GNU Radio 3.5.3.2 C++ API
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00001 /* -*- c++ -*- */ 00002 /* 00003 * Copyright 2006-2011 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_audio_source.h> 00026 #include <gr_buffer.h> 00027 #include <gruel/thread.h> 00028 #include <string> 00029 #include <portaudio.h> 00030 #include <stdexcept> 00031 00032 PaStreamCallback portaudio_source_callback; 00033 00034 00035 /*! 00036 * \brief Audio source using PORTAUDIO 00037 * \ingroup audio_blk 00038 * 00039 * Input samples must be in the range [-1,1]. 00040 */ 00041 class audio_portaudio_source : public audio_source { 00042 00043 friend PaStreamCallback portaudio_source_callback; 00044 00045 00046 unsigned int d_sampling_rate; 00047 std::string d_device_name; 00048 bool d_ok_to_block; 00049 bool d_verbose; 00050 00051 unsigned int d_portaudio_buffer_size_frames; // number of frames in a portaudio buffer 00052 00053 PaStream *d_stream; 00054 PaStreamParameters d_input_parameters; 00055 00056 gr_buffer_sptr d_writer; // buffer used between work and callback 00057 gr_buffer_reader_sptr d_reader; 00058 00059 gruel::mutex d_ringbuffer_mutex; 00060 gruel::condition_variable d_ringbuffer_cond; 00061 bool d_ringbuffer_ready; 00062 00063 // random stats 00064 int d_noverruns; // count of overruns 00065 00066 void output_error_msg (const char *msg, int err); 00067 void bail (const char *msg, int err) throw (std::runtime_error); 00068 void create_ringbuffer(); 00069 00070 00071 public: 00072 audio_portaudio_source (int sampling_rate, const std::string device_name, 00073 bool ok_to_block); 00074 00075 ~audio_portaudio_source (); 00076 00077 bool check_topology (int ninputs, int noutputs); 00078 00079 int work (int ninput_items, 00080 gr_vector_const_void_star &input_items, 00081 gr_vector_void_star &output_items); 00082 }; 00083 00084 #endif /* INCLUDED_AUDIO_PORTAUDIO_SOURCE_H */