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package com.darkprograms.speech.synthesiser;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;
/**
* Synthesiser class that connects to Google's unoffical API to retreive data
*
* @author Luke Kuza, Aaron Gokaslan (Skylion)
*/
public class Synthesiser {
/**
* URL to query for Google synthesiser
*/
private final static String GOOGLE_SYNTHESISER_URL = "http://translate.google.com/translate_tts?tl=en&q=";
/**
* Constructor
*/
public Synthesiser() {
}
/**
* Gets an input stream to MP3 data for the returned information from a request
*
* @param synthText Text you want to be synthesized into MP3 data
* @return Returns an input stream of the MP3 data that is returned from Google
* @throws Exception Throws exception if it can not complete the request
*/
public InputStream getMP3Data(String synthText) throws Exception {
if(synthText.length()>99){
List<String> fragments = stringParser(synthText);
return getMP3Data(fragments);
}
String encoded = URLEncoder.encode(synthText, "UTF-8"); //Encode
URL url = new URL(GOOGLE_SYNTHESISER_URL + encoded); //create url
// Open New URL connection channel.
URLConnection urlConn = url.openConnection(); //Open connection
urlConn.addRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0) Gecko/20100101 Firefox/4.0"); //Adding header for user agent is required
return urlConn.getInputStream();
}
/**
* Gets an InputStream to MP3Data for the returned information from a request
* @param synthText List of Strings you want to be synthesized into MP3 data
* @return Returns an input stream of all the MP3 data that is returned from Google
* @throws Exception Throws exception if it cannot complete the request
*/
public InputStream getMP3Data(List<String> synthText) throws Exception{
InputStream complete = getMP3Data(synthText.remove(0));
for(String part: synthText){
complete = new java.io.SequenceInputStream(complete, getMP3Data(part));//Concatenate with new MP3 Data
}
return complete;
}
/**
* Separates a string into smaller parts so that Google will not reject the request.
* @param input The string you want to separate
* @return A List<String> of the String fragments from your input..
*/
private List<String> stringParser(String input){
return stringParser(input, new ArrayList<String>());
}
/**
* Separates a string into smaller parts so that Google will not reject the request.
* @param input The string you want to break up into smaller parts
* @param fragments List<String> that you want to add stuff too.
* If you don't have a List<String> already constructed "new ArrayList<String>()" works well.
* @return A list of the fragments of the original String
*/
private List<String> stringParser(String input, List<String> fragments){
if(input.length()<100){//Base Case
fragments.add(input);
return fragments;
}
else{
int space = findLastWord(input);//Checks if a space exists
if(space<0){
fragments.add(input.substring(0,99));//In case you sent gibberish to Google.
return stringParser(input.substring(99), fragments);
}else{
fragments.add(input.substring(0,space));//Otherwise, adds the last word to the list for recursion.
return stringParser(input.substring(space), fragments);
}
}
}
/**
* Finds the last word in your String (before the index of 99) by searching for spaces and ending punctuation.
* @param input The String you want to search through.
* @return The index of where the last word of the String ends before the index of 99.
*/
private int findLastWord(String input){
if(input.length()<100)
return input.length();
for(int i = 99; i>=0; i--){
char tmp = input.charAt(i);
if( tmp == ' ' || tmp == '.' || tmp == '!' || tmp == '?' || tmp == ';' || tmp == ':' || tmp == '؟'
|| tmp == '|'){ //Ending punctuation for all languages according to Wikipedia
return i;
}
}
return -1;
}
}
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