[FFmpeg-cvslog] avformat/mov: add support for 'amve' ambient viewing environment box
Damiano Galassi
git at videolan.org
Sun Feb 4 19:07:01 EET 2024
ffmpeg | branch: master | Damiano Galassi <damiog at gmail.com> | Sun Feb 4 15:14:12 2024 +0000| [112d3618ca47ac7a8243bb16eebdb2c4460d06d1] | committer: James Almer
avformat/mov: add support for 'amve' ambient viewing environment box
As defined in ISOBMFF (ISO/IEC 14496-12) document.
Co-Authored-By: Cosmin Stejerean <cosmin at cosmin.at>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=112d3618ca47ac7a8243bb16eebdb2c4460d06d1
---
libavformat/dump.c | 15 +++++++++++++++
libavformat/isom.h | 3 +++
libavformat/mov.c | 35 +++++++++++++++++++++++++++++++++++
libavformat/movenc.c | 28 ++++++++++++++++++++++++++++
4 files changed, 81 insertions(+)
diff --git a/libavformat/dump.c b/libavformat/dump.c
index aff51b43f6..add38914f2 100644
--- a/libavformat/dump.c
+++ b/libavformat/dump.c
@@ -28,6 +28,7 @@
#include "libavutil/intreadwrite.h"
#include "libavutil/log.h"
#include "libavutil/mastering_display_metadata.h"
+#include "libavutil/ambient_viewing_environment.h"
#include "libavutil/dovi_meta.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.h"
@@ -379,6 +380,17 @@ static void dump_content_light_metadata(void *ctx, const AVPacketSideData *sd,
metadata->MaxCLL, metadata->MaxFALL);
}
+static void dump_ambient_viewing_environment_metadata(void *ctx, const AVPacketSideData *sd)
+{
+ const AVAmbientViewingEnvironment *ambient =
+ (const AVAmbientViewingEnvironment *)sd->data;
+ av_log(ctx, AV_LOG_INFO, "Ambient Viewing Environment, "
+ "ambient_illuminance=%f, ambient_light_x=%f, ambient_light_y=%f",
+ av_q2d(ambient->ambient_illuminance),
+ av_q2d(ambient->ambient_light_x),
+ av_q2d(ambient->ambient_light_y));
+}
+
static void dump_spherical(void *ctx, const AVCodecParameters *par,
const AVPacketSideData *sd, int log_level)
{
@@ -513,6 +525,9 @@ static void dump_sidedata(void *ctx, const AVStream *st, const char *indent,
av_log(ctx, log_level, "SMPTE ST 12-1:2014: ");
dump_s12m_timecode(ctx, st, sd, log_level);
break;
+ case AV_PKT_DATA_AMBIENT_VIEWING_ENVIRONMENT:
+ dump_ambient_viewing_environment_metadata(ctx, sd);
+ break;
default:
av_log(ctx, log_level, "unknown side data type %d "
"(%"SIZE_SPECIFIER" bytes)", sd->type, sd->size);
diff --git a/libavformat/isom.h b/libavformat/isom.h
index 77221d06e4..a4cca4c798 100644
--- a/libavformat/isom.h
+++ b/libavformat/isom.h
@@ -29,6 +29,7 @@
#include "libavutil/encryption_info.h"
#include "libavutil/mastering_display_metadata.h"
+#include "libavutil/ambient_viewing_environment.h"
#include "libavutil/spherical.h"
#include "libavutil/stereo3d.h"
@@ -249,6 +250,8 @@ typedef struct MOVStreamContext {
AVMasteringDisplayMetadata *mastering;
AVContentLightMetadata *coll;
size_t coll_size;
+ AVAmbientViewingEnvironment *ambient;
+ size_t ambient_size;
uint32_t format;
diff --git a/libavformat/mov.c b/libavformat/mov.c
index 5fae777adb..42b0135987 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -6039,6 +6039,31 @@ static int mov_read_clli(MOVContext *c, AVIOContext *pb, MOVAtom atom)
return 0;
}
+static int mov_read_amve(MOVContext *c, AVIOContext *pb, MOVAtom atom)
+{
+ MOVStreamContext *sc;
+ const int illuminance_den = 10000;
+ const int ambient_den = 50000;
+ if (c->fc->nb_streams < 1)
+ return AVERROR_INVALIDDATA;
+ sc = c->fc->streams[c->fc->nb_streams - 1]->priv_data;
+ if (atom.size < 6) {
+ av_log(c->fc, AV_LOG_ERROR, "Empty Ambient Viewing Environment Info box\n");
+ return AVERROR_INVALIDDATA;
+ }
+ if (sc->ambient){
+ av_log(c->fc, AV_LOG_WARNING, "Ignoring duplicate AMVE\n");
+ return 0;
+ }
+ sc->ambient = av_ambient_viewing_environment_alloc(&sc->ambient_size);
+ if (!sc->ambient)
+ return AVERROR(ENOMEM);
+ sc->ambient->ambient_illuminance = av_make_q(avio_rb32(pb), illuminance_den);
+ sc->ambient->ambient_light_x = av_make_q(avio_rb16(pb), ambient_den);
+ sc->ambient->ambient_light_y = av_make_q(avio_rb16(pb), ambient_den);
+ return 0;
+}
+
static int mov_read_st3d(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
@@ -8215,6 +8240,7 @@ static const MOVParseTableEntry mov_default_parse_table[] = {
{ MKTAG('i','s','p','e'), mov_read_ispe },
{ 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 */
{ 0, NULL }
};
@@ -8680,6 +8706,7 @@ static void mov_free_stream_context(AVFormatContext *s, AVStream *st)
av_freep(&sc->spherical);
av_freep(&sc->mastering);
av_freep(&sc->coll);
+ av_freep(&sc->ambient);
}
static int mov_read_close(AVFormatContext *s)
@@ -9072,6 +9099,14 @@ static int mov_read_header(AVFormatContext *s)
sc->coll = NULL;
}
+ if (sc->ambient) {
+ if (!av_packet_side_data_add(&st->codecpar->coded_side_data, &st->codecpar->nb_coded_side_data,
+ AV_PKT_DATA_AMBIENT_VIEWING_ENVIRONMENT,
+ (uint8_t *) sc->ambient, sc->ambient_size, 0))
+ return AVERROR(ENOMEM);
+
+ sc->ambient = NULL;
+ }
break;
}
}
diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index 9e37781000..40473fdf56 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -2244,6 +2244,33 @@ static int mov_write_mdcv_tag(AVIOContext *pb, MOVTrack *track)
return 32;
}
+static int mov_write_amve_tag(AVIOContext *pb, MOVTrack *track)
+{
+ const int illuminance_den = 10000;
+ const int ambient_den = 50000;
+ const AVPacketSideData *side_data;
+ const AVAmbientViewingEnvironment *ambient;
+
+
+ side_data = av_packet_side_data_get(track->st->codecpar->coded_side_data,
+ track->st->codecpar->nb_coded_side_data,
+ AV_PKT_DATA_AMBIENT_VIEWING_ENVIRONMENT);
+
+ if (!side_data)
+ return 0;
+
+ ambient = (const AVAmbientViewingEnvironment*)side_data->data;
+ if (!ambient || !ambient->ambient_illuminance.num)
+ return 0;
+
+ avio_wb32(pb, 16); // size
+ ffio_wfourcc(pb, "amve");
+ avio_wb32(pb, rescale_rational(ambient->ambient_illuminance, illuminance_den));
+ avio_wb16(pb, rescale_rational(ambient->ambient_light_x, ambient_den));
+ avio_wb16(pb, rescale_rational(ambient->ambient_light_y, ambient_den));
+ return 16;
+}
+
static void find_compressor(char * compressor_name, int len, MOVTrack *track)
{
AVDictionaryEntry *encoder;
@@ -2457,6 +2484,7 @@ static int mov_write_video_tag(AVFormatContext *s, AVIOContext *pb, MOVMuxContex
if (track->mode == MODE_MOV || track->mode == MODE_MP4) {
mov_write_clli_tag(pb, track);
mov_write_mdcv_tag(pb, track);
+ mov_write_amve_tag(pb, track);
}
if (track->mode == MODE_MP4 && mov->fc->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
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