cmdutils.c 74.9 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/attributes.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/display.h"
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#include "libavutil/mathematics.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/libm.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 "libavutil/version.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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#ifdef _WIN32
#include <windows.h>
#endif
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static int init_report(const char *env);

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AVDictionary *sws_dict;
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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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enum show_muxdemuxers {
    SHOW_DEFAULT,
    SHOW_DEMUXERS,
    SHOW_MUXERS,
};

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void init_opts(void)
{
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    av_dict_set(&sws_dict, "flags", "bicubic", 0);
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}

void uninit_opts(void)
{
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    av_dict_free(&swr_opts);
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    av_dict_free(&sws_dict);
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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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void init_dynload(void)
{
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#if HAVE_SETDLLDIRECTORY && defined(_WIN32)
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    /* Calling SetDllDirectory with the empty string (but not NULL) removes the
     * current working directory from the DLL search path as a security pre-caution. */
    SetDllDirectory("");
#endif
}

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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; po++) {
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        char buf[128];
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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) {
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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 <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) {
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        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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        char *str;
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        dstcount = (int *)(so + 1);
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        *so = grow_array(*so, sizeof(**so), dstcount, *dstcount + 1);
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        str = av_strdup(p ? p + 1 : "");
        if (!str)
            return AVERROR(ENOMEM);
        (*so)[*dstcount - 1].specifier = str;
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        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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        if (!str)
            return AVERROR(ENOMEM);
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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->name || 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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static void check_options(const OptionDef *po)
{
    while (po->name) {
        if (po->flags & OPT_PERFILE)
            av_assert0(po->flags & (OPT_INPUT | OPT_OUTPUT));
        po++;
    }
}

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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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    check_options(options);

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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 && (arg[0]=='-' || arg[0]=='+')) ? 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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#if CONFIG_SWSCALE
    const AVClass *sc = sws_get_class();
#endif
#if CONFIG_SWRESAMPLE
    const AVClass *swr_class = swr_get_class();
#endif
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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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    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);
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        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);
        }
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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(&sws_dict, opt, arg, FLAGS);

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        consumed = 1;
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    }
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#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;
    }
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#endif
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#if CONFIG_SWRESAMPLE
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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);
621
        consumed = 1;
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    }
623
#endif
624
#if CONFIG_AVRESAMPLE
625
    if ((o=opt_find(&rc, opt, NULL, 0,
626
                       AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ))) {
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        av_dict_set(&resample_opts, opt, arg, FLAGS);
        consumed = 1;
629
    }
630
#endif
631

632
    if (consumed)
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        return 0;
    return AVERROR_OPTION_NOT_FOUND;
}
636

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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)
644
{
645
    int i;
646

647 648
    for (i = 0; i < nb_groups; i++) {
        const OptionGroupDef *p = &groups[i];
649
        if (p->sep && !strcmp(p->sep, opt))
650
            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;
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    g->sws_dict    = sws_dict;
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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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    sws_dict    = NULL;
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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,
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                               const OptionGroupDef *groups, int nb_groups)
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{
    static const OptionGroupDef global_group = { "global" };
    int i;

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

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    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)
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        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);
738
            av_dict_free(&l->groups[j].resample_opts);
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            av_dict_free(&l->groups[j].sws_dict);
741
            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,
755
                      const OptionGroupDef *groups, int nb_groups)
756 757
{
    int optindex = 1;
758
    int dashdash = -2;
759 760 761 762

    /* perform system-dependent conversions for arguments list */
    prepare_app_arguments(&argc, &argv);

763
    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;
        }
777
        /* unnamed group separators, e.g. output filename */
778
        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 */
795
        if ((ret = match_group_separator(groups, nb_groups, opt)) >= 0) {
796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849
            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;
    }

850
    if (octx->cur_group.nb_opts || codec_opts || format_opts || resample_opts)
851 852
        av_log(NULL, AV_LOG_WARNING, "Trailing option(s) found in the "
               "command: may be ignored.\n");
853 854 855 856 857 858

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

    return 0;
}

859 860
int opt_cpuflags(void *optctx, const char *opt, const char *arg)
{
861 862
    int ret;
    unsigned flags = av_get_cpu_flags();
863

864 865
    if ((ret = av_parse_cpu_caps(&flags, arg)) < 0)
        return ret;
866

867
    av_force_cpu_flags(flags);
868 869 870
    return 0;
}

871
int opt_loglevel(void *optctx, const char *opt, const char *arg)
872
{
873
    const struct { const char *name; int level; } log_levels[] = {
874 875 876 877 878 879 880 881
        { "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   },
882
        { "trace"  , AV_LOG_TRACE   },
883
    };
884
    const char *token;
885
    char *tail;
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    int flags = av_log_get_flags();
    int level = av_log_get_level();
    int cmd, i = 0;

    av_assert0(arg);
    while (*arg) {
        token = arg;
        if (*token == '+' || *token == '-') {
            cmd = *token++;
        } else {
            cmd = 0;
        }
        if (!i && !cmd) {
            flags = 0;  /* missing relative prefix, build absolute value */
        }
        if (!strncmp(token, "repeat", 6)) {
            if (cmd == '-') {
                flags |= AV_LOG_SKIP_REPEATED;
            } else {
                flags &= ~AV_LOG_SKIP_REPEATED;
            }
            arg = token + 6;
        } else if (!strncmp(token, "level", 5)) {
            if (cmd == '-') {
                flags &= ~AV_LOG_PRINT_LEVEL;
            } else {
                flags |= AV_LOG_PRINT_LEVEL;
            }
            arg = token + 5;
        } else {
            break;
        }
        i++;
    }
    if (!*arg) {
        goto end;
    } else if (*arg == '+') {
        arg++;
    } else if (!i) {
        flags = av_log_get_flags();  /* level value without prefix, reset flags */
    }
927

928 929
    for (i = 0; i < FF_ARRAY_ELEMS(log_levels); i++) {
        if (!strcmp(log_levels[i].name, arg)) {
930 931
            level = log_levels[i].level;
            goto end;
932 933 934 935 936
        }
    }

    level = strtol(arg, &tail, 10);
    if (*tail) {
937 938
        av_log(NULL, AV_LOG_FATAL, "Invalid loglevel \"%s\". "
               "Possible levels are numbers or:\n", arg);
939
        for (i = 0; i < FF_ARRAY_ELEMS(log_levels); i++)
940
            av_log(NULL, AV_LOG_FATAL, "\"%s\"\n", log_levels[i].name);
941
        exit_program(1);
942
    }
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end:
    av_log_set_flags(flags);
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    av_log_set_level(level);
    return 0;
}

950 951
static void expand_filename_template(AVBPrint *bp, const char *template,
                                     struct tm *tm)
952
{
953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979
    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)
{
980
    char *filename_template = NULL;
981 982
    char *key, *val;
    int ret, count = 0;
983
    int prog_loglevel, envlevel = 0;
984 985
    time_t now;
    struct tm *tm;
986
    AVBPrint filename;
987 988 989 990 991

    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;
        }
1001 1002
        if (*env)
            env++;
1003 1004
        count++;
        if (!strcmp(key, "file")) {
1005
            av_free(filename_template);
1006 1007
            filename_template = val;
            val = NULL;
1008 1009 1010 1011 1012 1013 1014
        } 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);
            }
1015
            envlevel = 1;
1016 1017 1018 1019 1020 1021 1022
        } else {
            av_log(NULL, AV_LOG_ERROR, "Unknown key '%s' in FFREPORT\n", key);
        }
        av_free(val);
        av_free(key);
    }

1023
    av_bprint_init(&filename, 0, AV_BPRINT_SIZE_AUTOMATIC);
1024 1025 1026
    expand_filename_template(&filename,
                             av_x_if_null(filename_template, "%p-%t.log"), tm);
    av_free(filename_template);
1027 1028 1029 1030 1031
    if (!av_bprint_is_complete(&filename)) {
        av_log(NULL, AV_LOG_ERROR, "Out of memory building report file name\n");
        return AVERROR(ENOMEM);
    }

1032 1033 1034 1035
    prog_loglevel = av_log_get_level();
    if (!envlevel)
        report_file_level = FFMAX(report_file_level, prog_loglevel);

1036
    report_file = fopen(filename.str, "w");
1037
    if (!report_file) {
1038
        int ret = AVERROR(errno);
1039
        av_log(NULL, AV_LOG_ERROR, "Failed to open report \"%s\": %s\n",
1040
               filename.str, strerror(errno));
1041
        return ret;
1042 1043 1044 1045
    }
    av_log_set_callback(log_callback_report);
    av_log(NULL, AV_LOG_INFO,
           "%s started on %04d-%02d-%02d at %02d:%02d:%02d\n"
1046 1047
           "Report written to \"%s\"\n"
           "Log level: %d\n",
1048 1049 1050
           program_name,
           tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
           tm->tm_hour, tm->tm_min, tm->tm_sec,
1051
           filename.str, report_file_level);
1052
    av_bprint_finalize(&filename, NULL);
1053 1054 1055
    return 0;
}

1056
int opt_report(void *optctx, const char *opt, const char *arg)
1057 1058 1059 1060
{
    return init_report(NULL);
}

1061
int opt_max_alloc(void *optctx, const char *opt, const char *arg)
1062 1063 1064 1065 1066 1067 1068
{
    char *tail;
    size_t max;

    max = strtol(arg, &tail, 10);
    if (*tail) {
        av_log(NULL, AV_LOG_FATAL, "Invalid max_alloc \"%s\".\n", arg);
1069
        exit_program(1);
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    }
    av_max_alloc(max);
    return 0;
}

1075
int opt_timelimit(void *optctx, const char *opt, const char *arg)
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{
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#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
1083
    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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1088 1089
void print_error(const char *filename, int err)
{
1090
    char errbuf[128];
1091
    const char *errbuf_ptr = errbuf;
1092

1093 1094
    if (av_strerror(err, errbuf, sizeof(errbuf)) < 0)
        errbuf_ptr = strerror(AVUNERROR(err));
1095
    av_log(NULL, AV_LOG_ERROR, "%s: %s\n", filename, errbuf_ptr);
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}
1097

1098 1099
static int warned_cfg = 0;

1100 1101
#define INDENT        1
#define SHOW_VERSION  2
1102
#define SHOW_CONFIG   4
1103
#define SHOW_COPYRIGHT 8
1104

1105
#define PRINT_LIB_INFO(libname, LIBNAME, flags, level)                  \
1106
    if (CONFIG_##LIBNAME) {                                             \
1107
        const char *indent = flags & INDENT? "  " : "";                 \
1108
        if (flags & SHOW_VERSION) {                                     \
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1109
            unsigned int version = libname##_version();                 \
1110
            av_log(NULL, level,                                         \
1111
                   "%slib%-11s %2d.%3d.%3d / %2d.%3d.%3d\n",            \
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                   indent, #libname,                                    \
                   LIB##LIBNAME##_VERSION_MAJOR,                        \
                   LIB##LIBNAME##_VERSION_MINOR,                        \
                   LIB##LIBNAME##_VERSION_MICRO,                        \
1116 1117
                   AV_VERSION_MAJOR(version), AV_VERSION_MINOR(version),\
                   AV_VERSION_MICRO(version));                          \
1118
        }                                                               \
1119 1120
        if (flags & SHOW_CONFIG) {                                      \
            const char *cfg = libname##_configuration();                \
1121
            if (strcmp(FFMPEG_CONFIGURATION, cfg)) {                    \
1122
                if (!warned_cfg) {                                      \
1123
                    av_log(NULL, level,                                 \
1124
                            "%sWARNING: library configuration mismatch\n", \
1125
                            indent);                                    \
1126 1127
                    warned_cfg = 1;                                     \
                }                                                       \
1128
                av_log(NULL, level, "%s%-11s configuration: %s\n",      \
1129
                        indent, #libname, cfg);                         \
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            }                                                           \
        }                                                               \
1132
    }                                                                   \
1133

1134
static void print_all_libs_info(int flags, int level)
1135
{
1136 1137 1138 1139 1140
    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);
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    PRINT_LIB_INFO(avresample, AVRESAMPLE, flags, level);
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    PRINT_LIB_INFO(swscale,    SWSCALE,    flags, level);
    PRINT_LIB_INFO(swresample, SWRESAMPLE, flags, level);
    PRINT_LIB_INFO(postproc,   POSTPROC,   flags, level);
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}

1147 1148 1149 1150 1151 1152 1153
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",
1154
               program_birth_year, CONFIG_THIS_YEAR);
1155
    av_log(NULL, level, "\n");
1156
    av_log(NULL, level, "%sbuilt with %s\n", indent, CC_IDENT);
1157

1158 1159 1160
    av_log(NULL, level, "%sconfiguration: " FFMPEG_CONFIGURATION "\n", indent);
}

1161 1162
static void print_buildconf(int flags, int level)
{
1163
    const char *indent = flags & INDENT ? "  " : "";
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    char str[] = { FFMPEG_CONFIGURATION };
    char *conflist, *remove_tilde, *splitconf;

    // Change all the ' --' strings to '~--' so that
    // they can be identified as tokens.
1169
    while ((conflist = strstr(str, " --")) != NULL) {
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        strncpy(conflist, "~--", 3);
    }

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

    splitconf = strtok(str, "~");
1180
    av_log(NULL, level, "\n%sconfiguration:\n", indent);
1181
    while (splitconf != NULL) {
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        av_log(NULL, level, "%s%s%s\n", indent, indent, splitconf);
        splitconf = strtok(NULL, "~");
    }
}

1187
void show_banner(int argc, char **argv, const OptionDef *options)
1188
{
1189
    int idx = locate_option(argc, argv, options, "version");
1190
    if (hide_banner || idx)
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        return;

1193
    print_program_info (INDENT|SHOW_COPYRIGHT, AV_LOG_INFO);
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    print_all_libs_info(INDENT|SHOW_CONFIG,  AV_LOG_INFO);
    print_all_libs_info(INDENT|SHOW_VERSION, AV_LOG_INFO);
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}

1198
int show_version(void *optctx, const char *opt, const char *arg)
1199
{
1200
    av_log_set_callback(log_callback_help);
1201
    print_program_info (SHOW_COPYRIGHT, AV_LOG_INFO);
1202
    print_all_libs_info(SHOW_VERSION, AV_LOG_INFO);
1203

1204
    return 0;
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}

1207 1208 1209 1210 1211 1212 1213 1214
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;
}

1215
int show_license(void *optctx, const char *opt, const char *arg)
1216
{
1217
#if CONFIG_NONFREE
1218
    printf(
1219 1220
    "This version of %s has nonfree parts compiled in.\n"
    "Therefore it is not legally redistributable.\n",
1221
    program_name );
1222
#elif CONFIG_GPLV3
1223
    printf(
1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235
    "%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",
1236
    program_name, program_name, program_name );
1237
#elif CONFIG_GPL
1238
    printf(
1239
    "%s is free software; you can redistribute it and/or modify\n"
1240 1241 1242 1243
    "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"
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    "%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"
1250 1251
    "along with %s; if not, write to the Free Software\n"
    "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n",
1252
    program_name, program_name, program_name );
1253
#elif CONFIG_LGPLV3
1254
    printf(
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    "%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",
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    program_name, program_name, program_name );
1268
#else
1269
    printf(
1270
    "%s is free software; you can redistribute it and/or\n"
1271 1272 1273 1274
    "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"
1275
    "%s is distributed in the hope that it will be useful,\n"
1276 1277 1278 1279 1280
    "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"
1281 1282
    "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",
1283
    program_name, program_name, program_name );
1284
#endif
1285

1286
    return 0;
1287
}
1288

1289 1290 1291 1292 1293 1294 1295
static int is_device(const AVClass *avclass)
{
    if (!avclass)
        return 0;
    return AV_IS_INPUT_DEVICE(avclass->category) || AV_IS_OUTPUT_DEVICE(avclass->category);
}

1296
static int show_formats_devices(void *optctx, const char *opt, const char *arg, int device_only, int muxdemuxers)
1297
{
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    void *ifmt_opaque = NULL;
    const AVInputFormat *ifmt  = NULL;
    void *ofmt_opaque = NULL;
    const AVOutputFormat *ofmt = NULL;
1302
    const char *last_name;
1303
    int is_dev;
1304

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    printf("%s\n"
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           " D. = Demuxing supported\n"
           " .E = Muxing supported\n"
1308
           " --\n", device_only ? "Devices:" : "File formats:");
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    last_name = "000";
    for (;;) {
        int decode = 0;
        int encode = 0;
        const char *name      = NULL;
        const char *long_name = NULL;

1316
        if (muxdemuxers !=SHOW_DEMUXERS) {
1317
            ofmt_opaque = NULL;
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1318
            while ((ofmt = av_muxer_iterate(&ofmt_opaque))) {
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                is_dev = is_device(ofmt->priv_class);
                if (!is_dev && device_only)
                    continue;
                if ((!name || strcmp(ofmt->name, name) < 0) &&
                    strcmp(ofmt->name, last_name) > 0) {
                    name      = ofmt->name;
                    long_name = ofmt->long_name;
                    encode    = 1;
                }
            }
        }
        if (muxdemuxers != SHOW_MUXERS) {
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            ifmt_opaque = NULL;
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1332
            while ((ifmt = av_demuxer_iterate(&ifmt_opaque))) {
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                is_dev = is_device(ifmt->priv_class);
                if (!is_dev && device_only)
                    continue;
                if ((!name || strcmp(ifmt->name, name) < 0) &&
                    strcmp(ifmt->name, last_name) > 0) {
                    name      = ifmt->name;
                    long_name = ifmt->long_name;
                    encode    = 0;
                }
                if (name && strcmp(ifmt->name, name) == 0)
                    decode = 1;
            }
        }
1346
        if (!name)
1347
            break;
1348
        last_name = name;
1349

1350 1351 1352 1353
        printf(" %s%s %-15s %s\n",
               decode ? "D" : " ",
               encode ? "E" : " ",
               name,
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            long_name ? long_name:" ");
    }
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    return 0;
1357
}
1358

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int show_formats(void *optctx, const char *opt, const char *arg)
{
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    return show_formats_devices(optctx, opt, arg, 0, SHOW_DEFAULT);
}

int show_muxers(void *optctx, const char *opt, const char *arg)
{
    return show_formats_devices(optctx, opt, arg, 0, SHOW_MUXERS);
}

int show_demuxers(void *optctx, const char *opt, const char *arg)
{
    return show_formats_devices(optctx, opt, arg, 0, SHOW_DEMUXERS);
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}

int show_devices(void *optctx, const char *opt, const char *arg)
{
1376
    return show_formats_devices(optctx, opt, arg, 1, SHOW_DEFAULT);
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}

1379 1380
#define PRINT_CODEC_SUPPORTED(codec, field, type, list_name, term, get_name) \
    if (codec->field) {                                                      \
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        const type *p = codec->field;                                        \
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                                                                             \
        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 : "");

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    printf("    General capabilities: ");
    if (c->capabilities & AV_CODEC_CAP_DRAW_HORIZ_BAND)
        printf("horizband ");
    if (c->capabilities & AV_CODEC_CAP_DR1)
        printf("dr1 ");
    if (c->capabilities & AV_CODEC_CAP_TRUNCATED)
        printf("trunc ");
    if (c->capabilities & AV_CODEC_CAP_DELAY)
        printf("delay ");
    if (c->capabilities & AV_CODEC_CAP_SMALL_LAST_FRAME)
        printf("small ");
    if (c->capabilities & AV_CODEC_CAP_SUBFRAMES)
        printf("subframes ");
    if (c->capabilities & AV_CODEC_CAP_EXPERIMENTAL)
        printf("exp ");
    if (c->capabilities & AV_CODEC_CAP_CHANNEL_CONF)
        printf("chconf ");
    if (c->capabilities & AV_CODEC_CAP_PARAM_CHANGE)
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        printf("paramchange ");
    if (c->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE)
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        printf("variable ");
    if (c->capabilities & (AV_CODEC_CAP_FRAME_THREADS |
                           AV_CODEC_CAP_SLICE_THREADS |
                           AV_CODEC_CAP_AUTO_THREADS))
        printf("threads ");
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    if (c->capabilities & AV_CODEC_CAP_AVOID_PROBING)
        printf("avoidprobe ");
    if (c->capabilities & AV_CODEC_CAP_INTRA_ONLY)
        printf("intraonly ");
    if (c->capabilities & AV_CODEC_CAP_LOSSLESS)
        printf("lossless ");
    if (c->capabilities & AV_CODEC_CAP_HARDWARE)
        printf("hardware ");
    if (c->capabilities & AV_CODEC_CAP_HYBRID)
        printf("hybrid ");
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    if (!c->capabilities)
        printf("none");
    printf("\n");

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    if (c->type == AVMEDIA_TYPE_VIDEO ||
        c->type == AVMEDIA_TYPE_AUDIO) {
1440
        printf("    Threading capabilities: ");
1441
        switch (c->capabilities & (AV_CODEC_CAP_FRAME_THREADS |
1442 1443
                                   AV_CODEC_CAP_SLICE_THREADS |
                                   AV_CODEC_CAP_AUTO_THREADS)) {
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        case AV_CODEC_CAP_FRAME_THREADS |
             AV_CODEC_CAP_SLICE_THREADS: printf("frame and slice"); break;
        case AV_CODEC_CAP_FRAME_THREADS: printf("frame");           break;
        case AV_CODEC_CAP_SLICE_THREADS: printf("slice");           break;
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        case AV_CODEC_CAP_AUTO_THREADS : printf("auto");            break;
        default:                         printf("none");            break;
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        }
        printf("\n");
    }

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    if (avcodec_get_hw_config(c, 0)) {
        printf("    Supported hardware devices: ");
        for (int i = 0;; i++) {
            const AVCodecHWConfig *config = avcodec_get_hw_config(c, i);
            if (!config)
                break;
            printf("%s ", av_hwdevice_get_type_name(config->device_type));
        }
        printf("\n");
    }

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    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");
    }
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    PRINT_CODEC_SUPPORTED(c, pix_fmts, enum AVPixelFormat, "pixel formats",
                          AV_PIX_FMT_NONE, GET_PIX_FMT_NAME);
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    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);
    }
}

1491 1492
static char get_media_type_char(enum AVMediaType type)
{
1493 1494 1495
    switch (type) {
        case AVMEDIA_TYPE_VIDEO:    return 'V';
        case AVMEDIA_TYPE_AUDIO:    return 'A';
1496
        case AVMEDIA_TYPE_DATA:     return 'D';
1497
        case AVMEDIA_TYPE_SUBTITLE: return 'S';
1498
        case AVMEDIA_TYPE_ATTACHMENT:return 'T';
1499 1500
        default:                    return '?';
    }
1501 1502
}

1503 1504
static const AVCodec *next_codec_for_id(enum AVCodecID id, const AVCodec *prev,
                                        int encoder)
1505
{
1506
    while ((prev = av_codec_next(prev))) {
1507 1508 1509 1510 1511 1512 1513
        if (prev->id == id &&
            (encoder ? av_codec_is_encoder(prev) : av_codec_is_decoder(prev)))
            return prev;
    }
    return NULL;
}

1514 1515 1516 1517 1518
static int compare_codec_desc(const void *a, const void *b)
{
    const AVCodecDescriptor * const *da = a;
    const AVCodecDescriptor * const *db = b;

1519
    return (*da)->type != (*db)->type ? FFDIFFSIGN((*da)->type, (*db)->type) :
1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531
           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)))) {
1532
        av_log(NULL, AV_LOG_ERROR, "Out of memory\n");
1533
        exit_program(1);
1534 1535 1536 1537 1538 1539 1540 1541 1542 1543
    }
    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;
}

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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(")");
}

1556
int show_codecs(void *optctx, const char *opt, const char *arg)
1557
{
1558 1559
    const AVCodecDescriptor **codecs;
    unsigned i, nb_codecs = get_codecs_sorted(&codecs);
1560

1561
    printf("Codecs:\n"
1562 1563 1564 1565 1566 1567 1568 1569 1570
           " 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");
1571 1572
    for (i = 0; i < nb_codecs; i++) {
        const AVCodecDescriptor *desc = codecs[i];
1573 1574
        const AVCodec *codec = NULL;

1575 1576 1577
        if (strstr(desc->name, "_deprecated"))
            continue;

1578
        printf(" ");
1579 1580 1581 1582 1583
        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" : ".");
1584 1585
        printf((desc->props & AV_CODEC_PROP_LOSSY)      ? "L" : ".");
        printf((desc->props & AV_CODEC_PROP_LOSSLESS)   ? "S" : ".");
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        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;
1595
            }
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        }
        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;
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            }
        }

        printf("\n");
    }
1607
    av_free(codecs);
1608
    return 0;
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}

static void print_codecs(int encoder)
{
1613 1614
    const AVCodecDescriptor **codecs;
    unsigned i, nb_codecs = get_codecs_sorted(&codecs);
1615 1616

    printf("%s:\n"
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           " 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",
1626
           encoder ? "Encoders" : "Decoders");
1627 1628
    for (i = 0; i < nb_codecs; i++) {
        const AVCodecDescriptor *desc = codecs[i];
1629 1630 1631
        const AVCodec *codec = NULL;

        while ((codec = next_codec_for_id(desc->id, codec, encoder))) {
1632
            printf(" %c", get_media_type_char(desc->type));
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            printf((codec->capabilities & AV_CODEC_CAP_FRAME_THREADS) ? "F" : ".");
            printf((codec->capabilities & AV_CODEC_CAP_SLICE_THREADS) ? "S" : ".");
            printf((codec->capabilities & AV_CODEC_CAP_EXPERIMENTAL)  ? "X" : ".");
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            printf((codec->capabilities & AV_CODEC_CAP_DRAW_HORIZ_BAND)?"B" : ".");
            printf((codec->capabilities & AV_CODEC_CAP_DR1)           ? "D" : ".");
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            printf(" %-20s %s", codec->name, codec->long_name ? codec->long_name : "");
            if (strcmp(codec->name, desc->name))
                printf(" (codec %s)", desc->name);

            printf("\n");
        }
    }
1646
    av_free(codecs);
1647 1648
}

1649
int show_decoders(void *optctx, const char *opt, const char *arg)
1650 1651 1652 1653 1654
{
    print_codecs(0);
    return 0;
}

1655
int show_encoders(void *optctx, const char *opt, const char *arg)
1656 1657
{
    print_codecs(1);
1658
    return 0;
1659 1660
}

1661
int show_bsfs(void *optctx, const char *opt, const char *arg)
1662
{
1663 1664
    const AVBitStreamFilter *bsf = NULL;
    void *opaque = NULL;
1665 1666

    printf("Bitstream filters:\n");
1667
    while ((bsf = av_bsf_iterate(&opaque)))
1668
        printf("%s\n", bsf->name);
1669
    printf("\n");
1670
    return 0;
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}

1673
int show_protocols(void *optctx, const char *opt, const char *arg)
1674
{
1675 1676
    void *opaque = NULL;
    const char *name;
1677

1678
    printf("Supported file protocols:\n"
1679 1680
           "Input:\n");
    while ((name = avio_enum_protocols(&opaque, 0)))
1681
        printf("  %s\n", name);
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    printf("Output:\n");
    while ((name = avio_enum_protocols(&opaque, 1)))
1684
        printf("  %s\n", name);
1685
    return 0;
1686
}
1687

1688
int show_filters(void *optctx, const char *opt, const char *arg)
1689
{
1690 1691
#if CONFIG_AVFILTER
    const AVFilter *filter = NULL;
1692
    char descr[64], *descr_cur;
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1693
    void *opaque = NULL;
1694 1695
    int i, j;
    const AVFilterPad *pad;
1696

1697
    printf("Filters:\n"
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           "  T.. = Timeline support\n"
           "  .S. = Slice threading\n"
1700
           "  ..C = Command support\n"
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           "  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");
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    while ((filter = av_filter_iterate(&opaque))) {
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        descr_cur = descr;
        for (i = 0; i < 2; i++) {
            if (i) {
                *(descr_cur++) = '-';
                *(descr_cur++) = '>';
            }
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            pad = i ? filter->outputs : filter->inputs;
1713
            for (j = 0; pad && avfilter_pad_get_name(pad, j); j++) {
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                if (descr_cur >= descr + sizeof(descr) - 4)
                    break;
1716
                *(descr_cur++) = get_media_type_char(avfilter_pad_get_type(pad, j));
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            }
            if (!j)
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                *(descr_cur++) = ((!i && (filter->flags & AVFILTER_FLAG_DYNAMIC_INPUTS)) ||
                                  ( i && (filter->flags & AVFILTER_FLAG_DYNAMIC_OUTPUTS))) ? 'N' : '|';
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        }
        *descr_cur = 0;
1723
        printf(" %c%c%c %-17s %-10s %s\n",
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               filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE ? 'T' : '.',
               filter->flags & AVFILTER_FLAG_SLICE_THREADS    ? 'S' : '.',
1726
               filter->process_command                        ? 'C' : '.',
1727
               filter->name, descr, filter->description);
1728
    }
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#else
    printf("No filters available: libavfilter disabled\n");
1731
#endif
1732
    return 0;
1733 1734
}

1735
int show_colors(void *optctx, const char *opt, const char *arg)
1736 1737 1738 1739 1740 1741 1742 1743 1744
{
    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]);
1745 1746

    return 0;
1747 1748
}

1749
int show_pix_fmts(void *optctx, const char *opt, const char *arg)
1750
{
1751
    const AVPixFmtDescriptor *pix_desc = NULL;
1752

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    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");
1761

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#if !CONFIG_SWSCALE
#   define sws_isSupportedInput(x)  0
#   define sws_isSupportedOutput(x) 0
#endif

1767
    while ((pix_desc = av_pix_fmt_desc_next(pix_desc))) {
1768
        enum AVPixelFormat av_unused pix_fmt = av_pix_fmt_desc_get_id(pix_desc);
1769
        printf("%c%c%c%c%c %-16s       %d            %2d\n",
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               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' : '.',
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               pix_desc->name,
               pix_desc->nb_components,
               av_get_bits_per_pixel(pix_desc));
    }
1779
    return 0;
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}

1782
int show_layouts(void *optctx, const char *opt, const char *arg)
1783 1784 1785 1786 1787 1788
{
    int i = 0;
    uint64_t layout, j;
    const char *name, *descr;

    printf("Individual channels:\n"
1789
           "NAME           DESCRIPTION\n");
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    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);
1795
        printf("%-14s %s\n", name, descr);
1796 1797
    }
    printf("\nStandard channel layouts:\n"
1798
           "NAME           DECOMPOSITION\n");
1799 1800
    for (i = 0; !av_get_standard_channel_layout(i, &layout, &name); i++) {
        if (name) {
1801
            printf("%-14s ", name);
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            for (j = 1; j; j <<= 1)
                if ((layout & j))
                    printf("%s%s", (layout & (j - 1)) ? "+" : "", av_get_channel_name(j));
            printf("\n");
        }
    }
    return 0;
}

1811
int show_sample_fmts(void *optctx, const char *opt, const char *arg)
1812 1813 1814 1815 1816 1817 1818 1819
{
    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;
}

1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843
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) {
1844 1845
            av_log(NULL, AV_LOG_ERROR, "Codec '%s' is known to FFmpeg, "
                   "but no %s for it are available. FFmpeg might need to be "
1846 1847 1848 1849
                   "recompiled with additional external libraries.\n",
                   name, encoder ? "encoders" : "decoders");
        }
    } else {
1850
        av_log(NULL, AV_LOG_ERROR, "Codec '%s' is not recognized by FFmpeg.\n",
1851 1852 1853 1854
               name);
    }
}

1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872
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);
}

1873 1874
static void show_help_protocol(const char *name)
{
1875
    const AVClass *proto_class;
1876

1877 1878 1879 1880 1881 1882
    if (!name) {
        av_log(NULL, AV_LOG_ERROR, "No protocol name specified.\n");
        return;
    }

    proto_class = avio_protocol_get_class(name);
1883 1884 1885 1886 1887 1888 1889 1890
    if (!proto_class) {
        av_log(NULL, AV_LOG_ERROR, "Unknown protocol '%s'.\n", name);
        return;
    }

    show_help_children(proto_class, AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_ENCODING_PARAM);
}

1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923
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);
}

1924
#if CONFIG_AVFILTER
1925 1926
static void show_help_filter(const char *name)
{
1927
#if CONFIG_AVFILTER
1928 1929
    const AVFilter *f = avfilter_get_by_name(name);
    int i, count;
1930 1931 1932 1933

    if (!name) {
        av_log(NULL, AV_LOG_ERROR, "No filter name specified.\n");
        return;
1934 1935
    } else if (!f) {
        av_log(NULL, AV_LOG_ERROR, "Unknown filter '%s'.\n", name);
1936 1937
        return;
    }
1938

1939 1940 1941
    printf("Filter %s\n", f->name);
    if (f->description)
        printf("  %s\n", f->description);
1942 1943 1944

    if (f->flags & AVFILTER_FLAG_SLICE_THREADS)
        printf("    slice threading supported\n");
1945 1946 1947 1948

    printf("    Inputs:\n");
    count = avfilter_pad_count(f->inputs);
    for (i = 0; i < count; i++) {
1949
        printf("       #%d: %s (%s)\n", i, avfilter_pad_get_name(f->inputs, i),
1950 1951 1952 1953
               media_type_string(avfilter_pad_get_type(f->inputs, i)));
    }
    if (f->flags & AVFILTER_FLAG_DYNAMIC_INPUTS)
        printf("        dynamic (depending on the options)\n");
1954 1955
    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++) {
1960
        printf("       #%d: %s (%s)\n", i, avfilter_pad_get_name(f->outputs, i),
1961 1962 1963 1964
               media_type_string(avfilter_pad_get_type(f->outputs, i)));
    }
    if (f->flags & AVFILTER_FLAG_DYNAMIC_OUTPUTS)
        printf("        dynamic (depending on the options)\n");
1965 1966
    else if (!count)
        printf("        none (sink filter)\n");
1967 1968

    if (f->priv_class)
1969
        show_help_children(f->priv_class, AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM |
1970
                                          AV_OPT_FLAG_AUDIO_PARAM);
1971 1972
    if (f->flags & AVFILTER_FLAG_SUPPORT_TIMELINE)
        printf("This filter has support for timeline through the 'enable' option.\n");
1973 1974 1975 1976
#else
    av_log(NULL, AV_LOG_ERROR, "Build without libavfilter; "
           "can not to satisfy request\n");
#endif
1977
}
1978
#endif
1979

1980 1981 1982 1983
static void show_help_bsf(const char *name)
{
    const AVBitStreamFilter *bsf = av_bsf_get_by_name(name);

1984 1985 1986 1987
    if (!name) {
        av_log(NULL, AV_LOG_ERROR, "No bitstream filter name specified.\n");
        return;
    } else if (!bsf) {
1988 1989 1990 1991 1992
        av_log(NULL, AV_LOG_ERROR, "Unknown bit stream filter '%s'.\n", name);
        return;
    }

    printf("Bit stream filter %s\n", bsf->name);
1993 1994
    PRINT_CODEC_SUPPORTED(bsf, codec_ids, enum AVCodecID, "codecs",
                          AV_CODEC_ID_NONE, GET_CODEC_NAME);
1995 1996 1997 1998
    if (bsf->priv_class)
        show_help_children(bsf->priv_class, AV_OPT_FLAG_BSF_PARAM);
}

1999
int show_help(void *optctx, const char *opt, const char *arg)
2000 2001 2002 2003 2004
{
    char *topic, *par;
    av_log_set_callback(log_callback_help);

    topic = av_strdup(arg ? arg : "");
2005 2006
    if (!topic)
        return AVERROR(ENOMEM);
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    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);
2017 2018 2019 2020
    } else if (!strcmp(topic, "demuxer")) {
        show_help_demuxer(par);
    } else if (!strcmp(topic, "muxer")) {
        show_help_muxer(par);
2021 2022
    } else if (!strcmp(topic, "protocol")) {
        show_help_protocol(par);
2023
#if CONFIG_AVFILTER
2024 2025
    } else if (!strcmp(topic, "filter")) {
        show_help_filter(par);
2026
#endif
2027 2028
    } else if (!strcmp(topic, "bsf")) {
        show_help_bsf(par);
2029 2030 2031 2032 2033 2034 2035 2036
    } else {
        show_help_default(topic, par);
    }

    av_freep(&topic);
    return 0;
}

2037 2038 2039
int read_yesno(void)
{
    int c = getchar();
2040
    int yesno = (av_toupper(c) == 'Y');
2041 2042 2043 2044 2045 2046

    while (c != '\n' && c != EOF)
        c = getchar();

    return yesno;
}
2047

2048
FILE *get_preset_file(char *filename, size_t filename_size,
2049 2050
                      const char *preset_name, int is_path,
                      const char *codec_name)
2051 2052 2053
{
    FILE *f = NULL;
    int i;
2054
    const char *base[3] = { getenv("FFMPEG_DATADIR"),
2055
                            getenv("HOME"),
2056
                            FFMPEG_DATADIR, };
2057 2058 2059 2060 2061

    if (is_path) {
        av_strlcpy(filename, preset_name, filename_size);
        f = fopen(filename, "r");
    } else {
2062
#if HAVE_GETMODULEHANDLE && defined(_WIN32)
Gianluigi Tiesi's avatar
Gianluigi Tiesi committed
2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078
        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
2079 2080 2081
        for (i = 0; i < 3 && !f; i++) {
            if (!base[i])
                continue;
2082
            snprintf(filename, filename_size, "%s%s/%s.ffpreset", base[i],
2083
                     i != 1 ? "" : "/.ffmpeg", preset_name);
2084 2085 2086
            f = fopen(filename, "r");
            if (!f && codec_name) {
                snprintf(filename, filename_size,
2087
                         "%s%s/%s-%s.ffpreset",
2088
                         base[i], i != 1 ? "" : "/.ffmpeg", codec_name,
2089
                         preset_name);
2090 2091 2092 2093 2094 2095 2096 2097
                f = fopen(filename, "r");
            }
        }
    }

    return f;
}

2098 2099
int check_stream_specifier(AVFormatContext *s, AVStream *st, const char *spec)
{
2100 2101 2102 2103
    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;
2104 2105
}

2106
AVDictionary *filter_codec_opts(AVDictionary *opts, enum AVCodecID codec_id,
2107
                                AVFormatContext *s, AVStream *st, AVCodec *codec)
2108 2109 2110
{
    AVDictionary    *ret = NULL;
    AVDictionaryEntry *t = NULL;
2111 2112
    int            flags = s->oformat ? AV_OPT_FLAG_ENCODING_PARAM
                                      : AV_OPT_FLAG_DECODING_PARAM;
2113
    char          prefix = 0;
2114
    const AVClass    *cc = avcodec_get_class();
2115

2116 2117 2118
    if (!codec)
        codec            = s->oformat ? avcodec_find_encoder(codec_id)
                                      : avcodec_find_decoder(codec_id);
2119

2120
    switch (st->codecpar->codec_type) {
2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132
    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;
2133 2134 2135
    }

    while (t = av_dict_get(opts, "", t, AV_DICT_IGNORE_SUFFIX)) {
2136 2137 2138 2139 2140 2141 2142
        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;
2143
            default:         exit_program(1);
2144 2145
            }

2146
        if (av_opt_find(&cc, t->key, NULL, flags, AV_OPT_SEARCH_FAKE_OBJ) ||
2147 2148
            !codec ||
            (codec->priv_class &&
2149 2150
             av_opt_find(&codec->priv_class, t->key, NULL, flags,
                         AV_OPT_SEARCH_FAKE_OBJ)))
2151
            av_dict_set(&ret, t->key, t->value, 0);
2152 2153 2154 2155
        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);
2156 2157 2158

        if (p)
            *p = ':';
2159 2160 2161 2162
    }
    return ret;
}

2163 2164
AVDictionary **setup_find_stream_info_opts(AVFormatContext *s,
                                           AVDictionary *codec_opts)
2165 2166 2167 2168 2169 2170
{
    int i;
    AVDictionary **opts;

    if (!s->nb_streams)
        return NULL;
2171
    opts = av_mallocz_array(s->nb_streams, sizeof(*opts));
2172
    if (!opts) {
2173 2174
        av_log(NULL, AV_LOG_ERROR,
               "Could not alloc memory for stream options.\n");
2175 2176 2177
        return NULL;
    }
    for (i = 0; i < s->nb_streams; i++)
2178
        opts[i] = filter_codec_opts(codec_opts, s->streams[i]->codecpar->codec_id,
2179
                                    s, s->streams[i], NULL);
2180 2181 2182
    return opts;
}

2183 2184 2185 2186
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");
2187
        exit_program(1);
2188 2189
    }
    if (*size < new_size) {
2190
        uint8_t *tmp = av_realloc_array(array, new_size, elem_size);
2191 2192
        if (!tmp) {
            av_log(NULL, AV_LOG_ERROR, "Could not alloc buffer.\n");
2193
            exit_program(1);
2194 2195 2196 2197 2198 2199 2200
        }
        memset(tmp + *size*elem_size, 0, (new_size-*size) * elem_size);
        *size = new_size;
        return tmp;
    }
    return array;
}
2201

2202 2203 2204 2205 2206
double get_rotation(AVStream *st)
{
    uint8_t* displaymatrix = av_stream_get_side_data(st,
                                                     AV_PKT_DATA_DISPLAYMATRIX, NULL);
    double theta = 0;
2207
    if (displaymatrix)
2208
        theta = -av_display_rotation_get((int32_t*) displaymatrix);
2209 2210 2211 2212

    theta -= 360*floor(theta/360 + 0.9/360);

    if (fabs(theta - 90*round(theta/90)) > 2)
2213 2214 2215 2216
        av_log(NULL, AV_LOG_WARNING, "Odd rotation angle.\n"
               "If you want to help, upload a sample "
               "of this file to ftp://upload.ffmpeg.org/incoming/ "
               "and contact the ffmpeg-devel mailing list. (ffmpeg-devel@ffmpeg.org)");
2217 2218 2219 2220

    return theta;
}

2221
#if CONFIG_AVDEVICE
2222
static int print_device_sources(AVInputFormat *fmt, AVDictionary *opts)
2223 2224 2225 2226 2227 2228 2229
{
    int ret, i;
    AVDeviceInfoList *device_list = NULL;

    if (!fmt || !fmt->priv_class  || !AV_IS_INPUT_DEVICE(fmt->priv_class->category))
        return AVERROR(EINVAL);

Moritz Barsnick's avatar
Moritz Barsnick committed
2230
    printf("Auto-detected sources for %s:\n", fmt->name);
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    if (!fmt->get_device_list) {
        ret = AVERROR(ENOSYS);
        printf("Cannot list sources. Not implemented.\n");
        goto fail;
    }

2237
    if ((ret = avdevice_list_input_sources(fmt, NULL, opts, &device_list)) < 0) {
2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251
        printf("Cannot list sources.\n");
        goto fail;
    }

    for (i = 0; i < device_list->nb_devices; i++) {
        printf("%s %s [%s]\n", device_list->default_device == i ? "*" : " ",
               device_list->devices[i]->device_name, device_list->devices[i]->device_description);
    }

  fail:
    avdevice_free_list_devices(&device_list);
    return ret;
}

2252
static int print_device_sinks(AVOutputFormat *fmt, AVDictionary *opts)
2253 2254 2255 2256 2257 2258 2259
{
    int ret, i;
    AVDeviceInfoList *device_list = NULL;

    if (!fmt || !fmt->priv_class  || !AV_IS_OUTPUT_DEVICE(fmt->priv_class->category))
        return AVERROR(EINVAL);

Moritz Barsnick's avatar
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    printf("Auto-detected sinks for %s:\n", fmt->name);
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    if (!fmt->get_device_list) {
        ret = AVERROR(ENOSYS);
        printf("Cannot list sinks. Not implemented.\n");
        goto fail;
    }

2267
    if ((ret = avdevice_list_output_sinks(fmt, NULL, opts, &device_list)) < 0) {
2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305
        printf("Cannot list sinks.\n");
        goto fail;
    }

    for (i = 0; i < device_list->nb_devices; i++) {
        printf("%s %s [%s]\n", device_list->default_device == i ? "*" : " ",
               device_list->devices[i]->device_name, device_list->devices[i]->device_description);
    }

  fail:
    avdevice_free_list_devices(&device_list);
    return ret;
}

static int show_sinks_sources_parse_arg(const char *arg, char **dev, AVDictionary **opts)
{
    int ret;
    if (arg) {
        char *opts_str = NULL;
        av_assert0(dev && opts);
        *dev = av_strdup(arg);
        if (!*dev)
            return AVERROR(ENOMEM);
        if ((opts_str = strchr(*dev, ','))) {
            *(opts_str++) = '\0';
            if (opts_str[0] && ((ret = av_dict_parse_string(opts, opts_str, "=", ":", 0)) < 0)) {
                av_freep(dev);
                return ret;
            }
        }
    } else
        printf("\nDevice name is not provided.\n"
                "You can pass devicename[,opt1=val1[,opt2=val2...]] as an argument.\n\n");
    return 0;
}

int show_sources(void *optctx, const char *opt, const char *arg)
{
2306
    AVInputFormat *fmt = NULL;
2307 2308 2309 2310 2311 2312 2313 2314 2315 2316
    char *dev = NULL;
    AVDictionary *opts = NULL;
    int ret = 0;
    int error_level = av_log_get_level();

    av_log_set_level(AV_LOG_ERROR);

    if ((ret = show_sinks_sources_parse_arg(arg, &dev, &opts)) < 0)
        goto fail;

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    do {
        fmt = av_input_audio_device_next(fmt);
        if (fmt) {
            if (!strcmp(fmt->name, "lavfi"))
                continue; //it's pointless to probe lavfi
            if (dev && !av_match_name(dev, fmt->name))
                continue;
            print_device_sources(fmt, opts);
        }
    } while (fmt);
    do {
        fmt = av_input_video_device_next(fmt);
        if (fmt) {
            if (dev && !av_match_name(dev, fmt->name))
                continue;
            print_device_sources(fmt, opts);
        }
    } while (fmt);
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  fail:
    av_dict_free(&opts);
    av_free(dev);
    av_log_set_level(error_level);
    return ret;
}

int show_sinks(void *optctx, const char *opt, const char *arg)
{
2344
    AVOutputFormat *fmt = NULL;
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    char *dev = NULL;
    AVDictionary *opts = NULL;
    int ret = 0;
    int error_level = av_log_get_level();

    av_log_set_level(AV_LOG_ERROR);

    if ((ret = show_sinks_sources_parse_arg(arg, &dev, &opts)) < 0)
        goto fail;

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    do {
        fmt = av_output_audio_device_next(fmt);
        if (fmt) {
            if (dev && !av_match_name(dev, fmt->name))
                continue;
            print_device_sinks(fmt, opts);
        }
    } while (fmt);
    do {
        fmt = av_output_video_device_next(fmt);
        if (fmt) {
            if (dev && !av_match_name(dev, fmt->name))
                continue;
            print_device_sinks(fmt, opts);
        }
    } while (fmt);
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  fail:
    av_dict_free(&opts);
    av_free(dev);
    av_log_set_level(error_level);
    return ret;
}
2377

2378
#endif