cmdutils.c 30.6 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 Libav.
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 *
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 * Libav 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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 * Libav 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 Libav; 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>
#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 "libavformat/avformat.h"
#include "libavfilter/avfilter.h"
#include "libavdevice/avdevice.h"
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#include "libswscale/swscale.h"
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#include "libpostproc/postprocess.h"
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#include "libavutil/avstring.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/opt.h"
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#include "cmdutils.h"
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#include "version.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
#include <sys/resource.h>
#endif
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const char **opt_names;
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const char **opt_values;
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static int opt_name_count;
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AVCodecContext *avcodec_opts[AVMEDIA_TYPE_NB];
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AVFormatContext *avformat_opts;
struct SwsContext *sws_opts;
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static const int this_year = 2011;
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void init_opts(void)
{
    int i;
    for (i = 0; i < AVMEDIA_TYPE_NB; i++)
        avcodec_opts[i] = avcodec_alloc_context2(i);
    avformat_opts = avformat_alloc_context();
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#if CONFIG_SWSCALE
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    sws_opts = sws_getContext(16, 16, 0, 16, 16, 0, SWS_BICUBIC, NULL, NULL, NULL);
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#endif
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}

void uninit_opts(void)
{
    int i;
    for (i = 0; i < AVMEDIA_TYPE_NB; i++)
        av_freep(&avcodec_opts[i]);
    av_freep(&avformat_opts->key);
    av_freep(&avformat_opts);
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#if CONFIG_SWSCALE
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    sws_freeContext(sws_opts);
    sws_opts = NULL;
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#endif
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    for (i = 0; i < opt_name_count; i++) {
        //opt_values are only stored for codec-specific options in which case
        //both the name and value are dup'd
        if (opt_values[i]) {
            av_freep(&opt_names[i]);
            av_freep(&opt_values[i]);
        }
    }
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    av_freep(&opt_names);
    av_freep(&opt_values);
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    opt_name_count = 0;
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}

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

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double parse_number_or_die(const char *context, const char *numstr, int type, double min, double max)
{
    char *tail;
    const char *error;
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    double d = av_strtod(numstr, &tail);
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    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";
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    else if (type == OPT_INT && (int)d != d)
        error= "Expected int for %s but found %s\n";
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    else
        return d;
    fprintf(stderr, error, context, numstr, min, max);
    exit(1);
}

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

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void show_help_options(const OptionDef *options, const char *msg, int mask, int value)
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{
    const OptionDef *po;
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    int first;
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    first = 1;
    for(po = options; po->name != NULL; po++) {
        char buf[64];
        if ((po->flags & mask) == value) {
            if (first) {
                printf("%s", msg);
                first = 0;
            }
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            av_strlcpy(buf, po->name, sizeof(buf));
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            if (po->flags & HAS_ARG) {
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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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static const OptionDef* find_option(const OptionDef *po, const char *name){
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    while (po->name != NULL) {
        if (!strcmp(name, po->name))
            break;
        po++;
    }
    return po;
}

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#if defined(_WIN32) && !defined(__MINGW32CE__)
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#include <windows.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);

    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 == NULL) {
        LocalFree(argv_w);
        return;
    }

    for (i = 0; i < win32_argc; i++) {
        win32_argv_utf8[i] = &argstr_flat[offset];
        offset += WideCharToMultiByte(CP_UTF8, 0, argv_w[i], -1,
                                      &argstr_flat[offset],
                                      buffsize - offset, NULL, NULL);
    }
    win32_argv_utf8[i] = NULL;
    LocalFree(argv_w);

    *argc_ptr = win32_argc;
    *argv_ptr = win32_argv_utf8;
}
#else
static inline void prepare_app_arguments(int *argc_ptr, char ***argv_ptr)
{
    /* nothing to do */
}
#endif /* WIN32 && !__MINGW32CE__ */

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void parse_options(int argc, char **argv, const OptionDef *options,
                   void (* parse_arg_function)(const char*))
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{
    const char *opt, *arg;
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    int optindex, handleoptions=1;
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    const OptionDef *po;

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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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            int bool_val = 1;
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            if (opt[1] == '-' && opt[2] == '\0') {
                handleoptions = 0;
                continue;
            }
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            opt++;
            po= find_option(options, opt);
            if (!po->name && opt[0] == 'n' && opt[1] == 'o') {
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                /* handle 'no' bool option */
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                po = find_option(options, opt + 2);
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                if (!(po->name && (po->flags & OPT_BOOL)))
                    goto unknown_opt;
                bool_val = 0;
            }
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            if (!po->name)
                po= find_option(options, "default");
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            if (!po->name) {
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unknown_opt:
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                fprintf(stderr, "%s: unrecognized option '%s'\n", argv[0], opt);
                exit(1);
            }
            arg = NULL;
            if (po->flags & HAS_ARG) {
                arg = argv[optindex++];
                if (!arg) {
                    fprintf(stderr, "%s: missing argument for option '%s'\n", argv[0], opt);
                    exit(1);
                }
            }
            if (po->flags & OPT_STRING) {
                char *str;
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                str = av_strdup(arg);
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                *po->u.str_arg = str;
            } else if (po->flags & OPT_BOOL) {
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                *po->u.int_arg = bool_val;
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            } else if (po->flags & OPT_INT) {
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                *po->u.int_arg = 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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                *po->u.int64_arg = parse_number_or_die(opt, arg, OPT_INT64, INT64_MIN, INT64_MAX);
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            } else if (po->flags & OPT_FLOAT) {
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                *po->u.float_arg = parse_number_or_die(opt, arg, OPT_FLOAT, -INFINITY, INFINITY);
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            } else {
                if (po->u.func_arg(opt, arg) < 0) {
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                    fprintf(stderr, "%s: failed to set value '%s' for option '%s'\n", argv[0], arg, opt);
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                    exit(1);
                }
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            }
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            if(po->flags & OPT_EXIT)
                exit(0);
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        } else {
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            if (parse_arg_function)
                parse_arg_function(opt);
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        }
    }
}

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int opt_default(const char *opt, const char *arg){
    int type;
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    int ret= 0;
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    const AVOption *o= NULL;
    int opt_types[]={AV_OPT_FLAG_VIDEO_PARAM, AV_OPT_FLAG_AUDIO_PARAM, 0, AV_OPT_FLAG_SUBTITLE_PARAM, 0};

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    for(type=0; *avcodec_opts && type<AVMEDIA_TYPE_NB && ret>= 0; type++){
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        const AVOption *o2 = av_find_opt(avcodec_opts[0], opt, NULL, opt_types[type], opt_types[type]);
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        if(o2)
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            ret = av_set_string3(avcodec_opts[type], opt, arg, 1, &o);
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    }
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    if(!o && avformat_opts)
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        ret = av_set_string3(avformat_opts, opt, arg, 1, &o);
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    if(!o && sws_opts)
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        ret = av_set_string3(sws_opts, opt, arg, 1, &o);
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    if(!o){
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        if (opt[0] == 'a' && avcodec_opts[AVMEDIA_TYPE_AUDIO])
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            ret = av_set_string3(avcodec_opts[AVMEDIA_TYPE_AUDIO], opt+1, arg, 1, &o);
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        else if(opt[0] == 'v' && avcodec_opts[AVMEDIA_TYPE_VIDEO])
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            ret = av_set_string3(avcodec_opts[AVMEDIA_TYPE_VIDEO], opt+1, arg, 1, &o);
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        else if(opt[0] == 's' && avcodec_opts[AVMEDIA_TYPE_SUBTITLE])
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            ret = av_set_string3(avcodec_opts[AVMEDIA_TYPE_SUBTITLE], opt+1, arg, 1, &o);
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    }
    if (o && ret < 0) {
        fprintf(stderr, "Invalid value '%s' for option '%s'\n", arg, opt);
        exit(1);
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    }
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    if (!o) {
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        AVCodec *p = NULL;
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        AVOutputFormat *oformat = NULL;
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        while ((p=av_codec_next(p))){
            AVClass *c= p->priv_class;
            if(c && av_find_opt(&c, opt, NULL, 0, 0))
                break;
        }
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        if (!p) {
            while ((oformat = av_oformat_next(oformat))) {
                const AVClass *c = oformat->priv_class;
                if (c && av_find_opt(&c, opt, NULL, 0, 0))
                    break;
            }
        }
        if(!p && !oformat){
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            fprintf(stderr, "Unrecognized option '%s'\n", opt);
            exit(1);
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        }
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    }
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//    av_log(NULL, AV_LOG_ERROR, "%s:%s: %f 0x%0X\n", opt, arg, av_get_double(avcodec_opts, opt, NULL), (int)av_get_int(avcodec_opts, opt, NULL));
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    //FIXME we should always use avcodec_opts, ... for storing options so there will not be any need to keep track of what i set over this
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    opt_values= av_realloc(opt_values, sizeof(void*)*(opt_name_count+1));
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    opt_values[opt_name_count]= o ? NULL : av_strdup(arg);
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    opt_names= av_realloc(opt_names, sizeof(void*)*(opt_name_count+1));
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    opt_names[opt_name_count++]= o ? o->name : av_strdup(opt);
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    if ((*avcodec_opts && avcodec_opts[0]->debug) || (avformat_opts && avformat_opts->debug))
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        av_log_set_level(AV_LOG_DEBUG);
    return 0;
}

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int opt_loglevel(const char *opt, const char *arg)
{
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    const struct { const char *name; int level; } log_levels[] = {
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        { "quiet"  , AV_LOG_QUIET   },
        { "panic"  , AV_LOG_PANIC   },
        { "fatal"  , AV_LOG_FATAL   },
        { "error"  , AV_LOG_ERROR   },
        { "warning", AV_LOG_WARNING },
        { "info"   , AV_LOG_INFO    },
        { "verbose", AV_LOG_VERBOSE },
        { "debug"  , AV_LOG_DEBUG   },
    };
    char *tail;
    int level;
    int i;

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

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int opt_timelimit(const char *opt, const char *arg)
{
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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
    fprintf(stderr, "Warning: -%s not implemented on this OS\n", opt);
#endif
    return 0;
}

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void set_context_opts(void *ctx, void *opts_ctx, int flags, AVCodec *codec)
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{
    int i;
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    void *priv_ctx=NULL;
    if(!strcmp("AVCodecContext", (*(AVClass**)ctx)->class_name)){
        AVCodecContext *avctx= ctx;
        if(codec && codec->priv_class && avctx->priv_data){
            priv_ctx= avctx->priv_data;
        }
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    } else if (!strcmp("AVFormatContext", (*(AVClass**)ctx)->class_name)) {
        AVFormatContext *avctx = ctx;
        if (avctx->oformat && avctx->oformat->priv_class) {
            priv_ctx = avctx->priv_data;
        }
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    }
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    for(i=0; i<opt_name_count; i++){
        char buf[256];
        const AVOption *opt;
        const char *str= av_get_string(opts_ctx, opt_names[i], &opt, buf, sizeof(buf));
        /* if an option with name opt_names[i] is present in opts_ctx then str is non-NULL */
        if(str && ((opt->flags & flags) == flags))
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            av_set_string3(ctx, opt_names[i], str, 1, NULL);
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        /* We need to use a differnt system to pass options to the private context because
           it is not known which codec and thus context kind that will be when parsing options
           we thus use opt_values directly instead of opts_ctx */
        if(!str && priv_ctx && av_get_string(priv_ctx, opt_names[i], &opt, buf, sizeof(buf))){
            av_set_string3(priv_ctx, opt_names[i], opt_values[i], 1, NULL);
        }
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    }
}

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void print_error(const char *filename, int err)
{
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    char errbuf[128];
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    const char *errbuf_ptr = errbuf;
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    if (av_strerror(err, errbuf, sizeof(errbuf)) < 0)
        errbuf_ptr = strerror(AVUNERROR(err));
    fprintf(stderr, "%s: %s\n", filename, errbuf_ptr);
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}
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static int warned_cfg = 0;

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#define INDENT        1
#define SHOW_VERSION  2
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#define SHOW_CONFIG   4
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#define PRINT_LIB_INFO(outstream,libname,LIBNAME,flags)                 \
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    if (CONFIG_##LIBNAME) {                                             \
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        const char *indent = flags & INDENT? "  " : "";                 \
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        if (flags & SHOW_VERSION) {                                     \
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            unsigned int version = libname##_version();                 \
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            fprintf(outstream, "%slib%-9s %2d.%3d.%2d / %2d.%3d.%2d\n", \
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                    indent, #libname,                                   \
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                    LIB##LIBNAME##_VERSION_MAJOR,                       \
                    LIB##LIBNAME##_VERSION_MINOR,                       \
                    LIB##LIBNAME##_VERSION_MICRO,                       \
                    version >> 16, version >> 8 & 0xff, version & 0xff); \
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        }                                                               \
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        if (flags & SHOW_CONFIG) {                                      \
            const char *cfg = libname##_configuration();                \
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            if (strcmp(LIBAV_CONFIGURATION, cfg)) {                     \
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                if (!warned_cfg) {                                      \
                    fprintf(outstream,                                  \
                            "%sWARNING: library configuration mismatch\n", \
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                            indent);                                    \
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                    warned_cfg = 1;                                     \
                }                                                       \
                fprintf(stderr, "%s%-11s configuration: %s\n",          \
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                        indent, #libname, cfg);                         \
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            }                                                           \
        }                                                               \
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    }                                                                   \
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static void print_all_libs_info(FILE* outstream, int flags)
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{
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    PRINT_LIB_INFO(outstream, avutil,   AVUTIL,   flags);
    PRINT_LIB_INFO(outstream, avcodec,  AVCODEC,  flags);
    PRINT_LIB_INFO(outstream, avformat, AVFORMAT, flags);
    PRINT_LIB_INFO(outstream, avdevice, AVDEVICE, flags);
    PRINT_LIB_INFO(outstream, avfilter, AVFILTER, flags);
    PRINT_LIB_INFO(outstream, swscale,  SWSCALE,  flags);
    PRINT_LIB_INFO(outstream, postproc, POSTPROC, flags);
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}

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void show_banner(void)
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{
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    fprintf(stderr, "%s version " LIBAV_VERSION ", Copyright (c) %d-%d the Libav developers\n",
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            program_name, program_birth_year, this_year);
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    fprintf(stderr, "  built on %s %s with %s %s\n",
            __DATE__, __TIME__, CC_TYPE, CC_VERSION);
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    fprintf(stderr, "  configuration: " LIBAV_CONFIGURATION "\n");
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    print_all_libs_info(stderr, INDENT|SHOW_CONFIG);
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    print_all_libs_info(stderr, INDENT|SHOW_VERSION);
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}

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void show_version(void) {
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    printf("%s " LIBAV_VERSION "\n", program_name);
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    print_all_libs_info(stdout, SHOW_VERSION);
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}

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void show_license(void)
{
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    printf(
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#if CONFIG_NONFREE
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    "This version of %s has nonfree parts compiled in.\n"
    "Therefore it is not legally redistributable.\n",
    program_name
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#elif CONFIG_GPLV3
    "%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
527
#elif CONFIG_GPL
528
    "%s is free software; you can redistribute it and/or modify\n"
529 530 531 532
    "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"
533
    "%s is distributed in the hope that it will be useful,\n"
534 535 536 537 538
    "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"
539 540 541
    "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
542 543 544 545 546 547 548 549 550 551 552 553 554 555
#elif CONFIG_LGPLV3
    "%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
556
#else
557
    "%s is free software; you can redistribute it and/or\n"
558 559 560 561
    "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"
562
    "%s is distributed in the hope that it will be useful,\n"
563 564 565 566 567
    "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"
568 569 570
    "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
571
#endif
572
    );
573
}
574 575 576 577 578 579 580

void show_formats(void)
{
    AVInputFormat *ifmt=NULL;
    AVOutputFormat *ofmt=NULL;
    const char *last_name;

581 582 583 584 585
    printf(
        "File formats:\n"
        " D. = Demuxing supported\n"
        " .E = Muxing supported\n"
        " --\n");
586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621
    last_name= "000";
    for(;;){
        int decode=0;
        int encode=0;
        const char *name=NULL;
        const char *long_name=NULL;

        while((ofmt= av_oformat_next(ofmt))) {
            if((name == NULL || strcmp(ofmt->name, name)<0) &&
                strcmp(ofmt->name, last_name)>0){
                name= ofmt->name;
                long_name= ofmt->long_name;
                encode=1;
            }
        }
        while((ifmt= av_iformat_next(ifmt))) {
            if((name == NULL || 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==NULL)
            break;
        last_name= name;

        printf(
            " %s%s %-15s %s\n",
            decode ? "D":" ",
            encode ? "E":" ",
            name,
            long_name ? long_name:" ");
    }
622
}
623

624 625 626 627
void show_codecs(void)
{
    AVCodec *p=NULL, *p2;
    const char *last_name;
628 629 630 631 632 633 634 635 636 637 638
    printf(
        "Codecs:\n"
        " D..... = Decoding supported\n"
        " .E.... = Encoding supported\n"
        " ..V... = Video codec\n"
        " ..A... = Audio codec\n"
        " ..S... = Subtitle codec\n"
        " ...S.. = Supports draw_horiz_band\n"
        " ....D. = Supports direct rendering method 1\n"
        " .....T = Supports weird frame truncation\n"
        " ------\n");
639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663
    last_name= "000";
    for(;;){
        int decode=0;
        int encode=0;
        int cap=0;
        const char *type_str;

        p2=NULL;
        while((p= av_codec_next(p))) {
            if((p2==NULL || strcmp(p->name, p2->name)<0) &&
                strcmp(p->name, last_name)>0){
                p2= p;
                decode= encode= cap=0;
            }
            if(p2 && strcmp(p->name, p2->name)==0){
                if(p->decode) decode=1;
                if(p->encode) encode=1;
                cap |= p->capabilities;
            }
        }
        if(p2==NULL)
            break;
        last_name= p2->name;

        switch(p2->type) {
664
        case AVMEDIA_TYPE_VIDEO:
665 666
            type_str = "V";
            break;
667
        case AVMEDIA_TYPE_AUDIO:
668 669
            type_str = "A";
            break;
670
        case AVMEDIA_TYPE_SUBTITLE:
671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691
            type_str = "S";
            break;
        default:
            type_str = "?";
            break;
        }
        printf(
            " %s%s%s%s%s%s %-15s %s",
            decode ? "D": (/*p2->decoder ? "d":*/" "),
            encode ? "E":" ",
            type_str,
            cap & CODEC_CAP_DRAW_HORIZ_BAND ? "S":" ",
            cap & CODEC_CAP_DR1 ? "D":" ",
            cap & CODEC_CAP_TRUNCATED ? "T":" ",
            p2->name,
            p2->long_name ? p2->long_name : "");
       /* if(p2->decoder && decode==0)
            printf(" use %s for decoding", p2->decoder->name);*/
        printf("\n");
    }
    printf("\n");
692 693 694 695 696 697 698 699 700 701 702
    printf(
"Note, the names of encoders and decoders do not always match, so there are\n"
"several cases where the above table shows encoder only or decoder only entries\n"
"even though both encoding and decoding are supported. For example, the h263\n"
"decoder corresponds to the h263 and h263p encoders, for file formats it is even\n"
"worse.\n");
}

void show_bsfs(void)
{
    AVBitStreamFilter *bsf=NULL;
703 704 705

    printf("Bitstream filters:\n");
    while((bsf = av_bitstream_filter_next(bsf)))
706
        printf("%s\n", bsf->name);
707
    printf("\n");
708 709 710 711
}

void show_protocols(void)
{
712 713
    void *opaque = NULL;
    const char *name;
714

715
    printf("Supported file protocols:\n"
716 717 718 719 720 721
           "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);
722
}
723

724 725
void show_filters(void)
{
726
    AVFilter av_unused(**filter) = NULL;
727 728

    printf("Filters:\n");
729
#if CONFIG_AVFILTER
730 731
    while ((filter = av_filter_next(filter)) && *filter)
        printf("%-16s %s\n", (*filter)->name, (*filter)->description);
732
#endif
733 734
}

735 736
void show_pix_fmts(void)
{
737 738 739 740 741 742 743 744 745 746 747 748
    enum PixelFormat pix_fmt;

    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");

749 750 751 752 753
#if !CONFIG_SWSCALE
#   define sws_isSupportedInput(x)  0
#   define sws_isSupportedOutput(x) 0
#endif

754 755 756 757 758 759 760 761 762 763 764 765
    for (pix_fmt = 0; pix_fmt < PIX_FMT_NB; pix_fmt++) {
        const AVPixFmtDescriptor *pix_desc = &av_pix_fmt_descriptors[pix_fmt];
        printf("%c%c%c%c%c %-16s       %d            %2d\n",
               sws_isSupportedInput (pix_fmt)      ? 'I' : '.',
               sws_isSupportedOutput(pix_fmt)      ? 'O' : '.',
               pix_desc->flags & PIX_FMT_HWACCEL   ? 'H' : '.',
               pix_desc->flags & PIX_FMT_PAL       ? 'P' : '.',
               pix_desc->flags & PIX_FMT_BITSTREAM ? 'B' : '.',
               pix_desc->name,
               pix_desc->nb_components,
               av_get_bits_per_pixel(pix_desc));
    }
766 767
}

768 769 770 771 772 773 774 775 776 777
int read_yesno(void)
{
    int c = getchar();
    int yesno = (toupper(c) == 'Y');

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

    return yesno;
}
778 779 780

int read_file(const char *filename, char **bufptr, size_t *size)
{
781
    FILE *f = fopen(filename, "rb");
782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801

    if (!f) {
        fprintf(stderr, "Cannot read file '%s': %s\n", filename, strerror(errno));
        return AVERROR(errno);
    }
    fseek(f, 0, SEEK_END);
    *size = ftell(f);
    fseek(f, 0, SEEK_SET);
    *bufptr = av_malloc(*size + 1);
    if (!*bufptr) {
        fprintf(stderr, "Could not allocate file buffer\n");
        fclose(f);
        return AVERROR(ENOMEM);
    }
    fread(*bufptr, 1, *size, f);
    (*bufptr)[*size++] = '\0';

    fclose(f);
    return 0;
}
802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820

void init_pts_correction(PtsCorrectionContext *ctx)
{
    ctx->num_faulty_pts = ctx->num_faulty_dts = 0;
    ctx->last_pts = ctx->last_dts = INT64_MIN;
}

int64_t guess_correct_pts(PtsCorrectionContext *ctx, int64_t reordered_pts, int64_t dts)
{
    int64_t pts = AV_NOPTS_VALUE;

    if (dts != AV_NOPTS_VALUE) {
        ctx->num_faulty_dts += dts <= ctx->last_dts;
        ctx->last_dts = dts;
    }
    if (reordered_pts != AV_NOPTS_VALUE) {
        ctx->num_faulty_pts += reordered_pts <= ctx->last_pts;
        ctx->last_pts = reordered_pts;
    }
821
    if ((ctx->num_faulty_pts<=ctx->num_faulty_dts || dts == AV_NOPTS_VALUE)
822 823 824 825 826 827 828
       && reordered_pts != AV_NOPTS_VALUE)
        pts = reordered_pts;
    else
        pts = dts;

    return pts;
}
829

830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859
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 {
        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;
}

860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898
#if CONFIG_AVFILTER

static int ffsink_init(AVFilterContext *ctx, const char *args, void *opaque)
{
    FFSinkContext *priv = ctx->priv;

    if (!opaque)
        return AVERROR(EINVAL);
    *priv = *(FFSinkContext *)opaque;

    return 0;
}

static void null_end_frame(AVFilterLink *inlink) { }

static int ffsink_query_formats(AVFilterContext *ctx)
{
    FFSinkContext *priv = ctx->priv;
    enum PixelFormat pix_fmts[] = { priv->pix_fmt, PIX_FMT_NONE };

    avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts));
    return 0;
}

AVFilter ffsink = {
    .name      = "ffsink",
    .priv_size = sizeof(FFSinkContext),
    .init      = ffsink_init,

    .query_formats = ffsink_query_formats,

    .inputs    = (AVFilterPad[]) {{ .name          = "default",
                                    .type          = AVMEDIA_TYPE_VIDEO,
                                    .end_frame     = null_end_frame,
                                    .min_perms     = AV_PERM_READ, },
                                  { .name = NULL }},
    .outputs   = (AVFilterPad[]) {{ .name = NULL }},
};

899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916
int get_filtered_video_frame(AVFilterContext *ctx, AVFrame *frame,
                             AVFilterBufferRef **picref_ptr, AVRational *tb)
{
    int ret;
    AVFilterBufferRef *picref;

    if ((ret = avfilter_request_frame(ctx->inputs[0])) < 0)
        return ret;
    if (!(picref = ctx->inputs[0]->cur_buf))
        return AVERROR(ENOENT);
    *picref_ptr = picref;
    ctx->inputs[0]->cur_buf = NULL;
    *tb = ctx->inputs[0]->time_base;

    memcpy(frame->data,     picref->data,     sizeof(frame->data));
    memcpy(frame->linesize, picref->linesize, sizeof(frame->linesize));
    frame->interlaced_frame = picref->video->interlaced;
    frame->top_field_first  = picref->video->top_field_first;
917 918
    frame->key_frame        = picref->video->key_frame;
    frame->pict_type        = picref->video->pict_type;
919 920 921 922

    return 1;
}

923
#endif /* CONFIG_AVFILTER */