|
| 1 | +/* |
| 2 | + * Copyright 2017, Google Inc. All rights reserved. |
| 3 | + * |
| 4 | + * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | + * you may not use this file except in compliance with the License. |
| 6 | + * You may obtain a copy of the License at |
| 7 | + * |
| 8 | + * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | + * |
| 10 | + * Unless required by applicable law or agreed to in writing, software |
| 11 | + * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | + * See the License for the specific language governing permissions and |
| 14 | + * limitations under the License. |
| 15 | + */ |
| 16 | +package com.google.cloud.speech.spi.v1; |
| 17 | + |
| 18 | +import com.google.api.gax.grpc.ApiStreamObserver; |
| 19 | +import com.google.cloud.speech.v1.StreamingRecognitionConfig; |
| 20 | +import com.google.cloud.speech.v1.StreamingRecognizeRequest; |
| 21 | +import com.google.cloud.speech.v1.StreamingRecognizeResponse; |
| 22 | +import com.google.protobuf.ByteString; |
| 23 | +import java.io.OutputStream; |
| 24 | + |
| 25 | +public class StreamingRecognizer { |
| 26 | + public static OutputStream call( |
| 27 | + SpeechClient client, |
| 28 | + StreamingRecognitionConfig config, |
| 29 | + ApiStreamObserver<StreamingRecognizeResponse> responseObserver) { |
| 30 | + ApiStreamObserver<StreamingRecognizeRequest> requestObserver = |
| 31 | + client.streamingRecognizeCallable().bidiStreamingCall(responseObserver); |
| 32 | + requestObserver.onNext( |
| 33 | + StreamingRecognizeRequest.newBuilder().setStreamingConfig(config).build()); |
| 34 | + return new StreamWriter(requestObserver); |
| 35 | + } |
| 36 | + |
| 37 | + private static class StreamWriter extends OutputStream { |
| 38 | + private final ApiStreamObserver<StreamingRecognizeRequest> stream; |
| 39 | + |
| 40 | + private StreamWriter(ApiStreamObserver<StreamingRecognizeRequest> stream) { |
| 41 | + this.stream = stream; |
| 42 | + } |
| 43 | + |
| 44 | + @Override |
| 45 | + public void close() { |
| 46 | + stream.onCompleted(); |
| 47 | + } |
| 48 | + |
| 49 | + @Override |
| 50 | + public void write(byte[] b, int off, int len) { |
| 51 | + stream.onNext( |
| 52 | + StreamingRecognizeRequest.newBuilder() |
| 53 | + .setAudioContent(ByteString.copyFrom(b, off, len)) |
| 54 | + .build()); |
| 55 | + } |
| 56 | + |
| 57 | + /** |
| 58 | + * This method exists to satisfy the abstract OutputStream class. However, it's probably slow |
| 59 | + * and should be avoided. If writing byte-by-byte is required, consider buffering the stream. |
| 60 | + */ |
| 61 | + @Override |
| 62 | + public void write(int b) { |
| 63 | + stream.onNext( |
| 64 | + StreamingRecognizeRequest.newBuilder() |
| 65 | + .setAudioContent(ByteString.copyFrom(new byte[] {(byte) (b & 0xFF)})) |
| 66 | + .build()); |
| 67 | + } |
| 68 | + } |
| 69 | +} |
0 commit comments