2 * Copyright (c) 2010-2020 Contributors to the openHAB project
4 * See the NOTICE file(s) distributed with this work for additional
7 * This program and the accompanying materials are made available under the
8 * terms of the Eclipse Public License 2.0 which is available at
9 * http://www.eclipse.org/legal/epl-2.0
11 * SPDX-License-Identifier: EPL-2.0
13 package org.openhab.voice.picotts.internal;
16 import java.io.FileInputStream;
17 import java.io.FileNotFoundException;
18 import java.io.IOException;
19 import java.io.InputStream;
21 import org.openhab.core.audio.AudioException;
22 import org.openhab.core.audio.AudioFormat;
23 import org.openhab.core.audio.AudioStream;
24 import org.openhab.core.audio.FixedLengthAudioStream;
25 import org.openhab.core.voice.Voice;
28 * Implementation of {@link AudioStream} for {@link PicoTTSService}
30 * @author Florian Schmidt - Initial Contribution
32 class PicoTTSAudioStream extends FixedLengthAudioStream {
33 private final Voice voice;
34 private final String text;
35 private final AudioFormat audioFormat;
36 private final InputStream inputStream;
41 public PicoTTSAudioStream(String text, Voice voice, AudioFormat audioFormat) throws AudioException {
44 this.audioFormat = audioFormat;
45 this.inputStream = createInputStream();
49 public AudioFormat getFormat() {
53 private InputStream createInputStream() throws AudioException {
54 String outputFile = generateOutputFilename();
55 String[] command = getCommand(outputFile);
58 Process process = Runtime.getRuntime().exec(command);
60 file = new File(outputFile);
61 this.length = file.length();
62 return getFileInputStream(file);
63 } catch (IOException e) {
64 throw new AudioException("Error while executing '" + command + "'", e);
65 } catch (InterruptedException e) {
66 throw new AudioException("The '" + command + "' has been interrupted", e);
70 private InputStream getFileInputStream(File file) throws AudioException {
72 throw new IllegalArgumentException("file must not be null");
76 return new FileInputStream(file);
77 } catch (FileNotFoundException e) {
78 throw new AudioException("Cannot open temporary audio file '" + file.getName() + ".");
81 throw new AudioException("Temporary file '" + file.getName() + "' not found!");
86 * Generates a unique, absolute output filename
88 * @return Unique, absolute output filename
90 private String generateOutputFilename() throws AudioException {
92 File tempFile = File.createTempFile(Integer.toString(text.hashCode()), ".wav");
93 tempFile.deleteOnExit();
94 return tempFile.getAbsolutePath();
95 } catch (IOException e) {
96 throw new AudioException("Unable to create temp file.", e);
101 * Gets the command used to generate an audio file {@code outputFile}
103 * @param outputFile The absolute filename of the command's output
104 * @return The command used to generate the audio file {@code outputFile}
106 private String[] getCommand(String outputFile) {
107 return new String[] { "pico2wave", "-l=" + this.voice.getLabel(), "-w=" + outputFile, this.text };
111 public int read() throws IOException {
112 return inputStream.read();
116 public long length() {
121 public InputStream getClonedStream() throws AudioException {
123 return getFileInputStream(file);
125 throw new AudioException("No temporary audio file available.");