Added volume adjust sound behind the flag.

media/audio/sounds/wav_parser.h

 // 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.
 
-#ifndef MEDIA_AUDIO_SOUNDS_WAV_AUDIO_HANDLER_H_
-#define MEDIA_AUDIO_SOUNDS_WAV_AUDIO_HANDLER_H_
+#ifndef MEDIA_AUDIO_SOUNDS_WAV_PARSER_H_
+#define MEDIA_AUDIO_SOUNDS_WAV_PARSER_H_
 
 #include "base/strings/string_piece.h"
+#include "base/time/time.h"
 #include "media/base/media_export.h"
 
 namespace media {
 
-class AudioBus;
-
 // This class provides the input from wav file format.  See
 // https://ccrma.stanford.edu/courses/422/projects/WaveFormat/
-class MEDIA_EXPORT WavAudioHandler {
+class MEDIA_EXPORT WavParser {
  public:
-  explicit WavAudioHandler(const base::StringPiece& wav_data);
-  virtual ~WavAudioHandler();
+  explicit WavParser(const base::StringPiece& wav_data);
+  virtual ~WavParser();
 
-  // Returns true when cursor points to the end of the track.
-  bool AtEnd(size_t cursor) const;
-
-  // Copies the audio data to |bus| starting from the |cursor| and in
-  // the case of success stores the number of written bytes in
-  // |bytes_written|. |bytes_written| should not be NULL.
-  bool CopyTo(AudioBus* bus, size_t cursor, size_t* bytes_written) const;
-
-  int size() const { return data_.size(); }
   uint16 num_channels() const { return num_channels_; }

[DaleCurtis, 2013/12/17 19:28:52]

At this point it'd just be easier to expose an audio_parameters() method which
holds these values and returns a const AudioParameters&.

[ygorshenin1, 2013/12/18 14:33:12]

Done.

   uint32 sample_rate() const { return sample_rate_; }
   uint32 byte_rate() const { return byte_rate_; }
   uint16 bits_per_sample() const { return bits_per_sample_; }
+  int bytes_per_sample() const { return bytes_per_sample_; }
+  int bytes_per_frame() const { return bytes_per_frame_; }
+  const base::TimeDelta& duration() const { return duration_; }
+  const base::StringPiece& data() const { return data_; }
 
  private:
   // Parses a chunk of wav format data. Returns the length of the chunk.
   int ParseSubChunk(const base::StringPiece& data);
 
   // Parses the 'fmt' section chunk and stores |params_|.
   bool ParseFmtChunk(const base::StringPiece& data);
 
   // Parses the 'data' section chunk and stores |data_|.
   bool ParseDataChunk(const base::StringPiece& data);
 
   // Data part of the |wav_data_|.
   base::StringPiece data_;
 
   uint16 num_channels_;
   uint32 sample_rate_;
   uint32 byte_rate_;
   uint16 bits_per_sample_;
   int bytes_per_sample_;
   int bytes_per_frame_;
+  base::TimeDelta duration_;
 };
 
 }  // namespace media
 
-#endif  // MEDIA_AUDIO_SOUNDS_WAV_AUDIO_HANDLER_H_
+#endif  // MEDIA_AUDIO_SOUNDS_WAV_PARSER_H_