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/*
* 11/19/04 1.0 moved to LGPL.
* 12/12/99 Initial implementation. mdm@techie.com.
*-----------------------------------------------------------------------
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as published
* by the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*----------------------------------------------------------------------
*/
package javazoom.jl.decoder;
/**
* A Type-safe representation of the the supported output channel
* constants.
*
* This class is immutable and, hence, is thread safe.
*
* @author Mat McGowan 12/12/99
* @since 0.0.7
*/
public class OutputChannels
{
/**
* Flag to indicate output should include both channels.
*/
public static final int BOTH_CHANNELS = 0;
/**
* Flag to indicate output should include the left channel only.
*/
public static final int LEFT_CHANNEL = 1;
/**
* Flag to indicate output should include the right channel only.
*/
public static final int RIGHT_CHANNEL = 2;
/**
* Flag to indicate output is mono.
*/
public static final int DOWNMIX_CHANNELS = 3;
public static final OutputChannels LEFT = new OutputChannels(LEFT_CHANNEL);
public static final OutputChannels RIGHT = new OutputChannels(RIGHT_CHANNEL);
public static final OutputChannels BOTH = new OutputChannels(BOTH_CHANNELS);
public static final OutputChannels DOWNMIX = new OutputChannels(DOWNMIX_CHANNELS);
private /*final*/ int outputChannels;
/**
* Creates an <code>OutputChannels</code> instance
* corresponding to the given channel code.
*
* @param code one of the OutputChannels channel code constants.
*
* @throws IllegalArgumentException if code is not a valid
* channel code.
*/
static public OutputChannels fromInt(int code)
{
switch (code)
{
case LEFT_CHANNEL:
return LEFT;
case RIGHT_CHANNEL:
return RIGHT;
case BOTH_CHANNELS:
return BOTH;
case DOWNMIX_CHANNELS:
return DOWNMIX;
default:
throw new IllegalArgumentException("Invalid channel code: "+code);
}
}
private OutputChannels(int channels)
{
outputChannels = channels;
if (channels<0 || channels>3)
throw new IllegalArgumentException("channels");
}
/**
* Retrieves the code representing the desired output channels.
* Will be one of LEFT_CHANNEL, RIGHT_CHANNEL, BOTH_CHANNELS
* or DOWNMIX_CHANNELS.
*
* @return the channel code represented by this instance.
*/
public int getChannelsOutputCode()
{
return outputChannels;
}
/**
* Retrieves the number of output channels represented
* by this channel output type.
*
* @return The number of output channels for this channel output
* type. This will be 2 for BOTH_CHANNELS only, and 1
* for all other types.
*/
public int getChannelCount()
{
int count = (outputChannels==BOTH_CHANNELS) ? 2 : 1;
return count;
}
public boolean equals(Object o)
{
boolean equals = false;
if (o instanceof OutputChannels)
{
OutputChannels oc = (OutputChannels)o;
equals = (oc.outputChannels == outputChannels);
}
return equals;
}
public int hashCode()
{
return outputChannels;
}
}
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