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cmdutils.c
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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 <limits.h>
/* Include only the enabled headers since some compilers (namely, Sun
Studio) will not omit unused inline functions and create undefined
references to libraries that are not being built. */
#include "config.h"
#include "libavformat/avformat.h"
#ifdef CONFIG_AVFILTER
#include "libavfilter/avfilter.h"
#endif
#include "libavdevice/avdevice.h"
#include "libswscale/swscale.h"
#ifdef CONFIG_POSTPROC
#include "libpostproc/postprocess.h"
#endif
#include "libavutil/avstring.h"
#include "libavcodec/opt.h"
#include "cmdutils.h"
#ifdef CONFIG_NETWORK
#include "libavformat/network.h"
#endif
#undef exit
const char **opt_names;
static int opt_name_count;
AVCodecContext *avctx_opts[CODEC_TYPE_NB];
AVFormatContext *avformat_opts;
struct SwsContext *sws_opts;
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);
}
int64_t parse_time_or_die(const char *context, const char *timestr, int is_duration)
{
int64_t us = parse_date(timestr, is_duration);
if (us == INT64_MIN) {
fprintf(stderr, "Invalid %s specification for %s: %s\n",
is_duration ? "duration" : "date", context, timestr);
exit(1);
}
return us;
}
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, -1.0/0.0, 1.0/0.0);
} else if (po->flags & OPT_FUNC2) {
if(po->u.func2_arg(opt+1, arg)<0)
goto unknown_opt;
} else {
po->u.func_arg(arg);
}
if(po->flags & OPT_EXIT)
exit(0);
} else {
if (parse_arg_function)
parse_arg_function(opt);
}
}
}
int opt_default(const char *opt, const char *arg){
int type;
const AVOption *o= NULL;
int opt_types[]={AV_OPT_FLAG_VIDEO_PARAM, AV_OPT_FLAG_AUDIO_PARAM, 0, AV_OPT_FLAG_SUBTITLE_PARAM, 0};
for(type=0; type<CODEC_TYPE_NB; type++){
const AVOption *o2 = av_find_opt(avctx_opts[0], opt, NULL, opt_types[type], opt_types[type]);
if(o2)
o = av_set_string2(avctx_opts[type], opt, arg, 1);
}
if(!o)
o = av_set_string2(avformat_opts, opt, arg, 1);
if(!o)
o = av_set_string2(sws_opts, opt, arg, 1);
if(!o){
if(opt[0] == 'a')
o = av_set_string2(avctx_opts[CODEC_TYPE_AUDIO], opt+1, arg, 1);
else if(opt[0] == 'v')
o = av_set_string2(avctx_opts[CODEC_TYPE_VIDEO], opt+1, arg, 1);
else if(opt[0] == 's')
o = av_set_string2(avctx_opts[CODEC_TYPE_SUBTITLE], opt+1, arg, 1);
}
if(!o)
return -1;
// av_log(NULL, AV_LOG_ERROR, "%s:%s: %f 0x%0X\n", opt, arg, av_get_double(avctx_opts, opt, NULL), (int)av_get_int(avctx_opts, opt, NULL));
//FIXME we should always use avctx_opts, ... for storing options so there will not be any need to keep track of what i set over this
opt_names= av_realloc(opt_names, sizeof(void*)*(opt_name_count+1));
opt_names[opt_name_count++]= o->name;
if(avctx_opts[0]->debug || avformat_opts->debug)
av_log_set_level(AV_LOG_DEBUG);
return 0;
}
void set_context_opts(void *ctx, void *opts_ctx, int flags)
{
int i;
for(i=0; i<opt_name_count; i++){
char buf[256];
const AVOption *opt;
const char *str= av_get_string(opts_ctx, opt_names[i], &opt, buf, sizeof(buf));
/* if an option with name opt_names[i] is present in opts_ctx then str is non-NULL */
if(str && ((opt->flags & flags) == flags))
av_set_string2(ctx, opt_names[i], str, 1);
}
}
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 occurred\n"
"Usually that means that input file is truncated and/or corrupted.\n",
filename);
break;
case AVERROR(ENOMEM):
fprintf(stderr, "%s: memory allocation error occurred\n", filename);
break;
case AVERROR(ENOENT):
fprintf(stderr, "%s: no such file or directory\n", filename);
break;
#ifdef CONFIG_NETWORK
case AVERROR(FF_NETERROR(EPROTONOSUPPORT)):
fprintf(stderr, "%s: Unsupported network protocol\n", filename);
break;
#endif
default:
fprintf(stderr, "%s: Error while opening file\n", filename);
break;
}
}
#define PRINT_LIB_VERSION(outstream,libname,LIBNAME,indent) \
version= libname##_version(); \
fprintf(outstream, "%slib%-10s %2d.%2d.%2d / %2d.%2d.%2d\n", indent? " " : "", #libname, \
LIB##LIBNAME##_VERSION_MAJOR, LIB##LIBNAME##_VERSION_MINOR, LIB##LIBNAME##_VERSION_MICRO, \
version >> 16, version >> 8 & 0xff, version & 0xff);
static void print_all_lib_versions(FILE* outstream, int indent)
{
unsigned int version;
PRINT_LIB_VERSION(outstream, avutil, AVUTIL, indent);
PRINT_LIB_VERSION(outstream, avcodec, AVCODEC, indent);
PRINT_LIB_VERSION(outstream, avformat, AVFORMAT, indent);
PRINT_LIB_VERSION(outstream, avdevice, AVDEVICE, indent);
#ifdef CONFIG_AVFILTER
PRINT_LIB_VERSION(outstream, avfilter, AVFILTER, indent);
#endif
#ifdef CONFIG_SWSCALE
PRINT_LIB_VERSION(outstream, swscale, SWSCALE, indent);
#endif
#ifdef CONFIG_POSTPROC
PRINT_LIB_VERSION(outstream, postproc, POSTPROC, indent);
#endif
}