98 lines
2.4 KiB
C++
Executable File
98 lines
2.4 KiB
C++
Executable File
#include <ao/ao.h>
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namespace ruby {
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#include "ao.hpp"
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class pAudioAO {
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public:
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AudioAO &self;
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int driver_id;
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ao_sample_format driver_format;
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ao_device *audio_device;
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struct {
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unsigned frequency;
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} settings;
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bool cap(Audio::Setting setting) {
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if(setting == Audio::Frequency) return true;
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return false;
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}
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uintptr_t get(Audio::Setting setting) {
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if(setting == Audio::Frequency) return settings.frequency;
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return false;
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}
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bool set(Audio::Setting setting, uintptr_t param) {
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if(setting == Audio::Frequency) {
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settings.frequency = param;
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if(audio_device) {
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term();
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init();
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}
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return true;
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}
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return false;
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}
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void sample(uint16_t l_sample, uint16_t r_sample) {
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uint32_t samp = (l_sample << 0) + (r_sample << 16);
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ao_play(audio_device, (char*)&samp, 4); //This may need to be byte swapped for Big Endian
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}
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bool init() {
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driver_id = ao_default_driver_id(); //ao_driver_id((const char*)driver)
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if(driver_id < 0) return false;
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driver_format.bits = 16;
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driver_format.channels = 2;
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driver_format.rate = settings.frequency;
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driver_format.byte_format = AO_FMT_LITTLE;
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ao_option *options = 0;
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ao_info *di = ao_driver_info(driver_id);
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if(!di) return false;
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if(!strcmp(di->short_name, "alsa")) {
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ao_append_option(&options, "buffer_time", "100000"); //100ms latency (default was 500ms)
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}
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audio_device = ao_open_live(driver_id, &driver_format, options);
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if(!audio_device) return false;
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return true;
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}
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void term() {
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if(audio_device) {
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ao_close(audio_device);
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audio_device = 0;
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}
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}
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pAudioAO(AudioAO &self_) : self(self_) {
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audio_device = 0;
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ao_initialize();
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settings.frequency = 22050;
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}
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~pAudioAO() {
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term();
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//ao_shutdown(); //FIXME: this is causing a segfault for some reason when called ...
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}
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};
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bool AudioAO::cap(Setting setting) { return p.cap(setting); }
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uintptr_t AudioAO::get(Setting setting) { return p.get(setting); }
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bool AudioAO::set(Setting setting, uintptr_t param) { return p.set(setting, param); }
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void AudioAO::sample(uint16_t l_sample, uint16_t r_sample) { p.sample(l_sample, r_sample); }
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bool AudioAO::init() { return p.init(); }
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void AudioAO::term() { p.term(); }
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AudioAO::AudioAO() : p(*new pAudioAO(*this)) {}
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AudioAO::~AudioAO() { delete &p; }
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} //namespace ruby
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