
int64_t timestamp_pts,
int flag,
int64_t* index,
int64_t* stts_index,
int64_t* stts_sample,
int64_t* ctts_index,
int64_t* ctts_sample)
{
@ -3963,6 +3967,15 @@ static int find_prev_closest_index(AVStream *st,
// Find out the ctts_index for the found frame.
*ctts_index = 0;
*ctts_sample = 0;
if (stts_data) {
av_assert0(stts_index);
av_assert0(stts_sample);
*stts_index = 0;
*stts_sample = 0;
}
for (index_ctts_count = 0; index_ctts_count < *index; index_ctts_count++) {
if (*ctts_index < ctts_count) {
(*ctts_sample)++;
@ -3971,6 +3984,13 @@ static int find_prev_closest_index(AVStream *st,
*ctts_sample = 0;
}
}
if (stts_data && *stts_index < stts_count) {
(*stts_sample)++;
if (stts_data[*stts_index].count == *stts_sample) {
(*stts_index)++;
*stts_sample = 0;
}
}
}
while (*index >= 0 && (*ctts_index) >= 0 && (*ctts_index) < ctts_count) {
@ -3990,6 +4010,16 @@ static int find_prev_closest_index(AVStream *st,
} else {
(*ctts_sample)--;
}
if (stts_data) {
if (*stts_sample == 0) {
(*stts_index)--;
if (*stts_index >= 0) {
*stts_sample = stts_data[*stts_index].count - 1;
}
} else {
(*stts_sample)--;
}
}
}
}
@ -4063,6 +4093,33 @@ static void fix_index_entry_timestamps(AVStream* st, int end_index, int64_t end_
}
}
static int64_t add_stts_entry(MOVStts** stts_data, unsigned int* stts_count, unsigned int* allocated_size,
int count, int duration)
{
MOVStts *stts_buf_new;
const size_t min_size_needed = (*stts_count + 1) * sizeof(MOVStts);
const size_t requested_size =
min_size_needed > *allocated_size ?
FFMAX(min_size_needed, 2 * (*allocated_size)) :
min_size_needed;
if ((unsigned)(*stts_count) >= UINT_MAX / sizeof(MOVStts) - 1)
return -1;
stts_buf_new = av_fast_realloc(*stts_data, allocated_size, requested_size);
if (!stts_buf_new)
return -1;
*stts_data = stts_buf_new;
stts_buf_new[*stts_count].count = count;
stts_buf_new[*stts_count].duration = duration;
*stts_count = (*stts_count) + 1;
return *stts_count;
}
/**
* Append a new ctts entry to ctts_data.
* Returns the new ctts_count if successful, else returns -1.
@ -4211,6 +4268,10 @@ static void mov_fix_index(MOVContext *mov, AVStream *st)
int nb_old = sti->nb_index_entries;
const AVIndexEntry *e_old_end = e_old + nb_old;
const AVIndexEntry *current = NULL;
MOVStts *stts_data_old = msc->stts_data;
int64_t stts_index_old = 0;
int64_t stts_sample_old = 0;
int64_t stts_count_old = msc->stts_count;
MOVCtts *ctts_data_old = msc->ctts_data;
int64_t ctts_index_old = 0;
int64_t ctts_sample_old = 0;
@ -4220,6 +4281,7 @@ static void mov_fix_index(MOVContext *mov, AVStream *st)
int64_t frame_duration = 0;
int64_t edit_list_dts_counter = 0;
int64_t edit_list_dts_entry_end = 0;
int64_t edit_list_start_stts_sample = 0;
int64_t edit_list_start_ctts_sample = 0;
int64_t curr_cts;
int64_t curr_ctts = 0;
@ -4256,7 +4318,12 @@ static void mov_fix_index(MOVContext *mov, AVStream *st)
sti->index_entries_allocated_size = 0;
sti->nb_index_entries = 0;
// Clean ctts fields of MOVStreamContext
// Clean time to sample fields of MOVStreamContext
msc->stts_data = NULL;
msc->stts_count = 0;
msc->stts_index = 0;
msc->stts_sample = 0;
msc->stts_allocated_size = 0;
msc->ctts_data = NULL;
msc->ctts_count = 0;
msc->ctts_index = 0;
@ -4314,23 +4381,26 @@ static void mov_fix_index(MOVContext *mov, AVStream *st)
search_timestamp = FFMAX(search_timestamp - msc->time_scale, e_old[0].timestamp);
}
if (find_prev_closest_index(st, e_old, nb_old, ctts_data_old, ctts_count_old, search_timestamp, 0,
&index, &ctts_index_old, &ctts_sample_old) < 0) {
if (find_prev_closest_index(st, e_old, nb_old, stts_data_old, stts_count_old, ctts_data_old, ctts_count_old, search_timestamp, 0,
&index, &stts_index_old, &stts_sample_old, &ctts_index_old, &ctts_sample_old) < 0) {
av_log(mov->fc, AV_LOG_WARNING,
"st: %d edit list: %"PRId64" Missing key frame while searching for timestamp: %"PRId64"\n",
st->index, edit_list_index, search_timestamp);
if (find_prev_closest_index(st, e_old, nb_old, ctts_data_old, ctts_count_old, search_timestamp, AVSEEK_FLAG_ANY,
&index, &ctts_index_old, &ctts_sample_old) < 0) {
if (find_prev_closest_index(st, e_old, nb_old, stts_data_old, stts_count_old, ctts_data_old, ctts_count_old, search_timestamp, AVSEEK_FLAG_ANY,
&index, &stts_index_old, &stts_sample_old, &ctts_index_old, &ctts_sample_old) < 0) {
av_log(mov->fc, AV_LOG_WARNING,
"st: %d edit list %"PRId64" Cannot find an index entry before timestamp: %"PRId64".\n",
st->index, edit_list_index, search_timestamp);
index = 0;
stts_index_old = 0;
stts_sample_old = 0;
ctts_index_old = 0;
ctts_sample_old = 0;
}
}
current = e_old + index;
edit_list_start_ctts_sample = ctts_sample_old;
edit_list_start_stts_sample = stts_sample_old;
// Iterate over index and arrange it according to edit list
edit_list_start_encountered = 0;
@ -4346,6 +4416,24 @@ static void mov_fix_index(MOVContext *mov, AVStream *st)
curr_cts = current->timestamp + msc->dts_shift;
curr_ctts = 0;
if (stts_data_old && stts_index_old < stts_count_old) {
stts_sample_old++;
if (stts_sample_old == stts_data_old[stts_index_old].count) {
if (add_stts_entry(&msc->stts_data, &msc->stts_count,
&msc->stts_allocated_size,
stts_data_old[stts_index_old].count - edit_list_start_stts_sample,
stts_data_old[stts_index_old].duration) == -1) {
av_log(mov->fc, AV_LOG_ERROR, "Cannot add STTS entry %"PRId64" - {%"PRId64", %d}\n",
stts_index_old,
stts_data_old[stts_index_old].count - edit_list_start_stts_sample,
stts_data_old[stts_index_old].duration);
break;
}
stts_index_old++;
stts_sample_old = 0;
edit_list_start_stts_sample = 0;
}
}
if (ctts_data_old && ctts_index_old < ctts_count_old) {
curr_ctts = ctts_data_old[ctts_index_old].offset;
av_log(mov->fc, AV_LOG_TRACE, "stts: %"PRId64" ctts: %"PRId64", ctts_index: %"PRId64", ctts_count: %"PRId64"\n",
@ -4460,6 +4548,16 @@ static void mov_fix_index(MOVContext *mov, AVStream *st)
continue;
}
if (ctts_sample_old != 0) {
if (stts_data_old &&
add_stts_entry(&msc->stts_data, &msc->stts_count,
&msc->stts_allocated_size,
stts_sample_old - edit_list_start_stts_sample,
stts_data_old[stts_index_old].duration) == -1) {
av_log(mov->fc, AV_LOG_ERROR, "Cannot add STTS entry %"PRId64" - {%"PRId64", %d}\n",
stts_index_old, stts_sample_old - edit_list_start_stts_sample,
stts_data_old[stts_index_old].duration);
break;
}
if (add_ctts_entry(&msc->ctts_data, &msc->ctts_count,
&msc->ctts_allocated_size,
ctts_sample_old - edit_list_start_ctts_sample,
@ -4497,6 +4595,7 @@ static void mov_fix_index(MOVContext *mov, AVStream *st)
// Free the old index and the old CTTS structures
av_free(e_old);
av_free(stts_data_old);
av_free(ctts_data_old);
av_freep(&frame_duration_buffer);
@ -5213,7 +5312,6 @@ static int mov_read_trak(MOVContext *c, AVIOContext *pb, MOVAtom atom)
av_freep(&sc->chunk_offsets);
av_freep(&sc->sample_sizes);
av_freep(&sc->keyframes);
av_freep(&sc->stts_data);
av_freep(&sc->stps_data);
av_freep(&sc->elst_data);
av_freep(&sc->rap_group);
@ -5686,6 +5784,7 @@ static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
AVStream *st = NULL;
FFStream *sti = NULL;
MOVStreamContext *sc;
MOVStts *stts_data;
MOVCtts *ctts_data;
uint64_t offset;
int64_t dts, pts = AV_NOPTS_VALUE;
@ -5695,7 +5794,7 @@ static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
int64_t prev_dts = AV_NOPTS_VALUE;
int next_frag_index = -1, index_entry_pos;
size_t requested_size;
size_t old_ctts_allocated_size;
size_t old_allocated_size;
AVIndexEntry *new_entries;
MOVFragmentStreamInfo * frag_stream_info;
@ -5816,7 +5915,7 @@ static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
sti->index_entries= new_entries;
requested_size = (sti->nb_index_entries + entries) * sizeof(*sc->ctts_data);
old_ctts_allocated_size = sc->ctts_allocated_size;
old_allocated_size = sc->ctts_allocated_size;
ctts_data = av_fast_realloc(sc->ctts_data, &sc->ctts_allocated_size,
requested_size);
if (!ctts_data)
@ -5826,8 +5925,20 @@ static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
// In case there were samples without ctts entries, ensure they get
// zero valued entries. This ensures clips which mix boxes with and
// without ctts entries don't pickup uninitialized data.
memset((uint8_t*)(sc->ctts_data) + old_ctts_allocated_size, 0,
sc->ctts_allocated_size - old_ctts_allocated_size);
memset((uint8_t*)(sc->ctts_data) + old_allocated_size, 0,
sc->ctts_allocated_size - old_allocated_size);
requested_size = (sti->nb_index_entries + entries) * sizeof(*sc->stts_data);
old_allocated_size = sc->stts_allocated_size;
stts_data = av_fast_realloc(sc->stts_data, &sc->stts_allocated_size,
requested_size);
if (!stts_data)
return AVERROR(ENOMEM);
sc->stts_data = stts_data;
// See the comment for ctts above.
memset((uint8_t*)(sc->stts_data) + old_allocated_size, 0,
sc->stts_allocated_size - old_allocated_size);
if (index_entry_pos < sti->nb_index_entries) {
// Make hole in index_entries and ctts_data for new samples
@ -5838,6 +5949,9 @@ static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
memmove(sc->ctts_data + index_entry_pos + entries,
sc->ctts_data + index_entry_pos,
sizeof(*sc->ctts_data) * (sc->ctts_count - index_entry_pos));
memmove(sc->stts_data + index_entry_pos + entries,
sc->stts_data + index_entry_pos,
sizeof(*sc->stts_data) * (sc->stts_count - index_entry_pos));
if (index_entry_pos < sc->current_sample) {
sc->current_sample += entries;
}
@ -5845,6 +5959,7 @@ static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
sti->nb_index_entries += entries;
sc->ctts_count = sti->nb_index_entries;
sc->stts_count = sti->nb_index_entries;
// Record the index_entry position in frag_index of this fragment
if (frag_stream_info) {
@ -5911,6 +6026,8 @@ static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
sc->ctts_data[index_entry_pos].count = 1;
sc->ctts_data[index_entry_pos].offset = ctts_duration;
sc->stts_data[index_entry_pos].count = 1;
sc->stts_data[index_entry_pos].duration = sample_duration;
index_entry_pos++;
av_log(c->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
@ -5946,9 +6063,14 @@ static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
sc->ctts_data + index_entry_pos + gap,
sizeof(*sc->ctts_data) *
(sc->ctts_count - (index_entry_pos + gap)));
memmove(sc->stts_data + index_entry_pos,
sc->stts_data + index_entry_pos + gap,
sizeof(*sc->stts_data) *
(sc->stts_count - (index_entry_pos + gap)));
sti->nb_index_entries -= gap;
sc->ctts_count -= gap;
sc->stts_count -= gap;
if (index_entry_pos < sc->current_sample) {
sc->current_sample -= gap;
}
@ -10720,6 +10842,17 @@ static int mov_finalize_packet(AVFormatContext *s, AVStream *st, AVIndexEntry *s
if (sample->flags & AVINDEX_DISCARD_FRAME) {
pkt->flags |= AV_PKT_FLAG_DISCARD;
}
if (sc->stts_data && sc->stts_index < sc->stts_count) {
pkt->duration = sc->stts_data[sc->stts_index].duration;
/* update stts context */
sc->stts_sample++;
if (sc->stts_index < sc->stts_count &&
sc->stts_data[sc->stts_index].count == sc->stts_sample) {
sc->stts_index++;
sc->stts_sample = 0;
}
}
if (sc->ctts_data && sc->ctts_index < sc->ctts_count) {
pkt->pts = av_sat_add64(pkt->dts, av_sat_add64(sc->dts_shift, sc->ctts_data[sc->ctts_index].offset));
@ -10731,11 +10864,12 @@ static int mov_finalize_packet(AVFormatContext *s, AVStream *st, AVIndexEntry *s
sc->ctts_sample = 0;
}
} else {
if (pkt->duration == 0) {
int64_t next_dts = (sc->current_sample < ffstream(st)->nb_index_entries) ?
ffstream(st)->index_entries[sc->current_sample].timestamp : st->duration;
if (next_dts >= pkt->dts)
pkt->duration = next_dts - pkt->dts;
}
pkt->pts = pkt->dts;
}
@ -11031,6 +11165,19 @@ static int mov_seek_stream(AVFormatContext *s, AVStream *st, int64_t timestamp,
mov_current_sample_set(sc, sample);
av_log(s, AV_LOG_TRACE, "stream %d, found sample %d\n", st->index, sc->current_sample);
/* adjust stts index */
if (sc->stts_data) {
time_sample = 0;
for (i = 0; i < sc->stts_count; i++) {
int next = time_sample + sc->stts_data[i].count;
if (next > sc->current_sample) {
sc->stts_index = i;
sc->stts_sample = sc->current_sample - time_sample;
break;
}
time_sample = next;
}
}
/* adjust ctts index */
if (sc->ctts_data) {
time_sample = 0;

4
tests/ref/fate/copy-trac236
View file

@ -1,5 +1,5 @@
ca4068319c6586de757c1f6a592b31e5 *tests/data/fate/copy-trac236.mov
630918 tests/data/fate/copy-trac236.mov
3e3497985d54991e09f82ca3dd7eda79 *tests/data/fate/copy-trac236.mov
630910 tests/data/fate/copy-trac236.mov
#tb 0: 100/2997
#media_type 0: video
#codec_id 0: rawvideo

1
tests/ref/fate/filter-fps
View file

@ -91,3 +91,4 @@
0, 85, 85, 1, 30576, 0xd4150aad
0, 86, 86, 1, 30576, 0xd4150aad
0, 87, 87, 1, 30576, 0xd4150aad
0, 88, 88, 1, 30576, 0xd4150aad

1
tests/ref/fate/filter-fps-cfr
View file

@ -91,3 +91,4 @@
0, 85, 85, 1, 30576, 0xd4150aad
0, 86, 86, 1, 30576, 0xd4150aad
0, 87, 87, 1, 30576, 0xd4150aad
0, 88, 88, 1, 30576, 0xd4150aad

4
tests/ref/fate/filter-meta-4560-rotate0
View file

@ -1,5 +1,5 @@
dc213aee944a55af2f41950921fd62d7 *tests/data/fate/filter-meta-4560-rotate0.mov
347433 tests/data/fate/filter-meta-4560-rotate0.mov
6cd6b45a88881e85dfe7ad9582ffbeff *tests/data/fate/filter-meta-4560-rotate0.mov
347425 tests/data/fate/filter-meta-4560-rotate0.mov
#tb 0: 1/30
#media_type 0: video
#codec_id 0: rawvideo

2
tests/ref/fate/gaplessenc-itunes-to-ipod-aac
View file

@ -22,7 +22,7 @@ packet|pts=98304|dts=98304|duration=1024|flags=K__
packet|pts=99328|dts=99328|duration=1024|flags=K__
packet|pts=100352|dts=100352|duration=1024|flags=K__
packet|pts=101376|dts=101376|duration=1024|flags=K__
packet|pts=102400|dts=102400|duration=926|flags=K__
packet|pts=102400|dts=102400|duration=960|flags=K__
stream|nb_read_packets=102
frame|pts=0|pkt_dts=0|best_effort_timestamp=0|nb_samples=1024
frame|pts=1024|pkt_dts=1024|best_effort_timestamp=1024|nb_samples=1024

4
tests/ref/fate/matroska-dovi-write-config8
View file

@ -1,5 +1,5 @@
3bd4b07d5af6153516e4c0e66a71c8c9 *tests/data/fate/matroska-dovi-write-config8.matroska
3600607 tests/data/fate/matroska-dovi-write-config8.matroska
593bb650a937b25b87de3079ee7d1517 *tests/data/fate/matroska-dovi-write-config8.matroska
3600617 tests/data/fate/matroska-dovi-write-config8.matroska
#extradata 0: 551, 0xb1ddcd66
#extradata 1: 2, 0x00340022
#tb 0: 1/1000

6
tests/ref/fate/matroska-non-rotation-displaymatrix
View file

@ -1,12 +1,12 @@
3d9eac5b7551c5d644443a70451c809c *tests/data/fate/matroska-non-rotation-displaymatrix.matroska
7860 tests/data/fate/matroska-non-rotation-displaymatrix.matroska
7294b73bcb1cd5059b8f413e2a4dab5b *tests/data/fate/matroska-non-rotation-displaymatrix.matroska
7866 tests/data/fate/matroska-non-rotation-displaymatrix.matroska
#extradata 0: 34, 0xc1d10b51
#tb 0: 1/1000
#media_type 0: video
#codec_id 0: h264
#dimensions 0: 160x240
#sar 0: 1/2
0, -33, 0, 33, 4133, 0xc48cf152
0, -33, 0, 27, 4133, 0xc48cf152
0, 0, 60, 33, 1077, 0x15a71a8a, F=0x0
0, 27, 27, 33, 355, 0x1ee8b91a, F=0x0
0, 60, 127, 33, 1110, 0x4e1a2b12, F=0x0

2
tests/ref/fate/mov-aac-2048-priming
View file

@ -214,4 +214,4 @@ packet|codec_type=audio|stream_index=0|pts=215040|pts_time=4.876190|dts=215040|d
packet|codec_type=audio|stream_index=0|pts=216064|pts_time=4.899410|dts=216064|dts_time=4.899410|duration=1024|duration_time=0.023220|size=203|pos=42900|flags=K__
packet|codec_type=audio|stream_index=0|pts=217088|pts_time=4.922630|dts=217088|dts_time=4.922630|duration=1024|duration_time=0.023220|size=198|pos=43103|flags=K__
packet|codec_type=audio|stream_index=0|pts=218112|pts_time=4.945850|dts=218112|dts_time=4.945850|duration=1024|duration_time=0.023220|size=284|pos=43301|flags=K__
packet|codec_type=audio|stream_index=0|pts=219136|pts_time=4.969070|dts=219136|dts_time=4.969070|duration=1364|duration_time=0.030930|size=5|pos=43585|flags=K__
packet|codec_type=audio|stream_index=0|pts=219136|pts_time=4.969070|dts=219136|dts_time=4.969070|duration=340|duration_time=0.007710|size=5|pos=43585|flags=K__

4
tests/ref/fate/mov-zombie
View file

@ -1,6 +1,6 @@
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