@evan/wasm/target/opus/node.cjs

set of wasm modules

var __defProp = Object.defineProperty;
var __markAsModule = (target) => __defProp(target, "__esModule", { value: true });
var __export = (target, all) => {
  __markAsModule(target);
  for (var name in all)
    __defProp(target, name, { get: all[name], enumerable: true });
};
var __accessCheck = (obj, member, msg) => {
  if (!member.has(obj))
    throw TypeError("Cannot " + msg);
};
var __privateGet = (obj, member, getter) => {
  __accessCheck(obj, member, "read from private field");
  return getter ? getter.call(obj) : member.get(obj);
};
var __privateAdd = (obj, member, value) => {
  if (member.has(obj))
    throw TypeError("Cannot add the same private member more than once");
  member instanceof WeakSet ? member.add(obj) : member.set(obj, value);
};
var __privateSet = (obj, member, value, setter) => {
  __accessCheck(obj, member, "write to private field");
  setter ? setter.call(obj, value) : member.set(obj, value);
  return value;
};
__export(exports, {
  Decoder: () => Decoder,
  Encoder: () => Encoder,
  ctl: () => ctl
});
var _ptr, _ptr2;
let u8;
let wasm;
let pptr;
let bptr;
let pptrs;
let bptrs;
{
  const module2 = new WebAssembly.Module(require('fs').readFileSync(require('path').join(__dirname, '../../src/opus/opus.wasm')));
  const instance = new WebAssembly.Instance(module2, {
    wasi_snapshot_preview1: { fd_seek() {
    }, fd_write() {
    }, fd_close() {
    }, proc_exit() {
    } },
    env: {
      emscripten_notify_memory_growth() {
        u8 = new Uint8Array(wasm.memory.buffer);
        pptrs = u8.subarray(pptr, pptr + 2 ** 13);
        bptrs = u8.subarray(bptr, bptr + 2 ** 15);
      }
    }
  });
  wasm = instance.exports;
  pptr = wasm.malloc(2 ** 13);
  bptr = wasm.malloc(2 ** 15);
  u8 = new Uint8Array(wasm.memory.buffer);
  pptrs = u8.subarray(pptr, pptr + 2 ** 13);
  bptrs = u8.subarray(bptr, bptr + 2 ** 15);
}
function clamp(min, int, max) {
  const t = int < min ? min : int;
  return t > max ? max : t;
}
function err(code) {
  if (0 > code)
    throw new Error(`opus: ${load_static_string(u8, wasm.opus_strerror(code))}`);
  else
    return code;
}
function cgc(f) {
  return !("FinalizationRegistry" in globalThis) ? { delete(_) {
  }, add(_, __) {
  } } : { r: new FinalizationRegistry(f), delete(k) {
    this.r.unregister(k);
  }, add(k, v) {
    this.r.register(k, v, k);
  } };
}
function load_static_string(u82, ptr) {
  let s = "";
  const l = u82.length | 0;
  for (let o = ptr | 0; o < l; o++) {
    const x = u82[o];
    if (x === 0)
      break;
    s += String.fromCharCode(x);
  }
  return s;
}
const ctl = {
  auto: -1e3,
  bitrate_max: -1,
  reset_state: 4028,
  signal: {
    auto: -1e3,
    voice: 3001,
    music: 3002
  },
  application: {
    voip: 2048,
    audio: 2049,
    restricted_lowdelay: 2051
  },
  bandwidth: {
    auto: -1e3,
    wideband: 1103,
    fullband: 1105,
    narrowband: 1101,
    mediumband: 1102,
    superwideband: 1104
  },
  framesize: {
    5: 5002,
    10: 5003,
    20: 5004,
    40: 5005,
    60: 5006,
    80: 5007,
    100: 5008,
    120: 5009,
    [2.5]: 5001,
    arg: 5e3
  },
  set: {
    vbr: 4006,
    dtx: 4016,
    gain: 4034,
    signal: 4024,
    bitrate: 4002,
    bandwidth: 4008,
    lsb_depth: 4036,
    complexity: 4010,
    inband_fec: 4012,
    application: 4e3,
    max_bandwidth: 4004,
    vbr_constraint: 4020,
    force_channels: 4022,
    packet_loss_perc: 4014,
    prediction_disabled: 4042,
    expert_frame_duration: 4040,
    phase_inversion_disabled: 4046
  },
  get: {
    vbr: 4007,
    dtx: 4017,
    gain: 4045,
    pitch: 4033,
    signal: 4025,
    in_dtx: 4049,
    bitrate: 4003,
    lsb_depth: 4037,
    bandwidth: 4009,
    lookahead: 4027,
    complexity: 4011,
    inband_fec: 4013,
    application: 4001,
    sample_rate: 4029,
    final_range: 4031,
    max_bandwidth: 4005,
    vbr_constraint: 4021,
    force_channels: 4023,
    packet_loss_perc: 4015,
    prediction_disabled: 4043,
    last_packet_duration: 4039,
    expert_frame_duration: 4041,
    phase_inversion_disabled: 4047
  }
};
const convert = {
  fc: {
    1: 1,
    2: 2,
    "auto": [ctl.auto],
    [ctl.auto]: "auto"
  },
  s: {
    [ctl.auto]: "auto",
    [ctl.signal.voice]: "voice",
    [ctl.signal.music]: "music"
  },
  a: {
    [ctl.application.voip]: "voip",
    [ctl.application.audio]: "audio",
    [ctl.application.restricted_lowdelay]: "restricted_lowdelay"
  },
  b: {
    [ctl.auto]: "auto",
    [ctl.bandwidth.wideband]: "wideband",
    [ctl.bandwidth.fullband]: "fullband",
    [ctl.bandwidth.narrowband]: "narrowband",
    [ctl.bandwidth.mediumband]: "mediumband",
    [ctl.bandwidth.superwideband]: "superwideband"
  },
  efd: {
    [ctl.framesize[5]]: 5,
    [ctl.framesize[10]]: 10,
    [ctl.framesize[20]]: 20,
    [ctl.framesize[40]]: 40,
    [ctl.framesize[60]]: 60,
    [ctl.framesize[80]]: 80,
    [ctl.framesize[2.5]]: 2.5,
    [ctl.framesize[100]]: 100,
    [ctl.framesize[120]]: 120,
    [ctl.framesize.arg]: "arg"
  }
};
const pptrl = 2 ** 13;
const gc = cgc((ptr) => wasm.free(ptr));
class RawDecoder {
  constructor({ channels, sample_rate }) {
    __privateAdd(this, _ptr, 0);
    gc.add(this, __privateSet(this, _ptr, wasm.malloc(wasm.opus_decoder_get_size(this.channels = channels || 2))));
    try {
      err(wasm.opus_decoder_init(__privateGet(this, _ptr), sample_rate || 48e3, this.channels));
    } catch (e) {
      throw this.drop(), e;
    }
  }
  drop() {
    if (__privateGet(this, _ptr))
      gc.delete(this), wasm.free(__privateGet(this, _ptr)), __privateSet(this, _ptr, 0);
  }
  ctl(cmd, arg) {
    if (arg == null)
      return wasm.opus_decoder_ctl_get(__privateGet(this, _ptr), cmd);
    else
      return err(wasm.opus_decoder_ctl_set(__privateGet(this, _ptr), cmd, arg));
  }
  decode(buffer) {
    pptrs.set(buffer = new Uint8Array(buffer.buffer, buffer.byteOffset, buffer.byteLength));
    return bptrs.slice(0, 2 * this.channels * err(wasm.opus_decode(__privateGet(this, _ptr), pptr, buffer.length, bptr, 5760, 0)));
  }
}
_ptr = new WeakMap();
class RawEncoder {
  constructor({ channels, application, sample_rate }) {
    __privateAdd(this, _ptr2, 0);
    this.channels = channels || 2;
    gc.add(this, __privateSet(this, _ptr2, wasm.malloc(wasm.opus_encoder_get_size(this.channels))));
    application = { voip: 2048, audio: 2049, restricted_lowdelay: 2051 }[application || "audio"];
    try {
      err(wasm.opus_encoder_init(__privateGet(this, _ptr2), sample_rate || 48e3, this.channels, application));
    } catch (e) {
      throw this.drop(), e;
    }
  }
  drop() {
    if (__privateGet(this, _ptr2))
      gc.delete(this), wasm.free(__privateGet(this, _ptr2)), __privateSet(this, _ptr2, 0);
  }
  ctl(cmd, arg) {
    if (arg == null)
      return wasm.opus_encoder_ctl_get(__privateGet(this, _ptr2), cmd);
    else
      return err(wasm.opus_encoder_ctl_set(__privateGet(this, _ptr2), cmd, arg));
  }
  encode(buffer) {
    bptrs.set(buffer = new Uint8Array(buffer.buffer, buffer.byteOffset, buffer.byteLength));
    return pptrs.slice(0, err(wasm.opus_encode(__privateGet(this, _ptr2), bptr, buffer.length / 2 / this.channels, pptr, pptrl)));
  }
}
_ptr2 = new WeakMap();
class Decoder extends RawDecoder {
  constructor({ channels = 2, sample_rate = 48e3 } = {}) {
    super({ channels, sample_rate });
    this.channels = channels;
  }
  get gain() {
    return this.ctl(ctl.get.gain);
  }
  set gain(int) {
    this.ctl(ctl.set.gain, clamp(-32768, int, 32767));
  }
  get pitch() {
    const x = this.ctl(ctl.get.pitch);
    return x === 0 ? null : x;
  }
  get last_packet_duration() {
    return this.ctl(ctl.get.last_packet_duration);
  }
  reset() {
    this.ctl(ctl.reset_state);
  }
  get in_dtx() {
    return !!this.ctl(ctl.get.in_dtx);
  }
  get sample_rate() {
    return this.ctl(ctl.get.sample_rate);
  }
  get bandwidth() {
    return convert.b[this.ctl(ctl.get.bandwidth)];
  }
  get phase_inversion_disabled() {
    return !!this.ctl(ctl.get.phase_inversion_disabled);
  }
  set phase_inversion_disabled(bool) {
    this.ctl(ctl.set.phase_inversion_disabled, bool ? 1 : 0);
  }
}
class Encoder extends RawEncoder {
  constructor({ channels = 2, application, sample_rate = 48e3 } = {}) {
    super({ channels, sample_rate, application: application || "audio" });
    this.channels = channels;
  }
  async *encode_pcm_stream(size, iter) {
    let needle = 0;
    const self = this;
    const r = 2 * size * this.channels;
    const t8 = new Uint8Array(r);
    function* consume(buf) {
      let offset = 0;
      while (offset < buf.length) {
        const s = buf.subarray(offset, offset += r);
        if (r === s.length)
          yield self.encode(s);
        else {
          t8.set(s, needle);
          needle += s.length;
          break;
        }
        ;
      }
    }
    ;
    for await (const buffer of iter) {
      const b8 = new Uint8Array(buffer.buffer, buffer.byteOffset, buffer.byteLength);
      if (needle === 0)
        for (const x of consume(b8))
          yield x;
      else {
        const rr = r - needle;
        if (rr > b8.length)
          t8.set(b8, needle), needle += b8.length;
        else {
          t8.set(b8.subarray(0, rr), needle);
          yield (needle = 0, self.encode(t8));
          for (const x of consume(b8.subarray(rr)))
            yield x;
        }
      }
    }
  }
  reset() {
    this.ctl(ctl.reset_state);
  }
  get in_dtx() {
    return !!this.ctl(ctl.get.in_dtx);
  }
  get sample_rate() {
    return this.ctl(ctl.get.sample_rate);
  }
  get bandwidth() {
    return convert.b[this.ctl(ctl.get.bandwidth)];
  }
  get phase_inversion_disabled() {
    return !!this.ctl(ctl.get.phase_inversion_disabled);
  }
  set phase_inversion_disabled(bool) {
    this.ctl(ctl.set.phase_inversion_disabled, bool ? 1 : 0);
  }
  get vbr() {
    return !!this.ctl(ctl.get.vbr);
  }
  get dtx() {
    return !!this.ctl(ctl.get.dtx);
  }
  get bitrate() {
    return this.ctl(ctl.get.bitrate);
  }
  get lookahead() {
    return this.ctl(ctl.get.lookahead);
  }
  get lsb_depth() {
    return this.ctl(ctl.get.lsb_depth);
  }
  get complexity() {
    return this.ctl(ctl.get.complexity);
  }
  get inband_fec() {
    return !!this.ctl(ctl.get.inband_fec);
  }
  get signal() {
    return convert.s[this.ctl(ctl.get.signal)];
  }
  get packet_loss() {
    return this.ctl(ctl.get.packet_loss_perc);
  }
  get vbr_constraint() {
    return !!this.ctl(ctl.get.vbr_constraint);
  }
  get application() {
    return convert.a[this.ctl(ctl.get.application)];
  }
  get max_bandwidth() {
    return convert.b[this.ctl(ctl.get.max_bandwidth)];
  }
  get force_channels() {
    return convert.fc[this.ctl(ctl.get.force_channels)];
  }
  get prediction_disabled() {
    return !!this.ctl(ctl.get.prediction_disabled);
  }
  get expert_frame_duration() {
    return covert.efd[this.ctl(ctl.get.expert_frame_duration)];
  }
  set vbr(bool) {
    this.ctl(ctl.set.vbr, bool ? 1 : 0);
  }
  set dtx(bool) {
    this.ctl(ctl.set.dtx, bool ? 1 : 0);
  }
  set signal(arg) {
    this.ctl(ctl.set.signal, ctl.signal[arg]);
  }
  set inband_fec(bool) {
    this.ctl(ctl.set.inband_fec, bool ? 1 : 0);
  }
  set lsb_depth(int) {
    this.ctl(ctl.set.lsb_depth, clamp(8, int, 24));
  }
  set bandwidth(arg) {
    this.ctl(ctl.set.bandwidth, ctl.bandwidth[arg]);
  }
  set complexity(int) {
    this.ctl(ctl.set.complexity, clamp(0, int, 10));
  }
  set vbr_constraint(bool) {
    this.ctl(ctl.set.vbr_constraint, bool ? 1 : 0);
  }
  set application(arg) {
    this.ctl(ctl.set.application, ctl.application[arg]);
  }
  set force_channels(arg) {
    this.ctl(ctl.set.force_channels, convert.fc[arg]);
  }
  set packet_loss(int) {
    this.ctl(ctl.set.packet_loss_perc, clamp(0, int, 100));
  }
  set prediction_disabled(bool) {
    this.ctl(ctl.set.prediction_disabled, bool ? 1 : 0);
  }
  set expert_frame_duration(arg) {
    this.ctl(ctl.set.expert_frame_duration, ctl.framesize[arg]);
  }
  set max_bandwidth(arg) {
    this.ctl(ctl.set.max_bandwidth, ctl.bandwidth[arg === "auto" ? "fullband" : arg]);
  }
  set bitrate(arg) {
    this.ctl(ctl.set.bitrate, arg === "max" ? ctl.bitrate_max : arg === "auto" ? ctl.auto : clamp(500, arg | 0, 512e3));
  }
}