016a171a35
Another dependency the app should not be asking the platform for:
- audio_decode — MP3 (layer 3, LSF tables, synthesis) and Ogg Vorbis
(codebooks, floor, residue, MDCT) decoders, with tag reading. Both are
checked against oracle fixtures rather than against our own expectations.
- audio_encode — an Ogg Vorbis encoder: MDCT, psychoacoustics, floor and
Huffman coding, setup tables, plus `oggenc` and `audiobench` binaries.
- audio_picture — waveform and spectrogram rendering, and compositing.
- audio_lyrics — word-level lyric alignment (DTW plus a DP snap) and the
baked schema behind karaoke timing.
- audio_sidechannels — the side-channel plumbing between them.
libs/voice grows a CUDA backend and an alignment path beside its CPU decoder,
with a `whisper_parity` binary to keep the two honest.
29 lines
1.2 KiB
Rust
29 lines
1.2 KiB
Rust
//! Ogg Vorbis encoder, written from scratch beside this repo's own decoder
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//! (`makepad-audio-decode`), which is also its round-trip oracle. No
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//! dependencies beyond that crate, no `unsafe`.
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//!
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//! Built for one job done fast: turning separated stems and other baked
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//! audio into near-transparent ~256 kbit/s side-channel files. The shape is
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//! deliberately simple — a single 1024-sample block size, floor 1 fitted to
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//! a masking estimate, residue type 1 with amplitude-graded classes, and
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//! per-file Huffman codebooks built from the track's own symbol counts in a
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//! two-pass encode. Both passes parallelise over blocks; only pagination is
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//! serial. Output is deterministic: the same PCM and options give the same
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//! bytes, so content-addressed stores dedupe re-encodes for free.
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//!
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//! ```no_run
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//! let pcm = vec![0f32; 44_100 * 2]; // one second of interleaved stereo
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//! let opts = makepad_audio_encode::EncodeOptions::default();
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//! let ogg = makepad_audio_encode::encode_vorbis(44_100, 2, &pcm, &opts).unwrap();
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//! ```
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pub mod bits;
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pub mod encode;
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pub mod floor_enc;
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pub mod huffman;
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pub mod mdct;
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pub mod ogg;
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pub mod psy;
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pub mod setup;
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pub use encode::{encode_vorbis, EncodeError, EncodeOptions};
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