Allow ffmpeg to process individual NALU rather than require frames.

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 339 matching lines @@
   ReleaseFFmpegResources();
 
   // Initialize AVCodecContext structure.
   codec_context_.reset(avcodec_alloc_context3(NULL));
   VideoDecoderConfigToAVCodecContext(config_, codec_context_.get());
 
   codec_context_->thread_count = GetThreadCount(codec_context_->codec_id);
   codec_context_->thread_type = low_delay ? FF_THREAD_SLICE : FF_THREAD_FRAME;
   codec_context_->opaque = this;
   codec_context_->flags |= CODEC_FLAG_EMU_EDGE;
+  codec_context_->flags2 |= CODEC_FLAG2_CHUNKS;

[DaleCurtis, 2014/05/30 17:49:06]

This will disable frame threading for all clients which I don't think we want to
do since it will likely hurt performance significantly.

https://code.google.com/p/chromium/codesearch#chromium/src/third_party/ffmpeg...

   codec_context_->get_buffer2 = GetVideoBufferImpl;
   codec_context_->refcounted_frames = 1;
 
   AVCodec* codec = avcodec_find_decoder(codec_context_->codec_id);
   if (!codec || avcodec_open2(codec_context_.get(), codec, NULL) < 0) {
     ReleaseFFmpegResources();
     return false;
   }
 
   av_frame_.reset(av_frame_alloc());
   return true;
 }
 
 }  // namespace media