Plumb decoded video pixel format from GPU process to renderer.

media/gpu/ipc/client/gpu_video_decode_accelerator_host.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 MEDIA_GPU_IPC_CLIENT_GPU_VIDEO_DECODE_ACCELERATOR_HOST_H_
 #define MEDIA_GPU_IPC_CLIENT_GPU_VIDEO_DECODE_ACCELERATOR_HOST_H_
 
 #include <stdint.h>
 
 #include <vector>
@@ skipping 29 matching lines @@
 
   // VideoDecodeAccelerator implementation.
   bool Initialize(const Config& config, Client* client) override;
   void SetCdm(int cdm_id) override;
   void Decode(const BitstreamBuffer& bitstream_buffer) override;
   void AssignPictureBuffers(const std::vector<PictureBuffer>& buffers) override;
   void ReusePictureBuffer(int32_t picture_buffer_id) override;
   void Flush() override;
   void Reset() override;
   void Destroy() override;
+  VideoPixelFormat GetOutputFormat() const override;
 
   // gpu::CommandBufferProxyImpl::DeletionObserver implemetnation.
   void OnWillDeleteImpl() override;
 
  private:
   // Only Destroy() should be deleting |this|.
   ~GpuVideoDecodeAcceleratorHost() override;
 
   // Notify |client_| of an error.  Posts a task to avoid re-entrancy.
   void PostNotifyError(Error);
 
   void Send(IPC::Message* message);
 
   // IPC handlers, proxying VideoDecodeAccelerator::Client for the GPU
   // process.  Should not be called directly.
   void OnInitializationComplete(bool success);
   void OnBitstreamBufferProcessed(int32_t bitstream_buffer_id);
-  void OnProvidePictureBuffer(uint32_t num_requested_buffers,
+  void OnProvidePictureBuffer(VideoPixelFormat format,
+                              uint32_t num_requested_buffers,
                               uint32_t textures_per_buffer,
                               const gfx::Size& dimensions,
                               uint32_t texture_target);
   void OnDismissPictureBuffer(int32_t picture_buffer_id);
   void OnPictureReady(int32_t picture_buffer_id,
                       int32_t bitstream_buffer_id,
                       const gfx::Rect& visible_rect,
                       bool allow_overlay,
                       bool size_changed);
   void OnFlushDone();
   void OnResetDone();
   void OnNotifyError(uint32_t error);
 
   scoped_refptr<gpu::GpuChannelHost> channel_;
 
   // Route ID for the associated decoder in the GPU process.
   int32_t decoder_route_id_;
 
   // The client that will receive callbacks from the decoder.
   Client* client_;
 
   // Unowned reference to the gpu::CommandBufferProxyImpl that created us.
   // |this| registers as a DeletionObserver of |impl_|, the so reference is
   // always valid as long as it is not NULL.
   gpu::CommandBufferProxyImpl* impl_;
 
   // Requested dimensions of the buffer, from ProvidePictureBuffers().
   gfx::Size picture_buffer_dimensions_;
 
+  VideoPixelFormat picture_buffer_format_;

[miu, 2016/05/12 20:03:02]

This should have default initialization (PIXEL_FORMAT_UNKNOWN in ctor
initializer list?).

+
   // WeakPtr factory for posting tasks back to itself.
   base::WeakPtrFactory<GpuVideoDecodeAcceleratorHost> weak_this_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuVideoDecodeAcceleratorHost);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_GPU_IPC_CLIENT_GPU_VIDEO_DECODE_ACCELERATOR_HOST_H_