[FFmpeg-devel] [PATCH 5/6] cbs_h264: Add support for mastering display SEI messages

[James Almer]

On 5/7/2018 8:11 PM, Mark Thompson wrote:
> ---
>  libavcodec/cbs_h264.h                 | 10 ++++++++++
>  libavcodec/cbs_h2645.c                |  1 +
>  libavcodec/cbs_h264_syntax_template.c | 23 +++++++++++++++++++++++
>  libavcodec/h264_sei.h                 |  1 +
>  4 files changed, 35 insertions(+)
> 
> diff --git a/libavcodec/cbs_h264.h b/libavcodec/cbs_h264.h
> index b9536611ef..c46dd5064c 100644
> --- a/libavcodec/cbs_h264.h
> +++ b/libavcodec/cbs_h264.h
> @@ -306,6 +306,15 @@ typedef struct H264RawSEIDisplayOrientation {
>      uint8_t display_orientation_extension_flag;
>  } H264RawSEIDisplayOrientation;
>  
> +typedef struct H264RawSEIMasteringDisplayColourVolume {
> +    uint16_t display_primaries_x[3];
> +    uint16_t display_primaries_y[3];
> +    uint16_t white_point_x;
> +    uint16_t white_point_y;
> +    uint16_t max_display_mastering_luminance;
> +    uint16_t min_display_mastering_luminance;

These two should be uint32_t.

> +} H264RawSEIMasteringDisplayColourVolume;
> +
>  typedef struct H264RawSEIPayload {
>      uint32_t payload_type;
>      uint32_t payload_size;
> @@ -318,6 +327,7 @@ typedef struct H264RawSEIPayload {
>          H264RawSEIUserDataUnregistered user_data_unregistered;
>          H264RawSEIRecoveryPoint recovery_point;
>          H264RawSEIDisplayOrientation display_orientation;
> +        H264RawSEIMasteringDisplayColourVolume mastering_display_colour_volume;
>          struct {
>              uint8_t *data;
>              size_t data_length;
> diff --git a/libavcodec/cbs_h2645.c b/libavcodec/cbs_h2645.c
> index b8194cb3b1..7354a949cf 100644
> --- a/libavcodec/cbs_h2645.c
> +++ b/libavcodec/cbs_h2645.c
> @@ -427,6 +427,7 @@ static void cbs_h264_free_sei_payload(H264RawSEIPayload *payload)
>      case H264_SEI_TYPE_PAN_SCAN_RECT:
>      case H264_SEI_TYPE_RECOVERY_POINT:
>      case H264_SEI_TYPE_DISPLAY_ORIENTATION:
> +    case H264_SEI_TYPE_MASTERING_DISPLAY_COLOUR_VOLUME:
>          break;
>      case H264_SEI_TYPE_USER_DATA_REGISTERED:
>          av_buffer_unref(&payload->payload.user_data_registered.data_ref);
> diff --git a/libavcodec/cbs_h264_syntax_template.c b/libavcodec/cbs_h264_syntax_template.c
> index fb1685e6e6..027b555db6 100644
> --- a/libavcodec/cbs_h264_syntax_template.c
> +++ b/libavcodec/cbs_h264_syntax_template.c
> @@ -740,6 +740,25 @@ static int FUNC(sei_display_orientation)(CodedBitstreamContext *ctx, RWContext *
>      return 0;
>  }
>  
> +static int FUNC(sei_mastering_display_colour_volume)(CodedBitstreamContext *ctx, RWContext *rw,
> +                                                     H264RawSEIMasteringDisplayColourVolume *current)
> +{
> +    int err, c;
> +
> +    for (c = 0; c < 3; c++) {
> +        us(16, display_primaries_x[c], 0, 50000, 1, c);
> +        us(16, display_primaries_y[c], 0, 50000, 1, c);
> +    }
> +
> +    u(16, white_point_x, 0, 50000);
> +    u(16, white_point_y, 0, 50000);
> +
> +    u(32, max_display_mastering_luminance, 1, MAX_UINT_BITS(32));
> +    u(32, min_display_mastering_luminance, 0, current->max_display_mastering_luminance - 1);
> +
> +    return 0;
> +}
> +
>  static int FUNC(sei_payload)(CodedBitstreamContext *ctx, RWContext *rw,
>                               H264RawSEIPayload *current)
>  {
> @@ -787,6 +806,10 @@ static int FUNC(sei_payload)(CodedBitstreamContext *ctx, RWContext *rw,
>          CHECK(FUNC(sei_display_orientation)
>                (ctx, rw, &current->payload.display_orientation));
>          break;
> +    case H264_SEI_TYPE_MASTERING_DISPLAY_COLOUR_VOLUME:
> +        CHECK(FUNC(sei_mastering_display_colour_volume)
> +              (ctx, rw, &current->payload.mastering_display_colour_volume));
> +        break;
>      default:
>          {
>  #ifdef READ
> diff --git a/libavcodec/h264_sei.h b/libavcodec/h264_sei.h
> index 6455f3cec5..a169a10e49 100644
> --- a/libavcodec/h264_sei.h
> +++ b/libavcodec/h264_sei.h
> @@ -35,6 +35,7 @@ typedef enum {
>      H264_SEI_TYPE_FRAME_PACKING          = 45,  ///< frame packing arrangement
>      H264_SEI_TYPE_DISPLAY_ORIENTATION    = 47,  ///< display orientation
>      H264_SEI_TYPE_GREEN_METADATA         = 56,  ///< GreenMPEG information
> +    H264_SEI_TYPE_MASTERING_DISPLAY_COLOUR_VOLUME = 137,  ///< mastering display properties
>      H264_SEI_TYPE_ALTERNATIVE_TRANSFER   = 147, ///< alternative transfer
>  } H264_SEI_Type;
>  
>