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/* -*- 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 3, 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., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifndef INCLUDED_AUDIO_JACK_SOURCE_H
#define INCLUDED_AUDIO_JACK_SOURCE_H
#include <gr_sync_block.h>
#include <string>
#include <jack/jack.h>
#include <jack/ringbuffer.h>
#include <stdexcept>
class audio_jack_source;
typedef boost::shared_ptr<audio_jack_source> audio_jack_source_sptr;
/*!
* \brief make a JACK audio source.
*
* \param sampling_rate sampling rate in Hz
* \param dev JACK device name, e.g., "gr_source"
* \param ok_to_block
*/
audio_jack_source_sptr
audio_jack_make_source (int sampling_rate,
const std::string dev = "",
bool ok_to_block = true);
int jack_source_process (jack_nframes_t nframes, void *arg);
/*!
* \brief audio source using JACK
*
* The source has one input stream of floats.
*
* Output samples will be in the range [-1,1].
*/
class audio_jack_source : public gr_sync_block {
friend audio_jack_source_sptr
audio_jack_make_source (int sampling_rate, const std::string device_name, bool ok_to_block);
friend int jack_source_process (jack_nframes_t nframes, void *arg);
// typedef for pointer to class work method
typedef int (audio_jack_source::*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_input_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_noverruns; // count of overruns
void output_error_msg (const char *msg, int err);
void bail (const char *msg, int err) throw (std::runtime_error);
protected:
audio_jack_source (int sampling_rate, const std::string device_name, bool ok_to_block);
public:
~audio_jack_source ();
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_SOURCE_H */
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