falkTX
/
FFmpeg
mirror of https://github.com/falkTX/FFmpeg.git
1
0
Fork 0
Code Issues 0 Releases 338 Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
67545 Commits
32 Branches
552MB
Tree: bb60142f56
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from 'bb60142f56'
${ noResults }
FFmpeg/libavutil/opt.c

1881 lines
61KB
Raw Blame History 

  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_OLD_AVOPTIONS

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

  45. {

  46.     return av_opt_next(obj, last);

  47. }

  48. #endif

  49. 

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

  51. {

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

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

  54.         return class->option;

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

  56.         return ++last;

  57.     return NULL;

  58. }

  59. 

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

  61. {

  62.     switch (o->type) {

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

  64.     case AV_OPT_TYPE_PIXEL_FMT:

  65.     case AV_OPT_TYPE_SAMPLE_FMT:

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

  67.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  68.     case AV_OPT_TYPE_DURATION:

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

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

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

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

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

  74.                                                         return 0;

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

  76.     }

  77.     return AVERROR(EINVAL);

  78. }

  79. 

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

  81. {

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

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

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

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

  86.         return AVERROR(ERANGE);

  87.     }

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

  89.         double d = num*intnum/den;

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

  91.             av_log(obj, AV_LOG_ERROR,

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

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

  94.             return AVERROR(ERANGE);

  95.         }

  96.     }

  97. 

  98.     switch (o->type) {

  99.     case AV_OPT_TYPE_FLAGS:

  100.     case AV_OPT_TYPE_PIXEL_FMT:

  101.     case AV_OPT_TYPE_SAMPLE_FMT:

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

  103.     case AV_OPT_TYPE_DURATION:

  104.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

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

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

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

  108.     case AV_OPT_TYPE_RATIONAL:

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

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

  111.         break;

  112.     default:

  113.         return AVERROR(EINVAL);

  114.     }

  115.     return 0;

  116. }

  117. 

  118. static int hexchar2int(char c) {

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

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

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

  122.     return -1;

  123. }

  124. 

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

  126. {

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

  128.     uint8_t *bin, *ptr;

  129.     int len;

  130. 

  131.     av_freep(dst);

  132.     *lendst = 0;

  133. 

  134.     if (!val || !(len = strlen(val)))

  135.         return 0;

  136. 

  137.     if (len & 1)

  138.         return AVERROR(EINVAL);

  139.     len /= 2;

  140. 

  141.     ptr = bin = av_malloc(len);

  142.     while (*val) {

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

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

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

  146.             av_free(bin);

  147.             return AVERROR(EINVAL);

  148.         }

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

  150.     }

  151.     *dst = bin;

  152.     *lendst = len;

  153. 

  154.     return 0;

  155. }

  156. 

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

  158. {

  159.     av_freep(dst);

  160.     *dst = av_strdup(val);

  161.     return 0;

  162. }

  163. 

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

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

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

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

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

  169. 

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

  171. {

  172.     int ret = 0;

  173.     int num, den;

  174.     char c;

  175. 

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

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

  178.             return ret;

  179.         ret = 0;

  180.     }

  181. 

  182.     for (;;) {

  183.         int i = 0;

  184.         char buf[256];

  185.         int cmd = 0;

  186.         double d;

  187.         int64_t intnum = 1;

  188. 

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

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

  191.                 cmd = *(val++);

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

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

  194.             buf[i] = 0;

  195.         }

  196. 

  197.         {

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

  199.             int res;

  200.             int ci = 0;

  201.             double const_values[64];

  202.             const char * const_names[64];

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

  204.                 d = DEFAULT_NUMVAL(o_named);

  205.             else {

  206.                 if (o->unit) {

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

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

  209.                             o_named->unit &&

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

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

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

  213.                                 return AVERROR_PATCHWELCOME;

  214.                             }

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

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

  217.                         }

  218.                     }

  219.                 }

  220.                 const_names [ci  ] = "default";

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

  222.                 const_names [ci  ] = "max";

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

  224.                 const_names [ci  ] = "min";

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

  226.                 const_names [ci  ] = "none";

  227.                 const_values[ci++] = 0;

  228.                 const_names [ci  ] = "all";

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

  230.                 const_names [ci] = NULL;

  231.                 const_values[ci] = 0;

  232. 

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

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

  235.                 if (res < 0) {

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

  237.                     return res;

  238.                 }

  239.             }

  240.         }

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

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

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

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

  245.         }

  246. 

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

  248.             return ret;

  249.         val += i;

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

  251.             return 0;

  252.     }

  253. 

  254.     return 0;

  255. }

  256. 

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

  258. {

  259.     int ret;

  260. 

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

  262.         dst[0] =

  263.         dst[1] = 0;

  264.         return 0;

  265.     }

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

  267.     if (ret < 0)

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

  269.     return ret;

  270. }

  271. 

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

  273. {

  274.     int ret;

  275.     if (!val) {

  276.         ret = AVERROR(EINVAL);

  277.     } else {

  278.         ret = av_parse_video_rate(dst, val);

  279.     }

  280.     if (ret < 0)

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

  282.     return ret;

  283. }

  284. 

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

  286. {

  287.     int ret;

  288. 

  289.     if (!val) {

  290.         return 0;

  291.     } else {

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

  293.         if (ret < 0)

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

  295.         return ret;

  296.     }

  297.     return 0;

  298. }

  299. 

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

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

  302. {

  303.     int fmt, min, max;

  304. 

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

  306.         fmt = -1;

  307.     } else {

  308.         fmt = get_fmt(val);

  309.         if (fmt == -1) {

  310.             char *tail;

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

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

  313.                 av_log(obj, AV_LOG_ERROR,

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

  315.                 return AVERROR(EINVAL);

  316.             }

  317.         }

  318.     }

  319. 

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

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

  322. 

  323.     // hack for compatibility with old ffmpeg

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

  325.         min = -1;

  326.         max = fmt_nb-1;

  327.     }

  328. 

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

  330.         av_log(obj, AV_LOG_ERROR,

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

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

  333.         return AVERROR(ERANGE);

  334.     }

  335. 

  336.     *(int *)dst = fmt;

  337.     return 0;

  338. }

  339. 

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

  341. {

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

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

  344. }

  345. 

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

  347. {

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

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

  350. }

  351. 

  352. #if FF_API_OLD_AVOPTIONS

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

  354. {

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

  356.     if (o_out)

  357.         *o_out = o;

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

  359. }

  360. #endif

  361. 

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

  363. {

  364.     int ret = 0;

  365.     void *dst, *target_obj;

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

  367.     if (!o || !target_obj)

  368.         return AVERROR_OPTION_NOT_FOUND;

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

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

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

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

  373.                  o->type != AV_OPT_TYPE_CHANNEL_LAYOUT))

  374.         return AVERROR(EINVAL);

  375. 

  376.     if (o->flags & AV_OPT_FLAG_READONLY)

  377.         return AVERROR(EINVAL);

  378. 

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

  380.     switch (o->type) {

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

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

  383.     case AV_OPT_TYPE_FLAGS:

  384.     case AV_OPT_TYPE_INT:

  385.     case AV_OPT_TYPE_INT64:

  386.     case AV_OPT_TYPE_FLOAT:

  387.     case AV_OPT_TYPE_DOUBLE:

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

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

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

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

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

  393.     case AV_OPT_TYPE_DURATION:

  394.         if (!val) {

  395.             *(int64_t *)dst = 0;

  396.             return 0;

  397.         } else {

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

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

  400.             return ret;

  401.         }

  402.         break;

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

  404.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

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

  406.             *(int64_t *)dst = 0;

  407.         } else {

  408. #if FF_API_GET_CHANNEL_LAYOUT_COMPAT

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

  410. #else

  411.             int64_t cl = av_get_channel_layout(val);

  412. #endif

  413.             if (!cl) {

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

  415.                 ret = AVERROR(EINVAL);

  416.             }

  417.             *(int64_t *)dst = cl;

  418.             return ret;

  419.         }

  420.         break;

  421.     }

  422. 

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

  424.     return AVERROR(EINVAL);

  425. }

  426. 

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

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

  429.     {\

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

  431.             return AVERROR(EINVAL);\

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

  433.     }

  434. 

  435. OPT_EVAL_NUMBER(flags,  AV_OPT_TYPE_FLAGS,    int)

  436. OPT_EVAL_NUMBER(int,    AV_OPT_TYPE_INT,      int)

  437. OPT_EVAL_NUMBER(int64,  AV_OPT_TYPE_INT64,    int64_t)

  438. OPT_EVAL_NUMBER(float,  AV_OPT_TYPE_FLOAT,    float)

  439. OPT_EVAL_NUMBER(double, AV_OPT_TYPE_DOUBLE,   double)

  440. OPT_EVAL_NUMBER(q,      AV_OPT_TYPE_RATIONAL, AVRational)

  441. 

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

  443.                                   int search_flags)

  444. {

  445.     void *dst, *target_obj;

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

  447. 

  448.     if (!o || !target_obj)

  449.         return AVERROR_OPTION_NOT_FOUND;

  450. 

  451.     if (o->flags & AV_OPT_FLAG_READONLY)

  452.         return AVERROR(EINVAL);

  453. 

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

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

  456. }

  457. 

  458. #if FF_API_OLD_AVOPTIONS

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

  460. {

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

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

  463.         return NULL;

  464.     return o;

  465. }

  466. 

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

  468. {

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

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

  471.         return NULL;

  472.     return o;

  473. }

  474. 

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

  476. {

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

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

  479.         return NULL;

  480.     return o;

  481. }

  482. #endif

  483. 

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

  485. {

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

  487. }

  488. 

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

  490. {

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

  492. }

  493. 

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

  495. {

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

  497. }

  498. 

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

  500. {

  501.     void *target_obj;

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

  503.     uint8_t *ptr;

  504.     uint8_t **dst;

  505.     int *lendst;

  506. 

  507.     if (!o || !target_obj)

  508.         return AVERROR_OPTION_NOT_FOUND;

  509. 

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

  511.         return AVERROR(EINVAL);

  512. 

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

  514.     if (len && !ptr)

  515.         return AVERROR(ENOMEM);

  516. 

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

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

  519. 

  520.     av_free(*dst);

  521.     *dst = ptr;

  522.     *lendst = len;

  523.     if (len)

  524.         memcpy(ptr, val, len);

  525. 

  526.     return 0;

  527. }

  528. 

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

  530. {

  531.     void *target_obj;

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

  533. 

  534.     if (!o || !target_obj)

  535.         return AVERROR_OPTION_NOT_FOUND;

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

  537.         av_log(obj, AV_LOG_ERROR,

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

  539.         return AVERROR(EINVAL);

  540.     }

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

  542.         av_log(obj, AV_LOG_ERROR,

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

  544.         return AVERROR(EINVAL);

  545.     }

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

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

  548.     return 0;

  549. }

  550. 

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

  552. {

  553.     void *target_obj;

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

  555. 

  556.     if (!o || !target_obj)

  557.         return AVERROR_OPTION_NOT_FOUND;

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

  559.         av_log(obj, AV_LOG_ERROR,

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

  561.         return AVERROR(EINVAL);

  562.     }

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

  564.         return AVERROR(EINVAL);

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

  566. }

  567. 

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

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

  570. {

  571.     void *target_obj;

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

  573.                                      search_flags, &target_obj);

  574.     int min, max;

  575. 

  576.     if (!o || !target_obj)

  577.         return AVERROR_OPTION_NOT_FOUND;

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

  579.         av_log(obj, AV_LOG_ERROR,

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

  581.         return AVERROR(EINVAL);

  582.     }

  583. 

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

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

  586. 

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

  588.         av_log(obj, AV_LOG_ERROR,

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

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

  591.         return AVERROR(ERANGE);

  592.     }

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

  594.     return 0;

  595. }

  596. 

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

  598. {

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

  600. }

  601. 

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

  603. {

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

  605. }

  606. 

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

  608. {

  609.     void *target_obj;

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

  611. 

  612.     if (!o || !target_obj)

  613.         return AVERROR_OPTION_NOT_FOUND;

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

  615.         av_log(obj, AV_LOG_ERROR,

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

  617.         return AVERROR(EINVAL);

  618.     }

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

  620.     return 0;

  621. }

  622. 

  623. #if FF_API_OLD_AVOPTIONS

  624. /**

  625.  *

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

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

  628.  */

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

  630. {

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

  632.     void *dst;

  633.     uint8_t *bin;

  634.     int len, i;

  635.     if (!o)

  636.         return NULL;

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

  638.         return NULL;

  639. 

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

  641.     if (o_out) *o_out= o;

  642. 

  643.     switch (o->type) {

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

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

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

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

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

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

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

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

  652.     case AV_OPT_TYPE_BINARY:

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

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

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

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

  657.         break;

  658.     default: return NULL;

  659.     }

  660.     return buf;

  661. }

  662. #endif

  663. 

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

  665. {

  666.     void *target_obj;

  667.     AVDictionary **dst;

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

  669. 

  670.     if (!o || !target_obj)

  671.         return AVERROR_OPTION_NOT_FOUND;

  672.     if (o->flags & AV_OPT_FLAG_READONLY)

  673.         return AVERROR(EINVAL);

  674. 

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

  676.     av_dict_free(dst);

  677.     av_dict_copy(dst, val, 0);

  678. 

  679.     return 0;

  680. }

  681. 

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

  683. {

  684.     void *dst, *target_obj;

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

  686.     uint8_t *bin, buf[128];

  687.     int len, i, ret;

  688.     int64_t i64;

  689. 

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

  691.         return AVERROR_OPTION_NOT_FOUND;

  692. 

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

  694. 

  695.     buf[0] = 0;

  696.     switch (o->type) {

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

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

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

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

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

  702.     case AV_OPT_TYPE_VIDEO_RATE:

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

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

  705.     case AV_OPT_TYPE_STRING:

  706.         if (*(uint8_t**)dst)

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

  708.         else

  709.             *out_val = av_strdup("");

  710.         return 0;

  711.     case AV_OPT_TYPE_BINARY:

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

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

  714.             return AVERROR(EINVAL);

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

  716.             return AVERROR(ENOMEM);

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

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

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

  720.         return 0;

  721.     case AV_OPT_TYPE_IMAGE_SIZE:

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

  723.         break;

  724.     case AV_OPT_TYPE_PIXEL_FMT:

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

  726.         break;

  727.     case AV_OPT_TYPE_SAMPLE_FMT:

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

  729.         break;

  730.     case AV_OPT_TYPE_DURATION:

  731.         i64 = *(int64_t *)dst;

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

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

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

  735.         break;

  736.     case AV_OPT_TYPE_COLOR:

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

  738.         break;

  739.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  740.         i64 = *(int64_t *)dst;

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

  742.         break;

  743.     default:

  744.         return AVERROR(EINVAL);

  745.     }

  746. 

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

  748.         return AVERROR(EINVAL);

  749.     *out_val = av_strdup(buf);

  750.     return 0;

  751. }

  752. 

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

  754.                       int search_flags)

  755. {

  756.     void *dst, *target_obj;

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

  758.     if (!o || !target_obj)

  759.         goto error;

  760. 

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

  762. 

  763.     if (o_out) *o_out= o;

  764. 

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

  766. 

  767. error:

  768.     *den=*intnum=0;

  769.     return -1;

  770. }

  771. 

  772. #if FF_API_OLD_AVOPTIONS

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

  774. {

  775.     int64_t intnum=1;

  776.     double num=1;

  777.     int den=1;

  778. 

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

  780.         return NAN;

  781.     return num*intnum/den;

  782. }

  783. 

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

  785. {

  786.     int64_t intnum=1;

  787.     double num=1;

  788.     int den=1;

  789. 

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

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

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

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

  794.     else

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

  796. }

  797. 

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

  799. {

  800.     int64_t intnum=1;

  801.     double num=1;

  802.     int den=1;

  803. 

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

  805.         return -1;

  806.     return num*intnum/den;

  807. }

  808. #endif

  809. 

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

  811. {

  812.     int64_t intnum = 1;

  813.     double     num = 1;

  814.     int   ret, den = 1;

  815. 

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

  817.         return ret;

  818.     *out_val = num*intnum/den;

  819.     return 0;

  820. }

  821. 

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

  823. {

  824.     int64_t intnum = 1;

  825.     double     num = 1;

  826.     int   ret, den = 1;

  827. 

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

  829.         return ret;

  830.     *out_val = num*intnum/den;

  831.     return 0;

  832. }

  833. 

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

  835. {

  836.     int64_t intnum = 1;

  837.     double     num = 1;

  838.     int   ret, den = 1;

  839. 

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

  841.         return ret;

  842. 

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

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

  845.     else

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

  847.     return 0;

  848. }

  849. 

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

  851. {

  852.     void *dst, *target_obj;

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

  854.     if (!o || !target_obj)

  855.         return AVERROR_OPTION_NOT_FOUND;

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

  857.         av_log(obj, AV_LOG_ERROR,

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

  859.         return AVERROR(EINVAL);

  860.     }

  861. 

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

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

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

  865.     return 0;

  866. }

  867. 

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

  869. {

  870.     int64_t intnum = 1;

  871.     double     num = 1;

  872.     int   ret, den = 1;

  873. 

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

  875.         return ret;

  876. 

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

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

  879.     else

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

  881.     return 0;

  882. }

  883. 

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

  885.                       enum AVOptionType type, const char *desc)

  886. {

  887.     void *dst, *target_obj;

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

  889.     if (!o || !target_obj)

  890.         return AVERROR_OPTION_NOT_FOUND;

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

  892.         av_log(obj, AV_LOG_ERROR,

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

  894.         return AVERROR(EINVAL);

  895.     }

  896. 

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

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

  899.     return 0;

  900. }

  901. 

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

  903. {

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

  905. }

  906. 

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

  908. {

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

  910. }

  911. 

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

  913. {

  914.     void *dst, *target_obj;

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

  916.     if (!o || !target_obj)

  917.         return AVERROR_OPTION_NOT_FOUND;

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

  919.         av_log(obj, AV_LOG_ERROR,

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

  921.         return AVERROR(EINVAL);

  922.     }

  923. 

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

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

  926.     return 0;

  927. }

  928. 

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

  930. {

  931.     void *target_obj;

  932.     AVDictionary *src;

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

  934. 

  935.     if (!o || !target_obj)

  936.         return AVERROR_OPTION_NOT_FOUND;

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

  938.         return AVERROR(EINVAL);

  939. 

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

  941.     av_dict_copy(out_val, src, 0);

  942. 

  943.     return 0;

  944. }

  945. 

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

  947. {

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

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

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

  951.     int64_t res;

  952. 

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

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

  955.         return 0;

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

  957. }

  958. 

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

  960. {

  961.     if      (d == INT_MAX) {

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  987.     } else {

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

  989.     }

  990. }

  991. 

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

  993.                      int req_flags, int rej_flags)

  994. {

  995.     const AVOption *opt=NULL;

  996.     AVOptionRanges *r;

  997.     int i;

  998. 

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

  1000.         if (!(opt->flags & req_flags) || (opt->flags & rej_flags))

  1001.             continue;

  1002. 

  1003.         /* Don't print CONST's on level one.

  1004.          * Don't print anything but CONST's on level two.

  1005.          * Only print items from the requested unit.

  1006.          */

  1007.         if (!unit && opt->type==AV_OPT_TYPE_CONST)

  1008.             continue;

  1009.         else if (unit && opt->type!=AV_OPT_TYPE_CONST)

  1010.             continue;

  1011.         else if (unit && opt->type==AV_OPT_TYPE_CONST && strcmp(unit, opt->unit))

  1012.             continue;

  1013.         else if (unit && opt->type == AV_OPT_TYPE_CONST)

  1014.             av_log(av_log_obj, AV_LOG_INFO, "     %-15s ", opt->name);

  1015.         else

  1016.             av_log(av_log_obj, AV_LOG_INFO, "  %s%-17s ",

  1017.                    (opt->flags & AV_OPT_FLAG_FILTERING_PARAM) ? "" : "-",

  1018.                    opt->name);

  1019. 

  1020.         switch (opt->type) {

  1021.             case AV_OPT_TYPE_FLAGS:

  1022.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<flags>");

  1023.                 break;

  1024.             case AV_OPT_TYPE_INT:

  1025.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<int>");

  1026.                 break;

  1027.             case AV_OPT_TYPE_INT64:

  1028.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<int64>");

  1029.                 break;

  1030.             case AV_OPT_TYPE_DOUBLE:

  1031.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<double>");

  1032.                 break;

  1033.             case AV_OPT_TYPE_FLOAT:

  1034.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<float>");

  1035.                 break;

  1036.             case AV_OPT_TYPE_STRING:

  1037.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<string>");

  1038.                 break;

  1039.             case AV_OPT_TYPE_RATIONAL:

  1040.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<rational>");

  1041.                 break;

  1042.             case AV_OPT_TYPE_BINARY:

  1043.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<binary>");

  1044.                 break;

  1045.             case AV_OPT_TYPE_IMAGE_SIZE:

  1046.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<image_size>");

  1047.                 break;

  1048.             case AV_OPT_TYPE_VIDEO_RATE:

  1049.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<video_rate>");

  1050.                 break;

  1051.             case AV_OPT_TYPE_PIXEL_FMT:

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

  1053.                 break;

  1054.             case AV_OPT_TYPE_SAMPLE_FMT:

  1055.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<sample_fmt>");

  1056.                 break;

  1057.             case AV_OPT_TYPE_DURATION:

  1058.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<duration>");

  1059.                 break;

  1060.             case AV_OPT_TYPE_COLOR:

  1061.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<color>");

  1062.                 break;

  1063.             case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1064.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<channel_layout>");

  1065.                 break;

  1066.             case AV_OPT_TYPE_CONST:

  1067.             default:

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

  1069.                 break;

  1070.         }

  1071.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_ENCODING_PARAM) ? 'E' : '.');

  1072.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_DECODING_PARAM) ? 'D' : '.');

  1073.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_FILTERING_PARAM)? 'F' : '.');

  1074.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_VIDEO_PARAM   ) ? 'V' : '.');

  1075.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_AUDIO_PARAM   ) ? 'A' : '.');

  1076.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_SUBTITLE_PARAM) ? 'S' : '.');

  1077.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_EXPORT)         ? 'X' : '.');

  1078.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_READONLY)       ? 'R' : '.');

  1079. 

  1080.         if (opt->help)

  1081.             av_log(av_log_obj, AV_LOG_INFO, " %s", opt->help);

  1082. 

  1083.         if (av_opt_query_ranges(&r, obj, opt->name, AV_OPT_SEARCH_FAKE_OBJ) >= 0) {

  1084.             switch (opt->type) {

  1085.             case AV_OPT_TYPE_INT:

  1086.             case AV_OPT_TYPE_INT64:

  1087.             case AV_OPT_TYPE_DOUBLE:

  1088.             case AV_OPT_TYPE_FLOAT:

  1089.             case AV_OPT_TYPE_RATIONAL:

  1090.                 for (i = 0; i < r->nb_ranges; i++) {

  1091.                     av_log(av_log_obj, AV_LOG_INFO, " (from ");

  1092.                     log_value(av_log_obj, AV_LOG_INFO, r->range[i]->value_min);

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

  1094.                     log_value(av_log_obj, AV_LOG_INFO, r->range[i]->value_max);

  1095.                     av_log(av_log_obj, AV_LOG_INFO, ")");

  1096.                 }

  1097.                 break;

  1098.             }

  1099.             av_opt_freep_ranges(&r);

  1100.         }

  1101. 

  1102.         if (opt->type != AV_OPT_TYPE_CONST  &&

  1103.             opt->type != AV_OPT_TYPE_BINARY &&

  1104.                 !((opt->type == AV_OPT_TYPE_COLOR      ||

  1105.                    opt->type == AV_OPT_TYPE_IMAGE_SIZE ||

  1106.                    opt->type == AV_OPT_TYPE_STRING     ||

  1107.                    opt->type == AV_OPT_TYPE_VIDEO_RATE) &&

  1108.                   !opt->default_val.str)) {

  1109.             av_log(av_log_obj, AV_LOG_INFO, " (default ");

  1110.             switch (opt->type) {

  1111.             case AV_OPT_TYPE_FLAGS:

  1112.                 av_log(av_log_obj, AV_LOG_INFO, "%"PRIX64, opt->default_val.i64);

  1113.                 break;

  1114.             case AV_OPT_TYPE_DURATION:

  1115.             case AV_OPT_TYPE_INT:

  1116.             case AV_OPT_TYPE_INT64:

  1117.                 log_value(av_log_obj, AV_LOG_INFO, opt->default_val.i64);

  1118.                 break;

  1119.             case AV_OPT_TYPE_DOUBLE:

  1120.             case AV_OPT_TYPE_FLOAT:

  1121.                 log_value(av_log_obj, AV_LOG_INFO, opt->default_val.dbl);

  1122.                 break;

  1123.             case AV_OPT_TYPE_RATIONAL: {

  1124.                 AVRational q = av_d2q(opt->default_val.dbl, INT_MAX);

  1125.                 av_log(av_log_obj, AV_LOG_INFO, "%d/%d", q.num, q.den); }

  1126.                 break;

  1127.             case AV_OPT_TYPE_PIXEL_FMT:

  1128.                 av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(av_get_pix_fmt_name(opt->default_val.i64), "none"));

  1129.                 break;

  1130.             case AV_OPT_TYPE_SAMPLE_FMT:

  1131.                 av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(av_get_sample_fmt_name(opt->default_val.i64), "none"));

  1132.                 break;

  1133.             case AV_OPT_TYPE_COLOR:

  1134.             case AV_OPT_TYPE_IMAGE_SIZE:

  1135.             case AV_OPT_TYPE_STRING:

  1136.             case AV_OPT_TYPE_VIDEO_RATE:

  1137.                 av_log(av_log_obj, AV_LOG_INFO, "\"%s\"", opt->default_val.str);

  1138.                 break;

  1139.             case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1140.                 av_log(av_log_obj, AV_LOG_INFO, "0x%"PRIx64, opt->default_val.i64);

  1141.                 break;

  1142.             }

  1143.             av_log(av_log_obj, AV_LOG_INFO, ")");

  1144.         }

  1145. 

  1146.         av_log(av_log_obj, AV_LOG_INFO, "\n");

  1147.         if (opt->unit && opt->type != AV_OPT_TYPE_CONST) {

  1148.             opt_list(obj, av_log_obj, opt->unit, req_flags, rej_flags);

  1149.         }

  1150.     }

  1151. }

  1152. 

  1153. int av_opt_show2(void *obj, void *av_log_obj, int req_flags, int rej_flags)

  1154. {

  1155.     if (!obj)

  1156.         return -1;

  1157. 

  1158.     av_log(av_log_obj, AV_LOG_INFO, "%s AVOptions:\n", (*(AVClass**)obj)->class_name);

  1159. 

  1160.     opt_list(obj, av_log_obj, NULL, req_flags, rej_flags);

  1161. 

  1162.     return 0;

  1163. }

  1164. 

  1165. void av_opt_set_defaults(void *s)

  1166. {

  1167. #if FF_API_OLD_AVOPTIONS

  1168.     av_opt_set_defaults2(s, 0, 0);

  1169. }

  1170. 

  1171. void av_opt_set_defaults2(void *s, int mask, int flags)

  1172. {

  1173. #endif

  1174.     const AVOption *opt = NULL;

  1175.     while ((opt = av_opt_next(s, opt))) {

  1176.         void *dst = ((uint8_t*)s) + opt->offset;

  1177. #if FF_API_OLD_AVOPTIONS

  1178.         if ((opt->flags & mask) != flags)

  1179.             continue;

  1180. #endif

  1181. 

  1182.         if (opt->flags & AV_OPT_FLAG_READONLY)

  1183.             continue;

  1184. 

  1185.         switch (opt->type) {

  1186.             case AV_OPT_TYPE_CONST:

  1187.                 /* Nothing to be done here */

  1188.             break;

  1189.             case AV_OPT_TYPE_FLAGS:

  1190.             case AV_OPT_TYPE_INT:

  1191.             case AV_OPT_TYPE_INT64:

  1192.             case AV_OPT_TYPE_DURATION:

  1193.             case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1194.                 write_number(s, opt, dst, 1, 1, opt->default_val.i64);

  1195.             break;

  1196.             case AV_OPT_TYPE_DOUBLE:

  1197.             case AV_OPT_TYPE_FLOAT: {

  1198.                 double val;

  1199.                 val = opt->default_val.dbl;

  1200.                 write_number(s, opt, dst, val, 1, 1);

  1201.             }

  1202.             break;

  1203.             case AV_OPT_TYPE_RATIONAL: {

  1204.                 AVRational val;

  1205.                 val = av_d2q(opt->default_val.dbl, INT_MAX);

  1206.                 write_number(s, opt, dst, 1, val.den, val.num);

  1207.             }

  1208.             break;

  1209.             case AV_OPT_TYPE_COLOR:

  1210.                 set_string_color(s, opt, opt->default_val.str, dst);

  1211.                 break;

  1212.             case AV_OPT_TYPE_STRING:

  1213.                 set_string(s, opt, opt->default_val.str, dst);

  1214.                 break;

  1215.             case AV_OPT_TYPE_IMAGE_SIZE:

  1216.                 set_string_image_size(s, opt, opt->default_val.str, dst);

  1217.                 break;

  1218.             case AV_OPT_TYPE_VIDEO_RATE:

  1219.                 set_string_video_rate(s, opt, opt->default_val.str, dst);

  1220.                 break;

  1221.             case AV_OPT_TYPE_PIXEL_FMT:

  1222.                 write_number(s, opt, dst, 1, 1, opt->default_val.i64);

  1223.                 break;

  1224.             case AV_OPT_TYPE_SAMPLE_FMT:

  1225.                 write_number(s, opt, dst, 1, 1, opt->default_val.i64);

  1226.                 break;

  1227.             case AV_OPT_TYPE_BINARY:

  1228.             case AV_OPT_TYPE_DICT:

  1229.                 /* Cannot set defaults for these types */

  1230.             break;

  1231.             default:

  1232.                 av_log(s, AV_LOG_DEBUG, "AVOption type %d of option %s not implemented yet\n", opt->type, opt->name);

  1233.         }

  1234.     }

  1235. }

  1236. 

  1237. /**

  1238.  * Store the value in the field in ctx that is named like key.

  1239.  * ctx must be an AVClass context, storing is done using AVOptions.

  1240.  *

  1241.  * @param buf the string to parse, buf will be updated to point at the

  1242.  * separator just after the parsed key/value pair

  1243.  * @param key_val_sep a 0-terminated list of characters used to

  1244.  * separate key from value

  1245.  * @param pairs_sep a 0-terminated list of characters used to separate

  1246.  * two pairs from each other

  1247.  * @return 0 if the key/value pair has been successfully parsed and

  1248.  * set, or a negative value corresponding to an AVERROR code in case

  1249.  * of error:

  1250.  * AVERROR(EINVAL) if the key/value pair cannot be parsed,

  1251.  * the error code issued by av_opt_set() if the key/value pair

  1252.  * cannot be set

  1253.  */

  1254. static int parse_key_value_pair(void *ctx, const char **buf,

  1255.                                 const char *key_val_sep, const char *pairs_sep)

  1256. {

  1257.     char *key = av_get_token(buf, key_val_sep);

  1258.     char *val;

  1259.     int ret;

  1260. 

  1261.     if (!key)

  1262.         return AVERROR(ENOMEM);

  1263. 

  1264.     if (*key && strspn(*buf, key_val_sep)) {

  1265.         (*buf)++;

  1266.         val = av_get_token(buf, pairs_sep);

  1267.         if (!val) {

  1268.             av_freep(&key);

  1269.             return AVERROR(ENOMEM);

  1270.         }

  1271.     } else {

  1272.         av_log(ctx, AV_LOG_ERROR, "Missing key or no key/value separator found after key '%s'\n", key);

  1273.         av_free(key);

  1274.         return AVERROR(EINVAL);

  1275.     }

  1276. 

  1277.     av_log(ctx, AV_LOG_DEBUG, "Setting entry with key '%s' to value '%s'\n", key, val);

  1278. 

  1279.     ret = av_opt_set(ctx, key, val, AV_OPT_SEARCH_CHILDREN);

  1280.     if (ret == AVERROR_OPTION_NOT_FOUND)

  1281.         av_log(ctx, AV_LOG_ERROR, "Key '%s' not found.\n", key);

  1282. 

  1283.     av_free(key);

  1284.     av_free(val);

  1285.     return ret;

  1286. }

  1287. 

  1288. int av_set_options_string(void *ctx, const char *opts,

  1289.                           const char *key_val_sep, const char *pairs_sep)

  1290. {

  1291.     int ret, count = 0;

  1292. 

  1293.     if (!opts)

  1294.         return 0;

  1295. 

  1296.     while (*opts) {

  1297.         if ((ret = parse_key_value_pair(ctx, &opts, key_val_sep, pairs_sep)) < 0)

  1298.             return ret;

  1299.         count++;

  1300. 

  1301.         if (*opts)

  1302.             opts++;

  1303.     }

  1304. 

  1305.     return count;

  1306. }

  1307. 

  1308. #define WHITESPACES " \n\t"

  1309. 

  1310. static int is_key_char(char c)

  1311. {

  1312.     return (unsigned)((c | 32) - 'a') < 26 ||

  1313.            (unsigned)(c - '0') < 10 ||

  1314.            c == '-' || c == '_' || c == '/' || c == '.';

  1315. }

  1316. 

  1317. /**

  1318.  * Read a key from a string.

  1319.  *

  1320.  * The key consists of is_key_char characters and must be terminated by a

  1321.  * character from the delim string; spaces are ignored.

  1322.  *

  1323.  * @return  0 for success (even with ellipsis), <0 for failure

  1324.  */

  1325. static int get_key(const char **ropts, const char *delim, char **rkey)

  1326. {

  1327.     const char *opts = *ropts;

  1328.     const char *key_start, *key_end;

  1329. 

  1330.     key_start = opts += strspn(opts, WHITESPACES);

  1331.     while (is_key_char(*opts))

  1332.         opts++;

  1333.     key_end = opts;

  1334.     opts += strspn(opts, WHITESPACES);

  1335.     if (!*opts || !strchr(delim, *opts))

  1336.         return AVERROR(EINVAL);

  1337.     opts++;

  1338.     if (!(*rkey = av_malloc(key_end - key_start + 1)))

  1339.         return AVERROR(ENOMEM);

  1340.     memcpy(*rkey, key_start, key_end - key_start);

  1341.     (*rkey)[key_end - key_start] = 0;

  1342.     *ropts = opts;

  1343.     return 0;

  1344. }

  1345. 

  1346. int av_opt_get_key_value(const char **ropts,

  1347.                          const char *key_val_sep, const char *pairs_sep,

  1348.                          unsigned flags,

  1349.                          char **rkey, char **rval)

  1350. {

  1351.     int ret;

  1352.     char *key = NULL, *val;

  1353.     const char *opts = *ropts;

  1354. 

  1355.     if ((ret = get_key(&opts, key_val_sep, &key)) < 0 &&

  1356.         !(flags & AV_OPT_FLAG_IMPLICIT_KEY))

  1357.         return AVERROR(EINVAL);

  1358.     if (!(val = av_get_token(&opts, pairs_sep))) {

  1359.         av_free(key);

  1360.         return AVERROR(ENOMEM);

  1361.     }

  1362.     *ropts = opts;

  1363.     *rkey  = key;

  1364.     *rval  = val;

  1365.     return 0;

  1366. }

  1367. 

  1368. int av_opt_set_from_string(void *ctx, const char *opts,

  1369.                            const char *const *shorthand,

  1370.                            const char *key_val_sep, const char *pairs_sep)

  1371. {

  1372.     int ret, count = 0;

  1373.     const char *dummy_shorthand = NULL;

  1374.     char *av_uninit(parsed_key), *av_uninit(value);

  1375.     const char *key;

  1376. 

  1377.     if (!opts)

  1378.         return 0;

  1379.     if (!shorthand)

  1380.         shorthand = &dummy_shorthand;

  1381. 

  1382.     while (*opts) {

  1383.         ret = av_opt_get_key_value(&opts, key_val_sep, pairs_sep,

  1384.                                    *shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,

  1385.                                    &parsed_key, &value);

  1386.         if (ret < 0) {

  1387.             if (ret == AVERROR(EINVAL))

  1388.                 av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", opts);

  1389.             else

  1390.                 av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", opts,

  1391.                        av_err2str(ret));

  1392.             return ret;

  1393.         }

  1394.         if (*opts)

  1395.             opts++;

  1396.         if (parsed_key) {

  1397.             key = parsed_key;

  1398.             while (*shorthand) /* discard all remaining shorthand */

  1399.                 shorthand++;

  1400.         } else {

  1401.             key = *(shorthand++);

  1402.         }

  1403. 

  1404.         av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);

  1405.         if ((ret = av_opt_set(ctx, key, value, 0)) < 0) {

  1406.             if (ret == AVERROR_OPTION_NOT_FOUND)

  1407.                 av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);

  1408.             av_free(value);

  1409.             av_free(parsed_key);

  1410.             return ret;

  1411.         }

  1412. 

  1413.         av_free(value);

  1414.         av_free(parsed_key);

  1415.         count++;

  1416.     }

  1417.     return count;

  1418. }

  1419. 

  1420. void av_opt_free(void *obj)

  1421. {

  1422.     const AVOption *o = NULL;

  1423.     while ((o = av_opt_next(obj, o))) {

  1424.         switch (o->type) {

  1425.         case AV_OPT_TYPE_STRING:

  1426.         case AV_OPT_TYPE_BINARY:

  1427.             av_freep((uint8_t *)obj + o->offset);

  1428.             break;

  1429. 

  1430.         case AV_OPT_TYPE_DICT:

  1431.             av_dict_free((AVDictionary **)(((uint8_t *)obj) + o->offset));

  1432.             break;

  1433. 

  1434.         default:

  1435.             break;

  1436.         }

  1437.     }

  1438. }

  1439. 

  1440. int av_opt_set_dict2(void *obj, AVDictionary **options, int search_flags)

  1441. {

  1442.     AVDictionaryEntry *t = NULL;

  1443.     AVDictionary    *tmp = NULL;

  1444.     int ret = 0;

  1445. 

  1446.     if (!options)

  1447.         return 0;

  1448. 

  1449.     while ((t = av_dict_get(*options, "", t, AV_DICT_IGNORE_SUFFIX))) {

  1450.         ret = av_opt_set(obj, t->key, t->value, search_flags);

  1451.         if (ret == AVERROR_OPTION_NOT_FOUND)

  1452.             av_dict_set(&tmp, t->key, t->value, 0);

  1453.         else if (ret < 0) {

  1454.             av_log(obj, AV_LOG_ERROR, "Error setting option %s to value %s.\n", t->key, t->value);

  1455.             break;

  1456.         }

  1457.         ret = 0;

  1458.     }

  1459.     av_dict_free(options);

  1460.     *options = tmp;

  1461.     return ret;

  1462. }

  1463. 

  1464. int av_opt_set_dict(void *obj, AVDictionary **options)

  1465. {

  1466.     return av_opt_set_dict2(obj, options, 0);

  1467. }

  1468. 

  1469. const AVOption *av_opt_find(void *obj, const char *name, const char *unit,

  1470.                             int opt_flags, int search_flags)

  1471. {

  1472.     return av_opt_find2(obj, name, unit, opt_flags, search_flags, NULL);

  1473. }

  1474. 

  1475. const AVOption *av_opt_find2(void *obj, const char *name, const char *unit,

  1476.                              int opt_flags, int search_flags, void **target_obj)

  1477. {

  1478.     const AVClass  *c;

  1479.     const AVOption *o = NULL;

  1480. 

  1481.     if(!obj)

  1482.         return NULL;

  1483. 

  1484.     c= *(AVClass**)obj;

  1485. 

  1486.     if (!c)

  1487.         return NULL;

  1488. 

  1489.     if (search_flags & AV_OPT_SEARCH_CHILDREN) {

  1490.         if (search_flags & AV_OPT_SEARCH_FAKE_OBJ) {

  1491.             const AVClass *child = NULL;

  1492.             while (child = av_opt_child_class_next(c, child))

  1493.                 if (o = av_opt_find2(&child, name, unit, opt_flags, search_flags, NULL))

  1494.                     return o;

  1495.         } else {

  1496.             void *child = NULL;

  1497.             while (child = av_opt_child_next(obj, child))

  1498.                 if (o = av_opt_find2(child, name, unit, opt_flags, search_flags, target_obj))

  1499.                     return o;

  1500.         }

  1501.     }

  1502. 

  1503.     while (o = av_opt_next(obj, o)) {

  1504.         if (!strcmp(o->name, name) && (o->flags & opt_flags) == opt_flags &&

  1505.             ((!unit && o->type != AV_OPT_TYPE_CONST) ||

  1506.              (unit  && o->type == AV_OPT_TYPE_CONST && o->unit && !strcmp(o->unit, unit)))) {

  1507.             if (target_obj) {

  1508.                 if (!(search_flags & AV_OPT_SEARCH_FAKE_OBJ))

  1509.                     *target_obj = obj;

  1510.                 else

  1511.                     *target_obj = NULL;

  1512.             }

  1513.             return o;

  1514.         }

  1515.     }

  1516.     return NULL;

  1517. }

  1518. 

  1519. void *av_opt_child_next(void *obj, void *prev)

  1520. {

  1521.     const AVClass *c = *(AVClass**)obj;

  1522.     if (c->child_next)

  1523.         return c->child_next(obj, prev);

  1524.     return NULL;

  1525. }

  1526. 

  1527. const AVClass *av_opt_child_class_next(const AVClass *parent, const AVClass *prev)

  1528. {

  1529.     if (parent->child_class_next)

  1530.         return parent->child_class_next(prev);

  1531.     return NULL;

  1532. }

  1533. 

  1534. void *av_opt_ptr(const AVClass *class, void *obj, const char *name)

  1535. {

  1536.     const AVOption *opt= av_opt_find2(&class, name, NULL, 0, AV_OPT_SEARCH_FAKE_OBJ, NULL);

  1537.     if(!opt)

  1538.         return NULL;

  1539.     return (uint8_t*)obj + opt->offset;

  1540. }

  1541. 

  1542. static int opt_size(enum AVOptionType type)

  1543. {

  1544.     switch(type) {

  1545.     case AV_OPT_TYPE_INT:

  1546.     case AV_OPT_TYPE_FLAGS:     return sizeof(int);

  1547.     case AV_OPT_TYPE_DURATION:

  1548.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1549.     case AV_OPT_TYPE_INT64:     return sizeof(int64_t);

  1550.     case AV_OPT_TYPE_DOUBLE:    return sizeof(double);

  1551.     case AV_OPT_TYPE_FLOAT:     return sizeof(float);

  1552.     case AV_OPT_TYPE_STRING:    return sizeof(uint8_t*);

  1553.     case AV_OPT_TYPE_VIDEO_RATE:

  1554.     case AV_OPT_TYPE_RATIONAL:  return sizeof(AVRational);

  1555.     case AV_OPT_TYPE_BINARY:    return sizeof(uint8_t*) + sizeof(int);

  1556.     case AV_OPT_TYPE_IMAGE_SIZE:return sizeof(int[2]);

  1557.     case AV_OPT_TYPE_PIXEL_FMT: return sizeof(enum AVPixelFormat);

  1558.     case AV_OPT_TYPE_SAMPLE_FMT:return sizeof(enum AVSampleFormat);

  1559.     case AV_OPT_TYPE_COLOR:     return 4;

  1560.     }

  1561.     return 0;

  1562. }

  1563. 

  1564. int av_opt_copy(void *dst, void *src)

  1565. {

  1566.     const AVOption *o = NULL;

  1567.     const AVClass *c;

  1568.     int ret = 0;

  1569. 

  1570.     if (!src)

  1571.         return 0;

  1572. 

  1573.     c = *(AVClass**)src;

  1574.     if (*(AVClass**)dst && c != *(AVClass**)dst)

  1575.         return AVERROR(EINVAL);

  1576. 

  1577.     while ((o = av_opt_next(src, o))) {

  1578.         void *field_dst = ((uint8_t*)dst) + o->offset;

  1579.         void *field_src = ((uint8_t*)src) + o->offset;

  1580.         uint8_t **field_dst8 = (uint8_t**)field_dst;

  1581.         uint8_t **field_src8 = (uint8_t**)field_src;

  1582. 

  1583.         if (o->type == AV_OPT_TYPE_STRING) {

  1584.             if (*field_dst8 != *field_src8)

  1585.                 av_freep(field_dst8);

  1586.             *field_dst8 = av_strdup(*field_src8);

  1587.             if (*field_src8 && !*field_dst8)

  1588.                 ret = AVERROR(ENOMEM);

  1589.         } else if (o->type == AV_OPT_TYPE_BINARY) {

  1590.             int len = *(int*)(field_src8 + 1);

  1591.             if (*field_dst8 != *field_src8)

  1592.                 av_freep(field_dst8);

  1593.             *field_dst8 = av_memdup(*field_src8, len);

  1594.             if (len && !*field_dst8) {

  1595.                 ret = AVERROR(ENOMEM);

  1596.                 len = 0;

  1597.             }

  1598.             *(int*)(field_dst8 + 1) = len;

  1599.         } else if (o->type == AV_OPT_TYPE_CONST) {

  1600.             // do nothing

  1601.         } else if (o->type == AV_OPT_TYPE_DICT) {

  1602.             AVDictionary **sdict = (AVDictionary **) field_src;

  1603.             AVDictionary **ddict = (AVDictionary **) field_dst;

  1604.             if (*sdict != *ddict)

  1605.                 av_dict_free(ddict);

  1606.             *ddict = NULL;

  1607.             av_dict_copy(ddict, *sdict, 0);

  1608.             if (av_dict_count(*sdict) != av_dict_count(*ddict))

  1609.                 ret = AVERROR(ENOMEM);

  1610.         } else {

  1611.             memcpy(field_dst, field_src, opt_size(o->type));

  1612.         }

  1613.     }

  1614.     return ret;

  1615. }

  1616. 

  1617. int av_opt_query_ranges(AVOptionRanges **ranges_arg, void *obj, const char *key, int flags)

  1618. {

  1619.     int ret;

  1620.     const AVClass *c = *(AVClass**)obj;

  1621.     int (*callback)(AVOptionRanges **, void *obj, const char *key, int flags) = NULL;

  1622. 

  1623.     if (c->version > (52 << 16 | 11 << 8))

  1624.         callback = c->query_ranges;

  1625. 

  1626.     if (!callback)

  1627.         callback = av_opt_query_ranges_default;

  1628. 

  1629.     ret = callback(ranges_arg, obj, key, flags);

  1630.     if (ret >= 0) {

  1631.         if (!(flags & AV_OPT_MULTI_COMPONENT_RANGE))

  1632.             ret = 1;

  1633.         (*ranges_arg)->nb_components = ret;

  1634.     }

  1635.     return ret;

  1636. }

  1637. 

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

  1639. {

  1640.     AVOptionRanges *ranges = av_mallocz(sizeof(*ranges));

  1641.     AVOptionRange **range_array = av_mallocz(sizeof(void*));

  1642.     AVOptionRange *range = av_mallocz(sizeof(*range));

  1643.     const AVOption *field = av_opt_find(obj, key, NULL, 0, flags);

  1644.     int ret;

  1645. 

  1646.     *ranges_arg = NULL;

  1647. 

  1648.     if (!ranges || !range || !range_array || !field) {

  1649.         ret = AVERROR(ENOMEM);

  1650.         goto fail;

  1651.     }

  1652. 

  1653.     ranges->range = range_array;

  1654.     ranges->range[0] = range;

  1655.     ranges->nb_ranges = 1;

  1656.     ranges->nb_components = 1;

  1657.     range->is_range = 1;

  1658.     range->value_min = field->min;

  1659.     range->value_max = field->max;

  1660. 

  1661.     switch (field->type) {

  1662.     case AV_OPT_TYPE_INT:

  1663.     case AV_OPT_TYPE_INT64:

  1664.     case AV_OPT_TYPE_PIXEL_FMT:

  1665.     case AV_OPT_TYPE_SAMPLE_FMT:

  1666.     case AV_OPT_TYPE_FLOAT:

  1667.     case AV_OPT_TYPE_DOUBLE:

  1668.     case AV_OPT_TYPE_DURATION:

  1669.     case AV_OPT_TYPE_COLOR:

  1670.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1671.         break;

  1672.     case AV_OPT_TYPE_STRING:

  1673.         range->component_min = 0;

  1674.         range->component_max = 0x10FFFF; // max unicode value

  1675.         range->value_min = -1;

  1676.         range->value_max = INT_MAX;

  1677.         break;

  1678.     case AV_OPT_TYPE_RATIONAL:

  1679.         range->component_min = INT_MIN;

  1680.         range->component_max = INT_MAX;

  1681.         break;

  1682.     case AV_OPT_TYPE_IMAGE_SIZE:

  1683.         range->component_min = 0;

  1684.         range->component_max = INT_MAX/128/8;

  1685.         range->value_min = 0;

  1686.         range->value_max = INT_MAX/8;

  1687.         break;

  1688.     case AV_OPT_TYPE_VIDEO_RATE:

  1689.         range->component_min = 1;

  1690.         range->component_max = INT_MAX;

  1691.         range->value_min = 1;

  1692.         range->value_max = INT_MAX;

  1693.         break;

  1694.     default:

  1695.         ret = AVERROR(ENOSYS);

  1696.         goto fail;

  1697.     }

  1698. 

  1699.     *ranges_arg = ranges;

  1700.     return 1;

  1701. fail:

  1702.     av_free(ranges);

  1703.     av_free(range);

  1704.     av_free(range_array);

  1705.     return ret;

  1706. }

  1707. 

  1708. void av_opt_freep_ranges(AVOptionRanges **rangesp)

  1709. {

  1710.     int i;

  1711.     AVOptionRanges *ranges = *rangesp;

  1712. 

  1713.     if (!ranges)

  1714.         return;

  1715. 

  1716.     for (i = 0; i < ranges->nb_ranges * ranges->nb_components; i++) {

  1717.         AVOptionRange *range = ranges->range[i];

  1718.         if (range) {

  1719.             av_freep(&range->str);

  1720.             av_freep(&ranges->range[i]);

  1721.         }

  1722.     }

  1723.     av_freep(&ranges->range);

  1724.     av_freep(rangesp);

  1725. }

  1726. 

  1727. #ifdef TEST

  1728. 

  1729. typedef struct TestContext

  1730. {

  1731.     const AVClass *class;

  1732.     int num;

  1733.     int toggle;

  1734.     char *string;

  1735.     int flags;

  1736.     AVRational rational;

  1737.     AVRational video_rate;

  1738.     int w, h;

  1739.     enum AVPixelFormat pix_fmt;

  1740.     enum AVSampleFormat sample_fmt;

  1741.     int64_t duration;

  1742.     uint8_t color[4];

  1743.     int64_t channel_layout;

  1744. } TestContext;

  1745. 

  1746. #define OFFSET(x) offsetof(TestContext, x)

  1747. 

  1748. #define TEST_FLAG_COOL 01

  1749. #define TEST_FLAG_LAME 02

  1750. #define TEST_FLAG_MU   04

  1751. 

  1752. static const AVOption test_options[]= {

  1753. {"num",      "set num",        OFFSET(num),      AV_OPT_TYPE_INT,      {.i64 = 0},       0,        100                 },

  1754. {"toggle",   "set toggle",     OFFSET(toggle),   AV_OPT_TYPE_INT,      {.i64 = 0},       0,        1                   },

  1755. {"rational", "set rational",   OFFSET(rational), AV_OPT_TYPE_RATIONAL, {.dbl = 0},       0,        10                  },

  1756. {"string",   "set string",     OFFSET(string),   AV_OPT_TYPE_STRING,   {.str = "default"}, CHAR_MIN, CHAR_MAX          },

  1757. {"flags",    "set flags",      OFFSET(flags),    AV_OPT_TYPE_FLAGS,    {.i64 = 0},       0,        INT_MAX, 0, "flags" },

  1758. {"cool",     "set cool flag ", 0,                AV_OPT_TYPE_CONST,    {.i64 = TEST_FLAG_COOL}, INT_MIN,  INT_MAX, 0, "flags" },

  1759. {"lame",     "set lame flag ", 0,                AV_OPT_TYPE_CONST,    {.i64 = TEST_FLAG_LAME}, INT_MIN,  INT_MAX, 0, "flags" },

  1760. {"mu",       "set mu flag ",   0,                AV_OPT_TYPE_CONST,    {.i64 = TEST_FLAG_MU},   INT_MIN,  INT_MAX, 0, "flags" },

  1761. {"size",     "set size",       OFFSET(w),        AV_OPT_TYPE_IMAGE_SIZE,{0},             0,        0                   },

  1762. {"pix_fmt",  "set pixfmt",     OFFSET(pix_fmt),  AV_OPT_TYPE_PIXEL_FMT, {.i64 = AV_PIX_FMT_NONE}, -1, INT_MAX},

  1763. {"sample_fmt", "set samplefmt", OFFSET(sample_fmt), AV_OPT_TYPE_SAMPLE_FMT, {.i64 = AV_SAMPLE_FMT_NONE}, -1, INT_MAX},

  1764. {"video_rate", "set videorate", OFFSET(video_rate), AV_OPT_TYPE_VIDEO_RATE,  {.str = "25"}, 0,     0                   },

  1765. {"duration", "set duration",   OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, INT64_MAX},

  1766. {"color", "set color",   OFFSET(color), AV_OPT_TYPE_COLOR, {.str = "pink"}, 0, 0},

  1767. {"cl", "set channel layout", OFFSET(channel_layout), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64 = AV_CH_LAYOUT_HEXAGONAL}, 0, INT64_MAX},

  1768. {NULL},

  1769. };

  1770. 

  1771. static const char *test_get_name(void *ctx)

  1772. {

  1773.     return "test";

  1774. }

  1775. 

  1776. static const AVClass test_class = {

  1777.     "TestContext",

  1778.     test_get_name,

  1779.     test_options

  1780. };

  1781. 

  1782. int main(void)

  1783. {

  1784.     int i;

  1785. 

  1786.     printf("\nTesting av_set_options_string()\n");

  1787.     {

  1788.         TestContext test_ctx = { 0 };

  1789.         static const char * const options[] = {

  1790.             "",

  1791.             ":",

  1792.             "=",

  1793.             "foo=:",

  1794.             ":=foo",

  1795.             "=foo",

  1796.             "foo=",

  1797.             "foo",

  1798.             "foo=val",

  1799.             "foo==val",

  1800.             "toggle=:",

  1801.             "string=:",

  1802.             "toggle=1 : foo",

  1803.             "toggle=100",

  1804.             "toggle==1",

  1805.             "flags=+mu-lame : num=42: toggle=0",

  1806.             "num=42 : string=blahblah",

  1807.             "rational=0 : rational=1/2 : rational=1/-1",

  1808.             "rational=-1/0",

  1809.             "size=1024x768",

  1810.             "size=pal",

  1811.             "size=bogus",

  1812.             "pix_fmt=yuv420p",

  1813.             "pix_fmt=2",

  1814.             "pix_fmt=bogus",

  1815.             "sample_fmt=s16",

  1816.             "sample_fmt=2",

  1817.             "sample_fmt=bogus",

  1818.             "video_rate=pal",

  1819.             "video_rate=25",

  1820.             "video_rate=30000/1001",

  1821.             "video_rate=30/1.001",

  1822.             "video_rate=bogus",

  1823.             "duration=bogus",

  1824.             "duration=123.45",

  1825.             "duration=1\\:23\\:45.67",

  1826.             "color=blue",

  1827.             "color=0x223300",

  1828.             "color=0x42FF07AA",

  1829.             "cl=stereo+downmix",

  1830.             "cl=foo",

  1831.         };

  1832. 

  1833.         test_ctx.class = &test_class;

  1834.         av_opt_set_defaults(&test_ctx);

  1835. 

  1836.         av_log_set_level(AV_LOG_DEBUG);

  1837. 

  1838.         for (i=0; i < FF_ARRAY_ELEMS(options); i++) {

  1839.             av_log(&test_ctx, AV_LOG_DEBUG, "Setting options string '%s'\n", options[i]);

  1840.             if (av_set_options_string(&test_ctx, options[i], "=", ":") < 0)

  1841.                 av_log(&test_ctx, AV_LOG_ERROR, "Error setting options string: '%s'\n", options[i]);

  1842.             printf("\n");

  1843.         }

  1844.         av_opt_free(&test_ctx);

  1845.     }

  1846. 

  1847.     printf("\nTesting av_opt_set_from_string()\n");

  1848.     {

  1849.         TestContext test_ctx = { 0 };

  1850.         static const char * const options[] = {

  1851.             "",

  1852.             "5",

  1853.             "5:hello",

  1854.             "5:hello:size=pal",

  1855.             "5:size=pal:hello",

  1856.             ":",

  1857.             "=",

  1858.             " 5 : hello : size = pal ",

  1859.             "a_very_long_option_name_that_will_need_to_be_ellipsized_around_here=42"

  1860.         };

  1861.         static const char * const shorthand[] = { "num", "string", NULL };

  1862. 

  1863.         test_ctx.class = &test_class;

  1864.         av_opt_set_defaults(&test_ctx);

  1865. 

  1866.         av_log_set_level(AV_LOG_DEBUG);

  1867. 

  1868.         for (i=0; i < FF_ARRAY_ELEMS(options); i++) {

  1869.             av_log(&test_ctx, AV_LOG_DEBUG, "Setting options string '%s'\n", options[i]);

  1870.             if (av_opt_set_from_string(&test_ctx, options[i], shorthand, "=", ":") < 0)

  1871.                 av_log(&test_ctx, AV_LOG_ERROR, "Error setting options string: '%s'\n", options[i]);

  1872.             printf("\n");

  1873.         }

  1874.         av_opt_free(&test_ctx);

  1875.     }

  1876. 

  1877.     return 0;

  1878. }

  1879. 

  1880. #endif