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[pulseaudio] Add pulseaudio sink as openhab audio sink (#1895)
This add to the pulseaudio binding the capability to use "pulseaudio sink" as an "openhab sink" to output sound from openhab to a pulse audio server on the network. You need to load module-simple-protocol-tcp sink in addition to the usual module-cli-protocol-tcp, and enable the sink in the thing configuration. Closes #1895 Signed-off-by: Gwendal Roulleau <[email protected]>
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188
...pulseaudio/src/main/java/org/openhab/binding/pulseaudio/internal/PulseAudioAudioSink.java
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| /** | ||
| * Copyright (c) 2010-2021 Contributors to the openHAB project | ||
| * | ||
| * See the NOTICE file(s) distributed with this work for additional | ||
| * information. | ||
| * | ||
| * This program and the accompanying materials are made available under the | ||
| * terms of the Eclipse Public License 2.0 which is available at | ||
| * http://www.eclipse.org/legal/epl-2.0 | ||
| * | ||
| * SPDX-License-Identifier: EPL-2.0 | ||
| */ | ||
| package org.openhab.binding.pulseaudio.internal; | ||
|
|
||
| import java.io.IOException; | ||
| import java.io.InputStream; | ||
| import java.net.Socket; | ||
| import java.net.UnknownHostException; | ||
| import java.util.HashSet; | ||
| import java.util.Locale; | ||
| import java.util.Set; | ||
| import javazoom.spi.mpeg.sampled.convert.MpegFormatConversionProvider; | ||
| import javazoom.spi.mpeg.sampled.file.MpegAudioFileReader; | ||
|
|
||
| import javax.sound.sampled.AudioInputStream; | ||
| import javax.sound.sampled.UnsupportedAudioFileException; | ||
|
|
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| import org.eclipse.jdt.annotation.Nullable; | ||
| import org.openhab.binding.pulseaudio.internal.handler.PulseaudioHandler; | ||
| import org.openhab.core.audio.AudioFormat; | ||
| import org.openhab.core.audio.AudioSink; | ||
| import org.openhab.core.audio.AudioStream; | ||
| import org.openhab.core.audio.FixedLengthAudioStream; | ||
| import org.openhab.core.audio.UnsupportedAudioFormatException; | ||
| import org.openhab.core.audio.UnsupportedAudioStreamException; | ||
| import org.openhab.core.library.types.PercentType; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
|
|
||
| /** | ||
| * The audio sink for openhab, implemented by a connection to a pulseaudio sink | ||
| * | ||
| * @author Gwendal Roulleau - Initial contribution | ||
| * | ||
| */ | ||
| public class PulseAudioAudioSink implements AudioSink { | ||
|
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| private final Logger logger = LoggerFactory.getLogger(PulseAudioAudioSink.class); | ||
|
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| private static final HashSet<AudioFormat> SUPPORTED_FORMATS = new HashSet<>(); | ||
| private static final HashSet<Class<? extends AudioStream>> SUPPORTED_STREAMS = new HashSet<>(); | ||
|
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| private PulseaudioHandler pulseaudioHandler; | ||
|
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| private Socket clientSocket; | ||
|
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| static { | ||
| SUPPORTED_FORMATS.add(AudioFormat.WAV); | ||
| SUPPORTED_FORMATS.add(AudioFormat.MP3); | ||
| SUPPORTED_STREAMS.add(FixedLengthAudioStream.class); | ||
| } | ||
|
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| public PulseAudioAudioSink(PulseaudioHandler pulseaudioHandler) { | ||
| this.pulseaudioHandler = pulseaudioHandler; | ||
| } | ||
|
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| @Override | ||
| public String getId() { | ||
| return pulseaudioHandler.getThing().getUID().toString(); | ||
| } | ||
|
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| @Override | ||
| public @Nullable String getLabel(@Nullable Locale locale) { | ||
| return pulseaudioHandler.getThing().getLabel(); | ||
| } | ||
|
|
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| /** | ||
| * Convert MP3 to PCM, as this is the only possible format | ||
| * | ||
| * @param input | ||
| * @return | ||
| */ | ||
| private InputStream getPCMStreamFromMp3Stream(InputStream input) { | ||
| try { | ||
| MpegAudioFileReader mpegAudioFileReader = new MpegAudioFileReader(); | ||
| AudioInputStream sourceAIS = mpegAudioFileReader.getAudioInputStream(input); | ||
| javax.sound.sampled.AudioFormat sourceFormat = sourceAIS.getFormat(); | ||
|
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| MpegFormatConversionProvider mpegconverter = new MpegFormatConversionProvider(); | ||
| javax.sound.sampled.AudioFormat convertFormat = new javax.sound.sampled.AudioFormat( | ||
| javax.sound.sampled.AudioFormat.Encoding.PCM_SIGNED, sourceFormat.getSampleRate(), 16, | ||
| sourceFormat.getChannels(), sourceFormat.getChannels() * 2, sourceFormat.getSampleRate(), false); | ||
|
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| return mpegconverter.getAudioInputStream(convertFormat, sourceAIS); | ||
|
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| } catch (IOException | UnsupportedAudioFileException e) { | ||
| logger.error("Cannot convert this mp3 stream to pcm stream", e); | ||
| } | ||
| return null; | ||
| } | ||
|
|
||
| /** | ||
| * Connect to pulseaudio with the simple protocol | ||
| * | ||
| * @throws UnknownHostException | ||
| * @throws IOException | ||
| */ | ||
| private void connectIfNeeded() throws IOException { | ||
| if (clientSocket == null || !clientSocket.isConnected() || clientSocket.isClosed()) { | ||
| String host = pulseaudioHandler.getHost(); | ||
| int port = pulseaudioHandler.getSimpleTcpPort(); | ||
| clientSocket = new Socket(host, port); | ||
| clientSocket.setSoTimeout(500); | ||
| } | ||
| } | ||
|
|
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| /** | ||
| * Disconnect the socket to pulseaudio simple protocol | ||
| */ | ||
| public void disconnect() { | ||
| if (clientSocket == null) { | ||
| try { | ||
| clientSocket.close(); | ||
| } catch (IOException e) { | ||
| } | ||
| } | ||
| } | ||
|
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| @Override | ||
| public void process(@Nullable AudioStream audioStream) | ||
| throws UnsupportedAudioFormatException, UnsupportedAudioStreamException { | ||
|
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| if (audioStream == null) { | ||
| return; | ||
| } | ||
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| InputStream audioInputStream = null; | ||
| try { | ||
|
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| if (AudioFormat.MP3.isCompatible(audioStream.getFormat())) { | ||
| audioInputStream = getPCMStreamFromMp3Stream(audioStream); | ||
| } else if (AudioFormat.WAV.isCompatible(audioStream.getFormat())) { | ||
| audioInputStream = audioStream; | ||
| } else { | ||
| throw new UnsupportedAudioFormatException("pulseaudio audio sink can only play pcm or mp3 stream", | ||
| audioStream.getFormat()); | ||
| } | ||
|
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| try { | ||
| connectIfNeeded(); | ||
| // send raw audio to the socket and to pulse audio | ||
| audioInputStream.transferTo(clientSocket.getOutputStream()); | ||
| } catch (IOException e) { | ||
| logger.error("Error while trying to send audio to pulseaudio audio sink. Cannot connect to {} : {}", | ||
| pulseaudioHandler.getHost(), pulseaudioHandler.getSimpleTcpPort()); | ||
| } | ||
| } finally { | ||
| try { | ||
| if (audioInputStream != null) { | ||
| audioInputStream.close(); | ||
| } | ||
| ; | ||
| audioStream.close(); | ||
| } catch (IOException e) { | ||
| } | ||
| } | ||
| } | ||
|
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| @Override | ||
| public Set<AudioFormat> getSupportedFormats() { | ||
| return SUPPORTED_FORMATS; | ||
| } | ||
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| @Override | ||
| public Set<Class<? extends AudioStream>> getSupportedStreams() { | ||
| return SUPPORTED_STREAMS; | ||
| } | ||
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| @Override | ||
| public PercentType getVolume() { | ||
| return new PercentType(pulseaudioHandler.getLastVolume()); | ||
| } | ||
|
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| @Override | ||
| public void setVolume(PercentType volume) { | ||
| pulseaudioHandler.setVolume(volume.intValue()); | ||
| } | ||
| } |
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