MJPEG acceleration for video capture using VAAPI

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 df2fd54576521d13adc53814647c3c37c1b8968d..9371e828d40f1bb7da039d7bd8b3f8e669be862d 100644
--- a/content/common/gpu/gpu_channel.h
+++ b/content/common/gpu/gpu_channel.h
@@ -18,6 +18,7 @@
 #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"
@@ -169,6 +170,8 @@ class GpuChannel : public IPC::Listener, public IPC::Sender,
     return pending_valuebuffer_state_.get();
   }
 
+  void ReleaseJpegDecoder();
+
  private:
   friend class GpuChannelMessageFilter;
 
@@ -185,6 +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();
@@ -230,6 +234,8 @@ class GpuChannel : public IPC::Listener, public IPC::Sender,
   typedef IDMap<GpuCommandBufferStub, IDMapOwnPointer> StubMap;
   StubMap stubs_;
 
+  scoped_ptr<content::GpuJpegDecodeAccelerator> jpeg_decoder_;

[wuchengli, 2015/04/15 07:11:57]

Need a way to support multiple jpeg decoders here. Does ScopedPtrHashMap work?

[kcwu, 2015/04/23 13:00:18]

Done.
ScopedPtrHashMap need to support custom deleter.
scoped_ptr_hash_map.h is under review here
https://codereview.chromium.org/1099383002/

I will rebase once it committed.

+
   bool log_messages_;  // True if we should log sent and received messages.
   gpu::gles2::DisallowedFeatures disallowed_features_;
   GpuWatchdog* watchdog_;