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//audio.pulseaudiosimple (2010-01-05)
//author: byuu
#include <pulse/simple.h>
#include <pulse/error.h>
namespace ruby {
class pAudioPulseAudioSimple {
public:
struct {
pa_simple* handle;
pa_sample_spec spec;
} device;
struct {
uint32_t* data;
unsigned offset;
} buffer;
struct {
unsigned frequency;
} settings;
bool cap(const string& name) {
if(name == Audio::Frequency) return true;
return false;
}
any get(const string& name) {
if(name == Audio::Frequency) return settings.frequency;
return false;
}
bool set(const string& name, const any& value) {
if(name == Audio::Frequency) {
settings.frequency = any_cast<unsigned>(value);
if(device.handle) init();
return true;
}
return false;
}
void sample(uint16_t left, uint16_t right) {
if(!device.handle) return;
buffer.data[buffer.offset++] = left + (right << 16);
if(buffer.offset >= 64) {
int error;
pa_simple_write(device.handle, (const void*)buffer.data, buffer.offset * sizeof(uint32_t), &error);
buffer.offset = 0;
}
}
void clear() {
}
bool init() {
term();
device.spec.format = PA_SAMPLE_S16LE;
device.spec.channels = 2;
device.spec.rate = settings.frequency;
int error = 0;
device.handle = pa_simple_new(
0, //default server
"ruby::pulseaudiosimple", //application name
PA_STREAM_PLAYBACK, //direction
0, //default device
"audio", //stream description
&device.spec, //sample format
0, //default channel map
0, //default buffering attributes
&error //error code
);
if(!device.handle) {
fprintf(stderr, "ruby::pulseaudiosimple failed to initialize - %s\n", pa_strerror(error));
return false;
}
buffer.data = new uint32_t[64];
buffer.offset = 0;
return true;
}
void term() {
if(device.handle) {
int error;
pa_simple_flush(device.handle, &error);
pa_simple_free(device.handle);
device.handle = nullptr;
}
if(buffer.data) {
delete[] buffer.data;
buffer.data = nullptr;
}
}
pAudioPulseAudioSimple() {
device.handle = nullptr;
buffer.data = nullptr;
settings.frequency = 22050;
}
~pAudioPulseAudioSimple() {
term();
}
};
DeclareAudio(PulseAudioSimple)
};
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