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Open Source Computer Vision Library
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103 lines
5.7 KiB
103 lines
5.7 KiB
// Copyright 2014 Google Inc. All Rights Reserved. |
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// |
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// Use of this source code is governed by a BSD-style license |
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// that can be found in the COPYING file in the root of the source |
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// tree. An additional intellectual property rights grant can be found |
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// in the file PATENTS. All contributing project authors may |
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// be found in the AUTHORS file in the root of the source tree. |
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// ----------------------------------------------------------------------------- |
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// |
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// MIPS version of YUV to RGB upsampling functions. |
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// |
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// Author(s): Djordje Pesut (djordje.pesut@imgtec.com) |
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// Jovan Zelincevic (jovan.zelincevic@imgtec.com) |
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#include "./dsp.h" |
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#if defined(WEBP_USE_MIPS32) |
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#include "./yuv.h" |
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//------------------------------------------------------------------------------ |
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// simple point-sampling |
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#define ROW_FUNC(FUNC_NAME, XSTEP, R, G, B, A) \ |
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static void FUNC_NAME(const uint8_t* y, \ |
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const uint8_t* u, const uint8_t* v, \ |
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uint8_t* dst, int len) { \ |
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int i, r, g, b; \ |
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int temp0, temp1, temp2, temp3, temp4; \ |
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for (i = 0; i < (len >> 1); i++) { \ |
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temp1 = MultHi(v[0], 26149); \ |
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temp3 = MultHi(v[0], 13320); \ |
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temp2 = MultHi(u[0], 6419); \ |
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temp4 = MultHi(u[0], 33050); \ |
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temp0 = MultHi(y[0], 19077); \ |
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temp1 -= 14234; \ |
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temp3 -= 8708; \ |
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temp2 += temp3; \ |
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temp4 -= 17685; \ |
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r = VP8Clip8(temp0 + temp1); \ |
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g = VP8Clip8(temp0 - temp2); \ |
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b = VP8Clip8(temp0 + temp4); \ |
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temp0 = MultHi(y[1], 19077); \ |
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dst[R] = r; \ |
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dst[G] = g; \ |
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dst[B] = b; \ |
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if (A) dst[A] = 0xff; \ |
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r = VP8Clip8(temp0 + temp1); \ |
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g = VP8Clip8(temp0 - temp2); \ |
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b = VP8Clip8(temp0 + temp4); \ |
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dst[R + XSTEP] = r; \ |
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dst[G + XSTEP] = g; \ |
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dst[B + XSTEP] = b; \ |
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if (A) dst[A + XSTEP] = 0xff; \ |
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y += 2; \ |
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++u; \ |
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++v; \ |
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dst += 2 * XSTEP; \ |
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} \ |
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if (len & 1) { \ |
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temp1 = MultHi(v[0], 26149); \ |
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temp3 = MultHi(v[0], 13320); \ |
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temp2 = MultHi(u[0], 6419); \ |
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temp4 = MultHi(u[0], 33050); \ |
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temp0 = MultHi(y[0], 19077); \ |
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temp1 -= 14234; \ |
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temp3 -= 8708; \ |
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temp2 += temp3; \ |
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temp4 -= 17685; \ |
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r = VP8Clip8(temp0 + temp1); \ |
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g = VP8Clip8(temp0 - temp2); \ |
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b = VP8Clip8(temp0 + temp4); \ |
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dst[R] = r; \ |
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dst[G] = g; \ |
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dst[B] = b; \ |
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if (A) dst[A] = 0xff; \ |
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} \ |
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} |
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ROW_FUNC(YuvToRgbRow, 3, 0, 1, 2, 0) |
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ROW_FUNC(YuvToRgbaRow, 4, 0, 1, 2, 3) |
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ROW_FUNC(YuvToBgrRow, 3, 2, 1, 0, 0) |
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ROW_FUNC(YuvToBgraRow, 4, 2, 1, 0, 3) |
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#undef ROW_FUNC |
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//------------------------------------------------------------------------------ |
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// Entry point |
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extern void WebPInitSamplersMIPS32(void); |
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WEBP_TSAN_IGNORE_FUNCTION void WebPInitSamplersMIPS32(void) { |
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WebPSamplers[MODE_RGB] = YuvToRgbRow; |
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WebPSamplers[MODE_RGBA] = YuvToRgbaRow; |
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WebPSamplers[MODE_BGR] = YuvToBgrRow; |
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WebPSamplers[MODE_BGRA] = YuvToBgraRow; |
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} |
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#else // !WEBP_USE_MIPS32 |
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WEBP_DSP_INIT_STUB(WebPInitSamplersMIPS32) |
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#endif // WEBP_USE_MIPS32
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