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.
34730 Commits
32 Branches
552MB
Tree: ae43c4c0c0
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from 'ae43c4c0c0'
${ noResults }
FFmpeg/libavutil/opt.c

925 lines
28KB
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 "common.h"

  31. #include "opt.h"

  32. #include "eval.h"

  33. #include "dict.h"

  34. #include "log.h"

  35. #include "mathematics.h"

  36. 

  37. #if FF_API_FIND_OPT

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

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

  40. {

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

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

  43. 

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

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

  46.             return o;

  47.     }

  48.     return NULL;

  49. }

  50. #endif

  51. 

  52. #if FF_API_OLD_AVOPTIONS

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

  54. {

  55.     return av_opt_next(obj, last);

  56. }

  57. #endif

  58. 

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

  60. {

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

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

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

  64.     return NULL;

  65. }

  66. 

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

  68. {

  69.     switch (o->type) {

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

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

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

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

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

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

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

  77.                                                         return 0;

  78.     }

  79.     return AVERROR(EINVAL);

  80. }

  81. 

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

  83. {

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

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

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

  87.         return AVERROR(ERANGE);

  88.     }

  89. 

  90.     switch (o->type) {

  91.     case AV_OPT_TYPE_FLAGS:

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

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

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

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

  96.     case AV_OPT_TYPE_RATIONAL:

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

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

  99.         break;

  100.     default:

  101.         return AVERROR(EINVAL);

  102.     }

  103.     return 0;

  104. }

  105. 

  106. static const double const_values[] = {

  107.     M_PI,

  108.     M_E,

  109.     FF_QP2LAMBDA,

  110.     0

  111. };

  112. 

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

  114.     "PI",

  115.     "E",

  116.     "QP2LAMBDA",

  117.     0

  118. };

  119. 

  120. static int hexchar2int(char c) {

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

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

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

  124.     return -1;

  125. }

  126. 

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

  128. {

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

  130.     uint8_t *bin, *ptr;

  131.     int len = strlen(val);

  132. 

  133.     av_freep(dst);

  134.     *lendst = 0;

  135. 

  136.     if (len & 1)

  137.         return AVERROR(EINVAL);

  138.     len /= 2;

  139. 

  140.     ptr = bin = av_malloc(len);

  141.     while (*val) {

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

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

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

  145.             av_free(bin);

  146.             return AVERROR(EINVAL);

  147.         }

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

  149.     }

  150.     *dst = bin;

  151.     *lendst = len;

  152. 

  153.     return 0;

  154. }

  155. 

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

  157. {

  158.     av_freep(dst);

  159.     *dst = av_strdup(val);

  160.     return 0;

  161. }

  162. 

  163. #define DEFAULT_NUMVAL(opt) ((opt->type == AV_OPT_TYPE_INT64) ?               \

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

  165. 

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

  167. {

  168.     int ret = 0, notfirst = 0;

  169.     for (;;) {

  170.         int i, den = 1;

  171.         char buf[256];

  172.         int cmd = 0;

  173.         double d, num = 1;

  174.         int64_t intnum = 1;

  175. 

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

  177.             cmd = *(val++);

  178. 

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

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

  181.         buf[i] = 0;

  182. 

  183.         {

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

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

  186.                 d = DEFAULT_NUMVAL(o_named);

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

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

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

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

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

  192.             else {

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

  194.                 if (res < 0) {

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

  196.                     return res;

  197.                 }

  198.             }

  199.         }

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

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

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

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

  204.         } else {

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

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

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

  208.         }

  209. 

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

  211.             return ret;

  212.         val += i;

  213.         if (!*val)

  214.             return 0;

  215.         notfirst = 1;

  216.     }

  217. 

  218.     return 0;

  219. }

  220. 

  221. #if FF_API_OLD_AVOPTIONS

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

  223. {

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

  225.     if (o_out)

  226.         *o_out = o;

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

  228. }

  229. #endif

  230. 

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

  232. {

  233.     void *dst, *target_obj;

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

  235.     if (!o || !target_obj)

  236.         return AVERROR_OPTION_NOT_FOUND;

  237.     if (!val)

  238.         return AVERROR(EINVAL);

  239. 

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

  241.     switch (o->type) {

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

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

  244.     case AV_OPT_TYPE_FLAGS:

  245.     case AV_OPT_TYPE_INT:

  246.     case AV_OPT_TYPE_INT64:

  247.     case AV_OPT_TYPE_FLOAT:

  248.     case AV_OPT_TYPE_DOUBLE:

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

  250.     }

  251. 

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

  253.     return AVERROR(EINVAL);

  254. }

  255. 

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

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

  258.     {\

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

  260.             return AVERROR(EINVAL);\

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

  262.     }

  263. 

  264. OPT_EVAL_NUMBER(flags,  AV_OPT_TYPE_FLAGS,    int)

  265. OPT_EVAL_NUMBER(int,    AV_OPT_TYPE_INT,      int)

  266. OPT_EVAL_NUMBER(int64,  AV_OPT_TYPE_INT64,    int64_t)

  267. OPT_EVAL_NUMBER(float,  AV_OPT_TYPE_FLOAT,    float)

  268. OPT_EVAL_NUMBER(double, AV_OPT_TYPE_DOUBLE,   double)

  269. OPT_EVAL_NUMBER(q,      AV_OPT_TYPE_RATIONAL, AVRational)

  270. 

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

  272.                                   int search_flags)

  273. {

  274.     void *dst, *target_obj;

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

  276. 

  277.     if (!o || !target_obj)

  278.         return AVERROR_OPTION_NOT_FOUND;

  279. 

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

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

  282. }

  283. 

  284. #if FF_API_OLD_AVOPTIONS

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

  286. {

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

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

  289.         return NULL;

  290.     return o;

  291. }

  292. 

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

  294. {

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

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

  297.         return NULL;

  298.     return o;

  299. }

  300. 

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

  302. {

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

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

  305.         return NULL;

  306.     return o;

  307. }

  308. #endif

  309. 

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

  311. {

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

  313. }

  314. 

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

  316. {

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

  318. }

  319. 

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

  321. {

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

  323. }

  324. 

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

  326. {

  327.     void *target_obj;

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

  329.     uint8_t *ptr;

  330.     uint8_t **dst;

  331.     int *lendst;

  332. 

  333.     if (!o || !target_obj)

  334.         return AVERROR_OPTION_NOT_FOUND;

  335. 

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

  337.         return AVERROR(EINVAL);

  338. 

  339.     ptr = av_malloc(len);

  340.     if (!ptr)

  341.         return AVERROR(ENOMEM);

  342. 

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

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

  345. 

  346.     av_free(*dst);

  347.     *dst = ptr;

  348.     *lendst = len;

  349.     memcpy(ptr, val, len);

  350. 

  351.     return 0;

  352. }

  353. 

  354. #if FF_API_OLD_AVOPTIONS

  355. /**

  356.  *

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

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

  359.  */

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

  361. {

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

  363.     void *dst;

  364.     uint8_t *bin;

  365.     int len, i;

  366.     if (!o)

  367.         return NULL;

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

  369.         return NULL;

  370. 

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

  372.     if (o_out) *o_out= o;

  373. 

  374.     switch (o->type) {

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

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

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

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

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

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

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

  382.     case AV_OPT_TYPE_BINARY:

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

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

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

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

  387.         break;

  388.     default: return NULL;

  389.     }

  390.     return buf;

  391. }

  392. #endif

  393. 

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

  395. {

  396.     void *dst, *target_obj;

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

  398.     uint8_t *bin, buf[128];

  399.     int len, i, ret;

  400. 

  401.     if (!o || !target_obj)

  402.         return AVERROR_OPTION_NOT_FOUND;

  403. 

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

  405. 

  406.     buf[0] = 0;

  407.     switch (o->type) {

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

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

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

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

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

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

  414.     case AV_OPT_TYPE_STRING:

  415.         if (*(uint8_t**)dst)

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

  417.         else

  418.             *out_val = av_strdup("");

  419.         return 0;

  420.     case AV_OPT_TYPE_BINARY:

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

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

  423.             return AVERROR(EINVAL);

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

  425.             return AVERROR(ENOMEM);

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

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

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

  429.         return 0;

  430.     default:

  431.         return AVERROR(EINVAL);

  432.     }

  433. 

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

  435.         return AVERROR(EINVAL);

  436.     *out_val = av_strdup(buf);

  437.     return 0;

  438. }

  439. 

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

  441.                       int search_flags)

  442. {

  443.     void *dst, *target_obj;

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

  445.     if (!o || !target_obj)

  446.         goto error;

  447. 

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

  449. 

  450.     if (o_out) *o_out= o;

  451. 

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

  453. 

  454. error:

  455.     *den=*intnum=0;

  456.     return -1;

  457. }

  458. 

  459. #if FF_API_OLD_AVOPTIONS

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

  461. {

  462.     int64_t intnum=1;

  463.     double num=1;

  464.     int den=1;

  465. 

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

  467.         return NAN;

  468.     return num*intnum/den;

  469. }

  470. 

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

  472. {

  473.     int64_t intnum=1;

  474.     double num=1;

  475.     int den=1;

  476. 

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

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

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

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

  481.     else

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

  483. }

  484. 

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

  486. {

  487.     int64_t intnum=1;

  488.     double num=1;

  489.     int den=1;

  490. 

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

  492.         return -1;

  493.     return num*intnum/den;

  494. }

  495. #endif

  496. 

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

  498. {

  499.     int64_t intnum = 1;

  500.     double     num = 1;

  501.     int   ret, den = 1;

  502. 

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

  504.         return ret;

  505.     *out_val = num*intnum/den;

  506.     return 0;

  507. }

  508. 

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

  510. {

  511.     int64_t intnum = 1;

  512.     double     num = 1;

  513.     int   ret, den = 1;

  514. 

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

  516.         return ret;

  517.     *out_val = num*intnum/den;

  518.     return 0;

  519. }

  520. 

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

  522. {

  523.     int64_t intnum = 1;

  524.     double     num = 1;

  525.     int   ret, den = 1;

  526. 

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

  528.         return ret;

  529. 

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

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

  532.     else

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

  534.     return 0;

  535. }

  536. 

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

  538. {

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

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

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

  542.     int64_t res;

  543. 

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

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

  546.         return 0;

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

  548. }

  549. 

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

  551.                      int req_flags, int rej_flags)

  552. {

  553.     const AVOption *opt=NULL;

  554. 

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

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

  557.             continue;

  558. 

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

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

  561.          * Only print items from the requested unit.

  562.          */

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

  564.             continue;

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

  566.             continue;

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

  568.             continue;

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

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

  571.         else

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

  573. 

  574.         switch (opt->type) {

  575.             case AV_OPT_TYPE_FLAGS:

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

  577.                 break;

  578.             case AV_OPT_TYPE_INT:

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

  580.                 break;

  581.             case AV_OPT_TYPE_INT64:

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

  583.                 break;

  584.             case AV_OPT_TYPE_DOUBLE:

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

  586.                 break;

  587.             case AV_OPT_TYPE_FLOAT:

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

  589.                 break;

  590.             case AV_OPT_TYPE_STRING:

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

  592.                 break;

  593.             case AV_OPT_TYPE_RATIONAL:

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

  595.                 break;

  596.             case AV_OPT_TYPE_BINARY:

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

  598.                 break;

  599.             case AV_OPT_TYPE_CONST:

  600.             default:

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

  602.                 break;

  603.         }

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

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

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

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

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

  609. 

  610.         if (opt->help)

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

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

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

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

  615.         }

  616.     }

  617. }

  618. 

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

  620. {

  621.     if (!obj)

  622.         return -1;

  623. 

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

  625. 

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

  627. 

  628.     return 0;

  629. }

  630. 

  631. void av_opt_set_defaults(void *s)

  632. {

  633. #if FF_API_OLD_AVOPTIONS

  634.     av_opt_set_defaults2(s, 0, 0);

  635. }

  636. 

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

  638. {

  639. #endif

  640.     const AVOption *opt = NULL;

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

  642. #if FF_API_OLD_AVOPTIONS

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

  644.             continue;

  645. #endif

  646.         switch (opt->type) {

  647.             case AV_OPT_TYPE_CONST:

  648.                 /* Nothing to be done here */

  649.             break;

  650.             case AV_OPT_TYPE_FLAGS:

  651.             case AV_OPT_TYPE_INT: {

  652.                 int val;

  653.                 val = opt->default_val.dbl;

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

  655.             }

  656.             break;

  657.             case AV_OPT_TYPE_INT64:

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

  659.             break;

  660.             case AV_OPT_TYPE_DOUBLE:

  661.             case AV_OPT_TYPE_FLOAT: {

  662.                 double val;

  663.                 val = opt->default_val.dbl;

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

  665.             }

  666.             break;

  667.             case AV_OPT_TYPE_RATIONAL: {

  668.                 AVRational val;

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

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

  671.             }

  672.             break;

  673.             case AV_OPT_TYPE_STRING:

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

  675.                 break;

  676.             case AV_OPT_TYPE_BINARY:

  677.                 /* Cannot set default for binary */

  678.             break;

  679.             default:

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

  681.         }

  682.     }

  683. }

  684. 

  685. /**

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

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

  688.  *

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

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

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

  692.  * separate key from value

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

  694.  * two pairs from each other

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

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

  697.  * of error:

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

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

  700.  * cannot be set

  701.  */

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

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

  704. {

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

  706.     char *val;

  707.     int ret;

  708. 

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

  710.         (*buf)++;

  711.         val = av_get_token(buf, pairs_sep);

  712.     } else {

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

  714.         av_free(key);

  715.         return AVERROR(EINVAL);

  716.     }

  717. 

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

  719. 

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

  721.     if (ret == AVERROR_OPTION_NOT_FOUND)

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

  723. 

  724.     av_free(key);

  725.     av_free(val);

  726.     return ret;

  727. }

  728. 

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

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

  731. {

  732.     int ret, count = 0;

  733. 

  734.     if (!opts)

  735.         return 0;

  736. 

  737.     while (*opts) {

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

  739.             return ret;

  740.         count++;

  741. 

  742.         if (*opts)

  743.             opts++;

  744.     }

  745. 

  746.     return count;

  747. }

  748. 

  749. void av_opt_free(void *obj)

  750. {

  751.     const AVOption *o = NULL;

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

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

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

  755. }

  756. 

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

  758. {

  759.     AVDictionaryEntry *t = NULL;

  760.     AVDictionary    *tmp = NULL;

  761.     int ret = 0;

  762. 

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

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

  765.         if (ret == AVERROR_OPTION_NOT_FOUND)

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

  767.         else if (ret < 0) {

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

  769.             break;

  770.         }

  771.         ret = 0;

  772.     }

  773.     av_dict_free(options);

  774.     *options = tmp;

  775.     return ret;

  776. }

  777. 

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

  779.                             int opt_flags, int search_flags)

  780. {

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

  782. }

  783. 

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

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

  786. {

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

  788.     const AVOption *o = NULL;

  789. 

  790.     if (search_flags & AV_OPT_SEARCH_CHILDREN) {

  791.         if (search_flags & AV_OPT_SEARCH_FAKE_OBJ) {

  792.             const AVClass *child = NULL;

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

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

  795.                     return o;

  796.         } else {

  797.             void *child = NULL;

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

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

  800.                     return o;

  801.         }

  802.     }

  803. 

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

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

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

  807.              (unit  && o->unit && !strcmp(o->unit, unit)))) {

  808.             if (target_obj) {

  809.                 if (!(search_flags & AV_OPT_SEARCH_FAKE_OBJ))

  810.                     *target_obj = obj;

  811.                 else

  812.                     *target_obj = NULL;

  813.             }

  814.             return o;

  815.         }

  816.     }

  817.     return NULL;

  818. }

  819. 

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

  821. {

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

  823.     if (c->child_next)

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

  825.     return NULL;

  826. }

  827. 

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

  829. {

  830.     if (parent->child_class_next)

  831.         return parent->child_class_next(prev);

  832.     return NULL;

  833. }

  834. 

  835. #ifdef TEST

  836. 

  837. #undef printf

  838. 

  839. typedef struct TestContext

  840. {

  841.     const AVClass *class;

  842.     int num;

  843.     int toggle;

  844.     char *string;

  845.     int flags;

  846.     AVRational rational;

  847. } TestContext;

  848. 

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

  850. 

  851. #define TEST_FLAG_COOL 01

  852. #define TEST_FLAG_LAME 02

  853. #define TEST_FLAG_MU   04

  854. 

  855. static const AVOption test_options[]= {

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

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

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

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

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

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

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

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

  864. {NULL},

  865. };

  866. 

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

  868. {

  869.     return "test";

  870. }

  871. 

  872. static const AVClass test_class = {

  873.     "TestContext",

  874.     test_get_name,

  875.     test_options

  876. };

  877. 

  878. int main(void)

  879. {

  880.     int i;

  881. 

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

  883.     {

  884.         TestContext test_ctx;

  885.         const char *options[] = {

  886.             "",

  887.             ":",

  888.             "=",

  889.             "foo=:",

  890.             ":=foo",

  891.             "=foo",

  892.             "foo=",

  893.             "foo",

  894.             "foo=val",

  895.             "foo==val",

  896.             "toggle=:",

  897.             "string=:",

  898.             "toggle=1 : foo",

  899.             "toggle=100",

  900.             "toggle==1",

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

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

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

  904.             "rational=-1/0",

  905.         };

  906. 

  907.         test_ctx.class = &test_class;

  908.         av_opt_set_defaults(&test_ctx);

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

  910. 

  911.         av_log_set_level(AV_LOG_DEBUG);

  912. 

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

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

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

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

  917.             printf("\n");

  918.         }

  919.     }

  920. 

  921.     return 0;

  922. }

  923. 

  924. #endif