[FFmpeg-devel] [PATCH 2/3] lavc: Add Content Light Level side metadata found in HEVC
Steve Lhomme
robux4 at gmail.com
Fri Mar 31 11:00:22 EEST 2017
These data are necessary when transmitting HDR over HDMI.
--
update the previous patch:
- rename CEA 861.3 to CTA-861.3
- update with MaxCLL/MaxFALL changes in avutil
---
libavcodec/avcodec.h | 7 +++++++
libavcodec/avpacket.c | 1 +
libavcodec/hevc_sei.c | 15 +++++++++++++++
libavcodec/hevcdec.c | 18 ++++++++++++++++++
libavcodec/hevcdec.h | 5 +++++
libavcodec/utils.c | 1 +
libavcodec/version.h | 2 +-
7 files changed, 48 insertions(+), 1 deletion(-)
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 60f7acefbd..6ded74b512 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -1583,6 +1583,13 @@ enum AVPacketSideDataType {
* to the AVSphericalMapping structure.
*/
AV_PKT_DATA_SPHERICAL,
+
+ /**
+ * Content light level (based on CTA-861.3). This metadata should be
+ * associated with a video stream and containts data in the form of the
+ * AVContentLightMetadata struct.
+ */
+ AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
};
#define AV_PKT_DATA_QUALITY_FACTOR AV_PKT_DATA_QUALITY_STATS //DEPRECATED
diff --git a/libavcodec/avpacket.c b/libavcodec/avpacket.c
index 8420d8b258..2c28a26a9a 100644
--- a/libavcodec/avpacket.c
+++ b/libavcodec/avpacket.c
@@ -374,6 +374,7 @@ const char *av_packet_side_data_name(enum AVPacketSideDataType type)
case AV_PKT_DATA_METADATA_UPDATE: return "Metadata Update";
case AV_PKT_DATA_MPEGTS_STREAM_ID: return "MPEGTS Stream ID";
case AV_PKT_DATA_MASTERING_DISPLAY_METADATA: return "Mastering display metadata";
+ case AV_PKT_DATA_CONTENT_LIGHT_LEVEL: return "Content light level metadata";
case AV_PKT_DATA_SPHERICAL: return "Spherical Mapping";
}
return NULL;
diff --git a/libavcodec/hevc_sei.c b/libavcodec/hevc_sei.c
index 8fc026cf1e..bb299d5a9f 100644
--- a/libavcodec/hevc_sei.c
+++ b/libavcodec/hevc_sei.c
@@ -102,6 +102,19 @@ static int decode_nal_sei_mastering_display_info(HEVCContext *s)
return 0;
}
+static int decode_nal_sei_content_light_info(HEVCContext *s)
+{
+ GetBitContext *gb = &s->HEVClc->gb;
+ // Max and average light levels
+ s->max_content_light_level = get_bits_long(gb, 16);
+ s->max_pic_average_light_level = get_bits_long(gb, 16);
+ // As this SEI message comes before the first frame that references it,
+ // initialize the flag to 2 and decrement on IRAP access unit so it
+ // persists for the coded video sequence (e.g., between two IRAPs)
+ s-> sei_content_light_present = 2;
+ return 0;
+}
+
static int decode_nal_sei_frame_packing_arrangement(HEVCContext *s)
{
GetBitContext *gb = &s->HEVClc->gb;
@@ -304,6 +317,8 @@ static int decode_nal_sei_prefix(HEVCContext *s, int type, int size)
}
case SEI_TYPE_MASTERING_DISPLAY_INFO:
return decode_nal_sei_mastering_display_info(s);
+ case SEI_TYPE_CONTENT_LIGHT_LEVEL_INFO:
+ return decode_nal_sei_content_light_info(s);
case SEI_TYPE_ACTIVE_PARAMETER_SETS:
active_parameter_sets(s);
av_log(s->avctx, AV_LOG_DEBUG, "Skipped PREFIX SEI %d\n", type);
diff --git a/libavcodec/hevcdec.c b/libavcodec/hevcdec.c
index ef21595c44..61426979ae 100644
--- a/libavcodec/hevcdec.c
+++ b/libavcodec/hevcdec.c
@@ -2644,6 +2644,24 @@ static int set_side_data(HEVCContext *s)
"min_luminance=%f, max_luminance=%f\n",
av_q2d(metadata->min_luminance), av_q2d(metadata->max_luminance));
}
+ // Decrement the mastering display flag when IRAP frame has no_rasl_output_flag=1
+ // so the side data persists for the entire coded video sequence.
+ if (s->sei_content_light_present > 0 &&
+ IS_IRAP(s) && s->no_rasl_output_flag) {
+ s->sei_content_light_present--;
+ }
+ if (s->sei_content_light_present) {
+ AVContentLightMetadata *metadata =
+ av_content_light_metadata_create_side_data(out);
+ if (!metadata)
+ return AVERROR(ENOMEM);
+ metadata->MaxCLL = s->max_content_light_level;
+ metadata->MaxFALL = s->max_pic_average_light_level;
+
+ av_log(s->avctx, AV_LOG_DEBUG, "Content Light Level Metadata:\n");
+ av_log(s->avctx, AV_LOG_DEBUG, "MaxCLL=%d, MaxFALL=%d\n",
+ metadata->MaxCLL, metadata->MaxFALL);
+ }
if (s->a53_caption) {
AVFrameSideData* sd = av_frame_new_side_data(out,
diff --git a/libavcodec/hevcdec.h b/libavcodec/hevcdec.h
index 0c7881286c..e5879a5c2b 100644
--- a/libavcodec/hevcdec.h
+++ b/libavcodec/hevcdec.h
@@ -596,6 +596,11 @@ typedef struct HEVCContext {
uint32_t max_mastering_luminance;
uint32_t min_mastering_luminance;
+ /* content light level */
+ int sei_content_light_present;
+ uint16_t max_content_light_level;
+ uint16_t max_pic_average_light_level;
+
} HEVCContext;
int ff_hevc_decode_nal_sei(HEVCContext *s);
diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index 3e8677d0f4..8a47a32663 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -771,6 +771,7 @@ int ff_init_buffer_info(AVCodecContext *avctx, AVFrame *frame)
{ AV_PKT_DATA_STEREO3D, AV_FRAME_DATA_STEREO3D },
{ AV_PKT_DATA_AUDIO_SERVICE_TYPE, AV_FRAME_DATA_AUDIO_SERVICE_TYPE },
{ AV_PKT_DATA_MASTERING_DISPLAY_METADATA, AV_FRAME_DATA_MASTERING_DISPLAY_METADATA },
+ { AV_PKT_DATA_CONTENT_LIGHT_LEVEL, AV_FRAME_DATA_CONTENT_LIGHT_LEVEL },
};
if (pkt) {
diff --git a/libavcodec/version.h b/libavcodec/version.h
index 8dea5cb97b..5dbbc703ab 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -29,7 +29,7 @@
#define LIBAVCODEC_VERSION_MAJOR 57
#define LIBAVCODEC_VERSION_MINOR 86
-#define LIBAVCODEC_VERSION_MICRO 103
+#define LIBAVCODEC_VERSION_MICRO 104
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
LIBAVCODEC_VERSION_MINOR, \
--
2.11.1
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