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comparison spandsp-0.0.3/spandsp-0.0.3/tests/time_scale_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 * time_scale_tests.c
5 *
6 * Written by Steve Underwood <steveu@coppice.org>
7 *
8 * Copyright (C) 2004 Steve Underwood
9 *
10 * All rights reserved.
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2, as
14 * published by the Free Software Foundation.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 *
25 * $Id: time_scale_tests.c,v 1.14 2006/11/19 14:07:27 steveu Exp $
26 */
27
28 /*! \page time_scale_tests_page Time scaling tests
29 \section time_scale_tests_page_sec_1 What does it do?
30 These tests run a speech file through the time scaling routines.
31
32 \section time_scale_tests_page_sec_2 How are the tests run?
33 These tests process a speech file called pre_time_scale.wav. This file should contain
34 8000 sample/second 16 bits/sample linear audio. The tests read this file, change the
35 time scale of its contents, and write the resulting audio to post_time_scale.wav.
36 This file also contains 8000 sample/second 16 bits/sample linear audio.
37 */
38
39 #ifdef HAVE_CONFIG_H
40 #include "config.h"
41 #endif
42
43 #include <stdio.h>
44 #include <inttypes.h>
45 #include <stdlib.h>
46 #include <string.h>
47 #if defined(HAVE_TGMATH_H)
48 #include <tgmath.h>
49 #endif
50 #if defined(HAVE_MATH_H)
51 #include <math.h>
52 #endif
53 #include <audiofile.h>
54 #include <tiffio.h>
55
56 #include "spandsp.h"
57
58 #define BLOCK_LEN 160
59
60 #define IN_FILE_NAME "../localtests/short_nb_voice.wav"
61 #define OUT_FILE_NAME "post_time_scaling.wav"
62
63 int main(int argc, char *argv[])
64 {
65 AFfilehandle inhandle;
66 AFfilehandle outhandle;
67 AFfilesetup filesetup;
68 int frames;
69 int new_frames;
70 int out_frames;
71 int count;
72 time_scale_t state;
73 float x;
74 float rate;
75 int16_t in[BLOCK_LEN];
76 int16_t out[5*BLOCK_LEN];
77
78 if ((inhandle = afOpenFile(IN_FILE_NAME, "r", 0)) == AF_NULL_FILEHANDLE)
79 {
80 printf(" Cannot open wave file '%s'\n", IN_FILE_NAME);
81 exit(2);
82 }
83 if ((x = afGetFrameSize(inhandle, AF_DEFAULT_TRACK, 1)) != 2.0)
84 {
85 printf(" Unexpected frame size in wave file '%s'\n", IN_FILE_NAME);
86 exit(2);
87 }
88 if ((x = afGetRate(inhandle, AF_DEFAULT_TRACK)) != (float) SAMPLE_RATE)
89 {
90 printf(" Unexpected sample rate in wave file '%s'\n", IN_FILE_NAME);
91 exit(2);
92 }
93 if ((x = afGetChannels(inhandle, AF_DEFAULT_TRACK)) != 1.0)
94 {
95 printf(" Unexpected number of channels in wave file '%s'\n", IN_FILE_NAME);
96 exit(2);
97 }
98
99 if ((filesetup = afNewFileSetup()) == AF_NULL_FILESETUP)
100 {
101 fprintf(stderr, " Failed to create file setup\n");
102 exit(2);
103 }
104 afInitSampleFormat(filesetup, AF_DEFAULT_TRACK, AF_SAMPFMT_TWOSCOMP, 16);
105 afInitRate(filesetup, AF_DEFAULT_TRACK, (float) SAMPLE_RATE);
106 afInitFileFormat(filesetup, AF_FILE_WAVE);
107 afInitChannels(filesetup, AF_DEFAULT_TRACK, 1);
108 if ((outhandle = afOpenFile(OUT_FILE_NAME, "w", filesetup)) == AF_NULL_FILEHANDLE)
109 {
110 fprintf(stderr, " Cannot create wave file '%s'\n", OUT_FILE_NAME);
111 exit(2);
112 }
113
114 rate = 1.8;
115
116 time_scale_init(&state, rate);
117 count = 0;
118 while ((frames = afReadFrames(inhandle, AF_DEFAULT_TRACK, in, BLOCK_LEN)))
119 {
120 new_frames = time_scale(&state, out, in, frames);
121 out_frames = afWriteFrames(outhandle, AF_DEFAULT_TRACK, out, new_frames);
122 if (out_frames != new_frames)
123 {
124 fprintf(stderr, " Error writing wave file\n");
125 exit(2);
126 }
127 if (++count > 100)
128 {
129 if (rate > 0.5)
130 {
131 rate -= 0.1;
132 if (rate >= 0.99 && rate <= 1.01)
133 rate -= 0.1;
134 printf("Rate is %f\n", rate);
135 time_scale_init(&state, rate);
136 }
137 count = 0;
138 }
139 }
140 if (afCloseFile(inhandle) != 0)
141 {
142 printf(" Cannot close wave file '%s'\n", IN_FILE_NAME);
143 exit(2);
144 }
145 if (afCloseFile(outhandle) != 0)
146 {
147 printf(" Cannot close wave file '%s'\n", OUT_FILE_NAME);
148 exit(2);
149 }
150 afFreeFileSetup(filesetup);
151 return 0;
152 }
153 /*- End of function --------------------------------------------------------*/
154 /*- End of file ------------------------------------------------------------*/

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