static void
GonkFrameBuilder(Image* aImage, void* aBuffer, uint32_t aWidth, uint32_t aHeight)
{
/**
* Cast the generic Image back to our platform-specific type and
* populate it.
*/
GonkIOSurfaceImage* videoImage = static_cast<GonkIOSurfaceImage*>(aImage);
GonkIOSurfaceImage::Data data;
data.mGraphicBuffer = static_cast<layers::GraphicBufferLocked*>(aBuffer);
data.mPicSize = gfxIntSize(aWidth, aHeight);
videoImage->SetData(data);
}
VideoData* VideoData::Create(VideoInfo& aInfo,
ImageContainer* aContainer,
int64_t aOffset,
int64_t aTime,
int64_t aEndTime,
mozilla::layers::GraphicBufferLocked *aBuffer,
bool aKeyframe,
int64_t aTimecode,
nsIntRect aPicture)
{
if (!aContainer) {
// Create a dummy VideoData with no image. This gives us something to
// send to media streams if necessary.
nsAutoPtr<VideoData> v(new VideoData(aOffset,
aTime,
aEndTime,
aKeyframe,
aTimecode,
aInfo.mDisplay));
return v.forget();
}
// The following situations could be triggered by invalid input
if (aPicture.width <= 0 || aPicture.height <= 0) {
NS_WARNING("Empty picture rect");
return nullptr;
}
// Ensure the picture size specified in the headers can be extracted out of
// the frame we've been supplied without indexing out of bounds.
CheckedUint32 xLimit = aPicture.x + CheckedUint32(aPicture.width);
CheckedUint32 yLimit = aPicture.y + CheckedUint32(aPicture.height);
if (!xLimit.isValid() || !yLimit.isValid())
{
// The specified picture dimensions can't be contained inside the video
// frame, we'll stomp memory if we try to copy it. Fail.
NS_WARNING("Overflowing picture rect");
return nullptr;
}
nsAutoPtr<VideoData> v(new VideoData(aOffset,
aTime,
aEndTime,
aKeyframe,
aTimecode,
aInfo.mDisplay));
ImageFormat format = GONK_IO_SURFACE;
v->mImage = aContainer->CreateImage(&format, 1);
if (!v->mImage) {
return nullptr;
}
NS_ASSERTION(v->mImage->GetFormat() == GONK_IO_SURFACE,
"Wrong format?");
typedef mozilla::layers::GonkIOSurfaceImage GonkIOSurfaceImage;
GonkIOSurfaceImage* videoImage = static_cast<GonkIOSurfaceImage*>(v->mImage.get());
GonkIOSurfaceImage::Data data;
data.mPicSize = gfxIntSize(aPicture.width, aPicture.height);
data.mGraphicBuffer = aBuffer;
videoImage->SetData(data);
return v.forget();
}