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an attempt to make pixtone less clicky

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Alula 2020-09-19 00:39:26 +02:00
parent 65a9ecf3fa
commit e50b5463f2
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GPG key ID: 3E00485503A1D8BA
1 changed files with 42 additions and 20 deletions
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62
src/sound/pixtone.rs
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@ -175,7 +175,7 @@ impl PixToneParameters {
return Vec::new();
}
let mut samples = vec![0; length];
let mut samples = vec![0i16; length + 100];
for channel in self.channels.iter() {
if !channel.enabled { continue; }
@ -189,19 +189,30 @@ impl PixToneParameters {
let carrier_wave = channel.carrier.get_waveform();
let frequency_wave = channel.frequency.get_waveform();
let amplitude_wave = channel.amplitude.get_waveform();
let mut last_wave = 0;
for (i, result) in samples.iter_mut().enumerate() {
if i == channel.length as usize {
break;
if i >= channel.length as usize {
if i == channel.length as usize {
last_wave = *result;
} else if i == (channel.length as usize + 100) {
break;
}
let fac = (i - channel.length as usize) as i16 / 2 + 1;
last_wave /= fac;
*result = last_wave;
continue;
} else {
let carrier = carrier_wave[0xff & phase as usize] as i32 * channel.carrier.level;
let freq = frequency_wave[0xff & (channel.frequency.offset as f32 + s(channel.frequency.pitch, i, channel.length)) as usize] as i32 * channel.frequency.level;
let amp = amplitude_wave[0xff & (channel.amplitude.offset as f32 + s(channel.amplitude.pitch, i, channel.length)) as usize] as i32 * channel.amplitude.level;
*result = clamp((*result as i32) + (carrier * (amp + 4096) / 4096 * channel.envelope.evaluate(s(1.0, i, channel.length) as i32) / 4096) * 192, -32767, 32767) as i16;
phase += delta * (1.0 + (freq as f32 / (if freq < 0 { 8192.0 } else { 2048.0 })));
}
let carrier = carrier_wave[0xff & phase as usize] as i32 * channel.carrier.level;
let freq = frequency_wave[0xff & (channel.frequency.offset as f32 + s(channel.frequency.pitch, i, channel.length)) as usize] as i32 * channel.frequency.level;
let amp = amplitude_wave[0xff & (channel.amplitude.offset as f32 + s(channel.amplitude.pitch, i, channel.length)) as usize] as i32 * channel.amplitude.level;
*result = clamp((*result as i32) + (carrier * (amp + 4096) / 4096 * channel.envelope.evaluate(s(1.0, i, channel.length) as i32) / 4096) * 256, -32767, 32767) as i16;
phase += delta * (1.0 + (freq as f32 / (if freq < 0 { 8192.0 } else { 2048.0 })));
}
}
@ -210,7 +221,7 @@ impl PixToneParameters {
}
#[derive(Copy, Clone, PartialEq)]
pub struct PlaybackState(u8, f32, u32);
pub struct PlaybackState(u8, f32, f32, u32);
pub struct PixTonePlayback {
pub samples: HashMap<u8, Vec<i16>>,
@ -233,17 +244,17 @@ impl PixTonePlayback {
pub fn play_sfx(&mut self, id: u8) {
for state in self.playback_state.iter_mut() {
if state.0 == id && state.2 == 0 {
state.1 = 0.0;
return;
if state.0 == id && state.3 == 0 {
state.2 = 200.0;
state.3 = 0xffffffff;
}
}
self.playback_state.push(PlaybackState(id, 0.0, 0));
self.playback_state.push(PlaybackState(id, 0.0, 0.0, 0));
}
pub fn play_concurrent(&mut self, id: u8, tag: u32) {
self.playback_state.push(PlaybackState(id, 0.0, tag));
self.playback_state.push(PlaybackState(id, 0.0, 0.0, tag));
}
pub fn mix(&mut self, dst: &mut [u16], sample_rate: f32) {
@ -271,10 +282,21 @@ impl PixTonePlayback {
let s3 = (sample[clamp(pos + 2, 0, sample.len() - 1)] as f32) / 32768.0;
let s4 = (sample[pos.saturating_sub(1)] as f32) / 32768.0;
let s = cubic_interp(s1, s2, s4, s3, state.1.fract()) * 32768.0;
let sam = (*result ^ 0x8000) as i16;
let mut s = cubic_interp(s1, s2, s4, s3, state.1.fract()) * 32768.0;
*result = sam.saturating_add(s as i16) as u16 ^ 0x8000;
if state.2 > 0.0 {
s *= (state.2 / 200.0);
state.2 -= delta;
if state.2 <= 0.0 {
remove = true;
break;
}
}
let sam = (*result ^ 0x8000) as i16;
*result = sam.wrapping_add(s as i16) as u16 ^ 0x8000;
state.1 += delta;
}