[WIP] Proxy RtcVideoDecoder calls to a media::VideoDecoder.

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 <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 168 matching lines @@
 std::string FFmpegVideoDecoder::GetDisplayName() const {
   return "FFmpegVideoDecoder";
 }
 
 void FFmpegVideoDecoder::Initialize(const VideoDecoderConfig& config,
                                     bool low_delay,
                                     CdmContext* /* cdm_context */,
                                     const InitCB& init_cb,
                                     const OutputCB& output_cb) {
   DCHECK(thread_checker_.CalledOnValidThread());
-  DCHECK(config.IsValidConfig());
+  DCHECK(config.IsValidConfig()) << config.AsHumanReadableString();
   DCHECK(!output_cb.is_null());
 
   InitCB bound_init_cb = BindToCurrentLoop(init_cb);
 
   if (config.is_encrypted()) {
     bound_init_cb.Run(false);
     return;
   }
 
   FFmpegGlue::InitializeFFmpeg();
   config_ = config;
 
   // TODO(xhwang): Only set |config_| after we successfully configure the
   // decoder.
   if (!ConfigureDecoder(low_delay)) {
     bound_init_cb.Run(false);
     return;
   }
 
   output_cb_ = output_cb;
 
   // Success!
   state_ = kNormal;
   bound_init_cb.Run(true);
 }
 
 void FFmpegVideoDecoder::Decode(const scoped_refptr<DecoderBuffer>& buffer,
                                 const DecodeCB& decode_cb) {
+  VLOG(0) << __FUNCTION__;
   DCHECK(thread_checker_.CalledOnValidThread());
   DCHECK(buffer.get());
   DCHECK(!decode_cb.is_null());
   CHECK_NE(state_, kUninitialized);
 
   DecodeCB decode_cb_bound = BindToCurrentLoop(decode_cb);
 
   if (state_ == kError) {
     decode_cb_bound.Run(DecodeStatus::DECODE_ERROR);
     return;
@@ skipping 158 matching lines @@
   if (!codec || avcodec_open2(codec_context_.get(), codec, NULL) < 0) {
     ReleaseFFmpegResources();
     return false;
   }
 
   av_frame_.reset(av_frame_alloc());
   return true;
 }
 
 }  // namespace media