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parent
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commit
602ca1128e
3123 changed files with 521005 additions and 521005 deletions
214
node_modules/mux.js/cjs/mp4/track-decode-info.js
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vendored
214
node_modules/mux.js/cjs/mp4/track-decode-info.js
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@ -1,108 +1,108 @@
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"use strict";
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/**
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* mux.js
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*
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* Copyright (c) Brightcove
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* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
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*/
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var ONE_SECOND_IN_TS = require('../utils/clock').ONE_SECOND_IN_TS;
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/**
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* Store information about the start and end of the track and the
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* duration for each frame/sample we process in order to calculate
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* the baseMediaDecodeTime
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*/
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var collectDtsInfo = function collectDtsInfo(track, data) {
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if (typeof data.pts === 'number') {
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if (track.timelineStartInfo.pts === undefined) {
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track.timelineStartInfo.pts = data.pts;
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}
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if (track.minSegmentPts === undefined) {
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track.minSegmentPts = data.pts;
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} else {
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track.minSegmentPts = Math.min(track.minSegmentPts, data.pts);
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}
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if (track.maxSegmentPts === undefined) {
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track.maxSegmentPts = data.pts;
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} else {
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track.maxSegmentPts = Math.max(track.maxSegmentPts, data.pts);
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}
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}
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if (typeof data.dts === 'number') {
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if (track.timelineStartInfo.dts === undefined) {
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track.timelineStartInfo.dts = data.dts;
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}
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if (track.minSegmentDts === undefined) {
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track.minSegmentDts = data.dts;
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} else {
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track.minSegmentDts = Math.min(track.minSegmentDts, data.dts);
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}
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if (track.maxSegmentDts === undefined) {
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track.maxSegmentDts = data.dts;
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} else {
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track.maxSegmentDts = Math.max(track.maxSegmentDts, data.dts);
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}
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}
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};
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/**
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* Clear values used to calculate the baseMediaDecodeTime between
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* tracks
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*/
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var clearDtsInfo = function clearDtsInfo(track) {
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delete track.minSegmentDts;
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delete track.maxSegmentDts;
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delete track.minSegmentPts;
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delete track.maxSegmentPts;
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};
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/**
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* Calculate the track's baseMediaDecodeTime based on the earliest
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* DTS the transmuxer has ever seen and the minimum DTS for the
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* current track
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* @param track {object} track metadata configuration
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* @param keepOriginalTimestamps {boolean} If true, keep the timestamps
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* in the source; false to adjust the first segment to start at 0.
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*/
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var calculateTrackBaseMediaDecodeTime = function calculateTrackBaseMediaDecodeTime(track, keepOriginalTimestamps) {
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var baseMediaDecodeTime,
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scale,
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minSegmentDts = track.minSegmentDts; // Optionally adjust the time so the first segment starts at zero.
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if (!keepOriginalTimestamps) {
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minSegmentDts -= track.timelineStartInfo.dts;
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} // track.timelineStartInfo.baseMediaDecodeTime is the location, in time, where
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// we want the start of the first segment to be placed
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baseMediaDecodeTime = track.timelineStartInfo.baseMediaDecodeTime; // Add to that the distance this segment is from the very first
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baseMediaDecodeTime += minSegmentDts; // baseMediaDecodeTime must not become negative
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baseMediaDecodeTime = Math.max(0, baseMediaDecodeTime);
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if (track.type === 'audio') {
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// Audio has a different clock equal to the sampling_rate so we need to
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// scale the PTS values into the clock rate of the track
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scale = track.samplerate / ONE_SECOND_IN_TS;
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baseMediaDecodeTime *= scale;
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baseMediaDecodeTime = Math.floor(baseMediaDecodeTime);
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}
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return baseMediaDecodeTime;
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};
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module.exports = {
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clearDtsInfo: clearDtsInfo,
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calculateTrackBaseMediaDecodeTime: calculateTrackBaseMediaDecodeTime,
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collectDtsInfo: collectDtsInfo
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"use strict";
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/**
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* mux.js
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*
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* Copyright (c) Brightcove
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* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
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*/
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var ONE_SECOND_IN_TS = require('../utils/clock').ONE_SECOND_IN_TS;
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/**
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* Store information about the start and end of the track and the
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* duration for each frame/sample we process in order to calculate
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* the baseMediaDecodeTime
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*/
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var collectDtsInfo = function collectDtsInfo(track, data) {
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if (typeof data.pts === 'number') {
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if (track.timelineStartInfo.pts === undefined) {
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track.timelineStartInfo.pts = data.pts;
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}
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if (track.minSegmentPts === undefined) {
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track.minSegmentPts = data.pts;
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} else {
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track.minSegmentPts = Math.min(track.minSegmentPts, data.pts);
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}
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if (track.maxSegmentPts === undefined) {
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track.maxSegmentPts = data.pts;
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} else {
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track.maxSegmentPts = Math.max(track.maxSegmentPts, data.pts);
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}
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}
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if (typeof data.dts === 'number') {
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if (track.timelineStartInfo.dts === undefined) {
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track.timelineStartInfo.dts = data.dts;
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}
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if (track.minSegmentDts === undefined) {
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track.minSegmentDts = data.dts;
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} else {
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track.minSegmentDts = Math.min(track.minSegmentDts, data.dts);
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}
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if (track.maxSegmentDts === undefined) {
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track.maxSegmentDts = data.dts;
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} else {
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track.maxSegmentDts = Math.max(track.maxSegmentDts, data.dts);
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}
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}
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};
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/**
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* Clear values used to calculate the baseMediaDecodeTime between
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* tracks
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*/
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var clearDtsInfo = function clearDtsInfo(track) {
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delete track.minSegmentDts;
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delete track.maxSegmentDts;
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delete track.minSegmentPts;
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delete track.maxSegmentPts;
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};
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/**
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* Calculate the track's baseMediaDecodeTime based on the earliest
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* DTS the transmuxer has ever seen and the minimum DTS for the
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* current track
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* @param track {object} track metadata configuration
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* @param keepOriginalTimestamps {boolean} If true, keep the timestamps
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* in the source; false to adjust the first segment to start at 0.
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*/
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var calculateTrackBaseMediaDecodeTime = function calculateTrackBaseMediaDecodeTime(track, keepOriginalTimestamps) {
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var baseMediaDecodeTime,
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scale,
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minSegmentDts = track.minSegmentDts; // Optionally adjust the time so the first segment starts at zero.
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if (!keepOriginalTimestamps) {
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minSegmentDts -= track.timelineStartInfo.dts;
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} // track.timelineStartInfo.baseMediaDecodeTime is the location, in time, where
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// we want the start of the first segment to be placed
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baseMediaDecodeTime = track.timelineStartInfo.baseMediaDecodeTime; // Add to that the distance this segment is from the very first
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baseMediaDecodeTime += minSegmentDts; // baseMediaDecodeTime must not become negative
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baseMediaDecodeTime = Math.max(0, baseMediaDecodeTime);
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if (track.type === 'audio') {
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// Audio has a different clock equal to the sampling_rate so we need to
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// scale the PTS values into the clock rate of the track
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scale = track.samplerate / ONE_SECOND_IN_TS;
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baseMediaDecodeTime *= scale;
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baseMediaDecodeTime = Math.floor(baseMediaDecodeTime);
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}
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return baseMediaDecodeTime;
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};
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module.exports = {
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clearDtsInfo: clearDtsInfo,
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calculateTrackBaseMediaDecodeTime: calculateTrackBaseMediaDecodeTime,
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collectDtsInfo: collectDtsInfo
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};
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2208
node_modules/mux.js/cjs/mp4/transmuxer.js
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2208
node_modules/mux.js/cjs/mp4/transmuxer.js
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File diff suppressed because it is too large
Load diff
280
node_modules/mux.js/cjs/partial/audio-segment-stream.js
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280
node_modules/mux.js/cjs/partial/audio-segment-stream.js
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@ -1,141 +1,141 @@
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'use strict';
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var Stream = require('../utils/stream.js');
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var mp4 = require('../mp4/mp4-generator.js');
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var audioFrameUtils = require('../mp4/audio-frame-utils');
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var trackInfo = require('../mp4/track-decode-info.js');
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var ONE_SECOND_IN_TS = require('../utils/clock').ONE_SECOND_IN_TS;
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var AUDIO_PROPERTIES = require('../constants/audio-properties.js');
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/**
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* Constructs a single-track, ISO BMFF media segment from AAC data
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* events. The output of this stream can be fed to a SourceBuffer
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* configured with a suitable initialization segment.
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*/
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var AudioSegmentStream = function AudioSegmentStream(track, options) {
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var adtsFrames = [],
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sequenceNumber = 0,
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earliestAllowedDts = 0,
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audioAppendStartTs = 0,
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videoBaseMediaDecodeTime = Infinity,
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segmentStartPts = null,
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segmentEndPts = null;
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options = options || {};
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AudioSegmentStream.prototype.init.call(this);
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this.push = function (data) {
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trackInfo.collectDtsInfo(track, data);
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if (track) {
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AUDIO_PROPERTIES.forEach(function (prop) {
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track[prop] = data[prop];
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});
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} // buffer audio data until end() is called
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adtsFrames.push(data);
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};
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this.setEarliestDts = function (earliestDts) {
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earliestAllowedDts = earliestDts;
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};
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this.setVideoBaseMediaDecodeTime = function (baseMediaDecodeTime) {
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videoBaseMediaDecodeTime = baseMediaDecodeTime;
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};
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this.setAudioAppendStart = function (timestamp) {
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audioAppendStartTs = timestamp;
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};
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this.processFrames_ = function () {
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var frames, moof, mdat, boxes, timingInfo; // return early if no audio data has been observed
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if (adtsFrames.length === 0) {
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return;
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}
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frames = audioFrameUtils.trimAdtsFramesByEarliestDts(adtsFrames, track, earliestAllowedDts);
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if (frames.length === 0) {
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// return early if the frames are all after the earliest allowed DTS
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// TODO should we clear the adtsFrames?
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return;
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}
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track.baseMediaDecodeTime = trackInfo.calculateTrackBaseMediaDecodeTime(track, options.keepOriginalTimestamps);
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audioFrameUtils.prefixWithSilence(track, frames, audioAppendStartTs, videoBaseMediaDecodeTime); // we have to build the index from byte locations to
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// samples (that is, adts frames) in the audio data
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track.samples = audioFrameUtils.generateSampleTable(frames); // concatenate the audio data to constuct the mdat
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mdat = mp4.mdat(audioFrameUtils.concatenateFrameData(frames));
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adtsFrames = [];
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moof = mp4.moof(sequenceNumber, [track]); // bump the sequence number for next time
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sequenceNumber++;
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track.initSegment = mp4.initSegment([track]); // it would be great to allocate this array up front instead of
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// throwing away hundreds of media segment fragments
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boxes = new Uint8Array(moof.byteLength + mdat.byteLength);
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boxes.set(moof);
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boxes.set(mdat, moof.byteLength);
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trackInfo.clearDtsInfo(track);
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if (segmentStartPts === null) {
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segmentEndPts = segmentStartPts = frames[0].pts;
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}
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segmentEndPts += frames.length * (ONE_SECOND_IN_TS * 1024 / track.samplerate);
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timingInfo = {
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start: segmentStartPts
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};
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this.trigger('timingInfo', timingInfo);
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this.trigger('data', {
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track: track,
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boxes: boxes
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});
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};
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this.flush = function () {
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this.processFrames_(); // trigger final timing info
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this.trigger('timingInfo', {
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start: segmentStartPts,
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end: segmentEndPts
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});
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this.resetTiming_();
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this.trigger('done', 'AudioSegmentStream');
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};
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this.partialFlush = function () {
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this.processFrames_();
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this.trigger('partialdone', 'AudioSegmentStream');
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};
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this.endTimeline = function () {
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this.flush();
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this.trigger('endedtimeline', 'AudioSegmentStream');
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};
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this.resetTiming_ = function () {
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trackInfo.clearDtsInfo(track);
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segmentStartPts = null;
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segmentEndPts = null;
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};
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this.reset = function () {
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this.resetTiming_();
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adtsFrames = [];
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this.trigger('reset');
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};
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};
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AudioSegmentStream.prototype = new Stream();
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'use strict';
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var Stream = require('../utils/stream.js');
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var mp4 = require('../mp4/mp4-generator.js');
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var audioFrameUtils = require('../mp4/audio-frame-utils');
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var trackInfo = require('../mp4/track-decode-info.js');
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var ONE_SECOND_IN_TS = require('../utils/clock').ONE_SECOND_IN_TS;
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var AUDIO_PROPERTIES = require('../constants/audio-properties.js');
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/**
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* Constructs a single-track, ISO BMFF media segment from AAC data
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* events. The output of this stream can be fed to a SourceBuffer
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* configured with a suitable initialization segment.
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*/
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var AudioSegmentStream = function AudioSegmentStream(track, options) {
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var adtsFrames = [],
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sequenceNumber = 0,
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earliestAllowedDts = 0,
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audioAppendStartTs = 0,
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videoBaseMediaDecodeTime = Infinity,
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segmentStartPts = null,
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segmentEndPts = null;
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options = options || {};
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AudioSegmentStream.prototype.init.call(this);
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this.push = function (data) {
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trackInfo.collectDtsInfo(track, data);
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if (track) {
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AUDIO_PROPERTIES.forEach(function (prop) {
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track[prop] = data[prop];
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});
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} // buffer audio data until end() is called
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adtsFrames.push(data);
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};
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this.setEarliestDts = function (earliestDts) {
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earliestAllowedDts = earliestDts;
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};
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this.setVideoBaseMediaDecodeTime = function (baseMediaDecodeTime) {
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videoBaseMediaDecodeTime = baseMediaDecodeTime;
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};
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this.setAudioAppendStart = function (timestamp) {
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audioAppendStartTs = timestamp;
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};
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this.processFrames_ = function () {
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var frames, moof, mdat, boxes, timingInfo; // return early if no audio data has been observed
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if (adtsFrames.length === 0) {
|
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return;
|
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}
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frames = audioFrameUtils.trimAdtsFramesByEarliestDts(adtsFrames, track, earliestAllowedDts);
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if (frames.length === 0) {
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// return early if the frames are all after the earliest allowed DTS
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// TODO should we clear the adtsFrames?
|
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return;
|
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}
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|
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track.baseMediaDecodeTime = trackInfo.calculateTrackBaseMediaDecodeTime(track, options.keepOriginalTimestamps);
|
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audioFrameUtils.prefixWithSilence(track, frames, audioAppendStartTs, videoBaseMediaDecodeTime); // we have to build the index from byte locations to
|
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// samples (that is, adts frames) in the audio data
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||||
|
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track.samples = audioFrameUtils.generateSampleTable(frames); // concatenate the audio data to constuct the mdat
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|
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mdat = mp4.mdat(audioFrameUtils.concatenateFrameData(frames));
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adtsFrames = [];
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moof = mp4.moof(sequenceNumber, [track]); // bump the sequence number for next time
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sequenceNumber++;
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track.initSegment = mp4.initSegment([track]); // it would be great to allocate this array up front instead of
|
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// throwing away hundreds of media segment fragments
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boxes = new Uint8Array(moof.byteLength + mdat.byteLength);
|
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boxes.set(moof);
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boxes.set(mdat, moof.byteLength);
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trackInfo.clearDtsInfo(track);
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if (segmentStartPts === null) {
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segmentEndPts = segmentStartPts = frames[0].pts;
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}
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segmentEndPts += frames.length * (ONE_SECOND_IN_TS * 1024 / track.samplerate);
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timingInfo = {
|
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start: segmentStartPts
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};
|
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this.trigger('timingInfo', timingInfo);
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this.trigger('data', {
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track: track,
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boxes: boxes
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});
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};
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this.flush = function () {
|
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this.processFrames_(); // trigger final timing info
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this.trigger('timingInfo', {
|
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start: segmentStartPts,
|
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end: segmentEndPts
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});
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this.resetTiming_();
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this.trigger('done', 'AudioSegmentStream');
|
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};
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||||
this.partialFlush = function () {
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this.processFrames_();
|
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this.trigger('partialdone', 'AudioSegmentStream');
|
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};
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||||
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this.endTimeline = function () {
|
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this.flush();
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this.trigger('endedtimeline', 'AudioSegmentStream');
|
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};
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this.resetTiming_ = function () {
|
||||
trackInfo.clearDtsInfo(track);
|
||||
segmentStartPts = null;
|
||||
segmentEndPts = null;
|
||||
};
|
||||
|
||||
this.reset = function () {
|
||||
this.resetTiming_();
|
||||
adtsFrames = [];
|
||||
this.trigger('reset');
|
||||
};
|
||||
};
|
||||
|
||||
AudioSegmentStream.prototype = new Stream();
|
||||
module.exports = AudioSegmentStream;
|
||||
Loading…
Add table
Add a link
Reference in a new issue