gecko/dom/media/VideoSegment.cpp

113 lines
2.9 KiB
C++

/* -*- 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 "VideoSegment.h"
#include "gfx2DGlue.h"
#include "ImageContainer.h"
#include "Layers.h"
namespace mozilla {
using namespace layers;
VideoFrame::VideoFrame(already_AddRefed<Image>& aImage,
const gfxIntSize& aIntrinsicSize)
: mImage(aImage), mIntrinsicSize(aIntrinsicSize), mForceBlack(false)
{}
VideoFrame::VideoFrame()
: mIntrinsicSize(0, 0), mForceBlack(false)
{}
VideoFrame::~VideoFrame()
{}
void
VideoFrame::SetNull() {
mImage = nullptr;
mIntrinsicSize = gfxIntSize(0, 0);
}
void
VideoFrame::TakeFrom(VideoFrame* aFrame)
{
mImage = aFrame->mImage.forget();
mIntrinsicSize = aFrame->mIntrinsicSize;
mForceBlack = aFrame->GetForceBlack();
}
/* static */ already_AddRefed<Image>
VideoFrame::CreateBlackImage(const gfxIntSize& aSize)
{
nsRefPtr<ImageContainer> container;
nsRefPtr<Image> image;
container = LayerManager::CreateImageContainer();
image = container->CreateImage(ImageFormat::PLANAR_YCBCR);
if (!image) {
MOZ_ASSERT(false);
return nullptr;
}
int len = ((aSize.width * aSize.height) * 3 / 2);
PlanarYCbCrImage* planar = static_cast<PlanarYCbCrImage*>(image.get());
// Generate a black image.
ScopedDeletePtr<uint8_t> frame(new uint8_t[len]);
int y = aSize.width * aSize.height;
// Fill Y plane.
memset(frame.rwget(), 0x10, y);
// Fill Cb/Cr planes.
memset(frame.rwget() + y, 0x80, (len - y));
const uint8_t lumaBpp = 8;
const uint8_t chromaBpp = 4;
layers::PlanarYCbCrData data;
data.mYChannel = frame.rwget();
data.mYSize = gfx::IntSize(aSize.width, aSize.height);
data.mYStride = (int32_t) (aSize.width * lumaBpp / 8.0);
data.mCbCrStride = (int32_t) (aSize.width * chromaBpp / 8.0);
data.mCbChannel = frame.rwget() + aSize.height * data.mYStride;
data.mCrChannel = data.mCbChannel + aSize.height * data.mCbCrStride / 2;
data.mCbCrSize = gfx::IntSize(aSize.width / 2, aSize.height / 2);
data.mPicX = 0;
data.mPicY = 0;
data.mPicSize = gfx::IntSize(aSize.width, aSize.height);
data.mStereoMode = StereoMode::MONO;
// SetData copies data, so we can free data.
planar->SetData(data);
return image.forget();
}
VideoChunk::VideoChunk()
{}
VideoChunk::~VideoChunk()
{}
void
VideoSegment::AppendFrame(already_AddRefed<Image>&& aImage,
StreamTime aDuration,
const IntSize& aIntrinsicSize,
bool aForceBlack)
{
VideoChunk* chunk = AppendChunk(aDuration);
VideoFrame frame(aImage, ThebesIntSize(aIntrinsicSize));
frame.SetForceBlack(aForceBlack);
chunk->mFrame.TakeFrom(&frame);
}
VideoSegment::VideoSegment()
: MediaSegmentBase<VideoSegment, VideoChunk>(VIDEO)
{}
VideoSegment::~VideoSegment()
{}
}