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Adds sync / async examples for local and remote files #503

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12 changes: 12 additions & 0 deletions speech/cloud-client/README.md
Original file line number Diff line number Diff line change
Expand Up @@ -24,3 +24,15 @@ You can then run a given `ClassName` via:
### Transcribe a local audio file (using the quickstart sample)

mvn exec:java -Dexec.mainClass=com.example.speech.QuickstartSample

### Transcribe a local audio file (using the recognize sample)
```
mvn exec:java -Dexec.mainClass=com.example.speech.Recognize \
-Dexec.args="syncrecognize ./resources/audio.raw"
```

### Transcribe a remote audio file (using the recognize sample)
```
mvn exec:java -Dexec.mainClass=com.example.speech.Recognize \
-Dexec.args="syncrecognize 'gs://cloud-samples-tests/speech/brooklyn.flac'"
```
Original file line number Diff line number Diff line change
Expand Up @@ -64,6 +64,7 @@ public static void main(String... args) throws Exception {
System.out.printf("Transcription: %s%n", alternative.getTranscript());
}
}
speech.close();
}
}
// [END speech_quickstart]
210 changes: 210 additions & 0 deletions speech/cloud-client/src/main/java/com/example/speech/Recognize.java
Original file line number Diff line number Diff line change
@@ -0,0 +1,210 @@
/*
Copyright 2017, Google Inc.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package com.example.speech;

import com.google.api.gax.grpc.OperationFuture;
import com.google.cloud.speech.spi.v1beta1.SpeechClient;
import com.google.cloud.speech.v1beta1.AsyncRecognizeResponse;
import com.google.cloud.speech.v1beta1.RecognitionAudio;
import com.google.cloud.speech.v1beta1.RecognitionConfig;
import com.google.cloud.speech.v1beta1.RecognitionConfig.AudioEncoding;
import com.google.cloud.speech.v1beta1.SpeechRecognitionAlternative;
import com.google.cloud.speech.v1beta1.SpeechRecognitionResult;
import com.google.cloud.speech.v1beta1.SyncRecognizeResponse;
import com.google.protobuf.ByteString;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.List;

public class Recognize {
public static void main(String... args) throws Exception {
if (args.length < 1) {
System.out.println("Usage:");
System.out.printf(
"\tjava %s \"<command>\" \"<path-to-image>\"\n"
+ "Commands:\n"
+ "\tsyncrecognize | asyncrecognize\n"
+ "Path:\n\tA file path (ex: ./resources/audio.raw) or a URI "
+ "for a Cloud Storage resource (gs://...)\n",
Recognize.class.getCanonicalName());
return;
}
String command = args[0];
String path = args.length > 1 ? args[1] : "";

// Use command and GCS path pattern to invoke transcription.
if (command.equals("syncrecognize")) {
if (path.startsWith("gs://")) {
syncRecognizeGcs(path);
} else {
syncRecognizeFile(path);
}
} else if (command.equals("asyncrecognize")) {
if (path.startsWith("gs://")) {
asyncRecognizeGcs(path);
} else {
asyncRecognizeFile(path);
}
}
}

/**
* Performs speech recognition on raw PCM audio and prints the transcription.
*
* @param fileName the path to a PCM audio file to transcribe.
*/
public static void syncRecognizeFile(String fileName) throws Exception, IOException {
SpeechClient speech = SpeechClient.create();

Path path = Paths.get(fileName);
byte[] data = Files.readAllBytes(path);
ByteString audioBytes = ByteString.copyFrom(data);

// Configure request with local raw PCM audio
RecognitionConfig config = RecognitionConfig.newBuilder()
.setEncoding(AudioEncoding.LINEAR16)
.setSampleRate(16000)
.build();
RecognitionAudio audio = RecognitionAudio.newBuilder()
.setContent(audioBytes)
.build();

// Use blocking call to get audio transcript
SyncRecognizeResponse response = speech.syncRecognize(config, audio);
List<SpeechRecognitionResult> results = response.getResultsList();

for (SpeechRecognitionResult result: results) {
List<SpeechRecognitionAlternative> alternatives = result.getAlternativesList();
for (SpeechRecognitionAlternative alternative: alternatives) {
System.out.printf("Transcription: %s%n", alternative.getTranscript());
}
}
speech.close();
}

/**
* Performs speech recognition on remote FLAC file and prints the transcription.
*
* @param gcsUri the path to the remote FLAC audio file to transcribe.
*/
public static void syncRecognizeGcs(String gcsUri) throws Exception, IOException {
// Instantiates a client with GOOGLE_APPLICATION_CREDENTIALS
SpeechClient speech = SpeechClient.create();

// Builds the request for remote FLAC file
RecognitionConfig config = RecognitionConfig.newBuilder()
.setEncoding(AudioEncoding.FLAC)
.setSampleRate(16000)
.build();
RecognitionAudio audio = RecognitionAudio.newBuilder()
.setUri(gcsUri)
.build();

// Use blocking call for getting audio transcript
SyncRecognizeResponse response = speech.syncRecognize(config, audio);
List<SpeechRecognitionResult> results = response.getResultsList();

for (SpeechRecognitionResult result: results) {
List<SpeechRecognitionAlternative> alternatives = result.getAlternativesList();
for (SpeechRecognitionAlternative alternative: alternatives) {
System.out.printf("Transcription: %s%n", alternative.getTranscript());
}
}
speech.close();
}

/**
* Performs non-blocking speech recognition on raw PCM audio and prints
* the transcription.
*
* @param fileName the path to a PCM audio file to transcribe.
*/
public static void asyncRecognizeFile(String fileName) throws Exception, IOException {
// Instantiates a client with GOOGLE_APPLICATION_CREDENTIALS
SpeechClient speech = SpeechClient.create();

Path path = Paths.get(fileName);
byte[] data = Files.readAllBytes(path);
ByteString audioBytes = ByteString.copyFrom(data);

// Configure request with local raw PCM audio
RecognitionConfig config = RecognitionConfig.newBuilder()
.setEncoding(AudioEncoding.LINEAR16)
.setSampleRate(16000)
.build();
RecognitionAudio audio = RecognitionAudio.newBuilder()
.setContent(audioBytes)
.build();

// Use non-blocking call for getting file transcription
OperationFuture<AsyncRecognizeResponse> response = speech.asyncRecognizeAsync(config, audio);
while (!response.isDone()) {
System.out.println("Waiting for response...");
Thread.sleep(200);
}

List<SpeechRecognitionResult> results = response.get().getResultsList();

for (SpeechRecognitionResult result: results) {
List<SpeechRecognitionAlternative> alternatives = result.getAlternativesList();
for (SpeechRecognitionAlternative alternative: alternatives) {
System.out.printf("Transcription: %s%n", alternative.getTranscript());
}
}
speech.close();
}

/**
* Performs non-blocking speech recognition on remote FLAC file and prints
* the transcription.
*
* @param gcsUri the path to the remote FLAC audio file to transcribe.
*/
public static void asyncRecognizeGcs(String gcsUri) throws Exception, IOException {
// Instantiates a client with GOOGLE_APPLICATION_CREDENTIALS
SpeechClient speech = SpeechClient.create();

// Configure remote file request for FLAC file
RecognitionConfig config = RecognitionConfig.newBuilder()
.setEncoding(AudioEncoding.FLAC)
.setSampleRate(16000)
.build();
RecognitionAudio audio = RecognitionAudio.newBuilder()
.setUri(gcsUri)
.build();

// Use non-blocking call for getting file transcription
OperationFuture<AsyncRecognizeResponse> response = speech.asyncRecognizeAsync(config, audio);
while (!response.isDone()) {
System.out.println("Waiting for response...");
Thread.sleep(200);
}

List<SpeechRecognitionResult> results = response.get().getResultsList();

for (SpeechRecognitionResult result: results) {
List<SpeechRecognitionAlternative> alternatives = result.getAlternativesList();
for (SpeechRecognitionAlternative alternative: alternatives) {
System.out.printf("Transcription: %s%n", alternative.getTranscript());
}
}
speech.close();
}
}
Original file line number Diff line number Diff line change
@@ -0,0 +1,82 @@
/*
Copyright 2017, Google, Inc.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package com.example.speech;

import static com.google.common.truth.Truth.assertThat;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

import java.io.ByteArrayOutputStream;
import java.io.PrintStream;

/**
* Tests for speech recognize sample.
*/
@RunWith(JUnit4.class)
@SuppressWarnings("checkstyle:abbreviationaswordinname")
public class RecognizeIT {
private ByteArrayOutputStream bout;
private PrintStream out;

// The path to the audio file to transcribe
private String fileName = "./resources/audio.raw";
private String gcsPath = "gs://cloud-samples-tests/speech/brooklyn.flac";

@Before
public void setUp() {
bout = new ByteArrayOutputStream();
out = new PrintStream(bout);
System.setOut(out);
}

@After
public void tearDown() {
System.setOut(null);
}

@Test
public void testRecognizeFile() throws Exception {
Recognize.syncRecognizeFile(fileName);
String got = bout.toString();
assertThat(got).contains("how old is the Brooklyn Bridge");
}

@Test
public void testRecognizeGcs() throws Exception {
Recognize.syncRecognizeGcs(gcsPath);
String got = bout.toString();
assertThat(got).contains("how old is the Brooklyn Bridge");
}

@Test
public void testAsyncRecognizeFile() throws Exception {
Recognize.asyncRecognizeFile(fileName);
String got = bout.toString();
assertThat(got).contains("how old is the Brooklyn Bridge");
}

@Test
public void testAsyncRecognizeGcs() throws Exception {
Recognize.asyncRecognizeGcs(gcsPath);
String got = bout.toString();
assertThat(got).contains("how old is the Brooklyn Bridge");
}
}