1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
|
/*
* FILE: resample.c
* Sampling-rate-conversion main program (command line usage)
*/
static char resampleVersion[]
= "\n\tresample version 1.9 (Feb. 1, 2006 - jos@ccrma.stanford.edu)\n\n\
Copyright 1982-2006 by Julius Smith.\n\
This is free software. See the Lesser GNU Public License (LGPL) for copying conditions.\n\
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A\n\
PARTICULAR PURPOSE.\n\n\
";
#define USAGE "\
\n\
USAGE: One of the following:\n\
\n\
resample -to srate [-noFilterInterp] [-linearSignalInterp] [-f filterFile] [-terse] inputSoundFile outputSoundFile\n\
resample -by factor [options as above] inputSoundFile outputSoundFile\n\
resample -version\n\
\n\
Options can be abbreviated.\n\n\
Report bugs to <bug-resample@w3k.org>.\n\n\
"
#include "filterkit.h"
#include "resample.h"
#include "sndlibextra.h"
#include <stdio.h>
#include <math.h>
#include <string.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <errno.h>
static int trace = 1; /* controls verbosity of output */
static char comment[256] = "";
static void fail(char *s)
{
fprintf(stderr,"\n*** resample: %s \n",s); /* Display error message */
fprintf(stderr,USAGE);
exit(1); /* Exit, indicating error */
}
static void fails(char *s, char *s2)
{
printf("resample: "); /* Display error message */
printf(s,s2);
printf("\n\n");
exit(1); /* Exit, indicating error */
}
int main(int argc, char *argv[])
{
double factor = -2.0; /* factor = Sndout/Sndin */
double newsrate=0;
BOOL interpFilt = TRUE; /* TRUE means interpolate filter coeffs */
BOOL largeFilter = FALSE; /* TRUE means use 65-tap FIR filter */
BOOL linearInterp = FALSE; /* TRUE => no filter, linearly interpolate */
BOOL knowFactor = FALSE; /* Used to detect insufficient command-line spec */
int inCount, outCount, outCountReal;
int infd, outfd, insrate, nChans, result;
int inType, inFormat;
int outType, outFormat;
struct stat statbuf;
char *insfname, *outsfname, *argv0;
char filterFile[512] = "";
if (argc == 1) {
fprintf(stderr, USAGE);
exit(1);
}
argv0 = argv[0];
while (--argc && **(++argv)=='-') {
++(argv[0]); /* skip over '-' */
switch (*argv[0]) {
case 'a': /* -aaaQuality (old name) */
case 'e': /* -expensive */
largeFilter = TRUE;
if (trace)
printf("Choosing higher quality filter.\n");
break;
case 'b': /* -by factor */
if (--argc)
sscanf(*(++argv),"%lf",&factor);
if (trace)
printf("Sampling-rate conversion factor set to %f.\n",factor);
knowFactor = TRUE;
break;
case 'f': /* -filter filterFile */
if (--argc)
strcpy(filterFile, *++argv);
else
fail("Need to specify filter file name");
if (trace)
printf("Filter file set to %s.\n",filterFile);
break;
case 'l': /* -linearInpterpolation */
linearInterp = TRUE;
if (trace)
printf("Using linear instead of bandlimited interpolation\n");
break;
case 'n': /* -noFilterInterpolation */
interpFilt = FALSE;
if (trace)
printf("Filter-table interpolation disabled.\n");
break;
case 't':
if (*(argv[0]+1) == 'e') { /* -terse */
trace = 0;
break;
}
if (--argc) /* -to srate */
sscanf(*(++argv),"%lf",&newsrate);
if (trace)
printf("Target sampling-rate set to %f.\n",newsrate);
knowFactor = TRUE;
break;
case 'v': /* -version */
printf(resampleVersion);
if (argc == 1)
exit(0);
break;
default:
fprintf(stderr,"Unknown switch -%s\n",argv[0]);
fprintf(stderr,USAGE);
exit(1);
}
}
if (!knowFactor)
fail("Must specify sampling-rate conversion factor via '-to' or '-by' option");
if (argc < 1)
fail("Need to specify input soundfile");
insfname = *argv;
if (argc < 2) {
fprintf(stderr, USAGE);
exit(1);
}
else
outsfname = *++argv;
/* Test whether output file name exists. If so, bail... */
result = stat(outsfname, &statbuf);
if (result != -1)
fails("\"%s\" already exists", outsfname);
if (errno != ENOENT)
fails("Error creating output file (%s)", strerror(errno));
if (trace)
printf("Writing output to \"%s\".\n", outsfname);
/* Open input file and gather info from its header */
// resample-1.8: infd = sndlib_open_read(insfname);
infd = mus_sound_open_input(insfname);
if (infd == -1)
fails("Could not open input file \"%s\"", insfname);
if (NOT_A_SOUND_FILE(mus_header_type()))
fails("\"%s\" is probably not a sound file.", insfname);
nChans = mus_header_chans();
insrate = mus_header_srate();
inCount = mus_header_samples();
inType = mus_header_type(); /* header type (i.e. aiff, wave, etc) (see sndlib.h) */
inFormat = mus_header_format(); /* data format (see sndlib.h) */
inCount /= nChans; /* to get sample frames */
/*
* Set output soundfile format.
* See sndlib.h for supported types (e.g., MUS_RIFF).
*/
outType = inType;
outFormat = inFormat;
/* Compute sampling rate conversion factor, if not specified. */
if (newsrate>0) {
if (factor>0)
fprintf(stderr, "Command-line sampling-rate conversion factor "
"ignored ... the '-to' option overrides the '-by' option.\n");
factor = newsrate / (double)insrate;
if (trace)
printf("Sampling rate conversion factor set to %f\n",factor);
}
if (factor < 0) {
factor = -factor;
factor = GetDouble("Sampling-rate conversion factor",factor,"");
}
if (newsrate <= 0)
newsrate = (int)((double)insrate * factor + 0.5); /* round */
sprintf(comment,"%s -by %f %s%s%s%s%s%s%s %s",argv0,factor,
(largeFilter?"-expensiveFilter ":""),
(strcmp(filterFile,"")==0?"":"-f "),
(strcmp(filterFile,"")==0?"":filterFile),
(strcmp(filterFile,"")==0?"":" "),
(linearInterp? "-linearSigInterp ":""),
(interpFilt? "":"-noFilterInterp "),
insfname, outsfname);
outfd = sndlib_create(outsfname, inType, inFormat, newsrate, nChans, comment);
if (outfd == -1)
fails("Could not create output file \"%s\"", outsfname);
outCount = (int)(factor * (double)inCount + 0.5); /* output frames */
printf("\nStarting Conversion\n");
outCountReal = resample(factor, infd, outfd, inCount, outCount, nChans,
interpFilt, linearInterp, largeFilter, filterFile);
if (outCountReal <= 0)
fail("Conversion factor out of range");
if (trace && (outCount != outCountReal))
fprintf(stderr,
"outCount = %d, outCountReal = %d\n",outCount,outCountReal);
// resample-1.8: sndlib_close(infd, FALSE, 0, 0, 0);
mus_file_close(infd);
/* Output samps already written; just update header and close file. */
// resample-1.8: if (sndlib_close(outfd, 1, outType, outFormat, outCountReal * nChans))
// resample-1.8: fails("Error closing output file (%s)", strerror(errno));
mus_file_close(outfd);
int sound_bytes = outCountReal * nChans * mus_bytes_per_sample(outFormat);
mus_header_change_data_size(outsfname, inType, sound_bytes);
printf("\nConversion Finished: %d output samples.\n\n",outCount);
return(0);
}
|
