1 // Copyright 2015 Google Inc. All Rights Reserved. 2 // 3 // Use of this source code is governed by a BSD-style license 4 // that can be found in the COPYING file in the root of the source 5 // tree. An additional intellectual property rights grant can be found 6 // in the file PATENTS. All contributing project authors may 7 // be found in the AUTHORS file in the root of the source tree. 8 // ----------------------------------------------------------------------------- 9 // 10 // Image transform methods for lossless encoder. 11 // 12 // Author(s): Djordje Pesut (djordje.pesut (at) imgtec.com) 13 // Jovan Zelincevic (jovan.zelincevic (at) imgtec.com) 14 15 #include "./dsp.h" 16 17 #if defined(WEBP_USE_MIPS_DSP_R2) 18 19 #include "./lossless.h" 20 21 static void SubtractGreenFromBlueAndRed(uint32_t* argb_data, 22 int num_pixels) { 23 uint32_t temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7; 24 uint32_t* const p_loop1_end = argb_data + (num_pixels & ~3); 25 uint32_t* const p_loop2_end = p_loop1_end + (num_pixels & 3); 26 __asm__ volatile ( 27 ".set push \n\t" 28 ".set noreorder \n\t" 29 "beq %[argb_data], %[p_loop1_end], 3f \n\t" 30 " nop \n\t" 31 "0: \n\t" 32 "lw %[temp0], 0(%[argb_data]) \n\t" 33 "lw %[temp1], 4(%[argb_data]) \n\t" 34 "lw %[temp2], 8(%[argb_data]) \n\t" 35 "lw %[temp3], 12(%[argb_data]) \n\t" 36 "ext %[temp4], %[temp0], 8, 8 \n\t" 37 "ext %[temp5], %[temp1], 8, 8 \n\t" 38 "ext %[temp6], %[temp2], 8, 8 \n\t" 39 "ext %[temp7], %[temp3], 8, 8 \n\t" 40 "addiu %[argb_data], %[argb_data], 16 \n\t" 41 "replv.ph %[temp4], %[temp4] \n\t" 42 "replv.ph %[temp5], %[temp5] \n\t" 43 "replv.ph %[temp6], %[temp6] \n\t" 44 "replv.ph %[temp7], %[temp7] \n\t" 45 "subu.qb %[temp0], %[temp0], %[temp4] \n\t" 46 "subu.qb %[temp1], %[temp1], %[temp5] \n\t" 47 "subu.qb %[temp2], %[temp2], %[temp6] \n\t" 48 "subu.qb %[temp3], %[temp3], %[temp7] \n\t" 49 "sw %[temp0], -16(%[argb_data]) \n\t" 50 "sw %[temp1], -12(%[argb_data]) \n\t" 51 "sw %[temp2], -8(%[argb_data]) \n\t" 52 "bne %[argb_data], %[p_loop1_end], 0b \n\t" 53 " sw %[temp3], -4(%[argb_data]) \n\t" 54 "3: \n\t" 55 "beq %[argb_data], %[p_loop2_end], 2f \n\t" 56 " nop \n\t" 57 "1: \n\t" 58 "lw %[temp0], 0(%[argb_data]) \n\t" 59 "addiu %[argb_data], %[argb_data], 4 \n\t" 60 "ext %[temp4], %[temp0], 8, 8 \n\t" 61 "replv.ph %[temp4], %[temp4] \n\t" 62 "subu.qb %[temp0], %[temp0], %[temp4] \n\t" 63 "bne %[argb_data], %[p_loop2_end], 1b \n\t" 64 " sw %[temp0], -4(%[argb_data]) \n\t" 65 "2: \n\t" 66 ".set pop \n\t" 67 : [argb_data]"+&r"(argb_data), [temp0]"=&r"(temp0), 68 [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), [temp3]"=&r"(temp3), 69 [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [temp6]"=&r"(temp6), 70 [temp7]"=&r"(temp7) 71 : [p_loop1_end]"r"(p_loop1_end), [p_loop2_end]"r"(p_loop2_end) 72 : "memory" 73 ); 74 } 75 76 static WEBP_INLINE uint32_t ColorTransformDelta(int8_t color_pred, 77 int8_t color) { 78 return (uint32_t)((int)(color_pred) * color) >> 5; 79 } 80 81 static void TransformColor(const VP8LMultipliers* const m, uint32_t* data, 82 int num_pixels) { 83 int temp0, temp1, temp2, temp3, temp4, temp5; 84 uint32_t argb, argb1, new_red, new_red1; 85 const uint32_t G_to_R = m->green_to_red_; 86 const uint32_t G_to_B = m->green_to_blue_; 87 const uint32_t R_to_B = m->red_to_blue_; 88 uint32_t* const p_loop_end = data + (num_pixels & ~1); 89 __asm__ volatile ( 90 ".set push \n\t" 91 ".set noreorder \n\t" 92 "beq %[data], %[p_loop_end], 1f \n\t" 93 " nop \n\t" 94 "replv.ph %[temp0], %[G_to_R] \n\t" 95 "replv.ph %[temp1], %[G_to_B] \n\t" 96 "replv.ph %[temp2], %[R_to_B] \n\t" 97 "shll.ph %[temp0], %[temp0], 8 \n\t" 98 "shll.ph %[temp1], %[temp1], 8 \n\t" 99 "shll.ph %[temp2], %[temp2], 8 \n\t" 100 "shra.ph %[temp0], %[temp0], 8 \n\t" 101 "shra.ph %[temp1], %[temp1], 8 \n\t" 102 "shra.ph %[temp2], %[temp2], 8 \n\t" 103 "0: \n\t" 104 "lw %[argb], 0(%[data]) \n\t" 105 "lw %[argb1], 4(%[data]) \n\t" 106 "lhu %[new_red], 2(%[data]) \n\t" 107 "lhu %[new_red1], 6(%[data]) \n\t" 108 "precrq.qb.ph %[temp3], %[argb], %[argb1] \n\t" 109 "precr.qb.ph %[temp4], %[argb], %[argb1] \n\t" 110 "preceu.ph.qbra %[temp3], %[temp3] \n\t" 111 "preceu.ph.qbla %[temp4], %[temp4] \n\t" 112 "shll.ph %[temp3], %[temp3], 8 \n\t" 113 "shll.ph %[temp4], %[temp4], 8 \n\t" 114 "shra.ph %[temp3], %[temp3], 8 \n\t" 115 "shra.ph %[temp4], %[temp4], 8 \n\t" 116 "mul.ph %[temp5], %[temp3], %[temp0] \n\t" 117 "mul.ph %[temp3], %[temp3], %[temp1] \n\t" 118 "mul.ph %[temp4], %[temp4], %[temp2] \n\t" 119 "addiu %[data], %[data], 8 \n\t" 120 "ins %[new_red1], %[new_red], 16, 16 \n\t" 121 "ins %[argb1], %[argb], 16, 16 \n\t" 122 "shra.ph %[temp5], %[temp5], 5 \n\t" 123 "shra.ph %[temp3], %[temp3], 5 \n\t" 124 "shra.ph %[temp4], %[temp4], 5 \n\t" 125 "subu.ph %[new_red1], %[new_red1], %[temp5] \n\t" 126 "subu.ph %[argb1], %[argb1], %[temp3] \n\t" 127 "preceu.ph.qbra %[temp5], %[new_red1] \n\t" 128 "subu.ph %[argb1], %[argb1], %[temp4] \n\t" 129 "preceu.ph.qbra %[temp3], %[argb1] \n\t" 130 "sb %[temp5], -2(%[data]) \n\t" 131 "sb %[temp3], -4(%[data]) \n\t" 132 "sra %[temp5], %[temp5], 16 \n\t" 133 "sra %[temp3], %[temp3], 16 \n\t" 134 "sb %[temp5], -6(%[data]) \n\t" 135 "bne %[data], %[p_loop_end], 0b \n\t" 136 " sb %[temp3], -8(%[data]) \n\t" 137 "1: \n\t" 138 ".set pop \n\t" 139 : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), 140 [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), 141 [new_red1]"=&r"(new_red1), [new_red]"=&r"(new_red), 142 [argb]"=&r"(argb), [argb1]"=&r"(argb1), [data]"+&r"(data) 143 : [G_to_R]"r"(G_to_R), [R_to_B]"r"(R_to_B), 144 [G_to_B]"r"(G_to_B), [p_loop_end]"r"(p_loop_end) 145 : "memory", "hi", "lo" 146 ); 147 148 if (num_pixels & 1) { 149 const uint32_t argb_ = data[0]; 150 const uint32_t green = argb_ >> 8; 151 const uint32_t red = argb_ >> 16; 152 uint32_t new_blue = argb_; 153 new_red = red; 154 new_red -= ColorTransformDelta(m->green_to_red_, green); 155 new_red &= 0xff; 156 new_blue -= ColorTransformDelta(m->green_to_blue_, green); 157 new_blue -= ColorTransformDelta(m->red_to_blue_, red); 158 new_blue &= 0xff; 159 data[0] = (argb_ & 0xff00ff00u) | (new_red << 16) | (new_blue); 160 } 161 } 162 163 static WEBP_INLINE uint8_t TransformColorBlue(uint8_t green_to_blue, 164 uint8_t red_to_blue, 165 uint32_t argb) { 166 const uint32_t green = argb >> 8; 167 const uint32_t red = argb >> 16; 168 uint8_t new_blue = argb; 169 new_blue -= ColorTransformDelta(green_to_blue, green); 170 new_blue -= ColorTransformDelta(red_to_blue, red); 171 return (new_blue & 0xff); 172 } 173 174 static void CollectColorBlueTransforms(const uint32_t* argb, int stride, 175 int tile_width, int tile_height, 176 int green_to_blue, int red_to_blue, 177 int histo[]) { 178 const int rtb = (red_to_blue << 16) | (red_to_blue & 0xffff); 179 const int gtb = (green_to_blue << 16) | (green_to_blue & 0xffff); 180 const uint32_t mask = 0xff00ffu; 181 while (tile_height-- > 0) { 182 int x; 183 const uint32_t* p_argb = argb; 184 argb += stride; 185 for (x = 0; x < (tile_width >> 1); ++x) { 186 int temp0, temp1, temp2, temp3, temp4, temp5, temp6; 187 __asm__ volatile ( 188 "lw %[temp0], 0(%[p_argb]) \n\t" 189 "lw %[temp1], 4(%[p_argb]) \n\t" 190 "precr.qb.ph %[temp2], %[temp0], %[temp1] \n\t" 191 "ins %[temp1], %[temp0], 16, 16 \n\t" 192 "shra.ph %[temp2], %[temp2], 8 \n\t" 193 "shra.ph %[temp3], %[temp1], 8 \n\t" 194 "mul.ph %[temp5], %[temp2], %[rtb] \n\t" 195 "mul.ph %[temp6], %[temp3], %[gtb] \n\t" 196 "and %[temp4], %[temp1], %[mask] \n\t" 197 "addiu %[p_argb], %[p_argb], 8 \n\t" 198 "shra.ph %[temp5], %[temp5], 5 \n\t" 199 "shra.ph %[temp6], %[temp6], 5 \n\t" 200 "subu.qb %[temp2], %[temp4], %[temp5] \n\t" 201 "subu.qb %[temp2], %[temp2], %[temp6] \n\t" 202 : [p_argb]"+&r"(p_argb), [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), 203 [temp2]"=&r"(temp2), [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), 204 [temp5]"=&r"(temp5), [temp6]"=&r"(temp6) 205 : [rtb]"r"(rtb), [gtb]"r"(gtb), [mask]"r"(mask) 206 : "memory", "hi", "lo" 207 ); 208 ++histo[(uint8_t)(temp2 >> 16)]; 209 ++histo[(uint8_t)temp2]; 210 } 211 if (tile_width & 1) { 212 ++histo[TransformColorBlue(green_to_blue, red_to_blue, *p_argb)]; 213 } 214 } 215 } 216 217 static WEBP_INLINE uint8_t TransformColorRed(uint8_t green_to_red, 218 uint32_t argb) { 219 const uint32_t green = argb >> 8; 220 uint32_t new_red = argb >> 16; 221 new_red -= ColorTransformDelta(green_to_red, green); 222 return (new_red & 0xff); 223 } 224 225 static void CollectColorRedTransforms(const uint32_t* argb, int stride, 226 int tile_width, int tile_height, 227 int green_to_red, int histo[]) { 228 const int gtr = (green_to_red << 16) | (green_to_red & 0xffff); 229 while (tile_height-- > 0) { 230 int x; 231 const uint32_t* p_argb = argb; 232 argb += stride; 233 for (x = 0; x < (tile_width >> 1); ++x) { 234 int temp0, temp1, temp2, temp3, temp4; 235 __asm__ volatile ( 236 "lw %[temp0], 0(%[p_argb]) \n\t" 237 "lw %[temp1], 4(%[p_argb]) \n\t" 238 "precrq.ph.w %[temp4], %[temp0], %[temp1] \n\t" 239 "ins %[temp1], %[temp0], 16, 16 \n\t" 240 "shra.ph %[temp3], %[temp1], 8 \n\t" 241 "mul.ph %[temp2], %[temp3], %[gtr] \n\t" 242 "addiu %[p_argb], %[p_argb], 8 \n\t" 243 "shra.ph %[temp2], %[temp2], 5 \n\t" 244 "subu.qb %[temp2], %[temp4], %[temp2] \n\t" 245 : [p_argb]"+&r"(p_argb), [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), 246 [temp2]"=&r"(temp2), [temp3]"=&r"(temp3), [temp4]"=&r"(temp4) 247 : [gtr]"r"(gtr) 248 : "memory", "hi", "lo" 249 ); 250 ++histo[(uint8_t)(temp2 >> 16)]; 251 ++histo[(uint8_t)temp2]; 252 } 253 if (tile_width & 1) { 254 ++histo[TransformColorRed(green_to_red, *p_argb)]; 255 } 256 } 257 } 258 259 //------------------------------------------------------------------------------ 260 // Entry point 261 262 extern void VP8LEncDspInitMIPSdspR2(void); 263 264 WEBP_TSAN_IGNORE_FUNCTION void VP8LEncDspInitMIPSdspR2(void) { 265 VP8LSubtractGreenFromBlueAndRed = SubtractGreenFromBlueAndRed; 266 VP8LTransformColor = TransformColor; 267 VP8LCollectColorBlueTransforms = CollectColorBlueTransforms; 268 VP8LCollectColorRedTransforms = CollectColorRedTransforms; 269 } 270 271 #else // !WEBP_USE_MIPS_DSP_R2 272 273 WEBP_DSP_INIT_STUB(VP8LEncDspInitMIPSdspR2) 274 275 #endif // WEBP_USE_MIPS_DSP_R2 276
