Adding class WebWavSoundResource, downloads and decode wav audio data from a URL. Implements the

experimental/life2011/life_stage_5/web_wav_sound_resource.h

Index: experimental/life2011/life_stage_5/web_wav_sound_resource.h
===================================================================
--- experimental/life2011/life_stage_5/web_wav_sound_resource.h	(revision 0)
+++ experimental/life2011/life_stage_5/web_wav_sound_resource.h	(revision 0)
@@ -0,0 +1,64 @@
+// Copyright 2011 The Native Client Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+#ifndef WEB_WAV_SOUND_RESOURCE_H_
+#define WEB_WAV_SOUND_RESOURCE_H_
+
+#include "audio_source.h"
+#include "web_resource_loader.h"
+#include <string>
+#include <vector>
+
+namespace pp {
+class Instance;
+}
+
+namespace life {
+
+class WebWavSoundResource : public AudioSource {
+ public:
+  typedef WebResourceLoader<WebWavSoundResource> Loader;
+
+  WebWavSoundResource();
+  ~WebWavSoundResource();
+
+  // Init the wav sound source by downloading audio data from the given URL.
+  // This is an asychronous call that returns immediately.
+  void Init(const std::string& url, pp::Instance* instance);
+
+  // Return whether the audio sample is ready to play.
+  bool IsReady() const { return is_ready_; }
+
+  // Get the audio data.
+  int32_t GetSampleRate() const;
+  const char* GetAudioData() const;
+  size_t GetAudioDataSize() const;
+
+  // WebResourceLoader delegate methods.
+  bool OnWebResourceLoaderCallback(Loader::DispatchOpCode op_code,
+                                   Loader* loader);
+  void OnWebResourceLoaderError(int32_t error, Loader* loader);
+  void OnWebResourceLoaderDone(Loader* loader);
+
+ private:
+  // Disallow copy and assigment.
+  WebWavSoundResource(const WebWavSoundResource&);
+  WebWavSoundResource& operator=(const WebWavSoundResource&);
+
+  // Clear (delete) all audio data.
+  void Clear();
+
+  // True ==> wav data is ready for audio playback.
+  bool is_ready_;
+  // Wav audio data, including headers.
+  std::vector<char> wav_data_;
+  size_t wav_data_size_;
+  // The actual amount of data received from the loader.
+  size_t received_data_size_;
+  // The resource loader used to stream data.
+  Loader* loader_;
+};
+
+}  // namespace life
+
+#endif  // WEB_WAV_SOUND_RESOURCE_H_