1 // Copyright 2014 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 // MIPS version of YUV to RGB upsampling functions. 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_MIPS32) 18 19 #include "./yuv.h" 20 21 //------------------------------------------------------------------------------ 22 // simple point-sampling 23 24 #define ROW_FUNC(FUNC_NAME, XSTEP, R, G, B, A) \ 25 static void FUNC_NAME(const uint8_t* y, \ 26 const uint8_t* u, const uint8_t* v, \ 27 uint8_t* dst, int len) { \ 28 int i, r, g, b; \ 29 int temp0, temp1, temp2, temp3, temp4; \ 30 for (i = 0; i < (len >> 1); i++) { \ 31 temp1 = MultHi(v[0], 26149); \ 32 temp3 = MultHi(v[0], 13320); \ 33 temp2 = MultHi(u[0], 6419); \ 34 temp4 = MultHi(u[0], 33050); \ 35 temp0 = MultHi(y[0], 19077); \ 36 temp1 -= 14234; \ 37 temp3 -= 8708; \ 38 temp2 += temp3; \ 39 temp4 -= 17685; \ 40 r = VP8Clip8(temp0 + temp1); \ 41 g = VP8Clip8(temp0 - temp2); \ 42 b = VP8Clip8(temp0 + temp4); \ 43 temp0 = MultHi(y[1], 19077); \ 44 dst[R] = r; \ 45 dst[G] = g; \ 46 dst[B] = b; \ 47 if (A) dst[A] = 0xff; \ 48 r = VP8Clip8(temp0 + temp1); \ 49 g = VP8Clip8(temp0 - temp2); \ 50 b = VP8Clip8(temp0 + temp4); \ 51 dst[R + XSTEP] = r; \ 52 dst[G + XSTEP] = g; \ 53 dst[B + XSTEP] = b; \ 54 if (A) dst[A + XSTEP] = 0xff; \ 55 y += 2; \ 56 ++u; \ 57 ++v; \ 58 dst += 2 * XSTEP; \ 59 } \ 60 if (len & 1) { \ 61 temp1 = MultHi(v[0], 26149); \ 62 temp3 = MultHi(v[0], 13320); \ 63 temp2 = MultHi(u[0], 6419); \ 64 temp4 = MultHi(u[0], 33050); \ 65 temp0 = MultHi(y[0], 19077); \ 66 temp1 -= 14234; \ 67 temp3 -= 8708; \ 68 temp2 += temp3; \ 69 temp4 -= 17685; \ 70 r = VP8Clip8(temp0 + temp1); \ 71 g = VP8Clip8(temp0 - temp2); \ 72 b = VP8Clip8(temp0 + temp4); \ 73 dst[R] = r; \ 74 dst[G] = g; \ 75 dst[B] = b; \ 76 if (A) dst[A] = 0xff; \ 77 } \ 78 } 79 80 ROW_FUNC(YuvToRgbRow, 3, 0, 1, 2, 0) 81 ROW_FUNC(YuvToRgbaRow, 4, 0, 1, 2, 3) 82 ROW_FUNC(YuvToBgrRow, 3, 2, 1, 0, 0) 83 ROW_FUNC(YuvToBgraRow, 4, 2, 1, 0, 3) 84 85 #undef ROW_FUNC 86 87 //------------------------------------------------------------------------------ 88 // Entry point 89 90 extern void WebPInitSamplersMIPS32(void); 91 92 WEBP_TSAN_IGNORE_FUNCTION void WebPInitSamplersMIPS32(void) { 93 WebPSamplers[MODE_RGB] = YuvToRgbRow; 94 WebPSamplers[MODE_RGBA] = YuvToRgbaRow; 95 WebPSamplers[MODE_BGR] = YuvToBgrRow; 96 WebPSamplers[MODE_BGRA] = YuvToBgraRow; 97 } 98 99 #else // !WEBP_USE_MIPS32 100 101 WEBP_DSP_INIT_STUB(WebPInitSamplersMIPS32) 102 103 #endif // WEBP_USE_MIPS32 104
