GNU Radio 3.5.3.2 C++ API
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00001 /* -*- c++ -*- */ 00002 /* 00003 * Copyright 2005-2011 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_JACK_SINK_H 00023 #define INCLUDED_AUDIO_JACK_SINK_H 00024 00025 #include <gr_audio_sink.h> 00026 #include <string> 00027 #include <jack/jack.h> 00028 #include <jack/ringbuffer.h> 00029 #include <stdexcept> 00030 00031 int jack_sink_process (jack_nframes_t nframes, void *arg); 00032 00033 /*! 00034 * \brief audio sink using JACK 00035 * \ingroup audio_blk 00036 * 00037 * The sink has one input stream of floats. 00038 * 00039 * Input samples must be in the range [-1,1]. 00040 */ 00041 class audio_jack_sink : public audio_sink { 00042 00043 friend int jack_sink_process (jack_nframes_t nframes, void *arg); 00044 00045 // typedef for pointer to class work method 00046 typedef int (audio_jack_sink::*work_t)(int noutput_items, 00047 gr_vector_const_void_star &input_items, 00048 gr_vector_void_star &output_items); 00049 00050 unsigned int d_sampling_rate; 00051 std::string d_device_name; 00052 bool d_ok_to_block; 00053 00054 jack_client_t *d_jack_client; 00055 jack_port_t *d_jack_output_port; 00056 jack_ringbuffer_t *d_ringbuffer; 00057 jack_nframes_t d_jack_buffer_size; 00058 pthread_cond_t d_ringbuffer_ready; 00059 pthread_mutex_t d_jack_process_lock; 00060 00061 // random stats 00062 int d_nunderuns; // count of underruns 00063 00064 void output_error_msg (const char *msg, int err); 00065 void bail (const char *msg, int err) throw (std::runtime_error); 00066 00067 00068 public: 00069 audio_jack_sink (int sampling_rate, const std::string device_name, bool ok_to_block); 00070 00071 ~audio_jack_sink (); 00072 00073 bool check_topology (int ninputs, int noutputs); 00074 00075 int work (int noutput_items, 00076 gr_vector_const_void_star &input_items, 00077 gr_vector_void_star &output_items); 00078 }; 00079 00080 #endif /* INCLUDED_AUDIO_JACK_SINK_H */