78 lines
2.2 KiB
Java
78 lines
2.2 KiB
Java
package org.jcodec.audio;
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import java.io.IOException;
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import java.nio.FloatBuffer;
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public class Audio {
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public static void transfer(AudioSource src, AudioSink sink) throws IOException {
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filterTransfer(src, new DummyFilter(1), sink);
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}
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public static void filterTransfer(AudioSource src, AudioFilter filter, AudioSink sink) throws IOException {
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if (filter.getNInputs() != 1)
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throw new IllegalArgumentException("Audio filter has # inputs != 1");
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if (filter.getNOutputs() != 1)
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throw new IllegalArgumentException("Audio filter has # outputs != 1");
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if (filter.getDelay() != 0)
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throw new IllegalArgumentException("Audio filter has delay");
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FloatBuffer[] ins = { FloatBuffer.allocate(4096) };
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FloatBuffer[] outs = { FloatBuffer.allocate(8192) };
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long[] pos = new long[1];
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while (src.readFloat(ins[0]) != -1) {
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ins[0].flip();
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filter.filter(ins, pos, outs);
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pos[0] = pos[0] + (long)ins[0].position();
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rotate(ins[0]);
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outs[0].flip();
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sink.writeFloat(outs[0]);
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outs[0].clear();
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}
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}
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public static void print(FloatBuffer buf) {
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FloatBuffer dup = buf.duplicate();
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while (dup.hasRemaining())
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System.out.print(String.format("%.3f,", dup.get()));
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System.out.println();
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}
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public static void rotate(FloatBuffer buf) {
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int pos;
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for (pos = 0; buf.hasRemaining(); pos++)
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buf.put(pos, buf.get());
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buf.position(pos);
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buf.limit(buf.capacity());
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}
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public static class DummyFilter implements AudioFilter {
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private int nInputs;
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public DummyFilter(int nInputs) {
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this.nInputs = nInputs;
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}
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public void filter(FloatBuffer[] _in, long[] inPos, FloatBuffer[] out) {
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for (int i = 0; i < _in.length; i++) {
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if (out[i].remaining() >= _in[i].remaining()) {
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out[i].put(_in[i]);
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} else {
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FloatBuffer duplicate = _in[i].duplicate();
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duplicate.limit(_in[i].position() + out[i].remaining());
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out[i].put(duplicate);
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}
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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.nInputs;
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}
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public int getNOutputs() {
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return this.nInputs;
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}
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}
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}
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