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Mon, 28 Mar 2022 05:41:15 -0700 (PDT) From: lance.lmwang@gmail.com To: ffmpeg-devel@ffmpeg.org Date: Mon, 28 Mar 2022 20:41:08 +0800 Message-Id: <1648471271-22016-1-git-send-email-lance.lmwang@gmail.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1648423513-21261-1-git-send-email-lance.lmwang@gmail.com> References: <1648423513-21261-1-git-send-email-lance.lmwang@gmail.com> Subject: [FFmpeg-devel] [PATCH v2 1/4] avutil: add ambient viewing environment metadata side data X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: FFmpeg development discussions and patches Cc: Limin Wang MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Archived-At: List-Archive: List-Post: From: Limin Wang Signed-off-by: Limin Wang --- libavutil/frame.c | 1 + libavutil/frame.h | 6 +++++ libavutil/mastering_display_metadata.c | 23 +++++++++++++++++ libavutil/mastering_display_metadata.h | 45 ++++++++++++++++++++++++++++++++++ 4 files changed, 75 insertions(+) diff --git a/libavutil/frame.c b/libavutil/frame.c index fbb869f..8882da2 100644 --- a/libavutil/frame.c +++ b/libavutil/frame.c @@ -815,6 +815,7 @@ const char *av_frame_side_data_name(enum AVFrameSideDataType type) case AV_FRAME_DATA_DETECTION_BBOXES: return "Bounding boxes for object detection and classification"; case AV_FRAME_DATA_DOVI_RPU_BUFFER: return "Dolby Vision RPU Data"; case AV_FRAME_DATA_DOVI_METADATA: return "Dolby Vision Metadata"; + case AV_FRAME_DATA_AMBIENT_VIEWING_ENV: return "Ambient Viewing Environment"; } return NULL; } diff --git a/libavutil/frame.h b/libavutil/frame.h index 33fac20..f7b1d4e 100644 --- a/libavutil/frame.h +++ b/libavutil/frame.h @@ -209,6 +209,12 @@ enum AVFrameSideDataType { * volume transform - CUVA 005.1-2021. */ AV_FRAME_DATA_DYNAMIC_HDR_VIVID, + + /** + * ambient viewing environment for a video frame, as described by + * the AVAmbientViewingEnvMetadata. + */ + AV_FRAME_DATA_AMBIENT_VIEWING_ENV, }; enum AVActiveFormatDescription { diff --git a/libavutil/mastering_display_metadata.c b/libavutil/mastering_display_metadata.c index 6069347..ba1c80f 100644 --- a/libavutil/mastering_display_metadata.c +++ b/libavutil/mastering_display_metadata.c @@ -64,3 +64,26 @@ AVContentLightMetadata *av_content_light_metadata_create_side_data(AVFrame *fram return (AVContentLightMetadata *)side_data->data; } + +AVAmbientViewingEnvMetadata *av_ambient_viewing_env_metadata_alloc(size_t *size) +{ + AVAmbientViewingEnvMetadata *metadata = av_mallocz(sizeof(*metadata)); + + if (size) + *size = sizeof(*metadata); + + return metadata; +} + +AVAmbientViewingEnvMetadata *av_ambient_viewing_env_metadata_create_side_data(AVFrame *frame) +{ + AVFrameSideData *side_data = av_frame_new_side_data(frame, + AV_FRAME_DATA_AMBIENT_VIEWING_ENV, + sizeof(AVAmbientViewingEnvMetadata)); + if (!side_data) + return NULL; + + memset(side_data->data, 0, sizeof(AVAmbientViewingEnvMetadata)); + + return (AVAmbientViewingEnvMetadata *)side_data->data; +} diff --git a/libavutil/mastering_display_metadata.h b/libavutil/mastering_display_metadata.h index c23b07c..d7598c1 100644 --- a/libavutil/mastering_display_metadata.h +++ b/libavutil/mastering_display_metadata.h @@ -125,4 +125,49 @@ AVContentLightMetadata *av_content_light_metadata_alloc(size_t *size); */ AVContentLightMetadata *av_content_light_metadata_create_side_data(AVFrame *frame); +/** + * The characteristics of the nominal ambient viewing environment for + * the display of the associated video content. + * To be used as payload of a AVFrameSideData the appropriate type. + * + * @note The struct should be allocated with av_ambient_viewing_env_metadata_alloc() + * and its size is not a part of the public ABI. + */ +typedef struct AVAmbientViewingEnvMetadata { + /** + * specifies the environmental illuminance of the ambient viewing + * environment in units of 0.0001 lux. + * ambient_illuminance shall not be equal to 0. + */ + uint32_t ambient_illuminance; + /** + * specify the normalized x and y chromaticity coordinates, respectively, + * of the environmental ambient light in the nominal viewing environment, + * according to the CIE 1931 definition of x and y as specified in ISO + * 11664-1 (see also ISO 11664-3 and CIE 15), in normalized increments of + * 0.00002. The values of ambient_light_x and ambient_light_y shall be in + * the range of 0 to 50000 + */ + uint16_t ambient_light_x; + uint16_t ambient_light_y; +} AVAmbientViewingEnvMetadata; + +/** + * Allocate an AVAmbientViewingEnvMetadata structure and set its fields to + * default values. The resulting struct can be freed using av_freep(). + * + * @return An AVAmbientViewingEnvMetadata filled with default values or NULL + * on failure. + */ +AVAmbientViewingEnvMetadata *av_ambient_viewing_env_metadata_alloc(size_t *size); + +/** + * Allocate a complete AVAmbientViewingEnvMetadata and add it to the frame. + * + * @param frame The frame which side data is added to. + * + * @return The AVAmbientViewingEnvMetadata structure to be filled by caller. + */ +AVAmbientViewingEnvMetadata *av_ambient_viewing_env_metadata_create_side_data(AVFrame *frame); + #endif /* AVUTIL_MASTERING_DISPLAY_METADATA_H */ -- 1.8.3.1 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".