46 lines
1.5 KiB
Java
46 lines
1.5 KiB
Java
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package org.jcodec.audio;
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import java.nio.FloatBuffer;
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import org.jcodec.common.AudioFormat;
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import org.jcodec.common.Preconditions;
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public class ChannelMerge implements AudioFilter {
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private AudioFormat format;
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public ChannelMerge(AudioFormat format) {
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this.format = format;
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}
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public void filter(FloatBuffer[] _in, long[] inPos, FloatBuffer[] out) {
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if (_in.length != this.format.getChannels())
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throw new IllegalArgumentException("Channel merge must be supplied with " + this.format.getChannels() + " input buffers to hold the channels.");
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if (out.length != 1)
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throw new IllegalArgumentException("Channel merget invoked on more then one output");
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FloatBuffer out0 = out[0];
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int min = Integer.MAX_VALUE;
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for (int k = 0; k < _in.length; k++) {
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if (_in[k].remaining() < min)
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min = _in[k].remaining();
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}
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for (int j = 0; j < _in.length; j++)
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Preconditions.checkState((_in[j].remaining() == min));
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if (out0.remaining() < min * _in.length)
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throw new IllegalArgumentException("Supplied output buffer is not big enough to hold " + min + " * " + _in.length + " = " + min * _in.length + " output samples.");
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for (int i = 0; i < min; i++) {
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for (int m = 0; m < _in.length; m++)
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out0.put(_in[m].get());
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}
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}
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public int getDelay() {
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return 0;
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}
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public int getNInputs() {
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return this.format.getChannels();
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}
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public int getNOutputs() {
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return 1;
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}
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}
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