mirror
/
osci-render
kopia lustrzana https://github.com/jameshball/osci-render
1
0
Forkuj 0
Kod Zgłoszenia Packages Projekty Wydania Wiki Aktywność

Replace old FFT classes with more complete one and implement frequency analyser

pull/35/head
James Ball 2021-05-23 13:01:12 +01:00
rodzic ce6616f398
commit 6e4f58d1d3
9 zmienionych plików z 794 dodań i 883 usunięć
Pokaż statystyki Ściągnij plik aktualizacji Ściągnij plik porównania Expand all files Collapse all files

2
pom.xml
Wyświetl plik

@ -6,7 +6,7 @@
<groupId>sh.ball</groupId>
<artifactId>osci-render</artifactId>
<version>1.4.1</version>
<version>1.5.0</version>
<name>osci-render</name>

68
src/main/java/sh/ball/audio/FrequencyAnalyser.java
Wyświetl plik

@ -1,7 +1,6 @@
package sh.ball.audio;
import sh.ball.audio.fft.FFTFactory;
import sh.ball.audio.fft.Transform;
import sh.ball.audio.fft.FFT;
import java.util.ArrayList;
import java.util.List;
@ -25,20 +24,16 @@ public class FrequencyAnalyser<S, T> implements Runnable {
listeners.add(listener);
}
private void notifyListeners(double frequency) {
private void notifyListeners(double leftFrequency, double rightFrequency) {
for (FrequencyListener listener : listeners) {
listener.updateFrequency(frequency);
listener.updateFrequency(leftFrequency, rightFrequency);
}
}
// Adapted from https://stackoverflow.com/questions/53997426/java-how-to-get-current-frequency-of-audio-input
@Override
public void run() {
final byte[] buf = new byte[2 << 16]; // <--- increase this for higher frequency resolution
final int numberOfSamples = (buf.length / 2) / frameSize;
Transform fft = FFTFactory.getInstance().create(numberOfSamples);
int frequencyBin = sampleRate / (numberOfSamples / 2);
byte[] buf = new byte[2 << 18]; // <--- increase this for higher frequency resolution
while (true) {
try {
@ -46,39 +41,52 @@ public class FrequencyAnalyser<S, T> implements Runnable {
} catch (InterruptedException e) {
e.printStackTrace();
}
// the stream represents each sample as two bytes -> decode
final float[] samples = decode(buf);
final float[][] transformed = fft.transform(samples);
final float[] realPart = transformed[0];
final float[] imaginaryPart = transformed[1];
final double[] magnitudes = toMagnitudes(realPart, imaginaryPart);
double[] leftSamples = decode(buf, true);
double[] rightSamples = decode(buf, false);
int maxIndex = 0;
double max = Double.NEGATIVE_INFINITY;
for (int i = 1; i < magnitudes.length / 2; i++) {
if (i * frequencyBin < 20 || i * frequencyBin > 20000) {
FFT leftFft = new FFT(leftSamples, null, false, true);
FFT rightFft = new FFT(rightSamples, null, false, true);
double[] leftMags = leftFft.getMagnitudeSpectrum();
double[] rightMags = rightFft.getMagnitudeSpectrum();
double[] bins = leftFft.getBinLabels(sampleRate);
int maxLeftIndex = 0;
double maxLeft = Double.NEGATIVE_INFINITY;
int maxRightIndex = 0;
double maxRight = Double.NEGATIVE_INFINITY;
for (int i = 1; i < leftMags.length; i++) {
if (bins[i] < 20 || bins[i] > 20000) {
continue;
}
if (magnitudes[i] > max) {
maxIndex = i;
max = magnitudes[i];
if (leftMags[i] > maxLeft) {
maxLeftIndex = i;
maxLeft = leftMags[i];
}
if (rightMags[i] > maxRight) {
maxRightIndex = i;
maxRight = rightMags[i];
}
}
System.out.println((maxIndex + 1) * frequencyBin * 1.05);
notifyListeners(bins[maxLeftIndex], bins[maxRightIndex]);
}
}
private float[] decode(final byte[] buf) {
final float[] fbuf = new float[(buf.length / 2) / frameSize];
private double[] decode(final byte[] buf, boolean decodeLeft) {
final double[] fbuf = new double[(buf.length / 2) / frameSize];
int byteNum = 0;
int i = 0;
for (int pos = 0; pos < buf.length; pos += frameSize) {
if (byteNum < 2) {
int sample = byteToIntLittleEndian(buf, pos, frameSize);
// normalize to [0,1] (not strictly necessary, but makes things easier)
fbuf[i] = sample / NORMALIZATION_FACTOR_2_BYTES;
i++;
int sample = byteToIntLittleEndian(buf, pos, frameSize);
// normalize to [0,1] (not strictly necessary, but makes things easier)
double normalSample = sample / NORMALIZATION_FACTOR_2_BYTES;
if (decodeLeft) {
if (byteNum < 2) {
fbuf[i++] = normalSample;
}
} else if (byteNum >= 2) {
fbuf[i++] = normalSample;
}
byteNum++;
byteNum %= 4;

2
src/main/java/sh/ball/audio/FrequencyListener.java
Wyświetl plik

@ -2,5 +2,5 @@ package sh.ball.audio;
public interface FrequencyListener {
void updateFrequency(double frequency);
void updateFrequency(double leftFrequency, double rightFrequency);
}

736
src/main/java/sh/ball/audio/fft/FFT.java 100644
Wyświetl plik

@ -0,0 +1,736 @@
/*
* @(#)FFT.java 1.0 April 5, 2005.
*
* Cory McKay
* McGill Univarsity
*
* https://sourceforge.net/p/jaudio/svn/2/tree/jAudio%201.0/src/jAudioFeatureExtractor/jAudioTools/FFT.java
*
* GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
The licenses for most software are designed to take away your
freedom to share and change it. By contrast, the GNU General Public
License is intended to guarantee your freedom to share and change free
software--to make sure the software is free for all its users. This
General Public License applies to most of the Free Software
Foundation's software and to any other program whose authors commit to
using it. (Some other Free Software Foundation software is covered by
the GNU Lesser General Public License instead.) You can apply it to
your programs, too.
When we speak of free software, we are referring to freedom, not
price. Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
this service if you wish), that you receive source code or can get it
if you want it, that you can change the software or use pieces of it
in new free programs; and that you know you can do these things.
To protect your rights, we need to make restrictions that forbid
anyone to deny you these rights or to ask you to surrender the rights.
These restrictions translate to certain responsibilities for you if you
distribute copies of the software, or if you modify it.
For example, if you distribute copies of such a program, whether
gratis or for a fee, you must give the recipients all the rights that
you have. You must make sure that they, too, receive or can get the
source code. And you must show them these terms so they know their
rights.
We protect your rights with two steps: (1) copyright the software, and
(2) offer you this license which gives you legal permission to copy,
distribute and/or modify the software.
Also, for each author's protection and ours, we want to make certain
that everyone understands that there is no warranty for this free
software. If the software is modified by someone else and passed on, we
want its recipients to know that what they have is not the original, so
that any problems introduced by others will not reflect on the original
authors' reputations.
Finally, any free program is threatened constantly by software
patents. We wish to avoid the danger that redistributors of a free
program will individually obtain patent licenses, in effect making the
program proprietary. To prevent this, we have made it clear that any
patent must be licensed for everyone's free use or not licensed at all.
The precise terms and conditions for copying, distribution and
modification follow.
GNU GENERAL PUBLIC LICENSE
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
0. This License applies to any program or other work which contains
a notice placed by the copyright holder saying it may be distributed
under the terms of this General Public License. The "Program", below,
refers to any such program or work, and a "work based on the Program"
means either the Program or any derivative work under copyright law:
that is to say, a work containing the Program or a portion of it,
either verbatim or with modifications and/or translated into another
language. (Hereinafter, translation is included without limitation in
the term "modification".) Each licensee is addressed as "you".
Activities other than copying, distribution and modification are not
covered by this License; they are outside its scope. The act of
running the Program is not restricted, and the output from the Program
is covered only if its contents constitute a work based on the
Program (independent of having been made by running the Program).
Whether that is true depends on what the Program does.
1. You may copy and distribute verbatim copies of the Program's
source code as you receive it, in any medium, provided that you
conspicuously and appropriately publish on each copy an appropriate
copyright notice and disclaimer of warranty; keep intact all the
notices that refer to this License and to the absence of any warranty;
and give any other recipients of the Program a copy of this License
along with the Program.
You may charge a fee for the physical act of transferring a copy, and
you may at your option offer warranty protection in exchange for a fee.
2. You may modify your copy or copies of the Program or any portion
of it, thus forming a work based on the Program, and copy and
distribute such modifications or work under the terms of Section 1
above, provided that you also meet all of these conditions:
a) You must cause the modified files to carry prominent notices
stating that you changed the files and the date of any change.
b) You must cause any work that you distribute or publish, that in
whole or in part contains or is derived from the Program or any
part thereof, to be licensed as a whole at no charge to all third
parties under the terms of this License.
c) If the modified program normally reads commands interactively
when run, you must cause it, when started running for such
interactive use in the most ordinary way, to print or display an
announcement including an appropriate copyright notice and a
notice that there is no warranty (or else, saying that you provide
a warranty) and that users may redistribute the program under
these conditions, and telling the user how to view a copy of this
License. (Exception: if the Program itself is interactive but
does not normally print such an announcement, your work based on
the Program is not required to print an announcement.)
These requirements apply to the modified work as a whole. If
identifiable sections of that work are not derived from the Program,
and can be reasonably considered independent and separate works in
themselves, then this License, and its terms, do not apply to those
sections when you distribute them as separate works. But when you
distribute the same sections as part of a whole which is a work based
on the Program, the distribution of the whole must be on the terms of
this License, whose permissions for other licensees extend to the
entire whole, and thus to each and every part regardless of who wrote it.
Thus, it is not the intent of this section to claim rights or contest
your rights to work written entirely by you; rather, the intent is to
exercise the right to control the distribution of derivative or
collective works based on the Program.
In addition, mere aggregation of another work not based on the Program
with the Program (or with a work based on the Program) on a volume of
a storage or distribution medium does not bring the other work under
the scope of this License.
3. You may copy and distribute the Program (or a work based on it,
under Section 2) in object code or executable form under the terms of
Sections 1 and 2 above provided that you also do one of the following:
a) Accompany it with the complete corresponding machine-readable
source code, which must be distributed under the terms of Sections
1 and 2 above on a medium customarily used for software interchange; or,
b) Accompany it with a written offer, valid for at least three
years, to give any third party, for a charge no more than your
cost of physically performing source distribution, a complete
machine-readable copy of the corresponding source code, to be
distributed under the terms of Sections 1 and 2 above on a medium
customarily used for software interchange; or,
c) Accompany it with the information you received as to the offer
to distribute corresponding source code. (This alternative is
allowed only for noncommercial distribution and only if you
received the program in object code or executable form with such
an offer, in accord with Subsection b above.)
The source code for a work means the preferred form of the work for
making modifications to it. For an executable work, complete source
code means all the source code for all modules it contains, plus any
associated interface definition files, plus the scripts used to
control compilation and installation of the executable. However, as a
special exception, the source code distributed need not include
anything that is normally distributed (in either source or binary
form) with the major components (compiler, kernel, and so on) of the
operating system on which the executable runs, unless that component
itself accompanies the executable.
If distribution of executable or object code is made by offering
access to copy from a designated place, then offering equivalent
access to copy the source code from the same place counts as
distribution of the source code, even though third parties are not
compelled to copy the source along with the object code.
4. You may not copy, modify, sublicense, or distribute the Program
except as expressly provided under this License. Any attempt
otherwise to copy, modify, sublicense or distribute the Program is
void, and will automatically terminate your rights under this License.
However, parties who have received copies, or rights, from you under
this License will not have their licenses terminated so long as such
parties remain in full compliance.
5. You are not required to accept this License, since you have not
signed it. However, nothing else grants you permission to modify or
distribute the Program or its derivative works. These actions are
prohibited by law if you do not accept this License. Therefore, by
modifying or distributing the Program (or any work based on the
Program), you indicate your acceptance of this License to do so, and
all its terms and conditions for copying, distributing or modifying
the Program or works based on it.
6. Each time you redistribute the Program (or any work based on the
Program), the recipient automatically receives a license from the
original licensor to copy, distribute or modify the Program subject to
these terms and conditions. You may not impose any further
restrictions on the recipients' exercise of the rights granted herein.
You are not responsible for enforcing compliance by third parties to
this License.
7. If, as a consequence of a court judgment or allegation of patent
infringement or for any other reason (not limited to patent issues),
conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License. If you cannot
distribute so as to satisfy simultaneously your obligations under this
License and any other pertinent obligations, then as a consequence you
may not distribute the Program at all. For example, if a patent
license would not permit royalty-free redistribution of the Program by
all those who receive copies directly or indirectly through you, then
the only way you could satisfy both it and this License would be to
refrain entirely from distribution of the Program.
If any portion of this section is held invalid or unenforceable under
any particular circumstance, the balance of the section is intended to
apply and the section as a whole is intended to apply in other
circumstances.
It is not the purpose of this section to induce you to infringe any
patents or other property right claims or to contest validity of any
such claims; this section has the sole purpose of protecting the
integrity of the free software distribution system, which is
implemented by public license practices. Many people have made
generous contributions to the wide range of software distributed
through that system in reliance on consistent application of that
system; it is up to the author/donor to decide if he or she is willing
to distribute software through any other system and a licensee cannot
impose that choice.
This section is intended to make thoroughly clear what is believed to
be a consequence of the rest of this License.
8. If the distribution and/or use of the Program is restricted in
certain countries either by patents or by copyrighted interfaces, the
original copyright holder who places the Program under this License
may add an explicit geographical distribution limitation excluding
those countries, so that distribution is permitted only in or among
countries not thus excluded. In such case, this License incorporates
the limitation as if written in the body of this License.
9. The Free Software Foundation may publish revised and/or new versions
of the General Public License from time to time. Such new versions will
be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.
Each version is given a distinguishing version number. If the Program
specifies a version number of this License which applies to it and "any
later version", you have the option of following the terms and conditions
either of that version or of any later version published by the Free
Software Foundation. If the Program does not specify a version number of
this License, you may choose any version ever published by the Free Software
Foundation.
10. If you wish to incorporate parts of the Program into other free
programs whose distribution conditions are different, write to the author
to ask for permission. For software which is copyrighted by the Free
Software Foundation, write to the Free Software Foundation; we sometimes
make exceptions for this. Our decision will be guided by the two goals
of preserving the free status of all derivatives of our free software and
of promoting the sharing and reuse of software generally.
NO WARRANTY
11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
REPAIR OR CORRECTION.
12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
convey the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
Also add information on how to contact you by electronic and paper mail.
If the program is interactive, make it output a short notice like this
when it starts in an interactive mode:
Gnomovision version 69, Copyright (C) year name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, the commands you use may
be called something other than `show w' and `show c'; they could even be
mouse-clicks or menu items--whatever suits your program.
You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
proprietary programs. If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License.
*/
package sh.ball.audio.fft;
/**
* This class performs a complex to complex Fast Fourier Transform. Forward and inverse
* transforms may both be performed. The transforms may be performed with or without
* the application of a Hanning window.
*
* <p>The FFT is performed by this class' constructor. The real and imaginary results
* are both stored, and the magnitude spectrum, power spectrum and phase angles may
* also be accessed (along with appropriate frequency bin labels for the magnitude
* and power spectra).
*
* @author Cory McKay
*/
public class FFT
{
/* FIELDS ******************************************************************/
// The results of the FFT.
private double[] real_output;
private double[] imaginary_output;
// The phase angles
private double[] output_angle;
// Magnitude and power spectra
private double[] output_magnitude;
private double[] output_power;
/* CONSTRUCTOR *************************************************************/
/**
* Performs the Fourier transform and stores the real and imaginary results.
* Input signals are zero-padded if they do not have a length equal to a
* power of 2.
*
* @param real_input The real part of the signal to be transformed.
* @param imaginary_input The imaginary part of the signal to be.
* transformed. This may be null if the signal
* is entirely real.
* @param inverse_transform A value of false implies that a forward
* transform is to be applied, and a value of
* true means that an inverse transform is tob
* be applied.
* @param use_hanning_window A value of true means that a Hanning window
* will be applied to the real_input. A value
* of valse will result in the application of
* a Hanning window.
* @throws Exception Throws an exception if the real and imaginary
* inputs are of different sizes or if less than
* three input samples are provided.
*/
public FFT( double[] real_input,
double[] imaginary_input,
boolean inverse_transform,
boolean use_hanning_window ) {
// Throw an exception if non-matching input signals are provided
if (imaginary_input != null)
if (real_input.length != imaginary_input.length)
throw new RuntimeException("Imaginary and real inputs are of different sizes.");
// Throw an exception if less than three samples are provided
if (real_input.length < 3)
throw new RuntimeException( "Only " + real_input.length + " samples provided.\n" +
"At least three are needed." );
// Verify that the input size has a number of samples that is a
// power of 2. If not, then increase the size of the array using
// zero-padding. Also creates a zero filled imaginary component
// of the input if none was specified.
int valid_size = ensureIsPowerOfN(real_input.length, 2);
if (valid_size != real_input.length)
{
double[] temp = new double[valid_size];
for (int i = 0; i < real_input.length; i++)
temp[i] = real_input[i];
for (int i = real_input.length; i < valid_size; i++)
temp[i] = 0.0;
real_input = temp;
if (imaginary_input == null)
{
imaginary_input = new double[valid_size];
for (int i = 0; i < imaginary_input.length; i++)
imaginary_input[i] = 0.0;
}
else
{
temp = new double[valid_size];
for (int i = 0; i < imaginary_input.length; i++)
temp[i] = imaginary_input[i];
for (int i = imaginary_input.length; i < valid_size; i++)
temp[i] = 0.0;
imaginary_input = temp;
}
}
else if (imaginary_input == null)
{
imaginary_input = new double[valid_size];
for (int i = 0; i < imaginary_input.length; i++)
imaginary_input[i] = 0.0;
}
// Instantiate the arrays to hold the output and copy the input
// to them, since the algorithm used here is self-processing
real_output = new double[valid_size];
System.arraycopy(real_input, 0, real_output, 0, valid_size);
imaginary_output = new double[valid_size];
System.arraycopy(imaginary_input, 0, imaginary_output, 0, valid_size);
// Apply a Hanning window to the real values if this option is
// selected
if (use_hanning_window)
{
for (int i = 0; i < real_output.length; i++)
{
double hanning = 0.5 - 0.5 * Math.cos(2 * Math.PI * i / valid_size);
real_output[i] *= hanning;
}
}
// Determine whether this is a forward or inverse transform
int forward_transform = 1;
if (inverse_transform)
forward_transform = -1;
// Reorder the input data into reverse binary order
double scale = 1.0;
int j = 0;
for (int i = 0; i < valid_size; ++i)
{
if (j >= i)
{
double tempr = real_output[j] * scale;
double tempi = imaginary_output[j] * scale;
real_output[j] = real_output[i] * scale;
imaginary_output[j] = imaginary_output[i] * scale;
real_output[i] = tempr;
imaginary_output[i] = tempi;
}
int m = valid_size / 2;
while (m >= 1 && j >= m)
{
j -= m;
m /= 2;
}
j += m;
}
// Perform the spectral recombination stage by stage
int stage = 0;
int max_spectra_for_stage;
int step_size;
for( max_spectra_for_stage = 1, step_size = 2 * max_spectra_for_stage;
max_spectra_for_stage < valid_size;
max_spectra_for_stage = step_size, step_size = 2 * max_spectra_for_stage)
{
double delta_angle = forward_transform * Math.PI / max_spectra_for_stage;
// Loop once for each individual spectra
for (int spectra_count = 0; spectra_count < max_spectra_for_stage; ++spectra_count)
{
double angle = spectra_count * delta_angle;
double real_correction = Math.cos(angle);
double imag_correction = Math.sin(angle);
int right = 0;
for (int left = spectra_count; left < valid_size; left += step_size)
{
right = left + max_spectra_for_stage;
double temp_real = real_correction * real_output[right] -
imag_correction * imaginary_output[right];
double temp_imag = real_correction * imaginary_output[right] +
imag_correction * real_output[right];
real_output[right] = real_output[left] - temp_real;
imaginary_output[right] = imaginary_output[left] - temp_imag;
real_output[left] += temp_real;
imaginary_output[left] += temp_imag;
}
}
max_spectra_for_stage = step_size;
}
// Set the angle and magnitude to null originally
output_angle = null;
output_power = null;
output_magnitude = null;
}
/* PUBLIC METHODS **********************************************************/
/**
* Returns the magnitudes spectrum. It only makes sense to call
* this method if this object was instantiated as a forward Fourier
* transform.
*
* <p>Only the left side of the spectrum is returned, as the folded
* portion of the spectrum is redundant for the purpose of the magnitude
* spectrum. This means that the bins only go up to half of the
* sampling rate.
*
* @return The magnitude of each frequency bin.
*/
public double[] getMagnitudeSpectrum()
{
// Only calculate the magnitudes if they have not yet been calculated
if (output_magnitude == null)
{
int number_unfolded_bins = imaginary_output.length / 2;
output_magnitude = new double[number_unfolded_bins];
for(int i = 0; i < output_magnitude.length; i++)
output_magnitude[i] = ( Math.sqrt(real_output[i] * real_output[i] + imaginary_output[i] * imaginary_output[i]) ) / real_output.length;
}
// Return the magnitudes
return output_magnitude;
}
/**
* Returns the power spectrum. It only makes sense to call
* this method if this object was instantiated as a forward Fourier
* transform.
*
* <p>Only the left side of the spectrum is returned, as the folded
* portion of the spectrum is redundant for the purpose of the power
* spectrum. This means that the bins only go up to half of the
* sampling rate.
*
* @return The magnitude of each frequency bin.
*/
public double[] getPowerSpectrum()
{
// Only calculate the powers if they have not yet been calculated
if (output_power == null)
{
int number_unfolded_bins = imaginary_output.length / 2;
output_power = new double[number_unfolded_bins];
for(int i = 0; i < output_power.length; i++)
output_power[i] = (real_output[i] * real_output[i] + imaginary_output[i] * imaginary_output[i]) / real_output.length;
}
// Return the power
return output_power;
}
/**
* Returns the phase angle for each frequency bin. It only makes sense to
* call this method if this object was instantiated as a forward Fourier
* transform.
*
* <p>Only the left side of the spectrum is returned, as the folded
* portion of the spectrum is redundant for the purpose of the phase
* angles. This means that the bins only go up to half of the
* sampling rate.
*
* @return The phase angle for each frequency bin in degrees.
*/
public double[] getPhaseAngles()
{
// Only calculate the angles if they have not yet been calculated
if (output_angle == null)
{
int number_unfolded_bins = imaginary_output.length / 2;
output_angle = new double[number_unfolded_bins];
for(int i = 0; i < output_angle.length; i++)
{
if(imaginary_output[i] == 0.0 && real_output[i] == 0.0)
output_angle[i] = 0.0;
else
output_angle[i] = Math.atan(imaginary_output[i] / real_output[i]) * 180.0 / Math.PI;
if(real_output[i] < 0.0 && imaginary_output[i] == 0.0)
output_angle[i] = 180.0;
else if(real_output[i] < 0.0 && imaginary_output[i] == -0.0)
output_angle[i] = -180.0;
else if(real_output[i] < 0.0 && imaginary_output[i] > 0.0)
output_angle[i] += 180.0;
else if(real_output[i] < 0.0 && imaginary_output[i] < 0.0)
output_angle[i] += -180.0;
}
}
// Return the phase angles
return output_angle;
}
/**
* Returns the frequency bin labels for each bin referred to by the
* real values, imaginary values, magnitudes and phase angles as
* determined by the given sampling rate.
*
* @param sampling_rate The sampling rate that was used to perform
* the FFT.
* @return The bin labels.
*/
public double[] getBinLabels(double sampling_rate)
{
int number_bins = real_output.length;
double bin_width = sampling_rate / (double) number_bins;
int number_unfolded_bins = imaginary_output.length / 2;
double[] labels = new double[number_unfolded_bins];
labels[0] = 0.0;
for (int bin = 1; bin < labels.length; bin++)
labels[bin] = bin * bin_width;
return labels;
}
/**
* Returns the real values as calculated by the FFT.
*
* @return The real values.
*/
public double[] getRealValues()
{
return real_output;
}
/**
* Returns the real values as calculated by the FFT.
*
* @return The real values.
*/
public double[] getImaginaryValues()
{
return imaginary_output;
}
/* PRIVATE METHODS *********************************************************/
/**
* If the given x is a power of the given n, then x is returned.
* If not, then the next value above the given x that is a power
* of n is returned.
*
* <p><b>IMPORTANT:</b> Both x and n must be greater than zero.
*
* @param x The value to ensure is a power of n.
* @param n The power to base x's validation on.
*/
private static int ensureIsPowerOfN(int x, int n)
{
double log_value = logBaseN((double) x, (double) n);
int log_int = (int) log_value;
int valid_size = pow(n, log_int);
if (valid_size != x)
valid_size = pow(n, log_int + 1);
return valid_size;
}
/**
* Returns the logarithm of the specified base of the given number.
*
* <p><b>IMPORTANT:</b> Both x and n must be greater than zero.
*
* @param x The value to find the log of.
* @param n The base of the logarithm.
*/
private static double logBaseN(double x, double n)
{
return (Math.log10(x) / Math.log10(n));
}
/**
* Returns the given a raised to the power of the given b.
*
* <p><b>IMPORTANT:</b> b must be greater than zero.
*
* @param a The base.
* @param b The exponent.
*/
private static int pow(int a, int b)
{
int result = a;
for (int i = 1; i < b; i++)
result *= a;
return result;
}
}

279
src/main/java/sh/ball/audio/fft/FFTFactory.java
Wyświetl plik

@ -1,279 +0,0 @@
/*
* =================================================
* Copyright 2011 tagtraum industries incorporated
* All rights reserved.
* =================================================
*/
// FROM: https://github.com/hendriks73/jipes/blob/master/src/main/java/com/tagtraum/jipes/math/FFTFactory.java
// LICENSE: https://github.com/hendriks73/jipes/blob/master/LICENSE.txt
// GNU LESSER GENERAL PUBLIC LICENSE Version 2.1, February 1999
package sh.ball.audio.fft;
/**
* <p>Factory for FFTransforms. Using the factory allows for sliding-in a faster, perhaps
* native implementation (like it's done in <a href="http://www.beatunes.com/">beaTunes</a>).
* </p>
* <p>In order to use a factory other than the default factory, you need to specify
* its classname with the system property <code>com.tagtraum.jipes.math.FFTFactory</code>.
* I.e.
* <xmp>-Dcom.tagtraum.jipes.math.FFTFactory=YOUR.CLASSNAME.HERE</xmp>
* <p>
*
* @author <a href="mailto:hs@tagtraum.com">Hendrik Schreiber</a>
*/
public abstract class FFTFactory {
public static final String FACTORYCLASS_PROPERTY_NAME = FFTFactory.class.getName();
private static FFTFactory instance;
protected FFTFactory() {
}
/**
* Creates a factory for FFT Transform objects.
*
* @return factory instance
*/
public synchronized static FFTFactory getInstance() {
if (instance == null) {
final String factoryClassname = System.getProperty(FACTORYCLASS_PROPERTY_NAME);
if (factoryClassname != null) {
try {
instance = (FFTFactory) Class.forName(factoryClassname, true, Thread.currentThread().getContextClassLoader()).newInstance();
} catch (Exception e) {
e.printStackTrace();
}
}
if (instance == null) {
// fall back to built-in factory
instance = new JavaFFTFactory();
}
}
return instance;
}
/**
* Creates an instance of the fast Fourier transform (FFT).
* By specifying the number of samples implementations can pre-create lookup tables to speed
* up the actual transform.
*
* @param numberOfSamples number of samples the FFT instance should be able to process
* @return FFT instance
*/
public abstract Transform create(int numberOfSamples);
/**
* Default implementation for a Java FFT factory.
*/
private static class JavaFFTFactory extends FFTFactory {
private JavaFFT last;
@Override
public synchronized Transform create(final int numberOfSamples) {
if (last != null && last.numberOfSamples == numberOfSamples) return last;
last = new JavaFFT(numberOfSamples);
return last;
}
}
/**
* Default implementation for a Java FFT.
*/
private static class JavaFFT implements Transform {
private static final int MAX_FAST_BITS = 16;
private static final int[][] FFT_BIT_TABLE = new int[MAX_FAST_BITS][];
private final int numberOfSamples;
private final int[] reverseIndices;
private float[] frequencies;
static {
int len = 2;
for (int b = 1; b <= MAX_FAST_BITS; b++) {
FFT_BIT_TABLE[b - 1] = new int[len];
for (int i = 0; i < len; i++) {
FFT_BIT_TABLE[b - 1][i] = reverseBits(i, b);
}
len <<= 1;
}
}
private JavaFFT(final int numberOfSamples) {
if (!isPowerOfTwo(numberOfSamples)) throw new IllegalArgumentException("N is not a power of 2");
if (numberOfSamples <=0) throw new IllegalArgumentException("N must be greater than 0");
this.numberOfSamples = numberOfSamples;
final int numberOfBits = getNumberOfNeededBits(numberOfSamples);
this.reverseIndices = new int[numberOfSamples];
for (int i = 0; i < numberOfSamples; i++) {
final int j = fastReverseBits(i, numberOfBits);
this.reverseIndices[i] = j;
}
this.frequencies = new float[numberOfSamples];
for (int index=0; index<numberOfSamples; index++) {
if (index <= numberOfSamples / 2) {
this.frequencies[index] = index / numberOfSamples;
} else {
this.frequencies[index] = -((numberOfSamples - index) / (float) numberOfSamples);
}
}
}
public float[][] inverseTransform(final float[] real, final float[] imaginary) throws UnsupportedOperationException {
final float[][] out = new float[2][real.length];
transform(true, real, imaginary, out[0], out[1]);
return out;
}
public float[][] transform(final float[] real) throws UnsupportedOperationException {
final float[][] out = new float[3][real.length];
transform(false, real, null, out[0], out[1]);
out[2] = frequencies.clone();
return out;
}
public float[][] transform(final float[] real, final float[] imaginary) throws UnsupportedOperationException {
final float[][] out = new float[3][real.length];
transform(false, real, imaginary, out[0], out[1]);
out[2] = frequencies.clone();
return out;
}
/**
* Actual fast Fourier transform implementation.
*
* @param inverse inverse or not
* @param realIn real portion input
* @param imaginaryIn imaginary in
* @param realOut real out
* @param imaginaryOut imaginary out
*/
public void transform(final boolean inverse,
final float[] realIn,
final float[] imaginaryIn,
final float[] realOut,
final float[] imaginaryOut) {
if (realIn.length != numberOfSamples) {
throw new IllegalArgumentException("Number of samples must be " + numberOfSamples + " for this instance of JavaFFT");
}
for (int i = 0; i < numberOfSamples; i++) {
realOut[this.reverseIndices[i]] = realIn[i];
}
if (imaginaryIn != null) {
for (int i = 0; i < numberOfSamples; i++) {
imaginaryOut[this.reverseIndices[i]] = imaginaryIn[i];
}
}
int blockEnd = 1;
final double angleNumerator;
if (inverse) angleNumerator = -2.0 * Math.PI;
else angleNumerator = 2.0 * Math.PI;
for (int blockSize = 2; blockSize <= numberOfSamples; blockSize <<= 1) {
final double deltaAngle = angleNumerator / (float) blockSize;
final double sm2 = (-Math.sin(-2 * deltaAngle));
final double sm1 = (-Math.sin(-deltaAngle));
final double cm2 = (Math.cos(-2 * deltaAngle));
final double cm1 = (Math.cos(-deltaAngle));
final double w = 2 * cm1;
double ar1;
double ai1;
double ar2;
double ai2;
for (int i = 0; i < numberOfSamples; i += blockSize) {
ar2 = cm2;
ar1 = cm1;
ai2 = sm2;
ai1 = sm1;
for (int j = i, n = 0; n < blockEnd; j++, n++) {
final double ar0 = w * ar1 - ar2;
ar2 = ar1;
ar1 = ar0;
final double ai0 = w * ai1 - ai2;
ai2 = ai1;
ai1 = ai0;
final int k = j + blockEnd;
/* temp real, temp imaginary */
final double tr = ar0 * realOut[k] - ai0 * imaginaryOut[k];
final double ti = ar0 * imaginaryOut[k] + ai0 * realOut[k];
realOut[k] = (float) (realOut[j] - tr);
imaginaryOut[k] = (float)(imaginaryOut[j] - ti);
realOut[j] += tr;
imaginaryOut[j] += ti;
}
}
blockEnd = blockSize;
}
// normalize, if inverse transform
if (inverse) {
for (int i = 0; i < numberOfSamples; i++) {
realOut[i] /= (float) numberOfSamples;
imaginaryOut[i] /= (float) numberOfSamples;
}
}
}
private static int getNumberOfNeededBits(final int powerOfTwo) {
for (int i = 0; true; i++) {
final int j = powerOfTwo & 1 << i;
if (j != 0) return i;
}
}
private static int reverseBits(final int index, final int numberOfBits) {
int ind = index;
int rev = 0;
for (int i = 0; i < numberOfBits; i++) {
rev = rev << 1 | ind & 1;
ind >>= 1;
}
return rev;
}
private static int fastReverseBits(final int index, final int numberOfBits) {
if (numberOfBits <= MAX_FAST_BITS)
return FFT_BIT_TABLE[numberOfBits - 1][index];
else
return reverseBits(index, numberOfBits);
}
private static boolean isPowerOfTwo(final int number) {
return (number & (number - 1)) == 0;
}
@Override
public boolean equals(final Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
final JavaFFT javaFFT = (JavaFFT) o;
if (numberOfSamples != javaFFT.numberOfSamples) return false;
return true;
}
@Override
public int hashCode() {
return numberOfSamples;
}
@Override
public String toString() {
return "JavaFFT{" +
"N=" + numberOfSamples +
'}';
}
}
}

502
src/main/java/sh/ball/audio/fft/LICENSE.txt
Wyświetl plik

@ -1,502 +0,0 @@
GNU LESSER GENERAL PUBLIC LICENSE
Version 2.1, February 1999
Copyright (C) 1991, 1999 Free Software Foundation, Inc.
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
[This is the first released version of the Lesser GPL. It also counts
as the successor of the GNU Library Public License, version 2, hence
the version number 2.1.]
Preamble
The licenses for most software are designed to take away your
freedom to share and change it. By contrast, the GNU General Public
Licenses are intended to guarantee your freedom to share and change
free software--to make sure the software is free for all its users.
This license, the Lesser General Public License, applies to some
specially designated software packages--typically libraries--of the
Free Software Foundation and other authors who decide to use it. You
can use it too, but we suggest you first think carefully about whether
this license or the ordinary General Public License is the better
strategy to use in any particular case, based on the explanations below.
When we speak of free software, we are referring to freedom of use,
not price. Our General Public Licenses are designed to make sure that
you have the freedom to distribute copies of free software (and charge
for this service if you wish); that you receive source code or can get
it if you want it; that you can change the software and use pieces of
it in new free programs; and that you are informed that you can do
these things.
To protect your rights, we need to make restrictions that forbid
distributors to deny you these rights or to ask you to surrender these
rights. These restrictions translate to certain responsibilities for
you if you distribute copies of the library or if you modify it.
For example, if you distribute copies of the library, whether gratis
or for a fee, you must give the recipients all the rights that we gave
you. You must make sure that they, too, receive or can get the source
code. If you link other code with the library, you must provide
complete object files to the recipients, so that they can relink them
with the library after making changes to the library and recompiling
it. And you must show them these terms so they know their rights.
We protect your rights with a two-step method: (1) we copyright the
library, and (2) we offer you this license, which gives you legal
permission to copy, distribute and/or modify the library.
To protect each distributor, we want to make it very clear that
there is no warranty for the free library. Also, if the library is
modified by someone else and passed on, the recipients should know
that what they have is not the original version, so that the original
author's reputation will not be affected by problems that might be
introduced by others.
Finally, software patents pose a constant threat to the existence of
any free program. We wish to make sure that a company cannot
effectively restrict the users of a free program by obtaining a
restrictive license from a patent holder. Therefore, we insist that
any patent license obtained for a version of the library must be
consistent with the full freedom of use specified in this license.
Most GNU software, including some libraries, is covered by the
ordinary GNU General Public License. This license, the GNU Lesser
General Public License, applies to certain designated libraries, and
is quite different from the ordinary General Public License. We use
this license for certain libraries in order to permit linking those
libraries into non-free programs.
When a program is linked with a library, whether statically or using
a shared library, the combination of the two is legally speaking a
combined work, a derivative of the original library. The ordinary
General Public License therefore permits such linking only if the
entire combination fits its criteria of freedom. The Lesser General
Public License permits more lax criteria for linking other code with
the library.
We call this license the "Lesser" General Public License because it
does Less to protect the user's freedom than the ordinary General
Public License. It also provides other free software developers Less
of an advantage over competing non-free programs. These disadvantages
are the reason we use the ordinary General Public License for many
libraries. However, the Lesser license provides advantages in certain
special circumstances.
For example, on rare occasions, there may be a special need to
encourage the widest possible use of a certain library, so that it becomes
a de-facto standard. To achieve this, non-free programs must be
allowed to use the library. A more frequent case is that a free
library does the same job as widely used non-free libraries. In this
case, there is little to gain by limiting the free library to free
software only, so we use the Lesser General Public License.
In other cases, permission to use a particular library in non-free
programs enables a greater number of people to use a large body of
free software. For example, permission to use the GNU C Library in
non-free programs enables many more people to use the whole GNU
operating system, as well as its variant, the GNU/Linux operating
system.
Although the Lesser General Public License is Less protective of the
users' freedom, it does ensure that the user of a program that is
linked with the Library has the freedom and the wherewithal to run
that program using a modified version of the Library.
The precise terms and conditions for copying, distribution and
modification follow. Pay close attention to the difference between a
"work based on the library" and a "work that uses the library". The
former contains code derived from the library, whereas the latter must
be combined with the library in order to run.
GNU LESSER GENERAL PUBLIC LICENSE
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
0. This License Agreement applies to any software library or other
program which contains a notice placed by the copyright holder or
other authorized party saying it may be distributed under the terms of
this Lesser General Public License (also called "this License").
Each licensee is addressed as "you".
A "library" means a collection of software functions and/or data
prepared so as to be conveniently linked with application programs
(which use some of those functions and data) to form executables.
The "Library", below, refers to any such software library or work
which has been distributed under these terms. A "work based on the
Library" means either the Library or any derivative work under
copyright law: that is to say, a work containing the Library or a
portion of it, either verbatim or with modifications and/or translated
straightforwardly into another language. (Hereinafter, translation is
included without limitation in the term "modification".)
"Source code" for a work means the preferred form of the work for
making modifications to it. For a library, complete source code means
all the source code for all modules it contains, plus any associated
interface definition files, plus the scripts used to control compilation
and installation of the library.
Activities other than copying, distribution and modification are not
covered by this License; they are outside its scope. The act of
running a program using the Library is not restricted, and output from
such a program is covered only if its contents constitute a work based
on the Library (independent of the use of the Library in a tool for
writing it). Whether that is true depends on what the Library does
and what the program that uses the Library does.
1. You may copy and distribute verbatim copies of the Library's
complete source code as you receive it, in any medium, provided that
you conspicuously and appropriately publish on each copy an
appropriate copyright notice and disclaimer of warranty; keep intact
all the notices that refer to this License and to the absence of any
warranty; and distribute a copy of this License along with the
Library.
You may charge a fee for the physical act of transferring a copy,
and you may at your option offer warranty protection in exchange for a
fee.
2. You may modify your copy or copies of the Library or any portion
of it, thus forming a work based on the Library, and copy and
distribute such modifications or work under the terms of Section 1
above, provided that you also meet all of these conditions:
a) The modified work must itself be a software library.
b) You must cause the files modified to carry prominent notices
stating that you changed the files and the date of any change.
c) You must cause the whole of the work to be licensed at no
charge to all third parties under the terms of this License.
d) If a facility in the modified Library refers to a function or a
table of data to be supplied by an application program that uses
the facility, other than as an argument passed when the facility
is invoked, then you must make a good faith effort to ensure that,
in the event an application does not supply such function or
table, the facility still operates, and performs whatever part of
its purpose remains meaningful.
(For example, a function in a library to compute square roots has
a purpose that is entirely well-defined independent of the
application. Therefore, Subsection 2d requires that any
application-supplied function or table used by this function must
be optional: if the application does not supply it, the square
root function must still compute square roots.)
These requirements apply to the modified work as a whole. If
identifiable sections of that work are not derived from the Library,
and can be reasonably considered independent and separate works in
themselves, then this License, and its terms, do not apply to those
sections when you distribute them as separate works. But when you
distribute the same sections as part of a whole which is a work based
on the Library, the distribution of the whole must be on the terms of
this License, whose permissions for other licensees extend to the
entire whole, and thus to each and every part regardless of who wrote
it.
Thus, it is not the intent of this section to claim rights or contest
your rights to work written entirely by you; rather, the intent is to
exercise the right to control the distribution of derivative or
collective works based on the Library.
In addition, mere aggregation of another work not based on the Library
with the Library (or with a work based on the Library) on a volume of
a storage or distribution medium does not bring the other work under
the scope of this License.
3. You may opt to apply the terms of the ordinary GNU General Public
License instead of this License to a given copy of the Library. To do
this, you must alter all the notices that refer to this License, so
that they refer to the ordinary GNU General Public License, version 2,
instead of to this License. (If a newer version than version 2 of the
ordinary GNU General Public License has appeared, then you can specify
that version instead if you wish.) Do not make any other change in
these notices.
Once this change is made in a given copy, it is irreversible for
that copy, so the ordinary GNU General Public License applies to all
subsequent copies and derivative works made from that copy.
This option is useful when you wish to copy part of the code of
the Library into a program that is not a library.
4. You may copy and distribute the Library (or a portion or
derivative of it, under Section 2) in object code or executable form
under the terms of Sections 1 and 2 above provided that you accompany
it with the complete corresponding machine-readable source code, which
must be distributed under the terms of Sections 1 and 2 above on a
medium customarily used for software interchange.
If distribution of object code is made by offering access to copy
from a designated place, then offering equivalent access to copy the
source code from the same place satisfies the requirement to
distribute the source code, even though third parties are not
compelled to copy the source along with the object code.
5. A program that contains no derivative of any portion of the
Library, but is designed to work with the Library by being compiled or
linked with it, is called a "work that uses the Library". Such a
work, in isolation, is not a derivative work of the Library, and
therefore falls outside the scope of this License.
However, linking a "work that uses the Library" with the Library
creates an executable that is a derivative of the Library (because it
contains portions of the Library), rather than a "work that uses the
library". The executable is therefore covered by this License.
Section 6 states terms for distribution of such executables.
When a "work that uses the Library" uses material from a header file
that is part of the Library, the object code for the work may be a
derivative work of the Library even though the source code is not.
Whether this is true is especially significant if the work can be
linked without the Library, or if the work is itself a library. The
threshold for this to be true is not precisely defined by law.
If such an object file uses only numerical parameters, data
structure layouts and accessors, and small macros and small inline
functions (ten lines or less in length), then the use of the object
file is unrestricted, regardless of whether it is legally a derivative
work. (Executables containing this object code plus portions of the
Library will still fall under Section 6.)
Otherwise, if the work is a derivative of the Library, you may
distribute the object code for the work under the terms of Section 6.
Any executables containing that work also fall under Section 6,
whether or not they are linked directly with the Library itself.
6. As an exception to the Sections above, you may also combine or
link a "work that uses the Library" with the Library to produce a
work containing portions of the Library, and distribute that work
under terms of your choice, provided that the terms permit
modification of the work for the customer's own use and reverse
engineering for debugging such modifications.
You must give prominent notice with each copy of the work that the
Library is used in it and that the Library and its use are covered by
this License. You must supply a copy of this License. If the work
during execution displays copyright notices, you must include the
copyright notice for the Library among them, as well as a reference
directing the user to the copy of this License. Also, you must do one
of these things:
a) Accompany the work with the complete corresponding
machine-readable source code for the Library including whatever
changes were used in the work (which must be distributed under
Sections 1 and 2 above); and, if the work is an executable linked
with the Library, with the complete machine-readable "work that
uses the Library", as object code and/or source code, so that the
user can modify the Library and then relink to produce a modified
executable containing the modified Library. (It is understood
that the user who changes the contents of definitions files in the
Library will not necessarily be able to recompile the application
to use the modified definitions.)
b) Use a suitable shared library mechanism for linking with the
Library. A suitable mechanism is one that (1) uses at run time a
copy of the library already present on the user's computer system,
rather than copying library functions into the executable, and (2)
will operate properly with a modified version of the library, if
the user installs one, as long as the modified version is
interface-compatible with the version that the work was made with.
c) Accompany the work with a written offer, valid for at
least three years, to give the same user the materials
specified in Subsection 6a, above, for a charge no more
than the cost of performing this distribution.
d) If distribution of the work is made by offering access to copy
from a designated place, offer equivalent access to copy the above
specified materials from the same place.
e) Verify that the user has already received a copy of these
materials or that you have already sent this user a copy.
For an executable, the required form of the "work that uses the
Library" must include any data and utility programs needed for
reproducing the executable from it. However, as a special exception,
the materials to be distributed need not include anything that is
normally distributed (in either source or binary form) with the major
components (compiler, kernel, and so on) of the operating system on
which the executable runs, unless that component itself accompanies
the executable.
It may happen that this requirement contradicts the license
restrictions of other proprietary libraries that do not normally
accompany the operating system. Such a contradiction means you cannot
use both them and the Library together in an executable that you
distribute.
7. You may place library facilities that are a work based on the
Library side-by-side in a single library together with other library
facilities not covered by this License, and distribute such a combined
library, provided that the separate distribution of the work based on
the Library and of the other library facilities is otherwise
permitted, and provided that you do these two things:
a) Accompany the combined library with a copy of the same work
based on the Library, uncombined with any other library
facilities. This must be distributed under the terms of the
Sections above.
b) Give prominent notice with the combined library of the fact
that part of it is a work based on the Library, and explaining
where to find the accompanying uncombined form of the same work.
8. You may not copy, modify, sublicense, link with, or distribute
the Library except as expressly provided under this License. Any
attempt otherwise to copy, modify, sublicense, link with, or
distribute the Library is void, and will automatically terminate your
rights under this License. However, parties who have received copies,
or rights, from you under this License will not have their licenses
terminated so long as such parties remain in full compliance.
9. You are not required to accept this License, since you have not
signed it. However, nothing else grants you permission to modify or
distribute the Library or its derivative works. These actions are
prohibited by law if you do not accept this License. Therefore, by
modifying or distributing the Library (or any work based on the
Library), you indicate your acceptance of this License to do so, and
all its terms and conditions for copying, distributing or modifying
the Library or works based on it.
10. Each time you redistribute the Library (or any work based on the
Library), the recipient automatically receives a license from the
original licensor to copy, distribute, link with or modify the Library
subject to these terms and conditions. You may not impose any further
restrictions on the recipients' exercise of the rights granted herein.
You are not responsible for enforcing compliance by third parties with
this License.
11. If, as a consequence of a court judgment or allegation of patent
infringement or for any other reason (not limited to patent issues),
conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License. If you cannot
distribute so as to satisfy simultaneously your obligations under this
License and any other pertinent obligations, then as a consequence you
may not distribute the Library at all. For example, if a patent
license would not permit royalty-free redistribution of the Library by
all those who receive copies directly or indirectly through you, then
the only way you could satisfy both it and this License would be to
refrain entirely from distribution of the Library.
If any portion of this section is held invalid or unenforceable under any
particular circumstance, the balance of the section is intended to apply,
and the section as a whole is intended to apply in other circumstances.
It is not the purpose of this section to induce you to infringe any
patents or other property right claims or to contest validity of any
such claims; this section has the sole purpose of protecting the
integrity of the free software distribution system which is
implemented by public license practices. Many people have made
generous contributions to the wide range of software distributed
through that system in reliance on consistent application of that
system; it is up to the author/donor to decide if he or she is willing
to distribute software through any other system and a licensee cannot
impose that choice.
This section is intended to make thoroughly clear what is believed to
be a consequence of the rest of this License.
12. If the distribution and/or use of the Library is restricted in
certain countries either by patents or by copyrighted interfaces, the
original copyright holder who places the Library under this License may add
an explicit geographical distribution limitation excluding those countries,
so that distribution is permitted only in or among countries not thus
excluded. In such case, this License incorporates the limitation as if
written in the body of this License.
13. The Free Software Foundation may publish revised and/or new
versions of the Lesser General Public License from time to time.
Such new versions will be similar in spirit to the present version,
but may differ in detail to address new problems or concerns.
Each version is given a distinguishing version number. If the Library
specifies a version number of this License which applies to it and
"any later version", you have the option of following the terms and
conditions either of that version or of any later version published by
the Free Software Foundation. If the Library does not specify a
license version number, you may choose any version ever published by
the Free Software Foundation.
14. If you wish to incorporate parts of the Library into other free
programs whose distribution conditions are incompatible with these,
write to the author to ask for permission. For software which is
copyrighted by the Free Software Foundation, write to the Free
Software Foundation; we sometimes make exceptions for this. Our
decision will be guided by the two goals of preserving the free status
of all derivatives of our free software and of promoting the sharing
and reuse of software generally.
NO WARRANTY
15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO
WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY
KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
LIBRARY IS WITH YOU. SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME
THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU
FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
DAMAGES.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Libraries
If you develop a new library, and you want it to be of the greatest
possible use to the public, we recommend making it free software that
everyone can redistribute and change. You can do so by permitting
redistribution under these terms (or, alternatively, under the terms of the
ordinary General Public License).
To apply these terms, attach the following notices to the library. It is
safest to attach them to the start of each source file to most effectively
convey the exclusion of warranty; and each file should have at least the
"copyright" line and a pointer to where the full notice is found.
<one line to give the library's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Also add information on how to contact you by electronic and paper mail.
You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the library, if
necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the
library `Frob' (a library for tweaking knobs) written by James Random Hacker.
<signature of Ty Coon>, 1 April 1990
Ty Coon, President of Vice
That's all there is to it!

60
src/main/java/sh/ball/audio/fft/Transform.java
Wyświetl plik

@ -1,60 +0,0 @@
/*
* =================================================
* Copyright 2011 tagtraum industries incorporated
* All rights reserved.
* =================================================
*/
// FROM: https://github.com/hendriks73/jipes/blob/master/src/main/java/com/tagtraum/jipes/math/Transform.java
// LICENSE: https://github.com/hendriks73/jipes/blob/master/LICENSE.txt
// GNU LESSER GENERAL PUBLIC LICENSE Version 2.1, February 1999
package sh.ball.audio.fft;
/**
* Transform that can be obtained for example through a {@link FFTFactory}.
* <p/>
* The forward transform is typically from the time domain to the frequency domain,
* the inverse the other way around. Note that not all methods of this interface are necessarily implemented
* by its implementing classes. Unsupported methods throw {@link UnsupportedOperationException}s.
* <p/>
* Date: 1/15/11
* Time: 8:03 PM
*
* @author <a href="mailto:hs@tagtraum.com">Hendrik Schreiber</a>
*/
public interface Transform {
/**
* Performs transform on real values.
*
* @param real input array of real numbers
* @return array with the real and the imaginary part of the transform, the third float array contains
* the normalized frequencies, i.e. 1.0 is equal to the sample rate of the input
* @throws UnsupportedOperationException should the implementation not support this operation
*/
public float[][] transform(float[] real) throws UnsupportedOperationException;
/**
* Performs a complex transform.
*
* @param real input array of floats
* @param imaginary input array of floats
* @return array with the real and the imaginary part of the transform, the third float array contains
* the normalized frequencies, i.e. 1.0 is equal to the sample rate of the input
* @throws UnsupportedOperationException should the implementation not support this operation
*/
public float[][] transform(float[] real, float[] imaginary) throws UnsupportedOperationException;
/**
* Performs an inverse transform.
*
* @param real input array of floats
* @param imaginary input array of floats
* @return array with the real and the imaginary part of the transform
* @throws UnsupportedOperationException should the implementation not support this operation
*/
public float[][] inverseTransform(float[] real, float[] imaginary) throws UnsupportedOperationException;
}

13
src/main/java/sh/ball/gui/Controller.java
Wyświetl plik

@ -1,5 +1,6 @@
package sh.ball.gui;
import javafx.application.Platform;
import javafx.scene.control.*;
import sh.ball.audio.FrequencyAnalyser;
import sh.ball.audio.FrequencyListener;
@ -62,6 +63,8 @@ public class Controller implements Initializable, FrequencyListener {
private Stage stage;
@FXML
private Label frequencyLabel;
@FXML
private Button chooseFileButton;
@FXML
@ -222,7 +225,9 @@ public class Controller implements Initializable, FrequencyListener {
executor.submit(producer);
new Thread(renderer).start();
new Thread(new FrequencyAnalyser<>(renderer, 2, SAMPLE_RATE)).start();
FrequencyAnalyser<List<Shape>, AudioInputStream> analyser = new FrequencyAnalyser<>(renderer, 2, SAMPLE_RATE);
analyser.addListener(this);
new Thread(analyser).start();
}
private void toggleRecord() {
@ -343,7 +348,9 @@ public class Controller implements Initializable, FrequencyListener {
}
@Override
public void updateFrequency(double frequency) {
public void updateFrequency(double leftFrequency, double rightFrequency) {
Platform.runLater(() ->
frequencyLabel.setText(String.format("L Frequency: %d Hz\nR Frequency: %d Hz", Math.round(leftFrequency), Math.round(rightFrequency)))
);
}
}

15
src/main/resources/fxml/osci-render.fxml
Wyświetl plik

@ -12,7 +12,7 @@
<?import javafx.scene.layout.GridPane?>
<?import javafx.scene.layout.RowConstraints?>
<GridPane alignment="center" hgap="10" prefHeight="765.0" prefWidth="400.0" vgap="10" xmlns="http://javafx.com/javafx/16" xmlns:fx="http://javafx.com/fxml/1">
<GridPane alignment="center" hgap="10" prefHeight="791.0" prefWidth="400.0" vgap="10" xmlns="http://javafx.com/javafx/16" xmlns:fx="http://javafx.com/fxml/1">
<columnConstraints>
<ColumnConstraints />
</columnConstraints>
@ -20,8 +20,8 @@
<RowConstraints />
</rowConstraints>
<AnchorPane prefHeight="874.0" prefWidth="400.0">
<Button fx:id="chooseFileButton" layoutX="8.0" layoutY="24.0" mnemonicParsing="false" prefHeight="26.0" prefWidth="114.0" text="Choose File" />
<SplitPane dividerPositions="0.33168927250308256, 0.6707768187422933" layoutX="6.0" layoutY="107.0" orientation="VERTICAL" prefHeight="650.0" prefWidth="388.0">
<Button fx:id="chooseFileButton" layoutX="8.0" layoutY="10.0" mnemonicParsing="false" prefHeight="26.0" prefWidth="114.0" text="Choose File" />
<SplitPane dividerPositions="0.33168927250308256, 0.6707768187422933" layoutX="6.0" layoutY="135.0" orientation="VERTICAL" prefHeight="650.0" prefWidth="388.0">
<AnchorPane minHeight="0.0" minWidth="0.0">
<Slider fx:id="rotateSpeedSlider" blockIncrement="0.05" layoutX="116.0" layoutY="90.0" majorTickUnit="1.0" max="10.0" prefHeight="38.0" prefWidth="247.0" showTickLabels="true" showTickMarks="true" />
<Label layoutX="37.0" layoutY="88.0" text="Rotate speed" />
@ -29,7 +29,7 @@
<Label layoutX="14.0" layoutY="126.0" text="Translation speed" />
<Slider fx:id="scaleSlider" blockIncrement="0.05" layoutX="116.0" layoutY="167.0" majorTickUnit="1.0" max="10.0" prefHeight="38.0" prefWidth="247.0" showTickLabels="true" showTickMarks="true" value="1.0" />
<Label layoutX="80.0" layoutY="165.0" text="Scale" />
<Label layoutX="70.0" layoutY="50.0" text="Weight" />
<Label layoutX="47.0" layoutY="50.0" text="Line weight" />
<TextField fx:id="translationXTextField" layoutX="136.0" layoutY="13.0" prefHeight="26.0" prefWidth="70.0" text="0" />
<Label layoutX="51.0" layoutY="18.0" text="Translation" />
<Label layoutX="120.0" layoutY="18.0" text="x :" />
@ -70,8 +70,9 @@
</AnchorPane>
</TitledPane>
</SplitPane>
<Label fx:id="fileLabel" layoutX="140.0" layoutY="29.0" maxWidth="250.0" />
<Button fx:id="recordButton" layoutX="8.0" layoutY="68.0" mnemonicParsing="false" prefHeight="26.0" prefWidth="114.0" text="Record" />
<Label fx:id="recordLabel" layoutX="140.0" layoutY="73.0" maxWidth="250.0" />
<Label fx:id="fileLabel" layoutX="140.0" layoutY="15.0" maxWidth="250.0" />
<Button fx:id="recordButton" layoutX="8.0" layoutY="50.0" mnemonicParsing="false" prefHeight="26.0" prefWidth="114.0" text="Record" />
<Label fx:id="recordLabel" layoutX="140.0" layoutY="55.0" maxWidth="250.0" prefWidth="1.0" />
<Label fx:id="frequencyLabel" layoutX="8.0" layoutY="90.0" />
</AnchorPane>
</GridPane>