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comparison spandsp-0.0.3/spandsp-0.0.3/tests/test_utils.c @ 5:f762bf195c4b

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import spandsp-0.0.3
author Peter Meerwald <pmeerw@cosy.sbg.ac.at>
date Fri, 25 Jun 2010 16:00:21 +0200
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4:26cd8f1ef0b1 5:f762bf195c4b
1 /*
2 * SpanDSP - a series of DSP components for telephony
3 *
4 * test_utils.c - Utility routines for module tests.
5 *
6 * Written by Steve Underwood <steveu@coppice.org>
7 *
8 * Copyright (C) 2006 Steve Underwood
9 *
10 * All rights reserved.
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2, as
14 * published by the Free Software Foundation.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 *
25 * $Id: test_utils.c,v 1.7 2006/11/19 14:07:27 steveu Exp $
26 */
27
28 /*! \file */
29
30 #ifdef HAVE_CONFIG_H
31 #include "config.h"
32 #endif
33
34 #include <stdlib.h>
35 #include <inttypes.h>
36 #include <string.h>
37 #include <stdio.h>
38 #if defined(HAVE_TGMATH_H)
39 #include <tgmath.h>
40 #endif
41 #if defined(HAVE_MATH_H)
42 #include <math.h>
43 #endif
44 #include <time.h>
45 #include <fcntl.h>
46 #include <audiofile.h>
47 #include <tiffio.h>
48
49 #include "spandsp.h"
50 #include "test_utils.h"
51
52 struct codec_munge_state_s
53 {
54 int munging_codec;
55 g726_state_t g726_enc_state;
56 g726_state_t g726_dec_state;
57 };
58
59 codec_munge_state_t *codec_munge_init(int codec)
60 {
61 codec_munge_state_t *s;
62
63 if ((s = (codec_munge_state_t *) malloc(sizeof(*s))))
64 {
65 switch (codec)
66 {
67 case MUNGE_CODEC_G726_40K:
68 g726_init(&s->g726_enc_state, 40000, G726_ENCODING_LINEAR, G726_PACKING_NONE);
69 g726_init(&s->g726_dec_state, 40000, G726_ENCODING_LINEAR, G726_PACKING_NONE);
70 s->munging_codec = MUNGE_CODEC_G726_32K;
71 break;
72 case MUNGE_CODEC_G726_32K:
73 g726_init(&s->g726_enc_state, 32000, G726_ENCODING_LINEAR, G726_PACKING_NONE);
74 g726_init(&s->g726_dec_state, 32000, G726_ENCODING_LINEAR, G726_PACKING_NONE);
75 s->munging_codec = MUNGE_CODEC_G726_32K;
76 break;
77 case MUNGE_CODEC_G726_24K:
78 g726_init(&s->g726_enc_state, 24000, G726_ENCODING_LINEAR, G726_PACKING_NONE);
79 g726_init(&s->g726_dec_state, 24000, G726_ENCODING_LINEAR, G726_PACKING_NONE);
80 s->munging_codec = MUNGE_CODEC_G726_32K;
81 break;
82 case MUNGE_CODEC_G726_16K:
83 g726_init(&s->g726_enc_state, 16000, G726_ENCODING_LINEAR, G726_PACKING_NONE);
84 g726_init(&s->g726_dec_state, 16000, G726_ENCODING_LINEAR, G726_PACKING_NONE);
85 s->munging_codec = MUNGE_CODEC_G726_32K;
86 break;
87 default:
88 s->munging_codec = codec;
89 break;
90 }
91 }
92 return s;
93 }
94 /*- End of function --------------------------------------------------------*/
95
96 void codec_munge(codec_munge_state_t *s, int16_t amp[], int len)
97 {
98 uint8_t law;
99 uint8_t adpcmdata[160];
100 int i;
101 int adpcm;
102 int x;
103
104 switch (s->munging_codec)
105 {
106 case MUNGE_CODEC_NONE:
107 /* Do nothing */
108 break;
109 case MUNGE_CODEC_ALAW:
110 for (i = 0; i < len; i++)
111 {
112 law = linear_to_alaw(amp[i]);
113 amp[i] = alaw_to_linear(law);
114 }
115 break;
116 case MUNGE_CODEC_ULAW:
117 for (i = 0; i < len; i++)
118 {
119 law = linear_to_ulaw(amp[i]);
120 amp[i] = ulaw_to_linear(law);
121 }
122 break;
123 case MUNGE_CODEC_G726_32K:
124 /* This could actually be any of the G.726 rates */
125 for (i = 0; i < len; i += x)
126 {
127 x = (len - i >= 160) ? 160 : (len - i);
128 adpcm = g726_encode(&s->g726_enc_state, adpcmdata, amp + i, x);
129 g726_decode(&s->g726_dec_state, amp + i, adpcmdata, adpcm);
130 }
131 break;
132 }
133 }
134 /*- End of function --------------------------------------------------------*/
135 /*- End of file ------------------------------------------------------------*/

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