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Merge commit '40ed1cbf147d09fc0894bee160f0b6b6d9159fc5' 

* commit '40ed1cbf147d09fc0894bee160f0b6b6d9159fc5':
  movenc: Allow writing a DASH sidx atom at the start of files

Conflicts:
	libavformat/movenc.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-11-17 23:02:02 +01:00
parent 3fa4351d6b 40ed1cbf14
commit 4dc305d784
2 changed files with 93 additions and 24 deletions
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116
libavformat/movenc.c
View File

@ -3298,7 +3298,8 @@ static int mov_write_tfrf_tags(AVIOContext *pb, MOVMuxContext *mov,
return 0;
}
static int mov_add_tfra_entries(AVIOContext *pb, MOVMuxContext *mov, int tracks)
static int mov_add_tfra_entries(AVIOContext *pb, MOVMuxContext *mov, int tracks,
int size)
{
int i;
for (i = 0; i < mov->nb_streams; i++) {
@ -3317,6 +3318,7 @@ static int mov_add_tfra_entries(AVIOContext *pb, MOVMuxContext *mov, int tracks)
}
info = &track->frag_info[track->nb_frag_info - 1];
info->offset = avio_tell(pb);
info->size = size;
// Try to recreate the original pts for the first packet
// from the fields we have stored
info->time = track->start_dts + track->frag_start +
@ -3406,12 +3408,20 @@ static int mov_write_sidx_tag(AVIOContext *pb,
MOVTrack *track, int ref_size, int total_sidx_size)
{
int64_t pos = avio_tell(pb), offset_pos, end_pos;
int64_t presentation_time = track->start_dts + track->frag_start +
track->cluster[0].cts;
int64_t duration = track->start_dts + track->track_duration -
track->cluster[0].dts;
int64_t offset;
int starts_with_SAP = track->cluster[0].flags & MOV_SYNC_SAMPLE;
int64_t presentation_time, duration, offset;
int starts_with_SAP, i, entries;
if (track->entry) {
entries = 1;
presentation_time = track->start_dts + track->frag_start +
track->cluster[0].cts;
duration = track->start_dts + track->track_duration -
track->cluster[0].dts;
starts_with_SAP = track->cluster[0].flags & MOV_SYNC_SAMPLE;
} else {
entries = track->nb_frag_info;
presentation_time = track->frag_info[0].time;
}
// pts<0 should be cut away using edts
if (presentation_time < 0)
@ -3427,10 +3437,21 @@ static int mov_write_sidx_tag(AVIOContext *pb,
offset_pos = avio_tell(pb);
avio_wb64(pb, 0); /* first_offset (offset to referenced moof) */
avio_wb16(pb, 0); /* reserved */
avio_wb16(pb, 1); /* reference_count */
avio_wb32(pb, (0 << 31) | (ref_size & 0x7fffffff)); /* reference_type (0 = media) | referenced_size */
avio_wb32(pb, duration); /* subsegment_duration */
avio_wb32(pb, (starts_with_SAP << 31) | (0 << 28) | 0); /* starts_with_SAP | SAP_type | SAP_delta_time */
avio_wb16(pb, entries); /* reference_count */
for (i = 0; i < entries; i++) {
if (!track->entry) {
if (i > 1 && track->frag_info[i].offset != track->frag_info[i - 1].offset + track->frag_info[i - 1].size) {
av_log(NULL, AV_LOG_ERROR, "Non-consecutive fragments, writing incorrect sidx\n");
}
duration = track->frag_info[i].duration;
ref_size = track->frag_info[i].size;
starts_with_SAP = 1;
}
avio_wb32(pb, (0 << 31) | (ref_size & 0x7fffffff)); /* reference_type (0 = media) | referenced_size */
avio_wb32(pb, duration); /* subsegment_duration */
avio_wb32(pb, (starts_with_SAP << 31) | (0 << 28) | 0); /* starts_with_SAP | SAP_type | SAP_delta_time */
}
end_pos = avio_tell(pb);
offset = pos + total_sidx_size - end_pos;
@ -3461,7 +3482,10 @@ static int mov_write_sidx_tags(AVIOContext *pb, MOVMuxContext *mov,
MOVTrack *track = &mov->tracks[i];
if (tracks >= 0 && i != tracks)
continue;
if (!track->entry)
// When writing a sidx for the full file, entry is 0, but
// we want to include all tracks. ref_size is 0 in this case,
// since we read it from frag_info instead.
if (!track->entry && ref_size > 0)
continue;
total_size -= mov_write_sidx_tag(avio_buf, track, ref_size,
total_size);
@ -3483,10 +3507,10 @@ static int mov_write_moof_tag(AVIOContext *pb, MOVMuxContext *mov, int tracks,
mov_write_moof_tag_internal(avio_buf, mov, tracks, 0);
moof_size = ffio_close_null_buf(avio_buf);
if (mov->flags & FF_MOV_FLAG_DASH)
if (mov->flags & FF_MOV_FLAG_DASH && !(mov->flags & FF_MOV_FLAG_FASTSTART))
mov_write_sidx_tags(pb, mov, tracks, moof_size + 8 + mdat_size);
if ((ret = mov_add_tfra_entries(pb, mov, tracks)) < 0)
if ((ret = mov_add_tfra_entries(pb, mov, tracks, moof_size + 8 + mdat_size)) < 0)
return ret;
return mov_write_moof_tag_internal(pb, mov, tracks, moof_size);
@ -3507,7 +3531,7 @@ static int mov_write_tfra_tag(AVIOContext *pb, MOVTrack *track)
avio_wb32(pb, track->nb_frag_info);
for (i = 0; i < track->nb_frag_info; i++) {
avio_wb64(pb, track->frag_info[i].time);
avio_wb64(pb, track->frag_info[i].offset);
avio_wb64(pb, track->frag_info[i].offset + track->data_offset);
avio_w8(pb, 1); /* traf number */
avio_w8(pb, 1); /* trun number */
avio_w8(pb, 1); /* sample number */
@ -3622,6 +3646,10 @@ static int mov_write_ftyp_tag(AVIOContext *pb, AVFormatContext *s)
ffio_wfourcc(pb, "MSNV");
else if (mov->mode == MODE_MP4)
ffio_wfourcc(pb, "mp41");
if (mov->flags & FF_MOV_FLAG_DASH && mov->flags & FF_MOV_FLAG_FASTSTART)
ffio_wfourcc(pb, "dash");
return update_size(pb, pos);
}
@ -4498,14 +4526,8 @@ static int mov_write_header(AVFormatContext *s)
mov->flags |= FF_MOV_FLAG_FRAGMENT | FF_MOV_FLAG_EMPTY_MOOV |
FF_MOV_FLAG_DEFAULT_BASE_MOOF;
/* faststart: moov at the beginning of the file, if supported */
if (mov->flags & FF_MOV_FLAG_FASTSTART) {
if (mov->flags & FF_MOV_FLAG_FRAGMENT) {
av_log(s, AV_LOG_WARNING, "The faststart flag is incompatible "
"with fragmentation, disabling faststart\n");
mov->flags &= ~FF_MOV_FLAG_FASTSTART;
} else
mov->reserved_moov_size = -1;
mov->reserved_moov_size = -1;
}
if (mov->use_editlist < 0) {
@ -4804,6 +4826,8 @@ static int mov_write_header(AVFormatContext *s)
if (mov->flags & FF_MOV_FLAG_EMPTY_MOOV) {
mov_write_moov_tag(pb, mov, s);
mov->fragments++;
if (mov->flags & FF_MOV_FLAG_FASTSTART)
mov->reserved_moov_pos = avio_tell(pb);
}
return 0;
@ -4824,6 +4848,18 @@ static int get_moov_size(AVFormatContext *s)
return ffio_close_null_buf(moov_buf);
}
static int get_sidx_size(AVFormatContext *s)
{
int ret;
AVIOContext *buf;
MOVMuxContext *mov = s->priv_data;
if ((ret = ffio_open_null_buf(&buf)) < 0)
return ret;
mov_write_sidx_tags(buf, mov, -1, 0);
return ffio_close_null_buf(buf);
}
/*
* This function gets the moov size if moved to the top of the file: the chunk
* offset table can switch between stco (32-bit entries) to co64 (64-bit
@ -4855,6 +4891,21 @@ static int compute_moov_size(AVFormatContext *s)
return moov_size2;
}
static int compute_sidx_size(AVFormatContext *s)
{
int i, sidx_size;
MOVMuxContext *mov = s->priv_data;
sidx_size = get_sidx_size(s);
if (sidx_size < 0)
return sidx_size;
for (i = 0; i < mov->nb_streams; i++)
mov->tracks[i].data_offset += sidx_size;
return sidx_size;
}
static int shift_data(AVFormatContext *s)
{
int ret = 0, moov_size;
@ -4865,7 +4916,10 @@ static int shift_data(AVFormatContext *s)
int read_size[2];
AVIOContext *read_pb;
moov_size = compute_moov_size(s);
if (mov->flags & FF_MOV_FLAG_FRAGMENT)
moov_size = compute_sidx_size(s);
else
moov_size = compute_moov_size(s);
if (moov_size < 0)
return moov_size;
@ -4992,7 +5046,21 @@ static int mov_write_trailer(AVFormatContext *s)
}
} else {
mov_flush_fragment(s);
mov_write_mfra_tag(pb, mov);
for (i = 0; i < mov->nb_streams; i++)
mov->tracks[i].data_offset = 0;
if (mov->flags & FF_MOV_FLAG_FASTSTART) {
av_log(s, AV_LOG_INFO, "Starting second pass: inserting sidx atoms\n");
res = shift_data(s);
if (res == 0) {
int64_t end = avio_tell(pb);
avio_seek(pb, mov->reserved_moov_pos, SEEK_SET);
mov_write_sidx_tags(pb, mov, -1, 0);
avio_seek(pb, end, SEEK_SET);
mov_write_mfra_tag(pb, mov);
}
} else {
mov_write_mfra_tag(pb, mov);
}
}
for (i = 0; i < mov->nb_streams; i++) {

1
libavformat/movenc.h
View File

@ -74,6 +74,7 @@ typedef struct MOVFragmentInfo {
int64_t time;
int64_t duration;
int64_t tfrf_offset;
int size;
} MOVFragmentInfo;
typedef struct MOVTrack {