godot/thirdparty/libwebp/src/dsp/yuv.c

// Copyright 2010 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.
// -----------------------------------------------------------------------------
//
// YUV->RGB conversion functions
//
// Author: Skal ([email protected])

#include "src/dsp/yuv.h"

#include <assert.h>
#include <stdlib.h>

//-----------------------------------------------------------------------------
// Plain-C version

#define ROW_FUNC …                                                                              \

// All variants implemented.
ROW_FUNC(YuvToRgbRow,      VP8YuvToRgb,  3)
ROW_FUNC(YuvToBgrRow,      VP8YuvToBgr,  3)
ROW_FUNC(YuvToRgbaRow,     VP8YuvToRgba, 4)
ROW_FUNC(YuvToBgraRow,     VP8YuvToBgra, 4)
ROW_FUNC(YuvToArgbRow,     VP8YuvToArgb, 4)
ROW_FUNC(YuvToRgba4444Row, VP8YuvToRgba4444, 2)
ROW_FUNC(YuvToRgb565Row,   VP8YuvToRgb565, 2)

#undef ROW_FUNC

// Main call for processing a plane with a WebPSamplerRowFunc function:
void WebPSamplerProcessPlane(const uint8_t* y, int y_stride,
                             const uint8_t* u, const uint8_t* v, int uv_stride,
                             uint8_t* dst, int dst_stride,
                             int width, int height, WebPSamplerRowFunc func) { … }

//-----------------------------------------------------------------------------
// Main call

WebPSamplerRowFunc WebPSamplers[MODE_LAST];

extern VP8CPUInfo VP8GetCPUInfo;
extern void WebPInitSamplersSSE2(void);
extern void WebPInitSamplersSSE41(void);
extern void WebPInitSamplersMIPS32(void);
extern void WebPInitSamplersMIPSdspR2(void);

WEBP_DSP_INIT_FUNC(WebPInitSamplers) { … }

//-----------------------------------------------------------------------------
// ARGB -> YUV converters

static void ConvertARGBToY_C(const uint32_t* argb, uint8_t* y, int width) { … }

void WebPConvertARGBToUV_C(const uint32_t* argb, uint8_t* u, uint8_t* v,
                           int src_width, int do_store) { … }

//-----------------------------------------------------------------------------

static void ConvertRGB24ToY_C(const uint8_t* rgb, uint8_t* y, int width) { … }

static void ConvertBGR24ToY_C(const uint8_t* bgr, uint8_t* y, int width) { … }

void WebPConvertRGBA32ToUV_C(const uint16_t* rgb,
                             uint8_t* u, uint8_t* v, int width) { … }

//-----------------------------------------------------------------------------

void (*WebPConvertRGB24ToY)(const uint8_t* rgb, uint8_t* y, int width);
void (*WebPConvertBGR24ToY)(const uint8_t* bgr, uint8_t* y, int width);
void (*WebPConvertRGBA32ToUV)(const uint16_t* rgb,
                              uint8_t* u, uint8_t* v, int width);

void (*WebPConvertARGBToY)(const uint32_t* argb, uint8_t* y, int width);
void (*WebPConvertARGBToUV)(const uint32_t* argb, uint8_t* u, uint8_t* v,
                            int src_width, int do_store);

extern void WebPInitConvertARGBToYUVSSE2(void);
extern void WebPInitConvertARGBToYUVSSE41(void);
extern void WebPInitConvertARGBToYUVNEON(void);

WEBP_DSP_INIT_FUNC(WebPInitConvertARGBToYUV) { … }