| javax.sound.sampled.Mixer
| Mixer | | public interface Mixer extends Line(Code) | | A mixer is an audio device with one or more lines. It need not be
designed for mixing audio signals. A mixer that actually mixes audio
has multiple input (source) lines and at least one output (target) line.
The former are often instances of classes that implement
SourceDataLine ,
and the latter,
TargetDataLine .
Port
objects, too, are either source lines or target lines.
A mixer can accept prerecorded, loopable sound as input, by having
some of its source lines be instances of objects that implement the
Clip interface.
Through methods of the Line interface, which Mixer extends,
a mixer might provide a set of controls that are global to the mixer. For example,
the mixer can have a master gain control. These global controls are distinct
from the controls belonging to each of the mixer's individual lines.
Some mixers, especially
those with internal digital mixing capabilities, may provide
additional capabilities by implementing the DataLine interface.
A mixer can support synchronization of its lines. When one line in
a synchronized group is started or stopped, the other lines in the group
automatically start or stop simultaneously with the explicitly affected one.
author:
Kara Kytle
version:
1.38, 07/05/05
since:
1.3 |
| Inner Class :public static class Info | |
| Method Summary | |
| public Line | getLine(Line.Info info)
Obtains a line that is available for use and that matches the description
in the specified Line.Info object. | | public int | getMaxLines(Line.Info info)
Obtains the approximate maximum number of lines of the requested type that can be open
simultaneously on the mixer.
Certain types of mixers do not have a hard bound and may allow opening more lines.
Since certain lines are a shared resource, a mixer may not be able to open the maximum
number of lines if another process has opened lines of this mixer.
The requested type is any line that matches the description in
the provided Line.Info object. | | public Info | getMixerInfo()
Obtains information about this mixer, including the product's name,
version, vendor, etc. | | public Line.Info[] | getSourceLineInfo()
Obtains information about the set of source lines supported
by this mixer.
Some source lines may only be available when this mixer is open.
array of Line.Info objects representing source linesfor this mixer. | | public Line.Info[] | getSourceLineInfo(Line.Info info)
Obtains information about source lines of a particular type supported
by the mixer.
Some source lines may only be available when this mixer is open.
Parameters:
info - a Line.Info object describing lines about which informationis queried an array of Line.Info objects describing source lines matchingthe type requested. | | public Line[] | getSourceLines()
Obtains the set of all source lines currently open to this mixer. | | public Line.Info[] | getTargetLineInfo()
Obtains information about the set of target lines supported
by this mixer.
Some target lines may only be available when this mixer is open.
array of Line.Info objects representing target linesfor this mixer. | | public Line.Info[] | getTargetLineInfo(Line.Info info)
Obtains information about target lines of a particular type supported
by the mixer.
Some target lines may only be available when this mixer is open.
Parameters:
info - a Line.Info object describing lines about which informationis queried an array of Line.Info objects describing target lines matchingthe type requested. | | public Line[] | getTargetLines()
Obtains the set of all target lines currently open from this mixer. | | public boolean | isLineSupported(Line.Info info)
Indicates whether the mixer supports a line (or lines) that match
the specified Line.Info object. | | public boolean | isSynchronizationSupported(Line[] lines, boolean maintainSync)
Reports whether this mixer supports synchronization of the specified set of lines. | | public void | synchronize(Line[] lines, boolean maintainSync)
Synchronizes two or more lines. | | public void | unsynchronize(Line[] lines)
Releases synchronization for the specified lines. |
| getLine | | public Line getLine(Line.Info info) throws LineUnavailableException(Code) | | Obtains a line that is available for use and that matches the description
in the specified Line.Info object.
If a DataLine is requested, and info
is an instance of DataLine.Info specifying at
least one fully qualified audio format, the last one
will be used as the default format of the returned
DataLine.
Parameters:
info - describes the desired line
throws:
LineUnavailableException - if a matching lineis not available due to resource restrictions
throws:
IllegalArgumentException - if this mixer doesnot support any lines matching the description
throws:
SecurityException - if a matching lineis not available due to security restrictions |
| getMaxLines | | public int getMaxLines(Line.Info info)(Code) | | Obtains the approximate maximum number of lines of the requested type that can be open
simultaneously on the mixer.
Certain types of mixers do not have a hard bound and may allow opening more lines.
Since certain lines are a shared resource, a mixer may not be able to open the maximum
number of lines if another process has opened lines of this mixer.
The requested type is any line that matches the description in
the provided Line.Info object. For example, if the info
object represents a speaker
port, and the mixer supports exactly one speaker port, this method
should return 1. If the info object represents a source data line
and the mixer supports the use of 32 source data lines simultaneously,
the return value should be 32.
If there is no limit, this function returns AudioSystem.NOT_SPECIFIED.
Parameters:
info - a Line.Info that describes the line for whichthe number of supported instances is queried the maximum number of matching lines supported, or AudioSystem.NOT_SPECIFIED |
| getMixerInfo | | public Info getMixerInfo()(Code) | | Obtains information about this mixer, including the product's name,
version, vendor, etc.
a mixer info object that describes this mixer
See Also: Mixer.Info |
| getSourceLineInfo | | public Line.Info[] getSourceLineInfo()(Code) | | Obtains information about the set of source lines supported
by this mixer.
Some source lines may only be available when this mixer is open.
array of Line.Info objects representing source linesfor this mixer. If no source lines are supported,an array of length 0 is returned. |
| getSourceLineInfo | | public Line.Info[] getSourceLineInfo(Line.Info info)(Code) | | Obtains information about source lines of a particular type supported
by the mixer.
Some source lines may only be available when this mixer is open.
Parameters:
info - a Line.Info object describing lines about which informationis queried an array of Line.Info objects describing source lines matchingthe type requested. If no matching source lines are supported, an array of length 0is returned. |
| getSourceLines | | public Line[] getSourceLines()(Code) | | Obtains the set of all source lines currently open to this mixer.
the source lines currently open to the mixer.If no source lines are currently open to this mixer, anarray of length 0 is returned.
throws:
SecurityException - if the matching linesare not available due to security restrictions |
| getTargetLineInfo | | public Line.Info[] getTargetLineInfo()(Code) | | Obtains information about the set of target lines supported
by this mixer.
Some target lines may only be available when this mixer is open.
array of Line.Info objects representing target linesfor this mixer. If no target lines are supported,an array of length 0 is returned. |
| getTargetLineInfo | | public Line.Info[] getTargetLineInfo(Line.Info info)(Code) | | Obtains information about target lines of a particular type supported
by the mixer.
Some target lines may only be available when this mixer is open.
Parameters:
info - a Line.Info object describing lines about which informationis queried an array of Line.Info objects describing target lines matchingthe type requested. If no matching target lines are supported, an array of length 0is returned. |
| getTargetLines | | public Line[] getTargetLines()(Code) | | Obtains the set of all target lines currently open from this mixer.
target lines currently open from the mixer.If no target lines are currently open from this mixer, anarray of length 0 is returned.
throws:
SecurityException - if the matching linesare not available due to security restrictions |
| isLineSupported | | public boolean isLineSupported(Line.Info info)(Code) | | Indicates whether the mixer supports a line (or lines) that match
the specified Line.Info object.
Some lines may only be supported when this mixer is open.
Parameters:
info - describes the line for which support is queried true if at least one matching line issupported, false otherwise |
| isSynchronizationSupported | | public boolean isSynchronizationSupported(Line[] lines, boolean maintainSync)(Code) | | Reports whether this mixer supports synchronization of the specified set of lines.
Parameters:
lines - the set of lines for which synchronization support is queried
Parameters:
maintainSync - true if the synchronizationmust be precisely maintained (i.e., the synchronization must be sample-accurate)at all times during operation of the lines , or falseif precise synchronization is required only during start and stop operations true if the lines can be synchronized, falseotherwise |
| synchronize | | public void synchronize(Line[] lines, boolean maintainSync)(Code) | | Synchronizes two or more lines. Any subsequent command that starts or stops
audio playback or capture for one of these lines will exert the
same effect on the other lines in the group, so that they start or stop playing or
capturing data simultaneously.
Parameters:
lines - the lines that should be synchronized
Parameters:
maintainSync - true if the synchronizationmust be precisely maintained (i.e., the synchronization must be sample-accurate)at all times during operation of the lines , or falseif precise synchronization is required only during start and stop operations
throws:
IllegalArgumentException - if the lines cannot be synchronized.This may occur if the lines are of different types or have differentformats for which this mixer does not support synchronization, or ifall lines specified do not belong to this mixer. |
| unsynchronize | | public void unsynchronize(Line[] lines)(Code) | | Releases synchronization for the specified lines. The array must
be identical to one for which synchronization has already been
established; otherwise an exception may be thrown. However, null
may be specified, in which case all currently synchronized lines that belong
to this mixer are unsynchronized.
Parameters:
lines - the synchronized lines for which synchronization should bereleased, or null for all this mixer's synchronized lines
throws:
IllegalArgumentException - if the lines cannot be unsynchronized.This may occur if the argument specified does not exactly match a setof lines for which synchronization has already been established. |
|
|