зеркало из https://github.com/mozilla/gecko-dev.git
96 строки
3.1 KiB
C++
96 строки
3.1 KiB
C++
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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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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 "MacIOSurfaceHelpers.h"
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#include "mozilla/gfx/MacIOSurface.h"
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#include "YCbCrUtils.h"
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namespace mozilla {
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using namespace gfx;
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namespace layers {
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already_AddRefed<SourceSurface>
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CreateSourceSurfaceFromMacIOSurface(MacIOSurface* aSurface)
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{
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RefPtr<DataSourceSurface> dataSurface;
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aSurface->Lock();
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size_t bytesPerRow = aSurface->GetBytesPerRow();
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size_t ioWidth = aSurface->GetDevicePixelWidth();
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size_t ioHeight = aSurface->GetDevicePixelHeight();
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SurfaceFormat format = aSurface->GetFormat() == SurfaceFormat::NV12 ? SurfaceFormat::B8G8R8X8 : SurfaceFormat::B8G8R8A8;
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dataSurface = Factory::CreateDataSourceSurface(IntSize(ioWidth, ioHeight), format);
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if (NS_WARN_IF(!dataSurface)) {
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return nullptr;
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}
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DataSourceSurface::MappedSurface mappedSurface;
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if (!dataSurface->Map(DataSourceSurface::WRITE, &mappedSurface))
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return nullptr;
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if (aSurface->GetFormat() == SurfaceFormat::NV12) {
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if (aSurface->GetDevicePixelWidth() > PlanarYCbCrImage::MAX_DIMENSION ||
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aSurface->GetDevicePixelHeight() > PlanarYCbCrImage::MAX_DIMENSION) {
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return nullptr;
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}
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/* Extract and separate the CbCr planes */
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size_t cbCrStride = aSurface->GetBytesPerRow(1);
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size_t cbCrWidth = aSurface->GetDevicePixelWidth(1);
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size_t cbCrHeight = aSurface->GetDevicePixelHeight(1);
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auto cbPlane = MakeUnique<uint8_t[]>(cbCrWidth * cbCrHeight);
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auto crPlane = MakeUnique<uint8_t[]>(cbCrWidth * cbCrHeight);
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uint8_t* src = (uint8_t*)aSurface->GetBaseAddressOfPlane(1);
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uint8_t* cbDest = cbPlane.get();
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uint8_t* crDest = crPlane.get();
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for (size_t i = 0; i < cbCrHeight; i++) {
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uint8_t* rowSrc = src + cbCrStride * i;
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for (size_t j = 0; j < cbCrWidth; j++) {
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*cbDest = *rowSrc;
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cbDest++;
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rowSrc++;
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*crDest = *rowSrc;
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crDest++;
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rowSrc++;
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}
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}
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/* Convert to RGB */
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PlanarYCbCrData data;
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data.mYChannel = (uint8_t*)aSurface->GetBaseAddressOfPlane(0);
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data.mYStride = aSurface->GetBytesPerRow(0);
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data.mYSize = IntSize(aSurface->GetDevicePixelWidth(0), aSurface->GetDevicePixelHeight(0));
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data.mCbChannel = cbPlane.get();
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data.mCrChannel = crPlane.get();
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data.mCbCrStride = cbCrWidth;
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data.mCbCrSize = IntSize(cbCrWidth, cbCrHeight);
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data.mPicSize = data.mYSize;
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ConvertYCbCrToRGB(data, SurfaceFormat::B8G8R8X8, IntSize(ioWidth, ioHeight), mappedSurface.mData, mappedSurface.mStride);
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} else {
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unsigned char* ioData = (unsigned char*)aSurface->GetBaseAddress();
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for (size_t i = 0; i < ioHeight; ++i) {
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memcpy(mappedSurface.mData + i * mappedSurface.mStride,
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ioData + i * bytesPerRow,
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ioWidth * 4);
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}
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}
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dataSurface->Unmap();
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aSurface->Unlock();
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return dataSurface.forget();
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}
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} // namespace gfx
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} // namespace mozilla
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