Introduce a client minimum picture pool size

ppapi/proxy/video_decoder_resource.h

 // Copyright (c) 2014 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 PPAPI_PROXY_VIDEO_DECODER_RESOURCE_H_
 #define PPAPI_PROXY_VIDEO_DECODER_RESOURCE_H_
 
 #include <queue>
 
 #include "base/containers/hash_tables.h"
@@ skipping 30 matching lines @@
 
   // Resource overrides.
   thunk::PPB_VideoDecoder_API* AsPPB_VideoDecoder_API() override;
 
   // PPB_VideoDecoder_API implementation.
   int32_t Initialize0_1(
       PP_Resource graphics_context,
       PP_VideoProfile profile,
       PP_Bool allow_software_fallback,
       scoped_refptr<TrackedCallback> callback) override;
+  int32_t Initialize0_2(
+      PP_Resource graphics_context,
+      PP_VideoProfile profile,
+      PP_HardwareAcceleration acceleration,
+      scoped_refptr<TrackedCallback> callback) override;
   int32_t Initialize(PP_Resource graphics_context,
                      PP_VideoProfile profile,
                      PP_HardwareAcceleration acceleration,
+                     uint32_t min_picture_count,
                      scoped_refptr<TrackedCallback> callback) override;
   int32_t Decode(uint32_t decode_id,
                  uint32_t size,
                  const void* buffer,
                  scoped_refptr<TrackedCallback> callback) override;
   int32_t GetPicture0_1(
       PP_VideoPicture_0_1* picture,
       scoped_refptr<TrackedCallback> callback) override;
   int32_t GetPicture(PP_VideoPicture* picture,
                      scoped_refptr<TrackedCallback> callback) override;
@@ skipping 97 matching lines @@
   int32_t num_decodes_;
   // The maximum delay (in Decode calls) before we receive a picture. If we
   // haven't received a picture from a Decode call after this many successive
   // calls to Decode, then we will never receive a picture from the call.
   // Note that this isn't guaranteed by H264 or other codecs. In practice, this
   // number is less than 16. Make it much larger just to be safe.
   // NOTE: because we count decodes mod 2^31, this value must be a power of 2.
   static const int kMaximumPictureDelay = 128;
   uint32_t decode_ids_[kMaximumPictureDelay];
 
+  uint32_t min_picture_count_;
+
   // State for pending get_picture_callback_.
   PP_VideoPicture* get_picture_;
   PP_VideoPicture_0_1* get_picture_0_1_;
 
   ScopedPPResource graphics3d_;
   gpu::gles2::GLES2Implementation* gles2_impl_;
 
   bool initialized_;
   bool testing_;
   int32_t decoder_last_error_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoDecoderResource);
 };
 
 }  // namespace proxy
 }  // namespace ppapi
 
 #endif  // PPAPI_PROXY_VIDEO_DECODER_RESOURCE_H_