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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. 

  587.     if (!o || !target_obj)

  588.         return AVERROR_OPTION_NOT_FOUND;

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

  590.         av_log(obj, AV_LOG_ERROR,

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

  592.         return AVERROR(EINVAL);

  593.     }

  594. 

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

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

  597. 

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

  599.         av_log(obj, AV_LOG_ERROR,

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

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

  602.         return AVERROR(ERANGE);

  603.     }

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

  605.     return 0;

  606. }

  607. 

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

  609. {

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

  611. }

  612. 

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

  614. {

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

  616. }

  617. 

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

  619. {

  620.     void *target_obj;

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

  622. 

  623.     if (!o || !target_obj)

  624.         return AVERROR_OPTION_NOT_FOUND;

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

  626.         av_log(obj, AV_LOG_ERROR,

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

  628.         return AVERROR(EINVAL);

  629.     }

  630.     *(int64_t *)(((uint8_t *)target_obj) + o->offset) = cl;

  631.     return 0;

  632. }

  633. 

  634. #if FF_API_OLD_AVOPTIONS

  635. /**

  636.  *

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

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

  639.  */

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

  641. {

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

  643.     void *dst;

  644.     uint8_t *bin;

  645.     int len, i;

  646.     if (!o)

  647.         return NULL;

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

  649.         return NULL;

  650. 

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

  652.     if (o_out) *o_out= o;

  653. 

  654.     switch (o->type) {

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

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

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

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

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

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

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

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

  663.     case AV_OPT_TYPE_BINARY:

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

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

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

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

  668.         break;

  669.     default: return NULL;

  670.     }

  671.     return buf;

  672. }

  673. #endif

  674. 

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

  676. {

  677.     void *target_obj;

  678.     AVDictionary **dst;

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

  680. 

  681.     if (!o || !target_obj)

  682.         return AVERROR_OPTION_NOT_FOUND;

  683.     if (o->flags & AV_OPT_FLAG_READONLY)

  684.         return AVERROR(EINVAL);

  685. 

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

  687.     av_dict_free(dst);

  688.     av_dict_copy(dst, val, 0);

  689. 

  690.     return 0;

  691. }

  692. 

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

  694. {

  695.     void *dst, *target_obj;

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

  697.     uint8_t *bin, buf[128];

  698.     int len, i, ret;

  699.     int64_t i64;

  700. 

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

  702.         return AVERROR_OPTION_NOT_FOUND;

  703. 

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

  705. 

  706.     buf[0] = 0;

  707.     switch (o->type) {

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

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

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

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

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

  713.     case AV_OPT_TYPE_VIDEO_RATE:

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

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

  716.     case AV_OPT_TYPE_STRING:

  717.         if (*(uint8_t**)dst)

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

  719.         else

  720.             *out_val = av_strdup("");

  721.         return 0;

  722.     case AV_OPT_TYPE_BINARY:

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

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

  725.             return AVERROR(EINVAL);

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

  727.             return AVERROR(ENOMEM);

  728.         if (!len) {

  729.             *out_val[0] = '\0';

  730.             return 0;

  731.         }

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

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

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

  735.         return 0;

  736.     case AV_OPT_TYPE_IMAGE_SIZE:

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

  738.         break;

  739.     case AV_OPT_TYPE_PIXEL_FMT:

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

  741.         break;

  742.     case AV_OPT_TYPE_SAMPLE_FMT:

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

  744.         break;

  745.     case AV_OPT_TYPE_DURATION:

  746.         i64 = *(int64_t *)dst;

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

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

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

  750.         break;

  751.     case AV_OPT_TYPE_COLOR:

  752.         ret = snprintf(buf, sizeof(buf), "0x%02x%02x%02x%02x",

  753.                        (int)((uint8_t *)dst)[0], (int)((uint8_t *)dst)[1],

  754.                        (int)((uint8_t *)dst)[2], (int)((uint8_t *)dst)[3]);

  755.         break;

  756.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  757.         i64 = *(int64_t *)dst;

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

  759.         break;

  760.     default:

  761.         return AVERROR(EINVAL);

  762.     }

  763. 

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

  765.         return AVERROR(EINVAL);

  766.     *out_val = av_strdup(buf);

  767.     return 0;

  768. }

  769. 

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

  771.                       int search_flags)

  772. {

  773.     void *dst, *target_obj;

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

  775.     if (!o || !target_obj)

  776.         goto error;

  777. 

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

  779. 

  780.     if (o_out) *o_out= o;

  781. 

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

  783. 

  784. error:

  785.     *den=*intnum=0;

  786.     return -1;

  787. }

  788. 

  789. #if FF_API_OLD_AVOPTIONS

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

  791. {

  792.     int64_t intnum=1;

  793.     double num=1;

  794.     int den=1;

  795. 

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

  797.         return NAN;

  798.     return num*intnum/den;

  799. }

  800. 

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

  802. {

  803.     int64_t intnum=1;

  804.     double num=1;

  805.     int den=1;

  806. 

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

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

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

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

  811.     else

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

  813. }

  814. 

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

  816. {

  817.     int64_t intnum=1;

  818.     double num=1;

  819.     int den=1;

  820. 

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

  822.         return -1;

  823.     return num*intnum/den;

  824. }

  825. #endif

  826. 

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

  828. {

  829.     int64_t intnum = 1;

  830.     double     num = 1;

  831.     int   ret, den = 1;

  832. 

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

  834.         return ret;

  835.     *out_val = num*intnum/den;

  836.     return 0;

  837. }

  838. 

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

  840. {

  841.     int64_t intnum = 1;

  842.     double     num = 1;

  843.     int   ret, den = 1;

  844. 

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

  846.         return ret;

  847.     *out_val = num*intnum/den;

  848.     return 0;

  849. }

  850. 

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

  852. {

  853.     int64_t intnum = 1;

  854.     double     num = 1;

  855.     int   ret, den = 1;

  856. 

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

  858.         return ret;

  859. 

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

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

  862.     else

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

  864.     return 0;

  865. }

  866. 

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

  868. {

  869.     void *dst, *target_obj;

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

  871.     if (!o || !target_obj)

  872.         return AVERROR_OPTION_NOT_FOUND;

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

  874.         av_log(obj, AV_LOG_ERROR,

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

  876.         return AVERROR(EINVAL);

  877.     }

  878. 

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

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

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

  882.     return 0;

  883. }

  884. 

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

  886. {

  887.     int64_t intnum = 1;

  888.     double     num = 1;

  889.     int   ret, den = 1;

  890. 

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

  892.         return ret;

  893. 

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

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

  896.     else

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

  898.     return 0;

  899. }

  900. 

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

  902.                       enum AVOptionType type, const char *desc)

  903. {

  904.     void *dst, *target_obj;

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

  906.     if (!o || !target_obj)

  907.         return AVERROR_OPTION_NOT_FOUND;

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

  909.         av_log(obj, AV_LOG_ERROR,

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

  911.         return AVERROR(EINVAL);

  912.     }

  913. 

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

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

  916.     return 0;

  917. }

  918. 

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

  920. {

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

  922. }

  923. 

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

  925. {

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

  927. }

  928. 

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

  930. {

  931.     void *dst, *target_obj;

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

  933.     if (!o || !target_obj)

  934.         return AVERROR_OPTION_NOT_FOUND;

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

  936.         av_log(obj, AV_LOG_ERROR,

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

  938.         return AVERROR(EINVAL);

  939.     }

  940. 

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

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

  943.     return 0;

  944. }

  945. 

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

  947. {

  948.     void *target_obj;

  949.     AVDictionary *src;

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

  951. 

  952.     if (!o || !target_obj)

  953.         return AVERROR_OPTION_NOT_FOUND;

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

  955.         return AVERROR(EINVAL);

  956. 

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

  958.     av_dict_copy(out_val, src, 0);

  959. 

  960.     return 0;

  961. }

  962. 

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

  964. {

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

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

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

  968.     int64_t res;

  969. 

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

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

  972.         return 0;

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

  974. }

  975. 

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

  977. {

  978.     if      (d == INT_MAX) {

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  1000.     } else if (d == -DBL_MAX) {

  1001.         av_log(av_log_obj, level, "-DBL_MAX");

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

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

  1004.     } else {

  1005.         av_log(av_log_obj, level, "%g", d);

  1006.     }

  1007. }

  1008. 

  1009. static void opt_list(void *obj, void *av_log_obj, const char *unit,

  1010.                      int req_flags, int rej_flags)

  1011. {

  1012.     const AVOption *opt=NULL;

  1013.     AVOptionRanges *r;

  1014.     int i;

  1015. 

  1016.     while ((opt = av_opt_next(obj, opt))) {

  1017.         if (!(opt->flags & req_flags) || (opt->flags & rej_flags))

  1018.             continue;

  1019. 

  1020.         /* Don't print CONST's on level one.

  1021.          * Don't print anything but CONST's on level two.

  1022.          * Only print items from the requested unit.

  1023.          */

  1024.         if (!unit && opt->type==AV_OPT_TYPE_CONST)

  1025.             continue;

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

  1027.             continue;

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

  1029.             continue;

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

  1031.             av_log(av_log_obj, AV_LOG_INFO, "     %-15s ", opt->name);

  1032.         else

  1033.             av_log(av_log_obj, AV_LOG_INFO, "  %s%-17s ",

  1034.                    (opt->flags & AV_OPT_FLAG_FILTERING_PARAM) ? "" : "-",

  1035.                    opt->name);

  1036. 

  1037.         switch (opt->type) {

  1038.             case AV_OPT_TYPE_FLAGS:

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

  1040.                 break;

  1041.             case AV_OPT_TYPE_INT:

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

  1043.                 break;

  1044.             case AV_OPT_TYPE_INT64:

  1045.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<int64>");

  1046.                 break;

  1047.             case AV_OPT_TYPE_DOUBLE:

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

  1049.                 break;

  1050.             case AV_OPT_TYPE_FLOAT:

  1051.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<float>");

  1052.                 break;

  1053.             case AV_OPT_TYPE_STRING:

  1054.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<string>");

  1055.                 break;

  1056.             case AV_OPT_TYPE_RATIONAL:

  1057.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<rational>");

  1058.                 break;

  1059.             case AV_OPT_TYPE_BINARY:

  1060.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<binary>");

  1061.                 break;

  1062.             case AV_OPT_TYPE_IMAGE_SIZE:

  1063.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<image_size>");

  1064.                 break;

  1065.             case AV_OPT_TYPE_VIDEO_RATE:

  1066.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<video_rate>");

  1067.                 break;

  1068.             case AV_OPT_TYPE_PIXEL_FMT:

  1069.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<pix_fmt>");

  1070.                 break;

  1071.             case AV_OPT_TYPE_SAMPLE_FMT:

  1072.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<sample_fmt>");

  1073.                 break;

  1074.             case AV_OPT_TYPE_DURATION:

  1075.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<duration>");

  1076.                 break;

  1077.             case AV_OPT_TYPE_COLOR:

  1078.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<color>");

  1079.                 break;

  1080.             case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1081.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<channel_layout>");

  1082.                 break;

  1083.             case AV_OPT_TYPE_CONST:

  1084.             default:

  1085.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "");

  1086.                 break;

  1087.         }

  1088.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_ENCODING_PARAM) ? 'E' : '.');

  1089.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_DECODING_PARAM) ? 'D' : '.');

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

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

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

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

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

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

  1096. 

  1097.         if (opt->help)

  1098.             av_log(av_log_obj, AV_LOG_INFO, " %s", opt->help);

  1099. 

  1100.         if (av_opt_query_ranges(&r, obj, opt->name, AV_OPT_SEARCH_FAKE_OBJ) >= 0) {

  1101.             switch (opt->type) {

  1102.             case AV_OPT_TYPE_INT:

  1103.             case AV_OPT_TYPE_INT64:

  1104.             case AV_OPT_TYPE_DOUBLE:

  1105.             case AV_OPT_TYPE_FLOAT:

  1106.             case AV_OPT_TYPE_RATIONAL:

  1107.                 for (i = 0; i < r->nb_ranges; i++) {

  1108.                     av_log(av_log_obj, AV_LOG_INFO, " (from ");

  1109.                     log_value(av_log_obj, AV_LOG_INFO, r->range[i]->value_min);

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

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

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

  1113.                 }

  1114.                 break;

  1115.             }

  1116.             av_opt_freep_ranges(&r);

  1117.         }

  1118. 

  1119.         if (opt->type != AV_OPT_TYPE_CONST  &&

  1120.             opt->type != AV_OPT_TYPE_BINARY &&

  1121.                 !((opt->type == AV_OPT_TYPE_COLOR      ||

  1122.                    opt->type == AV_OPT_TYPE_IMAGE_SIZE ||

  1123.                    opt->type == AV_OPT_TYPE_STRING     ||

  1124.                    opt->type == AV_OPT_TYPE_VIDEO_RATE) &&

  1125.                   !opt->default_val.str)) {

  1126.             av_log(av_log_obj, AV_LOG_INFO, " (default ");

  1127.             switch (opt->type) {

  1128.             case AV_OPT_TYPE_FLAGS:

  1129.                 av_log(av_log_obj, AV_LOG_INFO, "%"PRIX64, opt->default_val.i64);

  1130.                 break;

  1131.             case AV_OPT_TYPE_DURATION:

  1132.             case AV_OPT_TYPE_INT:

  1133.             case AV_OPT_TYPE_INT64:

  1134.                 log_value(av_log_obj, AV_LOG_INFO, opt->default_val.i64);

  1135.                 break;

  1136.             case AV_OPT_TYPE_DOUBLE:

  1137.             case AV_OPT_TYPE_FLOAT:

  1138.                 log_value(av_log_obj, AV_LOG_INFO, opt->default_val.dbl);

  1139.                 break;

  1140.             case AV_OPT_TYPE_RATIONAL: {

  1141.                 AVRational q = av_d2q(opt->default_val.dbl, INT_MAX);

  1142.                 av_log(av_log_obj, AV_LOG_INFO, "%d/%d", q.num, q.den); }

  1143.                 break;

  1144.             case AV_OPT_TYPE_PIXEL_FMT:

  1145.                 av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(av_get_pix_fmt_name(opt->default_val.i64), "none"));

  1146.                 break;

  1147.             case AV_OPT_TYPE_SAMPLE_FMT:

  1148.                 av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(av_get_sample_fmt_name(opt->default_val.i64), "none"));

  1149.                 break;

  1150.             case AV_OPT_TYPE_COLOR:

  1151.             case AV_OPT_TYPE_IMAGE_SIZE:

  1152.             case AV_OPT_TYPE_STRING:

  1153.             case AV_OPT_TYPE_VIDEO_RATE:

  1154.                 av_log(av_log_obj, AV_LOG_INFO, "\"%s\"", opt->default_val.str);

  1155.                 break;

  1156.             case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1157.                 av_log(av_log_obj, AV_LOG_INFO, "0x%"PRIx64, opt->default_val.i64);

  1158.                 break;

  1159.             }

  1160.             av_log(av_log_obj, AV_LOG_INFO, ")");

  1161.         }

  1162. 

  1163.         av_log(av_log_obj, AV_LOG_INFO, "\n");

  1164.         if (opt->unit && opt->type != AV_OPT_TYPE_CONST) {

  1165.             opt_list(obj, av_log_obj, opt->unit, req_flags, rej_flags);

  1166.         }

  1167.     }

  1168. }

  1169. 

  1170. int av_opt_show2(void *obj, void *av_log_obj, int req_flags, int rej_flags)

  1171. {

  1172.     if (!obj)

  1173.         return -1;

  1174. 

  1175.     av_log(av_log_obj, AV_LOG_INFO, "%s AVOptions:\n", (*(AVClass**)obj)->class_name);

  1176. 

  1177.     opt_list(obj, av_log_obj, NULL, req_flags, rej_flags);

  1178. 

  1179.     return 0;

  1180. }

  1181. 

  1182. void av_opt_set_defaults(void *s)

  1183. {

  1184. #if FF_API_OLD_AVOPTIONS

  1185.     av_opt_set_defaults2(s, 0, 0);

  1186. }

  1187. 

  1188. void av_opt_set_defaults2(void *s, int mask, int flags)

  1189. {

  1190. #endif

  1191.     const AVOption *opt = NULL;

  1192.     while ((opt = av_opt_next(s, opt))) {

  1193.         void *dst = ((uint8_t*)s) + opt->offset;

  1194. #if FF_API_OLD_AVOPTIONS

  1195.         if ((opt->flags & mask) != flags)

  1196.             continue;

  1197. #endif

  1198. 

  1199.         if (opt->flags & AV_OPT_FLAG_READONLY)

  1200.             continue;

  1201. 

  1202.         switch (opt->type) {

  1203.             case AV_OPT_TYPE_CONST:

  1204.                 /* Nothing to be done here */

  1205.             break;

  1206.             case AV_OPT_TYPE_FLAGS:

  1207.             case AV_OPT_TYPE_INT:

  1208.             case AV_OPT_TYPE_INT64:

  1209.             case AV_OPT_TYPE_DURATION:

  1210.             case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1211.                 write_number(s, opt, dst, 1, 1, opt->default_val.i64);

  1212.             break;

  1213.             case AV_OPT_TYPE_DOUBLE:

  1214.             case AV_OPT_TYPE_FLOAT: {

  1215.                 double val;

  1216.                 val = opt->default_val.dbl;

  1217.                 write_number(s, opt, dst, val, 1, 1);

  1218.             }

  1219.             break;

  1220.             case AV_OPT_TYPE_RATIONAL: {

  1221.                 AVRational val;

  1222.                 val = av_d2q(opt->default_val.dbl, INT_MAX);

  1223.                 write_number(s, opt, dst, 1, val.den, val.num);

  1224.             }

  1225.             break;

  1226.             case AV_OPT_TYPE_COLOR:

  1227.                 set_string_color(s, opt, opt->default_val.str, dst);

  1228.                 break;

  1229.             case AV_OPT_TYPE_STRING:

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

  1231.                 break;

  1232.             case AV_OPT_TYPE_IMAGE_SIZE:

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

  1234.                 break;

  1235.             case AV_OPT_TYPE_VIDEO_RATE:

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

  1237.                 break;

  1238.             case AV_OPT_TYPE_PIXEL_FMT:

  1239.                 write_number(s, opt, dst, 1, 1, opt->default_val.i64);

  1240.                 break;

  1241.             case AV_OPT_TYPE_SAMPLE_FMT:

  1242.                 write_number(s, opt, dst, 1, 1, opt->default_val.i64);

  1243.                 break;

  1244.             case AV_OPT_TYPE_BINARY:

  1245.             case AV_OPT_TYPE_DICT:

  1246.                 /* Cannot set defaults for these types */

  1247.             break;

  1248.             default:

  1249.                 av_log(s, AV_LOG_DEBUG, "AVOption type %d of option %s not implemented yet\n", opt->type, opt->name);

  1250.         }

  1251.     }

  1252. }

  1253. 

  1254. /**

  1255.  * Store the value in the field in ctx that is named like key.

  1256.  * ctx must be an AVClass context, storing is done using AVOptions.

  1257.  *

  1258.  * @param buf the string to parse, buf will be updated to point at the

  1259.  * separator just after the parsed key/value pair

  1260.  * @param key_val_sep a 0-terminated list of characters used to

  1261.  * separate key from value

  1262.  * @param pairs_sep a 0-terminated list of characters used to separate

  1263.  * two pairs from each other

  1264.  * @return 0 if the key/value pair has been successfully parsed and

  1265.  * set, or a negative value corresponding to an AVERROR code in case

  1266.  * of error:

  1267.  * AVERROR(EINVAL) if the key/value pair cannot be parsed,

  1268.  * the error code issued by av_opt_set() if the key/value pair

  1269.  * cannot be set

  1270.  */

  1271. static int parse_key_value_pair(void *ctx, const char **buf,

  1272.                                 const char *key_val_sep, const char *pairs_sep)

  1273. {

  1274.     char *key = av_get_token(buf, key_val_sep);

  1275.     char *val;

  1276.     int ret;

  1277. 

  1278.     if (!key)

  1279.         return AVERROR(ENOMEM);

  1280. 

  1281.     if (*key && strspn(*buf, key_val_sep)) {

  1282.         (*buf)++;

  1283.         val = av_get_token(buf, pairs_sep);

  1284.         if (!val) {

  1285.             av_freep(&key);

  1286.             return AVERROR(ENOMEM);

  1287.         }

  1288.     } else {

  1289.         av_log(ctx, AV_LOG_ERROR, "Missing key or no key/value separator found after key '%s'\n", key);

  1290.         av_free(key);

  1291.         return AVERROR(EINVAL);

  1292.     }

  1293. 

  1294.     av_log(ctx, AV_LOG_DEBUG, "Setting entry with key '%s' to value '%s'\n", key, val);

  1295. 

  1296.     ret = av_opt_set(ctx, key, val, AV_OPT_SEARCH_CHILDREN);

  1297.     if (ret == AVERROR_OPTION_NOT_FOUND)

  1298.         av_log(ctx, AV_LOG_ERROR, "Key '%s' not found.\n", key);

  1299. 

  1300.     av_free(key);

  1301.     av_free(val);

  1302.     return ret;

  1303. }

  1304. 

  1305. int av_set_options_string(void *ctx, const char *opts,

  1306.                           const char *key_val_sep, const char *pairs_sep)

  1307. {

  1308.     int ret, count = 0;

  1309. 

  1310.     if (!opts)

  1311.         return 0;

  1312. 

  1313.     while (*opts) {

  1314.         if ((ret = parse_key_value_pair(ctx, &opts, key_val_sep, pairs_sep)) < 0)

  1315.             return ret;

  1316.         count++;

  1317. 

  1318.         if (*opts)

  1319.             opts++;

  1320.     }

  1321. 

  1322.     return count;

  1323. }

  1324. 

  1325. #define WHITESPACES " \n\t"

  1326. 

  1327. static int is_key_char(char c)

  1328. {

  1329.     return (unsigned)((c | 32) - 'a') < 26 ||

  1330.            (unsigned)(c - '0') < 10 ||

  1331.            c == '-' || c == '_' || c == '/' || c == '.';

  1332. }

  1333. 

  1334. /**

  1335.  * Read a key from a string.

  1336.  *

  1337.  * The key consists of is_key_char characters and must be terminated by a

  1338.  * character from the delim string; spaces are ignored.

  1339.  *

  1340.  * @return  0 for success (even with ellipsis), <0 for failure

  1341.  */

  1342. static int get_key(const char **ropts, const char *delim, char **rkey)

  1343. {

  1344.     const char *opts = *ropts;

  1345.     const char *key_start, *key_end;

  1346. 

  1347.     key_start = opts += strspn(opts, WHITESPACES);

  1348.     while (is_key_char(*opts))

  1349.         opts++;

  1350.     key_end = opts;

  1351.     opts += strspn(opts, WHITESPACES);

  1352.     if (!*opts || !strchr(delim, *opts))

  1353.         return AVERROR(EINVAL);

  1354.     opts++;

  1355.     if (!(*rkey = av_malloc(key_end - key_start + 1)))

  1356.         return AVERROR(ENOMEM);

  1357.     memcpy(*rkey, key_start, key_end - key_start);

  1358.     (*rkey)[key_end - key_start] = 0;

  1359.     *ropts = opts;

  1360.     return 0;

  1361. }

  1362. 

  1363. int av_opt_get_key_value(const char **ropts,

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

  1365.                          unsigned flags,

  1366.                          char **rkey, char **rval)

  1367. {

  1368.     int ret;

  1369.     char *key = NULL, *val;

  1370.     const char *opts = *ropts;

  1371. 

  1372.     if ((ret = get_key(&opts, key_val_sep, &key)) < 0 &&

  1373.         !(flags & AV_OPT_FLAG_IMPLICIT_KEY))

  1374.         return AVERROR(EINVAL);

  1375.     if (!(val = av_get_token(&opts, pairs_sep))) {

  1376.         av_free(key);

  1377.         return AVERROR(ENOMEM);

  1378.     }

  1379.     *ropts = opts;

  1380.     *rkey  = key;

  1381.     *rval  = val;

  1382.     return 0;

  1383. }

  1384. 

  1385. int av_opt_set_from_string(void *ctx, const char *opts,

  1386.                            const char *const *shorthand,

  1387.                            const char *key_val_sep, const char *pairs_sep)

  1388. {

  1389.     int ret, count = 0;

  1390.     const char *dummy_shorthand = NULL;

  1391.     char *av_uninit(parsed_key), *av_uninit(value);

  1392.     const char *key;

  1393. 

  1394.     if (!opts)

  1395.         return 0;

  1396.     if (!shorthand)

  1397.         shorthand = &dummy_shorthand;

  1398. 

  1399.     while (*opts) {

  1400.         ret = av_opt_get_key_value(&opts, key_val_sep, pairs_sep,

  1401.                                    *shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,

  1402.                                    &parsed_key, &value);

  1403.         if (ret < 0) {

  1404.             if (ret == AVERROR(EINVAL))

  1405.                 av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", opts);

  1406.             else

  1407.                 av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", opts,

  1408.                        av_err2str(ret));

  1409.             return ret;

  1410.         }

  1411.         if (*opts)

  1412.             opts++;

  1413.         if (parsed_key) {

  1414.             key = parsed_key;

  1415.             while (*shorthand) /* discard all remaining shorthand */

  1416.                 shorthand++;

  1417.         } else {

  1418.             key = *(shorthand++);

  1419.         }

  1420. 

  1421.         av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);

  1422.         if ((ret = av_opt_set(ctx, key, value, 0)) < 0) {

  1423.             if (ret == AVERROR_OPTION_NOT_FOUND)

  1424.                 av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);

  1425.             av_free(value);

  1426.             av_free(parsed_key);

  1427.             return ret;

  1428.         }

  1429. 

  1430.         av_free(value);

  1431.         av_free(parsed_key);

  1432.         count++;

  1433.     }

  1434.     return count;

  1435. }

  1436. 

  1437. void av_opt_free(void *obj)

  1438. {

  1439.     const AVOption *o = NULL;

  1440.     while ((o = av_opt_next(obj, o))) {

  1441.         switch (o->type) {

  1442.         case AV_OPT_TYPE_STRING:

  1443.         case AV_OPT_TYPE_BINARY:

  1444.             av_freep((uint8_t *)obj + o->offset);

  1445.             break;

  1446. 

  1447.         case AV_OPT_TYPE_DICT:

  1448.             av_dict_free((AVDictionary **)(((uint8_t *)obj) + o->offset));

  1449.             break;

  1450. 

  1451.         default:

  1452.             break;

  1453.         }

  1454.     }

  1455. }

  1456. 

  1457. int av_opt_set_dict2(void *obj, AVDictionary **options, int search_flags)

  1458. {

  1459.     AVDictionaryEntry *t = NULL;

  1460.     AVDictionary    *tmp = NULL;

  1461.     int ret = 0;

  1462. 

  1463.     if (!options)

  1464.         return 0;

  1465. 

  1466.     while ((t = av_dict_get(*options, "", t, AV_DICT_IGNORE_SUFFIX))) {

  1467.         ret = av_opt_set(obj, t->key, t->value, search_flags);

  1468.         if (ret == AVERROR_OPTION_NOT_FOUND)

  1469.             av_dict_set(&tmp, t->key, t->value, 0);

  1470.         else if (ret < 0) {

  1471.             av_log(obj, AV_LOG_ERROR, "Error setting option %s to value %s.\n", t->key, t->value);

  1472.             break;

  1473.         }

  1474.         ret = 0;

  1475.     }

  1476.     av_dict_free(options);

  1477.     *options = tmp;

  1478.     return ret;

  1479. }

  1480. 

  1481. int av_opt_set_dict(void *obj, AVDictionary **options)

  1482. {

  1483.     return av_opt_set_dict2(obj, options, 0);

  1484. }

  1485. 

  1486. const AVOption *av_opt_find(void *obj, const char *name, const char *unit,

  1487.                             int opt_flags, int search_flags)

  1488. {

  1489.     return av_opt_find2(obj, name, unit, opt_flags, search_flags, NULL);

  1490. }

  1491. 

  1492. const AVOption *av_opt_find2(void *obj, const char *name, const char *unit,

  1493.                              int opt_flags, int search_flags, void **target_obj)

  1494. {

  1495.     const AVClass  *c;

  1496.     const AVOption *o = NULL;

  1497. 

  1498.     if(!obj)

  1499.         return NULL;

  1500. 

  1501.     c= *(AVClass**)obj;

  1502. 

  1503.     if (!c)

  1504.         return NULL;

  1505. 

  1506.     if (search_flags & AV_OPT_SEARCH_CHILDREN) {

  1507.         if (search_flags & AV_OPT_SEARCH_FAKE_OBJ) {

  1508.             const AVClass *child = NULL;

  1509.             while (child = av_opt_child_class_next(c, child))

  1510.                 if (o = av_opt_find2(&child, name, unit, opt_flags, search_flags, NULL))

  1511.                     return o;

  1512.         } else {

  1513.             void *child = NULL;

  1514.             while (child = av_opt_child_next(obj, child))

  1515.                 if (o = av_opt_find2(child, name, unit, opt_flags, search_flags, target_obj))

  1516.                     return o;

  1517.         }

  1518.     }

  1519. 

  1520.     while (o = av_opt_next(obj, o)) {

  1521.         if (!strcmp(o->name, name) && (o->flags & opt_flags) == opt_flags &&

  1522.             ((!unit && o->type != AV_OPT_TYPE_CONST) ||

  1523.              (unit  && o->type == AV_OPT_TYPE_CONST && o->unit && !strcmp(o->unit, unit)))) {

  1524.             if (target_obj) {

  1525.                 if (!(search_flags & AV_OPT_SEARCH_FAKE_OBJ))

  1526.                     *target_obj = obj;

  1527.                 else

  1528.                     *target_obj = NULL;

  1529.             }

  1530.             return o;

  1531.         }

  1532.     }

  1533.     return NULL;

  1534. }

  1535. 

  1536. void *av_opt_child_next(void *obj, void *prev)

  1537. {

  1538.     const AVClass *c = *(AVClass**)obj;

  1539.     if (c->child_next)

  1540.         return c->child_next(obj, prev);

  1541.     return NULL;

  1542. }

  1543. 

  1544. const AVClass *av_opt_child_class_next(const AVClass *parent, const AVClass *prev)

  1545. {

  1546.     if (parent->child_class_next)

  1547.         return parent->child_class_next(prev);

  1548.     return NULL;

  1549. }

  1550. 

  1551. void *av_opt_ptr(const AVClass *class, void *obj, const char *name)

  1552. {

  1553.     const AVOption *opt= av_opt_find2(&class, name, NULL, 0, AV_OPT_SEARCH_FAKE_OBJ, NULL);

  1554.     if(!opt)

  1555.         return NULL;

  1556.     return (uint8_t*)obj + opt->offset;

  1557. }

  1558. 

  1559. static int opt_size(enum AVOptionType type)

  1560. {

  1561.     switch(type) {

  1562.     case AV_OPT_TYPE_INT:

  1563.     case AV_OPT_TYPE_FLAGS:     return sizeof(int);

  1564.     case AV_OPT_TYPE_DURATION:

  1565.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1566.     case AV_OPT_TYPE_INT64:     return sizeof(int64_t);

  1567.     case AV_OPT_TYPE_DOUBLE:    return sizeof(double);

  1568.     case AV_OPT_TYPE_FLOAT:     return sizeof(float);

  1569.     case AV_OPT_TYPE_STRING:    return sizeof(uint8_t*);

  1570.     case AV_OPT_TYPE_VIDEO_RATE:

  1571.     case AV_OPT_TYPE_RATIONAL:  return sizeof(AVRational);

  1572.     case AV_OPT_TYPE_BINARY:    return sizeof(uint8_t*) + sizeof(int);

  1573.     case AV_OPT_TYPE_IMAGE_SIZE:return sizeof(int[2]);

  1574.     case AV_OPT_TYPE_PIXEL_FMT: return sizeof(enum AVPixelFormat);

  1575.     case AV_OPT_TYPE_SAMPLE_FMT:return sizeof(enum AVSampleFormat);

  1576.     case AV_OPT_TYPE_COLOR:     return 4;

  1577.     }

  1578.     return 0;

  1579. }

  1580. 

  1581. int av_opt_copy(void *dst, void *src)

  1582. {

  1583.     const AVOption *o = NULL;

  1584.     const AVClass *c;

  1585.     int ret = 0;

  1586. 

  1587.     if (!src)

  1588.         return 0;

  1589. 

  1590.     c = *(AVClass**)src;

  1591.     if (*(AVClass**)dst && c != *(AVClass**)dst)

  1592.         return AVERROR(EINVAL);

  1593. 

  1594.     while ((o = av_opt_next(src, o))) {

  1595.         void *field_dst = ((uint8_t*)dst) + o->offset;

  1596.         void *field_src = ((uint8_t*)src) + o->offset;

  1597.         uint8_t **field_dst8 = (uint8_t**)field_dst;

  1598.         uint8_t **field_src8 = (uint8_t**)field_src;

  1599. 

  1600.         if (o->type == AV_OPT_TYPE_STRING) {

  1601.             if (*field_dst8 != *field_src8)

  1602.                 av_freep(field_dst8);

  1603.             *field_dst8 = av_strdup(*field_src8);

  1604.             if (*field_src8 && !*field_dst8)

  1605.                 ret = AVERROR(ENOMEM);

  1606.         } else if (o->type == AV_OPT_TYPE_BINARY) {

  1607.             int len = *(int*)(field_src8 + 1);

  1608.             if (*field_dst8 != *field_src8)

  1609.                 av_freep(field_dst8);

  1610.             *field_dst8 = av_memdup(*field_src8, len);

  1611.             if (len && !*field_dst8) {

  1612.                 ret = AVERROR(ENOMEM);

  1613.                 len = 0;

  1614.             }

  1615.             *(int*)(field_dst8 + 1) = len;

  1616.         } else if (o->type == AV_OPT_TYPE_CONST) {

  1617.             // do nothing

  1618.         } else {

  1619.             memcpy(field_dst, field_src, opt_size(o->type));

  1620.         }

  1621.     }

  1622.     return ret;

  1623. }

  1624. 

  1625. int av_opt_query_ranges(AVOptionRanges **ranges_arg, void *obj, const char *key, int flags)

  1626. {

  1627.     int ret;

  1628.     const AVClass *c = *(AVClass**)obj;

  1629.     int (*callback)(AVOptionRanges **, void *obj, const char *key, int flags) = NULL;

  1630. 

  1631.     if (c->version > (52 << 16 | 11 << 8))

  1632.         callback = c->query_ranges;

  1633. 

  1634.     if (!callback)

  1635.         callback = av_opt_query_ranges_default;

  1636. 

  1637.     ret = callback(ranges_arg, obj, key, flags);

  1638.     if (ret >= 0) {

  1639.         if (!(flags & AV_OPT_MULTI_COMPONENT_RANGE))

  1640.             ret = 1;

  1641.         (*ranges_arg)->nb_components = ret;

  1642.     }

  1643.     return ret;

  1644. }

  1645. 

  1646. int av_opt_query_ranges_default(AVOptionRanges **ranges_arg, void *obj, const char *key, int flags)

  1647. {

  1648.     AVOptionRanges *ranges = av_mallocz(sizeof(*ranges));

  1649.     AVOptionRange **range_array = av_mallocz(sizeof(void*));

  1650.     AVOptionRange *range = av_mallocz(sizeof(*range));

  1651.     const AVOption *field = av_opt_find(obj, key, NULL, 0, flags);

  1652.     int ret;

  1653. 

  1654.     *ranges_arg = NULL;

  1655. 

  1656.     if (!ranges || !range || !range_array || !field) {

  1657.         ret = AVERROR(ENOMEM);

  1658.         goto fail;

  1659.     }

  1660. 

  1661.     ranges->range = range_array;

  1662.     ranges->range[0] = range;

  1663.     ranges->nb_ranges = 1;

  1664.     ranges->nb_components = 1;

  1665.     range->is_range = 1;

  1666.     range->value_min = field->min;

  1667.     range->value_max = field->max;

  1668. 

  1669.     switch (field->type) {

  1670.     case AV_OPT_TYPE_INT:

  1671.     case AV_OPT_TYPE_INT64:

  1672.     case AV_OPT_TYPE_PIXEL_FMT:

  1673.     case AV_OPT_TYPE_SAMPLE_FMT:

  1674.     case AV_OPT_TYPE_FLOAT:

  1675.     case AV_OPT_TYPE_DOUBLE:

  1676.     case AV_OPT_TYPE_DURATION:

  1677.     case AV_OPT_TYPE_COLOR:

  1678.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1679.         break;

  1680.     case AV_OPT_TYPE_STRING:

  1681.         range->component_min = 0;

  1682.         range->component_max = 0x10FFFF; // max unicode value

  1683.         range->value_min = -1;

  1684.         range->value_max = INT_MAX;

  1685.         break;

  1686.     case AV_OPT_TYPE_RATIONAL:

  1687.         range->component_min = INT_MIN;

  1688.         range->component_max = INT_MAX;

  1689.         break;

  1690.     case AV_OPT_TYPE_IMAGE_SIZE:

  1691.         range->component_min = 0;

  1692.         range->component_max = INT_MAX/128/8;

  1693.         range->value_min = 0;

  1694.         range->value_max = INT_MAX/8;

  1695.         break;

  1696.     case AV_OPT_TYPE_VIDEO_RATE:

  1697.         range->component_min = 1;

  1698.         range->component_max = INT_MAX;

  1699.         range->value_min = 1;

  1700.         range->value_max = INT_MAX;

  1701.         break;

  1702.     default:

  1703.         ret = AVERROR(ENOSYS);

  1704.         goto fail;

  1705.     }

  1706. 

  1707.     *ranges_arg = ranges;

  1708.     return 1;

  1709. fail:

  1710.     av_free(ranges);

  1711.     av_free(range);

  1712.     av_free(range_array);

  1713.     return ret;

  1714. }

  1715. 

  1716. void av_opt_freep_ranges(AVOptionRanges **rangesp)

  1717. {

  1718.     int i;

  1719.     AVOptionRanges *ranges = *rangesp;

  1720. 

  1721.     if (!ranges)

  1722.         return;

  1723. 

  1724.     for (i = 0; i < ranges->nb_ranges * ranges->nb_components; i++) {

  1725.         AVOptionRange *range = ranges->range[i];

  1726.         if (range) {

  1727.             av_freep(&range->str);

  1728.             av_freep(&ranges->range[i]);

  1729.         }

  1730.     }

  1731.     av_freep(&ranges->range);

  1732.     av_freep(rangesp);

  1733. }

  1734. 

  1735. #ifdef TEST

  1736. 

  1737. typedef struct TestContext

  1738. {

  1739.     const AVClass *class;

  1740.     int num;

  1741.     int toggle;

  1742.     char *string;

  1743.     int flags;

  1744.     AVRational rational;

  1745.     AVRational video_rate;

  1746.     int w, h;

  1747.     enum AVPixelFormat pix_fmt;

  1748.     enum AVSampleFormat sample_fmt;

  1749.     int64_t duration;

  1750.     uint8_t color[4];

  1751.     int64_t channel_layout;

  1752. } TestContext;

  1753. 

  1754. #define OFFSET(x) offsetof(TestContext, x)

  1755. 

  1756. #define TEST_FLAG_COOL 01

  1757. #define TEST_FLAG_LAME 02

  1758. #define TEST_FLAG_MU   04

  1759. 

  1760. static const AVOption test_options[]= {

  1761. {"num",      "set num",        OFFSET(num),      AV_OPT_TYPE_INT,      {.i64 = 0},       0,        100                 },

  1762. {"toggle",   "set toggle",     OFFSET(toggle),   AV_OPT_TYPE_INT,      {.i64 = 0},       0,        1                   },

  1763. {"rational", "set rational",   OFFSET(rational), AV_OPT_TYPE_RATIONAL, {.dbl = 0},       0,        10                  },

  1764. {"string",   "set string",     OFFSET(string),   AV_OPT_TYPE_STRING,   {.str = "default"}, CHAR_MIN, CHAR_MAX          },

  1765. {"flags",    "set flags",      OFFSET(flags),    AV_OPT_TYPE_FLAGS,    {.i64 = 0},       0,        INT_MAX, 0, "flags" },

  1766. {"cool",     "set cool flag ", 0,                AV_OPT_TYPE_CONST,    {.i64 = TEST_FLAG_COOL}, INT_MIN,  INT_MAX, 0, "flags" },

  1767. {"lame",     "set lame flag ", 0,                AV_OPT_TYPE_CONST,    {.i64 = TEST_FLAG_LAME}, INT_MIN,  INT_MAX, 0, "flags" },

  1768. {"mu",       "set mu flag ",   0,                AV_OPT_TYPE_CONST,    {.i64 = TEST_FLAG_MU},   INT_MIN,  INT_MAX, 0, "flags" },

  1769. {"size",     "set size",       OFFSET(w),        AV_OPT_TYPE_IMAGE_SIZE,{0},             0,        0                   },

  1770. {"pix_fmt",  "set pixfmt",     OFFSET(pix_fmt),  AV_OPT_TYPE_PIXEL_FMT, {.i64 = AV_PIX_FMT_NONE}, -1, INT_MAX},

  1771. {"sample_fmt", "set samplefmt", OFFSET(sample_fmt), AV_OPT_TYPE_SAMPLE_FMT, {.i64 = AV_SAMPLE_FMT_NONE}, -1, INT_MAX},

  1772. {"video_rate", "set videorate", OFFSET(video_rate), AV_OPT_TYPE_VIDEO_RATE,  {.str = "25"}, 0,     0                   },

  1773. {"duration", "set duration",   OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, INT64_MAX},

  1774. {"color", "set color",   OFFSET(color), AV_OPT_TYPE_COLOR, {.str = "pink"}, 0, 0},

  1775. {"cl", "set channel layout", OFFSET(channel_layout), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64 = AV_CH_LAYOUT_HEXAGONAL}, 0, INT64_MAX},

  1776. {NULL},

  1777. };

  1778. 

  1779. static const char *test_get_name(void *ctx)

  1780. {

  1781.     return "test";

  1782. }

  1783. 

  1784. static const AVClass test_class = {

  1785.     "TestContext",

  1786.     test_get_name,

  1787.     test_options

  1788. };

  1789. 

  1790. int main(void)

  1791. {

  1792.     int i;

  1793. 

  1794.     printf("\nTesting av_set_options_string()\n");

  1795.     {

  1796.         TestContext test_ctx = { 0 };

  1797.         static const char * const options[] = {

  1798.             "",

  1799.             ":",

  1800.             "=",

  1801.             "foo=:",

  1802.             ":=foo",

  1803.             "=foo",

  1804.             "foo=",

  1805.             "foo",

  1806.             "foo=val",

  1807.             "foo==val",

  1808.             "toggle=:",

  1809.             "string=:",

  1810.             "toggle=1 : foo",

  1811.             "toggle=100",

  1812.             "toggle==1",

  1813.             "flags=+mu-lame : num=42: toggle=0",

  1814.             "num=42 : string=blahblah",

  1815.             "rational=0 : rational=1/2 : rational=1/-1",

  1816.             "rational=-1/0",

  1817.             "size=1024x768",

  1818.             "size=pal",

  1819.             "size=bogus",

  1820.             "pix_fmt=yuv420p",

  1821.             "pix_fmt=2",

  1822.             "pix_fmt=bogus",

  1823.             "sample_fmt=s16",

  1824.             "sample_fmt=2",

  1825.             "sample_fmt=bogus",

  1826.             "video_rate=pal",

  1827.             "video_rate=25",

  1828.             "video_rate=30000/1001",

  1829.             "video_rate=30/1.001",

  1830.             "video_rate=bogus",

  1831.             "duration=bogus",

  1832.             "duration=123.45",

  1833.             "duration=1\\:23\\:45.67",

  1834.             "color=blue",

  1835.             "color=0x223300",

  1836.             "color=0x42FF07AA",

  1837.             "cl=stereo+downmix",

  1838.             "cl=foo",

  1839.         };

  1840. 

  1841.         test_ctx.class = &test_class;

  1842.         av_opt_set_defaults(&test_ctx);

  1843. 

  1844.         av_log_set_level(AV_LOG_DEBUG);

  1845. 

  1846.         for (i=0; i < FF_ARRAY_ELEMS(options); i++) {

  1847.             av_log(&test_ctx, AV_LOG_DEBUG, "Setting options string '%s'\n", options[i]);

  1848.             if (av_set_options_string(&test_ctx, options[i], "=", ":") < 0)

  1849.                 av_log(&test_ctx, AV_LOG_ERROR, "Error setting options string: '%s'\n", options[i]);

  1850.             printf("\n");

  1851.         }

  1852.         av_opt_free(&test_ctx);

  1853.     }

  1854. 

  1855.     printf("\nTesting av_opt_set_from_string()\n");

  1856.     {

  1857.         TestContext test_ctx = { 0 };

  1858.         static const char * const options[] = {

  1859.             "",

  1860.             "5",

  1861.             "5:hello",

  1862.             "5:hello:size=pal",

  1863.             "5:size=pal:hello",

  1864.             ":",

  1865.             "=",

  1866.             " 5 : hello : size = pal ",

  1867.             "a_very_long_option_name_that_will_need_to_be_ellipsized_around_here=42"

  1868.         };

  1869.         static const char * const shorthand[] = { "num", "string", NULL };

  1870. 

  1871.         test_ctx.class = &test_class;

  1872.         av_opt_set_defaults(&test_ctx);

  1873. 

  1874.         av_log_set_level(AV_LOG_DEBUG);

  1875. 

  1876.         for (i=0; i < FF_ARRAY_ELEMS(options); i++) {

  1877.             av_log(&test_ctx, AV_LOG_DEBUG, "Setting options string '%s'\n", options[i]);

  1878.             if (av_opt_set_from_string(&test_ctx, options[i], shorthand, "=", ":") < 0)

  1879.                 av_log(&test_ctx, AV_LOG_ERROR, "Error setting options string: '%s'\n", options[i]);

  1880.             printf("\n");

  1881.         }

  1882.         av_opt_free(&test_ctx);

  1883.     }

  1884. 

  1885.     return 0;

  1886. }

  1887. 

  1888. #endif