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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_get(void *obj, const char *name, int search_flags, uint8_t **out_val)

  684. {

  685.     void *dst, *target_obj;

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

  687.     uint8_t *bin, buf[128];

  688.     int len, i, ret;

  689.     int64_t i64;

  690. 

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

  692.         return AVERROR_OPTION_NOT_FOUND;

  693. 

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

  695. 

  696.     buf[0] = 0;

  697.     switch (o->type) {

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

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

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

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

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

  703.     case AV_OPT_TYPE_VIDEO_RATE:

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

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

  706.     case AV_OPT_TYPE_STRING:

  707.         if (*(uint8_t**)dst)

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

  709.         else

  710.             *out_val = av_strdup("");

  711.         return 0;

  712.     case AV_OPT_TYPE_BINARY:

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

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

  715.             return AVERROR(EINVAL);

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

  717.             return AVERROR(ENOMEM);

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

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

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

  721.         return 0;

  722.     case AV_OPT_TYPE_IMAGE_SIZE:

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

  724.         break;

  725.     case AV_OPT_TYPE_PIXEL_FMT:

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

  727.         break;

  728.     case AV_OPT_TYPE_SAMPLE_FMT:

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

  730.         break;

  731.     case AV_OPT_TYPE_DURATION:

  732.         i64 = *(int64_t *)dst;

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

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

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

  736.         break;

  737.     case AV_OPT_TYPE_COLOR:

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

  739.         break;

  740.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  741.         i64 = *(int64_t *)dst;

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

  743.         break;

  744.     default:

  745.         return AVERROR(EINVAL);

  746.     }

  747. 

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

  749.         return AVERROR(EINVAL);

  750.     *out_val = av_strdup(buf);

  751.     return 0;

  752. }

  753. 

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

  755.                       int search_flags)

  756. {

  757.     void *dst, *target_obj;

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

  759.     if (!o || !target_obj)

  760.         goto error;

  761. 

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

  763. 

  764.     if (o_out) *o_out= o;

  765. 

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

  767. 

  768. error:

  769.     *den=*intnum=0;

  770.     return -1;

  771. }

  772. 

  773. #if FF_API_OLD_AVOPTIONS

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

  775. {

  776.     int64_t intnum=1;

  777.     double num=1;

  778.     int den=1;

  779. 

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

  781.         return NAN;

  782.     return num*intnum/den;

  783. }

  784. 

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

  786. {

  787.     int64_t intnum=1;

  788.     double num=1;

  789.     int den=1;

  790. 

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

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

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

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

  795.     else

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

  797. }

  798. 

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

  800. {

  801.     int64_t intnum=1;

  802.     double num=1;

  803.     int den=1;

  804. 

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

  806.         return -1;

  807.     return num*intnum/den;

  808. }

  809. #endif

  810. 

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

  812. {

  813.     int64_t intnum = 1;

  814.     double     num = 1;

  815.     int   ret, den = 1;

  816. 

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

  818.         return ret;

  819.     *out_val = num*intnum/den;

  820.     return 0;

  821. }

  822. 

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

  824. {

  825.     int64_t intnum = 1;

  826.     double     num = 1;

  827.     int   ret, den = 1;

  828. 

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

  830.         return ret;

  831.     *out_val = num*intnum/den;

  832.     return 0;

  833. }

  834. 

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

  836. {

  837.     int64_t intnum = 1;

  838.     double     num = 1;

  839.     int   ret, den = 1;

  840. 

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

  842.         return ret;

  843. 

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

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

  846.     else

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

  848.     return 0;

  849. }

  850. 

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

  852. {

  853.     void *dst, *target_obj;

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

  855.     if (!o || !target_obj)

  856.         return AVERROR_OPTION_NOT_FOUND;

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

  858.         av_log(obj, AV_LOG_ERROR,

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

  860.         return AVERROR(EINVAL);

  861.     }

  862. 

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

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

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

  866.     return 0;

  867. }

  868. 

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

  870. {

  871.     int64_t intnum = 1;

  872.     double     num = 1;

  873.     int   ret, den = 1;

  874. 

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

  876.         return ret;

  877. 

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

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

  880.     else

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

  882.     return 0;

  883. }

  884. 

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

  886.                       enum AVOptionType type, const char *desc)

  887. {

  888.     void *dst, *target_obj;

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

  890.     if (!o || !target_obj)

  891.         return AVERROR_OPTION_NOT_FOUND;

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

  893.         av_log(obj, AV_LOG_ERROR,

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

  895.         return AVERROR(EINVAL);

  896.     }

  897. 

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

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

  900.     return 0;

  901. }

  902. 

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

  904. {

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

  906. }

  907. 

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

  909. {

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

  911. }

  912. 

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

  914. {

  915.     void *dst, *target_obj;

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

  917.     if (!o || !target_obj)

  918.         return AVERROR_OPTION_NOT_FOUND;

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

  920.         av_log(obj, AV_LOG_ERROR,

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

  922.         return AVERROR(EINVAL);

  923.     }

  924. 

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

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

  927.     return 0;

  928. }

  929. 

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

  931. {

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

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

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

  935.     int64_t res;

  936. 

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

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

  939.         return 0;

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

  941. }

  942. 

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

  944. {

  945.     if      (d == INT_MAX) {

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  971.     } else {

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

  973.     }

  974. }

  975. 

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

  977.                      int req_flags, int rej_flags)

  978. {

  979.     const AVOption *opt=NULL;

  980.     AVOptionRanges *r;

  981.     int i;

  982. 

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

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

  985.             continue;

  986. 

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

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

  989.          * Only print items from the requested unit.

  990.          */

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

  992.             continue;

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

  994.             continue;

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

  996.             continue;

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

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

  999.         else

  1000.             av_log(av_log_obj, AV_LOG_INFO, "  %s%-17s ",

  1001.                    (opt->flags & AV_OPT_FLAG_FILTERING_PARAM) ? "" : "-",

  1002.                    opt->name);

  1003. 

  1004.         switch (opt->type) {

  1005.             case AV_OPT_TYPE_FLAGS:

  1006.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<flags>");

  1007.                 break;

  1008.             case AV_OPT_TYPE_INT:

  1009.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<int>");

  1010.                 break;

  1011.             case AV_OPT_TYPE_INT64:

  1012.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<int64>");

  1013.                 break;

  1014.             case AV_OPT_TYPE_DOUBLE:

  1015.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<double>");

  1016.                 break;

  1017.             case AV_OPT_TYPE_FLOAT:

  1018.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<float>");

  1019.                 break;

  1020.             case AV_OPT_TYPE_STRING:

  1021.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<string>");

  1022.                 break;

  1023.             case AV_OPT_TYPE_RATIONAL:

  1024.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<rational>");

  1025.                 break;

  1026.             case AV_OPT_TYPE_BINARY:

  1027.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<binary>");

  1028.                 break;

  1029.             case AV_OPT_TYPE_IMAGE_SIZE:

  1030.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<image_size>");

  1031.                 break;

  1032.             case AV_OPT_TYPE_VIDEO_RATE:

  1033.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<video_rate>");

  1034.                 break;

  1035.             case AV_OPT_TYPE_PIXEL_FMT:

  1036.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<pix_fmt>");

  1037.                 break;

  1038.             case AV_OPT_TYPE_SAMPLE_FMT:

  1039.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<sample_fmt>");

  1040.                 break;

  1041.             case AV_OPT_TYPE_DURATION:

  1042.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<duration>");

  1043.                 break;

  1044.             case AV_OPT_TYPE_COLOR:

  1045.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<color>");

  1046.                 break;

  1047.             case AV_OPT_TYPE_CHANNEL_LAYOUT:

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

  1049.                 break;

  1050.             case AV_OPT_TYPE_CONST:

  1051.             default:

  1052.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "");

  1053.                 break;

  1054.         }

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

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

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

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

  1059.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_AUDIO_PARAM   ) ? 'A' : '.');

  1060.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_SUBTITLE_PARAM) ? 'S' : '.');

  1061.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_EXPORT)         ? 'X' : '.');

  1062.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_READONLY)       ? 'R' : '.');

  1063. 

  1064.         if (opt->help)

  1065.             av_log(av_log_obj, AV_LOG_INFO, " %s", opt->help);

  1066. 

  1067.         if (av_opt_query_ranges(&r, obj, opt->name, AV_OPT_SEARCH_FAKE_OBJ) >= 0) {

  1068.             switch (opt->type) {

  1069.             case AV_OPT_TYPE_INT:

  1070.             case AV_OPT_TYPE_INT64:

  1071.             case AV_OPT_TYPE_DOUBLE:

  1072.             case AV_OPT_TYPE_FLOAT:

  1073.             case AV_OPT_TYPE_RATIONAL:

  1074.                 for (i = 0; i < r->nb_ranges; i++) {

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

  1076.                     log_value(av_log_obj, AV_LOG_INFO, r->range[i]->value_min);

  1077.                     av_log(av_log_obj, AV_LOG_INFO, " to ");

  1078.                     log_value(av_log_obj, AV_LOG_INFO, r->range[i]->value_max);

  1079.                     av_log(av_log_obj, AV_LOG_INFO, ")");

  1080.                 }

  1081.                 break;

  1082.             }

  1083.             av_opt_freep_ranges(&r);

  1084.         }

  1085. 

  1086.         if (opt->type != AV_OPT_TYPE_CONST  &&

  1087.             opt->type != AV_OPT_TYPE_BINARY &&

  1088.                 !((opt->type == AV_OPT_TYPE_COLOR      ||

  1089.                    opt->type == AV_OPT_TYPE_IMAGE_SIZE ||

  1090.                    opt->type == AV_OPT_TYPE_STRING     ||

  1091.                    opt->type == AV_OPT_TYPE_VIDEO_RATE) &&

  1092.                   !opt->default_val.str)) {

  1093.             av_log(av_log_obj, AV_LOG_INFO, " (default ");

  1094.             switch (opt->type) {

  1095.             case AV_OPT_TYPE_FLAGS:

  1096.                 av_log(av_log_obj, AV_LOG_INFO, "%"PRIX64, opt->default_val.i64);

  1097.                 break;

  1098.             case AV_OPT_TYPE_DURATION:

  1099.             case AV_OPT_TYPE_INT:

  1100.             case AV_OPT_TYPE_INT64:

  1101.                 log_value(av_log_obj, AV_LOG_INFO, opt->default_val.i64);

  1102.                 break;

  1103.             case AV_OPT_TYPE_DOUBLE:

  1104.             case AV_OPT_TYPE_FLOAT:

  1105.                 log_value(av_log_obj, AV_LOG_INFO, opt->default_val.dbl);

  1106.                 break;

  1107.             case AV_OPT_TYPE_RATIONAL: {

  1108.                 AVRational q = av_d2q(opt->default_val.dbl, INT_MAX);

  1109.                 av_log(av_log_obj, AV_LOG_INFO, "%d/%d", q.num, q.den); }

  1110.                 break;

  1111.             case AV_OPT_TYPE_PIXEL_FMT:

  1112.                 av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(av_get_pix_fmt_name(opt->default_val.i64), "none"));

  1113.                 break;

  1114.             case AV_OPT_TYPE_SAMPLE_FMT:

  1115.                 av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(av_get_sample_fmt_name(opt->default_val.i64), "none"));

  1116.                 break;

  1117.             case AV_OPT_TYPE_COLOR:

  1118.             case AV_OPT_TYPE_IMAGE_SIZE:

  1119.             case AV_OPT_TYPE_STRING:

  1120.             case AV_OPT_TYPE_VIDEO_RATE:

  1121.                 av_log(av_log_obj, AV_LOG_INFO, "\"%s\"", opt->default_val.str);

  1122.                 break;

  1123.             case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1124.                 av_log(av_log_obj, AV_LOG_INFO, "0x%"PRIx64, opt->default_val.i64);

  1125.                 break;

  1126.             }

  1127.             av_log(av_log_obj, AV_LOG_INFO, ")");

  1128.         }

  1129. 

  1130.         av_log(av_log_obj, AV_LOG_INFO, "\n");

  1131.         if (opt->unit && opt->type != AV_OPT_TYPE_CONST) {

  1132.             opt_list(obj, av_log_obj, opt->unit, req_flags, rej_flags);

  1133.         }

  1134.     }

  1135. }

  1136. 

  1137. int av_opt_show2(void *obj, void *av_log_obj, int req_flags, int rej_flags)

  1138. {

  1139.     if (!obj)

  1140.         return -1;

  1141. 

  1142.     av_log(av_log_obj, AV_LOG_INFO, "%s AVOptions:\n", (*(AVClass**)obj)->class_name);

  1143. 

  1144.     opt_list(obj, av_log_obj, NULL, req_flags, rej_flags);

  1145. 

  1146.     return 0;

  1147. }

  1148. 

  1149. void av_opt_set_defaults(void *s)

  1150. {

  1151. #if FF_API_OLD_AVOPTIONS

  1152.     av_opt_set_defaults2(s, 0, 0);

  1153. }

  1154. 

  1155. void av_opt_set_defaults2(void *s, int mask, int flags)

  1156. {

  1157. #endif

  1158.     const AVClass *class = *(AVClass **)s;

  1159.     const AVOption *opt = NULL;

  1160.     while ((opt = av_opt_next(s, opt)) != NULL) {

  1161.         void *dst = ((uint8_t*)s) + opt->offset;

  1162. #if FF_API_OLD_AVOPTIONS

  1163.         if ((opt->flags & mask) != flags)

  1164.             continue;

  1165. #endif

  1166. 

  1167.         if (opt->flags & AV_OPT_FLAG_READONLY)

  1168.             continue;

  1169. 

  1170.         switch (opt->type) {

  1171.             case AV_OPT_TYPE_CONST:

  1172.                 /* Nothing to be done here */

  1173.             break;

  1174.             case AV_OPT_TYPE_FLAGS:

  1175.             case AV_OPT_TYPE_INT:

  1176.             case AV_OPT_TYPE_INT64:

  1177.             case AV_OPT_TYPE_DURATION:

  1178.             case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1179.                 write_number(s, opt, dst, 1, 1, opt->default_val.i64);

  1180.             break;

  1181.             case AV_OPT_TYPE_DOUBLE:

  1182.             case AV_OPT_TYPE_FLOAT: {

  1183.                 double val;

  1184.                 val = opt->default_val.dbl;

  1185.                 write_number(s, opt, dst, val, 1, 1);

  1186.             }

  1187.             break;

  1188.             case AV_OPT_TYPE_RATIONAL: {

  1189.                 AVRational val;

  1190.                 val = av_d2q(opt->default_val.dbl, INT_MAX);

  1191.                 write_number(s, opt, dst, 1, val.den, val.num);

  1192.             }

  1193.             break;

  1194.             case AV_OPT_TYPE_COLOR:

  1195.                 set_string_color(s, opt, opt->default_val.str, dst);

  1196.                 break;

  1197.             case AV_OPT_TYPE_STRING:

  1198.                 set_string(s, opt, opt->default_val.str, dst);

  1199.                 break;

  1200.             case AV_OPT_TYPE_IMAGE_SIZE:

  1201.                 set_string_image_size(s, opt, opt->default_val.str, dst);

  1202.                 break;

  1203.             case AV_OPT_TYPE_VIDEO_RATE:

  1204.                 set_string_video_rate(s, opt, opt->default_val.str, dst);

  1205.                 break;

  1206.             case AV_OPT_TYPE_PIXEL_FMT:

  1207. #if LIBAVUTIL_VERSION_MAJOR < 54

  1208.                 if (class->version && class->version < AV_VERSION_INT(52, 10, 100))

  1209.                     av_opt_set(s, opt->name, opt->default_val.str, 0);

  1210.                 else

  1211. #endif

  1212.                     write_number(s, opt, dst, 1, 1, opt->default_val.i64);

  1213.                 break;

  1214.             case AV_OPT_TYPE_SAMPLE_FMT:

  1215. #if LIBAVUTIL_VERSION_MAJOR < 54

  1216.                 if (class->version && class->version < AV_VERSION_INT(52, 10, 100))

  1217.                     av_opt_set(s, opt->name, opt->default_val.str, 0);

  1218.                 else

  1219. #endif

  1220.                     write_number(s, opt, dst, 1, 1, opt->default_val.i64);

  1221.                 break;

  1222.             case AV_OPT_TYPE_BINARY:

  1223.                 /* Cannot set default for binary */

  1224.             break;

  1225.             default:

  1226.                 av_log(s, AV_LOG_DEBUG, "AVOption type %d of option %s not implemented yet\n", opt->type, opt->name);

  1227.         }

  1228.     }

  1229. }

  1230. 

  1231. /**

  1232.  * Store the value in the field in ctx that is named like key.

  1233.  * ctx must be an AVClass context, storing is done using AVOptions.

  1234.  *

  1235.  * @param buf the string to parse, buf will be updated to point at the

  1236.  * separator just after the parsed key/value pair

  1237.  * @param key_val_sep a 0-terminated list of characters used to

  1238.  * separate key from value

  1239.  * @param pairs_sep a 0-terminated list of characters used to separate

  1240.  * two pairs from each other

  1241.  * @return 0 if the key/value pair has been successfully parsed and

  1242.  * set, or a negative value corresponding to an AVERROR code in case

  1243.  * of error:

  1244.  * AVERROR(EINVAL) if the key/value pair cannot be parsed,

  1245.  * the error code issued by av_opt_set() if the key/value pair

  1246.  * cannot be set

  1247.  */

  1248. static int parse_key_value_pair(void *ctx, const char **buf,

  1249.                                 const char *key_val_sep, const char *pairs_sep)

  1250. {

  1251.     char *key = av_get_token(buf, key_val_sep);

  1252.     char *val;

  1253.     int ret;

  1254. 

  1255.     if (!key)

  1256.         return AVERROR(ENOMEM);

  1257. 

  1258.     if (*key && strspn(*buf, key_val_sep)) {

  1259.         (*buf)++;

  1260.         val = av_get_token(buf, pairs_sep);

  1261.         if (!val) {

  1262.             av_freep(&key);

  1263.             return AVERROR(ENOMEM);

  1264.         }

  1265.     } else {

  1266.         av_log(ctx, AV_LOG_ERROR, "Missing key or no key/value separator found after key '%s'\n", key);

  1267.         av_free(key);

  1268.         return AVERROR(EINVAL);

  1269.     }

  1270. 

  1271.     av_log(ctx, AV_LOG_DEBUG, "Setting entry with key '%s' to value '%s'\n", key, val);

  1272. 

  1273.     ret = av_opt_set(ctx, key, val, AV_OPT_SEARCH_CHILDREN);

  1274.     if (ret == AVERROR_OPTION_NOT_FOUND)

  1275.         av_log(ctx, AV_LOG_ERROR, "Key '%s' not found.\n", key);

  1276. 

  1277.     av_free(key);

  1278.     av_free(val);

  1279.     return ret;

  1280. }

  1281. 

  1282. int av_set_options_string(void *ctx, const char *opts,

  1283.                           const char *key_val_sep, const char *pairs_sep)

  1284. {

  1285.     int ret, count = 0;

  1286. 

  1287.     if (!opts)

  1288.         return 0;

  1289. 

  1290.     while (*opts) {

  1291.         if ((ret = parse_key_value_pair(ctx, &opts, key_val_sep, pairs_sep)) < 0)

  1292.             return ret;

  1293.         count++;

  1294. 

  1295.         if (*opts)

  1296.             opts++;

  1297.     }

  1298. 

  1299.     return count;

  1300. }

  1301. 

  1302. #define WHITESPACES " \n\t"

  1303. 

  1304. static int is_key_char(char c)

  1305. {

  1306.     return (unsigned)((c | 32) - 'a') < 26 ||

  1307.            (unsigned)(c - '0') < 10 ||

  1308.            c == '-' || c == '_' || c == '/' || c == '.';

  1309. }

  1310. 

  1311. /**

  1312.  * Read a key from a string.

  1313.  *

  1314.  * The key consists of is_key_char characters and must be terminated by a

  1315.  * character from the delim string; spaces are ignored.

  1316.  *

  1317.  * @return  0 for success (even with ellipsis), <0 for failure

  1318.  */

  1319. static int get_key(const char **ropts, const char *delim, char **rkey)

  1320. {

  1321.     const char *opts = *ropts;

  1322.     const char *key_start, *key_end;

  1323. 

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

  1325.     while (is_key_char(*opts))

  1326.         opts++;

  1327.     key_end = opts;

  1328.     opts += strspn(opts, WHITESPACES);

  1329.     if (!*opts || !strchr(delim, *opts))

  1330.         return AVERROR(EINVAL);

  1331.     opts++;

  1332.     if (!(*rkey = av_malloc(key_end - key_start + 1)))

  1333.         return AVERROR(ENOMEM);

  1334.     memcpy(*rkey, key_start, key_end - key_start);

  1335.     (*rkey)[key_end - key_start] = 0;

  1336.     *ropts = opts;

  1337.     return 0;

  1338. }

  1339. 

  1340. int av_opt_get_key_value(const char **ropts,

  1341.                          const char *key_val_sep, const char *pairs_sep,

  1342.                          unsigned flags,

  1343.                          char **rkey, char **rval)

  1344. {

  1345.     int ret;

  1346.     char *key = NULL, *val;

  1347.     const char *opts = *ropts;

  1348. 

  1349.     if ((ret = get_key(&opts, key_val_sep, &key)) < 0 &&

  1350.         !(flags & AV_OPT_FLAG_IMPLICIT_KEY))

  1351.         return AVERROR(EINVAL);

  1352.     if (!(val = av_get_token(&opts, pairs_sep))) {

  1353.         av_free(key);

  1354.         return AVERROR(ENOMEM);

  1355.     }

  1356.     *ropts = opts;

  1357.     *rkey  = key;

  1358.     *rval  = val;

  1359.     return 0;

  1360. }

  1361. 

  1362. int av_opt_set_from_string(void *ctx, const char *opts,

  1363.                            const char *const *shorthand,

  1364.                            const char *key_val_sep, const char *pairs_sep)

  1365. {

  1366.     int ret, count = 0;

  1367.     const char *dummy_shorthand = NULL;

  1368.     char *av_uninit(parsed_key), *av_uninit(value);

  1369.     const char *key;

  1370. 

  1371.     if (!opts)

  1372.         return 0;

  1373.     if (!shorthand)

  1374.         shorthand = &dummy_shorthand;

  1375. 

  1376.     while (*opts) {

  1377.         ret = av_opt_get_key_value(&opts, key_val_sep, pairs_sep,

  1378.                                    *shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,

  1379.                                    &parsed_key, &value);

  1380.         if (ret < 0) {

  1381.             if (ret == AVERROR(EINVAL))

  1382.                 av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", opts);

  1383.             else

  1384.                 av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", opts,

  1385.                        av_err2str(ret));

  1386.             return ret;

  1387.         }

  1388.         if (*opts)

  1389.             opts++;

  1390.         if (parsed_key) {

  1391.             key = parsed_key;

  1392.             while (*shorthand) /* discard all remaining shorthand */

  1393.                 shorthand++;

  1394.         } else {

  1395.             key = *(shorthand++);

  1396.         }

  1397. 

  1398.         av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);

  1399.         if ((ret = av_opt_set(ctx, key, value, 0)) < 0) {

  1400.             if (ret == AVERROR_OPTION_NOT_FOUND)

  1401.                 av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);

  1402.             av_free(value);

  1403.             av_free(parsed_key);

  1404.             return ret;

  1405.         }

  1406. 

  1407.         av_free(value);

  1408.         av_free(parsed_key);

  1409.         count++;

  1410.     }

  1411.     return count;

  1412. }

  1413. 

  1414. void av_opt_free(void *obj)

  1415. {

  1416.     const AVOption *o = NULL;

  1417.     while ((o = av_opt_next(obj, o)))

  1418.         if (o->type == AV_OPT_TYPE_STRING || o->type == AV_OPT_TYPE_BINARY)

  1419.             av_freep((uint8_t *)obj + o->offset);

  1420. }

  1421. 

  1422. int av_opt_set_dict2(void *obj, AVDictionary **options, int search_flags)

  1423. {

  1424.     AVDictionaryEntry *t = NULL;

  1425.     AVDictionary    *tmp = NULL;

  1426.     int ret = 0;

  1427. 

  1428.     if (!options)

  1429.         return 0;

  1430. 

  1431.     while ((t = av_dict_get(*options, "", t, AV_DICT_IGNORE_SUFFIX))) {

  1432.         ret = av_opt_set(obj, t->key, t->value, search_flags);

  1433.         if (ret == AVERROR_OPTION_NOT_FOUND)

  1434.             av_dict_set(&tmp, t->key, t->value, 0);

  1435.         else if (ret < 0) {

  1436.             av_log(obj, AV_LOG_ERROR, "Error setting option %s to value %s.\n", t->key, t->value);

  1437.             break;

  1438.         }

  1439.         ret = 0;

  1440.     }

  1441.     av_dict_free(options);

  1442.     *options = tmp;

  1443.     return ret;

  1444. }

  1445. 

  1446. int av_opt_set_dict(void *obj, AVDictionary **options)

  1447. {

  1448.     return av_opt_set_dict2(obj, options, 0);

  1449. }

  1450. 

  1451. const AVOption *av_opt_find(void *obj, const char *name, const char *unit,

  1452.                             int opt_flags, int search_flags)

  1453. {

  1454.     return av_opt_find2(obj, name, unit, opt_flags, search_flags, NULL);

  1455. }

  1456. 

  1457. const AVOption *av_opt_find2(void *obj, const char *name, const char *unit,

  1458.                              int opt_flags, int search_flags, void **target_obj)

  1459. {

  1460.     const AVClass  *c;

  1461.     const AVOption *o = NULL;

  1462. 

  1463.     if(!obj)

  1464.         return NULL;

  1465. 

  1466.     c= *(AVClass**)obj;

  1467. 

  1468.     if (!c)

  1469.         return NULL;

  1470. 

  1471.     if (search_flags & AV_OPT_SEARCH_CHILDREN) {

  1472.         if (search_flags & AV_OPT_SEARCH_FAKE_OBJ) {

  1473.             const AVClass *child = NULL;

  1474.             while (child = av_opt_child_class_next(c, child))

  1475.                 if (o = av_opt_find2(&child, name, unit, opt_flags, search_flags, NULL))

  1476.                     return o;

  1477.         } else {

  1478.             void *child = NULL;

  1479.             while (child = av_opt_child_next(obj, child))

  1480.                 if (o = av_opt_find2(child, name, unit, opt_flags, search_flags, target_obj))

  1481.                     return o;

  1482.         }

  1483.     }

  1484. 

  1485.     while (o = av_opt_next(obj, o)) {

  1486.         if (!strcmp(o->name, name) && (o->flags & opt_flags) == opt_flags &&

  1487.             ((!unit && o->type != AV_OPT_TYPE_CONST) ||

  1488.              (unit  && o->type == AV_OPT_TYPE_CONST && o->unit && !strcmp(o->unit, unit)))) {

  1489.             if (target_obj) {

  1490.                 if (!(search_flags & AV_OPT_SEARCH_FAKE_OBJ))

  1491.                     *target_obj = obj;

  1492.                 else

  1493.                     *target_obj = NULL;

  1494.             }

  1495.             return o;

  1496.         }

  1497.     }

  1498.     return NULL;

  1499. }

  1500. 

  1501. void *av_opt_child_next(void *obj, void *prev)

  1502. {

  1503.     const AVClass *c = *(AVClass**)obj;

  1504.     if (c->child_next)

  1505.         return c->child_next(obj, prev);

  1506.     return NULL;

  1507. }

  1508. 

  1509. const AVClass *av_opt_child_class_next(const AVClass *parent, const AVClass *prev)

  1510. {

  1511.     if (parent->child_class_next)

  1512.         return parent->child_class_next(prev);

  1513.     return NULL;

  1514. }

  1515. 

  1516. void *av_opt_ptr(const AVClass *class, void *obj, const char *name)

  1517. {

  1518.     const AVOption *opt= av_opt_find2(&class, name, NULL, 0, AV_OPT_SEARCH_FAKE_OBJ, NULL);

  1519.     if(!opt)

  1520.         return NULL;

  1521.     return (uint8_t*)obj + opt->offset;

  1522. }

  1523. 

  1524. static int opt_size(enum AVOptionType type)

  1525. {

  1526.     switch(type) {

  1527.     case AV_OPT_TYPE_INT:

  1528.     case AV_OPT_TYPE_FLAGS:     return sizeof(int);

  1529.     case AV_OPT_TYPE_DURATION:

  1530.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1531.     case AV_OPT_TYPE_INT64:     return sizeof(int64_t);

  1532.     case AV_OPT_TYPE_DOUBLE:    return sizeof(double);

  1533.     case AV_OPT_TYPE_FLOAT:     return sizeof(float);

  1534.     case AV_OPT_TYPE_STRING:    return sizeof(uint8_t*);

  1535.     case AV_OPT_TYPE_VIDEO_RATE:

  1536.     case AV_OPT_TYPE_RATIONAL:  return sizeof(AVRational);

  1537.     case AV_OPT_TYPE_BINARY:    return sizeof(uint8_t*) + sizeof(int);

  1538.     case AV_OPT_TYPE_IMAGE_SIZE:return sizeof(int[2]);

  1539.     case AV_OPT_TYPE_PIXEL_FMT: return sizeof(enum AVPixelFormat);

  1540.     case AV_OPT_TYPE_SAMPLE_FMT:return sizeof(enum AVSampleFormat);

  1541.     case AV_OPT_TYPE_COLOR:     return 4;

  1542.     }

  1543.     return 0;

  1544. }

  1545. 

  1546. int av_opt_copy(void *dst, void *src)

  1547. {

  1548.     const AVOption *o = NULL;

  1549.     const AVClass *c;

  1550.     int ret = 0;

  1551. 

  1552.     if (!src)

  1553.         return 0;

  1554. 

  1555.     c = *(AVClass**)src;

  1556.     if (*(AVClass**)dst && c != *(AVClass**)dst)

  1557.         return AVERROR(EINVAL);

  1558. 

  1559.     while ((o = av_opt_next(src, o))) {

  1560.         void *field_dst = ((uint8_t*)dst) + o->offset;

  1561.         void *field_src = ((uint8_t*)src) + o->offset;

  1562.         uint8_t **field_dst8 = (uint8_t**)field_dst;

  1563.         uint8_t **field_src8 = (uint8_t**)field_src;

  1564. 

  1565.         if (o->type == AV_OPT_TYPE_STRING) {

  1566.             if (*field_dst8 != *field_src8)

  1567.                 av_freep(field_dst8);

  1568.             *field_dst8 = av_strdup(*field_src8);

  1569.             if (*field_src8 && !*field_dst8)

  1570.                 ret = AVERROR(ENOMEM);

  1571.         } else if (o->type == AV_OPT_TYPE_BINARY) {

  1572.             int len = *(int*)(field_src8 + 1);

  1573.             if (*field_dst8 != *field_src8)

  1574.                 av_freep(field_dst8);

  1575.             *field_dst8 = av_memdup(*field_src8, len);

  1576.             if (len && !*field_dst8) {

  1577.                 ret = AVERROR(ENOMEM);

  1578.                 len = 0;

  1579.             }

  1580.             *(int*)(field_dst8 + 1) = len;

  1581.         } else if (o->type == AV_OPT_TYPE_CONST) {

  1582.             // do nothing

  1583.         } else {

  1584.             memcpy(field_dst, field_src, opt_size(o->type));

  1585.         }

  1586.     }

  1587.     return ret;

  1588. }

  1589. 

  1590. int av_opt_query_ranges(AVOptionRanges **ranges_arg, void *obj, const char *key, int flags)

  1591. {

  1592.     int ret;

  1593.     const AVClass *c = *(AVClass**)obj;

  1594.     int (*callback)(AVOptionRanges **, void *obj, const char *key, int flags) = NULL;

  1595. 

  1596.     if (c->version > (52 << 16 | 11 << 8))

  1597.         callback = c->query_ranges;

  1598. 

  1599.     if (!callback)

  1600.         callback = av_opt_query_ranges_default;

  1601. 

  1602.     ret = callback(ranges_arg, obj, key, flags);

  1603.     if (ret >= 0) {

  1604.         if (!(flags & AV_OPT_MULTI_COMPONENT_RANGE))

  1605.             ret = 1;

  1606.         (*ranges_arg)->nb_components = ret;

  1607.     }

  1608.     return ret;

  1609. }

  1610. 

  1611. int av_opt_query_ranges_default(AVOptionRanges **ranges_arg, void *obj, const char *key, int flags)

  1612. {

  1613.     AVOptionRanges *ranges = av_mallocz(sizeof(*ranges));

  1614.     AVOptionRange **range_array = av_mallocz(sizeof(void*));

  1615.     AVOptionRange *range = av_mallocz(sizeof(*range));

  1616.     const AVOption *field = av_opt_find(obj, key, NULL, 0, flags);

  1617.     int ret;

  1618. 

  1619.     *ranges_arg = NULL;

  1620. 

  1621.     if (!ranges || !range || !range_array || !field) {

  1622.         ret = AVERROR(ENOMEM);

  1623.         goto fail;

  1624.     }

  1625. 

  1626.     ranges->range = range_array;

  1627.     ranges->range[0] = range;

  1628.     ranges->nb_ranges = 1;

  1629.     ranges->nb_components = 1;

  1630.     range->is_range = 1;

  1631.     range->value_min = field->min;

  1632.     range->value_max = field->max;

  1633. 

  1634.     switch (field->type) {

  1635.     case AV_OPT_TYPE_INT:

  1636.     case AV_OPT_TYPE_INT64:

  1637.     case AV_OPT_TYPE_PIXEL_FMT:

  1638.     case AV_OPT_TYPE_SAMPLE_FMT:

  1639.     case AV_OPT_TYPE_FLOAT:

  1640.     case AV_OPT_TYPE_DOUBLE:

  1641.     case AV_OPT_TYPE_DURATION:

  1642.     case AV_OPT_TYPE_COLOR:

  1643.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1644.         break;

  1645.     case AV_OPT_TYPE_STRING:

  1646.         range->component_min = 0;

  1647.         range->component_max = 0x10FFFF; // max unicode value

  1648.         range->value_min = -1;

  1649.         range->value_max = INT_MAX;

  1650.         break;

  1651.     case AV_OPT_TYPE_RATIONAL:

  1652.         range->component_min = INT_MIN;

  1653.         range->component_max = INT_MAX;

  1654.         break;

  1655.     case AV_OPT_TYPE_IMAGE_SIZE:

  1656.         range->component_min = 0;

  1657.         range->component_max = INT_MAX/128/8;

  1658.         range->value_min = 0;

  1659.         range->value_max = INT_MAX/8;

  1660.         break;

  1661.     case AV_OPT_TYPE_VIDEO_RATE:

  1662.         range->component_min = 1;

  1663.         range->component_max = INT_MAX;

  1664.         range->value_min = 1;

  1665.         range->value_max = INT_MAX;

  1666.         break;

  1667.     default:

  1668.         ret = AVERROR(ENOSYS);

  1669.         goto fail;

  1670.     }

  1671. 

  1672.     *ranges_arg = ranges;

  1673.     return 1;

  1674. fail:

  1675.     av_free(ranges);

  1676.     av_free(range);

  1677.     av_free(range_array);

  1678.     return ret;

  1679. }

  1680. 

  1681. void av_opt_freep_ranges(AVOptionRanges **rangesp)

  1682. {

  1683.     int i;

  1684.     AVOptionRanges *ranges = *rangesp;

  1685. 

  1686.     if (!ranges)

  1687.         return;

  1688. 

  1689.     for (i = 0; i < ranges->nb_ranges * ranges->nb_components; i++) {

  1690.         AVOptionRange *range = ranges->range[i];

  1691.         if (range) {

  1692.             av_freep(&range->str);

  1693.             av_freep(&ranges->range[i]);

  1694.         }

  1695.     }

  1696.     av_freep(&ranges->range);

  1697.     av_freep(rangesp);

  1698. }

  1699. 

  1700. #ifdef TEST

  1701. 

  1702. typedef struct TestContext

  1703. {

  1704.     const AVClass *class;

  1705.     int num;

  1706.     int toggle;

  1707.     char *string;

  1708.     int flags;

  1709.     AVRational rational;

  1710.     AVRational video_rate;

  1711.     int w, h;

  1712.     enum AVPixelFormat pix_fmt;

  1713.     enum AVSampleFormat sample_fmt;

  1714.     int64_t duration;

  1715.     uint8_t color[4];

  1716.     int64_t channel_layout;

  1717. } TestContext;

  1718. 

  1719. #define OFFSET(x) offsetof(TestContext, x)

  1720. 

  1721. #define TEST_FLAG_COOL 01

  1722. #define TEST_FLAG_LAME 02

  1723. #define TEST_FLAG_MU   04

  1724. 

  1725. static const AVOption test_options[]= {

  1726. {"num",      "set num",        OFFSET(num),      AV_OPT_TYPE_INT,      {.i64 = 0},       0,        100                 },

  1727. {"toggle",   "set toggle",     OFFSET(toggle),   AV_OPT_TYPE_INT,      {.i64 = 0},       0,        1                   },

  1728. {"rational", "set rational",   OFFSET(rational), AV_OPT_TYPE_RATIONAL, {.dbl = 0},       0,        10                  },

  1729. {"string",   "set string",     OFFSET(string),   AV_OPT_TYPE_STRING,   {.str = "default"}, CHAR_MIN, CHAR_MAX          },

  1730. {"flags",    "set flags",      OFFSET(flags),    AV_OPT_TYPE_FLAGS,    {.i64 = 0},       0,        INT_MAX, 0, "flags" },

  1731. {"cool",     "set cool flag ", 0,                AV_OPT_TYPE_CONST,    {.i64 = TEST_FLAG_COOL}, INT_MIN,  INT_MAX, 0, "flags" },

  1732. {"lame",     "set lame flag ", 0,                AV_OPT_TYPE_CONST,    {.i64 = TEST_FLAG_LAME}, INT_MIN,  INT_MAX, 0, "flags" },

  1733. {"mu",       "set mu flag ",   0,                AV_OPT_TYPE_CONST,    {.i64 = TEST_FLAG_MU},   INT_MIN,  INT_MAX, 0, "flags" },

  1734. {"size",     "set size",       OFFSET(w),        AV_OPT_TYPE_IMAGE_SIZE,{0},             0,        0                   },

  1735. {"pix_fmt",  "set pixfmt",     OFFSET(pix_fmt),  AV_OPT_TYPE_PIXEL_FMT, {.i64 = AV_PIX_FMT_NONE}, -1, INT_MAX},

  1736. {"sample_fmt", "set samplefmt", OFFSET(sample_fmt), AV_OPT_TYPE_SAMPLE_FMT, {.i64 = AV_SAMPLE_FMT_NONE}, -1, INT_MAX},

  1737. {"video_rate", "set videorate", OFFSET(video_rate), AV_OPT_TYPE_VIDEO_RATE,  {.str = "25"}, 0,     0                   },

  1738. {"duration", "set duration",   OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, INT64_MAX},

  1739. {"color", "set color",   OFFSET(color), AV_OPT_TYPE_COLOR, {.str = "pink"}, 0, 0},

  1740. {"cl", "set channel layout", OFFSET(channel_layout), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64 = AV_CH_LAYOUT_HEXAGONAL}, 0, INT64_MAX},

  1741. {NULL},

  1742. };

  1743. 

  1744. static const char *test_get_name(void *ctx)

  1745. {

  1746.     return "test";

  1747. }

  1748. 

  1749. static const AVClass test_class = {

  1750.     "TestContext",

  1751.     test_get_name,

  1752.     test_options

  1753. };

  1754. 

  1755. int main(void)

  1756. {

  1757.     int i;

  1758. 

  1759.     printf("\nTesting av_set_options_string()\n");

  1760.     {

  1761.         TestContext test_ctx = { 0 };

  1762.         static const char * const options[] = {

  1763.             "",

  1764.             ":",

  1765.             "=",

  1766.             "foo=:",

  1767.             ":=foo",

  1768.             "=foo",

  1769.             "foo=",

  1770.             "foo",

  1771.             "foo=val",

  1772.             "foo==val",

  1773.             "toggle=:",

  1774.             "string=:",

  1775.             "toggle=1 : foo",

  1776.             "toggle=100",

  1777.             "toggle==1",

  1778.             "flags=+mu-lame : num=42: toggle=0",

  1779.             "num=42 : string=blahblah",

  1780.             "rational=0 : rational=1/2 : rational=1/-1",

  1781.             "rational=-1/0",

  1782.             "size=1024x768",

  1783.             "size=pal",

  1784.             "size=bogus",

  1785.             "pix_fmt=yuv420p",

  1786.             "pix_fmt=2",

  1787.             "pix_fmt=bogus",

  1788.             "sample_fmt=s16",

  1789.             "sample_fmt=2",

  1790.             "sample_fmt=bogus",

  1791.             "video_rate=pal",

  1792.             "video_rate=25",

  1793.             "video_rate=30000/1001",

  1794.             "video_rate=30/1.001",

  1795.             "video_rate=bogus",

  1796.             "duration=bogus",

  1797.             "duration=123.45",

  1798.             "duration=1\\:23\\:45.67",

  1799.             "color=blue",

  1800.             "color=0x223300",

  1801.             "color=0x42FF07AA",

  1802.             "cl=stereo+downmix",

  1803.             "cl=foo",

  1804.         };

  1805. 

  1806.         test_ctx.class = &test_class;

  1807.         av_opt_set_defaults(&test_ctx);

  1808. 

  1809.         av_log_set_level(AV_LOG_DEBUG);

  1810. 

  1811.         for (i=0; i < FF_ARRAY_ELEMS(options); i++) {

  1812.             av_log(&test_ctx, AV_LOG_DEBUG, "Setting options string '%s'\n", options[i]);

  1813.             if (av_set_options_string(&test_ctx, options[i], "=", ":") < 0)

  1814.                 av_log(&test_ctx, AV_LOG_ERROR, "Error setting options string: '%s'\n", options[i]);

  1815.             printf("\n");

  1816.         }

  1817.         av_opt_free(&test_ctx);

  1818.     }

  1819. 

  1820.     printf("\nTesting av_opt_set_from_string()\n");

  1821.     {

  1822.         TestContext test_ctx = { 0 };

  1823.         static const char * const options[] = {

  1824.             "",

  1825.             "5",

  1826.             "5:hello",

  1827.             "5:hello:size=pal",

  1828.             "5:size=pal:hello",

  1829.             ":",

  1830.             "=",

  1831.             " 5 : hello : size = pal ",

  1832.             "a_very_long_option_name_that_will_need_to_be_ellipsized_around_here=42"

  1833.         };

  1834.         static const char * const shorthand[] = { "num", "string", NULL };

  1835. 

  1836.         test_ctx.class = &test_class;

  1837.         av_opt_set_defaults(&test_ctx);

  1838. 

  1839.         av_log_set_level(AV_LOG_DEBUG);

  1840. 

  1841.         for (i=0; i < FF_ARRAY_ELEMS(options); i++) {

  1842.             av_log(&test_ctx, AV_LOG_DEBUG, "Setting options string '%s'\n", options[i]);

  1843.             if (av_opt_set_from_string(&test_ctx, options[i], shorthand, "=", ":") < 0)

  1844.                 av_log(&test_ctx, AV_LOG_ERROR, "Error setting options string: '%s'\n", options[i]);

  1845.             printf("\n");

  1846.         }

  1847.         av_opt_free(&test_ctx);

  1848.     }

  1849. 

  1850.     return 0;

  1851. }

  1852. 

  1853. #endif