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import { writable, type Writable } from 'svelte/store';
export enum MediaStreamStatus {
INIT = "init",
CONNECTED = "connected",
DISCONNECTED = "disconnected",
}
export const onFrameChangeStore: Writable<{ now: Number, metadata: VideoFrameCallbackMetadata, blob: Blob }> = writable();
export const isMediaStreaming = writable(MediaStreamStatus.INIT);
interface mediaStream {
mediaStream: MediaStream | null;
status: MediaStreamStatus
devices: MediaDeviceInfo[];
}
const initialState: mediaStream = {
mediaStream: null,
status: MediaStreamStatus.INIT,
devices: [],
};
export const mediaStreamState = writable(initialState);
export const mediaStreamActions = {
async enumerateDevices() {
console.log("Enumerating devices");
await navigator.mediaDevices.enumerateDevices()
.then(devices => {
const cameras = devices.filter(device => device.kind === 'videoinput');
console.log("Cameras: ", cameras);
mediaStreamState.update((state) => ({
...state,
devices: cameras,
}));
})
.catch(err => {
console.error(err);
});
},
async start(mediaDevicedID?: string) {
const constraints = {
audio: false,
video: {
width: 1024, height: 1024, deviceId: mediaDevicedID
}
};
await navigator.mediaDevices
.getUserMedia(constraints)
.then((mediaStream) => {
mediaStreamState.update((state) => ({
...state,
mediaStream: mediaStream,
status: MediaStreamStatus.CONNECTED,
}));
isMediaStreaming.set(MediaStreamStatus.CONNECTED);
})
.catch((err) => {
console.error(`${err.name}: ${err.message}`);
isMediaStreaming.set(MediaStreamStatus.DISCONNECTED);
});
},
async switchCamera(mediaDevicedID: string) {
const constraints = {
audio: false,
video: { width: 1024, height: 1024, deviceId: mediaDevicedID }
};
await navigator.mediaDevices
.getUserMedia(constraints)
.then((mediaStream) => {
mediaStreamState.update((state) => ({
...state,
mediaStream: mediaStream,
status: MediaStreamStatus.CONNECTED,
}));
})
.catch((err) => {
console.error(`${err.name}: ${err.message}`);
});
},
async stop() {
navigator.mediaDevices.getUserMedia({ video: true }).then((mediaStream) => {
mediaStream.getTracks().forEach((track) => track.stop());
});
mediaStreamState.update((state) => ({
...state,
mediaStream: null,
status: MediaStreamStatus.DISCONNECTED,
}));
isMediaStreaming.set(MediaStreamStatus.DISCONNECTED);
},
}; |