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avformat/mov: add support for reading Mastering Display Metadata Box

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As defined in "VP Codec ISO Media File Format Binding v1.0"
https://github.com/webmproject/vp9-dash/blob/master/VPCodecISOMediaFileFormatBinding.md

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer 2017-04-22 00:03:21 -03:00
parent ac8dfcbd89
commit ab05bd6e6c
2 changed files with 59 additions and 0 deletions
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2
libavformat/isom.h
View File

@ -27,6 +27,7 @@
#include <stddef.h>
#include <stdint.h>
#include "libavutil/mastering_display_metadata.h"
#include "libavutil/spherical.h"
#include "libavutil/stereo3d.h"
@ -194,6 +195,7 @@ typedef struct MOVStreamContext {
AVStereo3D *stereo3d;
AVSphericalMapping *spherical;
size_t spherical_size;
AVMasteringDisplayMetadata *mastering;
uint32_t format;

57
libavformat/mov.c
View File

@ -4612,6 +4612,52 @@ static int mov_read_tmcd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
return 0;
}
static int mov_read_smdm(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
MOVStreamContext *sc;
const int chroma_den = 50000;
const int luma_den = 10000;
int i, j, version;
if (c->fc->nb_streams < 1)
return AVERROR_INVALIDDATA;
sc = c->fc->streams[c->fc->nb_streams - 1]->priv_data;
if (atom.size < 5) {
av_log(c->fc, AV_LOG_ERROR, "Empty Mastering Display Metadata box\n");
return AVERROR_INVALIDDATA;
}
version = avio_r8(pb);
if (version) {
av_log(c->fc, AV_LOG_WARNING, "Unsupported Mastering Display Metadata box version %d\n", version);
return 0;
}
avio_skip(pb, 3); /* flags */
sc->mastering = av_mastering_display_metadata_alloc();
if (!sc->mastering)
return AVERROR(ENOMEM);
for (i = 0; i < 3; i++)
for (j = 0; j < 2; j++)
sc->mastering->display_primaries[i][j] =
av_make_q(lrint(((double)avio_rb16(pb) / (1 << 16)) * chroma_den), chroma_den);
for (i = 0; i < 2; i++)
sc->mastering->white_point[i] =
av_make_q(lrint(((double)avio_rb16(pb) / (1 << 16)) * chroma_den), chroma_den);
sc->mastering->max_luminance =
av_make_q(lrint(((double)avio_rb32(pb) / (1 << 8)) * luma_den), luma_den);
sc->mastering->min_luminance =
av_make_q(lrint(((double)avio_rb32(pb) / (1 << 14)) * luma_den), luma_den);
sc->mastering->has_primaries = 1;
sc->mastering->has_luminance = 1;
return 0;
}
static int mov_read_st3d(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
@ -5398,6 +5444,7 @@ static const MOVParseTableEntry mov_default_parse_table[] = {
{ MKTAG('s','t','3','d'), mov_read_st3d }, /* stereoscopic 3D video box */
{ MKTAG('s','v','3','d'), mov_read_sv3d }, /* spherical video box */
{ MKTAG('d','O','p','s'), mov_read_dops },
{ MKTAG('S','m','D','m'), mov_read_smdm },
{ 0, NULL }
};
@ -5822,6 +5869,7 @@ static int mov_read_close(AVFormatContext *s)
av_freep(&sc->stereo3d);
av_freep(&sc->spherical);
av_freep(&sc->mastering);
}
if (mov->dv_demux) {
@ -6172,6 +6220,15 @@ static int mov_read_header(AVFormatContext *s)
sc->spherical = NULL;
}
if (sc->mastering) {
err = av_stream_add_side_data(st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
(uint8_t *)sc->mastering,
sizeof(*sc->mastering));
if (err < 0)
return err;
sc->mastering = NULL;
}
break;
}
}