104 lines
5.7 KiB
C
104 lines
5.7 KiB
C
|
// 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
|
||
|
|
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
// Entry point
|
||
|
|
|
||
|
|
extern void WebPInitSamplersMIPS32(void);
|
||
|
|
|
||
|
|
WEBP_TSAN_IGNORE_FUNCTION void WebPInitSamplersMIPS32(void) {
|
||
|
|
WebPSamplers[MODE_RGB] = YuvToRgbRow;
|
||
|
|
WebPSamplers[MODE_RGBA] = YuvToRgbaRow;
|
||
|
|
WebPSamplers[MODE_BGR] = YuvToBgrRow;
|
||
|
|
WebPSamplers[MODE_BGRA] = YuvToBgraRow;
|
||
|
|
}
|
||
|
|
|
||
|
|
#else // !WEBP_USE_MIPS32
|
||
|
|
|
||
|
|
WEBP_DSP_INIT_STUB(WebPInitSamplersMIPS32)
|
||
|
|
|
||
|
|
#endif // WEBP_USE_MIPS32
|