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Add noise generators and improve their distribution #755

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b90ad08
Add noise generators and improve their distribution
roderickvd Jun 13, 2025
377fbb9
refactor: rename and rework noise generators API, update tests
roderickvd Jul 3, 2025
c951a94
refactor: clippy fixes
roderickvd Jul 3, 2025
53ba550
style: rustfmt
roderickvd Jul 3, 2025
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11 changes: 10 additions & 1 deletion CHANGELOG.md
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Original file line number Diff line number Diff line change
Expand Up @@ -33,6 +33,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
`OutputStreamConfig::buffer_size()` and `OutputStreamConfig::sample_format()` getters to access
an `OutputStreamConfig`'s channel count, sample rate, buffer size and sample format values.
- Added `Source::limit()` method for limiting the maximum amplitude of a source.
- Added more noise generators: `WhiteGaussian`, `WhiteTriangular`, `Blue`, `Brownian`, `Violet`,
and `Velvet`.

### Changed
- Breaking: `OutputStreamBuilder` should now be used to initialize an audio output stream.
Expand All @@ -54,6 +56,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
- Support for decoding MP4 containers with AAC audio is now enabled by default.
- Breaking: As optional features are now available: CAF and MKV containers, MP1/MP2 and ADPCM
decoders. Previously, the ADPCM decoder was enabled when `symphonia-wav` was.
- docs.rs will now document all features, including those that are not enabled by default.
- Breaking: `WhiteNoise` and `PinkNoise` have been renamed to `noise::WhiteUniform` and
`noise::Pink`.
- `noise::Pink` is not deterministically seekable, so will now return `Err` when seeking.

### Fixed
- `ChannelVolume` no longer clips/overflows when converting from many channels to
Expand All @@ -67,9 +73,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
- `LoopedDecoder::size_hint` now correctly indicates an infinite stream.
- Symphonia decoder `total_duration` for Vorbis now return the correct value (#696).
- Symphonia decoder for MP4 now seeks correctly (#577).
- White noise was not correctly uniformly distributed.
- Pink noise was not correctly distributed on sampling rates other than 44100 Hz.

### Deprecated
- Deprecated `Sample::zero_value()` function in favor of `Sample::ZERO_VALUE` constant
- Deprecated `Sample::zero_value()` function in favor of `Sample::ZERO_VALUE` constant.
- Deprecated `white()` and `pink()` methods in favor of `noise::WhiteUniform::new()` and `noise::Pink::new()`.

### Removed
- Breaking: Removed `Mp4Type` enum in favor of using MIME type string "audio/mp4" for MP4 format detection with `Decoder::new_mp4` (#612).
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