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LibAudio: Implement the Quite Okay Audio format

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Brought to you by the inventor of QOI, QOA is a lossy audio codec that
is, as the name says, quite okay in compressing audio data reasonably
well without frequency transformation, mostly introducing some white
noise in the background. This implementation of QOA is fully compatible
with the qoa.h reference implementation as of 2023-02-25. Note that
there may be changes to the QOA format before a specification is
finalized, and there is currently no information on when that will
happen and which changes will be made.

This implementation of QOA can handle varying sample rate and varying
channel count files. The reference implementation does not produce these
files and cannot handle them, so their implementation is untested.

The QOA loader is capable of seeking in constant-bitrate streams.

QOA links:
https://phoboslab.org/log/2023/02/qoa-time-domain-audio-compression
https://github.com/phoboslab/qoa
This commit is contained in:
kleines Filmröllchen 2023-02-02 17:28:57 +01:00 • committed by Andrew Kaster
parent 3c65c22728
commit 0b421a3764
6 changed files with 542 additions and 1 deletions
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15
Userland/Libraries/LibAudio/Loader.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2018-2021, the SerenityOS developers.
* Copyright (c) 2018-2023, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -7,6 +7,7 @@
#include <LibAudio/FlacLoader.h>
#include <LibAudio/Loader.h>
#include <LibAudio/MP3Loader.h>
#include <LibAudio/QOALoader.h>
#include <LibAudio/WavLoader.h>
namespace Audio {
@ -41,6 +42,12 @@ Result<NonnullOwnPtr<LoaderPlugin>, LoaderError> Loader::create_plugin(StringVie
return NonnullOwnPtr<LoaderPlugin>(plugin.release_value());
}
{
auto plugin = QOALoaderPlugin::create(path);
if (!plugin.is_error())
return NonnullOwnPtr<LoaderPlugin>(plugin.release_value());
}
return LoaderError { "No loader plugin available" };
}
@ -64,6 +71,12 @@ Result<NonnullOwnPtr<LoaderPlugin>, LoaderError> Loader::create_plugin(Bytes buf
return NonnullOwnPtr<LoaderPlugin>(plugin.release_value());
}
{
auto plugin = QOALoaderPlugin::create(buffer);
if (!plugin.is_error())
return NonnullOwnPtr<LoaderPlugin>(plugin.release_value());
}
return LoaderError { "No loader plugin available" };
}