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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef MEDIA_RENDERERS_SKCANVAS_VIDEO_RENDERER_H_ | 5 #ifndef MEDIA_RENDERERS_SKCANVAS_VIDEO_RENDERER_H_ |
6 #define MEDIA_RENDERERS_SKCANVAS_VIDEO_RENDERER_H_ | 6 #define MEDIA_RENDERERS_SKCANVAS_VIDEO_RENDERER_H_ |
7 | 7 |
8 #include <stddef.h> | 8 #include <stddef.h> |
9 #include <stdint.h> | 9 #include <stdint.h> |
10 | 10 |
11 #include "base/macros.h" | 11 #include "base/macros.h" |
12 #include "base/memory/ref_counted.h" | 12 #include "base/memory/ref_counted.h" |
13 #include "base/threading/thread_checker.h" | 13 #include "base/threading/thread_checker.h" |
14 #include "base/time/time.h" | 14 #include "base/time/time.h" |
15 #include "base/timer/timer.h" | 15 #include "base/timer/timer.h" |
16 #include "media/base/media_export.h" | 16 #include "media/base/media_export.h" |
17 #include "media/base/timestamp_constants.h" | 17 #include "media/base/timestamp_constants.h" |
18 #include "media/base/video_frame.h" | 18 #include "media/base/video_frame.h" |
19 #include "media/base/video_rotation.h" | 19 #include "media/base/video_rotation.h" |
20 #include "media/filters/context_3d.h" | 20 #include "media/filters/context_3d.h" |
21 #include "third_party/skia/include/core/SkImage.h" | 21 #include "third_party/skia/include/core/SkImage.h" |
22 #include "third_party/skia/include/core/SkRefCnt.h" | 22 #include "third_party/skia/include/core/SkRefCnt.h" |
23 #include "third_party/skia/include/core/SkXfermode.h" | 23 #include "third_party/skia/include/core/SkXfermode.h" |
24 | 24 |
25 class SkCanvas; | 25 class SkCanvas; |
26 class SkImage; | |
27 | 26 |
28 namespace gfx { | 27 namespace gfx { |
29 class RectF; | 28 class RectF; |
30 } | 29 } |
31 | 30 |
32 namespace media { | 31 namespace media { |
33 class VideoImageGenerator; | 32 class VideoImageGenerator; |
34 | 33 |
35 // Handles rendering of VideoFrames to SkCanvases. | 34 // Handles rendering of VideoFrames to SkCanvases. |
36 class MEDIA_EXPORT SkCanvasVideoRenderer { | 35 class MEDIA_EXPORT SkCanvasVideoRenderer { |
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86 bool CopyVideoFrameTexturesToGLTexture( | 85 bool CopyVideoFrameTexturesToGLTexture( |
87 const Context3D& context_3d, | 86 const Context3D& context_3d, |
88 gpu::gles2::GLES2Interface* destination_gl, | 87 gpu::gles2::GLES2Interface* destination_gl, |
89 const scoped_refptr<VideoFrame>& video_frame, | 88 const scoped_refptr<VideoFrame>& video_frame, |
90 unsigned int texture, | 89 unsigned int texture, |
91 unsigned int internal_format, | 90 unsigned int internal_format, |
92 unsigned int type, | 91 unsigned int type, |
93 bool premultiply_alpha, | 92 bool premultiply_alpha, |
94 bool flip_y); | 93 bool flip_y); |
95 | 94 |
| 95 // Method handles reinterpreting two components RG8 as 16 bit value for Y16 |
| 96 // format and optimizing upload-to-texture for some video frame and texture |
| 97 // formats. If needed, there is a conversion followed by a tex(Sub)Image2D or |
| 98 // tex(Sub)Image3D call. |
| 99 // |format|, |internal_format|, |type| specify target texture |texture|. |
| 100 // |xoffset|, |yoffset|, |zoffset| are used when functionID defines sub image |
| 101 // calls. |
| 102 // Returns false if there is no implementation for given parameters or if the |
| 103 // call fails. |
| 104 static bool TexImageImpl(const char* functionID, |
| 105 unsigned target, |
| 106 gpu::gles2::GLES2Interface* gl, |
| 107 VideoFrame* video_frame, |
| 108 int level, |
| 109 int internalformat, |
| 110 unsigned format, |
| 111 unsigned type, |
| 112 int xoffset, |
| 113 int yoffset, |
| 114 int zoffset, |
| 115 bool flipY, |
| 116 bool premultiplyAlpha); |
| 117 |
96 // In general, We hold the most recently painted frame to increase the | 118 // In general, We hold the most recently painted frame to increase the |
97 // performance for the case that the same frame needs to be painted | 119 // performance for the case that the same frame needs to be painted |
98 // repeatedly. Call this function if you are sure the most recent frame will | 120 // repeatedly. Call this function if you are sure the most recent frame will |
99 // never be painted again, so we can release the resource. | 121 // never be painted again, so we can release the resource. |
100 void ResetCache(); | 122 void ResetCache(); |
101 | 123 |
102 void CorrectLastImageDimensions(const SkIRect& visible_rect); | 124 void CorrectLastImageDimensions(const SkIRect& visible_rect); |
103 | 125 |
104 // Used for unit test. | 126 // Used for unit test. |
105 SkISize LastImageDimensionsForTesting(); | 127 SkISize LastImageDimensionsForTesting(); |
106 | 128 |
107 private: | 129 private: |
108 // Update the cache holding the most-recently-painted frame. Returns false | 130 // Update the cache holding the most-recently-painted frame. Returns false |
109 // if the image couldn't be updated. | 131 // if the image couldn't be updated. |
110 bool UpdateLastImage(const scoped_refptr<VideoFrame>& video_frame, | 132 bool UpdateLastImage(const scoped_refptr<VideoFrame>& video_frame, |
111 const Context3D& context_3d); | 133 const Context3D& context_3d); |
112 | 134 |
| 135 // Reinterpret the content of RG8 texture as R16 (normalized value) to float |
| 136 // intermediate texture and then copy to texture. All the available RGB color |
| 137 // components in the texture get the same value. |
| 138 // Reinterpretting texture happens on canvas gl (context_3d) to enable caching |
| 139 // resources for following calls. Target |texture| should live on |target_gl| |
| 140 // after the call. |
| 141 void CopyRG8ToTexture(const Context3D& context_3d, |
| 142 gpu::gles2::GLES2Interface* target_gl, |
| 143 VideoFrame* video_frame, |
| 144 unsigned texture, |
| 145 unsigned internal_format, |
| 146 unsigned type, |
| 147 bool flip_y); |
| 148 |
| 149 // Helper method used by CopyRG8ToTexture. Target used for both |
| 150 // |source_texture| and |target_texture| is GL_TEXTURE_2D. |
| 151 void DoCopyRG8ToTexture(const Context3D& context_3d, |
| 152 unsigned source_texture, |
| 153 unsigned target_texture, |
| 154 unsigned format, |
| 155 unsigned internal_format, |
| 156 unsigned type, |
| 157 unsigned width, |
| 158 unsigned height, |
| 159 bool flip_y); |
| 160 |
113 // Last image used to draw to the canvas. | 161 // Last image used to draw to the canvas. |
114 sk_sp<SkImage> last_image_; | 162 sk_sp<SkImage> last_image_; |
115 // Timestamp of the videoframe used to generate |last_image_|. | 163 // Timestamp of the videoframe used to generate |last_image_|. |
116 base::TimeDelta last_timestamp_ = media::kNoTimestamp; | 164 base::TimeDelta last_timestamp_ = media::kNoTimestamp; |
117 // If |last_image_| is not used for a while, it's deleted to save memory. | 165 // If |last_image_| is not used for a while, it's deleted to save memory. |
118 base::DelayTimer last_image_deleting_timer_; | 166 base::DelayTimer last_image_deleting_timer_; |
119 | 167 |
120 // Used for DCHECKs to ensure method calls executed in the correct thread. | 168 // Used for DCHECKs to ensure method calls executed in the correct thread. |
121 base::ThreadChecker thread_checker_; | 169 base::ThreadChecker thread_checker_; |
| 170 // Resources rg8_to_texture_* are used for RG8 to float texture GPU |
| 171 // conversion. |
| 172 unsigned rg8_to_texture_program_ = 0; |
| 173 unsigned rg8_to_texture_vertices_buffer_ = 0; |
| 174 // Used for cached GL resources (e.g. rg8_to_texture_program) lifecycle |
| 175 // management. |
| 176 unsigned cached_gl_resources_gr_context_id_ = 0; |
122 | 177 |
123 // Used for unit test. | 178 // Used for unit test. |
124 SkISize last_image_dimensions_for_testing_; | 179 SkISize last_image_dimensions_for_testing_; |
125 | 180 |
126 DISALLOW_COPY_AND_ASSIGN(SkCanvasVideoRenderer); | 181 DISALLOW_COPY_AND_ASSIGN(SkCanvasVideoRenderer); |
127 }; | 182 }; |
128 | 183 |
129 } // namespace media | 184 } // namespace media |
130 | 185 |
131 #endif // MEDIA_RENDERERS_SKCANVAS_VIDEO_RENDERER_H_ | 186 #endif // MEDIA_RENDERERS_SKCANVAS_VIDEO_RENDERER_H_ |
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