48 lines
951 B
Rust
48 lines
951 B
Rust
//! Sounds file audio type.
|
|
|
|
use crate::{err::*, sound::Sound16};
|
|
|
|
/// Reads a sound.
|
|
pub fn read(b: &[u8]) -> ResultS<Sound16>
|
|
{
|
|
read_data! {
|
|
endian: BIG, buf: b, size: 21, start: 0, data {
|
|
let len = u32[4] usize;
|
|
let rate = u16[8];
|
|
let lp_beg = u32[12] usize;
|
|
let lp_end = u32[16] usize;
|
|
let magic = u8[20];
|
|
}
|
|
}
|
|
|
|
match magic {
|
|
0 => {
|
|
let stream = &b[22..22 + len];
|
|
Ok(Sound16::new_from_8(rate, lp_beg, lp_end, stream))
|
|
}
|
|
0xFF => {
|
|
read_data! {
|
|
endian: BIG, buf: b, size: 42, start: 22, data {
|
|
let len = u32[0] usize;
|
|
let bps = u16[26];
|
|
}
|
|
}
|
|
|
|
match bps {
|
|
16 => {
|
|
let stream = &b[63..63 + len * 2];
|
|
Ok(Sound16::new_from_16(rate, lp_beg, lp_end, stream))
|
|
}
|
|
8 => {
|
|
let stream = &b[63..63 + len];
|
|
Ok(Sound16::new_from_8(rate, lp_beg, lp_end, stream))
|
|
}
|
|
_ => bail!("bad bits per sample"),
|
|
}
|
|
}
|
|
_ => bail!("invalid magic number"),
|
|
}
|
|
}
|
|
|
|
// EOF
|