mirror of https://github.com/xiph/flac
152 lines
4.6 KiB
C
152 lines
4.6 KiB
C
/* libFLAC - Free Lossless Audio Codec library
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* Copyright (C) 2000-2009 Josh Coalson
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* Copyright (C) 2011-2014 Xiph.Org Foundation
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* - Neither the name of the Xiph.org Foundation nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdio.h>
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#include <math.h>
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#include <string.h>
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#include "FLAC/ordinals.h"
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#include "share/compat.h"
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#include "private/bitmath.h"
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#include "private/fixed.h"
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#include "private/macros.h"
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#include "FLAC/assert.h"
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#include "util.h"
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static void FLAC__fixed_compute_residual_shift(const FLAC__int32 data[], unsigned data_len, unsigned order, FLAC__int32 residual[])
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{
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const int idata_len = (int) data_len;
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int i;
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switch(order) {
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case 0:
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FLAC__ASSERT(sizeof(residual[0]) == sizeof(data[0]));
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memcpy(residual, data, sizeof(residual[0])*data_len);
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break;
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case 1:
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for(i = 0; i < idata_len; i++)
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residual[i] = data[i] - data[i-1];
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break;
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case 2:
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for(i = 0; i < idata_len; i++)
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residual[i] = data[i] - (data[i-1] << 1) + data[i-2];
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break;
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case 3:
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for(i = 0; i < idata_len; i++)
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residual[i] = data[i] - (((data[i-1]-data[i-2])<<1) + (data[i-1]-data[i-2])) - data[i-3];
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break;
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case 4:
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for(i = 0; i < idata_len; i++)
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residual[i] = data[i] - ((data[i-1]+data[i-3])<<2) + ((data[i-2]<<2) + (data[i-2]<<1)) + data[i-4];
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break;
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default:
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FLAC__ASSERT(0);
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}
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}
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static void FLAC__fixed_compute_residual_mult(const FLAC__int32 data[], unsigned data_len, unsigned order, FLAC__int32 residual[])
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{
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const int idata_len = (int)data_len;
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int i;
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switch(order) {
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case 0:
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FLAC__ASSERT(sizeof(residual[0]) == sizeof(data[0]));
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memcpy(residual, data, sizeof(residual[0])*data_len);
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break;
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case 1:
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for(i = 0; i < idata_len; i++)
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residual[i] = data[i] - data[i-1];
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break;
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case 2:
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for(i = 0; i < idata_len; i++)
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residual[i] = data[i] - 2*data[i-1] + data[i-2];
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break;
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case 3:
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for(i = 0; i < idata_len; i++)
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residual[i] = data[i] - 3*data[i-1] + 3*data[i-2] - data[i-3];
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break;
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case 4:
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for(i = 0; i < idata_len; i++)
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residual[i] = data[i] - 4*data[i-1] + 6*data[i-2] - 4*data[i-3] + data[i-4];
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break;
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default:
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FLAC__ASSERT(0);
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}
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}
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static FLAC__int32 data [200000] ;
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static FLAC__int32 residual [200000] ;
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static unsigned bench_order = 0 ;
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static void
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bench_shift (void)
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{ FLAC__fixed_compute_residual_shift (data, ARRAY_LEN (data), bench_order, residual) ;
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}
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static void
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bench_mult (void)
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{ FLAC__fixed_compute_residual_mult (data, ARRAY_LEN (data), bench_order, residual) ;
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}
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int
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main (void)
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{ bench_stats stats ;
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puts ("") ;
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for (bench_order = 2 ; bench_order <= 4 ; bench_order ++) {
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memset (&stats, 0, sizeof (stats)) ;
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stats.testfunc = bench_shift ;
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stats.run_count = 100 ;
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stats.loop_count = 10 ;
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benchmark_stats (&stats) ;
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printf ("shift order %u : %f %f %f %f\n", bench_order, stats.min_time, stats.median_time, stats.mean_time, stats.max_time) ;
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memset (&stats, 0, sizeof (stats)) ;
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stats.testfunc = bench_mult ;
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stats.run_count = 100 ;
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stats.loop_count = 10 ;
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benchmark_stats (&stats) ;
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printf ("mult order %u : %f %f %f %f\n\n", bench_order, stats.min_time, stats.median_time, stats.mean_time, stats.max_time) ;
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}
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return 0 ;
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}
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