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DummyBackend: add Uniform White Noise Generator.

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This commit is contained in:
Robin Gareus 2014-07-11 18:05:59 +02:00
parent 12025d4ffa
commit 4af088c251
2 changed files with 16 additions and 6 deletions
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19
libs/backends/dummy/dummy_audiobackend.cc
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@ -82,7 +82,8 @@ DummyAudioBackend::enumerate_devices () const
if (_device_status.empty()) {
_device_status.push_back (DeviceStatus (_("Silence"), true));
_device_status.push_back (DeviceStatus (_("Sine Wave"), true));
_device_status.push_back (DeviceStatus (_("White Noise"), true));
_device_status.push_back (DeviceStatus (_("Uniform White Noise"), true));
_device_status.push_back (DeviceStatus (_("Gaussian White Noise"), true));
_device_status.push_back (DeviceStatus (_("Pink Noise"), true));
_device_status.push_back (DeviceStatus (_("Pink Noise (low CPU)"), true));
}
@ -646,8 +647,10 @@ DummyAudioBackend::register_system_ports()
{
LatencyRange lr;
enum DummyAudioPort::GeneratorType gt;
if (_device == _("White Noise")) {
gt = DummyAudioPort::WhiteNoise;
if (_device == _("Uniform White Noise")) {
gt = DummyAudioPort::UniformWhiteNoise;
} else if (_device == _("Gaussian White Noise")) {
gt = DummyAudioPort::GaussianWhiteNoise;
} else if (_device == _("Pink Noise")) {
gt = DummyAudioPort::PinkNoise;
} else if (_device == _("Pink Noise (low CPU)")) {
@ -1317,7 +1320,8 @@ void DummyAudioPort::setup_generator (GeneratorType const g, float const sampler
switch (_gen_type) {
case PinkNoise:
case PonyNoise:
case WhiteNoise:
case UniformWhiteNoise:
case GaussianWhiteNoise:
case Silence:
break;
case SineWave:
@ -1407,7 +1411,12 @@ void DummyAudioPort::generate (const pframes_t n_samples)
}
}
break;
case WhiteNoise:
case UniformWhiteNoise:
for (pframes_t i = 0 ; i < n_samples; ++i) {
_buffer[i] = .158489f * randf();
}
break;
case GaussianWhiteNoise:
for (pframes_t i = 0 ; i < n_samples; ++i) {
_buffer[i] = .089125f * grandf();
}

3
libs/backends/dummy/dummy_audiobackend.h
View File

@ -127,7 +127,8 @@ class DummyAudioPort : public DummyPort {
enum GeneratorType {
Silence,
WhiteNoise,
UniformWhiteNoise,
GaussianWhiteNoise,
PinkNoise,
PonyNoise,
SineWave,