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/* -*- c++ -*- */
/*
* Copyright 2006-2011 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_PORTAUDIO_SOURCE_H
#define INCLUDED_AUDIO_PORTAUDIO_SOURCE_H
#include <gr_audio_source.h>
#include <gr_buffer.h>
#include <gruel/thread.h>
#include <string>
#include <portaudio.h>
#include <stdexcept>
PaStreamCallback portaudio_source_callback;
/*!
* \brief Audio source using PORTAUDIO
* \ingroup audio_blk
*
* Input samples must be in the range [-1,1].
*/
class audio_portaudio_source : public audio_source {
friend PaStreamCallback portaudio_source_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_input_parameters;
gr_buffer_sptr d_writer; // buffer used between work and callback
gr_buffer_reader_sptr d_reader;
gruel::mutex d_ringbuffer_mutex;
gruel::condition_variable d_ringbuffer_cond;
bool d_ringbuffer_ready;
// 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);
void create_ringbuffer();
public:
audio_portaudio_source (int sampling_rate, const std::string device_name,
bool ok_to_block);
~audio_portaudio_source ();
bool check_topology (int ninputs, int noutputs);
int work (int ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
};
#endif /* INCLUDED_AUDIO_PORTAUDIO_SOURCE_H */
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