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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "MacIOSurfaceHelpers.h"
#include "MacIOSurfaceImage.h"
#include "gfxPlatform.h"
#include "mozilla/layers/CompositableClient.h"
#include "mozilla/layers/CompositableForwarder.h"
#include "mozilla/layers/MacIOSurfaceTextureClientOGL.h"
#include "mozilla/layers/TextureForwarder.h"
#include "mozilla/StaticPrefs_layers.h"
#include "mozilla/UniquePtr.h"
#include "YCbCrUtils.h"
using namespace mozilla::layers;
using namespace mozilla::gfx;
TextureClient* MacIOSurfaceImage::GetTextureClient(
KnowsCompositor* aKnowsCompositor) {
if (!mTextureClient) {
BackendType backend = BackendType::NONE;
mTextureClient = TextureClient::CreateWithData(
MacIOSurfaceTextureData::Create(mSurface, backend),
TextureFlags::DEFAULT, aKnowsCompositor->GetTextureForwarder());
}
return mTextureClient;
}
already_AddRefed<SourceSurface> MacIOSurfaceImage::GetAsSourceSurface() {
return CreateSourceSurfaceFromMacIOSurface(mSurface);
}
bool MacIOSurfaceImage::SetData(ImageContainer* aContainer,
const PlanarYCbCrData& aData) {
MOZ_ASSERT(!mSurface);
if (aData.mYSkip != 0 || aData.mCbSkip != 0 || aData.mCrSkip != 0 ||
!(aData.mYUVColorSpace == YUVColorSpace::BT601 ||
aData.mYUVColorSpace == YUVColorSpace::BT709) ||
!(aData.mColorRange == ColorRange::FULL ||
aData.mColorRange == ColorRange::LIMITED) ||
aData.mColorDepth != ColorDepth::COLOR_8) {
return false;
}
if (aData.mCbCrSize.width * 2 != aData.mYSize.width) {
return false;
}
// We can only support 4:2:2 and 4:2:0 formats currently.
if (aData.mCbCrSize.height != aData.mYSize.height &&
aData.mCbCrSize.height * 2 != aData.mYSize.height) {
return false;
}
RefPtr<MacIOSurfaceRecycleAllocator> allocator =
aContainer->GetMacIOSurfaceRecycleAllocator();
RefPtr<MacIOSurface> surf = allocator->Allocate(
aData.mYSize, aData.mCbCrSize, aData.mYUVColorSpace, aData.mColorRange);
surf->Lock(false);
// If the CbCrSize's height is half of the YSize's height, then we'll
// need to duplicate the CbCr data on every second row.
size_t heightScale = aData.mYSize.height / aData.mCbCrSize.height;
MOZ_ASSERT(surf->GetFormat() == SurfaceFormat::YUV422);
// The underlying IOSurface has format kCVPixelFormatType_422YpCbCr8FullRange
// or kCVPixelFormatType_422YpCbCr8_yuvs, which uses a 4:2:2 Y`0 Cb Y`1 Cr
// layout. See CVPixelBuffer.h for the full list of format descriptions.
MOZ_ASSERT(aData.mYSize.height > 0);
uint8_t* dst = (uint8_t*)surf->GetBaseAddressOfPlane(0);
size_t stride = surf->GetBytesPerRow(0);
for (size_t i = 0; i < (size_t)aData.mYSize.height; i++) {
// Compute the row addresses. If the input was 4:2:0, then
// we divide i by 2, so that each source row of CbCr maps to
// two dest rows.
uint8_t* rowYSrc = aData.mYChannel + aData.mYStride * i;
uint8_t* rowCbSrc =
aData.mCbChannel + aData.mCbCrStride * (i / heightScale);
uint8_t* rowCrSrc =
aData.mCrChannel + aData.mCbCrStride * (i / heightScale);
uint8_t* rowDst = dst + stride * i;
// Iterate across the CbCr width (which we have guaranteed to be half of
// the surface width), and write two 16bit pixels each time.
for (size_t j = 0; j < (size_t)aData.mCbCrSize.width; j++) {
*rowDst = *rowYSrc;
rowDst++;
rowYSrc++;
*rowDst = *rowCbSrc;
rowDst++;
rowCbSrc++;
*rowDst = *rowYSrc;
rowDst++;
rowYSrc++;
*rowDst = *rowCrSrc;
rowDst++;
rowCrSrc++;
}
}
surf->Unlock(false);
mSurface = surf;
mPictureRect = aData.GetPictureRect();
return true;
}
already_AddRefed<MacIOSurface> MacIOSurfaceRecycleAllocator::Allocate(
const gfx::IntSize aYSize, const gfx::IntSize& aCbCrSize,
gfx::YUVColorSpace aYUVColorSpace, gfx::ColorRange aColorRange) {
nsTArray<CFTypeRefPtr<IOSurfaceRef>> surfaces = std::move(mSurfaces);
RefPtr<MacIOSurface> result;
for (auto& surf : surfaces) {
// If the surface size has changed, then discard any surfaces of the old
// size.
if (::IOSurfaceGetWidthOfPlane(surf.get(), 0) != (size_t)aYSize.width ||
::IOSurfaceGetHeightOfPlane(surf.get(), 0) != (size_t)aYSize.height) {
continue;
}
// Only construct a MacIOSurface object when we find one that isn't
// in-use, since the constructor adds a usage ref.
if (!result && !::IOSurfaceIsInUse(surf.get())) {
result = new MacIOSurface(surf, 1.0, false, aYUVColorSpace);
}
mSurfaces.AppendElement(surf);
}
if (!result) {
result =
MacIOSurface::CreateYUV422Surface(aYSize, aYUVColorSpace, aColorRange);
if (mSurfaces.Length() <
StaticPrefs::layers_iosurfaceimage_recycle_limit()) {
mSurfaces.AppendElement(result->GetIOSurfaceRef());
}
}
return result.forget();
}
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