1 | 'use strict';
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2 |
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3 | Object.defineProperty(exports, '__esModule', {
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4 | value: true
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5 | });
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6 |
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7 | function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }
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8 |
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9 | var _videoJs = require('video.js');
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10 |
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11 | var _videoJs2 = _interopRequireDefault(_videoJs);
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12 |
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13 | var _binUtils = require('./bin-utils');
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14 |
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15 | var REQUEST_ERRORS = {
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16 | FAILURE: 2,
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17 | TIMEOUT: -101,
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18 | ABORTED: -102
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19 | };
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20 |
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21 | exports.REQUEST_ERRORS = REQUEST_ERRORS;
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22 |
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23 |
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24 |
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25 |
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26 |
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27 |
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28 |
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29 | var byterangeStr = function byterangeStr(byterange) {
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30 | var byterangeStart = undefined;
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31 | var byterangeEnd = undefined;
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32 |
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33 |
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34 |
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35 | byterangeEnd = byterange.offset + byterange.length - 1;
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36 | byterangeStart = byterange.offset;
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37 | return 'bytes=' + byterangeStart + '-' + byterangeEnd;
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38 | };
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39 |
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40 |
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41 |
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42 |
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43 |
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44 |
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45 |
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46 | var segmentXhrHeaders = function segmentXhrHeaders(segment) {
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47 | var headers = {};
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48 |
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49 | if (segment.byterange) {
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50 | headers.Range = byterangeStr(segment.byterange);
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51 | }
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52 | return headers;
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53 | };
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54 |
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55 |
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56 |
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57 |
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58 |
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59 |
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60 | var abortAll = function abortAll(activeXhrs) {
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61 | activeXhrs.forEach(function (xhr) {
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62 | xhr.abort();
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63 | });
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64 | };
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65 |
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66 |
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67 |
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68 |
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69 |
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70 |
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71 | var getRequestStats = function getRequestStats(request) {
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72 | return {
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73 | bandwidth: request.bandwidth,
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74 | bytesReceived: request.bytesReceived || 0,
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75 | roundTripTime: request.roundTripTime || 0
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76 | };
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77 | };
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78 |
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79 |
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80 |
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81 |
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82 |
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83 |
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84 |
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85 | var getProgressStats = function getProgressStats(progressEvent) {
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86 | var request = progressEvent.target;
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87 | var roundTripTime = Date.now() - request.requestTime;
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88 | var stats = {
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89 | bandwidth: Infinity,
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90 | bytesReceived: 0,
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91 | roundTripTime: roundTripTime || 0
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92 | };
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93 |
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94 | stats.bytesReceived = progressEvent.loaded;
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95 |
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96 |
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97 |
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98 | stats.bandwidth = Math.floor(stats.bytesReceived / stats.roundTripTime * 8 * 1000);
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99 |
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100 | return stats;
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101 | };
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102 |
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103 |
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104 |
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105 |
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106 |
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107 |
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108 |
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109 |
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110 | var handleErrors = function handleErrors(error, request) {
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111 | if (request.timedout) {
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112 | return {
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113 | status: request.status,
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114 | message: 'HLS request timed-out at URL: ' + request.uri,
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115 | code: REQUEST_ERRORS.TIMEOUT,
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116 | xhr: request
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117 | };
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118 | }
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119 |
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120 | if (request.aborted) {
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121 | return {
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122 | status: request.status,
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123 | message: 'HLS request aborted at URL: ' + request.uri,
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124 | code: REQUEST_ERRORS.ABORTED,
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125 | xhr: request
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126 | };
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127 | }
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128 |
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129 | if (error) {
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130 | return {
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131 | status: request.status,
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132 | message: 'HLS request errored at URL: ' + request.uri,
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133 | code: REQUEST_ERRORS.FAILURE,
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134 | xhr: request
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135 | };
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136 | }
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137 |
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138 | return null;
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139 | };
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140 |
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141 |
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142 |
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143 |
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144 |
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145 |
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146 |
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147 |
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148 |
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149 |
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150 | var handleKeyResponse = function handleKeyResponse(segment, finishProcessingFn) {
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151 | return function (error, request) {
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152 | var response = request.response;
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153 | var errorObj = handleErrors(error, request);
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154 |
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155 | if (errorObj) {
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156 | return finishProcessingFn(errorObj, segment);
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157 | }
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158 |
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159 | if (response.byteLength !== 16) {
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160 | return finishProcessingFn({
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161 | status: request.status,
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162 | message: 'Invalid HLS key at URL: ' + request.uri,
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163 | code: REQUEST_ERRORS.FAILURE,
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164 | xhr: request
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165 | }, segment);
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166 | }
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167 |
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168 | var view = new DataView(response);
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169 |
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170 | segment.key.bytes = new Uint32Array([view.getUint32(0), view.getUint32(4), view.getUint32(8), view.getUint32(12)]);
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171 | return finishProcessingFn(null, segment);
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172 | };
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173 | };
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174 |
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175 |
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176 |
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177 |
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178 |
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179 |
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180 |
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181 |
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182 |
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183 | var handleInitSegmentResponse = function handleInitSegmentResponse(segment, finishProcessingFn) {
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184 | return function (error, request) {
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185 | var response = request.response;
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186 | var errorObj = handleErrors(error, request);
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187 |
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188 | if (errorObj) {
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189 | return finishProcessingFn(errorObj, segment);
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190 | }
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191 |
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192 |
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193 | if (response.byteLength === 0) {
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194 | return finishProcessingFn({
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195 | status: request.status,
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196 | message: 'Empty HLS segment content at URL: ' + request.uri,
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197 | code: REQUEST_ERRORS.FAILURE,
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198 | xhr: request
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199 | }, segment);
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200 | }
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201 |
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202 | segment.map.bytes = new Uint8Array(request.response);
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203 | return finishProcessingFn(null, segment);
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204 | };
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205 | };
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206 |
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207 |
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208 |
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209 |
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210 |
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211 |
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212 |
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213 |
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214 |
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215 |
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216 |
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217 | var handleSegmentResponse = function handleSegmentResponse(segment, finishProcessingFn) {
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218 | return function (error, request) {
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219 | var response = request.response;
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220 | var errorObj = handleErrors(error, request);
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221 |
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222 | if (errorObj) {
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223 | return finishProcessingFn(errorObj, segment);
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224 | }
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225 |
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226 |
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227 | if (response.byteLength === 0) {
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228 | return finishProcessingFn({
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229 | status: request.status,
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230 | message: 'Empty HLS segment content at URL: ' + request.uri,
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231 | code: REQUEST_ERRORS.FAILURE,
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232 | xhr: request
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233 | }, segment);
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234 | }
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235 |
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236 | segment.stats = getRequestStats(request);
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237 |
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238 | if (segment.key) {
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239 | segment.encryptedBytes = new Uint8Array(request.response);
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240 | } else {
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241 | segment.bytes = new Uint8Array(request.response);
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242 | }
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243 |
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244 | return finishProcessingFn(null, segment);
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245 | };
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246 | };
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247 |
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248 |
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249 |
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250 |
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251 |
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252 |
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253 |
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254 |
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255 |
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256 | var decryptSegment = function decryptSegment(decrypter, segment, doneFn) {
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257 | var decryptionHandler = function decryptionHandler(event) {
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258 | if (event.data.source === segment.requestId) {
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259 | decrypter.removeEventListener('message', decryptionHandler);
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260 | var decrypted = event.data.decrypted;
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261 |
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262 | segment.bytes = new Uint8Array(decrypted.bytes, decrypted.byteOffset, decrypted.byteLength);
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263 | return doneFn(null, segment);
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264 | }
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265 | };
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266 |
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267 | decrypter.addEventListener('message', decryptionHandler);
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268 |
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269 |
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270 |
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271 | decrypter.postMessage((0, _binUtils.createTransferableMessage)({
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272 | source: segment.requestId,
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273 | encrypted: segment.encryptedBytes,
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274 | key: segment.key.bytes,
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275 | iv: segment.key.iv
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276 | }), [segment.encryptedBytes.buffer, segment.key.bytes.buffer]);
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277 | };
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278 |
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279 |
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280 |
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281 |
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282 |
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283 |
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284 |
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285 | var getMostImportantError = function getMostImportantError(errors) {
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286 | return errors.reduce(function (prev, err) {
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287 | return err.code > prev.code ? err : prev;
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288 | });
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289 | };
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290 |
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291 |
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292 |
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293 |
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294 |
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295 |
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296 |
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297 |
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298 |
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299 |
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300 |
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301 |
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302 | var waitForCompletion = function waitForCompletion(activeXhrs, decrypter, doneFn) {
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303 | var errors = [];
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304 | var count = 0;
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305 |
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306 | return function (error, segment) {
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307 | if (error) {
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308 |
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309 | abortAll(activeXhrs);
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310 | errors.push(error);
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311 | }
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312 | count += 1;
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313 |
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314 | if (count === activeXhrs.length) {
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315 |
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316 | segment.endOfAllRequests = Date.now();
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317 |
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318 | if (errors.length > 0) {
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319 | var worstError = getMostImportantError(errors);
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320 |
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321 | return doneFn(worstError, segment);
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322 | }
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323 | if (segment.encryptedBytes) {
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324 | return decryptSegment(decrypter, segment, doneFn);
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325 | }
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326 |
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327 | return doneFn(null, segment);
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328 | }
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329 | };
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330 | };
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331 |
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332 |
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333 |
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334 |
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335 |
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336 |
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337 |
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338 |
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339 |
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340 |
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341 |
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342 | var handleProgress = function handleProgress(segment, progressFn) {
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343 | return function (event) {
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344 | segment.stats = _videoJs2['default'].mergeOptions(segment.stats, getProgressStats(event));
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345 |
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346 |
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347 | if (!segment.stats.firstBytesReceivedAt && segment.stats.bytesReceived) {
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348 | segment.stats.firstBytesReceivedAt = Date.now();
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349 | }
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350 |
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351 | return progressFn(event, segment);
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352 | };
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353 | };
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354 |
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355 |
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356 |
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357 |
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358 |
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359 |
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360 |
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361 |
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362 |
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365 |
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366 |
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367 |
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397 |
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398 |
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399 |
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400 |
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401 |
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402 |
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403 | var mediaSegmentRequest = function mediaSegmentRequest(xhr, xhrOptions, decryptionWorker, segment, progressFn, doneFn) {
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404 | var activeXhrs = [];
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405 | var finishProcessingFn = waitForCompletion(activeXhrs, decryptionWorker, doneFn);
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406 |
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407 |
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408 | if (segment.key) {
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409 | var keyRequestOptions = _videoJs2['default'].mergeOptions(xhrOptions, {
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410 | uri: segment.key.resolvedUri,
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411 | responseType: 'arraybuffer'
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412 | });
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413 | var keyRequestCallback = handleKeyResponse(segment, finishProcessingFn);
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414 | var keyXhr = xhr(keyRequestOptions, keyRequestCallback);
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415 |
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416 | activeXhrs.push(keyXhr);
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417 | }
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418 |
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419 |
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420 | if (segment.map && !segment.map.bytes) {
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421 | var initSegmentOptions = _videoJs2['default'].mergeOptions(xhrOptions, {
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422 | uri: segment.map.resolvedUri,
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423 | responseType: 'arraybuffer',
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424 | headers: segmentXhrHeaders(segment.map)
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425 | });
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426 | var initSegmentRequestCallback = handleInitSegmentResponse(segment, finishProcessingFn);
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427 | var initSegmentXhr = xhr(initSegmentOptions, initSegmentRequestCallback);
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428 |
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429 | activeXhrs.push(initSegmentXhr);
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430 | }
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431 |
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432 | var segmentRequestOptions = _videoJs2['default'].mergeOptions(xhrOptions, {
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433 | uri: segment.resolvedUri,
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434 | responseType: 'arraybuffer',
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435 | headers: segmentXhrHeaders(segment)
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436 | });
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437 | var segmentRequestCallback = handleSegmentResponse(segment, finishProcessingFn);
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438 | var segmentXhr = xhr(segmentRequestOptions, segmentRequestCallback);
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439 |
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440 | segmentXhr.addEventListener('progress', handleProgress(segment, progressFn));
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441 | activeXhrs.push(segmentXhr);
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442 |
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443 | return function () {
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444 | return abortAll(activeXhrs);
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445 | };
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446 | };
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447 | exports.mediaSegmentRequest = mediaSegmentRequest; |
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