[FFmpeg-devel] [PATCH 1/2] lavu: add a gamma field to AVMasteringDisplayMetadata

[Rostislav Pehlivanov]

PNG exposes it and its required in order to correctly display some images,
particularly images crafted to contain 2 different images which appear
differently depending on whether the gamma has been taken into account.

Signed-off-by: Rostislav Pehlivanov <atomnuker at gmail.com>
---
 libavutil/mastering_display_metadata.h | 10 ++++++++++
 libavutil/version.h                    |  2 +-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/libavutil/mastering_display_metadata.h b/libavutil/mastering_display_metadata.h
index 847b0b62c6..3de58bf468 100644
--- a/libavutil/mastering_display_metadata.h
+++ b/libavutil/mastering_display_metadata.h
@@ -66,6 +66,16 @@ typedef struct AVMasteringDisplayMetadata {
      */
     int has_luminance;
 
+    /**
+     * The power-law response exponent needed to compensate for nonlinearity.
+     */
+    AVRational gamma;
+
+    /**
+     * Flag indicating whether the gamma has been set.
+     */
+    int has_gamma;
+
 } AVMasteringDisplayMetadata;
 
 /**
diff --git a/libavutil/version.h b/libavutil/version.h
index d99eff5d15..8ac41f49f5 100644
--- a/libavutil/version.h
+++ b/libavutil/version.h
@@ -80,7 +80,7 @@
 
 
 #define LIBAVUTIL_VERSION_MAJOR  55
-#define LIBAVUTIL_VERSION_MINOR  75
+#define LIBAVUTIL_VERSION_MINOR  76
 #define LIBAVUTIL_VERSION_MICRO 100
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
-- 
2.14.1.821.g8fa685d3b7