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FFmpeg/fftools/cmdutils.c
Anton Khirnov d1bdd89c2f fftools/ffmpeg: use new stream specifier API in opt_match_per_stream*() 
Removes a lot of error checking code, as matching cannot fail.
2024-08-13 10:28:54 +02:00

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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 <stdint.h>
#include <stdlib.h>
#include <errno.h>
#include <math.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 "compat/va_copy.h"
#include "libavformat/avformat.h"
#include "libswscale/swscale.h"
#include "libswresample/swresample.h"
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/bprint.h"
#include "libavutil/display.h"
#include "libavutil/getenv_utf8.h"
#include "libavutil/libm.h"
#include "libavutil/mem.h"
#include "libavutil/parseutils.h"
#include "libavutil/eval.h"
#include "libavutil/dict.h"
#include "libavutil/opt.h"
#include "cmdutils.h"
#include "fopen_utf8.h"
#include "opt_common.h"
#ifdef _WIN32
#include <windows.h>
#include "compat/w32dlfcn.h"
#endif
AVDictionary *sws_dict;
AVDictionary *swr_opts;
AVDictionary *format_opts, *codec_opts;
int hide_banner = 0;
void uninit_opts(void)
{
av_dict_free(&swr_opts);
av_dict_free(&sws_dict);
av_dict_free(&format_opts);
av_dict_free(&codec_opts);
}
void log_callback_help(void *ptr, int level, const char *fmt, va_list vl)
{
vfprintf(stdout, fmt, vl);
}
void init_dynload(void)
{
#if HAVE_SETDLLDIRECTORY && defined(_WIN32)
/* Calling SetDllDirectory with the empty string (but not NULL) removes the
* current working directory from the DLL search path as a security pre-caution. */
SetDllDirectory("");
#endif
}
int parse_number(const char *context, const char *numstr, enum OptionType type,
double min, double max, double *dst)
{
char *tail;
const char *error;
double d = av_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_TYPE_INT64 && (int64_t)d != d)
error = "Expected int64 for %s but found %s\n";
else if (type == OPT_TYPE_INT && (int)d != d)
error = "Expected int for %s but found %s\n";
else {
*dst = d;
return 0;
}
av_log(NULL, AV_LOG_FATAL, error, context, numstr, min, max);
return AVERROR(EINVAL);
}
void show_help_options(const OptionDef *options, const char *msg, int req_flags,
int rej_flags)
{
const OptionDef *po;
int first;
first = 1;
for (po = options; po->name; po++) {
char buf[128];
if (((po->flags & req_flags) != req_flags) ||
(po->flags & rej_flags))
continue;
if (first) {
printf("%s\n", msg);
first = 0;
}
av_strlcpy(buf, po->name, sizeof(buf));
if (po->flags & OPT_FLAG_PERSTREAM)
av_strlcat(buf, "[:<stream_spec>]", sizeof(buf));
else if (po->flags & OPT_FLAG_SPEC)
av_strlcat(buf, "[:<spec>]", sizeof(buf));
if (po->argname)
av_strlcatf(buf, sizeof(buf), " <%s>", po->argname);
printf("-%-17s %s\n", buf, po->help);
}
printf("\n");
}
void show_help_children(const AVClass *class, int flags)
{
void *iter = NULL;
const AVClass *child;
if (class->option) {
av_opt_show2(&class, NULL, flags, 0);
printf("\n");
}
while (child = av_opt_child_class_iterate(class, &iter))
show_help_children(child, flags);
}
static const OptionDef *find_option(const OptionDef *po, const char *name)
{
if (*name == '/')
name++;
while (po->name) {
const char *end;
if (av_strstart(name, po->name, &end) && (!*end || *end == ':'))
break;
po++;
}
return po;
}
/* _WIN32 means using the windows libc - cygwin doesn't define that
* by default. HAVE_COMMANDLINETOARGVW is true on cygwin, while
* it doesn't provide the actual command line via GetCommandLineW(). */
#if HAVE_COMMANDLINETOARGVW && defined(_WIN32)
#include <shellapi.h>
/* Will be leaked on exit */
static char** win32_argv_utf8 = NULL;
static int win32_argc = 0;
/**
* Prepare command line arguments for executable.
* For Windows - perform wide-char to UTF-8 conversion.
* Input arguments should be main() function arguments.
* @param argc_ptr Arguments number (including executable)
* @param argv_ptr Arguments list.
*/
static void prepare_app_arguments(int *argc_ptr, char ***argv_ptr)
{
char *argstr_flat;
wchar_t **argv_w;
int i, buffsize = 0, offset = 0;
if (win32_argv_utf8) {
*argc_ptr = win32_argc;
*argv_ptr = win32_argv_utf8;
return;
}
win32_argc = 0;
argv_w = CommandLineToArgvW(GetCommandLineW(), &win32_argc);
if (win32_argc <= 0 || !argv_w)
return;
/* determine the UTF-8 buffer size (including NULL-termination symbols) */
for (i = 0; i < win32_argc; i++)
buffsize += WideCharToMultiByte(CP_UTF8, 0, argv_w[i], -1,
NULL, 0, NULL, NULL);
win32_argv_utf8 = av_mallocz(sizeof(char *) * (win32_argc + 1) + buffsize);
argstr_flat = (char *)win32_argv_utf8 + sizeof(char *) * (win32_argc + 1);
if (!win32_argv_utf8) {
LocalFree(argv_w);
return;
}
for (i = 0; i < win32_argc; i++) {
win32_argv_utf8[i] = &argstr_flat[offset];
offset += WideCharToMultiByte(CP_UTF8, 0, argv_w[i], -1,
&argstr_flat[offset],
buffsize - offset, NULL, NULL);
}
win32_argv_utf8[i] = NULL;
LocalFree(argv_w);
*argc_ptr = win32_argc;
*argv_ptr = win32_argv_utf8;
}
#else
static inline void prepare_app_arguments(int *argc_ptr, char ***argv_ptr)
{
/* nothing to do */
}
#endif /* HAVE_COMMANDLINETOARGVW */
static int opt_has_arg(const OptionDef *o)
{
if (o->type == OPT_TYPE_BOOL)
return 0;
if (o->type == OPT_TYPE_FUNC)
return !!(o->flags & OPT_FUNC_ARG);
return 1;
}
static int write_option(void *optctx, const OptionDef *po, const char *opt,
const char *arg, const OptionDef *defs)
{
/* new-style options contain an offset into optctx, old-style address of
* a global var*/
void *dst = po->flags & OPT_FLAG_OFFSET ?
(uint8_t *)optctx + po->u.off : po->u.dst_ptr;
char *arg_allocated = NULL;
enum OptionType so_type = po->type;
SpecifierOptList *sol = NULL;
double num;
int ret = 0;
if (*opt == '/') {
opt++;
if (po->type == OPT_TYPE_BOOL) {
av_log(NULL, AV_LOG_FATAL,
"Requested to load an argument from file for a bool option '%s'\n",
po->name);
return AVERROR(EINVAL);
}
arg_allocated = file_read(arg);
if (!arg_allocated) {
av_log(NULL, AV_LOG_FATAL,
"Error reading the value for option '%s' from file: %s\n",
opt, arg);
return AVERROR(EINVAL);
}
arg = arg_allocated;
}
if (po->flags & OPT_FLAG_SPEC) {
char *p = strchr(opt, ':');
char *str;
sol = dst;
ret = GROW_ARRAY(sol->opt, sol->nb_opt);
if (ret < 0)
goto finish;
str = av_strdup(p ? p + 1 : "");
if (!str) {
ret = AVERROR(ENOMEM);
goto finish;
}
sol->opt[sol->nb_opt - 1].specifier = str;
if (po->flags & OPT_FLAG_PERSTREAM) {
ret = stream_specifier_parse(&sol->opt[sol->nb_opt - 1].stream_spec,
str, 0, NULL);
if (ret < 0)
goto finish;
}
dst = &sol->opt[sol->nb_opt - 1].u;
}
if (po->type == OPT_TYPE_STRING) {
char *str;
if (arg_allocated) {
str = arg_allocated;
arg_allocated = NULL;
} else
str = av_strdup(arg);
av_freep(dst);
if (!str) {
ret = AVERROR(ENOMEM);
goto finish;
}
*(char **)dst = str;
} else if (po->type == OPT_TYPE_BOOL || po->type == OPT_TYPE_INT) {
ret = parse_number(opt, arg, OPT_TYPE_INT64, INT_MIN, INT_MAX, &num);
if (ret < 0)
goto finish;
*(int *)dst = num;
so_type = OPT_TYPE_INT;
} else if (po->type == OPT_TYPE_INT64) {
ret = parse_number(opt, arg, OPT_TYPE_INT64, INT64_MIN, (double)INT64_MAX, &num);
if (ret < 0)
goto finish;
*(int64_t *)dst = num;
} else if (po->type == OPT_TYPE_TIME) {
ret = av_parse_time(dst, arg, 1);
if (ret < 0) {
av_log(NULL, AV_LOG_ERROR, "Invalid duration for option %s: %s\n",
opt, arg);
goto finish;
}
so_type = OPT_TYPE_INT64;
} else if (po->type == OPT_TYPE_FLOAT) {
ret = parse_number(opt, arg, OPT_TYPE_FLOAT, -INFINITY, INFINITY, &num);
if (ret < 0)
goto finish;
*(float *)dst = num;
} else if (po->type == OPT_TYPE_DOUBLE) {
ret = parse_number(opt, arg, OPT_TYPE_DOUBLE, -INFINITY, INFINITY, &num);
if (ret < 0)
goto finish;
*(double *)dst = num;
} else {
av_assert0(po->type == OPT_TYPE_FUNC && po->u.func_arg);
ret = po->u.func_arg(optctx, opt, arg);
if (ret < 0) {
av_log(NULL, AV_LOG_ERROR,
"Failed to set value '%s' for option '%s': %s\n",
arg, opt, av_err2str(ret));
goto finish;
}
}
if (po->flags & OPT_EXIT) {
ret = AVERROR_EXIT;
goto finish;
}
if (sol) {
sol->type = so_type;
sol->opt_canon = (po->flags & OPT_HAS_CANON) ?
find_option(defs, po->u1.name_canon) : po;
}
finish:
av_freep(&arg_allocated);
return ret;
}
int parse_option(void *optctx, const char *opt, const char *arg,
const OptionDef *options)
{
static const OptionDef opt_avoptions = {
.name = "AVOption passthrough",
.type = OPT_TYPE_FUNC,
.flags = OPT_FUNC_ARG,
.u.func_arg = opt_default,
};
const OptionDef *po;
int ret;
po = find_option(options, opt);
if (!po->name && opt[0] == 'n' && opt[1] == 'o') {
/* handle 'no' bool option */
po = find_option(options, opt + 2);
if ((po->name && po->type == OPT_TYPE_BOOL))
arg = "0";
} else if (po->type == OPT_TYPE_BOOL)
arg = "1";
if (!po->name)
po = &opt_avoptions;
if (!po->name) {
av_log(NULL, AV_LOG_ERROR, "Unrecognized option '%s'\n", opt);
return AVERROR(EINVAL);
}
if (opt_has_arg(po) && !arg) {
av_log(NULL, AV_LOG_ERROR, "Missing argument for option '%s'\n", opt);
return AVERROR(EINVAL);
}
ret = write_option(optctx, po, opt, arg, options);
if (ret < 0)
return ret;
return opt_has_arg(po);
}
int parse_options(void *optctx, int argc, char **argv, const OptionDef *options,
int (*parse_arg_function)(void *, const char*))
{
const char *opt;
int optindex, handleoptions = 1, ret;
/* perform system-dependent conversions for arguments list */
prepare_app_arguments(&argc, &argv);
/* 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;
}
opt++;
if ((ret = parse_option(optctx, opt, argv[optindex], options)) < 0)
return ret;
optindex += ret;
} else {
if (parse_arg_function) {
ret = parse_arg_function(optctx, opt);
if (ret < 0)
return ret;
}
}
}
return 0;
}
int parse_optgroup(void *optctx, OptionGroup *g, const OptionDef *defs)
{
int i, ret;
av_log(NULL, AV_LOG_DEBUG, "Parsing a group of options: %s %s.\n",
g->group_def->name, g->arg);
for (i = 0; i < g->nb_opts; i++) {
Option *o = &g->opts[i];
if (g->group_def->flags &&
!(g->group_def->flags & o->opt->flags)) {
av_log(NULL, AV_LOG_ERROR, "Option %s (%s) cannot be applied to "
"%s %s -- you are trying to apply an input option to an "
"output file or vice versa. Move this option before the "
"file it belongs to.\n", o->key, o->opt->help,
g->group_def->name, g->arg);
return AVERROR(EINVAL);
}
av_log(NULL, AV_LOG_DEBUG, "Applying option %s (%s) with argument %s.\n",
o->key, o->opt->help, o->val);
ret = write_option(optctx, o->opt, o->key, o->val, defs);
if (ret < 0)
return ret;
}
av_log(NULL, AV_LOG_DEBUG, "Successfully parsed a group of options.\n");
return 0;
}
int locate_option(int argc, char **argv, const OptionDef *options,
const char *optname)
{
const OptionDef *po;
int i;
for (i = 1; i < argc; i++) {
const char *cur_opt = argv[i];
if (*cur_opt++ != '-')
continue;
po = find_option(options, cur_opt);
if (!po->name && cur_opt[0] == 'n' && cur_opt[1] == 'o')
po = find_option(options, cur_opt + 2);
if ((!po->name && !strcmp(cur_opt, optname)) ||
(po->name && !strcmp(optname, po->name)))
return i;
if (!po->name || opt_has_arg(po))
i++;
}
return 0;
}
static void dump_argument(FILE *report_file, const char *a)
{
const unsigned char *p;
for (p = a; *p; p++)
if (!((*p >= '+' && *p <= ':') || (*p >= '@' && *p <= 'Z') ||
*p == '_' || (*p >= 'a' && *p <= 'z')))
break;
if (!*p) {
fputs(a, report_file);
return;
}
fputc('"', report_file);
for (p = a; *p; p++) {
if (*p == '\\' || *p == '"' || *p == '$' || *p == '`')
fprintf(report_file, "\\%c", *p);
else if (*p < ' ' || *p > '~')
fprintf(report_file, "\\x%02x", *p);
else
fputc(*p, report_file);
}
fputc('"', report_file);
}
static void check_options(const OptionDef *po)
{
while (po->name) {
if (po->flags & OPT_PERFILE)
av_assert0(po->flags & (OPT_INPUT | OPT_OUTPUT | OPT_DECODER));
if (po->type == OPT_TYPE_FUNC)
av_assert0(!(po->flags & (OPT_FLAG_OFFSET | OPT_FLAG_SPEC)));
// OPT_FUNC_ARG can only be ser for OPT_TYPE_FUNC
av_assert0((po->type == OPT_TYPE_FUNC) || !(po->flags & OPT_FUNC_ARG));
po++;
}
}
void parse_loglevel(int argc, char **argv, const OptionDef *options)
{
int idx = locate_option(argc, argv, options, "loglevel");
char *env;
check_options(options);
if (!idx)
idx = locate_option(argc, argv, options, "v");
if (idx && argv[idx + 1])
opt_loglevel(NULL, "loglevel", argv[idx + 1]);
idx = locate_option(argc, argv, options, "report");
env = getenv_utf8("FFREPORT");
if (env || idx) {
FILE *report_file = NULL;
init_report(env, &report_file);
if (report_file) {
int i;
fprintf(report_file, "Command line:\n");
for (i = 0; i < argc; i++) {
dump_argument(report_file, argv[i]);
fputc(i < argc - 1 ? ' ' : '\n', report_file);
}
fflush(report_file);
}
}
freeenv_utf8(env);
idx = locate_option(argc, argv, options, "hide_banner");
if (idx)
hide_banner = 1;
}
static const AVOption *opt_find(void *obj, const char *name, const char *unit,
int opt_flags, int search_flags)
{
const AVOption *o = av_opt_find(obj, name, unit, opt_flags, search_flags);
if(o && !o->flags)
return NULL;
return o;
}
#define FLAGS ((o->type == AV_OPT_TYPE_FLAGS && (arg[0]=='-' || arg[0]=='+')) ? AV_DICT_APPEND : 0)
int opt_default(void *optctx, const char *opt, const char *arg)
{
const AVOption *o;
int consumed = 0;
char opt_stripped[128];
const char *p;
const AVClass *cc = avcodec_get_class(), *fc = avformat_get_class();
#if CONFIG_SWSCALE
const AVClass *sc = sws_get_class();
#endif
#if CONFIG_SWRESAMPLE
const AVClass *swr_class = swr_get_class();
#endif
if (!strcmp(opt, "debug") || !strcmp(opt, "fdebug"))
av_log_set_level(AV_LOG_DEBUG);
if (!(p = strchr(opt, ':')))
p = opt + strlen(opt);
av_strlcpy(opt_stripped, opt, FFMIN(sizeof(opt_stripped), p - opt + 1));
if ((o = opt_find(&cc, opt_stripped, NULL, 0,
AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)) ||
((opt[0] == 'v' || opt[0] == 'a' || opt[0] == 's') &&
(o = opt_find(&cc, opt + 1, NULL, 0, AV_OPT_SEARCH_FAKE_OBJ)))) {
av_dict_set(&codec_opts, opt, arg, FLAGS);
consumed = 1;
}
if ((o = opt_find(&fc, opt, NULL, 0,
AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ))) {
av_dict_set(&format_opts, opt, arg, FLAGS);
if (consumed)
av_log(NULL, AV_LOG_VERBOSE, "Routing option %s to both codec and muxer layer\n", opt);
consumed = 1;
}
#if CONFIG_SWSCALE
if (!consumed && (o = opt_find(&sc, opt, NULL, 0,
AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ))) {
if (!strcmp(opt, "srcw") || !strcmp(opt, "srch") ||
!strcmp(opt, "dstw") || !strcmp(opt, "dsth") ||
!strcmp(opt, "src_format") || !strcmp(opt, "dst_format")) {
av_log(NULL, AV_LOG_ERROR, "Directly using swscale dimensions/format options is not supported, please use the -s or -pix_fmt options\n");
return AVERROR(EINVAL);
}
av_dict_set(&sws_dict, opt, arg, FLAGS);
consumed = 1;
}
#else
if (!consumed && !strcmp(opt, "sws_flags")) {
av_log(NULL, AV_LOG_WARNING, "Ignoring %s %s, due to disabled swscale\n", opt, arg);
consumed = 1;
}
#endif
#if CONFIG_SWRESAMPLE
if (!consumed && (o=opt_find(&swr_class, opt, NULL, 0,
AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ))) {
av_dict_set(&swr_opts, opt, arg, FLAGS);
consumed = 1;
}
#endif
if (consumed)
return 0;
return AVERROR_OPTION_NOT_FOUND;
}
/*
* Check whether given option is a group separator.
*
* @return index of the group definition that matched or -1 if none
*/
static int match_group_separator(const OptionGroupDef *groups, int nb_groups,
const char *opt)
{
int i;
for (i = 0; i < nb_groups; i++) {
const OptionGroupDef *p = &groups[i];
if (p->sep && !strcmp(p->sep, opt))
return i;
}
return -1;
}
/*
* Finish parsing an option group.
*
* @param group_idx which group definition should this group belong to
* @param arg argument of the group delimiting option
*/
static int finish_group(OptionParseContext *octx, int group_idx,
const char *arg)
{
OptionGroupList *l = &octx->groups[group_idx];
OptionGroup *g;
int ret;
ret = GROW_ARRAY(l->groups, l->nb_groups);
if (ret < 0)
return ret;
g = &l->groups[l->nb_groups - 1];
*g = octx->cur_group;
g->arg = arg;
g->group_def = l->group_def;
g->sws_dict = sws_dict;
g->swr_opts = swr_opts;
g->codec_opts = codec_opts;
g->format_opts = format_opts;
codec_opts = NULL;
format_opts = NULL;
sws_dict = NULL;
swr_opts = NULL;
memset(&octx->cur_group, 0, sizeof(octx->cur_group));
return ret;
}
/*
* Add an option instance to currently parsed group.
*/
static int add_opt(OptionParseContext *octx, const OptionDef *opt,
const char *key, const char *val)
{
int global = !(opt->flags & OPT_PERFILE);
OptionGroup *g = global ? &octx->global_opts : &octx->cur_group;
int ret;
ret = GROW_ARRAY(g->opts, g->nb_opts);
if (ret < 0)
return ret;
g->opts[g->nb_opts - 1].opt = opt;
g->opts[g->nb_opts - 1].key = key;
g->opts[g->nb_opts - 1].val = val;
return 0;
}
static int init_parse_context(OptionParseContext *octx,
const OptionGroupDef *groups, int nb_groups)
{
static const OptionGroupDef global_group = { "global" };
int i;
memset(octx, 0, sizeof(*octx));
octx->groups = av_calloc(nb_groups, sizeof(*octx->groups));
if (!octx->groups)
return AVERROR(ENOMEM);
octx->nb_groups = nb_groups;
for (i = 0; i < octx->nb_groups; i++)
octx->groups[i].group_def = &groups[i];
octx->global_opts.group_def = &global_group;
octx->global_opts.arg = "";
return 0;
}
void uninit_parse_context(OptionParseContext *octx)
{
int i, j;
for (i = 0; i < octx->nb_groups; i++) {
OptionGroupList *l = &octx->groups[i];
for (j = 0; j < l->nb_groups; j++) {
av_freep(&l->groups[j].opts);
av_dict_free(&l->groups[j].codec_opts);
av_dict_free(&l->groups[j].format_opts);
av_dict_free(&l->groups[j].sws_dict);
av_dict_free(&l->groups[j].swr_opts);
}
av_freep(&l->groups);
}
av_freep(&octx->groups);
av_freep(&octx->cur_group.opts);
av_freep(&octx->global_opts.opts);
uninit_opts();
}
int split_commandline(OptionParseContext *octx, int argc, char *argv[],
const OptionDef *options,
const OptionGroupDef *groups, int nb_groups)
{
int ret;
int optindex = 1;
int dashdash = -2;
/* perform system-dependent conversions for arguments list */
prepare_app_arguments(&argc, &argv);
ret = init_parse_context(octx, groups, nb_groups);
if (ret < 0)
return ret;
av_log(NULL, AV_LOG_DEBUG, "Splitting the commandline.\n");
while (optindex < argc) {
const char *opt = argv[optindex++], *arg;
const OptionDef *po;
int ret, group_idx;
av_log(NULL, AV_LOG_DEBUG, "Reading option '%s' ...", opt);
if (opt[0] == '-' && opt[1] == '-' && !opt[2]) {
dashdash = optindex;
continue;
}
/* unnamed group separators, e.g. output filename */
if (opt[0] != '-' || !opt[1] || dashdash+1 == optindex) {
ret = finish_group(octx, 0, opt);
if (ret < 0)
return ret;
av_log(NULL, AV_LOG_DEBUG, " matched as %s.\n", groups[0].name);
continue;
}
opt++;
#define GET_ARG(arg) \
do { \
arg = argv[optindex++]; \
if (!arg) { \
av_log(NULL, AV_LOG_ERROR, "Missing argument for option '%s'.\n", opt);\
return AVERROR(EINVAL); \
} \
} while (0)
/* named group separators, e.g. -i */
group_idx = match_group_separator(groups, nb_groups, opt);
if (group_idx >= 0) {
GET_ARG(arg);
ret = finish_group(octx, group_idx, arg);
if (ret < 0)
return ret;
av_log(NULL, AV_LOG_DEBUG, " matched as %s with argument '%s'.\n",
groups[group_idx].name, arg);
continue;
}
/* normal options */
po = find_option(options, opt);
if (po->name) {
if (po->flags & OPT_EXIT) {
/* optional argument, e.g. -h */
arg = argv[optindex++];
} else if (opt_has_arg(po)) {
GET_ARG(arg);
} else {
arg = "1";
}
ret = add_opt(octx, po, opt, arg);
if (ret < 0)
return ret;
av_log(NULL, AV_LOG_DEBUG, " matched as option '%s' (%s) with "
"argument '%s'.\n", po->name, po->help, arg);
continue;
}
/* AVOptions */
if (argv[optindex]) {
ret = opt_default(NULL, opt, argv[optindex]);
if (ret >= 0) {
av_log(NULL, AV_LOG_DEBUG, " matched as AVOption '%s' with "
"argument '%s'.\n", opt, argv[optindex]);
optindex++;
continue;
} else if (ret != AVERROR_OPTION_NOT_FOUND) {
av_log(NULL, AV_LOG_ERROR, "Error parsing option '%s' "
"with argument '%s'.\n", opt, argv[optindex]);
return ret;
}
}
/* boolean -nofoo options */
if (opt[0] == 'n' && opt[1] == 'o' &&
(po = find_option(options, opt + 2)) &&
po->name && po->type == OPT_TYPE_BOOL) {
ret = add_opt(octx, po, opt, "0");
if (ret < 0)
return ret;
av_log(NULL, AV_LOG_DEBUG, " matched as option '%s' (%s) with "
"argument 0.\n", po->name, po->help);
continue;
}
av_log(NULL, AV_LOG_ERROR, "Unrecognized option '%s'.\n", opt);
return AVERROR_OPTION_NOT_FOUND;
}
if (octx->cur_group.nb_opts || codec_opts || format_opts)
av_log(NULL, AV_LOG_WARNING, "Trailing option(s) found in the "
"command: may be ignored.\n");
av_log(NULL, AV_LOG_DEBUG, "Finished splitting the commandline.\n");
return 0;
}
int read_yesno(void)
{
int c = getchar();
int yesno = (av_toupper(c) == 'Y');
while (c != '\n' && c != EOF)
c = getchar();
return yesno;
}
FILE *get_preset_file(char *filename, size_t filename_size,
const char *preset_name, int is_path,
const char *codec_name)
{
FILE *f = NULL;
int i;
#if HAVE_GETMODULEHANDLE && defined(_WIN32)
char *datadir = NULL;
#endif
char *env_home = getenv_utf8("HOME");
char *env_ffmpeg_datadir = getenv_utf8("FFMPEG_DATADIR");
const char *base[3] = { env_ffmpeg_datadir,
env_home, /* index=1(HOME) is special: search in a .ffmpeg subfolder */
FFMPEG_DATADIR, };
if (is_path) {
av_strlcpy(filename, preset_name, filename_size);
f = fopen_utf8(filename, "r");
} else {
#if HAVE_GETMODULEHANDLE && defined(_WIN32)
wchar_t *datadir_w = get_module_filename(NULL);
base[2] = NULL;
if (wchartoutf8(datadir_w, &datadir))
datadir = NULL;
av_free(datadir_w);
if (datadir)
{
char *ls;
for (ls = datadir; *ls; ls++)
if (*ls == '\\') *ls = '/';
if (ls = strrchr(datadir, '/'))
{
ptrdiff_t datadir_len = ls - datadir;
size_t desired_size = datadir_len + strlen("/ffpresets") + 1;
char *new_datadir = av_realloc_array(
datadir, desired_size, sizeof *datadir);
if (new_datadir) {
datadir = new_datadir;
datadir[datadir_len] = 0;
strncat(datadir, "/ffpresets", desired_size - 1 - datadir_len);
base[2] = datadir;
}
}
}
#endif
for (i = 0; i < 3 && !f; i++) {
if (!base[i])
continue;
snprintf(filename, filename_size, "%s%s/%s.ffpreset", base[i],
i != 1 ? "" : "/.ffmpeg", preset_name);
f = fopen_utf8(filename, "r");
if (!f && codec_name) {
snprintf(filename, filename_size,
"%s%s/%s-%s.ffpreset",
base[i], i != 1 ? "" : "/.ffmpeg", codec_name,
preset_name);
f = fopen_utf8(filename, "r");
}
}
}
#if HAVE_GETMODULEHANDLE && defined(_WIN32)
av_free(datadir);
#endif
freeenv_utf8(env_ffmpeg_datadir);
freeenv_utf8(env_home);
return f;
}
void stream_specifier_uninit(StreamSpecifier *ss)
{
av_freep(&ss->meta_key);
av_freep(&ss->meta_val);
av_freep(&ss->remainder);
memset(ss, 0, sizeof(*ss));
}
int stream_specifier_parse(StreamSpecifier *ss, const char *spec,
int allow_remainder, void *logctx)
{
char *endptr;
int ret;
memset(ss, 0, sizeof(*ss));
ss->idx = -1;
ss->media_type = AVMEDIA_TYPE_UNKNOWN;
ss->stream_list = STREAM_LIST_ALL;
av_log(logctx, AV_LOG_TRACE, "Parsing stream specifier: %s\n", spec);
while (*spec) {
if (*spec <= '9' && *spec >= '0') { /* opt:index */
ss->idx = strtol(spec, &endptr, 0);
av_assert0(endptr > spec);
spec = endptr;
av_log(logctx, AV_LOG_TRACE,
"Parsed index: %d; remainder: %s\n", ss->idx, spec);
// this terminates the specifier
break;
} else if (*spec == 'v' || *spec == 'a' || *spec == 's' || *spec == 'd' ||
*spec == 't' || *spec == 'V') { /* opt:[vasdtV] */
if (ss->media_type != AVMEDIA_TYPE_UNKNOWN) {
av_log(logctx, AV_LOG_ERROR, "Stream type specified multiple times\n");
ret = AVERROR(EINVAL);
goto fail;
}
switch (*spec++) {
case 'v': ss->media_type = AVMEDIA_TYPE_VIDEO; break;
case 'a': ss->media_type = AVMEDIA_TYPE_AUDIO; break;
case 's': ss->media_type = AVMEDIA_TYPE_SUBTITLE; break;
case 'd': ss->media_type = AVMEDIA_TYPE_DATA; break;
case 't': ss->media_type = AVMEDIA_TYPE_ATTACHMENT; break;
case 'V': ss->media_type = AVMEDIA_TYPE_VIDEO;
ss->no_apic = 1; break;
default: av_assert0(0);
}
av_log(logctx, AV_LOG_TRACE, "Parsed media type: %s; remainder: %s\n",
av_get_media_type_string(ss->media_type), spec);
} else if (*spec == 'g' && *(spec + 1) == ':') {
if (ss->stream_list != STREAM_LIST_ALL)
goto multiple_stream_lists;
spec += 2;
if (*spec == '#' || (*spec == 'i' && *(spec + 1) == ':')) {
ss->stream_list = STREAM_LIST_GROUP_ID;
spec += 1 + (*spec == 'i');
} else
ss->stream_list = STREAM_LIST_GROUP_IDX;
ss->list_id = strtol(spec, &endptr, 0);
if (spec == endptr) {
av_log(logctx, AV_LOG_ERROR, "Expected stream group idx/ID, got: %s\n", spec);
ret = AVERROR(EINVAL);
goto fail;
}
spec = endptr;
av_log(logctx, AV_LOG_TRACE, "Parsed stream group %s: %"PRId64"; remainder: %s\n",
ss->stream_list == STREAM_LIST_GROUP_ID ? "ID" : "index", ss->list_id, spec);
} else if (*spec == 'p' && *(spec + 1) == ':') {
if (ss->stream_list != STREAM_LIST_ALL)
goto multiple_stream_lists;
ss->stream_list = STREAM_LIST_PROGRAM;
spec += 2;
ss->list_id = strtol(spec, &endptr, 0);
if (spec == endptr) {
av_log(logctx, AV_LOG_ERROR, "Expected program ID, got: %s\n", spec);
ret = AVERROR(EINVAL);
goto fail;
}
spec = endptr;
av_log(logctx, AV_LOG_TRACE,
"Parsed program ID: %"PRId64"; remainder: %s\n", ss->list_id, spec);
} else if (*spec == '#' ||
(*spec == 'i' && *(spec + 1) == ':')) {
if (ss->stream_list != STREAM_LIST_ALL)
goto multiple_stream_lists;
ss->stream_list = STREAM_LIST_STREAM_ID;
spec += 1 + (*spec == 'i');
ss->list_id = strtol(spec, &endptr, 0);
if (spec == endptr) {
av_log(logctx, AV_LOG_ERROR, "Expected stream ID, got: %s\n", spec);
ret = AVERROR(EINVAL);
goto fail;
}
spec = endptr;
av_log(logctx, AV_LOG_TRACE,
"Parsed stream ID: %"PRId64"; remainder: %s\n", ss->list_id, spec);
// this terminates the specifier
break;
} else if (*spec == 'm' && *(spec + 1) == ':') {
av_assert0(!ss->meta_key && !ss->meta_val);
spec += 2;
ss->meta_key = av_get_token(&spec, ":");
if (!ss->meta_key) {
ret = AVERROR(ENOMEM);
goto fail;
}
if (*spec == ':') {
spec++;
ss->meta_val = av_get_token(&spec, ":");
if (!ss->meta_val) {
ret = AVERROR(ENOMEM);
goto fail;
}
}
av_log(logctx, AV_LOG_TRACE,
"Parsed metadata: %s:%s; remainder: %s", ss->meta_key,
ss->meta_val ? ss->meta_val : "<any value>", spec);
// this terminates the specifier
break;
} else if (*spec == 'u' && (*(spec + 1) == '\0' || *(spec + 1) == ':')) {
ss->usable_only = 1;
spec++;
av_log(logctx, AV_LOG_ERROR, "Parsed 'usable only'\n");
// this terminates the specifier
break;
} else
break;
if (*spec == ':')
spec++;
}
if (*spec) {
if (!allow_remainder) {
av_log(logctx, AV_LOG_ERROR,
"Trailing garbage at the end of a stream specifier: %s\n",
spec);
ret = AVERROR(EINVAL);
goto fail;
}
if (*spec == ':')
spec++;
ss->remainder = av_strdup(spec);
if (!ss->remainder) {
ret = AVERROR(EINVAL);
goto fail;
}
}
return 0;
multiple_stream_lists:
av_log(logctx, AV_LOG_ERROR,
"Cannot combine multiple program/group designators in a "
"single stream specifier");
ret = AVERROR(EINVAL);
fail:
stream_specifier_uninit(ss);
return ret;
}
unsigned stream_specifier_match(const StreamSpecifier *ss,
const AVFormatContext *s, const AVStream *st,
void *logctx)
{
const AVStreamGroup *g = NULL;
const AVProgram *p = NULL;
int start_stream = 0, nb_streams;
int nb_matched = 0;
switch (ss->stream_list) {
case STREAM_LIST_STREAM_ID:
// <n-th> stream with given ID makes no sense and should be impossible to request
av_assert0(ss->idx < 0);
// return early if we know for sure the stream does not match
if (st->id != ss->list_id)
return 0;
start_stream = st->index;
nb_streams = st->index + 1;
break;
case STREAM_LIST_ALL:
start_stream = ss->idx >= 0 ? 0 : st->index;
nb_streams = st->index + 1;
break;
case STREAM_LIST_PROGRAM:
for (unsigned i = 0; i < s->nb_programs; i++) {
if (s->programs[i]->id == ss->list_id) {
p = s->programs[i];
break;
}
}
if (!p) {
av_log(logctx, AV_LOG_WARNING, "No program with ID %"PRId64" exists,"
" stream specifier can never match\n", ss->list_id);
return 0;
}
nb_streams = p->nb_stream_indexes;
break;
case STREAM_LIST_GROUP_ID:
for (unsigned i = 0; i < s->nb_stream_groups; i++) {
if (ss->list_id == s->stream_groups[i]->id) {
g = s->stream_groups[i];
break;
}
}
// fall-through
case STREAM_LIST_GROUP_IDX:
if (ss->stream_list == STREAM_LIST_GROUP_IDX &&
ss->list_id >= 0 && ss->list_id < s->nb_stream_groups)
g = s->stream_groups[ss->list_id];
if (!g) {
av_log(logctx, AV_LOG_WARNING, "No stream group with group %s %"
PRId64" exists, stream specifier can never match\n",
ss->stream_list == STREAM_LIST_GROUP_ID ? "ID" : "index",
ss->list_id);
return 0;
}
nb_streams = g->nb_streams;
break;
default: av_assert0(0);
}
for (int i = start_stream; i < nb_streams; i++) {
const AVStream *candidate = s->streams[g ? g->streams[i]->index :
p ? p->stream_index[i] : i];
if (ss->media_type != AVMEDIA_TYPE_UNKNOWN &&
(ss->media_type != candidate->codecpar->codec_type ||
(ss->no_apic && (candidate->disposition & AV_DISPOSITION_ATTACHED_PIC))))
continue;
if (ss->meta_key) {
const AVDictionaryEntry *tag = av_dict_get(candidate->metadata,
ss->meta_key, NULL, 0);
if (!tag)
continue;
if (ss->meta_val && strcmp(tag->value, ss->meta_val))
continue;
}
if (ss->usable_only) {
const AVCodecParameters *par = candidate->codecpar;
switch (par->codec_type) {
case AVMEDIA_TYPE_AUDIO:
if (!par->sample_rate || !par->ch_layout.nb_channels ||
par->format == AV_SAMPLE_FMT_NONE)
continue;
break;
case AVMEDIA_TYPE_VIDEO:
if (!par->width || !par->height || par->format == AV_PIX_FMT_NONE)
continue;
break;
case AVMEDIA_TYPE_UNKNOWN:
continue;
}
}
if (st == candidate)
return ss->idx < 0 || ss->idx == nb_matched;
nb_matched++;
}
return 0;
}
int check_stream_specifier(AVFormatContext *s, AVStream *st, const char *spec)
{
StreamSpecifier ss;
int ret;
ret = stream_specifier_parse(&ss, spec, 0, NULL);
if (ret < 0)
return ret;
ret = stream_specifier_match(&ss, s, st, NULL);
stream_specifier_uninit(&ss);
return ret;
}
int filter_codec_opts(const AVDictionary *opts, enum AVCodecID codec_id,
AVFormatContext *s, AVStream *st, const AVCodec *codec,
AVDictionary **dst, AVDictionary **opts_used)
{
AVDictionary *ret = NULL;
const AVDictionaryEntry *t = NULL;
int flags = s->oformat ? AV_OPT_FLAG_ENCODING_PARAM
: AV_OPT_FLAG_DECODING_PARAM;
char prefix = 0;
const AVClass *cc = avcodec_get_class();
switch (st->codecpar->codec_type) {
case AVMEDIA_TYPE_VIDEO:
prefix = 'v';
flags |= AV_OPT_FLAG_VIDEO_PARAM;
break;
case AVMEDIA_TYPE_AUDIO:
prefix = 'a';
flags |= AV_OPT_FLAG_AUDIO_PARAM;
break;
case AVMEDIA_TYPE_SUBTITLE:
prefix = 's';
flags |= AV_OPT_FLAG_SUBTITLE_PARAM;
break;
}
while (t = av_dict_iterate(opts, t)) {
const AVClass *priv_class;
char *p = strchr(t->key, ':');
int used = 0;
/* check stream specification in opt name */
if (p) {
int err = check_stream_specifier(s, st, p + 1);
if (err < 0) {
av_dict_free(&ret);
return err;
} else if (!err)
continue;
*p = 0;
}
if (av_opt_find(&cc, t->key, NULL, flags, AV_OPT_SEARCH_FAKE_OBJ) ||
!codec ||
((priv_class = codec->priv_class) &&
av_opt_find(&priv_class, t->key, NULL, flags,
AV_OPT_SEARCH_FAKE_OBJ))) {
av_dict_set(&ret, t->key, t->value, 0);
used = 1;
} else if (t->key[0] == prefix &&
av_opt_find(&cc, t->key + 1, NULL, flags,
AV_OPT_SEARCH_FAKE_OBJ)) {
av_dict_set(&ret, t->key + 1, t->value, 0);
used = 1;
}
if (p)
*p = ':';
if (used && opts_used)
av_dict_set(opts_used, t->key, "", 0);
}
*dst = ret;
return 0;
}
int setup_find_stream_info_opts(AVFormatContext *s,
AVDictionary *codec_opts,
AVDictionary ***dst)
{
int ret;
AVDictionary **opts;
*dst = NULL;
if (!s->nb_streams)
return 0;
opts = av_calloc(s->nb_streams, sizeof(*opts));
if (!opts)
return AVERROR(ENOMEM);
for (int i = 0; i < s->nb_streams; i++) {
ret = filter_codec_opts(codec_opts, s->streams[i]->codecpar->codec_id,
s, s->streams[i], NULL, &opts[i], NULL);
if (ret < 0)
goto fail;
}
*dst = opts;
return 0;
fail:
for (int i = 0; i < s->nb_streams; i++)
av_dict_free(&opts[i]);
av_freep(&opts);
return ret;
}
int grow_array(void **array, int elem_size, int *size, int new_size)
{
if (new_size >= INT_MAX / elem_size) {
av_log(NULL, AV_LOG_ERROR, "Array too big.\n");
return AVERROR(ERANGE);
}
if (*size < new_size) {
uint8_t *tmp = av_realloc_array(*array, new_size, elem_size);
if (!tmp)
return AVERROR(ENOMEM);
memset(tmp + *size*elem_size, 0, (new_size-*size) * elem_size);
*size = new_size;
*array = tmp;
return 0;
}
return 0;
}
void *allocate_array_elem(void *ptr, size_t elem_size, int *nb_elems)
{
void *new_elem;
if (!(new_elem = av_mallocz(elem_size)) ||
av_dynarray_add_nofree(ptr, nb_elems, new_elem) < 0)
return NULL;
return new_elem;
}
double get_rotation(const int32_t *displaymatrix)
{
double theta = 0;
if (displaymatrix)
theta = -round(av_display_rotation_get(displaymatrix));
theta -= 360*floor(theta/360 + 0.9/360);
if (fabs(theta - 90*round(theta/90)) > 2)
av_log(NULL, AV_LOG_WARNING, "Odd rotation angle.\n"
"If you want to help, upload a sample "
"of this file to https://streams.videolan.org/upload/ "
"and contact the ffmpeg-devel mailing list. (ffmpeg-devel@ffmpeg.org)");
return theta;
}
/* read file contents into a string */
char *file_read(const char *filename)
{
AVIOContext *pb = NULL;
int ret = avio_open(&pb, filename, AVIO_FLAG_READ);
AVBPrint bprint;
char *str;
if (ret < 0) {
av_log(NULL, AV_LOG_ERROR, "Error opening file %s.\n", filename);
return NULL;
}
av_bprint_init(&bprint, 0, AV_BPRINT_SIZE_UNLIMITED);
ret = avio_read_to_bprint(pb, &bprint, SIZE_MAX);
avio_closep(&pb);
if (ret < 0) {
av_bprint_finalize(&bprint, NULL);
return NULL;
}
ret = av_bprint_finalize(&bprint, &str);
if (ret < 0)
return NULL;
return str;
}
void remove_avoptions(AVDictionary **a, AVDictionary *b)
{
const AVDictionaryEntry *t = NULL;
while ((t = av_dict_iterate(b, t))) {
av_dict_set(a, t->key, NULL, AV_DICT_MATCH_CASE);
}
}
int check_avoptions(AVDictionary *m)
{
const AVDictionaryEntry *t = av_dict_iterate(m, NULL);
if (t) {
av_log(NULL, AV_LOG_FATAL, "Option %s not found.\n", t->key);
return AVERROR_OPTION_NOT_FOUND;
}
return 0;
}
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