jiti-meet/react/features/base/media/reducer.js

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import { combineReducers } from 'redux';
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import { CONFERENCE_FAILED, CONFERENCE_LEFT } from '../conference/actionTypes';
import { ReducerRegistry } from '../redux';
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import { TRACK_REMOVED } from '../tracks/actionTypes';
import {
SET_AUDIO_AVAILABLE,
SET_AUDIO_MUTED,
SET_AUDIO_UNMUTE_PERMISSIONS,
SET_CAMERA_FACING_MODE,
SET_VIDEO_AVAILABLE,
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SET_VIDEO_MUTED,
SET_VIDEO_UNMUTE_PERMISSIONS,
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STORE_VIDEO_TRANSFORM,
TOGGLE_CAMERA_FACING_MODE
} from './actionTypes';
import { CAMERA_FACING_MODE } from './constants';
/**
* Media state object for local audio.
*
* @typedef {Object} AudioMediaState
* @property {boolean} muted=false - Audio muted state.
*/
// FIXME Technically, _AUDIO_INITIAL_MEDIA_STATE is a constant internal to the
// feature base/media and used in multiple files so it should be in
// constants.js. Practically though, AudioMediaState would then be used in
// multiple files as well so I don't know where and how to move it.
/**
* Initial state for local audio.
*
* @type {AudioMediaState}
*/
export const _AUDIO_INITIAL_MEDIA_STATE = {
available: true,
unmuteBlocked: false,
muted: false
};
/**
* Reducer for audio media state.
*
* @param {AudioMediaState} state - Media state of local audio.
* @param {Object} action - Action object.
* @param {string} action.type - Type of action.
* @private
* @returns {AudioMediaState}
*/
function _audio(state = _AUDIO_INITIAL_MEDIA_STATE, action) {
switch (action.type) {
case SET_AUDIO_AVAILABLE:
return {
...state,
available: action.available
};
case SET_AUDIO_MUTED:
return {
...state,
muted: action.muted
};
case SET_AUDIO_UNMUTE_PERMISSIONS:
return {
...state,
unmuteBlocked: action.blocked
};
default:
return state;
}
}
/**
* Media state object for local video.
*
* @typedef {Object} VideoMediaState
* @property {CAMERA_FACING_MODE} facingMode='user' - Camera facing mode.
* @property {boolean} muted=false - Video muted state.
*/
// FIXME Technically, _VIDEO_INITIAL_MEDIA_STATE is a constant internal to the
// feature base/media and used in multiple files so it should be in
// constants.js. Practically though, VideoMediaState would then be used in
// multiple files as well so I don't know where and how to move it.
/**
* Initial state for video.
*
* @type {VideoMediaState}
*/
export const _VIDEO_INITIAL_MEDIA_STATE = {
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available: true,
unmuteBlocked: false,
facingMode: CAMERA_FACING_MODE.USER,
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muted: 0,
/**
* The video {@link Transform}s applied to {@code MediaStream}s by
* {@code id} i.e. "pinch to zoom".
*/
transforms: {}
};
/**
* Reducer for camera media state.
*
* @param {VideoMediaState} state - Media state of local video.
* @param {Object} action - Action object.
* @param {string} action.type - Type of action.
* @private
* @returns {VideoMediaState}
*/
function _video(state = _VIDEO_INITIAL_MEDIA_STATE, action) {
switch (action.type) {
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case CONFERENCE_FAILED:
case CONFERENCE_LEFT:
return _clearAllVideoTransforms(state);
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case SET_CAMERA_FACING_MODE:
return {
...state,
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facingMode: action.cameraFacingMode
};
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case SET_VIDEO_AVAILABLE:
return {
...state,
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available: action.available
};
case SET_VIDEO_MUTED:
return {
...state,
muted: action.muted
};
case SET_VIDEO_UNMUTE_PERMISSIONS:
return {
...state,
unmuteBlocked: action.blocked
};
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case STORE_VIDEO_TRANSFORM:
return _storeVideoTransform(state, action);
case TOGGLE_CAMERA_FACING_MODE: {
let cameraFacingMode = state.facingMode;
cameraFacingMode
= cameraFacingMode === CAMERA_FACING_MODE.USER
? CAMERA_FACING_MODE.ENVIRONMENT
: CAMERA_FACING_MODE.USER;
return {
...state,
facingMode: cameraFacingMode
};
}
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case TRACK_REMOVED:
return _trackRemoved(state, action);
default:
return state;
}
}
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/**
* Listen for various actions related to media devices.
*
* @param {Object} state - State of media devices.
* @param {Object} action - Action object.
* @param {string} action.type - Type of action.
* @param {Object} action.media - Information about media devices to be
* modified.
* @returns {Object}
*/
ReducerRegistry.register('features/base/media', combineReducers({
audio: _audio,
video: _video
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}));
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/**
* Removes all stored video {@link Transform}s.
*
* @param {Object} state - The {@code video} state of the feature base/media.
* @private
* @returns {Object}
*/
function _clearAllVideoTransforms(state) {
return {
...state,
transforms: _VIDEO_INITIAL_MEDIA_STATE.transforms
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};
}
/**
* Stores the last applied transform to a stream.
*
* @param {Object} state - The {@code video} state of the feature base/media.
* @param {Object} action - The redux action {@link STORE_VIDEO_TRANSFORM}.
* @private
* @returns {Object}
*/
function _storeVideoTransform(state, { streamId, transform }) {
return {
...state,
transforms: {
...state.transforms,
[streamId]: transform
}
};
}
/**
* Removes the stored video {@link Transform} associated with a
* {@code MediaStream} when its respective track is removed.
*
* @param {Object} state - The {@code video} state of the feature base/media.
* @param {Object} action - The redux action {@link TRACK_REMOVED}.
* @private
* @returns {Object}
*/
function _trackRemoved(state, { track: { jitsiTrack } }) {
if (jitsiTrack) {
const streamId = jitsiTrack.getStreamId();
if (streamId && streamId in state.transforms) {
const nextTransforms = {
...state.transforms
};
delete nextTransforms[streamId];
return {
...state,
transforms: nextTransforms
};
}
}
return state;
}