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.
41070 Commits
32 Branches
293MB
Tree: fcd08262fd
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from 'fcd08262fd'
${ noResults }
FFmpeg/libavutil/opt.c

950 lines
30KB
Raw Blame History 

  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. #include "dict.h"

  33. #include "log.h"

  34. #include "parseutils.h"

  35. 

  36. #if FF_API_FIND_OPT

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

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

  39. {

  40.     const AVOption *o = NULL;

  41. 

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

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

  44.             return o;

  45.     }

  46.     return NULL;

  47. }

  48. #endif

  49. 

  50. #if FF_API_OLD_AVOPTIONS

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

  52. {

  53.     return av_opt_next(obj, last);

  54. }

  55. #endif

  56. 

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

  58. {

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

  60.     if (!last && class->option[0].name) return class->option;

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

  62.     return NULL;

  63. }

  64. 

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

  66. {

  67.     switch (o->type) {

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

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

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

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

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

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

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

  75.                                                         return 0;

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

  77.     }

  78.     return AVERROR(EINVAL);

  79. }

  80. 

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

  82. {

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

  84.         av_log(obj, AV_LOG_ERROR, "Value %f for parameter '%s' out of range\n", num*intnum/den, o->name);

  85.         return AVERROR(ERANGE);

  86.     }

  87. 

  88.     switch (o->type) {

  89.     case AV_OPT_TYPE_FLAGS:

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

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

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

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

  94.     case AV_OPT_TYPE_RATIONAL:

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

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

  97.         break;

  98.     default:

  99.         return AVERROR(EINVAL);

  100.     }

  101.     return 0;

  102. }

  103. 

  104. static const double const_values[] = {

  105.     M_PI,

  106.     M_E,

  107.     FF_QP2LAMBDA,

  108.     0

  109. };

  110. 

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

  112.     "PI",

  113.     "E",

  114.     "QP2LAMBDA",

  115.     0

  116. };

  117. 

  118. static int hexchar2int(char c) {

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

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

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

  122.     return -1;

  123. }

  124. 

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

  126. {

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

  128.     uint8_t *bin, *ptr;

  129.     int len = strlen(val);

  130. 

  131.     av_freep(dst);

  132.     *lendst = 0;

  133. 

  134.     if (len & 1)

  135.         return AVERROR(EINVAL);

  136.     len /= 2;

  137. 

  138.     ptr = bin = av_malloc(len);

  139.     while (*val) {

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

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

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

  143.             av_free(bin);

  144.             return AVERROR(EINVAL);

  145.         }

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

  147.     }

  148.     *dst = bin;

  149.     *lendst = len;

  150. 

  151.     return 0;

  152. }

  153. 

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

  155. {

  156.     av_freep(dst);

  157.     *dst = av_strdup(val);

  158.     return 0;

  159. }

  160. 

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

  162. {

  163.     int ret = 0, notfirst = 0;

  164.     for (;;) {

  165.         int i, den = 1;

  166.         char buf[256];

  167.         int cmd = 0;

  168.         double d, num = 1;

  169.         int64_t intnum = 1;

  170. 

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

  172.             cmd = *(val++);

  173. 

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

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

  176.         buf[i] = 0;

  177. 

  178.         {

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

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

  181.                 d = o_named->default_val.dbl;

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

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

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

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

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

  187.             else {

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

  189.                 if (res < 0) {

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

  191.                     return res;

  192.                 }

  193.             }

  194.         }

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

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

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

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

  199.         } else {

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

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

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

  203.         }

  204. 

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

  206.             return ret;

  207.         val += i;

  208.         if (!*val)

  209.             return 0;

  210.         notfirst = 1;

  211.     }

  212. 

  213.     return 0;

  214. }

  215. 

  216. #if FF_API_OLD_AVOPTIONS

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

  218. {

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

  220.     if (o_out)

  221.         *o_out = o;

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

  223. }

  224. #endif

  225. 

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

  227. {

  228.     int ret;

  229.     void *dst, *target_obj;

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

  231.     if (!o || !target_obj)

  232.         return AVERROR_OPTION_NOT_FOUND;

  233.     if (!val && o->type != AV_OPT_TYPE_STRING)

  234.         return AVERROR(EINVAL);

  235. 

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

  237.     switch (o->type) {

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

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

  240.     case AV_OPT_TYPE_FLAGS:

  241.     case AV_OPT_TYPE_INT:

  242.     case AV_OPT_TYPE_INT64:

  243.     case AV_OPT_TYPE_FLOAT:

  244.     case AV_OPT_TYPE_DOUBLE:

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

  246.     case AV_OPT_TYPE_IMAGE_SIZE:

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

  248.         if (ret < 0)

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

  250.         return ret;

  251.     }

  252. 

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

  254.     return AVERROR(EINVAL);

  255. }

  256. 

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

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

  259.     {\

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

  261.             return AVERROR(EINVAL);\

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

  263.     }

  264. 

  265. OPT_EVAL_NUMBER(flags,  AV_OPT_TYPE_FLAGS,    int)

  266. OPT_EVAL_NUMBER(int,    AV_OPT_TYPE_INT,      int)

  267. OPT_EVAL_NUMBER(int64,  AV_OPT_TYPE_INT64,    int64_t)

  268. OPT_EVAL_NUMBER(float,  AV_OPT_TYPE_FLOAT,    float)

  269. OPT_EVAL_NUMBER(double, AV_OPT_TYPE_DOUBLE,   double)

  270. OPT_EVAL_NUMBER(q,      AV_OPT_TYPE_RATIONAL, AVRational)

  271. 

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

  273.                                   int search_flags)

  274. {

  275.     void *dst, *target_obj;

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

  277. 

  278.     if (!o || !target_obj)

  279.         return AVERROR_OPTION_NOT_FOUND;

  280. 

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

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

  283. }

  284. 

  285. #if FF_API_OLD_AVOPTIONS

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

  287. {

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

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

  290.         return NULL;

  291.     return o;

  292. }

  293. 

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

  295. {

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

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

  298.         return NULL;

  299.     return o;

  300. }

  301. 

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

  303. {

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

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

  306.         return NULL;

  307.     return o;

  308. }

  309. #endif

  310. 

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

  312. {

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

  314. }

  315. 

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

  317. {

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

  319. }

  320. 

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

  322. {

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

  324. }

  325. 

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

  327. {

  328.     void *target_obj;

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

  330.     uint8_t *ptr;

  331.     uint8_t **dst;

  332.     int *lendst;

  333. 

  334.     if (!o || !target_obj)

  335.         return AVERROR_OPTION_NOT_FOUND;

  336. 

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

  338.         return AVERROR(EINVAL);

  339. 

  340.     ptr = av_malloc(len);

  341.     if (!ptr)

  342.         return AVERROR(ENOMEM);

  343. 

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

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

  346. 

  347.     av_free(*dst);

  348.     *dst = ptr;

  349.     *lendst = len;

  350.     memcpy(ptr, val, len);

  351. 

  352.     return 0;

  353. }

  354. 

  355. #if FF_API_OLD_AVOPTIONS

  356. /**

  357.  *

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

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

  360.  */

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

  362. {

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

  364.     void *dst;

  365.     uint8_t *bin;

  366.     int len, i;

  367.     if (!o)

  368.         return NULL;

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

  370.         return NULL;

  371. 

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

  373.     if (o_out) *o_out= o;

  374. 

  375.     switch (o->type) {

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

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

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

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

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

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

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

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

  384.     case AV_OPT_TYPE_BINARY:

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

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

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

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

  389.         break;

  390.     default: return NULL;

  391.     }

  392.     return buf;

  393. }

  394. #endif

  395. 

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

  397. {

  398.     void *dst, *target_obj;

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

  400.     uint8_t *bin, buf[128];

  401.     int len, i, ret;

  402. 

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

  404.         return AVERROR_OPTION_NOT_FOUND;

  405. 

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

  407. 

  408.     buf[0] = 0;

  409.     switch (o->type) {

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

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

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

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

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

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

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

  417.     case AV_OPT_TYPE_STRING:

  418.         if (*(uint8_t**)dst)

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

  420.         else

  421.             *out_val = av_strdup("");

  422.         return 0;

  423.     case AV_OPT_TYPE_BINARY:

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

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

  426.             return AVERROR(EINVAL);

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

  428.             return AVERROR(ENOMEM);

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

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

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

  432.         return 0;

  433.     case AV_OPT_TYPE_IMAGE_SIZE:

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

  435.         break;

  436.     default:

  437.         return AVERROR(EINVAL);

  438.     }

  439. 

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

  441.         return AVERROR(EINVAL);

  442.     *out_val = av_strdup(buf);

  443.     return 0;

  444. }

  445. 

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

  447.                       int search_flags)

  448. {

  449.     void *dst, *target_obj;

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

  451.     if (!o || !target_obj)

  452.         goto error;

  453. 

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

  455. 

  456.     if (o_out) *o_out= o;

  457. 

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

  459. 

  460. error:

  461.     *den=*intnum=0;

  462.     return -1;

  463. }

  464. 

  465. #if FF_API_OLD_AVOPTIONS

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

  467. {

  468.     int64_t intnum=1;

  469.     double num=1;

  470.     int den=1;

  471. 

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

  473.         return NAN;

  474.     return num*intnum/den;

  475. }

  476. 

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

  478. {

  479.     int64_t intnum=1;

  480.     double num=1;

  481.     int den=1;

  482. 

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

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

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

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

  487.     else

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

  489. }

  490. 

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

  492. {

  493.     int64_t intnum=1;

  494.     double num=1;

  495.     int den=1;

  496. 

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

  498.         return -1;

  499.     return num*intnum/den;

  500. }

  501. #endif

  502. 

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

  504. {

  505.     int64_t intnum = 1;

  506.     double     num = 1;

  507.     int   ret, den = 1;

  508. 

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

  510.         return ret;

  511.     *out_val = num*intnum/den;

  512.     return 0;

  513. }

  514. 

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

  516. {

  517.     int64_t intnum = 1;

  518.     double     num = 1;

  519.     int   ret, den = 1;

  520. 

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

  522.         return ret;

  523.     *out_val = num*intnum/den;

  524.     return 0;

  525. }

  526. 

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

  528. {

  529.     int64_t intnum = 1;

  530.     double     num = 1;

  531.     int   ret, den = 1;

  532. 

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

  534.         return ret;

  535. 

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

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

  538.     else

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

  540.     return 0;

  541. }

  542. 

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

  544. {

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

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

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

  548.     int64_t res;

  549. 

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

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

  552.         return 0;

  553.     return res & (int) flag->default_val.dbl;

  554. }

  555. 

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

  557.                      int req_flags, int rej_flags)

  558. {

  559.     const AVOption *opt=NULL;

  560. 

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

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

  563.             continue;

  564. 

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

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

  567.          * Only print items from the requested unit.

  568.          */

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

  570.             continue;

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

  572.             continue;

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

  574.             continue;

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

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

  577.         else

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

  579. 

  580.         switch (opt->type) {

  581.             case AV_OPT_TYPE_FLAGS:

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

  583.                 break;

  584.             case AV_OPT_TYPE_INT:

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

  586.                 break;

  587.             case AV_OPT_TYPE_INT64:

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

  589.                 break;

  590.             case AV_OPT_TYPE_DOUBLE:

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

  592.                 break;

  593.             case AV_OPT_TYPE_FLOAT:

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

  595.                 break;

  596.             case AV_OPT_TYPE_STRING:

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

  598.                 break;

  599.             case AV_OPT_TYPE_RATIONAL:

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

  601.                 break;

  602.             case AV_OPT_TYPE_BINARY:

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

  604.                 break;

  605.             case AV_OPT_TYPE_IMAGE_SIZE:

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

  607.                 break;

  608.             case AV_OPT_TYPE_CONST:

  609.             default:

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

  611.                 break;

  612.         }

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

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

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

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

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

  618. 

  619.         if (opt->help)

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

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

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

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

  624.         }

  625.     }

  626. }

  627. 

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

  629. {

  630.     if (!obj)

  631.         return -1;

  632. 

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

  634. 

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

  636. 

  637.     return 0;

  638. }

  639. 

  640. void av_opt_set_defaults(void *s)

  641. {

  642. #if FF_API_OLD_AVOPTIONS

  643.     av_opt_set_defaults2(s, 0, 0);

  644. }

  645. 

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

  647. {

  648. #endif

  649.     const AVOption *opt = NULL;

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

  651. #if FF_API_OLD_AVOPTIONS

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

  653.             continue;

  654. #endif

  655.         switch (opt->type) {

  656.             case AV_OPT_TYPE_CONST:

  657.                 /* Nothing to be done here */

  658.             break;

  659.             case AV_OPT_TYPE_FLAGS:

  660.             case AV_OPT_TYPE_INT: {

  661.                 int val;

  662.                 val = opt->default_val.dbl;

  663.                 av_opt_set_int(s, opt->name, val, 0);

  664.             }

  665.             break;

  666.             case AV_OPT_TYPE_INT64:

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

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

  669.                 av_opt_set_int(s, opt->name, opt->default_val.dbl, 0);

  670.             break;

  671.             case AV_OPT_TYPE_DOUBLE:

  672.             case AV_OPT_TYPE_FLOAT: {

  673.                 double val;

  674.                 val = opt->default_val.dbl;

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

  676.             }

  677.             break;

  678.             case AV_OPT_TYPE_RATIONAL: {

  679.                 AVRational val;

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

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

  682.             }

  683.             break;

  684.             case AV_OPT_TYPE_STRING:

  685.             case AV_OPT_TYPE_IMAGE_SIZE:

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

  687.                 break;

  688.             case AV_OPT_TYPE_BINARY:

  689.                 /* Cannot set default for binary */

  690.             break;

  691.             default:

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

  693.         }

  694.     }

  695. }

  696. 

  697. /**

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

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

  700.  *

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

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

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

  704.  * separate key from value

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

  706.  * two pairs from each other

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

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

  709.  * of error:

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

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

  712.  * cannot be set

  713.  */

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

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

  716. {

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

  718.     char *val;

  719.     int ret;

  720. 

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

  722.         (*buf)++;

  723.         val = av_get_token(buf, pairs_sep);

  724.     } else {

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

  726.         av_free(key);

  727.         return AVERROR(EINVAL);

  728.     }

  729. 

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

  731. 

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

  733.     if (ret == AVERROR_OPTION_NOT_FOUND)

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

  735. 

  736.     av_free(key);

  737.     av_free(val);

  738.     return ret;

  739. }

  740. 

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

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

  743. {

  744.     int ret, count = 0;

  745. 

  746.     if (!opts)

  747.         return 0;

  748. 

  749.     while (*opts) {

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

  751.             return ret;

  752.         count++;

  753. 

  754.         if (*opts)

  755.             opts++;

  756.     }

  757. 

  758.     return count;

  759. }

  760. 

  761. void av_opt_free(void *obj)

  762. {

  763.     const AVOption *o = NULL;

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

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

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

  767. }

  768. 

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

  770. {

  771.     AVDictionaryEntry *t = NULL;

  772.     AVDictionary    *tmp = NULL;

  773.     int ret = 0;

  774. 

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

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

  777.         if (ret == AVERROR_OPTION_NOT_FOUND)

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

  779.         else if (ret < 0) {

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

  781.             break;

  782.         }

  783.         ret = 0;

  784.     }

  785.     av_dict_free(options);

  786.     *options = tmp;

  787.     return ret;

  788. }

  789. 

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

  791.                             int opt_flags, int search_flags)

  792. {

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

  794. }

  795. 

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

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

  798. {

  799.     const AVClass  *c;

  800.     const AVOption *o = NULL;

  801. 

  802.     if(!obj)

  803.         return NULL;

  804. 

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

  806. 

  807.     if (search_flags & AV_OPT_SEARCH_CHILDREN) {

  808.         if (search_flags & AV_OPT_SEARCH_FAKE_OBJ) {

  809.             const AVClass *child = NULL;

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

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

  812.                     return o;

  813.         } else {

  814.             void *child = NULL;

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

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

  817.                     return o;

  818.         }

  819.     }

  820. 

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

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

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

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

  825.             if (target_obj) {

  826.                 if (!(search_flags & AV_OPT_SEARCH_FAKE_OBJ))

  827.                     *target_obj = obj;

  828.                 else

  829.                     *target_obj = NULL;

  830.             }

  831.             return o;

  832.         }

  833.     }

  834.     return NULL;

  835. }

  836. 

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

  838. {

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

  840.     if (c->child_next)

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

  842.     return NULL;

  843. }

  844. 

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

  846. {

  847.     if (parent->child_class_next)

  848.         return parent->child_class_next(prev);

  849.     return NULL;

  850. }

  851. 

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

  853. {

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

  855.     if(!opt)

  856.         return NULL;

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

  858. }

  859. 

  860. #ifdef TEST

  861. 

  862. #undef printf

  863. 

  864. typedef struct TestContext

  865. {

  866.     const AVClass *class;

  867.     int num;

  868.     int toggle;

  869.     char *string;

  870.     int flags;

  871.     AVRational rational;

  872. } TestContext;

  873. 

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

  875. 

  876. #define TEST_FLAG_COOL 01

  877. #define TEST_FLAG_LAME 02

  878. #define TEST_FLAG_MU   04

  879. 

  880. static const AVOption test_options[]= {

  881. {"num",      "set num",        OFFSET(num),      AV_OPT_TYPE_INT,      {0},              0,        100                 },

  882. {"toggle",   "set toggle",     OFFSET(toggle),   AV_OPT_TYPE_INT,      {0},              0,        1                   },

  883. {"rational", "set rational",   OFFSET(rational), AV_OPT_TYPE_RATIONAL, {0},              0,        10                  },

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

  885. {"flags",    "set flags",      OFFSET(flags),    AV_OPT_TYPE_FLAGS,    {0},              0,        INT_MAX, 0, "flags" },

  886. {"cool",     "set cool flag ", 0,                AV_OPT_TYPE_CONST,    {TEST_FLAG_COOL}, INT_MIN,  INT_MAX, 0, "flags" },

  887. {"lame",     "set lame flag ", 0,                AV_OPT_TYPE_CONST,    {TEST_FLAG_LAME}, INT_MIN,  INT_MAX, 0, "flags" },

  888. {"mu",       "set mu flag ",   0,                AV_OPT_TYPE_CONST,    {TEST_FLAG_MU},   INT_MIN,  INT_MAX, 0, "flags" },

  889. {NULL},

  890. };

  891. 

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

  893. {

  894.     return "test";

  895. }

  896. 

  897. static const AVClass test_class = {

  898.     "TestContext",

  899.     test_get_name,

  900.     test_options

  901. };

  902. 

  903. int main(void)

  904. {

  905.     int i;

  906. 

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

  908.     {

  909.         TestContext test_ctx;

  910.         const char *options[] = {

  911.             "",

  912.             ":",

  913.             "=",

  914.             "foo=:",

  915.             ":=foo",

  916.             "=foo",

  917.             "foo=",

  918.             "foo",

  919.             "foo=val",

  920.             "foo==val",

  921.             "toggle=:",

  922.             "string=:",

  923.             "toggle=1 : foo",

  924.             "toggle=100",

  925.             "toggle==1",

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

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

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

  929.             "rational=-1/0",

  930.         };

  931. 

  932.         test_ctx.class = &test_class;

  933.         av_opt_set_defaults(&test_ctx);

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

  935. 

  936.         av_log_set_level(AV_LOG_DEBUG);

  937. 

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

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

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

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

  942.             printf("\n");

  943.         }

  944.     }

  945. 

  946.     return 0;

  947. }

  948. 

  949. #endif