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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_OSX_SINK_H
#define INCLUDED_AUDIO_OSX_SINK_H
#include <gr_audio_sink.h>
#include <string>
#include <list>
#include <AudioUnit/AudioUnit.h>
#include <circular_buffer.h>
/*!
* \brief audio sink using OSX
*
* input signature is one or two streams of floats.
* Input samples must be in the range [-1,1].
*/
class audio_osx_sink : public audio_sink {
Float64 d_sample_rate;
int d_channel_config;
UInt32 d_n_channels;
UInt32 d_queueSampleCount, d_max_sample_count;
bool d_do_block;
gruel::mutex* d_internal;
gruel::condition_variable* d_cond_data;
circular_buffer<float>** d_buffers;
// AudioUnits and Such
AudioUnit d_OutputAU;
public:
audio_osx_sink (int sample_rate = 44100,
const std::string device_name = "2",
bool do_block = true,
int channel_config = -1,
int max_sample_count = -1);
~audio_osx_sink ();
bool IsRunning ();
bool start ();
bool stop ();
int work (int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
private:
static OSStatus AUOutputCallback (void *inRefCon,
AudioUnitRenderActionFlags *ioActionFlags,
const AudioTimeStamp *inTimeStamp,
UInt32 inBusNumber,
UInt32 inNumberFrames,
AudioBufferList *ioData);
};
#endif /* INCLUDED_AUDIO_OSX_SINK_H */
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