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No commits in common. "360a9a7b65fabb3377b96a83e3f6594846b6542f" and "aa22e93049a9c77cf5442738fee6c5a89d886b4d" have entirely different histories.
360a9a7b65
...
aa22e93049
244
src/apu.rs
244
src/apu.rs
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@ -5,7 +5,6 @@ use types::ch1::{Sweep, SweepDirection};
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use types::ch3::Volume as Ch3Volume;
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use types::ch4::{CounterWidth, Frequency as Ch4Frequency, PolynomialCounter};
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use types::common::{EnvelopeDirection, FrequencyHigh, SoundDuty, VolumeEnvelope};
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use types::fs::{FrameSequencer, State as FrameSequencerState};
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use types::{ChannelControl, SoundOutput};
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pub mod gen;
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@ -26,7 +25,7 @@ pub struct Apu {
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/// Noise
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ch4: Channel4,
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sequencer: FrameSequencer,
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// Frame Sequencer
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div_prev: Option<u16>,
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prod: Option<SampleProducer<f32>>,
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@ -43,7 +42,7 @@ impl BusIo for Apu {
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0x16 => self.ch2.duty(),
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0x17 => self.ch2.envelope(),
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0x19 => self.ch2.freq_hi(),
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0x1A => self.ch3.dac_enabled(),
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0x1A => self.ch3.enabled(),
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0x1C => self.ch3.volume(),
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0x1E => self.ch3.freq_hi(),
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0x21 => self.ch4.envelope(),
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@ -71,7 +70,7 @@ impl BusIo for Apu {
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0x17 if self.ctrl.enabled => self.ch2.set_envelope(byte),
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0x18 if self.ctrl.enabled => self.ch2.set_freq_lo(byte),
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0x19 if self.ctrl.enabled => self.ch2.set_freq_hi(byte),
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0x1A if self.ctrl.enabled => self.ch3.set_dac_enabled(byte),
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0x1A if self.ctrl.enabled => self.ch3.set_enabled(byte),
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0x1B if self.ctrl.enabled => self.ch3.set_len(byte),
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0x1C if self.ctrl.enabled => self.ch3.set_volume(byte),
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0x1D if self.ctrl.enabled => self.ch3.set_freq_lo(byte),
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@ -97,35 +96,33 @@ impl Apu {
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pub(crate) fn tick(&mut self, div: u16) {
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self.sample_counter += SAMPLE_INCREMENT;
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// Frame Sequencer (512Hz)
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if self.is_falling_edge(12, div) {
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use FrameSequencerState::*;
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match self.sequencer.state() {
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Length => self.clock_length(),
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LengthAndSweep => {
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self.clock_length();
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self.clock_sweep();
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}
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Envelope => self.clock_envelope(),
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Nothing => {}
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// Length Control (256Hz)
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if self.falling_edge(13, div) {
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self.handle_length();
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}
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self.sequencer.next();
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// Sweep (128Hz)
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if self.falling_edge(14, div) {
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self.handle_sweep();
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}
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// Volume Envelope (64Hz)
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if self.falling_edge(15, div) {
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self.handle_volume();
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}
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self.div_prev = Some(div);
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self.ch1.tick();
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self.ch2.tick();
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self.ch3.tick();
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self.ch4.tick();
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self.ch1.clock();
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self.ch2.clock();
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self.ch3.clock();
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self.ch4.clock();
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if self.sample_counter >= SM83_CLOCK_SPEED {
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self.sample_counter %= SM83_CLOCK_SPEED;
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if let Some(ref mut prod) = self.prod {
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if prod.available_blocking() {
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if prod.available_block() {
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// Sample the APU
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let ch1_amplitude = self.ch1.amplitude();
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let ch1_left = self.ctrl.output.ch1_left() as u8 as f32 * ch1_amplitude;
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@ -157,20 +154,23 @@ impl Apu {
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}
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}
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pub fn set_producer(&mut self, prod: SampleProducer<f32>) {
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self.prod = Some(prod);
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}
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/// 0xFF26 | NR52 - Sound On/Off
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pub(crate) fn set_status(&mut self, byte: u8) {
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self.ctrl.enabled = (byte >> 7) & 0x01 == 0x01;
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if self.ctrl.enabled {
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// Frame Sequencer reset to Step 0
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self.sequencer.reset();
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// TODO: With the current implementation of the frame sequencer, what does this even mean?
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// Square Duty units are reset to first step
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self.ch1.duty_pos = 0;
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self.ch2.duty_pos = 0;
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// Wave Channel's sample buffer reset to 0
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self.ch3.offset = 0;
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}
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if !self.ctrl.enabled {
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@ -179,10 +179,6 @@ impl Apu {
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}
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}
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pub fn attach_producer(&mut self, prod: SampleProducer<f32>) {
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self.prod = Some(prod);
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}
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fn reset(&mut self) {
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self.ch1.sweep = Default::default();
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self.ch1.duty = Default::default();
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@ -195,7 +191,7 @@ impl Apu {
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self.ch2.freq_lo = Default::default();
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self.ch2.freq_hi = Default::default();
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self.ch3.dac_enabled = Default::default();
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self.ch3.enabled = Default::default();
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self.ch3.len = Default::default();
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self.ch3.volume = Default::default();
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self.ch3.freq_lo = Default::default();
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@ -209,14 +205,13 @@ impl Apu {
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self.ctrl.channel = Default::default();
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self.ctrl.output = Default::default();
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// Disable the Channels
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// Disable the rest of the channels
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self.ch1.enabled = Default::default();
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self.ch2.enabled = Default::default();
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self.ch3.enabled = Default::default();
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self.ch4.enabled = Default::default();
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}
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fn process_length(freq_hi: &FrequencyHigh, length_timer: &mut u16, enabled: &mut bool) {
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fn clock_length(freq_hi: &FrequencyHigh, length_timer: &mut u16, enabled: &mut bool) {
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if freq_hi.length_disable() && *length_timer > 0 {
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*length_timer -= 1;
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@ -228,7 +223,7 @@ impl Apu {
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}
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}
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fn ch4_process_length(freq: &Ch4Frequency, length_timer: &mut u16, enabled: &mut bool) {
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fn clock_length_ch4(freq: &Ch4Frequency, length_timer: &mut u16, enabled: &mut bool) {
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if freq.length_disable() && *length_timer > 0 {
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*length_timer -= 1;
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@ -240,33 +235,33 @@ impl Apu {
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}
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}
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fn clock_length(&mut self) {
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Self::process_length(
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fn handle_length(&mut self) {
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Self::clock_length(
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&self.ch1.freq_hi,
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&mut self.ch1.length_timer,
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&mut self.ch1.enabled,
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);
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Self::process_length(
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Self::clock_length(
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&self.ch2.freq_hi,
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&mut self.ch2.length_timer,
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&mut self.ch2.enabled,
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);
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Self::process_length(
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Self::clock_length(
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&self.ch3.freq_hi,
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&mut self.ch3.length_timer,
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&mut self.ch3.enabled,
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);
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Self::ch4_process_length(
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Self::clock_length_ch4(
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&self.ch4.freq,
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&mut self.ch4.length_timer,
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&mut self.ch4.enabled,
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);
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}
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fn clock_sweep(&mut self) {
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fn handle_sweep(&mut self) {
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if self.ch1.sweep_timer != 0 {
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self.ch1.sweep_timer -= 1;
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}
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@ -288,7 +283,7 @@ impl Apu {
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}
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}
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fn process_envelope(envelope: &VolumeEnvelope, period_timer: &mut u8, current_volume: &mut u8) {
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fn clock_envelope(envelope: &VolumeEnvelope, period_timer: &mut u8, current_volume: &mut u8) {
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use EnvelopeDirection::*;
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if envelope.period() != 0 {
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@ -308,29 +303,29 @@ impl Apu {
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}
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}
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fn clock_envelope(&mut self) {
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fn handle_volume(&mut self) {
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// Channels 1, 2 and 4 have Volume Envelopes
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Self::process_envelope(
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Self::clock_envelope(
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&self.ch1.envelope,
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&mut self.ch1.period_timer,
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&mut self.ch1.current_volume,
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);
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Self::process_envelope(
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Self::clock_envelope(
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&self.ch2.envelope,
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&mut self.ch2.period_timer,
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&mut self.ch2.current_volume,
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);
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Self::process_envelope(
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Self::clock_envelope(
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&self.ch4.envelope,
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&mut self.ch4.period_timer,
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&mut self.ch4.current_volume,
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);
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}
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fn is_falling_edge(&self, bit: u8, div: u16) -> bool {
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fn falling_edge(&self, bit: u8, div: u16) -> bool {
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match self.div_prev {
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Some(p) => (p >> bit & 0x01) == 0x01 && (div >> bit & 0x01) == 0x00,
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None => false,
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@ -416,6 +411,23 @@ pub(crate) struct Channel1 {
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}
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impl Channel1 {
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fn amplitude(&self) -> f32 {
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let dac_input = self.duty.wave_pattern().amplitude(self.duty_pos) * self.current_volume;
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(dac_input as f32 / 7.5) - 1.0
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}
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fn clock(&mut self) {
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if self.freq_timer != 0 {
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self.freq_timer -= 1;
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}
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if self.freq_timer == 0 {
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self.freq_timer = (2048 - self.frequency()) * 4;
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self.duty_pos = (self.duty_pos + 1) % 8;
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}
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}
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/// 0xFF10 | NR10 - Channel 1 Sweep Register
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pub(crate) fn sweep(&self) -> u8 {
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u8::from(self.sweep) | 0x80
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@ -444,11 +456,7 @@ impl Channel1 {
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/// 0xFF12 | NR12 - Channel 1 Volume Envelope
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pub(crate) fn set_envelope(&mut self, byte: u8) {
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self.envelope = byte.into();
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if !self.is_dac_enabled() {
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self.enabled = false;
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}
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self.envelope = byte.into()
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}
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/// 0xFF13 | NR13 - Channel 1 Frequency low (lower 8 bits only)
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@ -490,31 +498,9 @@ impl Channel1 {
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self.length_timer = 64;
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}
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if self.is_dac_enabled() {
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self.enabled = true;
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}
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}
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}
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fn tick(&mut self) {
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if self.freq_timer != 0 {
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self.freq_timer -= 1;
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}
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if self.freq_timer == 0 {
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self.freq_timer = (2048 - self.frequency()) * 4;
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self.duty_pos = (self.duty_pos + 1) % 8;
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}
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}
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fn amplitude(&self) -> f32 {
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if self.is_dac_enabled() && self.enabled {
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let input = self.duty.wave_pattern().amplitude(self.duty_pos) * self.current_volume;
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(input as f32 / 7.5) - 1.0
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} else {
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0.0
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}
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}
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fn calc_sweep_freq(&mut self) -> u16 {
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use SweepDirection::*;
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@ -543,10 +529,6 @@ impl Channel1 {
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fn frequency(&self) -> u16 {
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(self.freq_hi.freq_bits() as u16) << 8 | self.freq_lo as u16
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}
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fn is_dac_enabled(&self) -> bool {
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self.envelope.0 & 0xF8 != 0x00
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}
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}
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#[derive(Debug, Default)]
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@ -574,6 +556,23 @@ pub(crate) struct Channel2 {
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}
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impl Channel2 {
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fn amplitude(&self) -> f32 {
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let dac_input = self.duty.wave_pattern().amplitude(self.duty_pos) * self.current_volume;
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(dac_input as f32 / 7.5) - 1.0
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}
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fn clock(&mut self) {
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if self.freq_timer != 0 {
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self.freq_timer -= 1;
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}
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if self.freq_timer == 0 {
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self.freq_timer = (2048 - self.frequency()) * 4;
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self.duty_pos = (self.duty_pos + 1) % 8;
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}
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}
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/// 0xFF16 | NR21 - Channel 2 Sound length / Wave Pattern Duty
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pub(crate) fn duty(&self) -> u8 {
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u8::from(self.duty) | 0x3F
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@ -592,11 +591,7 @@ impl Channel2 {
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/// 0xFF17 | NR22 - Channel 2 Volume ENvelope
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pub(crate) fn set_envelope(&mut self, byte: u8) {
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self.envelope = byte.into();
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if !self.is_dac_enabled() {
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self.enabled = false;
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}
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self.envelope = byte.into()
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}
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/// 0xFF18 | NR23 - Channel 2 Frequency low (lower 8 bits only)
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@ -623,45 +618,19 @@ impl Channel2 {
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self.length_timer = 64;
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}
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if self.is_dac_enabled() {
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self.enabled = true;
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}
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}
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}
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fn amplitude(&self) -> f32 {
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if self.is_dac_enabled() && self.enabled {
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let input = self.duty.wave_pattern().amplitude(self.duty_pos) * self.current_volume;
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(input as f32 / 7.5) - 1.0
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} else {
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0.0
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}
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}
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fn tick(&mut self) {
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if self.freq_timer != 0 {
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self.freq_timer -= 1;
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}
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if self.freq_timer == 0 {
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self.freq_timer = (2048 - self.frequency()) * 4;
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self.duty_pos = (self.duty_pos + 1) % 8;
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}
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}
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fn frequency(&self) -> u16 {
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(self.freq_hi.freq_bits() as u16) << 8 | self.freq_lo as u16
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}
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fn is_dac_enabled(&self) -> bool {
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self.envelope.0 & 0xF8 != 0x00
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}
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}
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#[derive(Debug, Default)]
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pub(crate) struct Channel3 {
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/// 0xFF1A | NR30 - Channel 3 Sound on/off
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dac_enabled: bool,
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enabled: bool,
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/// 0xFF1B | NR31 - Sound Length
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len: u8,
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/// 0xFF1C | NR32 - Channel 3 Volume
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@ -678,8 +647,6 @@ pub(crate) struct Channel3 {
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freq_timer: u16,
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offset: u8,
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enabled: bool,
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}
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impl BusIo for Channel3 {
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@ -704,17 +671,13 @@ impl Channel3 {
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const WAVE_RAM_START_ADDR: u16 = 0xFF30;
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/// 0xFF1A | NR30 - Channel 3 Sound on/off
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pub(crate) fn dac_enabled(&self) -> u8 {
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((self.dac_enabled as u8) << 7) | 0x7F
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pub(crate) fn enabled(&self) -> u8 {
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((self.enabled as u8) << 7) | 0x7F
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}
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/// 0xFF1A | NR30 - Channel 3 Sound on/off
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pub(crate) fn set_dac_enabled(&mut self, byte: u8) {
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self.dac_enabled = (byte >> 7) & 0x01 == 0x01;
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if !self.dac_enabled {
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self.enabled = false;
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}
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pub(crate) fn set_enabled(&mut self, byte: u8) {
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self.enabled = (byte >> 7) & 0x01 == 0x01;
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}
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/// 0xFF1B | NR31 - Sound Length
|
||||
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@ -761,13 +724,18 @@ impl Channel3 {
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self.length_timer = 256;
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}
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if self.dac_enabled {
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self.enabled = true;
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}
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}
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fn amplitude(&self) -> f32 {
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let dac_input =
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(self.read_sample(self.offset) >> self.volume.shift_count()) * self.enabled as u8;
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(dac_input as f32 / 7.5) - 1.0
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}
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fn tick(&mut self) {
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fn clock(&mut self) {
|
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if self.freq_timer != 0 {
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self.freq_timer -= 1;
|
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}
|
||||
|
|
@ -778,15 +746,6 @@ impl Channel3 {
|
|||
}
|
||||
}
|
||||
|
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fn amplitude(&self) -> f32 {
|
||||
if self.dac_enabled && self.enabled {
|
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let input = self.read_sample(self.offset) >> self.volume.shift_count();
|
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(input as f32 / 7.5) - 1.0
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} else {
|
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0.0
|
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}
|
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}
|
||||
|
||||
fn read_sample(&self, index: u8) -> u8 {
|
||||
let i = (index / 2) as usize;
|
||||
|
||||
|
|
@ -844,11 +803,7 @@ impl Channel4 {
|
|||
|
||||
/// 0xFF21 | NR42 - Channel 4 Volume Envelope
|
||||
pub(crate) fn set_envelope(&mut self, byte: u8) {
|
||||
self.envelope = byte.into();
|
||||
|
||||
if !self.is_dac_enabled() {
|
||||
self.enabled = false;
|
||||
}
|
||||
self.envelope = byte.into()
|
||||
}
|
||||
|
||||
/// 0xFF22 | NR43 - Chanel 4 Polynomial Counter
|
||||
|
|
@ -883,13 +838,17 @@ impl Channel4 {
|
|||
// LFSR behaviour during trigger event
|
||||
self.lf_shift = 0x7FFF;
|
||||
|
||||
if self.is_dac_enabled() {
|
||||
self.enabled = true;
|
||||
}
|
||||
}
|
||||
|
||||
fn amplitude(&self) -> f32 {
|
||||
let dac_input = (!self.lf_shift & 0x01) as u8 * self.current_volume;
|
||||
|
||||
(dac_input as f32 / 7.5) - 1.0
|
||||
}
|
||||
|
||||
fn tick(&mut self) {
|
||||
fn clock(&mut self) {
|
||||
if self.freq_timer != 0 {
|
||||
self.freq_timer -= 1;
|
||||
}
|
||||
|
|
@ -907,19 +866,6 @@ impl Channel4 {
|
|||
}
|
||||
}
|
||||
|
||||
fn amplitude(&self) -> f32 {
|
||||
if self.is_dac_enabled() && self.enabled {
|
||||
let input = (!self.lf_shift & 0x01) as u8 * self.current_volume;
|
||||
(input as f32 / 7.5) - 1.0
|
||||
} else {
|
||||
0.0
|
||||
}
|
||||
}
|
||||
|
||||
fn is_dac_enabled(&self) -> bool {
|
||||
self.envelope.0 & 0xF8 != 0x00
|
||||
}
|
||||
|
||||
fn divisor(code: u8) -> u8 {
|
||||
if code == 0 {
|
||||
return 8;
|
||||
|
|
|
|||
|
|
@ -48,7 +48,7 @@ impl<T> SampleProducer<T> {
|
|||
self.inner.slots() > 2
|
||||
}
|
||||
|
||||
pub(crate) fn available_blocking(&self) -> bool {
|
||||
pub(crate) fn available_block(&self) -> bool {
|
||||
loop {
|
||||
if self.inner.slots() > 2 {
|
||||
break true;
|
||||
|
|
|
|||
|
|
@ -73,7 +73,7 @@ pub(crate) mod ch1 {
|
|||
}
|
||||
}
|
||||
|
||||
pub(super) mod ch3 {
|
||||
pub(crate) mod ch3 {
|
||||
#[derive(Debug, Clone, Copy)]
|
||||
pub(crate) enum Volume {
|
||||
Mute = 0,
|
||||
|
|
@ -102,7 +102,7 @@ pub(super) mod ch3 {
|
|||
}
|
||||
}
|
||||
|
||||
pub(super) mod ch4 {
|
||||
pub(crate) mod ch4 {
|
||||
use super::bitfield;
|
||||
|
||||
bitfield! {
|
||||
|
|
@ -217,7 +217,7 @@ pub(super) mod ch4 {
|
|||
}
|
||||
}
|
||||
|
||||
pub(super) mod common {
|
||||
pub(crate) mod common {
|
||||
use super::bitfield;
|
||||
|
||||
bitfield! {
|
||||
|
|
@ -508,52 +508,3 @@ impl From<ChannelControl> for u8 {
|
|||
ctrl.0
|
||||
}
|
||||
}
|
||||
|
||||
pub(super) mod fs {
|
||||
#[derive(Debug)]
|
||||
pub(crate) struct FrameSequencer {
|
||||
step: u8,
|
||||
state: State,
|
||||
}
|
||||
|
||||
impl Default for FrameSequencer {
|
||||
fn default() -> Self {
|
||||
Self {
|
||||
step: Default::default(),
|
||||
state: State::Length,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl FrameSequencer {
|
||||
pub(crate) fn next(&mut self) {
|
||||
use State::*;
|
||||
|
||||
self.step = (self.step + 1) % 8;
|
||||
self.state = match self.step {
|
||||
1 | 3 | 5 => Nothing,
|
||||
0 | 4 => Length,
|
||||
2 | 6 => LengthAndSweep,
|
||||
7 => Envelope,
|
||||
_ => unreachable!("Step {} is invalid for the Frame Sequencer", self.step),
|
||||
};
|
||||
}
|
||||
|
||||
pub(crate) fn state(&self) -> State {
|
||||
self.state
|
||||
}
|
||||
|
||||
pub(crate) fn reset(&mut self) {
|
||||
self.step = Default::default();
|
||||
self.state = State::Length;
|
||||
}
|
||||
}
|
||||
|
||||
#[derive(Debug, Clone, Copy)]
|
||||
pub(crate) enum State {
|
||||
Length,
|
||||
Nothing,
|
||||
LengthAndSweep,
|
||||
Envelope,
|
||||
}
|
||||
}
|
||||
|
|
|
|||
18
src/main.rs
18
src/main.rs
|
|
@ -63,16 +63,16 @@ fn main() -> Result<()> {
|
|||
};
|
||||
|
||||
// Initialize Audio
|
||||
let spsc: AudioSPSC<f32> = Default::default();
|
||||
let (prod, cons) = spsc.init();
|
||||
let (_stream, stream_handle) = OutputStream::try_default().expect("Initialized Audio");
|
||||
let sink = Sink::try_new(&stream_handle)?;
|
||||
sink.append(cons);
|
||||
game_boy.apu_mut().attach_producer(prod);
|
||||
// let spsc: AudioSPSC<f32> = Default::default();
|
||||
// let (prod, cons) = spsc.init();
|
||||
// let (_stream, stream_handle) = OutputStream::try_default().expect("Initialized Audio");
|
||||
// let sink = Sink::try_new(&stream_handle)?;
|
||||
// sink.append(cons);
|
||||
// game_boy.apu_mut().set_producer(prod);
|
||||
|
||||
std::thread::spawn(move || {
|
||||
sink.sleep_until_end();
|
||||
});
|
||||
// std::thread::spawn(move || {
|
||||
// sink.sleep_until_end();
|
||||
// });
|
||||
|
||||
let mut start = Instant::now();
|
||||
let frame_time = Duration::from_secs_f64(1.0 / 59.73); // 59.73 Hz on Host
|
||||
|
|
|
|||
Loading…
Reference in New Issue