Mercurial > hg > audiostuff
comparison spandsp-0.0.6pre17/tests/ima_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 * 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 1.36 2009/05/30 15:23:14 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 ../test-data/local/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 #if defined(HAVE_CONFIG_H) | |
43 #include "config.h" | |
44 #endif | |
45 | |
46 #include <stdlib.h> | |
47 #include <stdio.h> | |
48 #include <fcntl.h> | |
49 #include <unistd.h> | |
50 #include <string.h> | |
51 #include <time.h> | |
52 #include <sndfile.h> | |
53 | |
54 //#if defined(WITH_SPANDSP_INTERNALS) | |
55 #define SPANDSP_EXPOSE_INTERNAL_STRUCTURES | |
56 //#endif | |
57 | |
58 #include "spandsp.h" | |
59 #include "spandsp-sim.h" | |
60 | |
61 #define IN_FILE_NAME "../test-data/local/short_nb_voice.wav" | |
62 #define OUT_FILE_NAME "post_ima_adpcm.wav" | |
63 | |
64 #define HIST_LEN 2000 | |
65 | |
66 int main(int argc, char *argv[]) | |
67 { | |
68 int i; | |
69 SNDFILE *inhandle; | |
70 SNDFILE *outhandle; | |
71 int frames; | |
72 int dec_frames; | |
73 int outframes; | |
74 int ima_bytes; | |
75 double pre_energy; | |
76 double post_energy; | |
77 double diff_energy; | |
78 int16_t pre_amp[HIST_LEN]; | |
79 int16_t post_amp[HIST_LEN]; | |
80 uint8_t ima_data[HIST_LEN]; | |
81 int16_t history[HIST_LEN]; | |
82 int hist_in; | |
83 int hist_out; | |
84 ima_adpcm_state_t *ima_enc_state; | |
85 ima_adpcm_state_t *ima_dec_state; | |
86 int xx; | |
87 int total_pre_samples; | |
88 int total_compressed_bytes; | |
89 int total_post_samples; | |
90 const char *in_file_name; | |
91 int variant; | |
92 int chunk_size; | |
93 int enc_chunk_size; | |
94 int log_encoded_data; | |
95 int opt; | |
96 | |
97 variant = IMA_ADPCM_DVI4; | |
98 in_file_name = IN_FILE_NAME; | |
99 chunk_size = 160; | |
100 enc_chunk_size = 0; | |
101 log_encoded_data = FALSE; | |
102 while ((opt = getopt(argc, argv, "ac:i:lv")) != -1) | |
103 { | |
104 switch (opt) | |
105 { | |
106 case 'a': | |
107 variant = IMA_ADPCM_IMA4; | |
108 chunk_size = 505; | |
109 break; | |
110 case 'c': | |
111 enc_chunk_size = atoi(optarg); | |
112 break; | |
113 case 'i': | |
114 in_file_name = optarg; | |
115 break; | |
116 case 'l': | |
117 log_encoded_data = TRUE; | |
118 break; | |
119 case 'v': | |
120 variant = IMA_ADPCM_VDVI; | |
121 break; | |
122 default: | |
123 //usage(); | |
124 exit(2); | |
125 break; | |
126 } | |
127 } | |
128 | |
129 if ((inhandle = sf_open_telephony_read(in_file_name, 1)) == NULL) | |
130 { | |
131 fprintf(stderr, " Cannot open audio file '%s'\n", in_file_name); | |
132 exit(2); | |
133 } | |
134 | |
135 if ((outhandle = sf_open_telephony_write(OUT_FILE_NAME, 1)) == NULL) | |
136 { | |
137 fprintf(stderr, " Cannot create audio file '%s'\n", OUT_FILE_NAME); | |
138 exit(2); | |
139 } | |
140 | |
141 if ((ima_enc_state = ima_adpcm_init(NULL, variant, enc_chunk_size)) == NULL) | |
142 { | |
143 fprintf(stderr, " Cannot create encoder\n"); | |
144 exit(2); | |
145 } | |
146 | |
147 if ((ima_dec_state = ima_adpcm_init(NULL, variant, enc_chunk_size)) == NULL) | |
148 { | |
149 fprintf(stderr, " Cannot create decoder\n"); | |
150 exit(2); | |
151 } | |
152 | |
153 hist_in = 0; | |
154 hist_out = 0; | |
155 pre_energy = 0.0; | |
156 post_energy = 0.0; | |
157 diff_energy = 0.0; | |
158 total_pre_samples = 0; | |
159 total_compressed_bytes = 0; | |
160 total_post_samples = 0; | |
161 while ((frames = sf_readf_short(inhandle, pre_amp, chunk_size))) | |
162 { | |
163 total_pre_samples += frames; | |
164 ima_bytes = ima_adpcm_encode(ima_enc_state, ima_data, pre_amp, frames); | |
165 if (log_encoded_data) | |
166 write(1, ima_data, ima_bytes); | |
167 total_compressed_bytes += ima_bytes; | |
168 dec_frames = ima_adpcm_decode(ima_dec_state, post_amp, ima_data, ima_bytes); | |
169 total_post_samples += dec_frames; | |
170 for (i = 0; i < frames; i++) | |
171 { | |
172 history[hist_in++] = pre_amp[i]; | |
173 if (hist_in >= HIST_LEN) | |
174 hist_in = 0; | |
175 pre_energy += (double) pre_amp[i] * (double) pre_amp[i]; | |
176 } | |
177 for (i = 0; i < dec_frames; i++) | |
178 { | |
179 post_energy += (double) post_amp[i] * (double) post_amp[i]; | |
180 xx = post_amp[i] - history[hist_out++]; | |
181 if (hist_out >= HIST_LEN) | |
182 hist_out = 0; | |
183 diff_energy += (double) xx * (double) xx; | |
184 } | |
185 outframes = sf_writef_short(outhandle, post_amp, dec_frames); | |
186 } | |
187 if (sf_close(inhandle) != 0) | |
188 { | |
189 fprintf(stderr, " Cannot close audio file '%s'\n", in_file_name); | |
190 exit(2); | |
191 } | |
192 if (sf_close(outhandle) != 0) | |
193 { | |
194 fprintf(stderr, " Cannot close audio file '%s'\n", OUT_FILE_NAME); | |
195 exit(2); | |
196 } | |
197 ima_adpcm_release(ima_enc_state); | |
198 ima_adpcm_release(ima_dec_state); | |
199 | |
200 printf("Pre samples: %d\n", total_pre_samples); | |
201 printf("Compressed bytes: %d\n", total_compressed_bytes); | |
202 printf("Post samples: %d\n", total_post_samples); | |
203 | |
204 printf("Output energy is %f%% of input energy.\n", 100.0*post_energy/pre_energy); | |
205 printf("Residual energy is %f%% of the total.\n", 100.0*diff_energy/post_energy); | |
206 if (fabs(1.0 - post_energy/pre_energy) > 0.05 | |
207 || | |
208 fabs(diff_energy/post_energy) > 0.03) | |
209 { | |
210 printf("Tests failed.\n"); | |
211 exit(2); | |
212 } | |
213 | |
214 printf("Tests passed.\n"); | |
215 return 0; | |
216 } | |
217 /*- End of function --------------------------------------------------------*/ | |
218 /*- End of file ------------------------------------------------------------*/ |