falkTX
/
FFmpeg
mirror of https://github.com/falkTX/FFmpeg.git
1
0
Fork 0
Code Issues 0 Releases 338 Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
29034 Commits
32 Branches
303MB
Tree: 7e83e1c511
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from '7e83e1c511'
${ noResults }
FFmpeg/libavutil/opt.c

653 lines
21KB
Raw Blame History 

  1. /*

  2.  * AVOptions

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

  4.  *

  5.  * This file is part of Libav.

  6.  *

  7.  * Libav 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.  * Libav 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 Libav; 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. #include "dict.h"

  33. 

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

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

  36. {

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

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

  39. 

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

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

  42.             return o;

  43.     }

  44.     return NULL;

  45. }

  46. 

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

  48. {

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

  50.     else if (last)            return NULL;

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

  52. }

  53. 

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

  55. {

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

  57.     void *dst;

  58.     if (o_out)

  59.         *o_out= o;

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

  61.         return AVERROR_OPTION_NOT_FOUND;

  62. 

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

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

  65.         return AVERROR(ERANGE);

  66.     }

  67. 

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

  69. 

  70.     switch (o->type) {

  71.     case FF_OPT_TYPE_FLAGS:

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

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

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

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

  76.     case FF_OPT_TYPE_RATIONAL:

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

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

  79.         break;

  80.     default:

  81.         return AVERROR(EINVAL);

  82.     }

  83.     return 0;

  84. }

  85. 

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

  87. {

  88.     const AVOption *o = NULL;

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

  90.         return NULL;

  91.     else

  92.         return o;

  93. }

  94. 

  95. static const double const_values[] = {

  96.     M_PI,

  97.     M_E,

  98.     FF_QP2LAMBDA,

  99.     0

  100. };

  101. 

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

  103.     "PI",

  104.     "E",

  105.     "QP2LAMBDA",

  106.     0

  107. };

  108. 

  109. static int hexchar2int(char c) {

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

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

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

  113.     return -1;

  114. }

  115. 

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

  117. {

  118.     int ret;

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

  120.     if (o_out)

  121.         *o_out = o;

  122.     if (!o)

  123.         return AVERROR_OPTION_NOT_FOUND;

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

  125.         return AVERROR(EINVAL);

  126. 

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

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

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

  130.         uint8_t *bin, *ptr;

  131.         int len = strlen(val);

  132.         av_freep(dst);

  133.         *lendst = 0;

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

  135.         len /= 2;

  136.         ptr = bin = av_malloc(len);

  137.         while (*val) {

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

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

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

  141.                 av_free(bin);

  142.                 return AVERROR(EINVAL);

  143.             }

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

  145.         }

  146.         *dst = bin;

  147.         *lendst = len;

  148.         return 0;

  149.     }

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

  151.         int notfirst=0;

  152.         for (;;) {

  153.             int i;

  154.             char buf[256];

  155.             int cmd=0;

  156.             double d;

  157. 

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

  159.                 cmd= *(val++);

  160. 

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

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

  163.             buf[i]=0;

  164. 

  165.             {

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

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

  168.                     d= o_named->default_val.dbl;

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

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

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

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

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

  174.                 else {

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

  176.                     if (res < 0) {

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

  178.                         return res;

  179.                     }

  180.                 }

  181.             }

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

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

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

  185.             } else {

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

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

  188.             }

  189. 

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

  191.                 return ret;

  192.             val+= i;

  193.             if (!*val)

  194.                 return 0;

  195.             notfirst=1;

  196.         }

  197.         return AVERROR(EINVAL);

  198.     }

  199. 

  200.     if (alloc) {

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

  202.         val= av_strdup(val);

  203.     }

  204. 

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

  206.     return 0;

  207. }

  208. 

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

  210. {

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

  212. }

  213. 

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

  215. {

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

  217. }

  218. 

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

  220. {

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

  222. }

  223. 

  224. /**

  225.  *

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

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

  228.  */

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

  230. {

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

  232.     void *dst;

  233.     uint8_t *bin;

  234.     int len, i;

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

  236.         return NULL;

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

  238.         return NULL;

  239. 

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

  241.     if (o_out) *o_out= o;

  242. 

  243.     switch (o->type) {

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

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

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

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

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

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

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

  251.     case FF_OPT_TYPE_BINARY:

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

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

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

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

  256.         break;

  257.     default: return NULL;

  258.     }

  259.     return buf;

  260. }

  261. 

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

  263. {

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

  265.     void *dst;

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

  267.         goto error;

  268. 

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

  270. 

  271.     if (o_out) *o_out= o;

  272. 

  273.     switch (o->type) {

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

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

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

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

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

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

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

  281.                                                         return 0;

  282.     }

  283. error:

  284.     *den=*intnum=0;

  285.     return -1;

  286. }

  287. 

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

  289. {

  290.     int64_t intnum=1;

  291.     double num=1;

  292.     int den=1;

  293. 

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

  295.         return NAN;

  296.     return num*intnum/den;

  297. }

  298. 

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

  300. {

  301.     int64_t intnum=1;

  302.     double num=1;

  303.     int den=1;

  304. 

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

  306.         return (AVRational){0, 0};

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

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

  309.     else

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

  311. }

  312. 

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

  314. {

  315.     int64_t intnum=1;

  316.     double num=1;

  317.     int den=1;

  318. 

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

  320.         return -1;

  321.     return num*intnum/den;

  322. }

  323. 

  324. int av_opt_flag_is_set(void *obj, const char *field_name, const char *flag_name)

  325. {

  326.     const AVOption *field = av_find_opt(obj, field_name, NULL, 0, 0);

  327.     const AVOption *flag  = av_find_opt(obj, flag_name,  NULL, 0, 0);

  328. 

  329.     if (!field || !flag || flag->type != FF_OPT_TYPE_CONST)

  330.         return 0;

  331.     return av_get_int(obj, field_name, NULL) & (int) flag->default_val.dbl;

  332. }

  333. 

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

  335.                      int req_flags, int rej_flags)

  336. {

  337.     const AVOption *opt=NULL;

  338. 

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

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

  341.             continue;

  342. 

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

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

  345.          * Only print items from the requested unit.

  346.          */

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

  348.             continue;

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

  350.             continue;

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

  352.             continue;

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

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

  355.         else

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

  357. 

  358.         switch (opt->type) {

  359.             case FF_OPT_TYPE_FLAGS:

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

  361.                 break;

  362.             case FF_OPT_TYPE_INT:

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

  364.                 break;

  365.             case FF_OPT_TYPE_INT64:

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

  367.                 break;

  368.             case FF_OPT_TYPE_DOUBLE:

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

  370.                 break;

  371.             case FF_OPT_TYPE_FLOAT:

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

  373.                 break;

  374.             case FF_OPT_TYPE_STRING:

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

  376.                 break;

  377.             case FF_OPT_TYPE_RATIONAL:

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

  379.                 break;

  380.             case FF_OPT_TYPE_BINARY:

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

  382.                 break;

  383.             case FF_OPT_TYPE_CONST:

  384.             default:

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

  386.                 break;

  387.         }

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

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

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

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

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

  393. 

  394.         if (opt->help)

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

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

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

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

  399.         }

  400.     }

  401. }

  402. 

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

  404. {

  405.     if (!obj)

  406.         return -1;

  407. 

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

  409. 

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

  411. 

  412.     return 0;

  413. }

  414. 

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

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

  417.  * array default_val field.

  418.  *

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

  420.  */

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

  422. {

  423.     const AVOption *opt = NULL;

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

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

  426.             continue;

  427.         switch (opt->type) {

  428.             case FF_OPT_TYPE_CONST:

  429.                 /* Nothing to be done here */

  430.             break;

  431.             case FF_OPT_TYPE_FLAGS:

  432.             case FF_OPT_TYPE_INT: {

  433.                 int val;

  434.                 val = opt->default_val.dbl;

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

  436.             }

  437.             break;

  438.             case FF_OPT_TYPE_INT64:

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

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

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

  442.             break;

  443.             case FF_OPT_TYPE_DOUBLE:

  444.             case FF_OPT_TYPE_FLOAT: {

  445.                 double val;

  446.                 val = opt->default_val.dbl;

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

  448.             }

  449.             break;

  450.             case FF_OPT_TYPE_RATIONAL: {

  451.                 AVRational val;

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

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

  454.             }

  455.             break;

  456.             case FF_OPT_TYPE_STRING:

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

  458.                 break;

  459.             case FF_OPT_TYPE_BINARY:

  460.                 /* Cannot set default for binary */

  461.             break;

  462.             default:

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

  464.         }

  465.     }

  466. }

  467. 

  468. void av_opt_set_defaults(void *s)

  469. {

  470.     av_opt_set_defaults2(s, 0, 0);

  471. }

  472. 

  473. /**

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

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

  476.  *

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

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

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

  480.  * separate key from value

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

  482.  * two pairs from each other

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

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

  485.  * of error:

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

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

  488.  * cannot be set

  489.  */

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

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

  492. {

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

  494.     char *val;

  495.     int ret;

  496. 

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

  498.         (*buf)++;

  499.         val = av_get_token(buf, pairs_sep);

  500.     } else {

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

  502.         av_free(key);

  503.         return AVERROR(EINVAL);

  504.     }

  505. 

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

  507. 

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

  509.     if (ret == AVERROR_OPTION_NOT_FOUND)

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

  511. 

  512.     av_free(key);

  513.     av_free(val);

  514.     return ret;

  515. }

  516. 

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

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

  519. {

  520.     int ret, count = 0;

  521. 

  522.     while (*opts) {

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

  524.             return ret;

  525.         count++;

  526. 

  527.         if (*opts)

  528.             opts++;

  529.     }

  530. 

  531.     return count;

  532. }

  533. 

  534. void av_opt_free(void *obj)

  535. {

  536.     const AVOption *o = NULL;

  537.     while ((o = av_next_option(obj, o)))

  538.         if (o->type == FF_OPT_TYPE_STRING || o->type == FF_OPT_TYPE_BINARY)

  539.             av_freep((uint8_t *)obj + o->offset);

  540. }

  541. 

  542. int av_opt_set_dict(void *obj, AVDictionary **options)

  543. {

  544.     AVDictionaryEntry *t = NULL;

  545.     AVDictionary    *tmp = NULL;

  546.     int ret = 0;

  547. 

  548.     while ((t = av_dict_get(*options, "", t, AV_DICT_IGNORE_SUFFIX))) {

  549.         ret = av_set_string3(obj, t->key, t->value, 1, NULL);

  550.         if (ret == AVERROR_OPTION_NOT_FOUND)

  551.             av_dict_set(&tmp, t->key, t->value, 0);

  552.         else if (ret < 0) {

  553.             av_log(obj, AV_LOG_ERROR, "Error setting option %s to value %s.\n", t->key, t->value);

  554.             break;

  555.         }

  556.         ret = 0;

  557.     }

  558.     av_dict_free(options);

  559.     *options = tmp;

  560.     return ret;

  561. }

  562. 

  563. #ifdef TEST

  564. 

  565. #undef printf

  566. 

  567. typedef struct TestContext

  568. {

  569.     const AVClass *class;

  570.     int num;

  571.     int toggle;

  572.     char *string;

  573.     int flags;

  574.     AVRational rational;

  575. } TestContext;

  576. 

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

  578. 

  579. #define TEST_FLAG_COOL 01

  580. #define TEST_FLAG_LAME 02

  581. #define TEST_FLAG_MU   04

  582. 

  583. static const AVOption test_options[]= {

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

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

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

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

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

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

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

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

  592. {NULL},

  593. };

  594. 

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

  596. {

  597.     return "test";

  598. }

  599. 

  600. static const AVClass test_class = {

  601.     "TestContext",

  602.     test_get_name,

  603.     test_options

  604. };

  605. 

  606. int main(void)

  607. {

  608.     int i;

  609. 

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

  611.     {

  612.         TestContext test_ctx;

  613.         const char *options[] = {

  614.             "",

  615.             ":",

  616.             "=",

  617.             "foo=:",

  618.             ":=foo",

  619.             "=foo",

  620.             "foo=",

  621.             "foo",

  622.             "foo=val",

  623.             "foo==val",

  624.             "toggle=:",

  625.             "string=:",

  626.             "toggle=1 : foo",

  627.             "toggle=100",

  628.             "toggle==1",

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

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

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

  632.             "rational=-1/0",

  633.         };

  634. 

  635.         test_ctx.class = &test_class;

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

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

  638. 

  639.         av_log_set_level(AV_LOG_DEBUG);

  640. 

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

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

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

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

  645.             printf("\n");

  646.         }

  647.     }

  648. 

  649.     return 0;

  650. }

  651. 

  652. #endif