antonlyap/bliss-rs
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Return the version in little endian

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Anton Liaposhchenko 2023-12-28 17:47:35 +02:00
parent 082e8b6596
commit f06461313e
3 changed files with 4 additions and 4 deletions
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2
README.md
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@ -14,7 +14,7 @@ await analyze("/path/to/track.mp3") // returns Uint8Array
``` ```
## Return value ## Return value
The output of `bliss-rs` consists of single-precision floats, currently 20 of them. This fork contains code to convert it into an array of 80 bytes in little endian order. An additional version (also comes from `bliss-rs`, currently equal to `1`) is prepended at the start as 16 bits in platform endianness. Therefore, the total output size is 82 bytes. The output of `bliss-rs` consists of single-precision floats, currently 20 of them. This fork contains code to convert it into an array of 80 bytes in little endian order. An additional version (also comes from `bliss-rs`, currently equal to `1`) is prepended at the start (16-bit unsigned little-endian integer). Therefore, the total output size is 82 bytes.
### Usage ### Usage
The output (without the version) is meant to be converted back into floats and used to calculate the [Euclidean distance](https://en.wikipedia.org/wiki/Euclidean_distance#Higher_dimensions) between two songs. Other distance algorithms are being worked on by the Bliss team. The output (without the version) is meant to be converted back into floats and used to calculate the [Euclidean distance](https://en.wikipedia.org/wiki/Euclidean_distance#Higher_dimensions) between two songs. Other distance algorithms are being worked on by the Bliss team.

2
package.json
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@ -1,6 +1,6 @@
{ {
"name": "@bliss-rs/bliss-rs", "name": "@bliss-rs/bliss-rs",
"version": "0.0.2", "version": "0.0.3",
"description": "A fork of the bliss-rs library with Node.js bindings", "description": "A fork of the bliss-rs library with Node.js bindings",
"main": "index.js", "main": "index.js",
"types": "index.d.ts", "types": "index.d.ts",

4
src/lib.rs
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@ -44,7 +44,7 @@ fn analyze_async(mut cx: FunctionContext) -> JsResult<JsPromise> {
Ok(promise) Ok(promise)
} }
/// Returns a Uint8Array, with the first 2 bytes being the version in platform endianness /// Returns a Uint8Array, with the first 2 bytes being the version (16-bit unsigned little endian)
/// and the rest (currently 80 bytes) being the analysis data in little endian /// and the rest (currently 80 bytes) being the analysis data in little endian
fn analyze(mut cx: FunctionContext) -> JsResult<JsUint8Array> { fn analyze(mut cx: FunctionContext) -> JsResult<JsUint8Array> {
let path = cx.argument::<JsString>(0)?.value(&mut cx); let path = cx.argument::<JsString>(0)?.value(&mut cx);
@ -65,7 +65,7 @@ fn analyze(mut cx: FunctionContext) -> JsResult<JsUint8Array> {
fn analyze_raw(path: &str) -> BlissResult<([u8; 2], [u8; 80])> { fn analyze_raw(path: &str) -> BlissResult<([u8; 2], [u8; 80])> {
let song = Song::from_path(path)?; let song = Song::from_path(path)?;
let version_bytes = song.features_version.to_ne_bytes(); let version_bytes = song.features_version.to_le_bytes();
let analysis_bytes = song.analysis.as_bytes(); let analysis_bytes = song.analysis.as_bytes();
Ok((version_bytes, analysis_bytes)) Ok((version_bytes, analysis_bytes))
} }