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authorMichael Sevakis <jethead71@rockbox.org>2013-04-16 17:47:58 -0400
committerMichael Sevakis <jethead71@rockbox.org>2013-04-26 00:11:04 +0200
commit95e23defb085ee1a846ec2d379368485921d5aee (patch)
tree0bdb31f562fef8c7ff5f3f7dba9c54f9c1e84a76 /firmware/include
parent8829e909b4e756bfb2ad9210eec61d0dc55e1731 (diff)
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Make fixepoint.c as a shared library (libfixedpoint.a).
Change-Id: Icc10d6e85f890c432f191233a4d64e09f00be43d Reviewed-on: http://gerrit.rockbox.org/456 Reviewed-by: Michael Sevakis <jethead71@rockbox.org> Tested-by: Michael Sevakis <jethead71@rockbox.org>
Diffstat (limited to 'firmware/include')
-rw-r--r--firmware/include/fixedpoint.h116
1 files changed, 0 insertions, 116 deletions
diff --git a/firmware/include/fixedpoint.h b/firmware/include/fixedpoint.h
deleted file mode 100644
index 584bd58d84..0000000000
--- a/firmware/include/fixedpoint.h
+++ /dev/null
@@ -1,116 +0,0 @@
-/***************************************************************************
- * __________ __ ___.
- * Open \______ \ ____ ____ | | _\_ |__ _______ ___
- * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
- * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
- * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
- * \/ \/ \/ \/ \/
- * $Id$
- *
- * Copyright (C) 2006 Jens Arnold
- *
- * Fixed point library for plugins
- *
- * 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
- * KIND, either express or implied.
- *
- ****************************************************************************/
-
-/** FIXED POINT MATH ROUTINES - USAGE
- *
- * - x and y arguments are fixed point integers
- * - fracbits is the number of fractional bits in the argument(s)
- * - functions return long fixed point integers with the specified number
- * of fractional bits unless otherwise specified
- *
- * Multiply two fixed point numbers:
- * fp_mul(x, y, fracbits)
- *
- * Divide two fixed point numbers:
- * fp_div(x, y, fracbits)
- *
- * Calculate sin and cos of an angle:
- * fp_sincos(phase, *cos)
- * where phase is a 32 bit unsigned integer with 0 representing 0
- * and 0xFFFFFFFF representing 2*pi, and *cos is the address to
- * a long signed integer. Value returned is a long signed integer
- * from -0x80000000 to 0x7fffffff, representing -1 to 1 respectively.
- * That is, value is a fixed point integer with 31 fractional bits.
- *
- * Take square root of a fixed point number:
- * fp_sqrt(x, fracbits)
- *
- * Take the square root of an integer:
- * isqrt(x)
- *
- * Calculate sin or cos of an angle (very fast, from a table):
- * fp14_sin(angle)
- * fp14_cos(angle)
- * where angle is a non-fixed point integer in degrees. Value
- * returned is a fixed point integer with 14 fractional bits.
- *
- * Calculate the exponential of a fixed point integer
- * fp16_exp(x)
- * where x and the value returned are fixed point integers
- * with 16 fractional bits.
- *
- * Calculate the natural log of a positive fixed point integer
- * fp16_log(x)
- * where x and the value returned are fixed point integers
- * with 16 fractional bits.
- *
- * Calculate decibel equivalent of a gain factor:
- * fp_decibels(factor, fracbits)
- * where fracbits is in the range 12 to 22 (higher is better),
- * and factor is a positive fixed point integer.
- *
- * Calculate factor equivalent of a decibel value:
- * fp_factor(decibels, fracbits)
- * where fracbits is in the range 12 to 22 (lower is better),
- * and decibels is a fixed point integer.
- */
-
-#ifndef FIXEDPOINT_H
-#define FIXEDPOINT_H
-
-#define fp_mul(x, y, z) (long)((((long long)(x)) * ((long long)(y))) >> (z))
-#define fp_div(x, y, z) (long)((((long long)(x)) << (z)) / ((long long)(y)))
-
-long fp_sincos(unsigned long phase, long *cos);
-long fp_sqrt(long a, unsigned int fracbits);
-long fp14_cos(int val);
-long fp14_sin(int val);
-long fp16_log(int x);
-long fp16_exp(int x);
-
-unsigned long isqrt(unsigned long x);
-
-/* fast unsigned multiplication (16x16bit->32bit or 32x32bit->32bit,
- * whichever is faster for the architecture) */
-#ifdef CPU_ARM
-#define FMULU(a, b) ((uint32_t) (((uint32_t) (a)) * ((uint32_t) (b))))
-#else /* SH1, coldfire */
-#define FMULU(a, b) ((uint32_t) (((uint16_t) (a)) * ((uint16_t) (b))))
-#endif
-
-/** MODIFIED FROM replaygain.c */
-#define FP_INF (0x7fffffff)
-#define FP_NEGINF -(0x7fffffff)
-
-/** FIXED POINT EXP10
- * Return 10^x as FP integer. Argument is FP integer.
- */
-long fp_exp10(long x, unsigned int fracbits);
-
-/* fracbits in range 12 - 22 work well. Higher is better for
- * calculating dB, lower is better for calculating factor.
- */
-/* long fp_decibels(unsigned long factor, unsigned int fracbits); */
-long fp_factor(long decibels, unsigned int fracbits);
-
-#endif /* FIXEDPOINT_H */