Support multiple video decoders and encoders

content/common/gpu/media/gpu_video_encode_accelerator.h

 // Copyright 2013 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_MEDIA_GPU_VIDEO_ENCODE_ACCELERATOR_H_
 #define CONTENT_COMMON_GPU_MEDIA_GPU_VIDEO_ENCODE_ACCELERATOR_H_
 
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 42 matching lines @@
                             size_t payload_size,
                             bool key_frame) override;
   void NotifyError(media::VideoEncodeAccelerator::Error error) override;
 
   // GpuCommandBufferStub::DestructionObserver implementation.
   void OnWillDestroyStub() override;
 
   // Static query for supported profiles.  This query calls the appropriate
   // platform-specific version.
   static std::vector<gpu::VideoEncodeAcceleratorSupportedProfile>
-  GetSupportedProfiles();
+      GetSupportedProfiles();
   static std::vector<gpu::VideoEncodeAcceleratorSupportedProfile>
-  ConvertMediaToGpuProfiles(const std::vector<
-      media::VideoEncodeAccelerator::SupportedProfile>& media_profiles);
+      ConvertMediaToGpuProfiles(const std::vector<
+          media::VideoEncodeAccelerator::SupportedProfile>& media_profiles);
 
  private:
-  // Create the appropriate platform-specific VEA.
-  static scoped_ptr<media::VideoEncodeAccelerator> CreateEncoder();
+  typedef base::Callback<scoped_ptr<media::VideoEncodeAccelerator>(void)>
+      CreateVEACb;
+
+  // Return a set of VEA Create callback functions applicable to the current
+  // platform.
+  static std::vector<CreateVEACb> CreateVEACbs();
+  static scoped_ptr<media::VideoEncodeAccelerator> CreateV4L2VEA();
+  static scoped_ptr<media::VideoEncodeAccelerator> CreateVaapiVEA();
+  static scoped_ptr<media::VideoEncodeAccelerator> CreateAndroidVEA();
 
   // IPC handlers, proxying media::VideoEncodeAccelerator for the renderer
   // process.
   void OnEncode(int32 frame_id,
                 base::SharedMemoryHandle buffer_handle,
                 uint32 buffer_size,
                 bool force_keyframe);
   void OnUseOutputBitstreamBuffer(int32 buffer_id,
                                   base::SharedMemoryHandle buffer_handle,
                                   uint32 buffer_size);
@@ skipping 27 matching lines @@
 
   // Weak pointer for media::VideoFrames that refer back to |this|.
   base::WeakPtrFactory<GpuVideoEncodeAccelerator> weak_this_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuVideoEncodeAccelerator);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_MEDIA_GPU_VIDEO_ENCODE_ACCELERATOR_H_