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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 "common.h"

  31. #include "opt.h"

  32. #include "eval.h"

  33. #include "dict.h"

  34. #include "log.h"

  35. #include "parseutils.h"

  36. #include "pixdesc.h"

  37. #include "mathematics.h"

  38. #include "samplefmt.h"

  39. 

  40. #if FF_API_FIND_OPT

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

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

  43. {

  44.     const AVOption *o = NULL;

  45. 

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

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

  48.             return o;

  49.     }

  50.     return NULL;

  51. }

  52. #endif

  53. 

  54. #if FF_API_OLD_AVOPTIONS

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

  56. {

  57.     return av_opt_next(obj, last);

  58. }

  59. #endif

  60. 

  61. const AVOption *av_opt_next(void *obj, const AVOption *last)

  62. {

  63.     AVClass *class = *(AVClass**)obj;

  64.     if (!last && class->option && class->option[0].name)

  65.         return class->option;

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

  67.     return NULL;

  68. }

  69. 

  70. static int read_number(const AVOption *o, void *dst, double *num, int *den, int64_t *intnum)

  71. {

  72.     switch (o->type) {

  73.     case AV_OPT_TYPE_FLAGS:     *intnum = *(unsigned int*)dst;return 0;

  74.     case AV_OPT_TYPE_INT:       *intnum = *(int         *)dst;return 0;

  75.     case AV_OPT_TYPE_INT64:     *intnum = *(int64_t     *)dst;return 0;

  76.     case AV_OPT_TYPE_FLOAT:     *num    = *(float       *)dst;return 0;

  77.     case AV_OPT_TYPE_DOUBLE:    *num    = *(double      *)dst;return 0;

  78.     case AV_OPT_TYPE_RATIONAL:  *intnum = ((AVRational*)dst)->num;

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

  80.                                                         return 0;

  81.     case AV_OPT_TYPE_CONST:     *num    = o->default_val.dbl; return 0;

  82.     }

  83.     return AVERROR(EINVAL);

  84. }

  85. 

  86. static int write_number(void *obj, const AVOption *o, void *dst, double num, int den, int64_t intnum)

  87. {

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

  89.         av_log(obj, AV_LOG_ERROR, "Value %f for parameter '%s' out of range\n",

  90.                num*intnum/den, o->name);

  91.         return AVERROR(ERANGE);

  92.     }

  93. 

  94.     switch (o->type) {

  95.     case AV_OPT_TYPE_FLAGS:

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

  97.     case AV_OPT_TYPE_INT64: *(int64_t   *)dst= llrint(num/den)*intnum; break;

  98.     case AV_OPT_TYPE_FLOAT: *(float     *)dst= num*intnum/den;         break;

  99.     case AV_OPT_TYPE_DOUBLE:*(double    *)dst= num*intnum/den;         break;

  100.     case AV_OPT_TYPE_RATIONAL:

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

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

  103.         break;

  104.     default:

  105.         return AVERROR(EINVAL);

  106.     }

  107.     return 0;

  108. }

  109. 

  110. static const double const_values[] = {

  111.     M_PI,

  112.     M_E,

  113.     FF_QP2LAMBDA,

  114.     0

  115. };

  116. 

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

  118.     "PI",

  119.     "E",

  120.     "QP2LAMBDA",

  121.     0

  122. };

  123. 

  124. static int hexchar2int(char c) {

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

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

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

  128.     return -1;

  129. }

  130. 

  131. static int set_string_binary(void *obj, const AVOption *o, const char *val, uint8_t **dst)

  132. {

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

  134.     uint8_t *bin, *ptr;

  135.     int len = strlen(val);

  136. 

  137.     av_freep(dst);

  138.     *lendst = 0;

  139. 

  140.     if (len & 1)

  141.         return AVERROR(EINVAL);

  142.     len /= 2;

  143. 

  144.     ptr = bin = av_malloc(len);

  145.     while (*val) {

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

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

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

  149.             av_free(bin);

  150.             return AVERROR(EINVAL);

  151.         }

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

  153.     }

  154.     *dst = bin;

  155.     *lendst = len;

  156. 

  157.     return 0;

  158. }

  159. 

  160. static int set_string(void *obj, const AVOption *o, const char *val, uint8_t **dst)

  161. {

  162.     av_freep(dst);

  163.     *dst = av_strdup(val);

  164.     return 0;

  165. }

  166. 

  167. #define DEFAULT_NUMVAL(opt) ((opt->type == AV_OPT_TYPE_INT64 || \

  168.                               opt->type == AV_OPT_TYPE_CONST || \

  169.                               opt->type == AV_OPT_TYPE_FLAGS || \

  170.                               opt->type == AV_OPT_TYPE_INT) ? \

  171.                              opt->default_val.i64 : opt->default_val.dbl)

  172. 

  173. static int set_string_number(void *obj, const AVOption *o, const char *val, void *dst)

  174. {

  175.     int ret = 0, notfirst = 0;

  176.     for (;;) {

  177.         int i, den = 1;

  178.         char buf[256];

  179.         int cmd = 0;

  180.         double d, num = 1;

  181.         int64_t intnum = 1;

  182. 

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

  184.             cmd = *(val++);

  185. 

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

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

  188.         buf[i] = 0;

  189. 

  190.         {

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

  192.             if (o_named && o_named->type == AV_OPT_TYPE_CONST)

  193.                 d = DEFAULT_NUMVAL(o_named);

  194.             else if (!strcmp(buf, "default")) d = DEFAULT_NUMVAL(o);

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

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

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

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

  199.             else {

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

  201.                 if (res < 0) {

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

  203.                     return res;

  204.                 }

  205.             }

  206.         }

  207.         if (o->type == AV_OPT_TYPE_FLAGS) {

  208.             read_number(o, dst, NULL, NULL, &intnum);

  209.             if      (cmd == '+') d = intnum | (int64_t)d;

  210.             else if (cmd == '-') d = intnum &~(int64_t)d;

  211.         } else {

  212.             read_number(o, dst, &num, &den, &intnum);

  213.             if      (cmd == '+') d = notfirst*num*intnum/den + d;

  214.             else if (cmd == '-') d = notfirst*num*intnum/den - d;

  215.         }

  216. 

  217.         if ((ret = write_number(obj, o, dst, d, 1, 1)) < 0)

  218.             return ret;

  219.         val += i;

  220.         if (!*val)

  221.             return 0;

  222.         notfirst = 1;

  223.     }

  224. 

  225.     return 0;

  226. }

  227. 

  228. #if FF_API_OLD_AVOPTIONS

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

  230. {

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

  232.     if (o_out)

  233.         *o_out = o;

  234.     return av_opt_set(obj, name, val, 0);

  235. }

  236. #endif

  237. 

  238. int av_opt_set(void *obj, const char *name, const char *val, int search_flags)

  239. {

  240.     int ret;

  241.     void *dst, *target_obj;

  242.     const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);

  243.     if (!o || !target_obj)

  244.         return AVERROR_OPTION_NOT_FOUND;

  245.     if (!val && (o->type != AV_OPT_TYPE_STRING && o->type != AV_OPT_TYPE_PIXEL_FMT && o->type != AV_OPT_TYPE_IMAGE_SIZE))

  246.         return AVERROR(EINVAL);

  247. 

  248.     dst = ((uint8_t*)target_obj) + o->offset;

  249.     switch (o->type) {

  250.     case AV_OPT_TYPE_STRING:   return set_string(obj, o, val, dst);

  251.     case AV_OPT_TYPE_BINARY:   return set_string_binary(obj, o, val, dst);

  252.     case AV_OPT_TYPE_FLAGS:

  253.     case AV_OPT_TYPE_INT:

  254.     case AV_OPT_TYPE_INT64:

  255.     case AV_OPT_TYPE_FLOAT:

  256.     case AV_OPT_TYPE_DOUBLE:

  257.     case AV_OPT_TYPE_RATIONAL: return set_string_number(obj, o, val, dst);

  258.     case AV_OPT_TYPE_IMAGE_SIZE:

  259.         if (!val || !strcmp(val, "none")) {

  260.             *(int *)dst = *((int *)dst + 1) = 0;

  261.             return 0;

  262.         }

  263.         ret = av_parse_video_size(dst, ((int *)dst) + 1, val);

  264.         if (ret < 0)

  265.             av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as image size\n", val);

  266.         return ret;

  267.     case AV_OPT_TYPE_PIXEL_FMT:

  268.         if (!val || !strcmp(val, "none"))

  269.             ret = AV_PIX_FMT_NONE;

  270.         else {

  271.             ret = av_get_pix_fmt(val);

  272.             if (ret == AV_PIX_FMT_NONE) {

  273.                 char *tail;

  274.                 ret = strtol(val, &tail, 0);

  275.                 if (*tail || (unsigned)ret >= AV_PIX_FMT_NB) {

  276.                     av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as pixel format\n", val);

  277.                     return AVERROR(EINVAL);

  278.                 }

  279.             }

  280.         }

  281.         *(enum AVPixelFormat *)dst = ret;

  282.         return 0;

  283.     case AV_OPT_TYPE_SAMPLE_FMT:

  284.         if (!val || !strcmp(val, "none")) {

  285.             ret = AV_SAMPLE_FMT_NONE;

  286.         } else {

  287.             ret = av_get_sample_fmt(val);

  288.             if (ret == AV_SAMPLE_FMT_NONE) {

  289.                 char *tail;

  290.                 ret = strtol(val, &tail, 0);

  291.                 if (*tail || (unsigned)ret >= AV_SAMPLE_FMT_NB) {

  292.                     av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as sample format\n", val);

  293.                     return AVERROR(EINVAL);

  294.                 }

  295.             }

  296.         }

  297.         *(enum AVSampleFormat *)dst = ret;

  298.         return 0;

  299.     }

  300. 

  301.     av_log(obj, AV_LOG_ERROR, "Invalid option type.\n");

  302.     return AVERROR(EINVAL);

  303. }

  304. 

  305. #define OPT_EVAL_NUMBER(name, opttype, vartype)\

  306.     int av_opt_eval_ ## name(void *obj, const AVOption *o, const char *val, vartype *name ## _out)\

  307.     {\

  308.         if (!o || o->type != opttype)\

  309.             return AVERROR(EINVAL);\

  310.         return set_string_number(obj, o, val, name ## _out);\

  311.     }

  312. 

  313. OPT_EVAL_NUMBER(flags,  AV_OPT_TYPE_FLAGS,    int)

  314. OPT_EVAL_NUMBER(int,    AV_OPT_TYPE_INT,      int)

  315. OPT_EVAL_NUMBER(int64,  AV_OPT_TYPE_INT64,    int64_t)

  316. OPT_EVAL_NUMBER(float,  AV_OPT_TYPE_FLOAT,    float)

  317. OPT_EVAL_NUMBER(double, AV_OPT_TYPE_DOUBLE,   double)

  318. OPT_EVAL_NUMBER(q,      AV_OPT_TYPE_RATIONAL, AVRational)

  319. 

  320. static int set_number(void *obj, const char *name, double num, int den, int64_t intnum,

  321.                                   int search_flags)

  322. {

  323.     void *dst, *target_obj;

  324.     const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);

  325. 

  326.     if (!o || !target_obj)

  327.         return AVERROR_OPTION_NOT_FOUND;

  328. 

  329.     dst = ((uint8_t*)target_obj) + o->offset;

  330.     return write_number(obj, o, dst, num, den, intnum);

  331. }

  332. 

  333. #if FF_API_OLD_AVOPTIONS

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

  335. {

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

  337.     if (set_number(obj, name, n, 1, 1, 0) < 0)

  338.         return NULL;

  339.     return o;

  340. }

  341. 

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

  343. {

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

  345.     if (set_number(obj, name, n.num, n.den, 1, 0) < 0)

  346.         return NULL;

  347.     return o;

  348. }

  349. 

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

  351. {

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

  353.     if (set_number(obj, name, 1, 1, n, 0) < 0)

  354.         return NULL;

  355.     return o;

  356. }

  357. #endif

  358. 

  359. int av_opt_set_int(void *obj, const char *name, int64_t val, int search_flags)

  360. {

  361.     return set_number(obj, name, 1, 1, val, search_flags);

  362. }

  363. 

  364. int av_opt_set_double(void *obj, const char *name, double val, int search_flags)

  365. {

  366.     return set_number(obj, name, val, 1, 1, search_flags);

  367. }

  368. 

  369. int av_opt_set_q(void *obj, const char *name, AVRational val, int search_flags)

  370. {

  371.     return set_number(obj, name, val.num, val.den, 1, search_flags);

  372. }

  373. 

  374. int av_opt_set_bin(void *obj, const char *name, const uint8_t *val, int len, int search_flags)

  375. {

  376.     void *target_obj;

  377.     const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);

  378.     uint8_t *ptr;

  379.     uint8_t **dst;

  380.     int *lendst;

  381. 

  382.     if (!o || !target_obj)

  383.         return AVERROR_OPTION_NOT_FOUND;

  384. 

  385.     if (o->type != AV_OPT_TYPE_BINARY)

  386.         return AVERROR(EINVAL);

  387. 

  388.     ptr = av_malloc(len);

  389.     if (!ptr)

  390.         return AVERROR(ENOMEM);

  391. 

  392.     dst = (uint8_t **)(((uint8_t *)target_obj) + o->offset);

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

  394. 

  395.     av_free(*dst);

  396.     *dst = ptr;

  397.     *lendst = len;

  398.     memcpy(ptr, val, len);

  399. 

  400.     return 0;

  401. }

  402. 

  403. #if FF_API_OLD_AVOPTIONS

  404. /**

  405.  *

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

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

  408.  */

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

  410. {

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

  412.     void *dst;

  413.     uint8_t *bin;

  414.     int len, i;

  415.     if (!o)

  416.         return NULL;

  417.     if (o->type != AV_OPT_TYPE_STRING && (!buf || !buf_len))

  418.         return NULL;

  419. 

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

  421.     if (o_out) *o_out= o;

  422. 

  423.     switch (o->type) {

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

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

  426.     case AV_OPT_TYPE_INT64:     snprintf(buf, buf_len, "%"PRId64, *(int64_t*)dst);break;

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

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

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

  430.     case AV_OPT_TYPE_CONST:     snprintf(buf, buf_len, "%f" , o->default_val.dbl);break;

  431.     case AV_OPT_TYPE_STRING:    return *(void**)dst;

  432.     case AV_OPT_TYPE_BINARY:

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

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

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

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

  437.         break;

  438.     default: return NULL;

  439.     }

  440.     return buf;

  441. }

  442. #endif

  443. 

  444. int av_opt_get(void *obj, const char *name, int search_flags, uint8_t **out_val)

  445. {

  446.     void *dst, *target_obj;

  447.     const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);

  448.     uint8_t *bin, buf[128];

  449.     int len, i, ret;

  450. 

  451.     if (!o || !target_obj || (o->offset<=0 && o->type != AV_OPT_TYPE_CONST))

  452.         return AVERROR_OPTION_NOT_FOUND;

  453. 

  454.     dst = (uint8_t*)target_obj + o->offset;

  455. 

  456.     buf[0] = 0;

  457.     switch (o->type) {

  458.     case AV_OPT_TYPE_FLAGS:     ret = snprintf(buf, sizeof(buf), "0x%08X",  *(int    *)dst);break;

  459.     case AV_OPT_TYPE_INT:       ret = snprintf(buf, sizeof(buf), "%d" ,     *(int    *)dst);break;

  460.     case AV_OPT_TYPE_INT64:     ret = snprintf(buf, sizeof(buf), "%"PRId64, *(int64_t*)dst);break;

  461.     case AV_OPT_TYPE_FLOAT:     ret = snprintf(buf, sizeof(buf), "%f" ,     *(float  *)dst);break;

  462.     case AV_OPT_TYPE_DOUBLE:    ret = snprintf(buf, sizeof(buf), "%f" ,     *(double *)dst);break;

  463.     case AV_OPT_TYPE_RATIONAL:  ret = snprintf(buf, sizeof(buf), "%d/%d",   ((AVRational*)dst)->num, ((AVRational*)dst)->den);break;

  464.     case AV_OPT_TYPE_CONST:     ret = snprintf(buf, sizeof(buf), "%f" ,     o->default_val.dbl);break;

  465.     case AV_OPT_TYPE_STRING:

  466.         if (*(uint8_t**)dst)

  467.             *out_val = av_strdup(*(uint8_t**)dst);

  468.         else

  469.             *out_val = av_strdup("");

  470.         return 0;

  471.     case AV_OPT_TYPE_BINARY:

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

  473.         if ((uint64_t)len*2 + 1 > INT_MAX)

  474.             return AVERROR(EINVAL);

  475.         if (!(*out_val = av_malloc(len*2 + 1)))

  476.             return AVERROR(ENOMEM);

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

  478.         for (i = 0; i < len; i++)

  479.             snprintf(*out_val + i*2, 3, "%02X", bin[i]);

  480.         return 0;

  481.     case AV_OPT_TYPE_IMAGE_SIZE:

  482.         ret = snprintf(buf, sizeof(buf), "%dx%d", ((int *)dst)[0], ((int *)dst)[1]);

  483.         break;

  484.     case AV_OPT_TYPE_PIXEL_FMT:

  485.         ret = snprintf(buf, sizeof(buf), "%s", (char *)av_x_if_null(av_get_pix_fmt_name(*(enum AVPixelFormat *)dst), "none"));

  486.         break;

  487.     case AV_OPT_TYPE_SAMPLE_FMT:

  488.         ret = snprintf(buf, sizeof(buf), "%s", (char *)av_x_if_null(av_get_sample_fmt_name(*(enum AVSampleFormat *)dst), "none"));

  489.         break;

  490.     default:

  491.         return AVERROR(EINVAL);

  492.     }

  493. 

  494.     if (ret >= sizeof(buf))

  495.         return AVERROR(EINVAL);

  496.     *out_val = av_strdup(buf);

  497.     return 0;

  498. }

  499. 

  500. static int get_number(void *obj, const char *name, const AVOption **o_out, double *num, int *den, int64_t *intnum,

  501.                       int search_flags)

  502. {

  503.     void *dst, *target_obj;

  504.     const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);

  505.     if (!o || !target_obj)

  506.         goto error;

  507. 

  508.     dst = ((uint8_t*)target_obj) + o->offset;

  509. 

  510.     if (o_out) *o_out= o;

  511. 

  512.     return read_number(o, dst, num, den, intnum);

  513. 

  514. error:

  515.     *den=*intnum=0;

  516.     return -1;

  517. }

  518. 

  519. #if FF_API_OLD_AVOPTIONS

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

  521. {

  522.     int64_t intnum=1;

  523.     double num=1;

  524.     int den=1;

  525. 

  526.     if (get_number(obj, name, o_out, &num, &den, &intnum, 0) < 0)

  527.         return NAN;

  528.     return num*intnum/den;

  529. }

  530. 

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

  532. {

  533.     int64_t intnum=1;

  534.     double num=1;

  535.     int den=1;

  536. 

  537.     if (get_number(obj, name, o_out, &num, &den, &intnum, 0) < 0)

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

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

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

  541.     else

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

  543. }

  544. 

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

  546. {

  547.     int64_t intnum=1;

  548.     double num=1;

  549.     int den=1;

  550. 

  551.     if (get_number(obj, name, o_out, &num, &den, &intnum, 0) < 0)

  552.         return -1;

  553.     return num*intnum/den;

  554. }

  555. #endif

  556. 

  557. int av_opt_get_int(void *obj, const char *name, int search_flags, int64_t *out_val)

  558. {

  559.     int64_t intnum = 1;

  560.     double     num = 1;

  561.     int   ret, den = 1;

  562. 

  563.     if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0)

  564.         return ret;

  565.     *out_val = num*intnum/den;

  566.     return 0;

  567. }

  568. 

  569. int av_opt_get_double(void *obj, const char *name, int search_flags, double *out_val)

  570. {

  571.     int64_t intnum = 1;

  572.     double     num = 1;

  573.     int   ret, den = 1;

  574. 

  575.     if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0)

  576.         return ret;

  577.     *out_val = num*intnum/den;

  578.     return 0;

  579. }

  580. 

  581. int av_opt_get_q(void *obj, const char *name, int search_flags, AVRational *out_val)

  582. {

  583.     int64_t intnum = 1;

  584.     double     num = 1;

  585.     int   ret, den = 1;

  586. 

  587.     if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0)

  588.         return ret;

  589. 

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

  591.         *out_val = (AVRational){intnum, den};

  592.     else

  593.         *out_val = av_d2q(num*intnum/den, 1<<24);

  594.     return 0;

  595. }

  596. 

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

  598. {

  599.     const AVOption *field = av_opt_find(obj, field_name, NULL, 0, 0);

  600.     const AVOption *flag  = av_opt_find(obj, flag_name,

  601.                                         field ? field->unit : NULL, 0, 0);

  602.     int64_t res;

  603. 

  604.     if (!field || !flag || flag->type != AV_OPT_TYPE_CONST ||

  605.         av_opt_get_int(obj, field_name, 0, &res) < 0)

  606.         return 0;

  607.     return res & flag->default_val.i64;

  608. }

  609. 

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

  611.                      int req_flags, int rej_flags)

  612. {

  613.     const AVOption *opt=NULL;

  614. 

  615.     while ((opt = av_opt_next(obj, opt))) {

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

  617.             continue;

  618. 

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

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

  621.          * Only print items from the requested unit.

  622.          */

  623.         if (!unit && opt->type==AV_OPT_TYPE_CONST)

  624.             continue;

  625.         else if (unit && opt->type!=AV_OPT_TYPE_CONST)

  626.             continue;

  627.         else if (unit && opt->type==AV_OPT_TYPE_CONST && strcmp(unit, opt->unit))

  628.             continue;

  629.         else if (unit && opt->type == AV_OPT_TYPE_CONST)

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

  631.         else

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

  633. 

  634.         switch (opt->type) {

  635.             case AV_OPT_TYPE_FLAGS:

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

  637.                 break;

  638.             case AV_OPT_TYPE_INT:

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

  640.                 break;

  641.             case AV_OPT_TYPE_INT64:

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

  643.                 break;

  644.             case AV_OPT_TYPE_DOUBLE:

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

  646.                 break;

  647.             case AV_OPT_TYPE_FLOAT:

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

  649.                 break;

  650.             case AV_OPT_TYPE_STRING:

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

  652.                 break;

  653.             case AV_OPT_TYPE_RATIONAL:

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

  655.                 break;

  656.             case AV_OPT_TYPE_BINARY:

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

  658.                 break;

  659.             case AV_OPT_TYPE_IMAGE_SIZE:

  660.                 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<image_size>");

  661.                 break;

  662.             case AV_OPT_TYPE_PIXEL_FMT:

  663.                 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<pix_fmt>");

  664.                 break;

  665.             case AV_OPT_TYPE_SAMPLE_FMT:

  666.                 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<sample_fmt>");

  667.                 break;

  668.             case AV_OPT_TYPE_CONST:

  669.             default:

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

  671.                 break;

  672.         }

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

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

  675.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_FILTERING_PARAM)? 'F' : '.');

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

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

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

  679. 

  680.         if (opt->help)

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

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

  683.         if (opt->unit && opt->type != AV_OPT_TYPE_CONST) {

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

  685.         }

  686.     }

  687. }

  688. 

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

  690. {

  691.     if (!obj)

  692.         return -1;

  693. 

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

  695. 

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

  697. 

  698.     return 0;

  699. }

  700. 

  701. void av_opt_set_defaults(void *s)

  702. {

  703. #if FF_API_OLD_AVOPTIONS

  704.     av_opt_set_defaults2(s, 0, 0);

  705. }

  706. 

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

  708. {

  709. #endif

  710.     const AVOption *opt = NULL;

  711.     while ((opt = av_opt_next(s, opt)) != NULL) {

  712. #if FF_API_OLD_AVOPTIONS

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

  714.             continue;

  715. #endif

  716.         switch (opt->type) {

  717.             case AV_OPT_TYPE_CONST:

  718.                 /* Nothing to be done here */

  719.             break;

  720.             case AV_OPT_TYPE_FLAGS:

  721.             case AV_OPT_TYPE_INT:

  722.             case AV_OPT_TYPE_INT64:

  723.                 av_opt_set_int(s, opt->name, opt->default_val.i64, 0);

  724.             break;

  725.             case AV_OPT_TYPE_DOUBLE:

  726.             case AV_OPT_TYPE_FLOAT: {

  727.                 double val;

  728.                 val = opt->default_val.dbl;

  729.                 av_opt_set_double(s, opt->name, val, 0);

  730.             }

  731.             break;

  732.             case AV_OPT_TYPE_RATIONAL: {

  733.                 AVRational val;

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

  735.                 av_opt_set_q(s, opt->name, val, 0);

  736.             }

  737.             break;

  738.             case AV_OPT_TYPE_STRING:

  739.             case AV_OPT_TYPE_IMAGE_SIZE:

  740.             case AV_OPT_TYPE_PIXEL_FMT:

  741.                 av_opt_set(s, opt->name, opt->default_val.str, 0);

  742.                 break;

  743.             case AV_OPT_TYPE_BINARY:

  744.                 /* Cannot set default for binary */

  745.             break;

  746.             default:

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

  748.         }

  749.     }

  750. }

  751. 

  752. /**

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

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

  755.  *

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

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

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

  759.  * separate key from value

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

  761.  * two pairs from each other

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

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

  764.  * of error:

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

  766.  * the error code issued by av_opt_set() if the key/value pair

  767.  * cannot be set

  768.  */

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

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

  771. {

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

  773.     char *val;

  774.     int ret;

  775. 

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

  777.         (*buf)++;

  778.         val = av_get_token(buf, pairs_sep);

  779.     } else {

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

  781.         av_free(key);

  782.         return AVERROR(EINVAL);

  783.     }

  784. 

  785.     av_log(ctx, AV_LOG_DEBUG, "Setting entry with key '%s' to value '%s'\n", key, val);

  786. 

  787.     ret = av_opt_set(ctx, key, val, 0);

  788.     if (ret == AVERROR_OPTION_NOT_FOUND)

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

  790. 

  791.     av_free(key);

  792.     av_free(val);

  793.     return ret;

  794. }

  795. 

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

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

  798. {

  799.     int ret, count = 0;

  800. 

  801.     if (!opts)

  802.         return 0;

  803. 

  804.     while (*opts) {

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

  806.             return ret;

  807.         count++;

  808. 

  809.         if (*opts)

  810.             opts++;

  811.     }

  812. 

  813.     return count;

  814. }

  815. 

  816. #define WHITESPACES " \n\t"

  817. 

  818. static int is_key_char(char c)

  819. {

  820.     return (unsigned)((c | 32) - 'a') < 26 ||

  821.            (unsigned)(c - '0') < 10 ||

  822.            c == '-' || c == '_' || c == '/' || c == '.';

  823. }

  824. 

  825. /**

  826.  * Read a key from a string.

  827.  *

  828.  * The key consists of is_key_char characters and must be terminated by a

  829.  * character from the delim string; spaces are ignored. The key buffer must

  830.  * be 4 bytes larger than the longest acceptable key. If the key is too

  831.  * long, an ellipsis will be written at the end.

  832.  *

  833.  * @return  0 for success (even with ellipsis), <0 for failure

  834.  */

  835. static int get_key(const char **ropts, const char *delim, char *key, unsigned key_size)

  836. {

  837.     unsigned key_pos = 0;

  838.     const char *opts = *ropts;

  839. 

  840.     opts += strspn(opts, WHITESPACES);

  841.     while (is_key_char(*opts)) {

  842.         key[key_pos++] = *opts;

  843.         if (key_pos == key_size)

  844.             key_pos--;

  845.         (opts)++;

  846.     }

  847.     opts += strspn(opts, WHITESPACES);

  848.     if (!*opts || !strchr(delim, *opts))

  849.         return AVERROR(EINVAL);

  850.     opts++;

  851.     key[key_pos++] = 0;

  852.     if (key_pos == key_size)

  853.         key[key_pos - 4] = key[key_pos - 3] = key[key_pos - 2] = '.';

  854.     *ropts = opts;

  855.     return 0;

  856. }

  857. 

  858. int av_opt_set_from_string(void *ctx, const char *opts,

  859.                            const char *const *shorthand,

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

  861. {

  862.     int ret, count = 0;

  863.     const char *dummy_shorthand = NULL;

  864.     char key_buf[68], *value;

  865.     const char *key;

  866. 

  867.     if (!opts)

  868.         return 0;

  869.     if (!shorthand)

  870.         shorthand = &dummy_shorthand;

  871. 

  872.     while (*opts) {

  873.         if ((ret = get_key(&opts, key_val_sep, key_buf, sizeof(key_buf))) < 0) {

  874.             if (*shorthand) {

  875.                 key = *(shorthand++);

  876.             } else {

  877.                 av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", opts);

  878.                 return AVERROR(EINVAL);

  879.             }

  880.         } else {

  881.             key = key_buf;

  882.             while (*shorthand) /* discard all remaining shorthand */

  883.                 shorthand++;

  884.         }

  885. 

  886.         if (!(value = av_get_token(&opts, pairs_sep)))

  887.             return AVERROR(ENOMEM);

  888.         if (*opts && strchr(pairs_sep, *opts))

  889.             opts++;

  890. 

  891.         av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);

  892.         if ((ret = av_opt_set(ctx, key, value, 0)) < 0) {

  893.             if (ret == AVERROR_OPTION_NOT_FOUND)

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

  895.             av_free(value);

  896.             return ret;

  897.         }

  898. 

  899.         av_free(value);

  900.         count++;

  901.     }

  902.     return count;

  903. }

  904. 

  905. void av_opt_free(void *obj)

  906. {

  907.     const AVOption *o = NULL;

  908.     while ((o = av_opt_next(obj, o)))

  909.         if (o->type == AV_OPT_TYPE_STRING || o->type == AV_OPT_TYPE_BINARY)

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

  911. }

  912. 

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

  914. {

  915.     AVDictionaryEntry *t = NULL;

  916.     AVDictionary    *tmp = NULL;

  917.     int ret = 0;

  918. 

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

  920.         ret = av_opt_set(obj, t->key, t->value, 0);

  921.         if (ret == AVERROR_OPTION_NOT_FOUND)

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

  923.         else if (ret < 0) {

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

  925.             break;

  926.         }

  927.         ret = 0;

  928.     }

  929.     av_dict_free(options);

  930.     *options = tmp;

  931.     return ret;

  932. }

  933. 

  934. const AVOption *av_opt_find(void *obj, const char *name, const char *unit,

  935.                             int opt_flags, int search_flags)

  936. {

  937.     return av_opt_find2(obj, name, unit, opt_flags, search_flags, NULL);

  938. }

  939. 

  940. const AVOption *av_opt_find2(void *obj, const char *name, const char *unit,

  941.                              int opt_flags, int search_flags, void **target_obj)

  942. {

  943.     const AVClass  *c;

  944.     const AVOption *o = NULL;

  945. 

  946.     if(!obj)

  947.         return NULL;

  948. 

  949.     c= *(AVClass**)obj;

  950. 

  951.     if (search_flags & AV_OPT_SEARCH_CHILDREN) {

  952.         if (search_flags & AV_OPT_SEARCH_FAKE_OBJ) {

  953.             const AVClass *child = NULL;

  954.             while (child = av_opt_child_class_next(c, child))

  955.                 if (o = av_opt_find2(&child, name, unit, opt_flags, search_flags, NULL))

  956.                     return o;

  957.         } else {

  958.             void *child = NULL;

  959.             while (child = av_opt_child_next(obj, child))

  960.                 if (o = av_opt_find2(child, name, unit, opt_flags, search_flags, target_obj))

  961.                     return o;

  962.         }

  963.     }

  964. 

  965.     while (o = av_opt_next(obj, o)) {

  966.         if (!strcmp(o->name, name) && (o->flags & opt_flags) == opt_flags &&

  967.             ((!unit && o->type != AV_OPT_TYPE_CONST) ||

  968.              (unit  && o->type == AV_OPT_TYPE_CONST && o->unit && !strcmp(o->unit, unit)))) {

  969.             if (target_obj) {

  970.                 if (!(search_flags & AV_OPT_SEARCH_FAKE_OBJ))

  971.                     *target_obj = obj;

  972.                 else

  973.                     *target_obj = NULL;

  974.             }

  975.             return o;

  976.         }

  977.     }

  978.     return NULL;

  979. }

  980. 

  981. void *av_opt_child_next(void *obj, void *prev)

  982. {

  983.     const AVClass *c = *(AVClass**)obj;

  984.     if (c->child_next)

  985.         return c->child_next(obj, prev);

  986.     return NULL;

  987. }

  988. 

  989. const AVClass *av_opt_child_class_next(const AVClass *parent, const AVClass *prev)

  990. {

  991.     if (parent->child_class_next)

  992.         return parent->child_class_next(prev);

  993.     return NULL;

  994. }

  995. 

  996. void *av_opt_ptr(const AVClass *class, void *obj, const char *name)

  997. {

  998.     const AVOption *opt= av_opt_find2(&class, name, NULL, 0, AV_OPT_SEARCH_FAKE_OBJ, NULL);

  999.     if(!opt)

  1000.         return NULL;

  1001.     return (uint8_t*)obj + opt->offset;

  1002. }

  1003. 

  1004. #ifdef TEST

  1005. 

  1006. #undef printf

  1007. 

  1008. typedef struct TestContext

  1009. {

  1010.     const AVClass *class;

  1011.     int num;

  1012.     int toggle;

  1013.     char *string;

  1014.     int flags;

  1015.     AVRational rational;

  1016.     int w, h;

  1017.     enum AVPixelFormat pix_fmt;

  1018.     enum AVSampleFormat sample_fmt;

  1019. } TestContext;

  1020. 

  1021. #define OFFSET(x) offsetof(TestContext, x)

  1022. 

  1023. #define TEST_FLAG_COOL 01

  1024. #define TEST_FLAG_LAME 02

  1025. #define TEST_FLAG_MU   04

  1026. 

  1027. static const AVOption test_options[]= {

  1028. {"num",      "set num",        OFFSET(num),      AV_OPT_TYPE_INT,      {.i64 = 0},       0,        100                 },

  1029. {"toggle",   "set toggle",     OFFSET(toggle),   AV_OPT_TYPE_INT,      {.i64 = 0},       0,        1                   },

  1030. {"rational", "set rational",   OFFSET(rational), AV_OPT_TYPE_RATIONAL, {.dbl = 0},  0,        10                  },

  1031. {"string",   "set string",     OFFSET(string),   AV_OPT_TYPE_STRING,   {0},              CHAR_MIN, CHAR_MAX            },

  1032. {"flags",    "set flags",      OFFSET(flags),    AV_OPT_TYPE_FLAGS,    {.i64 = 0},       0,        INT_MAX, 0, "flags" },

  1033. {"cool",     "set cool flag ", 0,                AV_OPT_TYPE_CONST,    {.i64 = TEST_FLAG_COOL}, INT_MIN,  INT_MAX, 0, "flags" },

  1034. {"lame",     "set lame flag ", 0,                AV_OPT_TYPE_CONST,    {.i64 = TEST_FLAG_LAME}, INT_MIN,  INT_MAX, 0, "flags" },

  1035. {"mu",       "set mu flag ",   0,                AV_OPT_TYPE_CONST,    {.i64 = TEST_FLAG_MU},   INT_MIN,  INT_MAX, 0, "flags" },

  1036. {"size",     "set size",       OFFSET(w),        AV_OPT_TYPE_IMAGE_SIZE,{0},             0,        0                   },

  1037. {"pix_fmt",  "set pixfmt",     OFFSET(pix_fmt),  AV_OPT_TYPE_PIXEL_FMT,{0},              0,        0                   },

  1038. {"sample_fmt", "set samplefmt", OFFSET(sample_fmt), AV_OPT_TYPE_SAMPLE_FMT,{0},          0,        0                   },

  1039. {NULL},

  1040. };

  1041. 

  1042. static const char *test_get_name(void *ctx)

  1043. {

  1044.     return "test";

  1045. }

  1046. 

  1047. static const AVClass test_class = {

  1048.     "TestContext",

  1049.     test_get_name,

  1050.     test_options

  1051. };

  1052. 

  1053. int main(void)

  1054. {

  1055.     int i;

  1056. 

  1057.     printf("\nTesting av_set_options_string()\n");

  1058.     {

  1059.         TestContext test_ctx = { 0 };

  1060.         const char *options[] = {

  1061.             "",

  1062.             ":",

  1063.             "=",

  1064.             "foo=:",

  1065.             ":=foo",

  1066.             "=foo",

  1067.             "foo=",

  1068.             "foo",

  1069.             "foo=val",

  1070.             "foo==val",

  1071.             "toggle=:",

  1072.             "string=:",

  1073.             "toggle=1 : foo",

  1074.             "toggle=100",

  1075.             "toggle==1",

  1076.             "flags=+mu-lame : num=42: toggle=0",

  1077.             "num=42 : string=blahblah",

  1078.             "rational=0 : rational=1/2 : rational=1/-1",

  1079.             "rational=-1/0",

  1080.             "size=1024x768",

  1081.             "size=pal",

  1082.             "size=bogus",

  1083.             "pix_fmt=yuv420p",

  1084.             "pix_fmt=2",

  1085.             "pix_fmt=bogus",

  1086.             "sample_fmt=s16",

  1087.             "sample_fmt=2",

  1088.             "sample_fmt=bogus",

  1089.         };

  1090. 

  1091.         test_ctx.class = &test_class;

  1092.         av_opt_set_defaults(&test_ctx);

  1093.         test_ctx.string = av_strdup("default");

  1094. 

  1095.         av_log_set_level(AV_LOG_DEBUG);

  1096. 

  1097.         for (i=0; i < FF_ARRAY_ELEMS(options); i++) {

  1098.             av_log(&test_ctx, AV_LOG_DEBUG, "Setting options string '%s'\n", options[i]);

  1099.             if (av_set_options_string(&test_ctx, options[i], "=", ":") < 0)

  1100.                 av_log(&test_ctx, AV_LOG_ERROR, "Error setting options string: '%s'\n", options[i]);

  1101.             printf("\n");

  1102.         }

  1103.         av_freep(&test_ctx.string);

  1104.     }

  1105. 

  1106.     printf("\nTesting av_opt_set_from_string()\n");

  1107.     {

  1108.         TestContext test_ctx = { 0 };

  1109.         const char *options[] = {

  1110.             "",

  1111.             "5",

  1112.             "5:hello",

  1113.             "5:hello:size=pal",

  1114.             "5:size=pal:hello",

  1115.             ":",

  1116.             "=",

  1117.             " 5 : hello : size = pal ",

  1118.             "a_very_long_option_name_that_will_need_to_be_ellipsized_around_here=42"

  1119.         };

  1120.         const char *shorthand[] = { "num", "string", NULL };

  1121. 

  1122.         test_ctx.class = &test_class;

  1123.         av_opt_set_defaults(&test_ctx);

  1124.         test_ctx.string = av_strdup("default");

  1125. 

  1126.         av_log_set_level(AV_LOG_DEBUG);

  1127. 

  1128.         for (i=0; i < FF_ARRAY_ELEMS(options); i++) {

  1129.             av_log(&test_ctx, AV_LOG_DEBUG, "Setting options string '%s'\n", options[i]);

  1130.             if (av_opt_set_from_string(&test_ctx, options[i], shorthand, "=", ":") < 0)

  1131.                 av_log(&test_ctx, AV_LOG_ERROR, "Error setting options string: '%s'\n", options[i]);

  1132.             printf("\n");

  1133.         }

  1134.         av_freep(&test_ctx.string);

  1135.     }

  1136. 

  1137.     return 0;

  1138. }

  1139. 

  1140. #endif