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36 #define IDCT_TRANSFORM(dest,s0,s1,s2,s3,s4,s5,s6,s7,d0,d1,d2,d3,d4,d5,d6,d7,munge,src) {\
37 const int a1 = (src)[s1] + (src)[s7]; \
38 const int a7 = (src)[s1] - (src)[s7]; \
39 const int a5 = (src)[s5] + (src)[s3]; \
40 const int a3 = (src)[s5] - (src)[s3]; \
41 const int a2 = (src)[s2] + (src)[s6]; \
42 const int a6 = (ASQRT*((src)[s2] - (src)[s6]))>>8; \
43 const int a0 = (src)[s0] + (src)[s4]; \
44 const int a4 = (src)[s0] - (src)[s4]; \
45 const int b0 = (((A4-A5)*a7 - A5*a3)>>9) + a1+a5; \
46 const int b1 = (((A4-A5)*a7 - A5*a3)>>9) + ((ASQRT*(a1-a5))>>8); \
47 const int b2 = (((A2+A5)*a3 + A5*a7)>>9) + ((ASQRT*(a1-a5))>>8); \
48 const int b3 = ((A2+A5)*a3 + A5*a7)>>9; \
49 (dest)[d0] = munge(a0+a2+a6+b0); \
50 (dest)[d1] = munge(a4+a6 +b1); \
51 (dest)[d2] = munge(a4-a6 +b2); \
52 (dest)[d3] = munge(a0-a2-a6+b3); \
53 (dest)[d4] = munge(a0-a2-a6-b3); \
54 (dest)[d5] = munge(a4-a6 -b2); \
55 (dest)[d6] = munge(a4+a6 -b1); \
56 (dest)[d7] = munge(a0+a2+a6-b0); \
60 #define MUNGE_NONE(x) (x)
61 #define IDCT_COL(dest,src) IDCT_TRANSFORM(dest,0,8,16,24,32,40,48,56,0,8,16,24,32,40,48,56,MUNGE_NONE,src)
63 #define MUNGE_8BIT(x) av_clip_uint8((x)>>4)
64 #define IDCT_ROW(dest,src) IDCT_TRANSFORM(dest,0,1,2,3,4,5,6,7,0,1,2,3,4,5,6,7,MUNGE_8BIT,src)
#define IDCT_COL(dest, src)
void ff_ea_idct_put_c(uint8_t *dest, ptrdiff_t linesize, int16_t *block)
#define IDCT_ROW(dest, src)
static void ea_idct_col(int16_t *dest, const int16_t *src)
The exact code depends on how similar the blocks are and how related they are to the block