audio_osx_sink.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_SINK_H
00024 #define INCLUDED_AUDIO_OSX_SINK_H
00025 
00026 #include <gr_sync_block.h>
00027 #include <string>
00028 #include <list>
00029 #include <AudioUnit/AudioUnit.h>
00030 #include <circular_buffer.h>
00031 
00032 class audio_osx_sink;
00033 typedef boost::shared_ptr<audio_osx_sink> audio_osx_sink_sptr;
00034 
00035 audio_osx_sink_sptr
00036 audio_osx_make_sink (int sample_rate = 44100,
00037                      const std::string device_name = "2",
00038                      bool do_block = true,
00039                      int channel_config = -1,
00040                      int max_sample_count = -1);
00041 
00049 class audio_osx_sink : public gr_sync_block {
00050   friend audio_osx_sink_sptr
00051   audio_osx_make_sink (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_sample_rate;
00058   int                 d_channel_config;
00059   UInt32              d_n_channels;
00060   UInt32              d_queueSampleCount, d_max_sample_count;
00061   bool                d_do_block;
00062   mld_mutex_ptr       d_internal;
00063   mld_condition_ptr   d_cond_data;
00064   circular_buffer<float>** d_buffers;
00065 
00066 // AudioUnits and Such
00067   AudioUnit           d_OutputAU;
00068 
00069 protected:
00070   audio_osx_sink (int sample_rate = 44100,
00071                   const std::string device_name = "2",
00072                   bool do_block = true,
00073                   int channel_config = -1,
00074                   int max_sample_count = -1);
00075 
00076 public:
00077   ~audio_osx_sink ();
00078 
00079   bool IsRunning ();
00080   bool start ();
00081   bool stop ();
00082 
00083   int work (int noutput_items,
00084             gr_vector_const_void_star &input_items,
00085             gr_vector_void_star &output_items);
00086 
00087 private:
00088   static OSStatus AUOutputCallback (void *inRefCon, 
00089                                     AudioUnitRenderActionFlags *ioActionFlags, 
00090                                     const AudioTimeStamp *inTimeStamp, 
00091                                     UInt32 inBusNumber, 
00092                                     UInt32 inNumberFrames, 
00093                                     AudioBufferList *ioData);
00094 };
00095 
00096 #endif /* INCLUDED_AUDIO_OSX_SINK_H */

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