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mov: support the Color Parameter Atoms 'colr'

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This commit is contained in:
Vittorio Giovara 2014-10-02 14:28:35 +01:00
parent 586ea0379c
commit 0d8a3656ba
1 changed files with 69 additions and 0 deletions
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69
libavformat/mov.c
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@ -887,6 +887,74 @@ static int mov_read_enda(MOVContext *c, AVIOContext *pb, MOVAtom atom)
return 0;
}
static int mov_read_colr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
char color_parameter_type[5] = { 0 };
int color_primaries, color_trc, color_matrix;
if (c->fc->nb_streams < 1)
return 0;
st = c->fc->streams[c->fc->nb_streams - 1];
avio_read(pb, color_parameter_type, 4);
if (strncmp(color_parameter_type, "nclx", 4) &&
strncmp(color_parameter_type, "nclc", 4)) {
av_log(c->fc, AV_LOG_WARNING, "unsupported color_parameter_type %s\n",
color_parameter_type);
return 0;
}
color_primaries = avio_rb16(pb);
color_trc = avio_rb16(pb);
color_matrix = avio_rb16(pb);
av_dlog(c->fc, "%s: pri %"PRIu16" trc %"PRIu16" matrix %"PRIu16"",
color_parameter_type, color_primaries, color_trc, color_matrix);
if (c->isom) {
uint8_t color_range = avio_r8(pb) >> 7;
av_dlog(c->fc, " full %"PRIu8"", color_range)
if (color_range)
st->codec->color_range = AVCOL_RANGE_JPEG;
else
st->codec->color_range = AVCOL_RANGE_MPEG;
/* 14496-12 references JPEG XR specs (rather than the more complete
* 23001-8) so some adjusting is required */
if (color_primaries >= AVCOL_PRI_FILM)
color_primaries = AVCOL_PRI_UNSPECIFIED;
if (color_trc >= AVCOL_TRC_LINEAR || color_trc <= AVCOL_TRC_LOG_SQRT ||
color_trc >= AVCOL_TRC_BT2020_10)
color_trc = AVCOL_TRC_UNSPECIFIED;
if (color_matrix >= AVCOL_SPC_BT2020_NCL)
color_matrix = AVCOL_SPC_UNSPECIFIED;
st->codec->color_primaries = color_primaries;
st->codec->color_trc = color_trc;
st->codec->colorspace = color_matrix;
} else {
/* color primaries, Table 4-4 */
switch (color_primaries) {
case 1: st->codec->color_primaries = AVCOL_PRI_BT709; break;
case 5: st->codec->color_primaries = AVCOL_PRI_SMPTE170M; break;
case 6: st->codec->color_primaries = AVCOL_PRI_SMPTE240M; break;
}
/* color transfer, Table 4-5 */
switch (color_trc) {
case 1: st->codec->color_trc = AVCOL_TRC_BT709; break;
case 7: st->codec->color_trc = AVCOL_TRC_SMPTE240M; break;
}
/* color matrix, Table 4-6 */
switch (color_matrix) {
case 1: st->codec->colorspace = AVCOL_SPC_BT709; break;
case 6: st->codec->colorspace = AVCOL_SPC_BT470BG; break;
case 7: st->codec->colorspace = AVCOL_SPC_SMPTE240M; break;
}
}
av_dlog(c->fc, "\n")
return 0;
}
static int mov_read_fiel(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
@ -2765,6 +2833,7 @@ static const MOVParseTableEntry mov_default_parse_table[] = {
{ MKTAG('a','v','s','s'), mov_read_extradata },
{ MKTAG('c','h','p','l'), mov_read_chpl },
{ MKTAG('c','o','6','4'), mov_read_stco },
{ MKTAG('c','o','l','r'), mov_read_colr },
{ MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
{ MKTAG('d','i','n','f'), mov_read_default },
{ MKTAG('d','r','e','f'), mov_read_dref },