rx-player
Version:
Canal+ HTML5 Video Player
77 lines (76 loc) • 3 kB
JavaScript
;
/**
* Copyright 2015 CANAL+ Group
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.default = clearTimelineFromPosition;
/**
* Remove segments which starts before the given `firstAvailablePosition` from
* the timeline. `firstAvailablePosition` has to be time scaled.
* @param {Array.<Object>} timeline
* @param {number} firstAvailablePosition
* @returns {number} - Returns the number of removed segments. This includes
* potential implicit segment from decremented `repeatCount` attributes.
*/
function clearTimelineFromPosition(timeline, firstAvailablePosition) {
var nbEltsRemoved = 0;
while (timeline.length > 0) {
var firstElt = timeline[0];
if (firstElt.start >= firstAvailablePosition) {
return nbEltsRemoved; // all clear
}
if (firstElt.repeatCount === -1) {
return nbEltsRemoved;
}
else if (firstElt.repeatCount === 0) {
timeline.shift();
nbEltsRemoved += 1;
}
else {
// we have a segment repetition
var nextElt = timeline[1];
if (nextElt !== undefined && nextElt.start <= firstAvailablePosition) {
timeline.shift();
nbEltsRemoved += 1;
}
else {
// no next segment or next segment is available
if (firstElt.duration <= 0) {
return nbEltsRemoved;
}
var nextStart = firstElt.start + firstElt.duration;
var nextRepeat = 1;
while (nextStart < firstAvailablePosition && nextRepeat <= firstElt.repeatCount) {
nextStart += firstElt.duration;
nextRepeat++;
}
if (nextRepeat > firstElt.repeatCount) {
// every start is before
timeline.shift();
nbEltsRemoved = firstElt.repeatCount + 1;
}
else {
// some repetitions start after and some before
var newRepeat = firstElt.repeatCount - nextRepeat;
firstElt.start = nextStart;
firstElt.repeatCount = newRepeat;
nbEltsRemoved += nextRepeat;
return nbEltsRemoved;
}
}
}
}
return nbEltsRemoved;
}