46 lines
1.1 KiB
Rust
46 lines
1.1 KiB
Rust
//! RIFF WAVE format sounds.
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use crate::{err::*, sound::*};
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use std::io;
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/// Writes a WAVE file from a sound.
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///
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/// # Errors
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///
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/// Errors if `out` cannot be written to.
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pub fn write_wav(out: &mut impl io::Write, snd: &impl Sound) -> ResultS<()>
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{
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let smp_rate = u32::from(snd.rate());
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let smp_size = smp_rate * 2;
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let dat_size = snd.len() as u32 * 2;
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out.write_all(b"RIFF")?;
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out.write_all(&u32::to_le_bytes(36 + dat_size))?;
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out.write_all(b"WAVE")?;
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out.write_all(b"fmt ")?;
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out.write_all(&u32::to_le_bytes(16))?;
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// PCM
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out.write_all(&u16::to_le_bytes(1))?;
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// mono
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out.write_all(&u16::to_le_bytes(1))?;
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out.write_all(&u32::to_le_bytes(smp_rate))?;
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out.write_all(&u32::to_le_bytes(smp_size))?;
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// block alignment
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out.write_all(&u16::to_le_bytes(2))?;
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// bits per sample
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out.write_all(&u16::to_le_bytes(16))?;
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out.write_all(b"data")?;
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out.write_all(&u32::to_le_bytes(dat_size))?;
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for p in 0..snd.len() {
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let sample = snd.index(p);
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out.write_all(&sample.to_le_bytes())?;
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}
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Ok(())
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}
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// EOF
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