101 lines
5.7 KiB
C
101 lines
5.7 KiB
C
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// 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 = kVToR * v[0]; \
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temp3 = kVToG * v[0]; \
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temp2 = kUToG * u[0]; \
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temp4 = kUToB * u[0]; \
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temp0 = kYScale * y[0]; \
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temp1 += kRCst; \
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temp3 -= kGCst; \
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temp2 += temp3; \
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temp4 += kBCst; \
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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 = kYScale * y[1]; \
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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 = kVToR * v[0]; \
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temp3 = kVToG * v[0]; \
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temp2 = kUToG * u[0]; \
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temp4 = kUToB * u[0]; \
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temp0 = kYScale * y[0]; \
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temp1 += kRCst; \
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temp3 -= kGCst; \
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temp2 += temp3; \
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temp4 += kBCst; \
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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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#endif // WEBP_USE_MIPS32
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//------------------------------------------------------------------------------
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extern void WebPInitSamplersMIPS32(void);
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void WebPInitSamplersMIPS32(void) {
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#if defined(WEBP_USE_MIPS32)
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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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#endif // WEBP_USE_MIPS32
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}
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