Sample code: IPC Transport object for GPU

content/common/gpu/client/ipc/command_buffer_ipc_transport.h

+// Copyright 2015 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_COMMAND_BUFFER_IPC_TRANSPORT_H_
+#define CONTENT_COMMON_GPU_CLIENT_COMMAND_BUFFER_IPC_TRANSPORT_H_
+
+#include "gpu/command_buffer/common/command_buffer.h"
+#include "media/video/video_decode_accelerator.h"
+#include "media/video/video_encode_accelerator.h"
+#include "ui/events/latency_info.h"
+#include "ui/gfx/swap_result.h"
+
+namespace gpu {
+struct Capabilities;
+struct Mailbox;
+struct SyncToken;
+}
+
+namespace content {
+
+class GpuVideoDecodeAcceleratorHostIPCTransport;
+class GpuVideoEncodeAcceleratorHostIPCTransport;
+struct CommandBufferConsoleMessage;
+struct CreateImageParams;
+
+class CommandBufferIPCTransport {
+ public:
+  class Client {
+   public:
+    virtual void OnConsoleMessage(
+        const CommandBufferConsoleMessage& message) = 0;
+
+    virtual void OnChannelError() = 0;
+
+    virtual void OnDestroyed(gpu::error::ContextLostReason reason,
+                             gpu::error::Error error) = 0;
+
+    virtual void OnDidHandleMessage() = 0;
+
+    virtual void OnWillHandleMessage() = 0;
+
+    virtual void OnSignalAck(uint32_t id) = 0;
+
+    virtual void OnSwapBuffersCompleted(
+        const std::vector<ui::LatencyInfo>& latency_info,
+        gfx::SwapResult result) = 0;
+
+    virtual void OnUpdateState(const gpu::CommandBuffer::State& state) = 0;
+
+    virtual void OnUpdateVSyncParameters(base::TimeTicks timebase,
+                                         base::TimeDelta interval) = 0;
+
+   protected:
+    virtual ~Client() {}
+  };
+
+  virtual ~CommandBufferIPCTransport() {}
+
+  virtual scoped_ptr<base::SharedMemory> AllocateSharedMemory(size_t size) = 0;
+
+  virtual bool CreateImage(const CreateImageParams& params) = 0;
+
+  virtual bool CreateStreamTexture(uint32_t client_texture_id,
+                                   int32_t* stream_id,
+                                   bool* succeeded) = 0;
+
+  virtual bool CreateVideoDecoder(
+      GpuVideoDecodeAcceleratorHostIPCTransport* transport,
+      const media::VideoDecodeAccelerator::Config& config,
+      bool* succeeded) = 0;
+
+  virtual bool CreateVideoEncoder(
+      GpuVideoEncodeAcceleratorHostIPCTransport* transport,
+      media::VideoPixelFormat input_format,
+      const gfx::Size& input_visible_size,
+      media::VideoCodecProfile output_profile,
+      uint32_t initial_bitrate,
+      bool* succeeded) = 0;
+
+  virtual bool DestroyImage(int32_t id) = 0;
+
+  virtual bool DestroyTransferBuffer(int32_t id) = 0;
+
+  // TODO(fsamuel): It's unclear whether we really need this here.
+  virtual uint64_t GetCommandBufferID() const = 0;
+
+  virtual int32_t GetShareGroupID() const = 0;
+
+  virtual bool Initialize(base::SharedMemoryHandle shared_state_handle,
+                          bool* result,
+                          gpu::Capabilities* capabilities) = 0;
+
+  virtual bool ProduceFrontBuffer(const gpu::Mailbox& mailbox) = 0;
+
+  virtual bool RegisterTransferBuffer(int32_t id,
+                                      base::SharedMemoryHandle transfer_buffer,
+                                      uint32_t size) = 0;
+
+  virtual bool SetGetBuffer(int32_t shm_id) = 0;
+
+  virtual void SetClient(Client* client) = 0;
+
+  virtual bool SignalQuery(uint32_t query, uint32_t signal_id) = 0;
+
+  virtual bool SignalSyncToken(const gpu::SyncToken& sync_token,
+                               uint32_t signal_id) = 0;
+
+  virtual bool WaitForGetOffsetInRange(int32_t start,
+                                       int32_t end,
+                                       gpu::CommandBuffer::State* state) = 0;
+
+  virtual bool WaitForTokenInRange(int32_t start,
+                                   int32_t end,
+                                   gpu::CommandBuffer::State* state) = 0;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_COMMON_GPU_CLIENT_COMMAND_BUFFER_IPC_TRANSPORT_H_