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1 /*
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2 Cross-Modal DAW Prototype - Prototype of a simple Cross-Modal Digital Audio Workstation.
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3
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4 Copyright (C) 2015 Queen Mary University of London (http://depic.eecs.qmul.ac.uk/)
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5
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6 This program is free software: you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation, either version 3 of the License, or
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9 (at your option) any later version.
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10
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11 This program is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with this program. If not, see <http://www.gnu.org/licenses/>.
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18 */
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19 package uk.ac.qmul.eecs.depic.daw;
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20
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21 import uk.ac.qmul.eecs.depic.patterns.MathUtils;
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22 import uk.ac.qmul.eecs.depic.patterns.Range;
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23
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24 /**
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25 *
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26 * A Chunk is a set of contiguous audio samples. It is used in the visual representation of a sound wave where only the maximum
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27 * and minimum values of all the samples are taken into account. In the sound wave a chuck would be drawn as a vertical
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28 * line at a specific x position, all the contiguous chunks make the sound wave as usually drawn.
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29 *
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30 */
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31 public class Chunk extends Range<Float> {
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32 public static final Chunk SILENCE = new Chunk((short)0,(short)0);
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33 private float normalizedStart;
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34 private float normalizedEnd;
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35
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36 public Chunk(Chunk chunk1, Chunk chunk2) {
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37 super(chunk1, chunk2);
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38
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39 normalizedStart = Math.min(chunk1.getNormStart(), chunk2.getNormStart());
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40 normalizedEnd = Math.max(chunk1.getNormEnd(), chunk2.getNormEnd());
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41 }
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42
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43 public Chunk(Short s1, Short s2) {
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44 normalizedStart = (s1-Short.MIN_VALUE)/(float)domain();
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45 normalizedEnd = (s2-Short.MIN_VALUE)/(float)domain();
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46
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47 MathUtils.Scale scale = new MathUtils.Scale(0.0f, 1.0f, -1.0f, 1.0f);
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48 start = scale.linear(normalizedStart);
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49 end = scale.linear(normalizedEnd);
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50 }
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51
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52 public static int domain() {
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53 return Short.MAX_VALUE - Short.MIN_VALUE;
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54 }
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55
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56 public float getNormStart(){
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57 return normalizedStart;
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58 }
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59
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60 public float getNormEnd(){
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61 return normalizedEnd;
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62 }
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63
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64 @Override
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65 public String toString(){
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66 return "Chunk - range:["+getStart()+","+getEnd()+"] normalized range ["+getNormStart()+","+getNormEnd()+"]" ;
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67 }
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68 }
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69
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70
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