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How to use processDownMix method in wpt
Best JavaScript code snippet using wpt
mixing-rules.js
Source:mixing-rules.js 
...83 }84 } else if (input.numberOfChannels < output.numberOfChannels) {85 processUpMix(input, output);86 } else {87 processDownMix(input, output);88 }89}90/**91 * In-place summing to |output| based on 'discrete' channel interpretation.92 * @param {AudioBuffer} input Input audio buffer.93 * @param {AudioBuffer} output Output audio buffer.94 */95function discreteSum(input, output) {96 if (input.length != output.length) {97 throw '[mixing-rules.js] speakerSum(): buffer lengths mismatch (input: '98 + input.length + ', output: ' + output.length + ')';99 }100 var numberOfChannels = Math.min(input.numberOfChannels, output.numberOfChannels)101 for (var channel = 0; channel < numberOfChannels; ++channel) {102 var inputChannel = input.getChannelData(channel);103 var outputChannel = output.getChannelData(channel);104 for (var i = 0; i < outputChannel.length; i++)105 outputChannel[i] += inputChannel[i];106 }107}108/**109 * Perform up-mix by in-place summing to |output| buffer.110 * @param {AudioBuffer} input Input audio buffer.111 * @param {AudioBuffer} output Output audio buffer.112 */113function processUpMix(input, output) {114 var numberOfInputChannels = input.numberOfChannels;115 var numberOfOutputChannels = output.numberOfChannels;116 var i, length = output.length;117 // Up-mixing: 1 -> 2, 1 -> 4118 // output.L += input119 // output.R += input120 // output.SL += 0 (in the case of 1 -> 4)121 // output.SR += 0 (in the case of 1 -> 4)122 if ((numberOfInputChannels === 1 && numberOfOutputChannels === 2) ||123 (numberOfInputChannels === 1 && numberOfOutputChannels === 4)) {124 var inputChannel = input.getChannelData(0);125 var outputChannel0 = output.getChannelData(0);126 var outputChannel1 = output.getChannelData(1);127 for (i = 0; i < length; i++) {128 outputChannel0[i] += inputChannel[i];129 outputChannel1[i] += inputChannel[i];130 }131 return;132 }133 // Up-mixing: 1 -> 5.1134 // output.L += 0135 // output.R += 0136 // output.C += input137 // output.LFE += 0138 // output.SL += 0139 // output.SR += 0140 if (numberOfInputChannels == 1 && numberOfOutputChannels == 6) {141 var inputChannel = input.getChannelData(0);142 var outputChannel2 = output.getChannelData(2);143 for (i = 0; i < length; i++)144 outputChannel2[i] += inputChannel[i];145 return;146 }147 // Up-mixing: 2 -> 4, 2 -> 5.1148 // output.L += input.L149 // output.R += input.R150 // output.C += 0 (in the case of 2 -> 5.1)151 // output.LFE += 0 (in the case of 2 -> 5.1)152 // output.SL += 0153 // output.SR += 0154 if ((numberOfInputChannels === 2 && numberOfOutputChannels === 4) ||155 (numberOfInputChannels === 2 && numberOfOutputChannels === 6)) {156 var inputChannel0 = input.getChannelData(0);157 var inputChannel1 = input.getChannelData(1);158 var outputChannel0 = output.getChannelData(0);159 var outputChannel1 = output.getChannelData(1);160 for (i = 0; i < length; i++) {161 outputChannel0[i] += inputChannel0[i];162 outputChannel1[i] += inputChannel1[i];163 }164 return;165 }166 // Up-mixing: 4 -> 5.1167 // output.L += input.L168 // output.R += input.R169 // output.C += 0170 // output.LFE += 0171 // output.SL += input.SL172 // output.SR += input.SR173 if (numberOfInputChannels === 4 && numberOfOutputChannels === 6) {174 var inputChannel0 = input.getChannelData(0); // input.L175 var inputChannel1 = input.getChannelData(1); // input.R176 var inputChannel2 = input.getChannelData(2); // input.SL177 var inputChannel3 = input.getChannelData(3); // input.SR178 var outputChannel0 = output.getChannelData(0); // output.L179 var outputChannel1 = output.getChannelData(1); // output.R180 var outputChannel4 = output.getChannelData(4); // output.SL181 var outputChannel5 = output.getChannelData(5); // output.SR182 for (i = 0; i < length; i++) {183 outputChannel0[i] += inputChannel0[i];184 outputChannel1[i] += inputChannel1[i];185 outputChannel4[i] += inputChannel2[i];186 outputChannel5[i] += inputChannel3[i];187 }188 return;189 }190 // All other cases, fall back to the discrete sum.191 discreteSum(input, output);192}193/**194 * Perform down-mix by in-place summing to |output| buffer.195 * @param {AudioBuffer} input Input audio buffer.196 * @param {AudioBuffer} output Output audio buffer.197 */198function processDownMix(input, output) {199 var numberOfInputChannels = input.numberOfChannels;200 var numberOfOutputChannels = output.numberOfChannels;201 var i, length = output.length;202 // Down-mixing: 2 -> 1203 // output += 0.5 * (input.L + input.R)204 if (numberOfInputChannels === 2 && numberOfOutputChannels === 1) {205 var inputChannel0 = input.getChannelData(0); // input.L206 var inputChannel1 = input.getChannelData(1); // input.R207 var outputChannel0 = output.getChannelData(0);208 for (i = 0; i < length; i++)209 outputChannel0[i] += 0.5 * (inputChannel0[i] + inputChannel1[i]);210 return;211 }212 // Down-mixing: 4 -> 1...
Using AI Code Generation
1var wptools = require('wptools');2var wp = wptools.page('Barack Obama');3wp.processDownMix(function(err, result) {4 if (err) {5 console.log(err);6 } else {7 console.log(result);8 }9});10{ 11 {
Using AI Code Generation
1var wptoolkit = require('wptoolkit');2var input = 'input.wav';3var output = 'output.wav';4wptoolkit.processDownMix(input, output, function(err, result) {5 if (err) {6 console.log('Error: ' + err);7 } else {8 console.log('Success');9 }10});11Copyright (c) 2018, WPTOOLKIT
Using AI Code Generation
1var wptoolkit = require('wptoolkit');2wptoolkit.processDownMix('test.wav', 'test.mp3', function(err, result){3 if(err){4 console.log(err);5 }6 else{7 console.log(result);8 }9});10var wptoolkit = require('wptoolkit');11wptoolkit.processDownMix('test.wav', 'test.mp3', function(err, result){12 if(err){13 console.log(err);14 }15 else{16 console.log(result);17 }18});19var wptoolkit = require('wptoolkit');20wptoolkit.processDownMix('test.wav', 'test.mp3', function(err, result){21 if(err){22 console.log(err);23 }24 else{25 console.log(result);26 }27});28var wptoolkit = require('wptoolkit');29wptoolkit.processDownMix('test.wav', 'test.mp3', function(err, result){30 if(err){31 console.log(err);32 }33 else{34 console.log(result);35 }36});37var wptoolkit = require('wptoolkit');38wptoolkit.processDownMix('test.wav', 'test.mp3', function(err, result){39 if(err){40 console.log(err);41 }42 else{43 console.log(result);44 }45});
Using AI Code Generation
1var wptool = require('wptool');2var path = require('path');3var fs = require('fs');4var dir = path.join(__dirname, 'data');5var files = fs.readdirSync(dir);6var options = {7};8files.forEach(function(file) {9 var filepath = path.join(dir, file);10 wptool.processDownMix(filepath, options, function(err, data) {11 if (err) {12 console.log('error', err);13 } else {14 console.log('success', data);15 }16 });17});
Using AI Code Generation
1var wptoolkit = require('wptoolkit');2var options = {3};4wptoolkit.processDownMix(options, function(err, data) {5 if (err) {6 console.log(err);7 } else {8 console.log(data);9 }10});11var wptoolkit = require('wptoolkit');12var options = {13};14wptoolkit.processDownMix(options, function(err, data) {15 if (err) {16 console.log(err);17 } else {18 console.log(data);19 }20});21var wptoolkit = require('wptoolkit');22var options = {23};24wptoolkit.processDownMix(options, function(err, data) {25 if (err) {26 console.log(err);27 } else {28 console.log(data);29 }30});31var wptoolkit = require('wptoolkit');32var options = {33};34wptoolkit.processDownMix(options, function(err, data) {35 if (err) {36 console.log(err);37 } else {38 console.log(data);39 }40});41var wptoolkit = require('wptoolkit');42var options = {43};44wptoolkit.processDownMix(options, function(err, data) {45 if (err) {46 console.log(err);47 } else {48 console.log(data);49 }50});
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