1 /* 2 * Copyright 2011 The Android Open Source Project 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * * Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * * Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef VideoLayerManager_h 27 #define VideoLayerManager_h 28 29 #include "GLUtils.h" 30 #include <wtf/HashMap.h> 31 #include <wtf/Vector.h> 32 33 #if USE(ACCELERATED_COMPOSITING) 34 35 namespace WebCore { 36 37 // Every video layer can use its uniqueId to query VideoLayerManager about such 38 // info globally. 39 struct VideoLayerInfo { 40 GLuint textureId; // GL texture bound with the surface texture. 41 int videoSize; // The size of the video. 42 int timeStamp; // Used to decide which VideoLayerInfo is the oldest one. 43 GLfloat surfaceMatrix[16]; 44 }; 45 46 47 class VideoLayerManager { 48 49 public: 50 typedef HashMap<int, VideoLayerInfo*>::const_iterator InfoIterator; 51 52 VideoLayerManager(); 53 54 // Register the texture when we got setSurfaceTexture call. 55 void registerTexture(const int layerId, const GLuint textureId); 56 // Update the size when the video is prepared. 57 void updateVideoLayerSize(const int layerId, const int size); 58 // At draw time, update the matrix for every video frame update. 59 void updateMatrix(const int layerId, const GLfloat* matrix); 60 // Remove the layer info from the mapping. 61 void removeLayer(const int layerId); 62 63 // Return the texture name corresponding to the layerId 64 GLuint getTextureId(const int layerId); 65 // Return the matrix for surface texture corresponding to the layerId 66 GLfloat* getMatrix(const int layerId); 67 68 // Delete the GL textures 69 void deleteUnusedTextures(); 70 71 private: 72 // Get the sum of all the video size stored in m_videoLayerInfoMap. 73 int getTotalMemUsage(); 74 // If the memory consumption is out of bound, recycle some textures. 75 bool recycleTextureMem(); 76 // The private function to remove layer. 77 void removeLayerInternal(const int layerId); 78 79 // Indexed by each layer's uniqueId, this map contains the important info 80 // used for showing the video when playing or the screenshot when paused. 81 HashMap<int, VideoLayerInfo*> m_videoLayerInfoMap; 82 android::Mutex m_videoLayerInfoMapLock; 83 84 // Everytime we add one item to the map, we update the timestamp. 85 int m_currentTimeStamp; 86 87 // The retiredTextures is used to communicate between UI thread and webcore 88 // thread. Basically, GL textures are determined to retire in the webcore 89 // thread, and really get deleted in the UI thread. 90 Vector<GLuint> m_retiredTextures; 91 android::Mutex m_retiredTexturesLock; 92 }; 93 94 } // namespace WebCore 95 96 #endif // USE(ACCELERATED_COMPOSITING) 97 // 98 #endif // VideoLayerManager_h 99