mirror of https://github.com/bsnes-emu/bsnes.git
87 lines
2.0 KiB
C++
87 lines
2.0 KiB
C++
#include <ao/ao.h>
|
|
|
|
struct AudioAO : Audio {
|
|
AudioAO() { initialize(); }
|
|
~AudioAO() { terminate(); }
|
|
|
|
auto availableDevices() -> string_vector {
|
|
return {"Default"};
|
|
}
|
|
|
|
auto availableFrequencies() -> vector<double> {
|
|
return {44100.0, 48000.0, 96000.0};
|
|
}
|
|
|
|
auto availableLatencies() -> vector<uint> {
|
|
return {100};
|
|
}
|
|
|
|
auto availableChannels() -> vector<uint> {
|
|
return {2};
|
|
}
|
|
|
|
auto ready() -> bool { return _ready; }
|
|
auto blocking() -> bool { return true; }
|
|
auto channels() -> uint { return 2; }
|
|
auto frequency() -> double { return _frequency; }
|
|
auto latency() -> uint { return 100; }
|
|
|
|
auto setFrequency(double frequency) -> bool {
|
|
if(_frequency == frequency) return true;
|
|
_frequency = frequency;
|
|
return initialize();
|
|
}
|
|
|
|
auto output(const double samples[]) -> void {
|
|
uint32_t sample = 0;
|
|
sample |= (uint16_t)sclamp<16>(samples[0] * 32767.0) << 0;
|
|
sample |= (uint16_t)sclamp<16>(samples[1] * 32767.0) << 16;
|
|
ao_play(_interface, (char*)&sample, 4);
|
|
}
|
|
|
|
auto initialize() -> bool {
|
|
terminate();
|
|
|
|
ao_initialize();
|
|
|
|
int driverID = ao_default_driver_id();
|
|
if(driverID < 0) return false;
|
|
|
|
ao_sample_format format;
|
|
format.bits = 16;
|
|
format.channels = 2;
|
|
format.rate = (uint)_frequency;
|
|
format.byte_format = AO_FMT_LITTLE;
|
|
format.matrix = nullptr;
|
|
|
|
ao_info* information = ao_driver_info(driverID);
|
|
if(!information) return false;
|
|
_device = information->short_name;
|
|
|
|
ao_option* options = nullptr;
|
|
if(_device == "alsa") {
|
|
ao_append_option(&options, "buffer_time", "100000"); //100ms latency (default was 500ms)
|
|
}
|
|
|
|
_interface = ao_open_live(driverID, &format, options);
|
|
if(!_interface) return false;
|
|
|
|
return _ready = true;
|
|
}
|
|
|
|
auto terminate() -> void {
|
|
_ready = false;
|
|
if(_interface) {
|
|
ao_close(_interface);
|
|
_interface = nullptr;
|
|
}
|
|
ao_shutdown();
|
|
}
|
|
|
|
bool _ready = false;
|
|
string _device = "Default";
|
|
double _frequency = 48000.0;
|
|
|
|
ao_device* _interface = nullptr;
|
|
};
|