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comparison spandsp-0.0.6pre17/tests/oki_adpcm_tests.c @ 4:26cd8f1ef0b1

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import spandsp-0.0.6pre17
author Peter Meerwald <pmeerw@cosy.sbg.ac.at>
date Fri, 25 Jun 2010 15:50:58 +0200
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3:c6c5a16ce2f2 4:26cd8f1ef0b1
1 /*
2 * SpanDSP - a series of DSP components for telephony
3 *
4 * oki_adpcm_tests.c - Test the Oki (Dialogic) ADPCM encode and decode
5 * software at 24kbps and 32kbps.
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: oki_adpcm_tests.c,v 1.37 2009/05/30 15:23:14 steveu Exp $
27 */
28
29 /*! \file */
30
31 /*! \page oki_adpcm_tests_page OKI (Dialogic) ADPCM tests
32 \section oki_adpcm_tests_page_sec_1 What does it do?
33 To perform a general audio quality test, oki_adpcm_tests should be run. The test file
34 ../test-data/local/short_nb_voice.wav will be compressed to the specified bit rate,
35 decompressed, and the resulting audio stored in post_oki_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. Both 32k bps and 24k bps
38 compression may be tested.
39
40 \section oki_adpcm_tests_page_sec_2 How is it used?
41 */
42
43 #if defined(HAVE_CONFIG_H)
44 #include "config.h"
45 #endif
46
47 #include <stdlib.h>
48 #include <stdio.h>
49 #include <fcntl.h>
50 #include <unistd.h>
51 #include <string.h>
52 #include <time.h>
53 #include <sndfile.h>
54
55 //#if defined(WITH_SPANDSP_INTERNALS)
56 #define SPANDSP_EXPOSE_INTERNAL_STRUCTURES
57 //#endif
58
59 #include "spandsp.h"
60 #include "spandsp-sim.h"
61
62 #define IN_FILE_NAME "../test-data/local/short_nb_voice.wav"
63 #define OUT_FILE_NAME "post_oki_adpcm.wav"
64
65 #define HIST_LEN 1000
66
67 int main(int argc, char *argv[])
68 {
69 int i;
70 SNDFILE *inhandle;
71 SNDFILE *outhandle;
72 int frames;
73 int dec_frames;
74 int outframes;
75 int oki_bytes;
76 int bit_rate;
77 double pre_energy;
78 double post_energy;
79 double diff_energy;
80 int16_t pre_amp[HIST_LEN];
81 int16_t post_amp[HIST_LEN];
82 uint8_t oki_data[HIST_LEN];
83 int16_t history[HIST_LEN];
84 int hist_in;
85 int hist_out;
86 oki_adpcm_state_t *oki_enc_state;
87 oki_adpcm_state_t *oki_dec_state;
88 int xx;
89 int total_pre_samples;
90 int total_compressed_bytes;
91 int total_post_samples;
92 const char *in_file_name;
93 int log_encoded_data;
94 int opt;
95
96 bit_rate = 32000;
97 in_file_name = IN_FILE_NAME;
98 log_encoded_data = FALSE;
99 while ((opt = getopt(argc, argv, "2i:l")) != -1)
100 {
101 switch (opt)
102 {
103 case '2':
104 bit_rate = 24000;
105 break;
106 case 'i':
107 in_file_name = optarg;
108 break;
109 case 'l':
110 log_encoded_data = TRUE;
111 break;
112 default:
113 //usage();
114 exit(2);
115 break;
116 }
117 }
118
119 if ((inhandle = sf_open_telephony_read(in_file_name, 1)) == NULL)
120 {
121 fprintf(stderr, " Cannot open audio file '%s'\n", in_file_name);
122 exit(2);
123 }
124 if ((outhandle = sf_open_telephony_write(OUT_FILE_NAME, 1)) == NULL)
125 {
126 fprintf(stderr, " Cannot create audio file '%s'\n", OUT_FILE_NAME);
127 exit(2);
128 }
129
130 if ((oki_enc_state = oki_adpcm_init(NULL, bit_rate)) == NULL)
131 {
132 fprintf(stderr, " Cannot create encoder\n");
133 exit(2);
134 }
135
136 if ((oki_dec_state = oki_adpcm_init(NULL, bit_rate)) == NULL)
137 {
138 fprintf(stderr, " Cannot create decoder\n");
139 exit(2);
140 }
141
142 hist_in = 0;
143 if (bit_rate == 32000)
144 hist_out = 0;
145 else
146 hist_out = HIST_LEN - 27;
147 memset(history, 0, sizeof(history));
148 pre_energy = 0.0;
149 post_energy = 0.0;
150 diff_energy = 0.0;
151 total_pre_samples = 0;
152 total_compressed_bytes = 0;
153 total_post_samples = 0;
154 while ((frames = sf_readf_short(inhandle, pre_amp, 159)))
155 {
156 total_pre_samples += frames;
157 oki_bytes = oki_adpcm_encode(oki_enc_state, oki_data, pre_amp, frames);
158 if (log_encoded_data)
159 write(1, oki_data, oki_bytes);
160 total_compressed_bytes += oki_bytes;
161 dec_frames = oki_adpcm_decode(oki_dec_state, post_amp, oki_data, oki_bytes);
162 total_post_samples += dec_frames;
163 for (i = 0; i < frames; i++)
164 {
165 history[hist_in++] = pre_amp[i];
166 if (hist_in >= HIST_LEN)
167 hist_in = 0;
168 pre_energy += (double) pre_amp[i] * (double) pre_amp[i];
169 }
170 for (i = 0; i < dec_frames; i++)
171 {
172 post_energy += (double) post_amp[i] * (double) post_amp[i];
173 xx = post_amp[i] - history[hist_out++];
174 if (hist_out >= HIST_LEN)
175 hist_out = 0;
176 diff_energy += (double) xx * (double) xx;
177 //post_amp[i] = xx;
178 }
179 outframes = sf_writef_short(outhandle, post_amp, dec_frames);
180 }
181 if (sf_close(inhandle) != 0)
182 {
183 fprintf(stderr, " Cannot close audio file '%s'\n", in_file_name);
184 exit(2);
185 }
186 if (sf_close(outhandle) != 0)
187 {
188 fprintf(stderr, " Cannot close audio file '%s'\n", OUT_FILE_NAME);
189 exit(2);
190 }
191 oki_adpcm_release(oki_enc_state);
192 oki_adpcm_release(oki_dec_state);
193
194 printf("Pre samples: %d\n", total_pre_samples);
195 printf("Compressed bytes: %d\n", total_compressed_bytes);
196 printf("Post samples: %d\n", total_post_samples);
197
198 printf("Output energy is %f%% of input energy.\n", 100.0*post_energy/pre_energy);
199 printf("Residual energy is %f%% of the total.\n", 100.0*diff_energy/post_energy);
200 if (bit_rate == 32000)
201 {
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 else
211 {
212 if (fabs(1.0 - post_energy/pre_energy) > 0.20
213 ||
214 fabs(diff_energy/post_energy) > 0.10)
215 {
216 printf("Tests failed.\n");
217 exit(2);
218 }
219 }
220
221 printf("Tests passed.\n");
222 return 0;
223 }
224 /*- End of function --------------------------------------------------------*/
225 /*- End of file ------------------------------------------------------------*/

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