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Diffstat (limited to 'gr-audio-jack/src/audio_jack_sink.h')
| -rw-r--r-- | gr-audio-jack/src/audio_jack_sink.h | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/gr-audio-jack/src/audio_jack_sink.h b/gr-audio-jack/src/audio_jack_sink.h new file mode 100644 index 000000000..00b94990d --- /dev/null +++ b/gr-audio-jack/src/audio_jack_sink.h @@ -0,0 +1,97 @@ +/* -*- c++ -*- */ +/* + * Copyright 2005,2006 Free Software Foundation, Inc. + * + * This file is part of GNU Radio + * + * GNU Radio is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * GNU Radio is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GNU Radio; see the file COPYING. If not, write to + * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ +#ifndef INCLUDED_AUDIO_JACK_SINK_H +#define INCLUDED_AUDIO_JACK_SINK_H + +#include <gr_sync_block.h> +#include <string> +#include <jack/jack.h> +#include <jack/ringbuffer.h> +#include <stdexcept> + +class audio_jack_sink; +typedef boost::shared_ptr<audio_jack_sink> audio_jack_sink_sptr; + +/*! + * \brief make an JACK audio sink. + * + * \param sampling_rate sampling rate in Hz + * \param dev JACK device name, e.g., "gr_sink" + * \param ok_to_block + */ +audio_jack_sink_sptr +audio_jack_make_sink (int sampling_rate, + const std::string dev = "", + bool ok_to_block = true); + +int jack_sink_process (jack_nframes_t nframes, void *arg); + +/*! + * \brief audio sink using JACK + * + * The sink has one input stream of floats. + * + * Input samples must be in the range [-1,1]. + */ +class audio_jack_sink : public gr_sync_block { + friend audio_jack_sink_sptr + audio_jack_make_sink (int sampling_rate, const std::string device_name, bool ok_to_block); + + friend int jack_sink_process (jack_nframes_t nframes, void *arg); + + // typedef for pointer to class work method + typedef int (audio_jack_sink::*work_t)(int noutput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items); + + unsigned int d_sampling_rate; + std::string d_device_name; + bool d_ok_to_block; + + jack_client_t *d_jack_client; + jack_port_t *d_jack_output_port; + jack_ringbuffer_t *d_ringbuffer; + jack_nframes_t d_jack_buffer_size; + pthread_cond_t d_ringbuffer_ready; + pthread_mutex_t d_jack_process_lock; + + // random stats + int d_nunderuns; // count of underruns + + void output_error_msg (const char *msg, int err); + void bail (const char *msg, int err) throw (std::runtime_error); + + + protected: + audio_jack_sink (int sampling_rate, const std::string device_name, bool ok_to_block); + + public: + ~audio_jack_sink (); + + bool check_topology (int ninputs, int noutputs); + + int work (int noutput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items); +}; + +#endif /* INCLUDED_AUDIO_JACK_SINK_H */ |