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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MEDIA_BLINK_SKCANVAS_VIDEO_RENDERER_H_
#define MEDIA_BLINK_SKCANVAS_VIDEO_RENDERER_H_
#include "base/memory/ref_counted.h"
#include "base/time/time.h"
#include "base/timer/timer.h"
#include "media/base/media_export.h"
#include "media/base/video_rotation.h"
#include "media/filters/context_3d.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "third_party/skia/include/core/SkXfermode.h"
#include "ui/gfx/geometry/rect.h"
class SkCanvas;
namespace media {
class VideoFrame;
class VideoImageGenerator;
// Handles rendering of VideoFrames to SkCanvases, doing any necessary YUV
// conversion and caching of resulting RGB bitmaps.
class MEDIA_EXPORT SkCanvasVideoRenderer {
public:
SkCanvasVideoRenderer();
~SkCanvasVideoRenderer();
// Paints |video_frame| on |canvas|, scaling and rotating the result to fit
// dimensions specified by |dest_rect|.
// If the format of |video_frame| is VideoFrame::NATIVE_TEXTURE, |context_3d|
// must be provided.
//
// Black will be painted on |canvas| if |video_frame| is null.
void Paint(const scoped_refptr<VideoFrame>& video_frame,
SkCanvas* canvas,
const gfx::RectF& dest_rect,
uint8 alpha,
SkXfermode::Mode mode,
VideoRotation video_rotation,
const Context3D& context_3d);
// Copy |video_frame| on |canvas|.
// If the format of |video_frame| is VideoFrame::NATIVE_TEXTURE, |context_3d|
// must be provided.
void Copy(const scoped_refptr<VideoFrame>& video_frame,
SkCanvas* canvas,
const Context3D& context_3d);
// Convert the contents of |video_frame| to raw RGB pixels. |rgb_pixels|
// should point into a buffer large enough to hold as many 32 bit RGBA pixels
// as are in the visible_rect() area of the frame.
static void ConvertVideoFrameToRGBPixels(
const scoped_refptr<media::VideoFrame>& video_frame,
void* rgb_pixels,
size_t row_bytes);
// Copy the contents of texture of |video_frame| to texture |texture|.
// |level|, |internal_format|, |type| specify target texture |texture|.
// The format of |video_frame| must be VideoFrame::NATIVE_TEXTURE.
static void CopyVideoFrameTextureToGLTexture(gpu::gles2::GLES2Interface* gl,
VideoFrame* video_frame,
unsigned int texture,
unsigned int internal_format,
unsigned int type,
bool premultiply_alpha,
bool flip_y);
private:
void ResetLastFrame();
void ResetAcceleratedLastFrame();
// An RGB bitmap and corresponding timestamp of the previously converted
// video frame data by software color space conversion.
SkBitmap last_frame_;
base::TimeDelta last_frame_timestamp_;
// If |last_frame_| is not used for a while, it's deleted to save memory.
base::DelayTimer<SkCanvasVideoRenderer> frame_deleting_timer_;
// This is a hardware accelerated copy of the frame generated by
// |accelerated_generator_|.
// It's used when |canvas| parameter in Paint() is Ganesh canvas.
// Note: all GrContext in SkCanvas instances are same.
SkBitmap accelerated_last_frame_;
VideoImageGenerator* accelerated_generator_;
base::TimeDelta accelerated_last_frame_timestamp_;
base::DelayTimer<SkCanvasVideoRenderer> accelerated_frame_deleting_timer_;
DISALLOW_COPY_AND_ASSIGN(SkCanvasVideoRenderer);
};
} // namespace media
#endif // MEDIA_BLINK_SKCANVAS_VIDEO_RENDERER_H_
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