avcodec: use VLC_CODEC_

modules/codec/avcodec/chroma.c

@@ -79,8 +79,8 @@ static const struct
     {VLC_CODEC_I410, PIX_FMT_YUV410P, 0, 0, 0 },
     {VLC_FOURCC('Y','V','U','9'), PIX_FMT_YUV410P, 0, 0, 0 },
 
-    {VLC_FOURCC('N','V','1','2'), PIX_FMT_NV12, 0, 0, 0 },
-    {VLC_FOURCC('N','V','2','1'), PIX_FMT_NV21, 0, 0, 0 },
+    {VLC_CODEC_NV12, PIX_FMT_NV12, 0, 0, 0 },
+    {VLC_CODEC_NV21, PIX_FMT_NV21, 0, 0, 0 },
 
     {VLC_CODEC_I420_9L, PIX_FMT_YUV420P9LE, 0, 0, 0 },
     {VLC_CODEC_I420_9B, PIX_FMT_YUV420P9BE, 0, 0, 0 },
@@ -109,7 +109,7 @@ static const struct
 
     /* Packed RGB formats */
     VLC_RGB( VLC_FOURCC('R','G','B','4'), PIX_FMT_RGB4, PIX_FMT_BGR4, 0x10, 0x06, 0x01 )
-    VLC_RGB( VLC_FOURCC('R','G','B','8'), PIX_FMT_RGB8, PIX_FMT_BGR8, 0xC0, 0x38, 0x07 )
+    VLC_RGB( VLC_CODEC_RGB8, PIX_FMT_RGB8, PIX_FMT_BGR8, 0xC0, 0x38, 0x07 )
 
     VLC_RGB( VLC_CODEC_RGB15, PIX_FMT_RGB555, PIX_FMT_BGR555, 0x7c00, 0x03e0, 0x001f )
     VLC_RGB( VLC_CODEC_RGB16, PIX_FMT_RGB565, PIX_FMT_BGR565, 0xf800, 0x07e0, 0x001f )

modules/codec/avcodec/subtitle.c

@@ -192,7 +192,7 @@ static subpicture_region_t *ConvertRegionRGBA(AVSubtitleRect *ffregion)
 
     video_format_t fmt;
     memset(&fmt, 0, sizeof(fmt));
-    fmt.i_chroma         = VLC_FOURCC('R','G','B','A');
+    fmt.i_chroma         = VLC_CODEC_RGBA;
     fmt.i_width          =
     fmt.i_visible_width  = ffregion->w;
     fmt.i_height         =