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fix(snd): clock channel 2 every T-cycle

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This commit is contained in:
Rekai Nyangadzayi Musuka
2021-07-10 14:00:22 -05:00
parent 91d19a7e66
commit 3c28dd7a6b
1 changed files with 8 additions and 4 deletions
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12
src/sound.rs
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@@ -59,6 +59,8 @@ impl Sound {
} }
} }
self.ch2.clock();
self.div_prev = Some(bit_5); self.div_prev = Some(bit_5);
// TODO: Should the FrameSequencer be run first? // TODO: Should the FrameSequencer be run first?
@@ -66,7 +68,7 @@ impl Sound {
// Sample the APU // Sample the APU
self.cycle %= SAMPLE_RATE_IN_CYCLES; self.cycle %= SAMPLE_RATE_IN_CYCLES;
let left_sample = self.ch2.clock(); let left_sample = self.ch2.amplitude();
let right_sample = left_sample; let right_sample = left_sample;
if let Some(send) = self.sender.as_ref() { if let Some(send) = self.sender.as_ref() {
@@ -525,7 +527,11 @@ pub(crate) struct Channel2 {
} }
impl Channel2 { impl Channel2 {
fn clock(&mut self) -> u8 { fn amplitude(&self) -> u8 {
self.duty.wave_pattern().amplitude(self.duty_pos)
}
fn clock(&mut self) {
self.freq_timer -= 1; self.freq_timer -= 1;
if self.freq_timer == 0 { if self.freq_timer == 0 {
@@ -533,8 +539,6 @@ impl Channel2 {
self.freq_timer = (2048 - self.frequency()) * 4; self.freq_timer = (2048 - self.frequency()) * 4;
self.duty_pos = (self.duty_pos + 1) % 8; self.duty_pos = (self.duty_pos + 1) % 8;
} }
self.duty.wave_pattern().amplitude(self.duty_pos)
} }
/// 0xFF16 | NR21 - Channel 2 Sound length / Wave Pattern Duty /// 0xFF16 | NR21 - Channel 2 Sound length / Wave Pattern Duty