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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 CONTENT_COMMON_GPU_CLIENT_GPU_VIDEO_DECODE_ACCELERATOR_HOST_H_
#define CONTENT_COMMON_GPU_CLIENT_GPU_VIDEO_DECODE_ACCELERATOR_HOST_H_
#include <vector>
#include "base/memory/weak_ptr.h"
#include "base/threading/non_thread_safe.h"
#include "content/common/gpu/client/command_buffer_proxy_impl.h"
#include "ipc/ipc_listener.h"
#include "media/video/video_decode_accelerator.h"
#include "ui/gfx/size.h"
namespace content {
class GpuChannelHost;
// This class is used to talk to VideoDecodeAccelerator in the Gpu process
// through IPC messages.
class GpuVideoDecodeAcceleratorHost
: public IPC::Listener,
public media::VideoDecodeAccelerator,
public CommandBufferProxyImpl::DeletionObserver,
public base::NonThreadSafe {
public:
// |this| is guaranteed not to outlive |channel| and |impl|. (See comments
// for |channel_| and |impl_|.)
GpuVideoDecodeAcceleratorHost(GpuChannelHost* channel,
CommandBufferProxyImpl* impl);
// IPC::Listener implementation.
virtual void OnChannelError() OVERRIDE;
virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
// media::VideoDecodeAccelerator implementation.
virtual bool Initialize(media::VideoCodecProfile profile,
Client* client) OVERRIDE;
virtual void Decode(const media::BitstreamBuffer& bitstream_buffer) OVERRIDE;
virtual void AssignPictureBuffers(
const std::vector<media::PictureBuffer>& buffers) OVERRIDE;
virtual void ReusePictureBuffer(int32 picture_buffer_id) OVERRIDE;
virtual void Flush() OVERRIDE;
virtual void Reset() OVERRIDE;
virtual void Destroy() OVERRIDE;
// CommandBufferProxyImpl::DeletionObserver implemetnation.
virtual void OnWillDeleteImpl() OVERRIDE;
private:
// Only Destroy() should be deleting |this|.
virtual ~GpuVideoDecodeAcceleratorHost();
// Notify |client_| of an error. Posts a task to avoid re-entrancy.
void PostNotifyError(Error);
void Send(IPC::Message* message);
// IPC handlers, proxying media::VideoDecodeAccelerator::Client for the GPU
// process. Should not be called directly.
void OnBitstreamBufferProcessed(int32 bitstream_buffer_id);
void OnProvidePictureBuffer(uint32 num_requested_buffers,
const gfx::Size& dimensions,
uint32 texture_target);
void OnDismissPictureBuffer(int32 picture_buffer_id);
void OnPictureReady(int32 picture_buffer_id,
int32 bitstream_buffer_id,
const gfx::Rect& visible_rect);
void OnFlushDone();
void OnResetDone();
void OnNotifyError(uint32 error);
// Unowned reference to the GpuChannelHost to send IPC messages to the GPU
// process. |channel_| outlives |impl_|, so the reference is always valid as
// long as it is not NULL.
GpuChannelHost* channel_;
// Route ID for the associated decoder in the GPU process.
int32 decoder_route_id_;
// The client that will receive callbacks from the decoder.
Client* client_;
// Unowned reference to the CommandBufferProxyImpl that created us. |this|
// registers as a DeletionObserver of |impl_|, the so reference is always
// valid as long as it is not NULL.
CommandBufferProxyImpl* impl_;
// Requested dimensions of the buffer, from ProvidePictureBuffers().
gfx::Size picture_buffer_dimensions_;
// WeakPtr factory for posting tasks back to itself.
base::WeakPtrFactory<GpuVideoDecodeAcceleratorHost> weak_this_factory_;
DISALLOW_COPY_AND_ASSIGN(GpuVideoDecodeAcceleratorHost);
};
} // namespace content
#endif // CONTENT_COMMON_GPU_CLIENT_GPU_VIDEO_DECODE_ACCELERATOR_HOST_H_