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Squashed 'FFTS/Sources/FFTS/' content from commit d11c3e7

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git-subtree-dir: FFTS/Sources/FFTS
git-subtree-split: d11c3e76200e619d35e2d898a28a1c5641a366f4
This commit is contained in:
John K. Luebs
2024-10-25 21:05:50 -05:00
commit 535f02ff99
152 changed files with 88392 additions and 0 deletions
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java/Makefile.am Normal file
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# TODO: the ax_prog_javah thing doesn't work so this
# requires javah in the path
if ENABLE_JNI
JAVA_SRC=$(shell find $(srcdir)/src -name '*.java')
BUILT_SOURCES = nz_ac_waikato_ffts_FFTS.h
all: ffts.jar
classes ffts.jar: $(JAVA_SRC)
-rm -rf classes
mkdir classes
$(JAVAC) -d classes -sourcepath src $(JAVA_SRC)
$(JAR) -cf ffts.jar -C classes .
lib_LTLIBRARIES = libffts_jni.la
libffts_jni_la_SOURCES = jni/ffts_jni.c
nodist_include_HEADERS = nz_ac_waikato_ffts_FFTS.h
libffts_jni_la_LIBADD = $(top_builddir)/src/libffts.la
libffts_jni_la_CFLAGS = @JNI_CPPFLAGS@ $(AM_CFLAGS) -I$(top_srcdir)/include
libffts_jni_la_LDFLAGS = -shared
pkgdata_DATA = ffts.jar
nz_ac_waikato_ffts_FFTS.h: classes
javah -cp $< nz.ac.waikato.ffts.FFTS
CLEANFILES=ffts.jar nz_ac_waikato_ffts_FFTS.h
clean-local:
-rm -rf classes
endif

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-test -z "$(BUILT_SOURCES)" || rm -f $(BUILT_SOURCES)
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dvi: dvi-am
dvi-am:
html: html-am
html-am:
info: info-am
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ps: ps-am
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ctags ctags-am distclean distclean-compile distclean-generic \
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html-am info info-am install install-am install-data \
install-data-am install-dvi install-dvi-am install-exec \
install-exec-am install-html install-html-am install-info \
install-info-am install-libLTLIBRARIES install-man \
install-nodist_includeHEADERS install-pdf install-pdf-am \
install-pkgdataDATA install-ps install-ps-am install-strip \
installcheck installcheck-am installdirs maintainer-clean \
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@ENABLE_JNI_TRUE@all: ffts.jar
@ENABLE_JNI_TRUE@classes ffts.jar: $(JAVA_SRC)
@ENABLE_JNI_TRUE@ -rm -rf classes
@ENABLE_JNI_TRUE@ mkdir classes
@ENABLE_JNI_TRUE@ $(JAVAC) -d classes -sourcepath src $(JAVA_SRC)
@ENABLE_JNI_TRUE@ $(JAR) -cf ffts.jar -C classes .
@ENABLE_JNI_TRUE@nz_ac_waikato_ffts_FFTS.h: classes
@ENABLE_JNI_TRUE@ javah -cp $< nz.ac.waikato.ffts.FFTS
@ENABLE_JNI_TRUE@clean-local:
@ENABLE_JNI_TRUE@ -rm -rf classes
# Tell versions [3.59,3.63) of GNU make to not export all variables.
# Otherwise a system limit (for SysV at least) may be exceeded.
.NOEXPORT:

9
java/android/.classpath Normal file
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@@ -0,0 +1,9 @@
<?xml version="1.0" encoding="UTF-8"?>
<classpath>
<classpathentry kind="src" path="gen"/>
<classpathentry kind="src" path="src"/>
<classpathentry kind="con" path="com.android.ide.eclipse.adt.ANDROID_FRAMEWORK"/>
<classpathentry exported="true" kind="con" path="com.android.ide.eclipse.adt.LIBRARIES"/>
<classpathentry exported="true" kind="con" path="com.android.ide.eclipse.adt.DEPENDENCIES"/>
<classpathentry kind="output" path="bin/classes"/>
</classpath>

40
java/android/.project Normal file
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@@ -0,0 +1,40 @@
<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
<name>ffts-android</name>
<comment></comment>
<projects>
</projects>
<buildSpec>
<buildCommand>
<name>com.android.ide.eclipse.adt.ResourceManagerBuilder</name>
<arguments>
</arguments>
</buildCommand>
<buildCommand>
<name>com.android.ide.eclipse.adt.PreCompilerBuilder</name>
<arguments>
</arguments>
</buildCommand>
<buildCommand>
<name>org.eclipse.jdt.core.javabuilder</name>
<arguments>
</arguments>
</buildCommand>
<buildCommand>
<name>com.android.ide.eclipse.adt.ApkBuilder</name>
<arguments>
</arguments>
</buildCommand>
</buildSpec>
<natures>
<nature>com.android.ide.eclipse.adt.AndroidNature</nature>
<nature>org.eclipse.jdt.core.javanature</nature>
</natures>
<linkedResources>
<link>
<name>src</name>
<type>2</type>
<locationURI>PARENT-1-PROJECT_LOC/src</locationURI>
</link>
</linkedResources>
</projectDescription>

4
java/android/.settings/org.eclipse.jdt.core.prefs Normal file
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@@ -0,0 +1,4 @@
eclipse.preferences.version=1
org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.6
org.eclipse.jdt.core.compiler.compliance=1.6
org.eclipse.jdt.core.compiler.source=1.6

2
java/android/.settings/org.eclipse.ltk.core.refactoring.prefs Normal file
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@@ -0,0 +1,2 @@
eclipse.preferences.version=1
org.eclipse.ltk.core.refactoring.enable.project.refactoring.history=false

7
java/android/AndroidManifest.xml Normal file
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@@ -0,0 +1,7 @@
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="nz.waikato.ffts"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="8" />
</manifest>

18
java/android/ant.properties Normal file
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@@ -0,0 +1,18 @@
# This file is used to override default values used by the Ant build system.
#
# This file must be checked into Version Control Systems, as it is
# integral to the build system of your project.
# This file is only used by the Ant script.
# You can use this to override default values such as
# 'source.dir' for the location of your java source folder and
# 'out.dir' for the location of your output folder.
source.dir=../src
# You can also use it define how the release builds are signed by declaring
# the following properties:
# 'key.store' for the location of your keystore and
# 'key.alias' for the name of the key to use.
# The password will be asked during the build when you use the 'release' target.

92
java/android/build.xml Normal file
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@@ -0,0 +1,92 @@
<?xml version="1.0" encoding="UTF-8"?>
<project name="ffts" default="help">
<!-- The local.properties file is created and updated by the 'android' tool.
It contains the path to the SDK. It should *NOT* be checked into
Version Control Systems. -->
<property file="local.properties" />
<!-- The ant.properties file can be created by you. It is only edited by the
'android' tool to add properties to it.
This is the place to change some Ant specific build properties.
Here are some properties you may want to change/update:
source.dir
The name of the source directory. Default is 'src'.
out.dir
The name of the output directory. Default is 'bin'.
For other overridable properties, look at the beginning of the rules
files in the SDK, at tools/ant/build.xml
Properties related to the SDK location or the project target should
be updated using the 'android' tool with the 'update' action.
This file is an integral part of the build system for your
application and should be checked into Version Control Systems.
-->
<property file="ant.properties" />
<!-- if sdk.dir was not set from one of the property file, then
get it from the ANDROID_HOME env var.
This must be done before we load project.properties since
the proguard config can use sdk.dir -->
<property environment="env" />
<condition property="sdk.dir" value="${env.ANDROID_HOME}">
<isset property="env.ANDROID_HOME" />
</condition>
<!-- The project.properties file is created and updated by the 'android'
tool, as well as ADT.
This contains project specific properties such as project target, and library
dependencies. Lower level build properties are stored in ant.properties
(or in .classpath for Eclipse projects).
This file is an integral part of the build system for your
application and should be checked into Version Control Systems. -->
<loadproperties srcFile="project.properties" />
<!-- quick check on sdk.dir -->
<fail
message="sdk.dir is missing. Make sure to generate local.properties using 'android update project' or to inject it through the ANDROID_HOME environment variable."
unless="sdk.dir"
/>
<!--
Import per project custom build rules if present at the root of the project.
This is the place to put custom intermediary targets such as:
-pre-build
-pre-compile
-post-compile (This is typically used for code obfuscation.
Compiled code location: ${out.classes.absolute.dir}
If this is not done in place, override ${out.dex.input.absolute.dir})
-post-package
-post-build
-pre-clean
-->
<import file="custom_rules.xml" optional="true" />
<!-- Import the actual build file.
To customize existing targets, there are two options:
- Customize only one target:
- copy/paste the target into this file, *before* the
<import> task.
- customize it to your needs.
- Customize the whole content of build.xml
- copy/paste the content of the rules files (minus the top node)
into this file, replacing the <import> task.
- customize to your needs.
***********************
****** IMPORTANT ******
***********************
In all cases you must update the value of version-tag below to read 'custom' instead of an integer,
in order to avoid having your file be overridden by tools such as "android update project"
-->
<!-- version-tag: 1 -->
<import file="${sdk.dir}/tools/ant/build.xml" />
</project>

25
java/android/jni/Android.mk Normal file
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@@ -0,0 +1,25 @@
LOCAL_PATH := $(call my-dir)
TOP=../../..
# Include the shared library
#include $(CLEAR_VARS)
#LOCAL_MODULE := ffts
#LOCAL_SRC_FILES := ../../../src/.libs/libffts.so
#include $(PREBUILT_SHARED_LIBRARY)
# Include the static library in shared lib
include $(CLEAR_VARS)
LOCAL_MODULE := ffts
LOCAL_SRC_FILES := $(TOP)/java/android/bin/lib/libffts.a
LOCAL_EXPORT_C_INCLUDES := $(TOP)/include
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := ffts_jni
LOCAL_CFLAGS := -I$(TOP)/include -I$(TOP)/java/jni -I$(TOP) -Wno-pointer-to-int-cast -Wno-int-to-pointer-cast
LOCAL_SRC_FILES := $(TOP)/java/jni/ffts_jni.c
LOCAL_LDLIBS := -L$(SYSROOT)/usr/lib -llog
LOCAL_STATIC_LIBRARIES := ffts
include $(BUILD_SHARED_LIBRARY)

2
java/android/jni/Application.mk Normal file
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@@ -0,0 +1,2 @@
# requires NEON atm
APP_ABI := armeabi-v7a

20
java/android/proguard-project.txt Normal file
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@@ -0,0 +1,20 @@
# To enable ProGuard in your project, edit project.properties
# to define the proguard.config property as described in that file.
#
# Add project specific ProGuard rules here.
# By default, the flags in this file are appended to flags specified
# in ${sdk.dir}/tools/proguard/proguard-android.txt
# You can edit the include path and order by changing the ProGuard
# include property in project.properties.
#
# For more details, see
# http://developer.android.com/guide/developing/tools/proguard.html
# Add any project specific keep options here:
# If your project uses WebView with JS, uncomment the following
# and specify the fully qualified class name to the JavaScript interface
# class:
#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
# public *;
#}

15
java/android/project.properties Normal file
View File

@@ -0,0 +1,15 @@
# This file is automatically generated by Android Tools.
# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
#
# This file must be checked in Version Control Systems.
#
# To customize properties used by the Ant build system edit
# "ant.properties", and override values to adapt the script to your
# project structure.
#
# To enable ProGuard to shrink and obfuscate your code, uncomment this (available properties: sdk.dir, user.home):
#proguard.config=${sdk.dir}/tools/proguard/proguard-android.txt:proguard-project.txt
android.library=true
# Project target.
target=android-10

237
java/jni/ffts_jni.c Normal file
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@@ -0,0 +1,237 @@
/*
* This file is part of FFTS -- The Fastest Fourier Transform in the South
*
* Copyright (c) 2013, Michael Zucchi <notzed@gmail.com>
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the organization nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL ANTHONY M. BLAKE BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include <ffts.h>
#include <alloca.h>
// Bit of a hack for android, as we can't build the *.h without
// the classes ... but we can't build the project without the jni.
#ifdef ANDROID
#include <jni.h>
#define NEEDS_ALIGNED
#undef HAVE_DECL_POSIX_MEMALIGN
#else
#include "nz_ac_waikato_ffts_FFTS.h"
#endif
// TODO: feature tests instead
#ifdef HAVE_SSE
#define NEEDS_ALIGNED
#endif
#ifdef NEEDS_ALIGNED
#define ALIGN_MASK 15
static void *
xmemalign(size_t align, size_t size) {
#if defined(HAVE_DECL_POSIX_MEMALIGN)
void *r;
if (posix_memalign(&r, align, size) != 0)
return NULL;
return r;
#elif defined(HAVE_DECL_MEMALIGN)
return memalign(align, size);
#else
#error "Require an aligning malloc"
#endif
}
#endif
static void
throwOutOfMemoryError(JNIEnv *env, const char *msg) {
jclass jc = (*env)->FindClass(env, "java/lang/OutOfMemoryError");
if (jc)
(*env)->ThrowNew(env, jc, msg);
}
JNIEXPORT jlong JNICALL Java_nz_ac_waikato_ffts_FFTS_complex_11d
(JNIEnv *env, jclass jc, jint N, jint sign) {
ffts_plan_t *plan;
plan = ffts_init_1d(N, sign);
if (!plan)
throwOutOfMemoryError(env, NULL);
return (jlong)plan;
}
JNIEXPORT jlong JNICALL Java_nz_ac_waikato_ffts_FFTS_complex_12d
(JNIEnv *env, jclass jc, jint N1, jint N2, jint sign) {
ffts_plan_t *plan;
plan = ffts_init_2d(N1, N2, sign);
if (!plan)
throwOutOfMemoryError(env, NULL);
return (jlong)plan;
}
JNIEXPORT jlong JNICALL Java_nz_ac_waikato_ffts_FFTS_complex_1nd
(JNIEnv *env, jclass jc, jintArray jNs, jint sign) {
ffts_plan_t *plan;
int n = (*env)->GetArrayLength(env, jNs);
int *cNs;
size_t *Ns;
int i;
// Needs to convert java int array to size_t array
// Get the int elements and conver to C type
Ns = alloca(sizeof(*Ns) * n);
cNs = alloca(sizeof(int) * n);
(*env)->GetIntArrayRegion(env, jNs, 0, n, cNs);
for (i=0;i<n;i++)
Ns[i] = cNs[i];
plan = ffts_init_nd(n, Ns, sign);
if (!plan)
throwOutOfMemoryError(env, NULL);
return (jlong)plan;
}
JNIEXPORT jlong JNICALL Java_nz_ac_waikato_ffts_FFTS_real_11d
(JNIEnv *env, jclass jc, jint N, jint sign) {
ffts_plan_t *plan;
plan = ffts_init_1d_real(N, sign);
if (!plan)
throwOutOfMemoryError(env, NULL);
return (jlong)plan;
}
JNIEXPORT jlong JNICALL Java_nz_ac_waikato_ffts_FFTS_real_12d
(JNIEnv *env, jclass jc, jint N1, jint N2, jint sign) {
ffts_plan_t *plan;
plan = ffts_init_2d_real(N1, N2, sign);
if (!plan)
throwOutOfMemoryError(env, NULL);
return (jlong)plan;
}
JNIEXPORT jlong JNICALL Java_nz_ac_waikato_ffts_FFTS_real_1nd
(JNIEnv *env, jclass jc, jintArray jNs, jint sign) {
ffts_plan_t *plan;
int n = (*env)->GetArrayLength(env, jNs);
int *cNs;
size_t *Ns;
int i;
// Needs to convert java int array to size_t array
// Get the int elements and conver to C type
Ns = alloca(sizeof(*Ns) * n);
cNs = alloca(sizeof(int) * n);
(*env)->GetIntArrayRegion(env, jNs, 0, n, cNs);
for (i=0;i<n;i++)
Ns[i] = cNs[i];
plan = ffts_init_nd_real(n, Ns, sign);
if (!plan)
throwOutOfMemoryError(env, NULL);
return (jlong)plan;
}
JNIEXPORT void JNICALL Java_nz_ac_waikato_ffts_FFTS_execute__JJ_3FI_3FI
(JNIEnv *env, jclass jc, jlong p, jlong size, jfloatArray jsrc, jint soff, jfloatArray jdst, jint doff) {
ffts_plan_t *plan = (ffts_plan_t *)p;
// TODO: check performance on android/arm
#ifdef NEEDS_ALIGNED
// On oracle jvm this is faster than GetFloatArrayElements()
void *src, *dst;
src = xmemalign(64, size * 4);
if (!src) {
throwOutOfMemoryError(env, NULL);
return;
}
dst = xmemalign(64, size * 4);
if (!dst) {
free(src);
throwOutOfMemoryError(env, NULL);
return;
}
(*env)->GetFloatArrayRegion(env, jsrc, 0, size, src + soff);
ffts_execute(plan, src, dst);
(*env)->SetFloatArrayRegion(env, jdst, 0, size, dst + doff);
free(dst);
free(src);
#else
// This is the fastest with oracle jvm, but doesn't work with sse ...
void *src = (*env)->GetPrimitiveArrayCritical(env, jsrc, NULL);
void *dst = (*env)->GetPrimitiveArrayCritical(env, jdst, NULL);
ffts_execute(plan, src + soff, dst + doff);
(*env)->ReleasePrimitiveArrayCritical(env, jdst, dst, 0);
(*env)->ReleasePrimitiveArrayCritical(env, jsrc, src, 0);
#endif
#if 0
// This is the slowest
void *src = (*env)->GetFloatArrayElements(env, jsrc, NULL);
void *dst = (*env)->GetFloatArrayElements(env, jdst, NULL);
ffts_execute(plan, src + soff, dst + doff);
(*env)->ReleaseFloatArrayElements(env, jdst, dst, 0);
(*env)->ReleaseFloatArrayElements(env, jsrc, src, 0);
#endif
}
JNIEXPORT void JNICALL Java_nz_ac_waikato_ffts_FFTS_execute__JJLjava_nio_FloatBuffer_2Ljava_nio_FloatBuffer_2
(JNIEnv *env, jclass jc, jlong p, jlong size, jobject jsrc, jobject jdst) {
ffts_plan_t *plan = (ffts_plan_t *)p;
void *src = (*env)->GetDirectBufferAddress(env, jsrc);
void *dst = (*env)->GetDirectBufferAddress(env, jdst);
// Bounds checking etc is in java side.
ffts_execute(plan, src, dst);
}
JNIEXPORT void JNICALL Java_nz_ac_waikato_ffts_FFTS_free
(JNIEnv *env, jclass jc, jlong p) {
ffts_plan_t *plan = (ffts_plan_t *)p;
ffts_free(plan);
}
// vim: set autoindent noexpandtab tabstop=3 shiftwidth=3:

203
java/src/nz/ac/waikato/ffts/FFTS.java Normal file
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@@ -0,0 +1,203 @@
/*
* This file is part of FFTS -- The Fastest Fourier Transform in the South
*
* Copyright (c) 2013, Michael Zucchi <notzed@gmail.com>
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the organization nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL ANTHONY M. BLAKE BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package nz.ac.waikato.ffts;
import java.nio.FloatBuffer;
/**
* A java wrapper for ffts plans.
*
* Plans must currently be freed explicitly.
*
* @author notzed
*/
public class FFTS {
/**
* C pointer
*/
private long p;
/**
* Minimum size of input
*/
final protected long inSize;
/**
* Minimum size of output
*/
final protected long outSize;
private FFTS(long p, long inSize) {
this(p, inSize, inSize);
}
private FFTS(long p, long inSize, long outSize) {
this.p = p;
this.inSize = inSize;
this.outSize = inSize;
}
/**
* The sign to use for a forward transform.
*/
public static final int FORWARD = -1;
/**
* The sign to use for a backward transform.
*/
public static final int BACKWARD = 1;
/**
* Create a FFT plan for a 1-dimensional complex transform.
*
* The src and dst parameters to execute() use complex data.
*
* @param sign The direction of the transform.
* @param N The size of the transform.
* @return
*/
public static FFTS complex(int sign, int N) {
return new FFTS(complex_1d(N, sign), N * 2);
}
/**
* Create a FFT plan for a 2-dimensional complex transform.
* @param sign The direction of the transform.
* @param N1 The size of the transform.
* @param N2 The size of the transform.
* @return
*/
public static FFTS complex(int sign, int N1, int N2) {
return new FFTS(complex_2d(N1, N2, sign), N1 * N2 * 2);
}
public static FFTS complex(int sign, int... Ns) {
return new FFTS(complex_nd(Ns, sign), size(Ns) * 2);
}
public static FFTS real(int sign, int N) {
return new FFTS(real_1d(N, sign), sign == FORWARD ? N : (N / 2 + 1) * 2, sign == FORWARD ? (N / 2 + 1) * 2 : N);
}
public static FFTS real(int sign, int N1, int N2) {
return new FFTS(real_2d(N1, N2, sign), sign == FORWARD ? N1 * N2 : (N1 * N2 / 2 + 1) * 2, sign == FORWARD ? (N1 * N2 / 2 + 1) * 2 : N1 * N2);
}
public static FFTS real(int sign, int... Ns) {
return new FFTS(real_nd(Ns, sign), sign == FORWARD ? size(Ns) : (size(Ns) / 2 + 1) * 2, sign == FORWARD ? (size(Ns) / 2 + 1) * 2 : size(Ns));
}
/**
* Execute this plan with the given array data.
*
* @param src
* @param dst
*/
public void execute(float[] src, float[] dst) {
execute(src, 0, dst, 0);
}
/**
* Execute this plan with the given array data.
* @param src
* @param soff Start offset into src array.
* @param dst
* @param doff Start offset into dst array.
*/
public void execute(float[] src, int soff, float[] dst, int doff) {
if (src.length - soff < inSize || dst.length - doff < outSize)
throw new ArrayIndexOutOfBoundsException();
if (p == 0)
throw new NullPointerException();
execute(p, inSize, src, soff, dst, doff);
}
/**
* Execute this plan with the given nio buffers. The bufffers
* must be derived from direct buffers.
*
* The buffer position and limits are ignored.
*
* @param src
* @param dst
*/
public void execute(FloatBuffer src, FloatBuffer dst) {
if (src.capacity() < inSize || dst.capacity() < outSize)
throw new ArrayIndexOutOfBoundsException();
if (p == 0)
throw new NullPointerException();
execute(p, inSize, src, dst);
}
/**
* Free the plan.
*/
public void free() {
if (p == 0)
throw new NullPointerException();
free(p);
}
/*
* Calculate the number of elements required to store one
* set of n-dimensional data.
*/
protected static long size(int[] Ns) {
long s = Ns[0];
for (int i = 1; i < Ns.length; i++)
s *= Ns[i];
return s;
}
static {
System.loadLibrary("ffts_jni");
}
/*
* Native interface
*/
protected static native long complex_1d(int N, int sign);
protected static native long complex_2d(int N1, int N2, int sign);
protected static native long complex_nd(int[] Ns, int sign);
protected static native long real_1d(int N, int sign);
protected static native long real_2d(int N1, int N2, int sign);
protected static native long real_nd(int[] Ns, int sign);
protected static native void execute(long p, long size, float[] src, int soff, float[] dst, int doff);
protected static native void execute(long p, long size, FloatBuffer src, FloatBuffer dst);
protected static native void free(long p);
}