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Sample rate of 48000

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This commit is contained in:
Franco Colmenarez 2021-12-21 14:32:03 -05:00
parent 060dbde966
commit d6ef80afe4
1 changed files with 9 additions and 19 deletions
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28
src/sound.rs
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@ -1,7 +1,7 @@
use std::env;
use std::ops::RangeInclusive;
use std::sync::{Arc, Mutex};
use cpal::{Stream, StreamConfig, Device, Sample};
use cpal::{Stream, StreamConfig, Device, Sample, SampleRate};
use cpal::traits::{DeviceTrait, HostTrait, StreamTrait};
use crate::cpu::Cycles;
use crate::utils::join_bytes;
@ -34,6 +34,8 @@ pub const NR52_ADDRESS: u16 = 0xFF26;
pub const WAVE_PATTERN_RAM: RangeInclusive<u16> = 0xFF30..=0xFF3F;
pub const SAMPLE_RATE: u32 = 48000;
const WAVE_DUTY_PATTERNS: [[u8; 8]; 4] = [
[0, 0, 0, 0, 0, 0, 0, 1],
[0, 0, 0, 0, 0, 0, 1, 1],
@ -48,25 +50,15 @@ struct ChannelTwo {
frequency_timer: u16,
duty_position: usize,
sample_timer: usize,
sample_rate: usize,
buffer_pos: usize,
}
impl ChannelTwo {
pub fn new(device: &Device, config: &StreamConfig, sample_rate: usize) -> Self {
pub fn new(device: &Device, config: &StreamConfig) -> Self {
let mut count: usize = 0;
// let mut count: f32 = 0.0;
let buffer = Arc::new(Mutex::new(vec![0.0; sample_rate]));
let buffer = Arc::new(Mutex::new(vec![0.0; SAMPLE_RATE as usize]));
let buffer_clone = buffer.clone();
let stream = device.build_output_stream(&config, move |data: &mut [f32], _| {
/* for sample in data.iter_mut() {
let y: f32 = ((count / (sample_rate as f32)) * 440.0 * 2.0 * 3.14159).sin().clamp(-1.0, 1.0);
*sample = Sample::from(&y);
count += 1.0;
if count >= sample_rate as f32 {
count = 0.0;
}
} */
let b = buffer_clone.lock().unwrap();
for sample in data.iter_mut() {
*sample = Sample::from(&b[count]);
@ -84,7 +76,6 @@ impl ChannelTwo {
duty_position: 0,
sample_timer: 0,
buffer_pos: 0,
sample_rate,
buffer,
}
}
@ -114,10 +105,10 @@ impl ChannelTwo {
self.duty_position = 0;
}
}
self.sample_timer = self.sample_timer.saturating_add(self.sample_rate);
self.sample_timer = self.sample_timer.saturating_add(SAMPLE_RATE as usize);
if self.sample_timer >= 4194304 {
self.update_buffer(duty);
self.sample_timer = 0;
self.sample_timer -= 4194304;
}
}
}
@ -148,13 +139,12 @@ impl Sound {
.expect("error while querying configs");
let supported_config = supported_configs_range.next()
.expect("no supported config?!")
.with_max_sample_rate();
.with_sample_rate(SampleRate(SAMPLE_RATE));
// let err_fn = |err| eprintln!("an error occurred on the output audio stream: {}", err);
let sample_rate = supported_config.sample_rate().0;
let config: StreamConfig = supported_config.into();
return Self {
io_registers: [0; 48],
channel_two: Some(ChannelTwo::new(&device, &config, sample_rate as usize)),
channel_two: Some(ChannelTwo::new(&device, &config)),
};
}