Introduce AudioRendererAlgorithmBase::VerifyConfig.

media/filters/audio_renderer_base.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/audio_renderer_base.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/bind.h"
@@ skipping 95 matching lines @@
 
   // Construct the algorithm.
   algorithm_.reset(new AudioRendererAlgorithmBase());
 
   // Initialize our algorithm with media properties, initial playback rate,
   // and a callback to request more reads from the data source.
   ChannelLayout channel_layout = decoder_->channel_layout();
   int channels = ChannelLayoutToChannelCount(channel_layout);
   int bits_per_channel = decoder_->bits_per_channel();
   int sample_rate = decoder_->samples_per_second();
-  algorithm_->Initialize(channels, sample_rate, bits_per_channel, 0.0f, cb);
+
+  bool config_ok = algorithm_->VerifyConfig(channels, sample_rate,
+                                            bits_per_channel, 0.0f);
+  if (config_ok)
+    algorithm_->Initialize(channels, sample_rate, bits_per_channel, 0.0f, cb);
 
   // Give the subclass an opportunity to initialize itself.
-  if (!OnInitialize(bits_per_channel, channel_layout, sample_rate)) {
+  if (!config_ok || !OnInitialize(bits_per_channel, channel_layout,
+                                  sample_rate)) {
     init_callback.Run(PIPELINE_ERROR_INITIALIZATION_FAILED);
     return;
   }
 
   // Finally, execute the start callback.
   state_ = kPaused;
   init_callback.Run(PIPELINE_OK);
 }
 
 bool AudioRendererBase::HasEnded() {
@@ skipping 166 matching lines @@
   base::AutoLock auto_lock(lock_);
   return algorithm_->playback_rate();
 }
 
 bool AudioRendererBase::IsBeforeSeekTime(const scoped_refptr<Buffer>& buffer) {
   return (state_ == kSeeking) && buffer && !buffer->IsEndOfStream() &&
       (buffer->GetTimestamp() + buffer->GetDuration()) < seek_timestamp_;
 }
 
 }  // namespace media