ref: abdc7c28939886d3c81b74bc16cc0a42fe9a37dd
dir: /src/util.c/
/*
* July 5, 1991
* Copyright 1991 Lance Norskog And Sundry Contributors
* This source code is freely redistributable and may be used for
* any purpose. This copyright notice must be maintained.
* Lance Norskog And Sundry Contributors are not responsible for
* the consequences of using this software.
*/
#include "st_i.h"
#include <string.h>
#include <ctype.h>
#ifdef __STDC__
#include <stdarg.h>
#else
#include <varargs.h>
#endif
/*
* util.c.
* Incorporate Jimen Ching's fixes for real library operation: Aug 3, 1994.
* Redo all work from scratch, unfortunately.
* Separate out all common variables used by effects & handlers,
* and utility routines for other main programs to use.
*/
/* export flags */
/* FIXME: To be moved inside of fileop structure per handler. */
int verbose = 0; /* be noisy on stderr */
/* FIXME: These functions are user level concepts. Move them outside
* the ST library.
*/
char *myname = 0;
void st_report(const char *fmt, ...)
{
va_list args;
if (! verbose)
return;
fprintf(stderr, "%s: ", myname);
va_start(args, fmt);
vfprintf(stderr, fmt, args);
va_end(args);
fprintf(stderr, "\n");
}
void st_warn(const char *fmt, ...)
{
va_list args;
fprintf(stderr, "%s: ", myname);
va_start(args, fmt);
vfprintf(stderr, fmt, args);
va_end(args);
fprintf(stderr, "\n");
}
/* Warning: This function is depricated. st_fail_errno() is
* the preferred way so that applications can control printing
* to their choice; not just stderr.
*/
void st_fail(const char *fmt, ...)
{
va_list args;
fprintf(stderr, "%s: ", myname);
va_start(args, fmt);
vfprintf(stderr, fmt, args);
va_end(args);
fprintf(stderr, "\n");
}
/* Warning: no error checking is done with errstr. Be sure not to
* go over the array limit ourself! vsnprint does not seem to be
* on all platforms so not using that.
*/
void st_fail_errno(ft_t ft, int st_errno, const char *fmt, ...)
{
va_list args;
ft->st_errno = st_errno;
va_start(args, fmt);
vsprintf(ft->st_errstr, fmt, args);
va_end(args);
ft->st_errstr[255] = '\0';
}
int st_is_bigendian(void)
{
int b;
char *p;
b = 1;
p = (char *) &b;
if (!*p)
return 1;
else
return 0;
}
int st_is_littleendian(void)
{
int b;
char *p;
b = 1;
p = (char *) &b;
if (*p)
return 1;
else
return 0;
}
int strcmpcase(char *s1, char *s2)
{
while(*s1 && *s2 && (tolower(*s1) == tolower(*s2)))
s1++, s2++;
return *s1 - *s2;
}
/*
* Check that we have a known format suffix string.
*/
int st_gettype(ft_t formp)
{
char **list;
int i;
const st_format_t *f;
if (! formp->filetype){
st_fail_errno(formp,
ST_EFMT,
"Filetype was not specified");
return(ST_EFMT);
}
for(i = 0; st_format_fns[i]; i++) {
f = st_format_fns[i]();
for(list = f->names; *list; list++) {
char *s1 = *list, *s2 = formp->filetype;
if (! strcmpcase(s1, s2))
break; /* not a match */
}
if (! *list)
continue;
/* Found it! */
formp->h = f;
return ST_SUCCESS;
}
st_fail_errno(formp, ST_EFMT, "File type '%s' is not known",
formp->filetype);
return ST_EFMT;
}
/*
* Check that we have a known effect name. If found, copy name of
* effect into structure and place a pointer to internal data.
* Returns -1 on error else it turns the total number of arguments
* that should be passed to this effects getopt() function.
*/
int st_geteffect_opt(eff_t effp, int argc, char **argv)
{
int i, optind;
for(i = 0; st_effect_fns[i]; i++)
{
char *s1, *s2;
const st_effect_t *e = st_effect_fns[i]();
if (!e || !e->name)
continue;
s1 = e->name;
s2 = argv[0];
while(*s1 && *s2 && (tolower(*s1) == tolower(*s2)))
s1++, s2++;
if (*s1 || *s2)
continue; /* not a match */
/* Found it! */
effp->name = e->name;
effp->h = e;
optind = 1;
while (optind < argc)
{
for (i = 0; st_effect_fns[i]; i++)
{
const st_effect_t *e = st_effect_fns[i]();
char *s1 = e->name, *s2 = argv[optind];
while (*s1 && *s2 && (tolower(*s1) == tolower(*s2)))
s1++, s2++;
if (*s1 || *s2)
continue;
/* Found it! */
return (optind - 1);
}
/* Didn't find a match, try the next argument. */
optind++;
}
/*
* No matches found, all the following arguments are
* for this effect passed in.
*/
return (optind - 1);
}
return (ST_EOF);
}
/*
* Check that we have a known effect name. If found, copy name of
* effect into structure and place a pointer to internal data.
* Returns -1 on on failure.
*/
int st_geteffect(eff_t effp, char *effect_name)
{
int i;
for(i = 0; st_effect_fns[i]; i++) {
char *s1, *s2;
const st_effect_t *e = st_effect_fns[i]();
if (!e || !e->name)
continue;
s1 = e->name;
s2 = effect_name;
while(*s1 && *s2 && (tolower(*s1) == tolower(*s2)))
s1++, s2++;
if (*s1 || *s2)
continue; /* not a match */
/* Found it! */
effp->name = e->name;
effp->h = e;
return ST_SUCCESS;
}
return (ST_EOF);
}
/*
* Check that we have a known effect name. Return ST_SUCESS if found, else
* return ST_EOF.
*/
int st_checkeffect(char *effect_name)
{
int i;
for(i = 0; st_effect_fns[i]; i++) {
char *s1, *s2;
const st_effect_t *e = st_effect_fns[i]();
if (!e || !e->name)
continue;
s1 = e->name;
s2 = effect_name;
while(*s1 && *s2 && (tolower(*s1) == tolower(*s2)))
s1++, s2++;
if (*s1 || *s2)
continue; /* not a match */
return ST_SUCCESS;
}
return (ST_EOF);
}
/*
* Copy input and output signal info into effect structures.
* Must pass in a bitmask containing info of wheither ST_EFF_CHAN
* or ST_EFF_RATE has been used previously on this effect stream.
* If not running multiple effects then just pass in a value of 0.
*
* Return value is the same mask plus addition of ST_EFF_CHAN or
* ST_EFF_RATE if it was used in this effect. That make this
* return value can be passed back into this function in future
* calls.
*/
int st_updateeffect(eff_t effp, st_signalinfo_t *in, st_signalinfo_t *out,
int effect_mask)
{
effp->ininfo = *in;
effp->outinfo = *out;
if (in->channels != out->channels)
{
/* Only effects with ST_EFF_CHAN flag can actually handle
* outputing a different number of channels then the input.
*/
if (!(effp->h->flags & ST_EFF_CHAN))
{
/* If this effect is being ran before a ST_EFF_CHAN effect
* then effect's output is the same as the input file. Else its
* input contains same number of channels as the output
* file.
*/
if (effect_mask & ST_EFF_CHAN)
effp->ininfo.channels = out->channels;
else
effp->outinfo.channels = in->channels;
}
}
if (in->rate != out->rate)
{
/* Only the ST_EFF_RATE effect can handle an input that
* is a different sample rate then the output.
*/
if (!(effp->h->flags & ST_EFF_RATE))
{
if (effect_mask & ST_EFF_RATE)
effp->ininfo.rate = out->rate;
else
effp->outinfo.rate = in->rate;
}
}
if (effp->h->flags & ST_EFF_CHAN)
effect_mask |= ST_EFF_CHAN;
if (effp->h->flags & ST_EFF_RATE)
effect_mask |= ST_EFF_RATE;
return effect_mask;
}
/*
* st_parsesamples
*
* Parse a string for # of samples. If string ends with a 's'
* then string is interrepted as a user calculated # of samples.
* If string contains ':' or '.' or if it ends with a 't' then its
* treated as an amount of time. This is converted into seconds and
* fraction of seconds and then use the sample rate to calculate
* # of samples.
* Returns ST_EOF on error.
*/
int st_parsesamples(st_rate_t rate, char *str, st_size_t *samples, char def)
{
int found_samples = 0, found_time = 0;
int time;
long long_samples;
float frac = 0;
if (strchr(str, ':') || strchr(str, '.') || str[strlen(str)-1] == 't')
found_time = 1;
else if (str[strlen(str)-1] == 's')
found_samples = 1;
if (found_time || (def == 't' && !found_samples))
{
*samples = 0;
while(1)
{
if (sscanf(str, "%d", &time) != 1)
return ST_EOF;
*samples += time;
while (*str != ':' && *str != '.' && *str != 0)
str++;
if (*str == '.' || *str == 0)
break;
/* Skip past ':' */
str++;
*samples *= 60;
}
if (*str == '.')
{
if (sscanf(str, "%f", &frac) != 1)
return ST_EOF;
}
*samples *= rate;
*samples += (rate * frac);
return ST_SUCCESS;
}
if (found_samples || (def == 's' && !found_time))
{
if (sscanf(str, "%ld", &long_samples) != 1)
return ST_EOF;
*samples = long_samples;
return ST_SUCCESS;
}
return ST_EOF;
}