GNU Radio 3.2.2 C++ API
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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 #ifndef INCLUDED_AUDIO_PORTAUDIO_SINK_H 00023 #define INCLUDED_AUDIO_PORTAUDIO_SINK_H 00024 00025 #include <gr_sync_block.h> 00026 #include <gr_buffer.h> 00027 #include <gnuradio/omnithread.h> 00028 #include <string> 00029 #include <portaudio.h> 00030 #include <stdexcept> 00031 #include <gri_logger.h> 00032 00033 class audio_portaudio_sink; 00034 typedef boost::shared_ptr<audio_portaudio_sink> audio_portaudio_sink_sptr; 00035 00036 /*! 00037 * \brief PORTAUDIO audio sink. 00038 * 00039 * \param sampling_rate sampling rate in Hz 00040 * \param device_name PORTAUDIO device name, e.g., "pa:" 00041 * \param ok_to_block true if it's ok for us to block 00042 */ 00043 audio_portaudio_sink_sptr 00044 audio_portaudio_make_sink (int sampling_rate, 00045 const std::string device_name = "", 00046 bool ok_to_block = true); 00047 00048 PaStreamCallback portaudio_sink_callback; 00049 00050 00051 /*! 00052 * \ Audio sink using PORTAUDIO 00053 * 00054 * Input samples must be in the range [-1,1]. 00055 */ 00056 class audio_portaudio_sink : public gr_sync_block { 00057 friend audio_portaudio_sink_sptr 00058 audio_portaudio_make_sink (int sampling_rate, 00059 const std::string device_name, 00060 bool ok_to_block); 00061 00062 friend PaStreamCallback portaudio_sink_callback; 00063 00064 00065 unsigned int d_sampling_rate; 00066 std::string d_device_name; 00067 bool d_ok_to_block; 00068 bool d_verbose; 00069 00070 unsigned int d_portaudio_buffer_size_frames; // number of frames in a portaudio buffer 00071 00072 PaStream *d_stream; 00073 PaStreamParameters d_output_parameters; 00074 00075 gr_buffer_sptr d_writer; // buffer used between work and callback 00076 gr_buffer_reader_sptr d_reader; 00077 omni_semaphore d_ringbuffer_ready; // binary semaphore 00078 00079 00080 // random stats 00081 int d_nunderuns; // count of underruns 00082 gri_logger_sptr d_log; // handle to non-blocking logging instance 00083 00084 void output_error_msg (const char *msg, int err); 00085 void bail (const char *msg, int err) throw (std::runtime_error); 00086 void create_ringbuffer(); 00087 00088 00089 protected: 00090 audio_portaudio_sink (int sampling_rate, const std::string device_name, 00091 bool ok_to_block); 00092 00093 public: 00094 ~audio_portaudio_sink (); 00095 00096 bool check_topology (int ninputs, int noutputs); 00097 00098 int work (int noutput_items, 00099 gr_vector_const_void_star &input_items, 00100 gr_vector_void_star &output_items); 00101 }; 00102 00103 #endif /* INCLUDED_AUDIO_PORTAUDIO_SINK_H */