104 lines
2.7 KiB
C
104 lines
2.7 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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#ifndef __libbackend_portaudio_pcmio_h__
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#define __libbackend_portaudio_pcmio_h__
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#include <map>
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#include <vector>
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#include <string>
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#include <boost/shared_ptr.hpp>
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#include <stdint.h>
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#include <portaudio.h>
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namespace ARDOUR {
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class PortAudioIO {
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public:
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PortAudioIO (void);
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~PortAudioIO (void);
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int state (void) const { return _state; }
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void discover();
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void device_list (std::map<int, std::string> &devices) const;
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int available_sample_rates (int device_id, std::vector<float>& sampleRates);
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int available_buffer_sizes (int device_id, std::vector<uint32_t>& sampleRates);
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void pcm_stop (void);
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int pcm_start (void);
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int pcm_setup (
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int device_input,
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int device_output,
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double sample_rate,
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uint32_t samples_per_period
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);
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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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double sample_rate (void) const { return _cur_sample_rate; }
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uint32_t capture_latency (void) const { return _cur_input_latency; }
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uint32_t playback_latency (void) const { return _cur_output_latency; }
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double stream_time(void) const { if (_stream) return Pa_GetStreamTime (_stream); return 0; }
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int next_cycle(uint32_t n_samples);
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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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private:
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int _state;
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bool _initialized;
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uint32_t _capture_channels;
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uint32_t _playback_channels;
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PaStream *_stream;
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float *_input_buffer;
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float *_output_buffer;
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double _cur_sample_rate;
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uint32_t _cur_input_latency;
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uint32_t _cur_output_latency;
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struct paDevice {
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std::string name;
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uint32_t n_inputs;
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uint32_t n_outputs;
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paDevice (std::string n, uint32_t i, uint32_t o)
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: name (n)
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, n_inputs (i)
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, n_outputs (o)
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{}
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};
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std::map<int, paDevice *> _devices;
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};
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} // namespace
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#endif /* __libbackend_portaudio_pcmio_h__ */
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