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/* -*- c++ -*- */
/*
* Copyright 2005-2011,2013 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#ifndef INCLUDED_AUDIO_JACK_SOURCE_H
#define INCLUDED_AUDIO_JACK_SOURCE_H
#include <gnuradio/audio/source.h>
#include <jack/jack.h>
#include <jack/ringbuffer.h>
#include <stdexcept>
#include <string>
namespace gr {
namespace audio {
int jack_source_process(jack_nframes_t nframes, void* arg);
/*!
* \brief audio source using JACK
* \ingroup audio_blk
*
* The source has one input stream of floats.
*
* Output samples will be in the range [-1,1].
*/
class jack_source : public source
{
friend int jack_source_process(jack_nframes_t nframes, void* arg);
// typedef for pointer to class work method
typedef int (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;
jack_client_t* d_jack_client;
static constexpr int MAX_PORTS = 10;
int d_portcount;
jack_port_t* d_jack_input_port[MAX_PORTS];
jack_ringbuffer_t* d_ringbuffer[MAX_PORTS];
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);
public:
jack_source(int sampling_rate, const std::string device_name, bool ok_to_block);
~jack_source() override;
bool check_topology(int ninputs, int noutputs) override;
int work(int noutput_items,
gr_vector_const_void_star& input_items,
gr_vector_void_star& output_items) override;
};
} /* namespace audio */
} /* namespace gr */
#endif /* INCLUDED_AUDIO_JACK_SOURCE_H */
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