ref: 7cfe6fdb10ec6fe6cb9c7e80b28df0ed9abfd1e5
dir: /src/sox.c/
/*
* Sox - The Swiss Army Knife of Audio Manipulation.
*
* This is the main function for the command line sox program.
*
* 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.
*
* Change History:
*
* June 1, 1998 - Chris Bagwell (cbagwell@sprynet.com)
* Added patch to get volume working again. Based on patch sent from
* Matija Nalis <mnalis@public.srce.hr>.
* Added command line switches to force format to ADPCM or GSM.
*
* September 12, 1998 - Chris Bagwell (cbagwell@sprynet.com)
* Reworked code that handled effects. Wasn't correctly draining
* stereo effects and a few other problems.
* Made command usage (-h) show supported effects and file formats.
* (this is partially from a patch by Leigh Smith
* leigh@psychokiller.dialix.oz.au).
*
*/
#include "st.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h> /* for malloc() */
#include <errno.h>
#include <sys/types.h> /* for fstat() */
#include <sys/stat.h> /* for fstat() */
#ifdef HAVE_UNISTD_H
#include <unistd.h> /* for unlink() */
#endif
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#else
#ifndef HAVE_GETOPT
int getopt(int,char **,char *);
extern char *optarg;
extern int optind;
#endif
#endif
#if defined(VMS)
#define LASTCHAR ']'
#elif defined(DOS) || defined(WIN32)
#define LASTCHAR '\\'
#else
#define LASTCHAR '/'
#endif
/*
* SOX main program.
*
* Rewrite for new nicer option syntax. July 13, 1991.
* Rewrite for separate effects library. Sep. 15, 1991.
* Incorporate Jimen Ching's fixes for real library operation: Aug 3, 1994.
* Rewrite for multiple effects: Aug 24, 1994.
*/
static int dovolume = 0; /* User wants volume change */
static double volume = 1.0; /* Linear volume change */
static int clipped = 0; /* Volume change clipping errors */
static int writing = 0; /* are we writing to a file? */
static int soxpreview = 0; /* preview mode */
static LONG ibufl[BUFSIZ/2]; /* Left/right interleave buffers */
static LONG ibufr[BUFSIZ/2];
static LONG obufl[BUFSIZ/2];
static LONG obufr[BUFSIZ/2];
/* local forward declarations */
static void init(void);
static void doopts(int, char **);
static void usage(char *) NORET;
static int filetype(int);
static void process(void);
static void statistics(void);
static LONG volumechange(LONG *buf, LONG ct, double vol);
static void checkeffect(void);
static int flow_effect(int);
static int drain_effect(int);
static struct st_soundstream informat, outformat;
static ft_t ft;
/* We parse effects into a temporary effects table and then place into
* the real effects table. This makes it easier to reorder some effects
* as needed. For instance, we can run a resampling effect before
* converting a mono file to stereo. This allows the resample to work
* on half the data.
*
* Real effects table only needs to be 2 entries bigger then the user
* specified table. This is because at most we will need to add
* a resample effect and an channel averaging effect.
*/
#define MAX_EFF 16
#define MAX_USER_EFF 14
/*
* In efftab's, location 0 is always the input stream.
*
* If one was to support effects for quad-channel files, there would
* need to be an effect tabel for each channel.
*/
static struct st_effect efftab[MAX_EFF]; /* left/mono channel effects */
static struct st_effect efftabR[MAX_EFF];/* right channel effects */
static int neffects; /* # of effects to run on data */
static struct st_effect user_efftab[MAX_USER_EFF];
static int nuser_effects;
static char *ifile, *ofile;
int main(argc, argv)
int argc;
char **argv;
{
int argc_effect;
myname = argv[0];
init();
ifile = ofile = NULL;
/* Get input format options */
ft = &informat;
clipped = 0;
doopts(argc, argv);
/* Get input file */
if (optind >= argc)
usage("No input file?");
ifile = argv[optind];
if (! strcmp(ifile, "-"))
ft->fp = stdin;
else if ((ft->fp = fopen(ifile, READBINARY)) == NULL)
st_fail("Can't open input file '%s': %s",
ifile, strerror(errno));
ft->filename = ifile;
#if defined(DUMB_FILESYSTEM)
ft->seekable = 0;
#else
ft->seekable = (filetype(fileno(informat.fp)) == S_IFREG);
#endif
optind++;
/* If more arguments are left then look for -e to see if */
/* no output file is used, then just do an effect */
if (optind < argc && strcmp(argv[optind], "-e"))
writing = 1;
else if (optind < argc) {
writing = 0;
optind++; /* Move passed -e */
}
else
writing = 1; /* No arguments left but let next check fail */
/* Get output format options */
ft = &outformat;
doopts(argc, argv);
/* Find and save output filename, if writing to file */
if (writing) {
/* Get output file */
if (optind >= argc)
usage("No output file?");
ofile = argv[optind];
ft->filename = ofile;
/* Move passed filename */
optind++;
/* Hold off on opening file until the very last minute.
* This allows us to verify header in input files are
* what they should be and parse effect command lines.
* That way if anything is found invalid, we will abort
* without truncating any existing file that has the same
* output filename.
*/
}
/* Loop through the reset of the arguments looking for effects */
nuser_effects = 0;
while (optind < argc)
{
if (nuser_effects >= MAX_USER_EFF)
{
st_fail("Sorry, too many effects specified.\n");
}
argc_effect = st_geteffect_opt(&user_efftab[nuser_effects],
argc - optind, &argv[optind]);
if (argc_effect == ST_EOF)
{
int i1;
fprintf(stderr, "%s: Known effects: ",myname);
for (i1 = 1; st_effects[i1].name; i1++)
fprintf(stderr, "%s ", st_effects[i1].name);
fprintf(stderr, "\n");
st_fail("Effect '%s' is not known!", argv[optind]);
}
/* Skip past effect name */
optind++;
(*user_efftab[nuser_effects].h->getopts)(&user_efftab[nuser_effects],
argc_effect,
&argv[optind]);
/* Skip past the effect arguments */
optind += argc_effect;
nuser_effects++;
}
/* Check global arguments */
if (dovolume && volume == 0.0)
st_fail("Volume must be non-zero");
/* negative volume is phase-reversal */
if (volume < 0.0)
st_report("Volume adjustment is negative. This will result in a phase change\n");
/* If file types have not been set with -t, set from file names. */
if (! informat.filetype) {
if ((informat.filetype = strrchr(ifile, LASTCHAR)) != NULL)
informat.filetype++;
else
informat.filetype = ifile;
if ((informat.filetype = strrchr(informat.filetype, '.')) != NULL)
informat.filetype++;
else /* Default to "auto" */
informat.filetype = "auto";
}
if (writing && ! outformat.filetype) {
if ((outformat.filetype = strrchr(ofile, LASTCHAR)) != NULL)
outformat.filetype++;
else
outformat.filetype = ofile;
if ((outformat.filetype = strrchr(outformat.filetype, '.')) != NULL)
outformat.filetype++;
}
/* Default the input comment to the filename.
* The output comment will be assigned when the informat
* structure is copied to the outformat.
*/
informat.comment = informat.filename;
process();
statistics();
return(0);
}
#ifdef HAVE_GETOPT_H
static char *getoptstr = "+r:v:t:c:phsuUAaigbwlfdDxV";
#else
static char *getoptstr = "r:v:t:c:phsuUAaigbwlfdDxV";
#endif
static void doopts(argc, argv)
int argc;
char **argv;
{
int c;
char *str;
while ((c = getopt(argc, argv, getoptstr)) != -1) {
switch(c) {
case 'p':
soxpreview++;
break;
case 'h':
usage((char *)0);
/* no return from above */
case 't':
if (! ft) usage("-t");
ft->filetype = optarg;
if (ft->filetype[0] == '.')
ft->filetype++;
break;
case 'r':
if (! ft) usage("-r");
str = optarg;
#ifdef __alpha__
if ((! sscanf(str, "%u", &ft->info.rate)) ||
(ft->info.rate <= 0))
#else
if ((! sscanf(str, "%lu", &ft->info.rate)) ||
(ft->info.rate <= 0))
#endif
st_fail("-r must be given a positive integer");
break;
case 'v':
if (!ft || dovolume) usage("-v");
str = optarg;
if (! sscanf(str, "%lf", &volume))
st_fail("Volume value '%s' is not a number",
optarg);
dovolume = 1;
break;
case 'c':
if (! ft) usage("-c");
str = optarg;
if (! sscanf(str, "%d", &ft->info.channels))
st_fail("-c must be given a number");
break;
case 'b':
if (! ft) usage("-b");
ft->info.size = ST_SIZE_BYTE;
break;
case 'w':
if (! ft) usage("-w");
ft->info.size = ST_SIZE_WORD;
break;
case 'l':
if (! ft) usage("-l");
ft->info.size = ST_SIZE_DWORD;
break;
case 'f':
if (! ft) usage("-f");
ft->info.size = ST_SIZE_FLOAT;
break;
case 'd':
if (! ft) usage("-d");
ft->info.size = ST_SIZE_DOUBLE;
break;
case 'D':
if (! ft) usage("-D");
ft->info.size = ST_SIZE_IEEE;
break;
case 's':
if (! ft) usage("-s");
ft->info.encoding = ST_ENCODING_SIGN2;
break;
case 'u':
if (! ft) usage("-u");
ft->info.encoding = ST_ENCODING_UNSIGNED;
break;
case 'U':
if (! ft) usage("-U");
ft->info.encoding = ST_ENCODING_ULAW;
break;
case 'A':
if (! ft) usage("-A");
ft->info.encoding = ST_ENCODING_ALAW;
break;
case 'a':
if (! ft) usage("-a");
ft->info.encoding = ST_ENCODING_ADPCM;
break;
case 'i':
if (! ft) usage("-i");
ft->info.encoding = ST_ENCODING_IMA_ADPCM;
break;
case 'g':
if (! ft) usage("-g");
ft->info.encoding = ST_ENCODING_GSM;
break;
case 'x':
if (! ft) usage("-x");
ft->swap = 1;
break;
case 'V':
verbose = 1;
break;
}
}
}
static void init(void) {
/* init files */
informat.info.rate = outformat.info.rate = 0;
informat.info.size = outformat.info.size = -1;
informat.info.encoding = outformat.info.encoding = -1;
informat.info.channels = outformat.info.channels = -1;
informat.comment = outformat.comment = NULL;
informat.swap = 0;
informat.filetype = outformat.filetype = (char *) 0;
informat.fp = stdin;
outformat.fp = stdout;
informat.filename = "input";
outformat.filename = "output";
}
/*
* Process input file -> effect table -> output file
* one buffer at a time
*/
static void process(void) {
int e, f, havedata, flowstatus;
st_gettype(&informat);
if (writing)
st_gettype(&outformat);
/* Read and write starters can change their formats. */
if ((* informat.h->startread)(&informat) == ST_EOF)
{
st_fail(informat.st_errstr);
}
st_checkformat(&informat);
if (dovolume)
st_report("Volume factor: %f\n", volume);
st_report("Input file: using sample rate %lu\n\tsize %s, encoding %s, %d %s",
informat.info.rate, st_sizes_str[informat.info.size],
st_encodings_str[informat.info.encoding], informat.info.channels,
(informat.info.channels > 1) ? "channels" : "channel");
if (informat.comment)
st_report("Input file: comment \"%s\"\n", informat.comment);
if (writing) {
/*
* There are two choices here:
* 1) stomp the old file - normal shell "> file" behavior
* 2) fail if the old file already exists - csh mode
*/
if (! strcmp(ofile, "-"))
{
ft->fp = stdout;
/* stdout tends to be line-buffered. Override this */
/* to be Full Buffering. */
if (setvbuf (ft->fp,NULL,_IOFBF,sizeof(char)*BUFSIZ))
{
st_fail("Can't set write buffer");
}
}
else {
ft->fp = fopen(ofile, WRITEBINARY);
if (ft->fp == NULL)
st_fail("Can't open output file '%s': %s",
ofile, strerror(errno));
/* stdout tends to be line-buffered. Override this */
/* to be Full Buffering. */
if (setvbuf (ft->fp,NULL,_IOFBF,sizeof(char)*BUFSIZ))
{
st_fail("Can't set write buffer");
}
} /* end of else != stdout */
#if defined(DUMB_FILESYSTEM)
outformat.seekable = 0;
#else
outformat.seekable = (filetype(fileno(outformat.fp)) == S_IFREG);
#endif
st_copyformat(&informat, &outformat);
if ((* outformat.h->startwrite)(&outformat) == ST_EOF)
{
st_fail(outformat.st_errstr);
}
st_checkformat(&outformat);
st_cmpformats(&informat, &outformat);
st_report("Output file: using sample rate %lu\n\tsize %s, encoding %s, %d %s",
outformat.info.rate, st_sizes_str[outformat.info.size],
st_encodings_str[outformat.info.encoding], outformat.info.channels,
(outformat.info.channels > 1) ? "channels" : "channel");
if (outformat.comment)
st_report("Output file: comment \"%s\"\n", outformat.comment);
}
/* build efftab */
checkeffect();
/* Start all effects */
for(e = 1; e < neffects; e++) {
(* efftab[e].h->start)(&efftab[e]);
if (efftabR[e].name)
(* efftabR[e].h->start)(&efftabR[e]);
}
/* Reserve an output buffer for all effects */
for(e = 0; e < neffects; e++)
{
efftab[e].obuf = (LONG *) malloc(BUFSIZ * sizeof(LONG));
if (efftab[e].obuf == NULL)
{
st_fail("could not allocate memory");
}
if (efftabR[e].name)
{
efftabR[e].obuf = (LONG *) malloc(BUFSIZ * sizeof(LONG));
if (efftabR[e].obuf == NULL)
{
st_fail("could not allocate memory");
}
}
}
/*
* Just like errno, we must set st_errno to known values before
* calling I/O operations.
*/
informat.st_errno = 0;
outformat.st_errno = 0;
/* Prime while() loop by reading initial chunk of input data. */
efftab[0].olen = (*informat.h->read)(&informat,
efftab[0].obuf, (LONG) BUFSIZ);
efftab[0].odone = 0;
/* Change the volume of this initial input data if needed. */
if (dovolume)
clipped += volumechange(efftab[0].obuf, efftab[0].olen,
volume);
/* Run input data through effects and get more until olen == 0 */
while (efftab[0].olen > 0)
{
/* mark chain as empty */
for(e = 1; e < neffects; e++)
efftab[e].odone = efftab[e].olen = 0;
flowstatus = 0;
do {
ULONG w;
/* run entire chain BACKWARDS: pull, don't push.*/
/* this is because buffering system isn't a nice queueing system */
for(e = neffects - 1; e > 0; e--) {
flowstatus = flow_effect(e);
if (flowstatus)
break;
}
/* If outputing and output data was generated then write it */
if (writing&&(efftab[neffects-1].olen>efftab[neffects-1].odone))
{
w = (* outformat.h->write)(&outformat,
efftab[neffects-1].obuf,
(LONG) efftab[neffects-1].olen);
efftab[neffects-1].odone = efftab[neffects-1].olen;
}
if (outformat.st_errno)
st_fail(outformat.st_errstr);
/* If any effect will never again produce data, give up. This */
/* works because of the pull status: the effect won't be able to */
/* shut us down until all downstream buffers have been emptied. */
if (flowstatus < 0)
break;
/* if stuff still in pipeline, set up to flow effects again */
havedata = 0;
for(e = 0; e < neffects - 1; e++)
if (efftab[e].odone < efftab[e].olen) {
havedata = 1;
break;
}
} while (havedata);
/* Negative flowstatus says no more output will ever be generated. */
if (flowstatus < 0)
break;
/* Read another chunk of input data. */
efftab[0].olen = (*informat.h->read)(&informat,
efftab[0].obuf, (LONG) BUFSIZ);
efftab[0].odone = 0;
/* Change volume of these samples if needed. */
if (dovolume)
clipped += volumechange(efftab[0].obuf, efftab[0].olen,
volume);
}
if (informat.st_errno)
st_fail(informat.st_errstr);
/* Drain the effects out first to last,
* pushing residue through subsequent effects */
/* oh, what a tangled web we weave */
for(f = 1; f < neffects; f++)
{
while (1) {
if (drain_effect(f) == 0)
break; /* out of while (1) */
if (writing&&efftab[neffects-1].olen > 0)
(* outformat.h->write)(&outformat, efftab[neffects-1].obuf,
(LONG) efftab[neffects-1].olen);
if (efftab[f].olen != BUFSIZ)
break;
}
}
/* Very Important:
* Effect stop is called BEFORE files close.
* Effect may write out more data after.
*/
for (e = 1; e < neffects; e++) {
(* efftab[e].h->stop)(&efftab[e]);
if (efftabR[e].name)
(* efftabR[e].h->stop)(&efftabR[e]);
}
if ((* informat.h->stopread)(&informat) == ST_EOF)
st_fail(informat.st_errstr);
fclose(informat.fp);
if (writing)
{
if ((* outformat.h->stopwrite)(&outformat) == ST_EOF)
st_fail(outformat.st_errstr);
}
if (writing)
fclose(outformat.fp);
}
static int flow_effect(e)
int e;
{
LONG i, done, idone, odone, idonel, odonel, idoner, odoner;
LONG *ibuf, *obuf;
int effstatus;
/* I have no input data ? */
if (efftab[e-1].odone == efftab[e-1].olen)
return 0;
if (! efftabR[e].name) {
/* No stereo data, or effect can handle stereo data so
* run effect over entire buffer.
*/
idone = efftab[e-1].olen - efftab[e-1].odone;
odone = BUFSIZ;
effstatus = (* efftab[e].h->flow)(&efftab[e],
&efftab[e-1].obuf[efftab[e-1].odone],
efftab[e].obuf, &idone, &odone);
efftab[e-1].odone += idone;
efftab[e].odone = 0;
efftab[e].olen = odone;
done = idone + odone;
} else {
/* Put stereo data in two seperate buffers and run effect
* on each of them.
*/
idone = efftab[e-1].olen - efftab[e-1].odone;
odone = BUFSIZ;
ibuf = &efftab[e-1].obuf[efftab[e-1].odone];
for(i = 0; i < idone; i += 2) {
ibufl[i/2] = *ibuf++;
ibufr[i/2] = *ibuf++;
}
/* left */
idonel = (idone + 1)/2; /* odd-length logic */
odonel = odone/2;
effstatus = (* efftab[e].h->flow)(&efftab[e],
ibufl, obufl, &idonel, &odonel);
/* right */
idoner = idone/2; /* odd-length logic */
odoner = odone/2;
effstatus = (* efftabR[e].h->flow)(&efftabR[e],
ibufr, obufr, &idoner, &odoner);
obuf = efftab[e].obuf;
/* This loop implies left and right effect will always output
* the same amount of data.
*/
for(i = 0; i < odoner; i++) {
*obuf++ = obufl[i];
*obuf++ = obufr[i];
}
efftab[e-1].odone += idonel + idoner;
efftab[e].odone = 0;
efftab[e].olen = odonel + odoner;
done = idonel + idoner + odonel + odoner;
}
if (done == 0)
st_fail("Effect took & gave no samples!");
if (effstatus == ST_EOF)
return -1;
return 1;
}
static int drain_effect(e)
int e;
{
LONG i, olen, olenl, olenr;
LONG *obuf;
if (! efftabR[e].name) {
efftab[e].olen = BUFSIZ;
(* efftab[e].h->drain)(&efftab[e],efftab[e].obuf,
&efftab[e].olen);
}
else {
olen = BUFSIZ;
/* left */
olenl = olen/2;
(* efftab[e].h->drain)(&efftab[e], obufl, &olenl);
/* right */
olenr = olen/2;
(* efftab[e].h->drain)(&efftabR[e], obufr, &olenr);
obuf = efftab[e].obuf;
/* This loop implies left and right effect will always output
* the same amount of data.
*/
for(i = 0; i < olenr; i++) {
*obuf++ = obufl[i];
*obuf++ = obufr[i];
}
efftab[e].olen = olenl + olenr;
}
return(efftab[e].olen);
}
/*
* If no effect given, decide what it should be.
* Smart ruleset for multiple effects in sequence.
* Puts user-specified effect in right place.
*/
static void
checkeffect()
{
int i;
int needchan = 0, needrate = 0, haschan = 0, hasrate = 0;
int effects_mask = 0;
needrate = (informat.info.rate != outformat.info.rate);
needchan = (informat.info.channels != outformat.info.channels);
for (i = 0; i < nuser_effects; i++)
{
if (user_efftab[i].h->flags & ST_EFF_CHAN)
{
haschan++;
}
if (user_efftab[i].h->flags & ST_EFF_RATE)
{
hasrate++;
}
}
if (haschan > 1)
st_fail("Can not specify multiple effects that modify channel #");
if (hasrate > 1)
st_fail("Can not specify multiple effects that change sampel rate");
if (haschan && !needchan)
st_fail("Can not specify channel effects when input and output channel # are equal");
if (hasrate && !needrate)
st_fail("Can not specify sample rate effects when input and output rate are equal");
/* If not writing output then do not worry about adding
* channel and rate effects. This is just to speed things
* up.
*/
if (!writing)
{
needchan = 0;
needrate = 0;
}
/* --------- add the effects ------------------------ */
/* efftab[0] is always the input stream and always exists */
neffects = 1;
/* If reducing channels then its faster to run all effects
* after the avg effect.
*/
if (needchan && !(haschan) &&
(informat.info.channels > outformat.info.channels))
{
/* Find effect and update initial pointers */
st_geteffect(&efftab[neffects], "avg");
/* give default opts for added effects */
(* efftab[neffects].h->getopts)(&efftab[neffects],(int)0,
(char **)0);
/* Copy format info to effect table */
effects_mask = st_updateeffect(&efftab[neffects], &informat,
&outformat, effects_mask);
neffects++;
}
/* If reducing the number of samples, its faster to run all effects
* after the resample effect.
*/
if (needrate && !(hasrate) &&
(informat.info.rate > outformat.info.rate))
{
if (soxpreview)
st_geteffect(&efftab[neffects], "rate");
else
st_geteffect(&efftab[neffects], "resample");
/* set up & give default opts for added effects */
(* efftab[neffects].h->getopts)(&efftab[neffects],(int)0,
(char **)0);
/* Copy format info to effect table */
effects_mask = st_updateeffect(&efftab[neffects], &informat,
&outformat, effects_mask);
/* Rate can't handle multiple channels so be sure and
* account for that.
*/
if (efftab[neffects].ininfo.channels > 1)
{
memcpy(&efftabR[neffects], &efftab[neffects],
sizeof(struct st_effect));
}
neffects++;
}
/* Copy over user specified effects into real efftab */
for(i = 0; i < nuser_effects; i++)
{
memcpy(&efftab[neffects], &user_efftab[i],
sizeof(struct st_effect));
/* Copy format info to effect table */
effects_mask = st_updateeffect(&efftab[neffects], &informat,
&outformat, effects_mask);
/* If this effect can't handle multiple channels then
* account for this.
*/
if ((efftab[neffects].ininfo.channels > 1) &&
!(efftab[neffects].h->flags & ST_EFF_MCHAN))
{
memcpy(&efftabR[neffects], &efftab[neffects],
sizeof(struct st_effect));
}
neffects++;
}
/* If rate effect hasn't been added by now then add it here.
* Check adding rate before avg because its faster to run
* rate on less channels then more.
*/
if (needrate && !(effects_mask & ST_EFF_RATE))
{
if (soxpreview)
st_geteffect(&efftab[neffects], "rate");
else
st_geteffect(&efftab[neffects], "resample");
/* set up & give default opts for added effects */
(* efftab[neffects].h->getopts)(&efftab[neffects],(int)0,
(char **)0);
/* Copy format info to effect table */
effects_mask = st_updateeffect(&efftab[neffects], &informat,
&outformat, effects_mask);
/* Rate can't handle multiple channels so be sure and
* account for that.
*/
if (efftab[neffects].ininfo.channels > 1)
{
memcpy(&efftabR[neffects], &efftab[neffects],
sizeof(struct st_effect));
}
neffects++;
}
/* If code up until know still hasn't added avg effect then
* do it now.
*/
if (needchan && !(effects_mask & ST_EFF_CHAN))
{
st_geteffect(&efftab[neffects], "avg");
/* set up & give default opts for added effects */
(* efftab[neffects].h->getopts)(&efftab[neffects],(int)0,
(char **)0);
/* Copy format info to effect table */
effects_mask = st_updateeffect(&efftab[neffects], &informat,
&outformat, effects_mask);
neffects++;
}
}
static void statistics(void) {
if (dovolume && clipped > 0)
st_report("Volume change clipped %d samples", clipped);
}
static LONG volumechange(buf, ct, vol)
LONG *buf;
LONG ct;
double vol;
{
double y;
LONG *p,*top;
LONG clips=0;
p = buf;
top = buf+ct;
while (p < top) {
y = vol * *p;
if (y < -2147483647.0) {
y = -2147483647.0;
clips++;
}
else if (y > 2147483647.0) {
y = 2147483647.0;
clips++;
}
*p++ = y + 0.5;
}
return clips;
}
static int filetype(fd)
int fd;
{
struct stat st;
fstat(fd, &st);
return st.st_mode & S_IFMT;
}
static char *usagestr =
"[ gopts ] [ fopts ] ifile [ fopts ] ofile [ effect [ effopts ] ]";
static void usage(opt)
char *opt;
{
int i;
fprintf(stderr, "%s: ", myname);
if (verbose || !opt)
fprintf(stderr, "%s\n\n", st_version());
fprintf(stderr, "Usage: %s\n\n", usagestr);
if (opt)
fprintf(stderr, "Failed at: %s\n", opt);
else {
fprintf(stderr,"gopts: -e -h -p -v volume -V\n\n");
fprintf(stderr,"fopts: -r rate -c channels -s/-u/-U/-A/-a/-i/-g -b/-w/-l/-f/-d/-D -x\n\n");
fprintf(stderr, "effect: ");
for (i = 1; st_effects[i].name != NULL; i++) {
fprintf(stderr, "%s ", st_effects[i].name);
}
fprintf(stderr, "\n\neffopts: depends on effect\n\n");
fprintf(stderr, "Supported file formats: ");
for (i = 0; st_formats[i].names != NULL; i++) {
/* only print the first name */
fprintf(stderr, "%s ", st_formats[i].names[0]);
}
fputc('\n', stderr);
}
exit(1);
}
/* called from util.c:fail */
void cleanup(void) {
/* Close the input file and outputfile before exiting*/
if (informat.fp)
fclose(informat.fp);
if (outformat.fp) {
fclose(outformat.fp);
/* remove the output file because we failed, if it's ours. */
/* Don't if its not a regular file. */
if (filetype(fileno(outformat.fp)) == S_IFREG)
REMOVE(outformat.filename);
}
}