1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
#[cfg(all(feature = "music", not(feature = "32k")))]
use sdl2::audio::AudioCallback;
#[cfg(all(feature = "music", not(feature = "32k")))]
use crate::vendored::micromod::MmC2r;
#[cfg(all(feature = "music", not(feature = "32k")))]
pub struct Music {
pub pcm: Vec<i16>,
pub offset: usize,
}
#[cfg(all(feature = "music", not(feature = "32k")))]
impl AudioCallback for Music {
type Channel = f32;
fn callback(&mut self, out_f: &mut [f32]) {
let len = out_f.len();
let slice = &self.pcm[self.offset..(self.offset + len).min(self.pcm.len() - 1)];
let len = slice.len();
pcm_to_f32pcm(&slice, out_f, len);
self.offset += len;
if self.offset > self.pcm.len() {
self.offset = 0;
}
}
}
#[cfg(all(feature = "music", not(feature = "32k")))]
pub fn mmc2r_to_pcm(state: &mut MmC2r) -> Vec<i16> {
let mut destination = Vec::<i16>::new();
loop {
let mut out = [0; 4096];
if !state.get_audio(&mut out, 2048) {
break;
}
for sample in out {
destination.push(sample);
}
}
destination
}
#[cfg(all(feature = "music", not(feature = "32k")))]
pub fn pcm_to_f32pcm(input: &[i16], output: &mut [f32], len: usize) {
for i in 0..len {
output[i] = f32::from(input[i]) / f32::from(0x7FFF as i16);
}
}
|
