diff options
| author | Mike Melanson <mike@multimedia.cx> | 2003-09-13 02:31:03 +0000 |
|---|---|---|
| committer | Mike Melanson <mike@multimedia.cx> | 2003-09-13 02:31:03 +0000 |
| commit | 0f371e3e2a406a327a4269a3bfe2b2a1d8a49681 (patch) | |
| tree | 6639cb8740b735874159590b8883f9ff5100b0af /libavcodec/avcodec.h | |
| parent | e7015b41e7b6d1fe00423229428ed25127f2bc73 (diff) | |
final word on RGBA byte order
Originally committed as revision 2268 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/avcodec.h')
| -rw-r--r-- | libavcodec/avcodec.h | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h index 16fe4ed8f6..75ad80e9a6 100644 --- a/libavcodec/avcodec.h +++ b/libavcodec/avcodec.h @@ -115,7 +115,19 @@ enum CodecType { }; /** - * Pixel format. + * Pixel format. Notes: + * + * PIX_FMT_RGBA32 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 + * big endian CPUs. + * + * 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 + * also endian-specific). */ enum PixelFormat { PIX_FMT_YUV420P, ///< Planar YUV 4:2:0 (1 Cr & Cb sample per 2x2 Y samples) @@ -124,7 +136,7 @@ enum PixelFormat { 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... + 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 |