From f3dbc6f91a0671f916eb7457dd8b759d9bf3e9c8 Mon Sep 17 00:00:00 2001
From: kevin <kevin@larke.org>
Date: Sun, 11 Oct 2020 17:18:58 -0400
Subject: [PATCH] Makefile.am,cwDsp,cwFFT: Updates to make FFTW optional.

---
 Makefile.am | 17 +++++++++++++----
 cwDsp.cpp   |  1 +
 cwDsp.h     | 14 ++++++++------
 cwFFT.cpp   | 18 ++++++++++++++++++
 cwFFT.h     | 40 ++++++++++++++++++++++++++++++++++++++++
 5 files changed, 80 insertions(+), 10 deletions(-)
 create mode 100644 cwFFT.cpp
 create mode 100644 cwFFT.h

diff --git a/Makefile.am b/Makefile.am
index 616ba90..39d898d 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -48,6 +48,12 @@ if cwALSA
 
 libcwHDR += src/libcw/cwMidiPort.h                            src/libcw/cwAudioDeviceAlsa.h                                    
 libcwSRC += src/libcw/cwMidiPort.cpp src/libcw/cwMidiAlsa.cpp src/libcw/cwAudioDeviceAlsa.cpp src/libcw/cwAudioDeviceTest.cpp
+
+if cwWEBSOCK
+libcwHDR += src/libcw/cwIo.h   src/libcw/cwIoTest.h 
+libcwSRC += src/libcw/cwIo.cpp src/libcw/cwIoTest.cpp
+endif
+
 endif
 
 libcwHDR += src/libcw/cwAudioBufDecls.h src/libcw/cwAudioBuf.h
@@ -62,10 +68,6 @@ libcwSRC += src/libcw/cwTcpSocket.cpp src/libcw/cwTcpSocketSrv.cpp src/libcw/cwT
 libcwHDR += src/libcw/cwDsp.h
 libcwSRC += src/libcw/cwDsp.cpp
 
-if cwWEBSOCK
-libcwHDR += src/libcw/cwIo.h   src/libcw/cwIoTest.h 
-libcwSRC += src/libcw/cwIo.cpp src/libcw/cwIoTest.cpp
-endif
 
 libcwHDR += src/libcw/cwMdns.h   src/libcw/cwEuCon.h   src/libcw/cwDnsSd.h   src/libcw/dns_sd/dns_sd.h   src/libcw/dns_sd/dns_sd_print.h   src/libcw/dns_sd/dns_sd_const.h  src/libcw/dns_sd/fader.h     src/libcw/dns_sd/rpt.h
 libcwSRC += src/libcw/cwMdns.cpp src/libcw/cwEuCon.cpp src/libcw/cwDnsSd.cpp src/libcw/dns_sd/dns_sd.cpp src/libcw/dns_sd/dns_sd_print.cpp                                  src/libcw/dns_sd/fader.cpp   src/libcw/dns_sd/rpt.cpp
@@ -76,3 +78,10 @@ else
 # libcwHDR += src/libcw/cwSvg.h    src/libcw/cwDataSets.h
 # libcwSRC += src/libcw/cwSvg.cpp  src/libcw/cwDataSets.cpp
 endif
+
+if cwFFTW
+else
+libcwHDR += src/libcw/cwFFT.h
+libcwSRC += src/libcw/cwFFT.cpp
+endif
+
diff --git a/cwDsp.cpp b/cwDsp.cpp
index 48c08c2..a3ce1d1 100644
--- a/cwDsp.cpp
+++ b/cwDsp.cpp
@@ -142,3 +142,4 @@ cw::rc_t cw::dsp::convolve::test()
 
 // 1.   0.5  0.25 0.1  1.05 0.5  0.25 0.1  1.05 0.5  0.25 0.1  0.05 0.0.   0.  ]
 // 1.0  0.5  0.25 0.1  1.05 0.5  0.25 0.1  1.05 0.5  0.25 0.1  1.05 1.0    0.75 0.
+
diff --git a/cwDsp.h b/cwDsp.h
index 453de25..d4ea593 100644
--- a/cwDsp.h
+++ b/cwDsp.h
@@ -1,7 +1,12 @@
 #ifndef cwDsp_H
 #define cwDsp_H
 
+#ifdef cwFFTW
 #include <fftw3.h>
+#else
+#include "cwFFT.h"
+#endif
+
 #include <type_traits>
 
 namespace cw
@@ -185,7 +190,6 @@ namespace cw
     //---------------------------------------------------------------------------------------------------------------------------------
     // FFT
     //
-    
     namespace fft
     {
 
@@ -264,7 +268,7 @@ namespace cw
           fftw_free(p->cplxV);
         }
 
-        p->u.dplan = nullptr;
+        //p->u.dplan = nullptr;
         mem::release(p->magV);
         mem::release(p->phsV);
         mem::release(p);
@@ -398,7 +402,7 @@ namespace cw
           fftw_free(p->cplxV);
         }
 
-        p->u.dplan = nullptr;
+        //p->u.dplan = nullptr;
         mem::release(p);
         
         return kOkRC;
@@ -576,9 +580,7 @@ namespace cw
       rc_t test();
         
       
-    }
-
-    
+    }    
     
   }
 }
diff --git a/cwFFT.cpp b/cwFFT.cpp
new file mode 100644
index 0000000..ad5bd2b
--- /dev/null
+++ b/cwFFT.cpp
@@ -0,0 +1,18 @@
+#include "cwCommon.h"
+#include "cwLog.h"
+#include "cwCommonImpl.h"
+#include "cwFFT.h"
+
+void*      fftw_malloc(unsigned ) { return nullptr; }
+void       fftw_free(void*){}
+fftw_plan  fftw_plan_dft_r2c_1d(int bufN, double* buf, fftw_complex* cplxV, int type ){ return 0; }
+fftw_plan  fftw_plan_dft_c2r_1d(int bufN, fftw_complex* cplxV, double* outV, int flags ) { return 0; }
+void       fftw_destroy_plan(fftw_plan) {}
+void       fftw_execute( fftw_plan) {}
+
+void*       fftwf_malloc(unsigned ){ return nullptr; }
+void        fftwf_free(void*) {}
+fftwf_plan  fftwf_plan_dft_r2c_1d(int bufN, float* buf, fftwf_complex* cplxV, int type ) { return 0; }
+fftwf_plan  fftwf_plan_dft_c2r_1d(int bufN, fftwf_complex* cplxV, float* outV, int flags ) { return 0; }
+void        fftwf_destroy_plan(fftwf_plan){}
+void        fftwf_execute( fftwf_plan){}
diff --git a/cwFFT.h b/cwFFT.h
new file mode 100644
index 0000000..e09cb75
--- /dev/null
+++ b/cwFFT.h
@@ -0,0 +1,40 @@
+#ifndef cwFFT_H
+#define cwFFT_H
+
+#define FFTW_MEASURE (1)
+#define FFTW_BACKWARD (2)
+/*
+typedef struct fftw_plan_str
+{
+  int foo;
+} fftw_plan;
+*/
+typedef int fftw_plan;
+typedef std::complex<double> fftw_complex;
+  
+void*      fftw_malloc(unsigned );
+void       fftw_free(void*);
+fftw_plan  fftw_plan_dft_r2c_1d(int bufN, double* buf, fftw_complex* cplxV, int flags );
+fftw_plan  fftw_plan_dft_c2r_1d(int bufN, fftw_complex* cplxV, double* outV, int flags );          
+void       fftw_destroy_plan(fftw_plan);
+void       fftw_execute( fftw_plan );
+
+/*
+typedef struct fftwf_plan_str
+{
+  int foo;
+} fftwf_plan;
+*/
+typedef int fftwf_plan;
+
+typedef std::complex<float>  fftwf_complex;
+
+void*       fftwf_malloc(unsigned );
+void        fftwf_free(void*);
+fftwf_plan  fftwf_plan_dft_r2c_1d(int bufN, float* buf, fftwf_complex* cplxV, int flags );
+fftwf_plan  fftwf_plan_dft_c2r_1d(int bufN, fftwf_complex* cplxV, float* outV, int flags );          
+void        fftwf_destroy_plan(fftwf_plan);
+void        fftwf_execute( fftwf_plan );
+  
+
+#endif