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ffmpeg.wasm-core
Commit a402f109 authored by Mans Rullgard's avatar Mans Rullgard
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simple_idct: make repeated code a macro 

Signed-off-by: 's avatarMans Rullgard <mans@mansr.com>
parent 7df701a1
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Showing with 53 additions and 144 deletions
libavcodec/simple_idct_template.c
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......@@ -161,60 +161,63 @@ static inline void FUNC(idctRowCondDC)(DCTELEM *row)
row[4] = (a3 - b3) >> ROW_SHIFT;
}
#define IDCT_COLS do { \
a0 = W4 * (col[8*0] + ((1<<(COL_SHIFT-1))/W4)); \
a1 = a0; \
a2 = a0; \
a3 = a0; \
\
a0 += W2*col[8*2]; \
a1 += W6*col[8*2]; \
a2 += -W6*col[8*2]; \
a3 += -W2*col[8*2]; \
\
b0 = MUL(W1, col[8*1]); \
b1 = MUL(W3, col[8*1]); \
b2 = MUL(W5, col[8*1]); \
b3 = MUL(W7, col[8*1]); \
\
MAC(b0, W3, col[8*3]); \
MAC(b1, -W7, col[8*3]); \
MAC(b2, -W1, col[8*3]); \
MAC(b3, -W5, col[8*3]); \
\
if (col[8*4]) { \
a0 += W4*col[8*4]; \
a1 += -W4*col[8*4]; \
a2 += -W4*col[8*4]; \
a3 += W4*col[8*4]; \
} \
\
if (col[8*5]) { \
MAC(b0, W5, col[8*5]); \
MAC(b1, -W1, col[8*5]); \
MAC(b2, W7, col[8*5]); \
MAC(b3, W3, col[8*5]); \
} \
\
if (col[8*6]) { \
a0 += W6*col[8*6]; \
a1 += -W2*col[8*6]; \
a2 += W2*col[8*6]; \
a3 += -W6*col[8*6]; \
} \
\
if (col[8*7]) { \
MAC(b0, W7, col[8*7]); \
MAC(b1, -W5, col[8*7]); \
MAC(b2, W3, col[8*7]); \
MAC(b3, -W1, col[8*7]); \
} \
} while (0)
static inline void FUNC(idctSparseColPut)(pixel *dest, int line_size,
DCTELEM *col)
{
int a0, a1, a2, a3, b0, b1, b2, b3;
INIT_CLIP;
/* XXX: I did that only to give same values as previous code */
a0 = W4 * (col[8*0] + ((1<<(COL_SHIFT-1))/W4));
a1 = a0;
a2 = a0;
a3 = a0;
a0 += + W2*col[8*2];
a1 += + W6*col[8*2];
a2 += - W6*col[8*2];
a3 += - W2*col[8*2];
b0 = MUL(W1, col[8*1]);
b1 = MUL(W3, col[8*1]);
b2 = MUL(W5, col[8*1]);
b3 = MUL(W7, col[8*1]);
MAC(b0, + W3, col[8*3]);
MAC(b1, - W7, col[8*3]);
MAC(b2, - W1, col[8*3]);
MAC(b3, - W5, col[8*3]);
if(col[8*4]){
a0 += + W4*col[8*4];
a1 += - W4*col[8*4];
a2 += - W4*col[8*4];
a3 += + W4*col[8*4];
}
if (col[8*5]) {
MAC(b0, + W5, col[8*5]);
MAC(b1, - W1, col[8*5]);
MAC(b2, + W7, col[8*5]);
MAC(b3, + W3, col[8*5]);
}
if(col[8*6]){
a0 += + W6*col[8*6];
a1 += - W2*col[8*6];
a2 += + W2*col[8*6];
a3 += - W6*col[8*6];
}
if (col[8*7]) {
MAC(b0, + W7, col[8*7]);
MAC(b1, - W5, col[8*7]);
MAC(b2, + W3, col[8*7]);
MAC(b3, - W1, col[8*7]);
}
IDCT_COLS;
dest[0] = CLIP((a0 + b0) >> COL_SHIFT);
dest += line_size;
......@@ -239,54 +242,7 @@ static inline void FUNC(idctSparseColAdd)(pixel *dest, int line_size,
int a0, a1, a2, a3, b0, b1, b2, b3;
INIT_CLIP;
/* XXX: I did that only to give same values as previous code */
a0 = W4 * (col[8*0] + ((1<<(COL_SHIFT-1))/W4));
a1 = a0;
a2 = a0;
a3 = a0;
a0 += + W2*col[8*2];
a1 += + W6*col[8*2];
a2 += - W6*col[8*2];
a3 += - W2*col[8*2];
b0 = MUL(W1, col[8*1]);
b1 = MUL(W3, col[8*1]);
b2 = MUL(W5, col[8*1]);
b3 = MUL(W7, col[8*1]);
MAC(b0, + W3, col[8*3]);
MAC(b1, - W7, col[8*3]);
MAC(b2, - W1, col[8*3]);
MAC(b3, - W5, col[8*3]);
if(col[8*4]){
a0 += + W4*col[8*4];
a1 += - W4*col[8*4];
a2 += - W4*col[8*4];
a3 += + W4*col[8*4];
}
if (col[8*5]) {
MAC(b0, + W5, col[8*5]);
MAC(b1, - W1, col[8*5]);
MAC(b2, + W7, col[8*5]);
MAC(b3, + W3, col[8*5]);
}
if(col[8*6]){
a0 += + W6*col[8*6];
a1 += - W2*col[8*6];
a2 += + W2*col[8*6];
a3 += - W6*col[8*6];
}
if (col[8*7]) {
MAC(b0, + W7, col[8*7]);
MAC(b1, - W5, col[8*7]);
MAC(b2, + W3, col[8*7]);
MAC(b3, - W1, col[8*7]);
}
IDCT_COLS;
dest[0] = CLIP(dest[0] + ((a0 + b0) >> COL_SHIFT));
dest += line_size;
......@@ -309,54 +265,7 @@ static inline void FUNC(idctSparseCol)(DCTELEM *col)
{
int a0, a1, a2, a3, b0, b1, b2, b3;
/* XXX: I did that only to give same values as previous code */
a0 = W4 * (col[8*0] + ((1<<(COL_SHIFT-1))/W4));
a1 = a0;
a2 = a0;
a3 = a0;
a0 += + W2*col[8*2];
a1 += + W6*col[8*2];
a2 += - W6*col[8*2];
a3 += - W2*col[8*2];
b0 = MUL(W1, col[8*1]);
b1 = MUL(W3, col[8*1]);
b2 = MUL(W5, col[8*1]);
b3 = MUL(W7, col[8*1]);
MAC(b0, + W3, col[8*3]);
MAC(b1, - W7, col[8*3]);
MAC(b2, - W1, col[8*3]);
MAC(b3, - W5, col[8*3]);
if(col[8*4]){
a0 += + W4*col[8*4];
a1 += - W4*col[8*4];
a2 += - W4*col[8*4];
a3 += + W4*col[8*4];
}
if (col[8*5]) {
MAC(b0, + W5, col[8*5]);
MAC(b1, - W1, col[8*5]);
MAC(b2, + W7, col[8*5]);
MAC(b3, + W3, col[8*5]);
}
if(col[8*6]){
a0 += + W6*col[8*6];
a1 += - W2*col[8*6];
a2 += + W2*col[8*6];
a3 += - W6*col[8*6];
}
if (col[8*7]) {
MAC(b0, + W7, col[8*7]);
MAC(b1, - W5, col[8*7]);
MAC(b2, + W3, col[8*7]);
MAC(b3, - W1, col[8*7]);
}
IDCT_COLS;
col[0 ] = ((a0 + b0) >> COL_SHIFT);
col[8 ] = ((a1 + b1) >> COL_SHIFT);
......
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