avcodec: add avcodec_chroma_pos_to_enum()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 11 insertions, 0 deletions

diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index bcef2a454d..98217b8be5 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -3617,6 +3617,17 @@ void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
  */
 int avcodec_enum_to_chroma_pos(int *xpos, int *ypos, enum AVChromaLocation pos);
 
+/**
+ * Converts swscale x/y chroma position to AVChromaLocation.
+ *
+ * The positions represent the chroma (0,0) position in a coordinates system
+ * with luma (0,0) representing the origin and luma(1,1) representing 256,256
+ *
+ * @param xpos  horizontal chroma sample position
+ * @param ypos  vertical   chroma sample position
+ */
+enum AVChromaLocation avcodec_chroma_pos_to_enum(int xpos, int ypos);
+
 #if FF_API_OLD_DECODE_AUDIO
 /**
  * Wrapper function which calls avcodec_decode_audio4.