ref: 226e1dba5c5f44b4004ffe9c438c9c24af369a01
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_i.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h> /* for malloc() */
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#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
/*
* 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 st_sample_t ibufl[ST_BUFSIZ/2]; /* Left/right interleave buffers */
static st_sample_t ibufr[ST_BUFSIZ/2];
static st_sample_t obufl[ST_BUFSIZ/2];
static st_sample_t obufr[ST_BUFSIZ/2];
/* local forward declarations */
static void doopts(ft_t, int, char **);
static void copy_input(ft_t);
static void open_input(ft_t);
static void copy_output(ft_t);
static void open_output(ft_t);
static void usage(char *) NORET;
static int filetype(int);
static void process(void);
static void statistics(void);
static st_sample_t volumechange(st_sample_t *buf, st_ssize_t ct, double vol);
static void checkeffect(void);
static int flow_effect_out(void);
static int flow_effect(int);
static int drain_effect(int);
#ifdef SOXMIX
#define MAX_INPUT_FILES 2
#define REQUIRED_INPUT_FILES 2
#else
#define MAX_INPUT_FILES 1
#define REQUIRED_INPUT_FILES 1
#endif
static ft_t informat[MAX_INPUT_FILES];
static int input_count = 0;
static ft_t outformat;
static int output_count = 0;
/* 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;
int main(argc, argv)
int argc;
char **argv;
{
int argc_effect;
ft_t ft;
int parsing_output = 0;
int i;
myname = argv[0];
/* Loop over arguments and filenames, stop when an effect name is found */
while (optind < argc && output_count < 1 &&
st_checkeffect(argv[optind]) != ST_SUCCESS)
{
/*
* Its possible to not specify the output filename by using
* "-e" option. This allows effects to be ran on data but
* no output file to be written.
*/
if (strcmp(argv[optind], "-e"))
{
/* No -e option appears to be set. Attempt to see if
* this is the last filename or not. If we see no more
* options or an effect name then we assume this is
* the last filename.
*/
if (input_count >= REQUIRED_INPUT_FILES &&
(optind == (argc-1) ||
st_checkeffect(argv[optind+1]) == ST_SUCCESS ||
input_count >= MAX_INPUT_FILES))
{
parsing_output = 1;
}
if (parsing_output)
writing = 1;
}
else
{
/* -e option found. Make sure this was done on the
* output side. Should be no more parameters or
* a valid effects name.
*/
if (input_count >= REQUIRED_INPUT_FILES &&
(optind == (argc-1) ||
st_checkeffect(argv[optind+1]) == ST_SUCCESS ||
input_count >= MAX_INPUT_FILES))
{
parsing_output = 1;
}
if (parsing_output)
{
writing = 0;
optind++; /* Move passed -e */
}
else
{
usage("Can only specify \"-e\" for output filenames");
}
}
ft = (ft_t)malloc(sizeof(struct st_soundstream));
st_initformat(ft);
doopts(ft, argc, argv);
/* See if we have all the input filenames we need.
* If not, then parse this as input filenames.
*
* If we have enough but haven't reached the max #
* of inputs, then only treat this as an input filename
* if it looks like we have more filenames left.
*/
if (!parsing_output)
{
if (optind < argc)
{
ft->filename = argv[optind];
optind++;
copy_input(ft);
open_input(ft);
}
}
else
{
if (optind < argc && writing)
{
ft->filename = argv[optind];
optind++;
}
else
{
ft->filename = 0;
}
copy_output(ft);
/* 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.
*/
}
}
/* Make sure we got at least the required # of input filename */
if (input_count < REQUIRED_INPUT_FILES ||
!informat[REQUIRED_INPUT_FILES-1] ||
!informat[REQUIRED_INPUT_FILES-1]->filename)
usage("Not enough input files specified");
if (!outformat || (!outformat->filename && writing))
usage("No output file?");
/* Loop through the reset of the arguments looking for effects */
nuser_effects = 0;
while (optind < argc)
{
if (nuser_effects >= MAX_USER_EFF)
{
st_fail("To 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 = 0; st_effects[i1].name; i1++)
fprintf(stderr, "%s ", st_effects[i1].name);
fprintf(stderr, "\n\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++;
}
if (dovolume)
st_report("Volume factor: %f\n", volume);
if (dovolume && volume < 0.0)
st_report("Volume adjustment is negative. This will result in a phase change\n");
process();
statistics();
for (i = 0; i < input_count; i++)
{
if (informat[i])
free(informat[i]);
}
if (outformat)
free(outformat);
return(0);
}
static void copy_input(ft_t ft)
{
informat[input_count] = ft;
/* Let auto effect do the work if user is not overriding. */
if (!ft->filetype)
ft->filetype = "auto";
if ( st_gettype(ft) )
st_fail("Unknown input file format for '%s': %s",
ft->filename, ft->st_errstr);
/* Default the input comment to the filename if not set from
* command line.
* FIXME: Should be a memory copy, not a pointer asignment.
*/
if (!ft->comment)
ft->comment = ft->filename;
input_count++;
}
static void open_input(ft_t ft)
{
/* Open file handler based on input name. Used stdin file handler
* if the filename is "="
*/
if (! strcmp(ft->filename, "-"))
ft->fp = stdin;
else if ((ft->fp = fopen(ft->filename, "rb")) == NULL)
st_fail("Can't open input file '%s': %s", ft->filename,
strerror(errno));
/* See if this file is seekable or not */
#if defined(DUMB_FILESYSTEM)
ft->seekable = 0;
#else
ft->seekable = (filetype(fileno(ft->fp)) == S_IFREG);
#endif
}
#if defined(DOS) || defined(WIN32)
#define LASTCHAR '\\'
#else
#define LASTCHAR '/'
#endif
static void copy_output(ft_t ft)
{
outformat = ft;
if (writing && !ft->filetype && ft->filename) {
/* Use filename extension to determine audio type. */
/* First, chop off any path portions of filename. This
* prevents the next search from considering that part. */
if ((ft->filetype = strrchr(ft->filename, LASTCHAR)) == NULL)
ft->filetype = ft->filename;
/* Now look for an filename extension */
if ((ft->filetype = strrchr(ft->filetype, '.')) != NULL)
ft->filetype++;
else
ft->filetype = NULL;
}
if (writing && ft->filename)
{
if ( st_gettype(ft) )
st_fail("Unknown output file format for '%s': %s",
ft->filename, ft->st_errstr);
}
output_count++;
}
static void open_output(ft_t ft)
{
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(ft->filename, "-"))
{
ft->fp = stdout;
/* stdout tends to be line-buffered. Override this */
/* to be Full Buffering. */
if (setvbuf (ft->fp,NULL,_IOFBF,sizeof(char)*ST_BUFSIZ))
{
st_fail("Can't set write buffer");
}
}
else {
ft->fp = fopen(ft->filename, "wb");
if (ft->fp == NULL)
st_fail("Can't open output file '%s': %s",
ft->filename, strerror(errno));
/* stdout tends to be line-buffered. Override this */
/* to be Full Buffering. */
if (setvbuf (ft->fp,NULL,_IOFBF,sizeof(char)*ST_BUFSIZ))
{
st_fail("Can't set write buffer");
}
} /* end of else != stdout */
#if defined(DUMB_FILESYSTEM)
ft->seekable = 0;
#else
ft->seekable = (filetype(fileno(ft->fp)) == S_IFREG);
#endif
}
}
#ifdef HAVE_GETOPT_H
static char *getoptstr = "+r:v:t:c:phsuUAaigbwlfdxV";
#else
static char *getoptstr = "r:v:t:c:phsuUAaigbwlfdxV";
#endif
static void doopts(ft_t ft, int argc, char **argv)
{
int c, i;
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;
if ((! sscanf(str, "%u", &ft->info.rate)) ||
(ft->info.rate <= 0))
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", &i))
st_fail("-c must be given a number");
ft->info.channels = i;
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 '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 'f':
if (! ft) usage("-f");
ft->info.encoding = ST_ENCODING_FLOAT;
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;
}
}
}
#ifdef SOXMIX
static int compare_input(ft_t ft1, ft_t ft2)
{
if (ft1->info.rate != ft2->info.rate)
return ST_EOF;
if (ft1->info.size != ft2->info.size)
return ST_EOF;
if (ft1->info.encoding != ft2->info.encoding)
return ST_EOF;
if (ft1->info.channels != ft2->info.channels)
return ST_EOF;
return ST_SUCCESS;
}
#endif
/*
* Process input file -> effect table -> output file
* one buffer at a time
*/
static void process(void) {
int e, f, flowstatus;
#ifdef SOXMIX
int s;
st_ssize_t ilen[MAX_INPUT_FILES];
st_sample_t *ibuf[MAX_INPUT_FILES];
#endif
for (f = 0; f < input_count; f++)
{
/* Read and write starters can change their formats. */
if ((* informat[f]->h->startread)(informat[f]) != ST_SUCCESS)
{
st_fail("Failed reading %s: %s",informat[f]->filename,
informat[f]->st_errstr);
}
/* Go a head and assume 1 channel audio if nothing is detected.
* This is because libst usually doesn't set this for mono file
* formats (for historical reasons).
*/
if (informat[f]->info.channels == -1)
informat[f]->info.channels = 1;
if ( st_checkformat(informat[f]) )
st_fail("bad input format for file %s: %s",informat[f]->filename,informat[f]->st_errstr);
st_report("Input file %s: using sample rate %lu\n\tsize %s, encoding %s, %d %s",
informat[f]->filename, informat[f]->info.rate,
st_sizes_str[(unsigned char)informat[f]->info.size],
st_encodings_str[(unsigned char)informat[f]->info.encoding],
informat[f]->info.channels,
(informat[f]->info.channels > 1) ? "channels" : "channel");
if (informat[f]->comment)
st_report("Input file %s: comment \"%s\"\n",
informat[f]->filename, informat[f]->comment);
}
#ifdef SOXMIX
for (f = 1; f < input_count; f++)
{
if (compare_input(informat[0], informat[f]) != ST_SUCCESS)
{
st_fail("Input files must have the same rate, channels, data size, and encoding");
}
}
#endif
if (writing)
{
open_output(outformat);
/* Always use first input file as a reference for output
* file format.
*/
st_copyformat(informat[0], outformat);
if ((*outformat->h->startwrite)(outformat) == ST_EOF)
{
st_fail(outformat->st_errstr);
}
if (st_checkformat(outformat))
st_fail("bad output format: %s",outformat->st_errstr);
st_report("Output file %s: using sample rate %lu\n\tsize %s, encoding %s, %d %s",
outformat->filename, outformat->info.rate,
st_sizes_str[(unsigned char)outformat->info.size],
st_encodings_str[(unsigned char)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 = (st_sample_t *) malloc(ST_BUFSIZ *
sizeof(st_sample_t));
if (efftab[e].obuf == NULL)
{
st_fail("could not allocate memory");
}
if (efftabR[e].name)
{
efftabR[e].obuf = (st_sample_t *) malloc(ST_BUFSIZ *
sizeof(st_sample_t));
if (efftabR[e].obuf == NULL)
{
st_fail("could not allocate memory");
}
}
}
#ifdef SOXMIX
for (f = 0; f < MAX_INPUT_FILES; f++)
{
ibuf[f] = (st_sample_t *)malloc(ST_BUFSIZ * sizeof(st_sample_t));
if (!ibuf[f])
{
st_fail("could not allocate memory");
}
}
#endif
/*
* Just like errno, we must set st_errno to known values before
* calling I/O operations.
*/
for (f = 0; f < input_count; f++)
informat[f]->st_errno = 0;
outformat->st_errno = 0;
/* Run input data through effects and get more until olen == 0 */
do {
#ifndef SOXMIX
efftab[0].olen = (*informat[0]->h->read)(informat[0],
efftab[0].obuf,
(st_ssize_t)ST_BUFSIZ);
#else
for (f = 0; f < input_count; f++)
{
ilen[f] = (*informat[f]->h->read)(informat[f],
ibuf[f],
(st_ssize_t)ST_BUFSIZ);
}
efftab[0].olen = 0;
for (f = 0; f < input_count; f++)
if (ilen[f] > efftab[0].olen)
efftab[0].olen = ilen[f];
for (s = 0; s < efftab[0].olen; s++)
{
/* Mix data together by dividing by the number
* of audio files and then summing up. This prevents
* overflows.
*/
for (f = 0; f < input_count; f++)
{
if (f == 0)
efftab[0].obuf[s] =
(s<ilen[f]) ? (ibuf[f][s]/input_count) : 0;
else
if (s < ilen[f])
efftab[0].obuf[s] += ibuf[f][s]/input_count;
}
}
#endif
efftab[0].odone = 0;
/* If not writing and no effects are occuring then not much
* reason to continue reading. This allows this case. Mainly
* useful to print out info about input file header and quite.
*/
if (!writing && neffects == 1)
efftab[0].olen = 0;
if (efftab[0].olen == 0)
break;
/* Change the volume of this initial input data if needed. */
if (dovolume)
clipped += volumechange(efftab[0].obuf, efftab[0].olen,
volume);
/* mark chain as empty */
for(e = 1; e < neffects; e++)
efftab[e].odone = efftab[e].olen = 0;
flowstatus = flow_effect_out();
/* Negative flowstatus says no more output will ever be generated. */
if (flowstatus < 0 || outformat->st_errno)
break;
} while (1); /* break; efftab[0].olen == 0 */
#ifdef SOXMIX
/* Free input buffers now that they are not used */
for (f = 0; f < MAX_INPUT_FILES; f++)
{
free(ibuf[f]);
}
#endif
/* 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,
(st_ssize_t) efftab[neffects-1].olen);
if (efftab[f].olen != ST_BUFSIZ)
break;
}
}
/* Free output buffers now that they won't be used */
for(e = 0; e < neffects; e++)
{
free(efftab[e].obuf);
if (efftabR[e].obuf)
free(efftabR[e].obuf);
}
/* 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]);
}
for (f = 0; f < input_count; f++)
{
/* If problems closing input file, just warn user since
* we are exiting anyways.
*/
if ((* informat[f]->h->stopread)(informat[f]) == ST_EOF)
st_warn(informat[f]->st_errstr);
fclose(informat[f]->fp);
}
if (writing)
{
/* problem closing output file, just warn user since we
* are exiting anyways.
*/
if ((* outformat->h->stopwrite)(outformat) == ST_EOF)
st_warn(outformat->st_errstr);
}
if (writing)
fclose(outformat->fp);
}
static int flow_effect_out(void)
{
int e, havedata, flowstatus = 0;
do {
/* 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))
{
(* outformat->h->write)(outformat,
efftab[neffects-1].obuf,
(st_ssize_t)efftab[neffects-1].olen);
efftab[neffects-1].odone = efftab[neffects-1].olen;
}
if (outformat->st_errno)
{
st_warn("Error writing: %s",outformat->st_errstr);
break;
}
/* 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);
return flowstatus;
}
static int flow_effect(e)
int e;
{
st_ssize_t i, done, idone, odone, idonel, odonel, idoner, odoner;
st_sample_t *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 = ST_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 = ST_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;
{
st_ssize_t i, olen, olenl, olenr;
st_sample_t *obuf;
if (! efftabR[e].name) {
efftab[e].olen = ST_BUFSIZ;
(* efftab[e].h->drain)(&efftab[e],efftab[e].obuf,
&efftab[e].olen);
}
else {
olen = ST_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[0]->info.rate != outformat->info.rate);
needchan = (informat[0]->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_report("Can not specify multiple effects that change sample rate");
/* 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[0]->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[0],
outformat, effects_mask);
neffects++;
}
/* If reducing the number of samples, its faster to run all effects
* after the resample effect.
*/
if (needrate && !(hasrate) &&
(informat[0]->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[0],
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[0],
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[0],
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 now 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[0],
outformat, effects_mask);
neffects++;
}
}
static void statistics(void) {
if (dovolume && clipped > 0)
st_report("Volume change clipped %d samples", clipped);
}
static st_sample_t volumechange(st_sample_t *buf, st_ssize_t ct,
double vol)
{
double y;
st_sample_t *p,*top;
st_ssize_t 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;
}
#ifdef SOXMIX
static char *usagestr =
"[ gopts ] [ fopts ] ifile1 [fopts] ifile2 [ fopts ] ofile [ effect [ effopts ] ]";
#else
static char *usagestr =
"[ gopts ] [ fopts ] ifile [ fopts ] ofile [ effect [ effopts ] ]";
#endif
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: %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/-f -b/-w/-l -x\n\n");
fprintf(stderr, "effect: ");
for (i = 0; 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::st_fail() */
void cleanup(void) {
int i;
/* Close the input file and outputfile before exiting*/
for (i = 0; i < input_count; i++)
{
if (informat[i] && informat[i]->fp)
fclose(informat[i]->fp);
if (informat[i])
free(informat[i]);
}
if (outformat && 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)
unlink(outformat->filename);
}
if (outformat)
free(outformat);
}