9fee0ec4ca
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7101 a1c6a512-1295-4272-9138-f99709370657
143 lines
3.7 KiB
Java
143 lines
3.7 KiB
Java
/*
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* 11/19/04 1.0 moved to LGPL.
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* 12/12/99 Initial implementation. mdm@techie.com.
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*-----------------------------------------------------------------------
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Library General Public License as published
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* by the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*----------------------------------------------------------------------
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*/
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package javazoom.jl.decoder;
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/**
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* A Type-safe representation of the the supported output channel
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* constants.
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*
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* This class is immutable and, hence, is thread safe.
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*
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* @author Mat McGowan 12/12/99
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* @since 0.0.7
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*/
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public class OutputChannels
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{
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/**
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* Flag to indicate output should include both channels.
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*/
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public static final int BOTH_CHANNELS = 0;
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/**
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* Flag to indicate output should include the left channel only.
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*/
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public static final int LEFT_CHANNEL = 1;
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/**
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* Flag to indicate output should include the right channel only.
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*/
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public static final int RIGHT_CHANNEL = 2;
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/**
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* Flag to indicate output is mono.
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*/
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public static final int DOWNMIX_CHANNELS = 3;
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public static final OutputChannels LEFT = new OutputChannels(LEFT_CHANNEL);
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public static final OutputChannels RIGHT = new OutputChannels(RIGHT_CHANNEL);
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public static final OutputChannels BOTH = new OutputChannels(BOTH_CHANNELS);
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public static final OutputChannels DOWNMIX = new OutputChannels(DOWNMIX_CHANNELS);
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private /*final*/ int outputChannels;
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/**
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* Creates an <code>OutputChannels</code> instance
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* corresponding to the given channel code.
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*
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* @param code one of the OutputChannels channel code constants.
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*
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* @throws IllegalArgumentException if code is not a valid
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* channel code.
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*/
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static public OutputChannels fromInt(int code)
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{
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switch (code)
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{
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case LEFT_CHANNEL:
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return LEFT;
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case RIGHT_CHANNEL:
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return RIGHT;
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case BOTH_CHANNELS:
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return BOTH;
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case DOWNMIX_CHANNELS:
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return DOWNMIX;
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default:
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throw new IllegalArgumentException("Invalid channel code: "+code);
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}
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}
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private OutputChannels(int channels)
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{
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outputChannels = channels;
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if (channels<0 || channels>3)
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throw new IllegalArgumentException("channels");
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}
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/**
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* Retrieves the code representing the desired output channels.
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* Will be one of LEFT_CHANNEL, RIGHT_CHANNEL, BOTH_CHANNELS
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* or DOWNMIX_CHANNELS.
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*
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* @return the channel code represented by this instance.
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*/
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public int getChannelsOutputCode()
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{
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return outputChannels;
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}
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/**
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* Retrieves the number of output channels represented
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* by this channel output type.
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*
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* @return The number of output channels for this channel output
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* type. This will be 2 for BOTH_CHANNELS only, and 1
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* for all other types.
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*/
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public int getChannelCount()
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{
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int count = (outputChannels==BOTH_CHANNELS) ? 2 : 1;
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return count;
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}
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public boolean equals(Object o)
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{
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boolean equals = false;
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if (o instanceof OutputChannels)
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{
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OutputChannels oc = (OutputChannels)o;
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equals = (oc.outputChannels == outputChannels);
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}
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return equals;
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}
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public int hashCode()
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{
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return outputChannels;
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}
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}
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