|
5
|
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 ------------------------------------------------------------*/
|
