ref: 0a66e0fac9021b948fed671c9ec35a09f7d28c0a
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.h"
#include <string.h>
#include <ctype.h>
#include <signal.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");
}
void
st_fail(const char *fmt, ...)
{
va_list args;
extern void cleanup();
fprintf(stderr, "%s: ", myname);
va_start(args, fmt);
vfprintf(stderr, fmt, args);
va_end(args);
fprintf(stderr, "\n");
cleanup();
exit(2);
}
/* Warning: no error checking is done with errstr. Be sure not to
* go over the array limit ourself!
*/
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);
}
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(s1, s2)
char *s1, *s2;
{
while(*s1 && *s2 && (tolower(*s1) == tolower(*s2)))
s1++, s2++;
return *s1 - *s2;
}
/*
* Check that we have a known format suffix string.
*/
void
st_gettype(formp)
ft_t formp;
{
char **list;
int i;
if (! formp->filetype)
st_fail("Must give file type for %s file, either as suffix or with -t option",
formp->filename);
for(i = 0; st_formats[i].names; i++) {
for(list = st_formats[i].names; *list; list++) {
char *s1 = *list, *s2 = formp->filetype;
if (! strcmpcase(s1, s2))
break; /* not a match */
}
if (! *list)
continue;
/* Found it! */
formp->h = &st_formats[i];
return;
}
if (! strcmpcase(formp->filetype, "snd")) {
verbose = 1;
st_report("File type '%s' is used to name several different formats.", formp->filetype);
st_report("If the file came from a Macintosh, it is probably");
st_report("a .ub file with a sample rate of 11025 (or possibly 5012 or 22050).");
st_report("Use the sequence '-t .ub -r 11025 file.snd'");
st_report("If it came from a PC, it's probably a Soundtool file.");
st_report("Use the sequence '-t .sndt file.snd'");
st_report("If it came from a NeXT, it's probably a .au file.");
st_fail("Use the sequence '-t .au file.snd'\n");
}
st_fail("File type '%s' of %s file is not known!",
formp->filetype, formp->filename);
}
/*
* 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_effects[i].name; i++)
{
char *s1 = st_effects[i].name, *s2 = argv[0];
while(*s1 && *s2 && (tolower(*s1) == tolower(*s2)))
s1++, s2++;
if (*s1 || *s2)
continue; /* not a match */
/* Found it! */
effp->name = st_effects[i].name;
effp->h = &st_effects[i];
optind = 1;
while (optind < argc)
{
for (i = 0; st_effects[i].name; i++)
{
char *s1 = st_effects[i].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_effects[i].name; i++) {
char *s1 = st_effects[i].name, *s2 = effect_name;
while(*s1 && *s2 && (tolower(*s1) == tolower(*s2)))
s1++, s2++;
if (*s1 || *s2)
continue; /* not a match */
/* Found it! */
effp->name = st_effects[i].name;
effp->h = &st_effects[i];
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, ft_t in, ft_t out, int effect_mask)
{
int i;
effp->ininfo = in->info;
effp->ininfo = in->info;
effp->outinfo = out->info;
effp->outinfo = out->info;
for(i = 0; i < 8; i++) {
memcpy(&effp->loops[i], &in->loops[i], sizeof(struct st_loopinfo));
memcpy(&effp->loops[i], &in->loops[i], sizeof(struct st_loopinfo));
}
effp->instr = in->instr;
effp->instr = in->instr;
if (in->info.channels != out->info.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->info.channels;
else
effp->outinfo.channels = in->info.channels;
}
}
if (in->info.rate != out->info.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->info.rate;
else
effp->outinfo.rate = in->info.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;
}
/*
* File format routines
*/
void st_copyformat(ft, ft2)
ft_t ft, ft2;
{
int noise = 0, i;
double factor;
if (ft2->info.rate == 0) {
ft2->info.rate = ft->info.rate;
noise = 1;
}
if (ft2->info.size == -1) {
ft2->info.size = ft->info.size;
noise = 1;
}
if (ft2->info.encoding == -1) {
ft2->info.encoding = ft->info.encoding;
noise = 1;
}
if (ft2->info.channels == -1) {
ft2->info.channels = ft->info.channels;
noise = 1;
}
if (ft2->comment == NULL) {
ft2->comment = ft->comment;
noise = 1;
}
/*
* copy loop info, resizing appropriately
* it's in samples, so # channels don't matter
*/
factor = (double) ft2->info.rate / (double) ft->info.rate;
for(i = 0; i < ST_MAX_NLOOPS; i++) {
ft2->loops[i].start = ft->loops[i].start * factor;
ft2->loops[i].length = ft->loops[i].length * factor;
ft2->loops[i].count = ft->loops[i].count;
ft2->loops[i].type = ft->loops[i].type;
}
/* leave SMPTE # alone since it's absolute */
ft2->instr = ft->instr;
}
void st_cmpformats(ft, ft2)
ft_t ft, ft2;
{
}
/* check that all settings have been given */
void st_checkformat(ft)
ft_t ft;
{
if (ft->info.rate == 0)
st_fail("Sampling rate for %s file was not given\n", ft->filename);
if ((ft->info.rate < 100) || (ft->info.rate > 999999L))
st_fail("Sampling rate %lu for %s file is bogus\n",
ft->info.rate, ft->filename);
if (ft->info.size == -1)
st_fail("Data size was not given for %s file\nUse one of -b/-w/-l/-f/-d/-D", ft->filename);
if (ft->info.encoding == -1 && ft->info.size != ST_SIZE_FLOAT)
st_fail("Data encoding was not given for %s file\nUse one of -s/-u/-U/-A", ft->filename);
/* it's so common, might as well default */
if (ft->info.channels == -1)
ft->info.channels = 1;
/* st_fail("Number of output channels was not given for %s file",
ft->filename); */
}
static ft_t ft_queue[2];
void
sigint(s)
int s;
{
if (s == SIGINT) {
if (ft_queue[0])
ft_queue[0]->file.eof = 1;
if (ft_queue[1])
ft_queue[1]->file.eof = 1;
}
}
void
sigintreg(ft)
ft_t ft;
{
if (ft_queue[0] == 0)
ft_queue[0] = ft;
else
ft_queue[1] = ft;
signal(SIGINT, sigint);
}