audio_osx_source.h

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00001 /* -*- c++ -*- */
00002 /*
00003  * Copyright 2006 Free Software Foundation, Inc.
00004  * 
00005  * This file is part of GNU Radio.
00006  *
00007  * GNU Radio is free software; you can redistribute it and/or modify
00008  * it under the terms of the GNU General Public License as published by
00009  * the Free Software Foundation; either version 3, or (at your option)
00010  * any later version.
00011  * 
00012  * GNU Radio is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  * GNU General Public License for more details.
00016  * 
00017  * You should have received a copy of the GNU General Public License
00018  * along with GNU Radio; see the file COPYING.  If not, write to
00019  * the Free Software Foundation, Inc., 51 Franklin Street,
00020  * Boston, MA 02110-1301, USA.
00021  */
00022 
00023 #ifndef INCLUDED_AUDIO_OSX_SOURCE_H
00024 #define INCLUDED_AUDIO_OSX_SOURCE_H
00025 
00026 #include <gr_sync_block.h>
00027 #include <string>
00028 #include <AudioToolbox/AudioToolbox.h>
00029 #include <AudioUnit/AudioUnit.h>
00030 #include <circular_buffer.h>
00031 
00032 class audio_osx_source;
00033 typedef boost::shared_ptr<audio_osx_source> audio_osx_source_sptr;
00034 
00035 audio_osx_source_sptr
00036 audio_osx_make_source (int sample_rate = 44100,
00037                        const std::string device_name = "",
00038                        bool do_block = true,
00039                        int channel_config = -1,
00040                        int max_sample_count = -1);
00041 
00049 class audio_osx_source : public gr_sync_block {
00050   friend audio_osx_source_sptr
00051   audio_osx_make_source (int sample_rate,
00052                          const std::string device_name,
00053                          bool do_block,
00054                          int channel_config,
00055                          int max_sample_count);
00056 
00057   Float64             d_deviceSampleRate, d_outputSampleRate;
00058   int                 d_channel_config;
00059   UInt32              d_inputBufferSizeFrames, d_inputBufferSizeBytes;
00060   UInt32              d_outputBufferSizeFrames, d_outputBufferSizeBytes;
00061   UInt32              d_deviceBufferSizeFrames, d_deviceBufferSizeBytes;
00062   UInt32              d_leadSizeFrames, d_leadSizeBytes;
00063   UInt32              d_trailSizeFrames, d_trailSizeBytes;
00064   UInt32              d_extraBufferSizeFrames, d_extraBufferSizeBytes;
00065   UInt32              d_queueSampleCount, d_max_sample_count;
00066   UInt32              d_n_AvailableInputFrames, d_n_ActualInputFrames;
00067   UInt32              d_n_user_channels, d_n_max_channels, d_n_deviceChannels;
00068   bool                d_do_block, d_passThrough, d_waiting_for_data;
00069   mld_mutex_ptr       d_internal;
00070   mld_condition_ptr   d_cond_data;
00071   circular_buffer<float>** d_buffers;
00072 
00073 // AudioUnits and Such
00074   AudioUnit           d_InputAU;
00075   AudioBufferList*    d_InputBuffer;
00076   AudioBufferList*    d_OutputBuffer;
00077   AudioConverterRef   d_AudioConverter;
00078 
00079 protected:
00080   audio_osx_source (int sample_rate = 44100,
00081                     const std::string device_name = "",
00082                     bool do_block = true,
00083                     int channel_config = -1,
00084                     int max_sample_count = -1);
00085 
00086 public:
00087   ~audio_osx_source ();
00088 
00089   bool start ();
00090   bool stop ();
00091   bool IsRunning ();
00092 
00093   bool check_topology (int ninputs, int noutputs);
00094 
00095   int work (int noutput_items,
00096             gr_vector_const_void_star &input_items,
00097             gr_vector_void_star &output_items);
00098 
00099 private:
00100   void SetDefaultInputDeviceAsCurrent ();
00101 
00102   void AllocAudioBufferList (AudioBufferList** t_ABL,
00103                              UInt32 n_channels,
00104                              UInt32 inputBufferSizeBytes);
00105 
00106   void FreeAudioBufferList (AudioBufferList** t_ABL);
00107 
00108   static OSStatus ConverterCallback (AudioConverterRef inAudioConverter,
00109                                      UInt32* ioNumberDataPackets,
00110                                      AudioBufferList* ioData,
00111                                      AudioStreamPacketDescription** outASPD,
00112                                      void* inUserData);
00113 
00114   static OSStatus AUInputCallback (void *inRefCon,
00115                                    AudioUnitRenderActionFlags *ioActionFlags,
00116                                    const AudioTimeStamp *inTimeStamp,
00117                                    UInt32 inBusNumber,
00118                                    UInt32 inNumberFrames,
00119                                    AudioBufferList *ioData);
00120 #if _OSX_DO_LISTENERS_
00121   static OSStatus UnitListener (void *inRefCon,
00122                                 AudioUnit ci,
00123                                 AudioUnitPropertyID inID,
00124                                 AudioUnitScope inScope,
00125                                 AudioUnitElement inElement);
00126 
00127   static OSStatus HardwareListener (AudioHardwarePropertyID inPropertyID, 
00128                                     void *inClientData);
00129 #endif
00130 };
00131 
00132 #endif /* INCLUDED_AUDIO_OSX_SOURCE_H */

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