1 files changed, 265 insertions, 0 deletions

diff --git a/apps/codecs/libfaad/fixed.h b/apps/codecs/libfaad/fixed.h
new file mode 100644
index 0000000000..ac916ba0b9
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+++ b/apps/codecs/libfaad/fixed.h
@@ -0,0 +1,265 @@
+/*
+** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
+** Copyright (C) 2003-2004 M. Bakker, Ahead Software AG, http://www.nero.com
+**  
+** 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.
+**
+** Any non-GPL usage of this software or parts of this software is strictly
+** forbidden.
+**
+** Commercial non-GPL licensing of this software is possible.
+** For more info contact Ahead Software through Mpeg4AAClicense@nero.com.
+**
+** $Id$
+**/
+
+#ifndef __FIXED_H__
+#define __FIXED_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if defined(_WIN32_WCE) && defined(_ARM_)
+#include <cmnintrin.h>
+#endif
+
+#define COEF_BITS 28
+#define COEF_PRECISION (1 << COEF_BITS)
+#define REAL_BITS 14 // MAXIMUM OF 14 FOR FIXED POINT SBR
+#define REAL_PRECISION (1 << REAL_BITS)
+
+/* FRAC is the fractional only part of the fixed point number [0.0..1.0) */
+#define FRAC_SIZE 32 /* frac is a 32 bit integer */
+#define FRAC_BITS 31
+#define FRAC_PRECISION ((uint32_t)(1 << FRAC_BITS))
+#define FRAC_MAX 0x7FFFFFFF
+
+typedef int32_t real_t;
+
+
+#define REAL_CONST(A) (((A) >= 0) ? ((real_t)((A)*(REAL_PRECISION)+0.5)) : ((real_t)((A)*(REAL_PRECISION)-0.5)))
+#define COEF_CONST(A) (((A) >= 0) ? ((real_t)((A)*(COEF_PRECISION)+0.5)) : ((real_t)((A)*(COEF_PRECISION)-0.5)))
+#define FRAC_CONST(A) (((A) == 1.00) ? ((real_t)FRAC_MAX) : (((A) >= 0) ? ((real_t)((A)*(FRAC_PRECISION)+0.5)) : ((real_t)((A)*(FRAC_PRECISION)-0.5))))
+//#define FRAC_CONST(A) (((A) >= 0) ? ((real_t)((A)*(FRAC_PRECISION)+0.5)) : ((real_t)((A)*(FRAC_PRECISION)-0.5)))
+
+#define Q2_BITS 22
+#define Q2_PRECISION (1 << Q2_BITS)
+#define Q2_CONST(A) (((A) >= 0) ? ((real_t)((A)*(Q2_PRECISION)+0.5)) : ((real_t)((A)*(Q2_PRECISION)-0.5)))
+
+#if defined(_WIN32) && !defined(_WIN32_WCE)
+
+/* multiply with real shift */
+static INLINE real_t MUL_R(real_t A, real_t B)
+{
+    _asm {
+        mov eax,A
+        imul B
+        shrd eax,edx,REAL_BITS
+    }
+}
+
+/* multiply with coef shift */
+static INLINE real_t MUL_C(real_t A, real_t B)
+{
+    _asm {
+        mov eax,A
+        imul B
+        shrd eax,edx,COEF_BITS
+    }
+}
+
+static INLINE real_t MUL_Q2(real_t A, real_t B)
+{
+    _asm {
+        mov eax,A
+        imul B
+        shrd eax,edx,Q2_BITS
+    }
+}
+
+static INLINE real_t MUL_SHIFT6(real_t A, real_t B)
+{
+    _asm {
+        mov eax,A
+        imul B
+        shrd eax,edx,6
+    }
+}
+
+static INLINE real_t MUL_SHIFT23(real_t A, real_t B)
+{
+    _asm {
+        mov eax,A
+        imul B
+        shrd eax,edx,23
+    }
+}
+
+#if 1
+static INLINE real_t _MulHigh(real_t A, real_t B)
+{
+    _asm {
+        mov eax,A
+        imul B
+        mov eax,edx
+    }
+}
+
+/* multiply with fractional shift */
+static INLINE real_t MUL_F(real_t A, real_t B)
+{
+    return _MulHigh(A,B) << (FRAC_SIZE-FRAC_BITS);
+}
+
+/* Complex multiplication */
+static INLINE void ComplexMult(real_t *y1, real_t *y2,
+    real_t x1, real_t x2, real_t c1, real_t c2)
+{
+    *y1 = (_MulHigh(x1, c1) + _MulHigh(x2, c2))<<(FRAC_SIZE-FRAC_BITS);
+    *y2 = (_MulHigh(x2, c1) - _MulHigh(x1, c2))<<(FRAC_SIZE-FRAC_BITS);
+}
+#else
+static INLINE real_t MUL_F(real_t A, real_t B)
+{
+    _asm {
+        mov eax,A
+        imul B
+        shrd eax,edx,FRAC_BITS
+    }
+}
+
+/* Complex multiplication */
+static INLINE void ComplexMult(real_t *y1, real_t *y2,
+    real_t x1, real_t x2, real_t c1, real_t c2)
+{
+    *y1 = MUL_F(x1, c1) + MUL_F(x2, c2);
+    *y2 = MUL_F(x2, c1) - MUL_F(x1, c2);
+}
+#endif
+
+#elif defined(__GNUC__) && defined (__arm__)
+
+/* taken from MAD */
+#define arm_mul(x, y, SCALEBITS) \
+({ \
+    uint32_t __hi; \
+    uint32_t __lo; \
+    uint32_t __result; \
+    asm("smull  %0, %1, %3, %4\n\t" \
+        "movs   %0, %0, lsr %5\n\t" \
+        "adc    %2, %0, %1, lsl %6" \
+        : "=&r" (__lo), "=&r" (__hi), "=r" (__result) \
+        : "%r" (x), "r" (y), \
+        "M" (SCALEBITS), "M" (32 - (SCALEBITS)) \
+        : "cc"); \
+        __result; \
+})
+
+static INLINE real_t MUL_R(real_t A, real_t B)
+{
+    return arm_mul(A, B, REAL_BITS);
+}
+
+static INLINE real_t MUL_C(real_t A, real_t B)
+{
+    return arm_mul(A, B, COEF_BITS);
+}
+
+static INLINE real_t MUL_Q2(real_t A, real_t B)
+{
+    return arm_mul(A, B, Q2_BITS);
+}
+
+static INLINE real_t MUL_SHIFT6(real_t A, real_t B)
+{
+    return arm_mul(A, B, 6);
+}
+
+static INLINE real_t MUL_SHIFT23(real_t A, real_t B)
+{
+    return arm_mul(A, B, 23);
+}
+
+static INLINE real_t _MulHigh(real_t x, real_t y)
+{
+    uint32_t __lo;
+    uint32_t __hi;
+    asm("smull\t%0, %1, %2, %3"
+        : "=&r"(__lo),"=&r"(__hi)
+        : "%r"(x),"r"(y)
+        : "cc");
+    return __hi;
+}
+
+static INLINE real_t MUL_F(real_t A, real_t B)
+{
+    return _MulHigh(A, B) << (FRAC_SIZE-FRAC_BITS);
+}
+
+/* Complex multiplication */
+static INLINE void ComplexMult(real_t *y1, real_t *y2,
+    real_t x1, real_t x2, real_t c1, real_t c2)
+{
+    int32_t tmp, yt1, yt2;
+    asm("smull %0, %1, %4, %6\n\t"
+        "smlal %0, %1, %5, %7\n\t"
+        "rsb   %3, %4, #0\n\t"
+        "smull %0, %2, %5, %6\n\t"
+        "smlal %0, %2, %3, %7"
+        : "=&r" (tmp), "=&r" (yt1), "=&r" (yt2), "=r" (x1)
+        : "3" (x1), "r" (x2), "r" (c1), "r" (c2)
+        : "cc" );
+    *y1 = yt1 << (FRAC_SIZE-FRAC_BITS);
+    *y2 = yt2 << (FRAC_SIZE-FRAC_BITS);
+}
+
+#else
+
+  /* multiply with real shift */
+  #define MUL_R(A,B) (real_t)(((int64_t)(A)*(int64_t)(B)+(1 << (REAL_BITS-1))) >> REAL_BITS)
+  /* multiply with coef shift */
+  #define MUL_C(A,B) (real_t)(((int64_t)(A)*(int64_t)(B)+(1 << (COEF_BITS-1))) >> COEF_BITS)
+  /* multiply with fractional shift */
+#if defined(_WIN32_WCE) && defined(_ARM_)
+  /* eVC for PocketPC has an intrinsic function that returns only the high 32 bits of a 32x32 bit multiply */
+  static INLINE real_t MUL_F(real_t A, real_t B)
+  {
+      return _MulHigh(A,B) << (32-FRAC_BITS);
+  }
+#else
+  #define _MulHigh(A,B) (real_t)(((int64_t)(A)*(int64_t)(B)+(1 << (FRAC_SIZE-1))) >> FRAC_SIZE)
+  #define MUL_F(A,B) (real_t)(((int64_t)(A)*(int64_t)(B)+(1 << (FRAC_BITS-1))) >> FRAC_BITS)
+#endif
+  #define MUL_Q2(A,B) (real_t)(((int64_t)(A)*(int64_t)(B)+(1 << (Q2_BITS-1))) >> Q2_BITS)
+  #define MUL_SHIFT6(A,B) (real_t)(((int64_t)(A)*(int64_t)(B)+(1 << (6-1))) >> 6)
+  #define MUL_SHIFT23(A,B) (real_t)(((int64_t)(A)*(int64_t)(B)+(1 << (23-1))) >> 23)
+
+/* Complex multiplication */
+static INLINE void ComplexMult(real_t *y1, real_t *y2,
+    real_t x1, real_t x2, real_t c1, real_t c2)
+{
+    *y1 = (_MulHigh(x1, c1) + _MulHigh(x2, c2))<<(FRAC_SIZE-FRAC_BITS);
+    *y2 = (_MulHigh(x2, c1) - _MulHigh(x1, c2))<<(FRAC_SIZE-FRAC_BITS);
+}
+
+#endif
+
+
+
+#ifdef __cplusplus
+}
+#endif
+#endif