GNU Radio 3.3.0 C++ API
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00001 /* -*- c++ -*- */ 00002 /* 00003 * Copyright 2006.2010 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_SOURCE_H 00023 #define INCLUDED_AUDIO_PORTAUDIO_SOURCE_H 00024 00025 #include <gr_sync_block.h> 00026 #include <gr_buffer.h> 00027 #include <gruel/thread.h> 00028 #include <string> 00029 #include <portaudio.h> 00030 #include <stdexcept> 00031 00032 class audio_portaudio_source; 00033 typedef boost::shared_ptr<audio_portaudio_source> audio_portaudio_source_sptr; 00034 00035 /*! 00036 * \brief PORTAUDIO audio source. 00037 * 00038 * \param sampling_rate sampling rate in Hz 00039 * \param device_name PORTAUDIO device name, e.g., "pa:" 00040 * \param ok_to_block true if it's ok for us to block 00041 */ 00042 audio_portaudio_source_sptr 00043 audio_portaudio_make_source (int sampling_rate, 00044 const std::string device_name = "", 00045 bool ok_to_block = true); 00046 00047 PaStreamCallback portaudio_source_callback; 00048 00049 00050 /*! 00051 * \ Audio source using PORTAUDIO 00052 * 00053 * Input samples must be in the range [-1,1]. 00054 */ 00055 class audio_portaudio_source : public gr_sync_block { 00056 friend audio_portaudio_source_sptr 00057 audio_portaudio_make_source (int sampling_rate, 00058 const std::string device_name, 00059 bool ok_to_block); 00060 00061 friend PaStreamCallback portaudio_source_callback; 00062 00063 00064 unsigned int d_sampling_rate; 00065 std::string d_device_name; 00066 bool d_ok_to_block; 00067 bool d_verbose; 00068 00069 unsigned int d_portaudio_buffer_size_frames; // number of frames in a portaudio buffer 00070 00071 PaStream *d_stream; 00072 PaStreamParameters d_input_parameters; 00073 00074 gr_buffer_sptr d_writer; // buffer used between work and callback 00075 gr_buffer_reader_sptr d_reader; 00076 00077 gruel::mutex d_ringbuffer_mutex; 00078 gruel::condition_variable d_ringbuffer_cond; 00079 bool d_ringbuffer_ready; 00080 00081 // random stats 00082 int d_noverruns; // count of overruns 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_source (int sampling_rate, const std::string device_name, 00091 bool ok_to_block); 00092 00093 public: 00094 ~audio_portaudio_source (); 00095 00096 bool check_topology (int ninputs, int noutputs); 00097 00098 int work (int ninput_items, 00099 gr_vector_const_void_star &input_items, 00100 gr_vector_void_star &output_items); 00101 }; 00102 00103 #endif /* INCLUDED_AUDIO_PORTAUDIO_SOURCE_H */