Introduce a client minimum picture pool size

content/common/gpu/media/dxva_video_decode_accelerator.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_MEDIA_DXVA_VIDEO_DECODE_ACCELERATOR_H_
 #define CONTENT_COMMON_GPU_MEDIA_DXVA_VIDEO_DECODE_ACCELERATOR_H_
 
 #include <d3d11.h>
 #include <d3d9.h>
 // Work around bug in this header by disabling the relevant warning for it.
@@ skipping 46 matching lines @@
   };
 
   // Does not take ownership of |client| which must outlive |*this|.
   explicit DXVAVideoDecodeAccelerator(
       const base::Callback<bool(void)>& make_context_current,
       gfx::GLContext* gl_context);
   ~DXVAVideoDecodeAccelerator() override;
 
   // media::VideoDecodeAccelerator implementation.
   bool Initialize(media::VideoCodecProfile profile,
+                  uint32 min_picture_count,
                   Client* client) override;
   void Decode(const media::BitstreamBuffer& bitstream_buffer) override;
   void AssignPictureBuffers(
       const std::vector<media::PictureBuffer>& buffers) override;
   void ReusePictureBuffer(int32 picture_buffer_id) override;
   void Flush() override;
   void Reset() override;
   void Destroy() override;
   bool CanDecodeOnIOThread() override;
   GLenum GetSurfaceInternalFormat() const override;
@@ skipping 224 matching lines @@
   // This map maintains the picture buffers passed the client for decoding.
   // The key is the picture buffer id.
   OutputBuffers output_picture_buffers_;
 
   // After a resolution change there may be a few output buffers which have yet
   // to be displayed so they cannot be dismissed immediately. We move them from
   // |output_picture_buffers_| to this map so they may be dismissed once they
   // become available.
   OutputBuffers stale_output_picture_buffers_;
 
+  // The number of picture buffers to allocate
+  uint32 num_picture_buffers_;
+
   // Set to true if we requested picture slots from the client.
   bool pictures_requested_;
 
   // Counter which holds the number of input packets before a successful
   // decode.
   int inputs_before_decode_;
 
   // Set to true when the drain message is sent to the decoder during a flush
   // operation. Used to ensure the message is only sent once after
   // |pending_input_buffers_| is drained. Protected by |decoder_lock_|.
@@ skipping 46 matching lines @@
   // WeakPtrFactory for posting tasks back to |this|.
   base::WeakPtrFactory<DXVAVideoDecodeAccelerator> weak_this_factory_;
 
   // Function pointer for the MFCreateDXGIDeviceManager API.
   static CreateDXGIDeviceManager create_dxgi_device_manager_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_MEDIA_DXVA_VIDEO_DECODE_ACCELERATOR_H_