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/*
* Copyright (C) 2015 Robin Gareus <robin@gareus.org>
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __libbackend_portaudio_pcmio_h__
#define __libbackend_portaudio_pcmio_h__
#include <map>
#include <vector>
#include <string>
#include <boost/shared_ptr.hpp>
#include <stdint.h>
#include <portaudio.h>
namespace ARDOUR {
class PortAudioIO {
public:
PortAudioIO (void);
~PortAudioIO (void);
int state (void) const { return _state; }
bool initialize_pa ();
void host_api_list (std::vector<std::string>&);
bool set_host_api (const std::string& host_api_name);
std::string get_host_api () const { return _host_api_name; }
PaHostApiIndex get_host_api_index_from_name (const std::string& name);
PaDeviceIndex get_default_input_device ();
PaDeviceIndex get_default_output_device ();
void discover();
void input_device_list (std::map<int, std::string> &devices) const;
void output_device_list (std::map<int, std::string> &devices) const;
int available_sample_rates (int device_id, std::vector<float>& sampleRates);
int available_buffer_sizes (int device_id, std::vector<uint32_t>& sampleRates);
std::string control_app_name (int device_id) const;
void launch_control_app (int device_id);
void pcm_stop (void);
int pcm_start (void);
int pcm_setup (
int device_input,
int device_output,
double sample_rate,
uint32_t samples_per_period
);
uint32_t n_playback_channels (void) const { return _playback_channels; }
uint32_t n_capture_channels (void) const { return _capture_channels; }
double sample_rate (void) const { return _cur_sample_rate; }
uint32_t capture_latency (void) const { return _cur_input_latency; }
uint32_t playback_latency (void) const { return _cur_output_latency; }
double stream_time(void) const { if (_stream) return Pa_GetStreamTime (_stream); return 0; }
int next_cycle(uint32_t n_samples);
int get_capture_channel (uint32_t chn, float *input, uint32_t n_samples);
int set_playback_channel (uint32_t chn, const float *input, uint32_t n_samples);
private: // Methods
void clear_device_lists ();
void add_default_devices ();
void add_devices ();
private: // Data
int _state;
bool _initialized;
uint32_t _capture_channels;
uint32_t _playback_channels;
PaStream *_stream;
float *_input_buffer;
float *_output_buffer;
double _cur_sample_rate;
uint32_t _cur_input_latency;
uint32_t _cur_output_latency;
struct paDevice {
std::string name;
uint32_t n_inputs;
uint32_t n_outputs;
paDevice (std::string n, uint32_t i, uint32_t o)
: name (n)
, n_inputs (i)
, n_outputs (o)
{}
};
std::map<int, paDevice *> _input_devices;
std::map<int, paDevice *> _output_devices;
PaHostApiIndex _host_api_index;
std::string _host_api_name;
};
} // namespace
#endif /* __libbackend_portaudio_pcmio_h__ */
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