1 files changed, 63 insertions, 0 deletions
diff --git a/src/libfaad/cfft.h b/src/libfaad/cfft.h
new file mode 100644
index 000000000..0f2689c69
--- /dev/null
+++ b/src/libfaad/cfft.h
@@ -0,0 +1,63 @@
+/*
+** FAAD - Freeware Advanced Audio Decoder
+** Copyright (C) 2002 M. Bakker
+**  
+** 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+**
+** $Id: cfft.h,v 1.1 2002/08/09 22:36:36 miguelfreitas Exp $
+**/
+
+#ifndef __CFFT_H__
+#define __CFFT_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct
+{
+    real_t *work;
+    real_t *tab;
+    uint16_t ifac[15];
+    uint16_t n;
+} cfft_info;
+
+void cfftf(cfft_info cfft, real_t *c); // complex transform             
+void cfftb(cfft_info cfft, real_t *c); // its inverse                   
+cfft_info cffti(uint16_t n);    // initializer of the above routine pair
+void cfftu(cfft_info cfft);
+
+
+static void passf2(uint16_t ido, uint16_t l1, real_t *cc, real_t *ch,
+                   real_t *wa1, int8_t isign);
+static void passf3(uint16_t ido, uint16_t l1, real_t *cc, real_t *ch,
+                   real_t *wa1, real_t *wa2, int8_t isign);
+static void passf4(uint16_t ido, uint16_t l1, real_t *cc, real_t *ch,
+                   real_t *wa1, real_t *wa2, real_t *wa3, int8_t isign);
+static void passf5(uint16_t ido, uint16_t l1, real_t *cc, real_t *ch,
+                   real_t *wa1, real_t *wa2, real_t *wa3, real_t *wa4,
+                   int8_t isign);
+static void passf(uint16_t *nac, uint16_t ido, uint16_t ip, uint16_t l1,
+                  uint16_t idl1, real_t *cc, real_t *ch, real_t *wa,
+                  int8_t isign);
+INLINE void cfftf1(uint16_t n, real_t *c, real_t *ch, real_t *wa,
+                   uint16_t *ifac, int8_t isign);
+static void cffti1(uint16_t n, real_t *wa, uint16_t *ifac);
+
+
+#ifdef __cplusplus
+}
+#endif
+#endif