@gpeng/macadam/test/test.js

Async node.js interface to Blackmagic Design capture and playback devices.

const macadam = require("../index.js");
//console.log(macadam);
//console.log(macadam.convertBGRAToYUV422);

// let deviceInfo = macadam.getDeviceInfo();
// let config = macadam.getDeviceConfig(0);
// let status = macadam.getDeviceStatus(0);
// console.log(status);
// for (let key in status) {
//   console.log(key, macadam.intToBMCode(status[key]));
// }

//console.log(config);
const width = 1920;
const height = 1080;
const pixel = Buffer.from([0, 0, 255, 255]); // B,G,R,A
const buffer = Buffer.allocUnsafe(width * height * 4);

for (let i = 0; i < buffer.length; i += 4) {
  pixel.copy(buffer, i);
}

async function play() {
  try {
    let playback = await macadam.playback({
      deviceIndex: 0, // Index relative to the 'macadam.getDeviceInfo()' array
      displayMode: macadam.bmdModeHD1080p50,
      pixelFormat: macadam.bmdFormat8BitYUV,
    });
    function timer(t) {
      return new Promise((f, r) => {
        setTimeout(f, t);
      });
    }
    for (let x = 0; x < 15; x++) {
      // Get hold of frame data as a Node.JS buffer
      console.log("Frame " + x);
      let yuvBuffer = await macadam.convertBGRAToYUV422_BT709(buffer);
      await playback.displayFrame(yuvBuffer);
      await timer(500); // Replace frame data around every half second
    }
    playback.stop();
    return;
  } catch (e) {
    console.log(JSON.stringify(e, null, 2));
  }
}
async function capture() {
  try {
    let capture = await macadam.capture({
      deviceIndex: 0, // Index relative to the 'macadam.getDeviceInfo()' array
      displayMode: macadam.bmdModeHD1080p30,
      pixelFormat: macadam.bmdFormat8BitARGB,
      // channels: 2,
      // sampleRate: macadam.bmdAudioSampleRate48kHz,
      // sampleType: macadam.bmdAudioSampleType16bitInteger,
    });
    // for (let x = 0; x < 1000; x++) {
    //   let frame = await capture.frame();
    //   console.log(frame);
    // }
    let frame = await capture.frame();

    capture.stop();
  } catch (e) {
    console.log(JSON.stringify(e, null, 2));
  }
}
async function CaptureAndPlayback() {
  let status = macadam.getDeviceStatus(0);
  console.log(status);
  console.log(macadam.bmdModeHD1080p50);
  console.log(macadam.bmdFormat8BitYUV);
  let capture = await macadam.capture({
    deviceIndex: 0, // Index relative to the 'macadam.getDeviceInfo()' array
    displayMode: status.currentVideoInputMode,
    pixelFormat: status.currentVideoInputPixelFormat,
    // channels: 2,
    // sampleRate: macadam.bmdAudioSampleRate48kHz,
    // sampleType: macadam.bmdAudioSampleType16bitInteger,
  });
  let playback = await macadam.playback({
    deviceIndex: 0, // Index relative to the 'macadam.getDeviceInfo()' array
    displayMode: status.currentVideoInputMode,
    pixelFormat: status.currentVideoInputPixelFormat,
  });
  for (let x = 0; x < 1500; x++) {
    // Get hold of frame data as a Node.JS buffer
    //console.log("Frame " + x);
    const buffer = await capture.frame();
    //console.log(buffer);
    await playback.displayFrame(buffer.video.data);
  }
}
CaptureAndPlayback();
//play().then(play);