185 lines
4.6 KiB
C
185 lines
4.6 KiB
C
/* ***** BEGIN LICENSE BLOCK *****
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* Version: RCSL 1.0/RPSL 1.0
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*
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* Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
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*
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* The contents of this file, and the files included with this file, are
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* subject to the current version of the RealNetworks Public Source License
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* Version 1.0 (the "RPSL") available at
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* http://www.helixcommunity.org/content/rpsl unless you have licensed
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* the file under the RealNetworks Community Source License Version 1.0
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* (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,
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* in which case the RCSL will apply. You may also obtain the license terms
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* directly from RealNetworks. You may not use this file except in
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* compliance with the RPSL or, if you have a valid RCSL with RealNetworks
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* applicable to this file, the RCSL. Please see the applicable RPSL or
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* RCSL for the rights, obligations and limitations governing use of the
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* contents of the file.
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*
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* This file is part of the Helix DNA Technology. RealNetworks is the
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* developer of the Original Code and owns the copyrights in the portions
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* it created.
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*
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* This file, and the files included with this file, is distributed and made
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* available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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*
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* Technology Compatibility Kit Test Suite(s) Location:
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* http://www.helixcommunity.org/content/tck
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*
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* Contributor(s):
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*
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* ***** END LICENSE BLOCK ***** */
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/**************************************************************************************
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* Fixed-point MP3 decoder
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* Jon Recker (jrecker@real.com), Ken Cooke (kenc@real.com)
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* June 2003
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*
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* timing.c - implementations of CPU timing functions
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**************************************************************************************/
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#include "timing.h"
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/* NOTES:
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* - for armulator (ARM_ADS) use -clock 100 (100 Hz system clock) for accurate
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* timing since CLOCKS_PER_SEC = 100 (this only works for zero wait-state
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* memory unless you adjust memory timings accordingly)
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* - other option for armulator is to simulate accurate hardware timers (see below)
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*/
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#if (defined (_WIN32) && !defined (_WIN32_WCE)) || defined (ARM_ADS) || (defined (__GNUC__) && defined (ARM))
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#include <time.h>
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int InitTimer(void)
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{
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return 0;
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}
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UINT ReadTimer(void)
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{
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return clock();
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}
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int FreeTimer(void)
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{
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return 0;
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}
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UINT GetClockFrequency(void)
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{
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return CLOCKS_PER_SEC;
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}
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UINT GetClockDivFactor(void)
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{
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return 1;
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}
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UINT CalcTimeDifference(UINT startTime, UINT endTime)
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{
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/* timer counts up on x86, 32-bit counter */
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if (endTime < startTime)
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return (0x7fffffff - (startTime - endTime) );
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else
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return (endTime - startTime);
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}
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#elif defined (_WIN32) && defined (_WIN32_WCE)
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#include <windows.h>
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int InitTimer(void)
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{
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return 0;
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}
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UINT ReadTimer(void)
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{
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return GetTickCount();
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}
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int FreeTimer(void)
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{
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return 0;
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}
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UINT GetClockFrequency(void)
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{
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return 1000;
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}
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UINT GetClockDivFactor(void)
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{
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return 1;
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}
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UINT CalcTimeDifference(UINT startTime, UINT endTime)
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{
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/* timer counts up on x86, 32-bit counter */
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if (endTime < startTime)
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return (0x7fffffff - (startTime - endTime) );
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else
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return (endTime - startTime);
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}
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#elif 0 /* if defined ARM_ADS - this uses simulated high-res hardware timers */
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/* see definitions in ADSv1_2/bin/peripherals.ami */
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#define TIMER_BASE 0x0a800000
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#define TIMER_VALUE_1 (TIMER_BASE + 0x04)
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#define TIMER_CONTROL_1 (TIMER_BASE + 0x08)
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int InitTimer(void)
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{
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volatile unsigned int *timerControl1 = (volatile unsigned int *)TIMER_CONTROL_1;
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unsigned int control1;
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/* see ARMulator Reference, pg 4-78
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* bits [3:2] = clock divisor factor (00 = 1, 01 = 16, 10 = 256, 11 = undef)
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* bit [6] = free-running mode (0) or periodic mode (1)
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* bit [7] = timer disabled (0) or enabled (1)
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*/
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control1 = 0x00000088;
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*timerControl1 = control1;
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return 0;
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}
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UINT ReadTimer(void)
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{
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volatile unsigned int *timerValue1 = (volatile unsigned int *)TIMER_VALUE_1;
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unsigned int value;
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value = *timerValue1 & 0x0000ffff;
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return (UINT)value;
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}
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int FreeTimer(void)
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{
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return 0;
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}
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UINT GetClockFrequency(void)
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{
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return 0;
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}
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UINT GetClockDivFactor(void)
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{
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return 256;
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}
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UINT CalcTimeDifference(UINT startTime, UINT endTime)
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{
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/* timer counts down int ARMulator, 16-bit counter */
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if (endTime > startTime)
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return (startTime + 0x00010000 - endTime);
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else
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return (startTime - endTime);
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}
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#endif
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