diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/com/jsyn/data/FloatSample.java | 30 |
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); + } } |