/*
* Copyright 1992 by Jutta Degener and Carsten Bormann, Technische
* Universitaet Berlin. See the accompanying file "COPYRIGHT" for
* details. THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
*/
/* $Header: /tmp_amd/presto/export/kbs/jutta/src/gsm/RCS/toast.c,v 1.8 1996/07/02 10:41:04 jutta Exp $ */
#include "toast.h"
/* toast -- lossy sound compression using the gsm library.
*/
char * progname;
int f_decode = 0; /* decode rather than encode (-d) */
int f_cat = 0; /* write to stdout; implies -p (-c) */
int f_force = 0; /* don't ask about replacements (-f) */
int f_precious = 0; /* avoid deletion of original (-p) */
int f_fast = 0; /* use faster fpt algorithm (-F) */
int f_verbose = 0; /* debugging (-V) */
int f_ltp_cut = 0; /* LTP cut-off margin (-C) */
struct stat instat; /* stat (inname) */
FILE *in, *out;
char *inname, *outname;
/*
* The function (*output)() writes a frame of 160 samples given as
* 160 signed 16 bit values (gsm_signals) to <out>.
* The function (*input)() reads one such frame from <in>.
* The function (*init_output)() begins output (e.g. writes a header).,
* The function (*init_input)() begins input (e.g. skips a header).
*
* There are different versions of input, output, init_input and init_output
* for different formats understood by toast; which ones are used
* depends on the command line arguments and, in their absence, the
* filename; the fallback is #defined in toast.h
*
* The specific implementations of input, output, init_input and init_output
* for a format `foo' live in toast_foo.c.
*/
int (*output ) P((gsm_signal *)),
(*input ) P((gsm_signal *));
int (*init_input) P((void)),
(*init_output) P((void));
static int generic_init P0() { return 0; } /* NOP */
struct fmtdesc {
char * name, * longname, * suffix;
int (* init_input ) P((void)),
(* init_output) P((void));
int (* input ) P((gsm_signal * )),
(* output) P((gsm_signal * ));
} f_audio = {
"audio",
"8 kHz, 8 bit u-law encoding with Sun audio header", ".au",
audio_init_input,
audio_init_output,
ulaw_input,
ulaw_output
}, f_ulaw = {
"u-law", "plain 8 kHz, 8 bit u-law encoding", ".u",
generic_init,
generic_init,
ulaw_input,
ulaw_output
}, f_alaw = {
"A-law", "8 kHz, 8 bit A-law encoding", ".A",
generic_init,
generic_init,
alaw_input,
alaw_output
}, f_linear = {
"linear",
"16 bit (13 significant) signed 8 kHz signal", ".l",
generic_init,
generic_init,
linear_input,
linear_output
};
struct fmtdesc * alldescs[] = {
&f_audio,
&f_alaw,
&f_ulaw,
&f_linear,
(struct fmtdesc *)NULL
};
#define DEFAULT_FORMAT f_ulaw /* default audio format, others */
/* are: f_alaw,f_audio,f_linear */
struct fmtdesc * f_format = 0;
/*
* basename + suffix of a pathname
*/
static char * endname P1((name), char * name)
{
if (name) {
char * s = strrchr(name, '/');
if (s && s[1]) name = s + 1;
}
return name;
}
/*
* Try to figure out what we're supposed to do from the argv[0], if
* any, and set the parameters accordingly.
*/
static void parse_argv0 P1((av0), char * av0 )
{
int l;
progname = av0 = endname(av0 ? av0 : "toast");
/* If the name starts with `un', we want to decode, not code.
* If the name ends in `cat', we want to write to stdout,
* and decode as well.
*/
if (!strncmp(av0, "un", 2)) f_decode = 1;
if ( (l = strlen(av0)) >= 3 /* strlen("cat") */
&& !strcmp( av0 + l - 3, "cat" )) f_cat = f_decode = 1;
}
/*
* Check whether the name (possibly generated by appending
* .gsm to something else) is short enough for this system.
*/
static int length_okay P1((name), char * name)
{
long max_filename_length = 0;
char * end;
/* If our _pathname_ is too long, we'll usually not be
* able to open the file at all -- don't worry about that.
*
* But if the _filename_ is too long, there is danger of
* silent truncation on some systems, which results
* in the target replacing the source!
*/
if (!name) return 0;
end = endname(name);
#ifdef NAME_MAX
max_filename_length = NAME_MAX;
#else
#ifdef _PC_NAME_MAX
#ifdef USE_PATHCONF
{ char * s, tmp;
/* s = dirname(name)
*/
if ((s = end) > name) {
if (s > name + 1) s--;
tmp = s;
*s = 0;
}
errno = 0;
max_filename_length = pathconf(s > name ? name : ".",
_PC_NAME_MAX);
if (max_filename_length == -1 && errno) {
perror( s > name ? name : "." );
fprintf(stderr,
"%s: cannot get dynamic filename length limit for %s.\n",
progname, s > name ? name : ".");
return 0;
}
if (s > name) *s = tmp;
}
#endif /* USE_PATHCONF */
#endif /* _PC_NAME_MAX */
#endif /* !NAME_MAX */
if (max_filename_length > 0 && strlen(end) > max_filename_length) {
fprintf(stderr,
"%s: filename \"%s\" is too long (maximum is %ld)\n",
progname, endname(name), max_filename_length );
return 0;
}
return 1;
}
/*
* Return a pointer the suffix of a string, if any.
* A suffix alone has no suffix, an empty suffix can not be had.
*/
static char * suffix P2((name, suf), char *name, char * suf)
{
size_t nlen = strlen(name);
size_t slen = strlen(suf);
if (!slen || nlen <= slen) return (char *)0;
name += nlen - slen;
return memcmp(name, suf, slen) ? (char *)0 : name;
}
static void catch_signals P1((fun), SIGHANDLER_T (*fun) ())
{
#ifdef SIGHUP
signal( SIGHUP, fun );
#endif
#ifdef SIGINT
signal( SIGINT, fun );
#endif
#ifdef SIGPIPE
signal( SIGPIPE, fun );
#endif
#ifdef SIGTERM
signal( SIGTERM, fun );
#endif
#ifdef SIGXFSZ
signal( SIGXFSZ, fun );
#endif
}
static SIGHANDLER_T onintr P0()
{
char * tmp = outname;
#ifdef HAS_SYSV_SIGNALS
catch_signals( SIG_IGN );
#endif
outname = (char *)0;
if (tmp) (void)unlink(tmp);
exit(1);
}
/*
* Allocate some memory and complain if it fails.
*/
static char * emalloc P1((len), size_t len)
{
char * s;
if (!(s = malloc(len))) {
fprintf(stderr, "%s: failed to malloc %d bytes -- abort\n",
progname, (int)len);
onintr();
exit(1);
}
return s;
}
static char* normalname P3((name, want, cut), char *name, char *want,char *cut)
{
size_t maxlen;
char * s, * p;
p = (char *)0;
if (!name) return p;
maxlen = strlen(name) + 1 + strlen(want) + strlen(cut);
p = strcpy(emalloc(maxlen), name);
if ((s = suffix(p, cut)) != 0) strcpy(s, want);
else if (*want && !suffix(p, want)) strcat(p, want);
return p;
}
/*
* Generate a `plain' (non-encoded) name from a given name.
*/
static char * plainname P1((name), char *name)
{
return normalname(name, "", SUFFIX_TOASTED );
}
/*
* Generate a `code' name from a given name.
*/
static char * codename P1((name), char *name)
{
return normalname( name, SUFFIX_TOASTED, "" );
}
/*
* If we're supposed to ask (fileno (stderr) is a tty, and f_force not
* set), ask the user whether to overwrite a file or not.
*/
static int ok_to_replace P1(( name ), char * name)
{
int reply, c;
if (f_force) return 1; /* YES, do replace */
if (!isatty(fileno(stderr))) return 0; /* NO, don't replace */
fprintf(stderr,
"%s already exists; do you wish to overwrite %s (y or n)? ",
name, name);
fflush(stderr);
for (c = reply = getchar(); c != '\n' && c != EOF; c = getchar()) ;
if (reply == 'y') return 1;
fprintf(stderr, "\tnot overwritten\n");
return 0;
}
static void update_mode P0()
{
if (!instat.st_nlink) return; /* couldn't stat in */
#ifdef HAS_FCHMOD
if (fchmod(fileno(out), instat.st_mode & 07777)) {
perror(outname);
fprintf(stderr, "%s: could not change file mode of \"%s\"\n",
progname, outname);
}
#else
#ifdef HAS_CHMOD
if (outname && chmod(outname, instat.st_mode & 07777)) {
perror(outname);
fprintf(stderr, "%s: could not change file mode of \"%s\"\n",
progname, outname);
}
#endif /* HAS_CHMOD */
#endif /* HAS_FCHMOD */
}
static void update_own P0()
{
if (!instat.st_nlink) return; /* couldn't stat in */
#ifdef HAS_FCHOWN
(void)fchown(fileno(out), instat.st_uid, instat.st_gid);
#else
#ifdef HAS_CHOWN
(void)chown(outname, instat.st_uid, instat.st_gid);
#endif /* HAS_CHOWN */
#endif /* HAS_FCHOWN */
}
static void update_times P0()
{
if (!instat.st_nlink) return; /* couldn't stat in */
#ifdef HAS_UTIMES
if (outname) {
struct timeval tv[2];
tv[0].tv_sec = instat.st_atime;
tv[1].tv_sec = instat.st_mtime;
tv[0].tv_usec = tv[1].tv_usec = 0;
(void) utimes(outname, tv);
}
#else
#ifdef HAS_UTIME
if (outname) {
#ifdef HAS_UTIMBUF
struct utimbuf ut;
ut.actime = instat.st_atime;
ut.modtime = instat.st_mtime;
# ifdef HAS_UTIMEUSEC
ut.acusec = instat.st_ausec;
ut.modusec = instat.st_musec;
# endif /* HAS_UTIMEUSEC */
(void) utime(outname, &ut);
#else /* UTIMBUF */
time_t ut[2];
ut[0] = instat.st_atime;
ut[1] = instat.st_mtime;
(void) utime(outname, ut);
#endif /* UTIMBUF */
}
#endif /* HAS_UTIME */
#endif /* HAS_UTIMES */
}
static int okay_as_input P3((name,f,st), char* name, FILE* f, struct stat * st)
{
# ifdef HAS_FSTAT
if (fstat(fileno(f), st) < 0)
# else
if (stat(name, st) < 0)
# endif
{
perror(name);
fprintf(stderr, "%s: cannot stat \"%s\"\n", progname, name);
return 0;
}
if (!S_ISREG(st->st_mode)) {
fprintf(stderr,
"%s: \"%s\" is not a regular file -- unchanged.\n",
progname, name);
return 0;
}
if (st->st_nlink > 1 && !f_cat && !f_precious) {
fprintf(stderr,
"%s: \"%s\" has %d other link%s -- unchanged.\n",
progname, name, (int)(st->st_nlink - 1),
"s" + (st->st_nlink <= 2));
return 0;
}
return 1;
}
static void prepare_io P1(( desc), struct fmtdesc * desc)
{
output = desc->output;
input = desc->input;
init_input = desc->init_input;
init_output = desc->init_output;
}
static struct fmtdesc * grok_format P1((name), char * name)
{
char * c;
struct fmtdesc ** f;
if (name) {
c = plainname(name);
for (f = alldescs; *f; f++) {
if ( (*f)->suffix
&& *(*f)->suffix
&& suffix(c, (*f)->suffix)) {
free(c);
return *f;
}
}
free(c);
}
return (struct fmtdesc *)0;
}
static int open_input P2((name, st), char * name, struct stat * st)
{
struct fmtdesc * f = f_format;
st->st_nlink = 0; /* indicates `undefined' value */
if (!name) {
inname = (char *)NULL;
in = stdin;
#ifdef HAS__FSETMODE
_fsetmode(in, "b");
#endif
}
else {
if (f_decode) inname = codename(name);
else {
if (!f_cat && suffix(name, SUFFIX_TOASTED)) {
fprintf(stderr,
"%s: %s already has \"%s\" suffix -- unchanged.\n",
progname, name, SUFFIX_TOASTED );
return 0;
}
inname = strcpy(emalloc(strlen(name)+1), name);
}
if (!(in = fopen(inname, READ))) {
perror(inname); /* not guaranteed to be valid here */
fprintf(stderr, "%s: cannot open \"%s\" for reading\n",
progname, inname);
return 0;
}
if (!okay_as_input(inname, in, st)) return 0;
if (!f) f = grok_format(inname);
}
prepare_io( f ? f : & DEFAULT_FORMAT );
return 1;
}
static int open_output P1((name), char *name)
{
if (!name || f_cat) {
out = stdout;
outname = (char *)NULL;
#ifdef HAS__FSETMODE
_fsetmode(out, "b");
#endif
}
else {
int outfd = -1;
char * o;
o = (*(f_decode ? plainname : codename))(name);
if (!length_okay(o)) return 0;
if ((outfd = open(o, O_WRITE_EXCL, 0666)) >= 0)
out = fdopen(outfd, WRITE);
else if (errno != EEXIST) out = (FILE *)NULL;
else if (ok_to_replace(o)) out = fopen(o, WRITE);
else return 0;
if (!out) {
perror(o);
fprintf(stderr,
"%s: can't open \"%s\" for writing\n",
progname, o);
if (outfd >= 0) (void)close(outfd);
return 0;
}
outname = o;
}
return 1;
}
static int process_encode P0()
{
gsm r;
gsm_signal s[ 160 ];
gsm_frame d;
int cc;
if (!(r = gsm_create())) {
perror(progname);
return -1;
}
(void)gsm_option(r, GSM_OPT_FAST, &f_fast);
(void)gsm_option(r, GSM_OPT_VERBOSE, &f_verbose);
(void)gsm_option(r, GSM_OPT_LTP_CUT, &f_ltp_cut);
while ((cc = (*input)(s)) > 0) {
if (cc < sizeof(s) / sizeof(*s))
memset((char *)(s+cc), 0, sizeof(s)-(cc * sizeof(*s)));
gsm_encode(r, s, d);
if (fwrite((char *)d, sizeof(d), 1, out) != 1) {
perror(outname ? outname : "stdout");
fprintf(stderr, "%s: error writing to %s\n",
progname, outname ? outname : "stdout");
gsm_destroy(r);
return -1;
}
}
if (cc < 0) {
perror(inname ? inname : "stdin");
fprintf(stderr, "%s: error reading from %s\n",
progname, inname ? inname : "stdin");
gsm_destroy(r);
return -1;
}
gsm_destroy(r);
return 0;
}
static int process_decode P0()
{
gsm r;
gsm_frame s;
gsm_signal d[ 160 ];
int cc;
if (!(r = gsm_create())) { /* malloc failed */
perror(progname);
return -1;
}
(void)gsm_option(r, GSM_OPT_FAST, &f_fast);
(void)gsm_option(r, GSM_OPT_VERBOSE, &f_verbose);
while ((cc = fread(s, 1, sizeof(s), in)) > 0) {
if (cc != sizeof(s)) {
if (cc >= 0) fprintf(stderr,
"%s: incomplete frame (%d byte%s missing) from %s\n",
progname, (int)(sizeof(s) - cc),
"s" + (sizeof(s) - cc == 1),
inname ? inname : "stdin" );
gsm_destroy(r);
errno = 0;
return -1;
}
if (gsm_decode(r, s, d)) {
fprintf(stderr, "%s: bad frame in %s\n",
progname, inname ? inname : "stdin");
gsm_destroy(r);
errno = 0;
return -1;
}
if ((*output)(d) < 0) {
perror(outname);
fprintf(stderr, "%s: error writing to %s\n",
progname, outname);
gsm_destroy(r);
return -1;
}
}
if (cc < 0) {
perror(inname ? inname : "stdin" );
fprintf(stderr, "%s: error reading from %s\n", progname,
inname ? inname : "stdin");
gsm_destroy(r);
return -1;
}
gsm_destroy(r);
return 0;
}
static int process P1((name), char * name)
{
out = (FILE *)0;
in = (FILE *)0;
outname = (char *)0;
inname = (char *)0;
if (!open_input(name, &instat) || !open_output(name))
goto err;
if ((*(f_decode ? init_output : init_input))()) {
fprintf(stderr, "%s: error %s %s\n",
progname,
f_decode ? "writing header to" : "reading header from",
f_decode ? (outname ? outname : "stdout")
: (inname ? inname : "stdin"));
goto err;
}
if ((*(f_decode ? process_decode : process_encode))())
goto err;
if (fflush(out) < 0 || ferror(out)) {
perror(outname ? outname : "stdout");
fprintf(stderr, "%s: error writing \"%s\"\n", progname,
outname ? outname:"stdout");
goto err;
}
if (out != stdout) {
update_times();
update_mode ();
update_own ();
if (fclose(out) < 0) {
perror(outname);
fprintf(stderr, "%s: error writing \"%s\"\n",
progname, outname);
goto err;
}
if (outname != name) free(outname);
outname = (char *)0;
}
out = (FILE *)0;
if (in != stdin) {
(void)fclose(in), in = (FILE *)0;
if (!f_cat && !f_precious) {
if (unlink(inname) < 0) {
perror(inname);
fprintf(stderr,
"%s: source \"%s\" not deleted.\n",
progname, inname);
}
goto err;
}
if (inname != name) free(inname);
inname = (char *)0;
}
return 0;
/*
* Error handling and cleanup.
*/
err:
if (out && out != stdout) {
(void)fclose(out), out = (FILE *)0;
if (unlink(outname) < 0 && errno != ENOENT && errno != EINTR) {
perror(outname);
fprintf(stderr, "%s: could not unlink \"%s\"\n",
progname, outname);
}
}
if (in && in != stdin) (void)fclose(in), in = (FILE *)0;
if (inname && inname != name) free(inname);
if (outname && outname != name) free(outname);
return -1;
}
static void version P0()
{
printf( "%s 1.0, version %s\n",
progname,
"$Id: toast.c,v 1.8 1996/07/02 10:41:04 jutta Exp $" );
}
static void help P0()
{
printf("Usage: %s [-fcpdhvaulsFC] [files...]\n", progname);
printf("\n");
printf(" -f force Replace existing files without asking\n");
printf(" -c cat Write to stdout, do not remove source files\n");
printf(" -d decode Decode data (default is encode)\n");
printf(" -p precious Do not delete the source\n");
printf("\n");
printf(" -u u-law Force 8 kHz/8 bit u-law in/output format\n");
printf(" -s sun .au Force Sun .au u-law in/output format\n");
printf(" -a A-law Force 8 kHz/8 bit A-law in/output format\n");
printf(" -l linear Force 16 bit linear in/output format\n");
printf("\n");
printf(" -F fast Sacrifice conformance to performance\n");
printf(" -C cutoff Ignore most samples during LTP\n");
printf(" -v version Show version information\n");
printf(" -h help Print this text\n");
printf("\n");
}
static void set_format P1((f), struct fmtdesc * f)
{
if (f_format && f_format != f) {
fprintf( stderr,
"%s: only one of -[uals] is possible (%s -h for help)\n",
progname, progname);
exit(1);
}
f_format = f;
}
int main P2((ac, av), int ac, char **av)
{
int opt;
extern int optind;
parse_argv0(*av);
while ((opt = getopt(ac, av, "fcdpvhuaslVFC:")) != EOF) switch (opt) {
case 'd': f_decode = 1; break;
case 'f': f_force = 1; break;
case 'c': f_cat = 1; break;
case 'p': f_precious = 1; break;
case 'F': f_fast = 1; break;
case 'C': f_ltp_cut = 100; break;
#ifndef NDEBUG
case 'V': f_verbose = 1; break; /* undocumented */
#endif
case 'u': set_format( &f_ulaw ); break;
case 'l': set_format( &f_linear ); break;
case 'a': set_format( &f_alaw ); break;
case 's': set_format( &f_audio ); break;
case 'v': version(); exit(0);
case 'h': help(); exit(0);
default:
fprintf(stderr,
"Usage: %s [-fcpdhvuaslFC] [files...] (-h for help)\n",
progname);
exit(1);
}
f_precious |= f_cat;
av += optind;
ac -= optind;
catch_signals(onintr);
if (ac <= 0) process( (char *)0 );
else while (ac--) process( *av++ );
exit(0);
}