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Wrapping speakClient with function. #17

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Wrapping speakClient with function. #17

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cf88c39
Wrap with function for flexible usage
Jan 24, 2012
a630ebe
Add support for onended callback, pause and resume function
Jan 24, 2012
67d11ba
Fix Bug
Jan 25, 2012
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176 changes: 94 additions & 82 deletions speakClient.js
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@@ -1,97 +1,109 @@
var speakWorker;
try {
speakWorker = new Worker('speakWorker.js');
} catch(e) {
console.log('speak.js warning: no worker support');
}
(function(window, undefined) {
var speakWorker;
try {
speakWorker = new Worker('speakWorker.js');
} catch(e) {
console.log('speak.js warning: no worker support');
}

window.pause = function() {
document.getElementById("player").pause();
}

window.resume = function() {
document.getElementById("player").play();
}

function speak(text, args) {
function parseWav(wav) {
function readInt(i, bytes) {
var ret = 0;
var shft = 0;
while (bytes) {
ret += wav[i] << shft;
shft += 8;
i++;
bytes--;
window.speak = function(text, args, onended) {
function parseWav(wav) {
function readInt(i, bytes) {
var ret = 0;
var shft = 0;
while (bytes) {
ret += wav[i] << shft;
shft += 8;
i++;
bytes--;
}
return ret;
}
return ret;
if (readInt(20, 2) != 1) throw 'Invalid compression code, not PCM';
if (readInt(22, 2) != 1) throw 'Invalid number of channels, not 1';
return {
sampleRate: readInt(24, 4),
bitsPerSample: readInt(34, 2),
samples: wav.subarray(44)
};
}
if (readInt(20, 2) != 1) throw 'Invalid compression code, not PCM';
if (readInt(22, 2) != 1) throw 'Invalid number of channels, not 1';
return {
sampleRate: readInt(24, 4),
bitsPerSample: readInt(34, 2),
samples: wav.subarray(44)
};
}

function playHTMLAudioElement(wav) {
function encode64(data) {
var BASE = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
var PAD = '=';
var ret = '';
var leftchar = 0;
var leftbits = 0;
for (var i = 0; i < data.length; i++) {
leftchar = (leftchar << 8) | data[i];
leftbits += 8;
while (leftbits >= 6) {
var curr = (leftchar >> (leftbits-6)) & 0x3f;
leftbits -= 6;
ret += BASE[curr];
function playHTMLAudioElement(wav) {
function encode64(data) {
var BASE = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
var PAD = '=';
var ret = '';
var leftchar = 0;
var leftbits = 0;
for (var i = 0; i < data.length; i++) {
leftchar = (leftchar << 8) | data[i];
leftbits += 8;
while (leftbits >= 6) {
var curr = (leftchar >> (leftbits-6)) & 0x3f;
leftbits -= 6;
ret += BASE[curr];
}
}
if (leftbits == 2) {
ret += BASE[(leftchar&3) << 4];
ret += PAD + PAD;
} else if (leftbits == 4) {
ret += BASE[(leftchar&0xf) << 2];
ret += PAD;
}
return ret;
}
if (leftbits == 2) {
ret += BASE[(leftchar&3) << 4];
ret += PAD + PAD;
} else if (leftbits == 4) {
ret += BASE[(leftchar&0xf) << 2];
ret += PAD;

document.getElementById("audio").innerHTML=("<audio id=\"player\" src=\"data:audio/x-wav;base64,"+encode64(wav)+"\">");
if (onended) {
document.getElementById("player").addEventListener('ended', onended);
}
return ret;
document.getElementById("player").play();
}

document.getElementById("audio").innerHTML=("<audio id=\"player\" src=\"data:audio/x-wav;base64,"+encode64(wav)+"\">");
document.getElementById("player").play();
}

function playAudioDataAPI(data) {
try {
var output = new Audio();
output.mozSetup(1, data.sampleRate);
var num = data.samples.length;
var buffer = data.samples;
var f32Buffer = new Float32Array(num);
for (var i = 0; i < num; i++) {
var value = buffer[i<<1] + (buffer[(i<<1)+1]<<8);
if (value >= 0x8000) value |= ~0x7FFF;
f32Buffer[i] = value / 0x8000;
function playAudioDataAPI(data) {
try {
var output = new Audio();
output.mozSetup(1, data.sampleRate);
var num = data.samples.length;
var buffer = data.samples;
var f32Buffer = new Float32Array(num);
for (var i = 0; i < num; i++) {
var value = buffer[i<<1] + (buffer[(i<<1)+1]<<8);
if (value >= 0x8000) value |= ~0x7FFF;
f32Buffer[i] = value / 0x8000;
}
output.mozWriteAudio(f32Buffer);
return true;
} catch(e) {
return false;
}
output.mozWriteAudio(f32Buffer);
return true;
} catch(e) {
return false;
}
}

function handleWav(wav) {
var data = parseWav(wav); // validate the data and parse it
function handleWav(wav) {
var data = parseWav(wav); // validate the data and parse it

// TODO: try playAudioDataAPI(data), and fallback if failed
playHTMLAudioElement(wav);
}
// TODO: try playAudioDataAPI(data), and fallback if failed
playHTMLAudioElement(wav);
}

if (args && args.noWorker) {
// Do everything right now. speakGenerator.js must have been loaded.
handleWav(generateSpeech(text, args));
} else {
// Call the worker, which will return a wav that we then play
speakWorker.onmessage = function(event) {
handleWav(event.data);
};
speakWorker.postMessage({ text: text, args: args });
if (args && args.noWorker) {
// Do everything right now. speakGenerator.js must have been loaded.
handleWav(generateSpeech(text, args));
} else {
// Call the worker, which will return a wav that we then play
speakWorker.onmessage = function(event) {
handleWav(event.data);
};
speakWorker.postMessage({ text: text, args: args });
}
}
}

})(window);