5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25 package com.sun.media.sound;
26
27 /**
28 * A resampler that uses third-order (cubic) interpolation.
29 *
30 * @author Karl Helgason
31 */
32 public final class SoftCubicResampler extends SoftAbstractResampler {
33
34 public int getPadding() {
35 return 3;
36 }
37
38 public void interpolate(float[] in, float[] in_offset, float in_end,
39 float[] startpitch, float pitchstep, float[] out, int[] out_offset,
40 int out_end) {
41 float pitch = startpitch[0];
42 float ix = in_offset[0];
43 int ox = out_offset[0];
44 float ix_end = in_end;
45 int ox_end = out_end;
46 if (pitchstep == 0) {
47 while (ix < ix_end && ox < ox_end) {
48 int iix = (int) ix;
49 float fix = ix - iix;
50 float y0 = in[iix - 1];
51 float y1 = in[iix];
52 float y2 = in[iix + 1];
53 float y3 = in[iix + 2];
54 float a0 = y3 - y2 + y1 - y0;
55 float a1 = y0 - y1 - a0;
56 float a2 = y2 - y0;
57 float a3 = y1;
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5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package com.sun.media.sound;
27
28 /**
29 * A resampler that uses third-order (cubic) interpolation.
30 *
31 * @author Karl Helgason
32 */
33 public final class SoftCubicResampler extends SoftAbstractResampler {
34
35 @Override
36 public int getPadding() {
37 return 3;
38 }
39
40 @Override
41 public void interpolate(float[] in, float[] in_offset, float in_end,
42 float[] startpitch, float pitchstep, float[] out, int[] out_offset,
43 int out_end) {
44 float pitch = startpitch[0];
45 float ix = in_offset[0];
46 int ox = out_offset[0];
47 float ix_end = in_end;
48 int ox_end = out_end;
49 if (pitchstep == 0) {
50 while (ix < ix_end && ox < ox_end) {
51 int iix = (int) ix;
52 float fix = ix - iix;
53 float y0 = in[iix - 1];
54 float y1 = in[iix];
55 float y2 = in[iix + 1];
56 float y3 = in[iix + 2];
57 float a0 = y3 - y2 + y1 - y0;
58 float a1 = y0 - y1 - a0;
59 float a2 = y2 - y0;
60 float a3 = y1;
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