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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. 

  103.     switch (o->type) {

  104.     case AV_OPT_TYPE_FLAGS:

  105.     case AV_OPT_TYPE_PIXEL_FMT:

  106.     case AV_OPT_TYPE_SAMPLE_FMT:

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

  108.     case AV_OPT_TYPE_DURATION:

  109.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

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

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

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

  113.     case AV_OPT_TYPE_RATIONAL:

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

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

  116.         break;

  117.     default:

  118.         return AVERROR(EINVAL);

  119.     }

  120.     return 0;

  121. }

  122. 

  123. static const double const_values[] = {

  124.     M_PI,

  125.     M_E,

  126.     FF_QP2LAMBDA,

  127.     0

  128. };

  129. 

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

  131.     "PI",

  132.     "E",

  133.     "QP2LAMBDA",

  134.     0

  135. };

  136. 

  137. static int hexchar2int(char c) {

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

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

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

  141.     return -1;

  142. }

  143. 

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

  145. {

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

  147.     uint8_t *bin, *ptr;

  148.     int len = strlen(val);

  149. 

  150.     av_freep(dst);

  151.     *lendst = 0;

  152. 

  153.     if (len & 1)

  154.         return AVERROR(EINVAL);

  155.     len /= 2;

  156. 

  157.     ptr = bin = av_malloc(len);

  158.     while (*val) {

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

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

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

  162.             av_free(bin);

  163.             return AVERROR(EINVAL);

  164.         }

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

  166.     }

  167.     *dst = bin;

  168.     *lendst = len;

  169. 

  170.     return 0;

  171. }

  172. 

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

  174. {

  175.     av_freep(dst);

  176.     *dst = av_strdup(val);

  177.     return 0;

  178. }

  179. 

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

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

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

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

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

  185. 

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

  187. {

  188.     int ret = 0, notfirst = 0;

  189.     for (;;) {

  190.         int i, den = 1;

  191.         char buf[256];

  192.         int cmd = 0;

  193.         double d, num = 1;

  194.         int64_t intnum = 1;

  195. 

  196.         i = 0;

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

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

  199.                 cmd = *(val++);

  200.             else if (!notfirst)

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

  202.         }

  203. 

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

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

  206.         buf[i] = 0;

  207. 

  208.         {

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

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

  211.                 d = DEFAULT_NUMVAL(o_named);

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

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

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

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

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

  217.             else {

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

  219.                 if (res < 0) {

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

  221.                     return res;

  222.                 }

  223.             }

  224.         }

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

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

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

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

  229.         } else {

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

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

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

  233.         }

  234. 

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

  236.             return ret;

  237.         val += i;

  238.         if (!*val)

  239.             return 0;

  240.         notfirst = 1;

  241.     }

  242. 

  243.     return 0;

  244. }

  245. 

  246. #if FF_API_OLD_AVOPTIONS

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

  248. {

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

  250.     if (o_out)

  251.         *o_out = o;

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

  253. }

  254. #endif

  255. 

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

  257. {

  258.     int ret = 0;

  259.     void *dst, *target_obj;

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

  261.     if (!o || !target_obj)

  262.         return AVERROR_OPTION_NOT_FOUND;

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

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

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

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

  267.                  o->type != AV_OPT_TYPE_CHANNEL_LAYOUT))

  268.         return AVERROR(EINVAL);

  269. 

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

  271.     switch (o->type) {

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

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

  274.     case AV_OPT_TYPE_FLAGS:

  275.     case AV_OPT_TYPE_INT:

  276.     case AV_OPT_TYPE_INT64:

  277.     case AV_OPT_TYPE_FLOAT:

  278.     case AV_OPT_TYPE_DOUBLE:

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

  280.     case AV_OPT_TYPE_IMAGE_SIZE:

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

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

  283.             return 0;

  284.         }

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

  286.         if (ret < 0)

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

  288.         return ret;

  289.     case AV_OPT_TYPE_VIDEO_RATE:

  290.         if (!val) {

  291.             ret = AVERROR(EINVAL);

  292.         } else {

  293.             ret = av_parse_video_rate(dst, val);

  294.         }

  295.         if (ret < 0)

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

  297.         return ret;

  298.     case AV_OPT_TYPE_PIXEL_FMT:

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

  300.             ret = AV_PIX_FMT_NONE;

  301.         } else {

  302.             ret = av_get_pix_fmt(val);

  303.             if (ret == AV_PIX_FMT_NONE) {

  304.                 char *tail;

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

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

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

  308.                     return AVERROR(EINVAL);

  309.                 }

  310.             }

  311.         }

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

  313.         return 0;

  314.     case AV_OPT_TYPE_SAMPLE_FMT:

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

  316.             ret = AV_SAMPLE_FMT_NONE;

  317.         } else {

  318.             ret = av_get_sample_fmt(val);

  319.             if (ret == AV_SAMPLE_FMT_NONE) {

  320.                 char *tail;

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

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

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

  324.                     return AVERROR(EINVAL);

  325.                 }

  326.             }

  327.         }

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

  329.         return 0;

  330.     case AV_OPT_TYPE_DURATION:

  331.         if (!val) {

  332.             *(int64_t *)dst = 0;

  333.             return 0;

  334.         } else {

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

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

  337.             return ret;

  338.         }

  339.         break;

  340.     case AV_OPT_TYPE_COLOR:

  341.         if (!val) {

  342.             return 0;

  343.         } else {

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

  345.             if (ret < 0)

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

  347.             return ret;

  348.         }

  349.         break;

  350.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

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

  352.             *(int64_t *)dst = 0;

  353.         } else {

  354. #if FF_API_GET_CHANNEL_LAYOUT_COMPAT

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

  356. #else

  357.             int64_t cl = av_get_channel_layout(val);

  358. #endif

  359.             if (!cl) {

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

  361.                 ret = AVERROR(EINVAL);

  362.             }

  363.             *(int64_t *)dst = cl;

  364.             return ret;

  365.         }

  366.         break;

  367.     }

  368. 

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

  370.     return AVERROR(EINVAL);

  371. }

  372. 

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

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

  375.     {\

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

  377.             return AVERROR(EINVAL);\

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

  379.     }

  380. 

  381. OPT_EVAL_NUMBER(flags,  AV_OPT_TYPE_FLAGS,    int)

  382. OPT_EVAL_NUMBER(int,    AV_OPT_TYPE_INT,      int)

  383. OPT_EVAL_NUMBER(int64,  AV_OPT_TYPE_INT64,    int64_t)

  384. OPT_EVAL_NUMBER(float,  AV_OPT_TYPE_FLOAT,    float)

  385. OPT_EVAL_NUMBER(double, AV_OPT_TYPE_DOUBLE,   double)

  386. OPT_EVAL_NUMBER(q,      AV_OPT_TYPE_RATIONAL, AVRational)

  387. 

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

  389.                                   int search_flags)

  390. {

  391.     void *dst, *target_obj;

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

  393. 

  394.     if (!o || !target_obj)

  395.         return AVERROR_OPTION_NOT_FOUND;

  396. 

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

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

  399. }

  400. 

  401. #if FF_API_OLD_AVOPTIONS

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

  403. {

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

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

  406.         return NULL;

  407.     return o;

  408. }

  409. 

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

  411. {

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

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

  414.         return NULL;

  415.     return o;

  416. }

  417. 

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

  419. {

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

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

  422.         return NULL;

  423.     return o;

  424. }

  425. #endif

  426. 

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

  428. {

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

  430. }

  431. 

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

  433. {

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

  435. }

  436. 

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

  438. {

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

  440. }

  441. 

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

  443. {

  444.     void *target_obj;

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

  446.     uint8_t *ptr;

  447.     uint8_t **dst;

  448.     int *lendst;

  449. 

  450.     if (!o || !target_obj)

  451.         return AVERROR_OPTION_NOT_FOUND;

  452. 

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

  454.         return AVERROR(EINVAL);

  455. 

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

  457.     if (len && !ptr)

  458.         return AVERROR(ENOMEM);

  459. 

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

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

  462. 

  463.     av_free(*dst);

  464.     *dst = ptr;

  465.     *lendst = len;

  466.     if (len)

  467.         memcpy(ptr, val, len);

  468. 

  469.     return 0;

  470. }

  471. 

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

  473. {

  474.     void *target_obj;

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

  476. 

  477.     if (!o || !target_obj)

  478.         return AVERROR_OPTION_NOT_FOUND;

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

  480.         av_log(obj, AV_LOG_ERROR,

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

  482.         return AVERROR(EINVAL);

  483.     }

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

  485.         av_log(obj, AV_LOG_ERROR,

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

  487.         return AVERROR(EINVAL);

  488.     }

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

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

  491.     return 0;

  492. }

  493. 

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

  495. {

  496.     void *target_obj;

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

  498. 

  499.     if (!o || !target_obj)

  500.         return AVERROR_OPTION_NOT_FOUND;

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

  502.         av_log(obj, AV_LOG_ERROR,

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

  504.         return AVERROR(EINVAL);

  505.     }

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

  507.         return AVERROR(EINVAL);

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

  509. }

  510. 

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

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

  513. {

  514.     void *target_obj;

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

  516.                                      search_flags, &target_obj);

  517.     int min, max;

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

  519. 

  520.     if (!o || !target_obj)

  521.         return AVERROR_OPTION_NOT_FOUND;

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

  523.         av_log(obj, AV_LOG_ERROR,

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

  525.         return AVERROR(EINVAL);

  526.     }

  527. 

  528. #if LIBAVUTIL_VERSION_MAJOR < 53

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

  530.         min = -1;

  531.         max = nb_fmts-1;

  532.     } else

  533. #endif

  534.     {

  535.         min = FFMIN(o->min, -1);

  536.         max = FFMAX(o->max, nb_fmts-1);

  537.     }

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

  539.         av_log(obj, AV_LOG_ERROR,

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

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

  542.         return AVERROR(ERANGE);

  543.     }

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

  545.     return 0;

  546. }

  547. 

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

  549. {

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

  551. }

  552. 

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

  554. {

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

  556. }

  557. 

  558. int av_opt_set_channel_layout(void *obj, const char *name, int64_t cl, 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_CHANNEL_LAYOUT) {

  566.         av_log(obj, AV_LOG_ERROR,

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

  568.         return AVERROR(EINVAL);

  569.     }

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

  571.     return 0;

  572. }

  573. 

  574. #if FF_API_OLD_AVOPTIONS

  575. /**

  576.  *

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

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

  579.  */

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

  581. {

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

  583.     void *dst;

  584.     uint8_t *bin;

  585.     int len, i;

  586.     if (!o)

  587.         return NULL;

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

  589.         return NULL;

  590. 

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

  592.     if (o_out) *o_out= o;

  593. 

  594.     switch (o->type) {

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

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

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

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

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

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

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

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

  603.     case AV_OPT_TYPE_BINARY:

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

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

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

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

  608.         break;

  609.     default: return NULL;

  610.     }

  611.     return buf;

  612. }

  613. #endif

  614. 

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

  616. {

  617.     void *dst, *target_obj;

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

  619.     uint8_t *bin, buf[128];

  620.     int len, i, ret;

  621.     int64_t i64;

  622. 

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

  624.         return AVERROR_OPTION_NOT_FOUND;

  625. 

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

  627. 

  628.     buf[0] = 0;

  629.     switch (o->type) {

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

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

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

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

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

  635.     case AV_OPT_TYPE_VIDEO_RATE:

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

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

  638.     case AV_OPT_TYPE_STRING:

  639.         if (*(uint8_t**)dst)

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

  641.         else

  642.             *out_val = av_strdup("");

  643.         return 0;

  644.     case AV_OPT_TYPE_BINARY:

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

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

  647.             return AVERROR(EINVAL);

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

  649.             return AVERROR(ENOMEM);

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

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

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

  653.         return 0;

  654.     case AV_OPT_TYPE_IMAGE_SIZE:

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

  656.         break;

  657.     case AV_OPT_TYPE_PIXEL_FMT:

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

  659.         break;

  660.     case AV_OPT_TYPE_SAMPLE_FMT:

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

  662.         break;

  663.     case AV_OPT_TYPE_DURATION:

  664.         i64 = *(int64_t *)dst;

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

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

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

  668.         break;

  669.     case AV_OPT_TYPE_COLOR:

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

  671.         break;

  672.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  673.         i64 = *(int64_t *)dst;

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

  675.         break;

  676.     default:

  677.         return AVERROR(EINVAL);

  678.     }

  679. 

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

  681.         return AVERROR(EINVAL);

  682.     *out_val = av_strdup(buf);

  683.     return 0;

  684. }

  685. 

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

  687.                       int search_flags)

  688. {

  689.     void *dst, *target_obj;

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

  691.     if (!o || !target_obj)

  692.         goto error;

  693. 

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

  695. 

  696.     if (o_out) *o_out= o;

  697. 

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

  699. 

  700. error:

  701.     *den=*intnum=0;

  702.     return -1;

  703. }

  704. 

  705. #if FF_API_OLD_AVOPTIONS

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

  707. {

  708.     int64_t intnum=1;

  709.     double num=1;

  710.     int den=1;

  711. 

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

  713.         return NAN;

  714.     return num*intnum/den;

  715. }

  716. 

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

  718. {

  719.     int64_t intnum=1;

  720.     double num=1;

  721.     int den=1;

  722. 

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

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

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

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

  727.     else

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

  729. }

  730. 

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

  732. {

  733.     int64_t intnum=1;

  734.     double num=1;

  735.     int den=1;

  736. 

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

  738.         return -1;

  739.     return num*intnum/den;

  740. }

  741. #endif

  742. 

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

  744. {

  745.     int64_t intnum = 1;

  746.     double     num = 1;

  747.     int   ret, den = 1;

  748. 

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

  750.         return ret;

  751.     *out_val = num*intnum/den;

  752.     return 0;

  753. }

  754. 

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

  756. {

  757.     int64_t intnum = 1;

  758.     double     num = 1;

  759.     int   ret, den = 1;

  760. 

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

  762.         return ret;

  763.     *out_val = num*intnum/den;

  764.     return 0;

  765. }

  766. 

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

  768. {

  769.     int64_t intnum = 1;

  770.     double     num = 1;

  771.     int   ret, den = 1;

  772. 

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

  774.         return ret;

  775. 

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

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

  778.     else

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

  780.     return 0;

  781. }

  782. 

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

  784. {

  785.     void *dst, *target_obj;

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

  787.     if (!o || !target_obj)

  788.         return AVERROR_OPTION_NOT_FOUND;

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

  790.         av_log(obj, AV_LOG_ERROR,

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

  792.         return AVERROR(EINVAL);

  793.     }

  794. 

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

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

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

  798.     return 0;

  799. }

  800. 

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

  802. {

  803.     int64_t intnum = 1;

  804.     double     num = 1;

  805.     int   ret, den = 1;

  806. 

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

  808.         return ret;

  809. 

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

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

  812.     else

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

  814.     return 0;

  815. }

  816. 

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

  818.                       enum AVOptionType type, const char *desc)

  819. {

  820.     void *dst, *target_obj;

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

  822.     if (!o || !target_obj)

  823.         return AVERROR_OPTION_NOT_FOUND;

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

  825.         av_log(obj, AV_LOG_ERROR,

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

  827.         return AVERROR(EINVAL);

  828.     }

  829. 

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

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

  832.     return 0;

  833. }

  834. 

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

  836. {

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

  838. }

  839. 

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

  841. {

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

  843. }

  844. 

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

  846. {

  847.     void *dst, *target_obj;

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

  849.     if (!o || !target_obj)

  850.         return AVERROR_OPTION_NOT_FOUND;

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

  852.         av_log(obj, AV_LOG_ERROR,

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

  854.         return AVERROR(EINVAL);

  855.     }

  856. 

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

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

  859.     return 0;

  860. }

  861. 

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

  863. {

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

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

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

  867.     int64_t res;

  868. 

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

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

  871.         return 0;

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

  873. }

  874. 

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

  876. {

  877.     if      (d == INT_MAX) {

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

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

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

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

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

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

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

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

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

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

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

  889.     } else {

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

  891.     }

  892. }

  893. 

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

  895.                      int req_flags, int rej_flags)

  896. {

  897.     const AVOption *opt=NULL;

  898.     AVOptionRanges *r;

  899.     int i;

  900. 

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

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

  903.             continue;

  904. 

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

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

  907.          * Only print items from the requested unit.

  908.          */

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

  910.             continue;

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

  912.             continue;

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

  914.             continue;

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

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

  917.         else

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

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

  920.                    opt->name);

  921. 

  922.         switch (opt->type) {

  923.             case AV_OPT_TYPE_FLAGS:

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

  925.                 break;

  926.             case AV_OPT_TYPE_INT:

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

  928.                 break;

  929.             case AV_OPT_TYPE_INT64:

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

  931.                 break;

  932.             case AV_OPT_TYPE_DOUBLE:

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

  934.                 break;

  935.             case AV_OPT_TYPE_FLOAT:

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

  937.                 break;

  938.             case AV_OPT_TYPE_STRING:

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

  940.                 break;

  941.             case AV_OPT_TYPE_RATIONAL:

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

  943.                 break;

  944.             case AV_OPT_TYPE_BINARY:

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

  946.                 break;

  947.             case AV_OPT_TYPE_IMAGE_SIZE:

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

  949.                 break;

  950.             case AV_OPT_TYPE_VIDEO_RATE:

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

  952.                 break;

  953.             case AV_OPT_TYPE_PIXEL_FMT:

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

  955.                 break;

  956.             case AV_OPT_TYPE_SAMPLE_FMT:

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

  958.                 break;

  959.             case AV_OPT_TYPE_DURATION:

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

  961.                 break;

  962.             case AV_OPT_TYPE_COLOR:

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

  964.                 break;

  965.             case AV_OPT_TYPE_CHANNEL_LAYOUT:

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

  967.                 break;

  968.             case AV_OPT_TYPE_CONST:

  969.             default:

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

  971.                 break;

  972.         }

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

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

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

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

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

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

  979. 

  980.         if (opt->help)

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

  982. 

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

  984.             switch (opt->type) {

  985.             case AV_OPT_TYPE_INT:

  986.             case AV_OPT_TYPE_INT64:

  987.             case AV_OPT_TYPE_DOUBLE:

  988.             case AV_OPT_TYPE_FLOAT:

  989.             case AV_OPT_TYPE_RATIONAL:

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

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

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

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

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

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

  996.                 }

  997.                 break;

  998.             }

  999.             av_opt_freep_ranges(&r);

  1000.         }

  1001. 

  1002.         if (opt->type != AV_OPT_TYPE_CONST  &&

  1003.             opt->type != AV_OPT_TYPE_BINARY &&

  1004.                 !((opt->type == AV_OPT_TYPE_COLOR      ||

  1005.                    opt->type == AV_OPT_TYPE_IMAGE_SIZE ||

  1006.                    opt->type == AV_OPT_TYPE_STRING     ||

  1007.                    opt->type == AV_OPT_TYPE_VIDEO_RATE) &&

  1008.                   !opt->default_val.str)) {

  1009.             av_log(av_log_obj, AV_LOG_INFO, " (default ");

  1010.             switch (opt->type) {

  1011.             case AV_OPT_TYPE_FLAGS:

  1012.                 av_log(av_log_obj, AV_LOG_INFO, "%"PRIX64, opt->default_val.i64);

  1013.                 break;

  1014.             case AV_OPT_TYPE_DURATION:

  1015.             case AV_OPT_TYPE_INT:

  1016.             case AV_OPT_TYPE_INT64:

  1017.                 log_value(av_log_obj, AV_LOG_INFO, opt->default_val.i64);

  1018.                 break;

  1019.             case AV_OPT_TYPE_DOUBLE:

  1020.             case AV_OPT_TYPE_FLOAT:

  1021.                 log_value(av_log_obj, AV_LOG_INFO, opt->default_val.dbl);

  1022.                 break;

  1023.             case AV_OPT_TYPE_RATIONAL: {

  1024.                 AVRational q = av_d2q(opt->default_val.dbl, INT_MAX);

  1025.                 av_log(av_log_obj, AV_LOG_INFO, "%d/%d", q.num, q.den); }

  1026.                 break;

  1027.             case AV_OPT_TYPE_PIXEL_FMT:

  1028.                 av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(av_get_pix_fmt_name(opt->default_val.i64), "none"));

  1029.                 break;

  1030.             case AV_OPT_TYPE_SAMPLE_FMT:

  1031.                 av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(av_get_sample_fmt_name(opt->default_val.i64), "none"));

  1032.                 break;

  1033.             case AV_OPT_TYPE_COLOR:

  1034.             case AV_OPT_TYPE_IMAGE_SIZE:

  1035.             case AV_OPT_TYPE_STRING:

  1036.             case AV_OPT_TYPE_VIDEO_RATE:

  1037.                 av_log(av_log_obj, AV_LOG_INFO, "\"%s\"", opt->default_val.str);

  1038.                 break;

  1039.             case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1040.                 av_log(av_log_obj, AV_LOG_INFO, "0x%"PRIx64, opt->default_val.i64);

  1041.                 break;

  1042.             }

  1043.             av_log(av_log_obj, AV_LOG_INFO, ")");

  1044.         }

  1045. 

  1046.         av_log(av_log_obj, AV_LOG_INFO, "\n");

  1047.         if (opt->unit && opt->type != AV_OPT_TYPE_CONST) {

  1048.             opt_list(obj, av_log_obj, opt->unit, req_flags, rej_flags);

  1049.         }

  1050.     }

  1051. }

  1052. 

  1053. int av_opt_show2(void *obj, void *av_log_obj, int req_flags, int rej_flags)

  1054. {

  1055.     if (!obj)

  1056.         return -1;

  1057. 

  1058.     av_log(av_log_obj, AV_LOG_INFO, "%s AVOptions:\n", (*(AVClass**)obj)->class_name);

  1059. 

  1060.     opt_list(obj, av_log_obj, NULL, req_flags, rej_flags);

  1061. 

  1062.     return 0;

  1063. }

  1064. 

  1065. void av_opt_set_defaults(void *s)

  1066. {

  1067. #if FF_API_OLD_AVOPTIONS

  1068.     av_opt_set_defaults2(s, 0, 0);

  1069. }

  1070. 

  1071. void av_opt_set_defaults2(void *s, int mask, int flags)

  1072. {

  1073. #endif

  1074.     const AVClass *class = *(AVClass **)s;

  1075.     const AVOption *opt = NULL;

  1076.     while ((opt = av_opt_next(s, opt)) != NULL) {

  1077. #if FF_API_OLD_AVOPTIONS

  1078.         if ((opt->flags & mask) != flags)

  1079.             continue;

  1080. #endif

  1081.         switch (opt->type) {

  1082.             case AV_OPT_TYPE_CONST:

  1083.                 /* Nothing to be done here */

  1084.             break;

  1085.             case AV_OPT_TYPE_FLAGS:

  1086.             case AV_OPT_TYPE_INT:

  1087.             case AV_OPT_TYPE_INT64:

  1088.             case AV_OPT_TYPE_DURATION:

  1089.             case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1090.                 av_opt_set_int(s, opt->name, opt->default_val.i64, 0);

  1091.             break;

  1092.             case AV_OPT_TYPE_DOUBLE:

  1093.             case AV_OPT_TYPE_FLOAT: {

  1094.                 double val;

  1095.                 val = opt->default_val.dbl;

  1096.                 av_opt_set_double(s, opt->name, val, 0);

  1097.             }

  1098.             break;

  1099.             case AV_OPT_TYPE_RATIONAL: {

  1100.                 AVRational val;

  1101.                 val = av_d2q(opt->default_val.dbl, INT_MAX);

  1102.                 av_opt_set_q(s, opt->name, val, 0);

  1103.             }

  1104.             break;

  1105.             case AV_OPT_TYPE_COLOR:

  1106.             case AV_OPT_TYPE_STRING:

  1107.             case AV_OPT_TYPE_IMAGE_SIZE:

  1108.             case AV_OPT_TYPE_VIDEO_RATE:

  1109.                 av_opt_set(s, opt->name, opt->default_val.str, 0);

  1110.                 break;

  1111.             case AV_OPT_TYPE_PIXEL_FMT:

  1112. #if LIBAVUTIL_VERSION_MAJOR < 53

  1113.                 if (class->version && class->version < AV_VERSION_INT(52, 10, 100))

  1114.                     av_opt_set(s, opt->name, opt->default_val.str, 0);

  1115.                 else

  1116. #endif

  1117.                     av_opt_set_pixel_fmt(s, opt->name, opt->default_val.i64, 0);

  1118.                 break;

  1119.             case AV_OPT_TYPE_SAMPLE_FMT:

  1120. #if LIBAVUTIL_VERSION_MAJOR < 53

  1121.                 if (class->version && class->version < AV_VERSION_INT(52, 10, 100))

  1122.                     av_opt_set(s, opt->name, opt->default_val.str, 0);

  1123.                 else

  1124. #endif

  1125.                     av_opt_set_sample_fmt(s, opt->name, opt->default_val.i64, 0);

  1126.                 break;

  1127.             case AV_OPT_TYPE_BINARY:

  1128.                 /* Cannot set default for binary */

  1129.             break;

  1130.             default:

  1131.                 av_log(s, AV_LOG_DEBUG, "AVOption type %d of option %s not implemented yet\n", opt->type, opt->name);

  1132.         }

  1133.     }

  1134. }

  1135. 

  1136. /**

  1137.  * Store the value in the field in ctx that is named like key.

  1138.  * ctx must be an AVClass context, storing is done using AVOptions.

  1139.  *

  1140.  * @param buf the string to parse, buf will be updated to point at the

  1141.  * separator just after the parsed key/value pair

  1142.  * @param key_val_sep a 0-terminated list of characters used to

  1143.  * separate key from value

  1144.  * @param pairs_sep a 0-terminated list of characters used to separate

  1145.  * two pairs from each other

  1146.  * @return 0 if the key/value pair has been successfully parsed and

  1147.  * set, or a negative value corresponding to an AVERROR code in case

  1148.  * of error:

  1149.  * AVERROR(EINVAL) if the key/value pair cannot be parsed,

  1150.  * the error code issued by av_opt_set() if the key/value pair

  1151.  * cannot be set

  1152.  */

  1153. static int parse_key_value_pair(void *ctx, const char **buf,

  1154.                                 const char *key_val_sep, const char *pairs_sep)

  1155. {

  1156.     char *key = av_get_token(buf, key_val_sep);

  1157.     char *val;

  1158.     int ret;

  1159. 

  1160.     if (!key)

  1161.         return AVERROR(ENOMEM);

  1162. 

  1163.     if (*key && strspn(*buf, key_val_sep)) {

  1164.         (*buf)++;

  1165.         val = av_get_token(buf, pairs_sep);

  1166.         if (!val) {

  1167.             av_freep(&key);

  1168.             return AVERROR(ENOMEM);

  1169.         }

  1170.     } else {

  1171.         av_log(ctx, AV_LOG_ERROR, "Missing key or no key/value separator found after key '%s'\n", key);

  1172.         av_free(key);

  1173.         return AVERROR(EINVAL);

  1174.     }

  1175. 

  1176.     av_log(ctx, AV_LOG_DEBUG, "Setting entry with key '%s' to value '%s'\n", key, val);

  1177. 

  1178.     ret = av_opt_set(ctx, key, val, AV_OPT_SEARCH_CHILDREN);

  1179.     if (ret == AVERROR_OPTION_NOT_FOUND)

  1180.         av_log(ctx, AV_LOG_ERROR, "Key '%s' not found.\n", key);

  1181. 

  1182.     av_free(key);

  1183.     av_free(val);

  1184.     return ret;

  1185. }

  1186. 

  1187. int av_set_options_string(void *ctx, const char *opts,

  1188.                           const char *key_val_sep, const char *pairs_sep)

  1189. {

  1190.     int ret, count = 0;

  1191. 

  1192.     if (!opts)

  1193.         return 0;

  1194. 

  1195.     while (*opts) {

  1196.         if ((ret = parse_key_value_pair(ctx, &opts, key_val_sep, pairs_sep)) < 0)

  1197.             return ret;

  1198.         count++;

  1199. 

  1200.         if (*opts)

  1201.             opts++;

  1202.     }

  1203. 

  1204.     return count;

  1205. }

  1206. 

  1207. #define WHITESPACES " \n\t"

  1208. 

  1209. static int is_key_char(char c)

  1210. {

  1211.     return (unsigned)((c | 32) - 'a') < 26 ||

  1212.            (unsigned)(c - '0') < 10 ||

  1213.            c == '-' || c == '_' || c == '/' || c == '.';

  1214. }

  1215. 

  1216. /**

  1217.  * Read a key from a string.

  1218.  *

  1219.  * The key consists of is_key_char characters and must be terminated by a

  1220.  * character from the delim string; spaces are ignored.

  1221.  *

  1222.  * @return  0 for success (even with ellipsis), <0 for failure

  1223.  */

  1224. static int get_key(const char **ropts, const char *delim, char **rkey)

  1225. {

  1226.     const char *opts = *ropts;

  1227.     const char *key_start, *key_end;

  1228. 

  1229.     key_start = opts += strspn(opts, WHITESPACES);

  1230.     while (is_key_char(*opts))

  1231.         opts++;

  1232.     key_end = opts;

  1233.     opts += strspn(opts, WHITESPACES);

  1234.     if (!*opts || !strchr(delim, *opts))

  1235.         return AVERROR(EINVAL);

  1236.     opts++;

  1237.     if (!(*rkey = av_malloc(key_end - key_start + 1)))

  1238.         return AVERROR(ENOMEM);

  1239.     memcpy(*rkey, key_start, key_end - key_start);

  1240.     (*rkey)[key_end - key_start] = 0;

  1241.     *ropts = opts;

  1242.     return 0;

  1243. }

  1244. 

  1245. int av_opt_get_key_value(const char **ropts,

  1246.                          const char *key_val_sep, const char *pairs_sep,

  1247.                          unsigned flags,

  1248.                          char **rkey, char **rval)

  1249. {

  1250.     int ret;

  1251.     char *key = NULL, *val;

  1252.     const char *opts = *ropts;

  1253. 

  1254.     if ((ret = get_key(&opts, key_val_sep, &key)) < 0 &&

  1255.         !(flags & AV_OPT_FLAG_IMPLICIT_KEY))

  1256.         return AVERROR(EINVAL);

  1257.     if (!(val = av_get_token(&opts, pairs_sep))) {

  1258.         av_free(key);

  1259.         return AVERROR(ENOMEM);

  1260.     }

  1261.     *ropts = opts;

  1262.     *rkey  = key;

  1263.     *rval  = val;

  1264.     return 0;

  1265. }

  1266. 

  1267. int av_opt_set_from_string(void *ctx, const char *opts,

  1268.                            const char *const *shorthand,

  1269.                            const char *key_val_sep, const char *pairs_sep)

  1270. {

  1271.     int ret, count = 0;

  1272.     const char *dummy_shorthand = NULL;

  1273.     char *av_uninit(parsed_key), *av_uninit(value);

  1274.     const char *key;

  1275. 

  1276.     if (!opts)

  1277.         return 0;

  1278.     if (!shorthand)

  1279.         shorthand = &dummy_shorthand;

  1280. 

  1281.     while (*opts) {

  1282.         ret = av_opt_get_key_value(&opts, key_val_sep, pairs_sep,

  1283.                                    *shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,

  1284.                                    &parsed_key, &value);

  1285.         if (ret < 0) {

  1286.             if (ret == AVERROR(EINVAL))

  1287.                 av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", opts);

  1288.             else

  1289.                 av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", opts,

  1290.                        av_err2str(ret));

  1291.             return ret;

  1292.         }

  1293.         if (*opts)

  1294.             opts++;

  1295.         if (parsed_key) {

  1296.             key = parsed_key;

  1297.             while (*shorthand) /* discard all remaining shorthand */

  1298.                 shorthand++;

  1299.         } else {

  1300.             key = *(shorthand++);

  1301.         }

  1302. 

  1303.         av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);

  1304.         if ((ret = av_opt_set(ctx, key, value, 0)) < 0) {

  1305.             if (ret == AVERROR_OPTION_NOT_FOUND)

  1306.                 av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);

  1307.             av_free(value);

  1308.             av_free(parsed_key);

  1309.             return ret;

  1310.         }

  1311. 

  1312.         av_free(value);

  1313.         av_free(parsed_key);

  1314.         count++;

  1315.     }

  1316.     return count;

  1317. }

  1318. 

  1319. void av_opt_free(void *obj)

  1320. {

  1321.     const AVOption *o = NULL;

  1322.     while ((o = av_opt_next(obj, o)))

  1323.         if (o->type == AV_OPT_TYPE_STRING || o->type == AV_OPT_TYPE_BINARY)

  1324.             av_freep((uint8_t *)obj + o->offset);

  1325. }

  1326. 

  1327. int av_opt_set_dict(void *obj, AVDictionary **options)

  1328. {

  1329.     AVDictionaryEntry *t = NULL;

  1330.     AVDictionary    *tmp = NULL;

  1331.     int ret = 0;

  1332. 

  1333.     while ((t = av_dict_get(*options, "", t, AV_DICT_IGNORE_SUFFIX))) {

  1334.         ret = av_opt_set(obj, t->key, t->value, 0);

  1335.         if (ret == AVERROR_OPTION_NOT_FOUND)

  1336.             av_dict_set(&tmp, t->key, t->value, 0);

  1337.         else if (ret < 0) {

  1338.             av_log(obj, AV_LOG_ERROR, "Error setting option %s to value %s.\n", t->key, t->value);

  1339.             break;

  1340.         }

  1341.         ret = 0;

  1342.     }

  1343.     av_dict_free(options);

  1344.     *options = tmp;

  1345.     return ret;

  1346. }

  1347. 

  1348. const AVOption *av_opt_find(void *obj, const char *name, const char *unit,

  1349.                             int opt_flags, int search_flags)

  1350. {

  1351.     return av_opt_find2(obj, name, unit, opt_flags, search_flags, NULL);

  1352. }

  1353. 

  1354. const AVOption *av_opt_find2(void *obj, const char *name, const char *unit,

  1355.                              int opt_flags, int search_flags, void **target_obj)

  1356. {

  1357.     const AVClass  *c;

  1358.     const AVOption *o = NULL;

  1359. 

  1360.     if(!obj)

  1361.         return NULL;

  1362. 

  1363.     c= *(AVClass**)obj;

  1364. 

  1365.     if (!c)

  1366.         return NULL;

  1367. 

  1368.     if (search_flags & AV_OPT_SEARCH_CHILDREN) {

  1369.         if (search_flags & AV_OPT_SEARCH_FAKE_OBJ) {

  1370.             const AVClass *child = NULL;

  1371.             while (child = av_opt_child_class_next(c, child))

  1372.                 if (o = av_opt_find2(&child, name, unit, opt_flags, search_flags, NULL))

  1373.                     return o;

  1374.         } else {

  1375.             void *child = NULL;

  1376.             while (child = av_opt_child_next(obj, child))

  1377.                 if (o = av_opt_find2(child, name, unit, opt_flags, search_flags, target_obj))

  1378.                     return o;

  1379.         }

  1380.     }

  1381. 

  1382.     while (o = av_opt_next(obj, o)) {

  1383.         if (!strcmp(o->name, name) && (o->flags & opt_flags) == opt_flags &&

  1384.             ((!unit && o->type != AV_OPT_TYPE_CONST) ||

  1385.              (unit  && o->type == AV_OPT_TYPE_CONST && o->unit && !strcmp(o->unit, unit)))) {

  1386.             if (target_obj) {

  1387.                 if (!(search_flags & AV_OPT_SEARCH_FAKE_OBJ))

  1388.                     *target_obj = obj;

  1389.                 else

  1390.                     *target_obj = NULL;

  1391.             }

  1392.             return o;

  1393.         }

  1394.     }

  1395.     return NULL;

  1396. }

  1397. 

  1398. void *av_opt_child_next(void *obj, void *prev)

  1399. {

  1400.     const AVClass *c = *(AVClass**)obj;

  1401.     if (c->child_next)

  1402.         return c->child_next(obj, prev);

  1403.     return NULL;

  1404. }

  1405. 

  1406. const AVClass *av_opt_child_class_next(const AVClass *parent, const AVClass *prev)

  1407. {

  1408.     if (parent->child_class_next)

  1409.         return parent->child_class_next(prev);

  1410.     return NULL;

  1411. }

  1412. 

  1413. void *av_opt_ptr(const AVClass *class, void *obj, const char *name)

  1414. {

  1415.     const AVOption *opt= av_opt_find2(&class, name, NULL, 0, AV_OPT_SEARCH_FAKE_OBJ, NULL);

  1416.     if(!opt)

  1417.         return NULL;

  1418.     return (uint8_t*)obj + opt->offset;

  1419. }

  1420. 

  1421. int av_opt_query_ranges(AVOptionRanges **ranges_arg, void *obj, const char *key, int flags)

  1422. {

  1423.     const AVClass *c = *(AVClass**)obj;

  1424.     int (*callback)(AVOptionRanges **, void *obj, const char *key, int flags) = NULL;

  1425. 

  1426.     if (c->version > (52 << 16 | 11 << 8))

  1427.         callback = c->query_ranges;

  1428. 

  1429.     if (!callback)

  1430.         callback = av_opt_query_ranges_default;

  1431. 

  1432.     return callback(ranges_arg, obj, key, flags);

  1433. }

  1434. 

  1435. int av_opt_query_ranges_default(AVOptionRanges **ranges_arg, void *obj, const char *key, int flags)

  1436. {

  1437.     AVOptionRanges *ranges = av_mallocz(sizeof(*ranges));

  1438.     AVOptionRange **range_array = av_mallocz(sizeof(void*));

  1439.     AVOptionRange *range = av_mallocz(sizeof(*range));

  1440.     const AVOption *field = av_opt_find(obj, key, NULL, 0, flags);

  1441.     int ret;

  1442. 

  1443.     *ranges_arg = NULL;

  1444. 

  1445.     if (!ranges || !range || !range_array || !field) {

  1446.         ret = AVERROR(ENOMEM);

  1447.         goto fail;

  1448.     }

  1449. 

  1450.     ranges->range = range_array;

  1451.     ranges->range[0] = range;

  1452.     ranges->nb_ranges = 1;

  1453.     range->is_range = 1;

  1454.     range->value_min = field->min;

  1455.     range->value_max = field->max;

  1456. 

  1457.     switch (field->type) {

  1458.     case AV_OPT_TYPE_INT:

  1459.     case AV_OPT_TYPE_INT64:

  1460.     case AV_OPT_TYPE_PIXEL_FMT:

  1461.     case AV_OPT_TYPE_SAMPLE_FMT:

  1462.     case AV_OPT_TYPE_FLOAT:

  1463.     case AV_OPT_TYPE_DOUBLE:

  1464.     case AV_OPT_TYPE_DURATION:

  1465.     case AV_OPT_TYPE_COLOR:

  1466.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1467.         break;

  1468.     case AV_OPT_TYPE_STRING:

  1469.         range->component_min = 0;

  1470.         range->component_max = 0x10FFFF; // max unicode value

  1471.         range->value_min = -1;

  1472.         range->value_max = INT_MAX;

  1473.         break;

  1474.     case AV_OPT_TYPE_RATIONAL:

  1475.         range->component_min = INT_MIN;

  1476.         range->component_max = INT_MAX;

  1477.         break;

  1478.     case AV_OPT_TYPE_IMAGE_SIZE:

  1479.         range->component_min = 0;

  1480.         range->component_max = INT_MAX/128/8;

  1481.         range->value_min = 0;

  1482.         range->value_max = INT_MAX/8;

  1483.         break;

  1484.     case AV_OPT_TYPE_VIDEO_RATE:

  1485.         range->component_min = 1;

  1486.         range->component_max = INT_MAX;

  1487.         range->value_min = 1;

  1488.         range->value_max = INT_MAX;

  1489.         break;

  1490.     default:

  1491.         ret = AVERROR(ENOSYS);

  1492.         goto fail;

  1493.     }

  1494. 

  1495.     *ranges_arg = ranges;

  1496.     return 0;

  1497. fail:

  1498.     av_free(ranges);

  1499.     av_free(range);

  1500.     av_free(range_array);

  1501.     return ret;

  1502. }

  1503. 

  1504. void av_opt_freep_ranges(AVOptionRanges **rangesp)

  1505. {

  1506.     int i;

  1507.     AVOptionRanges *ranges = *rangesp;

  1508. 

  1509.     for (i = 0; i < ranges->nb_ranges; i++) {

  1510.         AVOptionRange *range = ranges->range[i];

  1511.         av_freep(&range->str);

  1512.         av_freep(&ranges->range[i]);

  1513.     }

  1514.     av_freep(&ranges->range);

  1515.     av_freep(rangesp);

  1516. }

  1517. 

  1518. #ifdef TEST

  1519. 

  1520. typedef struct TestContext

  1521. {

  1522.     const AVClass *class;

  1523.     int num;

  1524.     int toggle;

  1525.     char *string;

  1526.     int flags;

  1527.     AVRational rational;

  1528.     AVRational video_rate;

  1529.     int w, h;

  1530.     enum AVPixelFormat pix_fmt;

  1531.     enum AVSampleFormat sample_fmt;

  1532.     int64_t duration;

  1533.     uint8_t color[4];

  1534.     int64_t channel_layout;

  1535. } TestContext;

  1536. 

  1537. #define OFFSET(x) offsetof(TestContext, x)

  1538. 

  1539. #define TEST_FLAG_COOL 01

  1540. #define TEST_FLAG_LAME 02

  1541. #define TEST_FLAG_MU   04

  1542. 

  1543. static const AVOption test_options[]= {

  1544. {"num",      "set num",        OFFSET(num),      AV_OPT_TYPE_INT,      {.i64 = 0},       0,        100                 },

  1545. {"toggle",   "set toggle",     OFFSET(toggle),   AV_OPT_TYPE_INT,      {.i64 = 0},       0,        1                   },

  1546. {"rational", "set rational",   OFFSET(rational), AV_OPT_TYPE_RATIONAL, {.dbl = 0},       0,        10                  },

  1547. {"string",   "set string",     OFFSET(string),   AV_OPT_TYPE_STRING,   {.str = "default"}, CHAR_MIN, CHAR_MAX          },

  1548. {"flags",    "set flags",      OFFSET(flags),    AV_OPT_TYPE_FLAGS,    {.i64 = 0},       0,        INT_MAX, 0, "flags" },

  1549. {"cool",     "set cool flag ", 0,                AV_OPT_TYPE_CONST,    {.i64 = TEST_FLAG_COOL}, INT_MIN,  INT_MAX, 0, "flags" },

  1550. {"lame",     "set lame flag ", 0,                AV_OPT_TYPE_CONST,    {.i64 = TEST_FLAG_LAME}, INT_MIN,  INT_MAX, 0, "flags" },

  1551. {"mu",       "set mu flag ",   0,                AV_OPT_TYPE_CONST,    {.i64 = TEST_FLAG_MU},   INT_MIN,  INT_MAX, 0, "flags" },

  1552. {"size",     "set size",       OFFSET(w),        AV_OPT_TYPE_IMAGE_SIZE,{0},             0,        0                   },

  1553. {"pix_fmt",  "set pixfmt",     OFFSET(pix_fmt),  AV_OPT_TYPE_PIXEL_FMT, {.i64 = AV_PIX_FMT_NONE}, -1, AV_PIX_FMT_NB-1},

  1554. {"sample_fmt", "set samplefmt", OFFSET(sample_fmt), AV_OPT_TYPE_SAMPLE_FMT, {.i64 = AV_SAMPLE_FMT_NONE}, -1, AV_SAMPLE_FMT_NB-1},

  1555. {"video_rate", "set videorate", OFFSET(video_rate), AV_OPT_TYPE_VIDEO_RATE,  {.str = "25"}, 0,     0                   },

  1556. {"duration", "set duration",   OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, INT64_MAX},

  1557. {"color", "set color",   OFFSET(color), AV_OPT_TYPE_COLOR, {.str = "pink"}, 0, 0},

  1558. {"cl", "set channel layout", OFFSET(channel_layout), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64 = AV_CH_LAYOUT_HEXAGONAL}, 0, INT64_MAX},

  1559. {NULL},

  1560. };

  1561. 

  1562. static const char *test_get_name(void *ctx)

  1563. {

  1564.     return "test";

  1565. }

  1566. 

  1567. static const AVClass test_class = {

  1568.     "TestContext",

  1569.     test_get_name,

  1570.     test_options

  1571. };

  1572. 

  1573. int main(void)

  1574. {

  1575.     int i;

  1576. 

  1577.     printf("\nTesting av_set_options_string()\n");

  1578.     {

  1579.         TestContext test_ctx = { 0 };

  1580.         static const char * const options[] = {

  1581.             "",

  1582.             ":",

  1583.             "=",

  1584.             "foo=:",

  1585.             ":=foo",

  1586.             "=foo",

  1587.             "foo=",

  1588.             "foo",

  1589.             "foo=val",

  1590.             "foo==val",

  1591.             "toggle=:",

  1592.             "string=:",

  1593.             "toggle=1 : foo",

  1594.             "toggle=100",

  1595.             "toggle==1",

  1596.             "flags=+mu-lame : num=42: toggle=0",

  1597.             "num=42 : string=blahblah",

  1598.             "rational=0 : rational=1/2 : rational=1/-1",

  1599.             "rational=-1/0",

  1600.             "size=1024x768",

  1601.             "size=pal",

  1602.             "size=bogus",

  1603.             "pix_fmt=yuv420p",

  1604.             "pix_fmt=2",

  1605.             "pix_fmt=bogus",

  1606.             "sample_fmt=s16",

  1607.             "sample_fmt=2",

  1608.             "sample_fmt=bogus",

  1609.             "video_rate=pal",

  1610.             "video_rate=25",

  1611.             "video_rate=30000/1001",

  1612.             "video_rate=30/1.001",

  1613.             "video_rate=bogus",

  1614.             "duration=bogus",

  1615.             "duration=123.45",

  1616.             "duration=1\\:23\\:45.67",

  1617.             "color=blue",

  1618.             "color=0x223300",

  1619.             "color=0x42FF07AA",

  1620.             "cl=stereo+downmix",

  1621.             "cl=foo",

  1622.         };

  1623. 

  1624.         test_ctx.class = &test_class;

  1625.         av_opt_set_defaults(&test_ctx);

  1626. 

  1627.         av_log_set_level(AV_LOG_DEBUG);

  1628. 

  1629.         for (i=0; i < FF_ARRAY_ELEMS(options); i++) {

  1630.             av_log(&test_ctx, AV_LOG_DEBUG, "Setting options string '%s'\n", options[i]);

  1631.             if (av_set_options_string(&test_ctx, options[i], "=", ":") < 0)

  1632.                 av_log(&test_ctx, AV_LOG_ERROR, "Error setting options string: '%s'\n", options[i]);

  1633.             printf("\n");

  1634.         }

  1635.         av_opt_free(&test_ctx);

  1636.     }

  1637. 

  1638.     printf("\nTesting av_opt_set_from_string()\n");

  1639.     {

  1640.         TestContext test_ctx = { 0 };

  1641.         static const char * const options[] = {

  1642.             "",

  1643.             "5",

  1644.             "5:hello",

  1645.             "5:hello:size=pal",

  1646.             "5:size=pal:hello",

  1647.             ":",

  1648.             "=",

  1649.             " 5 : hello : size = pal ",

  1650.             "a_very_long_option_name_that_will_need_to_be_ellipsized_around_here=42"

  1651.         };

  1652.         static const char * const shorthand[] = { "num", "string", NULL };

  1653. 

  1654.         test_ctx.class = &test_class;

  1655.         av_opt_set_defaults(&test_ctx);

  1656. 

  1657.         av_log_set_level(AV_LOG_DEBUG);

  1658. 

  1659.         for (i=0; i < FF_ARRAY_ELEMS(options); i++) {

  1660.             av_log(&test_ctx, AV_LOG_DEBUG, "Setting options string '%s'\n", options[i]);

  1661.             if (av_opt_set_from_string(&test_ctx, options[i], shorthand, "=", ":") < 0)

  1662.                 av_log(&test_ctx, AV_LOG_ERROR, "Error setting options string: '%s'\n", options[i]);

  1663.             printf("\n");

  1664.         }

  1665.         av_opt_free(&test_ctx);

  1666.     }

  1667. 

  1668.     return 0;

  1669. }

  1670. 

  1671. #endif