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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, den = 1;

  195.         char buf[256];

  196.         int cmd = 0;

  197.         double d, num = 1;

  198.         int64_t intnum = 1;

  199. 

  200.         i = 0;

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

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

  203.                 cmd = *(val++);

  204.         }

  205. 

  206.         for (; i < sizeof(buf) - 1 && val[i] && (o->type != AV_OPT_TYPE_FLAGS || val[i] != '+' && val[i] != '-'); i++)

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

  208.         buf[i] = 0;

  209. 

  210.         {

  211.             const AVOption *o_named;

  212.             int res;

  213.             int ci = 0;

  214.             double const_values[64];

  215.             const char * const_names[64];

  216. 

  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, buf, const_names, const_values, NULL, NULL, NULL, NULL, NULL, 0, obj);

  245.             if (res < 0) {

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

  247.                 return res;

  248.             }

  249.         }

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

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

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

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

  254.         }

  255. 

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

  257.             return ret;

  258.         val += i;

  259.         if (!*val)

  260.             return 0;

  261.     }

  262. 

  263.     return 0;

  264. }

  265. 

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

  267. {

  268.     int ret;

  269. 

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

  271.         dst[0] =

  272.         dst[1] = 0;

  273.         return 0;

  274.     }

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

  276.     if (ret < 0)

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

  278.     return ret;

  279. }

  280. 

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

  282. {

  283.     int ret;

  284.     if (!val) {

  285.         ret = AVERROR(EINVAL);

  286.     } else {

  287.         ret = av_parse_video_rate(dst, val);

  288.     }

  289.     if (ret < 0)

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

  291.     return ret;

  292. }

  293. 

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

  295. {

  296.     int ret;

  297. 

  298.     if (!val) {

  299.         return 0;

  300.     } else {

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

  302.         if (ret < 0)

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

  304.         return ret;

  305.     }

  306.     return 0;

  307. }

  308. 

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

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

  311. {

  312.     int fmt, min, max;

  313. 

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

  315.         fmt = -1;

  316.     } else {

  317.         fmt = get_fmt(val);

  318.         if (fmt == -1) {

  319.             char *tail;

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

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

  322.                 av_log(obj, AV_LOG_ERROR,

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

  324.                 return AVERROR(EINVAL);

  325.             }

  326.         }

  327.     }

  328. 

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

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

  331. 

  332.     // hack for compatibility with old ffmpeg

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

  334.         min = -1;

  335.         max = fmt_nb-1;

  336.     }

  337. 

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

  339.         av_log(obj, AV_LOG_ERROR,

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

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

  342.         return AVERROR(ERANGE);

  343.     }

  344. 

  345.     *(int *)dst = fmt;

  346.     return 0;

  347. }

  348. 

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

  350. {

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

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

  353. }

  354. 

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

  356. {

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

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

  359. }

  360. 

  361. #if FF_API_OLD_AVOPTIONS

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

  363. {

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

  365.     if (o_out)

  366.         *o_out = o;

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

  368. }

  369. #endif

  370. 

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

  372. {

  373.     int ret = 0;

  374.     void *dst, *target_obj;

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

  376.     if (!o || !target_obj)

  377.         return AVERROR_OPTION_NOT_FOUND;

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

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

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

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

  382.                  o->type != AV_OPT_TYPE_CHANNEL_LAYOUT))

  383.         return AVERROR(EINVAL);

  384. 

  385.     if (o->flags & AV_OPT_FLAG_READONLY)

  386.         return AVERROR(EINVAL);

  387. 

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

  389.     switch (o->type) {

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

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

  392.     case AV_OPT_TYPE_FLAGS:

  393.     case AV_OPT_TYPE_INT:

  394.     case AV_OPT_TYPE_INT64:

  395.     case AV_OPT_TYPE_FLOAT:

  396.     case AV_OPT_TYPE_DOUBLE:

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

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

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

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

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

  402.     case AV_OPT_TYPE_DURATION:

  403.         if (!val) {

  404.             *(int64_t *)dst = 0;

  405.             return 0;

  406.         } else {

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

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

  409.             return ret;

  410.         }

  411.         break;

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

  413.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

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

  415.             *(int64_t *)dst = 0;

  416.         } else {

  417. #if FF_API_GET_CHANNEL_LAYOUT_COMPAT

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

  419. #else

  420.             int64_t cl = av_get_channel_layout(val);

  421. #endif

  422.             if (!cl) {

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

  424.                 ret = AVERROR(EINVAL);

  425.             }

  426.             *(int64_t *)dst = cl;

  427.             return ret;

  428.         }

  429.         break;

  430.     }

  431. 

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

  433.     return AVERROR(EINVAL);

  434. }

  435. 

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

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

  438.     {\

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

  440.             return AVERROR(EINVAL);\

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

  442.     }

  443. 

  444. OPT_EVAL_NUMBER(flags,  AV_OPT_TYPE_FLAGS,    int)

  445. OPT_EVAL_NUMBER(int,    AV_OPT_TYPE_INT,      int)

  446. OPT_EVAL_NUMBER(int64,  AV_OPT_TYPE_INT64,    int64_t)

  447. OPT_EVAL_NUMBER(float,  AV_OPT_TYPE_FLOAT,    float)

  448. OPT_EVAL_NUMBER(double, AV_OPT_TYPE_DOUBLE,   double)

  449. OPT_EVAL_NUMBER(q,      AV_OPT_TYPE_RATIONAL, AVRational)

  450. 

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

  452.                                   int search_flags)

  453. {

  454.     void *dst, *target_obj;

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

  456. 

  457.     if (!o || !target_obj)

  458.         return AVERROR_OPTION_NOT_FOUND;

  459. 

  460.     if (o->flags & AV_OPT_FLAG_READONLY)

  461.         return AVERROR(EINVAL);

  462. 

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

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

  465. }

  466. 

  467. #if FF_API_OLD_AVOPTIONS

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

  469. {

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

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

  472.         return NULL;

  473.     return o;

  474. }

  475. 

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

  477. {

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

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

  480.         return NULL;

  481.     return o;

  482. }

  483. 

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

  485. {

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

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

  488.         return NULL;

  489.     return o;

  490. }

  491. #endif

  492. 

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

  494. {

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

  496. }

  497. 

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

  499. {

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

  501. }

  502. 

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

  504. {

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

  506. }

  507. 

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

  509. {

  510.     void *target_obj;

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

  512.     uint8_t *ptr;

  513.     uint8_t **dst;

  514.     int *lendst;

  515. 

  516.     if (!o || !target_obj)

  517.         return AVERROR_OPTION_NOT_FOUND;

  518. 

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

  520.         return AVERROR(EINVAL);

  521. 

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

  523.     if (len && !ptr)

  524.         return AVERROR(ENOMEM);

  525. 

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

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

  528. 

  529.     av_free(*dst);

  530.     *dst = ptr;

  531.     *lendst = len;

  532.     if (len)

  533.         memcpy(ptr, val, len);

  534. 

  535.     return 0;

  536. }

  537. 

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

  539. {

  540.     void *target_obj;

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

  542. 

  543.     if (!o || !target_obj)

  544.         return AVERROR_OPTION_NOT_FOUND;

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

  546.         av_log(obj, AV_LOG_ERROR,

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

  548.         return AVERROR(EINVAL);

  549.     }

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

  551.         av_log(obj, AV_LOG_ERROR,

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

  553.         return AVERROR(EINVAL);

  554.     }

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

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

  557.     return 0;

  558. }

  559. 

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

  561. {

  562.     void *target_obj;

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

  564. 

  565.     if (!o || !target_obj)

  566.         return AVERROR_OPTION_NOT_FOUND;

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

  568.         av_log(obj, AV_LOG_ERROR,

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

  570.         return AVERROR(EINVAL);

  571.     }

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

  573.         return AVERROR(EINVAL);

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

  575. }

  576. 

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

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

  579. {

  580.     void *target_obj;

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

  582.                                      search_flags, &target_obj);

  583.     int min, max;

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

  585. 

  586.     if (!o || !target_obj)

  587.         return AVERROR_OPTION_NOT_FOUND;

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

  589.         av_log(obj, AV_LOG_ERROR,

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

  591.         return AVERROR(EINVAL);

  592.     }

  593. 

  594. #if LIBAVUTIL_VERSION_MAJOR < 54

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

  596.         min = -1;

  597.         max = nb_fmts-1;

  598.     } else

  599. #endif

  600.     {

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

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

  603.     }

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

  605.         av_log(obj, AV_LOG_ERROR,

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

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

  608.         return AVERROR(ERANGE);

  609.     }

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

  611.     return 0;

  612. }

  613. 

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

  615. {

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

  617. }

  618. 

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

  620. {

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

  622. }

  623. 

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

  625. {

  626.     void *target_obj;

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

  628. 

  629.     if (!o || !target_obj)

  630.         return AVERROR_OPTION_NOT_FOUND;

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

  632.         av_log(obj, AV_LOG_ERROR,

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

  634.         return AVERROR(EINVAL);

  635.     }

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

  637.     return 0;

  638. }

  639. 

  640. #if FF_API_OLD_AVOPTIONS

  641. /**

  642.  *

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

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

  645.  */

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

  647. {

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

  649.     void *dst;

  650.     uint8_t *bin;

  651.     int len, i;

  652.     if (!o)

  653.         return NULL;

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

  655.         return NULL;

  656. 

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

  658.     if (o_out) *o_out= o;

  659. 

  660.     switch (o->type) {

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

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

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

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

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

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

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

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

  669.     case AV_OPT_TYPE_BINARY:

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

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

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

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

  674.         break;

  675.     default: return NULL;

  676.     }

  677.     return buf;

  678. }

  679. #endif

  680. 

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

  682. {

  683.     void *dst, *target_obj;

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

  685.     uint8_t *bin, buf[128];

  686.     int len, i, ret;

  687.     int64_t i64;

  688. 

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

  690.         return AVERROR_OPTION_NOT_FOUND;

  691. 

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

  693. 

  694.     buf[0] = 0;

  695.     switch (o->type) {

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

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

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

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

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

  701.     case AV_OPT_TYPE_VIDEO_RATE:

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

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

  704.     case AV_OPT_TYPE_STRING:

  705.         if (*(uint8_t**)dst)

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

  707.         else

  708.             *out_val = av_strdup("");

  709.         return 0;

  710.     case AV_OPT_TYPE_BINARY:

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

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

  713.             return AVERROR(EINVAL);

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

  715.             return AVERROR(ENOMEM);

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

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

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

  719.         return 0;

  720.     case AV_OPT_TYPE_IMAGE_SIZE:

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

  722.         break;

  723.     case AV_OPT_TYPE_PIXEL_FMT:

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

  725.         break;

  726.     case AV_OPT_TYPE_SAMPLE_FMT:

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

  728.         break;

  729.     case AV_OPT_TYPE_DURATION:

  730.         i64 = *(int64_t *)dst;

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

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

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

  734.         break;

  735.     case AV_OPT_TYPE_COLOR:

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

  737.         break;

  738.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  739.         i64 = *(int64_t *)dst;

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

  741.         break;

  742.     default:

  743.         return AVERROR(EINVAL);

  744.     }

  745. 

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

  747.         return AVERROR(EINVAL);

  748.     *out_val = av_strdup(buf);

  749.     return 0;

  750. }

  751. 

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

  753.                       int search_flags)

  754. {

  755.     void *dst, *target_obj;

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

  757.     if (!o || !target_obj)

  758.         goto error;

  759. 

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

  761. 

  762.     if (o_out) *o_out= o;

  763. 

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

  765. 

  766. error:

  767.     *den=*intnum=0;

  768.     return -1;

  769. }

  770. 

  771. #if FF_API_OLD_AVOPTIONS

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

  773. {

  774.     int64_t intnum=1;

  775.     double num=1;

  776.     int den=1;

  777. 

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

  779.         return NAN;

  780.     return num*intnum/den;

  781. }

  782. 

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

  784. {

  785.     int64_t intnum=1;

  786.     double num=1;

  787.     int den=1;

  788. 

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

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

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

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

  793.     else

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

  795. }

  796. 

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

  798. {

  799.     int64_t intnum=1;

  800.     double num=1;

  801.     int den=1;

  802. 

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

  804.         return -1;

  805.     return num*intnum/den;

  806. }

  807. #endif

  808. 

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

  810. {

  811.     int64_t intnum = 1;

  812.     double     num = 1;

  813.     int   ret, den = 1;

  814. 

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

  816.         return ret;

  817.     *out_val = num*intnum/den;

  818.     return 0;

  819. }

  820. 

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

  822. {

  823.     int64_t intnum = 1;

  824.     double     num = 1;

  825.     int   ret, den = 1;

  826. 

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

  828.         return ret;

  829.     *out_val = num*intnum/den;

  830.     return 0;

  831. }

  832. 

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

  834. {

  835.     int64_t intnum = 1;

  836.     double     num = 1;

  837.     int   ret, den = 1;

  838. 

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

  840.         return ret;

  841. 

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

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

  844.     else

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

  846.     return 0;

  847. }

  848. 

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

  850. {

  851.     void *dst, *target_obj;

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

  853.     if (!o || !target_obj)

  854.         return AVERROR_OPTION_NOT_FOUND;

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

  856.         av_log(obj, AV_LOG_ERROR,

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

  858.         return AVERROR(EINVAL);

  859.     }

  860. 

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

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

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

  864.     return 0;

  865. }

  866. 

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

  868. {

  869.     int64_t intnum = 1;

  870.     double     num = 1;

  871.     int   ret, den = 1;

  872. 

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

  874.         return ret;

  875. 

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

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

  878.     else

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

  880.     return 0;

  881. }

  882. 

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

  884.                       enum AVOptionType type, const char *desc)

  885. {

  886.     void *dst, *target_obj;

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

  888.     if (!o || !target_obj)

  889.         return AVERROR_OPTION_NOT_FOUND;

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

  891.         av_log(obj, AV_LOG_ERROR,

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

  893.         return AVERROR(EINVAL);

  894.     }

  895. 

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

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

  898.     return 0;

  899. }

  900. 

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

  902. {

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

  904. }

  905. 

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

  907. {

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

  909. }

  910. 

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

  912. {

  913.     void *dst, *target_obj;

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

  915.     if (!o || !target_obj)

  916.         return AVERROR_OPTION_NOT_FOUND;

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

  918.         av_log(obj, AV_LOG_ERROR,

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

  920.         return AVERROR(EINVAL);

  921.     }

  922. 

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

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

  925.     return 0;

  926. }

  927. 

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

  929. {

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

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

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

  933.     int64_t res;

  934. 

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

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

  937.         return 0;

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

  939. }

  940. 

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

  942. {

  943.     if      (d == INT_MAX) {

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  969.     } else {

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

  971.     }

  972. }

  973. 

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

  975.                      int req_flags, int rej_flags)

  976. {

  977.     const AVOption *opt=NULL;

  978.     AVOptionRanges *r;

  979.     int i;

  980. 

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

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

  983.             continue;

  984. 

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

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

  987.          * Only print items from the requested unit.

  988.          */

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

  990.             continue;

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

  992.             continue;

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

  994.             continue;

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

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

  997.         else

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

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

  1000.                    opt->name);

  1001. 

  1002.         switch (opt->type) {

  1003.             case AV_OPT_TYPE_FLAGS:

  1004.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<flags>");

  1005.                 break;

  1006.             case AV_OPT_TYPE_INT:

  1007.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<int>");

  1008.                 break;

  1009.             case AV_OPT_TYPE_INT64:

  1010.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<int64>");

  1011.                 break;

  1012.             case AV_OPT_TYPE_DOUBLE:

  1013.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<double>");

  1014.                 break;

  1015.             case AV_OPT_TYPE_FLOAT:

  1016.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<float>");

  1017.                 break;

  1018.             case AV_OPT_TYPE_STRING:

  1019.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<string>");

  1020.                 break;

  1021.             case AV_OPT_TYPE_RATIONAL:

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

  1023.                 break;

  1024.             case AV_OPT_TYPE_BINARY:

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

  1026.                 break;

  1027.             case AV_OPT_TYPE_IMAGE_SIZE:

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

  1029.                 break;

  1030.             case AV_OPT_TYPE_VIDEO_RATE:

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

  1032.                 break;

  1033.             case AV_OPT_TYPE_PIXEL_FMT:

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

  1035.                 break;

  1036.             case AV_OPT_TYPE_SAMPLE_FMT:

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

  1038.                 break;

  1039.             case AV_OPT_TYPE_DURATION:

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

  1041.                 break;

  1042.             case AV_OPT_TYPE_COLOR:

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

  1044.                 break;

  1045.             case AV_OPT_TYPE_CHANNEL_LAYOUT:

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

  1047.                 break;

  1048.             case AV_OPT_TYPE_CONST:

  1049.             default:

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

  1051.                 break;

  1052.         }

  1053.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_ENCODING_PARAM) ? 'E' : '.');

  1054.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_DECODING_PARAM) ? 'D' : '.');

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

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

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

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

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

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

  1061. 

  1062.         if (opt->help)

  1063.             av_log(av_log_obj, AV_LOG_INFO, " %s", opt->help);

  1064. 

  1065.         if (av_opt_query_ranges(&r, obj, opt->name, AV_OPT_SEARCH_FAKE_OBJ) >= 0) {

  1066.             switch (opt->type) {

  1067.             case AV_OPT_TYPE_INT:

  1068.             case AV_OPT_TYPE_INT64:

  1069.             case AV_OPT_TYPE_DOUBLE:

  1070.             case AV_OPT_TYPE_FLOAT:

  1071.             case AV_OPT_TYPE_RATIONAL:

  1072.                 for (i = 0; i < r->nb_ranges; i++) {

  1073.                     av_log(av_log_obj, AV_LOG_INFO, " (from ");

  1074.                     log_value(av_log_obj, AV_LOG_INFO, r->range[i]->value_min);

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

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

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

  1078.                 }

  1079.                 break;

  1080.             }

  1081.             av_opt_freep_ranges(&r);

  1082.         }

  1083. 

  1084.         if (opt->type != AV_OPT_TYPE_CONST  &&

  1085.             opt->type != AV_OPT_TYPE_BINARY &&

  1086.                 !((opt->type == AV_OPT_TYPE_COLOR      ||

  1087.                    opt->type == AV_OPT_TYPE_IMAGE_SIZE ||

  1088.                    opt->type == AV_OPT_TYPE_STRING     ||

  1089.                    opt->type == AV_OPT_TYPE_VIDEO_RATE) &&

  1090.                   !opt->default_val.str)) {

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

  1092.             switch (opt->type) {

  1093.             case AV_OPT_TYPE_FLAGS:

  1094.                 av_log(av_log_obj, AV_LOG_INFO, "%"PRIX64, opt->default_val.i64);

  1095.                 break;

  1096.             case AV_OPT_TYPE_DURATION:

  1097.             case AV_OPT_TYPE_INT:

  1098.             case AV_OPT_TYPE_INT64:

  1099.                 log_value(av_log_obj, AV_LOG_INFO, opt->default_val.i64);

  1100.                 break;

  1101.             case AV_OPT_TYPE_DOUBLE:

  1102.             case AV_OPT_TYPE_FLOAT:

  1103.                 log_value(av_log_obj, AV_LOG_INFO, opt->default_val.dbl);

  1104.                 break;

  1105.             case AV_OPT_TYPE_RATIONAL: {

  1106.                 AVRational q = av_d2q(opt->default_val.dbl, INT_MAX);

  1107.                 av_log(av_log_obj, AV_LOG_INFO, "%d/%d", q.num, q.den); }

  1108.                 break;

  1109.             case AV_OPT_TYPE_PIXEL_FMT:

  1110.                 av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(av_get_pix_fmt_name(opt->default_val.i64), "none"));

  1111.                 break;

  1112.             case AV_OPT_TYPE_SAMPLE_FMT:

  1113.                 av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(av_get_sample_fmt_name(opt->default_val.i64), "none"));

  1114.                 break;

  1115.             case AV_OPT_TYPE_COLOR:

  1116.             case AV_OPT_TYPE_IMAGE_SIZE:

  1117.             case AV_OPT_TYPE_STRING:

  1118.             case AV_OPT_TYPE_VIDEO_RATE:

  1119.                 av_log(av_log_obj, AV_LOG_INFO, "\"%s\"", opt->default_val.str);

  1120.                 break;

  1121.             case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1122.                 av_log(av_log_obj, AV_LOG_INFO, "0x%"PRIx64, opt->default_val.i64);

  1123.                 break;

  1124.             }

  1125.             av_log(av_log_obj, AV_LOG_INFO, ")");

  1126.         }

  1127. 

  1128.         av_log(av_log_obj, AV_LOG_INFO, "\n");

  1129.         if (opt->unit && opt->type != AV_OPT_TYPE_CONST) {

  1130.             opt_list(obj, av_log_obj, opt->unit, req_flags, rej_flags);

  1131.         }

  1132.     }

  1133. }

  1134. 

  1135. int av_opt_show2(void *obj, void *av_log_obj, int req_flags, int rej_flags)

  1136. {

  1137.     if (!obj)

  1138.         return -1;

  1139. 

  1140.     av_log(av_log_obj, AV_LOG_INFO, "%s AVOptions:\n", (*(AVClass**)obj)->class_name);

  1141. 

  1142.     opt_list(obj, av_log_obj, NULL, req_flags, rej_flags);

  1143. 

  1144.     return 0;

  1145. }

  1146. 

  1147. void av_opt_set_defaults(void *s)

  1148. {

  1149. #if FF_API_OLD_AVOPTIONS

  1150.     av_opt_set_defaults2(s, 0, 0);

  1151. }

  1152. 

  1153. void av_opt_set_defaults2(void *s, int mask, int flags)

  1154. {

  1155. #endif

  1156.     const AVClass *class = *(AVClass **)s;

  1157.     const AVOption *opt = NULL;

  1158.     while ((opt = av_opt_next(s, opt)) != NULL) {

  1159.         void *dst = ((uint8_t*)s) + opt->offset;

  1160. #if FF_API_OLD_AVOPTIONS

  1161.         if ((opt->flags & mask) != flags)

  1162.             continue;

  1163. #endif

  1164. 

  1165.         if (opt->flags & AV_OPT_FLAG_READONLY)

  1166.             continue;

  1167. 

  1168.         switch (opt->type) {

  1169.             case AV_OPT_TYPE_CONST:

  1170.                 /* Nothing to be done here */

  1171.             break;

  1172.             case AV_OPT_TYPE_FLAGS:

  1173.             case AV_OPT_TYPE_INT:

  1174.             case AV_OPT_TYPE_INT64:

  1175.             case AV_OPT_TYPE_DURATION:

  1176.             case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1177.                 write_number(s, opt, dst, 1, 1, opt->default_val.i64);

  1178.             break;

  1179.             case AV_OPT_TYPE_DOUBLE:

  1180.             case AV_OPT_TYPE_FLOAT: {

  1181.                 double val;

  1182.                 val = opt->default_val.dbl;

  1183.                 write_number(s, opt, dst, val, 1, 1);

  1184.             }

  1185.             break;

  1186.             case AV_OPT_TYPE_RATIONAL: {

  1187.                 AVRational val;

  1188.                 val = av_d2q(opt->default_val.dbl, INT_MAX);

  1189.                 write_number(s, opt, dst, 1, val.den, val.num);

  1190.             }

  1191.             break;

  1192.             case AV_OPT_TYPE_COLOR:

  1193.                 set_string_color(s, opt, opt->default_val.str, dst);

  1194.                 break;

  1195.             case AV_OPT_TYPE_STRING:

  1196.                 set_string(s, opt, opt->default_val.str, dst);

  1197.                 break;

  1198.             case AV_OPT_TYPE_IMAGE_SIZE:

  1199.                 set_string_image_size(s, opt, opt->default_val.str, dst);

  1200.                 break;

  1201.             case AV_OPT_TYPE_VIDEO_RATE:

  1202.                 set_string_video_rate(s, opt, opt->default_val.str, dst);

  1203.                 break;

  1204.             case AV_OPT_TYPE_PIXEL_FMT:

  1205. #if LIBAVUTIL_VERSION_MAJOR < 54

  1206.                 if (class->version && class->version < AV_VERSION_INT(52, 10, 100))

  1207.                     av_opt_set(s, opt->name, opt->default_val.str, 0);

  1208.                 else

  1209. #endif

  1210.                     write_number(s, opt, dst, 1, 1, opt->default_val.i64);

  1211.                 break;

  1212.             case AV_OPT_TYPE_SAMPLE_FMT:

  1213. #if LIBAVUTIL_VERSION_MAJOR < 54

  1214.                 if (class->version && class->version < AV_VERSION_INT(52, 10, 100))

  1215.                     av_opt_set(s, opt->name, opt->default_val.str, 0);

  1216.                 else

  1217. #endif

  1218.                     write_number(s, opt, dst, 1, 1, opt->default_val.i64);

  1219.                 break;

  1220.             case AV_OPT_TYPE_BINARY:

  1221.                 /* Cannot set default for binary */

  1222.             break;

  1223.             default:

  1224.                 av_log(s, AV_LOG_DEBUG, "AVOption type %d of option %s not implemented yet\n", opt->type, opt->name);

  1225.         }

  1226.     }

  1227. }

  1228. 

  1229. /**

  1230.  * Store the value in the field in ctx that is named like key.

  1231.  * ctx must be an AVClass context, storing is done using AVOptions.

  1232.  *

  1233.  * @param buf the string to parse, buf will be updated to point at the

  1234.  * separator just after the parsed key/value pair

  1235.  * @param key_val_sep a 0-terminated list of characters used to

  1236.  * separate key from value

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

  1238.  * two pairs from each other

  1239.  * @return 0 if the key/value pair has been successfully parsed and

  1240.  * set, or a negative value corresponding to an AVERROR code in case

  1241.  * of error:

  1242.  * AVERROR(EINVAL) if the key/value pair cannot be parsed,

  1243.  * the error code issued by av_opt_set() if the key/value pair

  1244.  * cannot be set

  1245.  */

  1246. static int parse_key_value_pair(void *ctx, const char **buf,

  1247.                                 const char *key_val_sep, const char *pairs_sep)

  1248. {

  1249.     char *key = av_get_token(buf, key_val_sep);

  1250.     char *val;

  1251.     int ret;

  1252. 

  1253.     if (!key)

  1254.         return AVERROR(ENOMEM);

  1255. 

  1256.     if (*key && strspn(*buf, key_val_sep)) {

  1257.         (*buf)++;

  1258.         val = av_get_token(buf, pairs_sep);

  1259.         if (!val) {

  1260.             av_freep(&key);

  1261.             return AVERROR(ENOMEM);

  1262.         }

  1263.     } else {

  1264.         av_log(ctx, AV_LOG_ERROR, "Missing key or no key/value separator found after key '%s'\n", key);

  1265.         av_free(key);

  1266.         return AVERROR(EINVAL);

  1267.     }

  1268. 

  1269.     av_log(ctx, AV_LOG_DEBUG, "Setting entry with key '%s' to value '%s'\n", key, val);

  1270. 

  1271.     ret = av_opt_set(ctx, key, val, AV_OPT_SEARCH_CHILDREN);

  1272.     if (ret == AVERROR_OPTION_NOT_FOUND)

  1273.         av_log(ctx, AV_LOG_ERROR, "Key '%s' not found.\n", key);

  1274. 

  1275.     av_free(key);

  1276.     av_free(val);

  1277.     return ret;

  1278. }

  1279. 

  1280. int av_set_options_string(void *ctx, const char *opts,

  1281.                           const char *key_val_sep, const char *pairs_sep)

  1282. {

  1283.     int ret, count = 0;

  1284. 

  1285.     if (!opts)

  1286.         return 0;

  1287. 

  1288.     while (*opts) {

  1289.         if ((ret = parse_key_value_pair(ctx, &opts, key_val_sep, pairs_sep)) < 0)

  1290.             return ret;

  1291.         count++;

  1292. 

  1293.         if (*opts)

  1294.             opts++;

  1295.     }

  1296. 

  1297.     return count;

  1298. }

  1299. 

  1300. #define WHITESPACES " \n\t"

  1301. 

  1302. static int is_key_char(char c)

  1303. {

  1304.     return (unsigned)((c | 32) - 'a') < 26 ||

  1305.            (unsigned)(c - '0') < 10 ||

  1306.            c == '-' || c == '_' || c == '/' || c == '.';

  1307. }

  1308. 

  1309. /**

  1310.  * Read a key from a string.

  1311.  *

  1312.  * The key consists of is_key_char characters and must be terminated by a

  1313.  * character from the delim string; spaces are ignored.

  1314.  *

  1315.  * @return  0 for success (even with ellipsis), <0 for failure

  1316.  */

  1317. static int get_key(const char **ropts, const char *delim, char **rkey)

  1318. {

  1319.     const char *opts = *ropts;

  1320.     const char *key_start, *key_end;

  1321. 

  1322.     key_start = opts += strspn(opts, WHITESPACES);

  1323.     while (is_key_char(*opts))

  1324.         opts++;

  1325.     key_end = opts;

  1326.     opts += strspn(opts, WHITESPACES);

  1327.     if (!*opts || !strchr(delim, *opts))

  1328.         return AVERROR(EINVAL);

  1329.     opts++;

  1330.     if (!(*rkey = av_malloc(key_end - key_start + 1)))

  1331.         return AVERROR(ENOMEM);

  1332.     memcpy(*rkey, key_start, key_end - key_start);

  1333.     (*rkey)[key_end - key_start] = 0;

  1334.     *ropts = opts;

  1335.     return 0;

  1336. }

  1337. 

  1338. int av_opt_get_key_value(const char **ropts,

  1339.                          const char *key_val_sep, const char *pairs_sep,

  1340.                          unsigned flags,

  1341.                          char **rkey, char **rval)

  1342. {

  1343.     int ret;

  1344.     char *key = NULL, *val;

  1345.     const char *opts = *ropts;

  1346. 

  1347.     if ((ret = get_key(&opts, key_val_sep, &key)) < 0 &&

  1348.         !(flags & AV_OPT_FLAG_IMPLICIT_KEY))

  1349.         return AVERROR(EINVAL);

  1350.     if (!(val = av_get_token(&opts, pairs_sep))) {

  1351.         av_free(key);

  1352.         return AVERROR(ENOMEM);

  1353.     }

  1354.     *ropts = opts;

  1355.     *rkey  = key;

  1356.     *rval  = val;

  1357.     return 0;

  1358. }

  1359. 

  1360. int av_opt_set_from_string(void *ctx, const char *opts,

  1361.                            const char *const *shorthand,

  1362.                            const char *key_val_sep, const char *pairs_sep)

  1363. {

  1364.     int ret, count = 0;

  1365.     const char *dummy_shorthand = NULL;

  1366.     char *av_uninit(parsed_key), *av_uninit(value);

  1367.     const char *key;

  1368. 

  1369.     if (!opts)

  1370.         return 0;

  1371.     if (!shorthand)

  1372.         shorthand = &dummy_shorthand;

  1373. 

  1374.     while (*opts) {

  1375.         ret = av_opt_get_key_value(&opts, key_val_sep, pairs_sep,

  1376.                                    *shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,

  1377.                                    &parsed_key, &value);

  1378.         if (ret < 0) {

  1379.             if (ret == AVERROR(EINVAL))

  1380.                 av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", opts);

  1381.             else

  1382.                 av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", opts,

  1383.                        av_err2str(ret));

  1384.             return ret;

  1385.         }

  1386.         if (*opts)

  1387.             opts++;

  1388.         if (parsed_key) {

  1389.             key = parsed_key;

  1390.             while (*shorthand) /* discard all remaining shorthand */

  1391.                 shorthand++;

  1392.         } else {

  1393.             key = *(shorthand++);

  1394.         }

  1395. 

  1396.         av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);

  1397.         if ((ret = av_opt_set(ctx, key, value, 0)) < 0) {

  1398.             if (ret == AVERROR_OPTION_NOT_FOUND)

  1399.                 av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);

  1400.             av_free(value);

  1401.             av_free(parsed_key);

  1402.             return ret;

  1403.         }

  1404. 

  1405.         av_free(value);

  1406.         av_free(parsed_key);

  1407.         count++;

  1408.     }

  1409.     return count;

  1410. }

  1411. 

  1412. void av_opt_free(void *obj)

  1413. {

  1414.     const AVOption *o = NULL;

  1415.     while ((o = av_opt_next(obj, o)))

  1416.         if (o->type == AV_OPT_TYPE_STRING || o->type == AV_OPT_TYPE_BINARY)

  1417.             av_freep((uint8_t *)obj + o->offset);

  1418. }

  1419. 

  1420. int av_opt_set_dict2(void *obj, AVDictionary **options, int search_flags)

  1421. {

  1422.     AVDictionaryEntry *t = NULL;

  1423.     AVDictionary    *tmp = NULL;

  1424.     int ret = 0;

  1425. 

  1426.     if (!options)

  1427.         return 0;

  1428. 

  1429.     while ((t = av_dict_get(*options, "", t, AV_DICT_IGNORE_SUFFIX))) {

  1430.         ret = av_opt_set(obj, t->key, t->value, search_flags);

  1431.         if (ret == AVERROR_OPTION_NOT_FOUND)

  1432.             av_dict_set(&tmp, t->key, t->value, 0);

  1433.         else if (ret < 0) {

  1434.             av_log(obj, AV_LOG_ERROR, "Error setting option %s to value %s.\n", t->key, t->value);

  1435.             break;

  1436.         }

  1437.         ret = 0;

  1438.     }

  1439.     av_dict_free(options);

  1440.     *options = tmp;

  1441.     return ret;

  1442. }

  1443. 

  1444. int av_opt_set_dict(void *obj, AVDictionary **options)

  1445. {

  1446.     return av_opt_set_dict2(obj, options, 0);

  1447. }

  1448. 

  1449. const AVOption *av_opt_find(void *obj, const char *name, const char *unit,

  1450.                             int opt_flags, int search_flags)

  1451. {

  1452.     return av_opt_find2(obj, name, unit, opt_flags, search_flags, NULL);

  1453. }

  1454. 

  1455. const AVOption *av_opt_find2(void *obj, const char *name, const char *unit,

  1456.                              int opt_flags, int search_flags, void **target_obj)

  1457. {

  1458.     const AVClass  *c;

  1459.     const AVOption *o = NULL;

  1460. 

  1461.     if(!obj)

  1462.         return NULL;

  1463. 

  1464.     c= *(AVClass**)obj;

  1465. 

  1466.     if (!c)

  1467.         return NULL;

  1468. 

  1469.     if (search_flags & AV_OPT_SEARCH_CHILDREN) {

  1470.         if (search_flags & AV_OPT_SEARCH_FAKE_OBJ) {

  1471.             const AVClass *child = NULL;

  1472.             while (child = av_opt_child_class_next(c, child))

  1473.                 if (o = av_opt_find2(&child, name, unit, opt_flags, search_flags, NULL))

  1474.                     return o;

  1475.         } else {

  1476.             void *child = NULL;

  1477.             while (child = av_opt_child_next(obj, child))

  1478.                 if (o = av_opt_find2(child, name, unit, opt_flags, search_flags, target_obj))

  1479.                     return o;

  1480.         }

  1481.     }

  1482. 

  1483.     while (o = av_opt_next(obj, o)) {

  1484.         if (!strcmp(o->name, name) && (o->flags & opt_flags) == opt_flags &&

  1485.             ((!unit && o->type != AV_OPT_TYPE_CONST) ||

  1486.              (unit  && o->type == AV_OPT_TYPE_CONST && o->unit && !strcmp(o->unit, unit)))) {

  1487.             if (target_obj) {

  1488.                 if (!(search_flags & AV_OPT_SEARCH_FAKE_OBJ))

  1489.                     *target_obj = obj;

  1490.                 else

  1491.                     *target_obj = NULL;

  1492.             }

  1493.             return o;

  1494.         }

  1495.     }

  1496.     return NULL;

  1497. }

  1498. 

  1499. void *av_opt_child_next(void *obj, void *prev)

  1500. {

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

  1502.     if (c->child_next)

  1503.         return c->child_next(obj, prev);

  1504.     return NULL;

  1505. }

  1506. 

  1507. const AVClass *av_opt_child_class_next(const AVClass *parent, const AVClass *prev)

  1508. {

  1509.     if (parent->child_class_next)

  1510.         return parent->child_class_next(prev);

  1511.     return NULL;

  1512. }

  1513. 

  1514. void *av_opt_ptr(const AVClass *class, void *obj, const char *name)

  1515. {

  1516.     const AVOption *opt= av_opt_find2(&class, name, NULL, 0, AV_OPT_SEARCH_FAKE_OBJ, NULL);

  1517.     if(!opt)

  1518.         return NULL;

  1519.     return (uint8_t*)obj + opt->offset;

  1520. }

  1521. 

  1522. static int opt_size(enum AVOptionType type)

  1523. {

  1524.     switch(type) {

  1525.     case AV_OPT_TYPE_INT:

  1526.     case AV_OPT_TYPE_FLAGS:     return sizeof(int);

  1527.     case AV_OPT_TYPE_DURATION:

  1528.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1529.     case AV_OPT_TYPE_INT64:     return sizeof(int64_t);

  1530.     case AV_OPT_TYPE_DOUBLE:    return sizeof(double);

  1531.     case AV_OPT_TYPE_FLOAT:     return sizeof(float);

  1532.     case AV_OPT_TYPE_STRING:    return sizeof(uint8_t*);

  1533.     case AV_OPT_TYPE_VIDEO_RATE:

  1534.     case AV_OPT_TYPE_RATIONAL:  return sizeof(AVRational);

  1535.     case AV_OPT_TYPE_BINARY:    return sizeof(uint8_t*) + sizeof(int);

  1536.     case AV_OPT_TYPE_IMAGE_SIZE:return sizeof(int[2]);

  1537.     case AV_OPT_TYPE_PIXEL_FMT: return sizeof(enum AVPixelFormat);

  1538.     case AV_OPT_TYPE_SAMPLE_FMT:return sizeof(enum AVSampleFormat);

  1539.     case AV_OPT_TYPE_COLOR:     return 4;

  1540.     }

  1541.     return 0;

  1542. }

  1543. 

  1544. int av_opt_copy(void *dst, void *src)

  1545. {

  1546.     const AVOption *o = NULL;

  1547.     const AVClass *c;

  1548.     int ret = 0;

  1549. 

  1550.     if (!src)

  1551.         return 0;

  1552. 

  1553.     c = *(AVClass**)src;

  1554.     if (*(AVClass**)dst && c != *(AVClass**)dst)

  1555.         return AVERROR(EINVAL);

  1556. 

  1557.     while ((o = av_opt_next(src, o))) {

  1558.         void *field_dst = ((uint8_t*)dst) + o->offset;

  1559.         void *field_src = ((uint8_t*)src) + o->offset;

  1560.         uint8_t **field_dst8 = (uint8_t**)field_dst;

  1561.         uint8_t **field_src8 = (uint8_t**)field_src;

  1562. 

  1563.         if (o->type == AV_OPT_TYPE_STRING) {

  1564.             if (*field_dst8 != *field_src8)

  1565.                 av_freep(field_dst8);

  1566.             *field_dst8 = av_strdup(*field_src8);

  1567.             if (*field_src8 && !*field_dst8)

  1568.                 ret = AVERROR(ENOMEM);

  1569.         } else if (o->type == AV_OPT_TYPE_BINARY) {

  1570.             int len = *(int*)(field_src8 + 1);

  1571.             if (*field_dst8 != *field_src8)

  1572.                 av_freep(field_dst8);

  1573.             *field_dst8 = av_memdup(*field_src8, len);

  1574.             if (len && !*field_dst8) {

  1575.                 ret = AVERROR(ENOMEM);

  1576.                 len = 0;

  1577.             }

  1578.             *(int*)(field_dst8 + 1) = len;

  1579.         } else if (o->type == AV_OPT_TYPE_CONST) {

  1580.             // do nothing

  1581.         } else {

  1582.             memcpy(field_dst, field_src, opt_size(o->type));

  1583.         }

  1584.     }

  1585.     return ret;

  1586. }

  1587. 

  1588. int av_opt_query_ranges(AVOptionRanges **ranges_arg, void *obj, const char *key, int flags)

  1589. {

  1590.     int ret;

  1591.     const AVClass *c = *(AVClass**)obj;

  1592.     int (*callback)(AVOptionRanges **, void *obj, const char *key, int flags) = NULL;

  1593. 

  1594.     if (c->version > (52 << 16 | 11 << 8))

  1595.         callback = c->query_ranges;

  1596. 

  1597.     if (!callback)

  1598.         callback = av_opt_query_ranges_default;

  1599. 

  1600.     ret = callback(ranges_arg, obj, key, flags);

  1601.     if (ret >= 0) {

  1602.         if (!(flags & AV_OPT_MULTI_COMPONENT_RANGE))

  1603.             ret = 1;

  1604.         (*ranges_arg)->nb_components = ret;

  1605.     }

  1606.     return ret;

  1607. }

  1608. 

  1609. int av_opt_query_ranges_default(AVOptionRanges **ranges_arg, void *obj, const char *key, int flags)

  1610. {

  1611.     AVOptionRanges *ranges = av_mallocz(sizeof(*ranges));

  1612.     AVOptionRange **range_array = av_mallocz(sizeof(void*));

  1613.     AVOptionRange *range = av_mallocz(sizeof(*range));

  1614.     const AVOption *field = av_opt_find(obj, key, NULL, 0, flags);

  1615.     int ret;

  1616. 

  1617.     *ranges_arg = NULL;

  1618. 

  1619.     if (!ranges || !range || !range_array || !field) {

  1620.         ret = AVERROR(ENOMEM);

  1621.         goto fail;

  1622.     }

  1623. 

  1624.     ranges->range = range_array;

  1625.     ranges->range[0] = range;

  1626.     ranges->nb_ranges = 1;

  1627.     ranges->nb_components = 1;

  1628.     range->is_range = 1;

  1629.     range->value_min = field->min;

  1630.     range->value_max = field->max;

  1631. 

  1632.     switch (field->type) {

  1633.     case AV_OPT_TYPE_INT:

  1634.     case AV_OPT_TYPE_INT64:

  1635.     case AV_OPT_TYPE_PIXEL_FMT:

  1636.     case AV_OPT_TYPE_SAMPLE_FMT:

  1637.     case AV_OPT_TYPE_FLOAT:

  1638.     case AV_OPT_TYPE_DOUBLE:

  1639.     case AV_OPT_TYPE_DURATION:

  1640.     case AV_OPT_TYPE_COLOR:

  1641.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1642.         break;

  1643.     case AV_OPT_TYPE_STRING:

  1644.         range->component_min = 0;

  1645.         range->component_max = 0x10FFFF; // max unicode value

  1646.         range->value_min = -1;

  1647.         range->value_max = INT_MAX;

  1648.         break;

  1649.     case AV_OPT_TYPE_RATIONAL:

  1650.         range->component_min = INT_MIN;

  1651.         range->component_max = INT_MAX;

  1652.         break;

  1653.     case AV_OPT_TYPE_IMAGE_SIZE:

  1654.         range->component_min = 0;

  1655.         range->component_max = INT_MAX/128/8;

  1656.         range->value_min = 0;

  1657.         range->value_max = INT_MAX/8;

  1658.         break;

  1659.     case AV_OPT_TYPE_VIDEO_RATE:

  1660.         range->component_min = 1;

  1661.         range->component_max = INT_MAX;

  1662.         range->value_min = 1;

  1663.         range->value_max = INT_MAX;

  1664.         break;

  1665.     default:

  1666.         ret = AVERROR(ENOSYS);

  1667.         goto fail;

  1668.     }

  1669. 

  1670.     *ranges_arg = ranges;

  1671.     return 1;

  1672. fail:

  1673.     av_free(ranges);

  1674.     av_free(range);

  1675.     av_free(range_array);

  1676.     return ret;

  1677. }

  1678. 

  1679. void av_opt_freep_ranges(AVOptionRanges **rangesp)

  1680. {

  1681.     int i;

  1682.     AVOptionRanges *ranges = *rangesp;

  1683. 

  1684.     if (!ranges)

  1685.         return;

  1686. 

  1687.     for (i = 0; i < ranges->nb_ranges * ranges->nb_components; i++) {

  1688.         AVOptionRange *range = ranges->range[i];

  1689.         if (range) {

  1690.             av_freep(&range->str);

  1691.             av_freep(&ranges->range[i]);

  1692.         }

  1693.     }

  1694.     av_freep(&ranges->range);

  1695.     av_freep(rangesp);

  1696. }

  1697. 

  1698. #ifdef TEST

  1699. 

  1700. typedef struct TestContext

  1701. {

  1702.     const AVClass *class;

  1703.     int num;

  1704.     int toggle;

  1705.     char *string;

  1706.     int flags;

  1707.     AVRational rational;

  1708.     AVRational video_rate;

  1709.     int w, h;

  1710.     enum AVPixelFormat pix_fmt;

  1711.     enum AVSampleFormat sample_fmt;

  1712.     int64_t duration;

  1713.     uint8_t color[4];

  1714.     int64_t channel_layout;

  1715. } TestContext;

  1716. 

  1717. #define OFFSET(x) offsetof(TestContext, x)

  1718. 

  1719. #define TEST_FLAG_COOL 01

  1720. #define TEST_FLAG_LAME 02

  1721. #define TEST_FLAG_MU   04

  1722. 

  1723. static const AVOption test_options[]= {

  1724. {"num",      "set num",        OFFSET(num),      AV_OPT_TYPE_INT,      {.i64 = 0},       0,        100                 },

  1725. {"toggle",   "set toggle",     OFFSET(toggle),   AV_OPT_TYPE_INT,      {.i64 = 0},       0,        1                   },

  1726. {"rational", "set rational",   OFFSET(rational), AV_OPT_TYPE_RATIONAL, {.dbl = 0},       0,        10                  },

  1727. {"string",   "set string",     OFFSET(string),   AV_OPT_TYPE_STRING,   {.str = "default"}, CHAR_MIN, CHAR_MAX          },

  1728. {"flags",    "set flags",      OFFSET(flags),    AV_OPT_TYPE_FLAGS,    {.i64 = 0},       0,        INT_MAX, 0, "flags" },

  1729. {"cool",     "set cool flag ", 0,                AV_OPT_TYPE_CONST,    {.i64 = TEST_FLAG_COOL}, INT_MIN,  INT_MAX, 0, "flags" },

  1730. {"lame",     "set lame flag ", 0,                AV_OPT_TYPE_CONST,    {.i64 = TEST_FLAG_LAME}, INT_MIN,  INT_MAX, 0, "flags" },

  1731. {"mu",       "set mu flag ",   0,                AV_OPT_TYPE_CONST,    {.i64 = TEST_FLAG_MU},   INT_MIN,  INT_MAX, 0, "flags" },

  1732. {"size",     "set size",       OFFSET(w),        AV_OPT_TYPE_IMAGE_SIZE,{0},             0,        0                   },

  1733. {"pix_fmt",  "set pixfmt",     OFFSET(pix_fmt),  AV_OPT_TYPE_PIXEL_FMT, {.i64 = AV_PIX_FMT_NONE}, -1, INT_MAX},

  1734. {"sample_fmt", "set samplefmt", OFFSET(sample_fmt), AV_OPT_TYPE_SAMPLE_FMT, {.i64 = AV_SAMPLE_FMT_NONE}, -1, INT_MAX},

  1735. {"video_rate", "set videorate", OFFSET(video_rate), AV_OPT_TYPE_VIDEO_RATE,  {.str = "25"}, 0,     0                   },

  1736. {"duration", "set duration",   OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, INT64_MAX},

  1737. {"color", "set color",   OFFSET(color), AV_OPT_TYPE_COLOR, {.str = "pink"}, 0, 0},

  1738. {"cl", "set channel layout", OFFSET(channel_layout), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64 = AV_CH_LAYOUT_HEXAGONAL}, 0, INT64_MAX},

  1739. {NULL},

  1740. };

  1741. 

  1742. static const char *test_get_name(void *ctx)

  1743. {

  1744.     return "test";

  1745. }

  1746. 

  1747. static const AVClass test_class = {

  1748.     "TestContext",

  1749.     test_get_name,

  1750.     test_options

  1751. };

  1752. 

  1753. int main(void)

  1754. {

  1755.     int i;

  1756. 

  1757.     printf("\nTesting av_set_options_string()\n");

  1758.     {

  1759.         TestContext test_ctx = { 0 };

  1760.         static const char * const options[] = {

  1761.             "",

  1762.             ":",

  1763.             "=",

  1764.             "foo=:",

  1765.             ":=foo",

  1766.             "=foo",

  1767.             "foo=",

  1768.             "foo",

  1769.             "foo=val",

  1770.             "foo==val",

  1771.             "toggle=:",

  1772.             "string=:",

  1773.             "toggle=1 : foo",

  1774.             "toggle=100",

  1775.             "toggle==1",

  1776.             "flags=+mu-lame : num=42: toggle=0",

  1777.             "num=42 : string=blahblah",

  1778.             "rational=0 : rational=1/2 : rational=1/-1",

  1779.             "rational=-1/0",

  1780.             "size=1024x768",

  1781.             "size=pal",

  1782.             "size=bogus",

  1783.             "pix_fmt=yuv420p",

  1784.             "pix_fmt=2",

  1785.             "pix_fmt=bogus",

  1786.             "sample_fmt=s16",

  1787.             "sample_fmt=2",

  1788.             "sample_fmt=bogus",

  1789.             "video_rate=pal",

  1790.             "video_rate=25",

  1791.             "video_rate=30000/1001",

  1792.             "video_rate=30/1.001",

  1793.             "video_rate=bogus",

  1794.             "duration=bogus",

  1795.             "duration=123.45",

  1796.             "duration=1\\:23\\:45.67",

  1797.             "color=blue",

  1798.             "color=0x223300",

  1799.             "color=0x42FF07AA",

  1800.             "cl=stereo+downmix",

  1801.             "cl=foo",

  1802.         };

  1803. 

  1804.         test_ctx.class = &test_class;

  1805.         av_opt_set_defaults(&test_ctx);

  1806. 

  1807.         av_log_set_level(AV_LOG_DEBUG);

  1808. 

  1809.         for (i=0; i < FF_ARRAY_ELEMS(options); i++) {

  1810.             av_log(&test_ctx, AV_LOG_DEBUG, "Setting options string '%s'\n", options[i]);

  1811.             if (av_set_options_string(&test_ctx, options[i], "=", ":") < 0)

  1812.                 av_log(&test_ctx, AV_LOG_ERROR, "Error setting options string: '%s'\n", options[i]);

  1813.             printf("\n");

  1814.         }

  1815.         av_opt_free(&test_ctx);

  1816.     }

  1817. 

  1818.     printf("\nTesting av_opt_set_from_string()\n");

  1819.     {

  1820.         TestContext test_ctx = { 0 };

  1821.         static const char * const options[] = {

  1822.             "",

  1823.             "5",

  1824.             "5:hello",

  1825.             "5:hello:size=pal",

  1826.             "5:size=pal:hello",

  1827.             ":",

  1828.             "=",

  1829.             " 5 : hello : size = pal ",

  1830.             "a_very_long_option_name_that_will_need_to_be_ellipsized_around_here=42"

  1831.         };

  1832.         static const char * const shorthand[] = { "num", "string", NULL };

  1833. 

  1834.         test_ctx.class = &test_class;

  1835.         av_opt_set_defaults(&test_ctx);

  1836. 

  1837.         av_log_set_level(AV_LOG_DEBUG);

  1838. 

  1839.         for (i=0; i < FF_ARRAY_ELEMS(options); i++) {

  1840.             av_log(&test_ctx, AV_LOG_DEBUG, "Setting options string '%s'\n", options[i]);

  1841.             if (av_opt_set_from_string(&test_ctx, options[i], shorthand, "=", ":") < 0)

  1842.                 av_log(&test_ctx, AV_LOG_ERROR, "Error setting options string: '%s'\n", options[i]);

  1843.             printf("\n");

  1844.         }

  1845.         av_opt_free(&test_ctx);

  1846.     }

  1847. 

  1848.     return 0;

  1849. }

  1850. 

  1851. #endif