pixdesc: mark pseudopaletted formats with a special flag.

This makes it possible to dintinguish them from PAL8.

Fixes an invalid write in avpicture_layout().

1 files changed, 6 insertions, 0 deletions

diff --git a/libavutil/pixdesc.h b/libavutil/pixdesc.h
index b5972c78ff..23a97ee231 100644
--- a/libavutil/pixdesc.h
+++ b/libavutil/pixdesc.h
@@ -89,6 +89,12 @@ typedef struct AVPixFmtDescriptor{
 #define PIX_FMT_HWACCEL   8 ///< Pixel format is an HW accelerated format.
 #define PIX_FMT_PLANAR   16 ///< At least one pixel component is not in the first data plane
 #define PIX_FMT_RGB      32 ///< The pixel format contains RGB-like data (as opposed to YUV/grayscale)
+/**
+ * The pixel format is "pseudo-paletted". This means that Libav treats it as
+ * paletted internally, but the palette is generated by the decoder and is not
+ * stored in the file.
+ */
+#define PIX_FMT_PSEUDOPAL 64
 
 /**
  * The array of all the pixel format descriptors.