MJPEG acceleration for video capture using VAAPI, the GPU and IPC part

content/common/gpu/gpu_channel.h

Index: content/common/gpu/gpu_channel.h
diff --git a/content/common/gpu/gpu_channel.h b/content/common/gpu/gpu_channel.h
index 710b31ab285b3dd01235faefacaab6c8f3561572..6f59c13e5f6ce4f14090dbe047c3ffb8b654a35c 100644
--- a/content/common/gpu/gpu_channel.h
+++ b/content/common/gpu/gpu_channel.h
@@ -8,6 +8,7 @@
 #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"
@@ -18,6 +19,7 @@
 #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"
@@ -168,6 +170,8 @@ class GpuChannel : public IPC::Listener, public IPC::Sender,
     return pending_valuebuffer_state_.get();
   }
 
+  void ReleaseJpegDecoder(int32 route_id);
+
  private:
   friend class GpuChannelMessageFilter;
 
@@ -184,6 +188,7 @@ class GpuChannel : public IPC::Listener, public IPC::Sender,
       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();
@@ -229,6 +234,10 @@ class GpuChannel : public IPC::Listener, public IPC::Sender,
   typedef IDMap<GpuCommandBufferStub, IDMapOwnPointer> StubMap;
   StubMap stubs_;
 
+  // A map from route id to Jpeg decoder.
+  base::ScopedPtrHashMap<int32, scoped_ptr<content::GpuJpegDecodeAccelerator>>
+      jpeg_decoder_map_;
+
   bool log_messages_;  // True if we should log sent and received messages.
   gpu::gles2::DisallowedFeatures disallowed_features_;
   GpuWatchdog* watchdog_;