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FFmpeg/libavutil/opt.c

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  1. /*

  2.  * AVOptions

  3.  * Copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at>

  4.  *

  5.  * This file is part of FFmpeg.

  6.  *

  7.  * FFmpeg is free software; you can redistribute it and/or

  8.  * modify it under the terms of the GNU Lesser General Public

  9.  * License as published by the Free Software Foundation; either

  10.  * version 2.1 of the License, or (at your option) any later version.

  11.  *

  12.  * FFmpeg is distributed in the hope that it will be useful,

  13.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  14.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  15.  * Lesser General Public License for more details.

  16.  *

  17.  * You should have received a copy of the GNU Lesser General Public

  18.  * License along with FFmpeg; if not, write to the Free Software

  19.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  20.  */

  21. 

  22. /**

  23.  * @file

  24.  * AVOptions

  25.  * @author Michael Niedermayer <michaelni@gmx.at>

  26.  */

  27. 

  28. #include "avutil.h"

  29. #include "avstring.h"

  30. #include "opt.h"

  31. #include "eval.h"

  32. 

  33. //FIXME order them and do a bin search

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

  35. {

  36.     const AVOption *o = NULL;

  37. 

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

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

  40.             return o;

  41.     }

  42.     return NULL;

  43. }

  44. 

  45. const AVOption *av_next_option(void *obj, const AVOption *last)

  46. {

  47.     if (last && last[1].name) return ++last;

  48.     else if (last)            return NULL;

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

  50. }

  51. 

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

  53. {

  54.     const AVOption *o= av_find_opt(obj, name, NULL, 0, 0);

  55.     void *dst;

  56.     if (o_out)

  57.         *o_out= o;

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

  59.         return AVERROR_OPTION_NOT_FOUND;

  60. 

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

  62.         av_log(obj, AV_LOG_ERROR, "Value %lf for parameter '%s' out of range\n", num, name);

  63.         return AVERROR(ERANGE);

  64.     }

  65. 

  66.     dst= ((uint8_t*)obj) + o->offset;

  67. 

  68.     switch (o->type) {

  69.     case FF_OPT_TYPE_FLAGS:

  70.     case FF_OPT_TYPE_INT:   *(int       *)dst= llrint(num/den)*intnum; break;

  71.     case FF_OPT_TYPE_INT64: *(int64_t   *)dst= llrint(num/den)*intnum; break;

  72.     case FF_OPT_TYPE_FLOAT: *(float     *)dst= num*intnum/den;         break;

  73.     case FF_OPT_TYPE_DOUBLE:*(double    *)dst= num*intnum/den;         break;

  74.     case FF_OPT_TYPE_RATIONAL:

  75.         if ((int)num == num) *(AVRational*)dst= (AVRational){num*intnum, den};

  76.         else                 *(AVRational*)dst= av_d2q(num*intnum/den, 1<<24);

  77.         break;

  78.     default:

  79.         return AVERROR(EINVAL);

  80.     }

  81.     return 0;

  82. }

  83. 

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

  85. {

  86.     const AVOption *o = NULL;

  87.     if (av_set_number2(obj, name, num, den, intnum, &o) < 0)

  88.         return NULL;

  89.     else

  90.         return o;

  91. }

  92. 

  93. static const double const_values[] = {

  94.     M_PI,

  95.     M_E,

  96.     FF_QP2LAMBDA,

  97.     0

  98. };

  99. 

  100. static const char * const const_names[] = {

  101.     "PI",

  102.     "E",

  103.     "QP2LAMBDA",

  104.     0

  105. };

  106. 

  107. static int hexchar2int(char c) {

  108.     if (c >= '0' && c <= '9') return c - '0';

  109.     if (c >= 'a' && c <= 'f') return c - 'a' + 10;

  110.     if (c >= 'A' && c <= 'F') return c - 'A' + 10;

  111.     return -1;

  112. }

  113. 

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

  115. {

  116.     int ret;

  117.     const AVOption *o= av_find_opt(obj, name, NULL, 0, 0);

  118.     if (o_out)

  119.         *o_out = o;

  120.     if (!o)

  121.         return AVERROR_OPTION_NOT_FOUND;

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

  123.         return AVERROR(EINVAL);

  124. 

  125.     if (o->type == FF_OPT_TYPE_BINARY) {

  126.         uint8_t **dst = (uint8_t **)(((uint8_t*)obj) + o->offset);

  127.         int *lendst = (int *)(dst + 1);

  128.         uint8_t *bin, *ptr;

  129.         int len = strlen(val);

  130.         av_freep(dst);

  131.         *lendst = 0;

  132.         if (len & 1) return AVERROR(EINVAL);

  133.         len /= 2;

  134.         ptr = bin = av_malloc(len);

  135.         while (*val) {

  136.             int a = hexchar2int(*val++);

  137.             int b = hexchar2int(*val++);

  138.             if (a < 0 || b < 0) {

  139.                 av_free(bin);

  140.                 return AVERROR(EINVAL);

  141.             }

  142.             *ptr++ = (a << 4) | b;

  143.         }

  144.         *dst = bin;

  145.         *lendst = len;

  146.         return 0;

  147.     }

  148.     if (o->type != FF_OPT_TYPE_STRING) {

  149.         int notfirst=0;

  150.         for (;;) {

  151.             int i;

  152.             char buf[256];

  153.             int cmd=0;

  154.             double d;

  155. 

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

  157.                 cmd= *(val++);

  158. 

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

  160.                 buf[i]= val[i];

  161.             buf[i]=0;

  162. 

  163.             {

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

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

  166.                     d= o_named->default_val.dbl;

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

  168.                 else if (!strcmp(buf, "max"    )) d= o->max;

  169.                 else if (!strcmp(buf, "min"    )) d= o->min;

  170.                 else if (!strcmp(buf, "none"   )) d= 0;

  171.                 else if (!strcmp(buf, "all"    )) d= ~0;

  172.                 else {

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

  174.                     if (res < 0) {

  175.                         av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\"\n", val);

  176.                         return res;

  177.                     }

  178.                 }

  179.             }

  180.             if (o->type == FF_OPT_TYPE_FLAGS) {

  181.                 if      (cmd=='+') d= av_get_int(obj, name, NULL) | (int64_t)d;

  182.                 else if (cmd=='-') d= av_get_int(obj, name, NULL) &~(int64_t)d;

  183.             } else {

  184.                 if      (cmd=='+') d= notfirst*av_get_double(obj, name, NULL) + d;

  185.                 else if (cmd=='-') d= notfirst*av_get_double(obj, name, NULL) - d;

  186.             }

  187. 

  188.             if ((ret = av_set_number2(obj, name, d, 1, 1, o_out)) < 0)

  189.                 return ret;

  190.             val+= i;

  191.             if (!*val)

  192.                 return 0;

  193.             notfirst=1;

  194.         }

  195.         return AVERROR(EINVAL);

  196.     }

  197. 

  198.     if (alloc) {

  199.         av_free(*(void**)(((uint8_t*)obj) + o->offset));

  200.         val= av_strdup(val);

  201.     }

  202. 

  203.     memcpy(((uint8_t*)obj) + o->offset, &val, sizeof(val));

  204.     return 0;

  205. }

  206. 

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

  208. {

  209.     return av_set_number(obj, name, n, 1, 1);

  210. }

  211. 

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

  213. {

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

  215. }

  216. 

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

  218. {

  219.     return av_set_number(obj, name, 1, 1, n);

  220. }

  221. 

  222. /**

  223.  *

  224.  * @param buf a buffer which is used for returning non string values as strings, can be NULL

  225.  * @param buf_len allocated length in bytes of buf

  226.  */

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

  228. {

  229.     const AVOption *o= av_find_opt(obj, name, NULL, 0, 0);

  230.     void *dst;

  231.     uint8_t *bin;

  232.     int len, i;

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

  234.         return NULL;

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

  236.         return NULL;

  237. 

  238.     dst= ((uint8_t*)obj) + o->offset;

  239.     if (o_out) *o_out= o;

  240. 

  241.     switch (o->type) {

  242.     case FF_OPT_TYPE_FLAGS:     snprintf(buf, buf_len, "0x%08X",*(int    *)dst);break;

  243.     case FF_OPT_TYPE_INT:       snprintf(buf, buf_len, "%d" , *(int    *)dst);break;

  244.     case FF_OPT_TYPE_INT64:     snprintf(buf, buf_len, "%"PRId64, *(int64_t*)dst);break;

  245.     case FF_OPT_TYPE_FLOAT:     snprintf(buf, buf_len, "%f" , *(float  *)dst);break;

  246.     case FF_OPT_TYPE_DOUBLE:    snprintf(buf, buf_len, "%f" , *(double *)dst);break;

  247.     case FF_OPT_TYPE_RATIONAL:  snprintf(buf, buf_len, "%d/%d", ((AVRational*)dst)->num, ((AVRational*)dst)->den);break;

  248.     case FF_OPT_TYPE_STRING:    return *(void**)dst;

  249.     case FF_OPT_TYPE_BINARY:

  250.         len = *(int*)(((uint8_t *)dst) + sizeof(uint8_t *));

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

  252.         bin = *(uint8_t**)dst;

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

  254.         break;

  255.     default: return NULL;

  256.     }

  257.     return buf;

  258. }

  259. 

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

  261. {

  262.     const AVOption *o= av_find_opt(obj, name, NULL, 0, 0);

  263.     void *dst;

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

  265.         goto error;

  266. 

  267.     dst= ((uint8_t*)obj) + o->offset;

  268. 

  269.     if (o_out) *o_out= o;

  270. 

  271.     switch (o->type) {

  272.     case FF_OPT_TYPE_FLAGS:     *intnum= *(unsigned int*)dst;return 0;

  273.     case FF_OPT_TYPE_INT:       *intnum= *(int    *)dst;return 0;

  274.     case FF_OPT_TYPE_INT64:     *intnum= *(int64_t*)dst;return 0;

  275.     case FF_OPT_TYPE_FLOAT:     *num=    *(float  *)dst;return 0;

  276.     case FF_OPT_TYPE_DOUBLE:    *num=    *(double *)dst;return 0;

  277.     case FF_OPT_TYPE_RATIONAL:  *intnum= ((AVRational*)dst)->num;

  278.                                 *den   = ((AVRational*)dst)->den;

  279.                                                         return 0;

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

  281.     }

  282. error:

  283.     *den=*intnum=0;

  284.     return -1;

  285. }

  286. 

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

  288. {

  289.     int64_t intnum=1;

  290.     double num=1;

  291.     int den=1;

  292. 

  293.     av_get_number(obj, name, o_out, &num, &den, &intnum);

  294.     return num*intnum/den;

  295. }

  296. 

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

  298. {

  299.     int64_t intnum=1;

  300.     double num=1;

  301.     int den=1;

  302. 

  303.     av_get_number(obj, name, o_out, &num, &den, &intnum);

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

  305.         return (AVRational){intnum, den};

  306.     else

  307.         return av_d2q(num*intnum/den, 1<<24);

  308. }

  309. 

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

  311. {

  312.     int64_t intnum=1;

  313.     double num=1;

  314.     int den=1;

  315. 

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

  317.         return -1;

  318.     return num*intnum/den;

  319. }

  320. 

  321. static void opt_list(void *obj, void *av_log_obj, const char *unit,

  322.                      int req_flags, int rej_flags)

  323. {

  324.     const AVOption *opt=NULL;

  325. 

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

  327.         if (!(opt->flags & req_flags) || (opt->flags & rej_flags))

  328.             continue;

  329. 

  330.         /* Don't print CONST's on level one.

  331.          * Don't print anything but CONST's on level two.

  332.          * Only print items from the requested unit.

  333.          */

  334.         if (!unit && opt->type==FF_OPT_TYPE_CONST)

  335.             continue;

  336.         else if (unit && opt->type!=FF_OPT_TYPE_CONST)

  337.             continue;

  338.         else if (unit && opt->type==FF_OPT_TYPE_CONST && strcmp(unit, opt->unit))

  339.             continue;

  340.         else if (unit && opt->type == FF_OPT_TYPE_CONST)

  341.             av_log(av_log_obj, AV_LOG_INFO, "   %-15s ", opt->name);

  342.         else

  343.             av_log(av_log_obj, AV_LOG_INFO, "-%-17s ", opt->name);

  344. 

  345.         switch (opt->type) {

  346.             case FF_OPT_TYPE_FLAGS:

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

  348.                 break;

  349.             case FF_OPT_TYPE_INT:

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

  351.                 break;

  352.             case FF_OPT_TYPE_INT64:

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

  354.                 break;

  355.             case FF_OPT_TYPE_DOUBLE:

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

  357.                 break;

  358.             case FF_OPT_TYPE_FLOAT:

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

  360.                 break;

  361.             case FF_OPT_TYPE_STRING:

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

  363.                 break;

  364.             case FF_OPT_TYPE_RATIONAL:

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

  366.                 break;

  367.             case FF_OPT_TYPE_BINARY:

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

  369.                 break;

  370.             case FF_OPT_TYPE_CONST:

  371.             default:

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

  373.                 break;

  374.         }

  375.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_ENCODING_PARAM) ? 'E' : '.');

  376.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_DECODING_PARAM) ? 'D' : '.');

  377.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_VIDEO_PARAM   ) ? 'V' : '.');

  378.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_AUDIO_PARAM   ) ? 'A' : '.');

  379.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_SUBTITLE_PARAM) ? 'S' : '.');

  380. 

  381.         if (opt->help)

  382.             av_log(av_log_obj, AV_LOG_INFO, " %s", opt->help);

  383.         av_log(av_log_obj, AV_LOG_INFO, "\n");

  384.         if (opt->unit && opt->type != FF_OPT_TYPE_CONST) {

  385.             opt_list(obj, av_log_obj, opt->unit, req_flags, rej_flags);

  386.         }

  387.     }

  388. }

  389. 

  390. int av_opt_show2(void *obj, void *av_log_obj, int req_flags, int rej_flags)

  391. {

  392.     if (!obj)

  393.         return -1;

  394. 

  395.     av_log(av_log_obj, AV_LOG_INFO, "%s AVOptions:\n", (*(AVClass**)obj)->class_name);

  396. 

  397.     opt_list(obj, av_log_obj, NULL, req_flags, rej_flags);

  398. 

  399.     return 0;

  400. }

  401. 

  402. /** Set the values of the AVCodecContext or AVFormatContext structure.

  403.  * They are set to the defaults specified in the according AVOption options

  404.  * array default_val field.

  405.  *

  406.  * @param s AVCodecContext or AVFormatContext for which the defaults will be set

  407.  */

  408. void av_opt_set_defaults2(void *s, int mask, int flags)

  409. {

  410.     const AVOption *opt = NULL;

  411.     while ((opt = av_next_option(s, opt)) != NULL) {

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

  413.             continue;

  414.         switch (opt->type) {

  415.             case FF_OPT_TYPE_CONST:

  416.                 /* Nothing to be done here */

  417.             break;

  418.             case FF_OPT_TYPE_FLAGS:

  419.             case FF_OPT_TYPE_INT: {

  420.                 int val;

  421.                 val = opt->default_val.dbl;

  422.                 av_set_int(s, opt->name, val);

  423.             }

  424.             break;

  425.             case FF_OPT_TYPE_INT64:

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

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

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

  429.             break;

  430.             case FF_OPT_TYPE_DOUBLE:

  431.             case FF_OPT_TYPE_FLOAT: {

  432.                 double val;

  433.                 val = opt->default_val.dbl;

  434.                 av_set_double(s, opt->name, val);

  435.             }

  436.             break;

  437.             case FF_OPT_TYPE_RATIONAL: {

  438.                 AVRational val;

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

  440.                 av_set_q(s, opt->name, val);

  441.             }

  442.             break;

  443.             case FF_OPT_TYPE_STRING:

  444.             case FF_OPT_TYPE_BINARY:

  445.                 /* Cannot set default for string as default_val is of type * double */

  446.             break;

  447.             default:

  448.                 av_log(s, AV_LOG_DEBUG, "AVOption type %d of option %s not implemented yet\n", opt->type, opt->name);

  449.         }

  450.     }

  451. }

  452. 

  453. void av_opt_set_defaults(void *s)

  454. {

  455.     av_opt_set_defaults2(s, 0, 0);

  456. }

  457. 

  458. /**

  459.  * Store the value in the field in ctx that is named like key.

  460.  * ctx must be an AVClass context, storing is done using AVOptions.

  461.  *

  462.  * @param buf the string to parse, buf will be updated to point at the

  463.  * separator just after the parsed key/value pair

  464.  * @param key_val_sep a 0-terminated list of characters used to

  465.  * separate key from value

  466.  * @param pairs_sep a 0-terminated list of characters used to separate

  467.  * two pairs from each other

  468.  * @return 0 if the key/value pair has been successfully parsed and

  469.  * set, or a negative value corresponding to an AVERROR code in case

  470.  * of error:

  471.  * AVERROR(EINVAL) if the key/value pair cannot be parsed,

  472.  * the error code issued by av_set_string3() if the key/value pair

  473.  * cannot be set

  474.  */

  475. static int parse_key_value_pair(void *ctx, const char **buf,

  476.                                 const char *key_val_sep, const char *pairs_sep)

  477. {

  478.     char *key = av_get_token(buf, key_val_sep);

  479.     char *val;

  480.     int ret;

  481. 

  482.     if (*key && strspn(*buf, key_val_sep)) {

  483.         (*buf)++;

  484.         val = av_get_token(buf, pairs_sep);

  485.     } else {

  486.         av_log(ctx, AV_LOG_ERROR, "Missing key or no key/value separator found after key '%s'\n", key);

  487.         av_free(key);

  488.         return AVERROR(EINVAL);

  489.     }

  490. 

  491.     av_log(ctx, AV_LOG_DEBUG, "Setting value '%s' for key '%s'\n", val, key);

  492. 

  493.     ret = av_set_string3(ctx, key, val, 1, NULL);

  494.     if (ret == AVERROR_OPTION_NOT_FOUND)

  495.         av_log(ctx, AV_LOG_ERROR, "Key '%s' not found.\n", key);

  496. 

  497.     av_free(key);

  498.     av_free(val);

  499.     return ret;

  500. }

  501. 

  502. int av_set_options_string(void *ctx, const char *opts,

  503.                           const char *key_val_sep, const char *pairs_sep)

  504. {

  505.     int ret, count = 0;

  506. 

  507.     while (*opts) {

  508.         if ((ret = parse_key_value_pair(ctx, &opts, key_val_sep, pairs_sep)) < 0)

  509.             return ret;

  510.         count++;

  511. 

  512.         if (*opts)

  513.             opts++;

  514.     }

  515. 

  516.     return count;

  517. }

  518. 

  519. #ifdef TEST

  520. 

  521. #undef printf

  522. 

  523. typedef struct TestContext

  524. {

  525.     const AVClass *class;

  526.     int num;

  527.     int toggle;

  528.     char *string;

  529.     int flags;

  530.     AVRational rational;

  531. } TestContext;

  532. 

  533. #define OFFSET(x) offsetof(TestContext, x)

  534. 

  535. #define TEST_FLAG_COOL 01

  536. #define TEST_FLAG_LAME 02

  537. #define TEST_FLAG_MU   04

  538. 

  539. static const AVOption test_options[]= {

  540. {"num",      "set num",        OFFSET(num),      FF_OPT_TYPE_INT,      0,              0,        100                 },

  541. {"toggle",   "set toggle",     OFFSET(toggle),   FF_OPT_TYPE_INT,      0,              0,        1                   },

  542. {"rational", "set rational",   OFFSET(rational), FF_OPT_TYPE_RATIONAL, 0,              0,        10                  },

  543. {"string",   "set string",     OFFSET(string),   FF_OPT_TYPE_STRING,   0,              CHAR_MIN, CHAR_MAX            },

  544. {"flags",    "set flags",      OFFSET(flags),    FF_OPT_TYPE_FLAGS,    0,              0,        INT_MAX, 0, "flags" },

  545. {"cool",     "set cool flag ", 0,                FF_OPT_TYPE_CONST,    TEST_FLAG_COOL, INT_MIN,  INT_MAX, 0, "flags" },

  546. {"lame",     "set lame flag ", 0,                FF_OPT_TYPE_CONST,    TEST_FLAG_LAME, INT_MIN,  INT_MAX, 0, "flags" },

  547. {"mu",       "set mu flag ",   0,                FF_OPT_TYPE_CONST,    TEST_FLAG_MU,   INT_MIN,  INT_MAX, 0, "flags" },

  548. {NULL},

  549. };

  550. 

  551. static const char *test_get_name(void *ctx)

  552. {

  553.     return "test";

  554. }

  555. 

  556. static const AVClass test_class = {

  557.     "TestContext",

  558.     test_get_name,

  559.     test_options

  560. };

  561. 

  562. int main(void)

  563. {

  564.     int i;

  565. 

  566.     printf("\nTesting av_set_options_string()\n");

  567.     {

  568.         TestContext test_ctx;

  569.         const char *options[] = {

  570.             "",

  571.             ":",

  572.             "=",

  573.             "foo=:",

  574.             ":=foo",

  575.             "=foo",

  576.             "foo=",

  577.             "foo",

  578.             "foo=val",

  579.             "foo==val",

  580.             "toggle=:",

  581.             "string=:",

  582.             "toggle=1 : foo",

  583.             "toggle=100",

  584.             "toggle==1",

  585.             "flags=+mu-lame : num=42: toggle=0",

  586.             "num=42 : string=blahblah",

  587.             "rational=0 : rational=1/2 : rational=1/-1",

  588.             "rational=-1/0",

  589.         };

  590. 

  591.         test_ctx.class = &test_class;

  592.         av_opt_set_defaults2(&test_ctx, 0, 0);

  593.         test_ctx.string = av_strdup("default");

  594. 

  595.         av_log_set_level(AV_LOG_DEBUG);

  596. 

  597.         for (i=0; i < FF_ARRAY_ELEMS(options); i++) {

  598.             av_log(&test_ctx, AV_LOG_DEBUG, "Setting options string '%s'\n", options[i]);

  599.             if (av_set_options_string(&test_ctx, options[i], "=", ":") < 0)

  600.                 av_log(&test_ctx, AV_LOG_ERROR, "Error setting options string: '%s'\n", options[i]);

  601.             printf("\n");

  602.         }

  603.     }

  604. 

  605.     return 0;

  606. }

  607. 

  608. #endif