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@ -24,11 +24,12 @@ |
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#include "h263dsp.h" |
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const uint8_t ff_h263_loop_filter_strength[32] = { |
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// 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
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0, 1, 1, 2, 2, 3, 3, 4, 4, 4, 5, 5, 6, 6, 7, 7, 7, 8, 8, 8, 9, 9, 9,10,10,10,11,11,11,12,12,12 |
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0, 1, 1, 2, 2, 3, 3, 4, 4, 4, 5, 5, 6, 6, 7, 7, |
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7, 8, 8, 8, 9, 9, 9, 10, 10, 10, 11, 11, 11, 12, 12, 12 |
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}; |
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static void h263_h_loop_filter_c(uint8_t *src, int stride, int qscale){ |
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static void h263_h_loop_filter_c(uint8_t *src, int stride, int qscale) |
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{ |
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int y; |
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const int strength = ff_h263_loop_filter_strength[qscale]; |
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@ -40,16 +41,23 @@ static void h263_h_loop_filter_c(uint8_t *src, int stride, int qscale){ |
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int p3 = src[y * stride + 1]; |
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int d = (p0 - p3 + 4 * (p2 - p1)) / 8; |
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if (d<-2*strength) d1= 0; |
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else if(d<- strength) d1=-2*strength - d; |
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else if(d< strength) d1= d; |
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else if(d< 2*strength) d1= 2*strength - d; |
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else d1= 0; |
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if (d < -2 * strength) |
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d1 = 0; |
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else if (d < -strength) |
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d1 = -2 * strength - d; |
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else if (d < strength) |
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d1 = d; |
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else if (d < 2 * strength) |
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d1 = 2 * strength - d; |
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else |
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d1 = 0; |
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p1 += d1; |
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p2 -= d1; |
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if(p1&256) p1= ~(p1>>31); |
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if(p2&256) p2= ~(p2>>31); |
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if (p1 & 256) |
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p1 = ~(p1 >> 31); |
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if (p2 & 256) |
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p2 = ~(p2 >> 31); |
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src[y * stride - 1] = p1; |
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src[y * stride + 0] = p2; |
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@ -63,7 +71,8 @@ static void h263_h_loop_filter_c(uint8_t *src, int stride, int qscale){ |
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} |
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} |
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static void h263_v_loop_filter_c(uint8_t *src, int stride, int qscale){ |
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static void h263_v_loop_filter_c(uint8_t *src, int stride, int qscale) |
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{ |
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int x; |
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const int strength = ff_h263_loop_filter_strength[qscale]; |
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@ -75,16 +84,23 @@ static void h263_v_loop_filter_c(uint8_t *src, int stride, int qscale){ |
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int p3 = src[x + 1 * stride]; |
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int d = (p0 - p3 + 4 * (p2 - p1)) / 8; |
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if (d<-2*strength) d1= 0; |
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else if(d<- strength) d1=-2*strength - d; |
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else if(d< strength) d1= d; |
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else if(d< 2*strength) d1= 2*strength - d; |
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else d1= 0; |
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if (d < -2 * strength) |
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d1 = 0; |
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else if (d < -strength) |
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d1 = -2 * strength - d; |
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else if (d < strength) |
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d1 = d; |
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else if (d < 2 * strength) |
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d1 = 2 * strength - d; |
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else |
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d1 = 0; |
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p1 += d1; |
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p2 -= d1; |
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if(p1&256) p1= ~(p1>>31); |
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if(p2&256) p2= ~(p2>>31); |
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if (p1 & 256) |
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p1 = ~(p1 >> 31); |
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if (p2 & 256) |
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p2 = ~(p2 >> 31); |
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src[x - 1 * stride] = p1; |
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src[x + 0 * stride] = p2; |
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