Improve input handling for WaveAudioHandler.

media/audio/sounds/audio_stream_handler.cc

 // Copyright 2013 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/audio/sounds/audio_stream_handler.h"
 
 #include <string>
 
 #include "base/cancelable_callback.h"
 #include "base/logging.h"
@@ skipping 146 matching lines @@
 };
 
 AudioStreamHandler::AudioStreamHandler(const base::StringPiece& wav_data)
     : wav_audio_(wav_data),
       initialized_(false) {
   AudioManager* manager = AudioManager::Get();
   if (!manager) {
     LOG(ERROR) << "Can't get access to audio manager.";
     return;
   }
+
+  if (!wav_audio_.is_valid()) {
+    LOG(ERROR) << "wav_audio handler is not valid";
+    return;
+  }
+
   const AudioParameters params(
       AudioParameters::AUDIO_PCM_LOW_LATENCY,
       GuessChannelLayout(wav_audio_.num_channels()), wav_audio_.sample_rate(),
       wav_audio_.bits_per_sample(), kDefaultFrameCount);
   if (!params.IsValid()) {
     LOG(ERROR) << "Audio params are invalid.";
     return;
   }
   stream_.reset(new AudioStreamContainer(wav_audio_));
   initialized_ = true;
@@ skipping 38 matching lines @@
   g_observer_for_testing = observer;
 }
 
 // static
 void AudioStreamHandler::SetAudioSourceForTesting(
     AudioOutputStream::AudioSourceCallback* source) {
   g_audio_source_for_testing = source;
 }
 
 }  // namespace media