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5
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1 /*
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2 * SpanDSP - a series of DSP components for telephony
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3 *
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4 * ima_adpcm_tests.c - Test the IMA/DVI/Intel ADPCM encode and decode
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5 * software.
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6 *
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7 * Written by Steve Underwood <steveu@coppice.org>
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8 *
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9 * Copyright (C) 2004 Steve Underwood
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10 *
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11 * All rights reserved.
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12 *
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13 * This program is free software; you can redistribute it and/or modify
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14 * it under the terms of the GNU General Public License version 2, as
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15 * published by the Free Software Foundation.
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16 *
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17 * This program is distributed in the hope that it will be useful,
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18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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20 * GNU General Public License for more details.
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21 *
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22 * You should have received a copy of the GNU General Public License
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23 * along with this program; if not, write to the Free Software
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24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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25 *
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26 * $Id: ima_adpcm_tests.c,v 1.22 2006/11/19 14:07:27 steveu Exp $
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27 */
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28
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29 /*! \file */
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30
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31 /*! \page ima_adpcm_tests_page IMA ADPCM tests
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32 \section ima_adpcm_tests_page_sec_1 What does it do?
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33 To perform a general audio quality test, ima_adpcm_tests should be run. The test file
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34 ../localtests/short_nb_voice.wav will be compressed to the specified bit rate,
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35 decompressed, and the resulting audio stored in post_ima_adpcm.wav. A simple SNR test
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36 is automatically performed. Listening tests may be used for a more detailed evaluation
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37 of the degradation in quality caused by the compression.
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38
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39 \section ima_adpcm_tests_page_sec_2 How is it used?
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40 */
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41
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42 #ifdef HAVE_CONFIG_H
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43 #include "config.h"
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44 #endif
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45
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46 #include <stdlib.h>
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47 #include <inttypes.h>
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48 #include <string.h>
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49 #if defined(HAVE_TGMATH_H)
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50 #include <tgmath.h>
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51 #endif
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52 #if defined(HAVE_MATH_H)
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53 #include <math.h>
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54 #endif
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55 #include <stdio.h>
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56 #include <time.h>
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57 #include <fcntl.h>
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58 #include <audiofile.h>
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59 #include <tiffio.h>
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60
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61 #include "spandsp.h"
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62
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63 #define IN_FILE_NAME "../localtests/short_nb_voice.wav"
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64 #define OUT_FILE_NAME "post_ima_adpcm.wav"
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65
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66 #define HIST_LEN 1000
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67
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68 int main(int argc, char *argv[])
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69 {
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70 int i;
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71 AFfilehandle inhandle;
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72 AFfilehandle outhandle;
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73 AFfilesetup filesetup;
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74 int frames;
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75 int dec_frames;
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76 int outframes;
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77 int ima_bytes;
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78 float x;
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79 double pre_energy;
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80 double post_energy;
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81 double diff_energy;
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82 int16_t pre_amp[HIST_LEN];
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83 int16_t post_amp[HIST_LEN];
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84 uint8_t ima_data[HIST_LEN];
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85 int16_t history[HIST_LEN];
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86 int hist_in;
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87 int hist_out;
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88 ima_adpcm_state_t *ima_enc_state;
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89 ima_adpcm_state_t *ima_dec_state;
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90 int xx;
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91 int vbr;
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92 const char *in_file_name;
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93
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94 vbr = FALSE;
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95 in_file_name = IN_FILE_NAME;
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96 for (i = 1; i < argc; i++)
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97 {
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98 if (strcmp(argv[i], "-v") == 0)
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99 {
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100 vbr = TRUE;
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101 continue;
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102 }
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103 if (strcmp(argv[i], "-i") == 0)
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104 {
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105 in_file_name = argv[++i];
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106 continue;
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107 }
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108 fprintf(stderr, "Unknown parameter %s specified.\n", argv[i]);
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109 exit(2);
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110 }
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111
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112 if ((inhandle = afOpenFile(in_file_name, "r", 0)) == AF_NULL_FILEHANDLE)
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113 {
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114 printf(" Cannot open wave file '%s'\n", in_file_name);
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115 exit(2);
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116 }
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117 if ((x = afGetFrameSize(inhandle, AF_DEFAULT_TRACK, 1)) != 2.0)
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118 {
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119 printf(" Unexpected frame size in wave file '%s'\n", in_file_name);
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120 exit(2);
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121 }
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122 if ((x = afGetRate(inhandle, AF_DEFAULT_TRACK)) != (float) SAMPLE_RATE)
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123 {
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124 printf(" Unexpected sample rate in wave file '%s'\n", in_file_name);
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125 exit(2);
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126 }
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127 if ((x = afGetChannels(inhandle, AF_DEFAULT_TRACK)) != 1.0)
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128 {
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129 printf(" Unexpected number of channels in wave file '%s'\n", in_file_name);
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130 exit(2);
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131 }
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132
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133 if ((filesetup = afNewFileSetup()) == AF_NULL_FILESETUP)
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134 {
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135 fprintf(stderr, " Failed to create file setup\n");
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136 exit(2);
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137 }
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138 afInitSampleFormat(filesetup, AF_DEFAULT_TRACK, AF_SAMPFMT_TWOSCOMP, 16);
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139 afInitRate(filesetup, AF_DEFAULT_TRACK, (float) SAMPLE_RATE);
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140 afInitFileFormat(filesetup, AF_FILE_WAVE);
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141 afInitChannels(filesetup, AF_DEFAULT_TRACK, 1);
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142 if ((outhandle = afOpenFile(OUT_FILE_NAME, "w", filesetup)) == AF_NULL_FILEHANDLE)
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143 {
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144 fprintf(stderr, " Cannot create wave file '%s'\n", OUT_FILE_NAME);
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145 exit(2);
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146 }
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147
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148 if ((ima_enc_state = ima_adpcm_init(NULL, (vbr) ? IMA_ADPCM_VDVI : IMA_ADPCM_DVI4)) == NULL)
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149 {
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150 fprintf(stderr, " Cannot create encoder\n");
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151 exit(2);
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152 }
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153
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154 if ((ima_dec_state = ima_adpcm_init(NULL, (vbr) ? IMA_ADPCM_VDVI : IMA_ADPCM_DVI4)) == NULL)
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155 {
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156 fprintf(stderr, " Cannot create decoder\n");
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157 exit(2);
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158 }
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159
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160 hist_in = 0;
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161 hist_out = 0;
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162 pre_energy = 0.0;
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163 post_energy = 0.0;
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164 diff_energy = 0.0;
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165 while ((frames = afReadFrames(inhandle, AF_DEFAULT_TRACK, pre_amp, 159)))
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166 {
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167 ima_bytes = ima_adpcm_encode(ima_enc_state, ima_data, pre_amp, frames);
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168 dec_frames = ima_adpcm_decode(ima_dec_state, post_amp, ima_data, ima_bytes);
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169 for (i = 0; i < frames; i++)
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170 {
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171 history[hist_in++] = pre_amp[i];
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172 if (hist_in >= HIST_LEN)
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173 hist_in = 0;
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174 pre_energy += (double) pre_amp[i] * (double) pre_amp[i];
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175 }
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176 for (i = 0; i < dec_frames; i++)
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177 {
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178 post_energy += (double) post_amp[i] * (double) post_amp[i];
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179 xx = post_amp[i] - history[hist_out++];
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180 if (hist_out >= HIST_LEN)
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181 hist_out = 0;
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182 diff_energy += (double) xx * (double) xx;
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183 }
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184 outframes = afWriteFrames(outhandle, AF_DEFAULT_TRACK, post_amp, dec_frames);
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185 }
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186 if (afCloseFile(inhandle) != 0)
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187 {
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188 printf(" Cannot close wave file '%s'\n", in_file_name);
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189 exit(2);
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190 }
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191 if (afCloseFile(outhandle) != 0)
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192 {
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193 printf(" Cannot close wave file '%s'\n", OUT_FILE_NAME);
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194 exit(2);
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195 }
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196 afFreeFileSetup(filesetup);
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197 ima_adpcm_release(ima_enc_state);
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198 ima_adpcm_release(ima_dec_state);
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199
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200 printf("Output energy is %f%% of input energy.\n", 100.0*post_energy/pre_energy);
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201 printf("Residual energy is %f%% of the total.\n", 100.0*diff_energy/post_energy);
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202 if (fabs(1.0 - post_energy/pre_energy) > 0.05
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203 ||
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204 fabs(diff_energy/post_energy) > 0.03)
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205 {
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206 printf("Tests failed.\n");
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207 exit(2);
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208 }
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209
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210 printf("Tests passed.\n");
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211 return 0;
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212 }
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213 /*- End of function --------------------------------------------------------*/
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214 /*- End of file ------------------------------------------------------------*/
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