ex_audio.rs

1use anyhow::Context;
2use oa::{Engine, Filesystem, Path, audio};
3
4fn main() -> anyhow::Result<()> {
5	let engine = Engine::new().context("create OA engine")?;
6
7	let audio_path = Path::asset_rel("audio/oaNarration.wav");
8
9	let output = Path::var_rel("example/audio/oaNarrationRoom.wav");
10	Filesystem::create_directories(&output.parent().unwrap())?;
11
12	let source = audio::decode_file(&engine, &audio_path)
13		.with_context(|| format!("decode {}", audio_path.display()))?;
14	let mono = audio::to_mono(&source)?;
15	let normalized = audio::normalize(
16		&mono,
17		audio::NormalizeAudioConfig {
18			target_db: -3.0,
19			..Default::default()
20		},
21	)?;
22	let faded = audio::fade(&normalized, 2400, 2400)?;
23	let reverberated = audio::reverb(&faded, 1.5, 0.4)?;
24	audio::save_wav_f32(&output, &reverberated)?;
25
26	assert!(reverberated.channels() == 1);
27	assert!(output.is_file());
28
29	println!(
30		"Saved reverberated audio (1.5 s tail): {}",
31		output.display()
32	);
33	Ok(())
34}
35