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avformat/mov: add support for lhvC box parsing

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Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer 2024-06-06 15:49:05 -03:00
parent cbfbacff20
commit c657c694e3
1 changed files with 48 additions and 0 deletions
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48
libavformat/mov.c
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@ -8157,6 +8157,53 @@ static int mov_read_dvcc_dvvc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
return ff_isom_parse_dvcc_dvvc(c->fc, st, buf, read_size);
}
static int mov_read_lhvc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
uint8_t *buf;
int ret, old_size, num_arrays;
if (c->fc->nb_streams < 1)
return 0;
st = c->fc->streams[c->fc->nb_streams-1];
if (!st->codecpar->extradata_size)
// TODO: handle lhvC when present before hvcC
return 0;
if (atom.size < 6 || st->codecpar->extradata_size < 23)
return AVERROR_INVALIDDATA;
buf = av_malloc(atom.size + AV_INPUT_BUFFER_PADDING_SIZE);
if (!buf)
return AVERROR(ENOMEM);
memset(buf + atom.size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
ret = ffio_read_size(pb, buf, atom.size);
if (ret < 0) {
av_free(buf);
av_log(c->fc, AV_LOG_WARNING, "lhvC atom truncated\n");
return 0;
}
num_arrays = buf[5];
old_size = st->codecpar->extradata_size;
atom.size -= 8 /* account for mov_realloc_extradata offseting */
+ 6 /* lhvC bytes before the arrays*/;
ret = mov_realloc_extradata(st->codecpar, atom);
if (ret < 0) {
av_free(buf);
return ret;
}
st->codecpar->extradata[22] += num_arrays;
memcpy(st->codecpar->extradata + old_size, buf + 6, atom.size + 8);
av_free(buf);
return 0;
}
static int mov_read_kind(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVFormatContext *ctx = c->fc;
@ -8952,6 +8999,7 @@ static const MOVParseTableEntry mov_default_parse_table[] = {
{ MKTAG('i','p','r','p'), mov_read_iprp },
{ MKTAG('i','i','n','f'), mov_read_iinf },
{ MKTAG('a','m','v','e'), mov_read_amve }, /* ambient viewing environment box */
{ MKTAG('l','h','v','C'), mov_read_lhvc },
#if CONFIG_IAMFDEC
{ MKTAG('i','a','c','b'), mov_read_iacb },
#endif