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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_SOURCE_H
#define INCLUDED_AUDIO_OSX_SOURCE_H
#include <gr_audio_source.h>
#include <string>
#include <AudioToolbox/AudioToolbox.h>
#include <AudioUnit/AudioUnit.h>
#include <circular_buffer.h>
/*!
* \brief audio source using OSX
*
* Input signature is one or two streams of floats.
* Samples must be in the range [-1,1].
*/
class audio_osx_source : public audio_source {
Float64 d_deviceSampleRate, d_outputSampleRate;
int d_channel_config;
UInt32 d_inputBufferSizeFrames, d_inputBufferSizeBytes;
UInt32 d_outputBufferSizeFrames, d_outputBufferSizeBytes;
UInt32 d_deviceBufferSizeFrames, d_deviceBufferSizeBytes;
UInt32 d_leadSizeFrames, d_leadSizeBytes;
UInt32 d_trailSizeFrames, d_trailSizeBytes;
UInt32 d_extraBufferSizeFrames, d_extraBufferSizeBytes;
UInt32 d_queueSampleCount, d_max_sample_count;
UInt32 d_n_AvailableInputFrames, d_n_ActualInputFrames;
UInt32 d_n_user_channels, d_n_max_channels, d_n_deviceChannels;
bool d_do_block, d_passThrough, d_waiting_for_data;
gruel::mutex* d_internal;
gruel::condition_variable* d_cond_data;
circular_buffer<float>** d_buffers;
// AudioUnits and Such
AudioUnit d_InputAU;
AudioBufferList* d_InputBuffer;
AudioBufferList* d_OutputBuffer;
AudioConverterRef d_AudioConverter;
public:
audio_osx_source (int sample_rate = 44100,
const std::string device_name = "",
bool do_block = true,
int channel_config = -1,
int max_sample_count = -1);
~audio_osx_source ();
bool start ();
bool stop ();
bool IsRunning ();
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);
private:
void SetDefaultInputDeviceAsCurrent ();
void AllocAudioBufferList (AudioBufferList** t_ABL,
UInt32 n_channels,
UInt32 inputBufferSizeBytes);
void FreeAudioBufferList (AudioBufferList** t_ABL);
static OSStatus ConverterCallback (AudioConverterRef inAudioConverter,
UInt32* ioNumberDataPackets,
AudioBufferList* ioData,
AudioStreamPacketDescription** outASPD,
void* inUserData);
static OSStatus AUInputCallback (void *inRefCon,
AudioUnitRenderActionFlags *ioActionFlags,
const AudioTimeStamp *inTimeStamp,
UInt32 inBusNumber,
UInt32 inNumberFrames,
AudioBufferList *ioData);
#if _OSX_DO_LISTENERS_
static OSStatus UnitListener (void *inRefCon,
AudioUnit ci,
AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement);
static OSStatus HardwareListener (AudioHardwarePropertyID inPropertyID,
void *inClientData);
#endif
};
#endif /* INCLUDED_AUDIO_OSX_SOURCE_H */
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