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pwavfiledev.h
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1 /*
2  * pwavfiledev.cxx
3  *
4  * Sound file device declaration
5  *
6  * Portable Windows Library
7  *
8  * Copyright (C) 2007 Post Increment
9  *
10  * The contents of this file are subject to the Mozilla Public License
11  * Version 1.0 (the "License"); you may not use this file except in
12  * compliance with the License. You may obtain a copy of the License at
13  * http://www.mozilla.org/MPL/
14  *
15  * Software distributed under the License is distributed on an "AS IS"
16  * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
17  * the License for the specific language governing rights and limitations
18  * under the License.
19  *
20  * The Original Code is Portable Windows Library.
21  *
22  * The Initial Developer of the Original Code is
23  * Robert Jongbloed <robertj@postincrement.com>
24  *
25  * All Rights Reserved.
26  *
27  * Contributor(s): ______________________________________.
28  *
29  * $Revision: 27469 $
30  * $Author: rjongbloed $
31  * $Date: 2012-04-19 05:33:35 +1000 (Thu, 19 Apr 2012) $
32  */
33 
34 #ifndef PTLIB_PWAVFILEDEV_H
35 #define PTLIB_PWAVFILEDEV_H
36 
37 #ifdef P_USE_PRAGMA
38 #pragma interface
39 #endif
40 
41 #include <ptlib.h>
42 
43 #include <ptlib/sound.h>
44 #include <ptclib/pwavfile.h>
45 #include <ptclib/delaychan.h>
46 
47 #if defined(P_WAVFILE)
48 
49 
51 //
52 // This class defines a sound channel device that reads audio from a raw WAV file
53 //
54 
55 class PSoundChannel_WAVFile : public PSoundChannel
56 {
57  PCLASSINFO(PSoundChannel_WAVFile, PSoundChannel);
58  public:
59  PSoundChannel_WAVFile();
60  PSoundChannel_WAVFile(const PString &device,
61  PSoundChannel::Directions dir,
62  unsigned numChannels,
63  unsigned sampleRate,
64  unsigned bitsPerSample);
65  ~PSoundChannel_WAVFile();
66  static PStringArray GetDeviceNames(PSoundChannel::Directions = Player);
67  PBoolean Open(
68  const PString & device,
69  Directions dir,
70  unsigned numChannels,
71  unsigned sampleRate,
72  unsigned bitsPerSample
73  );
74  virtual PString GetName() const;
75  PBoolean Close();
76  PBoolean IsOpen() const;
77  PBoolean Write(const void * buf, PINDEX len);
78  PBoolean Read(void * buf, PINDEX len);
79  PBoolean SetFormat(unsigned numChannels,
80  unsigned sampleRate,
81  unsigned bitsPerSample);
82  unsigned GetChannels() const;
83  unsigned GetSampleRate() const;
84  unsigned GetSampleSize() const;
85  PBoolean SetBuffers(PINDEX size, PINDEX count);
86  PBoolean GetBuffers(PINDEX & size, PINDEX & count);
87  PBoolean HasPlayCompleted();
88  PBoolean WaitForPlayCompletion();
89  PBoolean StartRecording();
90  PBoolean IsRecordBufferFull();
91  PBoolean AreAllRecordBuffersFull();
92  PBoolean WaitForRecordBufferFull();
93  PBoolean WaitForAllRecordBuffersFull();
94 
95 protected:
96  bool ReadSamples(void * data, PINDEX size);
97  bool ReadSample(short & data);
98 
99  PWAVFile m_WAVFile;
100  PAdaptiveDelay m_Pacing;
101  bool m_autoRepeat;
102  unsigned m_sampleRate;
103  PINDEX m_bufferSize;
104  PShortArray m_sampleBuffer;
105  PINDEX m_samplePosition;
106 };
107 
108 
109 #endif // defined(P_WAVFILE)
110 
111 #endif // PTLIB_PWAVFILEDEV_H
112 
113 
114 // End Of File ///////////////////////////////////////////////////////////////