Created
October 2, 2016 22:32
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A small example Google Natural Language Analyzer demo client with microphone recording.
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| import java.io.FileOutputStream; | |
| import java.io.IOException; | |
| import java.util.ArrayList; | |
| import java.util.HashMap; | |
| import java.util.List; | |
| import javax.sound.sampled.*; | |
| import net.raysforge.commons.Codecs; | |
| import net.raysforge.commons.Json; | |
| import net.raysforge.rest.client.GenericRestClient; | |
| public class SpeechClient extends GenericRestClient { | |
| protected static final int SAMPLE_RATE = 16000; | |
| public SpeechClient(String authToken) { | |
| super("https://speech.googleapis.com/v1beta1/", null, authToken, Auth.Token); | |
| } | |
| public Object recordAndSyncrecognize(int seconds) throws IOException { | |
| countDown(seconds); | |
| return syncrecognize(Codecs.toBase64(record(seconds))); | |
| } | |
| public Object syncrecognize(byte[] rawAudioData) throws IOException { | |
| return syncrecognize(Codecs.toBase64(rawAudioData)); | |
| } | |
| public Object syncrecognize(String base64StringOfRawAudioData) throws IOException { | |
| List<String> phrases = new ArrayList<>(); | |
| phrases.add("ctree"); | |
| phrases.add("please"); | |
| phrases.add("create"); | |
| phrases.add("database"); | |
| phrases.add("called"); | |
| phrases.add("test"); | |
| String phrases2 = "ctree please create database called test"; | |
| HashMap<String, Object> speechContext = new HashMap<>(); | |
| speechContext.put("phrases", phrases2); | |
| HashMap<String, Object> config = new HashMap<>(); | |
| config.put("encoding", "LINEAR16"); | |
| config.put("sampleRate", 16000); | |
| config.put("languageCode", "en-US"); | |
| config.put("speechContext", speechContext); | |
| HashMap<String, Object> audio = new HashMap<>(); | |
| audio.put("content", base64StringOfRawAudioData); | |
| HashMap<String, Object> request = new HashMap<>(); | |
| request.put("config", config); | |
| request.put("audio", audio); | |
| System.out.println(Json.toJsonString(request)); | |
| return postData("POST", "speech:syncrecognize", Json.toJsonString(request)); | |
| } | |
| public static byte[] record(int seconds) { | |
| try { | |
| AudioFormat googleSpeechAudioFormat = new AudioFormat(SAMPLE_RATE, 16, 1, true, false); // https://cloud.google.com/speech/reference/rest/Shared.Types/AudioEncoding | |
| DataLine.Info info = new DataLine.Info(TargetDataLine.class, googleSpeechAudioFormat); | |
| // checks if system supports the data line | |
| if (!AudioSystem.isLineSupported(info)) { | |
| System.out.println("Line not supported"); | |
| System.exit(0); | |
| } | |
| TargetDataLine line = (TargetDataLine) AudioSystem.getLine(info); | |
| line.open(googleSpeechAudioFormat); | |
| line.start(); | |
| AudioInputStream ais = new AudioInputStream(line); | |
| byte[] b = new byte[SAMPLE_RATE * 2 * seconds]; | |
| int read = ais.read(b); | |
| if (read != b.length) | |
| System.out.println("read != " + b.length + " " + read); | |
| line.close(); | |
| return b; | |
| } catch (LineUnavailableException ex) { | |
| ex.printStackTrace(); | |
| } catch (IOException ioe) { | |
| ioe.printStackTrace(); | |
| } | |
| return null; | |
| } | |
| public static void countDown(int seconds) { | |
| new Thread(new Runnable() { | |
| @Override | |
| public void run() { | |
| for(int i=seconds; i>0; i--) { | |
| System.out.println(i); | |
| try { | |
| Thread.sleep(1000); | |
| } catch (InterruptedException e) { | |
| System.err.println(e.getMessage()); | |
| } | |
| } | |
| } | |
| }).start(); | |
| } | |
| public static void main(String[] args) throws IOException { | |
| SpeechClient nlc = new SpeechClient("yourAuthToken"); | |
| Object result = nlc.recordAndSyncrecognize(5); | |
| System.out.println(result); | |
| } | |
| } |
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