/
ExponentAV.web.ts
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/
ExponentAV.web.ts
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import { DeviceEventEmitter, PermissionResponse, PermissionStatus } from 'expo-modules-core';
import type { AVPlaybackNativeSource, AVPlaybackStatus, AVPlaybackStatusToSet } from './AV.types';
import type { RecordingStatus } from './Audio/Recording.types';
import { RecordingOptionsPresets } from './Audio/RecordingConstants';
async function getPermissionWithQueryAsync(
name: PermissionNameWithAdditionalValues
): Promise<PermissionStatus | null> {
if (!navigator || !navigator.permissions || !navigator.permissions.query) return null;
try {
const { state } = await navigator.permissions.query({ name });
switch (state) {
case 'granted':
return PermissionStatus.GRANTED;
case 'denied':
return PermissionStatus.DENIED;
default:
return PermissionStatus.UNDETERMINED;
}
} catch {
// Firefox - TypeError: 'microphone' (value of 'name' member of PermissionDescriptor) is not a valid value for enumeration PermissionName.
return PermissionStatus.UNDETERMINED;
}
}
function getUserMedia(constraints: MediaStreamConstraints): Promise<MediaStream> {
if (navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {
return navigator.mediaDevices.getUserMedia(constraints);
}
// Some browsers partially implement mediaDevices. We can't just assign an object
// with getUserMedia as it would overwrite existing properties.
// Here, we will just add the getUserMedia property if it's missing.
// First get ahold of the legacy getUserMedia, if present
const getUserMedia =
// TODO: this method is deprecated, migrate to https://developer.mozilla.org/en-US/docs/Web/API/MediaDevices/getUserMedia
navigator.getUserMedia ||
navigator.webkitGetUserMedia ||
navigator.mozGetUserMedia ||
function () {
const error: any = new Error('Permission unimplemented');
error.code = 0;
error.name = 'NotAllowedError';
throw error;
};
return new Promise((resolve, reject) => {
getUserMedia.call(navigator, constraints, resolve, reject);
});
}
function getStatusFromMedia(media?: HTMLMediaElement): AVPlaybackStatus {
if (!media) {
return {
isLoaded: false,
error: undefined,
};
}
const isPlaying = !!(
media.currentTime > 0 &&
!media.paused &&
!media.ended &&
media.readyState > 2
);
const status: AVPlaybackStatus = {
isLoaded: true,
uri: media.src,
progressUpdateIntervalMillis: 100, //TODO: Bacon: Add interval between calls
durationMillis: media.duration * 1000,
positionMillis: media.currentTime * 1000,
// playableDurationMillis: media.buffered * 1000,
// seekMillisToleranceBefore?: number
// seekMillisToleranceAfter?: number
shouldPlay: media.autoplay,
isPlaying,
isBuffering: false, //media.waiting,
rate: media.playbackRate,
// TODO: Bacon: This seems too complicated right now: https://webaudio.github.io/web-audio-api/#dom-biquadfilternode-frequency
shouldCorrectPitch: false,
volume: media.volume,
audioPan: 0,
isMuted: media.muted,
isLooping: media.loop,
didJustFinish: media.ended,
};
return status;
}
async function setStatusForMedia(
media: HTMLMediaElement,
status: AVPlaybackStatusToSet
): Promise<AVPlaybackStatus> {
if (status.positionMillis !== undefined) {
media.currentTime = status.positionMillis / 1000;
}
// if (status.progressUpdateIntervalMillis !== undefined) {
// media.progressUpdateIntervalMillis = status.progressUpdateIntervalMillis;
// }
// if (status.seekMillisToleranceBefore !== undefined) {
// media.seekMillisToleranceBefore = status.seekMillisToleranceBefore;
// }
// if (status.seekMillisToleranceAfter !== undefined) {
// media.seekMillisToleranceAfter = status.seekMillisToleranceAfter;
// }
// if (status.shouldCorrectPitch !== undefined) {
// media.shouldCorrectPitch = status.shouldCorrectPitch;
// }
if (status.shouldPlay !== undefined) {
if (status.shouldPlay) {
await media.play();
} else {
await media.pause();
}
}
if (status.rate !== undefined) {
media.playbackRate = status.rate;
}
if (status.volume !== undefined) {
media.volume = status.volume;
}
if (status.isMuted !== undefined) {
media.muted = status.isMuted;
}
if (status.isLooping !== undefined) {
media.loop = status.isLooping;
}
return getStatusFromMedia(media);
}
let mediaRecorder: null | any /*MediaRecorder*/ = null;
let mediaRecorderUptimeOfLastStartResume: number = 0;
let mediaRecorderDurationAlreadyRecorded: number = 0;
let mediaRecorderIsRecording: boolean = false;
function getAudioRecorderDurationMillis() {
let duration = mediaRecorderDurationAlreadyRecorded;
if (mediaRecorderIsRecording && mediaRecorderUptimeOfLastStartResume > 0) {
duration += Date.now() - mediaRecorderUptimeOfLastStartResume;
}
return duration;
}
export default {
async getStatusForVideo(element: HTMLMediaElement): Promise<AVPlaybackStatus> {
return getStatusFromMedia(element);
},
async loadForVideo(
element: HTMLMediaElement,
nativeSource: AVPlaybackNativeSource,
fullInitialStatus: AVPlaybackStatusToSet
): Promise<AVPlaybackStatus> {
return getStatusFromMedia(element);
},
async unloadForVideo(element: HTMLMediaElement): Promise<AVPlaybackStatus> {
return getStatusFromMedia(element);
},
async setStatusForVideo(
element: HTMLMediaElement,
status: AVPlaybackStatusToSet
): Promise<AVPlaybackStatus> {
return setStatusForMedia(element, status);
},
async replayVideo(
element: HTMLMediaElement,
status: AVPlaybackStatusToSet
): Promise<AVPlaybackStatus> {
return setStatusForMedia(element, status);
},
/* Audio */
async setAudioMode() {},
async setAudioIsEnabled() {},
async getStatusForSound(element: HTMLMediaElement) {
return getStatusFromMedia(element);
},
async loadForSound(
nativeSource: string | { uri: string; [key: string]: any },
fullInitialStatus: AVPlaybackStatusToSet
): Promise<[HTMLMediaElement, AVPlaybackStatus]> {
const source = typeof nativeSource === 'string' ? nativeSource : nativeSource.uri;
const media = new Audio(source);
media.ontimeupdate = () => {
DeviceEventEmitter.emit('didUpdatePlaybackStatus', {
key: media,
status: getStatusFromMedia(media),
});
};
media.onerror = () => {
DeviceEventEmitter.emit('ExponentAV.onError', {
key: media,
error: media.error!.message,
});
};
const status = await setStatusForMedia(media, fullInitialStatus);
return [media, status];
},
async unloadForSound(element: HTMLMediaElement) {
element.pause();
element.removeAttribute('src');
element.load();
return getStatusFromMedia(element);
},
async setStatusForSound(
element: HTMLMediaElement,
status: AVPlaybackStatusToSet
): Promise<AVPlaybackStatus> {
return setStatusForMedia(element, status);
},
async replaySound(
element: HTMLMediaElement,
status: AVPlaybackStatusToSet
): Promise<AVPlaybackStatus> {
return setStatusForMedia(element, status);
},
/* Recording */
// async setUnloadedCallbackForAndroidRecording() {},
async getAudioRecordingStatus(): Promise<RecordingStatus> {
return {
canRecord: mediaRecorder?.state === 'recording' || mediaRecorder?.state === 'inactive',
isRecording: mediaRecorder?.state === 'recording',
isDoneRecording: false,
durationMillis: getAudioRecorderDurationMillis(),
uri: null,
};
},
async prepareAudioRecorder(options): Promise<{
uri: string | null;
// status is of type RecordingStatus, but without the canRecord field populated
status: Pick<RecordingStatus, Exclude<keyof RecordingStatus, 'canRecord'>>;
}> {
if (typeof navigator !== 'undefined' && !navigator.mediaDevices) {
throw new Error('No media devices available');
}
mediaRecorderUptimeOfLastStartResume = 0;
mediaRecorderDurationAlreadyRecorded = 0;
const stream = await getUserMedia({ audio: true });
mediaRecorder = new (window as any).MediaRecorder(
stream,
options?.web || RecordingOptionsPresets.HIGH_QUALITY.web
);
mediaRecorder.addEventListener('pause', () => {
mediaRecorderDurationAlreadyRecorded = getAudioRecorderDurationMillis();
mediaRecorderIsRecording = false;
});
mediaRecorder.addEventListener('resume', () => {
mediaRecorderUptimeOfLastStartResume = Date.now();
mediaRecorderIsRecording = true;
});
mediaRecorder.addEventListener('start', () => {
mediaRecorderUptimeOfLastStartResume = Date.now();
mediaRecorderDurationAlreadyRecorded = 0;
mediaRecorderIsRecording = true;
});
mediaRecorder.addEventListener('stop', () => {
mediaRecorderDurationAlreadyRecorded = getAudioRecorderDurationMillis();
mediaRecorderIsRecording = false;
// Clears recording icon in Chrome tab
stream.getTracks().forEach((track) => track.stop());
});
const { uri, ...status } = await this.getAudioRecordingStatus();
return { uri: null, status };
},
async startAudioRecording(): Promise<RecordingStatus> {
if (mediaRecorder === null) {
throw new Error(
'Cannot start an audio recording without initializing a MediaRecorder. Run prepareToRecordAsync() before attempting to start an audio recording.'
);
}
if (mediaRecorder.state === 'paused') {
mediaRecorder.resume();
} else {
mediaRecorder.start();
}
return this.getAudioRecordingStatus();
},
async pauseAudioRecording(): Promise<RecordingStatus> {
if (mediaRecorder === null) {
throw new Error(
'Cannot start an audio recording without initializing a MediaRecorder. Run prepareToRecordAsync() before attempting to start an audio recording.'
);
}
// Set status to paused
mediaRecorder.pause();
return this.getAudioRecordingStatus();
},
async stopAudioRecording(): Promise<RecordingStatus> {
if (mediaRecorder === null) {
throw new Error(
'Cannot start an audio recording without initializing a MediaRecorder. Run prepareToRecordAsync() before attempting to start an audio recording.'
);
}
if (mediaRecorder.state === 'inactive') {
return this.getAudioRecordingStatus();
}
const dataPromise = new Promise<Blob>((resolve) =>
mediaRecorder.addEventListener('dataavailable', (e) => resolve(e.data))
);
mediaRecorder.stop();
const data = await dataPromise;
const url = URL.createObjectURL(data);
return {
...(await this.getAudioRecordingStatus()),
uri: url,
};
},
async unloadAudioRecorder(): Promise<void> {
mediaRecorder = null;
},
async getPermissionsAsync(): Promise<PermissionResponse> {
const maybeStatus = await getPermissionWithQueryAsync('microphone');
switch (maybeStatus) {
case PermissionStatus.GRANTED:
return {
status: PermissionStatus.GRANTED,
expires: 'never',
canAskAgain: true,
granted: true,
};
case PermissionStatus.DENIED:
return {
status: PermissionStatus.DENIED,
expires: 'never',
canAskAgain: true,
granted: false,
};
default:
return await this.requestPermissionsAsync();
}
},
async requestPermissionsAsync(): Promise<PermissionResponse> {
try {
const stream = await getUserMedia({ audio: true });
stream.getTracks().forEach((track) => track.stop());
return {
status: PermissionStatus.GRANTED,
expires: 'never',
canAskAgain: true,
granted: true,
};
} catch {
return {
status: PermissionStatus.DENIED,
expires: 'never',
canAskAgain: true,
granted: false,
};
}
},
};