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authorPhil Burk <[email protected]>2016-11-30 22:13:22 -0800
committerPhil Burk <[email protected]>2016-11-30 22:13:44 -0800
commit265381fa6d885f7fa7fdb76c0e6bf0c9511c63b4 (patch)
tree583b57862b4d24162dd8b095f874b0fdd44f068e /src/com/jsyn/data/FloatSample.java
parent9fc77bbf87bea398dedfa76e2ab71933169ef5ad (diff)
Added evaluate() to FloatSample.
Diffstat (limited to 'src/com/jsyn/data/FloatSample.java')
-rw-r--r--src/com/jsyn/data/FloatSample.java30
1 files changed, 21 insertions, 9 deletions
diff --git a/src/com/jsyn/data/FloatSample.java b/src/com/jsyn/data/FloatSample.java
index 78c71d7..0855786 100644
--- a/src/com/jsyn/data/FloatSample.java
+++ b/src/com/jsyn/data/FloatSample.java
@@ -4,9 +4,9 @@
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
- *
+ *
* http://www.apache.org/licenses/LICENSE-2.0
- *
+ *
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -25,7 +25,7 @@ import com.jsyn.util.SampleLoader;
/**
* Store multi-channel floating point audio data in an interleaved buffer. The values are stored as
* 32-bit floats. You can play samples using one of the readers, for example VariableRateMonoReader.
- *
+ *
* @author Phil Burk (C) 2010 Mobileer Inc
* @see SampleLoader
* @see FixedRateMonoReader
@@ -33,7 +33,7 @@ import com.jsyn.util.SampleLoader;
* @see VariableRateMonoReader
* @see VariableRateStereoReader
*/
-public class FloatSample extends AudioSample {
+public class FloatSample extends AudioSample implements Function {
private float[] buffer;
public FloatSample() {
@@ -59,7 +59,7 @@ public class FloatSample extends AudioSample {
/**
* Create an silent sample with enough memory to hold the audio data. The number of sample
* numbers in the array will be numFrames*channelsPerFrame.
- *
+ *
* @param numFrames number of sample groups. A stereo frame contains 2 samples.
* @param channelsPerFrame 1 for mono, 2 for stereo
*/
@@ -70,7 +70,7 @@ public class FloatSample extends AudioSample {
/**
* Allocate memory to hold the audio data. The number of sample numbers in the array will be
* numFrames*channelsPerFrame.
- *
+ *
* @param numFrames number of sample groups. A stereo frame contains 2 samples.
* @param channelsPerFrame 1 for mono, 2 for stereo
*/
@@ -83,7 +83,7 @@ public class FloatSample extends AudioSample {
/**
* Note that in a stereo sample, a frame has two values.
- *
+ *
* @param startFrame index of frame in the sample
* @param data data to be written
* @param startIndex index of first value in array
@@ -97,7 +97,7 @@ public class FloatSample extends AudioSample {
/**
* Note that in a stereo sample, a frame has two values.
- *
+ *
* @param startFrame index of frame in the sample
* @param data array to receive the data from the sample
* @param startIndex index of first location in array to start filling
@@ -112,7 +112,7 @@ public class FloatSample extends AudioSample {
/**
* Write the entire array to the sample. The sample data must have already been allocated with
* enough room to contain the data.
- *
+ *
* @param data
*/
public void write(float[] data) {
@@ -143,4 +143,16 @@ public class FloatSample extends AudioSample {
float target = buffer[index + 1];
return ((target - source) * phase) + source;
}
+
+ @Override
+ public double evaluate(double input) {
+ // Input ranges from -1 to +1
+ // Map it to range of sample with guard point.
+ double normalizedInput = (input + 1.0) * 0.5;
+ // Clip so it does not go out of range of the sample.
+ if (normalizedInput < 0.0) normalizedInput = 0.0;
+ else if (normalizedInput > 1.0) normalizedInput = 1.0;
+ double fractionalIndex = (getNumFrames() - 1.01) * normalizedInput;
+ return interpolate(fractionalIndex);
+ }
}