/**

 * FreeRDP: A Remote Desktop Protocol Implementation

 * Generic YUV/RGB conversion operations

 *

 * Copyright 2014 Marc-Andre Moreau <marcandre.moreau@gmail.com>

 * Copyright 2015-2017 Armin Novak <armin.novak@thincast.com>

 * Copyright 2015-2017 Norbert Federa <norbert.federa@thincast.com>

 * Copyright 2015-2017 Vic Lee

 * Copyright 2015-2017 Thincast Technologies GmbH

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#include <freerdp/types.h>

#include <freerdp/primitives.h>

#include <freerdp/codec/color.h>

#include "prim_internal.h"

static pstatus_t general_LumaToYUV444(const BYTE* const pSrcRaw[3], const UINT32 srcStep[3],

                                      BYTE* pDstRaw[3], const UINT32 dstStep[3],

                                      const RECTANGLE_16* roi)

{

	UINT32 x, y;

	const UINT32 nWidth = roi->right - roi->left;

	const UINT32 nHeight = roi->bottom - roi->top;

	const UINT32 halfWidth = (nWidth + 1) / 2;

	const UINT32 halfHeight = (nHeight + 1) / 2;

	const UINT32 oddY = 1;

	const UINT32 evenY = 0;

	const UINT32 oddX = 1;

	const UINT32 evenX = 0;

	const BYTE* pSrc[3] = { pSrcRaw[0] + roi->top * srcStep[0] + roi->left,

		                    pSrcRaw[1] + roi->top / 2 * srcStep[1] + roi->left / 2,

		                    pSrcRaw[2] + roi->top / 2 * srcStep[2] + roi->left / 2 };

	BYTE* pDst[3] = { pDstRaw[0] + roi->top * dstStep[0] + roi->left,

		              pDstRaw[1] + roi->top * dstStep[1] + roi->left,

		              pDstRaw[2] + roi->top * dstStep[2] + roi->left };

	/* Y data is already here... */

	/* B1 */

	for (y = 0; y < nHeight; y++)

	{

		const BYTE* Ym = pSrc[0] + srcStep[0] * y;

		BYTE* pY = pDst[0] + dstStep[0] * y;

		memcpy(pY, Ym, nWidth);

	}

	/* The first half of U, V are already here part of this frame. */

	/* B2 and B3 */

	for (y = 0; y < halfHeight; y++)

	{

		const UINT32 val2y = (2 * y + evenY);

		const UINT32 val2y1 = val2y + oddY;

		const BYTE* Um = pSrc[1] + srcStep[1] * y;

		const BYTE* Vm = pSrc[2] + srcStep[2] * y;

		BYTE* pU = pDst[1] + dstStep[1] * val2y;

		BYTE* pV = pDst[2] + dstStep[2] * val2y;

		BYTE* pU1 = pDst[1] + dstStep[1] * val2y1;

		BYTE* pV1 = pDst[2] + dstStep[2] * val2y1;

		for (x = 0; x < halfWidth; x++)

		{

			const UINT32 val2x = 2 * x + evenX;

			const UINT32 val2x1 = val2x + oddX;

			pU[val2x] = Um[x];

			pV[val2x] = Vm[x];

			pU[val2x1] = Um[x];

			pV[val2x1] = Vm[x];

			pU1[val2x] = Um[x];

			pV1[val2x] = Vm[x];

			pU1[val2x1] = Um[x];

			pV1[val2x1] = Vm[x];

		}

	}

	return PRIMITIVES_SUCCESS;

}

static pstatus_t general_ChromaFilter(BYTE* pDst[3], const UINT32 dstStep[3],

                                      const RECTANGLE_16* roi)

{

	const UINT32 oddY = 1;

	const UINT32 evenY = 0;

	const UINT32 nWidth = roi->right - roi->left;

	const UINT32 nHeight = roi->bottom - roi->top;

	const UINT32 halfHeight = (nHeight + 1) / 2;

	const UINT32 halfWidth = (nWidth + 1) / 2;

	UINT32 x, y;

	/* Filter */

	for (y = roi->top; y < halfHeight + roi->top; y++)

	{

		const UINT32 val2y = (y * 2 + evenY);

		const UINT32 val2y1 = val2y + oddY;

		BYTE* pU1 = pDst[1] + dstStep[1] * val2y1;

		BYTE* pV1 = pDst[2] + dstStep[2] * val2y1;

		BYTE* pU = pDst[1] + dstStep[1] * val2y;

		BYTE* pV = pDst[2] + dstStep[2] * val2y;

		if (val2y1 > nHeight)

			continue;

		for (x = roi->left; x < halfWidth + roi->left; x++)

		{

			const UINT32 val2x = (x * 2);

			const UINT32 val2x1 = val2x + 1;

			const INT32 up = pU[val2x] * 4;

			const INT32 vp = pV[val2x] * 4;

			INT32 u2020;

			INT32 v2020;

			if (val2x1 > nWidth)

				continue;

			u2020 = up - pU[val2x1] - pU1[val2x] - pU1[val2x1];

			v2020 = vp - pV[val2x1] - pV1[val2x] - pV1[val2x1];

			pU[val2x] = CLIP(u2020);

			pV[val2x] = CLIP(v2020);

		}

	}

	return PRIMITIVES_SUCCESS;

}

static pstatus_t general_ChromaV1ToYUV444(const BYTE* const pSrcRaw[3], const UINT32 srcStep[3],

                                          BYTE* pDstRaw[3], const UINT32 dstStep[3],

                                          const RECTANGLE_16* roi)

{

	const UINT32 mod = 16;

	UINT32 uY = 0;

	UINT32 vY = 0;

	UINT32 x, y;

	const UINT32 nWidth = roi->right - roi->left;

	const UINT32 nHeight = roi->bottom - roi->top;

	const UINT32 halfWidth = (nWidth) / 2;

	const UINT32 halfHeight = (nHeight) / 2;

	const UINT32 oddY = 1;

	const UINT32 evenY = 0;

	const UINT32 oddX = 1;

	/* The auxilary frame is aligned to multiples of 16x16.

	 * We need the padded height for B4 and B5 conversion. */

	const UINT32 padHeigth = nHeight + 16 - nHeight % 16;

	const BYTE* pSrc[3] = { pSrcRaw[0] + roi->top * srcStep[0] + roi->left,

		                    pSrcRaw[1] + roi->top / 2 * srcStep[1] + roi->left / 2,

		                    pSrcRaw[2] + roi->top / 2 * srcStep[2] + roi->left / 2 };

	BYTE* pDst[3] = { pDstRaw[0] + roi->top * dstStep[0] + roi->left,

		              pDstRaw[1] + roi->top * dstStep[1] + roi->left,

		              pDstRaw[2] + roi->top * dstStep[2] + roi->left };

	/* The second half of U and V is a bit more tricky... */

	/* B4 and B5 */

	for (y = 0; y < padHeigth; y++)

	{

		const BYTE* Ya = pSrc[0] + srcStep[0] * y;

		BYTE* pX;

		if ((y) % mod < (mod + 1) / 2)

		{

			const UINT32 pos = (2 * uY++ + oddY);

			if (pos >= nHeight)

				continue;

			pX = pDst[1] + dstStep[1] * pos;

		}

		else

		{

			const UINT32 pos = (2 * vY++ + oddY);

			if (pos >= nHeight)

				continue;

			pX = pDst[2] + dstStep[2] * pos;

		}

		memcpy(pX, Ya, nWidth);

	}

	/* B6 and B7 */

	for (y = 0; y < halfHeight; y++)

	{

		const UINT32 val2y = (y * 2 + evenY);

		const BYTE* Ua = pSrc[1] + srcStep[1] * y;

		const BYTE* Va = pSrc[2] + srcStep[2] * y;

		BYTE* pU = pDst[1] + dstStep[1] * val2y;

		BYTE* pV = pDst[2] + dstStep[2] * val2y;

		for (x = 0; x < halfWidth; x++)

		{

			const UINT32 val2x1 = (x * 2 + oddX);

			pU[val2x1] = Ua[x];

			pV[val2x1] = Va[x];

		}

	}

	/* Filter */

	return general_ChromaFilter(pDst, dstStep, roi);

}

static pstatus_t general_ChromaV2ToYUV444(const BYTE* const pSrc[3], const UINT32 srcStep[3],

                                          UINT32 nTotalWidth, UINT32 nTotalHeight, BYTE* pDst[3],

                                          const UINT32 dstStep[3], const RECTANGLE_16* roi)

{

	UINT32 x, y;

	const UINT32 nWidth = roi->right - roi->left;

	const UINT32 nHeight = roi->bottom - roi->top;

	const UINT32 halfWidth = (nWidth + 1) / 2;

	const UINT32 halfHeight = (nHeight + 1) / 2;

	const UINT32 quaterWidth = (nWidth + 3) / 4;

	/* B4 and B5: odd UV values for width/2, height */

	for (y = 0; y < nHeight; y++)

	{

		const UINT32 yTop = y + roi->top;

		const BYTE* pYaU = pSrc[0] + srcStep[0] * yTop + roi->left / 2;

		const BYTE* pYaV = pYaU + nTotalWidth / 2;

		BYTE* pU = pDst[1] + dstStep[1] * yTop + roi->left;

		BYTE* pV = pDst[2] + dstStep[2] * yTop + roi->left;

		for (x = 0; x < halfWidth; x++)

		{

			const UINT32 odd = 2 * x + 1;

			pU[odd] = *pYaU++;

			pV[odd] = *pYaV++;

		}

	}

	/* B6 - B9 */

	for (y = 0; y < halfHeight; y++)

	{

		const BYTE* pUaU = pSrc[1] + srcStep[1] * (y + roi->top / 2) + roi->left / 4;

		const BYTE* pUaV = pUaU + nTotalWidth / 4;

		const BYTE* pVaU = pSrc[2] + srcStep[2] * (y + roi->top / 2) + roi->left / 4;

		const BYTE* pVaV = pVaU + nTotalWidth / 4;

		BYTE* pU = pDst[1] + dstStep[1] * (2 * y + 1 + roi->top) + roi->left;

		BYTE* pV = pDst[2] + dstStep[2] * (2 * y + 1 + roi->top) + roi->left;

		for (x = 0; x < quaterWidth; x++)

		{

			pU[4 * x + 0] = *pUaU++;

			pV[4 * x + 0] = *pUaV++;

			pU[4 * x + 2] = *pVaU++;

			pV[4 * x + 2] = *pVaV++;

		}

	}

	return general_ChromaFilter(pDst, dstStep, roi);

}

static pstatus_t general_YUV420CombineToYUV444(avc444_frame_type type, const BYTE* const pSrc[3],

                                               const UINT32 srcStep[3], UINT32 nWidth,

                                               UINT32 nHeight, BYTE* pDst[3],

                                               const UINT32 dstStep[3], const RECTANGLE_16* roi)

{

	if (!pSrc || !pSrc[0] || !pSrc[1] || !pSrc[2])

		return -1;

	if (!pDst || !pDst[0] || !pDst[1] || !pDst[2])

		return -1;

	if (!roi)

		return -1;

	switch (type)

	{

		case AVC444_LUMA:

			return general_LumaToYUV444(pSrc, srcStep, pDst, dstStep, roi);

		case AVC444_CHROMAv1:

			return general_ChromaV1ToYUV444(pSrc, srcStep, pDst, dstStep, roi);

		case AVC444_CHROMAv2:

			return general_ChromaV2ToYUV444(pSrc, srcStep, nWidth, nHeight, pDst, dstStep, roi);

		default:

			return -1;

	}

}

static pstatus_t general_YUV444SplitToYUV420(const BYTE* const pSrc[3], const UINT32 srcStep[3],

                                             BYTE* pMainDst[3], const UINT32 dstMainStep[3],

                                             BYTE* pAuxDst[3], const UINT32 dstAuxStep[3],

                                             const prim_size_t* roi)

{

	UINT32 x, y, uY = 0, vY = 0;

	UINT32 halfWidth, halfHeight;

	/* The auxilary frame is aligned to multiples of 16x16.

	 * We need the padded height for B4 and B5 conversion. */

	const UINT32 padHeigth = roi->height + 16 - roi->height % 16;

	halfWidth = (roi->width + 1) / 2;

	halfHeight = (roi->height + 1) / 2;

	/* B1 */

	for (y = 0; y < roi->height; y++)

	{

		const BYTE* pSrcY = pSrc[0] + y * srcStep[0];

		BYTE* pY = pMainDst[0] + y * dstMainStep[0];

		memcpy(pY, pSrcY, roi->width);

	}

	/* B2 and B3 */

	for (y = 0; y < halfHeight; y++)

	{

		const BYTE* pSrcU = pSrc[1] + 2 * y * srcStep[1];

		const BYTE* pSrcV = pSrc[2] + 2 * y * srcStep[2];

		const BYTE* pSrcU1 = pSrc[1] + (2 * y + 1) * srcStep[1];

		const BYTE* pSrcV1 = pSrc[2] + (2 * y + 1) * srcStep[2];

		BYTE* pU = pMainDst[1] + y * dstMainStep[1];

		BYTE* pV = pMainDst[2] + y * dstMainStep[2];

		for (x = 0; x < halfWidth; x++)

		{

			/* Filter */

			const INT32 u = pSrcU[2 * x] + pSrcU[2 * x + 1] + pSrcU1[2 * x] + pSrcU1[2 * x + 1];

			const INT32 v = pSrcV[2 * x] + pSrcV[2 * x + 1] + pSrcV1[2 * x] + pSrcV1[2 * x + 1];

			pU[x] = CLIP(u / 4L);

			pV[x] = CLIP(v / 4L);

		}

	}

	/* B4 and B5 */

	for (y = 0; y < padHeigth; y++)

	{

		BYTE* pY = pAuxDst[0] + y * dstAuxStep[0];

		if (y % 16 < 8)

		{

			const UINT32 pos = (2 * uY++ + 1);

			const BYTE* pSrcU = pSrc[1] + pos * srcStep[1];

			if (pos >= roi->height)

				continue;

			memcpy(pY, pSrcU, roi->width);

		}

		else

		{

			const UINT32 pos = (2 * vY++ + 1);

			const BYTE* pSrcV = pSrc[2] + pos * srcStep[2];

			if (pos >= roi->height)

				continue;

			memcpy(pY, pSrcV, roi->width);

		}

	}

	/* B6 and B7 */

	for (y = 0; y < halfHeight; y++)

	{

		const BYTE* pSrcU = pSrc[1] + 2 * y * srcStep[1];

		const BYTE* pSrcV = pSrc[2] + 2 * y * srcStep[2];

		BYTE* pU = pAuxDst[1] + y * dstAuxStep[1];

		BYTE* pV = pAuxDst[2] + y * dstAuxStep[2];

		for (x = 0; x < halfWidth; x++)

		{

			pU[x] = pSrcU[2 * x + 1];

			pV[x] = pSrcV[2 * x + 1];

		}

	}

	return PRIMITIVES_SUCCESS;

}

static pstatus_t general_YUV444ToRGB_8u_P3AC4R_general(const BYTE* const pSrc[3],

                                                       const UINT32 srcStep[3], BYTE* pDst,

                                                       UINT32 dstStep, UINT32 DstFormat,

                                                       const prim_size_t* roi)

{

	UINT32 x, y;

	UINT32 nWidth, nHeight;

	const DWORD formatSize = GetBytesPerPixel(DstFormat);

	fkt_writePixel writePixel = getPixelWriteFunction(DstFormat);

	nWidth = roi->width;

	nHeight = roi->height;

	for (y = 0; y < nHeight; y++)

	{

		const BYTE* pY = pSrc[0] + y * srcStep[0];

		const BYTE* pU = pSrc[1] + y * srcStep[1];

		const BYTE* pV = pSrc[2] + y * srcStep[2];

		BYTE* pRGB = pDst + y * dstStep;

		for (x = 0; x < nWidth; x++)

		{

			const BYTE Y = pY[x];

			const BYTE U = pU[x];

			const BYTE V = pV[x];

			const BYTE r = YUV2R(Y, U, V);

			const BYTE g = YUV2G(Y, U, V);

			const BYTE b = YUV2B(Y, U, V);

			pRGB = (*writePixel)(pRGB, formatSize, DstFormat, r, g, b, 0xFF);

		}

	}

	return PRIMITIVES_SUCCESS;

}

static pstatus_t general_YUV444ToRGB_8u_P3AC4R_BGRX(const BYTE* const pSrc[3],

                                                    const UINT32 srcStep[3], BYTE* pDst,

                                                    UINT32 dstStep, UINT32 DstFormat,

                                                    const prim_size_t* roi)

{

	UINT32 x, y;

	UINT32 nWidth, nHeight;

	const DWORD formatSize = GetBytesPerPixel(DstFormat);

	nWidth = roi->width;

	nHeight = roi->height;

	for (y = 0; y < nHeight; y++)

	{

		const BYTE* pY = pSrc[0] + y * srcStep[0];

		const BYTE* pU = pSrc[1] + y * srcStep[1];

		const BYTE* pV = pSrc[2] + y * srcStep[2];

		BYTE* pRGB = pDst + y * dstStep;

		for (x = 0; x < nWidth; x++)

		{

			const BYTE Y = pY[x];

			const BYTE U = pU[x];

			const BYTE V = pV[x];

			const BYTE r = YUV2R(Y, U, V);

			const BYTE g = YUV2G(Y, U, V);

			const BYTE b = YUV2B(Y, U, V);

			pRGB = writePixelBGRX(pRGB, formatSize, DstFormat, r, g, b, 0xFF);

		}

	}

	return PRIMITIVES_SUCCESS;

}

static pstatus_t general_YUV444ToRGB_8u_P3AC4R(const BYTE* const pSrc[3], const UINT32 srcStep[3],

                                               BYTE* pDst, UINT32 dstStep, UINT32 DstFormat,

                                               const prim_size_t* roi)

{

	switch (DstFormat)

	{

		case PIXEL_FORMAT_BGRA32:

		case PIXEL_FORMAT_BGRX32:

			return general_YUV444ToRGB_8u_P3AC4R_BGRX(pSrc, srcStep, pDst, dstStep, DstFormat, roi);

		default:

			return general_YUV444ToRGB_8u_P3AC4R_general(pSrc, srcStep, pDst, dstStep, DstFormat,

			                                             roi);

	}

}

/**

 * | R |   ( | 256     0    403 | |    Y    | )

 * | G | = ( | 256   -48   -120 | | U - 128 | ) >> 8

 * | B |   ( | 256   475      0 | | V - 128 | )

 */

static pstatus_t general_YUV420ToRGB_8u_P3AC4R(const BYTE* const pSrc[3], const UINT32 srcStep[3],

                                               BYTE* pDst, UINT32 dstStep, UINT32 DstFormat,

                                               const prim_size_t* roi)

{

	UINT32 x, y;

	UINT32 dstPad;

	UINT32 srcPad[3];

	BYTE Y, U, V;

	UINT32 halfWidth;

	UINT32 halfHeight;

	const BYTE* pY;

	const BYTE* pU;

	const BYTE* pV;

	BYTE* pRGB = pDst;

	UINT32 nWidth, nHeight;

	UINT32 lastRow, lastCol;

	const DWORD formatSize = GetBytesPerPixel(DstFormat);

	fkt_writePixel writePixel = getPixelWriteFunction(DstFormat);

	pY = pSrc[0];

	pU = pSrc[1];

	pV = pSrc[2];

	lastCol = roi->width & 0x01;

	lastRow = roi->height & 0x01;

	nWidth = (roi->width + 1) & ~0x0001;

	nHeight = (roi->height + 1) & ~0x0001;

	halfWidth = nWidth / 2;

	halfHeight = nHeight / 2;

	srcPad[0] = (srcStep[0] - nWidth);

	srcPad[1] = (srcStep[1] - halfWidth);

	srcPad[2] = (srcStep[2] - halfWidth);

	dstPad = (dstStep - (nWidth * 4));

	for (y = 0; y < halfHeight;)

	{

		if (++y == halfHeight)

			lastRow <<= 1;

		for (x = 0; x < halfWidth;)

		{

			BYTE r;

			BYTE g;

			BYTE b;

			if (++x == halfWidth)

				lastCol <<= 1;

			U = *pU++;

			V = *pV++;

			/* 1st pixel */

			Y = *pY++;

			r = YUV2R(Y, U, V);

			g = YUV2G(Y, U, V);

			b = YUV2B(Y, U, V);

			pRGB = (*writePixel)(pRGB, formatSize, DstFormat, r, g, b, 0xFF);

			/* 2nd pixel */

			if (!(lastCol & 0x02))

			{

				Y = *pY++;

				r = YUV2R(Y, U, V);

				g = YUV2G(Y, U, V);

				b = YUV2B(Y, U, V);

				pRGB = (*writePixel)(pRGB, formatSize, DstFormat, r, g, b, 0xFF);

			}

			else

			{

				pY++;

				pRGB += formatSize;

				lastCol >>= 1;

			}

		}

		pY += srcPad[0];

		pU -= halfWidth;

		pV -= halfWidth;

		pRGB += dstPad;

		if (lastRow & 0x02)

			break;

		for (x = 0; x < halfWidth;)

		{

			BYTE r;

			BYTE g;

			BYTE b;

			if (++x == halfWidth)

				lastCol <<= 1;

			U = *pU++;

			V = *pV++;

			/* 3rd pixel */

			Y = *pY++;

			r = YUV2R(Y, U, V);

			g = YUV2G(Y, U, V);

			b = YUV2B(Y, U, V);

			pRGB = (*writePixel)(pRGB, formatSize, DstFormat, r, g, b, 0xFF);

			/* 4th pixel */

			if (!(lastCol & 0x02))

			{

				Y = *pY++;

				r = YUV2R(Y, U, V);

				g = YUV2G(Y, U, V);

				b = YUV2B(Y, U, V);

				pRGB = (*writePixel)(pRGB, formatSize, DstFormat, r, g, b, 0xFF);

			}

			else

			{

				pY++;

				pRGB += formatSize;

				lastCol >>= 1;

			}

		}

		pY += srcPad[0];

		pU += srcPad[1];

		pV += srcPad[2];

		pRGB += dstPad;

	}

	return PRIMITIVES_SUCCESS;

}

/**

 * | Y |    ( |  54   183     18 | | R | )        |  0  |

 * | U | =  ( | -29   -99    128 | | G | ) >> 8 + | 128 |

 * | V |    ( | 128  -116    -12 | | B | )        | 128 |

 */

static INLINE BYTE RGB2Y(BYTE R, BYTE G, BYTE B)

{

	return (54 * R + 183 * G + 18 * B) >> 8;

}

static INLINE BYTE RGB2U(BYTE R, BYTE G, BYTE B)

{

	return ((-29 * R - 99 * G + 128 * B) >> 8) + 128;

}

static INLINE BYTE RGB2V(INT32 R, INT32 G, INT32 B)

{

	return ((128L * R - 116 * G - 12 * B) >> 8) + 128;

}

static pstatus_t general_RGBToYUV444_8u_P3AC4R(const BYTE* pSrc, UINT32 SrcFormat,

                                               const UINT32 srcStep, BYTE* pDst[3],

                                               UINT32 dstStep[3], const prim_size_t* roi)

{

	const UINT32 bpp = GetBytesPerPixel(SrcFormat);

	UINT32 x, y;

	UINT32 nWidth, nHeight;

	nWidth = roi->width;

	nHeight = roi->height;

	for (y = 0; y < nHeight; y++)

	{

		const BYTE* pRGB = pSrc + y * srcStep;

		BYTE* pY = pDst[0] + y * dstStep[0];

		BYTE* pU = pDst[1] + y * dstStep[1];

		BYTE* pV = pDst[2] + y * dstStep[2];

		for (x = 0; x < nWidth; x++)

		{

			BYTE B, G, R;

			const UINT32 color = ReadColor(&pRGB[x * bpp], SrcFormat);

			SplitColor(color, SrcFormat, &R, &G, &B, NULL, NULL);

			pY[x] = RGB2Y(R, G, B);

			pU[x] = RGB2U(R, G, B);

			pV[x] = RGB2V(R, G, B);

		}

	}

	return PRIMITIVES_SUCCESS;

}

static INLINE pstatus_t general_RGBToYUV420_BGRX(const BYTE* pSrc, UINT32 srcStep, BYTE* pDst[3],

                                                 UINT32 dstStep[3], const prim_size_t* roi)

{

	UINT32 x, y, i;

	size_t x1 = 0, x2 = 4, x3 = srcStep, x4 = srcStep + 4;

	size_t y1 = 0, y2 = 1, y3 = dstStep[0], y4 = dstStep[0] + 1;

	UINT32 max_x = roi->width - 1;

	UINT32 max_y = roi->height - 1;

	for (y = i = 0; y < roi->height; y += 2, i++)

	{

		const BYTE* src = pSrc + y * srcStep;

		BYTE* ydst = pDst[0] + y * dstStep[0];

		BYTE* udst = pDst[1] + i * dstStep[1];

		BYTE* vdst = pDst[2] + i * dstStep[2];

		for (x = 0; x < roi->width; x += 2)

		{

			BYTE R, G, B;

			INT32 Ra, Ga, Ba;

			/* row 1, pixel 1 */

			Ba = B = *(src + x1 + 0);

			Ga = G = *(src + x1 + 1);

			Ra = R = *(src + x1 + 2);

			ydst[y1] = RGB2Y(R, G, B);

			if (x < max_x)

			{

				/* row 1, pixel 2 */

				Ba += B = *(src + x2 + 0);

				Ga += G = *(src + x2 + 1);

				Ra += R = *(src + x2 + 2);

				ydst[y2] = RGB2Y(R, G, B);

			}

			if (y < max_y)

			{

				/* row 2, pixel 1 */

				Ba += B = *(src + x3 + 0);

				Ga += G = *(src + x3 + 1);

				Ra += R = *(src + x3 + 2);

				ydst[y3] = RGB2Y(R, G, B);

				if (x < max_x)

				{

					/* row 2, pixel 2 */

					Ba += B = *(src + x4 + 0);

					Ga += G = *(src + x4 + 1);

					Ra += R = *(src + x4 + 2);

					ydst[y4] = RGB2Y(R, G, B);

				}

			}

			Ba >>= 2;

			Ga >>= 2;

			Ra >>= 2;

			*udst++ = RGB2U(Ra, Ga, Ba);

			*vdst++ = RGB2V(Ra, Ga, Ba);

			ydst += 2;

			src += 8;

		}

	}

	return PRIMITIVES_SUCCESS;

}

static INLINE pstatus_t general_RGBToYUV420_RGBX(const BYTE* pSrc, UINT32 srcStep, BYTE* pDst[3],

                                                 UINT32 dstStep[3], const prim_size_t* roi)

{

	UINT32 x, y, i;

	size_t x1 = 0, x2 = 4, x3 = srcStep, x4 = srcStep + 4;

	size_t y1 = 0, y2 = 1, y3 = dstStep[0], y4 = dstStep[0] + 1;

	UINT32 max_x = roi->width - 1;

	UINT32 max_y = roi->height - 1;

	for (y = i = 0; y < roi->height; y += 2, i++)

	{

		const BYTE* src = pSrc + y * srcStep;

		BYTE* ydst = pDst[0] + y * dstStep[0];

		BYTE* udst = pDst[1] + i * dstStep[1];

		BYTE* vdst = pDst[2] + i * dstStep[2];

		for (x = 0; x < roi->width; x += 2)

		{

			BYTE R, G, B;

			INT32 Ra, Ga, Ba;

			/* row 1, pixel 1 */

			Ra = R = *(src + x1 + 0);

			Ga = G = *(src + x1 + 1);

			Ba = B = *(src + x1 + 2);

			ydst[y1] = RGB2Y(R, G, B);

			if (x < max_x)

			{

				/* row 1, pixel 2 */

				Ra += R = *(src + x2 + 0);

				Ga += G = *(src + x2 + 1);

				Ba += B = *(src + x2 + 2);

				ydst[y2] = RGB2Y(R, G, B);

			}

			if (y < max_y)

			{

				/* row 2, pixel 1 */

				Ra += R = *(src + x3 + 0);

				Ga += G = *(src + x3 + 1);

				Ba += B = *(src + x3 + 2);

				ydst[y3] = RGB2Y(R, G, B);

				if (x < max_x)

				{

					/* row 2, pixel 2 */

					Ra += R = *(src + x4 + 0);

					Ga += G = *(src + x4 + 1);

					Ba += B = *(src + x4 + 2);

					ydst[y4] = RGB2Y(R, G, B);

				}

			}

			Ba >>= 2;

			Ga >>= 2;

			Ra >>= 2;

			*udst++ = RGB2U(Ra, Ga, Ba);

			*vdst++ = RGB2V(Ra, Ga, Ba);

			ydst += 2;

			src += 8;

		}

	}

	return PRIMITIVES_SUCCESS;

}

static INLINE pstatus_t general_RGBToYUV420_ANY(const BYTE* pSrc, UINT32 srcFormat, UINT32 srcStep,

                                                BYTE* pDst[3], UINT32 dstStep[3],

                                                const prim_size_t* roi)

{

	const UINT32 bpp = GetBytesPerPixel(srcFormat);

	UINT32 x, y, i;

	size_t x1 = 0, x2 = bpp, x3 = srcStep, x4 = srcStep + bpp;

	size_t y1 = 0, y2 = 1, y3 = dstStep[0], y4 = dstStep[0] + 1;

	UINT32 max_x = roi->width - 1;

	UINT32 max_y = roi->height - 1;

	for (y = i = 0; y < roi->height; y += 2, i++)

	{

		const BYTE* src = pSrc + y * srcStep;

		BYTE* ydst = pDst[0] + y * dstStep[0];

		BYTE* udst = pDst[1] + i * dstStep[1];

		BYTE* vdst = pDst[2] + i * dstStep[2];

		for (x = 0; x < roi->width; x += 2)

		{

			BYTE R, G, B;

			INT32 Ra, Ga, Ba;

			UINT32 color;

			/* row 1, pixel 1 */

			color = ReadColor(src + x1, srcFormat);

			SplitColor(color, srcFormat, &R, &G, &B, NULL, NULL);

			Ra = R;

			Ga = G;

			Ba = B;

			ydst[y1] = RGB2Y(R, G, B);

			if (x < max_x)

			{

				/* row 1, pixel 2 */

				color = ReadColor(src + x2, srcFormat);

				SplitColor(color, srcFormat, &R, &G, &B, NULL, NULL);

				Ra += R;

				Ga += G;

				Ba += B;

				ydst[y2] = RGB2Y(R, G, B);

			}

			if (y < max_y)

			{

				/* row 2, pixel 1 */

				color = ReadColor(src + x3, srcFormat);

				SplitColor(color, srcFormat, &R, &G, &B, NULL, NULL);

				Ra += R;

				Ga += G;

				Ba += B;

				ydst[y3] = RGB2Y(R, G, B);

				if (x < max_x)

				{

					/* row 2, pixel 2 */

					color = ReadColor(src + x4, srcFormat);

					SplitColor(color, srcFormat, &R, &G, &B, NULL, NULL);

					Ra += R;

					Ga += G;

					Ba += B;

					ydst[y4] = RGB2Y(R, G, B);

				}

			}

			Ra >>= 2;

			Ga >>= 2;

			Ba >>= 2;

			*udst++ = RGB2U(Ra, Ga, Ba);

			*vdst++ = RGB2V(Ra, Ga, Ba);

			ydst += 2;

			src += 2 * bpp;

		}

	}

	return PRIMITIVES_SUCCESS;

}

static pstatus_t general_RGBToYUV420_8u_P3AC4R(const BYTE* pSrc, UINT32 srcFormat, UINT32 srcStep,

                                               BYTE* pDst[3], UINT32 dstStep[3],

                                               const prim_size_t* roi)

{

	switch (srcFormat)

	{

		case PIXEL_FORMAT_BGRA32:

		case PIXEL_FORMAT_BGRX32:

			return general_RGBToYUV420_BGRX(pSrc, srcStep, pDst, dstStep, roi);

		case PIXEL_FORMAT_RGBA32:

		case PIXEL_FORMAT_RGBX32:

			return general_RGBToYUV420_RGBX(pSrc, srcStep, pDst, dstStep, roi);

		default:

			return general_RGBToYUV420_ANY(pSrc, srcFormat, srcStep, pDst, dstStep, roi);

	}

}

static INLINE void general_RGBToAVC444YUV_BGRX_DOUBLE_ROW(const BYTE* srcEven, const BYTE* srcOdd,

                                                          BYTE* b1Even, BYTE* b1Odd, BYTE* b2,

                                                          BYTE* b3, BYTE* b4, BYTE* b5, BYTE* b6,

                                                          BYTE* b7, UINT32 width)

{

	UINT32 x;

	for (x = 0; x < width; x += 2)

	{

		const BOOL lastX = (x + 1) >= width;

		BYTE Y1e, Y2e, U1e, V1e, U2e, V2e;