| Vikas Arora | af51b94 | 2014-08-28 10:51:12 -0700 | [diff] [blame] | 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@imgtec.com) |
| 13 | // Jovan Zelincevic (jovan.zelincevic@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 = kVToR * v[0]; \ |
| 32 | temp3 = kVToG * v[0]; \ |
| 33 | temp2 = kUToG * u[0]; \ |
| 34 | temp4 = kUToB * u[0]; \ |
| 35 | temp0 = kYScale * y[0]; \ |
| 36 | temp1 += kRCst; \ |
| 37 | temp3 -= kGCst; \ |
| 38 | temp2 += temp3; \ |
| 39 | temp4 += kBCst; \ |
| 40 | r = VP8Clip8(temp0 + temp1); \ |
| 41 | g = VP8Clip8(temp0 - temp2); \ |
| 42 | b = VP8Clip8(temp0 + temp4); \ |
| 43 | temp0 = kYScale * y[1]; \ |
| 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 = kVToR * v[0]; \ |
| 62 | temp3 = kVToG * v[0]; \ |
| 63 | temp2 = kUToG * u[0]; \ |
| 64 | temp4 = kUToB * u[0]; \ |
| 65 | temp0 = kYScale * y[0]; \ |
| 66 | temp1 += kRCst; \ |
| 67 | temp3 -= kGCst; \ |
| 68 | temp2 += temp3; \ |
| 69 | temp4 += kBCst; \ |
| 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 | #endif // WEBP_USE_MIPS32 |
| 88 | |
| 89 | //------------------------------------------------------------------------------ |
| 90 | |
| 91 | extern void WebPInitSamplersMIPS32(void); |
| 92 | |
| 93 | void WebPInitSamplersMIPS32(void) { |
| 94 | #if defined(WEBP_USE_MIPS32) |
| 95 | WebPSamplers[MODE_RGB] = YuvToRgbRow; |
| 96 | WebPSamplers[MODE_RGBA] = YuvToRgbaRow; |
| 97 | WebPSamplers[MODE_BGR] = YuvToBgrRow; |
| 98 | WebPSamplers[MODE_BGRA] = YuvToBgraRow; |
| 99 | #endif // WEBP_USE_MIPS32 |
| 100 | } |