Source code
Revision control
Copy as Markdown
Other Tools
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/
/* 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,
#include "ImageToI420.h"
#include "ImageContainer.h"
#include "libyuv/convert.h"
#include "mozilla/dom/ImageBitmapBinding.h"
#include "mozilla/dom/ImageUtils.h"
#include "mozilla/gfx/Point.h"
#include "mozilla/RefPtr.h"
#include "mozilla/Result.h"
#include "nsThreadUtils.h"
using mozilla::ImageFormat;
using mozilla::dom::ImageBitmapFormat;
using mozilla::dom::ImageUtils;
using mozilla::gfx::DataSourceSurface;
using mozilla::gfx::SourceSurface;
using mozilla::gfx::SurfaceFormat;
using mozilla::layers::Image;
using mozilla::layers::PlanarYCbCrData;
using mozilla::layers::PlanarYCbCrImage;
static const PlanarYCbCrData* GetPlanarYCbCrData(Image* aImage) {
switch (aImage->GetFormat()) {
case ImageFormat::PLANAR_YCBCR:
return aImage->AsPlanarYCbCrImage()->GetData();
case ImageFormat::NV_IMAGE:
return aImage->AsNVImage()->GetData();
default:
return nullptr;
}
}
static already_AddRefed<SourceSurface> GetSourceSurface(Image* aImage) {
if (!aImage->AsGLImage() || NS_IsMainThread()) {
return aImage->GetAsSourceSurface();
}
// GLImage::GetAsSourceSurface() only supports main thread
RefPtr<SourceSurface> surf;
NS_DispatchAndSpinEventLoopUntilComplete(
"ImageToI420::GLImage::GetSourceSurface"_ns,
mozilla::GetMainThreadSerialEventTarget(),
NS_NewRunnableFunction(
"ImageToI420::GLImage::GetSourceSurface",
[&aImage, &surf]() { surf = aImage->GetAsSourceSurface(); }));
return surf.forget();
}
static nsresult MapRv(int aRv) {
// Docs for libyuv::ConvertToI420 say:
// Returns 0 for successful; -1 for invalid parameter. Non-zero for failure.
switch (aRv) {
case 0:
return NS_OK;
case -1:
return NS_ERROR_INVALID_ARG;
default:
return NS_ERROR_FAILURE;
}
}
namespace mozilla {
nsresult ConvertToI420(Image* aImage, uint8_t* aDestY, int aDestStrideY,
uint8_t* aDestU, int aDestStrideU, uint8_t* aDestV,
int aDestStrideV) {
if (!aImage->IsValid()) {
return NS_ERROR_INVALID_ARG;
}
if (const PlanarYCbCrData* data = GetPlanarYCbCrData(aImage)) {
const ImageUtils imageUtils(aImage);
Maybe<dom::ImageBitmapFormat> format = imageUtils.GetFormat();
if (format.isNothing()) {
MOZ_ASSERT_UNREACHABLE("YUV format conversion not implemented");
return NS_ERROR_NOT_IMPLEMENTED;
}
switch (format.value()) {
case ImageBitmapFormat::YUV420P:
return MapRv(libyuv::I420ToI420(
data->mYChannel, data->mYStride, data->mCbChannel,
data->mCbCrStride, data->mCrChannel, data->mCbCrStride, aDestY,
aDestStrideY, aDestU, aDestStrideU, aDestV, aDestStrideV,
aImage->GetSize().width, aImage->GetSize().height));
case ImageBitmapFormat::YUV422P:
return MapRv(libyuv::I422ToI420(
data->mYChannel, data->mYStride, data->mCbChannel,
data->mCbCrStride, data->mCrChannel, data->mCbCrStride, aDestY,
aDestStrideY, aDestU, aDestStrideU, aDestV, aDestStrideV,
aImage->GetSize().width, aImage->GetSize().height));
case ImageBitmapFormat::YUV444P:
return MapRv(libyuv::I444ToI420(
data->mYChannel, data->mYStride, data->mCbChannel,
data->mCbCrStride, data->mCrChannel, data->mCbCrStride, aDestY,
aDestStrideY, aDestU, aDestStrideU, aDestV, aDestStrideV,
aImage->GetSize().width, aImage->GetSize().height));
case ImageBitmapFormat::YUV420SP_NV12:
return MapRv(libyuv::NV12ToI420(
data->mYChannel, data->mYStride, data->mCbChannel,
data->mCbCrStride, aDestY, aDestStrideY, aDestU, aDestStrideU,
aDestV, aDestStrideV, aImage->GetSize().width,
aImage->GetSize().height));
case ImageBitmapFormat::YUV420SP_NV21:
return MapRv(libyuv::NV21ToI420(
data->mYChannel, data->mYStride, data->mCrChannel,
data->mCbCrStride, aDestY, aDestStrideY, aDestU, aDestStrideU,
aDestV, aDestStrideV, aImage->GetSize().width,
aImage->GetSize().height));
default:
MOZ_ASSERT_UNREACHABLE("YUV format conversion not implemented");
return NS_ERROR_NOT_IMPLEMENTED;
}
}
RefPtr<SourceSurface> surf = GetSourceSurface(aImage);
if (!surf) {
return NS_ERROR_FAILURE;
}
RefPtr<DataSourceSurface> data = surf->GetDataSurface();
if (!data) {
return NS_ERROR_FAILURE;
}
DataSourceSurface::ScopedMap map(data, DataSourceSurface::READ);
if (!map.IsMapped()) {
return NS_ERROR_FAILURE;
}
switch (surf->GetFormat()) {
case SurfaceFormat::B8G8R8A8:
case SurfaceFormat::B8G8R8X8:
return MapRv(libyuv::ARGBToI420(
static_cast<uint8_t*>(map.GetData()), map.GetStride(), aDestY,
aDestStrideY, aDestU, aDestStrideU, aDestV, aDestStrideV,
aImage->GetSize().width, aImage->GetSize().height));
case SurfaceFormat::R5G6B5_UINT16:
return MapRv(libyuv::RGB565ToI420(
static_cast<uint8_t*>(map.GetData()), map.GetStride(), aDestY,
aDestStrideY, aDestU, aDestStrideU, aDestV, aDestStrideV,
aImage->GetSize().width, aImage->GetSize().height));
default:
MOZ_ASSERT_UNREACHABLE("Surface format conversion not implemented");
return NS_ERROR_NOT_IMPLEMENTED;
}
}
} // namespace mozilla