VideoData* VideoData::Create(VideoInfo& aInfo, ImageContainer* aContainer, int64_t aOffset, int64_t aTime, int64_t aEndTime, const YCbCrBuffer& 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 situation should never happen unless there is a bug // in the decoder if (aBuffer.mPlanes[1].mWidth != aBuffer.mPlanes[2].mWidth || aBuffer.mPlanes[1].mHeight != aBuffer.mPlanes[2].mHeight) { NS_ERROR("C planes with different sizes"); return nullptr; } // The following situations could be triggered by invalid input if (aPicture.width <= 0 || aPicture.height <= 0) { NS_WARNING("Empty picture rect"); return nullptr; } if (!ValidatePlane(aBuffer.mPlanes[0]) || !ValidatePlane(aBuffer.mPlanes[1]) || !ValidatePlane(aBuffer.mPlanes[2])) { NS_WARNING("Invalid plane size"); 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() || xLimit.value() > aBuffer.mPlanes[0].mStride || !yLimit.isValid() || yLimit.value() > aBuffer.mPlanes[0].mHeight) { // 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)); const YCbCrBuffer::Plane &Y = aBuffer.mPlanes[0]; const YCbCrBuffer::Plane &Cb = aBuffer.mPlanes[1]; const YCbCrBuffer::Plane &Cr = aBuffer.mPlanes[2]; // Currently our decoder only knows how to output to PLANAR_YCBCR // format. ImageFormat format[2] = {PLANAR_YCBCR, GRALLOC_PLANAR_YCBCR}; if (IsYV12Format(Y, Cb, Cr)) { v->mImage = aContainer->CreateImage(format, 2); } else { v->mImage = aContainer->CreateImage(format, 1); } if (!v->mImage) { return nullptr; } NS_ASSERTION(v->mImage->GetFormat() == PLANAR_YCBCR || v->mImage->GetFormat() == GRALLOC_PLANAR_YCBCR, "Wrong format?"); PlanarYCbCrImage* videoImage = static_cast<PlanarYCbCrImage*>(v->mImage.get()); PlanarYCbCrImage::Data data; data.mYChannel = Y.mData + Y.mOffset; data.mYSize = gfxIntSize(Y.mWidth, Y.mHeight); data.mYStride = Y.mStride; data.mYSkip = Y.mSkip; data.mCbChannel = Cb.mData + Cb.mOffset; data.mCrChannel = Cr.mData + Cr.mOffset; data.mCbCrSize = gfxIntSize(Cb.mWidth, Cb.mHeight); data.mCbCrStride = Cb.mStride; data.mCbSkip = Cb.mSkip; data.mCrSkip = Cr.mSkip; data.mPicX = aPicture.x; data.mPicY = aPicture.y; data.mPicSize = gfxIntSize(aPicture.width, aPicture.height); data.mStereoMode = aInfo.mStereoMode; videoImage->SetDelayedConversion(true); videoImage->SetData(data); return v.forget(); }