106 lines
2.9 KiB
C
106 lines
2.9 KiB
C
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/*
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* Copyright (C) 2015 Robin Gareus <robin@gareus.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <CoreServices/CoreServices.h>
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#include <CoreAudio/CoreAudio.h>
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#include <AudioUnit/AudioUnit.h>
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#include <AudioUnit/AudioUnit.h>
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#include <AudioToolbox/AudioToolbox.h>
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#include <map>
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#include <string>
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#define AUHAL_OUTPUT_ELEMENT 0
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#define AUHAL_INPUT_ELEMENT 1
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class CoreAudioPCM {
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public:
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CoreAudioPCM (void);
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~CoreAudioPCM (void);
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int state (void) const { return _state; }
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uint32_t n_playback_channels (void) const { return _playback_channels; }
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uint32_t n_capture_channels (void) const { return _capture_channels; }
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void discover();
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void device_list(std::map<size_t, std::string> &devices) const { devices = _devices;}
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void pcm_stop (void);
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int pcm_start (
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uint32_t input_device,
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uint32_t output_device,
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uint32_t sample_rate,
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uint32_t samples_per_period,
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int (process_callback (void*)),
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void * process_arg
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);
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void set_error_callback (
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void ( error_callback (void*)),
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void * error_arg
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) {
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_error_callback = error_callback;
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_error_arg = error_arg;
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}
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// must be called from process_callback;
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int get_capture_channel (uint32_t chn, float *input, uint32_t n_samples);
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int set_playback_channel (uint32_t chn, const float *input, uint32_t n_samples);
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uint32_t n_samples() const { return _cur_samples_per_period; };
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// really private
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OSStatus render_callback (
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AudioUnitRenderActionFlags* ioActionFlags,
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const AudioTimeStamp* inTimeStamp,
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UInt32 inBusNumber,
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UInt32 inNumberFrames,
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AudioBufferList* ioData);
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void hwPropertyChange();
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private:
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AudioUnit _auhal;
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AudioDeviceID* _deviceIDs;
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AudioBufferList* _inputAudioBufferList;
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AudioBufferList* _outputAudioBufferList;
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int _state;
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uint32_t _max_samples_per_period;
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uint32_t _cur_samples_per_period;
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uint32_t _capture_channels;
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uint32_t _playback_channels;
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bool _in_process;
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size_t _numDevices;
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int (* _process_callback) (void*);
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void * _process_arg;
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void (* _error_callback) (void*);
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void * _error_arg;
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std::map<size_t, std::string> _devices;
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// TODO proper device info struct
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uint32_t * _device_ins;
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uint32_t * _device_outs;
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};
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