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/*
* Portable Audio I/O Library
* Java Binding for PortAudio
*
* Based on the Open Source API proposed by Ross Bencina
* Copyright (c) 2008 Ross Bencina
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/*
* The text above constitutes the entire PortAudio license; however,
* the PortAudio community also makes the following non-binding requests:
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version. It is also
* requested that these non-binding requests be included along with the
* license above.
*/
/** @file
@ingroup bindings_java
@brief A blocking read/write stream.
*/
package com.portaudio;
/**
* Represents a stream for blocking read/write I/O.
*
* This Java object contains the pointer to a PortAudio stream stored as a long.
* It is passed to PortAudio when calling stream related functions.
*
* To create one of these, call PortAudio.openStream().
*
* @see PortAudio
*
* @author Phil Burk
*
*/
public class BlockingStream
{
// nativeStream is only accessed by the native code. It contains a pointer
// to a PaStream.
private long nativeStream;
private int inputFormat = -1;
private int outputFormat = -1;
protected BlockingStream()
{
}
/**
* @return number of frames that can be read without blocking.
*/
public native int getReadAvailable();
/**
* @return number of frames that can be written without blocking.
*/
public native int getWriteAvailable();
private native boolean readFloats( float[] buffer, int numFrames );
private native boolean writeFloats( float[] buffer, int numFrames );
/**
* Read 32-bit floating point data from the stream into the array.
*
* @param buffer
* @param numFrames
* number of frames to read
* @return true if an input overflow occurred
*/
public boolean read( float[] buffer, int numFrames )
{
if( inputFormat != PortAudio.FORMAT_FLOAT_32 )
{
throw new RuntimeException(
"Tried to read float samples from a non float stream." );
}
return readFloats( buffer, numFrames );
}
/**
* Write 32-bit floating point data to the stream from the array. The data
* should be in the range -1.0 to +1.0.
*
* @param buffer
* @param numFrames
* number of frames to write
* @return true if an output underflow occurred
*/
public boolean write( float[] buffer, int numFrames )
{
if( outputFormat != PortAudio.FORMAT_FLOAT_32 )
{
throw new RuntimeException(
"Tried to write float samples to a non float stream." );
}
return writeFloats( buffer, numFrames );
}
private native boolean readShorts( short[] buffer, int numFrames );
private native boolean writeShorts( short[] buffer, int numFrames );
/**
* Read 16-bit integer data to the stream from the array.
*
* @param buffer
* @param numFrames
* number of frames to write
* @return true if an input overflow occurred
*/
public boolean read( short[] buffer, int numFrames )
{
if( inputFormat != PortAudio.FORMAT_INT_16 )
{
throw new RuntimeException(
"Tried to read short samples from a non short stream." );
}
return readShorts( buffer, numFrames );
}
/**
* Write 16-bit integer data to the stream from the array.
*
* @param buffer
* @param numFrames
* number of frames to write
* @return true if an output underflow occurred
*/
public boolean write( short[] buffer, int numFrames )
{
if( outputFormat != PortAudio.FORMAT_INT_16 )
{
throw new RuntimeException(
"Tried to write short samples from a non short stream." );
}
return writeShorts( buffer, numFrames );
}
/**
* Atart audio I/O.
*/
public native void start();
/**
* Wait for the stream to play all of the data that has been written then
* stop.
*/
public native void stop();
/**
* Stop immediately and lose any data that was written but not played.
*/
public native void abort();
/**
* Close the stream and zero out the pointer. Do not reference the stream
* after this.
*/
public native void close();
public native boolean isStopped();
public native boolean isActive();
public String toString()
{
return "BlockingStream: streamPtr = " + Long.toHexString( nativeStream )
+ ", inFormat = " + inputFormat + ", outFormat = "
+ outputFormat;
}
/**
* Get audio time related to this stream. Note that it may not start at 0.0.
*/
public native double getTime();
private native void getInfo( StreamInfo streamInfo );
public StreamInfo getInfo()
{
StreamInfo streamInfo = new StreamInfo();
getInfo( streamInfo );
return streamInfo;
}
}
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