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Adding emscripten files

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Alberto Pettarin
2016-10-27 18:09:45 +02:00
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emscripten/.gitignore
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*.o
*.out
*.pkl
espeakng_data_package.js
glue.*
espeakng.worker.*
pthread-main.js
emscripten/COPYING
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<http://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.
emscripten/README.md
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# espeakng.js
This port of
[eSpeak-ng](https://github.com/espeak-ng/espeak-ng)
to Javascript via
[emscripten](http://emscripten.org)
allows client-side text-to-speech synthesis in any browser
supporting Web workers and the Web Audio API.
* Version: 1.49.0
* Date: 2016-10-27
* License: the GNU General Public License, Version 3 (GPLv3)
* Size: 3.0 MB (including all the voices)
## Demo
For an online demo, visit [this page](https://www.readbeyond.it/espeakng/).
If you prefer a local demo, open the file `demo.html` in your browser.
(Depending on your browser, you might need to serve it via a Web server.
A simple way consists in calling `$ python -m SimpleHTTPServer 8000`
and pointing your browser to `http://localhost:8000/demo.html`)
## Usage
1. Include `js/espeakng.js` in your HTML file:
```html
<script type="text/javascript" src="js/espeakng.js"></script>
```
2. Create a new `eSpeakNG` instance with the path of the worker (e.g., `espeakng.worker.js`) as the first argument.
You can supply a callback function that will be called once the worker is ready:
```js
<script>
var espeakng = new eSpeakNG('js/espeakng.worker.js', function(){
// now you can use espeakng
...
});
</script>
```
3. Functions exposed by the `eSpeakNG` object:
* `list_voices(cb(voices))`: obtain the list of available voices, passing it (`voices`) to the callback function `cb`
* `set_rate(value)`: set the rate of the synthesized speech, `value` must be an integer in `[80..450]`, default `175`
* `set_pitch(value)`: set the pitch of the synthesized speech, `value` must be an integer in `[0..99]`, default `50`
* `set_voice.apply(espeakng, voice)`: set the voice for synthesizing speech, `voice` must be the code string for the desired voice (e.g., `en`, `en-us`, `it`, etc.)
* `synthesize(text, cb(samples, events))`: synthesize the given string `text` and call the callback function `cb` when done, passing the generated audio samples (`samples`) and events (`events`)
See the file `demo.html` for details.
## Download
You can download pre-built JS files from the [Releases page](https://github.com/pettarin/espeak-ng/releases).
TODO: add the compiled JS files to a public free CDN, and list the URL here.
## Building
1. Make sure you have `emscripten` [installed and activated](http://kripken.github.io/emscripten-site/docs/getting_started/downloads.html).
2. Clone the repo and enter the `espeak-ng` directory:
```bash
$ git clone https://github.com/espeak-ng/espeak-ng
$ cd espeak-ng
```
3. Compile `espeak-ng`:
```bash
$ ./autogen.sh
$ ./configure --prefix=/usr --without-async --without-mbrola --without-sonic
$ make
```
4. Recompile `espeak-ng` with `emconfigure` and `emmake`:
```bash
$ emconfigure ./configure --prefix=/usr --without-async --without-mbrola --without-sonic
$ emmake make
```
Note: the `emmake make` command currently exits
with the error `recipe for target 'phsource/phonemes.stamp' failed`,
but you can safely ignore it.
(TODO: fix this issue.)
5. Enter the `emscripten` directory and compile the JS worker with `emmake`:
```bash
$ cd emscripten
$ emmake make
```
6. The `js/` directory should contain the output JS files:
* `espeakng.js`,
* `espeakng.worker.js`, and
* `espeakng.worker.data`.
### Notes
* If you want to build only a single voice, for example the English one,
run `$ make en` instead of `$ make` at step 3.
You can also build a subset of all the available voices,
by running (say) `$ make en && make it && make fr && make es`.
Note that `list_voices()` will still list all available voices,
but if you try using one that has not been compiled,
you will get a runtime error.
(TODO: fix this issue.)
* The `-O3` optimization flag is passed to `emscripten` by default,
achieving a considerable reduction of the size of the generated JS worker.
If you want to omit it, for example for debug purposes,
just `$ export EM_DEBUG=1` before calling `emmake make` in step 5.
* To remove intermediate files compiled by emscripten,
keeping only the JS worker files, run `$ emmake clean-intermediate`.
* To remove all the files compiled by emscripten, run `$ emmake clean`.
## Credits
[Eitan Isaacson](https://blog.monotonous.org/) wrote the [original glue code](https://github.com/eeejay/espeak/tree/emscripten) for compiling eSpeak to Javascript via emscripten.
[Alberto Pettarin](http://www.albertopettarin.it) adapted Eitan's files [to work with eSpeak-ng](https://github.com/pettarin/espeak-ng/tree/emscripten) and wrote this `README` file.
emscripten/espeakng_glue.cpp
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/*
* Copyright (C) 2014-2016 Eitan Isaacson
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see: <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <emscripten.h>
#include "speak_lib.h"
static int gSamplerate = 0;
class eSpeakNGWorker {
public:
eSpeakNGWorker() : rate(espeakRATE_NORMAL), pitch(50), current_voice(NULL) {
if (!gSamplerate) {
gSamplerate = espeak_Initialize(
AUDIO_OUTPUT_SYNCHRONOUS, 100, NULL, espeakINITIALIZE_DONT_EXIT);
}
samplerate = gSamplerate;
voices = espeak_ListVoices(NULL);
}
void synth_(const char* aText, void* aCallback) {
t_espeak_callback* cb = reinterpret_cast<t_espeak_callback*>(aCallback);
espeak_SetSynthCallback(cb);
espeak_SetParameter(espeakPITCH, pitch, 0);
espeak_SetParameter(espeakRATE, rate, 0);
if (current_voice)
espeak_SetVoiceByProperties(current_voice);
else
espeak_SetVoiceByName("default");
espeak_Synth(aText, 0, 0, POS_CHARACTER, 0, 0, NULL, NULL);
// Reset callback so other instances will work too.
espeak_SetSynthCallback(NULL);
}
void set_voice(
const char* aName,
const char* aLang,
unsigned char aGender=0,
unsigned char aAge=0,
unsigned char aVariant = 0
) {
espeak_VOICE props = { 0 };
props.name = aName;
props.languages = aLang;
props.gender = aGender;
props.age = aAge;
props.variant = aVariant;
// This way we don't need to allocate the name/lang strings to the heap.
// Instead, we store the actual global voice.
espeak_SetVoiceByProperties(&props);
current_voice = espeak_GetCurrentVoice();
}
int getSizeOfEventStruct_() {
return sizeof(espeak_EVENT);
}
const espeak_VOICE** voices;
int samplerate;
int rate;
int pitch;
private:
espeak_VOICE* current_voice;
};
#include <glue.cpp>
emscripten/espeakng_glue.idl
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/*
* Copyright (C) 2014-2016 Eitan Isaacson
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see: <http://www.gnu.org/licenses/>.
*/
interface espeak_VOICE {
[Const] attribute DOMString name;
readonly attribute byte[] languages;
[Const] attribute DOMString identifier;
attribute octet gender;
attribute octet age;
attribute octet variant;
attribute octet xx1;
attribute long score;
attribute any spare;
};
enum espeak_EVENT_TYPE {
"espeakEVENT_LIST_TERMINATED",
"espeakEVENT_WORD",
"espeakEVENT_SENTENCE",
"espeakEVENT_MARK",
"espeakEVENT_PLAY",
"espeakEVENT_END",
"espeakEVENT_MSG_TERMINATED",
"espeakEVENT_PHONEME",
"espeakEVENT_SAMPLERATE"
};
interface espeak_EVENT {
readonly attribute espeak_EVENT_TYPE type;
readonly attribute unsigned long unique_identifier;
readonly attribute long text_position;
readonly attribute long length;
readonly attribute long audio_position;
readonly attribute long sample;
readonly attribute any user_data;
};
interface eSpeakNGWorker {
void eSpeakNGWorker();
void synth_(DOMString aText, VoidPtr aCallback);
long getSizeOfEventStruct_();
void set_voice(DOMString aName, DOMString aLang, optional octet gender=0, optional octet age=0, optional octet aVariant=0);
[Const] attribute espeak_VOICE[] voices;
readonly attribute long samplerate;
attribute long rate;
attribute long pitch;
};
emscripten/js/demo.js
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/*
* Copyright (C) 2014-2016 Eitan Isaacson
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see: <http://www.gnu.org/licenses/>.
*/
/* An audio node that can have audio chunks pushed to it */
function PushAudioNode(context, start_callback, end_callback, buffer_size) {
this.context = context;
this.start_callback = start_callback;
this.end_callback = end_callback;
this.buffer_size = buffer_size || 4096;
this.samples_queue = [];
this.scriptNode = context.createScriptProcessor(this.buffer_size, 1, 1);
this.connected = false;
this.sinks = [];
this.startTime = 0;
this.closed = false;
this.track_callbacks = new Map();
}
PushAudioNode.prototype.push = function(chunk) {
if (this.closed) {
throw 'Cannot push more chunks after node was closed';
}
this.samples_queue.push(chunk);
if (!this.connected) {
if (!this.sinks.length) {
throw 'No destination set for PushAudioNode';
}
this._do_connect();
}
}
PushAudioNode.prototype.close = function() {
this.closed = true;
}
PushAudioNode.prototype.connect = function(dest) {
this.sinks.push(dest);
if (this.samples_queue.length) {
this._do_connect();
}
}
PushAudioNode.prototype._do_connect = function() {
if (this.connected) return;
this.connected = true;
for (var dest of this.sinks) {
this.scriptNode.connect(dest);
}
this.scriptNode.onaudioprocess = this.handleEvent.bind(this);
}
PushAudioNode.prototype.disconnect = function() {
this.scriptNode.onaudioprocess = null;
this.scriptNode.disconnect();
this.connected = false;
}
PushAudioNode.prototype.addTrackCallback = function(aTimestamp, aCallback) {
var callbacks = this.track_callbacks.get(aTimestamp) || [];
callbacks.push(aCallback);
this.track_callbacks.set(aTimestamp, callbacks);
}
PushAudioNode.prototype.handleEvent = function(evt) {
if (!this.startTime) {
this.startTime = evt.playbackTime;
if (this.start_callback) {
this.start_callback();
}
}
var currentTime = evt.playbackTime - this.startTime;
var playbackDuration = this.scriptNode.bufferSize / this.context.sampleRate;
for (var entry of this.track_callbacks) {
var timestamp = entry[0];
var callbacks = entry[1];
if (timestamp < currentTime) {
this.track_callbacks.delete(timestamp);
} else if (timestamp < currentTime + playbackDuration) {
for (var cb of callbacks) {
cb();
}
this.track_callbacks.delete(timestamp);
}
}
var offset = 0;
while (this.samples_queue.length && offset < evt.target.bufferSize) {
var chunk = this.samples_queue[0];
var to_copy = chunk.subarray(0, evt.target.bufferSize - offset);
if (evt.outputBuffer.copyToChannel) {
evt.outputBuffer.copyToChannel(to_copy, 0, offset);
} else {
evt.outputBuffer.getChannelData(0).set(to_copy, offset);
}
offset += to_copy.length;
chunk = chunk.subarray(to_copy.length);
if (chunk.length)
this.samples_queue[0] = chunk;
else
this.samples_queue.shift();
}
if (!this.samples_queue.length && this.closed) {
if (this.end_callback) {
this.end_callback(evt.playbackTime - this.startTime);
}
this.disconnect();
}
}
/* Code specific to the demo */
var ctx = new (window.AudioContext || window.webkitAudioContext)();
var tts;
var pusher;
var pusher_buffer_size = 4096;
var chunkID = 0;
function stop() {
console.log('Inside stop()');
if (pusher) {
console.log(' Calling pusher.disconnect...');
pusher.disconnect();
console.log(' Calling pusher.disconnect... done');
pusher = null;
}
console.log('Leaving stop()');
} // end of stop()
function speak() {
console.log('Inside speak()');
console.log(' Stopping...');
stop();
console.log(' Stopping... done');
console.log(' Setting rate...');
tts.set_rate(Number(document.getElementById('rate').value));
console.log(' Setting rate... done');
console.log(' Setting pitch...');
tts.set_pitch(Number(document.getElementById('pitch').value));
console.log(' Setting pitch... done');
console.log(' Setting voice...');
tts.set_voice.apply(tts, (document.getElementById('voice').value.split(',')));
console.log(' Setting voice... done');
var now = Date.now();
chunkID = 0;
console.log(' Creating pusher...');
pusher = new PushAudioNode(
ctx,
function() {
//console.log('PushAudioNode started!', ctx.currentTime, pusher.startTime);
},
function() {
//console.log('PushAudioNode ended!', ctx.currentTime - pusher.startTime);
},
pusher_buffer_size
);
pusher.connect(ctx.destination);
console.log(' Creating pusher... done');
// actual synthesis
console.log(' Calling synthesize...');
tts.synthesize(
document.getElementById('texttospeak').value,
function cb(samples, events) {
//console.log(' Inside synt cb');
if (!samples) {
if (pusher) {
pusher.close();
}
return;
}
if (pusher) {
//console.log(' Pushing chunk ' + chunkID, Date.now());
pusher.push(new Float32Array(samples));
++chunkID;
}
if (now) {
//console.log(' Latency:', Date.now() - now);
now = 0;
}
//console.log(' Leaving synt cb');
} // end of function cb
); // end of tts.synthesize()
console.log(' Calling synthesize... done');
console.log('Leaving speak()');
} // end of speak()
function resetPitch() {
document.getElementById('pitch').value = 50;
}
function resetRate() {
document.getElementById('rate').value = 175;
}
function resetVoice() {
document.getElementById('default-voice').selected = true;
}
function initializeDemo() {
console.log('Creating eSpeakNG instance...');
tts = new eSpeakNG(
'js/espeakng.worker.js',
function cb1() {
console.log('Inside cb1');
tts.list_voices(
function cb2(result) {
console.log('Inside cb2');
var sel = document.getElementById('voice');
var index = 0;
for (voice of result) {
for (lang of voice.languages) {
var opt = document.createElement('option');
opt.text = voice.name + ' (' + lang.name + ')';
opt.value = [voice.name, lang.name];
console.log('Adding voice: ' + opt.text);
sel.add(opt);
if (voice.name === 'default') {
opt.id = 'default-voice';
opt.selected = true;
}
}
}
console.log('Leaving cb2');
} // end of function cb2
);
console.log('Removing loading class...');
document.body.classList.remove('loading');
console.log('Removing loading class... done');
console.log('Leaving cb1');
} // end of function cb1
);
console.log('Creating eSpeakNG instance... done');
}
emscripten/js/espeakng.js
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/*
* Copyright (C) 2014-2016 Eitan Isaacson
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see: <http://www.gnu.org/licenses/>.
*/
function eSpeakNG(worker_path, ready_cb) {
this.worker = new Worker(worker_path);
this.ready = false;
this.worker.onmessage = function(e) {
if (e.data !== 'ready') {
return;
}
this.worker.onmessage = null;
this.worker.addEventListener('message', this);
this.ready = true;
if (ready_cb) {
ready_cb();
}
}.bind(this);
}
eSpeakNG.prototype.handleEvent = function (evt) {
var callback = evt.data.callback;
if (callback && this[callback]) {
this[callback].apply(this, evt.data.result);
if (evt.data.done) {
delete this[callback];
}
return;
}
};
function _createAsyncMethod(method) {
return function() {
var lastArg = arguments[arguments.length - 1];
var message = { method: method, args: Array.prototype.slice.call(arguments, 0) };
if (typeof lastArg == 'function') {
var callback = '_' + method + '_' + Math.random().toString().substring(2) +'_cb';
this[callback] = lastArg;
message.args.pop();
message.callback = callback;
}
this.worker.postMessage(message);
};
}
for (var method of [
'list_voices',
'get_rate',
'get_pitch',
'set_rate',
'set_pitch',
'set_voice',
'synthesize'
]) {
eSpeakNG.prototype[method] = _createAsyncMethod(method);
}
emscripten/post.js
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/*
* Copyright (C) 2014-2016 Eitan Isaacson
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see: <http://www.gnu.org/licenses/>.
*/
eSpeakNGWorker.prototype.list_voices = function() {
var voices = [];
var i;
for (var voice = this.get_voices(i = 0); voice.ptr != 0; voice = this.get_voices(++i)) {
var v = {
name: voice.get_name(),
identifier: voice.get_identifier(),
languages: [],
}
var ii = 0;
var byte = voice.get_languages(ii);
function nullTerminatedString(offset) {
var str = '';
var index = offset;
var b = voice.get_languages(index++);
while (b != 0) {
str += String.fromCharCode(b);
b = voice.get_languages(index++);
}
return str;
}
while (byte != 0) {
var lang = { priority: byte, name: nullTerminatedString(++ii) }
v.languages.push(lang);
ii += lang.name.length + 1;
byte = voice.get_languages(ii);
}
voices.push(v);
}
return voices;
};
var eventTypes = [
'list_terminated',
'word',
'sentence',
'mark',
'play',
'end',
'msg_terminated',
'phoneme',
'samplerate'
]
eSpeakNGWorker.prototype.synthesize = function (aText, aCallback) {
var eventStructSize = this.getSizeOfEventStruct_();
function cb(ptr, length, events_pointer) {
var data = new Float32Array(length*2);
for (var i = 0; i < length; i++) {
data[i*2] = Math.max(-1, Math.min(1, getValue(ptr + i*2, 'i16') / 32768));
data[i*2+1] = data[i*2];
}
var events = [];
var ptr = events_pointer;
for (ev = wrapPointer(ptr, espeak_EVENT);
ev.get_type() != Module.espeakEVENT_LIST_TERMINATED;
ev = wrapPointer((ptr += eventStructSize), espeak_EVENT)) {
events.push({
type: eventTypes[ev.get_type()],
text_position: ev.get_text_position(),
word_length: ev.get_length(),
audio_position: ev.get_audio_position()
});
}
return aCallback(data, events) ? 1 : 0;
}
var fp = Runtime.addFunction(cb);
this.synth_(aText, fp);
Runtime.removeFunction(fp);
};
// Make this a worker
if (typeof WorkerGlobalScope !== 'undefined') {
var worker;
Module.postRun.push(function () {
worker = new eSpeakNGWorker();
postMessage('ready');
});
onmessage = function(e) {
if (!worker) {
throw 'eSpeakNGWorker worker not initialized';
}
var args = e.data.args;
var message = { callback: e.data.callback, done: true };
if (e.data.method == 'synthesize') {
args.push(function(samples, events) {
postMessage(
{ callback: e.data.callback,
result: [samples.buffer, events] }, [samples.buffer]);
});
}
message.result = [worker[e.data.method].apply(worker, args)];
if (e.data.callback)
postMessage(message);
}
}
emscripten/pre.js
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/*
* Copyright (C) 2014-2016 Eitan Isaacson
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see: <http://www.gnu.org/licenses/>.
*/