Created VideoFramePool to avoid unnecessary VideoFrame alloc/free.

media/filters/ffmpeg_video_decoder.cc

 // 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.
 
 #include "media/filters/ffmpeg_video_decoder.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/bind.h"
@@ skipping 74 matching lines @@
                                   codec_context->sample_aspect_ratio.num,
                                   codec_context->sample_aspect_ratio.den);
   } else {
     natural_size = config_.natural_size();
   }
 
   if (!VideoFrame::IsValidConfig(format, size, gfx::Rect(size), natural_size))
     return AVERROR(EINVAL);
 
   scoped_refptr<VideoFrame> video_frame =
-      VideoFrame::CreateFrame(format, size, gfx::Rect(size), natural_size,
-                              kNoTimestamp());
+      frame_pool_.CreateFrame(format, size, gfx::Rect(size),
+                              natural_size, kNoTimestamp());
 
   for (int i = 0; i < 3; i++) {
     frame->base[i] = video_frame->data(i);
     frame->data[i] = video_frame->data(i);
     frame->linesize[i] = video_frame->stride(i);
   }
 
   frame->opaque = NULL;
   video_frame.swap(reinterpret_cast<VideoFrame**>(&frame->opaque));
   frame->type = FF_BUFFER_TYPE_USER;
@@ skipping 273 matching lines @@
   if (!codec || avcodec_open2(codec_context_.get(), codec, NULL) < 0) {
     ReleaseFFmpegResources();
     return false;
   }
 
   av_frame_.reset(avcodec_alloc_frame());
   return true;
 }
 
 }  // namespace media