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node-speak + node-airtunes to make my remote speakers entertain me.
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var speak = require("node-speak") | |
, airtunes = require('airtunes') | |
, Buffer = require('buffer').Buffer | |
, spawn = require('child_process').spawn | |
, streamBuffers = require("stream-buffers") | |
, argv = require('optimist') | |
.usage('Usage: $0 --host [host] --port [num] --ffmpeg [path] --words [string] --volume [num] --password [string]') | |
.default('port', 5000) | |
.default('volume', 50) | |
.default('ffmpeg', '/usr/local/bin/ffmpeg') | |
.default('words', 'All speech, written or spoken, is a dead language, until it finds a willing and prepared hearer.') | |
.demand(['host']) | |
.argv; | |
speak(argv.words, { | |
callback: function(src) { | |
console.log('speech processed!'); | |
console.log('adding device: ' + argv.host + ':' + argv.port); | |
var device = airtunes.add(argv.host, argv.port); | |
device.on('status', function(status) { | |
console.log('status: ' + status); | |
if (status !== 'ready') return; | |
var bufstream = new streamBuffers.ReadableStreamBuffer(); | |
bufstream.put(toBuffer(Base64Binary.decodeArrayBuffer(src.substring(24)))); | |
// convert the mono 22kHz pcm into stereo 44.1kHz | |
var ffmpeg = spawn(argv.ffmpeg, [ | |
'-i', 'pipe:0', // Input on stdin | |
'-acodec', 'pcm_s16le', // PCM 16bits, little-endian | |
'-ar', '44100', // Sampling rate | |
'-ac', 2, // Stereo | |
'-f', 'wav', | |
'pipe:1' // Output on stdout | |
]); | |
// detect if ffmpeg was not spawned correctly | |
ffmpeg.stderr.setEncoding('utf8'); | |
ffmpeg.stderr.on('data', function(data) { | |
if(/^execvp\(\)/.test(data)) { | |
console.log('failed to start ' + argv.ffmpeg); | |
process.exit(1); | |
} | |
}); | |
// pipe data to AirTunes | |
ffmpeg.stdout.pipe(airtunes); | |
bufstream.pipe(ffmpeg.stdin); | |
}); | |
// monitor buffer events | |
airtunes.on('buffer', function(status) { | |
console.log('buffer ' + status); | |
// after the playback ends, give some time to AirTunes devices | |
if(status === 'end') { | |
console.log('playback ended, waiting for AirTunes devices'); | |
setTimeout(function() { | |
airtunes.stopAll(function() { | |
console.log('end'); | |
process.exit(); | |
}); | |
}, 2000); | |
} | |
}); | |
} | |
}); | |
/* | |
Copyright (c) 2011, Daniel Guerrero | |
All rights reserved. | |
Redistribution and use in source and binary forms, with or without | |
modification, are permitted provided that the following conditions are met: | |
* Redistributions of source code must retain the above copyright | |
notice, this list of conditions and the following disclaimer. | |
* Redistributions in binary form must reproduce the above copyright | |
notice, this list of conditions and the following disclaimer in the | |
documentation and/or other materials provided with the distribution. | |
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND | |
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
DISCLAIMED. IN NO EVENT SHALL DANIEL GUERRERO BE LIABLE FOR ANY | |
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
*/ | |
/** | |
* Uses the new array typed in javascript to binary base64 encode/decode | |
* at the moment just decodes a binary base64 encoded | |
* into either an ArrayBuffer (decodeArrayBuffer) | |
* or into an Uint8Array (decode) | |
* | |
* References: | |
* https://developer.mozilla.org/en/JavaScript_typed_arrays/ArrayBuffer | |
* https://developer.mozilla.org/en/JavaScript_typed_arrays/Uint8Array | |
*/ | |
var Base64Binary = { | |
_keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=", | |
/* will return a Uint8Array type */ | |
decodeArrayBuffer: function(input) { | |
var bytes = (input.length/4) * 3; | |
var ab = new ArrayBuffer(bytes); | |
this.decode(input, ab); | |
return ab; | |
}, | |
decode: function(input, arrayBuffer) { | |
//get last chars to see if are valid | |
var lkey1 = this._keyStr.indexOf(input.charAt(input.length-1)); | |
var lkey2 = this._keyStr.indexOf(input.charAt(input.length-2)); | |
var bytes = (input.length/4) * 3; | |
if (lkey1 == 64) bytes--; //padding chars, so skip | |
if (lkey2 == 64) bytes--; //padding chars, so skip | |
var uarray; | |
var chr1, chr2, chr3; | |
var enc1, enc2, enc3, enc4; | |
var i = 0; | |
var j = 0; | |
if (arrayBuffer) | |
uarray = new Uint8Array(arrayBuffer); | |
else | |
uarray = new Uint8Array(bytes); | |
input = input.replace(/[^A-Za-z0-9\+\/\=]/g, ""); | |
for (i=0; i<bytes; i+=3) { | |
//get the 3 octects in 4 ascii chars | |
enc1 = this._keyStr.indexOf(input.charAt(j++)); | |
enc2 = this._keyStr.indexOf(input.charAt(j++)); | |
enc3 = this._keyStr.indexOf(input.charAt(j++)); | |
enc4 = this._keyStr.indexOf(input.charAt(j++)); | |
chr1 = (enc1 << 2) | (enc2 >> 4); | |
chr2 = ((enc2 & 15) << 4) | (enc3 >> 2); | |
chr3 = ((enc3 & 3) << 6) | enc4; | |
uarray[i] = chr1; | |
if (enc3 != 64) uarray[i+1] = chr2; | |
if (enc4 != 64) uarray[i+2] = chr3; | |
} | |
return uarray; | |
} | |
} | |
function toBuffer(ab) { | |
var buffer = new Buffer(ab.byteLength); | |
var view = new Uint8Array(ab); | |
for (var i = 0; i < buffer.length; ++i) { | |
buffer[i] = view[i]; | |
} | |
return buffer; | |
} |
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