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// Copyright (c) 2011 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_RENDERER_GPU_VIDEO_SERVICE_HOST_H_
#define CONTENT_RENDERER_GPU_VIDEO_SERVICE_HOST_H_
#include "base/memory/singleton.h"
#include "content/renderer/gpu_channel_host.h"
#include "content/renderer/gpu_video_decoder_host.h"
#include "ipc/ipc_channel.h"
#include "media/base/buffers.h"
#include "media/base/video_frame.h"
#include "media/video/video_decode_accelerator.h"
class GpuVideoDecodeAcceleratorHost;
// GpuVideoServiceHost lives on IO thread and is used to dispatch IPC messages
// to GpuVideoDecoderHost objects.
class GpuVideoServiceHost : public IPC::ChannelProxy::MessageFilter {
public:
GpuVideoServiceHost();
virtual ~GpuVideoServiceHost();
// IPC::ChannelProxy::MessageFilter implementations, called on IO thread.
virtual bool OnMessageReceived(const IPC::Message& message);
virtual void OnFilterAdded(IPC::Channel* channel);
virtual void OnFilterRemoved();
virtual void OnChannelClosing();
// Register a callback to be notified when |*this| can be used to
// CreateVideo{Decoder,Accelerator} below. Called on RenderThread.
// |on_initialized| will get invoked in-line in this function if |*this| is
// already ready for use, and asynchronously after this function returns
// otherwise.
void SetOnInitialized(const base::Closure& on_initialized);
// Called on RenderThread to create a hardware accelerated video decoder
// in the GPU process.
//
// A routing ID for the GLES2 context needs to be provided when creating a
// hardware video decoder. This is important because the resources used by
// the video decoder needs to be shared with the GLES2 context corresponding
// to the RenderView.
//
// This means that a GPU video decoder is tied to a specific RenderView and
// its GLES2 context in the GPU process.
//
// Returns a GpuVideoDecoderHost as a handle to control the video decoder.
//
// Note: OnFilterAdded() MUST be called before these methods are called,
// because they require |channel_| to be non-NULL.
GpuVideoDecoderHost* CreateVideoDecoder(int context_route_id);
GpuVideoDecodeAcceleratorHost* CreateVideoAccelerator(
media::VideoDecodeAccelerator::Client* client);
private:
// Guards all members other than |router_|.
base::Lock lock_;
// Reference to the channel that the service listens to.
IPC::Channel* channel_;
// Router to send messages to a GpuVideoDecoderHost.
MessageRouter router_;
// ID for the next GpuVideoDecoderHost.
int32 next_decoder_host_id_;
// Callback to invoke when initialized.
base::Closure on_initialized_;
DISALLOW_COPY_AND_ASSIGN(GpuVideoServiceHost);
};
#endif // CONTENT_RENDERER_GPU_VIDEO_SERVICE_HOST_H_
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