cmdutils.c 64.7 KB
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/*
 * Various utilities for command line tools
 * Copyright (c) 2000-2003 Fabrice Bellard
 *
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 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * 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
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#include <string.h>
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#include <stdint.h>
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#include <stdlib.h>
#include <errno.h>
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#include <math.h>
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/* 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. */

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#include "config.h"
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#include "compat/va_copy.h"
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#include "libavformat/avformat.h"
#include "libavfilter/avfilter.h"
#include "libavdevice/avdevice.h"
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#include "libavresample/avresample.h"
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#include "libswscale/swscale.h"
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#include "libswresample/swresample.h"
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#include "libpostproc/postprocess.h"
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#include "libavutil/avassert.h"
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#include "libavutil/avstring.h"
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#include "libavutil/bprint.h"
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#include "libavutil/mathematics.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/parseutils.h"
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#include "libavutil/pixdesc.h"
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#include "libavutil/eval.h"
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#include "libavutil/dict.h"
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#include "libavutil/opt.h"
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#include "libavutil/cpu.h"
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#include "libavutil/ffversion.h"
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#include "cmdutils.h"
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#if CONFIG_NETWORK
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#include "libavformat/network.h"
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#endif
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#if HAVE_SYS_RESOURCE_H
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#include <sys/time.h>
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#include <sys/resource.h>
#endif
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static int init_report(const char *env);

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struct SwsContext *sws_opts;
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AVDictionary *swr_opts;
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AVDictionary *format_opts, *codec_opts, *resample_opts;
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static FILE *report_file;
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static int report_file_level = AV_LOG_DEBUG;
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int hide_banner = 0;
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void init_opts(void)
{
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    if(CONFIG_SWSCALE)
        sws_opts = sws_getContext(16, 16, 0, 16, 16, 0, SWS_BICUBIC,
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                              NULL, NULL, NULL);
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}

void uninit_opts(void)
{
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#if CONFIG_SWSCALE
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    sws_freeContext(sws_opts);
    sws_opts = NULL;
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#endif
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    av_dict_free(&swr_opts);
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    av_dict_free(&format_opts);
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    av_dict_free(&codec_opts);
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    av_dict_free(&resample_opts);
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}

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void log_callback_help(void *ptr, int level, const char *fmt, va_list vl)
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{
    vfprintf(stdout, fmt, vl);
}

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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);
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    if (report_file_level >= level) {
        fputs(line, report_file);
        fflush(report_file);
    }
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}

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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);
}

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double parse_number_or_die(const char *context, const char *numstr, int type,
                           double min, double max)
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{
    char *tail;
    const char *error;
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    double d = av_strtod(numstr, &tail);
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    if (*tail)
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        error = "Expected number for %s but found: %s\n";
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    else if (d < min || d > max)
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        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";
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    else if (type == OPT_INT && (int)d != d)
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        error = "Expected int for %s but found %s\n";
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    else
        return d;
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    av_log(NULL, AV_LOG_FATAL, error, context, numstr, min, max);
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    exit_program(1);
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    return 0;
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}

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int64_t parse_time_or_die(const char *context, const char *timestr,
                          int is_duration)
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{
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    int64_t us;
    if (av_parse_time(&us, timestr, is_duration) < 0) {
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        av_log(NULL, AV_LOG_FATAL, "Invalid %s specification for %s: %s\n",
               is_duration ? "duration" : "date", context, timestr);
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        exit_program(1);
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    }
    return us;
}

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void show_help_options(const OptionDef *options, const char *msg, int req_flags,
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                       int rej_flags, int alt_flags)
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{
    const OptionDef *po;
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    int first;
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    first = 1;
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    for (po = options; po->name != NULL; po++) {
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        char buf[64];
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        if (((po->flags & req_flags) != req_flags) ||
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            (alt_flags && !(po->flags & alt_flags)) ||
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            (po->flags & rej_flags))
            continue;

        if (first) {
            printf("%s\n", msg);
            first = 0;
        }
        av_strlcpy(buf, po->name, sizeof(buf));
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        if (po->argname) {
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            av_strlcat(buf, " ", sizeof(buf));
            av_strlcat(buf, po->argname, sizeof(buf));
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        }
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        printf("-%-17s  %s\n", buf, po->help);
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    }
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    printf("\n");
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}

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void show_help_children(const AVClass *class, int flags)
{
    const AVClass *child = NULL;
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    if (class->option) {
        av_opt_show2(&class, NULL, flags, 0);
        printf("\n");
    }
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    while (child = av_opt_child_class_next(class, child))
        show_help_children(child, flags);
}

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static const OptionDef *find_option(const OptionDef *po, const char *name)
{
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    const char *p = strchr(name, ':');
    int len = p ? p - name : strlen(name);

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    while (po->name != NULL) {
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        if (!strncmp(name, po->name, len) && strlen(po->name) == len)
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            break;
        po++;
    }
    return po;
}

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/* _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)
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#include <windows.h>
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#include <shellapi.h>
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/* 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);

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    win32_argv_utf8 = av_mallocz(sizeof(char *) * (win32_argc + 1) + buffsize);
    argstr_flat     = (char *)win32_argv_utf8 + sizeof(char *) * (win32_argc + 1);
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    if (win32_argv_utf8 == NULL) {
        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 */
}
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#endif /* HAVE_COMMANDLINETOARGVW */
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static int write_option(void *optctx, const OptionDef *po, const char *opt,
                        const char *arg)
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{
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    /* new-style options contain an offset into optctx, old-style address of
     * a global var*/
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    void *dst = po->flags & (OPT_OFFSET | OPT_SPEC) ?
                (uint8_t *)optctx + po->u.off : po->u.dst_ptr;
    int *dstcount;
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    if (po->flags & OPT_SPEC) {
        SpecifierOpt **so = dst;
        char *p = strchr(opt, ':');

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        dstcount = (int *)(so + 1);
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        *so = grow_array(*so, sizeof(**so), dstcount, *dstcount + 1);
        (*so)[*dstcount - 1].specifier = av_strdup(p ? p + 1 : "");
        dst = &(*so)[*dstcount - 1].u;
    }
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    if (po->flags & OPT_STRING) {
        char *str;
        str = av_strdup(arg);
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        av_freep(dst);
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        *(char **)dst = str;
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    } else if (po->flags & OPT_BOOL || po->flags & OPT_INT) {
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        *(int *)dst = parse_number_or_die(opt, arg, OPT_INT64, INT_MIN, INT_MAX);
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    } else if (po->flags & OPT_INT64) {
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        *(int64_t *)dst = parse_number_or_die(opt, arg, OPT_INT64, INT64_MIN, INT64_MAX);
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    } else if (po->flags & OPT_TIME) {
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        *(int64_t *)dst = parse_time_or_die(opt, arg, 1);
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    } else if (po->flags & OPT_FLOAT) {
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        *(float *)dst = parse_number_or_die(opt, arg, OPT_FLOAT, -INFINITY, INFINITY);
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    } else if (po->flags & OPT_DOUBLE) {
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        *(double *)dst = parse_number_or_die(opt, arg, OPT_DOUBLE, -INFINITY, INFINITY);
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    } else if (po->u.func_arg) {
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        int ret = po->u.func_arg(optctx, opt, arg);
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        if (ret < 0) {
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            av_log(NULL, AV_LOG_ERROR,
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                   "Failed to set value '%s' for option '%s': %s\n",
                   arg, opt, av_err2str(ret));
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            return ret;
        }
    }
    if (po->flags & OPT_EXIT)
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        exit_program(0);
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    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;

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

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void parse_options(void *optctx, int argc, char **argv, const OptionDef *options,
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                   void (*parse_arg_function)(void *, const char*))
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{
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    const char *opt;
    int optindex, handleoptions = 1, ret;
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    /* perform system-dependent conversions for arguments list */
    prepare_app_arguments(&argc, &argv);

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    /* parse options */
    optindex = 1;
    while (optindex < argc) {
        opt = argv[optindex++];
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        if (handleoptions && opt[0] == '-' && opt[1] != '\0') {
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            if (opt[1] == '-' && opt[2] == '\0') {
                handleoptions = 0;
                continue;
            }
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            opt++;
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            if ((ret = parse_option(optctx, opt, argv[optindex], options)) < 0)
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                exit_program(1);
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            optindex += ret;
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        } else {
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            if (parse_arg_function)
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                parse_arg_function(optctx, opt);
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        }
    }
}

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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];

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        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);
        }

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        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;
}

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int locate_option(int argc, char **argv, const OptionDef *options,
                  const char *optname)
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{
    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;

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        if (po->flags & HAS_ARG)
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            i++;
    }
    return 0;
}

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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);
}

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void parse_loglevel(int argc, char **argv, const OptionDef *options)
{
    int idx = locate_option(argc, argv, options, "loglevel");
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    const char *env;
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    if (!idx)
        idx = locate_option(argc, argv, options, "v");
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    if (idx && argv[idx + 1])
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        opt_loglevel(NULL, "loglevel", argv[idx + 1]);
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    idx = locate_option(argc, argv, options, "report");
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    if ((env = getenv("FFREPORT")) || idx) {
        init_report(env);
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        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);
        }
    }
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    idx = locate_option(argc, argv, options, "hide_banner");
    if (idx)
        hide_banner = 1;
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}

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static const AVOption *opt_find(void *obj, const char *name, const char *unit,
                            int opt_flags, int search_flags)
{
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    const AVOption *o = av_opt_find(obj, name, unit, opt_flags, search_flags);
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    if(o && !o->flags)
        return NULL;
    return o;
}

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#define FLAGS (o->type == AV_OPT_TYPE_FLAGS) ? AV_DICT_APPEND : 0
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int opt_default(void *optctx, const char *opt, const char *arg)
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{
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    const AVOption *o;
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    int consumed = 0;
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    char opt_stripped[128];
    const char *p;
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    const AVClass *cc = avcodec_get_class(), *fc = avformat_get_class();
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#if CONFIG_AVRESAMPLE
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    const AVClass *rc = avresample_get_class();
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#endif
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    const AVClass *sc, *swr_class;
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    if (!strcmp(opt, "debug") || !strcmp(opt, "fdebug"))
        av_log_set_level(AV_LOG_DEBUG);

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    if (!(p = strchr(opt, ':')))
        p = opt + strlen(opt);
    av_strlcpy(opt_stripped, opt, FFMIN(sizeof(opt_stripped), p - opt + 1));

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    if ((o = opt_find(&cc, opt_stripped, NULL, 0,
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                         AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)) ||
        ((opt[0] == 'v' || opt[0] == 'a' || opt[0] == 's') &&
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         (o = opt_find(&cc, opt + 1, NULL, 0, AV_OPT_SEARCH_FAKE_OBJ)))) {
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        av_dict_set(&codec_opts, opt, arg, FLAGS);
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        consumed = 1;
    }
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    if ((o = opt_find(&fc, opt, NULL, 0,
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                         AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ))) {
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        av_dict_set(&format_opts, opt, arg, FLAGS);
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        if (consumed)
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            av_log(NULL, AV_LOG_VERBOSE, "Routing option %s to both codec and muxer layer\n", opt);
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        consumed = 1;
    }
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#if CONFIG_SWSCALE
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    sc = sws_get_class();
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    if (!consumed && opt_find(&sc, opt, NULL, 0,
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                         AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)) {
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        // XXX we only support sws_flags, not arbitrary sws options
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        int ret = av_opt_set(sws_opts, opt, arg, 0);
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        if (ret < 0) {
            av_log(NULL, AV_LOG_ERROR, "Error setting option %s.\n", opt);
            return ret;
        }
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        consumed = 1;
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    }
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#endif
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#if CONFIG_SWRESAMPLE
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    swr_class = swr_get_class();
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    if (!consumed && (o=opt_find(&swr_class, opt, NULL, 0,
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                                    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);
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        if (ret < 0) {
            av_log(NULL, AV_LOG_ERROR, "Error setting option %s.\n", opt);
            return ret;
        }
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        av_dict_set(&swr_opts, opt, arg, FLAGS);
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        consumed = 1;
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    }
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#endif
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#if CONFIG_AVRESAMPLE
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    if ((o=opt_find(&rc, opt, NULL, 0,
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                       AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ))) {
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        av_dict_set(&resample_opts, opt, arg, FLAGS);
        consumed = 1;
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    }
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#endif
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    if (consumed)
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        return 0;
    return AVERROR_OPTION_NOT_FOUND;
}
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/*
 * Check whether given option is a group separator.
 *
 * @return index of the group definition that matched or -1 if none
 */
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static int match_group_separator(const OptionGroupDef *groups, int nb_groups,
                                 const char *opt)
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{
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    int i;
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    for (i = 0; i < nb_groups; i++) {
        const OptionGroupDef *p = &groups[i];
599
        if (p->sep && !strcmp(p->sep, opt))
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            return i;
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    }

    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;
#if CONFIG_SWSCALE
    g->sws_opts    = sws_opts;
#endif
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    g->swr_opts    = swr_opts;
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    g->codec_opts  = codec_opts;
    g->format_opts = format_opts;
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    g->resample_opts = resample_opts;
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    codec_opts  = NULL;
    format_opts = NULL;
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    resample_opts = NULL;
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#if CONFIG_SWSCALE
    sws_opts    = NULL;
#endif
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    swr_opts    = NULL;
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    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,
660
                               const OptionGroupDef *groups, int nb_groups)
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{
    static const OptionGroupDef global_group = { "global" };
    int i;

    memset(octx, 0, sizeof(*octx));

667
    octx->nb_groups = nb_groups;
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    octx->groups    = av_mallocz_array(octx->nb_groups, sizeof(*octx->groups));
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    if (!octx->groups)
670
        exit_program(1);
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    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);
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            av_dict_free(&l->groups[j].resample_opts);
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#if CONFIG_SWSCALE
            sws_freeContext(l->groups[j].sws_opts);
#endif
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            av_dict_free(&l->groups[j].swr_opts);
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        }
        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,
710
                      const OptionGroupDef *groups, int nb_groups)
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{
    int optindex = 1;
713
    int dashdash = -2;
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    /* perform system-dependent conversions for arguments list */
    prepare_app_arguments(&argc, &argv);

718
    init_parse_context(octx, groups, nb_groups);
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    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);

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        if (opt[0] == '-' && opt[1] == '-' && !opt[2]) {
            dashdash = optindex;
            continue;
        }
732
        /* unnamed group separators, e.g. output filename */
733
        if (opt[0] != '-' || !opt[1] || dashdash+1 == optindex) {
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            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 */
750
        if ((ret = match_group_separator(groups, nb_groups, opt)) >= 0) {
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            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;
    }

805
    if (octx->cur_group.nb_opts || codec_opts || format_opts || resample_opts)
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        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;
}

814 815
int opt_cpuflags(void *optctx, const char *opt, const char *arg)
{
816 817
    int ret;
    unsigned flags = av_get_cpu_flags();
818

819 820
    if ((ret = av_parse_cpu_caps(&flags, arg)) < 0)
        return ret;
821

822
    av_force_cpu_flags(flags);
823 824 825
    return 0;
}

826
int opt_loglevel(void *optctx, const char *opt, const char *arg)
827
{
828
    const struct { const char *name; int level; } log_levels[] = {
829 830 831 832 833 834 835 836 837 838 839
        { "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   },
    };
    char *tail;
    int level;
840
    int flags;
841 842
    int i;

843
    flags = av_log_get_flags();
844
    tail = strstr(arg, "repeat");
845 846 847 848 849 850
    if (tail)
        flags &= ~AV_LOG_SKIP_REPEATED;
    else
        flags |= AV_LOG_SKIP_REPEATED;

    av_log_set_flags(flags);
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    if (tail == arg)
        arg += 6 + (arg[6]=='+');
    if(tail && !*arg)
        return 0;

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    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) {
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        av_log(NULL, AV_LOG_FATAL, "Invalid loglevel \"%s\". "
               "Possible levels are numbers or:\n", arg);
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        for (i = 0; i < FF_ARRAY_ELEMS(log_levels); i++)
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            av_log(NULL, AV_LOG_FATAL, "\"%s\"\n", log_levels[i].name);
869
        exit_program(1);
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    }
    av_log_set_level(level);
    return 0;
}

875 876
static void expand_filename_template(AVBPrint *bp, const char *template,
                                     struct tm *tm)
877
{
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    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)
{
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    char *filename_template = NULL;
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    char *key, *val;
    int ret, count = 0;
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    time_t now;
    struct tm *tm;
910
    AVBPrint filename;
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    if (report_file) /* already opened */
        return 0;
    time(&now);
    tm = localtime(&now);
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    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;
        }
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        if (*env)
            env++;
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        count++;
        if (!strcmp(key, "file")) {
929
            av_free(filename_template);
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            filename_template = val;
            val = NULL;
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        } 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);
            }
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        } 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);
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    expand_filename_template(&filename,
                             av_x_if_null(filename_template, "%p-%t.log"), tm);
    av_free(filename_template);
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    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");
956 957
    if (!report_file) {
        av_log(NULL, AV_LOG_ERROR, "Failed to open report \"%s\": %s\n",
958
               filename.str, strerror(errno));
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        return AVERROR(errno);
    }
    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,
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           filename.str);
    av_bprint_finalize(&filename, NULL);
970 971 972
    return 0;
}

973 974 975 976 977
int opt_report(const char *opt)
{
    return init_report(NULL);
}

978
int opt_max_alloc(void *optctx, const char *opt, const char *arg)
979 980 981 982 983 984 985
{
    char *tail;
    size_t max;

    max = strtol(arg, &tail, 10);
    if (*tail) {
        av_log(NULL, AV_LOG_FATAL, "Invalid max_alloc \"%s\".\n", arg);
986
        exit_program(1);
987 988 989 990 991
    }
    av_max_alloc(max);
    return 0;
}

992
int opt_timelimit(void *optctx, const char *opt, const char *arg)
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{
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994
#if HAVE_SETRLIMIT
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    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
1000
    av_log(NULL, AV_LOG_WARNING, "-%s not implemented on this OS\n", opt);
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#endif
    return 0;
}

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1005 1006
void print_error(const char *filename, int err)
{
1007
    char errbuf[128];
1008
    const char *errbuf_ptr = errbuf;
1009

1010 1011
    if (av_strerror(err, errbuf, sizeof(errbuf)) < 0)
        errbuf_ptr = strerror(AVUNERROR(err));
1012
    av_log(NULL, AV_LOG_ERROR, "%s: %s\n", filename, errbuf_ptr);
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1013
}
1014

1015 1016
static int warned_cfg = 0;

1017 1018
#define INDENT        1
#define SHOW_VERSION  2
1019
#define SHOW_CONFIG   4
1020
#define SHOW_COPYRIGHT 8
1021

1022
#define PRINT_LIB_INFO(libname, LIBNAME, flags, level)                  \
1023
    if (CONFIG_##LIBNAME) {                                             \
1024
        const char *indent = flags & INDENT? "  " : "";                 \
1025
        if (flags & SHOW_VERSION) {                                     \
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1026
            unsigned int version = libname##_version();                 \
1027
            av_log(NULL, level,                                         \
1028
                   "%slib%-11s %2d.%3d.%3d / %2d.%3d.%3d\n",            \
1029 1030 1031 1032 1033
                   indent, #libname,                                    \
                   LIB##LIBNAME##_VERSION_MAJOR,                        \
                   LIB##LIBNAME##_VERSION_MINOR,                        \
                   LIB##LIBNAME##_VERSION_MICRO,                        \
                   version >> 16, version >> 8 & 0xff, version & 0xff); \
1034
        }                                                               \
1035 1036
        if (flags & SHOW_CONFIG) {                                      \
            const char *cfg = libname##_configuration();                \
1037
            if (strcmp(FFMPEG_CONFIGURATION, cfg)) {                    \
1038
                if (!warned_cfg) {                                      \
1039
                    av_log(NULL, level,                                 \
1040
                            "%sWARNING: library configuration mismatch\n", \
1041
                            indent);                                    \
1042 1043
                    warned_cfg = 1;                                     \
                }                                                       \
1044
                av_log(NULL, level, "%s%-11s configuration: %s\n",      \
1045
                        indent, #libname, cfg);                         \
1046 1047
            }                                                           \
        }                                                               \
1048
    }                                                                   \
1049

1050
static void print_all_libs_info(int flags, int level)
1051
{
1052 1053 1054 1055 1056
    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);
1057
    PRINT_LIB_INFO(avresample, AVRESAMPLE, flags, level);
1058
    PRINT_LIB_INFO(swscale,  SWSCALE,  flags, level);
1059
    PRINT_LIB_INFO(swresample,SWRESAMPLE,  flags, level);
1060
    PRINT_LIB_INFO(postproc, POSTPROC, flags, level);
1061 1062
}

1063 1064 1065 1066 1067 1068 1069
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",
1070
               program_birth_year, CONFIG_THIS_YEAR);
1071
    av_log(NULL, level, "\n");
1072 1073 1074
    av_log(NULL, level, "%sbuilt on %s %s with %s\n",
           indent, __DATE__, __TIME__, CC_IDENT);

1075 1076 1077
    av_log(NULL, level, "%sconfiguration: " FFMPEG_CONFIGURATION "\n", indent);
}

1078 1079
static void print_buildconf(int flags, int level)
{
1080
    const char *indent = flags & INDENT ? "  " : "";
1081 1082 1083 1084 1085
    char str[] = { FFMPEG_CONFIGURATION };
    char *conflist, *remove_tilde, *splitconf;

    // Change all the ' --' strings to '~--' so that
    // they can be identified as tokens.
1086
    while ((conflist = strstr(str, " --")) != NULL) {
1087 1088 1089 1090 1091
        strncpy(conflist, "~--", 3);
    }

    // Compensate for the weirdness this would cause
    // when passing 'pkg-config --static'.
1092 1093
    while ((remove_tilde = strstr(str, "pkg-config~")) != NULL) {
        strncpy(remove_tilde, "pkg-config ", 11);
1094 1095 1096
    }

    splitconf = strtok(str, "~");
1097
    av_log(NULL, level, "\n%sconfiguration:\n", indent);
1098
    while (splitconf != NULL) {
1099 1100 1101 1102 1103
        av_log(NULL, level, "%s%s%s\n", indent, indent, splitconf);
        splitconf = strtok(NULL, "~");
    }
}

1104
void show_banner(int argc, char **argv, const OptionDef *options)
1105
{
1106
    int idx = locate_option(argc, argv, options, "version");
1107
    if (hide_banner || idx)
1108 1109
        return;

1110
    print_program_info (INDENT|SHOW_COPYRIGHT, AV_LOG_INFO);
1111 1112
    print_all_libs_info(INDENT|SHOW_CONFIG,  AV_LOG_INFO);
    print_all_libs_info(INDENT|SHOW_VERSION, AV_LOG_INFO);
1113 1114
}

1115
int show_version(void *optctx, const char *opt, const char *arg)
1116
{
1117
    av_log_set_callback(log_callback_help);
1118
    print_program_info (SHOW_COPYRIGHT, AV_LOG_INFO);
1119
    print_all_libs_info(SHOW_VERSION, AV_LOG_INFO);
1120

1121
    return 0;
1122 1123
}

1124 1125 1126 1127 1128 1129 1130 1131
int show_buildconf(void *optctx, const char *opt, const char *arg)
{
    av_log_set_callback(log_callback_help);
    print_buildconf      (INDENT|0, AV_LOG_INFO);

    return 0;
}

1132
int show_license(void *optctx, const char *opt, const char *arg)
1133
{
1134
#if CONFIG_NONFREE
1135
    printf(
1136 1137
    "This version of %s has nonfree parts compiled in.\n"
    "Therefore it is not legally redistributable.\n",
1138
    program_name );
1139
#elif CONFIG_GPLV3
1140
    printf(
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    "%s 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 3 of the License, or\n"
    "(at your option) any later version.\n"
    "\n"
    "%s 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 %s.  If not, see <http://www.gnu.org/licenses/>.\n",
1153
    program_name, program_name, program_name );
1154
#elif CONFIG_GPL
1155
    printf(
1156
    "%s is free software; you can redistribute it and/or modify\n"
1157 1158 1159 1160
    "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"
1161
    "%s is distributed in the hope that it will be useful,\n"
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    "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"
1167 1168
    "along with %s; if not, write to the Free Software\n"
    "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n",
1169
    program_name, program_name, program_name );
1170
#elif CONFIG_LGPLV3
1171
    printf(
1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183
    "%s is free software; you can redistribute it and/or modify\n"
    "it under the terms of the GNU Lesser General Public License as published by\n"
    "the Free Software Foundation; either version 3 of the License, or\n"
    "(at your option) any later version.\n"
    "\n"
    "%s 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 Lesser General Public License for more details.\n"
    "\n"
    "You should have received a copy of the GNU Lesser General Public License\n"
    "along with %s.  If not, see <http://www.gnu.org/licenses/>.\n",
1184
    program_name, program_name, program_name );
1185
#else
1186
    printf(
1187
    "%s is free software; you can redistribute it and/or\n"
1188 1189 1190 1191
    "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"
1192
    "%s is distributed in the hope that it will be useful,\n"
1193 1194 1195 1196 1197
    "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"
1198 1199
    "License along with %s; if not, write to the Free Software\n"
    "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n",
1200
    program_name, program_name, program_name );
1201
#endif
1202

1203
    return 0;
1204
}
1205

1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218
static int is_device(const AVClass *avclass)
{
    if (!avclass)
        return 0;
    return avclass->category == AV_CLASS_CATEGORY_DEVICE_VIDEO_OUTPUT ||
           avclass->category == AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT ||
           avclass->category == AV_CLASS_CATEGORY_DEVICE_AUDIO_OUTPUT ||
           avclass->category == AV_CLASS_CATEGORY_DEVICE_AUDIO_INPUT ||
           avclass->category == AV_CLASS_CATEGORY_DEVICE_OUTPUT ||
           avclass->category == AV_CLASS_CATEGORY_DEVICE_INPUT;
}

static int show_formats_devices(void *optctx, const char *opt, const char *arg, int device_only)
1219
{
1220 1221
    AVInputFormat *ifmt  = NULL;
    AVOutputFormat *ofmt = NULL;
1222
    const char *last_name;
1223
    int is_dev;
1224

1225
    printf("%s\n"
1226 1227
           " D. = Demuxing supported\n"
           " .E = Muxing supported\n"
1228
           " --\n", device_only ? "Devices:" : "File formats:");
1229 1230 1231 1232 1233 1234 1235 1236
    last_name = "000";
    for (;;) {
        int decode = 0;
        int encode = 0;
        const char *name      = NULL;
        const char *long_name = NULL;

        while ((ofmt = av_oformat_next(ofmt))) {
1237 1238 1239
            is_dev = is_device(ofmt->priv_class);
            if (!is_dev && device_only)
                continue;
1240 1241 1242 1243 1244
            if ((name == NULL || strcmp(ofmt->name, name) < 0) &&
                strcmp(ofmt->name, last_name) > 0) {
                name      = ofmt->name;
                long_name = ofmt->long_name;
                encode    = 1;
1245 1246
            }
        }
1247
        while ((ifmt = av_iformat_next(ifmt))) {
1248 1249 1250
            is_dev = is_device(ifmt->priv_class);
            if (!is_dev && device_only)
                continue;
1251 1252 1253 1254 1255
            if ((name == NULL || strcmp(ifmt->name, name) < 0) &&
                strcmp(ifmt->name, last_name) > 0) {
                name      = ifmt->name;
                long_name = ifmt->long_name;
                encode    = 0;
1256
            }
1257 1258
            if (name && strcmp(ifmt->name, name) == 0)
                decode = 1;
1259
        }
1260
        if (name == NULL)
1261
            break;
1262
        last_name = name;
1263

1264 1265 1266 1267
        printf(" %s%s %-15s %s\n",
               decode ? "D" : " ",
               encode ? "E" : " ",
               name,
1268 1269
            long_name ? long_name:" ");
    }
1270
    return 0;
1271
}
1272

1273 1274 1275 1276 1277 1278 1279 1280 1281 1282
int show_formats(void *optctx, const char *opt, const char *arg)
{
    return show_formats_devices(optctx, opt, arg, 0);
}

int show_devices(void *optctx, const char *opt, const char *arg)
{
    return show_formats_devices(optctx, opt, arg, 1);
}

1283 1284
#define PRINT_CODEC_SUPPORTED(codec, field, type, list_name, term, get_name) \
    if (codec->field) {                                                      \
1285
        const type *p = codec->field;                                        \
1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302
                                                                             \
        printf("    Supported " list_name ":");                              \
        while (*p != term) {                                                 \
            get_name(*p);                                                    \
            printf(" %s", name);                                             \
            p++;                                                             \
        }                                                                    \
        printf("\n");                                                        \
    }                                                                        \

static void print_codec(const AVCodec *c)
{
    int encoder = av_codec_is_encoder(c);

    printf("%s %s [%s]:\n", encoder ? "Encoder" : "Decoder", c->name,
           c->long_name ? c->long_name : "");

1303 1304
    if (c->type == AVMEDIA_TYPE_VIDEO ||
        c->type == AVMEDIA_TYPE_AUDIO) {
1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326
        printf("    Threading capabilities: ");
        switch (c->capabilities & (CODEC_CAP_FRAME_THREADS |
                                   CODEC_CAP_SLICE_THREADS)) {
        case CODEC_CAP_FRAME_THREADS |
             CODEC_CAP_SLICE_THREADS: printf("frame and slice"); break;
        case CODEC_CAP_FRAME_THREADS: printf("frame");           break;
        case CODEC_CAP_SLICE_THREADS: printf("slice");           break;
        default:                      printf("no");              break;
        }
        printf("\n");
    }

    if (c->supported_framerates) {
        const AVRational *fps = c->supported_framerates;

        printf("    Supported framerates:");
        while (fps->num) {
            printf(" %d/%d", fps->num, fps->den);
            fps++;
        }
        printf("\n");
    }
1327 1328
    PRINT_CODEC_SUPPORTED(c, pix_fmts, enum AVPixelFormat, "pixel formats",
                          AV_PIX_FMT_NONE, GET_PIX_FMT_NAME);
1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342
    PRINT_CODEC_SUPPORTED(c, supported_samplerates, int, "sample rates", 0,
                          GET_SAMPLE_RATE_NAME);
    PRINT_CODEC_SUPPORTED(c, sample_fmts, enum AVSampleFormat, "sample formats",
                          AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME);
    PRINT_CODEC_SUPPORTED(c, channel_layouts, uint64_t, "channel layouts",
                          0, GET_CH_LAYOUT_DESC);

    if (c->priv_class) {
        show_help_children(c->priv_class,
                           AV_OPT_FLAG_ENCODING_PARAM |
                           AV_OPT_FLAG_DECODING_PARAM);
    }
}

1343 1344
static char get_media_type_char(enum AVMediaType type)
{
1345 1346 1347
    switch (type) {
        case AVMEDIA_TYPE_VIDEO:    return 'V';
        case AVMEDIA_TYPE_AUDIO:    return 'A';
1348
        case AVMEDIA_TYPE_DATA:     return 'D';
1349
        case AVMEDIA_TYPE_SUBTITLE: return 'S';
1350
        case AVMEDIA_TYPE_ATTACHMENT:return 'T';
1351 1352
        default:                    return '?';
    }
1353 1354
}

1355 1356
static const AVCodec *next_codec_for_id(enum AVCodecID id, const AVCodec *prev,
                                        int encoder)
1357
{
1358 1359 1360 1361 1362 1363 1364 1365
    while ((prev = av_codec_next(prev))) {
        if (prev->id == id &&
            (encoder ? av_codec_is_encoder(prev) : av_codec_is_decoder(prev)))
            return prev;
    }
    return NULL;
}

1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383
static int compare_codec_desc(const void *a, const void *b)
{
    const AVCodecDescriptor * const *da = a;
    const AVCodecDescriptor * const *db = b;

    return (*da)->type != (*db)->type ? (*da)->type - (*db)->type :
           strcmp((*da)->name, (*db)->name);
}

static unsigned get_codecs_sorted(const AVCodecDescriptor ***rcodecs)
{
    const AVCodecDescriptor *desc = NULL;
    const AVCodecDescriptor **codecs;
    unsigned nb_codecs = 0, i = 0;

    while ((desc = avcodec_descriptor_next(desc)))
        nb_codecs++;
    if (!(codecs = av_calloc(nb_codecs, sizeof(*codecs)))) {
1384
        av_log(NULL, AV_LOG_ERROR, "Out of memory\n");
1385
        exit_program(1);
1386 1387 1388 1389 1390 1391 1392 1393 1394 1395
    }
    desc = NULL;
    while ((desc = avcodec_descriptor_next(desc)))
        codecs[i++] = desc;
    av_assert0(i == nb_codecs);
    qsort(codecs, nb_codecs, sizeof(*codecs), compare_codec_desc);
    *rcodecs = codecs;
    return nb_codecs;
}

1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407
static void print_codecs_for_id(enum AVCodecID id, int encoder)
{
    const AVCodec *codec = NULL;

    printf(" (%s: ", encoder ? "encoders" : "decoders");

    while ((codec = next_codec_for_id(id, codec, encoder)))
        printf("%s ", codec->name);

    printf(")");
}

1408
int show_codecs(void *optctx, const char *opt, const char *arg)
1409
{
1410 1411
    const AVCodecDescriptor **codecs;
    unsigned i, nb_codecs = get_codecs_sorted(&codecs);
1412

1413
    printf("Codecs:\n"
1414 1415 1416 1417 1418 1419 1420 1421 1422
           " D..... = Decoding supported\n"
           " .E.... = Encoding supported\n"
           " ..V... = Video codec\n"
           " ..A... = Audio codec\n"
           " ..S... = Subtitle codec\n"
           " ...I.. = Intra frame-only codec\n"
           " ....L. = Lossy compression\n"
           " .....S = Lossless compression\n"
           " -------\n");
1423 1424
    for (i = 0; i < nb_codecs; i++) {
        const AVCodecDescriptor *desc = codecs[i];
1425 1426
        const AVCodec *codec = NULL;

1427 1428 1429
        if (strstr(desc->name, "_deprecated"))
            continue;

1430
        printf(" ");
1431 1432 1433 1434 1435
        printf(avcodec_find_decoder(desc->id) ? "D" : ".");
        printf(avcodec_find_encoder(desc->id) ? "E" : ".");

        printf("%c", get_media_type_char(desc->type));
        printf((desc->props & AV_CODEC_PROP_INTRA_ONLY) ? "I" : ".");
1436 1437
        printf((desc->props & AV_CODEC_PROP_LOSSY)      ? "L" : ".");
        printf((desc->props & AV_CODEC_PROP_LOSSLESS)   ? "S" : ".");
1438 1439 1440 1441 1442 1443 1444 1445 1446

        printf(" %-20s %s", desc->name, desc->long_name ? desc->long_name : "");

        /* print decoders/encoders when there's more than one or their
         * names are different from codec name */
        while ((codec = next_codec_for_id(desc->id, codec, 0))) {
            if (strcmp(codec->name, desc->name)) {
                print_codecs_for_id(desc->id, 0);
                break;
1447
            }
1448 1449 1450 1451 1452 1453
        }
        codec = NULL;
        while ((codec = next_codec_for_id(desc->id, codec, 1))) {
            if (strcmp(codec->name, desc->name)) {
                print_codecs_for_id(desc->id, 1);
                break;
1454 1455 1456 1457 1458
            }
        }

        printf("\n");
    }
1459
    av_free(codecs);
1460
    return 0;
1461 1462 1463 1464
}

static void print_codecs(int encoder)
{
1465 1466
    const AVCodecDescriptor **codecs;
    unsigned i, nb_codecs = get_codecs_sorted(&codecs);
1467 1468

    printf("%s:\n"
1469 1470 1471 1472 1473 1474 1475 1476 1477
           " V..... = Video\n"
           " A..... = Audio\n"
           " S..... = Subtitle\n"
           " .F.... = Frame-level multithreading\n"
           " ..S... = Slice-level multithreading\n"
           " ...X.. = Codec is experimental\n"
           " ....B. = Supports draw_horiz_band\n"
           " .....D = Supports direct rendering method 1\n"
           " ------\n",
1478
           encoder ? "Encoders" : "Decoders");
1479 1480
    for (i = 0; i < nb_codecs; i++) {
        const AVCodecDescriptor *desc = codecs[i];
1481 1482 1483
        const AVCodec *codec = NULL;

        while ((codec = next_codec_for_id(desc->id, codec, encoder))) {
1484
            printf(" %c", get_media_type_char(desc->type));
1485 1486 1487
            printf((codec->capabilities & CODEC_CAP_FRAME_THREADS) ? "F" : ".");
            printf((codec->capabilities & CODEC_CAP_SLICE_THREADS) ? "S" : ".");
            printf((codec->capabilities & CODEC_CAP_EXPERIMENTAL)  ? "X" : ".");
1488 1489
            printf((codec->capabilities & CODEC_CAP_DRAW_HORIZ_BAND)?"B" : ".");
            printf((codec->capabilities & CODEC_CAP_DR1)           ? "D" : ".");
1490 1491 1492 1493 1494 1495 1496 1497

            printf(" %-20s %s", codec->name, codec->long_name ? codec->long_name : "");
            if (strcmp(codec->name, desc->name))
                printf(" (codec %s)", desc->name);

            printf("\n");
        }
    }
1498
    av_free(codecs);
1499 1500
}

1501
int show_decoders(void *optctx, const char *opt, const char *arg)
1502 1503 1504 1505 1506
{
    print_codecs(0);
    return 0;
}

1507
int show_encoders(void *optctx, const char *opt, const char *arg)
1508 1509
{
    print_codecs(1);
1510
    return 0;
1511 1512
}

1513
int show_bsfs(void *optctx, const char *opt, const char *arg)
1514
{
1515
    AVBitStreamFilter *bsf = NULL;
1516 1517

    printf("Bitstream filters:\n");
1518
    while ((bsf = av_bitstream_filter_next(bsf)))
1519
        printf("%s\n", bsf->name);
1520
    printf("\n");
1521
    return 0;
1522 1523
}

1524
int show_protocols(void *optctx, const char *opt, const char *arg)
1525
{
1526 1527
    void *opaque = NULL;
    const char *name;
1528

1529
    printf("Supported file protocols:\n"
1530 1531 1532 1533 1534 1535
           "Input:\n");
    while ((name = avio_enum_protocols(&opaque, 0)))
        printf("%s\n", name);
    printf("Output:\n");
    while ((name = avio_enum_protocols(&opaque, 1)))
        printf("%s\n", name);
1536
    return 0;
1537
}
1538

1539
int show_filters(void *optctx, const char *opt, const char *arg)
1540
{
1541
    const AVFilter av_unused(*filter) = NULL;
1542 1543 1544
    char descr[64], *descr_cur;
    int i, j;
    const AVFilterPad *pad;
1545

1546
    printf("Filters:\n"
1547 1548 1549
           "  T.. = Timeline support\n"
           "  .S. = Slice threading\n"
           "  ..C = Commmand support\n"
1550 1551 1552 1553
           "  A = Audio input/output\n"
           "  V = Video input/output\n"
           "  N = Dynamic number and/or type of input/output\n"
           "  | = Source or sink filter\n");
1554
#if CONFIG_AVFILTER
1555
    while ((filter = avfilter_next(filter))) {
1556 1557 1558 1559 1560 1561
        descr_cur = descr;
        for (i = 0; i < 2; i++) {
            if (i) {
                *(descr_cur++) = '-';
                *(descr_cur++) = '>';
            }
1562
            pad = i ? filter->outputs : filter->inputs;
1563
            for (j = 0; pad && pad[j].name; j++) {
1564 1565 1566 1567 1568
                if (descr_cur >= descr + sizeof(descr) - 4)
                    break;
                *(descr_cur++) = get_media_type_char(pad[j].type);
            }
            if (!j)
1569 1570
                *(descr_cur++) = ((!i && (filter->flags & AVFILTER_FLAG_DYNAMIC_INPUTS)) ||
                                  ( i && (filter->flags & AVFILTER_FLAG_DYNAMIC_OUTPUTS))) ? 'N' : '|';
1571 1572
        }
        *descr_cur = 0;
1573
        printf(" %c%c%c %-16s %-10s %s\n",
1574 1575
               filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE ? 'T' : '.',
               filter->flags & AVFILTER_FLAG_SLICE_THREADS    ? 'S' : '.',
1576
               filter->process_command                        ? 'C' : '.',
1577
               filter->name, descr, filter->description);
1578
    }
1579
#endif
1580
    return 0;
1581 1582
}

1583
int show_colors(void *optctx, const char *opt, const char *arg)
1584 1585 1586 1587 1588 1589 1590 1591 1592
{
    const char *name;
    const uint8_t *rgb;
    int i;

    printf("%-32s #RRGGBB\n", "name");

    for (i = 0; name = av_get_known_color_name(i, &rgb); i++)
        printf("%-32s #%02x%02x%02x\n", name, rgb[0], rgb[1], rgb[2]);
1593 1594

    return 0;
1595 1596
}

1597
int show_pix_fmts(void *optctx, const char *opt, const char *arg)
1598
{
1599
    const AVPixFmtDescriptor *pix_desc = NULL;
1600

1601 1602 1603 1604 1605 1606 1607 1608
    printf("Pixel formats:\n"
           "I.... = Supported Input  format for conversion\n"
           ".O... = Supported Output format for conversion\n"
           "..H.. = Hardware accelerated format\n"
           "...P. = Paletted format\n"
           "....B = Bitstream format\n"
           "FLAGS NAME            NB_COMPONENTS BITS_PER_PIXEL\n"
           "-----\n");
1609

1610 1611 1612 1613 1614
#if !CONFIG_SWSCALE
#   define sws_isSupportedInput(x)  0
#   define sws_isSupportedOutput(x) 0
#endif

1615 1616
    while ((pix_desc = av_pix_fmt_desc_next(pix_desc))) {
        enum AVPixelFormat pix_fmt = av_pix_fmt_desc_get_id(pix_desc);
1617
        printf("%c%c%c%c%c %-16s       %d            %2d\n",
1618 1619 1620 1621 1622
               sws_isSupportedInput (pix_fmt)              ? 'I' : '.',
               sws_isSupportedOutput(pix_fmt)              ? 'O' : '.',
               pix_desc->flags & AV_PIX_FMT_FLAG_HWACCEL   ? 'H' : '.',
               pix_desc->flags & AV_PIX_FMT_FLAG_PAL       ? 'P' : '.',
               pix_desc->flags & AV_PIX_FMT_FLAG_BITSTREAM ? 'B' : '.',
1623 1624 1625 1626
               pix_desc->name,
               pix_desc->nb_components,
               av_get_bits_per_pixel(pix_desc));
    }
1627
    return 0;
1628 1629
}

1630
int show_layouts(void *optctx, const char *opt, const char *arg)
1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658
{
    int i = 0;
    uint64_t layout, j;
    const char *name, *descr;

    printf("Individual channels:\n"
           "NAME        DESCRIPTION\n");
    for (i = 0; i < 63; i++) {
        name = av_get_channel_name((uint64_t)1 << i);
        if (!name)
            continue;
        descr = av_get_channel_description((uint64_t)1 << i);
        printf("%-12s%s\n", name, descr);
    }
    printf("\nStandard channel layouts:\n"
           "NAME        DECOMPOSITION\n");
    for (i = 0; !av_get_standard_channel_layout(i, &layout, &name); i++) {
        if (name) {
            printf("%-12s", name);
            for (j = 1; j; j <<= 1)
                if ((layout & j))
                    printf("%s%s", (layout & (j - 1)) ? "+" : "", av_get_channel_name(j));
            printf("\n");
        }
    }
    return 0;
}

1659
int show_sample_fmts(void *optctx, const char *opt, const char *arg)
1660 1661 1662 1663 1664 1665 1666 1667
{
    int i;
    char fmt_str[128];
    for (i = -1; i < AV_SAMPLE_FMT_NB; i++)
        printf("%s\n", av_get_sample_fmt_string(fmt_str, sizeof(fmt_str), i));
    return 0;
}

1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691
static void show_help_codec(const char *name, int encoder)
{
    const AVCodecDescriptor *desc;
    const AVCodec *codec;

    if (!name) {
        av_log(NULL, AV_LOG_ERROR, "No codec name specified.\n");
        return;
    }

    codec = encoder ? avcodec_find_encoder_by_name(name) :
                      avcodec_find_decoder_by_name(name);

    if (codec)
        print_codec(codec);
    else if ((desc = avcodec_descriptor_get_by_name(name))) {
        int printed = 0;

        while ((codec = next_codec_for_id(desc->id, codec, encoder))) {
            printed = 1;
            print_codec(codec);
        }

        if (!printed) {
1692 1693
            av_log(NULL, AV_LOG_ERROR, "Codec '%s' is known to FFmpeg, "
                   "but no %s for it are available. FFmpeg might need to be "
1694 1695 1696 1697
                   "recompiled with additional external libraries.\n",
                   name, encoder ? "encoders" : "decoders");
        }
    } else {
1698
        av_log(NULL, AV_LOG_ERROR, "Codec '%s' is not recognized by FFmpeg.\n",
1699 1700 1701 1702
               name);
    }
}

1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753
static void show_help_demuxer(const char *name)
{
    const AVInputFormat *fmt = av_find_input_format(name);

    if (!fmt) {
        av_log(NULL, AV_LOG_ERROR, "Unknown format '%s'.\n", name);
        return;
    }

    printf("Demuxer %s [%s]:\n", fmt->name, fmt->long_name);

    if (fmt->extensions)
        printf("    Common extensions: %s.\n", fmt->extensions);

    if (fmt->priv_class)
        show_help_children(fmt->priv_class, AV_OPT_FLAG_DECODING_PARAM);
}

static void show_help_muxer(const char *name)
{
    const AVCodecDescriptor *desc;
    const AVOutputFormat *fmt = av_guess_format(name, NULL, NULL);

    if (!fmt) {
        av_log(NULL, AV_LOG_ERROR, "Unknown format '%s'.\n", name);
        return;
    }

    printf("Muxer %s [%s]:\n", fmt->name, fmt->long_name);

    if (fmt->extensions)
        printf("    Common extensions: %s.\n", fmt->extensions);
    if (fmt->mime_type)
        printf("    Mime type: %s.\n", fmt->mime_type);
    if (fmt->video_codec != AV_CODEC_ID_NONE &&
        (desc = avcodec_descriptor_get(fmt->video_codec))) {
        printf("    Default video codec: %s.\n", desc->name);
    }
    if (fmt->audio_codec != AV_CODEC_ID_NONE &&
        (desc = avcodec_descriptor_get(fmt->audio_codec))) {
        printf("    Default audio codec: %s.\n", desc->name);
    }
    if (fmt->subtitle_codec != AV_CODEC_ID_NONE &&
        (desc = avcodec_descriptor_get(fmt->subtitle_codec))) {
        printf("    Default subtitle codec: %s.\n", desc->name);
    }

    if (fmt->priv_class)
        show_help_children(fmt->priv_class, AV_OPT_FLAG_ENCODING_PARAM);
}

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#if CONFIG_AVFILTER
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static void show_help_filter(const char *name)
{
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#if CONFIG_AVFILTER
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    const AVFilter *f = avfilter_get_by_name(name);
    int i, count;
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    if (!name) {
        av_log(NULL, AV_LOG_ERROR, "No filter name specified.\n");
        return;
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    } else if (!f) {
        av_log(NULL, AV_LOG_ERROR, "Unknown filter '%s'.\n", name);
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        return;
    }
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    printf("Filter %s\n", f->name);
    if (f->description)
        printf("  %s\n", f->description);
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    if (f->flags & AVFILTER_FLAG_SLICE_THREADS)
        printf("    slice threading supported\n");
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    printf("    Inputs:\n");
    count = avfilter_pad_count(f->inputs);
    for (i = 0; i < count; i++) {
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        printf("       #%d: %s (%s)\n", i, avfilter_pad_get_name(f->inputs, i),
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               media_type_string(avfilter_pad_get_type(f->inputs, i)));
    }
    if (f->flags & AVFILTER_FLAG_DYNAMIC_INPUTS)
        printf("        dynamic (depending on the options)\n");
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    else if (!count)
        printf("        none (source filter)\n");
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    printf("    Outputs:\n");
    count = avfilter_pad_count(f->outputs);
    for (i = 0; i < count; i++) {
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        printf("       #%d: %s (%s)\n", i, avfilter_pad_get_name(f->outputs, i),
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               media_type_string(avfilter_pad_get_type(f->outputs, i)));
    }
    if (f->flags & AVFILTER_FLAG_DYNAMIC_OUTPUTS)
        printf("        dynamic (depending on the options)\n");
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    else if (!count)
        printf("        none (sink filter)\n");
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    if (f->priv_class)
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        show_help_children(f->priv_class, AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM |
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                                          AV_OPT_FLAG_AUDIO_PARAM);
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    if (f->flags & AVFILTER_FLAG_SUPPORT_TIMELINE)
        printf("This filter has support for timeline through the 'enable' option.\n");
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#else
    av_log(NULL, AV_LOG_ERROR, "Build without libavfilter; "
           "can not to satisfy request\n");
#endif
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}
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#endif
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int show_help(void *optctx, const char *opt, const char *arg)
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{
    char *topic, *par;
    av_log_set_callback(log_callback_help);

    topic = av_strdup(arg ? arg : "");
    par = strchr(topic, '=');
    if (par)
        *par++ = 0;

    if (!*topic) {
        show_help_default(topic, par);
    } else if (!strcmp(topic, "decoder")) {
        show_help_codec(par, 0);
    } else if (!strcmp(topic, "encoder")) {
        show_help_codec(par, 1);
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    } else if (!strcmp(topic, "demuxer")) {
        show_help_demuxer(par);
    } else if (!strcmp(topic, "muxer")) {
        show_help_muxer(par);
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#if CONFIG_AVFILTER
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    } else if (!strcmp(topic, "filter")) {
        show_help_filter(par);
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#endif
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    } else {
        show_help_default(topic, par);
    }

    av_freep(&topic);
    return 0;
}

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int read_yesno(void)
{
    int c = getchar();
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    int yesno = (av_toupper(c) == 'Y');
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    while (c != '\n' && c != EOF)
        c = getchar();

    return yesno;
}
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int cmdutils_read_file(const char *filename, char **bufptr, size_t *size)
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{
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    int ret;
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    FILE *f = av_fopen_utf8(filename, "rb");
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    if (!f) {
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        av_log(NULL, AV_LOG_ERROR, "Cannot read file '%s': %s\n", filename,
               strerror(errno));
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        return AVERROR(errno);
    }
    fseek(f, 0, SEEK_END);
    *size = ftell(f);
    fseek(f, 0, SEEK_SET);
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    if (*size == (size_t)-1) {
        av_log(NULL, AV_LOG_ERROR, "IO error: %s\n", strerror(errno));
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        fclose(f);
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        return AVERROR(errno);
    }
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    *bufptr = av_malloc(*size + 1);
    if (!*bufptr) {
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        av_log(NULL, AV_LOG_ERROR, "Could not allocate file buffer\n");
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        fclose(f);
        return AVERROR(ENOMEM);
    }
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    ret = fread(*bufptr, 1, *size, f);
    if (ret < *size) {
        av_free(*bufptr);
        if (ferror(f)) {
            av_log(NULL, AV_LOG_ERROR, "Error while reading file '%s': %s\n",
                   filename, strerror(errno));
            ret = AVERROR(errno);
        } else
            ret = AVERROR_EOF;
    } else {
        ret = 0;
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        (*bufptr)[(*size)++] = '\0';
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    }
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    fclose(f);
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    return ret;
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}
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FILE *get_preset_file(char *filename, size_t filename_size,
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                      const char *preset_name, int is_path,
                      const char *codec_name)
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{
    FILE *f = NULL;
    int i;
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    const char *base[3] = { getenv("FFMPEG_DATADIR"),
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                            getenv("HOME"),
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                            FFMPEG_DATADIR, };
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    if (is_path) {
        av_strlcpy(filename, preset_name, filename_size);
        f = fopen(filename, "r");
    } else {
Gianluigi Tiesi's avatar
Gianluigi Tiesi committed
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#ifdef _WIN32
        char datadir[MAX_PATH], *ls;
        base[2] = NULL;

        if (GetModuleFileNameA(GetModuleHandleA(NULL), datadir, sizeof(datadir) - 1))
        {
            for (ls = datadir; ls < datadir + strlen(datadir); ls++)
                if (*ls == '\\') *ls = '/';

            if (ls = strrchr(datadir, '/'))
            {
                *ls = 0;
                strncat(datadir, "/ffpresets",  sizeof(datadir) - 1 - strlen(datadir));
                base[2] = datadir;
            }
        }
#endif
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        for (i = 0; i < 3 && !f; i++) {
            if (!base[i])
                continue;
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            snprintf(filename, filename_size, "%s%s/%s.ffpreset", base[i],
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                     i != 1 ? "" : "/.ffmpeg", preset_name);
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            f = fopen(filename, "r");
            if (!f && codec_name) {
                snprintf(filename, filename_size,
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                         "%s%s/%s-%s.ffpreset",
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                         base[i], i != 1 ? "" : "/.ffmpeg", codec_name,
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                         preset_name);
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                f = fopen(filename, "r");
            }
        }
    }

    return f;
}

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int check_stream_specifier(AVFormatContext *s, AVStream *st, const char *spec)
{
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    int ret = avformat_match_stream_specifier(s, st, spec);
    if (ret < 0)
        av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec);
    return ret;
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}

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AVDictionary *filter_codec_opts(AVDictionary *opts, enum AVCodecID codec_id,
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                                AVFormatContext *s, AVStream *st, AVCodec *codec)
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{
    AVDictionary    *ret = NULL;
    AVDictionaryEntry *t = NULL;
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    int            flags = s->oformat ? AV_OPT_FLAG_ENCODING_PARAM
                                      : AV_OPT_FLAG_DECODING_PARAM;
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    char          prefix = 0;
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    const AVClass    *cc = avcodec_get_class();
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    if (!codec)
        codec            = s->oformat ? avcodec_find_encoder(codec_id)
                                      : avcodec_find_decoder(codec_id);
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1967
    switch (st->codec->codec_type) {
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    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;
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    }

    while (t = av_dict_get(opts, "", t, AV_DICT_IGNORE_SUFFIX)) {
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        char *p = strchr(t->key, ':');

        /* check stream specification in opt name */
        if (p)
            switch (check_stream_specifier(s, st, p + 1)) {
            case  1: *p = 0; break;
            case  0:         continue;
            default:         return NULL;
            }

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        if (av_opt_find(&cc, t->key, NULL, flags, AV_OPT_SEARCH_FAKE_OBJ) ||
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            !codec ||
            (codec->priv_class &&
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             av_opt_find(&codec->priv_class, t->key, NULL, flags,
                         AV_OPT_SEARCH_FAKE_OBJ)))
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            av_dict_set(&ret, t->key, t->value, 0);
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        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);
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        if (p)
            *p = ':';
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    }
    return ret;
}

2010 2011
AVDictionary **setup_find_stream_info_opts(AVFormatContext *s,
                                           AVDictionary *codec_opts)
2012 2013 2014 2015 2016 2017
{
    int i;
    AVDictionary **opts;

    if (!s->nb_streams)
        return NULL;
2018
    opts = av_mallocz_array(s->nb_streams, sizeof(*opts));
2019
    if (!opts) {
2020 2021
        av_log(NULL, AV_LOG_ERROR,
               "Could not alloc memory for stream options.\n");
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        return NULL;
    }
    for (i = 0; i < s->nb_streams; i++)
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        opts[i] = filter_codec_opts(codec_opts, s->streams[i]->codec->codec_id,
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                                    s, s->streams[i], NULL);
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    return opts;
}

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void *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");
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        exit_program(1);
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    }
    if (*size < new_size) {
        uint8_t *tmp = av_realloc(array, new_size*elem_size);
        if (!tmp) {
            av_log(NULL, AV_LOG_ERROR, "Could not alloc buffer.\n");
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            exit_program(1);
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        }
        memset(tmp + *size*elem_size, 0, (new_size-*size) * elem_size);
        *size = new_size;
        return tmp;
    }
    return array;
}