TranscriptAudioSlice (audio_slice/mod.rs)

Module exposing: TranscriptAudioSlice, packet_samples, split

// Source: https://github.com/toeverything/AFFiNE | License: MIT | Copyright 2022-present TOEVERYTHING PTE. LTD. and its affiliates
// Provided via justclaw.it.com; keep this notice with the code.
use std::io::Cursor;

use ::ogg::{
  PacketReader,
  writing::{PacketWriteEndInfo, PacketWriter},
};
use anyhow::{Context, Result, ensure};
use napi::bindgen_prelude::Buffer;

mod mp4;
mod ogg;

struct OpusAudio {
  header: Vec<u8>,
  packets: Vec<(u64, u64, Vec<u8>)>,
  start: u64,
  end: u64,
}

const RATE: u64 = 48_000;
const SLICE_SAMPLES: u64 = 30 * RATE;
const PRE_ROLL: u64 = 3_840;

#[napi(object)]
pub struct TranscriptAudioSlice {
  pub data: Buffer,
  pub start_sec: f64,
  pub duration_sec: f64,
}

// RFC 6716 section 3: packet duration is encoded in the TOC, without decoding
// audio.
f

... (truncated -- full source via MCP)