318 lines
10 KiB
C++
318 lines
10 KiB
C++
/* -*- 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 "mozilla/layers/YCbCrImageDataSerializer.h"
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#include <string.h> // for memcpy
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#include "mozilla/gfx/2D.h" // for DataSourceSurface, Factory
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#include "mozilla/gfx/BaseSize.h" // for BaseSize
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#include "mozilla/gfx/Logging.h" // for gfxDebug
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#include "mozilla/gfx/Types.h"
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#include "mozilla/mozalloc.h" // for operator delete
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#include "nsDebug.h" // for NS_WARN_IF
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#include "yuv_convert.h" // for ConvertYCbCrToRGB32, etc
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#include "nsDebug.h"
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#define MOZ_ALIGN_WORD(x) (((x) + 3) & ~3)
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namespace mozilla {
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using namespace gfx;
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namespace layers {
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// The Data is layed out as follows:
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//
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// +-----------------+ -++ --+ --+ <-- Beginning of the buffer
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// | YCbCrBufferInfo | | | |
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// +-----------------+ --+ | |
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// | data | | | YCbCrBufferInfo->[mY/mCb/mCr]Offset
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// +-----------------+ ------+ |
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// | data | |
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// +-----------------+ ----------+
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// | data |
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// +-----------------+
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//
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// There can be padding between the blocks above to keep word alignment.
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// Structure written at the beginning og the data blob containing the image
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// (as shown in the figure above). It contains the necessary informations to
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// read the image in the blob.
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struct YCbCrBufferInfo
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{
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uint32_t mYOffset;
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uint32_t mCbOffset;
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uint32_t mCrOffset;
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uint32_t mYStride;
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uint32_t mYWidth;
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uint32_t mYHeight;
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uint32_t mCbCrStride;
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uint32_t mCbCrWidth;
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uint32_t mCbCrHeight;
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StereoMode mStereoMode;
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};
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static YCbCrBufferInfo* GetYCbCrBufferInfo(uint8_t* aData, size_t aDataSize)
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{
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return aDataSize >= sizeof(YCbCrBufferInfo)
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? reinterpret_cast<YCbCrBufferInfo*>(aData)
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: nullptr;
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}
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void YCbCrImageDataDeserializerBase::Validate()
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{
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mIsValid = false;
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if (!mData) {
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return;
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}
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YCbCrBufferInfo* info = GetYCbCrBufferInfo(mData, mDataSize);
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if (!info) {
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return;
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}
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size_t requiredSize = ComputeMinBufferSize(
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IntSize(info->mYWidth, info->mYHeight),
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info->mYStride,
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IntSize(info->mCbCrWidth, info->mCbCrHeight),
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info->mCbCrStride);
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mIsValid = requiredSize <= mDataSize;
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}
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uint8_t* YCbCrImageDataDeserializerBase::GetYData()
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{
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YCbCrBufferInfo* info = GetYCbCrBufferInfo(mData, mDataSize);
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return reinterpret_cast<uint8_t*>(info) + info->mYOffset;
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}
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uint8_t* YCbCrImageDataDeserializerBase::GetCbData()
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{
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YCbCrBufferInfo* info = GetYCbCrBufferInfo(mData, mDataSize);
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return reinterpret_cast<uint8_t*>(info) + info->mCbOffset;
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}
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uint8_t* YCbCrImageDataDeserializerBase::GetCrData()
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{
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YCbCrBufferInfo* info = GetYCbCrBufferInfo(mData, mDataSize);
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return reinterpret_cast<uint8_t*>(info) + info->mCrOffset;
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}
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uint8_t* YCbCrImageDataDeserializerBase::GetData()
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{
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YCbCrBufferInfo* info = GetYCbCrBufferInfo(mData, mDataSize);
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return (reinterpret_cast<uint8_t*>(info)) + MOZ_ALIGN_WORD(sizeof(YCbCrBufferInfo));
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}
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uint32_t YCbCrImageDataDeserializerBase::GetYStride()
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{
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YCbCrBufferInfo* info = GetYCbCrBufferInfo(mData, mDataSize);
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return info->mYStride;
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}
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uint32_t YCbCrImageDataDeserializerBase::GetCbCrStride()
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{
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YCbCrBufferInfo* info = GetYCbCrBufferInfo(mData, mDataSize);
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return info->mCbCrStride;
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}
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gfx::IntSize YCbCrImageDataDeserializerBase::GetYSize()
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{
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YCbCrBufferInfo* info = GetYCbCrBufferInfo(mData, mDataSize);
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return gfx::IntSize(info->mYWidth, info->mYHeight);
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}
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gfx::IntSize YCbCrImageDataDeserializerBase::GetCbCrSize()
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{
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YCbCrBufferInfo* info = GetYCbCrBufferInfo(mData, mDataSize);
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return gfx::IntSize(info->mCbCrWidth, info->mCbCrHeight);
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}
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StereoMode YCbCrImageDataDeserializerBase::GetStereoMode()
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{
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YCbCrBufferInfo* info = GetYCbCrBufferInfo(mData, mDataSize);
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return info->mStereoMode;
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}
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// Offset in bytes
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static size_t ComputeOffset(uint32_t aHeight, uint32_t aStride)
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{
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return MOZ_ALIGN_WORD(aHeight * aStride);
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}
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// Minimum required shmem size in bytes
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size_t
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YCbCrImageDataDeserializerBase::ComputeMinBufferSize(const gfx::IntSize& aYSize,
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uint32_t aYStride,
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const gfx::IntSize& aCbCrSize,
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uint32_t aCbCrStride)
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{
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MOZ_ASSERT(aYSize.height >= 0 && aYSize.width >= 0);
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if (aYSize.height < 0 || aYSize.width < 0 || aCbCrSize.height < 0 || aCbCrSize.width < 0) {
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gfxDebug() << "Non-positive YCbCr buffer size request " << aYSize.height << "x" << aYSize.width << ", " << aCbCrSize.height << "x" << aCbCrSize.width;
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return 0;
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}
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if (aYSize != IntSize() &&
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(!gfx::Factory::AllowedSurfaceSize(aYSize) ||
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aCbCrSize.width > aYSize.width ||
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aCbCrSize.height > aYSize.height)) {
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return 0;
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}
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return ComputeOffset(aYSize.height, aYStride)
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+ 2 * ComputeOffset(aCbCrSize.height, aCbCrStride)
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+ MOZ_ALIGN_WORD(sizeof(YCbCrBufferInfo));
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}
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// Minimum required shmem size in bytes
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size_t
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YCbCrImageDataDeserializerBase::ComputeMinBufferSize(const gfx::IntSize& aYSize,
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const gfx::IntSize& aCbCrSize)
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{
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return ComputeMinBufferSize(aYSize, aYSize.width, aCbCrSize, aCbCrSize.width);
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}
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// Offset in bytes
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static size_t ComputeOffset(uint32_t aSize)
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{
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return MOZ_ALIGN_WORD(aSize);
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}
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// Minimum required shmem size in bytes
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size_t
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YCbCrImageDataDeserializerBase::ComputeMinBufferSize(uint32_t aSize)
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{
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return ComputeOffset(aSize) + MOZ_ALIGN_WORD(sizeof(YCbCrBufferInfo));
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}
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void
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YCbCrImageDataSerializer::InitializeBufferInfo(uint32_t aYOffset,
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uint32_t aCbOffset,
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uint32_t aCrOffset,
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uint32_t aYStride,
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uint32_t aCbCrStride,
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const gfx::IntSize& aYSize,
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const gfx::IntSize& aCbCrSize,
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StereoMode aStereoMode)
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{
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YCbCrBufferInfo* info = GetYCbCrBufferInfo(mData, mDataSize);
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MOZ_ASSERT(info); // OK to assert here, this method is client-side-only
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uint32_t info_size = MOZ_ALIGN_WORD(sizeof(YCbCrBufferInfo));
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info->mYOffset = info_size + aYOffset;
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info->mCbOffset = info_size + aCbOffset;
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info->mCrOffset = info_size + aCrOffset;
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info->mYStride = aYStride;
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info->mYWidth = aYSize.width;
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info->mYHeight = aYSize.height;
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info->mCbCrStride = aCbCrStride;
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info->mCbCrWidth = aCbCrSize.width;
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info->mCbCrHeight = aCbCrSize.height;
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info->mStereoMode = aStereoMode;
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Validate();
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}
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void
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YCbCrImageDataSerializer::InitializeBufferInfo(uint32_t aYStride,
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uint32_t aCbCrStride,
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const gfx::IntSize& aYSize,
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const gfx::IntSize& aCbCrSize,
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StereoMode aStereoMode)
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{
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uint32_t yOffset = 0;
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uint32_t cbOffset = yOffset + MOZ_ALIGN_WORD(aYStride * aYSize.height);
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uint32_t crOffset = cbOffset + MOZ_ALIGN_WORD(aCbCrStride * aCbCrSize.height);
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return InitializeBufferInfo(yOffset, cbOffset, crOffset,
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aYStride, aCbCrStride, aYSize, aCbCrSize, aStereoMode);
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}
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void
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YCbCrImageDataSerializer::InitializeBufferInfo(const gfx::IntSize& aYSize,
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const gfx::IntSize& aCbCrSize,
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StereoMode aStereoMode)
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{
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return InitializeBufferInfo(aYSize.width, aCbCrSize.width, aYSize, aCbCrSize, aStereoMode);
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}
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static void CopyLineWithSkip(const uint8_t* src, uint8_t* dst, uint32_t len, uint32_t skip) {
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for (uint32_t i = 0; i < len; ++i) {
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*dst = *src;
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src += 1 + skip;
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++dst;
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}
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}
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bool
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YCbCrImageDataSerializer::CopyData(const uint8_t* aYData,
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const uint8_t* aCbData, const uint8_t* aCrData,
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gfx::IntSize aYSize, uint32_t aYStride,
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gfx::IntSize aCbCrSize, uint32_t aCbCrStride,
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uint32_t aYSkip, uint32_t aCbCrSkip)
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{
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if (!IsValid() || GetYSize() != aYSize || GetCbCrSize() != aCbCrSize) {
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return false;
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}
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for (int i = 0; i < aYSize.height; ++i) {
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if (aYSkip == 0) {
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// fast path
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memcpy(GetYData() + i * GetYStride(),
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aYData + i * aYStride,
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aYSize.width);
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} else {
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// slower path
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CopyLineWithSkip(aYData + i * aYStride,
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GetYData() + i * GetYStride(),
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aYSize.width, aYSkip);
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}
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}
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for (int i = 0; i < aCbCrSize.height; ++i) {
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if (aCbCrSkip == 0) {
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// fast path
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memcpy(GetCbData() + i * GetCbCrStride(),
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aCbData + i * aCbCrStride,
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aCbCrSize.width);
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memcpy(GetCrData() + i * GetCbCrStride(),
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aCrData + i * aCbCrStride,
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aCbCrSize.width);
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} else {
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// slower path
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CopyLineWithSkip(aCbData + i * aCbCrStride,
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GetCbData() + i * GetCbCrStride(),
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aCbCrSize.width, aCbCrSkip);
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CopyLineWithSkip(aCrData + i * aCbCrStride,
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GetCrData() + i * GetCbCrStride(),
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aCbCrSize.width, aCbCrSkip);
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}
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}
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return true;
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}
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already_AddRefed<DataSourceSurface>
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YCbCrImageDataDeserializer::ToDataSourceSurface()
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{
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RefPtr<DataSourceSurface> result =
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Factory::CreateDataSourceSurface(GetYSize(), gfx::SurfaceFormat::B8G8R8X8);
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if (NS_WARN_IF(!result)) {
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return nullptr;
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}
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DataSourceSurface::MappedSurface map;
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if (NS_WARN_IF(!result->Map(DataSourceSurface::MapType::WRITE, &map))) {
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return nullptr;
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}
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gfx::YUVType type = TypeFromSize(GetYSize().width, GetYSize().height,
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GetCbCrSize().width, GetCbCrSize().height);
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gfx::ConvertYCbCrToRGB32(GetYData(), GetCbData(), GetCrData(),
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map.mData,
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0, 0, //pic x and y
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GetYSize().width, GetYSize().height,
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GetYStride(), GetCbCrStride(),
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map.mStride, type);
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result->Unmap();
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return result.forget();
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}
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} // namespace layers
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} // namespace mozilla
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