MJPEG acceleration for video capture using VAAPI

content/common/gpu/gpu_channel.h

 // 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_GPU_CHANNEL_H_
 #define CONTENT_COMMON_GPU_GPU_CHANNEL_H_
 
 #include <deque>
 #include <string>
 
+#include "base/containers/scoped_ptr_hash_map.h"
 #include "base/id_map.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "base/memory/weak_ptr.h"
 #include "base/process/process.h"
 #include "build/build_config.h"
 #include "content/common/gpu/gpu_command_buffer_stub.h"
 #include "content/common/gpu/gpu_memory_manager.h"
 #include "content/common/gpu/gpu_result_codes.h"
+#include "content/common/gpu/media/gpu_jpeg_decode_accelerator.h"
 #include "content/common/message_router.h"
 #include "gpu/command_buffer/service/valuebuffer_manager.h"
 #include "ipc/ipc_sync_channel.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gl/gl_share_group.h"
 #include "ui/gl/gpu_preference.h"
 
 struct GPUCreateCommandBufferConfig;
 
@@ skipping 131 matching lines @@
   bool allow_future_sync_points() const { return allow_future_sync_points_; }
 
   void HandleUpdateValueState(unsigned int target,
                               const gpu::ValueState& state);
 
   // Visible for testing.
   const gpu::ValueStateMap* pending_valuebuffer_state() const {
     return pending_valuebuffer_state_.get();
   }
 
+  void ReleaseJpegDecoder(int32 route_id);
+
  private:
   friend class GpuChannelMessageFilter;
 
   void OnDestroy();
 
   bool OnControlMessageReceived(const IPC::Message& msg);
 
   void HandleMessage();
 
   // Message handlers.
   void OnCreateOffscreenCommandBuffer(
       const gfx::Size& size,
       const GPUCreateCommandBufferConfig& init_params,
       int32 route_id,
       bool* succeeded);
   void OnDestroyCommandBuffer(int32 route_id);
+  void OnCreateJpegDecoder(int32 route_id, bool* succeeded);
 
   // Decrement the count of unhandled IPC messages and defer preemption.
   void MessageProcessed();
 
   // The lifetime of objects of this class is managed by a GpuChannelManager.
   // The GpuChannelManager destroy all the GpuChannels that they own when they
   // are destroyed. So a raw pointer is safe.
   GpuChannelManager* gpu_channel_manager_;
 
   scoped_ptr<IPC::SyncChannel> channel_;
@@ skipping 25 matching lines @@
 
   scoped_refptr<gpu::gles2::MailboxManager> mailbox_manager_;
 
   scoped_refptr<gpu::gles2::SubscriptionRefSet> subscription_ref_set_;
 
   scoped_refptr<gpu::ValueStateMap> pending_valuebuffer_state_;
 
   typedef IDMap<GpuCommandBufferStub, IDMapOwnPointer> StubMap;
   StubMap stubs_;
 
+  base::ScopedPtrHashMap<int32, content::GpuJpegDecodeAccelerator>

[wuchengli, 2015/04/24 05:54:24]

Add a comment to say int32 is route id. For example, "A map from route id to
Jpeg decoder."

[kcwu, 2015/04/30 19:25:41]

Done.

+      jpeg_decoder_map_;
+
   bool log_messages_;  // True if we should log sent and received messages.
   gpu::gles2::DisallowedFeatures disallowed_features_;
   GpuWatchdog* watchdog_;
   bool software_;
   bool handle_messages_scheduled_;
   IPC::Message* currently_processing_message_;
 
   scoped_refptr<GpuChannelMessageFilter> filter_;
   scoped_refptr<base::MessageLoopProxy> io_message_loop_;
 
   size_t num_stubs_descheduled_;
 
   bool allow_future_sync_points_;
 
   // Member variables should appear before the WeakPtrFactory, to ensure
   // that any WeakPtrs to Controller are invalidated before its members
   // variable's destructors are executed, rendering them invalid.
   base::WeakPtrFactory<GpuChannel> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuChannel);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_GPU_CHANNEL_H_