1 |
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2 |
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3 |
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4 | import window from 'global/window';
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5 |
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6 |
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7 |
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8 |
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9 | const findAdCue = function(track, mediaTime) {
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10 | let cues = track.cues;
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11 |
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12 | for (let i = 0; i < cues.length; i++) {
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13 | let cue = cues[i];
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14 |
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15 | if (mediaTime >= cue.adStartTime && mediaTime <= cue.adEndTime) {
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16 | return cue;
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17 | }
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18 | }
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19 | return null;
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20 | };
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21 |
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22 | const updateAdCues = function(media, track, offset = 0) {
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23 | if (!media.segments) {
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24 | return;
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25 | }
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26 |
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27 | let mediaTime = offset;
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28 | let cue;
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29 |
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30 | for (let i = 0; i < media.segments.length; i++) {
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31 | let segment = media.segments[i];
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32 |
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33 | if (!cue) {
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34 |
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35 |
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36 |
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37 |
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38 | cue = findAdCue(track, mediaTime + (segment.duration / 2));
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39 | }
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40 |
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41 | if (cue) {
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42 | if ('cueIn' in segment) {
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43 |
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44 | cue.endTime = mediaTime;
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45 | cue.adEndTime = mediaTime;
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46 | mediaTime += segment.duration;
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47 | cue = null;
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48 | continue;
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49 | }
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50 |
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51 | if (mediaTime < cue.endTime) {
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52 |
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53 | mediaTime += segment.duration;
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54 | continue;
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55 | }
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56 |
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57 |
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58 | cue.endTime += segment.duration;
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59 |
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60 | } else {
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61 | if ('cueOut' in segment) {
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62 | cue = new window.VTTCue(mediaTime,
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63 | mediaTime + segment.duration,
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64 | segment.cueOut);
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65 | cue.adStartTime = mediaTime;
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66 |
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67 |
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68 | cue.adEndTime = mediaTime + parseFloat(segment.cueOut);
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69 | track.addCue(cue);
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70 | }
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71 |
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72 | if ('cueOutCont' in segment) {
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73 |
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74 | let adOffset;
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75 | let adTotal;
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76 |
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77 |
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78 |
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79 | [adOffset, adTotal] = segment.cueOutCont.split('/').map(parseFloat);
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80 |
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81 | cue = new window.VTTCue(mediaTime,
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82 | mediaTime + segment.duration,
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83 | '');
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84 | cue.adStartTime = mediaTime - adOffset;
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85 | cue.adEndTime = cue.adStartTime + adTotal;
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86 | track.addCue(cue);
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87 | }
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88 | }
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89 | mediaTime += segment.duration;
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90 | }
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91 | };
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92 |
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93 | export default {
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94 | updateAdCues,
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95 | findAdCue
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96 | };
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97 |
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