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// Copyright 2014 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 REMOTING_CLIENT_PLUGIN_PEPPER_VIDEO_RENDERER_2D_H_
#define REMOTING_CLIENT_PLUGIN_PEPPER_VIDEO_RENDERER_2D_H_
#include <list>
#include "base/compiler_specific.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "base/threading/non_thread_safe.h"
#include "ppapi/cpp/graphics_2d.h"
#include "ppapi/cpp/point.h"
#include "ppapi/cpp/view.h"
#include "ppapi/utility/completion_callback_factory.h"
#include "remoting/client/frame_consumer.h"
#include "remoting/client/plugin/pepper_video_renderer.h"
#include "third_party/webrtc/modules/desktop_capture/desktop_geometry.h"
#include "third_party/webrtc/modules/desktop_capture/desktop_region.h"
namespace base {
class Time;
} // namespace base
namespace webrtc {
class DesktopFrame;
} // namespace webrtc
namespace remoting {
class FrameConsumerProxy;
class SoftwareVideoRenderer;
// Video renderer that wraps SoftwareVideoRenderer and displays it using Pepper
// 2D graphics API.
class PepperVideoRenderer2D : public PepperVideoRenderer,
public FrameConsumer,
public base::NonThreadSafe {
public:
PepperVideoRenderer2D();
~PepperVideoRenderer2D() override;
// PepperVideoRenderer interface.
bool Initialize(pp::Instance* instance,
const ClientContext& context,
EventHandler* event_handler) override;
void OnViewChanged(const pp::View& view) override;
// VideoRenderer interface.
void OnSessionConfig(const protocol::SessionConfig& config) override;
ChromotingStats* GetStats() override;
protocol::VideoStub* GetVideoStub() override;
private:
// FrameConsumer implementation.
void ApplyBuffer(const webrtc::DesktopSize& view_size,
const webrtc::DesktopRect& clip_area,
webrtc::DesktopFrame* buffer,
const webrtc::DesktopRegion& region,
const webrtc::DesktopRegion& shape) override;
void ReturnBuffer(webrtc::DesktopFrame* buffer) override;
void SetSourceSize(const webrtc::DesktopSize& source_size,
const webrtc::DesktopVector& dpi) override;
PixelFormat GetPixelFormat() override;
// Helper to allocate buffers for the decoder.
void AllocateBuffers();
// Frees a frame buffer previously allocated by AllocateBuffer.
void FreeBuffer(webrtc::DesktopFrame* buffer);
// Renders the parts of |buffer| identified by |region| to the view. If the
// clip area of the view has changed since the buffer was generated then
// FrameProducer is supplied the missed parts of |region|. The FrameProducer
// will be supplied a new buffer when FlushBuffer() completes.
void FlushBuffer(const webrtc::DesktopRect& clip_area,
webrtc::DesktopFrame* buffer,
const webrtc::DesktopRegion& region);
// Handles completion of FlushBuffer(), triggering a new buffer to be
// returned to FrameProducer for rendering.
void OnFlushDone(int result,
const base::Time& paint_start,
webrtc::DesktopFrame* buffer);
// Parameters passed to Initialize().
pp::Instance* instance_;
EventHandler* event_handler_;
pp::Graphics2D graphics2d_;
scoped_refptr<FrameConsumerProxy> frame_consumer_proxy_;
scoped_ptr<SoftwareVideoRenderer> software_video_renderer_;
// List of allocated image buffers.
std::list<webrtc::DesktopFrame*> buffers_;
// Queued buffer to paint, with clip area and dirty region in device pixels.
webrtc::DesktopFrame* merge_buffer_;
webrtc::DesktopRect merge_clip_area_;
webrtc::DesktopRegion merge_region_;
// View size in Density Independent Pixels (DIPs).
webrtc::DesktopSize dips_size_;
// Scale factor from DIPs to device pixels.
float dips_to_device_scale_;
// View size in output pixels. This is the size at which FrameProducer must
// render frames. It usually matches the DIPs size of the view, but may match
// the size in device pixels when scaling is in effect, to reduce artefacts.
webrtc::DesktopSize view_size_;
// Scale factor from output pixels to device pixels.
float dips_to_view_scale_;
// Visible area of the view, in output pixels.
webrtc::DesktopRect clip_area_;
// Size of the most recent source frame in pixels.
webrtc::DesktopSize source_size_;
// Resolution of the most recent source frame dots-per-inch.
webrtc::DesktopVector source_dpi_;
// True if there is already a Flush() pending on the Graphics2D context.
bool flush_pending_;
// True after the first call to ApplyBuffer().
bool frame_received_;
pp::CompletionCallbackFactory<PepperVideoRenderer2D> callback_factory_;
base::WeakPtrFactory<PepperVideoRenderer2D> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(PepperVideoRenderer2D);
};
} // namespace remoting
#endif // REMOTING_CLIENT_PLUGIN_PEPPER_VIDEO_RENDERER_2D_H_
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