mirror of https://github.com/bsnes-emu/bsnes.git
86 lines
2.2 KiB
C++
86 lines
2.2 KiB
C++
#include <pulse/simple.h>
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#include <pulse/error.h>
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struct AudioPulseAudioSimple : Audio {
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AudioPulseAudioSimple() { initialize(); }
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~AudioPulseAudioSimple() { terminate(); }
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auto driver() -> string override { return "PulseAudioSimple"; }
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auto ready() -> bool override { return _ready; }
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auto hasFrequency() -> bool override { return true; }
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auto availableFrequencies() -> vector<double> override {
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return {44100.0, 48000.0, 96000.0};
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}
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auto setFrequency(double frequency) -> bool override {
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if(frequency == Audio::frequency()) return true;
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if(!Audio::setFrequency(frequency)) return false;
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return initialize();
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}
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auto output(const double samples[]) -> void override {
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if(!ready()) return;
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_buffer[_offset] = (uint16_t)sclamp<16>(samples[0] * 32767.0) << 0;
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_buffer[_offset] |= (uint16_t)sclamp<16>(samples[1] * 32767.0) << 16;
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if(++_offset >= 64) {
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int error;
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pa_simple_write(_interface, (const void*)_buffer, _offset * sizeof(uint32_t), &error);
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_offset = 0;
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}
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}
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private:
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auto initialize() -> bool {
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terminate();
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pa_sample_spec specification;
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specification.format = PA_SAMPLE_S16LE;
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specification.channels = 2;
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specification.rate = (uint)_frequency;
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int error = 0;
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_interface = pa_simple_new(
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0, //default server
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"ruby::pulseAudioSimple", //application name
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PA_STREAM_PLAYBACK, //direction
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0, //default device
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"audio", //stream description
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&specification, //sample format
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0, //default channel map
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0, //default buffering attributes
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&error //error code
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);
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if(!_interface) return false;
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_buffer = new uint32_t[64]();
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_offset = 0;
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return _ready = true;
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}
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auto terminate() -> void {
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_ready = false;
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if(_interface) {
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int error;
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pa_simple_flush(_interface, &error);
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pa_simple_free(_interface);
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_interface = nullptr;
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}
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if(_buffer) {
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delete[] _buffer;
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_buffer = nullptr;
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}
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}
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bool _ready = false;
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pa_simple* _interface = nullptr;
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uint32_t* _buffer = nullptr;
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uint _offset = 0;
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};
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