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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 "channel_layout.h"

  31. #include "common.h"

  32. #include "opt.h"

  33. #include "eval.h"

  34. #include "dict.h"

  35. #include "log.h"

  36. #include "parseutils.h"

  37. #include "pixdesc.h"

  38. #include "mathematics.h"

  39. #include "samplefmt.h"

  40. 

  41. #include <float.h>

  42. 

  43. #if FF_API_FIND_OPT

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

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

  46. {

  47.     const AVOption *o = NULL;

  48. 

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

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

  51.             return o;

  52.     }

  53.     return NULL;

  54. }

  55. #endif

  56. 

  57. #if FF_API_OLD_AVOPTIONS

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

  59. {

  60.     return av_opt_next(obj, last);

  61. }

  62. #endif

  63. 

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

  65. {

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

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

  68.         return class->option;

  69.     if (last && last[1].name)

  70.         return ++last;

  71.     return NULL;

  72. }

  73. 

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

  75. {

  76.     switch (o->type) {

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

  78.     case AV_OPT_TYPE_PIXEL_FMT:

  79.     case AV_OPT_TYPE_SAMPLE_FMT:

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

  81.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  82.     case AV_OPT_TYPE_DURATION:

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

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

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

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

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

  88.                                                         return 0;

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

  90.     }

  91.     return AVERROR(EINVAL);

  92. }

  93. 

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

  95. {

  96.     if (o->type != AV_OPT_TYPE_FLAGS &&

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

  98.         av_log(obj, AV_LOG_ERROR, "Value %f for parameter '%s' out of range [%g - %g]\n",

  99.                num*intnum/den, o->name, o->min, o->max);

  100.         return AVERROR(ERANGE);

  101.     }

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

  103.         double d = num*intnum/den;

  104.         if (d < -1.5 || d > 0xFFFFFFFF+0.5 || (llrint(d*256) & 255)) {

  105.             av_log(obj, AV_LOG_ERROR,

  106.                    "Value %f for parameter '%s' is not a valid set of 32bit integer flags\n",

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

  108.             return AVERROR(ERANGE);

  109.         }

  110.     }

  111. 

  112.     switch (o->type) {

  113.     case AV_OPT_TYPE_FLAGS:

  114.     case AV_OPT_TYPE_PIXEL_FMT:

  115.     case AV_OPT_TYPE_SAMPLE_FMT:

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

  117.     case AV_OPT_TYPE_DURATION:

  118.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

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

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

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

  122.     case AV_OPT_TYPE_RATIONAL:

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

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

  125.         break;

  126.     default:

  127.         return AVERROR(EINVAL);

  128.     }

  129.     return 0;

  130. }

  131. 

  132. static const double const_values[] = {

  133.     M_PI,

  134.     M_E,

  135.     FF_QP2LAMBDA,

  136.     0

  137. };

  138. 

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

  140.     "PI",

  141.     "E",

  142.     "QP2LAMBDA",

  143.     0

  144. };

  145. 

  146. static int hexchar2int(char c) {

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

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

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

  150.     return -1;

  151. }

  152. 

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

  154. {

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

  156.     uint8_t *bin, *ptr;

  157.     int len = strlen(val);

  158. 

  159.     av_freep(dst);

  160.     *lendst = 0;

  161. 

  162.     if (len & 1)

  163.         return AVERROR(EINVAL);

  164.     len /= 2;

  165. 

  166.     ptr = bin = av_malloc(len);

  167.     while (*val) {

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

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

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

  171.             av_free(bin);

  172.             return AVERROR(EINVAL);

  173.         }

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

  175.     }

  176.     *dst = bin;

  177.     *lendst = len;

  178. 

  179.     return 0;

  180. }

  181. 

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

  183. {

  184.     av_freep(dst);

  185.     *dst = av_strdup(val);

  186.     return 0;

  187. }

  188. 

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

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

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

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

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

  194. 

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

  196. {

  197.     int ret = 0, notfirst = 0;

  198.     int num, den;

  199.     char c;

  200. 

  201.     if (sscanf(val, "%d%*1[:/]%d%c", &num, &den, &c) == 2) {

  202.         if ((ret = write_number(obj, o, dst, 1, den, num)) >= 0)

  203.             return ret;

  204.         ret = 0;

  205.     }

  206. 

  207.     for (;;) {

  208.         int i, den = 1;

  209.         char buf[256];

  210.         int cmd = 0;

  211.         double d, num = 1;

  212.         int64_t intnum = 1;

  213. 

  214.         i = 0;

  215.         if (*val == '+' || *val == '-') {

  216.             if (o->type == AV_OPT_TYPE_FLAGS)

  217.                 cmd = *(val++);

  218.             else if (!notfirst)

  219.                 buf[i++] = *val;

  220.         }

  221. 

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

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

  224.         buf[i] = 0;

  225. 

  226.         {

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

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

  229.                 d = DEFAULT_NUMVAL(o_named);

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

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

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

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

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

  235.             else {

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

  237.                 if (res < 0) {

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

  239.                     return res;

  240.                 }

  241.             }

  242.         }

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

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

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

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

  247.         } else {

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

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

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

  251.         }

  252. 

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

  254.             return ret;

  255.         val += i;

  256.         if (!*val)

  257.             return 0;

  258.         notfirst = 1;

  259.     }

  260. 

  261.     return 0;

  262. }

  263. 

  264. static int set_string_image_size(void *obj, const AVOption *o, const char *val, int *dst)

  265. {

  266.     int ret;

  267. 

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

  269.         dst[0] =

  270.         dst[1] = 0;

  271.         return 0;

  272.     }

  273.     ret = av_parse_video_size(dst, dst + 1, val);

  274.     if (ret < 0)

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

  276.     return ret;

  277. }

  278. 

  279. static int set_string_video_rate(void *obj, const AVOption *o, const char *val, AVRational *dst)

  280. {

  281.     int ret;

  282.     if (!val) {

  283.         ret = AVERROR(EINVAL);

  284.     } else {

  285.         ret = av_parse_video_rate(dst, val);

  286.     }

  287.     if (ret < 0)

  288.         av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as video rate\n", val);

  289.     return ret;

  290. }

  291. 

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

  293. {

  294.     int ret;

  295. 

  296.     if (!val) {

  297.         return 0;

  298.     } else {

  299.         ret = av_parse_color(dst, val, -1, obj);

  300.         if (ret < 0)

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

  302.         return ret;

  303.     }

  304.     return 0;

  305. }

  306. 

  307. static int set_string_fmt(void *obj, const AVOption *o, const char *val, uint8_t *dst,

  308.                           int fmt_nb, int ((*get_fmt)(const char *)), const char *desc)

  309. {

  310.     int fmt, min, max;

  311. 

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

  313.         fmt = -1;

  314.     } else {

  315.         fmt = get_fmt(val);

  316.         if (fmt == -1) {

  317.             char *tail;

  318.             fmt = strtol(val, &tail, 0);

  319.             if (*tail || (unsigned)fmt >= fmt_nb) {

  320.                 av_log(obj, AV_LOG_ERROR,

  321.                        "Unable to parse option value \"%s\" as %s\n", val, desc);

  322.                 return AVERROR(EINVAL);

  323.             }

  324.         }

  325.     }

  326. 

  327.     min = FFMAX(o->min, -1);

  328.     max = FFMIN(o->max, fmt_nb-1);

  329. 

  330.     // hack for compatibility with old ffmpeg

  331.     if(min == 0 && max == 0) {

  332.         min = -1;

  333.         max = fmt_nb-1;

  334.     }

  335. 

  336.     if (fmt < min || fmt > max) {

  337.         av_log(obj, AV_LOG_ERROR,

  338.                "Value %d for parameter '%s' out of %s format range [%d - %d]\n",

  339.                fmt, o->name, desc, min, max);

  340.         return AVERROR(ERANGE);

  341.     }

  342. 

  343.     *(int *)dst = fmt;

  344.     return 0;

  345. }

  346. 

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

  348. {

  349.     return set_string_fmt(obj, o, val, dst,

  350.                           AV_PIX_FMT_NB, av_get_pix_fmt, "pixel format");

  351. }

  352. 

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

  354. {

  355.     return set_string_fmt(obj, o, val, dst,

  356.                           AV_SAMPLE_FMT_NB, av_get_sample_fmt, "sample format");

  357. }

  358. 

  359. #if FF_API_OLD_AVOPTIONS

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

  361. {

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

  363.     if (o_out)

  364.         *o_out = o;

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

  366. }

  367. #endif

  368. 

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

  370. {

  371.     int ret = 0;

  372.     void *dst, *target_obj;

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

  374.     if (!o || !target_obj)

  375.         return AVERROR_OPTION_NOT_FOUND;

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

  377.                  o->type != AV_OPT_TYPE_PIXEL_FMT && o->type != AV_OPT_TYPE_SAMPLE_FMT &&

  378.                  o->type != AV_OPT_TYPE_IMAGE_SIZE && o->type != AV_OPT_TYPE_VIDEO_RATE &&

  379.                  o->type != AV_OPT_TYPE_DURATION && o->type != AV_OPT_TYPE_COLOR &&

  380.                  o->type != AV_OPT_TYPE_CHANNEL_LAYOUT))

  381.         return AVERROR(EINVAL);

  382. 

  383.     if (o->flags & AV_OPT_FLAG_READONLY)

  384.         return AVERROR(EINVAL);

  385. 

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

  387.     switch (o->type) {

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

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

  390.     case AV_OPT_TYPE_FLAGS:

  391.     case AV_OPT_TYPE_INT:

  392.     case AV_OPT_TYPE_INT64:

  393.     case AV_OPT_TYPE_FLOAT:

  394.     case AV_OPT_TYPE_DOUBLE:

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

  396.     case AV_OPT_TYPE_IMAGE_SIZE: return set_string_image_size(obj, o, val, dst);

  397.     case AV_OPT_TYPE_VIDEO_RATE: return set_string_video_rate(obj, o, val, dst);

  398.     case AV_OPT_TYPE_PIXEL_FMT:  return set_string_pixel_fmt(obj, o, val, dst);

  399.     case AV_OPT_TYPE_SAMPLE_FMT: return set_string_sample_fmt(obj, o, val, dst);

  400.     case AV_OPT_TYPE_DURATION:

  401.         if (!val) {

  402.             *(int64_t *)dst = 0;

  403.             return 0;

  404.         } else {

  405.             if ((ret = av_parse_time(dst, val, 1)) < 0)

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

  407.             return ret;

  408.         }

  409.         break;

  410.     case AV_OPT_TYPE_COLOR:      return set_string_color(obj, o, val, dst);

  411.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

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

  413.             *(int64_t *)dst = 0;

  414.         } else {

  415. #if FF_API_GET_CHANNEL_LAYOUT_COMPAT

  416.             int64_t cl = ff_get_channel_layout(val, 0);

  417. #else

  418.             int64_t cl = av_get_channel_layout(val);

  419. #endif

  420.             if (!cl) {

  421.                 av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as channel layout\n", val);

  422.                 ret = AVERROR(EINVAL);

  423.             }

  424.             *(int64_t *)dst = cl;

  425.             return ret;

  426.         }

  427.         break;

  428.     }

  429. 

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

  431.     return AVERROR(EINVAL);

  432. }

  433. 

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

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

  436.     {\

  437.         if (!o || o->type != opttype || o->flags & AV_OPT_FLAG_READONLY)\

  438.             return AVERROR(EINVAL);\

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

  440.     }

  441. 

  442. OPT_EVAL_NUMBER(flags,  AV_OPT_TYPE_FLAGS,    int)

  443. OPT_EVAL_NUMBER(int,    AV_OPT_TYPE_INT,      int)

  444. OPT_EVAL_NUMBER(int64,  AV_OPT_TYPE_INT64,    int64_t)

  445. OPT_EVAL_NUMBER(float,  AV_OPT_TYPE_FLOAT,    float)

  446. OPT_EVAL_NUMBER(double, AV_OPT_TYPE_DOUBLE,   double)

  447. OPT_EVAL_NUMBER(q,      AV_OPT_TYPE_RATIONAL, AVRational)

  448. 

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

  450.                                   int search_flags)

  451. {

  452.     void *dst, *target_obj;

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

  454. 

  455.     if (!o || !target_obj)

  456.         return AVERROR_OPTION_NOT_FOUND;

  457. 

  458.     if (o->flags & AV_OPT_FLAG_READONLY)

  459.         return AVERROR(EINVAL);

  460. 

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

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

  463. }

  464. 

  465. #if FF_API_OLD_AVOPTIONS

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

  467. {

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

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

  470.         return NULL;

  471.     return o;

  472. }

  473. 

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

  475. {

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

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

  478.         return NULL;

  479.     return o;

  480. }

  481. 

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

  483. {

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

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

  486.         return NULL;

  487.     return o;

  488. }

  489. #endif

  490. 

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

  492. {

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

  494. }

  495. 

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

  497. {

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

  499. }

  500. 

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

  502. {

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

  504. }

  505. 

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

  507. {

  508.     void *target_obj;

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

  510.     uint8_t *ptr;

  511.     uint8_t **dst;

  512.     int *lendst;

  513. 

  514.     if (!o || !target_obj)

  515.         return AVERROR_OPTION_NOT_FOUND;

  516. 

  517.     if (o->type != AV_OPT_TYPE_BINARY || o->flags & AV_OPT_FLAG_READONLY)

  518.         return AVERROR(EINVAL);

  519. 

  520.     ptr = len ? av_malloc(len) : NULL;

  521.     if (len && !ptr)

  522.         return AVERROR(ENOMEM);

  523. 

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

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

  526. 

  527.     av_free(*dst);

  528.     *dst = ptr;

  529.     *lendst = len;

  530.     if (len)

  531.         memcpy(ptr, val, len);

  532. 

  533.     return 0;

  534. }

  535. 

  536. int av_opt_set_image_size(void *obj, const char *name, int w, int h, int search_flags)

  537. {

  538.     void *target_obj;

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

  540. 

  541.     if (!o || !target_obj)

  542.         return AVERROR_OPTION_NOT_FOUND;

  543.     if (o->type != AV_OPT_TYPE_IMAGE_SIZE) {

  544.         av_log(obj, AV_LOG_ERROR,

  545.                "The value set by option '%s' is not an image size.\n", o->name);

  546.         return AVERROR(EINVAL);

  547.     }

  548.     if (w<0 || h<0) {

  549.         av_log(obj, AV_LOG_ERROR,

  550.                "Invalid negative size value %dx%d for size '%s'\n", w, h, o->name);

  551.         return AVERROR(EINVAL);

  552.     }

  553.     *(int *)(((uint8_t *)target_obj)             + o->offset) = w;

  554.     *(int *)(((uint8_t *)target_obj+sizeof(int)) + o->offset) = h;

  555.     return 0;

  556. }

  557. 

  558. int av_opt_set_video_rate(void *obj, const char *name, AVRational val, int search_flags)

  559. {

  560.     void *target_obj;

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

  562. 

  563.     if (!o || !target_obj)

  564.         return AVERROR_OPTION_NOT_FOUND;

  565.     if (o->type != AV_OPT_TYPE_VIDEO_RATE) {

  566.         av_log(obj, AV_LOG_ERROR,

  567.                "The value set by option '%s' is not a video rate.\n", o->name);

  568.         return AVERROR(EINVAL);

  569.     }

  570.     if (val.num <= 0 || val.den <= 0)

  571.         return AVERROR(EINVAL);

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

  573. }

  574. 

  575. static int set_format(void *obj, const char *name, int fmt, int search_flags,

  576.                       enum AVOptionType type, const char *desc, int nb_fmts)

  577. {

  578.     void *target_obj;

  579.     const AVOption *o = av_opt_find2(obj, name, NULL, 0,

  580.                                      search_flags, &target_obj);

  581.     int min, max;

  582.     const AVClass *class = *(AVClass **)obj;

  583. 

  584.     if (!o || !target_obj)

  585.         return AVERROR_OPTION_NOT_FOUND;

  586.     if (o->type != type) {

  587.         av_log(obj, AV_LOG_ERROR,

  588.                "The value set by option '%s' is not a %s format", name, desc);

  589.         return AVERROR(EINVAL);

  590.     }

  591. 

  592. #if LIBAVUTIL_VERSION_MAJOR < 54

  593.     if (class->version && class->version < AV_VERSION_INT(52, 11, 100)) {

  594.         min = -1;

  595.         max = nb_fmts-1;

  596.     } else

  597. #endif

  598.     {

  599.         min = FFMAX(o->min, -1);

  600.         max = FFMIN(o->max, nb_fmts-1);

  601.     }

  602.     if (fmt < min || fmt > max) {

  603.         av_log(obj, AV_LOG_ERROR,

  604.                "Value %d for parameter '%s' out of %s format range [%d - %d]\n",

  605.                fmt, name, desc, min, max);

  606.         return AVERROR(ERANGE);

  607.     }

  608.     *(int *)(((uint8_t *)target_obj) + o->offset) = fmt;

  609.     return 0;

  610. }

  611. 

  612. int av_opt_set_pixel_fmt(void *obj, const char *name, enum AVPixelFormat fmt, int search_flags)

  613. {

  614.     return set_format(obj, name, fmt, search_flags, AV_OPT_TYPE_PIXEL_FMT, "pixel", AV_PIX_FMT_NB);

  615. }

  616. 

  617. int av_opt_set_sample_fmt(void *obj, const char *name, enum AVSampleFormat fmt, int search_flags)

  618. {

  619.     return set_format(obj, name, fmt, search_flags, AV_OPT_TYPE_SAMPLE_FMT, "sample", AV_SAMPLE_FMT_NB);

  620. }

  621. 

  622. int av_opt_set_channel_layout(void *obj, const char *name, int64_t cl, int search_flags)

  623. {

  624.     void *target_obj;

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

  626. 

  627.     if (!o || !target_obj)

  628.         return AVERROR_OPTION_NOT_FOUND;

  629.     if (o->type != AV_OPT_TYPE_CHANNEL_LAYOUT) {

  630.         av_log(obj, AV_LOG_ERROR,

  631.                "The value set by option '%s' is not a channel layout.\n", o->name);

  632.         return AVERROR(EINVAL);

  633.     }

  634.     *(int *)(((int64_t *)target_obj) + o->offset) = cl;

  635.     return 0;

  636. }

  637. 

  638. #if FF_API_OLD_AVOPTIONS

  639. /**

  640.  *

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

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

  643.  */

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

  645. {

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

  647.     void *dst;

  648.     uint8_t *bin;

  649.     int len, i;

  650.     if (!o)

  651.         return NULL;

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

  653.         return NULL;

  654. 

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

  656.     if (o_out) *o_out= o;

  657. 

  658.     switch (o->type) {

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

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

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

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

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

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

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

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

  667.     case AV_OPT_TYPE_BINARY:

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

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

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

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

  672.         break;

  673.     default: return NULL;

  674.     }

  675.     return buf;

  676. }

  677. #endif

  678. 

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

  680. {

  681.     void *dst, *target_obj;

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

  683.     uint8_t *bin, buf[128];

  684.     int len, i, ret;

  685.     int64_t i64;

  686. 

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

  688.         return AVERROR_OPTION_NOT_FOUND;

  689. 

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

  691. 

  692.     buf[0] = 0;

  693.     switch (o->type) {

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

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

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

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

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

  699.     case AV_OPT_TYPE_VIDEO_RATE:

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

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

  702.     case AV_OPT_TYPE_STRING:

  703.         if (*(uint8_t**)dst)

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

  705.         else

  706.             *out_val = av_strdup("");

  707.         return 0;

  708.     case AV_OPT_TYPE_BINARY:

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

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

  711.             return AVERROR(EINVAL);

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

  713.             return AVERROR(ENOMEM);

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

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

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

  717.         return 0;

  718.     case AV_OPT_TYPE_IMAGE_SIZE:

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

  720.         break;

  721.     case AV_OPT_TYPE_PIXEL_FMT:

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

  723.         break;

  724.     case AV_OPT_TYPE_SAMPLE_FMT:

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

  726.         break;

  727.     case AV_OPT_TYPE_DURATION:

  728.         i64 = *(int64_t *)dst;

  729.         ret = snprintf(buf, sizeof(buf), "%"PRIi64"d:%02d:%02d.%06d",

  730.                        i64 / 3600000000, (int)((i64 / 60000000) % 60),

  731.                        (int)((i64 / 1000000) % 60), (int)(i64 % 1000000));

  732.         break;

  733.     case AV_OPT_TYPE_COLOR:

  734.         ret = snprintf(buf, sizeof(buf), "0x%02x%02x%02x%02x", ((int *)dst)[0], ((int *)dst)[1], ((int *)dst)[2], ((int *)dst)[3]);

  735.         break;

  736.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  737.         i64 = *(int64_t *)dst;

  738.         ret = snprintf(buf, sizeof(buf), "0x%"PRIx64, i64);

  739.         break;

  740.     default:

  741.         return AVERROR(EINVAL);

  742.     }

  743. 

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

  745.         return AVERROR(EINVAL);

  746.     *out_val = av_strdup(buf);

  747.     return 0;

  748. }

  749. 

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

  751.                       int search_flags)

  752. {

  753.     void *dst, *target_obj;

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

  755.     if (!o || !target_obj)

  756.         goto error;

  757. 

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

  759. 

  760.     if (o_out) *o_out= o;

  761. 

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

  763. 

  764. error:

  765.     *den=*intnum=0;

  766.     return -1;

  767. }

  768. 

  769. #if FF_API_OLD_AVOPTIONS

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

  771. {

  772.     int64_t intnum=1;

  773.     double num=1;

  774.     int den=1;

  775. 

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

  777.         return NAN;

  778.     return num*intnum/den;

  779. }

  780. 

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

  782. {

  783.     int64_t intnum=1;

  784.     double num=1;

  785.     int den=1;

  786. 

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

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

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

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

  791.     else

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

  793. }

  794. 

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

  796. {

  797.     int64_t intnum=1;

  798.     double num=1;

  799.     int den=1;

  800. 

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

  802.         return -1;

  803.     return num*intnum/den;

  804. }

  805. #endif

  806. 

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

  808. {

  809.     int64_t intnum = 1;

  810.     double     num = 1;

  811.     int   ret, den = 1;

  812. 

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

  814.         return ret;

  815.     *out_val = num*intnum/den;

  816.     return 0;

  817. }

  818. 

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

  820. {

  821.     int64_t intnum = 1;

  822.     double     num = 1;

  823.     int   ret, den = 1;

  824. 

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

  826.         return ret;

  827.     *out_val = num*intnum/den;

  828.     return 0;

  829. }

  830. 

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

  832. {

  833.     int64_t intnum = 1;

  834.     double     num = 1;

  835.     int   ret, den = 1;

  836. 

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

  838.         return ret;

  839. 

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

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

  842.     else

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

  844.     return 0;

  845. }

  846. 

  847. int av_opt_get_image_size(void *obj, const char *name, int search_flags, int *w_out, int *h_out)

  848. {

  849.     void *dst, *target_obj;

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

  851.     if (!o || !target_obj)

  852.         return AVERROR_OPTION_NOT_FOUND;

  853.     if (o->type != AV_OPT_TYPE_IMAGE_SIZE) {

  854.         av_log(obj, AV_LOG_ERROR,

  855.                "The value for option '%s' is not an image size.\n", name);

  856.         return AVERROR(EINVAL);

  857.     }

  858. 

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

  860.     if (w_out) *w_out = *(int *)dst;

  861.     if (h_out) *h_out = *((int *)dst+1);

  862.     return 0;

  863. }

  864. 

  865. int av_opt_get_video_rate(void *obj, const char *name, int search_flags, AVRational *out_val)

  866. {

  867.     int64_t intnum = 1;

  868.     double     num = 1;

  869.     int   ret, den = 1;

  870. 

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

  872.         return ret;

  873. 

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

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

  876.     else

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

  878.     return 0;

  879. }

  880. 

  881. static int get_format(void *obj, const char *name, int search_flags, int *out_fmt,

  882.                       enum AVOptionType type, const char *desc)

  883. {

  884.     void *dst, *target_obj;

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

  886.     if (!o || !target_obj)

  887.         return AVERROR_OPTION_NOT_FOUND;

  888.     if (o->type != type) {

  889.         av_log(obj, AV_LOG_ERROR,

  890.                "The value for option '%s' is not a %s format.\n", desc, name);

  891.         return AVERROR(EINVAL);

  892.     }

  893. 

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

  895.     *out_fmt = *(int *)dst;

  896.     return 0;

  897. }

  898. 

  899. int av_opt_get_pixel_fmt(void *obj, const char *name, int search_flags, enum AVPixelFormat *out_fmt)

  900. {

  901.     return get_format(obj, name, search_flags, out_fmt, AV_OPT_TYPE_PIXEL_FMT, "pixel");

  902. }

  903. 

  904. int av_opt_get_sample_fmt(void *obj, const char *name, int search_flags, enum AVSampleFormat *out_fmt)

  905. {

  906.     return get_format(obj, name, search_flags, out_fmt, AV_OPT_TYPE_SAMPLE_FMT, "sample");

  907. }

  908. 

  909. int av_opt_get_channel_layout(void *obj, const char *name, int search_flags, int64_t *cl)

  910. {

  911.     void *dst, *target_obj;

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

  913.     if (!o || !target_obj)

  914.         return AVERROR_OPTION_NOT_FOUND;

  915.     if (o->type != AV_OPT_TYPE_CHANNEL_LAYOUT) {

  916.         av_log(obj, AV_LOG_ERROR,

  917.                "The value for option '%s' is not a channel layout.\n", name);

  918.         return AVERROR(EINVAL);

  919.     }

  920. 

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

  922.     *cl = *(int64_t *)dst;

  923.     return 0;

  924. }

  925. 

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

  927. {

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

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

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

  931.     int64_t res;

  932. 

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

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

  935.         return 0;

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

  937. }

  938. 

  939. static void log_value(void *av_log_obj, int level, double d)

  940. {

  941.     if      (d == INT_MAX) {

  942.         av_log(av_log_obj, level, "INT_MAX");

  943.     } else if (d == INT_MIN) {

  944.         av_log(av_log_obj, level, "INT_MIN");

  945.     } else if (d == UINT32_MAX) {

  946.         av_log(av_log_obj, level, "UINT32_MAX");

  947.     } else if (d == (double)INT64_MAX) {

  948.         av_log(av_log_obj, level, "I64_MAX");

  949.     } else if (d == INT64_MIN) {

  950.         av_log(av_log_obj, level, "I64_MIN");

  951.     } else if (d == FLT_MAX) {

  952.         av_log(av_log_obj, level, "FLT_MAX");

  953.     } else if (d == FLT_MIN) {

  954.         av_log(av_log_obj, level, "FLT_MIN");

  955.     } else if (d == -FLT_MAX) {

  956.         av_log(av_log_obj, level, "-FLT_MAX");

  957.     } else if (d == -FLT_MIN) {

  958.         av_log(av_log_obj, level, "-FLT_MIN");

  959.     } else if (d == DBL_MAX) {

  960.         av_log(av_log_obj, level, "DBL_MAX");

  961.     } else if (d == DBL_MIN) {

  962.         av_log(av_log_obj, level, "DBL_MIN");

  963.     } else if (d == -DBL_MAX) {

  964.         av_log(av_log_obj, level, "-DBL_MAX");

  965.     } else if (d == -DBL_MIN) {

  966.         av_log(av_log_obj, level, "-DBL_MIN");

  967.     } else {

  968.         av_log(av_log_obj, level, "%g", d);

  969.     }

  970. }

  971. 

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

  973.                      int req_flags, int rej_flags)

  974. {

  975.     const AVOption *opt=NULL;

  976.     AVOptionRanges *r;

  977.     int i;

  978. 

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

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

  981.             continue;

  982. 

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

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

  985.          * Only print items from the requested unit.

  986.          */

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

  988.             continue;

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

  990.             continue;

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

  992.             continue;

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

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

  995.         else

  996.             av_log(av_log_obj, AV_LOG_INFO, "  %s%-17s ",

  997.                    (opt->flags & AV_OPT_FLAG_FILTERING_PARAM) ? "" : "-",

  998.                    opt->name);

  999. 

  1000.         switch (opt->type) {

  1001.             case AV_OPT_TYPE_FLAGS:

  1002.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<flags>");

  1003.                 break;

  1004.             case AV_OPT_TYPE_INT:

  1005.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<int>");

  1006.                 break;

  1007.             case AV_OPT_TYPE_INT64:

  1008.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<int64>");

  1009.                 break;

  1010.             case AV_OPT_TYPE_DOUBLE:

  1011.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<double>");

  1012.                 break;

  1013.             case AV_OPT_TYPE_FLOAT:

  1014.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<float>");

  1015.                 break;

  1016.             case AV_OPT_TYPE_STRING:

  1017.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<string>");

  1018.                 break;

  1019.             case AV_OPT_TYPE_RATIONAL:

  1020.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<rational>");

  1021.                 break;

  1022.             case AV_OPT_TYPE_BINARY:

  1023.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<binary>");

  1024.                 break;

  1025.             case AV_OPT_TYPE_IMAGE_SIZE:

  1026.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<image_size>");

  1027.                 break;

  1028.             case AV_OPT_TYPE_VIDEO_RATE:

  1029.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<video_rate>");

  1030.                 break;

  1031.             case AV_OPT_TYPE_PIXEL_FMT:

  1032.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<pix_fmt>");

  1033.                 break;

  1034.             case AV_OPT_TYPE_SAMPLE_FMT:

  1035.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<sample_fmt>");

  1036.                 break;

  1037.             case AV_OPT_TYPE_DURATION:

  1038.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<duration>");

  1039.                 break;

  1040.             case AV_OPT_TYPE_COLOR:

  1041.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<color>");

  1042.                 break;

  1043.             case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1044.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<channel_layout>");

  1045.                 break;

  1046.             case AV_OPT_TYPE_CONST:

  1047.             default:

  1048.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "");

  1049.                 break;

  1050.         }

  1051.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_ENCODING_PARAM) ? 'E' : '.');

  1052.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_DECODING_PARAM) ? 'D' : '.');

  1053.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_FILTERING_PARAM)? 'F' : '.');

  1054.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_VIDEO_PARAM   ) ? 'V' : '.');

  1055.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_AUDIO_PARAM   ) ? 'A' : '.');

  1056.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_SUBTITLE_PARAM) ? 'S' : '.');

  1057.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_EXPORT)         ? 'X' : '.');

  1058.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_READONLY)       ? 'R' : '.');

  1059. 

  1060.         if (opt->help)

  1061.             av_log(av_log_obj, AV_LOG_INFO, " %s", opt->help);

  1062. 

  1063.         if (av_opt_query_ranges(&r, obj, opt->name, AV_OPT_SEARCH_FAKE_OBJ) >= 0) {

  1064.             switch (opt->type) {

  1065.             case AV_OPT_TYPE_INT:

  1066.             case AV_OPT_TYPE_INT64:

  1067.             case AV_OPT_TYPE_DOUBLE:

  1068.             case AV_OPT_TYPE_FLOAT:

  1069.             case AV_OPT_TYPE_RATIONAL:

  1070.                 for (i = 0; i < r->nb_ranges; i++) {

  1071.                     av_log(av_log_obj, AV_LOG_INFO, " (from ");

  1072.                     log_value(av_log_obj, AV_LOG_INFO, r->range[i]->value_min);

  1073.                     av_log(av_log_obj, AV_LOG_INFO, " to ");

  1074.                     log_value(av_log_obj, AV_LOG_INFO, r->range[i]->value_max);

  1075.                     av_log(av_log_obj, AV_LOG_INFO, ")");

  1076.                 }

  1077.                 break;

  1078.             }

  1079.             av_opt_freep_ranges(&r);

  1080.         }

  1081. 

  1082.         if (opt->type != AV_OPT_TYPE_CONST  &&

  1083.             opt->type != AV_OPT_TYPE_BINARY &&

  1084.                 !((opt->type == AV_OPT_TYPE_COLOR      ||

  1085.                    opt->type == AV_OPT_TYPE_IMAGE_SIZE ||

  1086.                    opt->type == AV_OPT_TYPE_STRING     ||

  1087.                    opt->type == AV_OPT_TYPE_VIDEO_RATE) &&

  1088.                   !opt->default_val.str)) {

  1089.             av_log(av_log_obj, AV_LOG_INFO, " (default ");

  1090.             switch (opt->type) {

  1091.             case AV_OPT_TYPE_FLAGS:

  1092.                 av_log(av_log_obj, AV_LOG_INFO, "%"PRIX64, opt->default_val.i64);

  1093.                 break;

  1094.             case AV_OPT_TYPE_DURATION:

  1095.             case AV_OPT_TYPE_INT:

  1096.             case AV_OPT_TYPE_INT64:

  1097.                 log_value(av_log_obj, AV_LOG_INFO, opt->default_val.i64);

  1098.                 break;

  1099.             case AV_OPT_TYPE_DOUBLE:

  1100.             case AV_OPT_TYPE_FLOAT:

  1101.                 log_value(av_log_obj, AV_LOG_INFO, opt->default_val.dbl);

  1102.                 break;

  1103.             case AV_OPT_TYPE_RATIONAL: {

  1104.                 AVRational q = av_d2q(opt->default_val.dbl, INT_MAX);

  1105.                 av_log(av_log_obj, AV_LOG_INFO, "%d/%d", q.num, q.den); }

  1106.                 break;

  1107.             case AV_OPT_TYPE_PIXEL_FMT:

  1108.                 av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(av_get_pix_fmt_name(opt->default_val.i64), "none"));

  1109.                 break;

  1110.             case AV_OPT_TYPE_SAMPLE_FMT:

  1111.                 av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(av_get_sample_fmt_name(opt->default_val.i64), "none"));

  1112.                 break;

  1113.             case AV_OPT_TYPE_COLOR:

  1114.             case AV_OPT_TYPE_IMAGE_SIZE:

  1115.             case AV_OPT_TYPE_STRING:

  1116.             case AV_OPT_TYPE_VIDEO_RATE:

  1117.                 av_log(av_log_obj, AV_LOG_INFO, "\"%s\"", opt->default_val.str);

  1118.                 break;

  1119.             case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1120.                 av_log(av_log_obj, AV_LOG_INFO, "0x%"PRIx64, opt->default_val.i64);

  1121.                 break;

  1122.             }

  1123.             av_log(av_log_obj, AV_LOG_INFO, ")");

  1124.         }

  1125. 

  1126.         av_log(av_log_obj, AV_LOG_INFO, "\n");

  1127.         if (opt->unit && opt->type != AV_OPT_TYPE_CONST) {

  1128.             opt_list(obj, av_log_obj, opt->unit, req_flags, rej_flags);

  1129.         }

  1130.     }

  1131. }

  1132. 

  1133. int av_opt_show2(void *obj, void *av_log_obj, int req_flags, int rej_flags)

  1134. {

  1135.     if (!obj)

  1136.         return -1;

  1137. 

  1138.     av_log(av_log_obj, AV_LOG_INFO, "%s AVOptions:\n", (*(AVClass**)obj)->class_name);

  1139. 

  1140.     opt_list(obj, av_log_obj, NULL, req_flags, rej_flags);

  1141. 

  1142.     return 0;

  1143. }

  1144. 

  1145. void av_opt_set_defaults(void *s)

  1146. {

  1147. #if FF_API_OLD_AVOPTIONS

  1148.     av_opt_set_defaults2(s, 0, 0);

  1149. }

  1150. 

  1151. void av_opt_set_defaults2(void *s, int mask, int flags)

  1152. {

  1153. #endif

  1154.     const AVClass *class = *(AVClass **)s;

  1155.     const AVOption *opt = NULL;

  1156.     while ((opt = av_opt_next(s, opt)) != NULL) {

  1157.         void *dst = ((uint8_t*)s) + opt->offset;

  1158. #if FF_API_OLD_AVOPTIONS

  1159.         if ((opt->flags & mask) != flags)

  1160.             continue;

  1161. #endif

  1162. 

  1163.         if (opt->flags & AV_OPT_FLAG_READONLY)

  1164.             continue;

  1165. 

  1166.         switch (opt->type) {

  1167.             case AV_OPT_TYPE_CONST:

  1168.                 /* Nothing to be done here */

  1169.             break;

  1170.             case AV_OPT_TYPE_FLAGS:

  1171.             case AV_OPT_TYPE_INT:

  1172.             case AV_OPT_TYPE_INT64:

  1173.             case AV_OPT_TYPE_DURATION:

  1174.             case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1175.                 write_number(s, opt, dst, 1, 1, opt->default_val.i64);

  1176.             break;

  1177.             case AV_OPT_TYPE_DOUBLE:

  1178.             case AV_OPT_TYPE_FLOAT: {

  1179.                 double val;

  1180.                 val = opt->default_val.dbl;

  1181.                 write_number(s, opt, dst, val, 1, 1);

  1182.             }

  1183.             break;

  1184.             case AV_OPT_TYPE_RATIONAL: {

  1185.                 AVRational val;

  1186.                 val = av_d2q(opt->default_val.dbl, INT_MAX);

  1187.                 write_number(s, opt, dst, 1, val.den, val.num);

  1188.             }

  1189.             break;

  1190.             case AV_OPT_TYPE_COLOR:

  1191.                 set_string_color(s, opt, opt->default_val.str, dst);

  1192.                 break;

  1193.             case AV_OPT_TYPE_STRING:

  1194.                 set_string(s, opt, opt->default_val.str, dst);

  1195.                 break;

  1196.             case AV_OPT_TYPE_IMAGE_SIZE:

  1197.                 set_string_image_size(s, opt, opt->default_val.str, dst);

  1198.                 break;

  1199.             case AV_OPT_TYPE_VIDEO_RATE:

  1200.                 set_string_video_rate(s, opt, opt->default_val.str, dst);

  1201.                 break;

  1202.             case AV_OPT_TYPE_PIXEL_FMT:

  1203. #if LIBAVUTIL_VERSION_MAJOR < 54

  1204.                 if (class->version && class->version < AV_VERSION_INT(52, 10, 100))

  1205.                     av_opt_set(s, opt->name, opt->default_val.str, 0);

  1206.                 else

  1207. #endif

  1208.                     write_number(s, opt, dst, 1, 1, opt->default_val.i64);

  1209.                 break;

  1210.             case AV_OPT_TYPE_SAMPLE_FMT:

  1211. #if LIBAVUTIL_VERSION_MAJOR < 54

  1212.                 if (class->version && class->version < AV_VERSION_INT(52, 10, 100))

  1213.                     av_opt_set(s, opt->name, opt->default_val.str, 0);

  1214.                 else

  1215. #endif

  1216.                     write_number(s, opt, dst, 1, 1, opt->default_val.i64);

  1217.                 break;

  1218.             case AV_OPT_TYPE_BINARY:

  1219.                 /* Cannot set default for binary */

  1220.             break;

  1221.             default:

  1222.                 av_log(s, AV_LOG_DEBUG, "AVOption type %d of option %s not implemented yet\n", opt->type, opt->name);

  1223.         }

  1224.     }

  1225. }

  1226. 

  1227. /**

  1228.  * Store the value in the field in ctx that is named like key.

  1229.  * ctx must be an AVClass context, storing is done using AVOptions.

  1230.  *

  1231.  * @param buf the string to parse, buf will be updated to point at the

  1232.  * separator just after the parsed key/value pair

  1233.  * @param key_val_sep a 0-terminated list of characters used to

  1234.  * separate key from value

  1235.  * @param pairs_sep a 0-terminated list of characters used to separate

  1236.  * two pairs from each other

  1237.  * @return 0 if the key/value pair has been successfully parsed and

  1238.  * set, or a negative value corresponding to an AVERROR code in case

  1239.  * of error:

  1240.  * AVERROR(EINVAL) if the key/value pair cannot be parsed,

  1241.  * the error code issued by av_opt_set() if the key/value pair

  1242.  * cannot be set

  1243.  */

  1244. static int parse_key_value_pair(void *ctx, const char **buf,

  1245.                                 const char *key_val_sep, const char *pairs_sep)

  1246. {

  1247.     char *key = av_get_token(buf, key_val_sep);

  1248.     char *val;

  1249.     int ret;

  1250. 

  1251.     if (!key)

  1252.         return AVERROR(ENOMEM);

  1253. 

  1254.     if (*key && strspn(*buf, key_val_sep)) {

  1255.         (*buf)++;

  1256.         val = av_get_token(buf, pairs_sep);

  1257.         if (!val) {

  1258.             av_freep(&key);

  1259.             return AVERROR(ENOMEM);

  1260.         }

  1261.     } else {

  1262.         av_log(ctx, AV_LOG_ERROR, "Missing key or no key/value separator found after key '%s'\n", key);

  1263.         av_free(key);

  1264.         return AVERROR(EINVAL);

  1265.     }

  1266. 

  1267.     av_log(ctx, AV_LOG_DEBUG, "Setting entry with key '%s' to value '%s'\n", key, val);

  1268. 

  1269.     ret = av_opt_set(ctx, key, val, AV_OPT_SEARCH_CHILDREN);

  1270.     if (ret == AVERROR_OPTION_NOT_FOUND)

  1271.         av_log(ctx, AV_LOG_ERROR, "Key '%s' not found.\n", key);

  1272. 

  1273.     av_free(key);

  1274.     av_free(val);

  1275.     return ret;

  1276. }

  1277. 

  1278. int av_set_options_string(void *ctx, const char *opts,

  1279.                           const char *key_val_sep, const char *pairs_sep)

  1280. {

  1281.     int ret, count = 0;

  1282. 

  1283.     if (!opts)

  1284.         return 0;

  1285. 

  1286.     while (*opts) {

  1287.         if ((ret = parse_key_value_pair(ctx, &opts, key_val_sep, pairs_sep)) < 0)

  1288.             return ret;

  1289.         count++;

  1290. 

  1291.         if (*opts)

  1292.             opts++;

  1293.     }

  1294. 

  1295.     return count;

  1296. }

  1297. 

  1298. #define WHITESPACES " \n\t"

  1299. 

  1300. static int is_key_char(char c)

  1301. {

  1302.     return (unsigned)((c | 32) - 'a') < 26 ||

  1303.            (unsigned)(c - '0') < 10 ||

  1304.            c == '-' || c == '_' || c == '/' || c == '.';

  1305. }

  1306. 

  1307. /**

  1308.  * Read a key from a string.

  1309.  *

  1310.  * The key consists of is_key_char characters and must be terminated by a

  1311.  * character from the delim string; spaces are ignored.

  1312.  *

  1313.  * @return  0 for success (even with ellipsis), <0 for failure

  1314.  */

  1315. static int get_key(const char **ropts, const char *delim, char **rkey)

  1316. {

  1317.     const char *opts = *ropts;

  1318.     const char *key_start, *key_end;

  1319. 

  1320.     key_start = opts += strspn(opts, WHITESPACES);

  1321.     while (is_key_char(*opts))

  1322.         opts++;

  1323.     key_end = opts;

  1324.     opts += strspn(opts, WHITESPACES);

  1325.     if (!*opts || !strchr(delim, *opts))

  1326.         return AVERROR(EINVAL);

  1327.     opts++;

  1328.     if (!(*rkey = av_malloc(key_end - key_start + 1)))

  1329.         return AVERROR(ENOMEM);

  1330.     memcpy(*rkey, key_start, key_end - key_start);

  1331.     (*rkey)[key_end - key_start] = 0;

  1332.     *ropts = opts;

  1333.     return 0;

  1334. }

  1335. 

  1336. int av_opt_get_key_value(const char **ropts,

  1337.                          const char *key_val_sep, const char *pairs_sep,

  1338.                          unsigned flags,

  1339.                          char **rkey, char **rval)

  1340. {

  1341.     int ret;

  1342.     char *key = NULL, *val;

  1343.     const char *opts = *ropts;

  1344. 

  1345.     if ((ret = get_key(&opts, key_val_sep, &key)) < 0 &&

  1346.         !(flags & AV_OPT_FLAG_IMPLICIT_KEY))

  1347.         return AVERROR(EINVAL);

  1348.     if (!(val = av_get_token(&opts, pairs_sep))) {

  1349.         av_free(key);

  1350.         return AVERROR(ENOMEM);

  1351.     }

  1352.     *ropts = opts;

  1353.     *rkey  = key;

  1354.     *rval  = val;

  1355.     return 0;

  1356. }

  1357. 

  1358. int av_opt_set_from_string(void *ctx, const char *opts,

  1359.                            const char *const *shorthand,

  1360.                            const char *key_val_sep, const char *pairs_sep)

  1361. {

  1362.     int ret, count = 0;

  1363.     const char *dummy_shorthand = NULL;

  1364.     char *av_uninit(parsed_key), *av_uninit(value);

  1365.     const char *key;

  1366. 

  1367.     if (!opts)

  1368.         return 0;

  1369.     if (!shorthand)

  1370.         shorthand = &dummy_shorthand;

  1371. 

  1372.     while (*opts) {

  1373.         ret = av_opt_get_key_value(&opts, key_val_sep, pairs_sep,

  1374.                                    *shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,

  1375.                                    &parsed_key, &value);

  1376.         if (ret < 0) {

  1377.             if (ret == AVERROR(EINVAL))

  1378.                 av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", opts);

  1379.             else

  1380.                 av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", opts,

  1381.                        av_err2str(ret));

  1382.             return ret;

  1383.         }

  1384.         if (*opts)

  1385.             opts++;

  1386.         if (parsed_key) {

  1387.             key = parsed_key;

  1388.             while (*shorthand) /* discard all remaining shorthand */

  1389.                 shorthand++;

  1390.         } else {

  1391.             key = *(shorthand++);

  1392.         }

  1393. 

  1394.         av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);

  1395.         if ((ret = av_opt_set(ctx, key, value, 0)) < 0) {

  1396.             if (ret == AVERROR_OPTION_NOT_FOUND)

  1397.                 av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);

  1398.             av_free(value);

  1399.             av_free(parsed_key);

  1400.             return ret;

  1401.         }

  1402. 

  1403.         av_free(value);

  1404.         av_free(parsed_key);

  1405.         count++;

  1406.     }

  1407.     return count;

  1408. }

  1409. 

  1410. void av_opt_free(void *obj)

  1411. {

  1412.     const AVOption *o = NULL;

  1413.     while ((o = av_opt_next(obj, o)))

  1414.         if (o->type == AV_OPT_TYPE_STRING || o->type == AV_OPT_TYPE_BINARY)

  1415.             av_freep((uint8_t *)obj + o->offset);

  1416. }

  1417. 

  1418. int av_opt_set_dict2(void *obj, AVDictionary **options, int search_flags)

  1419. {

  1420.     AVDictionaryEntry *t = NULL;

  1421.     AVDictionary    *tmp = NULL;

  1422.     int ret = 0;

  1423. 

  1424.     if (!options)

  1425.         return 0;

  1426. 

  1427.     while ((t = av_dict_get(*options, "", t, AV_DICT_IGNORE_SUFFIX))) {

  1428.         ret = av_opt_set(obj, t->key, t->value, search_flags);

  1429.         if (ret == AVERROR_OPTION_NOT_FOUND)

  1430.             av_dict_set(&tmp, t->key, t->value, 0);

  1431.         else if (ret < 0) {

  1432.             av_log(obj, AV_LOG_ERROR, "Error setting option %s to value %s.\n", t->key, t->value);

  1433.             break;

  1434.         }

  1435.         ret = 0;

  1436.     }

  1437.     av_dict_free(options);

  1438.     *options = tmp;

  1439.     return ret;

  1440. }

  1441. 

  1442. int av_opt_set_dict(void *obj, AVDictionary **options)

  1443. {

  1444.     return av_opt_set_dict2(obj, options, 0);

  1445. }

  1446. 

  1447. const AVOption *av_opt_find(void *obj, const char *name, const char *unit,

  1448.                             int opt_flags, int search_flags)

  1449. {

  1450.     return av_opt_find2(obj, name, unit, opt_flags, search_flags, NULL);

  1451. }

  1452. 

  1453. const AVOption *av_opt_find2(void *obj, const char *name, const char *unit,

  1454.                              int opt_flags, int search_flags, void **target_obj)

  1455. {

  1456.     const AVClass  *c;

  1457.     const AVOption *o = NULL;

  1458. 

  1459.     if(!obj)

  1460.         return NULL;

  1461. 

  1462.     c= *(AVClass**)obj;

  1463. 

  1464.     if (!c)

  1465.         return NULL;

  1466. 

  1467.     if (search_flags & AV_OPT_SEARCH_CHILDREN) {

  1468.         if (search_flags & AV_OPT_SEARCH_FAKE_OBJ) {

  1469.             const AVClass *child = NULL;

  1470.             while (child = av_opt_child_class_next(c, child))

  1471.                 if (o = av_opt_find2(&child, name, unit, opt_flags, search_flags, NULL))

  1472.                     return o;

  1473.         } else {

  1474.             void *child = NULL;

  1475.             while (child = av_opt_child_next(obj, child))

  1476.                 if (o = av_opt_find2(child, name, unit, opt_flags, search_flags, target_obj))

  1477.                     return o;

  1478.         }

  1479.     }

  1480. 

  1481.     while (o = av_opt_next(obj, o)) {

  1482.         if (!strcmp(o->name, name) && (o->flags & opt_flags) == opt_flags &&

  1483.             ((!unit && o->type != AV_OPT_TYPE_CONST) ||

  1484.              (unit  && o->type == AV_OPT_TYPE_CONST && o->unit && !strcmp(o->unit, unit)))) {

  1485.             if (target_obj) {

  1486.                 if (!(search_flags & AV_OPT_SEARCH_FAKE_OBJ))

  1487.                     *target_obj = obj;

  1488.                 else

  1489.                     *target_obj = NULL;

  1490.             }

  1491.             return o;

  1492.         }

  1493.     }

  1494.     return NULL;

  1495. }

  1496. 

  1497. void *av_opt_child_next(void *obj, void *prev)

  1498. {

  1499.     const AVClass *c = *(AVClass**)obj;

  1500.     if (c->child_next)

  1501.         return c->child_next(obj, prev);

  1502.     return NULL;

  1503. }

  1504. 

  1505. const AVClass *av_opt_child_class_next(const AVClass *parent, const AVClass *prev)

  1506. {

  1507.     if (parent->child_class_next)

  1508.         return parent->child_class_next(prev);

  1509.     return NULL;

  1510. }

  1511. 

  1512. void *av_opt_ptr(const AVClass *class, void *obj, const char *name)

  1513. {

  1514.     const AVOption *opt= av_opt_find2(&class, name, NULL, 0, AV_OPT_SEARCH_FAKE_OBJ, NULL);

  1515.     if(!opt)

  1516.         return NULL;

  1517.     return (uint8_t*)obj + opt->offset;

  1518. }

  1519. 

  1520. static int opt_size(enum AVOptionType type)

  1521. {

  1522.     switch(type) {

  1523.     case AV_OPT_TYPE_INT:

  1524.     case AV_OPT_TYPE_FLAGS:     return sizeof(int);

  1525.     case AV_OPT_TYPE_DURATION:

  1526.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1527.     case AV_OPT_TYPE_INT64:     return sizeof(int64_t);

  1528.     case AV_OPT_TYPE_DOUBLE:    return sizeof(double);

  1529.     case AV_OPT_TYPE_FLOAT:     return sizeof(float);

  1530.     case AV_OPT_TYPE_STRING:    return sizeof(uint8_t*);

  1531.     case AV_OPT_TYPE_VIDEO_RATE:

  1532.     case AV_OPT_TYPE_RATIONAL:  return sizeof(AVRational);

  1533.     case AV_OPT_TYPE_BINARY:    return sizeof(uint8_t*) + sizeof(int);

  1534.     case AV_OPT_TYPE_IMAGE_SIZE:return sizeof(int[2]);

  1535.     case AV_OPT_TYPE_PIXEL_FMT: return sizeof(enum AVPixelFormat);

  1536.     case AV_OPT_TYPE_SAMPLE_FMT:return sizeof(enum AVSampleFormat);

  1537.     case AV_OPT_TYPE_COLOR:     return 4;

  1538.     }

  1539.     return 0;

  1540. }

  1541. 

  1542. int av_opt_copy(void *dst, void *src)

  1543. {

  1544.     const AVOption *o = NULL;

  1545.     const AVClass *c;

  1546.     int ret = 0;

  1547. 

  1548.     if (!src)

  1549.         return 0;

  1550. 

  1551.     c = *(AVClass**)src;

  1552.     if (*(AVClass**)dst && c != *(AVClass**)dst)

  1553.         return AVERROR(EINVAL);

  1554. 

  1555.     while ((o = av_opt_next(src, o))) {

  1556.         void *field_dst = ((uint8_t*)dst) + o->offset;

  1557.         void *field_src = ((uint8_t*)src) + o->offset;

  1558.         uint8_t **field_dst8 = (uint8_t**)field_dst;

  1559.         uint8_t **field_src8 = (uint8_t**)field_src;

  1560. 

  1561.         if (o->type == AV_OPT_TYPE_STRING) {

  1562.             set_string(dst, o, *field_src8, field_dst8);

  1563.             if (*field_src8 && !*field_dst8)

  1564.                 ret = AVERROR(ENOMEM);

  1565.         } else if (o->type == AV_OPT_TYPE_BINARY) {

  1566.             int len = *(int*)(field_src8 + 1);

  1567.             if (*field_dst8 != *field_src8)

  1568.                 av_freep(field_dst8);

  1569.             *field_dst8 = av_memdup(*field_src8, len);

  1570.             if (len && !*field_dst8) {

  1571.                 ret = AVERROR(ENOMEM);

  1572.                 len = 0;

  1573.             }

  1574.             *(int*)(field_dst8 + 1) = len;

  1575.         } else if (o->type == AV_OPT_TYPE_CONST) {

  1576.             // do nothing

  1577.         } else {

  1578.             memcpy(field_dst, field_src, opt_size(o->type));

  1579.         }

  1580.     }

  1581.     return ret;

  1582. }

  1583. 

  1584. int av_opt_query_ranges(AVOptionRanges **ranges_arg, void *obj, const char *key, int flags)

  1585. {

  1586.     int ret;

  1587.     const AVClass *c = *(AVClass**)obj;

  1588.     int (*callback)(AVOptionRanges **, void *obj, const char *key, int flags) = NULL;

  1589. 

  1590.     if (c->version > (52 << 16 | 11 << 8))

  1591.         callback = c->query_ranges;

  1592. 

  1593.     if (!callback)

  1594.         callback = av_opt_query_ranges_default;

  1595. 

  1596.     ret = callback(ranges_arg, obj, key, flags);

  1597.     if (ret >= 0) {

  1598.         if (!(flags & AV_OPT_MULTI_COMPONENT_RANGE))

  1599.             ret = 1;

  1600.         (*ranges_arg)->nb_components = ret;

  1601.     }

  1602.     return ret;

  1603. }

  1604. 

  1605. int av_opt_query_ranges_default(AVOptionRanges **ranges_arg, void *obj, const char *key, int flags)

  1606. {

  1607.     AVOptionRanges *ranges = av_mallocz(sizeof(*ranges));

  1608.     AVOptionRange **range_array = av_mallocz(sizeof(void*));

  1609.     AVOptionRange *range = av_mallocz(sizeof(*range));

  1610.     const AVOption *field = av_opt_find(obj, key, NULL, 0, flags);

  1611.     int ret;

  1612. 

  1613.     *ranges_arg = NULL;

  1614. 

  1615.     if (!ranges || !range || !range_array || !field) {

  1616.         ret = AVERROR(ENOMEM);

  1617.         goto fail;

  1618.     }

  1619. 

  1620.     ranges->range = range_array;

  1621.     ranges->range[0] = range;

  1622.     ranges->nb_ranges = 1;

  1623.     ranges->nb_components = 1;

  1624.     range->is_range = 1;

  1625.     range->value_min = field->min;

  1626.     range->value_max = field->max;

  1627. 

  1628.     switch (field->type) {

  1629.     case AV_OPT_TYPE_INT:

  1630.     case AV_OPT_TYPE_INT64:

  1631.     case AV_OPT_TYPE_PIXEL_FMT:

  1632.     case AV_OPT_TYPE_SAMPLE_FMT:

  1633.     case AV_OPT_TYPE_FLOAT:

  1634.     case AV_OPT_TYPE_DOUBLE:

  1635.     case AV_OPT_TYPE_DURATION:

  1636.     case AV_OPT_TYPE_COLOR:

  1637.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1638.         break;

  1639.     case AV_OPT_TYPE_STRING:

  1640.         range->component_min = 0;

  1641.         range->component_max = 0x10FFFF; // max unicode value

  1642.         range->value_min = -1;

  1643.         range->value_max = INT_MAX;

  1644.         break;

  1645.     case AV_OPT_TYPE_RATIONAL:

  1646.         range->component_min = INT_MIN;

  1647.         range->component_max = INT_MAX;

  1648.         break;

  1649.     case AV_OPT_TYPE_IMAGE_SIZE:

  1650.         range->component_min = 0;

  1651.         range->component_max = INT_MAX/128/8;

  1652.         range->value_min = 0;

  1653.         range->value_max = INT_MAX/8;

  1654.         break;

  1655.     case AV_OPT_TYPE_VIDEO_RATE:

  1656.         range->component_min = 1;

  1657.         range->component_max = INT_MAX;

  1658.         range->value_min = 1;

  1659.         range->value_max = INT_MAX;

  1660.         break;

  1661.     default:

  1662.         ret = AVERROR(ENOSYS);

  1663.         goto fail;

  1664.     }

  1665. 

  1666.     *ranges_arg = ranges;

  1667.     return 1;

  1668. fail:

  1669.     av_free(ranges);

  1670.     av_free(range);

  1671.     av_free(range_array);

  1672.     return ret;

  1673. }

  1674. 

  1675. void av_opt_freep_ranges(AVOptionRanges **rangesp)

  1676. {

  1677.     int i;

  1678.     AVOptionRanges *ranges = *rangesp;

  1679. 

  1680.     if (!ranges)

  1681.         return;

  1682. 

  1683.     for (i = 0; i < ranges->nb_ranges * ranges->nb_components; i++) {

  1684.         AVOptionRange *range = ranges->range[i];

  1685.         if (range) {

  1686.             av_freep(&range->str);

  1687.             av_freep(&ranges->range[i]);

  1688.         }

  1689.     }

  1690.     av_freep(&ranges->range);

  1691.     av_freep(rangesp);

  1692. }

  1693. 

  1694. #ifdef TEST

  1695. 

  1696. typedef struct TestContext

  1697. {

  1698.     const AVClass *class;

  1699.     int num;

  1700.     int toggle;

  1701.     char *string;

  1702.     int flags;

  1703.     AVRational rational;

  1704.     AVRational video_rate;

  1705.     int w, h;

  1706.     enum AVPixelFormat pix_fmt;

  1707.     enum AVSampleFormat sample_fmt;

  1708.     int64_t duration;

  1709.     uint8_t color[4];

  1710.     int64_t channel_layout;

  1711. } TestContext;

  1712. 

  1713. #define OFFSET(x) offsetof(TestContext, x)

  1714. 

  1715. #define TEST_FLAG_COOL 01

  1716. #define TEST_FLAG_LAME 02

  1717. #define TEST_FLAG_MU   04

  1718. 

  1719. static const AVOption test_options[]= {

  1720. {"num",      "set num",        OFFSET(num),      AV_OPT_TYPE_INT,      {.i64 = 0},       0,        100                 },

  1721. {"toggle",   "set toggle",     OFFSET(toggle),   AV_OPT_TYPE_INT,      {.i64 = 0},       0,        1                   },

  1722. {"rational", "set rational",   OFFSET(rational), AV_OPT_TYPE_RATIONAL, {.dbl = 0},       0,        10                  },

  1723. {"string",   "set string",     OFFSET(string),   AV_OPT_TYPE_STRING,   {.str = "default"}, CHAR_MIN, CHAR_MAX          },

  1724. {"flags",    "set flags",      OFFSET(flags),    AV_OPT_TYPE_FLAGS,    {.i64 = 0},       0,        INT_MAX, 0, "flags" },

  1725. {"cool",     "set cool flag ", 0,                AV_OPT_TYPE_CONST,    {.i64 = TEST_FLAG_COOL}, INT_MIN,  INT_MAX, 0, "flags" },

  1726. {"lame",     "set lame flag ", 0,                AV_OPT_TYPE_CONST,    {.i64 = TEST_FLAG_LAME}, INT_MIN,  INT_MAX, 0, "flags" },

  1727. {"mu",       "set mu flag ",   0,                AV_OPT_TYPE_CONST,    {.i64 = TEST_FLAG_MU},   INT_MIN,  INT_MAX, 0, "flags" },

  1728. {"size",     "set size",       OFFSET(w),        AV_OPT_TYPE_IMAGE_SIZE,{0},             0,        0                   },

  1729. {"pix_fmt",  "set pixfmt",     OFFSET(pix_fmt),  AV_OPT_TYPE_PIXEL_FMT, {.i64 = AV_PIX_FMT_NONE}, -1, INT_MAX},

  1730. {"sample_fmt", "set samplefmt", OFFSET(sample_fmt), AV_OPT_TYPE_SAMPLE_FMT, {.i64 = AV_SAMPLE_FMT_NONE}, -1, INT_MAX},

  1731. {"video_rate", "set videorate", OFFSET(video_rate), AV_OPT_TYPE_VIDEO_RATE,  {.str = "25"}, 0,     0                   },

  1732. {"duration", "set duration",   OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, INT64_MAX},

  1733. {"color", "set color",   OFFSET(color), AV_OPT_TYPE_COLOR, {.str = "pink"}, 0, 0},

  1734. {"cl", "set channel layout", OFFSET(channel_layout), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64 = AV_CH_LAYOUT_HEXAGONAL}, 0, INT64_MAX},

  1735. {NULL},

  1736. };

  1737. 

  1738. static const char *test_get_name(void *ctx)

  1739. {

  1740.     return "test";

  1741. }

  1742. 

  1743. static const AVClass test_class = {

  1744.     "TestContext",

  1745.     test_get_name,

  1746.     test_options

  1747. };

  1748. 

  1749. int main(void)

  1750. {

  1751.     int i;

  1752. 

  1753.     printf("\nTesting av_set_options_string()\n");

  1754.     {

  1755.         TestContext test_ctx = { 0 };

  1756.         static const char * const options[] = {

  1757.             "",

  1758.             ":",

  1759.             "=",

  1760.             "foo=:",

  1761.             ":=foo",

  1762.             "=foo",

  1763.             "foo=",

  1764.             "foo",

  1765.             "foo=val",

  1766.             "foo==val",

  1767.             "toggle=:",

  1768.             "string=:",

  1769.             "toggle=1 : foo",

  1770.             "toggle=100",

  1771.             "toggle==1",

  1772.             "flags=+mu-lame : num=42: toggle=0",

  1773.             "num=42 : string=blahblah",

  1774.             "rational=0 : rational=1/2 : rational=1/-1",

  1775.             "rational=-1/0",

  1776.             "size=1024x768",

  1777.             "size=pal",

  1778.             "size=bogus",

  1779.             "pix_fmt=yuv420p",

  1780.             "pix_fmt=2",

  1781.             "pix_fmt=bogus",

  1782.             "sample_fmt=s16",

  1783.             "sample_fmt=2",

  1784.             "sample_fmt=bogus",

  1785.             "video_rate=pal",

  1786.             "video_rate=25",

  1787.             "video_rate=30000/1001",

  1788.             "video_rate=30/1.001",

  1789.             "video_rate=bogus",

  1790.             "duration=bogus",

  1791.             "duration=123.45",

  1792.             "duration=1\\:23\\:45.67",

  1793.             "color=blue",

  1794.             "color=0x223300",

  1795.             "color=0x42FF07AA",

  1796.             "cl=stereo+downmix",

  1797.             "cl=foo",

  1798.         };

  1799. 

  1800.         test_ctx.class = &test_class;

  1801.         av_opt_set_defaults(&test_ctx);

  1802. 

  1803.         av_log_set_level(AV_LOG_DEBUG);

  1804. 

  1805.         for (i=0; i < FF_ARRAY_ELEMS(options); i++) {

  1806.             av_log(&test_ctx, AV_LOG_DEBUG, "Setting options string '%s'\n", options[i]);

  1807.             if (av_set_options_string(&test_ctx, options[i], "=", ":") < 0)

  1808.                 av_log(&test_ctx, AV_LOG_ERROR, "Error setting options string: '%s'\n", options[i]);

  1809.             printf("\n");

  1810.         }

  1811.         av_opt_free(&test_ctx);

  1812.     }

  1813. 

  1814.     printf("\nTesting av_opt_set_from_string()\n");

  1815.     {

  1816.         TestContext test_ctx = { 0 };

  1817.         static const char * const options[] = {

  1818.             "",

  1819.             "5",

  1820.             "5:hello",

  1821.             "5:hello:size=pal",

  1822.             "5:size=pal:hello",

  1823.             ":",

  1824.             "=",

  1825.             " 5 : hello : size = pal ",

  1826.             "a_very_long_option_name_that_will_need_to_be_ellipsized_around_here=42"

  1827.         };

  1828.         static const char * const shorthand[] = { "num", "string", NULL };

  1829. 

  1830.         test_ctx.class = &test_class;

  1831.         av_opt_set_defaults(&test_ctx);

  1832. 

  1833.         av_log_set_level(AV_LOG_DEBUG);

  1834. 

  1835.         for (i=0; i < FF_ARRAY_ELEMS(options); i++) {

  1836.             av_log(&test_ctx, AV_LOG_DEBUG, "Setting options string '%s'\n", options[i]);

  1837.             if (av_opt_set_from_string(&test_ctx, options[i], shorthand, "=", ":") < 0)

  1838.                 av_log(&test_ctx, AV_LOG_ERROR, "Error setting options string: '%s'\n", options[i]);

  1839.             printf("\n");

  1840.         }

  1841.         av_opt_free(&test_ctx);

  1842.     }

  1843. 

  1844.     return 0;

  1845. }

  1846. 

  1847. #endif