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ffmpeg.wasm-core
Commit f3647f59 authored by Kostya Shishkov's avatar Kostya Shishkov
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Factor out constant addition 

Originally committed as revision 11558 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent f841a0fc
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Showing with 64 additions and 64 deletions
libavcodec/vc1dsp.c
View file @ f3647f59
......@@ -90,8 +90,8 @@ static void vc1_inv_trans_8x8_c(DCTELEM block[64])
src = block;
dst = block;
for(i = 0; i < 8; i++){
t1 = 12 * (src[0] + src[4]);
t2 = 12 * (src[0] - src[4]);
t1 = 12 * (src[0] + src[4]) + 4;
t2 = 12 * (src[0] - src[4]) + 4;
t3 = 16 * src[2] + 6 * src[6];
t4 = 6 * src[2] - 16 * src[6];
......@@ -105,14 +105,14 @@ static void vc1_inv_trans_8x8_c(DCTELEM block[64])
t3 = 9 * src[1] - 16 * src[3] + 4 * src[5] + 15 * src[7];
t4 = 4 * src[1] - 9 * src[3] + 15 * src[5] - 16 * src[7];
dst[0] = (t5 + t1 + 4) >> 3;
dst[1] = (t6 + t2 + 4) >> 3;
dst[2] = (t7 + t3 + 4) >> 3;
dst[3] = (t8 + t4 + 4) >> 3;
dst[4] = (t8 - t4 + 4) >> 3;
dst[5] = (t7 - t3 + 4) >> 3;
dst[6] = (t6 - t2 + 4) >> 3;
dst[7] = (t5 - t1 + 4) >> 3;
dst[0] = (t5 + t1) >> 3;
dst[1] = (t6 + t2) >> 3;
dst[2] = (t7 + t3) >> 3;
dst[3] = (t8 + t4) >> 3;
dst[4] = (t8 - t4) >> 3;
dst[5] = (t7 - t3) >> 3;
dst[6] = (t6 - t2) >> 3;
dst[7] = (t5 - t1) >> 3;
src += 8;
dst += 8;
......@@ -121,8 +121,8 @@ static void vc1_inv_trans_8x8_c(DCTELEM block[64])
src = block;
dst = block;
for(i = 0; i < 8; i++){
t1 = 12 * (src[ 0] + src[32]);
t2 = 12 * (src[ 0] - src[32]);
t1 = 12 * (src[ 0] + src[32]) + 64;
t2 = 12 * (src[ 0] - src[32]) + 64;
t3 = 16 * src[16] + 6 * src[48];
t4 = 6 * src[16] - 16 * src[48];
......@@ -136,14 +136,14 @@ static void vc1_inv_trans_8x8_c(DCTELEM block[64])
t3 = 9 * src[ 8] - 16 * src[24] + 4 * src[40] + 15 * src[56];
t4 = 4 * src[ 8] - 9 * src[24] + 15 * src[40] - 16 * src[56];
dst[ 0] = (t5 + t1 + 64) >> 7;
dst[ 8] = (t6 + t2 + 64) >> 7;
dst[16] = (t7 + t3 + 64) >> 7;
dst[24] = (t8 + t4 + 64) >> 7;
dst[32] = (t8 - t4 + 64 + 1) >> 7;
dst[40] = (t7 - t3 + 64 + 1) >> 7;
dst[48] = (t6 - t2 + 64 + 1) >> 7;
dst[56] = (t5 - t1 + 64 + 1) >> 7;
dst[ 0] = (t5 + t1) >> 7;
dst[ 8] = (t6 + t2) >> 7;
dst[16] = (t7 + t3) >> 7;
dst[24] = (t8 + t4) >> 7;
dst[32] = (t8 - t4 + 1) >> 7;
dst[40] = (t7 - t3 + 1) >> 7;
dst[48] = (t6 - t2 + 1) >> 7;
dst[56] = (t5 - t1 + 1) >> 7;
src++;
dst++;
......@@ -162,8 +162,8 @@ static void vc1_inv_trans_8x4_c(uint8_t *dest, int linesize, DCTELEM *block)
src = block;
dst = block;
for(i = 0; i < 4; i++){
t1 = 12 * (src[0] + src[4]);
t2 = 12 * (src[0] - src[4]);
t1 = 12 * (src[0] + src[4]) + 4;
t2 = 12 * (src[0] - src[4]) + 4;
t3 = 16 * src[2] + 6 * src[6];
t4 = 6 * src[2] - 16 * src[6];
......@@ -177,14 +177,14 @@ static void vc1_inv_trans_8x4_c(uint8_t *dest, int linesize, DCTELEM *block)
t3 = 9 * src[1] - 16 * src[3] + 4 * src[5] + 15 * src[7];
t4 = 4 * src[1] - 9 * src[3] + 15 * src[5] - 16 * src[7];
dst[0] = (t5 + t1 + 4) >> 3;
dst[1] = (t6 + t2 + 4) >> 3;
dst[2] = (t7 + t3 + 4) >> 3;
dst[3] = (t8 + t4 + 4) >> 3;
dst[4] = (t8 - t4 + 4) >> 3;
dst[5] = (t7 - t3 + 4) >> 3;
dst[6] = (t6 - t2 + 4) >> 3;
dst[7] = (t5 - t1 + 4) >> 3;
dst[0] = (t5 + t1) >> 3;
dst[1] = (t6 + t2) >> 3;
dst[2] = (t7 + t3) >> 3;
dst[3] = (t8 + t4) >> 3;
dst[4] = (t8 - t4) >> 3;
dst[5] = (t7 - t3) >> 3;
dst[6] = (t6 - t2) >> 3;
dst[7] = (t5 - t1) >> 3;
src += 8;
dst += 8;
......@@ -192,17 +192,17 @@ static void vc1_inv_trans_8x4_c(uint8_t *dest, int linesize, DCTELEM *block)
src = block;
for(i = 0; i < 8; i++){
t1 = 17 * (src[ 0] + src[16]);
t2 = 17 * (src[ 0] - src[16]);
t1 = 17 * (src[ 0] + src[16]) + 64;
t2 = 17 * (src[ 0] - src[16]) + 64;
t3 = 22 * src[ 8];
t4 = 22 * src[24];
t5 = 10 * src[ 8];
t6 = 10 * src[24];
dest[0*linesize] = cm[dest[0*linesize] + ((t1 + t3 + t6 + 64) >> 7)];
dest[1*linesize] = cm[dest[1*linesize] + ((t2 - t4 + t5 + 64) >> 7)];
dest[2*linesize] = cm[dest[2*linesize] + ((t2 + t4 - t5 + 64) >> 7)];
dest[3*linesize] = cm[dest[3*linesize] + ((t1 - t3 - t6 + 64) >> 7)];
dest[0*linesize] = cm[dest[0*linesize] + ((t1 + t3 + t6) >> 7)];
dest[1*linesize] = cm[dest[1*linesize] + ((t2 - t4 + t5) >> 7)];
dest[2*linesize] = cm[dest[2*linesize] + ((t2 + t4 - t5) >> 7)];
dest[3*linesize] = cm[dest[3*linesize] + ((t1 - t3 - t6) >> 7)];
src ++;
dest++;
......@@ -221,17 +221,17 @@ static void vc1_inv_trans_4x8_c(uint8_t *dest, int linesize, DCTELEM *block)
src = block;
dst = block;
for(i = 0; i < 8; i++){
t1 = 17 * (src[0] + src[2]);
t2 = 17 * (src[0] - src[2]);
t1 = 17 * (src[0] + src[2]) + 4;
t2 = 17 * (src[0] - src[2]) + 4;
t3 = 22 * src[1];
t4 = 22 * src[3];
t5 = 10 * src[1];
t6 = 10 * src[3];
dst[0] = (t1 + t3 + t6 + 4) >> 3;
dst[1] = (t2 - t4 + t5 + 4) >> 3;
dst[2] = (t2 + t4 - t5 + 4) >> 3;
dst[3] = (t1 - t3 - t6 + 4) >> 3;
dst[0] = (t1 + t3 + t6) >> 3;
dst[1] = (t2 - t4 + t5) >> 3;
dst[2] = (t2 + t4 - t5) >> 3;
dst[3] = (t1 - t3 - t6) >> 3;
src += 8;
dst += 8;
......@@ -239,8 +239,8 @@ static void vc1_inv_trans_4x8_c(uint8_t *dest, int linesize, DCTELEM *block)
src = block;
for(i = 0; i < 4; i++){
t1 = 12 * (src[ 0] + src[32]);
t2 = 12 * (src[ 0] - src[32]);
t1 = 12 * (src[ 0] + src[32]) + 64;
t2 = 12 * (src[ 0] - src[32]) + 64;
t3 = 16 * src[16] + 6 * src[48];
t4 = 6 * src[16] - 16 * src[48];
......@@ -254,14 +254,14 @@ static void vc1_inv_trans_4x8_c(uint8_t *dest, int linesize, DCTELEM *block)
t3 = 9 * src[ 8] - 16 * src[24] + 4 * src[40] + 15 * src[56];
t4 = 4 * src[ 8] - 9 * src[24] + 15 * src[40] - 16 * src[56];
dest[0*linesize] = cm[dest[0*linesize] + ((t5 + t1 + 64) >> 7)];
dest[1*linesize] = cm[dest[1*linesize] + ((t6 + t2 + 64) >> 7)];
dest[2*linesize] = cm[dest[2*linesize] + ((t7 + t3 + 64) >> 7)];
dest[3*linesize] = cm[dest[3*linesize] + ((t8 + t4 + 64) >> 7)];
dest[4*linesize] = cm[dest[4*linesize] + ((t8 - t4 + 64 + 1) >> 7)];
dest[5*linesize] = cm[dest[5*linesize] + ((t7 - t3 + 64 + 1) >> 7)];
dest[6*linesize] = cm[dest[6*linesize] + ((t6 - t2 + 64 + 1) >> 7)];
dest[7*linesize] = cm[dest[7*linesize] + ((t5 - t1 + 64 + 1) >> 7)];
dest[0*linesize] = cm[dest[0*linesize] + ((t5 + t1) >> 7)];
dest[1*linesize] = cm[dest[1*linesize] + ((t6 + t2) >> 7)];
dest[2*linesize] = cm[dest[2*linesize] + ((t7 + t3) >> 7)];
dest[3*linesize] = cm[dest[3*linesize] + ((t8 + t4) >> 7)];
dest[4*linesize] = cm[dest[4*linesize] + ((t8 - t4 + 1) >> 7)];
dest[5*linesize] = cm[dest[5*linesize] + ((t7 - t3 + 1) >> 7)];
dest[6*linesize] = cm[dest[6*linesize] + ((t6 - t2 + 1) >> 7)];
dest[7*linesize] = cm[dest[7*linesize] + ((t5 - t1 + 1) >> 7)];
src ++;
dest++;
......@@ -280,17 +280,17 @@ static void vc1_inv_trans_4x4_c(uint8_t *dest, int linesize, DCTELEM *block)
src = block;
dst = block;
for(i = 0; i < 4; i++){
t1 = 17 * (src[0] + src[2]);
t2 = 17 * (src[0] - src[2]);
t1 = 17 * (src[0] + src[2]) + 4;
t2 = 17 * (src[0] - src[2]) + 4;
t3 = 22 * src[1];
t4 = 22 * src[3];
t5 = 10 * src[1];
t6 = 10 * src[3];
dst[0] = (t1 + t3 + t6 + 4) >> 3;
dst[1] = (t2 - t4 + t5 + 4) >> 3;
dst[2] = (t2 + t4 - t5 + 4) >> 3;
dst[3] = (t1 - t3 - t6 + 4) >> 3;
dst[0] = (t1 + t3 + t6) >> 3;
dst[1] = (t2 - t4 + t5) >> 3;
dst[2] = (t2 + t4 - t5) >> 3;
dst[3] = (t1 - t3 - t6) >> 3;
src += 8;
dst += 8;
......@@ -298,17 +298,17 @@ static void vc1_inv_trans_4x4_c(uint8_t *dest, int linesize, DCTELEM *block)
src = block;
for(i = 0; i < 4; i++){
t1 = 17 * (src[ 0] + src[16]);
t2 = 17 * (src[ 0] - src[16]);
t1 = 17 * (src[ 0] + src[16]) + 64;
t2 = 17 * (src[ 0] - src[16]) + 64;
t3 = 22 * src[ 8];
t4 = 22 * src[24];
t5 = 10 * src[ 8];
t6 = 10 * src[24];
dest[0*linesize] = cm[dest[0*linesize] + ((t1 + t3 + t6 + 64) >> 7)];
dest[1*linesize] = cm[dest[1*linesize] + ((t2 - t4 + t5 + 64) >> 7)];
dest[2*linesize] = cm[dest[2*linesize] + ((t2 + t4 - t5 + 64) >> 7)];
dest[3*linesize] = cm[dest[3*linesize] + ((t1 - t3 - t6 + 64) >> 7)];
dest[0*linesize] = cm[dest[0*linesize] + ((t1 + t3 + t6) >> 7)];
dest[1*linesize] = cm[dest[1*linesize] + ((t2 - t4 + t5) >> 7)];
dest[2*linesize] = cm[dest[2*linesize] + ((t2 + t4 - t5) >> 7)];
dest[3*linesize] = cm[dest[3*linesize] + ((t1 - t3 - t6) >> 7)];
src ++;
dest++;
......
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