CLAM-Development  1.4.0
MpegAudioStream.hxx
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2004 MUSIC TECHNOLOGY GROUP (MTG)
3  * UNIVERSITAT POMPEU FABRA
4  *
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19  *
20  */
21 
22 #ifndef __MpegAudioStream__
23 #define __MpegAudioStream__
24 
25 
26 #include "AudioCodecs_Stream.hxx"
27 #include "MpegBitstream.hxx"
28 #include <deque>
29 #include <string>
30 
31 namespace CLAM
32 {
33 
34 namespace AudioCodecs
35 {
36  class MpegAudioStream : public Stream
37  {
38  public:
39  MpegAudioStream( const AudioFile& file );
41 
42  void PrepareReading();
43  void PrepareWriting();
44  void Dispose();
45  void SeekTo(unsigned long framePosition);
46 
47  protected:
48  void DiskToMemoryTransfer();
49  void MemoryToDiskTransfer();
50 
51  private:
52  void ConsumeDecodedSamples();
53 
54  private:
55  std::string mName;
56  FILE* mpHandle;
57  MpegBitstream mBitstream;
58  int mEncodedSampleRate;
59  unsigned _mp3Frame;
60 
61  static const TSize mMaxDecodedBlockSize;
62  std::vector<std::deque<mad_fixed_t> > mDecodeBuffer;
63  TSize mSamplesDecoded;
64  std::vector<unsigned long> _seekCache;
65  };
66 }
67 
68 }
69 
70 
71 #endif // MpegAudioStream.hxx
72