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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 * test_utils.c - Utility routines for module tests.
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5 *
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6 * Written by Steve Underwood <steveu@coppice.org>
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7 *
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8 * Copyright (C) 2006 Steve Underwood
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9 *
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10 * All rights reserved.
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11 *
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12 * This program is free software; you can redistribute it and/or modify
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13 * it under the terms of the GNU General Public License version 2, as
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14 * published by the Free Software Foundation.
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15 *
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16 * This program is distributed in the hope that it will be useful,
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17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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19 * GNU General Public License for more details.
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20 *
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21 * You should have received a copy of the GNU General Public License
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22 * along with this program; if not, write to the Free Software
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23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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24 *
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25 * $Id: test_utils.c,v 1.7 2006/11/19 14:07:27 steveu Exp $
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26 */
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27
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28 /*! \file */
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29
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30 #ifdef HAVE_CONFIG_H
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31 #include "config.h"
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32 #endif
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33
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34 #include <stdlib.h>
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35 #include <inttypes.h>
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36 #include <string.h>
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37 #include <stdio.h>
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38 #if defined(HAVE_TGMATH_H)
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39 #include <tgmath.h>
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40 #endif
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41 #if defined(HAVE_MATH_H)
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42 #include <math.h>
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43 #endif
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44 #include <time.h>
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45 #include <fcntl.h>
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46 #include <audiofile.h>
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47 #include <tiffio.h>
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48
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49 #include "spandsp.h"
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50 #include "test_utils.h"
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51
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52 struct codec_munge_state_s
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53 {
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54 int munging_codec;
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55 g726_state_t g726_enc_state;
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56 g726_state_t g726_dec_state;
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57 };
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58
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59 codec_munge_state_t *codec_munge_init(int codec)
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60 {
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61 codec_munge_state_t *s;
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62
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63 if ((s = (codec_munge_state_t *) malloc(sizeof(*s))))
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64 {
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65 switch (codec)
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66 {
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67 case MUNGE_CODEC_G726_40K:
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68 g726_init(&s->g726_enc_state, 40000, G726_ENCODING_LINEAR, G726_PACKING_NONE);
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69 g726_init(&s->g726_dec_state, 40000, G726_ENCODING_LINEAR, G726_PACKING_NONE);
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70 s->munging_codec = MUNGE_CODEC_G726_32K;
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71 break;
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72 case MUNGE_CODEC_G726_32K:
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73 g726_init(&s->g726_enc_state, 32000, G726_ENCODING_LINEAR, G726_PACKING_NONE);
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74 g726_init(&s->g726_dec_state, 32000, G726_ENCODING_LINEAR, G726_PACKING_NONE);
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75 s->munging_codec = MUNGE_CODEC_G726_32K;
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76 break;
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77 case MUNGE_CODEC_G726_24K:
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78 g726_init(&s->g726_enc_state, 24000, G726_ENCODING_LINEAR, G726_PACKING_NONE);
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79 g726_init(&s->g726_dec_state, 24000, G726_ENCODING_LINEAR, G726_PACKING_NONE);
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80 s->munging_codec = MUNGE_CODEC_G726_32K;
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81 break;
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82 case MUNGE_CODEC_G726_16K:
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83 g726_init(&s->g726_enc_state, 16000, G726_ENCODING_LINEAR, G726_PACKING_NONE);
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84 g726_init(&s->g726_dec_state, 16000, G726_ENCODING_LINEAR, G726_PACKING_NONE);
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85 s->munging_codec = MUNGE_CODEC_G726_32K;
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86 break;
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87 default:
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88 s->munging_codec = codec;
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89 break;
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90 }
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91 }
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92 return s;
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93 }
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94 /*- End of function --------------------------------------------------------*/
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95
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96 void codec_munge(codec_munge_state_t *s, int16_t amp[], int len)
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97 {
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98 uint8_t law;
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99 uint8_t adpcmdata[160];
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100 int i;
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101 int adpcm;
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102 int x;
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103
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104 switch (s->munging_codec)
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105 {
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106 case MUNGE_CODEC_NONE:
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107 /* Do nothing */
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108 break;
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109 case MUNGE_CODEC_ALAW:
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110 for (i = 0; i < len; i++)
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111 {
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112 law = linear_to_alaw(amp[i]);
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113 amp[i] = alaw_to_linear(law);
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114 }
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115 break;
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116 case MUNGE_CODEC_ULAW:
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117 for (i = 0; i < len; i++)
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118 {
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119 law = linear_to_ulaw(amp[i]);
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120 amp[i] = ulaw_to_linear(law);
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121 }
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122 break;
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123 case MUNGE_CODEC_G726_32K:
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124 /* This could actually be any of the G.726 rates */
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125 for (i = 0; i < len; i += x)
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126 {
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127 x = (len - i >= 160) ? 160 : (len - i);
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128 adpcm = g726_encode(&s->g726_enc_state, adpcmdata, amp + i, x);
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129 g726_decode(&s->g726_dec_state, amp + i, adpcmdata, adpcm);
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130 }
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131 break;
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132 }
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133 }
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134 /*- End of function --------------------------------------------------------*/
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135 /*- End of file ------------------------------------------------------------*/
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