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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 int hexchar2int(char c) {

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

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

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

  136.     return -1;

  137. }

  138. 

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

  140. {

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

  142.     uint8_t *bin, *ptr;

  143.     int len = strlen(val);

  144. 

  145.     av_freep(dst);

  146.     *lendst = 0;

  147. 

  148.     if (len & 1)

  149.         return AVERROR(EINVAL);

  150.     len /= 2;

  151. 

  152.     ptr = bin = av_malloc(len);

  153.     while (*val) {

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

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

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

  157.             av_free(bin);

  158.             return AVERROR(EINVAL);

  159.         }

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

  161.     }

  162.     *dst = bin;

  163.     *lendst = len;

  164. 

  165.     return 0;

  166. }

  167. 

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

  169. {

  170.     av_freep(dst);

  171.     *dst = av_strdup(val);

  172.     return 0;

  173. }

  174. 

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

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

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

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

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

  180. 

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

  182. {

  183.     int ret = 0;

  184.     int num, den;

  185.     char c;

  186. 

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

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

  189.             return ret;

  190.         ret = 0;

  191.     }

  192. 

  193.     for (;;) {

  194.         int i = 0;

  195.         char buf[256];

  196.         int cmd = 0;

  197.         double d;

  198.         int64_t intnum = 1;

  199. 

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

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

  202.                 cmd = *(val++);

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

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

  205.             buf[i] = 0;

  206.         }

  207. 

  208.         {

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

  210.             int res;

  211.             int ci = 0;

  212.             double const_values[64];

  213.             const char * const_names[64];

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

  215.                 d = DEFAULT_NUMVAL(o_named);

  216.             else {

  217.                 if (o->unit) {

  218.                     for (o_named = NULL; o_named = av_opt_next(target_obj, o_named); ) {

  219.                         if (o_named->type == AV_OPT_TYPE_CONST &&

  220.                             o_named->unit &&

  221.                             !strcmp(o_named->unit, o->unit)) {

  222.                             if (ci + 6 >= FF_ARRAY_ELEMS(const_values)) {

  223.                                 av_log(obj, AV_LOG_ERROR, "const_values array too small for %s\n", o->unit);

  224.                                 return AVERROR_PATCHWELCOME;

  225.                             }

  226.                             const_names [ci  ] = o_named->name;

  227.                             const_values[ci++] = DEFAULT_NUMVAL(o_named);

  228.                         }

  229.                     }

  230.                 }

  231.                 const_names [ci  ] = "default";

  232.                 const_values[ci++] = DEFAULT_NUMVAL(o);

  233.                 const_names [ci  ] = "max";

  234.                 const_values[ci++] = o->max;

  235.                 const_names [ci  ] = "min";

  236.                 const_values[ci++] = o->min;

  237.                 const_names [ci  ] = "none";

  238.                 const_values[ci++] = 0;

  239.                 const_names [ci  ] = "all";

  240.                 const_values[ci++] = ~0;

  241.                 const_names [ci] = NULL;

  242.                 const_values[ci] = 0;

  243. 

  244.                 res = av_expr_parse_and_eval(&d, i ? buf : val, const_names,

  245.                                             const_values, NULL, NULL, NULL, NULL, NULL, 0, obj);

  246.                 if (res < 0) {

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

  248.                     return res;

  249.                 }

  250.             }

  251.         }

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

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

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

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

  256.         }

  257. 

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

  259.             return ret;

  260.         val += i;

  261.         if (!i || !*val)

  262.             return 0;

  263.     }

  264. 

  265.     return 0;

  266. }

  267. 

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

  269. {

  270.     int ret;

  271. 

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

  273.         dst[0] =

  274.         dst[1] = 0;

  275.         return 0;

  276.     }

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

  278.     if (ret < 0)

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

  280.     return ret;

  281. }

  282. 

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

  284. {

  285.     int ret;

  286.     if (!val) {

  287.         ret = AVERROR(EINVAL);

  288.     } else {

  289.         ret = av_parse_video_rate(dst, val);

  290.     }

  291.     if (ret < 0)

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

  293.     return ret;

  294. }

  295. 

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

  297. {

  298.     int ret;

  299. 

  300.     if (!val) {

  301.         return 0;

  302.     } else {

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

  304.         if (ret < 0)

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

  306.         return ret;

  307.     }

  308.     return 0;

  309. }

  310. 

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

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

  313. {

  314.     int fmt, min, max;

  315. 

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

  317.         fmt = -1;

  318.     } else {

  319.         fmt = get_fmt(val);

  320.         if (fmt == -1) {

  321.             char *tail;

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

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

  324.                 av_log(obj, AV_LOG_ERROR,

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

  326.                 return AVERROR(EINVAL);

  327.             }

  328.         }

  329.     }

  330. 

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

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

  333. 

  334.     // hack for compatibility with old ffmpeg

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

  336.         min = -1;

  337.         max = fmt_nb-1;

  338.     }

  339. 

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

  341.         av_log(obj, AV_LOG_ERROR,

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

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

  344.         return AVERROR(ERANGE);

  345.     }

  346. 

  347.     *(int *)dst = fmt;

  348.     return 0;

  349. }

  350. 

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

  352. {

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

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

  355. }

  356. 

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

  358. {

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

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

  361. }

  362. 

  363. #if FF_API_OLD_AVOPTIONS

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

  365. {

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

  367.     if (o_out)

  368.         *o_out = o;

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

  370. }

  371. #endif

  372. 

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

  374. {

  375.     int ret = 0;

  376.     void *dst, *target_obj;

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

  378.     if (!o || !target_obj)

  379.         return AVERROR_OPTION_NOT_FOUND;

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

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

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

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

  384.                  o->type != AV_OPT_TYPE_CHANNEL_LAYOUT))

  385.         return AVERROR(EINVAL);

  386. 

  387.     if (o->flags & AV_OPT_FLAG_READONLY)

  388.         return AVERROR(EINVAL);

  389. 

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

  391.     switch (o->type) {

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

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

  394.     case AV_OPT_TYPE_FLAGS:

  395.     case AV_OPT_TYPE_INT:

  396.     case AV_OPT_TYPE_INT64:

  397.     case AV_OPT_TYPE_FLOAT:

  398.     case AV_OPT_TYPE_DOUBLE:

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

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

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

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

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

  404.     case AV_OPT_TYPE_DURATION:

  405.         if (!val) {

  406.             *(int64_t *)dst = 0;

  407.             return 0;

  408.         } else {

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

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

  411.             return ret;

  412.         }

  413.         break;

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

  415.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

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

  417.             *(int64_t *)dst = 0;

  418.         } else {

  419. #if FF_API_GET_CHANNEL_LAYOUT_COMPAT

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

  421. #else

  422.             int64_t cl = av_get_channel_layout(val);

  423. #endif

  424.             if (!cl) {

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

  426.                 ret = AVERROR(EINVAL);

  427.             }

  428.             *(int64_t *)dst = cl;

  429.             return ret;

  430.         }

  431.         break;

  432.     }

  433. 

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

  435.     return AVERROR(EINVAL);

  436. }

  437. 

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

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

  440.     {\

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

  442.             return AVERROR(EINVAL);\

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

  444.     }

  445. 

  446. OPT_EVAL_NUMBER(flags,  AV_OPT_TYPE_FLAGS,    int)

  447. OPT_EVAL_NUMBER(int,    AV_OPT_TYPE_INT,      int)

  448. OPT_EVAL_NUMBER(int64,  AV_OPT_TYPE_INT64,    int64_t)

  449. OPT_EVAL_NUMBER(float,  AV_OPT_TYPE_FLOAT,    float)

  450. OPT_EVAL_NUMBER(double, AV_OPT_TYPE_DOUBLE,   double)

  451. OPT_EVAL_NUMBER(q,      AV_OPT_TYPE_RATIONAL, AVRational)

  452. 

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

  454.                                   int search_flags)

  455. {

  456.     void *dst, *target_obj;

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

  458. 

  459.     if (!o || !target_obj)

  460.         return AVERROR_OPTION_NOT_FOUND;

  461. 

  462.     if (o->flags & AV_OPT_FLAG_READONLY)

  463.         return AVERROR(EINVAL);

  464. 

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

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

  467. }

  468. 

  469. #if FF_API_OLD_AVOPTIONS

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

  471. {

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

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

  474.         return NULL;

  475.     return o;

  476. }

  477. 

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

  479. {

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

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

  482.         return NULL;

  483.     return o;

  484. }

  485. 

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

  487. {

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

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

  490.         return NULL;

  491.     return o;

  492. }

  493. #endif

  494. 

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

  496. {

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

  498. }

  499. 

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

  501. {

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

  503. }

  504. 

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

  506. {

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

  508. }

  509. 

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

  511. {

  512.     void *target_obj;

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

  514.     uint8_t *ptr;

  515.     uint8_t **dst;

  516.     int *lendst;

  517. 

  518.     if (!o || !target_obj)

  519.         return AVERROR_OPTION_NOT_FOUND;

  520. 

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

  522.         return AVERROR(EINVAL);

  523. 

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

  525.     if (len && !ptr)

  526.         return AVERROR(ENOMEM);

  527. 

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

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

  530. 

  531.     av_free(*dst);

  532.     *dst = ptr;

  533.     *lendst = len;

  534.     if (len)

  535.         memcpy(ptr, val, len);

  536. 

  537.     return 0;

  538. }

  539. 

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

  541. {

  542.     void *target_obj;

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

  544. 

  545.     if (!o || !target_obj)

  546.         return AVERROR_OPTION_NOT_FOUND;

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

  548.         av_log(obj, AV_LOG_ERROR,

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

  550.         return AVERROR(EINVAL);

  551.     }

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

  553.         av_log(obj, AV_LOG_ERROR,

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

  555.         return AVERROR(EINVAL);

  556.     }

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

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

  559.     return 0;

  560. }

  561. 

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

  563. {

  564.     void *target_obj;

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

  566. 

  567.     if (!o || !target_obj)

  568.         return AVERROR_OPTION_NOT_FOUND;

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

  570.         av_log(obj, AV_LOG_ERROR,

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

  572.         return AVERROR(EINVAL);

  573.     }

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

  575.         return AVERROR(EINVAL);

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

  577. }

  578. 

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

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

  581. {

  582.     void *target_obj;

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

  584.                                      search_flags, &target_obj);

  585.     int min, max;

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

  587. 

  588.     if (!o || !target_obj)

  589.         return AVERROR_OPTION_NOT_FOUND;

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

  591.         av_log(obj, AV_LOG_ERROR,

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

  593.         return AVERROR(EINVAL);

  594.     }

  595. 

  596. #if LIBAVUTIL_VERSION_MAJOR < 54

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

  598.         min = -1;

  599.         max = nb_fmts-1;

  600.     } else

  601. #endif

  602.     {

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

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

  605.     }

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

  607.         av_log(obj, AV_LOG_ERROR,

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

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

  610.         return AVERROR(ERANGE);

  611.     }

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

  613.     return 0;

  614. }

  615. 

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

  617. {

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

  619. }

  620. 

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

  622. {

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

  624. }

  625. 

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

  627. {

  628.     void *target_obj;

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

  630. 

  631.     if (!o || !target_obj)

  632.         return AVERROR_OPTION_NOT_FOUND;

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

  634.         av_log(obj, AV_LOG_ERROR,

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

  636.         return AVERROR(EINVAL);

  637.     }

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

  639.     return 0;

  640. }

  641. 

  642. #if FF_API_OLD_AVOPTIONS

  643. /**

  644.  *

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

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

  647.  */

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

  649. {

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

  651.     void *dst;

  652.     uint8_t *bin;

  653.     int len, i;

  654.     if (!o)

  655.         return NULL;

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

  657.         return NULL;

  658. 

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

  660.     if (o_out) *o_out= o;

  661. 

  662.     switch (o->type) {

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

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

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

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

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

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

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

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

  671.     case AV_OPT_TYPE_BINARY:

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

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

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

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

  676.         break;

  677.     default: return NULL;

  678.     }

  679.     return buf;

  680. }

  681. #endif

  682. 

  683. int av_opt_set_dict_val(void *obj, const char *name, const AVDictionary *val, int search_flags)

  684. {

  685.     void *target_obj;

  686.     AVDictionary **dst;

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

  688. 

  689.     if (!o || !target_obj)

  690.         return AVERROR_OPTION_NOT_FOUND;

  691.     if (o->flags & AV_OPT_FLAG_READONLY)

  692.         return AVERROR(EINVAL);

  693. 

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

  695.     av_dict_free(dst);

  696.     av_dict_copy(dst, val, 0);

  697. 

  698.     return 0;

  699. }

  700. 

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

  702. {

  703.     void *dst, *target_obj;

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

  705.     uint8_t *bin, buf[128];

  706.     int len, i, ret;

  707.     int64_t i64;

  708. 

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

  710.         return AVERROR_OPTION_NOT_FOUND;

  711. 

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

  713. 

  714.     buf[0] = 0;

  715.     switch (o->type) {

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

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

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

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

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

  721.     case AV_OPT_TYPE_VIDEO_RATE:

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

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

  724.     case AV_OPT_TYPE_STRING:

  725.         if (*(uint8_t**)dst)

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

  727.         else

  728.             *out_val = av_strdup("");

  729.         return 0;

  730.     case AV_OPT_TYPE_BINARY:

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

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

  733.             return AVERROR(EINVAL);

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

  735.             return AVERROR(ENOMEM);

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

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

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

  739.         return 0;

  740.     case AV_OPT_TYPE_IMAGE_SIZE:

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

  742.         break;

  743.     case AV_OPT_TYPE_PIXEL_FMT:

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

  745.         break;

  746.     case AV_OPT_TYPE_SAMPLE_FMT:

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

  748.         break;

  749.     case AV_OPT_TYPE_DURATION:

  750.         i64 = *(int64_t *)dst;

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

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

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

  754.         break;

  755.     case AV_OPT_TYPE_COLOR:

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

  757.         break;

  758.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  759.         i64 = *(int64_t *)dst;

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

  761.         break;

  762.     default:

  763.         return AVERROR(EINVAL);

  764.     }

  765. 

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

  767.         return AVERROR(EINVAL);

  768.     *out_val = av_strdup(buf);

  769.     return 0;

  770. }

  771. 

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

  773.                       int search_flags)

  774. {

  775.     void *dst, *target_obj;

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

  777.     if (!o || !target_obj)

  778.         goto error;

  779. 

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

  781. 

  782.     if (o_out) *o_out= o;

  783. 

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

  785. 

  786. error:

  787.     *den=*intnum=0;

  788.     return -1;

  789. }

  790. 

  791. #if FF_API_OLD_AVOPTIONS

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

  793. {

  794.     int64_t intnum=1;

  795.     double num=1;

  796.     int den=1;

  797. 

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

  799.         return NAN;

  800.     return num*intnum/den;

  801. }

  802. 

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

  804. {

  805.     int64_t intnum=1;

  806.     double num=1;

  807.     int den=1;

  808. 

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

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

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

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

  813.     else

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

  815. }

  816. 

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

  818. {

  819.     int64_t intnum=1;

  820.     double num=1;

  821.     int den=1;

  822. 

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

  824.         return -1;

  825.     return num*intnum/den;

  826. }

  827. #endif

  828. 

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

  830. {

  831.     int64_t intnum = 1;

  832.     double     num = 1;

  833.     int   ret, den = 1;

  834. 

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

  836.         return ret;

  837.     *out_val = num*intnum/den;

  838.     return 0;

  839. }

  840. 

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

  842. {

  843.     int64_t intnum = 1;

  844.     double     num = 1;

  845.     int   ret, den = 1;

  846. 

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

  848.         return ret;

  849.     *out_val = num*intnum/den;

  850.     return 0;

  851. }

  852. 

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

  854. {

  855.     int64_t intnum = 1;

  856.     double     num = 1;

  857.     int   ret, den = 1;

  858. 

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

  860.         return ret;

  861. 

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

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

  864.     else

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

  866.     return 0;

  867. }

  868. 

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

  870. {

  871.     void *dst, *target_obj;

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

  873.     if (!o || !target_obj)

  874.         return AVERROR_OPTION_NOT_FOUND;

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

  876.         av_log(obj, AV_LOG_ERROR,

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

  878.         return AVERROR(EINVAL);

  879.     }

  880. 

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

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

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

  884.     return 0;

  885. }

  886. 

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

  888. {

  889.     int64_t intnum = 1;

  890.     double     num = 1;

  891.     int   ret, den = 1;

  892. 

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

  894.         return ret;

  895. 

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

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

  898.     else

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

  900.     return 0;

  901. }

  902. 

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

  904.                       enum AVOptionType type, const char *desc)

  905. {

  906.     void *dst, *target_obj;

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

  908.     if (!o || !target_obj)

  909.         return AVERROR_OPTION_NOT_FOUND;

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

  911.         av_log(obj, AV_LOG_ERROR,

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

  913.         return AVERROR(EINVAL);

  914.     }

  915. 

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

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

  918.     return 0;

  919. }

  920. 

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

  922. {

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

  924. }

  925. 

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

  927. {

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

  929. }

  930. 

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

  932. {

  933.     void *dst, *target_obj;

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

  935.     if (!o || !target_obj)

  936.         return AVERROR_OPTION_NOT_FOUND;

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

  938.         av_log(obj, AV_LOG_ERROR,

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

  940.         return AVERROR(EINVAL);

  941.     }

  942. 

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

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

  945.     return 0;

  946. }

  947. 

  948. int av_opt_get_dict_val(void *obj, const char *name, int search_flags, AVDictionary **out_val)

  949. {

  950.     void *target_obj;

  951.     AVDictionary *src;

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

  953. 

  954.     if (!o || !target_obj)

  955.         return AVERROR_OPTION_NOT_FOUND;

  956.     if (o->type != AV_OPT_TYPE_DICT)

  957.         return AVERROR(EINVAL);

  958. 

  959.     src = *(AVDictionary **)(((uint8_t *)target_obj) + o->offset);

  960.     av_dict_copy(out_val, src, 0);

  961. 

  962.     return 0;

  963. }

  964. 

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

  966. {

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

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

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

  970.     int64_t res;

  971. 

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

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

  974.         return 0;

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

  976. }

  977. 

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

  979. {

  980.     if      (d == INT_MAX) {

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  1000.     } else if (d == DBL_MIN) {

  1001.         av_log(av_log_obj, level, "DBL_MIN");

  1002.     } else if (d == -DBL_MAX) {

  1003.         av_log(av_log_obj, level, "-DBL_MAX");

  1004.     } else if (d == -DBL_MIN) {

  1005.         av_log(av_log_obj, level, "-DBL_MIN");

  1006.     } else {

  1007.         av_log(av_log_obj, level, "%g", d);

  1008.     }

  1009. }

  1010. 

  1011. static void opt_list(void *obj, void *av_log_obj, const char *unit,

  1012.                      int req_flags, int rej_flags)

  1013. {

  1014.     const AVOption *opt=NULL;

  1015.     AVOptionRanges *r;

  1016.     int i;

  1017. 

  1018.     while ((opt = av_opt_next(obj, opt))) {

  1019.         if (!(opt->flags & req_flags) || (opt->flags & rej_flags))

  1020.             continue;

  1021. 

  1022.         /* Don't print CONST's on level one.

  1023.          * Don't print anything but CONST's on level two.

  1024.          * Only print items from the requested unit.

  1025.          */

  1026.         if (!unit && opt->type==AV_OPT_TYPE_CONST)

  1027.             continue;

  1028.         else if (unit && opt->type!=AV_OPT_TYPE_CONST)

  1029.             continue;

  1030.         else if (unit && opt->type==AV_OPT_TYPE_CONST && strcmp(unit, opt->unit))

  1031.             continue;

  1032.         else if (unit && opt->type == AV_OPT_TYPE_CONST)

  1033.             av_log(av_log_obj, AV_LOG_INFO, "     %-15s ", opt->name);

  1034.         else

  1035.             av_log(av_log_obj, AV_LOG_INFO, "  %s%-17s ",

  1036.                    (opt->flags & AV_OPT_FLAG_FILTERING_PARAM) ? "" : "-",

  1037.                    opt->name);

  1038. 

  1039.         switch (opt->type) {

  1040.             case AV_OPT_TYPE_FLAGS:

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

  1042.                 break;

  1043.             case AV_OPT_TYPE_INT:

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

  1045.                 break;

  1046.             case AV_OPT_TYPE_INT64:

  1047.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<int64>");

  1048.                 break;

  1049.             case AV_OPT_TYPE_DOUBLE:

  1050.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<double>");

  1051.                 break;

  1052.             case AV_OPT_TYPE_FLOAT:

  1053.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<float>");

  1054.                 break;

  1055.             case AV_OPT_TYPE_STRING:

  1056.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<string>");

  1057.                 break;

  1058.             case AV_OPT_TYPE_RATIONAL:

  1059.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<rational>");

  1060.                 break;

  1061.             case AV_OPT_TYPE_BINARY:

  1062.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<binary>");

  1063.                 break;

  1064.             case AV_OPT_TYPE_IMAGE_SIZE:

  1065.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<image_size>");

  1066.                 break;

  1067.             case AV_OPT_TYPE_VIDEO_RATE:

  1068.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<video_rate>");

  1069.                 break;

  1070.             case AV_OPT_TYPE_PIXEL_FMT:

  1071.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<pix_fmt>");

  1072.                 break;

  1073.             case AV_OPT_TYPE_SAMPLE_FMT:

  1074.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<sample_fmt>");

  1075.                 break;

  1076.             case AV_OPT_TYPE_DURATION:

  1077.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<duration>");

  1078.                 break;

  1079.             case AV_OPT_TYPE_COLOR:

  1080.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<color>");

  1081.                 break;

  1082.             case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1083.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<channel_layout>");

  1084.                 break;

  1085.             case AV_OPT_TYPE_CONST:

  1086.             default:

  1087.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "");

  1088.                 break;

  1089.         }

  1090.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_ENCODING_PARAM) ? 'E' : '.');

  1091.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_DECODING_PARAM) ? 'D' : '.');

  1092.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_FILTERING_PARAM)? 'F' : '.');

  1093.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_VIDEO_PARAM   ) ? 'V' : '.');

  1094.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_AUDIO_PARAM   ) ? 'A' : '.');

  1095.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_SUBTITLE_PARAM) ? 'S' : '.');

  1096.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_EXPORT)         ? 'X' : '.');

  1097.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_READONLY)       ? 'R' : '.');

  1098. 

  1099.         if (opt->help)

  1100.             av_log(av_log_obj, AV_LOG_INFO, " %s", opt->help);

  1101. 

  1102.         if (av_opt_query_ranges(&r, obj, opt->name, AV_OPT_SEARCH_FAKE_OBJ) >= 0) {

  1103.             switch (opt->type) {

  1104.             case AV_OPT_TYPE_INT:

  1105.             case AV_OPT_TYPE_INT64:

  1106.             case AV_OPT_TYPE_DOUBLE:

  1107.             case AV_OPT_TYPE_FLOAT:

  1108.             case AV_OPT_TYPE_RATIONAL:

  1109.                 for (i = 0; i < r->nb_ranges; i++) {

  1110.                     av_log(av_log_obj, AV_LOG_INFO, " (from ");

  1111.                     log_value(av_log_obj, AV_LOG_INFO, r->range[i]->value_min);

  1112.                     av_log(av_log_obj, AV_LOG_INFO, " to ");

  1113.                     log_value(av_log_obj, AV_LOG_INFO, r->range[i]->value_max);

  1114.                     av_log(av_log_obj, AV_LOG_INFO, ")");

  1115.                 }

  1116.                 break;

  1117.             }

  1118.             av_opt_freep_ranges(&r);

  1119.         }

  1120. 

  1121.         if (opt->type != AV_OPT_TYPE_CONST  &&

  1122.             opt->type != AV_OPT_TYPE_BINARY &&

  1123.                 !((opt->type == AV_OPT_TYPE_COLOR      ||

  1124.                    opt->type == AV_OPT_TYPE_IMAGE_SIZE ||

  1125.                    opt->type == AV_OPT_TYPE_STRING     ||

  1126.                    opt->type == AV_OPT_TYPE_VIDEO_RATE) &&

  1127.                   !opt->default_val.str)) {

  1128.             av_log(av_log_obj, AV_LOG_INFO, " (default ");

  1129.             switch (opt->type) {

  1130.             case AV_OPT_TYPE_FLAGS:

  1131.                 av_log(av_log_obj, AV_LOG_INFO, "%"PRIX64, opt->default_val.i64);

  1132.                 break;

  1133.             case AV_OPT_TYPE_DURATION:

  1134.             case AV_OPT_TYPE_INT:

  1135.             case AV_OPT_TYPE_INT64:

  1136.                 log_value(av_log_obj, AV_LOG_INFO, opt->default_val.i64);

  1137.                 break;

  1138.             case AV_OPT_TYPE_DOUBLE:

  1139.             case AV_OPT_TYPE_FLOAT:

  1140.                 log_value(av_log_obj, AV_LOG_INFO, opt->default_val.dbl);

  1141.                 break;

  1142.             case AV_OPT_TYPE_RATIONAL: {

  1143.                 AVRational q = av_d2q(opt->default_val.dbl, INT_MAX);

  1144.                 av_log(av_log_obj, AV_LOG_INFO, "%d/%d", q.num, q.den); }

  1145.                 break;

  1146.             case AV_OPT_TYPE_PIXEL_FMT:

  1147.                 av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(av_get_pix_fmt_name(opt->default_val.i64), "none"));

  1148.                 break;

  1149.             case AV_OPT_TYPE_SAMPLE_FMT:

  1150.                 av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(av_get_sample_fmt_name(opt->default_val.i64), "none"));

  1151.                 break;

  1152.             case AV_OPT_TYPE_COLOR:

  1153.             case AV_OPT_TYPE_IMAGE_SIZE:

  1154.             case AV_OPT_TYPE_STRING:

  1155.             case AV_OPT_TYPE_VIDEO_RATE:

  1156.                 av_log(av_log_obj, AV_LOG_INFO, "\"%s\"", opt->default_val.str);

  1157.                 break;

  1158.             case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1159.                 av_log(av_log_obj, AV_LOG_INFO, "0x%"PRIx64, opt->default_val.i64);

  1160.                 break;

  1161.             }

  1162.             av_log(av_log_obj, AV_LOG_INFO, ")");

  1163.         }

  1164. 

  1165.         av_log(av_log_obj, AV_LOG_INFO, "\n");

  1166.         if (opt->unit && opt->type != AV_OPT_TYPE_CONST) {

  1167.             opt_list(obj, av_log_obj, opt->unit, req_flags, rej_flags);

  1168.         }

  1169.     }

  1170. }

  1171. 

  1172. int av_opt_show2(void *obj, void *av_log_obj, int req_flags, int rej_flags)

  1173. {

  1174.     if (!obj)

  1175.         return -1;

  1176. 

  1177.     av_log(av_log_obj, AV_LOG_INFO, "%s AVOptions:\n", (*(AVClass**)obj)->class_name);

  1178. 

  1179.     opt_list(obj, av_log_obj, NULL, req_flags, rej_flags);

  1180. 

  1181.     return 0;

  1182. }

  1183. 

  1184. void av_opt_set_defaults(void *s)

  1185. {

  1186. #if FF_API_OLD_AVOPTIONS

  1187.     av_opt_set_defaults2(s, 0, 0);

  1188. }

  1189. 

  1190. void av_opt_set_defaults2(void *s, int mask, int flags)

  1191. {

  1192. #endif

  1193.     const AVClass *class = *(AVClass **)s;

  1194.     const AVOption *opt = NULL;

  1195.     while ((opt = av_opt_next(s, opt)) != NULL) {

  1196.         void *dst = ((uint8_t*)s) + opt->offset;

  1197. #if FF_API_OLD_AVOPTIONS

  1198.         if ((opt->flags & mask) != flags)

  1199.             continue;

  1200. #endif

  1201. 

  1202.         if (opt->flags & AV_OPT_FLAG_READONLY)

  1203.             continue;

  1204. 

  1205.         switch (opt->type) {

  1206.             case AV_OPT_TYPE_CONST:

  1207.                 /* Nothing to be done here */

  1208.             break;

  1209.             case AV_OPT_TYPE_FLAGS:

  1210.             case AV_OPT_TYPE_INT:

  1211.             case AV_OPT_TYPE_INT64:

  1212.             case AV_OPT_TYPE_DURATION:

  1213.             case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1214.                 write_number(s, opt, dst, 1, 1, opt->default_val.i64);

  1215.             break;

  1216.             case AV_OPT_TYPE_DOUBLE:

  1217.             case AV_OPT_TYPE_FLOAT: {

  1218.                 double val;

  1219.                 val = opt->default_val.dbl;

  1220.                 write_number(s, opt, dst, val, 1, 1);

  1221.             }

  1222.             break;

  1223.             case AV_OPT_TYPE_RATIONAL: {

  1224.                 AVRational val;

  1225.                 val = av_d2q(opt->default_val.dbl, INT_MAX);

  1226.                 write_number(s, opt, dst, 1, val.den, val.num);

  1227.             }

  1228.             break;

  1229.             case AV_OPT_TYPE_COLOR:

  1230.                 set_string_color(s, opt, opt->default_val.str, dst);

  1231.                 break;

  1232.             case AV_OPT_TYPE_STRING:

  1233.                 set_string(s, opt, opt->default_val.str, dst);

  1234.                 break;

  1235.             case AV_OPT_TYPE_IMAGE_SIZE:

  1236.                 set_string_image_size(s, opt, opt->default_val.str, dst);

  1237.                 break;

  1238.             case AV_OPT_TYPE_VIDEO_RATE:

  1239.                 set_string_video_rate(s, opt, opt->default_val.str, dst);

  1240.                 break;

  1241.             case AV_OPT_TYPE_PIXEL_FMT:

  1242. #if LIBAVUTIL_VERSION_MAJOR < 54

  1243.                 if (class->version && class->version < AV_VERSION_INT(52, 10, 100))

  1244.                     av_opt_set(s, opt->name, opt->default_val.str, 0);

  1245.                 else

  1246. #endif

  1247.                     write_number(s, opt, dst, 1, 1, opt->default_val.i64);

  1248.                 break;

  1249.             case AV_OPT_TYPE_SAMPLE_FMT:

  1250. #if LIBAVUTIL_VERSION_MAJOR < 54

  1251.                 if (class->version && class->version < AV_VERSION_INT(52, 10, 100))

  1252.                     av_opt_set(s, opt->name, opt->default_val.str, 0);

  1253.                 else

  1254. #endif

  1255.                     write_number(s, opt, dst, 1, 1, opt->default_val.i64);

  1256.                 break;

  1257.             case AV_OPT_TYPE_BINARY:

  1258.             case AV_OPT_TYPE_DICT:

  1259.                 /* Cannot set defaults for these types */

  1260.             break;

  1261.             default:

  1262.                 av_log(s, AV_LOG_DEBUG, "AVOption type %d of option %s not implemented yet\n", opt->type, opt->name);

  1263.         }

  1264.     }

  1265. }

  1266. 

  1267. /**

  1268.  * Store the value in the field in ctx that is named like key.

  1269.  * ctx must be an AVClass context, storing is done using AVOptions.

  1270.  *

  1271.  * @param buf the string to parse, buf will be updated to point at the

  1272.  * separator just after the parsed key/value pair

  1273.  * @param key_val_sep a 0-terminated list of characters used to

  1274.  * separate key from value

  1275.  * @param pairs_sep a 0-terminated list of characters used to separate

  1276.  * two pairs from each other

  1277.  * @return 0 if the key/value pair has been successfully parsed and

  1278.  * set, or a negative value corresponding to an AVERROR code in case

  1279.  * of error:

  1280.  * AVERROR(EINVAL) if the key/value pair cannot be parsed,

  1281.  * the error code issued by av_opt_set() if the key/value pair

  1282.  * cannot be set

  1283.  */

  1284. static int parse_key_value_pair(void *ctx, const char **buf,

  1285.                                 const char *key_val_sep, const char *pairs_sep)

  1286. {

  1287.     char *key = av_get_token(buf, key_val_sep);

  1288.     char *val;

  1289.     int ret;

  1290. 

  1291.     if (!key)

  1292.         return AVERROR(ENOMEM);

  1293. 

  1294.     if (*key && strspn(*buf, key_val_sep)) {

  1295.         (*buf)++;

  1296.         val = av_get_token(buf, pairs_sep);

  1297.         if (!val) {

  1298.             av_freep(&key);

  1299.             return AVERROR(ENOMEM);

  1300.         }

  1301.     } else {

  1302.         av_log(ctx, AV_LOG_ERROR, "Missing key or no key/value separator found after key '%s'\n", key);

  1303.         av_free(key);

  1304.         return AVERROR(EINVAL);

  1305.     }

  1306. 

  1307.     av_log(ctx, AV_LOG_DEBUG, "Setting entry with key '%s' to value '%s'\n", key, val);

  1308. 

  1309.     ret = av_opt_set(ctx, key, val, AV_OPT_SEARCH_CHILDREN);

  1310.     if (ret == AVERROR_OPTION_NOT_FOUND)

  1311.         av_log(ctx, AV_LOG_ERROR, "Key '%s' not found.\n", key);

  1312. 

  1313.     av_free(key);

  1314.     av_free(val);

  1315.     return ret;

  1316. }

  1317. 

  1318. int av_set_options_string(void *ctx, const char *opts,

  1319.                           const char *key_val_sep, const char *pairs_sep)

  1320. {

  1321.     int ret, count = 0;

  1322. 

  1323.     if (!opts)

  1324.         return 0;

  1325. 

  1326.     while (*opts) {

  1327.         if ((ret = parse_key_value_pair(ctx, &opts, key_val_sep, pairs_sep)) < 0)

  1328.             return ret;

  1329.         count++;

  1330. 

  1331.         if (*opts)

  1332.             opts++;

  1333.     }

  1334. 

  1335.     return count;

  1336. }

  1337. 

  1338. #define WHITESPACES " \n\t"

  1339. 

  1340. static int is_key_char(char c)

  1341. {

  1342.     return (unsigned)((c | 32) - 'a') < 26 ||

  1343.            (unsigned)(c - '0') < 10 ||

  1344.            c == '-' || c == '_' || c == '/' || c == '.';

  1345. }

  1346. 

  1347. /**

  1348.  * Read a key from a string.

  1349.  *

  1350.  * The key consists of is_key_char characters and must be terminated by a

  1351.  * character from the delim string; spaces are ignored.

  1352.  *

  1353.  * @return  0 for success (even with ellipsis), <0 for failure

  1354.  */

  1355. static int get_key(const char **ropts, const char *delim, char **rkey)

  1356. {

  1357.     const char *opts = *ropts;

  1358.     const char *key_start, *key_end;

  1359. 

  1360.     key_start = opts += strspn(opts, WHITESPACES);

  1361.     while (is_key_char(*opts))

  1362.         opts++;

  1363.     key_end = opts;

  1364.     opts += strspn(opts, WHITESPACES);

  1365.     if (!*opts || !strchr(delim, *opts))

  1366.         return AVERROR(EINVAL);

  1367.     opts++;

  1368.     if (!(*rkey = av_malloc(key_end - key_start + 1)))

  1369.         return AVERROR(ENOMEM);

  1370.     memcpy(*rkey, key_start, key_end - key_start);

  1371.     (*rkey)[key_end - key_start] = 0;

  1372.     *ropts = opts;

  1373.     return 0;

  1374. }

  1375. 

  1376. int av_opt_get_key_value(const char **ropts,

  1377.                          const char *key_val_sep, const char *pairs_sep,

  1378.                          unsigned flags,

  1379.                          char **rkey, char **rval)

  1380. {

  1381.     int ret;

  1382.     char *key = NULL, *val;

  1383.     const char *opts = *ropts;

  1384. 

  1385.     if ((ret = get_key(&opts, key_val_sep, &key)) < 0 &&

  1386.         !(flags & AV_OPT_FLAG_IMPLICIT_KEY))

  1387.         return AVERROR(EINVAL);

  1388.     if (!(val = av_get_token(&opts, pairs_sep))) {

  1389.         av_free(key);

  1390.         return AVERROR(ENOMEM);

  1391.     }

  1392.     *ropts = opts;

  1393.     *rkey  = key;

  1394.     *rval  = val;

  1395.     return 0;

  1396. }

  1397. 

  1398. int av_opt_set_from_string(void *ctx, const char *opts,

  1399.                            const char *const *shorthand,

  1400.                            const char *key_val_sep, const char *pairs_sep)

  1401. {

  1402.     int ret, count = 0;

  1403.     const char *dummy_shorthand = NULL;

  1404.     char *av_uninit(parsed_key), *av_uninit(value);

  1405.     const char *key;

  1406. 

  1407.     if (!opts)

  1408.         return 0;

  1409.     if (!shorthand)

  1410.         shorthand = &dummy_shorthand;

  1411. 

  1412.     while (*opts) {

  1413.         ret = av_opt_get_key_value(&opts, key_val_sep, pairs_sep,

  1414.                                    *shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,

  1415.                                    &parsed_key, &value);

  1416.         if (ret < 0) {

  1417.             if (ret == AVERROR(EINVAL))

  1418.                 av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", opts);

  1419.             else

  1420.                 av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", opts,

  1421.                        av_err2str(ret));

  1422.             return ret;

  1423.         }

  1424.         if (*opts)

  1425.             opts++;

  1426.         if (parsed_key) {

  1427.             key = parsed_key;

  1428.             while (*shorthand) /* discard all remaining shorthand */

  1429.                 shorthand++;

  1430.         } else {

  1431.             key = *(shorthand++);

  1432.         }

  1433. 

  1434.         av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);

  1435.         if ((ret = av_opt_set(ctx, key, value, 0)) < 0) {

  1436.             if (ret == AVERROR_OPTION_NOT_FOUND)

  1437.                 av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);

  1438.             av_free(value);

  1439.             av_free(parsed_key);

  1440.             return ret;

  1441.         }

  1442. 

  1443.         av_free(value);

  1444.         av_free(parsed_key);

  1445.         count++;

  1446.     }

  1447.     return count;

  1448. }

  1449. 

  1450. void av_opt_free(void *obj)

  1451. {

  1452.     const AVOption *o = NULL;

  1453.     while ((o = av_opt_next(obj, o))) {

  1454.         switch (o->type) {

  1455.         case AV_OPT_TYPE_STRING:

  1456.         case AV_OPT_TYPE_BINARY:

  1457.             av_freep((uint8_t *)obj + o->offset);

  1458.             break;

  1459. 

  1460.         case AV_OPT_TYPE_DICT:

  1461.             av_dict_free((AVDictionary **)(((uint8_t *)obj) + o->offset));

  1462.             break;

  1463. 

  1464.         default:

  1465.             break;

  1466.         }

  1467.     }

  1468. }

  1469. 

  1470. int av_opt_set_dict2(void *obj, AVDictionary **options, int search_flags)

  1471. {

  1472.     AVDictionaryEntry *t = NULL;

  1473.     AVDictionary    *tmp = NULL;

  1474.     int ret = 0;

  1475. 

  1476.     if (!options)

  1477.         return 0;

  1478. 

  1479.     while ((t = av_dict_get(*options, "", t, AV_DICT_IGNORE_SUFFIX))) {

  1480.         ret = av_opt_set(obj, t->key, t->value, search_flags);

  1481.         if (ret == AVERROR_OPTION_NOT_FOUND)

  1482.             av_dict_set(&tmp, t->key, t->value, 0);

  1483.         else if (ret < 0) {

  1484.             av_log(obj, AV_LOG_ERROR, "Error setting option %s to value %s.\n", t->key, t->value);

  1485.             break;

  1486.         }

  1487.         ret = 0;

  1488.     }

  1489.     av_dict_free(options);

  1490.     *options = tmp;

  1491.     return ret;

  1492. }

  1493. 

  1494. int av_opt_set_dict(void *obj, AVDictionary **options)

  1495. {

  1496.     return av_opt_set_dict2(obj, options, 0);

  1497. }

  1498. 

  1499. const AVOption *av_opt_find(void *obj, const char *name, const char *unit,

  1500.                             int opt_flags, int search_flags)

  1501. {

  1502.     return av_opt_find2(obj, name, unit, opt_flags, search_flags, NULL);

  1503. }

  1504. 

  1505. const AVOption *av_opt_find2(void *obj, const char *name, const char *unit,

  1506.                              int opt_flags, int search_flags, void **target_obj)

  1507. {

  1508.     const AVClass  *c;

  1509.     const AVOption *o = NULL;

  1510. 

  1511.     if(!obj)

  1512.         return NULL;

  1513. 

  1514.     c= *(AVClass**)obj;

  1515. 

  1516.     if (!c)

  1517.         return NULL;

  1518. 

  1519.     if (search_flags & AV_OPT_SEARCH_CHILDREN) {

  1520.         if (search_flags & AV_OPT_SEARCH_FAKE_OBJ) {

  1521.             const AVClass *child = NULL;

  1522.             while (child = av_opt_child_class_next(c, child))

  1523.                 if (o = av_opt_find2(&child, name, unit, opt_flags, search_flags, NULL))

  1524.                     return o;

  1525.         } else {

  1526.             void *child = NULL;

  1527.             while (child = av_opt_child_next(obj, child))

  1528.                 if (o = av_opt_find2(child, name, unit, opt_flags, search_flags, target_obj))

  1529.                     return o;

  1530.         }

  1531.     }

  1532. 

  1533.     while (o = av_opt_next(obj, o)) {

  1534.         if (!strcmp(o->name, name) && (o->flags & opt_flags) == opt_flags &&

  1535.             ((!unit && o->type != AV_OPT_TYPE_CONST) ||

  1536.              (unit  && o->type == AV_OPT_TYPE_CONST && o->unit && !strcmp(o->unit, unit)))) {

  1537.             if (target_obj) {

  1538.                 if (!(search_flags & AV_OPT_SEARCH_FAKE_OBJ))

  1539.                     *target_obj = obj;

  1540.                 else

  1541.                     *target_obj = NULL;

  1542.             }

  1543.             return o;

  1544.         }

  1545.     }

  1546.     return NULL;

  1547. }

  1548. 

  1549. void *av_opt_child_next(void *obj, void *prev)

  1550. {

  1551.     const AVClass *c = *(AVClass**)obj;

  1552.     if (c->child_next)

  1553.         return c->child_next(obj, prev);

  1554.     return NULL;

  1555. }

  1556. 

  1557. const AVClass *av_opt_child_class_next(const AVClass *parent, const AVClass *prev)

  1558. {

  1559.     if (parent->child_class_next)

  1560.         return parent->child_class_next(prev);

  1561.     return NULL;

  1562. }

  1563. 

  1564. void *av_opt_ptr(const AVClass *class, void *obj, const char *name)

  1565. {

  1566.     const AVOption *opt= av_opt_find2(&class, name, NULL, 0, AV_OPT_SEARCH_FAKE_OBJ, NULL);

  1567.     if(!opt)

  1568.         return NULL;

  1569.     return (uint8_t*)obj + opt->offset;

  1570. }

  1571. 

  1572. static int opt_size(enum AVOptionType type)

  1573. {

  1574.     switch(type) {

  1575.     case AV_OPT_TYPE_INT:

  1576.     case AV_OPT_TYPE_FLAGS:     return sizeof(int);

  1577.     case AV_OPT_TYPE_DURATION:

  1578.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1579.     case AV_OPT_TYPE_INT64:     return sizeof(int64_t);

  1580.     case AV_OPT_TYPE_DOUBLE:    return sizeof(double);

  1581.     case AV_OPT_TYPE_FLOAT:     return sizeof(float);

  1582.     case AV_OPT_TYPE_STRING:    return sizeof(uint8_t*);

  1583.     case AV_OPT_TYPE_VIDEO_RATE:

  1584.     case AV_OPT_TYPE_RATIONAL:  return sizeof(AVRational);

  1585.     case AV_OPT_TYPE_BINARY:    return sizeof(uint8_t*) + sizeof(int);

  1586.     case AV_OPT_TYPE_IMAGE_SIZE:return sizeof(int[2]);

  1587.     case AV_OPT_TYPE_PIXEL_FMT: return sizeof(enum AVPixelFormat);

  1588.     case AV_OPT_TYPE_SAMPLE_FMT:return sizeof(enum AVSampleFormat);

  1589.     case AV_OPT_TYPE_COLOR:     return 4;

  1590.     }

  1591.     return 0;

  1592. }

  1593. 

  1594. int av_opt_copy(void *dst, void *src)

  1595. {

  1596.     const AVOption *o = NULL;

  1597.     const AVClass *c;

  1598.     int ret = 0;

  1599. 

  1600.     if (!src)

  1601.         return 0;

  1602. 

  1603.     c = *(AVClass**)src;

  1604.     if (*(AVClass**)dst && c != *(AVClass**)dst)

  1605.         return AVERROR(EINVAL);

  1606. 

  1607.     while ((o = av_opt_next(src, o))) {

  1608.         void *field_dst = ((uint8_t*)dst) + o->offset;

  1609.         void *field_src = ((uint8_t*)src) + o->offset;

  1610.         uint8_t **field_dst8 = (uint8_t**)field_dst;

  1611.         uint8_t **field_src8 = (uint8_t**)field_src;

  1612. 

  1613.         if (o->type == AV_OPT_TYPE_STRING) {

  1614.             if (*field_dst8 != *field_src8)

  1615.                 av_freep(field_dst8);

  1616.             *field_dst8 = av_strdup(*field_src8);

  1617.             if (*field_src8 && !*field_dst8)

  1618.                 ret = AVERROR(ENOMEM);

  1619.         } else if (o->type == AV_OPT_TYPE_BINARY) {

  1620.             int len = *(int*)(field_src8 + 1);

  1621.             if (*field_dst8 != *field_src8)

  1622.                 av_freep(field_dst8);

  1623.             *field_dst8 = av_memdup(*field_src8, len);

  1624.             if (len && !*field_dst8) {

  1625.                 ret = AVERROR(ENOMEM);

  1626.                 len = 0;

  1627.             }

  1628.             *(int*)(field_dst8 + 1) = len;

  1629.         } else if (o->type == AV_OPT_TYPE_CONST) {

  1630.             // do nothing

  1631.         } else {

  1632.             memcpy(field_dst, field_src, opt_size(o->type));

  1633.         }

  1634.     }

  1635.     return ret;

  1636. }

  1637. 

  1638. int av_opt_query_ranges(AVOptionRanges **ranges_arg, void *obj, const char *key, int flags)

  1639. {

  1640.     int ret;

  1641.     const AVClass *c = *(AVClass**)obj;

  1642.     int (*callback)(AVOptionRanges **, void *obj, const char *key, int flags) = NULL;

  1643. 

  1644.     if (c->version > (52 << 16 | 11 << 8))

  1645.         callback = c->query_ranges;

  1646. 

  1647.     if (!callback)

  1648.         callback = av_opt_query_ranges_default;

  1649. 

  1650.     ret = callback(ranges_arg, obj, key, flags);

  1651.     if (ret >= 0) {

  1652.         if (!(flags & AV_OPT_MULTI_COMPONENT_RANGE))

  1653.             ret = 1;

  1654.         (*ranges_arg)->nb_components = ret;

  1655.     }

  1656.     return ret;

  1657. }

  1658. 

  1659. int av_opt_query_ranges_default(AVOptionRanges **ranges_arg, void *obj, const char *key, int flags)

  1660. {

  1661.     AVOptionRanges *ranges = av_mallocz(sizeof(*ranges));

  1662.     AVOptionRange **range_array = av_mallocz(sizeof(void*));

  1663.     AVOptionRange *range = av_mallocz(sizeof(*range));

  1664.     const AVOption *field = av_opt_find(obj, key, NULL, 0, flags);

  1665.     int ret;

  1666. 

  1667.     *ranges_arg = NULL;

  1668. 

  1669.     if (!ranges || !range || !range_array || !field) {

  1670.         ret = AVERROR(ENOMEM);

  1671.         goto fail;

  1672.     }

  1673. 

  1674.     ranges->range = range_array;

  1675.     ranges->range[0] = range;

  1676.     ranges->nb_ranges = 1;

  1677.     ranges->nb_components = 1;

  1678.     range->is_range = 1;

  1679.     range->value_min = field->min;

  1680.     range->value_max = field->max;

  1681. 

  1682.     switch (field->type) {

  1683.     case AV_OPT_TYPE_INT:

  1684.     case AV_OPT_TYPE_INT64:

  1685.     case AV_OPT_TYPE_PIXEL_FMT:

  1686.     case AV_OPT_TYPE_SAMPLE_FMT:

  1687.     case AV_OPT_TYPE_FLOAT:

  1688.     case AV_OPT_TYPE_DOUBLE:

  1689.     case AV_OPT_TYPE_DURATION:

  1690.     case AV_OPT_TYPE_COLOR:

  1691.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1692.         break;

  1693.     case AV_OPT_TYPE_STRING:

  1694.         range->component_min = 0;

  1695.         range->component_max = 0x10FFFF; // max unicode value

  1696.         range->value_min = -1;

  1697.         range->value_max = INT_MAX;

  1698.         break;

  1699.     case AV_OPT_TYPE_RATIONAL:

  1700.         range->component_min = INT_MIN;

  1701.         range->component_max = INT_MAX;

  1702.         break;

  1703.     case AV_OPT_TYPE_IMAGE_SIZE:

  1704.         range->component_min = 0;

  1705.         range->component_max = INT_MAX/128/8;

  1706.         range->value_min = 0;

  1707.         range->value_max = INT_MAX/8;

  1708.         break;

  1709.     case AV_OPT_TYPE_VIDEO_RATE:

  1710.         range->component_min = 1;

  1711.         range->component_max = INT_MAX;

  1712.         range->value_min = 1;

  1713.         range->value_max = INT_MAX;

  1714.         break;

  1715.     default:

  1716.         ret = AVERROR(ENOSYS);

  1717.         goto fail;

  1718.     }

  1719. 

  1720.     *ranges_arg = ranges;

  1721.     return 1;

  1722. fail:

  1723.     av_free(ranges);

  1724.     av_free(range);

  1725.     av_free(range_array);

  1726.     return ret;

  1727. }

  1728. 

  1729. void av_opt_freep_ranges(AVOptionRanges **rangesp)

  1730. {

  1731.     int i;

  1732.     AVOptionRanges *ranges = *rangesp;

  1733. 

  1734.     if (!ranges)

  1735.         return;

  1736. 

  1737.     for (i = 0; i < ranges->nb_ranges * ranges->nb_components; i++) {

  1738.         AVOptionRange *range = ranges->range[i];

  1739.         if (range) {

  1740.             av_freep(&range->str);

  1741.             av_freep(&ranges->range[i]);

  1742.         }

  1743.     }

  1744.     av_freep(&ranges->range);

  1745.     av_freep(rangesp);

  1746. }

  1747. 

  1748. #ifdef TEST

  1749. 

  1750. typedef struct TestContext

  1751. {

  1752.     const AVClass *class;

  1753.     int num;

  1754.     int toggle;

  1755.     char *string;

  1756.     int flags;

  1757.     AVRational rational;

  1758.     AVRational video_rate;

  1759.     int w, h;

  1760.     enum AVPixelFormat pix_fmt;

  1761.     enum AVSampleFormat sample_fmt;

  1762.     int64_t duration;

  1763.     uint8_t color[4];

  1764.     int64_t channel_layout;

  1765. } TestContext;

  1766. 

  1767. #define OFFSET(x) offsetof(TestContext, x)

  1768. 

  1769. #define TEST_FLAG_COOL 01

  1770. #define TEST_FLAG_LAME 02

  1771. #define TEST_FLAG_MU   04

  1772. 

  1773. static const AVOption test_options[]= {

  1774. {"num",      "set num",        OFFSET(num),      AV_OPT_TYPE_INT,      {.i64 = 0},       0,        100                 },

  1775. {"toggle",   "set toggle",     OFFSET(toggle),   AV_OPT_TYPE_INT,      {.i64 = 0},       0,        1                   },

  1776. {"rational", "set rational",   OFFSET(rational), AV_OPT_TYPE_RATIONAL, {.dbl = 0},       0,        10                  },

  1777. {"string",   "set string",     OFFSET(string),   AV_OPT_TYPE_STRING,   {.str = "default"}, CHAR_MIN, CHAR_MAX          },

  1778. {"flags",    "set flags",      OFFSET(flags),    AV_OPT_TYPE_FLAGS,    {.i64 = 0},       0,        INT_MAX, 0, "flags" },

  1779. {"cool",     "set cool flag ", 0,                AV_OPT_TYPE_CONST,    {.i64 = TEST_FLAG_COOL}, INT_MIN,  INT_MAX, 0, "flags" },

  1780. {"lame",     "set lame flag ", 0,                AV_OPT_TYPE_CONST,    {.i64 = TEST_FLAG_LAME}, INT_MIN,  INT_MAX, 0, "flags" },

  1781. {"mu",       "set mu flag ",   0,                AV_OPT_TYPE_CONST,    {.i64 = TEST_FLAG_MU},   INT_MIN,  INT_MAX, 0, "flags" },

  1782. {"size",     "set size",       OFFSET(w),        AV_OPT_TYPE_IMAGE_SIZE,{0},             0,        0                   },

  1783. {"pix_fmt",  "set pixfmt",     OFFSET(pix_fmt),  AV_OPT_TYPE_PIXEL_FMT, {.i64 = AV_PIX_FMT_NONE}, -1, INT_MAX},

  1784. {"sample_fmt", "set samplefmt", OFFSET(sample_fmt), AV_OPT_TYPE_SAMPLE_FMT, {.i64 = AV_SAMPLE_FMT_NONE}, -1, INT_MAX},

  1785. {"video_rate", "set videorate", OFFSET(video_rate), AV_OPT_TYPE_VIDEO_RATE,  {.str = "25"}, 0,     0                   },

  1786. {"duration", "set duration",   OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, INT64_MAX},

  1787. {"color", "set color",   OFFSET(color), AV_OPT_TYPE_COLOR, {.str = "pink"}, 0, 0},

  1788. {"cl", "set channel layout", OFFSET(channel_layout), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64 = AV_CH_LAYOUT_HEXAGONAL}, 0, INT64_MAX},

  1789. {NULL},

  1790. };

  1791. 

  1792. static const char *test_get_name(void *ctx)

  1793. {

  1794.     return "test";

  1795. }

  1796. 

  1797. static const AVClass test_class = {

  1798.     "TestContext",

  1799.     test_get_name,

  1800.     test_options

  1801. };

  1802. 

  1803. int main(void)

  1804. {

  1805.     int i;

  1806. 

  1807.     printf("\nTesting av_set_options_string()\n");

  1808.     {

  1809.         TestContext test_ctx = { 0 };

  1810.         static const char * const options[] = {

  1811.             "",

  1812.             ":",

  1813.             "=",

  1814.             "foo=:",

  1815.             ":=foo",

  1816.             "=foo",

  1817.             "foo=",

  1818.             "foo",

  1819.             "foo=val",

  1820.             "foo==val",

  1821.             "toggle=:",

  1822.             "string=:",

  1823.             "toggle=1 : foo",

  1824.             "toggle=100",

  1825.             "toggle==1",

  1826.             "flags=+mu-lame : num=42: toggle=0",

  1827.             "num=42 : string=blahblah",

  1828.             "rational=0 : rational=1/2 : rational=1/-1",

  1829.             "rational=-1/0",

  1830.             "size=1024x768",

  1831.             "size=pal",

  1832.             "size=bogus",

  1833.             "pix_fmt=yuv420p",

  1834.             "pix_fmt=2",

  1835.             "pix_fmt=bogus",

  1836.             "sample_fmt=s16",

  1837.             "sample_fmt=2",

  1838.             "sample_fmt=bogus",

  1839.             "video_rate=pal",

  1840.             "video_rate=25",

  1841.             "video_rate=30000/1001",

  1842.             "video_rate=30/1.001",

  1843.             "video_rate=bogus",

  1844.             "duration=bogus",

  1845.             "duration=123.45",

  1846.             "duration=1\\:23\\:45.67",

  1847.             "color=blue",

  1848.             "color=0x223300",

  1849.             "color=0x42FF07AA",

  1850.             "cl=stereo+downmix",

  1851.             "cl=foo",

  1852.         };

  1853. 

  1854.         test_ctx.class = &test_class;

  1855.         av_opt_set_defaults(&test_ctx);

  1856. 

  1857.         av_log_set_level(AV_LOG_DEBUG);

  1858. 

  1859.         for (i=0; i < FF_ARRAY_ELEMS(options); i++) {

  1860.             av_log(&test_ctx, AV_LOG_DEBUG, "Setting options string '%s'\n", options[i]);

  1861.             if (av_set_options_string(&test_ctx, options[i], "=", ":") < 0)

  1862.                 av_log(&test_ctx, AV_LOG_ERROR, "Error setting options string: '%s'\n", options[i]);

  1863.             printf("\n");

  1864.         }

  1865.         av_opt_free(&test_ctx);

  1866.     }

  1867. 

  1868.     printf("\nTesting av_opt_set_from_string()\n");

  1869.     {

  1870.         TestContext test_ctx = { 0 };

  1871.         static const char * const options[] = {

  1872.             "",

  1873.             "5",

  1874.             "5:hello",

  1875.             "5:hello:size=pal",

  1876.             "5:size=pal:hello",

  1877.             ":",

  1878.             "=",

  1879.             " 5 : hello : size = pal ",

  1880.             "a_very_long_option_name_that_will_need_to_be_ellipsized_around_here=42"

  1881.         };

  1882.         static const char * const shorthand[] = { "num", "string", NULL };

  1883. 

  1884.         test_ctx.class = &test_class;

  1885.         av_opt_set_defaults(&test_ctx);

  1886. 

  1887.         av_log_set_level(AV_LOG_DEBUG);

  1888. 

  1889.         for (i=0; i < FF_ARRAY_ELEMS(options); i++) {

  1890.             av_log(&test_ctx, AV_LOG_DEBUG, "Setting options string '%s'\n", options[i]);

  1891.             if (av_opt_set_from_string(&test_ctx, options[i], shorthand, "=", ":") < 0)

  1892.                 av_log(&test_ctx, AV_LOG_ERROR, "Error setting options string: '%s'\n", options[i]);

  1893.             printf("\n");

  1894.         }

  1895.         av_opt_free(&test_ctx);

  1896.     }

  1897. 

  1898.     return 0;

  1899. }

  1900. 

  1901. #endif