cc/CCVideoLayerImpl.h

   1 // Copyright 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CCVideoLayerImpl_h
   6 #define CCVideoLayerImpl_h
   7
   8 #include "CCLayerImpl.h"
   9 #include "GraphicsContext3D.h"
  10 #include "IntSize.h"
  11 #include <public/WebTransformationMatrix.h>
  12 #include <public/WebVideoFrameProvider.h>
  13
  14 namespace WebKit {
  15 class WebVideoFrame;
  16 }
  17
  18 namespace cc {
  19
  20 class CCLayerTreeHostImpl;
  21 class CCVideoLayerImpl;
  22
  23 class CCVideoLayerImpl : public CCLayerImpl
  24                        , public WebKit::WebVideoFrameProvider::Client {
  25 public:
  26     static PassOwnPtr<CCVideoLayerImpl> create(int id, WebKit::WebVideoFrameProvider* provider)
  27     {
  28         return adoptPtr(new CCVideoLayerImpl(id, provider));
  29     }
  30     virtual ~CCVideoLayerImpl();
  31
  32     virtual void willDraw(CCResourceProvider*) OVERRIDE;
  33     virtual void appendQuads(CCQuadSink&, CCAppendQuadsData&) OVERRIDE;
  34     virtual void didDraw(CCResourceProvider*) OVERRIDE;
  35
  36     virtual void dumpLayerProperties(std::string*, int indent) const OVERRIDE;
  37
  38     Mutex& providerMutex() { return m_providerMutex; }
  39
  40     // WebKit::WebVideoFrameProvider::Client implementation.
  41     virtual void stopUsingProvider(); // Callable on any thread.
  42     virtual void didReceiveFrame(); // Callable on impl thread.
  43     virtual void didUpdateMatrix(const float*); // Callable on impl thread.
  44
  45     virtual void didLoseContext() OVERRIDE;
  46
  47     void setNeedsRedraw();
  48
  49     struct FramePlane {
  50         CCResourceProvider::ResourceId resourceId;
  51         IntSize size;
  52         GC3Denum format;
  53         IntSize visibleSize;
  54
  55         FramePlane() : resourceId(0) { }
  56
  57         bool allocateData(CCResourceProvider*);
  58         void freeData(CCResourceProvider*);
  59     };
  60
  61 private:
  62     CCVideoLayerImpl(int, WebKit::WebVideoFrameProvider*);
  63
  64     static IntSize computeVisibleSize(const WebKit::WebVideoFrame&, unsigned plane);
  65     virtual const char* layerTypeAsString() const OVERRIDE;
  66
  67     void willDrawInternal(CCResourceProvider*);
  68     bool allocatePlaneData(CCResourceProvider*);
  69     bool copyPlaneData(CCResourceProvider*);
  70     void freePlaneData(CCResourceProvider*);
  71     void freeUnusedPlaneData(CCResourceProvider*);
  72
  73     // Guards the destruction of m_provider and the frame that it provides
  74     Mutex m_providerMutex;
  75     WebKit::WebVideoFrameProvider* m_provider;
  76
  77     WebKit::WebTransformationMatrix m_streamTextureMatrix;
  78
  79     WebKit::WebVideoFrame* m_frame;
  80     GC3Denum m_format;
  81     CCResourceProvider::ResourceId m_externalTextureResource;
  82
  83     // Each index in this array corresponds to a plane in WebKit::WebVideoFrame.
  84     FramePlane m_framePlanes[WebKit::WebVideoFrame::maxPlanes];
  85 };
  86
  87 }
  88
  89 #endif // CCVideoLayerImpl_h