From ac687add84a1a87b0b9460c3cdbbeb9bac02fb34 Mon Sep 17 00:00:00 2001
From: Mark Thompson <sw@jkqxz.net>
Date: Mon, 7 May 2018 23:33:36 +0100
Subject: [PATCH] cbs_h264: Add support for mastering display SEI messages

---
 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 bc1ce1256f..92277e4750 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;
+    uint32_t max_display_mastering_luminance;
+    uint32_t min_display_mastering_luminance;
+} 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 76da801959..ab33cdb69b 100644
--- a/libavcodec/cbs_h2645.c
+++ b/libavcodec/cbs_h2645.c
@@ -428,6 +428,7 @@ 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;