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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.     AVClass *c= *(AVClass**)v; //FIXME silly way of storing AVClass

  37.     const AVOption *o= c->option;

  38. 

  39.     for (; o && o->name; o++) {

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

  41.             return o;

  42.     }

  43.     return NULL;

  44. }

  45. 

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

  47. {

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

  49.     else if (last)            return NULL;

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

  51. }

  52. 

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

  54. {

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

  56.     void *dst;

  57.     if (o_out)

  58.         *o_out= o;

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

  60.         return AVERROR(ENOENT);

  61. 

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

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

  64.         return AVERROR(ERANGE);

  65.     }

  66. 

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

  68. 

  69.     switch (o->type) {

  70.     case FF_OPT_TYPE_FLAGS:

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

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

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

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

  75.     case FF_OPT_TYPE_RATIONAL:

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

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

  78.         break;

  79.     default:

  80.         return AVERROR(EINVAL);

  81.     }

  82.     return 0;

  83. }

  84. 

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

  86. {

  87.     const AVOption *o = NULL;

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

  89.         return NULL;

  90.     else

  91.         return o;

  92. }

  93. 

  94. static const double const_values[] = {

  95.     M_PI,

  96.     M_E,

  97.     FF_QP2LAMBDA,

  98.     0

  99. };

  100. 

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

  102.     "PI",

  103.     "E",

  104.     "QP2LAMBDA",

  105.     0

  106. };

  107. 

  108. static int hexchar2int(char c) {

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

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

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

  112.     return -1;

  113. }

  114. 

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

  116. {

  117.     int ret;

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

  119.     if (o_out)

  120.         *o_out = o;

  121.     if (!o)

  122.         return AVERROR(ENOENT);

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

  124.         return AVERROR(EINVAL);

  125. 

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

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

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

  129.         uint8_t *bin, *ptr;

  130.         int len = strlen(val);

  131.         av_freep(dst);

  132.         *lendst = 0;

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

  134.         len /= 2;

  135.         ptr = bin = av_malloc(len);

  136.         while (*val) {

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

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

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

  140.                 av_free(bin);

  141.                 return AVERROR(EINVAL);

  142.             }

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

  144.         }

  145.         *dst = bin;

  146.         *lendst = len;

  147.         return 0;

  148.     }

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

  150.         int notfirst=0;

  151.         for (;;) {

  152.             int i;

  153.             char buf[256];

  154.             int cmd=0;

  155.             double d;

  156. 

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

  158.                 cmd= *(val++);

  159. 

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

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

  162.             buf[i]=0;

  163. 

  164.             {

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

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

  167.                     d= o_named->default_val;

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

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

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

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

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

  173.                 else {

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

  175.                     if (res < 0) {

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

  177.                         return res;

  178.                     }

  179.                 }

  180.             }

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

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

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

  184.             } else {

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

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

  187.             }

  188. 

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

  190.                 return ret;

  191.             val+= i;

  192.             if (!*val)

  193.                 return 0;

  194.             notfirst=1;

  195.         }

  196.         return AVERROR(EINVAL);

  197.     }

  198. 

  199.     if (alloc) {

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

  201.         val= av_strdup(val);

  202.     }

  203. 

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

  205.     return 0;

  206. }

  207. 

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

  209. {

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

  211. }

  212. 

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

  214. {

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

  216. }

  217. 

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

  219. {

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

  221. }

  222. 

  223. /**

  224.  *

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

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

  227.  */

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

  229. {

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

  231.     void *dst;

  232.     uint8_t *bin;

  233.     int len, i;

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

  235.         return NULL;

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

  237.         return NULL;

  238. 

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

  240.     if (o_out) *o_out= o;

  241. 

  242.     switch (o->type) {

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

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

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

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

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

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

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

  250.     case FF_OPT_TYPE_BINARY:

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

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

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

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

  255.         break;

  256.     default: return NULL;

  257.     }

  258.     return buf;

  259. }

  260. 

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

  262. {

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

  264.     void *dst;

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

  266.         goto error;

  267. 

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

  269. 

  270.     if (o_out) *o_out= o;

  271. 

  272.     switch (o->type) {

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

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

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

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

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

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

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

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

  317.     return num*intnum/den;

  318. }

  319. 

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

  321.                      int req_flags, int rej_flags)

  322. {

  323.     const AVOption *opt=NULL;

  324. 

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

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

  327.             continue;

  328. 

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

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

  331.          * Only print items from the requested unit.

  332.          */

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

  334.             continue;

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

  336.             continue;

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

  338.             continue;

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

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

  341.         else

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

  343. 

  344.         switch (opt->type) {

  345.             case FF_OPT_TYPE_FLAGS:

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

  347.                 break;

  348.             case FF_OPT_TYPE_INT:

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

  350.                 break;

  351.             case FF_OPT_TYPE_INT64:

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

  353.                 break;

  354.             case FF_OPT_TYPE_DOUBLE:

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

  356.                 break;

  357.             case FF_OPT_TYPE_FLOAT:

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

  359.                 break;

  360.             case FF_OPT_TYPE_STRING:

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

  362.                 break;

  363.             case FF_OPT_TYPE_RATIONAL:

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

  365.                 break;

  366.             case FF_OPT_TYPE_BINARY:

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

  368.                 break;

  369.             case FF_OPT_TYPE_CONST:

  370.             default:

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

  372.                 break;

  373.         }

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

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

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

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

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

  379. 

  380.         if (opt->help)

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

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

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

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

  385.         }

  386.     }

  387. }

  388. 

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

  390. {

  391.     if (!obj)

  392.         return -1;

  393. 

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

  395. 

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

  397. 

  398.     return 0;

  399. }

  400. 

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

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

  403.  * array default_val field.

  404.  *

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

  406.  */

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

  408. {

  409.     const AVOption *opt = NULL;

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

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

  412.             continue;

  413.         switch (opt->type) {

  414.             case FF_OPT_TYPE_CONST:

  415.                 /* Nothing to be done here */

  416.             break;

  417.             case FF_OPT_TYPE_FLAGS:

  418.             case FF_OPT_TYPE_INT: {

  419.                 int val;

  420.                 val = opt->default_val;

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

  422.             }

  423.             break;

  424.             case FF_OPT_TYPE_INT64:

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

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

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

  428.             break;

  429.             case FF_OPT_TYPE_DOUBLE:

  430.             case FF_OPT_TYPE_FLOAT: {

  431.                 double val;

  432.                 val = opt->default_val;

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

  434.             }

  435.             break;

  436.             case FF_OPT_TYPE_RATIONAL: {

  437.                 AVRational val;

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

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

  440.             }

  441.             break;

  442.             case FF_OPT_TYPE_STRING:

  443.             case FF_OPT_TYPE_BINARY:

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

  445.             break;

  446.             default:

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

  448.         }

  449.     }

  450. }

  451. 

  452. void av_opt_set_defaults(void *s)

  453. {

  454.     av_opt_set_defaults2(s, 0, 0);

  455. }

  456. 

  457. /**

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

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

  460.  *

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

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

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

  464.  * separate key from value

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

  466.  * two pairs from each other

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

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

  469.  * of error:

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

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

  472.  * cannot be set

  473.  */

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

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

  476. {

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

  478.     char *val;

  479.     int ret;

  480. 

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

  482.         (*buf)++;

  483.         val = av_get_token(buf, pairs_sep);

  484.     } else {

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

  486.         av_free(key);

  487.         return AVERROR(EINVAL);

  488.     }

  489. 

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

  491. 

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

  493.     if (ret == AVERROR(ENOENT))

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

  495. 

  496.     av_free(key);

  497.     av_free(val);

  498.     return ret;

  499. }

  500. 

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

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

  503. {

  504.     int ret, count = 0;

  505. 

  506.     while (*opts) {

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

  508.             return ret;

  509.         count++;

  510. 

  511.         if (*opts)

  512.             opts++;

  513.     }

  514. 

  515.     return count;

  516. }

  517. 

  518. #ifdef TEST

  519. 

  520. #undef printf

  521. 

  522. typedef struct TestContext

  523. {

  524.     const AVClass *class;

  525.     int num;

  526.     int toggle;

  527.     char *string;

  528.     int flags;

  529.     AVRational rational;

  530. } TestContext;

  531. 

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

  533. 

  534. #define TEST_FLAG_COOL 01

  535. #define TEST_FLAG_LAME 02

  536. #define TEST_FLAG_MU   04

  537. 

  538. static const AVOption test_options[]= {

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

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

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

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

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

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

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

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

  547. {NULL},

  548. };

  549. 

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

  551. {

  552.     return "test";

  553. }

  554. 

  555. static const AVClass test_class = {

  556.     "TestContext",

  557.     test_get_name,

  558.     test_options

  559. };

  560. 

  561. int main(void)

  562. {

  563.     int i;

  564. 

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

  566.     {

  567.         TestContext test_ctx;

  568.         const char *options[] = {

  569.             "",

  570.             ":",

  571.             "=",

  572.             "foo=:",

  573.             ":=foo",

  574.             "=foo",

  575.             "foo=",

  576.             "foo",

  577.             "foo=val",

  578.             "foo==val",

  579.             "toggle=:",

  580.             "string=:",

  581.             "toggle=1 : foo",

  582.             "toggle=100",

  583.             "toggle==1",

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

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

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

  587.             "rational=-1/0",

  588.         };

  589. 

  590.         test_ctx.class = &test_class;

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

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

  593. 

  594.         av_log_set_level(AV_LOG_DEBUG);

  595. 

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

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

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

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

  600.             printf("\n");

  601.         }

  602.     }

  603. 

  604.     return 0;

  605. }

  606. 

  607. #endif