From 6a1846eb4abcb7839e3ef2a52f8f73ff78b0aac0 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Fri, 19 Dec 2008 09:34:18 +0000 Subject: [PATCH] Document new idct requirements. Originally committed as revision 16237 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/dsputil.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/libavcodec/dsputil.h b/libavcodec/dsputil.h index d4df99b..5beda8b 100644 --- a/libavcodec/dsputil.h +++ b/libavcodec/dsputil.h @@ -442,6 +442,10 @@ typedef struct DSPContext { #define EDGE_WIDTH 16 /* h264 functions */ + /* NOTE!!! if you implement any of h264_idct8_add, h264_idct8_add4 then you must implement all of them + NOTE!!! if you implement any of h264_idct_add, h264_idct_add16, h264_idct_add16intra, h264_idct_add8 then you must implement all of them + The reason for above, is that no 2 out of one list may use a different permutation. + */ void (*h264_idct_add)(uint8_t *dst/*align 4*/, DCTELEM *block/*align 16*/, int stride); void (*h264_idct8_add)(uint8_t *dst/*align 8*/, DCTELEM *block/*align 16*/, int stride); void (*h264_idct_dc_add)(uint8_t *dst/*align 4*/, DCTELEM *block/*align 16*/, int stride); -- 2.7.4