cleanup PixelFormat a little

Originally committed as revision 6034 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavutil/avutil.h

@@ -31,7 +31,7 @@ extern "C" {
 /**
  * Pixel format. Notes:
  *
- * PIX_FMT_RGBA32 is handled in an endian-specific manner. A RGBA
+ * PIX_FMT_RGB32 is handled in an endian-specific manner. A RGBA
  * color is put together as:
  *  (A << 24) | (R << 16) | (G << 8) | B
  * This is stored as BGRA on little endian CPU architectures and ARGB on
@@ -40,7 +40,7 @@ extern "C" {
  * When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
  * image data is stored in AVFrame.data[0]. The palette is transported in
  * AVFrame.data[1] and, is 1024 bytes long (256 4-byte entries) and is
- * formatted the same as in PIX_FMT_RGBA32 described above (i.e., it is
+ * formatted the same as in PIX_FMT_RGB32 described above (i.e., it is
  * also endian-specific). Note also that the individual RGB palette
  * components stored in AVFrame.data[1] should be in the range 0..255.
  * This is important as many custom PAL8 video codecs that were designed
@@ -48,31 +48,45 @@ extern "C" {
  */
 enum PixelFormat {
     PIX_FMT_NONE= -1,
-    PIX_FMT_YUV420P,   ///< Planar YUV 4:2:0 (1 Cr & Cb sample per 2x2 Y samples)
-    PIX_FMT_YUV422,    ///< Packed pixel, Y0 Cb Y1 Cr
-    PIX_FMT_RGB24,     ///< Packed pixel, 3 bytes per pixel, RGBRGB...
-    PIX_FMT_BGR24,     ///< Packed pixel, 3 bytes per pixel, BGRBGR...
-    PIX_FMT_YUV422P,   ///< Planar YUV 4:2:2 (1 Cr & Cb sample per 2x1 Y samples)
-    PIX_FMT_YUV444P,   ///< Planar YUV 4:4:4 (1 Cr & Cb sample per 1x1 Y samples)
-    PIX_FMT_RGBA32,    ///< Packed pixel, 4 bytes per pixel, BGRABGRA..., stored in cpu endianness
-    PIX_FMT_YUV410P,   ///< Planar YUV 4:1:0 (1 Cr & Cb sample per 4x4 Y samples)
-    PIX_FMT_YUV411P,   ///< Planar YUV 4:1:1 (1 Cr & Cb sample per 4x1 Y samples)
-    PIX_FMT_RGB565,    ///< always stored in cpu endianness
-    PIX_FMT_RGB555,    ///< always stored in cpu endianness, most significant bit to 1
-    PIX_FMT_GRAY8,
-    PIX_FMT_MONOWHITE, ///< 0 is white
-    PIX_FMT_MONOBLACK, ///< 0 is black
-    PIX_FMT_PAL8,      ///< 8 bit with RGBA palette
-    PIX_FMT_YUVJ420P,  ///< Planar YUV 4:2:0 full scale (jpeg)
-    PIX_FMT_YUVJ422P,  ///< Planar YUV 4:2:2 full scale (jpeg)
-    PIX_FMT_YUVJ444P,  ///< Planar YUV 4:4:4 full scale (jpeg)
+    PIX_FMT_YUV420P,   ///< Planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
+    PIX_FMT_YUYV422,   ///< Packed YUV 4:2:2, 16bpp, Y0 Cb Y1 Cr
+    PIX_FMT_RGB24,     ///< Packed RGB 8:8:8, 24bpp, RGBRGB...
+    PIX_FMT_BGR24,     ///< Packed RGB 8:8:8, 24bpp, BGRBGR...
+    PIX_FMT_YUV422P,   ///< Planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
+    PIX_FMT_YUV444P,   ///< Planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
+    PIX_FMT_RGB32,     ///< Packed RGB 8:8:8, 32bpp, (msb)8A 8R 8G 8B(lsb), in cpu endianness
+    PIX_FMT_YUV410P,   ///< Planar YUV 4:1:0,  9bpp, (1 Cr & Cb sample per 4x4 Y samples)
+    PIX_FMT_YUV411P,   ///< Planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
+    PIX_FMT_RGB565,    ///< Packed RGB 5:6:5, 16bpp, (msb)   5R 6G 5B(lsb), in cpu endianness
+    PIX_FMT_RGB555,    ///< Packed RGB 5:5:5, 16bpp, (msb)1A 5R 5G 5B(lsb), in cpu endianness most significant bit to 1
+    PIX_FMT_GRAY8,     ///<        Y        ,  8bpp
+    PIX_FMT_MONOWHITE, ///<        Y        ,  1bpp, 1 is white
+    PIX_FMT_MONOBLACK, ///<        Y        ,  1bpp, 0 is black
+    PIX_FMT_PAL8,      ///< 8 bit with PIX_FMT_RGB32 palette
+    PIX_FMT_YUVJ420P,  ///< Planar YUV 4:2:0, 12bpp, full scale (jpeg)
+    PIX_FMT_YUVJ422P,  ///< Planar YUV 4:2:2, 16bpp, full scale (jpeg)
+    PIX_FMT_YUVJ444P,  ///< Planar YUV 4:4:4, 24bpp, full scale (jpeg)
     PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing(xvmc_render.h)
     PIX_FMT_XVMC_MPEG2_IDCT,
-    PIX_FMT_UYVY422,   ///< Packed pixel, Cb Y0 Cr Y1
-    PIX_FMT_UYVY411,   ///< Packed pixel, Cb Y0 Y1 Cr Y2 Y3
+    PIX_FMT_UYVY422,   ///< Packed YUV 4:2:2, 16bpp, Cb Y0 Cr Y1
+    PIX_FMT_UYYVYY411, ///< Packed YUV 4:1:1, 12bpp, Cb Y0 Y1 Cr Y2 Y3
     PIX_FMT_NB,
 };
 
+#ifdef WORDS_BIGENDIAN
+#define PIX_FMT_BGRA PIX_FMT_NONE
+#define PIX_FMT_ARGB PIX_FMT_RGB32
+#else
+#define PIX_FMT_BGRA PIX_FMT_RGB32
+#define PIX_FMT_ARGB PIX_FMT_NONE
+#endif
+
+#if LIBAVUTIL_VERSION_INT < (50<<16)
+#define PIX_FMT_UYVY411 PIX_FMT_UYYVYY411
+#define PIX_FMT_RGBA32  PIX_FMT_RGB32
+#define PIX_FMT_YUV422  PIX_FMT_YUYV422
+#endif
+
 #ifdef __cplusplus
 }
 #endif