Implement fixed-point symbols, FFT and file output

1 files changed, 55 insertions, 0 deletions

diff --git a/kiss/kiss_fftndr.h b/kiss/kiss_fftndr.h
new file mode 100644
index 0000000..0d56a1f
--- /dev/null
+++ b/kiss/kiss_fftndr.h
@@ -0,0 +1,55 @@
+/*
+ *  Copyright (c) 2003-2004, Mark Borgerding. All rights reserved.
+ *  This file is part of KISS FFT - https://github.com/mborgerding/kissfft
+ *
+ *  SPDX-License-Identifier: BSD-3-Clause
+ *  See COPYING file for more information.
+ */
+
+#ifndef KISS_NDR_H
+#define KISS_NDR_H
+
+#include "kiss_fft.h"
+#include "kiss_fftr.h"
+#include "kiss_fftnd.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+    
+typedef struct kiss_fftndr_state *kiss_fftndr_cfg;
+
+
+kiss_fftndr_cfg KISS_FFT_API kiss_fftndr_alloc(const int *dims,int ndims,int inverse_fft,void*mem,size_t*lenmem);
+/*
+ dims[0] must be even
+
+ If you don't care to allocate space, use mem = lenmem = NULL 
+*/
+
+
+void KISS_FFT_API kiss_fftndr(
+        kiss_fftndr_cfg cfg,
+        const kiss_fft_scalar *timedata,
+        kiss_fft_cpx *freqdata);
+/*
+ input timedata has dims[0] X dims[1] X ... X  dims[ndims-1] scalar points
+ output freqdata has dims[0] X dims[1] X ... X  dims[ndims-1]/2+1 complex points
+*/
+
+void KISS_FFT_API kiss_fftndri(
+        kiss_fftndr_cfg cfg,
+        const kiss_fft_cpx *freqdata,
+        kiss_fft_scalar *timedata);
+/*
+ input and output dimensions are the exact opposite of kiss_fftndr
+*/
+
+
+#define kiss_fftndr_free free
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif