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mastering_display_metadata.h (4284B)

      1 /*
      2 * Copyright (c) 2016 Neil Birkbeck <neil.birkbeck@gmail.com>
      3 *
      4 * This file is part of FFmpeg.
      5 *
      6 * FFmpeg is free software; you can redistribute it and/or
      7 * modify it under the terms of the GNU Lesser General Public
      8 * License as published by the Free Software Foundation; either
      9 * version 2.1 of the License, or (at your option) any later version.
     10 *
     11 * FFmpeg is distributed in the hope that it will be useful,
     12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
     13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14 * Lesser General Public License for more details.
     15 *
     16 * You should have received a copy of the GNU Lesser General Public
     17 * License along with FFmpeg; if not, write to the Free Software
     18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
     19 */
     20 
     21 #ifndef AVUTIL_MASTERING_DISPLAY_METADATA_H
     22 #define AVUTIL_MASTERING_DISPLAY_METADATA_H
     23 
     24 #include "frame.h"
     25 #include "rational.h"
     26 
     27 
     28 /**
     29 * Mastering display metadata capable of representing the color volume of
     30 * the display used to master the content (SMPTE 2086:2014).
     31 *
     32 * To be used as payload of a AVFrameSideData or AVPacketSideData with the
     33 * appropriate type.
     34 *
     35 * @note The struct should be allocated with av_mastering_display_metadata_alloc()
     36 *       and its size is not a part of the public ABI.
     37 */
     38 typedef struct AVMasteringDisplayMetadata {
     39    /**
     40     * CIE 1931 xy chromaticity coords of color primaries (r, g, b order).
     41     */
     42    AVRational display_primaries[3][2];
     43 
     44    /**
     45     * CIE 1931 xy chromaticity coords of white point.
     46     */
     47    AVRational white_point[2];
     48 
     49    /**
     50     * Min luminance of mastering display (cd/m^2).
     51     */
     52    AVRational min_luminance;
     53 
     54    /**
     55     * Max luminance of mastering display (cd/m^2).
     56     */
     57    AVRational max_luminance;
     58 
     59    /**
     60     * Flag indicating whether the display primaries (and white point) are set.
     61     */
     62    int has_primaries;
     63 
     64    /**
     65     * Flag indicating whether the luminance (min_ and max_) have been set.
     66     */
     67    int has_luminance;
     68 
     69 } AVMasteringDisplayMetadata;
     70 
     71 /**
     72 * Allocate an AVMasteringDisplayMetadata structure and set its fields to
     73 * default values. The resulting struct can be freed using av_freep().
     74 *
     75 * @return An AVMasteringDisplayMetadata filled with default values or NULL
     76 *         on failure.
     77 */
     78 AVMasteringDisplayMetadata *av_mastering_display_metadata_alloc(void);
     79 
     80 /**
     81 * Allocate an AVMasteringDisplayMetadata structure and set its fields to
     82 * default values. The resulting struct can be freed using av_freep().
     83 *
     84 * @return An AVMasteringDisplayMetadata filled with default values or NULL
     85 *         on failure.
     86 */
     87 AVMasteringDisplayMetadata *av_mastering_display_metadata_alloc_size(size_t *size);
     88 
     89 /**
     90 * Allocate a complete AVMasteringDisplayMetadata and add it to the frame.
     91 *
     92 * @param frame The frame which side data is added to.
     93 *
     94 * @return The AVMasteringDisplayMetadata structure to be filled by caller.
     95 */
     96 AVMasteringDisplayMetadata *av_mastering_display_metadata_create_side_data(AVFrame *frame);
     97 
     98 /**
     99 * Content light level needed by to transmit HDR over HDMI (CTA-861.3).
    100 *
    101 * To be used as payload of a AVFrameSideData or AVPacketSideData with the
    102 * appropriate type.
    103 *
    104 * @note The struct should be allocated with av_content_light_metadata_alloc()
    105 *       and its size is not a part of the public ABI.
    106 */
    107 typedef struct AVContentLightMetadata {
    108    /**
    109     * Max content light level (cd/m^2).
    110     */
    111    unsigned MaxCLL;
    112 
    113    /**
    114     * Max average light level per frame (cd/m^2).
    115     */
    116    unsigned MaxFALL;
    117 } AVContentLightMetadata;
    118 
    119 /**
    120 * Allocate an AVContentLightMetadata structure and set its fields to
    121 * default values. The resulting struct can be freed using av_freep().
    122 *
    123 * @return An AVContentLightMetadata filled with default values or NULL
    124 *         on failure.
    125 */
    126 AVContentLightMetadata *av_content_light_metadata_alloc(size_t *size);
    127 
    128 /**
    129 * Allocate a complete AVContentLightMetadata and add it to the frame.
    130 *
    131 * @param frame The frame which side data is added to.
    132 *
    133 * @return The AVContentLightMetadata structure to be filled by caller.
    134 */
    135 AVContentLightMetadata *av_content_light_metadata_create_side_data(AVFrame *frame);
    136 
    137 #endif /* AVUTIL_MASTERING_DISPLAY_METADATA_H */