зеркало из https://github.com/mozilla/gecko-dev.git
262 строки
9.5 KiB
C++
262 строки
9.5 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "gfx2DGlue.h"
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#include "YCbCrUtils.h"
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#include "yuv_convert.h"
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#include "ycbcr_to_rgb565.h"
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namespace mozilla {
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namespace gfx {
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void
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GetYCbCrToRGBDestFormatAndSize(const layers::PlanarYCbCrData& aData,
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SurfaceFormat& aSuggestedFormat,
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IntSize& aSuggestedSize)
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{
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YUVType yuvtype =
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TypeFromSize(aData.mYSize.width,
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aData.mYSize.height,
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aData.mCbCrSize.width,
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aData.mCbCrSize.height);
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// 'prescale' is true if the scaling is to be done as part of the
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// YCbCr to RGB conversion rather than on the RGB data when rendered.
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bool prescale = aSuggestedSize.width > 0 && aSuggestedSize.height > 0 &&
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aSuggestedSize != aData.mPicSize;
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if (aSuggestedFormat == SurfaceFormat::R5G6B5_UINT16) {
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#if defined(HAVE_YCBCR_TO_RGB565)
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if (prescale &&
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!IsScaleYCbCrToRGB565Fast(aData.mPicX,
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aData.mPicY,
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aData.mPicSize.width,
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aData.mPicSize.height,
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aSuggestedSize.width,
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aSuggestedSize.height,
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yuvtype,
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FILTER_BILINEAR) &&
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IsConvertYCbCrToRGB565Fast(aData.mPicX,
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aData.mPicY,
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aData.mPicSize.width,
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aData.mPicSize.height,
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yuvtype)) {
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prescale = false;
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}
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#else
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// yuv2rgb16 function not available
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aSuggestedFormat = SurfaceFormat::B8G8R8X8;
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#endif
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}
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else if (aSuggestedFormat != SurfaceFormat::B8G8R8X8) {
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// No other formats are currently supported.
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aSuggestedFormat = SurfaceFormat::B8G8R8X8;
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}
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if (aSuggestedFormat == SurfaceFormat::B8G8R8X8) {
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/* ScaleYCbCrToRGB32 does not support a picture offset, nor 4:4:4 data.
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See bugs 639415 and 640073. */
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if (aData.mPicX != 0 || aData.mPicY != 0 || yuvtype == YV24)
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prescale = false;
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}
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if (!prescale) {
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aSuggestedSize = aData.mPicSize;
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}
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}
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static inline void
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ConvertYCbCr16to8Line(uint8_t* aDst,
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int aStride,
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const uint16_t* aSrc,
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int aStride16,
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int aWidth,
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int aHeight,
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int aBitDepth)
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{
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uint16_t mask = (1 << aBitDepth) - 1;
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for (int i = 0; i < aHeight; i++) {
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for (int j = 0; j < aWidth; j++) {
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uint16_t val = (aSrc[j] & mask) >> (aBitDepth - 8);
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aDst[j] = val;
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}
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aDst += aStride;
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aSrc += aStride16;
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}
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}
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void
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ConvertYCbCrToRGB(const layers::PlanarYCbCrData& aData,
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const SurfaceFormat& aDestFormat,
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const IntSize& aDestSize,
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unsigned char* aDestBuffer,
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int32_t aStride)
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{
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// ConvertYCbCrToRGB et al. assume the chroma planes are rounded up if the
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// luma plane is odd sized.
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MOZ_ASSERT((aData.mCbCrSize.width == aData.mYSize.width ||
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aData.mCbCrSize.width == (aData.mYSize.width + 1) >> 1) &&
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(aData.mCbCrSize.height == aData.mYSize.height ||
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aData.mCbCrSize.height == (aData.mYSize.height + 1) >> 1));
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// Used if converting to 8 bits YUV.
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UniquePtr<uint8_t[]> yChannel;
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UniquePtr<uint8_t[]> cbChannel;
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UniquePtr<uint8_t[]> crChannel;
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layers::PlanarYCbCrData dstData;
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const layers::PlanarYCbCrData& srcData = aData.mBitDepth == 8 ? aData : dstData;
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if (aData.mBitDepth != 8) {
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MOZ_ASSERT(aData.mBitDepth > 8 && aData.mBitDepth <= 16);
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// Convert to 8 bits data first.
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dstData.mPicSize = aData.mPicSize;
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dstData.mPicX = aData.mPicX;
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dstData.mPicY = aData.mPicY;
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dstData.mYSize = aData.mYSize;
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// We align the destination stride to 32 bytes, so that libyuv can use
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// SSE optimised code.
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dstData.mYStride = (aData.mYSize.width + 31) & ~31;
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dstData.mCbCrSize = aData.mCbCrSize;
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dstData.mCbCrStride = (aData.mCbCrSize.width + 31) & ~31;
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dstData.mYUVColorSpace = aData.mYUVColorSpace;
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dstData.mBitDepth = 8;
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size_t ySize = GetAlignedStride<1>(dstData.mYStride, aData.mYSize.height);
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size_t cbcrSize =
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GetAlignedStride<1>(dstData.mCbCrStride, aData.mCbCrSize.height);
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if (ySize == 0 || cbcrSize == 0) {
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return;
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}
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yChannel = MakeUnique<uint8_t[]>(ySize);
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cbChannel = MakeUnique<uint8_t[]>(cbcrSize);
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crChannel = MakeUnique<uint8_t[]>(cbcrSize);
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dstData.mYChannel = yChannel.get();
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dstData.mCbChannel = cbChannel.get();
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dstData.mCrChannel = crChannel.get();
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ConvertYCbCr16to8Line(dstData.mYChannel,
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dstData.mYStride,
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reinterpret_cast<uint16_t*>(aData.mYChannel),
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aData.mYStride / 2,
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aData.mYSize.width,
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aData.mYSize.height,
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aData.mBitDepth);
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ConvertYCbCr16to8Line(dstData.mCbChannel,
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dstData.mCbCrStride,
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reinterpret_cast<uint16_t*>(aData.mCbChannel),
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aData.mCbCrStride / 2,
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aData.mCbCrSize.width,
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aData.mCbCrSize.height,
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aData.mBitDepth);
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ConvertYCbCr16to8Line(dstData.mCrChannel,
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dstData.mCbCrStride,
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reinterpret_cast<uint16_t*>(aData.mCrChannel),
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aData.mCbCrStride / 2,
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aData.mCbCrSize.width,
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aData.mCbCrSize.height,
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aData.mBitDepth);
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}
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YUVType yuvtype =
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TypeFromSize(srcData.mYSize.width,
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srcData.mYSize.height,
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srcData.mCbCrSize.width,
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srcData.mCbCrSize.height);
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// Convert from YCbCr to RGB now, scaling the image if needed.
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if (aDestSize != srcData.mPicSize) {
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#if defined(HAVE_YCBCR_TO_RGB565)
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if (aDestFormat == SurfaceFormat::R5G6B5_UINT16) {
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ScaleYCbCrToRGB565(srcData.mYChannel,
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srcData.mCbChannel,
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srcData.mCrChannel,
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aDestBuffer,
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srcData.mPicX,
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srcData.mPicY,
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srcData.mPicSize.width,
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srcData.mPicSize.height,
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aDestSize.width,
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aDestSize.height,
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srcData.mYStride,
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srcData.mCbCrStride,
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aStride,
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yuvtype,
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FILTER_BILINEAR);
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} else
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#endif
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ScaleYCbCrToRGB32(srcData.mYChannel, //
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srcData.mCbChannel,
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srcData.mCrChannel,
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aDestBuffer,
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srcData.mPicSize.width,
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srcData.mPicSize.height,
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aDestSize.width,
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aDestSize.height,
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srcData.mYStride,
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srcData.mCbCrStride,
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aStride,
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yuvtype,
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srcData.mYUVColorSpace,
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FILTER_BILINEAR);
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} else { // no prescale
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#if defined(HAVE_YCBCR_TO_RGB565)
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if (aDestFormat == SurfaceFormat::R5G6B5_UINT16) {
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ConvertYCbCrToRGB565(srcData.mYChannel,
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srcData.mCbChannel,
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srcData.mCrChannel,
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aDestBuffer,
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srcData.mPicX,
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srcData.mPicY,
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srcData.mPicSize.width,
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srcData.mPicSize.height,
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srcData.mYStride,
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srcData.mCbCrStride,
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aStride,
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yuvtype);
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} else // aDestFormat != SurfaceFormat::R5G6B5_UINT16
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#endif
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ConvertYCbCrToRGB32(srcData.mYChannel, //
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srcData.mCbChannel,
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srcData.mCrChannel,
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aDestBuffer,
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srcData.mPicX,
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srcData.mPicY,
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srcData.mPicSize.width,
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srcData.mPicSize.height,
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srcData.mYStride,
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srcData.mCbCrStride,
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aStride,
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yuvtype,
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srcData.mYUVColorSpace);
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}
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}
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void
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ConvertYCbCrAToARGB(const uint8_t* aSrcY,
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const uint8_t* aSrcU,
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const uint8_t* aSrcV,
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const uint8_t* aSrcA,
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int aSrcStrideYA, int aSrcStrideUV,
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uint8_t* aDstARGB, int aDstStrideARGB,
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int aWidth, int aHeight) {
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ConvertYCbCrAToARGB32(aSrcY,
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aSrcU,
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aSrcV,
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aSrcA,
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aDstARGB,
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aWidth,
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aHeight,
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aSrcStrideYA,
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aSrcStrideUV,
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aDstStrideARGB);
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}
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} // namespace gfx
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} // namespace mozilla
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