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Artifact providing audio provessing functionality such as generating sine waves or writing raw audio samples to WAV files.
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// /////////////////////////////////////////////////////////////////////////////
// REFCODES.ORG
// /////////////////////////////////////////////////////////////////////////////
// This code is copyright (c) by Siegfried Steiner, Munich, Germany, distributed
// on an "AS IS" BASIS WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, and licen-
// sed under the following (see "http://en.wikipedia.org/wiki/Multi-licensing")
// licenses:
// -----------------------------------------------------------------------------
// GNU General Public License, v3.0 ("http://www.gnu.org/licenses/gpl-3.0.html")
// -----------------------------------------------------------------------------
// Apache License, v2.0 ("http://www.apache.org/licenses/TEXT-2.0")
// -----------------------------------------------------------------------------
// Please contact the copyright holding author(s) of the software artifacts in
// question for licensing issues not being covered by the above listed licenses,
// also regarding commercial licensing models or regarding the compatibility
// with other open source licenses.
// /////////////////////////////////////////////////////////////////////////////

package org.refcodes.audio;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintStream;

/**
 * The {@link AbstractSvgSampleWriter} provides a foundation to write sound
 * samples to a SVG file.
 *
 * @param  The {@link SoundSample} (sub-)type on which the
 *        {@link SampleWriter} implementation is to operate on.
 * @param  The {@link SampleWriter} implementing this
 *        {@link AbstractSvgSampleWriter}.
 */
public abstract class AbstractSvgSampleWriter> implements SampleWriter {

	// /////////////////////////////////////////////////////////////////////////
	// CONSTANTS:
	// /////////////////////////////////////////////////////////////////////////
	// /////////////////////////////////////////////////////////////////////////
	// VARIABLES:
	// /////////////////////////////////////////////////////////////////////////

	protected PrintStream _printStream;

	// /////////////////////////////////////////////////////////////////////////
	// CONSTRUCTORS:
	// /////////////////////////////////////////////////////////////////////////

	/**
	 * Constructs the {@link AbstractSvgSampleWriter} for writing sound samples
	 * to a SVG file or stream.
	 * 
	 * @param aFile The {@link File} where to write the SVG records to.
	 * 
	 * @throws FileNotFoundException If the given file object does not denote an
	 *         existing, writable regular file and a new regular file of that
	 *         name cannot be created, or if some other error occurs while
	 *         opening or creating the file.
	 */
	public AbstractSvgSampleWriter( File aFile ) throws FileNotFoundException {
		this( new PrintStream( aFile ) );

	}

	/**
	 * Constructs the {@link AbstractSvgSampleWriter} for writing sound samples
	 * to a SVG file or stream.
	 * 
	 * @param aOutputStream The {@link OutputStream} where to write the SVG
	 *        records to.
	 */
	public AbstractSvgSampleWriter( OutputStream aOutputStream ) {
		this( new PrintStream( aOutputStream ) );
	}

	/**
	 * Constructs the {@link AbstractSvgSampleWriter} for writing sound samples
	 * to a SVG file or stream.
	 * 
	 * @param aPrintStream The {@link PrintStream} where to write the SVG
	 *        records to.
	 */
	public AbstractSvgSampleWriter( PrintStream aPrintStream ) {
		_printStream = aPrintStream;
	}

	// /////////////////////////////////////////////////////////////////////////
	// METHODS:
	// /////////////////////////////////////////////////////////////////////////

	/**
	 * {@inheritDoc}
	 */
	@Override
	public void close() throws IOException {
		_printStream.println( "" );
		_printStream.close();
	}

	// /////////////////////////////////////////////////////////////////////////
	// HOOKS:
	// /////////////////////////////////////////////////////////////////////////
	protected double toYCoordinate( double aSampleData, double aFactor ) {
		return aSampleData * aFactor / 2 + ( aFactor / 2 );
	}

	/**
	 * Writes the SVG file's header, the SVG's tail is written upon invoking
	 * {@link #close()}.
	 */
	protected void writeSvgHeader() {
		_printStream.println( "