| // Copyright 2014 Google Inc. All Rights Reserved. |
| // |
| // Use of this source code is governed by a BSD-style license |
| // that can be found in the COPYING file in the root of the source |
| // tree. An additional intellectual property rights grant can be found |
| // in the file PATENTS. All contributing project authors may |
| // be found in the AUTHORS file in the root of the source tree. |
| // ----------------------------------------------------------------------------- |
| // |
| // MIPS version of YUV to RGB upsampling functions. |
| // |
| // Author(s): Djordje Pesut (djordje.pesut@imgtec.com) |
| // Jovan Zelincevic (jovan.zelincevic@imgtec.com) |
| |
| #include "./dsp.h" |
| |
| #if defined(WEBP_USE_MIPS32) |
| |
| #include "./yuv.h" |
| |
| //------------------------------------------------------------------------------ |
| // simple point-sampling |
| |
| #define ROW_FUNC(FUNC_NAME, XSTEP, R, G, B, A) \ |
| static void FUNC_NAME(const uint8_t* y, \ |
| const uint8_t* u, const uint8_t* v, \ |
| uint8_t* dst, int len) { \ |
| int i, r, g, b; \ |
| int temp0, temp1, temp2, temp3, temp4; \ |
| for (i = 0; i < (len >> 1); i++) { \ |
| temp1 = kVToR * v[0]; \ |
| temp3 = kVToG * v[0]; \ |
| temp2 = kUToG * u[0]; \ |
| temp4 = kUToB * u[0]; \ |
| temp0 = kYScale * y[0]; \ |
| temp1 += kRCst; \ |
| temp3 -= kGCst; \ |
| temp2 += temp3; \ |
| temp4 += kBCst; \ |
| r = VP8Clip8(temp0 + temp1); \ |
| g = VP8Clip8(temp0 - temp2); \ |
| b = VP8Clip8(temp0 + temp4); \ |
| temp0 = kYScale * y[1]; \ |
| dst[R] = r; \ |
| dst[G] = g; \ |
| dst[B] = b; \ |
| if (A) dst[A] = 0xff; \ |
| r = VP8Clip8(temp0 + temp1); \ |
| g = VP8Clip8(temp0 - temp2); \ |
| b = VP8Clip8(temp0 + temp4); \ |
| dst[R + XSTEP] = r; \ |
| dst[G + XSTEP] = g; \ |
| dst[B + XSTEP] = b; \ |
| if (A) dst[A + XSTEP] = 0xff; \ |
| y += 2; \ |
| ++u; \ |
| ++v; \ |
| dst += 2 * XSTEP; \ |
| } \ |
| if (len & 1) { \ |
| temp1 = kVToR * v[0]; \ |
| temp3 = kVToG * v[0]; \ |
| temp2 = kUToG * u[0]; \ |
| temp4 = kUToB * u[0]; \ |
| temp0 = kYScale * y[0]; \ |
| temp1 += kRCst; \ |
| temp3 -= kGCst; \ |
| temp2 += temp3; \ |
| temp4 += kBCst; \ |
| r = VP8Clip8(temp0 + temp1); \ |
| g = VP8Clip8(temp0 - temp2); \ |
| b = VP8Clip8(temp0 + temp4); \ |
| dst[R] = r; \ |
| dst[G] = g; \ |
| dst[B] = b; \ |
| if (A) dst[A] = 0xff; \ |
| } \ |
| } |
| |
| ROW_FUNC(YuvToRgbRow, 3, 0, 1, 2, 0) |
| ROW_FUNC(YuvToRgbaRow, 4, 0, 1, 2, 3) |
| ROW_FUNC(YuvToBgrRow, 3, 2, 1, 0, 0) |
| ROW_FUNC(YuvToBgraRow, 4, 2, 1, 0, 3) |
| |
| #undef ROW_FUNC |
| |
| #endif // WEBP_USE_MIPS32 |
| |
| //------------------------------------------------------------------------------ |
| |
| extern void WebPInitSamplersMIPS32(void); |
| |
| void WebPInitSamplersMIPS32(void) { |
| #if defined(WEBP_USE_MIPS32) |
| WebPSamplers[MODE_RGB] = YuvToRgbRow; |
| WebPSamplers[MODE_RGBA] = YuvToRgbaRow; |
| WebPSamplers[MODE_BGR] = YuvToBgrRow; |
| WebPSamplers[MODE_BGRA] = YuvToBgraRow; |
| #endif // WEBP_USE_MIPS32 |
| } |
