| /* |
| * Copyright (c) 1999, 2017, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package javax.sound.sampled; |
| |
| import java.io.EOFException; |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.net.URL; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Objects; |
| import java.util.Properties; |
| import java.util.Set; |
| import java.util.Vector; |
| |
| import javax.sound.sampled.spi.AudioFileReader; |
| import javax.sound.sampled.spi.AudioFileWriter; |
| import javax.sound.sampled.spi.FormatConversionProvider; |
| import javax.sound.sampled.spi.MixerProvider; |
| |
| import com.sun.media.sound.JDK13Services; |
| |
| /* $fb TODO: |
| * - consistent usage of (typed) collections |
| */ |
| |
| |
| /** |
| * The {@code AudioSystem} class acts as the entry point to the sampled-audio |
| * system resources. This class lets you query and access the mixers that are |
| * installed on the system. {@code AudioSystem} includes a number of methods for |
| * converting audio data between different formats, and for translating between |
| * audio files and streams. It also provides a method for obtaining a |
| * {@link Line} directly from the {@code AudioSystem} without dealing explicitly |
| * with mixers. |
| * <p> |
| * Properties can be used to specify the default mixer for specific line types. |
| * Both system properties and a properties file are considered. The |
| * "sound.properties" properties file is read from an implementation-specific |
| * location (typically it is the {@code conf} directory in the Java installation |
| * directory). If a property exists both as a system property and in the |
| * properties file, the system property takes precedence. If none is specified, |
| * a suitable default is chosen among the available devices. The syntax of the |
| * properties file is specified in |
| * {@link Properties#load(InputStream) Properties.load}. The following table |
| * lists the available property keys and which methods consider them: |
| * |
| * <table class="striped"> |
| * <caption>Audio System Property Keys</caption> |
| * <thead> |
| * <tr> |
| * <th>Property Key</th> |
| * <th>Interface</th> |
| * <th>Affected Method(s)</th> |
| * </tr> |
| * </thead> |
| * <tbody> |
| * <tr> |
| * <td>{@code javax.sound.sampled.Clip}</td> |
| * <td>{@link Clip}</td> |
| * <td>{@link #getLine}, {@link #getClip}</td> |
| * </tr> |
| * <tr> |
| * <td>{@code javax.sound.sampled.Port}</td> |
| * <td>{@link Port}</td> |
| * <td>{@link #getLine}</td> |
| * </tr> |
| * <tr> |
| * <td>{@code javax.sound.sampled.SourceDataLine}</td> |
| * <td>{@link SourceDataLine}</td> |
| * <td>{@link #getLine}, {@link #getSourceDataLine}</td> |
| * </tr> |
| * <tr> |
| * <td>{@code javax.sound.sampled.TargetDataLine}</td> |
| * <td>{@link TargetDataLine}</td> |
| * <td>{@link #getLine}, {@link #getTargetDataLine}</td> |
| * </tr> |
| * </tbody> |
| * </table> |
| * |
| * The property value consists of the provider class name and the mixer name, |
| * separated by the hash mark ("#"). The provider class name is the |
| * fully-qualified name of a concrete {@link MixerProvider mixer provider} |
| * class. The mixer name is matched against the {@code String} returned by the |
| * {@code getName} method of {@code Mixer.Info}. Either the class name, or the |
| * mixer name may be omitted. If only the class name is specified, the trailing |
| * hash mark is optional. |
| * <p> |
| * If the provider class is specified, and it can be successfully retrieved from |
| * the installed providers, the list of {@code Mixer.Info} objects is retrieved |
| * from the provider. Otherwise, or when these mixers do not provide a |
| * subsequent match, the list is retrieved from {@link #getMixerInfo} to contain |
| * all available {@code Mixer.Info} objects. |
| * <p> |
| * If a mixer name is specified, the resulting list of {@code Mixer.Info} |
| * objects is searched: the first one with a matching name, and whose |
| * {@code Mixer} provides the respective line interface, will be returned. If no |
| * matching {@code Mixer.Info} object is found, or the mixer name is not |
| * specified, the first mixer from the resulting list, which provides the |
| * respective line interface, will be returned. |
| * |
| * For example, the property {@code javax.sound.sampled.Clip} with a value |
| * {@code "com.sun.media.sound.MixerProvider#SunClip"} |
| * will have the following consequences when {@code getLine} is called |
| * requesting a {@code Clip} instance: if the class |
| * {@code com.sun.media.sound.MixerProvider} exists in the list of installed |
| * mixer providers, the first {@code Clip} from the first mixer with name |
| * {@code "SunClip"} will be returned. If it cannot be found, the |
| * first {@code Clip} from the first mixer of the specified provider will be |
| * returned, regardless of name. If there is none, the first {@code Clip} from |
| * the first {@code Mixer} with name {@code "SunClip"} in the list of |
| * all mixers (as returned by {@code getMixerInfo}) will be returned, or, if not |
| * found, the first {@code Clip} of the first {@code Mixer} that can be found in |
| * the list of all mixers is returned. If that fails, too, an |
| * {@code IllegalArgumentException} is thrown. |
| * |
| * @author Kara Kytle |
| * @author Florian Bomers |
| * @author Matthias Pfisterer |
| * @author Kevin P. Smith |
| * @see AudioFormat |
| * @see AudioInputStream |
| * @see Mixer |
| * @see Line |
| * @see Line.Info |
| * @since 1.3 |
| */ |
| public class AudioSystem { |
| |
| /** |
| * An integer that stands for an unknown numeric value. This value is |
| * appropriate only for signed quantities that do not normally take negative |
| * values. Examples include file sizes, frame sizes, buffer sizes, and |
| * sample rates. A number of Java Sound constructors accept a value of |
| * {@code NOT_SPECIFIED} for such parameters. Other methods may also accept |
| * or return this value, as documented. |
| */ |
| public static final int NOT_SPECIFIED = -1; |
| |
| /** |
| * Private no-args constructor for ensuring against instantiation. |
| */ |
| private AudioSystem() { |
| } |
| |
| /** |
| * Obtains an array of mixer info objects that represents the set of audio |
| * mixers that are currently installed on the system. |
| * |
| * @return an array of info objects for the currently installed mixers. If |
| * no mixers are available on the system, an array of length 0 is |
| * returned. |
| * @see #getMixer |
| */ |
| public static Mixer.Info[] getMixerInfo() { |
| |
| List<Mixer.Info> infos = getMixerInfoList(); |
| Mixer.Info[] allInfos = infos.toArray(new Mixer.Info[infos.size()]); |
| return allInfos; |
| } |
| |
| /** |
| * Obtains the requested audio mixer. |
| * |
| * @param info a {@code Mixer.Info} object representing the desired mixer, |
| * or {@code null} for the system default mixer |
| * @return the requested mixer |
| * @throws SecurityException if the requested mixer is unavailable because |
| * of security restrictions |
| * @throws IllegalArgumentException if the info object does not represent a |
| * mixer installed on the system |
| * @see #getMixerInfo |
| */ |
| public static Mixer getMixer(final Mixer.Info info) { |
| for (final MixerProvider provider : getMixerProviders()) { |
| try { |
| return provider.getMixer(info); |
| } catch (IllegalArgumentException | NullPointerException ignored) { |
| // The MixerProvider.getMixer(null) should return default Mixer, |
| // This behaviour was assumed from the beginning, but strictly |
| // specified only in the jdk9. Since the jdk1.1.5 we skipped |
| // NPE for some reason and therefore skipped some |
| // implementations of MixerProviders, which throw NPE. To keep |
| // support of such implementations, we still ignore NPE. |
| } |
| } |
| throw new IllegalArgumentException( |
| String.format("Mixer not supported: %s", info)); |
| } |
| |
| //$$fb 2002-11-26: fix for 4757930: DOC: AudioSystem.getTarget/SourceLineInfo() is ambiguous |
| |
| /** |
| * Obtains information about all source lines of a particular type that are |
| * supported by the installed mixers. |
| * |
| * @param info a {@code Line.Info} object that specifies the kind of lines |
| * about which information is requested |
| * @return an array of {@code Line.Info} objects describing source lines |
| * matching the type requested. If no matching source lines are |
| * supported, an array of length 0 is returned. |
| * @see Mixer#getSourceLineInfo(Line.Info) |
| */ |
| public static Line.Info[] getSourceLineInfo(Line.Info info) { |
| |
| Vector<Line.Info> vector = new Vector<>(); |
| Line.Info[] currentInfoArray; |
| |
| Mixer mixer; |
| Line.Info fullInfo = null; |
| Mixer.Info[] infoArray = getMixerInfo(); |
| |
| for (int i = 0; i < infoArray.length; i++) { |
| |
| mixer = getMixer(infoArray[i]); |
| |
| currentInfoArray = mixer.getSourceLineInfo(info); |
| for (int j = 0; j < currentInfoArray.length; j++) { |
| vector.addElement(currentInfoArray[j]); |
| } |
| } |
| |
| Line.Info[] returnedArray = new Line.Info[vector.size()]; |
| |
| for (int i = 0; i < returnedArray.length; i++) { |
| returnedArray[i] = vector.get(i); |
| } |
| |
| return returnedArray; |
| } |
| |
| /** |
| * Obtains information about all target lines of a particular type that are |
| * supported by the installed mixers. |
| * |
| * @param info a {@code Line.Info} object that specifies the kind of lines |
| * about which information is requested |
| * @return an array of {@code Line.Info} objects describing target lines |
| * matching the type requested. If no matching target lines are |
| * supported, an array of length 0 is returned. |
| * @see Mixer#getTargetLineInfo(Line.Info) |
| */ |
| public static Line.Info[] getTargetLineInfo(Line.Info info) { |
| |
| Vector<Line.Info> vector = new Vector<>(); |
| Line.Info[] currentInfoArray; |
| |
| Mixer mixer; |
| Line.Info fullInfo = null; |
| Mixer.Info[] infoArray = getMixerInfo(); |
| |
| for (int i = 0; i < infoArray.length; i++) { |
| |
| mixer = getMixer(infoArray[i]); |
| |
| currentInfoArray = mixer.getTargetLineInfo(info); |
| for (int j = 0; j < currentInfoArray.length; j++) { |
| vector.addElement(currentInfoArray[j]); |
| } |
| } |
| |
| Line.Info[] returnedArray = new Line.Info[vector.size()]; |
| |
| for (int i = 0; i < returnedArray.length; i++) { |
| returnedArray[i] = vector.get(i); |
| } |
| |
| return returnedArray; |
| } |
| |
| /** |
| * Indicates whether the system supports any lines that match the specified |
| * {@code Line.Info} object. A line is supported if any installed mixer |
| * supports it. |
| * |
| * @param info a {@code Line.Info} object describing the line for which |
| * support is queried |
| * @return {@code true} if at least one matching line is supported, |
| * otherwise {@code false} |
| * @see Mixer#isLineSupported(Line.Info) |
| */ |
| public static boolean isLineSupported(Line.Info info) { |
| |
| Mixer mixer; |
| Mixer.Info[] infoArray = getMixerInfo(); |
| |
| for (int i = 0; i < infoArray.length; i++) { |
| |
| if( infoArray[i] != null ) { |
| mixer = getMixer(infoArray[i]); |
| if (mixer.isLineSupported(info)) { |
| return true; |
| } |
| } |
| } |
| |
| return false; |
| } |
| |
| /** |
| * Obtains a line that matches the description in the specified |
| * {@code Line.Info} object. |
| * <p> |
| * If a {@code DataLine} is requested, and {@code info} is an instance of |
| * {@code DataLine.Info} specifying at least one fully qualified audio |
| * format, the last one will be used as the default format of the returned |
| * {@code DataLine}. |
| * <p> |
| * If system properties |
| * {@code javax.sound.sampled.Clip}, |
| * {@code javax.sound.sampled.Port}, |
| * {@code javax.sound.sampled.SourceDataLine} and |
| * {@code javax.sound.sampled.TargetDataLine} are defined or they are |
| * defined in the file "sound.properties", they are used to retrieve default |
| * lines. For details, refer to the {@link AudioSystem class description}. |
| * |
| * If the respective property is not set, or the mixer requested in the |
| * property is not installed or does not provide the requested line, all |
| * installed mixers are queried for the requested line type. A Line will be |
| * returned from the first mixer providing the requested line type. |
| * |
| * @param info a {@code Line.Info} object describing the desired kind of |
| * line |
| * @return a line of the requested kind |
| * @throws LineUnavailableException if a matching line is not available due |
| * to resource restrictions |
| * @throws SecurityException if a matching line is not available due to |
| * security restrictions |
| * @throws IllegalArgumentException if the system does not support at least |
| * one line matching the specified {@code Line.Info} object through |
| * any installed mixer |
| */ |
| public static Line getLine(Line.Info info) throws LineUnavailableException { |
| LineUnavailableException lue = null; |
| List<MixerProvider> providers = getMixerProviders(); |
| |
| |
| // 1: try from default mixer for this line class |
| try { |
| Mixer mixer = getDefaultMixer(providers, info); |
| if (mixer != null && mixer.isLineSupported(info)) { |
| return mixer.getLine(info); |
| } |
| } catch (LineUnavailableException e) { |
| lue = e; |
| } catch (IllegalArgumentException iae) { |
| // must not happen... but better to catch it here, |
| // if plug-ins are badly written |
| } |
| |
| |
| // 2: if that doesn't work, try to find any mixing mixer |
| for(int i = 0; i < providers.size(); i++) { |
| MixerProvider provider = providers.get(i); |
| Mixer.Info[] infos = provider.getMixerInfo(); |
| |
| for (int j = 0; j < infos.length; j++) { |
| try { |
| Mixer mixer = provider.getMixer(infos[j]); |
| // see if this is an appropriate mixer which can mix |
| if (isAppropriateMixer(mixer, info, true)) { |
| return mixer.getLine(info); |
| } |
| } catch (LineUnavailableException e) { |
| lue = e; |
| } catch (IllegalArgumentException iae) { |
| // must not happen... but better to catch it here, |
| // if plug-ins are badly written |
| } |
| } |
| } |
| |
| |
| // 3: if that didn't work, try to find any non-mixing mixer |
| for(int i = 0; i < providers.size(); i++) { |
| MixerProvider provider = providers.get(i); |
| Mixer.Info[] infos = provider.getMixerInfo(); |
| for (int j = 0; j < infos.length; j++) { |
| try { |
| Mixer mixer = provider.getMixer(infos[j]); |
| // see if this is an appropriate mixer which can mix |
| if (isAppropriateMixer(mixer, info, false)) { |
| return mixer.getLine(info); |
| } |
| } catch (LineUnavailableException e) { |
| lue = e; |
| } catch (IllegalArgumentException iae) { |
| // must not happen... but better to catch it here, |
| // if plug-ins are badly written |
| } |
| } |
| } |
| |
| // if this line was supported but was not available, throw the last |
| // LineUnavailableException we got (??). |
| if (lue != null) { |
| throw lue; |
| } |
| |
| // otherwise, the requested line was not supported, so throw |
| // an Illegal argument exception |
| throw new IllegalArgumentException("No line matching " + |
| info.toString() + " is supported."); |
| } |
| |
| /** |
| * Obtains a clip that can be used for playing back an audio file or an |
| * audio stream. The returned clip will be provided by the default system |
| * mixer, or, if not possible, by any other mixer installed in the system |
| * that supports a {@code Clip} object. |
| * <p> |
| * The returned clip must be opened with the {@code open(AudioFormat)} or |
| * {@code open(AudioInputStream)} method. |
| * <p> |
| * This is a high-level method that uses {@code getMixer} and |
| * {@code getLine} internally. |
| * <p> |
| * If the system property {@code javax.sound.sampled.Clip} is defined or it |
| * is defined in the file "sound.properties", it is used to retrieve the |
| * default clip. For details, refer to the |
| * {@link AudioSystem class description}. |
| * |
| * @return the desired clip object |
| * @throws LineUnavailableException if a clip object is not available due to |
| * resource restrictions |
| * @throws SecurityException if a clip object is not available due to |
| * security restrictions |
| * @throws IllegalArgumentException if the system does not support at least |
| * one clip instance through any installed mixer |
| * @see #getClip(Mixer.Info) |
| * @since 1.5 |
| */ |
| public static Clip getClip() throws LineUnavailableException{ |
| AudioFormat format = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, |
| AudioSystem.NOT_SPECIFIED, |
| 16, 2, 4, |
| AudioSystem.NOT_SPECIFIED, true); |
| DataLine.Info info = new DataLine.Info(Clip.class, format); |
| return (Clip) AudioSystem.getLine(info); |
| } |
| |
| /** |
| * Obtains a clip from the specified mixer that can be used for playing back |
| * an audio file or an audio stream. |
| * <p> |
| * The returned clip must be opened with the {@code open(AudioFormat)} or |
| * {@code open(AudioInputStream)} method. |
| * <p> |
| * This is a high-level method that uses {@code getMixer} and |
| * {@code getLine} internally. |
| * |
| * @param mixerInfo a {@code Mixer.Info} object representing the desired |
| * mixer, or {@code null} for the system default mixer |
| * @return a clip object from the specified mixer |
| * |
| * @throws LineUnavailableException if a clip is not available from this |
| * mixer due to resource restrictions |
| * @throws SecurityException if a clip is not available from this mixer due |
| * to security restrictions |
| * @throws IllegalArgumentException if the system does not support at least |
| * one clip through the specified mixer |
| * @see #getClip() |
| * @since 1.5 |
| */ |
| public static Clip getClip(Mixer.Info mixerInfo) throws LineUnavailableException{ |
| AudioFormat format = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, |
| AudioSystem.NOT_SPECIFIED, |
| 16, 2, 4, |
| AudioSystem.NOT_SPECIFIED, true); |
| DataLine.Info info = new DataLine.Info(Clip.class, format); |
| Mixer mixer = AudioSystem.getMixer(mixerInfo); |
| return (Clip) mixer.getLine(info); |
| } |
| |
| /** |
| * Obtains a source data line that can be used for playing back audio data |
| * in the format specified by the {@code AudioFormat} object. The returned |
| * line will be provided by the default system mixer, or, if not possible, |
| * by any other mixer installed in the system that supports a matching |
| * {@code SourceDataLine} object. |
| * <p> |
| * The returned line should be opened with the {@code open(AudioFormat)} or |
| * {@code open(AudioFormat, int)} method. |
| * <p> |
| * This is a high-level method that uses {@code getMixer} and |
| * {@code getLine} internally. |
| * <p> |
| * The returned {@code SourceDataLine}'s default audio format will be |
| * initialized with {@code format}. |
| * <p> |
| * If the system property {@code javax.sound.sampled.SourceDataLine} is |
| * defined or it is defined in the file "sound.properties", it is used to |
| * retrieve the default source data line. For details, refer to the |
| * {@link AudioSystem class description}. |
| * |
| * @param format an {@code AudioFormat} object specifying the supported |
| * audio format of the returned line, or {@code null} for any audio |
| * format |
| * @return the desired {@code SourceDataLine} object |
| * @throws LineUnavailableException if a matching source data line is not |
| * available due to resource restrictions |
| * @throws SecurityException if a matching source data line is not available |
| * due to security restrictions |
| * @throws IllegalArgumentException if the system does not support at least |
| * one source data line supporting the specified audio format |
| * through any installed mixer |
| * @see #getSourceDataLine(AudioFormat, Mixer.Info) |
| * @since 1.5 |
| */ |
| public static SourceDataLine getSourceDataLine(AudioFormat format) |
| throws LineUnavailableException{ |
| DataLine.Info info = new DataLine.Info(SourceDataLine.class, format); |
| return (SourceDataLine) AudioSystem.getLine(info); |
| } |
| |
| /** |
| * Obtains a source data line that can be used for playing back audio data |
| * in the format specified by the {@code AudioFormat} object, provided by |
| * the mixer specified by the {@code Mixer.Info} object. |
| * <p> |
| * The returned line should be opened with the {@code open(AudioFormat)} or |
| * {@code open(AudioFormat, int)} method. |
| * <p> |
| * This is a high-level method that uses {@code getMixer} and |
| * {@code getLine} internally. |
| * <p> |
| * The returned {@code SourceDataLine}'s default audio format will be |
| * initialized with {@code format}. |
| * |
| * @param format an {@code AudioFormat} object specifying the supported |
| * audio format of the returned line, or {@code null} for any audio |
| * format |
| * @param mixerinfo a {@code Mixer.Info} object representing the desired |
| * mixer, or {@code null} for the system default mixer |
| * @return the desired {@code SourceDataLine} object |
| * @throws LineUnavailableException if a matching source data line is not |
| * available from the specified mixer due to resource restrictions |
| * @throws SecurityException if a matching source data line is not available |
| * from the specified mixer due to security restrictions |
| * @throws IllegalArgumentException if the specified mixer does not support |
| * at least one source data line supporting the specified audio |
| * format |
| * @see #getSourceDataLine(AudioFormat) |
| * @since 1.5 |
| */ |
| public static SourceDataLine getSourceDataLine(AudioFormat format, |
| Mixer.Info mixerinfo) |
| throws LineUnavailableException{ |
| DataLine.Info info = new DataLine.Info(SourceDataLine.class, format); |
| Mixer mixer = AudioSystem.getMixer(mixerinfo); |
| return (SourceDataLine) mixer.getLine(info); |
| } |
| |
| /** |
| * Obtains a target data line that can be used for recording audio data in |
| * the format specified by the {@code AudioFormat} object. The returned line |
| * will be provided by the default system mixer, or, if not possible, by any |
| * other mixer installed in the system that supports a matching |
| * {@code TargetDataLine} object. |
| * <p> |
| * The returned line should be opened with the {@code open(AudioFormat)} or |
| * {@code open(AudioFormat, int)} method. |
| * <p> |
| * This is a high-level method that uses {@code getMixer} and |
| * {@code getLine} internally. |
| * <p> |
| * The returned {@code TargetDataLine}'s default audio format will be |
| * initialized with {@code format}. |
| * <p> |
| * If the system property {@code javax.sound.sampled.TargetDataLine} is |
| * defined or it is defined in the file "sound.properties", it is used to |
| * retrieve the default target data line. For details, refer to the |
| * {@link AudioSystem class description}. |
| * |
| * @param format an {@code AudioFormat} object specifying the supported |
| * audio format of the returned line, or {@code null} for any audio |
| * format |
| * @return the desired {@code TargetDataLine} object |
| * @throws LineUnavailableException if a matching target data line is not |
| * available due to resource restrictions |
| * @throws SecurityException if a matching target data line is not available |
| * due to security restrictions |
| * @throws IllegalArgumentException if the system does not support at least |
| * one target data line supporting the specified audio format |
| * through any installed mixer |
| * @see #getTargetDataLine(AudioFormat, Mixer.Info) |
| * @see AudioPermission |
| * @since 1.5 |
| */ |
| public static TargetDataLine getTargetDataLine(AudioFormat format) |
| throws LineUnavailableException{ |
| |
| DataLine.Info info = new DataLine.Info(TargetDataLine.class, format); |
| return (TargetDataLine) AudioSystem.getLine(info); |
| } |
| |
| /** |
| * Obtains a target data line that can be used for recording audio data in |
| * the format specified by the {@code AudioFormat} object, provided by the |
| * mixer specified by the {@code Mixer.Info} object. |
| * <p> |
| * The returned line should be opened with the {@code open(AudioFormat)} or |
| * {@code open(AudioFormat, int)} method. |
| * <p> |
| * This is a high-level method that uses {@code getMixer} and |
| * {@code getLine} internally. |
| * <p> |
| * The returned {@code TargetDataLine}'s default audio format will be |
| * initialized with {@code format}. |
| * |
| * @param format an {@code AudioFormat} object specifying the supported |
| * audio format of the returned line, or {@code null} for any audio |
| * format |
| * @param mixerinfo a {@code Mixer.Info} object representing the desired |
| * mixer, or {@code null} for the system default mixer |
| * @return the desired {@code TargetDataLine} object |
| * @throws LineUnavailableException if a matching target data line is not |
| * available from the specified mixer due to resource restrictions |
| * @throws SecurityException if a matching target data line is not available |
| * from the specified mixer due to security restrictions |
| * @throws IllegalArgumentException if the specified mixer does not support |
| * at least one target data line supporting the specified audio |
| * format |
| * @see #getTargetDataLine(AudioFormat) |
| * @see AudioPermission |
| * @since 1.5 |
| */ |
| public static TargetDataLine getTargetDataLine(AudioFormat format, |
| Mixer.Info mixerinfo) |
| throws LineUnavailableException { |
| |
| DataLine.Info info = new DataLine.Info(TargetDataLine.class, format); |
| Mixer mixer = AudioSystem.getMixer(mixerinfo); |
| return (TargetDataLine) mixer.getLine(info); |
| } |
| |
| // $$fb 2002-04-12: fix for 4662082: behavior of AudioSystem.getTargetEncodings() methods doesn't match the spec |
| |
| /** |
| * Obtains the encodings that the system can obtain from an audio input |
| * stream with the specified encoding using the set of installed format |
| * converters. |
| * |
| * @param sourceEncoding the encoding for which conversion support is |
| * queried |
| * @return array of encodings. If {@code sourceEncoding}is not supported, an |
| * array of length 0 is returned. Otherwise, the array will have a |
| * length of at least 1, representing {@code sourceEncoding} |
| * (no conversion). |
| * @throws NullPointerException if {@code sourceEncoding} is {@code null} |
| */ |
| public static AudioFormat.Encoding[] getTargetEncodings(AudioFormat.Encoding sourceEncoding) { |
| Objects.requireNonNull(sourceEncoding); |
| |
| List<FormatConversionProvider> codecs = getFormatConversionProviders(); |
| Vector<AudioFormat.Encoding> encodings = new Vector<>(); |
| |
| AudioFormat.Encoding encs[] = null; |
| |
| // gather from all the codecs |
| for(int i=0; i<codecs.size(); i++ ) { |
| FormatConversionProvider codec = codecs.get(i); |
| if( codec.isSourceEncodingSupported( sourceEncoding ) ) { |
| encs = codec.getTargetEncodings(); |
| for (int j = 0; j < encs.length; j++) { |
| encodings.addElement( encs[j] ); |
| } |
| } |
| } |
| if (!encodings.contains(sourceEncoding)) { |
| encodings.addElement(sourceEncoding); |
| } |
| |
| return encodings.toArray(new AudioFormat.Encoding[encodings.size()]); |
| } |
| |
| // $$fb 2002-04-12: fix for 4662082: behavior of AudioSystem.getTargetEncodings() methods doesn't match the spec |
| |
| /** |
| * Obtains the encodings that the system can obtain from an audio input |
| * stream with the specified format using the set of installed format |
| * converters. |
| * |
| * @param sourceFormat the audio format for which conversion is queried |
| * @return array of encodings. If {@code sourceFormat}is not supported, an |
| * array of length 0 is returned. Otherwise, the array will have a |
| * length of at least 1, representing the encoding of |
| * {@code sourceFormat} (no conversion). |
| * @throws NullPointerException if {@code sourceFormat} is {@code null} |
| */ |
| public static AudioFormat.Encoding[] getTargetEncodings(AudioFormat sourceFormat) { |
| Objects.requireNonNull(sourceFormat); |
| |
| List<FormatConversionProvider> codecs = getFormatConversionProviders(); |
| List<AudioFormat.Encoding> encs = new ArrayList<>(); |
| |
| // gather from all the codecs |
| for (final FormatConversionProvider codec : codecs) { |
| Collections.addAll(encs, codec.getTargetEncodings(sourceFormat)); |
| } |
| |
| if (!encs.contains(sourceFormat.getEncoding())) { |
| encs.add(sourceFormat.getEncoding()); |
| } |
| |
| return encs.toArray(new AudioFormat.Encoding[encs.size()]); |
| } |
| |
| /** |
| * Indicates whether an audio input stream of the specified encoding can be |
| * obtained from an audio input stream that has the specified format. |
| * |
| * @param targetEncoding the desired encoding after conversion |
| * @param sourceFormat the audio format before conversion |
| * @return {@code true} if the conversion is supported, otherwise |
| * {@code false} |
| * @throws NullPointerException if {@code targetEncoding} or |
| * {@code sourceFormat} are {@code null} |
| */ |
| public static boolean isConversionSupported(AudioFormat.Encoding targetEncoding, AudioFormat sourceFormat) { |
| Objects.requireNonNull(targetEncoding); |
| Objects.requireNonNull(sourceFormat); |
| if (sourceFormat.getEncoding().equals(targetEncoding)) { |
| return true; |
| } |
| |
| List<FormatConversionProvider> codecs = getFormatConversionProviders(); |
| |
| for(int i=0; i<codecs.size(); i++ ) { |
| FormatConversionProvider codec = codecs.get(i); |
| if(codec.isConversionSupported(targetEncoding,sourceFormat) ) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Obtains an audio input stream of the indicated encoding, by converting |
| * the provided audio input stream. |
| * |
| * @param targetEncoding the desired encoding after conversion |
| * @param sourceStream the stream to be converted |
| * @return an audio input stream of the indicated encoding |
| * @throws IllegalArgumentException if the conversion is not supported |
| * @throws NullPointerException if {@code targetEncoding} or |
| * {@code sourceStream} are {@code null} |
| * @see #getTargetEncodings(AudioFormat.Encoding) |
| * @see #getTargetEncodings(AudioFormat) |
| * @see #isConversionSupported(AudioFormat.Encoding, AudioFormat) |
| * @see #getAudioInputStream(AudioFormat, AudioInputStream) |
| */ |
| public static AudioInputStream getAudioInputStream(AudioFormat.Encoding targetEncoding, |
| AudioInputStream sourceStream) { |
| Objects.requireNonNull(targetEncoding); |
| Objects.requireNonNull(sourceStream); |
| if (sourceStream.getFormat().getEncoding().equals(targetEncoding)) { |
| return sourceStream; |
| } |
| |
| List<FormatConversionProvider> codecs = getFormatConversionProviders(); |
| |
| for(int i = 0; i < codecs.size(); i++) { |
| FormatConversionProvider codec = codecs.get(i); |
| if( codec.isConversionSupported( targetEncoding, sourceStream.getFormat() ) ) { |
| return codec.getAudioInputStream( targetEncoding, sourceStream ); |
| } |
| } |
| // we ran out of options, throw an exception |
| throw new IllegalArgumentException("Unsupported conversion: " + targetEncoding + " from " + sourceStream.getFormat()); |
| } |
| |
| /** |
| * Obtains the formats that have a particular encoding and that the system |
| * can obtain from a stream of the specified format using the set of |
| * installed format converters. |
| * |
| * @param targetEncoding the desired encoding after conversion |
| * @param sourceFormat the audio format before conversion |
| * @return array of formats. If no formats of the specified encoding are |
| * supported, an array of length 0 is returned. |
| * @throws NullPointerException if {@code targetEncoding} or |
| * {@code sourceFormat} are {@code null} |
| */ |
| public static AudioFormat[] getTargetFormats(AudioFormat.Encoding targetEncoding, AudioFormat sourceFormat) { |
| Objects.requireNonNull(targetEncoding); |
| Objects.requireNonNull(sourceFormat); |
| |
| List<FormatConversionProvider> codecs = getFormatConversionProviders(); |
| List<AudioFormat> formats = new ArrayList<>(); |
| |
| boolean matchFound = false; |
| // gather from all the codecs |
| for (final FormatConversionProvider codec : codecs) { |
| AudioFormat[] elements = codec |
| .getTargetFormats(targetEncoding, sourceFormat); |
| for (AudioFormat format : elements) { |
| formats.add(format); |
| if (sourceFormat.matches(format)) { |
| matchFound = true; |
| } |
| } |
| } |
| |
| if (targetEncoding.equals(sourceFormat.getEncoding())) { |
| if (!matchFound) { |
| formats.add(sourceFormat); |
| } |
| } |
| return formats.toArray(new AudioFormat[formats.size()]); |
| } |
| |
| /** |
| * Indicates whether an audio input stream of a specified format can be |
| * obtained from an audio input stream of another specified format. |
| * |
| * @param targetFormat the desired audio format after conversion |
| * @param sourceFormat the audio format before conversion |
| * @return {@code true} if the conversion is supported, otherwise |
| * {@code false} |
| * @throws NullPointerException if {@code targetFormat} or |
| * {@code sourceFormat} are {@code null} |
| */ |
| public static boolean isConversionSupported(AudioFormat targetFormat, AudioFormat sourceFormat) { |
| Objects.requireNonNull(targetFormat); |
| Objects.requireNonNull(sourceFormat); |
| if (sourceFormat.matches(targetFormat)) { |
| return true; |
| } |
| |
| List<FormatConversionProvider> codecs = getFormatConversionProviders(); |
| |
| for(int i=0; i<codecs.size(); i++ ) { |
| FormatConversionProvider codec = codecs.get(i); |
| if(codec.isConversionSupported(targetFormat, sourceFormat) ) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Obtains an audio input stream of the indicated format, by converting the |
| * provided audio input stream. |
| * |
| * @param targetFormat the desired audio format after conversion |
| * @param sourceStream the stream to be converted |
| * @return an audio input stream of the indicated format |
| * @throws IllegalArgumentException if the conversion is not supported |
| * @throws NullPointerException if {@code targetFormat} or |
| * {@code sourceStream} are {@code null} |
| * @see #getTargetEncodings(AudioFormat) |
| * @see #getTargetFormats(AudioFormat.Encoding, AudioFormat) |
| * @see #isConversionSupported(AudioFormat, AudioFormat) |
| * @see #getAudioInputStream(AudioFormat.Encoding, AudioInputStream) |
| */ |
| public static AudioInputStream getAudioInputStream(AudioFormat targetFormat, |
| AudioInputStream sourceStream) { |
| if (sourceStream.getFormat().matches(targetFormat)) { |
| return sourceStream; |
| } |
| |
| List<FormatConversionProvider> codecs = getFormatConversionProviders(); |
| |
| for(int i = 0; i < codecs.size(); i++) { |
| FormatConversionProvider codec = codecs.get(i); |
| if(codec.isConversionSupported(targetFormat,sourceStream.getFormat()) ) { |
| return codec.getAudioInputStream(targetFormat,sourceStream); |
| } |
| } |
| |
| // we ran out of options... |
| throw new IllegalArgumentException("Unsupported conversion: " + targetFormat + " from " + sourceStream.getFormat()); |
| } |
| |
| /** |
| * Obtains the audio file format of the provided input stream. The stream |
| * must point to valid audio file data. The implementation of this method |
| * may require multiple parsers to examine the stream to determine whether |
| * they support it. These parsers must be able to mark the stream, read |
| * enough data to determine whether they support the stream, and reset the |
| * stream's read pointer to its original position. If the input stream does |
| * not support these operations, this method may fail with an |
| * {@code IOException}. |
| * |
| * @param stream the input stream from which file format information should |
| * be extracted |
| * @return an {@code AudioFileFormat} object describing the stream's audio |
| * file format |
| * @throws UnsupportedAudioFileException if the stream does not point to |
| * valid audio file data recognized by the system |
| * @throws IOException if an input/output exception occurs |
| * @throws NullPointerException if {@code stream} is {@code null} |
| * @see InputStream#markSupported |
| * @see InputStream#mark |
| */ |
| public static AudioFileFormat getAudioFileFormat(final InputStream stream) |
| throws UnsupportedAudioFileException, IOException { |
| Objects.requireNonNull(stream); |
| |
| for (final AudioFileReader reader : getAudioFileReaders()) { |
| try { |
| return reader.getAudioFileFormat(stream); |
| } catch (final UnsupportedAudioFileException ignored) { |
| } |
| } |
| throw new UnsupportedAudioFileException("Stream of unsupported format"); |
| } |
| |
| /** |
| * Obtains the audio file format of the specified URL. The URL must point to |
| * valid audio file data. |
| * |
| * @param url the URL from which file format information should be |
| * extracted |
| * @return an {@code AudioFileFormat} object describing the audio file |
| * format |
| * @throws UnsupportedAudioFileException if the URL does not point to valid |
| * audio file data recognized by the system |
| * @throws IOException if an input/output exception occurs |
| * @throws NullPointerException if {@code url} is {@code null} |
| */ |
| public static AudioFileFormat getAudioFileFormat(final URL url) |
| throws UnsupportedAudioFileException, IOException { |
| Objects.requireNonNull(url); |
| |
| for (final AudioFileReader reader : getAudioFileReaders()) { |
| try { |
| return reader.getAudioFileFormat(url); |
| } catch (final UnsupportedAudioFileException ignored) { |
| } |
| } |
| throw new UnsupportedAudioFileException("URL of unsupported format"); |
| } |
| |
| /** |
| * Obtains the audio file format of the specified {@code File}. The |
| * {@code File} must point to valid audio file data. |
| * |
| * @param file the {@code File} from which file format information should |
| * be extracted |
| * @return an {@code AudioFileFormat} object describing the audio file |
| * format |
| * @throws UnsupportedAudioFileException if the {@code File} does not point |
| * to valid audio file data recognized by the system |
| * @throws IOException if an I/O exception occurs |
| * @throws NullPointerException if {@code file} is {@code null} |
| */ |
| public static AudioFileFormat getAudioFileFormat(final File file) |
| throws UnsupportedAudioFileException, IOException { |
| Objects.requireNonNull(file); |
| |
| for (final AudioFileReader reader : getAudioFileReaders()) { |
| try { |
| return reader.getAudioFileFormat(file); |
| } catch (final UnsupportedAudioFileException ignored) { |
| } |
| } |
| throw new UnsupportedAudioFileException("File of unsupported format"); |
| } |
| |
| /** |
| * Obtains an audio input stream from the provided input stream. The stream |
| * must point to valid audio file data. The implementation of this method |
| * may require multiple parsers to examine the stream to determine whether |
| * they support it. These parsers must be able to mark the stream, read |
| * enough data to determine whether they support the stream, and reset the |
| * stream's read pointer to its original position. If the input stream does |
| * not support these operation, this method may fail with an |
| * {@code IOException}. |
| * |
| * @param stream the input stream from which the {@code AudioInputStream} |
| * should be constructed |
| * @return an {@code AudioInputStream} object based on the audio file data |
| * contained in the input stream |
| * @throws UnsupportedAudioFileException if the stream does not point to |
| * valid audio file data recognized by the system |
| * @throws IOException if an I/O exception occurs |
| * @throws NullPointerException if {@code stream} is {@code null} |
| * @see InputStream#markSupported |
| * @see InputStream#mark |
| */ |
| public static AudioInputStream getAudioInputStream(final InputStream stream) |
| throws UnsupportedAudioFileException, IOException { |
| Objects.requireNonNull(stream); |
| |
| for (final AudioFileReader reader : getAudioFileReaders()) { |
| try { |
| return reader.getAudioInputStream(stream); |
| } catch (final UnsupportedAudioFileException ignored) { |
| } |
| } |
| throw new UnsupportedAudioFileException("Stream of unsupported format"); |
| } |
| |
| /** |
| * Obtains an audio input stream from the URL provided. The URL must point |
| * to valid audio file data. |
| * |
| * @param url the URL for which the {@code AudioInputStream} should be |
| * constructed |
| * @return an {@code AudioInputStream} object based on the audio file data |
| * pointed to by the URL |
| * @throws UnsupportedAudioFileException if the URL does not point to valid |
| * audio file data recognized by the system |
| * @throws IOException if an I/O exception occurs |
| * @throws NullPointerException if {@code url} is {@code null} |
| */ |
| public static AudioInputStream getAudioInputStream(final URL url) |
| throws UnsupportedAudioFileException, IOException { |
| Objects.requireNonNull(url); |
| |
| for (final AudioFileReader reader : getAudioFileReaders()) { |
| try { |
| return reader.getAudioInputStream(url); |
| } catch (final UnsupportedAudioFileException ignored) { |
| } |
| } |
| throw new UnsupportedAudioFileException("URL of unsupported format"); |
| } |
| |
| /** |
| * Obtains an audio input stream from the provided {@code File}. The |
| * {@code File} must point to valid audio file data. |
| * |
| * @param file the {@code File} for which the {@code AudioInputStream} |
| * should be constructed |
| * @return an {@code AudioInputStream} object based on the audio file data |
| * pointed to by the {@code File} |
| * @throws UnsupportedAudioFileException if the {@code File} does not point |
| * to valid audio file data recognized by the system |
| * @throws IOException if an I/O exception occurs |
| * @throws NullPointerException if {@code file} is {@code null} |
| */ |
| public static AudioInputStream getAudioInputStream(final File file) |
| throws UnsupportedAudioFileException, IOException { |
| Objects.requireNonNull(file); |
| |
| for (final AudioFileReader reader : getAudioFileReaders()) { |
| try { |
| return reader.getAudioInputStream(file); |
| } catch (final UnsupportedAudioFileException ignored) { |
| } |
| } |
| throw new UnsupportedAudioFileException("File of unsupported format"); |
| } |
| |
| /** |
| * Obtains the file types for which file writing support is provided by the |
| * system. |
| * |
| * @return array of unique file types. If no file types are supported, an |
| * array of length 0 is returned. |
| */ |
| public static AudioFileFormat.Type[] getAudioFileTypes() { |
| List<AudioFileWriter> providers = getAudioFileWriters(); |
| Set<AudioFileFormat.Type> returnTypesSet = new HashSet<>(); |
| |
| for(int i=0; i < providers.size(); i++) { |
| AudioFileWriter writer = providers.get(i); |
| AudioFileFormat.Type[] fileTypes = writer.getAudioFileTypes(); |
| for(int j=0; j < fileTypes.length; j++) { |
| returnTypesSet.add(fileTypes[j]); |
| } |
| } |
| AudioFileFormat.Type returnTypes[] = |
| returnTypesSet.toArray(new AudioFileFormat.Type[0]); |
| return returnTypes; |
| } |
| |
| /** |
| * Indicates whether file writing support for the specified file type is |
| * provided by the system. |
| * |
| * @param fileType the file type for which write capabilities are queried |
| * @return {@code true} if the file type is supported, otherwise |
| * {@code false} |
| * @throws NullPointerException if {@code fileType} is {@code null} |
| */ |
| public static boolean isFileTypeSupported(AudioFileFormat.Type fileType) { |
| Objects.requireNonNull(fileType); |
| List<AudioFileWriter> providers = getAudioFileWriters(); |
| |
| for(int i=0; i < providers.size(); i++) { |
| AudioFileWriter writer = providers.get(i); |
| if (writer.isFileTypeSupported(fileType)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Obtains the file types that the system can write from the audio input |
| * stream specified. |
| * |
| * @param stream the audio input stream for which audio file type |
| * support is queried |
| * @return array of file types. If no file types are supported, an array of |
| * length 0 is returned. |
| * @throws NullPointerException if {@code stream} is {@code null} |
| */ |
| public static AudioFileFormat.Type[] getAudioFileTypes(AudioInputStream stream) { |
| Objects.requireNonNull(stream); |
| List<AudioFileWriter> providers = getAudioFileWriters(); |
| Set<AudioFileFormat.Type> returnTypesSet = new HashSet<>(); |
| |
| for(int i=0; i < providers.size(); i++) { |
| AudioFileWriter writer = providers.get(i); |
| AudioFileFormat.Type[] fileTypes = writer.getAudioFileTypes(stream); |
| for(int j=0; j < fileTypes.length; j++) { |
| returnTypesSet.add(fileTypes[j]); |
| } |
| } |
| AudioFileFormat.Type returnTypes[] = |
| returnTypesSet.toArray(new AudioFileFormat.Type[0]); |
| return returnTypes; |
| } |
| |
| /** |
| * Indicates whether an audio file of the specified file type can be written |
| * from the indicated audio input stream. |
| * |
| * @param fileType the file type for which write capabilities are queried |
| * @param stream the stream for which file-writing support is queried |
| * @return {@code true} if the file type is supported for this audio input |
| * stream, otherwise {@code false} |
| * @throws NullPointerException if {@code fileType} or {@code stream} are |
| * {@code null} |
| */ |
| public static boolean isFileTypeSupported(AudioFileFormat.Type fileType, |
| AudioInputStream stream) { |
| Objects.requireNonNull(fileType); |
| Objects.requireNonNull(stream); |
| List<AudioFileWriter> providers = getAudioFileWriters(); |
| |
| for(int i=0; i < providers.size(); i++) { |
| AudioFileWriter writer = providers.get(i); |
| if(writer.isFileTypeSupported(fileType, stream)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Writes a stream of bytes representing an audio file of the specified file |
| * type to the output stream provided. Some file types require that the |
| * length be written into the file header; such files cannot be written from |
| * start to finish unless the length is known in advance. An attempt to |
| * write a file of such a type will fail with an IOException if the length |
| * in the audio file type is {@code AudioSystem.NOT_SPECIFIED}. |
| * |
| * @param stream the audio input stream containing audio data to be written |
| * to the file |
| * @param fileType the kind of audio file to write |
| * @param out the stream to which the file data should be written |
| * @return the number of bytes written to the output stream |
| * @throws IOException if an input/output exception occurs |
| * @throws IllegalArgumentException if the file type is not supported by the |
| * system |
| * @throws NullPointerException if {@code stream} or {@code fileType} or |
| * {@code out} are {@code null} |
| * @see #isFileTypeSupported |
| * @see #getAudioFileTypes |
| */ |
| public static int write(final AudioInputStream stream, |
| final AudioFileFormat.Type fileType, |
| final OutputStream out) throws IOException { |
| Objects.requireNonNull(stream); |
| Objects.requireNonNull(fileType); |
| Objects.requireNonNull(out); |
| |
| for (final AudioFileWriter writer : getAudioFileWriters()) { |
| try { |
| return writer.write(stream, fileType, out); |
| } catch (final IllegalArgumentException ignored) { |
| // thrown if this provider cannot write the stream, try next |
| } |
| } |
| // "File type " + type + " not supported." |
| throw new IllegalArgumentException( |
| "could not write audio file: file type not supported: " |
| + fileType); |
| } |
| |
| /** |
| * Writes a stream of bytes representing an audio file of the specified file |
| * type to the external file provided. |
| * |
| * @param stream the audio input stream containing audio data to be written |
| * to the file |
| * @param fileType the kind of audio file to write |
| * @param out the external file to which the file data should be written |
| * @return the number of bytes written to the file |
| * @throws IOException if an I/O exception occurs |
| * @throws IllegalArgumentException if the file type is not supported by the |
| * system |
| * @throws NullPointerException if {@code stream} or {@code fileType} or |
| * {@code out} are {@code null} |
| * @see #isFileTypeSupported |
| * @see #getAudioFileTypes |
| */ |
| public static int write(final AudioInputStream stream, |
| final AudioFileFormat.Type fileType, |
| final File out) throws IOException { |
| Objects.requireNonNull(stream); |
| Objects.requireNonNull(fileType); |
| Objects.requireNonNull(out); |
| |
| for (final AudioFileWriter writer : getAudioFileWriters()) { |
| try { |
| return writer.write(stream, fileType, out); |
| } catch (final IllegalArgumentException ignored) { |
| // thrown if this provider cannot write the stream, try next |
| } |
| } |
| throw new IllegalArgumentException( |
| "could not write audio file: file type not supported: " |
| + fileType); |
| } |
| |
| // METHODS FOR INTERNAL IMPLEMENTATION USE |
| |
| /** |
| * Obtains the set of MixerProviders on the system. |
| */ |
| @SuppressWarnings("unchecked") |
| private static List<MixerProvider> getMixerProviders() { |
| return (List<MixerProvider>) getProviders(MixerProvider.class); |
| } |
| |
| /** |
| * Obtains the set of format converters (codecs, transcoders, etc.) that are |
| * currently installed on the system. |
| * |
| * @return an array of {@link FormatConversionProvider} objects representing |
| * the available format converters. If no format converters readers |
| * are available on the system, an array of length 0 is returned. |
| */ |
| @SuppressWarnings("unchecked") |
| private static List<FormatConversionProvider> getFormatConversionProviders() { |
| return (List<FormatConversionProvider>) getProviders(FormatConversionProvider.class); |
| } |
| |
| /** |
| * Obtains the set of audio file readers that are currently installed on the |
| * system. |
| * |
| * @return a List of {@link AudioFileReader} objects representing the |
| * installed audio file readers. If no audio file readers are |
| * available on the system, an empty List is returned. |
| */ |
| @SuppressWarnings("unchecked") |
| private static List<AudioFileReader> getAudioFileReaders() { |
| return (List<AudioFileReader>)getProviders(AudioFileReader.class); |
| } |
| |
| /** |
| * Obtains the set of audio file writers that are currently installed on the |
| * system. |
| * |
| * @return a List of {@link AudioFileWriter} objects representing the |
| * available audio file writers. If no audio file writers are |
| * available on the system, an empty List is returned. |
| */ |
| @SuppressWarnings("unchecked") |
| private static List<AudioFileWriter> getAudioFileWriters() { |
| return (List<AudioFileWriter>)getProviders(AudioFileWriter.class); |
| } |
| |
| /** |
| * Attempts to locate and return a default Mixer that provides lines of the |
| * specified type. |
| * |
| * @param providers the installed mixer providers |
| * @param info The requested line type TargetDataLine.class, Clip.class or |
| * Port.class |
| * @return a Mixer that matches the requirements, or null if no default |
| * mixer found |
| */ |
| private static Mixer getDefaultMixer(List<MixerProvider> providers, Line.Info info) { |
| Class<?> lineClass = info.getLineClass(); |
| String providerClassName = JDK13Services.getDefaultProviderClassName(lineClass); |
| String instanceName = JDK13Services.getDefaultInstanceName(lineClass); |
| Mixer mixer; |
| |
| if (providerClassName != null) { |
| MixerProvider defaultProvider = getNamedProvider(providerClassName, providers); |
| if (defaultProvider != null) { |
| if (instanceName != null) { |
| mixer = getNamedMixer(instanceName, defaultProvider, info); |
| if (mixer != null) { |
| return mixer; |
| } |
| } else { |
| mixer = getFirstMixer(defaultProvider, info, |
| false /* mixing not required*/); |
| if (mixer != null) { |
| return mixer; |
| } |
| } |
| |
| } |
| } |
| |
| /* Provider class not specified or |
| provider class cannot be found, or |
| provider class and instance specified and instance cannot be found or is not appropriate */ |
| if (instanceName != null) { |
| mixer = getNamedMixer(instanceName, providers, info); |
| if (mixer != null) { |
| return mixer; |
| } |
| } |
| |
| |
| /* No default are specified, or if something is specified, everything |
| failed. */ |
| return null; |
| } |
| |
| /** |
| * Return a MixerProvider of a given class from the list of MixerProviders. |
| * This method never requires the returned Mixer to do mixing. |
| * |
| * @param providerClassName The class name of the provider to be returned |
| * @param providers The list of MixerProviders that is searched |
| * @return A MixerProvider of the requested class, or null if none is found |
| */ |
| private static MixerProvider getNamedProvider(String providerClassName, |
| List<MixerProvider> providers) { |
| for(int i = 0; i < providers.size(); i++) { |
| MixerProvider provider = providers.get(i); |
| if (provider.getClass().getName().equals(providerClassName)) { |
| return provider; |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * Return a Mixer with a given name from a given MixerProvider. This method |
| * never requires the returned Mixer to do mixing. |
| * |
| * @param mixerName The name of the Mixer to be returned |
| * @param provider The MixerProvider to check for Mixers |
| * @param info The type of line the returned Mixer is required to support |
| * @return A Mixer matching the requirements, or null if none is found |
| */ |
| private static Mixer getNamedMixer(String mixerName, |
| MixerProvider provider, |
| Line.Info info) { |
| Mixer.Info[] infos = provider.getMixerInfo(); |
| for (int i = 0; i < infos.length; i++) { |
| if (infos[i].getName().equals(mixerName)) { |
| Mixer mixer = provider.getMixer(infos[i]); |
| if (isAppropriateMixer(mixer, info, false)) { |
| return mixer; |
| } |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * From a List of MixerProviders, return a Mixer with a given name. This |
| * method never requires the returned Mixer to do mixing. |
| * |
| * @param mixerName The name of the Mixer to be returned |
| * @param providers The List of MixerProviders to check for Mixers |
| * @param info The type of line the returned Mixer is required to support |
| * @return A Mixer matching the requirements, or null if none is found |
| */ |
| private static Mixer getNamedMixer(String mixerName, |
| List<MixerProvider> providers, |
| Line.Info info) { |
| for(int i = 0; i < providers.size(); i++) { |
| MixerProvider provider = providers.get(i); |
| Mixer mixer = getNamedMixer(mixerName, provider, info); |
| if (mixer != null) { |
| return mixer; |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * From a given MixerProvider, return the first appropriate Mixer. |
| * |
| * @param provider The MixerProvider to check for Mixers |
| * @param info The type of line the returned Mixer is required to support |
| * @param isMixingRequired If true, only Mixers that support mixing are |
| * returned for line types of SourceDataLine and Clip |
| * @return A Mixer that is considered appropriate, or null if none is found |
| */ |
| private static Mixer getFirstMixer(MixerProvider provider, |
| Line.Info info, |
| boolean isMixingRequired) { |
| Mixer.Info[] infos = provider.getMixerInfo(); |
| for (int j = 0; j < infos.length; j++) { |
| Mixer mixer = provider.getMixer(infos[j]); |
| if (isAppropriateMixer(mixer, info, isMixingRequired)) { |
| return mixer; |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * Checks if a Mixer is appropriate. A Mixer is considered appropriate if it |
| * support the given line type. If isMixingRequired is true and the line |
| * type is an output one (SourceDataLine, Clip), the mixer is appropriate if |
| * it supports at least 2 (concurrent) lines of the given type. |
| * |
| * @return {@code true} if the mixer is considered appropriate according to |
| * the rules given above, {@code false} otherwise |
| */ |
| private static boolean isAppropriateMixer(Mixer mixer, |
| Line.Info lineInfo, |
| boolean isMixingRequired) { |
| if (! mixer.isLineSupported(lineInfo)) { |
| return false; |
| } |
| Class<?> lineClass = lineInfo.getLineClass(); |
| if (isMixingRequired |
| && (SourceDataLine.class.isAssignableFrom(lineClass) || |
| Clip.class.isAssignableFrom(lineClass))) { |
| int maxLines = mixer.getMaxLines(lineInfo); |
| return ((maxLines == NOT_SPECIFIED) || (maxLines > 1)); |
| } |
| return true; |
| } |
| |
| /** |
| * Like getMixerInfo, but return List. |
| */ |
| private static List<Mixer.Info> getMixerInfoList() { |
| List<MixerProvider> providers = getMixerProviders(); |
| return getMixerInfoList(providers); |
| } |
| |
| /** |
| * Like getMixerInfo, but return List. |
| */ |
| private static List<Mixer.Info> getMixerInfoList(List<MixerProvider> providers) { |
| List<Mixer.Info> infos = new ArrayList<>(); |
| |
| Mixer.Info[] someInfos; // per-mixer |
| Mixer.Info[] allInfos; // for all mixers |
| |
| for(int i = 0; i < providers.size(); i++ ) { |
| someInfos = providers.get(i).getMixerInfo(); |
| |
| for (int j = 0; j < someInfos.length; j++) { |
| infos.add(someInfos[j]); |
| } |
| } |
| |
| return infos; |
| } |
| |
| /** |
| * Obtains the set of services currently installed on the system using the |
| * SPI mechanism in 1.3. |
| * |
| * @return a List of instances of providers for the requested service. If no |
| * providers are available, a vector of length 0 will be returned. |
| */ |
| private static List<?> getProviders(Class<?> providerClass) { |
| return JDK13Services.getProviders(providerClass); |
| } |
| } |
