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/*
Copyright (C) 2024 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic 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.
DCP-o-matic 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 DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
#include <dcp/warnings.h>
LIBDCP_DISABLE_WARNINGS
#include <RtAudio.h>
LIBDCP_ENABLE_WARNINGS
#include <boost/optional.hpp>
#include <boost/thread/mutex.hpp>
class AudioBackend
{
public:
AudioBackend();
AudioBackend(AudioBackend const&) = delete;
AudioBackend& operator=(AudioBackend const&) = delete;
RtAudio& rtaudio() {
return _rtaudio;
}
std::vector<std::string> device_names();
boost::optional<std::string> default_device_name();
boost::optional<int> device_channels(std::string name);
void abort_stream_if_running();
boost::optional<std::string> start_stream();
#if (RTAUDIO_VERSION_MAJOR >= 6)
std::string last_error() const;
#endif
static AudioBackend* instance();
private:
static AudioBackend* _instance;
RtAudio _rtaudio;
#if (RTAUDIO_VERSION_MAJOR >= 6)
void rtaudio_error_callback(std::string const& error);
mutable boost::mutex _last_error_mutex;
std::string _last_error;
#endif
};
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