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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_
#include <string>
#include <vector>
#include "base/atomic_sequence_num.h"
#include "base/containers/hash_tables.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/process/process.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 "gpu/config/gpu_info.h"
#include "ipc/ipc_channel_handle.h"
#include "ipc/ipc_channel_proxy.h"
#include "ipc/ipc_sync_channel.h"
#include "media/video/video_decode_accelerator.h"
#include "media/video/video_encode_accelerator.h"
#include "ui/gfx/gpu_memory_buffer.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/gfx/size.h"
#include "ui/gl/gpu_preference.h"
class GURL;
class TransportTextureService;
struct GPUCreateCommandBufferConfig;
namespace base {
class MessageLoop;
class MessageLoopProxy;
}
namespace gpu {
struct Mailbox;
}
namespace IPC {
class SyncMessageFilter;
}
namespace content {
class CommandBufferProxyImpl;
class GpuChannelHost;
struct GpuRenderingStats;
struct GpuListenerInfo {
GpuListenerInfo();
~GpuListenerInfo();
base::WeakPtr<IPC::Listener> listener;
scoped_refptr<base::MessageLoopProxy> loop;
};
class CONTENT_EXPORT GpuChannelHostFactory {
public:
typedef base::Callback<void(const gfx::Size)> CreateImageCallback;
virtual ~GpuChannelHostFactory() {}
virtual bool IsMainThread() = 0;
virtual base::MessageLoop* GetMainLoop() = 0;
virtual scoped_refptr<base::MessageLoopProxy> GetIOLoopProxy() = 0;
virtual base::WaitableEvent* GetShutDownEvent() = 0;
virtual scoped_ptr<base::SharedMemory> AllocateSharedMemory(size_t size) = 0;
virtual int32 CreateViewCommandBuffer(
int32 surface_id, const GPUCreateCommandBufferConfig& init_params) = 0;
virtual void CreateImage(
gfx::PluginWindowHandle window,
int32 image_id,
const CreateImageCallback& callback) = 0;
virtual void DeleteImage(int32 image_id, int32 sync_point) = 0;
virtual scoped_ptr<gfx::GpuMemoryBuffer> AllocateGpuMemoryBuffer(
size_t width,
size_t height,
unsigned internalformat) = 0;
};
// Encapsulates an IPC channel between the client and one GPU process.
// On the GPU process side there's a corresponding GpuChannel.
// Every method can be called on any thread with a message loop, except for the
// IO thread.
class GpuChannelHost : public IPC::Sender,
public base::RefCountedThreadSafe<GpuChannelHost> {
public:
// Must be called on the main thread (as defined by the factory).
static scoped_refptr<GpuChannelHost> Create(
GpuChannelHostFactory* factory,
int gpu_host_id,
const gpu::GPUInfo& gpu_info,
const IPC::ChannelHandle& channel_handle);
// Returns true if |handle| is a valid GpuMemoryBuffer handle that
// can be shared to the GPU process.
static bool IsValidGpuMemoryBuffer(gfx::GpuMemoryBufferHandle handle);
bool IsLost() const {
DCHECK(channel_filter_.get());
return channel_filter_->IsLost();
}
// The GPU stats reported by the GPU process.
const gpu::GPUInfo& gpu_info() const { return gpu_info_; }
// IPC::Sender implementation:
virtual bool Send(IPC::Message* msg) OVERRIDE;
// Create and connect to a command buffer in the GPU process.
CommandBufferProxyImpl* CreateViewCommandBuffer(
int32 surface_id,
CommandBufferProxyImpl* share_group,
const std::vector<int32>& attribs,
const GURL& active_url,
gfx::GpuPreference gpu_preference);
// Create and connect to a command buffer in the GPU process.
CommandBufferProxyImpl* CreateOffscreenCommandBuffer(
const gfx::Size& size,
CommandBufferProxyImpl* share_group,
const std::vector<int32>& attribs,
const GURL& active_url,
gfx::GpuPreference gpu_preference);
// Creates a video decoder in the GPU process.
scoped_ptr<media::VideoDecodeAccelerator> CreateVideoDecoder(
int command_buffer_route_id,
media::VideoCodecProfile profile,
media::VideoDecodeAccelerator::Client* client);
// Creates a video encoder in the GPU process.
scoped_ptr<media::VideoEncodeAccelerator> CreateVideoEncoder(
media::VideoEncodeAccelerator::Client* client);
// Destroy a command buffer created by this channel.
void DestroyCommandBuffer(CommandBufferProxyImpl* command_buffer);
// Collect rendering stats from GPU process.
bool CollectRenderingStatsForSurface(
int surface_id, GpuRenderingStats* stats);
// Add a route for the current message loop.
void AddRoute(int route_id, base::WeakPtr<IPC::Listener> listener);
void RemoveRoute(int route_id);
GpuChannelHostFactory* factory() const { return factory_; }
int gpu_host_id() const { return gpu_host_id_; }
// Returns a handle to the shared memory that can be sent via IPC to the
// GPU process. The caller is responsible for ensuring it is closed. Returns
// an invalid handle on failure.
base::SharedMemoryHandle ShareToGpuProcess(
base::SharedMemoryHandle source_handle);
// Generates |num| unique mailbox names that can be used with
// GL_texture_mailbox_CHROMIUM. Unlike genMailboxCHROMIUM, this IPC is
// handled only on the GPU process' IO thread, and so is not effectively
// a finish.
bool GenerateMailboxNames(unsigned num, std::vector<gpu::Mailbox>* names);
// Reserve one unused transfer buffer ID.
int32 ReserveTransferBufferId();
// Returns a GPU memory buffer handle to the buffer that can be sent via
// IPC to the GPU process. The caller is responsible for ensuring it is
// closed. Returns an invalid handle on failure.
gfx::GpuMemoryBufferHandle ShareGpuMemoryBufferToGpuProcess(
gfx::GpuMemoryBufferHandle source_handle);
// Reserve one unused gpu memory buffer ID.
int32 ReserveGpuMemoryBufferId();
private:
friend class base::RefCountedThreadSafe<GpuChannelHost>;
GpuChannelHost(GpuChannelHostFactory* factory,
int gpu_host_id,
const gpu::GPUInfo& gpu_info);
virtual ~GpuChannelHost();
void Connect(const IPC::ChannelHandle& channel_handle);
// A filter used internally to route incoming messages from the IO thread
// to the correct message loop. It also maintains some shared state between
// all the contexts.
class MessageFilter : public IPC::ChannelProxy::MessageFilter {
public:
MessageFilter();
// Called on the IO thread.
void AddRoute(int route_id,
base::WeakPtr<IPC::Listener> listener,
scoped_refptr<base::MessageLoopProxy> loop);
// Called on the IO thread.
void RemoveRoute(int route_id);
// IPC::ChannelProxy::MessageFilter implementation
// (called on the IO thread):
virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
virtual void OnChannelError() OVERRIDE;
// The following methods can be called on any thread.
// Whether the channel is lost.
bool IsLost() const;
// Gets mailboxes from the pool, and return the number of mailboxes to ask
// the GPU process to maintain a good pool size. The caller is responsible
// for sending the GpuChannelMsg_GenerateMailboxNamesAsync message.
size_t GetMailboxNames(size_t num, std::vector<gpu::Mailbox>* names);
private:
virtual ~MessageFilter();
bool OnControlMessageReceived(const IPC::Message& msg);
// Message handlers.
void OnGenerateMailboxNamesReply(const std::vector<gpu::Mailbox>& names);
// Threading notes: |listeners_| is only accessed on the IO thread. Every
// other field is protected by |lock_|.
typedef base::hash_map<int, GpuListenerInfo> ListenerMap;
ListenerMap listeners_;
// Protects all fields below this one.
mutable base::Lock lock_;
// Whether the channel has been lost.
bool lost_;
// A pool of valid mailbox names.
std::vector<gpu::Mailbox> mailbox_name_pool_;
// Number of pending mailbox requested from the GPU process.
size_t requested_mailboxes_;
};
// Threading notes: all fields are constant during the lifetime of |this|
// except:
// - |next_transfer_buffer_id_|, atomic type
// - |next_gpu_memory_buffer_id_|, atomic type
// - |proxies_|, protected by |context_lock_|
GpuChannelHostFactory* const factory_;
const int gpu_host_id_;
const gpu::GPUInfo gpu_info_;
scoped_ptr<IPC::SyncChannel> channel_;
scoped_refptr<MessageFilter> channel_filter_;
// A filter for sending messages from thread other than the main thread.
scoped_refptr<IPC::SyncMessageFilter> sync_filter_;
// Transfer buffer IDs are allocated in sequence.
base::AtomicSequenceNumber next_transfer_buffer_id_;
// Gpu memory buffer IDs are allocated in sequence.
base::AtomicSequenceNumber next_gpu_memory_buffer_id_;
// Protects proxies_.
mutable base::Lock context_lock_;
// Used to look up a proxy from its routing id.
typedef base::hash_map<int, CommandBufferProxyImpl*> ProxyMap;
ProxyMap proxies_;
DISALLOW_COPY_AND_ASSIGN(GpuChannelHost);
};
} // namespace content
#endif // CONTENT_COMMON_GPU_CLIENT_GPU_CHANNEL_HOST_H_
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