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   1 /* -*- c++ -*- */
   2 /*
   3  * Copyright 2006 Free Software Foundation, Inc.
   4  *
   5  * This file is part of GNU Radio.
   6  *
   7  * GNU Radio is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2, or (at your option)
  10  * any later version.
  11  *
  12  * GNU Radio is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with GNU Radio; see the file COPYING.  If not, write to
  19  * the Free Software Foundation, Inc., 51 Franklin Street,
  20  * Boston, MA 02110-1301, USA.
  21  */
  22
  23 #ifndef INCLUDED_AUDIO_OSX_SOURCE_H
  24 #define INCLUDED_AUDIO_OSX_SOURCE_H
  25
  26 #include <gr_sync_block.h>
  27 #include <string>
  28 #include <AudioToolbox/AudioToolbox.h>
  29 #include <AudioUnit/AudioUnit.h>
  30 #include <circular_buffer.h>
  31
  32 class audio_osx_source;
  33 typedef boost::shared_ptr<audio_osx_source> audio_osx_source_sptr;
  34
  35 audio_osx_source_sptr
  36 audio_osx_make_source (int sample_rate = 44100,
  37                        const std::string device_name = "",
  38                        bool do_block = true,
  39                        int channel_config = -1,
  40                        int max_sample_count = -1);
  41
  42 /*!
  43  * \brief audio source using OSX
  44  *
  45  * Input signature is one or two streams of floats.
  46  * Samples must be in the range [-1,1].
  47  */
  48
  49 class audio_osx_source : public gr_sync_block {
  50   friend audio_osx_source_sptr
  51   audio_osx_make_source (int sample_rate,
  52                          const std::string device_name,
  53                          bool do_block,
  54                          int channel_config,
  55                          int max_sample_count);
  56
  57   Float64             d_deviceSampleRate, d_outputSampleRate;
  58   int                 d_channel_config;
  59   UInt32              d_inputBufferSizeFrames, d_inputBufferSizeBytes;
  60   UInt32              d_outputBufferSizeFrames, d_outputBufferSizeBytes;
  61   UInt32              d_deviceBufferSizeFrames, d_deviceBufferSizeBytes;
  62   UInt32              d_leadSizeFrames, d_leadSizeBytes;
  63   UInt32              d_trailSizeFrames, d_trailSizeBytes;
  64   UInt32              d_extraBufferSizeFrames, d_extraBufferSizeBytes;
  65   UInt32              d_queueSampleCount, d_max_sample_count;
  66   UInt32              d_n_AvailableInputFrames, d_n_ActualInputFrames;
  67   UInt32              d_n_user_channels, d_n_max_channels, d_n_deviceChannels;
  68   bool                d_do_block, d_passThrough, d_waiting_for_data;
  69   mld_mutex_ptr       d_internal;
  70   mld_condition_ptr   d_cond_data;
  71   circular_buffer<float>** d_buffers;
  72
  73 // AudioUnits and Such
  74   AudioUnit           d_InputAU;
  75   AudioBufferList*    d_InputBuffer;
  76   AudioBufferList*    d_OutputBuffer;
  77   AudioConverterRef   d_AudioConverter;
  78
  79 protected:
  80   audio_osx_source (int sample_rate = 44100,
  81                     const std::string device_name = "",
  82                     bool do_block = true,
  83                     int channel_config = -1,
  84                     int max_sample_count = -1);
  85
  86 public:
  87   ~audio_osx_source ();
  88
  89   bool start ();
  90   bool stop ();
  91   bool IsRunning ();
  92
  93   bool check_topology (int ninputs, int noutputs);
  94
  95   int work (int noutput_items,
  96             gr_vector_const_void_star &input_items,
  97             gr_vector_void_star &output_items);
  98
  99 private:
 100   void SetDefaultInputDeviceAsCurrent ();
 101
 102   void AllocAudioBufferList (AudioBufferList** t_ABL,
 103                              UInt32 n_channels,
 104                              UInt32 inputBufferSizeBytes);
 105
 106   void FreeAudioBufferList (AudioBufferList** t_ABL);
 107
 108   static OSStatus ConverterCallback (AudioConverterRef inAudioConverter,
 109                                      UInt32* ioNumberDataPackets,
 110                                      AudioBufferList* ioData,
 111                                      AudioStreamPacketDescription** outASPD,
 112                                      void* inUserData);
 113
 114   static OSStatus AUInputCallback (void *inRefCon,
 115                                    AudioUnitRenderActionFlags *ioActionFlags,
 116                                    const AudioTimeStamp *inTimeStamp,
 117                                    UInt32 inBusNumber,
 118                                    UInt32 inNumberFrames,
 119                                    AudioBufferList *ioData);
 120 #if _OSX_DO_LISTENERS_
 121   static OSStatus UnitListener (void *inRefCon,
 122                                 AudioUnit ci,
 123                                 AudioUnitPropertyID inID,
 124                                 AudioUnitScope inScope,
 125                                 AudioUnitElement inElement);
 126
 127   static OSStatus HardwareListener (AudioHardwarePropertyID inPropertyID,
 128                                     void *inClientData);
 129 #endif
 130 };
 131
 132 #endif /* INCLUDED_AUDIO_OSX_SOURCE_H */