From 6dd832673ba7b9d0dd63f5632a9b18a3e5168a62 Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Fri, 23 Feb 2024 10:12:46 +0100
Subject: [PATCH] lavc: add content light/mastering display side data wrappers

---
 libavcodec/decode.c | 25 +++++++++++++++++++++++++
 libavcodec/decode.h | 21 +++++++++++++++++++++
 2 files changed, 46 insertions(+)

diff --git a/libavcodec/decode.c b/libavcodec/decode.c
index 004de9fede..4168cf6f2d 100644
--- a/libavcodec/decode.c
+++ b/libavcodec/decode.c
@@ -35,6 +35,7 @@
 #include "libavutil/hwcontext.h"
 #include "libavutil/imgutils.h"
 #include "libavutil/internal.h"
+#include "libavutil/mastering_display_metadata.h"
 
 #include "avcodec.h"
 #include "avcodec_internal.h"
@@ -1857,6 +1858,30 @@ finish:
     return ret;
 }
 
+int ff_decode_mastering_display_new(const AVCodecContext *avctx, AVFrame *frame,
+                                    AVMasteringDisplayMetadata **mdm)
+{
+    if (side_data_pref(avctx, frame, AV_FRAME_DATA_MASTERING_DISPLAY_METADATA)) {
+        *mdm = NULL;
+        return 0;
+    }
+
+    *mdm = av_mastering_display_metadata_create_side_data(frame);
+    return *mdm ? 0 : AVERROR(ENOMEM);
+}
+
+int ff_decode_content_light_new(const AVCodecContext *avctx, AVFrame *frame,
+                                AVContentLightMetadata **clm)
+{
+    if (side_data_pref(avctx, frame, AV_FRAME_DATA_CONTENT_LIGHT_LEVEL)) {
+        *clm = NULL;
+        return 0;
+    }
+
+    *clm = av_content_light_metadata_create_side_data(frame);
+    return *clm ? 0 : AVERROR(ENOMEM);
+}
+
 int ff_copy_palette(void *dst, const AVPacket *src, void *logctx)
 {
     size_t size;
diff --git a/libavcodec/decode.h b/libavcodec/decode.h
index b269b5a43b..4ffbd9db8e 100644
--- a/libavcodec/decode.h
+++ b/libavcodec/decode.h
@@ -175,4 +175,25 @@ int ff_frame_new_side_data_from_buf(const AVCodecContext *avctx,
                                     AVFrame *frame, enum AVFrameSideDataType type,
                                     AVBufferRef **buf, AVFrameSideData **sd);
 
+struct AVMasteringDisplayMetadata;
+struct AVContentLightMetadata;
+
+/**
+ * Wrapper around av_mastering_display_metadata_create_side_data(), which
+ * rejects side data overridden by the demuxer. Returns 0 on success, and a
+ * negative error code otherwise. If successful, *mdm may either be a pointer to
+ * the new side data, or NULL in case the side data was already present.
+ */
+int ff_decode_mastering_display_new(const AVCodecContext *avctx, AVFrame *frame,
+                                    struct AVMasteringDisplayMetadata **mdm);
+
+/**
+ * Wrapper around av_content_light_metadata_create_side_data(), which
+ * rejects side data overridden by the demuxer. Returns 0 on success, and a
+ * negative error code otherwise. If successful, *clm may either be a pointer to
+ * the new side data, or NULL in case the side data was already present.
+ */
+int ff_decode_content_light_new(const AVCodecContext *avctx, AVFrame *frame,
+                                struct AVContentLightMetadata **clm);
+
 #endif /* AVCODEC_DECODE_H */