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Read Normalisation Data in one go

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Read all the Normalisation Data in one shot to avoid 4 seperate reads.
This commit is contained in:
JasonLG1979 2023-05-13 13:00:50 -05:00
parent 31d18f7e30
commit f89c622e30
1 changed files with 14 additions and 9 deletions
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23
playback/src/player.rs
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@ -15,7 +15,6 @@ use std::{
time::{Duration, Instant},
};
use byteorder::{LittleEndian, ReadBytesExt};
use futures_util::{
future, future::FusedFuture, stream::futures_unordered::FuturesUnordered, StreamExt,
TryFutureExt,
@ -306,29 +305,35 @@ impl Default for NormalisationData {
impl NormalisationData {
fn parse_from_ogg<T: Read + Seek>(mut file: T) -> io::Result<NormalisationData> {
const SPOTIFY_NORMALIZATION_HEADER_START_OFFSET: u64 = 144;
const NORMALISATION_DATA_SIZE: usize = 16;
let newpos = file.seek(SeekFrom::Start(SPOTIFY_NORMALIZATION_HEADER_START_OFFSET))?;
if newpos != SPOTIFY_NORMALIZATION_HEADER_START_OFFSET {
error!(
"NormalisationData::parse_from_file seeking to {} but position is now {}",
SPOTIFY_NORMALIZATION_HEADER_START_OFFSET, newpos
);
error!("Falling back to default (non-track and non-album) normalisation data.");
return Ok(NormalisationData::default());
}
let track_gain_db = file.read_f32::<LittleEndian>()? as f64;
let track_peak = file.read_f32::<LittleEndian>()? as f64;
let album_gain_db = file.read_f32::<LittleEndian>()? as f64;
let album_peak = file.read_f32::<LittleEndian>()? as f64;
let mut buf = [0u8; NORMALISATION_DATA_SIZE];
let r = NormalisationData {
file.read_exact(&mut buf)?;
let track_gain_db = f32::from_le_bytes([buf[0], buf[1], buf[2], buf[3]]) as f64;
let track_peak = f32::from_le_bytes([buf[4], buf[5], buf[6], buf[7]]) as f64;
let album_gain_db = f32::from_le_bytes([buf[8], buf[9], buf[10], buf[11]]) as f64;
let album_peak = f32::from_le_bytes([buf[12], buf[13], buf[14], buf[15]]) as f64;
Ok(Self {
track_gain_db,
track_peak,
album_gain_db,
album_peak,
};
Ok(r)
})
}
fn get_factor(config: &PlayerConfig, data: NormalisationData) -> f64 {