Jack2  1.9.9
TiPhoneCoreAudioRenderer.h
1 /*
2 Copyright (C) 2010 Grame
3 
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
8 
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13 
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 
18 */
19 
20 #ifndef __TiPhoneCoreAudioRenderer__
21 #define __TiPhoneCoreAudioRenderer__
22 
23 #include <AudioToolbox/AudioConverter.h>
24 #include <AudioToolbox/AudioServices.h>
25 #include <AudioUnit/AudioUnit.h>
26 
27 #define MAX_CHANNELS 256
28 #define OPEN_ERR -1
29 #define NO_ERR 0
30 
31 typedef void (*AudioCallback) (int frames, float** inputs, float** outputs, void* arg);
32 
34 {
35 
36  private:
37 
38  AudioUnit fAUHAL;
39  AudioCallback fAudioCallback;
40  void* fCallbackArg;
41 
42  int fDevNumInChans;
43  int fDevNumOutChans;
44 
45  AudioBufferList* fCAInputData;
46 
47  float* fInChannel[MAX_CHANNELS];
48  float* fOutChannel[MAX_CHANNELS];
49 
50  static OSStatus Render(void *inRefCon,
51  AudioUnitRenderActionFlags *ioActionFlags,
52  const AudioTimeStamp *inTimeStamp,
53  UInt32 inBusNumber,
54  UInt32 inNumberFrames,
55  AudioBufferList *ioData);
56 
57  static void InterruptionListener(void *inClientData, UInt32 inInterruption);
58 
59  public:
60 
61  TiPhoneCoreAudioRenderer(int input, int output)
62  :fAudioCallback(NULL), fCallbackArg(NULL), fDevNumInChans(input), fDevNumOutChans(output), fCAInputData(NULL)
63  {
64  memset(fInChannel, 0, sizeof(float*) * MAX_CHANNELS);
65  memset(fOutChannel, 0, sizeof(float*) * MAX_CHANNELS);
66 
67  for (int i = 0; i < fDevNumInChans; i++) {
68  fInChannel[i] = new float[8192];
69  }
70 
71  for (int i = 0; i < fDevNumOutChans; i++) {
72  fOutChannel[i] = new float[8192];
73  }
74  }
75 
76  virtual ~TiPhoneCoreAudioRenderer()
77  {
78  for (int i = 0; i < fDevNumInChans; i++) {
79  delete[] fInChannel[i];
80  }
81 
82  for (int i = 0; i < fDevNumOutChans; i++) {
83  delete[] fOutChannel[i];
84  }
85 
86  if (fCAInputData) {
87  for (int i = 0; i < fDevNumInChans; i++) {
88  free(fCAInputData->mBuffers[i].mData);
89  }
90  free(fCAInputData);
91  }
92  }
93 
94  int Open(int bufferSize, int sampleRate);
95  int Close();
96 
97  int Start();
98  int Stop();
99 
100  void SetAudioCallback(AudioCallback callback, void* arg)
101  {
102  fAudioCallback = callback;
103  fCallbackArg = arg;
104  }
105 
106  void PerformAudioCallback(int frames)
107  {
108  if (fAudioCallback) {
109  fAudioCallback(frames, fInChannel, fOutChannel, fCallbackArg);
110  }
111  }
112 
113 };
114 
116 
117 #endif