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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_CHANNEL_HOST_H_
#define CONTENT_COMMON_GPU_CLIENT_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.h"
#include "base/process_util.h"
#include "base/synchronization/lock.h"
#include "content/common/content_export.h"
#include "content/common/gpu/gpu_process_launch_causes.h"
#include "content/common/message_router.h"
#include "content/public/common/gpu_info.h"
#include "content/common/gpu/client/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/gl/gpu_preference.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/gfx/size.h"
class CommandBufferProxy;
class CommandBufferProxyImpl;
struct GPUCreateCommandBufferConfig;
class GURL;
class TransportTextureService;
class MessageLoop;
namespace base {
class MessageLoopProxy;
}
namespace IPC {
class SyncMessageFilter;
}
struct GpuListenerInfo {
GpuListenerInfo();
~GpuListenerInfo();
base::WeakPtr<IPC::Channel::Listener> listener;
scoped_refptr<base::MessageLoopProxy> loop;
};
class CONTENT_EXPORT GpuChannelHostFactory {
public:
virtual ~GpuChannelHostFactory() {}
virtual bool IsMainThread() = 0;
virtual bool IsIOThread() = 0;
virtual MessageLoop* GetMainLoop() = 0;
virtual scoped_refptr<base::MessageLoopProxy> GetIOLoopProxy() = 0;
virtual base::WaitableEvent* GetShutDownEvent() = 0;
virtual scoped_ptr<base::SharedMemory> AllocateSharedMemory(uint32 size) = 0;
virtual int32 CreateViewCommandBuffer(
int32 surface_id, const GPUCreateCommandBufferConfig& init_params) = 0;
virtual GpuChannelHost* EstablishGpuChannelSync(
content::CauseForGpuLaunch) = 0;
};
// Encapsulates an IPC channel between the client and one GPU process.
// On the GPU process 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(GpuChannelHostFactory* factory,
int gpu_host_id,
int client_id);
virtual ~GpuChannelHost();
// Connect to GPU process channel.
void Connect(const IPC::ChannelHandle& channel_handle);
State state() const { return state_; }
// Change state to kLost.
void SetStateLost();
// The GPU stats reported by the GPU process.
void set_gpu_info(const content::GPUInfo& gpu_info);
const content::GPUInfo& gpu_info() const;
void OnChannelError();
// IPC::Message::Sender implementation:
virtual bool Send(IPC::Message* msg) OVERRIDE;
// Create and connect to a command buffer in the GPU process.
CommandBufferProxy* CreateViewCommandBuffer(
int32 surface_id,
CommandBufferProxy* share_group,
const std::string& allowed_extensions,
const std::vector<int32>& attribs,
const GURL& active_url,
gfx::GpuPreference gpu_preference);
// 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,
gfx::GpuPreference gpu_preference);
// 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::VideoCodecProfile profile,
media::VideoDecodeAccelerator::Client* client);
// Destroy a command buffer created by this channel.
void DestroyCommandBuffer(CommandBufferProxy* command_buffer);
// Add a route for the current message loop.
void AddRoute(int route_id, base::WeakPtr<IPC::Channel::Listener> listener);
void RemoveRoute(int route_id);
// Asks the GPU process whether the creation or destruction of the
// given command buffer on the given GPU will provoke a switch of
// the GPU from integrated to discrete or vice versa. This requires
// all of the GL contexts in the same share group in the GPU process
// to be dropped.
bool WillGpuSwitchOccur(bool is_creating_context,
gfx::GpuPreference gpu_preference);
// Forcibly close the channel on the GPU process side. This will
// cause all command buffers on this side to soon afterward start
// registering lost contexts. It also has the side effect of setting
// the state on this side to lost.
void ForciblyCloseChannel();
GpuChannelHostFactory* factory() const { return factory_; }
int gpu_host_id() const { return gpu_host_id_; }
base::ProcessId gpu_pid() const { return channel_->peer_pid(); }
int client_id() const { return client_id_; }
private:
// A filter used internally to route incoming messages from the IO thread
// to the correct message loop.
class MessageFilter : public IPC::ChannelProxy::MessageFilter {
public:
explicit 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) OVERRIDE;
virtual void OnChannelError() OVERRIDE;
private:
GpuChannelHost* parent_;
typedef base::hash_map<int, GpuListenerInfo> ListenerMap;
ListenerMap listeners_;
};
GpuChannelHostFactory* factory_;
int client_id_;
int gpu_host_id_;
State state_;
content::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, CommandBufferProxyImpl*> 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_;
// 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_COMMON_GPU_CLIENT_GPU_CHANNEL_HOST_H_
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