Mercurial > hg > audiostuff
comparison spandsp-0.0.6pre17/tests/oki_adpcm_tests.c @ 4:26cd8f1ef0b1
import spandsp-0.0.6pre17
author | Peter Meerwald <pmeerw@cosy.sbg.ac.at> |
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date | Fri, 25 Jun 2010 15:50:58 +0200 |
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3:c6c5a16ce2f2 | 4:26cd8f1ef0b1 |
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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 ------------------------------------------------------------*/ |