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comparison spandsp-0.0.3/spandsp-0.0.3/tests/oki_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 * 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 1.23 2006/11/19 14:07:27 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 ../localtests/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 #ifdef HAVE_CONFIG_H
44 #include "config.h"
45 #endif
46
47 #include <stdlib.h>
48 #include <inttypes.h>
49 #include <string.h>
50 #if defined(HAVE_TGMATH_H)
51 #include <tgmath.h>
52 #endif
53 #if defined(HAVE_MATH_H)
54 #include <math.h>
55 #endif
56 #include <stdio.h>
57 #include <time.h>
58 #include <fcntl.h>
59 #include <audiofile.h>
60 #include <tiffio.h>
61
62 #include "spandsp.h"
63
64 #define IN_FILE_NAME "../localtests/short_nb_voice.wav"
65 #define OUT_FILE_NAME "post_oki_adpcm.wav"
66
67 #define HIST_LEN 1000
68
69 int main(int argc, char *argv[])
70 {
71 int i;
72 AFfilehandle inhandle;
73 AFfilehandle outhandle;
74 AFfilesetup filesetup;
75 int frames;
76 int dec_frames;
77 int outframes;
78 int oki_bytes;
79 int bit_rate;
80 float x;
81 double pre_energy;
82 double post_energy;
83 double diff_energy;
84 int16_t pre_amp[HIST_LEN];
85 int16_t post_amp[HIST_LEN];
86 uint8_t oki_data[HIST_LEN];
87 int16_t history[HIST_LEN];
88 int hist_in;
89 int hist_out;
90 oki_adpcm_state_t *oki_enc_state;
91 oki_adpcm_state_t *oki_dec_state;
92 int xx;
93 int total_pre_samples;
94 int total_compressed_bytes;
95 int total_post_samples;
96 const char *in_file_name;
97
98 bit_rate = 32000;
99 in_file_name = IN_FILE_NAME;
100 for (i = 1; i < argc; i++)
101 {
102 if (strcmp(argv[i], "-2") == 0)
103 {
104 bit_rate = 24000;
105 continue;
106 }
107 if (strcmp(argv[i], "-i") == 0)
108 {
109 in_file_name = argv[++i];
110 continue;
111 }
112 fprintf(stderr, "Unknown parameter %s specified.\n", argv[i]);
113 exit(2);
114 }
115
116 if ((inhandle = afOpenFile(in_file_name, "r", 0)) == AF_NULL_FILEHANDLE)
117 {
118 printf(" Cannot open wave file '%s'\n", in_file_name);
119 exit(2);
120 }
121 if ((x = afGetFrameSize(inhandle, AF_DEFAULT_TRACK, 1)) != 2.0)
122 {
123 printf(" Unexpected frame size in wave file '%s'\n", in_file_name);
124 exit(2);
125 }
126 if ((x = afGetRate(inhandle, AF_DEFAULT_TRACK)) != (float) SAMPLE_RATE)
127 {
128 printf(" Unexpected sample rate in wave file '%s'\n", in_file_name);
129 exit(2);
130 }
131 if ((x = afGetChannels(inhandle, AF_DEFAULT_TRACK)) != 1.0)
132 {
133 printf(" Unexpected number of channels in wave file '%s'\n", in_file_name);
134 exit(2);
135 }
136 if ((filesetup = afNewFileSetup()) == AF_NULL_FILESETUP)
137 {
138 fprintf(stderr, " Failed to create file setup\n");
139 exit(2);
140 }
141 afInitSampleFormat(filesetup, AF_DEFAULT_TRACK, AF_SAMPFMT_TWOSCOMP, 16);
142 afInitRate(filesetup, AF_DEFAULT_TRACK, (float) SAMPLE_RATE);
143 afInitFileFormat(filesetup, AF_FILE_WAVE);
144 afInitChannels(filesetup, AF_DEFAULT_TRACK, 1);
145
146 outhandle = afOpenFile(OUT_FILE_NAME, "w", filesetup);
147 if (outhandle == AF_NULL_FILEHANDLE)
148 {
149 fprintf(stderr, " Cannot create wave file '%s'\n", OUT_FILE_NAME);
150 exit(2);
151 }
152
153 if ((oki_enc_state = oki_adpcm_init(NULL, bit_rate)) == NULL)
154 {
155 fprintf(stderr, " Cannot create encoder\n");
156 exit(2);
157 }
158
159 if ((oki_dec_state = oki_adpcm_init(NULL, bit_rate)) == NULL)
160 {
161 fprintf(stderr, " Cannot create decoder\n");
162 exit(2);
163 }
164
165 hist_in = 0;
166 if (bit_rate == 32000)
167 hist_out = 0;
168 else
169 hist_out = HIST_LEN - 27;
170 memset(history, 0, sizeof(history));
171 pre_energy = 0.0;
172 post_energy = 0.0;
173 diff_energy = 0.0;
174 total_pre_samples = 0;
175 total_compressed_bytes = 0;
176 total_post_samples = 0;
177 while ((frames = afReadFrames(inhandle, AF_DEFAULT_TRACK, pre_amp, 159)))
178 {
179 total_pre_samples +=frames;
180 oki_bytes = oki_adpcm_encode(oki_enc_state, oki_data, pre_amp, frames);
181 total_compressed_bytes += oki_bytes;
182 dec_frames = oki_adpcm_decode(oki_dec_state, post_amp, oki_data, oki_bytes);
183 total_post_samples += dec_frames;
184 for (i = 0; i < frames; i++)
185 {
186 history[hist_in++] = pre_amp[i];
187 if (hist_in >= HIST_LEN)
188 hist_in = 0;
189 pre_energy += (double) pre_amp[i] * (double) pre_amp[i];
190 }
191 for (i = 0; i < dec_frames; i++)
192 {
193 post_energy += (double) post_amp[i] * (double) post_amp[i];
194 xx = post_amp[i] - history[hist_out++];
195 if (hist_out >= HIST_LEN)
196 hist_out = 0;
197 diff_energy += (double) xx * (double) xx;
198 //post_amp[i] = xx;
199 }
200 outframes = afWriteFrames(outhandle, AF_DEFAULT_TRACK, post_amp, dec_frames);
201 }
202 if (afCloseFile(inhandle) != 0)
203 {
204 printf(" Cannot close wave file '%s'\n", in_file_name);
205 exit(2);
206 }
207 if (afCloseFile(outhandle) != 0)
208 {
209 printf(" Cannot close wave file '%s'\n", OUT_FILE_NAME);
210 exit(2);
211 }
212 afFreeFileSetup(filesetup);
213 oki_adpcm_release(oki_enc_state);
214 oki_adpcm_release(oki_dec_state);
215
216 printf("Pre samples: %d\n", total_pre_samples);
217 printf("Compressed bytes: %d\n", total_compressed_bytes);
218 printf("Post samples: %d\n", total_post_samples);
219
220 printf("Output energy is %f%% of input energy.\n", 100.0*post_energy/pre_energy);
221 printf("Residual energy is %f%% of the total.\n", 100.0*diff_energy/post_energy);
222 if (bit_rate == 32000)
223 {
224 if (fabs(1.0 - post_energy/pre_energy) > 0.05
225 ||
226 fabs(diff_energy/post_energy) > 0.03)
227 {
228 printf("Tests failed.\n");
229 exit(2);
230 }
231 }
232 else
233 {
234 if (fabs(1.0 - post_energy/pre_energy) > 0.20
235 ||
236 fabs(diff_energy/post_energy) > 0.10)
237 {
238 printf("Tests failed.\n");
239 exit(2);
240 }
241 }
242
243 printf("Tests passed.\n");
244 return 0;
245 }
246 /*- End of function --------------------------------------------------------*/
247 /*- End of file ------------------------------------------------------------*/

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