Subversion Repositories Kolibri OS

/*

 * 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 

#include 

#include 

#include 

#include 

/* 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 "libavfilter/avfilter.h"

#include "libavdevice/avdevice.h"

#include "libavresample/avresample.h"

#include "libswscale/swscale.h"

#include "libswresample/swresample.h"

#include "libpostproc/postprocess.h"

#include "libavutil/avassert.h"

#include "libavutil/avstring.h"

#include "libavutil/bprint.h"

#include "libavutil/display.h"

#include "libavutil/mathematics.h"

#include "libavutil/imgutils.h"

#include "libavutil/libm.h"

#include "libavutil/parseutils.h"

#include "libavutil/pixdesc.h"

#include "libavutil/eval.h"

#include "libavutil/dict.h"

#include "libavutil/opt.h"

#include "libavutil/cpu.h"

#include "libavutil/ffversion.h"

#include "cmdutils.h"

#if CONFIG_NETWORK

#include "libavformat/network.h"

#endif

#if HAVE_SYS_RESOURCE_H

#include 

#include 

#endif

static int init_report(const char *env);

AVDictionary *sws_dict;

AVDictionary *swr_opts;

AVDictionary *format_opts, *codec_opts, *resample_opts;

static FILE *report_file;

static int report_file_level = AV_LOG_DEBUG;

int hide_banner = 0;

void init_opts(void)

{

    av_dict_set(&sws_dict, "flags", "bicubic", 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);

    av_dict_free(&resample_opts);

}

void log_callback_help(void *ptr, int level, const char *fmt, va_list vl)

{

    vfprintf(stdout, fmt, vl);

}

static void log_callback_report(void *ptr, int level, const char *fmt, va_list vl)

{

    va_list vl2;

    char line[1024];

    static int print_prefix = 1;

    va_copy(vl2, vl);

    av_log_default_callback(ptr, level, fmt, vl);

    av_log_format_line(ptr, level, fmt, vl2, line, sizeof(line), &print_prefix);

    va_end(vl2);

    if (report_file_level >= level) {

        fputs(line, report_file);

        fflush(report_file);

    }

}

static void (*program_exit)(int ret);

void register_exit(void (*cb)(int ret))

{

    program_exit = cb;

}

void exit_program(int ret)

{

    if (program_exit)

        program_exit(ret);

    exit(ret);

}

double parse_number_or_die(const char *context, const char *numstr, int type,

                           double min, double max)

{

    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_INT64 && (int64_t)d != d)

        error = "Expected int64 for %s but found %s\n";

    else if (type == OPT_INT && (int)d != d)

        error = "Expected int for %s but found %s\n";

    else

        return d;

    av_log(NULL, AV_LOG_FATAL, error, context, numstr, min, max);

    exit_program(1);

    return 0;

}

int64_t parse_time_or_die(const char *context, const char *timestr,

                          int is_duration)

{

    int64_t us;

    if (av_parse_time(&us, timestr, is_duration) < 0) {

        av_log(NULL, AV_LOG_FATAL, "Invalid %s specification for %s: %s\n",

               is_duration ? "duration" : "date", context, timestr);

        exit_program(1);

    }

    return us;

}

void show_help_options(const OptionDef *options, const char *msg, int req_flags,

                       int rej_flags, int alt_flags)

{

    const OptionDef *po;

    int first;

    first = 1;

    for (po = options; po->name; po++) {

        char buf[64];

        if (((po->flags & req_flags) != req_flags) ||

            (alt_flags && !(po->flags & alt_flags)) ||

            (po->flags & rej_flags))

            continue;

        if (first) {

            printf("%s\n", msg);

            first = 0;

        }

        av_strlcpy(buf, po->name, sizeof(buf));

        if (po->argname) {

            av_strlcat(buf, " ", sizeof(buf));

            av_strlcat(buf, po->argname, sizeof(buf));

        }

        printf("-%-17s  %s\n", buf, po->help);

    }

    printf("\n");

}

void show_help_children(const AVClass *class, int flags)

{

    const AVClass *child = NULL;

    if (class->option) {

        av_opt_show2(&class, NULL, flags, 0);

        printf("\n");

    }

    while (child = av_opt_child_class_next(class, child))

        show_help_children(child, flags);

}

static const OptionDef *find_option(const OptionDef *po, const char *name)

{

    const char *p = strchr(name, ':');

    int len = p ? p - name : strlen(name);

    while (po->name) {

        if (!strncmp(name, po->name, len) && strlen(po->name) == len)

            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 

#include 

/* 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 write_option(void *optctx, const OptionDef *po, const char *opt,

                        const char *arg)

{

    /* new-style options contain an offset into optctx, old-style address of

     * a global var*/

    void *dst = po->flags & (OPT_OFFSET | OPT_SPEC) ?

                (uint8_t *)optctx + po->u.off : po->u.dst_ptr;

    int *dstcount;

    if (po->flags & OPT_SPEC) {

        SpecifierOpt **so = dst;

        char *p = strchr(opt, ':');

        char *str;

        dstcount = (int *)(so + 1);

        *so = grow_array(*so, sizeof(**so), dstcount, *dstcount + 1);

        str = av_strdup(p ? p + 1 : "");

        if (!str)

            return AVERROR(ENOMEM);

        (*so)[*dstcount - 1].specifier = str;

        dst = &(*so)[*dstcount - 1].u;

    }

    if (po->flags & OPT_STRING) {

        char *str;

        str = av_strdup(arg);

        av_freep(dst);

        if (!str)

            return AVERROR(ENOMEM);

        *(char **)dst = str;

    } else if (po->flags & OPT_BOOL || po->flags & OPT_INT) {

        *(int *)dst = parse_number_or_die(opt, arg, OPT_INT64, INT_MIN, INT_MAX);

    } else if (po->flags & OPT_INT64) {

        *(int64_t *)dst = parse_number_or_die(opt, arg, OPT_INT64, INT64_MIN, INT64_MAX);

    } else if (po->flags & OPT_TIME) {

        *(int64_t *)dst = parse_time_or_die(opt, arg, 1);

    } else if (po->flags & OPT_FLOAT) {

        *(float *)dst = parse_number_or_die(opt, arg, OPT_FLOAT, -INFINITY, INFINITY);

    } else if (po->flags & OPT_DOUBLE) {

        *(double *)dst = parse_number_or_die(opt, arg, OPT_DOUBLE, -INFINITY, INFINITY);

    } else if (po->u.func_arg) {

        int 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));

            return ret;

        }

    }

    if (po->flags & OPT_EXIT)

        exit_program(0);

    return 0;

}

int parse_option(void *optctx, const char *opt, const char *arg,

                 const OptionDef *options)

{

    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->flags & OPT_BOOL)))

            arg = "0";

    } else if (po->flags & OPT_BOOL)

        arg = "1";

    if (!po->name)

        po = find_option(options, "default");

    if (!po->name) {

        av_log(NULL, AV_LOG_ERROR, "Unrecognized option '%s'\n", opt);

        return AVERROR(EINVAL);

    }

    if (po->flags & HAS_ARG && !arg) {

        av_log(NULL, AV_LOG_ERROR, "Missing argument for option '%s'\n", opt);

        return AVERROR(EINVAL);

    }

    ret = write_option(optctx, po, opt, arg);

    if (ret < 0)

        return ret;

    return !!(po->flags & HAS_ARG);

}

void parse_options(void *optctx, int argc, char **argv, const OptionDef *options,

                   void (*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)

                exit_program(1);

            optindex += ret;

        } else {

            if (parse_arg_function)

                parse_arg_function(optctx, opt);

        }

    }

}

int parse_optgroup(void *optctx, OptionGroup *g)

{

    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);

        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 || po->flags & HAS_ARG)

            i++;

    }

    return 0;

}

static void dump_argument(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));

        po++;

    }

}

void parse_loglevel(int argc, char **argv, const OptionDef *options)

{

    int idx = locate_option(argc, argv, options, "loglevel");

    const 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");

    if ((env = getenv("FFREPORT")) || idx) {

        init_report(env);

        if (report_file) {

            int i;

            fprintf(report_file, "Command line:\n");

            for (i = 0; i < argc; i++) {

                dump_argument(argv[i]);

                fputc(i < argc - 1 ? ' ' : '\n', report_file);

            }

            fflush(report_file);

        }

    }

    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_AVRESAMPLE

    const AVClass *rc = avresample_get_class();

#endif

    const AVClass *sc, *swr_class;

    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

    sc = sws_get_class();

    if (!consumed && (o = opt_find(&sc, opt, NULL, 0,

                         AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ))) {

        struct SwsContext *sws = sws_alloc_context();

        int ret = av_opt_set(sws, opt, arg, 0);

        sws_freeContext(sws);

        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);

        }

        if (ret < 0) {

            av_log(NULL, AV_LOG_ERROR, "Error setting option %s.\n", opt);

            return ret;

        }

        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

    swr_class = swr_get_class();

    if (!consumed && (o=opt_find(&swr_class, opt, NULL, 0,

                                    AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ))) {

        struct SwrContext *swr = swr_alloc();

        int ret = av_opt_set(swr, opt, arg, 0);

        swr_free(&swr);

        if (ret < 0) {

            av_log(NULL, AV_LOG_ERROR, "Error setting option %s.\n", opt);

            return ret;

        }

        av_dict_set(&swr_opts, opt, arg, FLAGS);

        consumed = 1;

    }

#endif

#if CONFIG_AVRESAMPLE

    if ((o=opt_find(&rc, opt, NULL, 0,

                       AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ))) {

        av_dict_set(&resample_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 void finish_group(OptionParseContext *octx, int group_idx,

                         const char *arg)

{

    OptionGroupList *l = &octx->groups[group_idx];

    OptionGroup *g;

    GROW_ARRAY(l->groups, l->nb_groups);

    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;

    g->resample_opts = resample_opts;

    codec_opts  = NULL;

    format_opts = NULL;

    resample_opts = NULL;

    sws_dict    = NULL;

    swr_opts    = NULL;

    init_opts();

    memset(&octx->cur_group, 0, sizeof(octx->cur_group));

}

/*

 * Add an option instance to currently parsed group.

 */

static void add_opt(OptionParseContext *octx, const OptionDef *opt,

                    const char *key, const char *val)

{

    int global = !(opt->flags & (OPT_PERFILE | OPT_SPEC | OPT_OFFSET));

    OptionGroup *g = global ? &octx->global_opts : &octx->cur_group;

    GROW_ARRAY(g->opts, g->nb_opts);

    g->opts[g->nb_opts - 1].opt = opt;

    g->opts[g->nb_opts - 1].key = key;

    g->opts[g->nb_opts - 1].val = val;

}

static void 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->nb_groups = nb_groups;

    octx->groups    = av_mallocz_array(octx->nb_groups, sizeof(*octx->groups));

    if (!octx->groups)

        exit_program(1);

    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       = "";

    init_opts();

}

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].resample_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 optindex = 1;

    int dashdash = -2;

    /* perform system-dependent conversions for arguments list */

    prepare_app_arguments(&argc, &argv);

    init_parse_context(octx, groups, nb_groups);

    av_log(NULL, AV_LOG_DEBUG, "Splitting the commandline.\n");

    while (optindex < argc) {

        const char *opt = argv[optindex++], *arg;

        const OptionDef *po;

        int ret;

        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) {

            finish_group(octx, 0, opt);

            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 */

        if ((ret = match_group_separator(groups, nb_groups, opt)) >= 0) {

            GET_ARG(arg);

            finish_group(octx, ret, arg);

            av_log(NULL, AV_LOG_DEBUG, " matched as %s with argument '%s'.\n",

                   groups[ret].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 (po->flags & HAS_ARG) {

                GET_ARG(arg);

            } else {

                arg = "1";

            }

            add_opt(octx, po, opt, arg);

            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->flags & OPT_BOOL) {

            add_opt(octx, po, opt, "0");

            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 || resample_opts)

        av_log(NULL, AV_LOG_WARNING, "Trailing options were found on the "

               "commandline.\n");

    av_log(NULL, AV_LOG_DEBUG, "Finished splitting the commandline.\n");

    return 0;

}

int opt_cpuflags(void *optctx, const char *opt, const char *arg)

{

    int ret;

    unsigned flags = av_get_cpu_flags();

    if ((ret = av_parse_cpu_caps(&flags, arg)) < 0)

        return ret;

    av_force_cpu_flags(flags);

    return 0;

}

int opt_loglevel(void *optctx, const char *opt, const char *arg)

{

    const struct { const char *name; int level; } log_levels[] = {

        { "quiet"  , AV_LOG_QUIET   },

        { "panic"  , AV_LOG_PANIC   },

        { "fatal"  , AV_LOG_FATAL   },

        { "error"  , AV_LOG_ERROR   },

        { "warning", AV_LOG_WARNING },

        { "info"   , AV_LOG_INFO    },

        { "verbose", AV_LOG_VERBOSE },

        { "debug"  , AV_LOG_DEBUG   },

        { "trace"  , AV_LOG_TRACE   },

    };

    char *tail;

    int level;

    int flags;

    int i;

    flags = av_log_get_flags();

    tail = strstr(arg, "repeat");

    if (tail)

        flags &= ~AV_LOG_SKIP_REPEATED;

    else

        flags |= AV_LOG_SKIP_REPEATED;

    av_log_set_flags(flags);

    if (tail == arg)

        arg += 6 + (arg[6]=='+');

    if(tail && !*arg)

        return 0;

    for (i = 0; i < FF_ARRAY_ELEMS(log_levels); i++) {

        if (!strcmp(log_levels[i].name, arg)) {

            av_log_set_level(log_levels[i].level);

            return 0;

        }

    }

    level = strtol(arg, &tail, 10);

    if (*tail) {

        av_log(NULL, AV_LOG_FATAL, "Invalid loglevel \"%s\". "

               "Possible levels are numbers or:\n", arg);

        for (i = 0; i < FF_ARRAY_ELEMS(log_levels); i++)

            av_log(NULL, AV_LOG_FATAL, "\"%s\"\n", log_levels[i].name);

        exit_program(1);

    }

    av_log_set_level(level);

    return 0;

}

static void expand_filename_template(AVBPrint *bp, const char *template,

                                     struct tm *tm)

{

    int c;

    while ((c = *(template++))) {

        if (c == '%') {

            if (!(c = *(template++)))

                break;

            switch (c) {

            case 'p':

                av_bprintf(bp, "%s", program_name);

                break;

            case 't':

                av_bprintf(bp, "%04d%02d%02d-%02d%02d%02d",

                           tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,

                           tm->tm_hour, tm->tm_min, tm->tm_sec);

                break;

            case '%':

                av_bprint_chars(bp, c, 1);

                break;

            }

        } else {

            av_bprint_chars(bp, c, 1);

        }

    }

}

static int init_report(const char *env)

{

    char *filename_template = NULL;

    char *key, *val;

    int ret, count = 0;

    time_t now;

    struct tm *tm;

    AVBPrint filename;

    if (report_file) /* already opened */

        return 0;

    time(&now);

    tm = localtime(&now);

    while (env && *env) {

        if ((ret = av_opt_get_key_value(&env, "=", ":", 0, &key, &val)) < 0) {

            if (count)

                av_log(NULL, AV_LOG_ERROR,

                       "Failed to parse FFREPORT environment variable: %s\n",

                       av_err2str(ret));

            break;

        }

        if (*env)

            env++;

        count++;

        if (!strcmp(key, "file")) {

            av_free(filename_template);

            filename_template = val;

            val = NULL;

        } else if (!strcmp(key, "level")) {

            char *tail;

            report_file_level = strtol(val, &tail, 10);

            if (*tail) {

                av_log(NULL, AV_LOG_FATAL, "Invalid report file level\n");

                exit_program(1);

            }

        } else {

            av_log(NULL, AV_LOG_ERROR, "Unknown key '%s' in FFREPORT\n", key);

        }

        av_free(val);

        av_free(key);

    }

    av_bprint_init(&filename, 0, 1);

    expand_filename_template(&filename,

                             av_x_if_null(filename_template, "%p-%t.log"), tm);

    av_free(filename_template);

    if (!av_bprint_is_complete(&filename)) {

        av_log(NULL, AV_LOG_ERROR, "Out of memory building report file name\n");

        return AVERROR(ENOMEM);

    }

    report_file = fopen(filename.str, "w");

    if (!report_file) {

        int ret = AVERROR(errno);

        av_log(NULL, AV_LOG_ERROR, "Failed to open report \"%s\": %s\n",

               filename.str, strerror(errno));

        return ret;

    }

    av_log_set_callback(log_callback_report);

    av_log(NULL, AV_LOG_INFO,

           "%s started on %04d-%02d-%02d at %02d:%02d:%02d\n"

           "Report written to \"%s\"\n",

           program_name,

           tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,

           tm->tm_hour, tm->tm_min, tm->tm_sec,

           filename.str);

    av_bprint_finalize(&filename, NULL);

    return 0;

}

int opt_report(const char *opt)

{

    return init_report(NULL);

}

int opt_max_alloc(void *optctx, const char *opt, const char *arg)

{

    char *tail;

    size_t max;

    max = strtol(arg, &tail, 10);

    if (*tail) {

        av_log(NULL, AV_LOG_FATAL, "Invalid max_alloc \"%s\".\n", arg);

        exit_program(1);

    }

    av_max_alloc(max);

    return 0;

}

int opt_timelimit(void *optctx, const char *opt, const char *arg)

{

#if HAVE_SETRLIMIT

    int lim = parse_number_or_die(opt, arg, OPT_INT64, 0, INT_MAX);

    struct rlimit rl = { lim, lim + 1 };

    if (setrlimit(RLIMIT_CPU, &rl))

        perror("setrlimit");

#else

    av_log(NULL, AV_LOG_WARNING, "-%s not implemented on this OS\n", opt);

#endif

    return 0;

}

void print_error(const char *filename, int err)

{

    char errbuf[128];

    const char *errbuf_ptr = errbuf;

    if (av_strerror(err, errbuf, sizeof(errbuf)) < 0)

        errbuf_ptr = strerror(AVUNERROR(err));

    av_log(NULL, AV_LOG_ERROR, "%s: %s\n", filename, errbuf_ptr);

}

static int warned_cfg = 0;

#define INDENT        1

#define SHOW_VERSION  2

#define SHOW_CONFIG   4

#define SHOW_COPYRIGHT 8

#define PRINT_LIB_INFO(libname, LIBNAME, flags, level)                  \

    if (CONFIG_##LIBNAME) {                                             \

        const char *indent = flags & INDENT? "  " : "";                 \

        if (flags & SHOW_VERSION) {                                     \

            unsigned int version = libname##_version();                 \

            av_log(NULL, level,                                         \

                   "%slib%-11s %2d.%3d.%3d / %2d.%3d.%3d\n",            \

                   indent, #libname,                                    \

                   LIB##LIBNAME##_VERSION_MAJOR,                        \

                   LIB##LIBNAME##_VERSION_MINOR,                        \

                   LIB##LIBNAME##_VERSION_MICRO,                        \

                   version >> 16, version >> 8 & 0xff, version & 0xff); \

        }                                                               \

        if (flags & SHOW_CONFIG) {                                      \

            const char *cfg = libname##_configuration();                \

            if (strcmp(FFMPEG_CONFIGURATION, cfg)) {                    \

                if (!warned_cfg) {                                      \

                    av_log(NULL, level,                                 \

                            "%sWARNING: library configuration mismatch\n", \

                            indent);                                    \

                    warned_cfg = 1;                                     \

                }                                                       \

                av_log(NULL, level, "%s%-11s configuration: %s\n",      \

                        indent, #libname, cfg);                         \

            }                                                           \

        }                                                               \

    }                                                                   \

static void print_all_libs_info(int flags, int level)

{

    PRINT_LIB_INFO(avutil,   AVUTIL,   flags, level);

    PRINT_LIB_INFO(avcodec,  AVCODEC,  flags, level);

    PRINT_LIB_INFO(avformat, AVFORMAT, flags, level);

    PRINT_LIB_INFO(avdevice, AVDEVICE, flags, level);

    PRINT_LIB_INFO(avfilter, AVFILTER, flags, level);

    PRINT_LIB_INFO(avresample, AVRESAMPLE, flags, level);

    PRINT_LIB_INFO(swscale,  SWSCALE,  flags, level);

    PRINT_LIB_INFO(swresample,SWRESAMPLE,  flags, level);

    PRINT_LIB_INFO(postproc, POSTPROC, flags, level);

}

static void print_program_info(int flags, int level)

{

    const char *indent = flags & INDENT? "  " : "";

    av_log(NULL, level, "%s version " FFMPEG_VERSION, program_name);

    if (flags & SHOW_COPYRIGHT)

        av_log(NULL, level, " Copyright (c) %d-%d the FFmpeg developers",

               program_birth_year, CONFIG_THIS_YEAR);

    av_log(NULL, level, "\n");

    av_log(NULL, level, "%sbuilt with %s\n", indent, CC_IDENT);

    av_log(NULL, level, "%sconfiguration: " FFMPEG_CONFIGURATION "\n", indent);

}

static void print_buildconf(int flags, int level)

{

    const char *indent = flags & INDENT ? "  " : "";

    char str[] = { FFMPEG_CONFIGURATION };

    char *conflist, *remove_tilde, *splitconf;

    // Change all the ' --' strings to '~--' so that

    // they can be identified as tokens.

    while ((conflist = strstr(str, " --")) != NULL) {

        strncpy(conflist, "~--", 3);

    }

    // Compensate for the weirdness this would cause

    // when passing 'pkg-config --static'.

    while ((remove_tilde = strstr(str, "pkg-config~")) != NULL) {

        strncpy(remove_tilde, "pkg-config ", 11);

    }

    splitconf = strtok(str, "~");

    av_log(NULL, level, "\n%sconfiguration:\n", indent);

    while (splitconf != NULL) {

        av_log(NULL, level, "%s%s%s\n", indent, indent, splitconf);

        splitconf = strtok(NULL, "~");

    }

}

void show_banner(int argc, char **argv, const OptionDef *options)