forked from Mirrors/freeswitch
0f27549c48
git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@7544 d0543943-73ff-0310-b7d9-9358b9ac24b2
240 lines
7.3 KiB
C
240 lines
7.3 KiB
C
/*
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* VoIPcodecs - a series of DSP components for telephony
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*
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* oki_adpcm_tests.c - Test the Oki (Dialogic) ADPCM encode and decode
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* software at 24kbps and 32kbps.
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*
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* Written by Steve Underwood <steveu@coppice.org>
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*
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* Copyright (C) 2004 Steve Underwood
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2, as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* $Id: oki_adpcm_tests.c,v 1.24 2007/11/10 11:14:58 steveu Exp $
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*/
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/*! \file */
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/*! \page oki_adpcm_tests_page OKI (Dialogic) ADPCM tests
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\section oki_adpcm_tests_page_sec_1 What does it do?
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To perform a general audio quality test, oki_adpcm_tests should be run. The test file
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../localtests/short_nb_voice.wav will be compressed to the specified bit rate,
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decompressed, and the resulting audio stored in post_oki_adpcm.wav. A simple SNR test
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is automatically performed. Listening tests may be used for a more detailed evaluation
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of the degradation in quality caused by the compression. Both 32k bps and 24k bps
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compression may be tested.
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\section oki_adpcm_tests_page_sec_2 How is it used?
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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 <stdlib.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <string.h>
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#include <time.h>
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#include <audiofile.h>
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#include "voipcodecs.h"
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#define IN_FILE_NAME "../localtests/short_nb_voice.wav"
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#define OUT_FILE_NAME "post_oki_adpcm.wav"
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#define HIST_LEN 1000
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int main(int argc, char *argv[])
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{
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int i;
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AFfilehandle inhandle;
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AFfilehandle outhandle;
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AFfilesetup filesetup;
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int frames;
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int dec_frames;
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int outframes;
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int oki_bytes;
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int bit_rate;
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float x;
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double pre_energy;
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double post_energy;
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double diff_energy;
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int16_t pre_amp[HIST_LEN];
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int16_t post_amp[HIST_LEN];
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uint8_t oki_data[HIST_LEN];
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int16_t history[HIST_LEN];
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int hist_in;
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int hist_out;
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oki_adpcm_state_t *oki_enc_state;
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oki_adpcm_state_t *oki_dec_state;
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int xx;
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int total_pre_samples;
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int total_compressed_bytes;
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int total_post_samples;
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const char *in_file_name;
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bit_rate = 32000;
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in_file_name = IN_FILE_NAME;
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for (i = 1; i < argc; i++)
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{
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if (strcmp(argv[i], "-2") == 0)
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{
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bit_rate = 24000;
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continue;
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}
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if (strcmp(argv[i], "-i") == 0)
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{
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in_file_name = argv[++i];
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continue;
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}
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fprintf(stderr, "Unknown parameter %s specified.\n", argv[i]);
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exit(2);
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}
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if ((inhandle = afOpenFile(in_file_name, "r", 0)) == AF_NULL_FILEHANDLE)
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{
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printf(" Cannot open wave file '%s'\n", in_file_name);
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exit(2);
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}
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if ((x = afGetFrameSize(inhandle, AF_DEFAULT_TRACK, 1)) != 2.0)
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{
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printf(" Unexpected frame size in wave file '%s'\n", in_file_name);
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exit(2);
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}
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if ((x = afGetRate(inhandle, AF_DEFAULT_TRACK)) != (float) SAMPLE_RATE)
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{
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printf(" Unexpected sample rate in wave file '%s'\n", in_file_name);
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exit(2);
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}
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if ((x = afGetChannels(inhandle, AF_DEFAULT_TRACK)) != 1.0)
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{
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printf(" Unexpected number of channels in wave file '%s'\n", in_file_name);
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exit(2);
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}
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if ((filesetup = afNewFileSetup()) == AF_NULL_FILESETUP)
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{
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fprintf(stderr, " Failed to create file setup\n");
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exit(2);
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}
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afInitSampleFormat(filesetup, AF_DEFAULT_TRACK, AF_SAMPFMT_TWOSCOMP, 16);
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afInitRate(filesetup, AF_DEFAULT_TRACK, (float) SAMPLE_RATE);
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afInitFileFormat(filesetup, AF_FILE_WAVE);
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afInitChannels(filesetup, AF_DEFAULT_TRACK, 1);
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outhandle = afOpenFile(OUT_FILE_NAME, "w", filesetup);
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if (outhandle == AF_NULL_FILEHANDLE)
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{
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fprintf(stderr, " Cannot create wave file '%s'\n", OUT_FILE_NAME);
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exit(2);
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}
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if ((oki_enc_state = oki_adpcm_init(NULL, bit_rate)) == NULL)
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{
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fprintf(stderr, " Cannot create encoder\n");
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exit(2);
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}
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if ((oki_dec_state = oki_adpcm_init(NULL, bit_rate)) == NULL)
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{
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fprintf(stderr, " Cannot create decoder\n");
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exit(2);
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}
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hist_in = 0;
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if (bit_rate == 32000)
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hist_out = 0;
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else
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hist_out = HIST_LEN - 27;
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memset(history, 0, sizeof(history));
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pre_energy = 0.0;
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post_energy = 0.0;
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diff_energy = 0.0;
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total_pre_samples = 0;
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total_compressed_bytes = 0;
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total_post_samples = 0;
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while ((frames = afReadFrames(inhandle, AF_DEFAULT_TRACK, pre_amp, 159)))
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{
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total_pre_samples +=frames;
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oki_bytes = oki_adpcm_encode(oki_enc_state, oki_data, pre_amp, frames);
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total_compressed_bytes += oki_bytes;
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dec_frames = oki_adpcm_decode(oki_dec_state, post_amp, oki_data, oki_bytes);
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total_post_samples += dec_frames;
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for (i = 0; i < frames; i++)
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{
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history[hist_in++] = pre_amp[i];
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if (hist_in >= HIST_LEN)
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hist_in = 0;
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pre_energy += (double) pre_amp[i] * (double) pre_amp[i];
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}
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for (i = 0; i < dec_frames; i++)
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{
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post_energy += (double) post_amp[i] * (double) post_amp[i];
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xx = post_amp[i] - history[hist_out++];
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if (hist_out >= HIST_LEN)
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hist_out = 0;
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diff_energy += (double) xx * (double) xx;
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//post_amp[i] = xx;
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}
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outframes = afWriteFrames(outhandle, AF_DEFAULT_TRACK, post_amp, dec_frames);
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}
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if (afCloseFile(inhandle) != 0)
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{
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printf(" Cannot close wave file '%s'\n", in_file_name);
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exit(2);
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}
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if (afCloseFile(outhandle) != 0)
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{
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printf(" Cannot close wave file '%s'\n", OUT_FILE_NAME);
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exit(2);
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}
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afFreeFileSetup(filesetup);
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oki_adpcm_release(oki_enc_state);
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oki_adpcm_release(oki_dec_state);
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printf("Pre samples: %d\n", total_pre_samples);
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printf("Compressed bytes: %d\n", total_compressed_bytes);
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printf("Post samples: %d\n", total_post_samples);
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printf("Output energy is %f%% of input energy.\n", 100.0*post_energy/pre_energy);
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printf("Residual energy is %f%% of the total.\n", 100.0*diff_energy/post_energy);
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if (bit_rate == 32000)
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{
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if (fabs(1.0 - post_energy/pre_energy) > 0.05
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fabs(diff_energy/post_energy) > 0.03)
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{
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printf("Tests failed.\n");
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exit(2);
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}
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}
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else
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{
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if (fabs(1.0 - post_energy/pre_energy) > 0.20
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fabs(diff_energy/post_energy) > 0.10)
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{
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printf("Tests failed.\n");
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exit(2);
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}
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}
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printf("Tests passed.\n");
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return 0;
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}
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/*- End of function --------------------------------------------------------*/
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/*- End of file ------------------------------------------------------------*/
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