xref: /expo/packages/expo-camera/build/WebUserMediaManager.js.map (revision 8a78d98e)

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eslint-env browser */\n/**\n * A web-only module for ponyfilling the UserMedia API.\n */\nimport { Platform } from 'expo-modules-core';\n\nexport const userMediaRequested: boolean = false;\n\nexport const mountedInstances: any[] = [];\n\nasync function requestLegacyUserMediaAsync(props): Promise<any[]> {\n  const optionalSource = (id) => ({ optional: [{ sourceId: id }] });\n\n  const constraintToSourceId = (constraint) => {\n    const { deviceId } = constraint;\n\n    if (typeof deviceId === 'string') {\n      return deviceId;\n    }\n\n    if (Array.isArray(deviceId) && deviceId.length > 0) {\n      return deviceId[0];\n    }\n\n    if (typeof deviceId === 'object' && deviceId.ideal) {\n      return deviceId.ideal;\n    }\n\n    return null;\n  };\n\n  const sources: any[] = await new Promise((resolve) =>\n    // @ts-ignore: https://caniuse.com/#search=getSources Chrome for Android (78) & Samsung Internet (10.1) use this\n    MediaStreamTrack.getSources((sources) => resolve(sources))\n  );\n\n  let audioSource = null;\n  let videoSource = null;\n\n  sources.forEach((source) => {\n    if (source.kind === 'audio') {\n      audioSource = source.id;\n    } else if (source.kind === 'video') {\n      videoSource = source.id;\n    }\n  });\n\n  const audioSourceId = constraintToSourceId(props.audioConstraints);\n  if (audioSourceId) {\n    audioSource = audioSourceId;\n  }\n\n  const videoSourceId = constraintToSourceId(props.videoConstraints);\n  if (videoSourceId) {\n    videoSource = videoSourceId;\n  }\n\n  return [optionalSource(audioSource), optionalSource(videoSource)];\n}\n\nasync function sourceSelectedAsync(\n  isMuted: boolean,\n  audioConstraints?: MediaTrackConstraints | boolean,\n  videoConstraints?: MediaTrackConstraints | boolean\n): Promise<MediaStream> {\n  const constraints: MediaStreamConstraints = {\n    video: typeof videoConstraints !== 'undefined' ? videoConstraints : true,\n  };\n\n  if (!isMuted) {\n    constraints.audio = typeof audioConstraints !== 'undefined' ? audioConstraints : true;\n  }\n\n  return await getAnyUserMediaAsync(constraints);\n}\n\nexport async function requestUserMediaAsync(\n  props: { audio?: any; video?: any },\n  isMuted: boolean = true\n): Promise<MediaStream> {\n  if (canGetUserMedia()) {\n    return await sourceSelectedAsync(isMuted, props.audio, props.video);\n  }\n  const [audio, video] = await requestLegacyUserMediaAsync(props);\n  return await sourceSelectedAsync(isMuted, audio, video);\n}\n\nexport async function getAnyUserMediaAsync(\n  constraints: MediaStreamConstraints,\n  ignoreConstraints: boolean = false\n): Promise<MediaStream> {\n  try {\n    return await getUserMediaAsync({\n      ...constraints,\n      video: ignoreConstraints || constraints.video,\n    });\n  } catch (error) {\n    if (!ignoreConstraints && error.name === 'ConstraintNotSatisfiedError') {\n      return await getAnyUserMediaAsync(constraints, true);\n    }\n    throw error;\n  }\n}\n\nexport async function getUserMediaAsync(constraints: MediaStreamConstraints): Promise<MediaStream> {\n  if (navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {\n    return navigator.mediaDevices.getUserMedia(constraints);\n  }\n\n  const _getUserMedia =\n    navigator['mozGetUserMedia'] || navigator['webkitGetUserMedia'] || navigator['msGetUserMedia'];\n  return new Promise((resolve, reject) =>\n    _getUserMedia.call(navigator, constraints, resolve, reject)\n  );\n}\n\nexport function canGetUserMedia(): boolean {\n  return (\n    // SSR\n    Platform.isDOMAvailable &&\n    // Has any form of media API\n    !!(\n      (navigator.mediaDevices && navigator.mediaDevices.getUserMedia) ||\n      navigator['mozGetUserMedia'] ||\n      navigator['webkitGetUserMedia'] ||\n      navigator['msGetUserMedia']\n    )\n  );\n}\n\nexport async function isFrontCameraAvailableAsync(\n  devices?: MediaDeviceInfo[]\n): Promise<null | string> {\n  return await supportsCameraType(['front', 'user', 'facetime'], 'user', devices);\n}\n\nexport async function isBackCameraAvailableAsync(\n  devices?: MediaDeviceInfo[]\n): Promise<null | string> {\n  return await supportsCameraType(['back', 'rear'], 'environment', devices);\n}\n\nasync function supportsCameraType(\n  labels: string[],\n  type: string,\n  devices?: MediaDeviceInfo[]\n): Promise<null | string> {\n  if (!devices) {\n    if (!navigator.mediaDevices.enumerateDevices) {\n      return null;\n    }\n    devices = await navigator.mediaDevices.enumerateDevices();\n  }\n  const cameras = devices.filter((t) => t.kind === 'videoinput');\n  const [hasCamera] = cameras.filter((camera) =>\n    labels.some((label) => camera.label.toLowerCase().includes(label))\n  );\n  const [isCapable] = cameras.filter((camera) => {\n    if (!('getCapabilities' in camera)) {\n      return null;\n    }\n\n    const capabilities = (camera as any).getCapabilities();\n    if (!capabilities.facingMode) {\n      return null;\n    }\n\n    return capabilities.facingMode.find((_: string) => type);\n  });\n\n  return isCapable?.deviceId || hasCamera?.deviceId || null;\n}\n"]}