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comparison spandsp-0.0.3/spandsp-0.0.3/tests/ima_adpcm_tests.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 * ima_adpcm_tests.c - Test the IMA/DVI/Intel ADPCM encode and decode
5 * software.
6 *
7 * Written by Steve Underwood <steveu@coppice.org>
8 *
9 * Copyright (C) 2004 Steve Underwood
10 *
11 * All rights reserved.
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License version 2, as
15 * published by the Free Software Foundation.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 *
26 * $Id: ima_adpcm_tests.c,v 1.22 2006/11/19 14:07:27 steveu Exp $
27 */
28
29 /*! \file */
30
31 /*! \page ima_adpcm_tests_page IMA ADPCM tests
32 \section ima_adpcm_tests_page_sec_1 What does it do?
33 To perform a general audio quality test, ima_adpcm_tests should be run. The test file
34 ../localtests/short_nb_voice.wav will be compressed to the specified bit rate,
35 decompressed, and the resulting audio stored in post_ima_adpcm.wav. A simple SNR test
36 is automatically performed. Listening tests may be used for a more detailed evaluation
37 of the degradation in quality caused by the compression.
38
39 \section ima_adpcm_tests_page_sec_2 How is it used?
40 */
41
42 #ifdef HAVE_CONFIG_H
43 #include "config.h"
44 #endif
45
46 #include <stdlib.h>
47 #include <inttypes.h>
48 #include <string.h>
49 #if defined(HAVE_TGMATH_H)
50 #include <tgmath.h>
51 #endif
52 #if defined(HAVE_MATH_H)
53 #include <math.h>
54 #endif
55 #include <stdio.h>
56 #include <time.h>
57 #include <fcntl.h>
58 #include <audiofile.h>
59 #include <tiffio.h>
60
61 #include "spandsp.h"
62
63 #define IN_FILE_NAME "../localtests/short_nb_voice.wav"
64 #define OUT_FILE_NAME "post_ima_adpcm.wav"
65
66 #define HIST_LEN 1000
67
68 int main(int argc, char *argv[])
69 {
70 int i;
71 AFfilehandle inhandle;
72 AFfilehandle outhandle;
73 AFfilesetup filesetup;
74 int frames;
75 int dec_frames;
76 int outframes;
77 int ima_bytes;
78 float x;
79 double pre_energy;
80 double post_energy;
81 double diff_energy;
82 int16_t pre_amp[HIST_LEN];
83 int16_t post_amp[HIST_LEN];
84 uint8_t ima_data[HIST_LEN];
85 int16_t history[HIST_LEN];
86 int hist_in;
87 int hist_out;
88 ima_adpcm_state_t *ima_enc_state;
89 ima_adpcm_state_t *ima_dec_state;
90 int xx;
91 int vbr;
92 const char *in_file_name;
93
94 vbr = FALSE;
95 in_file_name = IN_FILE_NAME;
96 for (i = 1; i < argc; i++)
97 {
98 if (strcmp(argv[i], "-v") == 0)
99 {
100 vbr = TRUE;
101 continue;
102 }
103 if (strcmp(argv[i], "-i") == 0)
104 {
105 in_file_name = argv[++i];
106 continue;
107 }
108 fprintf(stderr, "Unknown parameter %s specified.\n", argv[i]);
109 exit(2);
110 }
111
112 if ((inhandle = afOpenFile(in_file_name, "r", 0)) == AF_NULL_FILEHANDLE)
113 {
114 printf(" Cannot open wave file '%s'\n", in_file_name);
115 exit(2);
116 }
117 if ((x = afGetFrameSize(inhandle, AF_DEFAULT_TRACK, 1)) != 2.0)
118 {
119 printf(" Unexpected frame size in wave file '%s'\n", in_file_name);
120 exit(2);
121 }
122 if ((x = afGetRate(inhandle, AF_DEFAULT_TRACK)) != (float) SAMPLE_RATE)
123 {
124 printf(" Unexpected sample rate in wave file '%s'\n", in_file_name);
125 exit(2);
126 }
127 if ((x = afGetChannels(inhandle, AF_DEFAULT_TRACK)) != 1.0)
128 {
129 printf(" Unexpected number of channels in wave file '%s'\n", in_file_name);
130 exit(2);
131 }
132
133 if ((filesetup = afNewFileSetup()) == AF_NULL_FILESETUP)
134 {
135 fprintf(stderr, " Failed to create file setup\n");
136 exit(2);
137 }
138 afInitSampleFormat(filesetup, AF_DEFAULT_TRACK, AF_SAMPFMT_TWOSCOMP, 16);
139 afInitRate(filesetup, AF_DEFAULT_TRACK, (float) SAMPLE_RATE);
140 afInitFileFormat(filesetup, AF_FILE_WAVE);
141 afInitChannels(filesetup, AF_DEFAULT_TRACK, 1);
142 if ((outhandle = afOpenFile(OUT_FILE_NAME, "w", filesetup)) == AF_NULL_FILEHANDLE)
143 {
144 fprintf(stderr, " Cannot create wave file '%s'\n", OUT_FILE_NAME);
145 exit(2);
146 }
147
148 if ((ima_enc_state = ima_adpcm_init(NULL, (vbr) ? IMA_ADPCM_VDVI : IMA_ADPCM_DVI4)) == NULL)
149 {
150 fprintf(stderr, " Cannot create encoder\n");
151 exit(2);
152 }
153
154 if ((ima_dec_state = ima_adpcm_init(NULL, (vbr) ? IMA_ADPCM_VDVI : IMA_ADPCM_DVI4)) == NULL)
155 {
156 fprintf(stderr, " Cannot create decoder\n");
157 exit(2);
158 }
159
160 hist_in = 0;
161 hist_out = 0;
162 pre_energy = 0.0;
163 post_energy = 0.0;
164 diff_energy = 0.0;
165 while ((frames = afReadFrames(inhandle, AF_DEFAULT_TRACK, pre_amp, 159)))
166 {
167 ima_bytes = ima_adpcm_encode(ima_enc_state, ima_data, pre_amp, frames);
168 dec_frames = ima_adpcm_decode(ima_dec_state, post_amp, ima_data, ima_bytes);
169 for (i = 0; i < frames; i++)
170 {
171 history[hist_in++] = pre_amp[i];
172 if (hist_in >= HIST_LEN)
173 hist_in = 0;
174 pre_energy += (double) pre_amp[i] * (double) pre_amp[i];
175 }
176 for (i = 0; i < dec_frames; i++)
177 {
178 post_energy += (double) post_amp[i] * (double) post_amp[i];
179 xx = post_amp[i] - history[hist_out++];
180 if (hist_out >= HIST_LEN)
181 hist_out = 0;
182 diff_energy += (double) xx * (double) xx;
183 }
184 outframes = afWriteFrames(outhandle, AF_DEFAULT_TRACK, post_amp, dec_frames);
185 }
186 if (afCloseFile(inhandle) != 0)
187 {
188 printf(" Cannot close wave file '%s'\n", in_file_name);
189 exit(2);
190 }
191 if (afCloseFile(outhandle) != 0)
192 {
193 printf(" Cannot close wave file '%s'\n", OUT_FILE_NAME);
194 exit(2);
195 }
196 afFreeFileSetup(filesetup);
197 ima_adpcm_release(ima_enc_state);
198 ima_adpcm_release(ima_dec_state);
199
200 printf("Output energy is %f%% of input energy.\n", 100.0*post_energy/pre_energy);
201 printf("Residual energy is %f%% of the total.\n", 100.0*diff_energy/post_energy);
202 if (fabs(1.0 - post_energy/pre_energy) > 0.05
203 ||
204 fabs(diff_energy/post_energy) > 0.03)
205 {
206 printf("Tests failed.\n");
207 exit(2);
208 }
209
210 printf("Tests passed.\n");
211 return 0;
212 }
213 /*- End of function --------------------------------------------------------*/
214 /*- End of file ------------------------------------------------------------*/

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