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FFmpeg/cmdutils.c

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/*
* Various utilities for command line tools
* Copyright (c) 2000-2003 Fabrice Bellard
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <math.h>
#include "avformat.h"
#include "avfilter.h"
#include "avdevice.h"
#include "cmdutils.h"
#include "avstring.h"
#include "version.h"
#include "config.h"
#undef exit
double parse_number_or_die(const char *context, const char *numstr, int type, double min, double max)
{
char *tail;
const char *error;
double d = strtod(numstr, &tail);
if (*tail)
error= "Expected number for %s but found: %s\n";
else if (d < min || d > max)
error= "The value for %s was %s which is not within %f - %f\n";
else if(type == OPT_INT64 && (int64_t)d != d)
error= "Expected int64 for %s but found %s\n";
else
return d;
fprintf(stderr, error, context, numstr, min, max);
exit(1);
}
void show_help_options(const OptionDef *options, const char *msg, int mask, int value)
{
const OptionDef *po;
int first;
first = 1;
for(po = options; po->name != NULL; po++) {
char buf[64];
if ((po->flags & mask) == value) {
if (first) {
printf("%s", msg);
first = 0;
}
av_strlcpy(buf, po->name, sizeof(buf));
if (po->flags & HAS_ARG) {
av_strlcat(buf, " ", sizeof(buf));
av_strlcat(buf, po->argname, sizeof(buf));
}
printf("-%-17s %s\n", buf, po->help);
}
}
}
static const OptionDef* find_option(const OptionDef *po, const char *name){
while (po->name != NULL) {
if (!strcmp(name, po->name))
break;
po++;
}
return po;
}
void parse_options(int argc, char **argv, const OptionDef *options,
void (* parse_arg_function)(const char*))
{
const char *opt, *arg;
int optindex, handleoptions=1;
const OptionDef *po;
/* parse options */
optindex = 1;
while (optindex < argc) {
opt = argv[optindex++];
if (handleoptions && opt[0] == '-' && opt[1] != '\0') {
if (opt[1] == '-' && opt[2] == '\0') {
handleoptions = 0;
continue;
}
po= find_option(options, opt + 1);
if (!po->name)
po= find_option(options, "default");
if (!po->name) {
unknown_opt:
fprintf(stderr, "%s: unrecognized option '%s'\n", argv[0], opt);
exit(1);
}
arg = NULL;
if (po->flags & HAS_ARG) {
arg = argv[optindex++];
if (!arg) {
fprintf(stderr, "%s: missing argument for option '%s'\n", argv[0], opt);
exit(1);
}
}
if (po->flags & OPT_STRING) {
char *str;
str = av_strdup(arg);
*po->u.str_arg = str;
} else if (po->flags & OPT_BOOL) {
*po->u.int_arg = 1;
} else if (po->flags & OPT_INT) {
*po->u.int_arg = parse_number_or_die(opt+1, arg, OPT_INT64, INT_MIN, INT_MAX);
} else if (po->flags & OPT_INT64) {
*po->u.int64_arg = parse_number_or_die(opt+1, arg, OPT_INT64, INT64_MIN, INT64_MAX);
} else if (po->flags & OPT_FLOAT) {
*po->u.float_arg = parse_number_or_die(opt+1, arg, OPT_FLOAT, -INFINITY, INFINITY);
} else if (po->flags & OPT_FUNC2) {
if(po->u.func2_arg(opt+1, arg)<0)
goto unknown_opt;
} else {
po->u.func_arg(arg);
}
} else {
if (parse_arg_function)
parse_arg_function(opt);
}
}
}
void print_error(const char *filename, int err)
{
switch(err) {
case AVERROR_NUMEXPECTED:
fprintf(stderr, "%s: Incorrect image filename syntax.\n"
"Use '%%d' to specify the image number:\n"
" for img1.jpg, img2.jpg, ..., use 'img%%d.jpg';\n"
" for img001.jpg, img002.jpg, ..., use 'img%%03d.jpg'.\n",
filename);
break;
case AVERROR_INVALIDDATA:
fprintf(stderr, "%s: Error while parsing header\n", filename);
break;
case AVERROR_NOFMT:
fprintf(stderr, "%s: Unknown format\n", filename);
break;
case AVERROR(EIO):
fprintf(stderr, "%s: I/O error occured\n"
"Usually that means that input file is truncated and/or corrupted.\n",
filename);
break;
case AVERROR(ENOMEM):
fprintf(stderr, "%s: memory allocation error occured\n", filename);
break;
case AVERROR(ENOENT):
fprintf(stderr, "%s: no such file or directory\n", filename);
break;
default:
fprintf(stderr, "%s: Error while opening file\n", filename);
break;
}
}
void show_banner(const char *program_name, int program_birth_year)
{
fprintf(stderr, "%s version " FFMPEG_VERSION ", Copyright (c) %d-2008 Fabrice Bellard, et al.\n",
program_name, program_birth_year);
fprintf(stderr, " configuration: " FFMPEG_CONFIGURATION "\n");
fprintf(stderr, " libavutil version: " AV_STRINGIFY(LIBAVUTIL_VERSION) "\n");
fprintf(stderr, " libavcodec version: " AV_STRINGIFY(LIBAVCODEC_VERSION) "\n");
fprintf(stderr, " libavformat version: " AV_STRINGIFY(LIBAVFORMAT_VERSION) "\n");
fprintf(stderr, " libavdevice version: " AV_STRINGIFY(LIBAVDEVICE_VERSION) "\n");
#if ENABLE_AVFILTER
fprintf(stderr, " libavfilter version: " AV_STRINGIFY(LIBAVFILTER_VERSION) "\n");
#endif
fprintf(stderr, " built on " __DATE__ " " __TIME__);
#ifdef __GNUC__
fprintf(stderr, ", gcc: " __VERSION__ "\n");
#else
fprintf(stderr, ", using a non-gcc compiler\n");
#endif
}
void show_version(const char *program_name) {
/* TODO: add function interface to avutil and avformat avdevice*/
printf("%s " FFMPEG_VERSION "\n", program_name);
printf("libavutil %d\n"
"libavcodec %d\n"
"libavformat %d\n"
"libavdevice %d\n",
LIBAVUTIL_BUILD, avcodec_build(), LIBAVFORMAT_BUILD, LIBAVDEVICE_BUILD);
}
void show_license(void)
{
#ifdef CONFIG_NONFREE
printf(
"This version of FFmpeg has nonfree parts compiled in.\n"
"Therefore it is not legally redistributable.\n"
);
#elif CONFIG_GPL
printf(
"FFmpeg is free software; you can redistribute it and/or modify\n"
"it under the terms of the GNU General Public License as published by\n"
"the Free Software Foundation; either version 2 of the License, or\n"
"(at your option) any later version.\n"
"\n"
"FFmpeg is distributed in the hope that it will be useful,\n"
"but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
"MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
"GNU General Public License for more details.\n"
"\n"
"You should have received a copy of the GNU General Public License\n"
"along with FFmpeg; if not, write to the Free Software\n"
"Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n"
);
#else
printf(
"FFmpeg is free software; you can redistribute it and/or\n"
"modify it under the terms of the GNU Lesser General Public\n"
"License as published by the Free Software Foundation; either\n"
"version 2.1 of the License, or (at your option) any later version.\n"
"\n"
"FFmpeg is distributed in the hope that it will be useful,\n"
"but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
"MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU\n"
"Lesser General Public License for more details.\n"
"\n"
"You should have received a copy of the GNU Lesser General Public\n"
"License along with FFmpeg; if not, write to the Free Software\n"
"Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n"
);
#endif
}