[FFmpeg-cvslog] Merge commit '908f737d6c2900b5d34319ca6ea1d1cb71221463'

James Almer git at videolan.org
Wed Nov 1 23:03:02 EET 2017


ffmpeg | branch: master | James Almer <jamrial at gmail.com> | Wed Nov  1 18:01:32 2017 -0300| [26868f80e0255483df7de97b3b225a836ef33e60] | committer: James Almer

Merge commit '908f737d6c2900b5d34319ca6ea1d1cb71221463'

* commit '908f737d6c2900b5d34319ca6ea1d1cb71221463':
  cmdutils: Mark conditionally used variable as av_unused

Merged-by: James Almer <jamrial at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=26868f80e0255483df7de97b3b225a836ef33e60
---

 fftools/cmdutils.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fftools/cmdutils.c b/fftools/cmdutils.c
index 3d428f3eea..6920ca0764 100644
--- a/fftools/cmdutils.c
+++ b/fftools/cmdutils.c
@@ -38,6 +38,7 @@
 #include "libswscale/swscale.h"
 #include "libswresample/swresample.h"
 #include "libpostproc/postprocess.h"
+#include "libavutil/attributes.h"
 #include "libavutil/avassert.h"
 #include "libavutil/avstring.h"
 #include "libavutil/bprint.h"
@@ -1702,7 +1703,7 @@ int show_pix_fmts(void *optctx, const char *opt, const char *arg)
 #endif
 
     while ((pix_desc = av_pix_fmt_desc_next(pix_desc))) {
-        enum AVPixelFormat pix_fmt = av_pix_fmt_desc_get_id(pix_desc);
+        enum AVPixelFormat av_unused pix_fmt = av_pix_fmt_desc_get_id(pix_desc);
         printf("%c%c%c%c%c %-16s       %d            %2d\n",
                sws_isSupportedInput (pix_fmt)              ? 'I' : '.',
                sws_isSupportedOutput(pix_fmt)              ? 'O' : '.',


======================================================================

diff --cc fftools/cmdutils.c
index 3d428f3eea,0000000000..6920ca0764
mode 100644,000000..100644
--- a/fftools/cmdutils.c
+++ b/fftools/cmdutils.c
@@@ -1,2274 -1,0 +1,2275 @@@
 +/*
 + * Various utilities for command line tools
 + * Copyright (c) 2000-2003 Fabrice Bellard
 + *
 + * This file is part of FFmpeg.
 + *
 + * FFmpeg is free software; you can redistribute it and/or
 + * modify it under the terms of the GNU Lesser General Public
 + * License as published by the Free Software Foundation; either
 + * version 2.1 of the License, or (at your option) any later version.
 + *
 + * FFmpeg is distributed in the hope that it will be useful,
 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 + * Lesser General Public License for more details.
 + *
 + * You should have received a copy of the GNU Lesser General Public
 + * License along with FFmpeg; if not, write to the Free Software
 + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 + */
 +
 +#include <string.h>
 +#include <stdint.h>
 +#include <stdlib.h>
 +#include <errno.h>
 +#include <math.h>
 +
 +/* Include only the enabled headers since some compilers (namely, Sun
 +   Studio) will not omit unused inline functions and create undefined
 +   references to libraries that are not being built. */
 +
 +#include "config.h"
 +#include "compat/va_copy.h"
 +#include "libavformat/avformat.h"
 +#include "libavfilter/avfilter.h"
 +#include "libavdevice/avdevice.h"
 +#include "libavresample/avresample.h"
 +#include "libswscale/swscale.h"
 +#include "libswresample/swresample.h"
 +#include "libpostproc/postprocess.h"
++#include "libavutil/attributes.h"
 +#include "libavutil/avassert.h"
 +#include "libavutil/avstring.h"
 +#include "libavutil/bprint.h"
 +#include "libavutil/display.h"
 +#include "libavutil/mathematics.h"
 +#include "libavutil/imgutils.h"
 +#include "libavutil/libm.h"
 +#include "libavutil/parseutils.h"
 +#include "libavutil/pixdesc.h"
 +#include "libavutil/eval.h"
 +#include "libavutil/dict.h"
 +#include "libavutil/opt.h"
 +#include "libavutil/cpu.h"
 +#include "libavutil/ffversion.h"
 +#include "libavutil/version.h"
 +#include "cmdutils.h"
 +#if CONFIG_NETWORK
 +#include "libavformat/network.h"
 +#endif
 +#if HAVE_SYS_RESOURCE_H
 +#include <sys/time.h>
 +#include <sys/resource.h>
 +#endif
 +#ifdef _WIN32
 +#include <windows.h>
 +#endif
 +
 +static int init_report(const char *env);
 +
 +AVDictionary *sws_dict;
 +AVDictionary *swr_opts;
 +AVDictionary *format_opts, *codec_opts, *resample_opts;
 +
 +static FILE *report_file;
 +static int report_file_level = AV_LOG_DEBUG;
 +int hide_banner = 0;
 +
 +enum show_muxdemuxers {
 +    SHOW_DEFAULT,
 +    SHOW_DEMUXERS,
 +    SHOW_MUXERS,
 +};
 +
 +void init_opts(void)
 +{
 +    av_dict_set(&sws_dict, "flags", "bicubic", 0);
 +}
 +
 +void uninit_opts(void)
 +{
 +    av_dict_free(&swr_opts);
 +    av_dict_free(&sws_dict);
 +    av_dict_free(&format_opts);
 +    av_dict_free(&codec_opts);
 +    av_dict_free(&resample_opts);
 +}
 +
 +void log_callback_help(void *ptr, int level, const char *fmt, va_list vl)
 +{
 +    vfprintf(stdout, fmt, vl);
 +}
 +
 +static void log_callback_report(void *ptr, int level, const char *fmt, va_list vl)
 +{
 +    va_list vl2;
 +    char line[1024];
 +    static int print_prefix = 1;
 +
 +    va_copy(vl2, vl);
 +    av_log_default_callback(ptr, level, fmt, vl);
 +    av_log_format_line(ptr, level, fmt, vl2, line, sizeof(line), &print_prefix);
 +    va_end(vl2);
 +    if (report_file_level >= level) {
 +        fputs(line, report_file);
 +        fflush(report_file);
 +    }
 +}
 +
 +void init_dynload(void)
 +{
 +#ifdef _WIN32
 +    /* Calling SetDllDirectory with the empty string (but not NULL) removes the
 +     * current working directory from the DLL search path as a security pre-caution. */
 +    SetDllDirectory("");
 +#endif
 +}
 +
 +static void (*program_exit)(int ret);
 +
 +void register_exit(void (*cb)(int ret))
 +{
 +    program_exit = cb;
 +}
 +
 +void exit_program(int ret)
 +{
 +    if (program_exit)
 +        program_exit(ret);
 +
 +    exit(ret);
 +}
 +
 +double parse_number_or_die(const char *context, const char *numstr, int type,
 +                           double min, double max)
 +{
 +    char *tail;
 +    const char *error;
 +    double d = av_strtod(numstr, &tail);
 +    if (*tail)
 +        error = "Expected number for %s but found: %s\n";
 +    else if (d < min || d > max)
 +        error = "The value for %s was %s which is not within %f - %f\n";
 +    else if (type == OPT_INT64 && (int64_t)d != d)
 +        error = "Expected int64 for %s but found %s\n";
 +    else if (type == OPT_INT && (int)d != d)
 +        error = "Expected int for %s but found %s\n";
 +    else
 +        return d;
 +    av_log(NULL, AV_LOG_FATAL, error, context, numstr, min, max);
 +    exit_program(1);
 +    return 0;
 +}
 +
 +int64_t parse_time_or_die(const char *context, const char *timestr,
 +                          int is_duration)
 +{
 +    int64_t us;
 +    if (av_parse_time(&us, timestr, is_duration) < 0) {
 +        av_log(NULL, AV_LOG_FATAL, "Invalid %s specification for %s: %s\n",
 +               is_duration ? "duration" : "date", context, timestr);
 +        exit_program(1);
 +    }
 +    return us;
 +}
 +
 +void show_help_options(const OptionDef *options, const char *msg, int req_flags,
 +                       int rej_flags, int alt_flags)
 +{
 +    const OptionDef *po;
 +    int first;
 +
 +    first = 1;
 +    for (po = options; po->name; po++) {
 +        char buf[64];
 +
 +        if (((po->flags & req_flags) != req_flags) ||
 +            (alt_flags && !(po->flags & alt_flags)) ||
 +            (po->flags & rej_flags))
 +            continue;
 +
 +        if (first) {
 +            printf("%s\n", msg);
 +            first = 0;
 +        }
 +        av_strlcpy(buf, po->name, sizeof(buf));
 +        if (po->argname) {
 +            av_strlcat(buf, " ", sizeof(buf));
 +            av_strlcat(buf, po->argname, sizeof(buf));
 +        }
 +        printf("-%-17s  %s\n", buf, po->help);
 +    }
 +    printf("\n");
 +}
 +
 +void show_help_children(const AVClass *class, int flags)
 +{
 +    const AVClass *child = NULL;
 +    if (class->option) {
 +        av_opt_show2(&class, NULL, flags, 0);
 +        printf("\n");
 +    }
 +
 +    while (child = av_opt_child_class_next(class, child))
 +        show_help_children(child, flags);
 +}
 +
 +static const OptionDef *find_option(const OptionDef *po, const char *name)
 +{
 +    const char *p = strchr(name, ':');
 +    int len = p ? p - name : strlen(name);
 +
 +    while (po->name) {
 +        if (!strncmp(name, po->name, len) && strlen(po->name) == len)
 +            break;
 +        po++;
 +    }
 +    return po;
 +}
 +
 +/* _WIN32 means using the windows libc - cygwin doesn't define that
 + * by default. HAVE_COMMANDLINETOARGVW is true on cygwin, while
 + * it doesn't provide the actual command line via GetCommandLineW(). */
 +#if HAVE_COMMANDLINETOARGVW && defined(_WIN32)
 +#include <shellapi.h>
 +/* Will be leaked on exit */
 +static char** win32_argv_utf8 = NULL;
 +static int win32_argc = 0;
 +
 +/**
 + * Prepare command line arguments for executable.
 + * For Windows - perform wide-char to UTF-8 conversion.
 + * Input arguments should be main() function arguments.
 + * @param argc_ptr Arguments number (including executable)
 + * @param argv_ptr Arguments list.
 + */
 +static void prepare_app_arguments(int *argc_ptr, char ***argv_ptr)
 +{
 +    char *argstr_flat;
 +    wchar_t **argv_w;
 +    int i, buffsize = 0, offset = 0;
 +
 +    if (win32_argv_utf8) {
 +        *argc_ptr = win32_argc;
 +        *argv_ptr = win32_argv_utf8;
 +        return;
 +    }
 +
 +    win32_argc = 0;
 +    argv_w = CommandLineToArgvW(GetCommandLineW(), &win32_argc);
 +    if (win32_argc <= 0 || !argv_w)
 +        return;
 +
 +    /* determine the UTF-8 buffer size (including NULL-termination symbols) */
 +    for (i = 0; i < win32_argc; i++)
 +        buffsize += WideCharToMultiByte(CP_UTF8, 0, argv_w[i], -1,
 +                                        NULL, 0, NULL, NULL);
 +
 +    win32_argv_utf8 = av_mallocz(sizeof(char *) * (win32_argc + 1) + buffsize);
 +    argstr_flat     = (char *)win32_argv_utf8 + sizeof(char *) * (win32_argc + 1);
 +    if (!win32_argv_utf8) {
 +        LocalFree(argv_w);
 +        return;
 +    }
 +
 +    for (i = 0; i < win32_argc; i++) {
 +        win32_argv_utf8[i] = &argstr_flat[offset];
 +        offset += WideCharToMultiByte(CP_UTF8, 0, argv_w[i], -1,
 +                                      &argstr_flat[offset],
 +                                      buffsize - offset, NULL, NULL);
 +    }
 +    win32_argv_utf8[i] = NULL;
 +    LocalFree(argv_w);
 +
 +    *argc_ptr = win32_argc;
 +    *argv_ptr = win32_argv_utf8;
 +}
 +#else
 +static inline void prepare_app_arguments(int *argc_ptr, char ***argv_ptr)
 +{
 +    /* nothing to do */
 +}
 +#endif /* HAVE_COMMANDLINETOARGVW */
 +
 +static int write_option(void *optctx, const OptionDef *po, const char *opt,
 +                        const char *arg)
 +{
 +    /* new-style options contain an offset into optctx, old-style address of
 +     * a global var*/
 +    void *dst = po->flags & (OPT_OFFSET | OPT_SPEC) ?
 +                (uint8_t *)optctx + po->u.off : po->u.dst_ptr;
 +    int *dstcount;
 +
 +    if (po->flags & OPT_SPEC) {
 +        SpecifierOpt **so = dst;
 +        char *p = strchr(opt, ':');
 +        char *str;
 +
 +        dstcount = (int *)(so + 1);
 +        *so = grow_array(*so, sizeof(**so), dstcount, *dstcount + 1);
 +        str = av_strdup(p ? p + 1 : "");
 +        if (!str)
 +            return AVERROR(ENOMEM);
 +        (*so)[*dstcount - 1].specifier = str;
 +        dst = &(*so)[*dstcount - 1].u;
 +    }
 +
 +    if (po->flags & OPT_STRING) {
 +        char *str;
 +        str = av_strdup(arg);
 +        av_freep(dst);
 +        if (!str)
 +            return AVERROR(ENOMEM);
 +        *(char **)dst = str;
 +    } else if (po->flags & OPT_BOOL || po->flags & OPT_INT) {
 +        *(int *)dst = parse_number_or_die(opt, arg, OPT_INT64, INT_MIN, INT_MAX);
 +    } else if (po->flags & OPT_INT64) {
 +        *(int64_t *)dst = parse_number_or_die(opt, arg, OPT_INT64, INT64_MIN, INT64_MAX);
 +    } else if (po->flags & OPT_TIME) {
 +        *(int64_t *)dst = parse_time_or_die(opt, arg, 1);
 +    } else if (po->flags & OPT_FLOAT) {
 +        *(float *)dst = parse_number_or_die(opt, arg, OPT_FLOAT, -INFINITY, INFINITY);
 +    } else if (po->flags & OPT_DOUBLE) {
 +        *(double *)dst = parse_number_or_die(opt, arg, OPT_DOUBLE, -INFINITY, INFINITY);
 +    } else if (po->u.func_arg) {
 +        int ret = po->u.func_arg(optctx, opt, arg);
 +        if (ret < 0) {
 +            av_log(NULL, AV_LOG_ERROR,
 +                   "Failed to set value '%s' for option '%s': %s\n",
 +                   arg, opt, av_err2str(ret));
 +            return ret;
 +        }
 +    }
 +    if (po->flags & OPT_EXIT)
 +        exit_program(0);
 +
 +    return 0;
 +}
 +
 +int parse_option(void *optctx, const char *opt, const char *arg,
 +                 const OptionDef *options)
 +{
 +    const OptionDef *po;
 +    int ret;
 +
 +    po = find_option(options, opt);
 +    if (!po->name && opt[0] == 'n' && opt[1] == 'o') {
 +        /* handle 'no' bool option */
 +        po = find_option(options, opt + 2);
 +        if ((po->name && (po->flags & OPT_BOOL)))
 +            arg = "0";
 +    } else if (po->flags & OPT_BOOL)
 +        arg = "1";
 +
 +    if (!po->name)
 +        po = find_option(options, "default");
 +    if (!po->name) {
 +        av_log(NULL, AV_LOG_ERROR, "Unrecognized option '%s'\n", opt);
 +        return AVERROR(EINVAL);
 +    }
 +    if (po->flags & HAS_ARG && !arg) {
 +        av_log(NULL, AV_LOG_ERROR, "Missing argument for option '%s'\n", opt);
 +        return AVERROR(EINVAL);
 +    }
 +
 +    ret = write_option(optctx, po, opt, arg);
 +    if (ret < 0)
 +        return ret;
 +
 +    return !!(po->flags & HAS_ARG);
 +}
 +
 +void parse_options(void *optctx, int argc, char **argv, const OptionDef *options,
 +                   void (*parse_arg_function)(void *, const char*))
 +{
 +    const char *opt;
 +    int optindex, handleoptions = 1, ret;
 +
 +    /* perform system-dependent conversions for arguments list */
 +    prepare_app_arguments(&argc, &argv);
 +
 +    /* parse options */
 +    optindex = 1;
 +    while (optindex < argc) {
 +        opt = argv[optindex++];
 +
 +        if (handleoptions && opt[0] == '-' && opt[1] != '\0') {
 +            if (opt[1] == '-' && opt[2] == '\0') {
 +                handleoptions = 0;
 +                continue;
 +            }
 +            opt++;
 +
 +            if ((ret = parse_option(optctx, opt, argv[optindex], options)) < 0)
 +                exit_program(1);
 +            optindex += ret;
 +        } else {
 +            if (parse_arg_function)
 +                parse_arg_function(optctx, opt);
 +        }
 +    }
 +}
 +
 +int parse_optgroup(void *optctx, OptionGroup *g)
 +{
 +    int i, ret;
 +
 +    av_log(NULL, AV_LOG_DEBUG, "Parsing a group of options: %s %s.\n",
 +           g->group_def->name, g->arg);
 +
 +    for (i = 0; i < g->nb_opts; i++) {
 +        Option *o = &g->opts[i];
 +
 +        if (g->group_def->flags &&
 +            !(g->group_def->flags & o->opt->flags)) {
 +            av_log(NULL, AV_LOG_ERROR, "Option %s (%s) cannot be applied to "
 +                   "%s %s -- you are trying to apply an input option to an "
 +                   "output file or vice versa. Move this option before the "
 +                   "file it belongs to.\n", o->key, o->opt->help,
 +                   g->group_def->name, g->arg);
 +            return AVERROR(EINVAL);
 +        }
 +
 +        av_log(NULL, AV_LOG_DEBUG, "Applying option %s (%s) with argument %s.\n",
 +               o->key, o->opt->help, o->val);
 +
 +        ret = write_option(optctx, o->opt, o->key, o->val);
 +        if (ret < 0)
 +            return ret;
 +    }
 +
 +    av_log(NULL, AV_LOG_DEBUG, "Successfully parsed a group of options.\n");
 +
 +    return 0;
 +}
 +
 +int locate_option(int argc, char **argv, const OptionDef *options,
 +                  const char *optname)
 +{
 +    const OptionDef *po;
 +    int i;
 +
 +    for (i = 1; i < argc; i++) {
 +        const char *cur_opt = argv[i];
 +
 +        if (*cur_opt++ != '-')
 +            continue;
 +
 +        po = find_option(options, cur_opt);
 +        if (!po->name && cur_opt[0] == 'n' && cur_opt[1] == 'o')
 +            po = find_option(options, cur_opt + 2);
 +
 +        if ((!po->name && !strcmp(cur_opt, optname)) ||
 +             (po->name && !strcmp(optname, po->name)))
 +            return i;
 +
 +        if (!po->name || po->flags & HAS_ARG)
 +            i++;
 +    }
 +    return 0;
 +}
 +
 +static void dump_argument(const char *a)
 +{
 +    const unsigned char *p;
 +
 +    for (p = a; *p; p++)
 +        if (!((*p >= '+' && *p <= ':') || (*p >= '@' && *p <= 'Z') ||
 +              *p == '_' || (*p >= 'a' && *p <= 'z')))
 +            break;
 +    if (!*p) {
 +        fputs(a, report_file);
 +        return;
 +    }
 +    fputc('"', report_file);
 +    for (p = a; *p; p++) {
 +        if (*p == '\\' || *p == '"' || *p == '$' || *p == '`')
 +            fprintf(report_file, "\\%c", *p);
 +        else if (*p < ' ' || *p > '~')
 +            fprintf(report_file, "\\x%02x", *p);
 +        else
 +            fputc(*p, report_file);
 +    }
 +    fputc('"', report_file);
 +}
 +
 +static void check_options(const OptionDef *po)
 +{
 +    while (po->name) {
 +        if (po->flags & OPT_PERFILE)
 +            av_assert0(po->flags & (OPT_INPUT | OPT_OUTPUT));
 +        po++;
 +    }
 +}
 +
 +void parse_loglevel(int argc, char **argv, const OptionDef *options)
 +{
 +    int idx = locate_option(argc, argv, options, "loglevel");
 +    const char *env;
 +
 +    check_options(options);
 +
 +    if (!idx)
 +        idx = locate_option(argc, argv, options, "v");
 +    if (idx && argv[idx + 1])
 +        opt_loglevel(NULL, "loglevel", argv[idx + 1]);
 +    idx = locate_option(argc, argv, options, "report");
 +    if ((env = getenv("FFREPORT")) || idx) {
 +        init_report(env);
 +        if (report_file) {
 +            int i;
 +            fprintf(report_file, "Command line:\n");
 +            for (i = 0; i < argc; i++) {
 +                dump_argument(argv[i]);
 +                fputc(i < argc - 1 ? ' ' : '\n', report_file);
 +            }
 +            fflush(report_file);
 +        }
 +    }
 +    idx = locate_option(argc, argv, options, "hide_banner");
 +    if (idx)
 +        hide_banner = 1;
 +}
 +
 +static const AVOption *opt_find(void *obj, const char *name, const char *unit,
 +                            int opt_flags, int search_flags)
 +{
 +    const AVOption *o = av_opt_find(obj, name, unit, opt_flags, search_flags);
 +    if(o && !o->flags)
 +        return NULL;
 +    return o;
 +}
 +
 +#define FLAGS (o->type == AV_OPT_TYPE_FLAGS && (arg[0]=='-' || arg[0]=='+')) ? AV_DICT_APPEND : 0
 +int opt_default(void *optctx, const char *opt, const char *arg)
 +{
 +    const AVOption *o;
 +    int consumed = 0;
 +    char opt_stripped[128];
 +    const char *p;
 +    const AVClass *cc = avcodec_get_class(), *fc = avformat_get_class();
 +#if CONFIG_AVRESAMPLE
 +    const AVClass *rc = avresample_get_class();
 +#endif
 +#if CONFIG_SWSCALE
 +    const AVClass *sc = sws_get_class();
 +#endif
 +#if CONFIG_SWRESAMPLE
 +    const AVClass *swr_class = swr_get_class();
 +#endif
 +
 +    if (!strcmp(opt, "debug") || !strcmp(opt, "fdebug"))
 +        av_log_set_level(AV_LOG_DEBUG);
 +
 +    if (!(p = strchr(opt, ':')))
 +        p = opt + strlen(opt);
 +    av_strlcpy(opt_stripped, opt, FFMIN(sizeof(opt_stripped), p - opt + 1));
 +
 +    if ((o = opt_find(&cc, opt_stripped, NULL, 0,
 +                         AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)) ||
 +        ((opt[0] == 'v' || opt[0] == 'a' || opt[0] == 's') &&
 +         (o = opt_find(&cc, opt + 1, NULL, 0, AV_OPT_SEARCH_FAKE_OBJ)))) {
 +        av_dict_set(&codec_opts, opt, arg, FLAGS);
 +        consumed = 1;
 +    }
 +    if ((o = opt_find(&fc, opt, NULL, 0,
 +                         AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ))) {
 +        av_dict_set(&format_opts, opt, arg, FLAGS);
 +        if (consumed)
 +            av_log(NULL, AV_LOG_VERBOSE, "Routing option %s to both codec and muxer layer\n", opt);
 +        consumed = 1;
 +    }
 +#if CONFIG_SWSCALE
 +    if (!consumed && (o = opt_find(&sc, opt, NULL, 0,
 +                         AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ))) {
 +        struct SwsContext *sws = sws_alloc_context();
 +        int ret = av_opt_set(sws, opt, arg, 0);
 +        sws_freeContext(sws);
 +        if (!strcmp(opt, "srcw") || !strcmp(opt, "srch") ||
 +            !strcmp(opt, "dstw") || !strcmp(opt, "dsth") ||
 +            !strcmp(opt, "src_format") || !strcmp(opt, "dst_format")) {
 +            av_log(NULL, AV_LOG_ERROR, "Directly using swscale dimensions/format options is not supported, please use the -s or -pix_fmt options\n");
 +            return AVERROR(EINVAL);
 +        }
 +        if (ret < 0) {
 +            av_log(NULL, AV_LOG_ERROR, "Error setting option %s.\n", opt);
 +            return ret;
 +        }
 +
 +        av_dict_set(&sws_dict, opt, arg, FLAGS);
 +
 +        consumed = 1;
 +    }
 +#else
 +    if (!consumed && !strcmp(opt, "sws_flags")) {
 +        av_log(NULL, AV_LOG_WARNING, "Ignoring %s %s, due to disabled swscale\n", opt, arg);
 +        consumed = 1;
 +    }
 +#endif
 +#if CONFIG_SWRESAMPLE
 +    if (!consumed && (o=opt_find(&swr_class, opt, NULL, 0,
 +                                    AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ))) {
 +        struct SwrContext *swr = swr_alloc();
 +        int ret = av_opt_set(swr, opt, arg, 0);
 +        swr_free(&swr);
 +        if (ret < 0) {
 +            av_log(NULL, AV_LOG_ERROR, "Error setting option %s.\n", opt);
 +            return ret;
 +        }
 +        av_dict_set(&swr_opts, opt, arg, FLAGS);
 +        consumed = 1;
 +    }
 +#endif
 +#if CONFIG_AVRESAMPLE
 +    if ((o=opt_find(&rc, opt, NULL, 0,
 +                       AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ))) {
 +        av_dict_set(&resample_opts, opt, arg, FLAGS);
 +        consumed = 1;
 +    }
 +#endif
 +
 +    if (consumed)
 +        return 0;
 +    return AVERROR_OPTION_NOT_FOUND;
 +}
 +
 +/*
 + * Check whether given option is a group separator.
 + *
 + * @return index of the group definition that matched or -1 if none
 + */
 +static int match_group_separator(const OptionGroupDef *groups, int nb_groups,
 +                                 const char *opt)
 +{
 +    int i;
 +
 +    for (i = 0; i < nb_groups; i++) {
 +        const OptionGroupDef *p = &groups[i];
 +        if (p->sep && !strcmp(p->sep, opt))
 +            return i;
 +    }
 +
 +    return -1;
 +}
 +
 +/*
 + * Finish parsing an option group.
 + *
 + * @param group_idx which group definition should this group belong to
 + * @param arg argument of the group delimiting option
 + */
 +static void finish_group(OptionParseContext *octx, int group_idx,
 +                         const char *arg)
 +{
 +    OptionGroupList *l = &octx->groups[group_idx];
 +    OptionGroup *g;
 +
 +    GROW_ARRAY(l->groups, l->nb_groups);
 +    g = &l->groups[l->nb_groups - 1];
 +
 +    *g             = octx->cur_group;
 +    g->arg         = arg;
 +    g->group_def   = l->group_def;
 +    g->sws_dict    = sws_dict;
 +    g->swr_opts    = swr_opts;
 +    g->codec_opts  = codec_opts;
 +    g->format_opts = format_opts;
 +    g->resample_opts = resample_opts;
 +
 +    codec_opts  = NULL;
 +    format_opts = NULL;
 +    resample_opts = NULL;
 +    sws_dict    = NULL;
 +    swr_opts    = NULL;
 +    init_opts();
 +
 +    memset(&octx->cur_group, 0, sizeof(octx->cur_group));
 +}
 +
 +/*
 + * Add an option instance to currently parsed group.
 + */
 +static void add_opt(OptionParseContext *octx, const OptionDef *opt,
 +                    const char *key, const char *val)
 +{
 +    int global = !(opt->flags & (OPT_PERFILE | OPT_SPEC | OPT_OFFSET));
 +    OptionGroup *g = global ? &octx->global_opts : &octx->cur_group;
 +
 +    GROW_ARRAY(g->opts, g->nb_opts);
 +    g->opts[g->nb_opts - 1].opt = opt;
 +    g->opts[g->nb_opts - 1].key = key;
 +    g->opts[g->nb_opts - 1].val = val;
 +}
 +
 +static void init_parse_context(OptionParseContext *octx,
 +                               const OptionGroupDef *groups, int nb_groups)
 +{
 +    static const OptionGroupDef global_group = { "global" };
 +    int i;
 +
 +    memset(octx, 0, sizeof(*octx));
 +
 +    octx->nb_groups = nb_groups;
 +    octx->groups    = av_mallocz_array(octx->nb_groups, sizeof(*octx->groups));
 +    if (!octx->groups)
 +        exit_program(1);
 +
 +    for (i = 0; i < octx->nb_groups; i++)
 +        octx->groups[i].group_def = &groups[i];
 +
 +    octx->global_opts.group_def = &global_group;
 +    octx->global_opts.arg       = "";
 +
 +    init_opts();
 +}
 +
 +void uninit_parse_context(OptionParseContext *octx)
 +{
 +    int i, j;
 +
 +    for (i = 0; i < octx->nb_groups; i++) {
 +        OptionGroupList *l = &octx->groups[i];
 +
 +        for (j = 0; j < l->nb_groups; j++) {
 +            av_freep(&l->groups[j].opts);
 +            av_dict_free(&l->groups[j].codec_opts);
 +            av_dict_free(&l->groups[j].format_opts);
 +            av_dict_free(&l->groups[j].resample_opts);
 +
 +            av_dict_free(&l->groups[j].sws_dict);
 +            av_dict_free(&l->groups[j].swr_opts);
 +        }
 +        av_freep(&l->groups);
 +    }
 +    av_freep(&octx->groups);
 +
 +    av_freep(&octx->cur_group.opts);
 +    av_freep(&octx->global_opts.opts);
 +
 +    uninit_opts();
 +}
 +
 +int split_commandline(OptionParseContext *octx, int argc, char *argv[],
 +                      const OptionDef *options,
 +                      const OptionGroupDef *groups, int nb_groups)
 +{
 +    int optindex = 1;
 +    int dashdash = -2;
 +
 +    /* perform system-dependent conversions for arguments list */
 +    prepare_app_arguments(&argc, &argv);
 +
 +    init_parse_context(octx, groups, nb_groups);
 +    av_log(NULL, AV_LOG_DEBUG, "Splitting the commandline.\n");
 +
 +    while (optindex < argc) {
 +        const char *opt = argv[optindex++], *arg;
 +        const OptionDef *po;
 +        int ret;
 +
 +        av_log(NULL, AV_LOG_DEBUG, "Reading option '%s' ...", opt);
 +
 +        if (opt[0] == '-' && opt[1] == '-' && !opt[2]) {
 +            dashdash = optindex;
 +            continue;
 +        }
 +        /* unnamed group separators, e.g. output filename */
 +        if (opt[0] != '-' || !opt[1] || dashdash+1 == optindex) {
 +            finish_group(octx, 0, opt);
 +            av_log(NULL, AV_LOG_DEBUG, " matched as %s.\n", groups[0].name);
 +            continue;
 +        }
 +        opt++;
 +
 +#define GET_ARG(arg)                                                           \
 +do {                                                                           \
 +    arg = argv[optindex++];                                                    \
 +    if (!arg) {                                                                \
 +        av_log(NULL, AV_LOG_ERROR, "Missing argument for option '%s'.\n", opt);\
 +        return AVERROR(EINVAL);                                                \
 +    }                                                                          \
 +} while (0)
 +
 +        /* named group separators, e.g. -i */
 +        if ((ret = match_group_separator(groups, nb_groups, opt)) >= 0) {
 +            GET_ARG(arg);
 +            finish_group(octx, ret, arg);
 +            av_log(NULL, AV_LOG_DEBUG, " matched as %s with argument '%s'.\n",
 +                   groups[ret].name, arg);
 +            continue;
 +        }
 +
 +        /* normal options */
 +        po = find_option(options, opt);
 +        if (po->name) {
 +            if (po->flags & OPT_EXIT) {
 +                /* optional argument, e.g. -h */
 +                arg = argv[optindex++];
 +            } else if (po->flags & HAS_ARG) {
 +                GET_ARG(arg);
 +            } else {
 +                arg = "1";
 +            }
 +
 +            add_opt(octx, po, opt, arg);
 +            av_log(NULL, AV_LOG_DEBUG, " matched as option '%s' (%s) with "
 +                   "argument '%s'.\n", po->name, po->help, arg);
 +            continue;
 +        }
 +
 +        /* AVOptions */
 +        if (argv[optindex]) {
 +            ret = opt_default(NULL, opt, argv[optindex]);
 +            if (ret >= 0) {
 +                av_log(NULL, AV_LOG_DEBUG, " matched as AVOption '%s' with "
 +                       "argument '%s'.\n", opt, argv[optindex]);
 +                optindex++;
 +                continue;
 +            } else if (ret != AVERROR_OPTION_NOT_FOUND) {
 +                av_log(NULL, AV_LOG_ERROR, "Error parsing option '%s' "
 +                       "with argument '%s'.\n", opt, argv[optindex]);
 +                return ret;
 +            }
 +        }
 +
 +        /* boolean -nofoo options */
 +        if (opt[0] == 'n' && opt[1] == 'o' &&
 +            (po = find_option(options, opt + 2)) &&
 +            po->name && po->flags & OPT_BOOL) {
 +            add_opt(octx, po, opt, "0");
 +            av_log(NULL, AV_LOG_DEBUG, " matched as option '%s' (%s) with "
 +                   "argument 0.\n", po->name, po->help);
 +            continue;
 +        }
 +
 +        av_log(NULL, AV_LOG_ERROR, "Unrecognized option '%s'.\n", opt);
 +        return AVERROR_OPTION_NOT_FOUND;
 +    }
 +
 +    if (octx->cur_group.nb_opts || codec_opts || format_opts || resample_opts)
 +        av_log(NULL, AV_LOG_WARNING, "Trailing options were found on the "
 +               "commandline.\n");
 +
 +    av_log(NULL, AV_LOG_DEBUG, "Finished splitting the commandline.\n");
 +
 +    return 0;
 +}
 +
 +int opt_cpuflags(void *optctx, const char *opt, const char *arg)
 +{
 +    int ret;
 +    unsigned flags = av_get_cpu_flags();
 +
 +    if ((ret = av_parse_cpu_caps(&flags, arg)) < 0)
 +        return ret;
 +
 +    av_force_cpu_flags(flags);
 +    return 0;
 +}
 +
 +int opt_loglevel(void *optctx, const char *opt, const char *arg)
 +{
 +    const struct { const char *name; int level; } log_levels[] = {
 +        { "quiet"  , AV_LOG_QUIET   },
 +        { "panic"  , AV_LOG_PANIC   },
 +        { "fatal"  , AV_LOG_FATAL   },
 +        { "error"  , AV_LOG_ERROR   },
 +        { "warning", AV_LOG_WARNING },
 +        { "info"   , AV_LOG_INFO    },
 +        { "verbose", AV_LOG_VERBOSE },
 +        { "debug"  , AV_LOG_DEBUG   },
 +        { "trace"  , AV_LOG_TRACE   },
 +    };
 +    char *tail;
 +    int level;
 +    int flags;
 +    int i;
 +
 +    flags = av_log_get_flags();
 +    tail = strstr(arg, "repeat");
 +    if (tail)
 +        flags &= ~AV_LOG_SKIP_REPEATED;
 +    else
 +        flags |= AV_LOG_SKIP_REPEATED;
 +
 +    av_log_set_flags(flags);
 +    if (tail == arg)
 +        arg += 6 + (arg[6]=='+');
 +    if(tail && !*arg)
 +        return 0;
 +
 +    for (i = 0; i < FF_ARRAY_ELEMS(log_levels); i++) {
 +        if (!strcmp(log_levels[i].name, arg)) {
 +            av_log_set_level(log_levels[i].level);
 +            return 0;
 +        }
 +    }
 +
 +    level = strtol(arg, &tail, 10);
 +    if (*tail) {
 +        av_log(NULL, AV_LOG_FATAL, "Invalid loglevel \"%s\". "
 +               "Possible levels are numbers or:\n", arg);
 +        for (i = 0; i < FF_ARRAY_ELEMS(log_levels); i++)
 +            av_log(NULL, AV_LOG_FATAL, "\"%s\"\n", log_levels[i].name);
 +        exit_program(1);
 +    }
 +    av_log_set_level(level);
 +    return 0;
 +}
 +
 +static void expand_filename_template(AVBPrint *bp, const char *template,
 +                                     struct tm *tm)
 +{
 +    int c;
 +
 +    while ((c = *(template++))) {
 +        if (c == '%') {
 +            if (!(c = *(template++)))
 +                break;
 +            switch (c) {
 +            case 'p':
 +                av_bprintf(bp, "%s", program_name);
 +                break;
 +            case 't':
 +                av_bprintf(bp, "%04d%02d%02d-%02d%02d%02d",
 +                           tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
 +                           tm->tm_hour, tm->tm_min, tm->tm_sec);
 +                break;
 +            case '%':
 +                av_bprint_chars(bp, c, 1);
 +                break;
 +            }
 +        } else {
 +            av_bprint_chars(bp, c, 1);
 +        }
 +    }
 +}
 +
 +static int init_report(const char *env)
 +{
 +    char *filename_template = NULL;
 +    char *key, *val;
 +    int ret, count = 0;
 +    time_t now;
 +    struct tm *tm;
 +    AVBPrint filename;
 +
 +    if (report_file) /* already opened */
 +        return 0;
 +    time(&now);
 +    tm = localtime(&now);
 +
 +    while (env && *env) {
 +        if ((ret = av_opt_get_key_value(&env, "=", ":", 0, &key, &val)) < 0) {
 +            if (count)
 +                av_log(NULL, AV_LOG_ERROR,
 +                       "Failed to parse FFREPORT environment variable: %s\n",
 +                       av_err2str(ret));
 +            break;
 +        }
 +        if (*env)
 +            env++;
 +        count++;
 +        if (!strcmp(key, "file")) {
 +            av_free(filename_template);
 +            filename_template = val;
 +            val = NULL;
 +        } else if (!strcmp(key, "level")) {
 +            char *tail;
 +            report_file_level = strtol(val, &tail, 10);
 +            if (*tail) {
 +                av_log(NULL, AV_LOG_FATAL, "Invalid report file level\n");
 +                exit_program(1);
 +            }
 +        } else {
 +            av_log(NULL, AV_LOG_ERROR, "Unknown key '%s' in FFREPORT\n", key);
 +        }
 +        av_free(val);
 +        av_free(key);
 +    }
 +
 +    av_bprint_init(&filename, 0, 1);
 +    expand_filename_template(&filename,
 +                             av_x_if_null(filename_template, "%p-%t.log"), tm);
 +    av_free(filename_template);
 +    if (!av_bprint_is_complete(&filename)) {
 +        av_log(NULL, AV_LOG_ERROR, "Out of memory building report file name\n");
 +        return AVERROR(ENOMEM);
 +    }
 +
 +    report_file = fopen(filename.str, "w");
 +    if (!report_file) {
 +        int ret = AVERROR(errno);
 +        av_log(NULL, AV_LOG_ERROR, "Failed to open report \"%s\": %s\n",
 +               filename.str, strerror(errno));
 +        return ret;
 +    }
 +    av_log_set_callback(log_callback_report);
 +    av_log(NULL, AV_LOG_INFO,
 +           "%s started on %04d-%02d-%02d at %02d:%02d:%02d\n"
 +           "Report written to \"%s\"\n",
 +           program_name,
 +           tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
 +           tm->tm_hour, tm->tm_min, tm->tm_sec,
 +           filename.str);
 +    av_bprint_finalize(&filename, NULL);
 +    return 0;
 +}
 +
 +int opt_report(const char *opt)
 +{
 +    return init_report(NULL);
 +}
 +
 +int opt_max_alloc(void *optctx, const char *opt, const char *arg)
 +{
 +    char *tail;
 +    size_t max;
 +
 +    max = strtol(arg, &tail, 10);
 +    if (*tail) {
 +        av_log(NULL, AV_LOG_FATAL, "Invalid max_alloc \"%s\".\n", arg);
 +        exit_program(1);
 +    }
 +    av_max_alloc(max);
 +    return 0;
 +}
 +
 +int opt_timelimit(void *optctx, const char *opt, const char *arg)
 +{
 +#if HAVE_SETRLIMIT
 +    int lim = parse_number_or_die(opt, arg, OPT_INT64, 0, INT_MAX);
 +    struct rlimit rl = { lim, lim + 1 };
 +    if (setrlimit(RLIMIT_CPU, &rl))
 +        perror("setrlimit");
 +#else
 +    av_log(NULL, AV_LOG_WARNING, "-%s not implemented on this OS\n", opt);
 +#endif
 +    return 0;
 +}
 +
 +void print_error(const char *filename, int err)
 +{
 +    char errbuf[128];
 +    const char *errbuf_ptr = errbuf;
 +
 +    if (av_strerror(err, errbuf, sizeof(errbuf)) < 0)
 +        errbuf_ptr = strerror(AVUNERROR(err));
 +    av_log(NULL, AV_LOG_ERROR, "%s: %s\n", filename, errbuf_ptr);
 +}
 +
 +static int warned_cfg = 0;
 +
 +#define INDENT        1
 +#define SHOW_VERSION  2
 +#define SHOW_CONFIG   4
 +#define SHOW_COPYRIGHT 8
 +
 +#define PRINT_LIB_INFO(libname, LIBNAME, flags, level)                  \
 +    if (CONFIG_##LIBNAME) {                                             \
 +        const char *indent = flags & INDENT? "  " : "";                 \
 +        if (flags & SHOW_VERSION) {                                     \
 +            unsigned int version = libname##_version();                 \
 +            av_log(NULL, level,                                         \
 +                   "%slib%-11s %2d.%3d.%3d / %2d.%3d.%3d\n",            \
 +                   indent, #libname,                                    \
 +                   LIB##LIBNAME##_VERSION_MAJOR,                        \
 +                   LIB##LIBNAME##_VERSION_MINOR,                        \
 +                   LIB##LIBNAME##_VERSION_MICRO,                        \
 +                   AV_VERSION_MAJOR(version), AV_VERSION_MINOR(version),\
 +                   AV_VERSION_MICRO(version));                          \
 +        }                                                               \
 +        if (flags & SHOW_CONFIG) {                                      \
 +            const char *cfg = libname##_configuration();                \
 +            if (strcmp(FFMPEG_CONFIGURATION, cfg)) {                    \
 +                if (!warned_cfg) {                                      \
 +                    av_log(NULL, level,                                 \
 +                            "%sWARNING: library configuration mismatch\n", \
 +                            indent);                                    \
 +                    warned_cfg = 1;                                     \
 +                }                                                       \
 +                av_log(NULL, level, "%s%-11s configuration: %s\n",      \
 +                        indent, #libname, cfg);                         \
 +            }                                                           \
 +        }                                                               \
 +    }                                                                   \
 +
 +static void print_all_libs_info(int flags, int level)
 +{
 +    PRINT_LIB_INFO(avutil,     AVUTIL,     flags, level);
 +    PRINT_LIB_INFO(avcodec,    AVCODEC,    flags, level);
 +    PRINT_LIB_INFO(avformat,   AVFORMAT,   flags, level);
 +    PRINT_LIB_INFO(avdevice,   AVDEVICE,   flags, level);
 +    PRINT_LIB_INFO(avfilter,   AVFILTER,   flags, level);
 +    PRINT_LIB_INFO(avresample, AVRESAMPLE, flags, level);
 +    PRINT_LIB_INFO(swscale,    SWSCALE,    flags, level);
 +    PRINT_LIB_INFO(swresample, SWRESAMPLE, flags, level);
 +    PRINT_LIB_INFO(postproc,   POSTPROC,   flags, level);
 +}
 +
 +static void print_program_info(int flags, int level)
 +{
 +    const char *indent = flags & INDENT? "  " : "";
 +
 +    av_log(NULL, level, "%s version " FFMPEG_VERSION, program_name);
 +    if (flags & SHOW_COPYRIGHT)
 +        av_log(NULL, level, " Copyright (c) %d-%d the FFmpeg developers",
 +               program_birth_year, CONFIG_THIS_YEAR);
 +    av_log(NULL, level, "\n");
 +    av_log(NULL, level, "%sbuilt with %s\n", indent, CC_IDENT);
 +
 +    av_log(NULL, level, "%sconfiguration: " FFMPEG_CONFIGURATION "\n", indent);
 +}
 +
 +static void print_buildconf(int flags, int level)
 +{
 +    const char *indent = flags & INDENT ? "  " : "";
 +    char str[] = { FFMPEG_CONFIGURATION };
 +    char *conflist, *remove_tilde, *splitconf;
 +
 +    // Change all the ' --' strings to '~--' so that
 +    // they can be identified as tokens.
 +    while ((conflist = strstr(str, " --")) != NULL) {
 +        strncpy(conflist, "~--", 3);
 +    }
 +
 +    // Compensate for the weirdness this would cause
 +    // when passing 'pkg-config --static'.
 +    while ((remove_tilde = strstr(str, "pkg-config~")) != NULL) {
 +        strncpy(remove_tilde, "pkg-config ", 11);
 +    }
 +
 +    splitconf = strtok(str, "~");
 +    av_log(NULL, level, "\n%sconfiguration:\n", indent);
 +    while (splitconf != NULL) {
 +        av_log(NULL, level, "%s%s%s\n", indent, indent, splitconf);
 +        splitconf = strtok(NULL, "~");
 +    }
 +}
 +
 +void show_banner(int argc, char **argv, const OptionDef *options)
 +{
 +    int idx = locate_option(argc, argv, options, "version");
 +    if (hide_banner || idx)
 +        return;
 +
 +    print_program_info (INDENT|SHOW_COPYRIGHT, AV_LOG_INFO);
 +    print_all_libs_info(INDENT|SHOW_CONFIG,  AV_LOG_INFO);
 +    print_all_libs_info(INDENT|SHOW_VERSION, AV_LOG_INFO);
 +}
 +
 +int show_version(void *optctx, const char *opt, const char *arg)
 +{
 +    av_log_set_callback(log_callback_help);
 +    print_program_info (SHOW_COPYRIGHT, AV_LOG_INFO);
 +    print_all_libs_info(SHOW_VERSION, AV_LOG_INFO);
 +
 +    return 0;
 +}
 +
 +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;
 +}
 +
 +int show_license(void *optctx, const char *opt, const char *arg)
 +{
 +#if CONFIG_NONFREE
 +    printf(
 +    "This version of %s has nonfree parts compiled in.\n"
 +    "Therefore it is not legally redistributable.\n",
 +    program_name );
 +#elif CONFIG_GPLV3
 +    printf(
 +    "%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",
 +    program_name, program_name, program_name );
 +#elif CONFIG_GPL
 +    printf(
 +    "%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 2 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, write to the Free Software\n"
 +    "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n",
 +    program_name, program_name, program_name );
 +#elif CONFIG_LGPLV3
 +    printf(
 +    "%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",
 +    program_name, program_name, program_name );
 +#else
 +    printf(
 +    "%s is free software; you can redistribute it and/or\n"
 +    "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"
 +    "%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 GNU\n"
 +    "Lesser General Public License for more details.\n"
 +    "\n"
 +    "You should have received a copy of the GNU Lesser General Public\n"
 +    "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",
 +    program_name, program_name, program_name );
 +#endif
 +
 +    return 0;
 +}
 +
 +static int is_device(const AVClass *avclass)
 +{
 +    if (!avclass)
 +        return 0;
 +    return AV_IS_INPUT_DEVICE(avclass->category) || AV_IS_OUTPUT_DEVICE(avclass->category);
 +}
 +
 +static int show_formats_devices(void *optctx, const char *opt, const char *arg, int device_only, int muxdemuxers)
 +{
 +    AVInputFormat *ifmt  = NULL;
 +    AVOutputFormat *ofmt = NULL;
 +    const char *last_name;
 +    int is_dev;
 +
 +    printf("%s\n"
 +           " D. = Demuxing supported\n"
 +           " .E = Muxing supported\n"
 +           " --\n", device_only ? "Devices:" : "File formats:");
 +    last_name = "000";
 +    for (;;) {
 +        int decode = 0;
 +        int encode = 0;
 +        const char *name      = NULL;
 +        const char *long_name = NULL;
 +
 +        if (muxdemuxers !=SHOW_DEMUXERS) {
 +            while ((ofmt = av_oformat_next(ofmt))) {
 +                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) {
 +            while ((ifmt = av_iformat_next(ifmt))) {
 +                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;
 +            }
 +        }
 +        if (!name)
 +            break;
 +        last_name = name;
 +
 +        printf(" %s%s %-15s %s\n",
 +               decode ? "D" : " ",
 +               encode ? "E" : " ",
 +               name,
 +            long_name ? long_name:" ");
 +    }
 +    return 0;
 +}
 +
 +int show_formats(void *optctx, const char *opt, const char *arg)
 +{
 +    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);
 +}
 +
 +int show_devices(void *optctx, const char *opt, const char *arg)
 +{
 +    return show_formats_devices(optctx, opt, arg, 1, SHOW_DEFAULT);
 +}
 +
 +#define PRINT_CODEC_SUPPORTED(codec, field, type, list_name, term, get_name) \
 +    if (codec->field) {                                                      \
 +        const type *p = codec->field;                                        \
 +                                                                             \
 +        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 : "");
 +
 +    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)
 +        printf("paramchange ");
 +    if (c->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE)
 +        printf("variable ");
 +    if (c->capabilities & (AV_CODEC_CAP_FRAME_THREADS |
 +                           AV_CODEC_CAP_SLICE_THREADS |
 +                           AV_CODEC_CAP_AUTO_THREADS))
 +        printf("threads ");
 +    if (!c->capabilities)
 +        printf("none");
 +    printf("\n");
 +
 +    if (c->type == AVMEDIA_TYPE_VIDEO ||
 +        c->type == AVMEDIA_TYPE_AUDIO) {
 +        printf("    Threading capabilities: ");
 +        switch (c->capabilities & (AV_CODEC_CAP_FRAME_THREADS |
 +                                   AV_CODEC_CAP_SLICE_THREADS |
 +                                   AV_CODEC_CAP_AUTO_THREADS)) {
 +        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;
 +        case AV_CODEC_CAP_AUTO_THREADS : printf("auto");            break;
 +        default:                         printf("none");            break;
 +        }
 +        printf("\n");
 +    }
 +
 +    if (c->supported_framerates) {
 +        const AVRational *fps = c->supported_framerates;
 +
 +        printf("    Supported framerates:");
 +        while (fps->num) {
 +            printf(" %d/%d", fps->num, fps->den);
 +            fps++;
 +        }
 +        printf("\n");
 +    }
 +    PRINT_CODEC_SUPPORTED(c, pix_fmts, enum AVPixelFormat, "pixel formats",
 +                          AV_PIX_FMT_NONE, GET_PIX_FMT_NAME);
 +    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);
 +    }
 +}
 +
 +static char get_media_type_char(enum AVMediaType type)
 +{
 +    switch (type) {
 +        case AVMEDIA_TYPE_VIDEO:    return 'V';
 +        case AVMEDIA_TYPE_AUDIO:    return 'A';
 +        case AVMEDIA_TYPE_DATA:     return 'D';
 +        case AVMEDIA_TYPE_SUBTITLE: return 'S';
 +        case AVMEDIA_TYPE_ATTACHMENT:return 'T';
 +        default:                    return '?';
 +    }
 +}
 +
 +static const AVCodec *next_codec_for_id(enum AVCodecID id, const AVCodec *prev,
 +                                        int encoder)
 +{
 +    while ((prev = av_codec_next(prev))) {
 +        if (prev->id == id &&
 +            (encoder ? av_codec_is_encoder(prev) : av_codec_is_decoder(prev)))
 +            return prev;
 +    }
 +    return NULL;
 +}
 +
 +static int compare_codec_desc(const void *a, const void *b)
 +{
 +    const AVCodecDescriptor * const *da = a;
 +    const AVCodecDescriptor * const *db = b;
 +
 +    return (*da)->type != (*db)->type ? FFDIFFSIGN((*da)->type, (*db)->type) :
 +           strcmp((*da)->name, (*db)->name);
 +}
 +
 +static unsigned get_codecs_sorted(const AVCodecDescriptor ***rcodecs)
 +{
 +    const AVCodecDescriptor *desc = NULL;
 +    const AVCodecDescriptor **codecs;
 +    unsigned nb_codecs = 0, i = 0;
 +
 +    while ((desc = avcodec_descriptor_next(desc)))
 +        nb_codecs++;
 +    if (!(codecs = av_calloc(nb_codecs, sizeof(*codecs)))) {
 +        av_log(NULL, AV_LOG_ERROR, "Out of memory\n");
 +        exit_program(1);
 +    }
 +    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;
 +}
 +
 +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(")");
 +}
 +
 +int show_codecs(void *optctx, const char *opt, const char *arg)
 +{
 +    const AVCodecDescriptor **codecs;
 +    unsigned i, nb_codecs = get_codecs_sorted(&codecs);
 +
 +    printf("Codecs:\n"
 +           " 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");
 +    for (i = 0; i < nb_codecs; i++) {
 +        const AVCodecDescriptor *desc = codecs[i];
 +        const AVCodec *codec = NULL;
 +
 +        if (strstr(desc->name, "_deprecated"))
 +            continue;
 +
 +        printf(" ");
 +        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" : ".");
 +        printf((desc->props & AV_CODEC_PROP_LOSSY)      ? "L" : ".");
 +        printf((desc->props & AV_CODEC_PROP_LOSSLESS)   ? "S" : ".");
 +
 +        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;
 +            }
 +        }
 +        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;
 +            }
 +        }
 +
 +        printf("\n");
 +    }
 +    av_free(codecs);
 +    return 0;
 +}
 +
 +static void print_codecs(int encoder)
 +{
 +    const AVCodecDescriptor **codecs;
 +    unsigned i, nb_codecs = get_codecs_sorted(&codecs);
 +
 +    printf("%s:\n"
 +           " 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",
 +           encoder ? "Encoders" : "Decoders");
 +    for (i = 0; i < nb_codecs; i++) {
 +        const AVCodecDescriptor *desc = codecs[i];
 +        const AVCodec *codec = NULL;
 +
 +        while ((codec = next_codec_for_id(desc->id, codec, encoder))) {
 +            printf(" %c", get_media_type_char(desc->type));
 +            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" : ".");
 +            printf((codec->capabilities & AV_CODEC_CAP_DRAW_HORIZ_BAND)?"B" : ".");
 +            printf((codec->capabilities & AV_CODEC_CAP_DR1)           ? "D" : ".");
 +
 +            printf(" %-20s %s", codec->name, codec->long_name ? codec->long_name : "");
 +            if (strcmp(codec->name, desc->name))
 +                printf(" (codec %s)", desc->name);
 +
 +            printf("\n");
 +        }
 +    }
 +    av_free(codecs);
 +}
 +
 +int show_decoders(void *optctx, const char *opt, const char *arg)
 +{
 +    print_codecs(0);
 +    return 0;
 +}
 +
 +int show_encoders(void *optctx, const char *opt, const char *arg)
 +{
 +    print_codecs(1);
 +    return 0;
 +}
 +
 +int show_bsfs(void *optctx, const char *opt, const char *arg)
 +{
 +    const AVBitStreamFilter *bsf = NULL;
 +    void *opaque = NULL;
 +
 +    printf("Bitstream filters:\n");
 +    while ((bsf = av_bsf_next(&opaque)))
 +        printf("%s\n", bsf->name);
 +    printf("\n");
 +    return 0;
 +}
 +
 +int show_protocols(void *optctx, const char *opt, const char *arg)
 +{
 +    void *opaque = NULL;
 +    const char *name;
 +
 +    printf("Supported file protocols:\n"
 +           "Input:\n");
 +    while ((name = avio_enum_protocols(&opaque, 0)))
 +        printf("  %s\n", name);
 +    printf("Output:\n");
 +    while ((name = avio_enum_protocols(&opaque, 1)))
 +        printf("  %s\n", name);
 +    return 0;
 +}
 +
 +int show_filters(void *optctx, const char *opt, const char *arg)
 +{
 +#if CONFIG_AVFILTER
 +    const AVFilter *filter = NULL;
 +    char descr[64], *descr_cur;
 +    int i, j;
 +    const AVFilterPad *pad;
 +
 +    printf("Filters:\n"
 +           "  T.. = Timeline support\n"
 +           "  .S. = Slice threading\n"
 +           "  ..C = Command support\n"
 +           "  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");
 +    while ((filter = avfilter_next(filter))) {
 +        descr_cur = descr;
 +        for (i = 0; i < 2; i++) {
 +            if (i) {
 +                *(descr_cur++) = '-';
 +                *(descr_cur++) = '>';
 +            }
 +            pad = i ? filter->outputs : filter->inputs;
 +            for (j = 0; pad && avfilter_pad_get_name(pad, j); j++) {
 +                if (descr_cur >= descr + sizeof(descr) - 4)
 +                    break;
 +                *(descr_cur++) = get_media_type_char(avfilter_pad_get_type(pad, j));
 +            }
 +            if (!j)
 +                *(descr_cur++) = ((!i && (filter->flags & AVFILTER_FLAG_DYNAMIC_INPUTS)) ||
 +                                  ( i && (filter->flags & AVFILTER_FLAG_DYNAMIC_OUTPUTS))) ? 'N' : '|';
 +        }
 +        *descr_cur = 0;
 +        printf(" %c%c%c %-17s %-10s %s\n",
 +               filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE ? 'T' : '.',
 +               filter->flags & AVFILTER_FLAG_SLICE_THREADS    ? 'S' : '.',
 +               filter->process_command                        ? 'C' : '.',
 +               filter->name, descr, filter->description);
 +    }
 +#else
 +    printf("No filters available: libavfilter disabled\n");
 +#endif
 +    return 0;
 +}
 +
 +int show_colors(void *optctx, const char *opt, const char *arg)
 +{
 +    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]);
 +
 +    return 0;
 +}
 +
 +int show_pix_fmts(void *optctx, const char *opt, const char *arg)
 +{
 +    const AVPixFmtDescriptor *pix_desc = NULL;
 +
 +    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");
 +
 +#if !CONFIG_SWSCALE
 +#   define sws_isSupportedInput(x)  0
 +#   define sws_isSupportedOutput(x) 0
 +#endif
 +
 +    while ((pix_desc = av_pix_fmt_desc_next(pix_desc))) {
-         enum AVPixelFormat pix_fmt = av_pix_fmt_desc_get_id(pix_desc);
++        enum AVPixelFormat av_unused pix_fmt = av_pix_fmt_desc_get_id(pix_desc);
 +        printf("%c%c%c%c%c %-16s       %d            %2d\n",
 +               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' : '.',
 +               pix_desc->name,
 +               pix_desc->nb_components,
 +               av_get_bits_per_pixel(pix_desc));
 +    }
 +    return 0;
 +}
 +
 +int show_layouts(void *optctx, const char *opt, const char *arg)
 +{
 +    int i = 0;
 +    uint64_t layout, j;
 +    const char *name, *descr;
 +
 +    printf("Individual channels:\n"
 +           "NAME           DESCRIPTION\n");
 +    for (i = 0; i < 63; i++) {
 +        name = av_get_channel_name((uint64_t)1 << i);
 +        if (!name)
 +            continue;
 +        descr = av_get_channel_description((uint64_t)1 << i);
 +        printf("%-14s %s\n", name, descr);
 +    }
 +    printf("\nStandard channel layouts:\n"
 +           "NAME           DECOMPOSITION\n");
 +    for (i = 0; !av_get_standard_channel_layout(i, &layout, &name); i++) {
 +        if (name) {
 +            printf("%-14s ", name);
 +            for (j = 1; j; j <<= 1)
 +                if ((layout & j))
 +                    printf("%s%s", (layout & (j - 1)) ? "+" : "", av_get_channel_name(j));
 +            printf("\n");
 +        }
 +    }
 +    return 0;
 +}
 +
 +int show_sample_fmts(void *optctx, const char *opt, const char *arg)
 +{
 +    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;
 +}
 +
 +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) {
 +            av_log(NULL, AV_LOG_ERROR, "Codec '%s' is known to FFmpeg, "
 +                   "but no %s for it are available. FFmpeg might need to be "
 +                   "recompiled with additional external libraries.\n",
 +                   name, encoder ? "encoders" : "decoders");
 +        }
 +    } else {
 +        av_log(NULL, AV_LOG_ERROR, "Codec '%s' is not recognized by FFmpeg.\n",
 +               name);
 +    }
 +}
 +
 +static void show_help_demuxer(const char *name)
 +{
 +    const AVInputFormat *fmt = av_find_input_format(name);
 +
 +    if (!fmt) {
 +        av_log(NULL, AV_LOG_ERROR, "Unknown format '%s'.\n", name);
 +        return;
 +    }
 +
 +    printf("Demuxer %s [%s]:\n", fmt->name, fmt->long_name);
 +
 +    if (fmt->extensions)
 +        printf("    Common extensions: %s.\n", fmt->extensions);
 +
 +    if (fmt->priv_class)
 +        show_help_children(fmt->priv_class, AV_OPT_FLAG_DECODING_PARAM);
 +}
 +
 +static void show_help_muxer(const char *name)
 +{
 +    const AVCodecDescriptor *desc;
 +    const AVOutputFormat *fmt = av_guess_format(name, NULL, NULL);
 +
 +    if (!fmt) {
 +        av_log(NULL, AV_LOG_ERROR, "Unknown format '%s'.\n", name);
 +        return;
 +    }
 +
 +    printf("Muxer %s [%s]:\n", fmt->name, fmt->long_name);
 +
 +    if (fmt->extensions)
 +        printf("    Common extensions: %s.\n", fmt->extensions);
 +    if (fmt->mime_type)
 +        printf("    Mime type: %s.\n", fmt->mime_type);
 +    if (fmt->video_codec != AV_CODEC_ID_NONE &&
 +        (desc = avcodec_descriptor_get(fmt->video_codec))) {
 +        printf("    Default video codec: %s.\n", desc->name);
 +    }
 +    if (fmt->audio_codec != AV_CODEC_ID_NONE &&
 +        (desc = avcodec_descriptor_get(fmt->audio_codec))) {
 +        printf("    Default audio codec: %s.\n", desc->name);
 +    }
 +    if (fmt->subtitle_codec != AV_CODEC_ID_NONE &&
 +        (desc = avcodec_descriptor_get(fmt->subtitle_codec))) {
 +        printf("    Default subtitle codec: %s.\n", desc->name);
 +    }
 +
 +    if (fmt->priv_class)
 +        show_help_children(fmt->priv_class, AV_OPT_FLAG_ENCODING_PARAM);
 +}
 +
 +#if CONFIG_AVFILTER
 +static void show_help_filter(const char *name)
 +{
 +#if CONFIG_AVFILTER
 +    const AVFilter *f = avfilter_get_by_name(name);
 +    int i, count;
 +
 +    if (!name) {
 +        av_log(NULL, AV_LOG_ERROR, "No filter name specified.\n");
 +        return;
 +    } else if (!f) {
 +        av_log(NULL, AV_LOG_ERROR, "Unknown filter '%s'.\n", name);
 +        return;
 +    }
 +
 +    printf("Filter %s\n", f->name);
 +    if (f->description)
 +        printf("  %s\n", f->description);
 +
 +    if (f->flags & AVFILTER_FLAG_SLICE_THREADS)
 +        printf("    slice threading supported\n");
 +
 +    printf("    Inputs:\n");
 +    count = avfilter_pad_count(f->inputs);
 +    for (i = 0; i < count; i++) {
 +        printf("       #%d: %s (%s)\n", i, avfilter_pad_get_name(f->inputs, i),
 +               media_type_string(avfilter_pad_get_type(f->inputs, i)));
 +    }
 +    if (f->flags & AVFILTER_FLAG_DYNAMIC_INPUTS)
 +        printf("        dynamic (depending on the options)\n");
 +    else if (!count)
 +        printf("        none (source filter)\n");
 +
 +    printf("    Outputs:\n");
 +    count = avfilter_pad_count(f->outputs);
 +    for (i = 0; i < count; i++) {
 +        printf("       #%d: %s (%s)\n", i, avfilter_pad_get_name(f->outputs, i),
 +               media_type_string(avfilter_pad_get_type(f->outputs, i)));
 +    }
 +    if (f->flags & AVFILTER_FLAG_DYNAMIC_OUTPUTS)
 +        printf("        dynamic (depending on the options)\n");
 +    else if (!count)
 +        printf("        none (sink filter)\n");
 +
 +    if (f->priv_class)
 +        show_help_children(f->priv_class, AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM |
 +                                          AV_OPT_FLAG_AUDIO_PARAM);
 +    if (f->flags & AVFILTER_FLAG_SUPPORT_TIMELINE)
 +        printf("This filter has support for timeline through the 'enable' option.\n");
 +#else
 +    av_log(NULL, AV_LOG_ERROR, "Build without libavfilter; "
 +           "can not to satisfy request\n");
 +#endif
 +}
 +#endif
 +
 +int show_help(void *optctx, const char *opt, const char *arg)
 +{
 +    char *topic, *par;
 +    av_log_set_callback(log_callback_help);
 +
 +    topic = av_strdup(arg ? arg : "");
 +    if (!topic)
 +        return AVERROR(ENOMEM);
 +    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);
 +    } else if (!strcmp(topic, "demuxer")) {
 +        show_help_demuxer(par);
 +    } else if (!strcmp(topic, "muxer")) {
 +        show_help_muxer(par);
 +#if CONFIG_AVFILTER
 +    } else if (!strcmp(topic, "filter")) {
 +        show_help_filter(par);
 +#endif
 +    } else {
 +        show_help_default(topic, par);
 +    }
 +
 +    av_freep(&topic);
 +    return 0;
 +}
 +
 +int read_yesno(void)
 +{
 +    int c = getchar();
 +    int yesno = (av_toupper(c) == 'Y');
 +
 +    while (c != '\n' && c != EOF)
 +        c = getchar();
 +
 +    return yesno;
 +}
 +
 +FILE *get_preset_file(char *filename, size_t filename_size,
 +                      const char *preset_name, int is_path,
 +                      const char *codec_name)
 +{
 +    FILE *f = NULL;
 +    int i;
 +    const char *base[3] = { getenv("FFMPEG_DATADIR"),
 +                            getenv("HOME"),
 +                            FFMPEG_DATADIR, };
 +
 +    if (is_path) {
 +        av_strlcpy(filename, preset_name, filename_size);
 +        f = fopen(filename, "r");
 +    } else {
 +#ifdef _WIN32
 +        char datadir[MAX_PATH], *ls;
 +        base[2] = NULL;
 +
 +        if (GetModuleFileNameA(GetModuleHandleA(NULL), datadir, sizeof(datadir) - 1))
 +        {
 +            for (ls = datadir; ls < datadir + strlen(datadir); ls++)
 +                if (*ls == '\\') *ls = '/';
 +
 +            if (ls = strrchr(datadir, '/'))
 +            {
 +                *ls = 0;
 +                strncat(datadir, "/ffpresets",  sizeof(datadir) - 1 - strlen(datadir));
 +                base[2] = datadir;
 +            }
 +        }
 +#endif
 +        for (i = 0; i < 3 && !f; i++) {
 +            if (!base[i])
 +                continue;
 +            snprintf(filename, filename_size, "%s%s/%s.ffpreset", base[i],
 +                     i != 1 ? "" : "/.ffmpeg", preset_name);
 +            f = fopen(filename, "r");
 +            if (!f && codec_name) {
 +                snprintf(filename, filename_size,
 +                         "%s%s/%s-%s.ffpreset",
 +                         base[i], i != 1 ? "" : "/.ffmpeg", codec_name,
 +                         preset_name);
 +                f = fopen(filename, "r");
 +            }
 +        }
 +    }
 +
 +    return f;
 +}
 +
 +int check_stream_specifier(AVFormatContext *s, AVStream *st, const char *spec)
 +{
 +    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;
 +}
 +
 +AVDictionary *filter_codec_opts(AVDictionary *opts, enum AVCodecID codec_id,
 +                                AVFormatContext *s, AVStream *st, AVCodec *codec)
 +{
 +    AVDictionary    *ret = NULL;
 +    AVDictionaryEntry *t = NULL;
 +    int            flags = s->oformat ? AV_OPT_FLAG_ENCODING_PARAM
 +                                      : AV_OPT_FLAG_DECODING_PARAM;
 +    char          prefix = 0;
 +    const AVClass    *cc = avcodec_get_class();
 +
 +    if (!codec)
 +        codec            = s->oformat ? avcodec_find_encoder(codec_id)
 +                                      : avcodec_find_decoder(codec_id);
 +
 +    switch (st->codecpar->codec_type) {
 +    case AVMEDIA_TYPE_VIDEO:
 +        prefix  = 'v';
 +        flags  |= AV_OPT_FLAG_VIDEO_PARAM;
 +        break;
 +    case AVMEDIA_TYPE_AUDIO:
 +        prefix  = 'a';
 +        flags  |= AV_OPT_FLAG_AUDIO_PARAM;
 +        break;
 +    case AVMEDIA_TYPE_SUBTITLE:
 +        prefix  = 's';
 +        flags  |= AV_OPT_FLAG_SUBTITLE_PARAM;
 +        break;
 +    }
 +
 +    while (t = av_dict_get(opts, "", t, AV_DICT_IGNORE_SUFFIX)) {
 +        char *p = strchr(t->key, ':');
 +
 +        /* check stream specification in opt name */
 +        if (p)
 +            switch (check_stream_specifier(s, st, p + 1)) {
 +            case  1: *p = 0; break;
 +            case  0:         continue;
 +            default:         exit_program(1);
 +            }
 +
 +        if (av_opt_find(&cc, t->key, NULL, flags, AV_OPT_SEARCH_FAKE_OBJ) ||
 +            !codec ||
 +            (codec->priv_class &&
 +             av_opt_find(&codec->priv_class, t->key, NULL, flags,
 +                         AV_OPT_SEARCH_FAKE_OBJ)))
 +            av_dict_set(&ret, t->key, t->value, 0);
 +        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);
 +
 +        if (p)
 +            *p = ':';
 +    }
 +    return ret;
 +}
 +
 +AVDictionary **setup_find_stream_info_opts(AVFormatContext *s,
 +                                           AVDictionary *codec_opts)
 +{
 +    int i;
 +    AVDictionary **opts;
 +
 +    if (!s->nb_streams)
 +        return NULL;
 +    opts = av_mallocz_array(s->nb_streams, sizeof(*opts));
 +    if (!opts) {
 +        av_log(NULL, AV_LOG_ERROR,
 +               "Could not alloc memory for stream options.\n");
 +        return NULL;
 +    }
 +    for (i = 0; i < s->nb_streams; i++)
 +        opts[i] = filter_codec_opts(codec_opts, s->streams[i]->codecpar->codec_id,
 +                                    s, s->streams[i], NULL);
 +    return opts;
 +}
 +
 +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");
 +        exit_program(1);
 +    }
 +    if (*size < new_size) {
 +        uint8_t *tmp = av_realloc_array(array, new_size, elem_size);
 +        if (!tmp) {
 +            av_log(NULL, AV_LOG_ERROR, "Could not alloc buffer.\n");
 +            exit_program(1);
 +        }
 +        memset(tmp + *size*elem_size, 0, (new_size-*size) * elem_size);
 +        *size = new_size;
 +        return tmp;
 +    }
 +    return array;
 +}
 +
 +double get_rotation(AVStream *st)
 +{
 +    uint8_t* displaymatrix = av_stream_get_side_data(st,
 +                                                     AV_PKT_DATA_DISPLAYMATRIX, NULL);
 +    double theta = 0;
 +    if (displaymatrix)
 +        theta = -av_display_rotation_get((int32_t*) displaymatrix);
 +
 +    theta -= 360*floor(theta/360 + 0.9/360);
 +
 +    if (fabs(theta - 90*round(theta/90)) > 2)
 +        av_log(NULL, AV_LOG_WARNING, "Odd rotation angle.\n"
 +               "If you want to help, upload a sample "
 +               "of this file to ftp://upload.ffmpeg.org/incoming/ "
 +               "and contact the ffmpeg-devel mailing list. (ffmpeg-devel at ffmpeg.org)");
 +
 +    return theta;
 +}
 +
 +#if CONFIG_AVDEVICE
 +static int print_device_sources(AVInputFormat *fmt, AVDictionary *opts)
 +{
 +    int ret, i;
 +    AVDeviceInfoList *device_list = NULL;
 +
 +    if (!fmt || !fmt->priv_class  || !AV_IS_INPUT_DEVICE(fmt->priv_class->category))
 +        return AVERROR(EINVAL);
 +
 +    printf("Auto-detected sources for %s:\n", fmt->name);
 +    if (!fmt->get_device_list) {
 +        ret = AVERROR(ENOSYS);
 +        printf("Cannot list sources. Not implemented.\n");
 +        goto fail;
 +    }
 +
 +    if ((ret = avdevice_list_input_sources(fmt, NULL, opts, &device_list)) < 0) {
 +        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;
 +}
 +
 +static int print_device_sinks(AVOutputFormat *fmt, AVDictionary *opts)
 +{
 +    int ret, i;
 +    AVDeviceInfoList *device_list = NULL;
 +
 +    if (!fmt || !fmt->priv_class  || !AV_IS_OUTPUT_DEVICE(fmt->priv_class->category))
 +        return AVERROR(EINVAL);
 +
 +    printf("Auto-detected sinks for %s:\n", fmt->name);
 +    if (!fmt->get_device_list) {
 +        ret = AVERROR(ENOSYS);
 +        printf("Cannot list sinks. Not implemented.\n");
 +        goto fail;
 +    }
 +
 +    if ((ret = avdevice_list_output_sinks(fmt, NULL, opts, &device_list)) < 0) {
 +        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)
 +{
 +    AVInputFormat *fmt = NULL;
 +    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;
 +
 +    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);
 +  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)
 +{
 +    AVOutputFormat *fmt = NULL;
 +    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;
 +
 +    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);
 +  fail:
 +    av_dict_free(&opts);
 +    av_free(dev);
 +    av_log_set_level(error_level);
 +    return ret;
 +}
 +
 +#endif



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