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Diffstat (limited to 'songdbj/javazoom/jl/decoder/OutputChannels.java')
| -rw-r--r-- | songdbj/javazoom/jl/decoder/OutputChannels.java | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/songdbj/javazoom/jl/decoder/OutputChannels.java b/songdbj/javazoom/jl/decoder/OutputChannels.java new file mode 100644 index 0000000..58c8310 --- /dev/null +++ b/songdbj/javazoom/jl/decoder/OutputChannels.java @@ -0,0 +1,143 @@ +/* + * 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; + } + +} |