webrtc-sandbox/camera-controls.html at master · sprangerik/webrtc-sandbox · GitHub

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<html>

<head>
  <title>WebRTC Playground</title>
  <style>
    body {
      font-family: monospace;
    }

    .encodingBox {
      display: inline-block;
      border: 1px solid black;
      margin: 5px 5px 5px 5px;
      padding: 5px 5px 5px 5px;
      max-width: 90%;
    }

    video {
      max-width: 600px;
    }
  </style>
</head>

<body>
  <table>
    <tr>
      <td>
        <video id="videoSource" autoplay muted></video>
      </td>
    </tr>
    <tr>
      <td>
        <span id="videoSourceSize">0x0</span>
        <span id="videoSourceFps">0</span>
        fps
      </td>
    </tr>
  </table>
  <button id="start">Start!</button>
  <button id="stop">Stop</button>
  <select id="resolution">
    <option value="QVGA">320x240 (QVGA)</option>
    <option value="VGA">640x480 (VGA)</option>
    <option value="HD">1280x720 (HD)</option>
    <option value="FullHD">1920x1080 (FullHD)</option>
    <option value="4K">4096x2160 (4K)</option>
    <option value="8K">7680x4320 (8K)</option>
    <option value="screen">Screen</option>
    <option value="screen-FullHD">Screen (FullHD)</option>
    <option value="screen-HD">Screen (HD)</option>
    <option value="screen-conference">Screen (conference)</option>
    <option value="screen-conference-FullHD">Screen (FullHD, conference)</option>
    <option value="screen-conference-HD">Screen (HD, conference)</option>
  </select>
  |
  <button id="enumerateDevices">Enumerate</button>
  <select id="devices">
  </select>
  <br>
  <br>
  <div>Camera controls |
    <button id="applyConstraints">Apply</button>
    <div id="cameraControls"></div>
  </div>
  <button id="clearlog">Clear log</button>
  <br>
  <div id="div"></div>

  <script>
    const constraints = {
      'QVGA': {
        video: {
          width: 320,
          height: 240,
        },
      },
      'VGA': {
        video: {
          width: 640,
          height: 480,
        },
      },
      'HD': {
        video: {
          width: 1280,
          height: 720,
        },
      },
      'FullHD': {
        video: {
          width: 1920,
          height: 1080,
        },
      },
      '4K': {
        video: {
          width: 4096,
          height: 2160,
        },
      },
      '8K': {
        video: {
          width: 7680,
          height: 4320,
        },
      },
    };

    /*
    const checkControls = (type) => {
      if (videoSource.srcObject !== null) {
        const capabilities = videoSource.srcObject.getVideoTracks()[0].getCapabilities();
        log('Event ' + type + ' has brightness: ' + (capabilities['brightness'] !== undefined ? 'YES' : 'NO'));
      }
    };

    videoSource.addEventListener('loadeddata', (e) => checkControls(e.type));
    videoSource.addEventListener('loadedmetadata', (e) => checkControls(e.type));
    videoSource.addEventListener('play', (e) => checkControls(e.type));
    videoSource.addEventListener('timeupdate', (e) => checkControls(e.type));
    */

    let stream;
    let streamResolution;
    const intervals = [];

    const closeStream = () => {
      for (const track of stream.getVideoTracks()) {
        track.stop();
      }
      stream = null;

      for (const interval of intervals) {
        window.clearInterval(interval);
      }
    };

    document.querySelector('#enumerateDevices').onclick = async () => {
      const currentDevices = await navigator.mediaDevices.enumerateDevices();
      devices.innerHTML = '';
      for (const device of currentDevices) {
        if (device.kind != 'videoinput') continue;

        const option = document.createElement('option');
        option.text = device.label;
        option.value = device.deviceId;
        devices.appendChild(option);
      }
    };

    document.querySelector('#start').onclick = async () => {
      try {
        resolutionName = resolution.value;
        if (stream && streamResolution && streamResolution !=
          resolutionName) {
          closeStream();
        }
        if (!stream) {
          const currentConstraints = constraints[resolutionName];
          if (devices.value !== '') {
            currentConstraints.video.deviceId = devices.value;
          }

          stream = await navigator.mediaDevices.getUserMedia(constraints[resolutionName]);
          streamResolution = resolutionName;

          await setStream(videoSource, videoSourceSize, videoSourceFps, stream);
          await populateCameraControls(stream.getVideoTracks()[0]);
        }
      } catch (e) {
        log(e);
      }
    };

    document.querySelector('#stop').onclick = () => {
      closeStream();
    };

    document.querySelector('#applyConstraints').onclick = async () => {
      const controls = document.querySelectorAll('#cameraControls input, #cameraControls select');
      const currentSettings = videoSource.srcObject.getVideoTracks()[0].getSettings();

      for (const control of controls) {
        if (currentSettings[control.id] == undefined || currentSettings[control.id] == control.value) {
          continue;
        }

        const newConstraints = {advanced: []};
        const value = {};
        value[control.id] = control.value;
        newConstraints.advanced.push(value);
        newConstraints[control.id] = control.value;
        await videoSource.srcObject.getVideoTracks()[0].applyConstraints(newConstraints);
      }
      /* log(JSON.stringify(newConstraints, 0, 2));
      await videoSource.srcObject.getVideoTracks()[0].applyConstraints(newConstraints);*/
      log(JSON.stringify(videoSource.srcObject.getVideoTracks()[0].getSettings(), 0, 2));
    };

    document.querySelector('#clearlog').onclick = () => {
      div.innerHTML = '';
    };

    const setStream = async (video, videoSize, videoFps, stream) => {
      video.srcObject = stream;
      video.onloadedmetadata = (e) => {
        videoSize.textContent = video.videoWidth + 'x' + video.videoHeight;
      };

      video.onresize = (e) => {
        videoSize.textContent = video.videoWidth + 'x' + video.videoHeight;
      };

      intervals.push(window.setInterval(((fpsBox, track) => {
        fpsBox.textContent = track.getSettings().frameRate.toFixed(
            1);
      }).bind(null, videoFps, stream.getTracks()[0]), 1000));
    };

    const populateCameraControls = async (track) => {
      await sleep(500);

      const capabilities = track.getCapabilities();
      const settings = track.getSettings();
      const blacklist = ['aspectRatio', 'deviceId', 'facingMode', 'frameRate', 'groupId', 'height', 'resizeMode', 'width'];

      for (const controlName in capabilities) {
        if (blacklist.includes(controlName)) continue;

        cameraControl = document.createElement('label');
        cameraControl.appendChild(document.createTextNode(controlName + ': '));

        const control = capabilities[controlName];
        let controlWidget = null;

        if (control instanceof Array) {
          controlWidget = document.createElement('select');
          for (const controlValue of control) {
            const option = document.createElement('option');
            option.value = controlValue;
            option.text = controlValue;
            controlWidget.appendChild(option);
          }
        } else {
          controlWidget = document.createElement('input');
          controlWidget.type = 'range';
          controlWidget.min = control.min;
          controlWidget.max = control.max;
          controlWidget.step = control.step;
        }
        controlWidget.id = controlName;
        controlWidget.value = settings[controlName];
        cameraControl.appendChild(controlWidget);
        cameraControls.appendChild(cameraControl);
        cameraControls.appendChild(document.createElement('br'));
      }
    };

    const log = (msg) => div.innerHTML += '<pre>' + msg + '</pre>';
    const sleep = (ms) => new Promise((resolve) => setTimeout(resolve, ms));
  </script>
</body>

</html>