/*
  * AVOptions
  * Copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at>
  *
  * 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
  */
 
 /**
  * @file
  * AVOptions
  * @author Michael Niedermayer <michaelni@gmx.at>
  */
 
 #include "avutil.h"

 #include "avstring.h"

 #include "opt.h"

 #include "eval.h"

 #include "dict.h"

 #if FF_API_FIND_OPT

 //FIXME order them and do a bin search

 const AVOption *av_find_opt(void *v, const char *name, const char *unit, int mask, int flags)
 {

     const AVOption *o = NULL;

     while ((o = av_next_option(v, o))) {

         if (!strcmp(o->name, name) && (!unit || (o->unit && !strcmp(o->unit, unit))) && (o->flags & mask) == flags)

             return o;
     }
     return NULL;
 }

 #endif

 const AVOption *av_next_option(void *obj, const AVOption *last)
 {
     if (last && last[1].name) return ++last;

     else if (last || !(*(AVClass**)obj)->option->name) return NULL;

     else                      return (*(AVClass**)obj)->option;

 }
 

 static int av_set_number2(void *obj, const char *name, double num, int den, int64_t intnum, const AVOption **o_out)
 {

     const AVOption *o = av_opt_find(obj, name, NULL, 0, 0);

     void *dst;

     if (o_out)

         *o_out= o;

     if (!o || o->offset<=0)

         return AVERROR_OPTION_NOT_FOUND;

     if (o->max*den < num*intnum || o->min*den > num*intnum) {

         av_log(obj, AV_LOG_ERROR, "Value %lf for parameter '%s' out of range\n", num, name);
         return AVERROR(ERANGE);
     }
 
     dst= ((uint8_t*)obj) + o->offset;
 

     switch (o->type) {

     case FF_OPT_TYPE_FLAGS:
     case FF_OPT_TYPE_INT:   *(int       *)dst= llrint(num/den)*intnum; break;
     case FF_OPT_TYPE_INT64: *(int64_t   *)dst= llrint(num/den)*intnum; break;
     case FF_OPT_TYPE_FLOAT: *(float     *)dst= num*intnum/den;         break;
     case FF_OPT_TYPE_DOUBLE:*(double    *)dst= num*intnum/den;         break;
     case FF_OPT_TYPE_RATIONAL:

         if ((int)num == num) *(AVRational*)dst= (AVRational){num*intnum, den};
         else                 *(AVRational*)dst= av_d2q(num*intnum/den, 1<<24);

         break;
     default:
         return AVERROR(EINVAL);
     }
     return 0;
 }
 

 static const AVOption *av_set_number(void *obj, const char *name, double num, int den, int64_t intnum)
 {

     const AVOption *o = NULL;
     if (av_set_number2(obj, name, num, den, intnum, &o) < 0)
         return NULL;
     else
         return o;
 }
 

 static const double const_values[] = {

     M_PI,
     M_E,
     FF_QP2LAMBDA,
     0
 };
 

 static const char * const const_names[] = {

     "PI",
     "E",
     "QP2LAMBDA",
     0
 };
 
 static int hexchar2int(char c) {
     if (c >= '0' && c <= '9') return c - '0';
     if (c >= 'a' && c <= 'f') return c - 'a' + 10;
     if (c >= 'A' && c <= 'F') return c - 'A' + 10;
     return -1;
 }
 

 int av_set_string3(void *obj, const char *name, const char *val, int alloc, const AVOption **o_out)
 {

     int ret;

     const AVOption *o = av_opt_find(obj, name, NULL, 0, 0);

     if (o_out)
         *o_out = o;

     if (!o)

         return AVERROR_OPTION_NOT_FOUND;

     if ((!val && o->type != FF_OPT_TYPE_STRING) || o->offset<=0)

         return AVERROR(EINVAL);
 

     if (o->type == FF_OPT_TYPE_BINARY) {

         uint8_t **dst = (uint8_t **)(((uint8_t*)obj) + o->offset);
         int *lendst = (int *)(dst + 1);
         uint8_t *bin, *ptr;
         int len = strlen(val);
         av_freep(dst);
         *lendst = 0;
         if (len & 1) return AVERROR(EINVAL);
         len /= 2;
         ptr = bin = av_malloc(len);
         while (*val) {
             int a = hexchar2int(*val++);
             int b = hexchar2int(*val++);
             if (a < 0 || b < 0) {
                 av_free(bin);
                 return AVERROR(EINVAL);
             }
             *ptr++ = (a << 4) | b;
         }
         *dst = bin;
         *lendst = len;
         return 0;
     }

     if (o->type != FF_OPT_TYPE_STRING) {

         int notfirst=0;

         for (;;) {

             int i;
             char buf[256];
             int cmd=0;
             double d;
 

             if (*val == '+' || *val == '-')

                 cmd= *(val++);
 

             for (i=0; i<sizeof(buf)-1 && val[i] && val[i]!='+' && val[i]!='-'; i++)

                 buf[i]= val[i];
             buf[i]=0;
 
             {

                 const AVOption *o_named = av_opt_find(obj, buf, o->unit, 0, 0);

                 if (o_named && o_named->type == FF_OPT_TYPE_CONST)

                     d= o_named->default_val.dbl;
                 else if (!strcmp(buf, "default")) d= o->default_val.dbl;

                 else if (!strcmp(buf, "max"    )) d= o->max;
                 else if (!strcmp(buf, "min"    )) d= o->min;
                 else if (!strcmp(buf, "none"   )) d= 0;
                 else if (!strcmp(buf, "all"    )) d= ~0;

                 else {

                     int res = av_expr_parse_and_eval(&d, buf, const_names, const_values, NULL, NULL, NULL, NULL, NULL, 0, obj);

                     if (res < 0) {
                         av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\"\n", val);
                         return res;
                     }
                 }
             }

             if (o->type == FF_OPT_TYPE_FLAGS) {
                 if      (cmd=='+') d= av_get_int(obj, name, NULL) | (int64_t)d;
                 else if (cmd=='-') d= av_get_int(obj, name, NULL) &~(int64_t)d;
             } else {
                 if      (cmd=='+') d= notfirst*av_get_double(obj, name, NULL) + d;
                 else if (cmd=='-') d= notfirst*av_get_double(obj, name, NULL) - d;

             }
 
             if ((ret = av_set_number2(obj, name, d, 1, 1, o_out)) < 0)
                 return ret;
             val+= i;

             if (!*val)

                 return 0;
             notfirst=1;
         }
         return AVERROR(EINVAL);
     }
 

     if (alloc) {

         av_free(*(void**)(((uint8_t*)obj) + o->offset));
         val= av_strdup(val);
     }
 
     memcpy(((uint8_t*)obj) + o->offset, &val, sizeof(val));
     return 0;
 }
 

 const AVOption *av_set_double(void *obj, const char *name, double n)
 {

     return av_set_number(obj, name, n, 1, 1);
 }
 

 const AVOption *av_set_q(void *obj, const char *name, AVRational n)
 {

     return av_set_number(obj, name, n.num, n.den, 1);
 }
 

 const AVOption *av_set_int(void *obj, const char *name, int64_t n)
 {

     return av_set_number(obj, name, 1, 1, n);
 }
 
 /**
  *
  * @param buf a buffer which is used for returning non string values as strings, can be NULL
  * @param buf_len allocated length in bytes of buf
  */

 const char *av_get_string(void *obj, const char *name, const AVOption **o_out, char *buf, int buf_len)
 {

     const AVOption *o = av_opt_find(obj, name, NULL, 0, 0);

     void *dst;
     uint8_t *bin;
     int len, i;

     if (!o || o->offset<=0)

         return NULL;

     if (o->type != FF_OPT_TYPE_STRING && (!buf || !buf_len))

         return NULL;
 
     dst= ((uint8_t*)obj) + o->offset;

     if (o_out) *o_out= o;

     switch (o->type) {

     case FF_OPT_TYPE_FLAGS:     snprintf(buf, buf_len, "0x%08X",*(int    *)dst);break;
     case FF_OPT_TYPE_INT:       snprintf(buf, buf_len, "%d" , *(int    *)dst);break;
     case FF_OPT_TYPE_INT64:     snprintf(buf, buf_len, "%"PRId64, *(int64_t*)dst);break;
     case FF_OPT_TYPE_FLOAT:     snprintf(buf, buf_len, "%f" , *(float  *)dst);break;
     case FF_OPT_TYPE_DOUBLE:    snprintf(buf, buf_len, "%f" , *(double *)dst);break;
     case FF_OPT_TYPE_RATIONAL:  snprintf(buf, buf_len, "%d/%d", ((AVRational*)dst)->num, ((AVRational*)dst)->den);break;
     case FF_OPT_TYPE_STRING:    return *(void**)dst;
     case FF_OPT_TYPE_BINARY:
         len = *(int*)(((uint8_t *)dst) + sizeof(uint8_t *));

         if (len >= (buf_len + 1)/2) return NULL;

         bin = *(uint8_t**)dst;

         for (i = 0; i < len; i++) snprintf(buf + i*2, 3, "%02X", bin[i]);

         break;
     default: return NULL;
     }
     return buf;
 }
 

 static int av_get_number(void *obj, const char *name, const AVOption **o_out, double *num, int *den, int64_t *intnum)
 {

     const AVOption *o = av_opt_find(obj, name, NULL, 0, 0);

     void *dst;

     if (!o || (o->offset<=0 && o->type != FF_OPT_TYPE_CONST))

         goto error;
 
     dst= ((uint8_t*)obj) + o->offset;
 

     if (o_out) *o_out= o;

     switch (o->type) {

     case FF_OPT_TYPE_FLAGS:     *intnum= *(unsigned int*)dst;return 0;
     case FF_OPT_TYPE_INT:       *intnum= *(int    *)dst;return 0;
     case FF_OPT_TYPE_INT64:     *intnum= *(int64_t*)dst;return 0;
     case FF_OPT_TYPE_FLOAT:     *num=    *(float  *)dst;return 0;
     case FF_OPT_TYPE_DOUBLE:    *num=    *(double *)dst;return 0;
     case FF_OPT_TYPE_RATIONAL:  *intnum= ((AVRational*)dst)->num;
                                 *den   = ((AVRational*)dst)->den;
                                                         return 0;

     case FF_OPT_TYPE_CONST:     *intnum= o->default_val.dbl;return 0;

     }
 error:
     *den=*intnum=0;
     return -1;
 }
 

 double av_get_double(void *obj, const char *name, const AVOption **o_out)
 {

     int64_t intnum=1;
     double num=1;
     int den=1;
 

     if (av_get_number(obj, name, o_out, &num, &den, &intnum) < 0)

         return NAN;

     return num*intnum/den;
 }
 

 AVRational av_get_q(void *obj, const char *name, const AVOption **o_out)
 {

     int64_t intnum=1;
     double num=1;
     int den=1;
 

     if (av_get_number(obj, name, o_out, &num, &den, &intnum) < 0)

         return (AVRational){0, 0};

     if (num == 1.0 && (int)intnum == intnum)

         return (AVRational){intnum, den};
     else
         return av_d2q(num*intnum/den, 1<<24);
 }
 

 int64_t av_get_int(void *obj, const char *name, const AVOption **o_out)
 {

     int64_t intnum=1;
     double num=1;
     int den=1;
 

     if (av_get_number(obj, name, o_out, &num, &den, &intnum) < 0)
         return -1;

     return num*intnum/den;
 }
 

 int av_opt_flag_is_set(void *obj, const char *field_name, const char *flag_name)
 {
     const AVOption *field = av_find_opt(obj, field_name, NULL, 0, 0);
     const AVOption *flag  = av_find_opt(obj, flag_name,  NULL, 0, 0);
 
     if (!field || !flag || flag->type != FF_OPT_TYPE_CONST)
         return 0;
     return av_get_int(obj, field_name, NULL) & (int) flag->default_val.dbl;
 }
 

 static void opt_list(void *obj, void *av_log_obj, const char *unit,
                      int req_flags, int rej_flags)
 {
     const AVOption *opt=NULL;
 

     while ((opt= av_next_option(obj, opt))) {

         if (!(opt->flags & req_flags) || (opt->flags & rej_flags))
             continue;
 
         /* Don't print CONST's on level one.
          * Don't print anything but CONST's on level two.
          * Only print items from the requested unit.
          */
         if (!unit && opt->type==FF_OPT_TYPE_CONST)
             continue;
         else if (unit && opt->type!=FF_OPT_TYPE_CONST)
             continue;
         else if (unit && opt->type==FF_OPT_TYPE_CONST && strcmp(unit, opt->unit))
             continue;
         else if (unit && opt->type == FF_OPT_TYPE_CONST)
             av_log(av_log_obj, AV_LOG_INFO, "   %-15s ", opt->name);
         else
             av_log(av_log_obj, AV_LOG_INFO, "-%-17s ", opt->name);
 

         switch (opt->type) {

             case FF_OPT_TYPE_FLAGS:

                 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<flags>");

                 break;
             case FF_OPT_TYPE_INT:

                 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<int>");

                 break;
             case FF_OPT_TYPE_INT64:

                 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<int64>");

                 break;
             case FF_OPT_TYPE_DOUBLE:

                 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<double>");

                 break;
             case FF_OPT_TYPE_FLOAT:

                 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<float>");

                 break;
             case FF_OPT_TYPE_STRING:

                 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<string>");

                 break;
             case FF_OPT_TYPE_RATIONAL:

                 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<rational>");

                 break;
             case FF_OPT_TYPE_BINARY:

                 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<binary>");

                 break;
             case FF_OPT_TYPE_CONST:
             default:

                 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "");

                 break;
         }
         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_ENCODING_PARAM) ? 'E' : '.');
         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_DECODING_PARAM) ? 'D' : '.');
         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_VIDEO_PARAM   ) ? 'V' : '.');
         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_AUDIO_PARAM   ) ? 'A' : '.');
         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_SUBTITLE_PARAM) ? 'S' : '.');
 

         if (opt->help)

             av_log(av_log_obj, AV_LOG_INFO, " %s", opt->help);
         av_log(av_log_obj, AV_LOG_INFO, "\n");
         if (opt->unit && opt->type != FF_OPT_TYPE_CONST) {
             opt_list(obj, av_log_obj, opt->unit, req_flags, rej_flags);
         }
     }
 }
 
 int av_opt_show2(void *obj, void *av_log_obj, int req_flags, int rej_flags)
 {

     if (!obj)

         return -1;
 
     av_log(av_log_obj, AV_LOG_INFO, "%s AVOptions:\n", (*(AVClass**)obj)->class_name);
 
     opt_list(obj, av_log_obj, NULL, req_flags, rej_flags);
 
     return 0;
 }
 
 /** Set the values of the AVCodecContext or AVFormatContext structure.
  * They are set to the defaults specified in the according AVOption options
  * array default_val field.
  *
  * @param s AVCodecContext or AVFormatContext for which the defaults will be set
  */
 void av_opt_set_defaults2(void *s, int mask, int flags)
 {
     const AVOption *opt = NULL;
     while ((opt = av_next_option(s, opt)) != NULL) {

         if ((opt->flags & mask) != flags)

             continue;

         switch (opt->type) {

             case FF_OPT_TYPE_CONST:
                 /* Nothing to be done here */
             break;
             case FF_OPT_TYPE_FLAGS:
             case FF_OPT_TYPE_INT: {
                 int val;

                 val = opt->default_val.dbl;

                 av_set_int(s, opt->name, val);
             }
             break;
             case FF_OPT_TYPE_INT64:

                 if ((double)(opt->default_val.dbl+0.6) == opt->default_val.dbl)

                     av_log(s, AV_LOG_DEBUG, "loss of precision in default of %s\n", opt->name);

                 av_set_int(s, opt->name, opt->default_val.dbl);

             break;

             case FF_OPT_TYPE_DOUBLE:

             case FF_OPT_TYPE_FLOAT: {
                 double val;

                 val = opt->default_val.dbl;

                 av_set_double(s, opt->name, val);
             }
             break;
             case FF_OPT_TYPE_RATIONAL: {
                 AVRational val;

                 val = av_d2q(opt->default_val.dbl, INT_MAX);

                 av_set_q(s, opt->name, val);
             }
             break;
             case FF_OPT_TYPE_STRING:

                 av_set_string3(s, opt->name, opt->default_val.str, 1, NULL);
                 break;

             case FF_OPT_TYPE_BINARY:

                 /* Cannot set default for binary */

             break;
             default:
                 av_log(s, AV_LOG_DEBUG, "AVOption type %d of option %s not implemented yet\n", opt->type, opt->name);
         }
     }
 }
 

 void av_opt_set_defaults(void *s)
 {

     av_opt_set_defaults2(s, 0, 0);
 }
 

 /**
  * Store the value in the field in ctx that is named like key.
  * ctx must be an AVClass context, storing is done using AVOptions.
  *
  * @param buf the string to parse, buf will be updated to point at the
  * separator just after the parsed key/value pair
  * @param key_val_sep a 0-terminated list of characters used to
  * separate key from value
  * @param pairs_sep a 0-terminated list of characters used to separate
  * two pairs from each other
  * @return 0 if the key/value pair has been successfully parsed and
  * set, or a negative value corresponding to an AVERROR code in case
  * of error:
  * AVERROR(EINVAL) if the key/value pair cannot be parsed,
  * the error code issued by av_set_string3() if the key/value pair
  * cannot be set
  */
 static int parse_key_value_pair(void *ctx, const char **buf,
                                 const char *key_val_sep, const char *pairs_sep)
 {
     char *key = av_get_token(buf, key_val_sep);
     char *val;
     int ret;
 
     if (*key && strspn(*buf, key_val_sep)) {
         (*buf)++;
         val = av_get_token(buf, pairs_sep);
     } else {
         av_log(ctx, AV_LOG_ERROR, "Missing key or no key/value separator found after key '%s'\n", key);
         av_free(key);
         return AVERROR(EINVAL);
     }
 
     av_log(ctx, AV_LOG_DEBUG, "Setting value '%s' for key '%s'\n", val, key);
 
     ret = av_set_string3(ctx, key, val, 1, NULL);

     if (ret == AVERROR_OPTION_NOT_FOUND)

         av_log(ctx, AV_LOG_ERROR, "Key '%s' not found.\n", key);
 
     av_free(key);
     av_free(val);
     return ret;
 }
 
 int av_set_options_string(void *ctx, const char *opts,
                           const char *key_val_sep, const char *pairs_sep)
 {
     int ret, count = 0;
 

     if (!opts)
         return 0;

     while (*opts) {
         if ((ret = parse_key_value_pair(ctx, &opts, key_val_sep, pairs_sep)) < 0)
             return ret;
         count++;
 
         if (*opts)
             opts++;
     }
 
     return count;
 }
 

 void av_opt_free(void *obj)
 {
     const AVOption *o = NULL;
     while ((o = av_next_option(obj, o)))
         if (o->type == FF_OPT_TYPE_STRING || o->type == FF_OPT_TYPE_BINARY)
             av_freep((uint8_t *)obj + o->offset);
 }
 

 int av_opt_set_dict(void *obj, AVDictionary **options)
 {
     AVDictionaryEntry *t = NULL;
     AVDictionary    *tmp = NULL;
     int ret = 0;
 
     while ((t = av_dict_get(*options, "", t, AV_DICT_IGNORE_SUFFIX))) {
         ret = av_set_string3(obj, t->key, t->value, 1, NULL);
         if (ret == AVERROR_OPTION_NOT_FOUND)
             av_dict_set(&tmp, t->key, t->value, 0);
         else if (ret < 0) {
             av_log(obj, AV_LOG_ERROR, "Error setting option %s to value %s.\n", t->key, t->value);
             break;
         }
         ret = 0;
     }
     av_dict_free(options);
     *options = tmp;
     return ret;
 }
 

 const AVOption *av_opt_find(void *obj, const char *name, const char *unit,
                             int opt_flags, int search_flags)
 {
     AVClass *c = *(AVClass**)obj;
     const AVOption *o = NULL;
 
     if (c->opt_find && search_flags & AV_OPT_SEARCH_CHILDREN &&
         (o = c->opt_find(obj, name, unit, opt_flags, search_flags)))
         return o;
 
     while (o = av_next_option(obj, o)) {
         if (!strcmp(o->name, name) && (!unit || (o->unit && !strcmp(o->unit, unit))) &&
             (o->flags & opt_flags) == opt_flags)
             return o;
     }
     return NULL;
 }
 

 #ifdef TEST
 
 #undef printf
 
 typedef struct TestContext
 {
     const AVClass *class;
     int num;
     int toggle;
     char *string;
     int flags;
     AVRational rational;
 } TestContext;
 
 #define OFFSET(x) offsetof(TestContext, x)
 
 #define TEST_FLAG_COOL 01
 #define TEST_FLAG_LAME 02
 #define TEST_FLAG_MU   04
 
 static const AVOption test_options[]= {
 {"num",      "set num",        OFFSET(num),      FF_OPT_TYPE_INT,      0,              0,        100                 },
 {"toggle",   "set toggle",     OFFSET(toggle),   FF_OPT_TYPE_INT,      0,              0,        1                   },
 {"rational", "set rational",   OFFSET(rational), FF_OPT_TYPE_RATIONAL, 0,              0,        10                  },
 {"string",   "set string",     OFFSET(string),   FF_OPT_TYPE_STRING,   0,              CHAR_MIN, CHAR_MAX            },
 {"flags",    "set flags",      OFFSET(flags),    FF_OPT_TYPE_FLAGS,    0,              0,        INT_MAX, 0, "flags" },
 {"cool",     "set cool flag ", 0,                FF_OPT_TYPE_CONST,    TEST_FLAG_COOL, INT_MIN,  INT_MAX, 0, "flags" },
 {"lame",     "set lame flag ", 0,                FF_OPT_TYPE_CONST,    TEST_FLAG_LAME, INT_MIN,  INT_MAX, 0, "flags" },
 {"mu",       "set mu flag ",   0,                FF_OPT_TYPE_CONST,    TEST_FLAG_MU,   INT_MIN,  INT_MAX, 0, "flags" },
 {NULL},
 };
 
 static const char *test_get_name(void *ctx)
 {
     return "test";
 }
 
 static const AVClass test_class = {
     "TestContext",
     test_get_name,
     test_options
 };
 
 int main(void)
 {
     int i;
 
     printf("\nTesting av_set_options_string()\n");
     {
         TestContext test_ctx;
         const char *options[] = {
             "",
             ":",
             "=",
             "foo=:",
             ":=foo",
             "=foo",
             "foo=",
             "foo",
             "foo=val",
             "foo==val",
             "toggle=:",
             "string=:",
             "toggle=1 : foo",
             "toggle=100",
             "toggle==1",
             "flags=+mu-lame : num=42: toggle=0",
             "num=42 : string=blahblah",
             "rational=0 : rational=1/2 : rational=1/-1",
             "rational=-1/0",
         };
 
         test_ctx.class = &test_class;
         av_opt_set_defaults2(&test_ctx, 0, 0);
         test_ctx.string = av_strdup("default");
 
         av_log_set_level(AV_LOG_DEBUG);
 
         for (i=0; i < FF_ARRAY_ELEMS(options); i++) {
             av_log(&test_ctx, AV_LOG_DEBUG, "Setting options string '%s'\n", options[i]);
             if (av_set_options_string(&test_ctx, options[i], "=", ":") < 0)
                 av_log(&test_ctx, AV_LOG_ERROR, "Error setting options string: '%s'\n", options[i]);
             printf("\n");
         }
     }
 
     return 0;
 }
 
 #endif