exAudio.cpp

1#include <oa/oa.h>
2
3OA_MAIN_PREVIEW("ExampleAudio") {
4	auto audioResult = oa::FnAudio::decodeFile(oa::Paths::asset("audio/oaNarration.wav"));
5	if (not audioResult.isOk()) {
6		return 1;
7	}
8	auto audio = oa::move(audioResult).getValue();
9
10	auto mono = oa::FnAudio::toMono(audio);
11
12	auto normalized = oa::FnAudio::normalize(mono, -3.0F);
13
14	auto faded = oa::FnAudio::fade(normalized, 2400U, 2400U);
15
16	auto reverberated = oa::FnAudio::reverb(faded, 1.5F, 0.4F);
17
18	const oa::Path output = oa::Paths::var("example/audio/oaNarrationRoom.wav");
19	if (not oa::Filesystem::createDirectories(output.parentPath()).isOk()) {
20		return 1;
21	}
22	if (not oa::FnAudio::saveWavF32(output, reverberated).isOk()) {
23		return 1;
24	}
25
26	if (not reverberated.validate()) return 1;
27	if (reverberated.sampleRate() != 24000U) return 1;
28	if (reverberated.channels() != 1) return 1;
29	if (reverberated.samples() != faded.samples()
30		+ static_cast<oa::I64>(reverberated.sampleRate())
31			* 1500 / 1'000) {
32		return 1;
33	}
34	if (not oa::Filesystem::isFile(output)) return 1;
35
36	oa::print("Saved reverberated audio (1.5 s tail): {}", output.cStr());
37
38	if (argc > 1 and oa::StringView(argv[1]) == "--preview") {
39		oa::ViewerConfig previewConfig;
40		previewConfig.mode = oa::ViewerMode::Audio;
41		previewConfig.title = "OA audio · room reverb";
42		previewConfig.width = 960U;
43		previewConfig.height = 360U;
44		if (not oa::Viewer::preview(engine, oa::Paths::var("example/audio/oaNarrationRoom.wav").string(),
45			previewConfig).isOk()) {
46			return 1;
47		}
48	}
49	return 0;
50}
51