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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_GPU_CHANNEL_HOST_H_
#define CONTENT_RENDERER_GPU_GPU_CHANNEL_HOST_H_
#pragma once
#include <string>
#include <vector>
#include "base/hash_tables.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/process_util.h"
#include "base/synchronization/lock.h"
#include "content/common/gpu/gpu_info.h"
#include "content/common/message_router.h"
#include "content/renderer/gpu/gpu_video_decode_accelerator_host.h"
#include "ipc/ipc_channel_handle.h"
#include "ipc/ipc_channel_proxy.h"
#include "ipc/ipc_sync_channel.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/gfx/size.h"
class CommandBufferProxy;
class GpuSurfaceProxy;
class GURL;
class TransportTextureService;
namespace base {
class MessageLoopProxy;
}
namespace IPC {
class SyncMessageFilter;
}
// Encapsulates an IPC channel between the renderer and one plugin process.
// On the plugin side there's a corresponding GpuChannel.
class GpuChannelHost : public IPC::Message::Sender,
public base::RefCountedThreadSafe<GpuChannelHost> {
public:
enum State {
// Not yet connected.
kUnconnected,
// Ready to use.
kConnected,
// An error caused the host to become disconnected. Recreate channel to
// reestablish connection.
kLost
};
// Called on the render thread
GpuChannelHost();
virtual ~GpuChannelHost();
// Connect to GPU process channel.
void Connect(const IPC::ChannelHandle& channel_handle,
base::ProcessHandle renderer_process_for_gpu);
State state() const { return state_; }
// Change state to kLost.
void SetStateLost();
// The GPU stats reported by the GPU process.
void set_gpu_info(const GPUInfo& gpu_info);
const GPUInfo& gpu_info() const;
void OnChannelError();
// IPC::Message::Sender implementation:
virtual bool Send(IPC::Message* msg);
// Create and connect to a command buffer in the GPU process.
CommandBufferProxy* CreateViewCommandBuffer(
int render_view_id,
CommandBufferProxy* share_group,
const std::string& allowed_extensions,
const std::vector<int32>& attribs,
const GURL& active_url);
// Create and connect to a command buffer in the GPU process.
CommandBufferProxy* CreateOffscreenCommandBuffer(
const gfx::Size& size,
CommandBufferProxy* share_group,
const std::string& allowed_extensions,
const std::vector<int32>& attribs,
const GURL& active_url);
// Creates a video decoder in the GPU process.
// Returned pointer is owned by the CommandBufferProxy for |route_id|.
GpuVideoDecodeAcceleratorHost* CreateVideoDecoder(
int command_buffer_route_id,
media::VideoDecodeAccelerator::Profile profile,
media::VideoDecodeAccelerator::Client* client);
// Destroy a command buffer created by this channel.
void DestroyCommandBuffer(CommandBufferProxy* command_buffer);
TransportTextureService* transport_texture_service() {
return transport_texture_service_.get();
}
// Add a route for the current message loop.
void AddRoute(int route_id, base::WeakPtr<IPC::Channel::Listener> listener);
void RemoveRoute(int route_id);
private:
// An shim class for working with listeners between threads.
// It is used to post a task to the thread that owns the listener,
// and where it's safe to dereference the weak pointer.
class Listener :
public base::RefCountedThreadSafe<Listener> {
public:
Listener(base::WeakPtr<IPC::Channel::Listener> listener,
scoped_refptr<base::MessageLoopProxy> loop);
virtual ~Listener();
void DispatchMessage(const IPC::Message& msg);
void DispatchError();
scoped_refptr<base::MessageLoopProxy> loop() { return loop_; }
private:
base::WeakPtr<IPC::Channel::Listener> listener_;
scoped_refptr<base::MessageLoopProxy> loop_;
};
// A filter used internally to route incoming messages from the IO thread
// to the correct message loop.
class MessageFilter : public IPC::ChannelProxy::MessageFilter {
public:
MessageFilter(GpuChannelHost* parent);
virtual ~MessageFilter();
void AddRoute(int route_id,
base::WeakPtr<IPC::Channel::Listener> listener,
scoped_refptr<base::MessageLoopProxy> loop);
void RemoveRoute(int route_id);
// IPC::ChannelProxy::MessageFilter implementation:
virtual bool OnMessageReceived(const IPC::Message& msg);
virtual void OnChannelError();
private:
GpuChannelHost* parent_;
typedef base::hash_map<int,
scoped_refptr<GpuChannelHost::Listener> > ListenerMap;
ListenerMap listeners_;
};
State state_;
GPUInfo gpu_info_;
scoped_ptr<IPC::SyncChannel> channel_;
scoped_refptr<MessageFilter> channel_filter_;
// Used to look up a proxy from its routing id.
typedef base::hash_map<int, CommandBufferProxy*> ProxyMap;
ProxyMap proxies_;
// A lock to guard against concurrent access to members like the proxies map
// for calls from contexts that may live on the compositor or main thread.
mutable base::Lock context_lock_;
// This is a MessageFilter to intercept IPC messages related to transport
// textures. These messages are routed to TransportTextureHost.
scoped_refptr<TransportTextureService> transport_texture_service_;
// A filter for sending messages from thread other than the main thread.
scoped_refptr<IPC::SyncMessageFilter> sync_filter_;
DISALLOW_COPY_AND_ASSIGN(GpuChannelHost);
};
#endif // CONTENT_RENDERER_GPU_GPU_CHANNEL_HOST_H_
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