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
3 // found in the LICENSE file.
5 #ifndef MEDIA_BLINK_SKCANVAS_VIDEO_RENDERER_H_
6 #define MEDIA_BLINK_SKCANVAS_VIDEO_RENDERER_H_
8 #include "base/memory/ref_counted.h"
9 #include "base/time/time.h"
10 #include "base/timer/timer.h"
11 #include "media/base/media_export.h"
12 #include "media/base/video_rotation.h"
13 #include "media/filters/context_3d.h"
14 #include "third_party/skia/include/core/SkBitmap.h"
15 #include "third_party/skia/include/core/SkXfermode.h"
16 #include "ui/gfx/geometry/rect.h"
23 class VideoImageGenerator
;
25 // Handles rendering of VideoFrames to SkCanvases, doing any necessary YUV
26 // conversion and caching of resulting RGB bitmaps.
27 class MEDIA_EXPORT SkCanvasVideoRenderer
{
29 SkCanvasVideoRenderer();
30 ~SkCanvasVideoRenderer();
32 // Paints |video_frame| on |canvas|, scaling and rotating the result to fit
33 // dimensions specified by |dest_rect|.
34 // If the format of |video_frame| is VideoFrame::NATIVE_TEXTURE, |context_3d|
37 // Black will be painted on |canvas| if |video_frame| is null.
38 void Paint(const scoped_refptr
<VideoFrame
>& video_frame
,
40 const gfx::RectF
& dest_rect
,
42 SkXfermode::Mode mode
,
43 VideoRotation video_rotation
,
44 const Context3D
& context_3d
);
46 // Copy |video_frame| on |canvas|.
47 // If the format of |video_frame| is VideoFrame::NATIVE_TEXTURE, |context_3d|
49 void Copy(const scoped_refptr
<VideoFrame
>& video_frame
,
51 const Context3D
& context_3d
);
53 // Convert the contents of |video_frame| to raw RGB pixels. |rgb_pixels|
54 // should point into a buffer large enough to hold as many 32 bit RGBA pixels
55 // as are in the visible_rect() area of the frame.
56 static void ConvertVideoFrameToRGBPixels(
57 const scoped_refptr
<media::VideoFrame
>& video_frame
,
61 // Copy the contents of texture of |video_frame| to texture |texture|.
62 // |level|, |internal_format|, |type| specify target texture |texture|.
63 // The format of |video_frame| must be VideoFrame::NATIVE_TEXTURE.
64 static void CopyVideoFrameTextureToGLTexture(gpu::gles2::GLES2Interface
* gl
,
65 VideoFrame
* video_frame
,
67 unsigned int internal_format
,
69 bool premultiply_alpha
,
73 void ResetLastFrame();
74 void ResetAcceleratedLastFrame();
76 // An RGB bitmap and corresponding timestamp of the previously converted
77 // video frame data by software color space conversion.
79 base::TimeDelta last_frame_timestamp_
;
80 // If |last_frame_| is not used for a while, it's deleted to save memory.
81 base::DelayTimer
<SkCanvasVideoRenderer
> frame_deleting_timer_
;
83 // This is a hardware accelerated copy of the frame generated by
84 // |accelerated_generator_|.
85 // It's used when |canvas| parameter in Paint() is Ganesh canvas.
86 // Note: all GrContext in SkCanvas instances are same.
87 SkBitmap accelerated_last_frame_
;
88 VideoImageGenerator
* accelerated_generator_
;
89 base::TimeDelta accelerated_last_frame_timestamp_
;
90 base::DelayTimer
<SkCanvasVideoRenderer
> accelerated_frame_deleting_timer_
;
92 DISALLOW_COPY_AND_ASSIGN(SkCanvasVideoRenderer
);
97 #endif // MEDIA_BLINK_SKCANVAS_VIDEO_RENDERER_H_