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-rw-r--r--dom/media/ImageToI420.cpp148
1 files changed, 148 insertions, 0 deletions
diff --git a/dom/media/ImageToI420.cpp b/dom/media/ImageToI420.cpp
new file mode 100644
index 0000000000..8fc5198b4a
--- /dev/null
+++ b/dom/media/ImageToI420.cpp
@@ -0,0 +1,148 @@
+/* -*- 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,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#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 "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);
+ switch (imageUtils.GetFormat()) {
+ 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