guzijian / wvp-GB28181-pro · Files

G711Player.js 269 Bytes
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// G.711A (PCMA) 解码查找表
const PCMA_TO_PCM = new Int16Array(256);
for (let i = 0; i < 256; i++) {
  let s = ~i;
  let t = ((s & 0x0f) << 3) + 8;
  let seg = (s & 0x70) >> 4;
  if (seg > 0) t = (t + 0x100) << (seg - 1);
  PCMA_TO_PCM[i] = (s & 0x80) ? -t : t;
}