[FFmpeg-devel] [PATCH] avutil/frame.h: improve documentation for AV_FRAME_FLAG_LOSSLESS

[Leo Izen]

It should be more clear what this flag is indicating with a more
verbose comment documenting it.

Signed-off-by: Leo Izen <leo.izen at gmail.com>
---
 libavutil/frame.h | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/libavutil/frame.h b/libavutil/frame.h
index 993fa6b65a..e3657f193f 100644
--- a/libavutil/frame.h
+++ b/libavutil/frame.h
@@ -666,7 +666,13 @@ typedef struct AVFrame {
  */
 #define AV_FRAME_FLAG_TOP_FIELD_FIRST (1 << 4)
 /**
- * A flag to mark frames which were encoded losslessly from the input.
+ * A flag to mark frames that a decoder has determined were originally encoded
+ * losslessly.
+ *
+ * For coding bitstream formats which support both lossless and lossy
+ * encoding, it is sometimes possible for a decoder to determine which method
+ * was used when the bitsream was encoded. Frames marked with this flag
+ * have been identified by a decoder as having been losslessly encoded, originally.
  */
 #define AV_FRAME_FLAG_LOSSLESS        (1 << 5)
 /**
-- 
2.47.1