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/* -*- c++ -*- */
/*
* Copyright 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_PORTAUDIO_SINK_H
#define INCLUDED_AUDIO_PORTAUDIO_SINK_H
#include <gr_sync_block.h>
#include <gr_buffer.h>
#include <omnithread.h>
#include <string>
#include <portaudio.h>
#include <stdexcept>
#include <gri_logger.h>
class audio_portaudio_sink;
typedef boost::shared_ptr<audio_portaudio_sink> audio_portaudio_sink_sptr;
/*!
* \PORTAUDIO audio sink.
* \param sampling_rate sampling rate in Hz
* \param dev PORTAUDIO device name, e.g., "pa:"
* \param ok_to_block true if it's ok for us to block
*/
audio_portaudio_sink_sptr
audio_portaudio_make_sink (int sampling_rate,
const std::string dev = "",
bool ok_to_block = true);
PaStreamCallback portaudio_sink_callback;
/*!
* \ Audio sink using PORTAUDIO
*
* Input samples must be in the range [-1,1].
*/
class audio_portaudio_sink : public gr_sync_block {
friend audio_portaudio_sink_sptr
audio_portaudio_make_sink (int sampling_rate,
const std::string device_name,
bool ok_to_block);
friend PaStreamCallback portaudio_sink_callback;
unsigned int d_sampling_rate;
std::string d_device_name;
bool d_ok_to_block;
bool d_verbose;
unsigned int d_portaudio_buffer_size_frames; // number of frames in a portaudio buffer
PaStream *d_stream;
PaStreamParameters d_output_parameters;
gr_buffer_sptr d_writer; // buffer used between work and callback
gr_buffer_reader_sptr d_reader;
omni_semaphore d_ringbuffer_ready; // binary semaphore
// random stats
int d_nunderuns; // count of underruns
gri_logger_sptr d_log; // handle to non-blocking logging instance
void output_error_msg (const char *msg, int err);
void bail (const char *msg, int err) throw (std::runtime_error);
void create_ringbuffer();
protected:
audio_portaudio_sink (int sampling_rate, const std::string device_name,
bool ok_to_block);
public:
~audio_portaudio_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_PORTAUDIO_SINK_H */
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