1 /* 2 * Copyright (C) 2010 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 32 #ifndef VideoLayerChromium_h 33 #define VideoLayerChromium_h 34 35 #if USE(ACCELERATED_COMPOSITING) 36 37 #include "LayerChromium.h" 38 #include "VideoFrameProvider.h" 39 40 namespace WebCore { 41 42 // A Layer that contains a Video element. 43 class VideoLayerChromium : public LayerChromium { 44 public: 45 struct Texture { 46 unsigned id; 47 IntSize size; 48 IntSize visibleSize; 49 bool ownedByLayerRenderer; 50 bool isEmpty; 51 }; 52 53 static PassRefPtr<VideoLayerChromium> create(GraphicsLayerChromium* owner = 0, 54 VideoFrameProvider* = 0); 55 virtual ~VideoLayerChromium(); 56 57 virtual PassRefPtr<CCLayerImpl> createCCLayerImpl(); 58 59 virtual void updateCompositorResources(); drawsContent()60 virtual bool drawsContent() const { return true; } 61 62 // This function is called by VideoFrameProvider. When this method is called 63 // putCurrentFrame() must be called to return the frame currently held. 64 void releaseCurrentFrame(); 65 66 virtual void pushPropertiesTo(CCLayerImpl*); 67 68 protected: 69 virtual void cleanupResources(); layerTypeAsString()70 virtual const char* layerTypeAsString() const { return "VideoLayer"; } 71 72 private: 73 VideoLayerChromium(GraphicsLayerChromium* owner, VideoFrameProvider*); 74 75 static unsigned determineTextureFormat(const VideoFrameChromium*); 76 static IntSize computeVisibleSize(const VideoFrameChromium*, unsigned plane); 77 void deleteTexturesInUse(); 78 79 bool allocateTexturesIfNeeded(GraphicsContext3D*, const VideoFrameChromium*, unsigned textureFormat); 80 void allocateTexture(GraphicsContext3D*, unsigned textureId, const IntSize& dimensions, unsigned textureFormat) const; 81 82 void updateTexture(GraphicsContext3D*, unsigned textureId, const IntSize& dimensions, unsigned textureFormat, const void* data) const; 83 84 void resetFrameParameters(); 85 void saveCurrentFrame(VideoFrameChromium*); 86 87 bool m_skipsDraw; 88 VideoFrameChromium::Format m_frameFormat; 89 VideoFrameProvider* m_provider; 90 91 Texture m_textures[3]; 92 93 // This will be null for the entire duration of video playback if hardware 94 // decoding is not being used. 95 VideoFrameChromium* m_currentFrame; 96 }; 97 98 } 99 #endif // USE(ACCELERATED_COMPOSITING) 100 101 #endif 102