Introduce a client minimum picture pool size

content/common/gpu/media/vaapi_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.
 //
 // This file contains an implementation of VideoDecoderAccelerator
 // that utilizes hardware video decoder present on Intel CPUs.
 
 #ifndef CONTENT_COMMON_GPU_MEDIA_VAAPI_VIDEO_DECODE_ACCELERATOR_H_
 #define CONTENT_COMMON_GPU_MEDIA_VAAPI_VIDEO_DECODE_ACCELERATOR_H_
 
@@ skipping 39 matching lines @@
  public:
   class VaapiDecodeSurface;
 
   VaapiVideoDecodeAccelerator(
       const base::Callback<bool(void)>& make_context_current,
       const base::Callback<void(uint32, uint32, scoped_refptr<gfx::GLImage>)>&
           bind_image);
   ~VaapiVideoDecodeAccelerator() override;
 
   // media::VideoDecodeAccelerator implementation.
-  bool Initialize(media::VideoCodecProfile profile, Client* client) override;
+  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;
 
   static media::VideoDecodeAccelerator::SupportedProfiles
@@ skipping 221 matching lines @@
   bool finish_flush_pending_;
 
   // Decoder requested a new surface set and we are waiting for all the surfaces
   // to be returned before we can free them.
   bool awaiting_va_surfaces_recycle_;
 
   // Last requested number/resolution of output picture buffers.
   size_t requested_num_pics_;
   gfx::Size requested_pic_size_;
 
+  // The minimum picture buffer count to allocate.
+  uint32 min_picture_count_;
+
   // Binds the provided GLImage to a givenr client texture ID & texture target
   // combination in GLES.
   base::Callback<void(uint32, uint32, scoped_refptr<gfx::GLImage>)> bind_image_;
 
   // The WeakPtrFactory for |weak_this_|.
   base::WeakPtrFactory<VaapiVideoDecodeAccelerator> weak_this_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VaapiVideoDecodeAccelerator);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_MEDIA_VAAPI_VIDEO_DECODE_ACCELERATOR_H_