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