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dsp_yuv_mips32.c
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// 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 ([email protected])
// Jovan Zelincevic ([email protected])
#include "dsp_dsp.h"
#if defined(WEBP_USE_MIPS32)
#include "dsp_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 = MultHi(v[0], 26149); \
temp3 = MultHi(v[0], 13320); \
temp2 = MultHi(u[0], 6419); \
temp4 = MultHi(u[0], 33050); \
temp0 = MultHi(y[0], 19077); \
temp1 -= 14234; \
temp3 -= 8708; \
temp2 += temp3; \
temp4 -= 17685; \
r = VP8Clip8(temp0 + temp1); \
g = VP8Clip8(temp0 - temp2); \
b = VP8Clip8(temp0 + temp4); \
temp0 = MultHi(y[1], 19077); \
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 = MultHi(v[0], 26149); \
temp3 = MultHi(v[0], 13320); \
temp2 = MultHi(u[0], 6419); \
temp4 = MultHi(u[0], 33050); \
temp0 = MultHi(y[0], 19077); \
temp1 -= 14234; \
temp3 -= 8708; \
temp2 += temp3; \
temp4 -= 17685; \
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_MIPS32, 3, 0, 1, 2, 0)
ROW_FUNC(YuvToRgbaRow_MIPS32, 4, 0, 1, 2, 3)
ROW_FUNC(YuvToBgrRow_MIPS32, 3, 2, 1, 0, 0)
ROW_FUNC(YuvToBgraRow_MIPS32, 4, 2, 1, 0, 3)
#undef ROW_FUNC
//------------------------------------------------------------------------------
// Entry point
extern void WebPInitSamplersMIPS32(void);
WEBP_TSAN_IGNORE_FUNCTION void WebPInitSamplersMIPS32(void) {
WebPSamplers[MODE_RGB] = YuvToRgbRow_MIPS32;
WebPSamplers[MODE_RGBA] = YuvToRgbaRow_MIPS32;
WebPSamplers[MODE_BGR] = YuvToBgrRow_MIPS32;
WebPSamplers[MODE_BGRA] = YuvToBgraRow_MIPS32;
}
#else // !WEBP_USE_MIPS32
WEBP_DSP_INIT_STUB(WebPInitSamplersMIPS32)
#endif // WEBP_USE_MIPS32