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avformat/mov: read PCM audio configuration box ('pcmC') if available 

For ipcm and fpcm streams, big-endian format is the default, but it can be changed
with additional 'pcmC' sub-atom of audio sample description.

Details can be found in ISO/IEC 23003-5:2020

Fixes ticket #9763.
Fixes ticket #9790.

Patch simplified by Marton Balint.

Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Ivan Baykalov 2022-06-07 15:26:18 +07:00 committed by Marton Balint
parent cd83383f4d
commit cbe216d3a6
1 changed files with 22 additions and 0 deletions
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22
libavformat/mov.c
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@ -1553,6 +1553,9 @@ static void set_last_stream_little_endian(AVFormatContext *fc)
st = fc->streams[fc->nb_streams-1];
switch (st->codecpar->codec_id) {
case AV_CODEC_ID_PCM_S16BE:
st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE;
break;
case AV_CODEC_ID_PCM_S24BE:
st->codecpar->codec_id = AV_CODEC_ID_PCM_S24LE;
break;
@ -1579,6 +1582,24 @@ static int mov_read_enda(MOVContext *c, AVIOContext *pb, MOVAtom atom)
return 0;
}
static int mov_read_pcmc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
int format_flags;
if (atom.size < 6) {
av_log(c->fc, AV_LOG_ERROR, "Empty pcmC box\n");
return AVERROR_INVALIDDATA;
}
avio_r8(pb); // version
avio_rb24(pb); // flags
format_flags = avio_r8(pb);
if (format_flags == 1) // indicates little-endian format. If not present, big-endian format is used
set_last_stream_little_endian(c->fc);
return 0;
}
static int mov_read_colr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
@ -7674,6 +7695,7 @@ static const MOVParseTableEntry mov_default_parse_table[] = {
{ MKTAG('S','A','3','D'), mov_read_SA3D }, /* ambisonic audio box */
{ MKTAG('S','A','N','D'), mov_read_SAND }, /* non diegetic audio box */
{ MKTAG('i','l','o','c'), mov_read_iloc },
{ MKTAG('p','c','m','C'), mov_read_pcmc }, /* PCM configuration box */
{ 0, NULL }
};