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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_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 = strlen(val);

  130. 

  131.     av_freep(dst);

  132.     *lendst = 0;

  133. 

  134.     if (len & 1)

  135.         return AVERROR(EINVAL);

  136.     len /= 2;

  137. 

  138.     ptr = bin = av_malloc(len);

  139.     while (*val) {

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

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

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

  143.             av_free(bin);

  144.             return AVERROR(EINVAL);

  145.         }

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

  147.     }

  148.     *dst = bin;

  149.     *lendst = len;

  150. 

  151.     return 0;

  152. }

  153. 

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

  155. {

  156.     av_freep(dst);

  157.     *dst = av_strdup(val);

  158.     return 0;

  159. }

  160. 

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

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

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

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

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

  166. 

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

  168. {

  169.     int ret = 0;

  170.     int num, den;

  171.     char c;

  172. 

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

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

  175.             return ret;

  176.         ret = 0;

  177.     }

  178. 

  179.     for (;;) {

  180.         int i = 0;

  181.         char buf[256];

  182.         int cmd = 0;

  183.         double d;

  184.         int64_t intnum = 1;

  185. 

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

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

  188.                 cmd = *(val++);

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

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

  191.             buf[i] = 0;

  192.         }

  193. 

  194.         {

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

  196.             int res;

  197.             int ci = 0;

  198.             double const_values[64];

  199.             const char * const_names[64];

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

  201.                 d = DEFAULT_NUMVAL(o_named);

  202.             else {

  203.                 if (o->unit) {

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

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

  206.                             o_named->unit &&

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

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

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

  210.                                 return AVERROR_PATCHWELCOME;

  211.                             }

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

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

  214.                         }

  215.                     }

  216.                 }

  217.                 const_names [ci  ] = "default";

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

  219.                 const_names [ci  ] = "max";

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

  221.                 const_names [ci  ] = "min";

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

  223.                 const_names [ci  ] = "none";

  224.                 const_values[ci++] = 0;

  225.                 const_names [ci  ] = "all";

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

  227.                 const_names [ci] = NULL;

  228.                 const_values[ci] = 0;

  229. 

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

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

  232.                 if (res < 0) {

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

  234.                     return res;

  235.                 }

  236.             }

  237.         }

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

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

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

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

  242.         }

  243. 

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

  245.             return ret;

  246.         val += i;

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

  248.             return 0;

  249.     }

  250. 

  251.     return 0;

  252. }

  253. 

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

  255. {

  256.     int ret;

  257. 

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

  259.         dst[0] =

  260.         dst[1] = 0;

  261.         return 0;

  262.     }

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

  264.     if (ret < 0)

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

  266.     return ret;

  267. }

  268. 

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

  270. {

  271.     int ret;

  272.     if (!val) {

  273.         ret = AVERROR(EINVAL);

  274.     } else {

  275.         ret = av_parse_video_rate(dst, val);

  276.     }

  277.     if (ret < 0)

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

  279.     return ret;

  280. }

  281. 

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

  283. {

  284.     int ret;

  285. 

  286.     if (!val) {

  287.         return 0;

  288.     } else {

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

  290.         if (ret < 0)

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

  292.         return ret;

  293.     }

  294.     return 0;

  295. }

  296. 

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

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

  299. {

  300.     int fmt, min, max;

  301. 

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

  303.         fmt = -1;

  304.     } else {

  305.         fmt = get_fmt(val);

  306.         if (fmt == -1) {

  307.             char *tail;

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

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

  310.                 av_log(obj, AV_LOG_ERROR,

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

  312.                 return AVERROR(EINVAL);

  313.             }

  314.         }

  315.     }

  316. 

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

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

  319. 

  320.     // hack for compatibility with old ffmpeg

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

  322.         min = -1;

  323.         max = fmt_nb-1;

  324.     }

  325. 

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

  327.         av_log(obj, AV_LOG_ERROR,

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

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

  330.         return AVERROR(ERANGE);

  331.     }

  332. 

  333.     *(int *)dst = fmt;

  334.     return 0;

  335. }

  336. 

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

  338. {

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

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

  341. }

  342. 

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

  344. {

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

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

  347. }

  348. 

  349. #if FF_API_OLD_AVOPTIONS

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

  351. {

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

  353.     if (o_out)

  354.         *o_out = o;

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

  356. }

  357. #endif

  358. 

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

  360. {

  361.     int ret = 0;

  362.     void *dst, *target_obj;

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

  364.     if (!o || !target_obj)

  365.         return AVERROR_OPTION_NOT_FOUND;

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

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

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

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

  370.                  o->type != AV_OPT_TYPE_CHANNEL_LAYOUT))

  371.         return AVERROR(EINVAL);

  372. 

  373.     if (o->flags & AV_OPT_FLAG_READONLY)

  374.         return AVERROR(EINVAL);

  375. 

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

  377.     switch (o->type) {

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

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

  380.     case AV_OPT_TYPE_FLAGS:

  381.     case AV_OPT_TYPE_INT:

  382.     case AV_OPT_TYPE_INT64:

  383.     case AV_OPT_TYPE_FLOAT:

  384.     case AV_OPT_TYPE_DOUBLE:

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

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

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

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

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

  390.     case AV_OPT_TYPE_DURATION:

  391.         if (!val) {

  392.             *(int64_t *)dst = 0;

  393.             return 0;

  394.         } else {

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

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

  397.             return ret;

  398.         }

  399.         break;

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

  401.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

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

  403.             *(int64_t *)dst = 0;

  404.         } else {

  405. #if FF_API_GET_CHANNEL_LAYOUT_COMPAT

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

  407. #else

  408.             int64_t cl = av_get_channel_layout(val);

  409. #endif

  410.             if (!cl) {

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

  412.                 ret = AVERROR(EINVAL);

  413.             }

  414.             *(int64_t *)dst = cl;

  415.             return ret;

  416.         }

  417.         break;

  418.     }

  419. 

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

  421.     return AVERROR(EINVAL);

  422. }

  423. 

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

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

  426.     {\

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

  428.             return AVERROR(EINVAL);\

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

  430.     }

  431. 

  432. OPT_EVAL_NUMBER(flags,  AV_OPT_TYPE_FLAGS,    int)

  433. OPT_EVAL_NUMBER(int,    AV_OPT_TYPE_INT,      int)

  434. OPT_EVAL_NUMBER(int64,  AV_OPT_TYPE_INT64,    int64_t)

  435. OPT_EVAL_NUMBER(float,  AV_OPT_TYPE_FLOAT,    float)

  436. OPT_EVAL_NUMBER(double, AV_OPT_TYPE_DOUBLE,   double)

  437. OPT_EVAL_NUMBER(q,      AV_OPT_TYPE_RATIONAL, AVRational)

  438. 

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

  440.                                   int search_flags)

  441. {

  442.     void *dst, *target_obj;

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

  444. 

  445.     if (!o || !target_obj)

  446.         return AVERROR_OPTION_NOT_FOUND;

  447. 

  448.     if (o->flags & AV_OPT_FLAG_READONLY)

  449.         return AVERROR(EINVAL);

  450. 

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

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

  453. }

  454. 

  455. #if FF_API_OLD_AVOPTIONS

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

  457. {

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

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

  460.         return NULL;

  461.     return o;

  462. }

  463. 

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

  465. {

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

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

  468.         return NULL;

  469.     return o;

  470. }

  471. 

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

  473. {

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

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

  476.         return NULL;

  477.     return o;

  478. }

  479. #endif

  480. 

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

  482. {

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

  484. }

  485. 

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

  487. {

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

  489. }

  490. 

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

  492. {

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

  494. }

  495. 

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

  497. {

  498.     void *target_obj;

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

  500.     uint8_t *ptr;

  501.     uint8_t **dst;

  502.     int *lendst;

  503. 

  504.     if (!o || !target_obj)

  505.         return AVERROR_OPTION_NOT_FOUND;

  506. 

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

  508.         return AVERROR(EINVAL);

  509. 

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

  511.     if (len && !ptr)

  512.         return AVERROR(ENOMEM);

  513. 

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

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

  516. 

  517.     av_free(*dst);

  518.     *dst = ptr;

  519.     *lendst = len;

  520.     if (len)

  521.         memcpy(ptr, val, len);

  522. 

  523.     return 0;

  524. }

  525. 

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

  527. {

  528.     void *target_obj;

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

  530. 

  531.     if (!o || !target_obj)

  532.         return AVERROR_OPTION_NOT_FOUND;

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

  534.         av_log(obj, AV_LOG_ERROR,

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

  536.         return AVERROR(EINVAL);

  537.     }

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

  539.         av_log(obj, AV_LOG_ERROR,

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

  541.         return AVERROR(EINVAL);

  542.     }

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

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

  545.     return 0;

  546. }

  547. 

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

  549. {

  550.     void *target_obj;

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

  552. 

  553.     if (!o || !target_obj)

  554.         return AVERROR_OPTION_NOT_FOUND;

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

  556.         av_log(obj, AV_LOG_ERROR,

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

  558.         return AVERROR(EINVAL);

  559.     }

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

  561.         return AVERROR(EINVAL);

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

  563. }

  564. 

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

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

  567. {

  568.     void *target_obj;

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

  570.                                      search_flags, &target_obj);

  571.     int min, max;

  572. 

  573.     if (!o || !target_obj)

  574.         return AVERROR_OPTION_NOT_FOUND;

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

  576.         av_log(obj, AV_LOG_ERROR,

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

  578.         return AVERROR(EINVAL);

  579.     }

  580. 

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

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

  583. 

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

  585.         av_log(obj, AV_LOG_ERROR,

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

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

  588.         return AVERROR(ERANGE);

  589.     }

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

  591.     return 0;

  592. }

  593. 

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

  595. {

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

  597. }

  598. 

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

  600. {

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

  602. }

  603. 

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

  605. {

  606.     void *target_obj;

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

  608. 

  609.     if (!o || !target_obj)

  610.         return AVERROR_OPTION_NOT_FOUND;

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

  612.         av_log(obj, AV_LOG_ERROR,

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

  614.         return AVERROR(EINVAL);

  615.     }

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

  617.     return 0;

  618. }

  619. 

  620. #if FF_API_OLD_AVOPTIONS

  621. /**

  622.  *

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

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

  625.  */

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

  627. {

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

  629.     void *dst;

  630.     uint8_t *bin;

  631.     int len, i;

  632.     if (!o)

  633.         return NULL;

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

  635.         return NULL;

  636. 

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

  638.     if (o_out) *o_out= o;

  639. 

  640.     switch (o->type) {

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

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

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

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

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

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

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

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

  649.     case AV_OPT_TYPE_BINARY:

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

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

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

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

  654.         break;

  655.     default: return NULL;

  656.     }

  657.     return buf;

  658. }

  659. #endif

  660. 

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

  662. {

  663.     void *target_obj;

  664.     AVDictionary **dst;

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

  666. 

  667.     if (!o || !target_obj)

  668.         return AVERROR_OPTION_NOT_FOUND;

  669.     if (o->flags & AV_OPT_FLAG_READONLY)

  670.         return AVERROR(EINVAL);

  671. 

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

  673.     av_dict_free(dst);

  674.     av_dict_copy(dst, val, 0);

  675. 

  676.     return 0;

  677. }

  678. 

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

  680. {

  681.     void *dst, *target_obj;

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

  683.     uint8_t *bin, buf[128];

  684.     int len, i, ret;

  685.     int64_t i64;

  686. 

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

  688.         return AVERROR_OPTION_NOT_FOUND;

  689. 

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

  691. 

  692.     buf[0] = 0;

  693.     switch (o->type) {

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

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

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

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

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

  699.     case AV_OPT_TYPE_VIDEO_RATE:

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

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

  702.     case AV_OPT_TYPE_STRING:

  703.         if (*(uint8_t**)dst)

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

  705.         else

  706.             *out_val = av_strdup("");

  707.         return 0;

  708.     case AV_OPT_TYPE_BINARY:

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

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

  711.             return AVERROR(EINVAL);

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

  713.             return AVERROR(ENOMEM);

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

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

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

  717.         return 0;

  718.     case AV_OPT_TYPE_IMAGE_SIZE:

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

  720.         break;

  721.     case AV_OPT_TYPE_PIXEL_FMT:

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

  723.         break;

  724.     case AV_OPT_TYPE_SAMPLE_FMT:

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

  726.         break;

  727.     case AV_OPT_TYPE_DURATION:

  728.         i64 = *(int64_t *)dst;

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

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

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

  732.         break;

  733.     case AV_OPT_TYPE_COLOR:

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

  735.         break;

  736.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  737.         i64 = *(int64_t *)dst;

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

  739.         break;

  740.     default:

  741.         return AVERROR(EINVAL);

  742.     }

  743. 

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

  745.         return AVERROR(EINVAL);

  746.     *out_val = av_strdup(buf);

  747.     return 0;

  748. }

  749. 

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

  751.                       int search_flags)

  752. {

  753.     void *dst, *target_obj;

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

  755.     if (!o || !target_obj)

  756.         goto error;

  757. 

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

  759. 

  760.     if (o_out) *o_out= o;

  761. 

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

  763. 

  764. error:

  765.     *den=*intnum=0;

  766.     return -1;

  767. }

  768. 

  769. #if FF_API_OLD_AVOPTIONS

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

  771. {

  772.     int64_t intnum=1;

  773.     double num=1;

  774.     int den=1;

  775. 

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

  777.         return NAN;

  778.     return num*intnum/den;

  779. }

  780. 

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

  782. {

  783.     int64_t intnum=1;

  784.     double num=1;

  785.     int den=1;

  786. 

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

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

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

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

  791.     else

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

  793. }

  794. 

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

  796. {

  797.     int64_t intnum=1;

  798.     double num=1;

  799.     int den=1;

  800. 

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

  802.         return -1;

  803.     return num*intnum/den;

  804. }

  805. #endif

  806. 

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

  808. {

  809.     int64_t intnum = 1;

  810.     double     num = 1;

  811.     int   ret, den = 1;

  812. 

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

  814.         return ret;

  815.     *out_val = num*intnum/den;

  816.     return 0;

  817. }

  818. 

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

  820. {

  821.     int64_t intnum = 1;

  822.     double     num = 1;

  823.     int   ret, den = 1;

  824. 

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

  826.         return ret;

  827.     *out_val = num*intnum/den;

  828.     return 0;

  829. }

  830. 

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

  832. {

  833.     int64_t intnum = 1;

  834.     double     num = 1;

  835.     int   ret, den = 1;

  836. 

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

  838.         return ret;

  839. 

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

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

  842.     else

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

  844.     return 0;

  845. }

  846. 

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

  848. {

  849.     void *dst, *target_obj;

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

  851.     if (!o || !target_obj)

  852.         return AVERROR_OPTION_NOT_FOUND;

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

  854.         av_log(obj, AV_LOG_ERROR,

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

  856.         return AVERROR(EINVAL);

  857.     }

  858. 

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

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

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

  862.     return 0;

  863. }

  864. 

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

  866. {

  867.     int64_t intnum = 1;

  868.     double     num = 1;

  869.     int   ret, den = 1;

  870. 

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

  872.         return ret;

  873. 

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

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

  876.     else

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

  878.     return 0;

  879. }

  880. 

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

  882.                       enum AVOptionType type, const char *desc)

  883. {

  884.     void *dst, *target_obj;

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

  886.     if (!o || !target_obj)

  887.         return AVERROR_OPTION_NOT_FOUND;

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

  889.         av_log(obj, AV_LOG_ERROR,

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

  891.         return AVERROR(EINVAL);

  892.     }

  893. 

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

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

  896.     return 0;

  897. }

  898. 

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

  900. {

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

  902. }

  903. 

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

  905. {

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

  907. }

  908. 

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

  910. {

  911.     void *dst, *target_obj;

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

  913.     if (!o || !target_obj)

  914.         return AVERROR_OPTION_NOT_FOUND;

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

  916.         av_log(obj, AV_LOG_ERROR,

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

  918.         return AVERROR(EINVAL);

  919.     }

  920. 

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

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

  923.     return 0;

  924. }

  925. 

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

  927. {

  928.     void *target_obj;

  929.     AVDictionary *src;

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

  931. 

  932.     if (!o || !target_obj)

  933.         return AVERROR_OPTION_NOT_FOUND;

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

  935.         return AVERROR(EINVAL);

  936. 

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

  938.     av_dict_copy(out_val, src, 0);

  939. 

  940.     return 0;

  941. }

  942. 

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

  944. {

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

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

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

  948.     int64_t res;

  949. 

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

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

  952.         return 0;

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

  954. }

  955. 

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

  957. {

  958.     if      (d == INT_MAX) {

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  984.     } else {

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

  986.     }

  987. }

  988. 

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

  990.                      int req_flags, int rej_flags)

  991. {

  992.     const AVOption *opt=NULL;

  993.     AVOptionRanges *r;

  994.     int i;

  995. 

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

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

  998.             continue;

  999. 

  1000.         /* Don't print CONST's on level one.

  1001.          * Don't print anything but CONST's on level two.

  1002.          * Only print items from the requested unit.

  1003.          */

  1004.         if (!unit && opt->type==AV_OPT_TYPE_CONST)

  1005.             continue;

  1006.         else if (unit && opt->type!=AV_OPT_TYPE_CONST)

  1007.             continue;

  1008.         else if (unit && opt->type==AV_OPT_TYPE_CONST && strcmp(unit, opt->unit))

  1009.             continue;

  1010.         else if (unit && opt->type == AV_OPT_TYPE_CONST)

  1011.             av_log(av_log_obj, AV_LOG_INFO, "     %-15s ", opt->name);

  1012.         else

  1013.             av_log(av_log_obj, AV_LOG_INFO, "  %s%-17s ",

  1014.                    (opt->flags & AV_OPT_FLAG_FILTERING_PARAM) ? "" : "-",

  1015.                    opt->name);

  1016. 

  1017.         switch (opt->type) {

  1018.             case AV_OPT_TYPE_FLAGS:

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

  1020.                 break;

  1021.             case AV_OPT_TYPE_INT:

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

  1023.                 break;

  1024.             case AV_OPT_TYPE_INT64:

  1025.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<int64>");

  1026.                 break;

  1027.             case AV_OPT_TYPE_DOUBLE:

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

  1029.                 break;

  1030.             case AV_OPT_TYPE_FLOAT:

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

  1032.                 break;

  1033.             case AV_OPT_TYPE_STRING:

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

  1035.                 break;

  1036.             case AV_OPT_TYPE_RATIONAL:

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

  1038.                 break;

  1039.             case AV_OPT_TYPE_BINARY:

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

  1041.                 break;

  1042.             case AV_OPT_TYPE_IMAGE_SIZE:

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

  1044.                 break;

  1045.             case AV_OPT_TYPE_VIDEO_RATE:

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

  1047.                 break;

  1048.             case AV_OPT_TYPE_PIXEL_FMT:

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

  1050.                 break;

  1051.             case AV_OPT_TYPE_SAMPLE_FMT:

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

  1053.                 break;

  1054.             case AV_OPT_TYPE_DURATION:

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

  1056.                 break;

  1057.             case AV_OPT_TYPE_COLOR:

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

  1059.                 break;

  1060.             case AV_OPT_TYPE_CHANNEL_LAYOUT:

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

  1062.                 break;

  1063.             case AV_OPT_TYPE_CONST:

  1064.             default:

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

  1066.                 break;

  1067.         }

  1068.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_ENCODING_PARAM) ? 'E' : '.');

  1069.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_DECODING_PARAM) ? 'D' : '.');

  1070.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_FILTERING_PARAM)? 'F' : '.');

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

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

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

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

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

  1076. 

  1077.         if (opt->help)

  1078.             av_log(av_log_obj, AV_LOG_INFO, " %s", opt->help);

  1079. 

  1080.         if (av_opt_query_ranges(&r, obj, opt->name, AV_OPT_SEARCH_FAKE_OBJ) >= 0) {

  1081.             switch (opt->type) {

  1082.             case AV_OPT_TYPE_INT:

  1083.             case AV_OPT_TYPE_INT64:

  1084.             case AV_OPT_TYPE_DOUBLE:

  1085.             case AV_OPT_TYPE_FLOAT:

  1086.             case AV_OPT_TYPE_RATIONAL:

  1087.                 for (i = 0; i < r->nb_ranges; i++) {

  1088.                     av_log(av_log_obj, AV_LOG_INFO, " (from ");

  1089.                     log_value(av_log_obj, AV_LOG_INFO, r->range[i]->value_min);

  1090.                     av_log(av_log_obj, AV_LOG_INFO, " to ");

  1091.                     log_value(av_log_obj, AV_LOG_INFO, r->range[i]->value_max);

  1092.                     av_log(av_log_obj, AV_LOG_INFO, ")");

  1093.                 }

  1094.                 break;

  1095.             }

  1096.             av_opt_freep_ranges(&r);

  1097.         }

  1098. 

  1099.         if (opt->type != AV_OPT_TYPE_CONST  &&

  1100.             opt->type != AV_OPT_TYPE_BINARY &&

  1101.                 !((opt->type == AV_OPT_TYPE_COLOR      ||

  1102.                    opt->type == AV_OPT_TYPE_IMAGE_SIZE ||

  1103.                    opt->type == AV_OPT_TYPE_STRING     ||

  1104.                    opt->type == AV_OPT_TYPE_VIDEO_RATE) &&

  1105.                   !opt->default_val.str)) {

  1106.             av_log(av_log_obj, AV_LOG_INFO, " (default ");

  1107.             switch (opt->type) {

  1108.             case AV_OPT_TYPE_FLAGS:

  1109.                 av_log(av_log_obj, AV_LOG_INFO, "%"PRIX64, opt->default_val.i64);

  1110.                 break;

  1111.             case AV_OPT_TYPE_DURATION:

  1112.             case AV_OPT_TYPE_INT:

  1113.             case AV_OPT_TYPE_INT64:

  1114.                 log_value(av_log_obj, AV_LOG_INFO, opt->default_val.i64);

  1115.                 break;

  1116.             case AV_OPT_TYPE_DOUBLE:

  1117.             case AV_OPT_TYPE_FLOAT:

  1118.                 log_value(av_log_obj, AV_LOG_INFO, opt->default_val.dbl);

  1119.                 break;

  1120.             case AV_OPT_TYPE_RATIONAL: {

  1121.                 AVRational q = av_d2q(opt->default_val.dbl, INT_MAX);

  1122.                 av_log(av_log_obj, AV_LOG_INFO, "%d/%d", q.num, q.den); }

  1123.                 break;

  1124.             case AV_OPT_TYPE_PIXEL_FMT:

  1125.                 av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(av_get_pix_fmt_name(opt->default_val.i64), "none"));

  1126.                 break;

  1127.             case AV_OPT_TYPE_SAMPLE_FMT:

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

  1129.                 break;

  1130.             case AV_OPT_TYPE_COLOR:

  1131.             case AV_OPT_TYPE_IMAGE_SIZE:

  1132.             case AV_OPT_TYPE_STRING:

  1133.             case AV_OPT_TYPE_VIDEO_RATE:

  1134.                 av_log(av_log_obj, AV_LOG_INFO, "\"%s\"", opt->default_val.str);

  1135.                 break;

  1136.             case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1137.                 av_log(av_log_obj, AV_LOG_INFO, "0x%"PRIx64, opt->default_val.i64);

  1138.                 break;

  1139.             }

  1140.             av_log(av_log_obj, AV_LOG_INFO, ")");

  1141.         }

  1142. 

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

  1144.         if (opt->unit && opt->type != AV_OPT_TYPE_CONST) {

  1145.             opt_list(obj, av_log_obj, opt->unit, req_flags, rej_flags);

  1146.         }

  1147.     }

  1148. }

  1149. 

  1150. int av_opt_show2(void *obj, void *av_log_obj, int req_flags, int rej_flags)

  1151. {

  1152.     if (!obj)

  1153.         return -1;

  1154. 

  1155.     av_log(av_log_obj, AV_LOG_INFO, "%s AVOptions:\n", (*(AVClass**)obj)->class_name);

  1156. 

  1157.     opt_list(obj, av_log_obj, NULL, req_flags, rej_flags);

  1158. 

  1159.     return 0;

  1160. }

  1161. 

  1162. void av_opt_set_defaults(void *s)

  1163. {

  1164. #if FF_API_OLD_AVOPTIONS

  1165.     av_opt_set_defaults2(s, 0, 0);

  1166. }

  1167. 

  1168. void av_opt_set_defaults2(void *s, int mask, int flags)

  1169. {

  1170. #endif

  1171.     const AVOption *opt = NULL;

  1172.     while ((opt = av_opt_next(s, opt))) {

  1173.         void *dst = ((uint8_t*)s) + opt->offset;

  1174. #if FF_API_OLD_AVOPTIONS

  1175.         if ((opt->flags & mask) != flags)

  1176.             continue;

  1177. #endif

  1178. 

  1179.         if (opt->flags & AV_OPT_FLAG_READONLY)

  1180.             continue;

  1181. 

  1182.         switch (opt->type) {

  1183.             case AV_OPT_TYPE_CONST:

  1184.                 /* Nothing to be done here */

  1185.             break;

  1186.             case AV_OPT_TYPE_FLAGS:

  1187.             case AV_OPT_TYPE_INT:

  1188.             case AV_OPT_TYPE_INT64:

  1189.             case AV_OPT_TYPE_DURATION:

  1190.             case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1191.                 write_number(s, opt, dst, 1, 1, opt->default_val.i64);

  1192.             break;

  1193.             case AV_OPT_TYPE_DOUBLE:

  1194.             case AV_OPT_TYPE_FLOAT: {

  1195.                 double val;

  1196.                 val = opt->default_val.dbl;

  1197.                 write_number(s, opt, dst, val, 1, 1);

  1198.             }

  1199.             break;

  1200.             case AV_OPT_TYPE_RATIONAL: {

  1201.                 AVRational val;

  1202.                 val = av_d2q(opt->default_val.dbl, INT_MAX);

  1203.                 write_number(s, opt, dst, 1, val.den, val.num);

  1204.             }

  1205.             break;

  1206.             case AV_OPT_TYPE_COLOR:

  1207.                 set_string_color(s, opt, opt->default_val.str, dst);

  1208.                 break;

  1209.             case AV_OPT_TYPE_STRING:

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

  1211.                 break;

  1212.             case AV_OPT_TYPE_IMAGE_SIZE:

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

  1214.                 break;

  1215.             case AV_OPT_TYPE_VIDEO_RATE:

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

  1217.                 break;

  1218.             case AV_OPT_TYPE_PIXEL_FMT:

  1219.                 write_number(s, opt, dst, 1, 1, opt->default_val.i64);

  1220.                 break;

  1221.             case AV_OPT_TYPE_SAMPLE_FMT:

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

  1223.                 break;

  1224.             case AV_OPT_TYPE_BINARY:

  1225.             case AV_OPT_TYPE_DICT:

  1226.                 /* Cannot set defaults for these types */

  1227.             break;

  1228.             default:

  1229.                 av_log(s, AV_LOG_DEBUG, "AVOption type %d of option %s not implemented yet\n", opt->type, opt->name);

  1230.         }

  1231.     }

  1232. }

  1233. 

  1234. /**

  1235.  * Store the value in the field in ctx that is named like key.

  1236.  * ctx must be an AVClass context, storing is done using AVOptions.

  1237.  *

  1238.  * @param buf the string to parse, buf will be updated to point at the

  1239.  * separator just after the parsed key/value pair

  1240.  * @param key_val_sep a 0-terminated list of characters used to

  1241.  * separate key from value

  1242.  * @param pairs_sep a 0-terminated list of characters used to separate

  1243.  * two pairs from each other

  1244.  * @return 0 if the key/value pair has been successfully parsed and

  1245.  * set, or a negative value corresponding to an AVERROR code in case

  1246.  * of error:

  1247.  * AVERROR(EINVAL) if the key/value pair cannot be parsed,

  1248.  * the error code issued by av_opt_set() if the key/value pair

  1249.  * cannot be set

  1250.  */

  1251. static int parse_key_value_pair(void *ctx, const char **buf,

  1252.                                 const char *key_val_sep, const char *pairs_sep)

  1253. {

  1254.     char *key = av_get_token(buf, key_val_sep);

  1255.     char *val;

  1256.     int ret;

  1257. 

  1258.     if (!key)

  1259.         return AVERROR(ENOMEM);

  1260. 

  1261.     if (*key && strspn(*buf, key_val_sep)) {

  1262.         (*buf)++;

  1263.         val = av_get_token(buf, pairs_sep);

  1264.         if (!val) {

  1265.             av_freep(&key);

  1266.             return AVERROR(ENOMEM);

  1267.         }

  1268.     } else {

  1269.         av_log(ctx, AV_LOG_ERROR, "Missing key or no key/value separator found after key '%s'\n", key);

  1270.         av_free(key);

  1271.         return AVERROR(EINVAL);

  1272.     }

  1273. 

  1274.     av_log(ctx, AV_LOG_DEBUG, "Setting entry with key '%s' to value '%s'\n", key, val);

  1275. 

  1276.     ret = av_opt_set(ctx, key, val, AV_OPT_SEARCH_CHILDREN);

  1277.     if (ret == AVERROR_OPTION_NOT_FOUND)

  1278.         av_log(ctx, AV_LOG_ERROR, "Key '%s' not found.\n", key);

  1279. 

  1280.     av_free(key);

  1281.     av_free(val);

  1282.     return ret;

  1283. }

  1284. 

  1285. int av_set_options_string(void *ctx, const char *opts,

  1286.                           const char *key_val_sep, const char *pairs_sep)

  1287. {

  1288.     int ret, count = 0;

  1289. 

  1290.     if (!opts)

  1291.         return 0;

  1292. 

  1293.     while (*opts) {

  1294.         if ((ret = parse_key_value_pair(ctx, &opts, key_val_sep, pairs_sep)) < 0)

  1295.             return ret;

  1296.         count++;

  1297. 

  1298.         if (*opts)

  1299.             opts++;

  1300.     }

  1301. 

  1302.     return count;

  1303. }

  1304. 

  1305. #define WHITESPACES " \n\t"

  1306. 

  1307. static int is_key_char(char c)

  1308. {

  1309.     return (unsigned)((c | 32) - 'a') < 26 ||

  1310.            (unsigned)(c - '0') < 10 ||

  1311.            c == '-' || c == '_' || c == '/' || c == '.';

  1312. }

  1313. 

  1314. /**

  1315.  * Read a key from a string.

  1316.  *

  1317.  * The key consists of is_key_char characters and must be terminated by a

  1318.  * character from the delim string; spaces are ignored.

  1319.  *

  1320.  * @return  0 for success (even with ellipsis), <0 for failure

  1321.  */

  1322. static int get_key(const char **ropts, const char *delim, char **rkey)

  1323. {

  1324.     const char *opts = *ropts;

  1325.     const char *key_start, *key_end;

  1326. 

  1327.     key_start = opts += strspn(opts, WHITESPACES);

  1328.     while (is_key_char(*opts))

  1329.         opts++;

  1330.     key_end = opts;

  1331.     opts += strspn(opts, WHITESPACES);

  1332.     if (!*opts || !strchr(delim, *opts))

  1333.         return AVERROR(EINVAL);

  1334.     opts++;

  1335.     if (!(*rkey = av_malloc(key_end - key_start + 1)))

  1336.         return AVERROR(ENOMEM);

  1337.     memcpy(*rkey, key_start, key_end - key_start);

  1338.     (*rkey)[key_end - key_start] = 0;

  1339.     *ropts = opts;

  1340.     return 0;

  1341. }

  1342. 

  1343. int av_opt_get_key_value(const char **ropts,

  1344.                          const char *key_val_sep, const char *pairs_sep,

  1345.                          unsigned flags,

  1346.                          char **rkey, char **rval)

  1347. {

  1348.     int ret;

  1349.     char *key = NULL, *val;

  1350.     const char *opts = *ropts;

  1351. 

  1352.     if ((ret = get_key(&opts, key_val_sep, &key)) < 0 &&

  1353.         !(flags & AV_OPT_FLAG_IMPLICIT_KEY))

  1354.         return AVERROR(EINVAL);

  1355.     if (!(val = av_get_token(&opts, pairs_sep))) {

  1356.         av_free(key);

  1357.         return AVERROR(ENOMEM);

  1358.     }

  1359.     *ropts = opts;

  1360.     *rkey  = key;

  1361.     *rval  = val;

  1362.     return 0;

  1363. }

  1364. 

  1365. int av_opt_set_from_string(void *ctx, const char *opts,

  1366.                            const char *const *shorthand,

  1367.                            const char *key_val_sep, const char *pairs_sep)

  1368. {

  1369.     int ret, count = 0;

  1370.     const char *dummy_shorthand = NULL;

  1371.     char *av_uninit(parsed_key), *av_uninit(value);

  1372.     const char *key;

  1373. 

  1374.     if (!opts)

  1375.         return 0;

  1376.     if (!shorthand)

  1377.         shorthand = &dummy_shorthand;

  1378. 

  1379.     while (*opts) {

  1380.         ret = av_opt_get_key_value(&opts, key_val_sep, pairs_sep,

  1381.                                    *shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,

  1382.                                    &parsed_key, &value);

  1383.         if (ret < 0) {

  1384.             if (ret == AVERROR(EINVAL))

  1385.                 av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", opts);

  1386.             else

  1387.                 av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", opts,

  1388.                        av_err2str(ret));

  1389.             return ret;

  1390.         }

  1391.         if (*opts)

  1392.             opts++;

  1393.         if (parsed_key) {

  1394.             key = parsed_key;

  1395.             while (*shorthand) /* discard all remaining shorthand */

  1396.                 shorthand++;

  1397.         } else {

  1398.             key = *(shorthand++);

  1399.         }

  1400. 

  1401.         av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);

  1402.         if ((ret = av_opt_set(ctx, key, value, 0)) < 0) {

  1403.             if (ret == AVERROR_OPTION_NOT_FOUND)

  1404.                 av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);

  1405.             av_free(value);

  1406.             av_free(parsed_key);

  1407.             return ret;

  1408.         }

  1409. 

  1410.         av_free(value);

  1411.         av_free(parsed_key);

  1412.         count++;

  1413.     }

  1414.     return count;

  1415. }

  1416. 

  1417. void av_opt_free(void *obj)

  1418. {

  1419.     const AVOption *o = NULL;

  1420.     while ((o = av_opt_next(obj, o))) {

  1421.         switch (o->type) {

  1422.         case AV_OPT_TYPE_STRING:

  1423.         case AV_OPT_TYPE_BINARY:

  1424.             av_freep((uint8_t *)obj + o->offset);

  1425.             break;

  1426. 

  1427.         case AV_OPT_TYPE_DICT:

  1428.             av_dict_free((AVDictionary **)(((uint8_t *)obj) + o->offset));

  1429.             break;

  1430. 

  1431.         default:

  1432.             break;

  1433.         }

  1434.     }

  1435. }

  1436. 

  1437. int av_opt_set_dict2(void *obj, AVDictionary **options, int search_flags)

  1438. {

  1439.     AVDictionaryEntry *t = NULL;

  1440.     AVDictionary    *tmp = NULL;

  1441.     int ret = 0;

  1442. 

  1443.     if (!options)

  1444.         return 0;

  1445. 

  1446.     while ((t = av_dict_get(*options, "", t, AV_DICT_IGNORE_SUFFIX))) {

  1447.         ret = av_opt_set(obj, t->key, t->value, search_flags);

  1448.         if (ret == AVERROR_OPTION_NOT_FOUND)

  1449.             av_dict_set(&tmp, t->key, t->value, 0);

  1450.         else if (ret < 0) {

  1451.             av_log(obj, AV_LOG_ERROR, "Error setting option %s to value %s.\n", t->key, t->value);

  1452.             break;

  1453.         }

  1454.         ret = 0;

  1455.     }

  1456.     av_dict_free(options);

  1457.     *options = tmp;

  1458.     return ret;

  1459. }

  1460. 

  1461. int av_opt_set_dict(void *obj, AVDictionary **options)

  1462. {

  1463.     return av_opt_set_dict2(obj, options, 0);

  1464. }

  1465. 

  1466. const AVOption *av_opt_find(void *obj, const char *name, const char *unit,

  1467.                             int opt_flags, int search_flags)

  1468. {

  1469.     return av_opt_find2(obj, name, unit, opt_flags, search_flags, NULL);

  1470. }

  1471. 

  1472. const AVOption *av_opt_find2(void *obj, const char *name, const char *unit,

  1473.                              int opt_flags, int search_flags, void **target_obj)

  1474. {

  1475.     const AVClass  *c;

  1476.     const AVOption *o = NULL;

  1477. 

  1478.     if(!obj)

  1479.         return NULL;

  1480. 

  1481.     c= *(AVClass**)obj;

  1482. 

  1483.     if (!c)

  1484.         return NULL;

  1485. 

  1486.     if (search_flags & AV_OPT_SEARCH_CHILDREN) {

  1487.         if (search_flags & AV_OPT_SEARCH_FAKE_OBJ) {

  1488.             const AVClass *child = NULL;

  1489.             while (child = av_opt_child_class_next(c, child))

  1490.                 if (o = av_opt_find2(&child, name, unit, opt_flags, search_flags, NULL))

  1491.                     return o;

  1492.         } else {

  1493.             void *child = NULL;

  1494.             while (child = av_opt_child_next(obj, child))

  1495.                 if (o = av_opt_find2(child, name, unit, opt_flags, search_flags, target_obj))

  1496.                     return o;

  1497.         }

  1498.     }

  1499. 

  1500.     while (o = av_opt_next(obj, o)) {

  1501.         if (!strcmp(o->name, name) && (o->flags & opt_flags) == opt_flags &&

  1502.             ((!unit && o->type != AV_OPT_TYPE_CONST) ||

  1503.              (unit  && o->type == AV_OPT_TYPE_CONST && o->unit && !strcmp(o->unit, unit)))) {

  1504.             if (target_obj) {

  1505.                 if (!(search_flags & AV_OPT_SEARCH_FAKE_OBJ))

  1506.                     *target_obj = obj;

  1507.                 else

  1508.                     *target_obj = NULL;

  1509.             }

  1510.             return o;

  1511.         }

  1512.     }

  1513.     return NULL;

  1514. }

  1515. 

  1516. void *av_opt_child_next(void *obj, void *prev)

  1517. {

  1518.     const AVClass *c = *(AVClass**)obj;

  1519.     if (c->child_next)

  1520.         return c->child_next(obj, prev);

  1521.     return NULL;

  1522. }

  1523. 

  1524. const AVClass *av_opt_child_class_next(const AVClass *parent, const AVClass *prev)

  1525. {

  1526.     if (parent->child_class_next)

  1527.         return parent->child_class_next(prev);

  1528.     return NULL;

  1529. }

  1530. 

  1531. void *av_opt_ptr(const AVClass *class, void *obj, const char *name)

  1532. {

  1533.     const AVOption *opt= av_opt_find2(&class, name, NULL, 0, AV_OPT_SEARCH_FAKE_OBJ, NULL);

  1534.     if(!opt)

  1535.         return NULL;

  1536.     return (uint8_t*)obj + opt->offset;

  1537. }

  1538. 

  1539. static int opt_size(enum AVOptionType type)

  1540. {

  1541.     switch(type) {

  1542.     case AV_OPT_TYPE_INT:

  1543.     case AV_OPT_TYPE_FLAGS:     return sizeof(int);

  1544.     case AV_OPT_TYPE_DURATION:

  1545.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1546.     case AV_OPT_TYPE_INT64:     return sizeof(int64_t);

  1547.     case AV_OPT_TYPE_DOUBLE:    return sizeof(double);

  1548.     case AV_OPT_TYPE_FLOAT:     return sizeof(float);

  1549.     case AV_OPT_TYPE_STRING:    return sizeof(uint8_t*);

  1550.     case AV_OPT_TYPE_VIDEO_RATE:

  1551.     case AV_OPT_TYPE_RATIONAL:  return sizeof(AVRational);

  1552.     case AV_OPT_TYPE_BINARY:    return sizeof(uint8_t*) + sizeof(int);

  1553.     case AV_OPT_TYPE_IMAGE_SIZE:return sizeof(int[2]);

  1554.     case AV_OPT_TYPE_PIXEL_FMT: return sizeof(enum AVPixelFormat);

  1555.     case AV_OPT_TYPE_SAMPLE_FMT:return sizeof(enum AVSampleFormat);

  1556.     case AV_OPT_TYPE_COLOR:     return 4;

  1557.     }

  1558.     return 0;

  1559. }

  1560. 

  1561. int av_opt_copy(void *dst, void *src)

  1562. {

  1563.     const AVOption *o = NULL;

  1564.     const AVClass *c;

  1565.     int ret = 0;

  1566. 

  1567.     if (!src)

  1568.         return 0;

  1569. 

  1570.     c = *(AVClass**)src;

  1571.     if (*(AVClass**)dst && c != *(AVClass**)dst)

  1572.         return AVERROR(EINVAL);

  1573. 

  1574.     while ((o = av_opt_next(src, o))) {

  1575.         void *field_dst = ((uint8_t*)dst) + o->offset;

  1576.         void *field_src = ((uint8_t*)src) + o->offset;

  1577.         uint8_t **field_dst8 = (uint8_t**)field_dst;

  1578.         uint8_t **field_src8 = (uint8_t**)field_src;

  1579. 

  1580.         if (o->type == AV_OPT_TYPE_STRING) {

  1581.             if (*field_dst8 != *field_src8)

  1582.                 av_freep(field_dst8);

  1583.             *field_dst8 = av_strdup(*field_src8);

  1584.             if (*field_src8 && !*field_dst8)

  1585.                 ret = AVERROR(ENOMEM);

  1586.         } else if (o->type == AV_OPT_TYPE_BINARY) {

  1587.             int len = *(int*)(field_src8 + 1);

  1588.             if (*field_dst8 != *field_src8)

  1589.                 av_freep(field_dst8);

  1590.             *field_dst8 = av_memdup(*field_src8, len);

  1591.             if (len && !*field_dst8) {

  1592.                 ret = AVERROR(ENOMEM);

  1593.                 len = 0;

  1594.             }

  1595.             *(int*)(field_dst8 + 1) = len;

  1596.         } else if (o->type == AV_OPT_TYPE_CONST) {

  1597.             // do nothing

  1598.         } else {

  1599.             memcpy(field_dst, field_src, opt_size(o->type));

  1600.         }

  1601.     }

  1602.     return ret;

  1603. }

  1604. 

  1605. int av_opt_query_ranges(AVOptionRanges **ranges_arg, void *obj, const char *key, int flags)

  1606. {

  1607.     int ret;

  1608.     const AVClass *c = *(AVClass**)obj;

  1609.     int (*callback)(AVOptionRanges **, void *obj, const char *key, int flags) = NULL;

  1610. 

  1611.     if (c->version > (52 << 16 | 11 << 8))

  1612.         callback = c->query_ranges;

  1613. 

  1614.     if (!callback)

  1615.         callback = av_opt_query_ranges_default;

  1616. 

  1617.     ret = callback(ranges_arg, obj, key, flags);

  1618.     if (ret >= 0) {

  1619.         if (!(flags & AV_OPT_MULTI_COMPONENT_RANGE))

  1620.             ret = 1;

  1621.         (*ranges_arg)->nb_components = ret;

  1622.     }

  1623.     return ret;

  1624. }

  1625. 

  1626. int av_opt_query_ranges_default(AVOptionRanges **ranges_arg, void *obj, const char *key, int flags)

  1627. {

  1628.     AVOptionRanges *ranges = av_mallocz(sizeof(*ranges));

  1629.     AVOptionRange **range_array = av_mallocz(sizeof(void*));

  1630.     AVOptionRange *range = av_mallocz(sizeof(*range));

  1631.     const AVOption *field = av_opt_find(obj, key, NULL, 0, flags);

  1632.     int ret;

  1633. 

  1634.     *ranges_arg = NULL;

  1635. 

  1636.     if (!ranges || !range || !range_array || !field) {

  1637.         ret = AVERROR(ENOMEM);

  1638.         goto fail;

  1639.     }

  1640. 

  1641.     ranges->range = range_array;

  1642.     ranges->range[0] = range;

  1643.     ranges->nb_ranges = 1;

  1644.     ranges->nb_components = 1;

  1645.     range->is_range = 1;

  1646.     range->value_min = field->min;

  1647.     range->value_max = field->max;

  1648. 

  1649.     switch (field->type) {

  1650.     case AV_OPT_TYPE_INT:

  1651.     case AV_OPT_TYPE_INT64:

  1652.     case AV_OPT_TYPE_PIXEL_FMT:

  1653.     case AV_OPT_TYPE_SAMPLE_FMT:

  1654.     case AV_OPT_TYPE_FLOAT:

  1655.     case AV_OPT_TYPE_DOUBLE:

  1656.     case AV_OPT_TYPE_DURATION:

  1657.     case AV_OPT_TYPE_COLOR:

  1658.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1659.         break;

  1660.     case AV_OPT_TYPE_STRING:

  1661.         range->component_min = 0;

  1662.         range->component_max = 0x10FFFF; // max unicode value

  1663.         range->value_min = -1;

  1664.         range->value_max = INT_MAX;

  1665.         break;

  1666.     case AV_OPT_TYPE_RATIONAL:

  1667.         range->component_min = INT_MIN;

  1668.         range->component_max = INT_MAX;

  1669.         break;

  1670.     case AV_OPT_TYPE_IMAGE_SIZE:

  1671.         range->component_min = 0;

  1672.         range->component_max = INT_MAX/128/8;

  1673.         range->value_min = 0;

  1674.         range->value_max = INT_MAX/8;

  1675.         break;

  1676.     case AV_OPT_TYPE_VIDEO_RATE:

  1677.         range->component_min = 1;

  1678.         range->component_max = INT_MAX;

  1679.         range->value_min = 1;

  1680.         range->value_max = INT_MAX;

  1681.         break;

  1682.     default:

  1683.         ret = AVERROR(ENOSYS);

  1684.         goto fail;

  1685.     }

  1686. 

  1687.     *ranges_arg = ranges;

  1688.     return 1;

  1689. fail:

  1690.     av_free(ranges);

  1691.     av_free(range);

  1692.     av_free(range_array);

  1693.     return ret;

  1694. }

  1695. 

  1696. void av_opt_freep_ranges(AVOptionRanges **rangesp)

  1697. {

  1698.     int i;

  1699.     AVOptionRanges *ranges = *rangesp;

  1700. 

  1701.     if (!ranges)

  1702.         return;

  1703. 

  1704.     for (i = 0; i < ranges->nb_ranges * ranges->nb_components; i++) {

  1705.         AVOptionRange *range = ranges->range[i];

  1706.         if (range) {

  1707.             av_freep(&range->str);

  1708.             av_freep(&ranges->range[i]);

  1709.         }

  1710.     }

  1711.     av_freep(&ranges->range);

  1712.     av_freep(rangesp);

  1713. }

  1714. 

  1715. #ifdef TEST

  1716. 

  1717. typedef struct TestContext

  1718. {

  1719.     const AVClass *class;

  1720.     int num;

  1721.     int toggle;

  1722.     char *string;

  1723.     int flags;

  1724.     AVRational rational;

  1725.     AVRational video_rate;

  1726.     int w, h;

  1727.     enum AVPixelFormat pix_fmt;

  1728.     enum AVSampleFormat sample_fmt;

  1729.     int64_t duration;

  1730.     uint8_t color[4];

  1731.     int64_t channel_layout;

  1732. } TestContext;

  1733. 

  1734. #define OFFSET(x) offsetof(TestContext, x)

  1735. 

  1736. #define TEST_FLAG_COOL 01

  1737. #define TEST_FLAG_LAME 02

  1738. #define TEST_FLAG_MU   04

  1739. 

  1740. static const AVOption test_options[]= {

  1741. {"num",      "set num",        OFFSET(num),      AV_OPT_TYPE_INT,      {.i64 = 0},       0,        100                 },

  1742. {"toggle",   "set toggle",     OFFSET(toggle),   AV_OPT_TYPE_INT,      {.i64 = 0},       0,        1                   },

  1743. {"rational", "set rational",   OFFSET(rational), AV_OPT_TYPE_RATIONAL, {.dbl = 0},       0,        10                  },

  1744. {"string",   "set string",     OFFSET(string),   AV_OPT_TYPE_STRING,   {.str = "default"}, CHAR_MIN, CHAR_MAX          },

  1745. {"flags",    "set flags",      OFFSET(flags),    AV_OPT_TYPE_FLAGS,    {.i64 = 0},       0,        INT_MAX, 0, "flags" },

  1746. {"cool",     "set cool flag ", 0,                AV_OPT_TYPE_CONST,    {.i64 = TEST_FLAG_COOL}, INT_MIN,  INT_MAX, 0, "flags" },

  1747. {"lame",     "set lame flag ", 0,                AV_OPT_TYPE_CONST,    {.i64 = TEST_FLAG_LAME}, INT_MIN,  INT_MAX, 0, "flags" },

  1748. {"mu",       "set mu flag ",   0,                AV_OPT_TYPE_CONST,    {.i64 = TEST_FLAG_MU},   INT_MIN,  INT_MAX, 0, "flags" },

  1749. {"size",     "set size",       OFFSET(w),        AV_OPT_TYPE_IMAGE_SIZE,{0},             0,        0                   },

  1750. {"pix_fmt",  "set pixfmt",     OFFSET(pix_fmt),  AV_OPT_TYPE_PIXEL_FMT, {.i64 = AV_PIX_FMT_NONE}, -1, INT_MAX},

  1751. {"sample_fmt", "set samplefmt", OFFSET(sample_fmt), AV_OPT_TYPE_SAMPLE_FMT, {.i64 = AV_SAMPLE_FMT_NONE}, -1, INT_MAX},

  1752. {"video_rate", "set videorate", OFFSET(video_rate), AV_OPT_TYPE_VIDEO_RATE,  {.str = "25"}, 0,     0                   },

  1753. {"duration", "set duration",   OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, INT64_MAX},

  1754. {"color", "set color",   OFFSET(color), AV_OPT_TYPE_COLOR, {.str = "pink"}, 0, 0},

  1755. {"cl", "set channel layout", OFFSET(channel_layout), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64 = AV_CH_LAYOUT_HEXAGONAL}, 0, INT64_MAX},

  1756. {NULL},

  1757. };

  1758. 

  1759. static const char *test_get_name(void *ctx)

  1760. {

  1761.     return "test";

  1762. }

  1763. 

  1764. static const AVClass test_class = {

  1765.     "TestContext",

  1766.     test_get_name,

  1767.     test_options

  1768. };

  1769. 

  1770. int main(void)

  1771. {

  1772.     int i;

  1773. 

  1774.     printf("\nTesting av_set_options_string()\n");

  1775.     {

  1776.         TestContext test_ctx = { 0 };

  1777.         static const char * const options[] = {

  1778.             "",

  1779.             ":",

  1780.             "=",

  1781.             "foo=:",

  1782.             ":=foo",

  1783.             "=foo",

  1784.             "foo=",

  1785.             "foo",

  1786.             "foo=val",

  1787.             "foo==val",

  1788.             "toggle=:",

  1789.             "string=:",

  1790.             "toggle=1 : foo",

  1791.             "toggle=100",

  1792.             "toggle==1",

  1793.             "flags=+mu-lame : num=42: toggle=0",

  1794.             "num=42 : string=blahblah",

  1795.             "rational=0 : rational=1/2 : rational=1/-1",

  1796.             "rational=-1/0",

  1797.             "size=1024x768",

  1798.             "size=pal",

  1799.             "size=bogus",

  1800.             "pix_fmt=yuv420p",

  1801.             "pix_fmt=2",

  1802.             "pix_fmt=bogus",

  1803.             "sample_fmt=s16",

  1804.             "sample_fmt=2",

  1805.             "sample_fmt=bogus",

  1806.             "video_rate=pal",

  1807.             "video_rate=25",

  1808.             "video_rate=30000/1001",

  1809.             "video_rate=30/1.001",

  1810.             "video_rate=bogus",

  1811.             "duration=bogus",

  1812.             "duration=123.45",

  1813.             "duration=1\\:23\\:45.67",

  1814.             "color=blue",

  1815.             "color=0x223300",

  1816.             "color=0x42FF07AA",

  1817.             "cl=stereo+downmix",

  1818.             "cl=foo",

  1819.         };

  1820. 

  1821.         test_ctx.class = &test_class;

  1822.         av_opt_set_defaults(&test_ctx);

  1823. 

  1824.         av_log_set_level(AV_LOG_DEBUG);

  1825. 

  1826.         for (i=0; i < FF_ARRAY_ELEMS(options); i++) {

  1827.             av_log(&test_ctx, AV_LOG_DEBUG, "Setting options string '%s'\n", options[i]);

  1828.             if (av_set_options_string(&test_ctx, options[i], "=", ":") < 0)

  1829.                 av_log(&test_ctx, AV_LOG_ERROR, "Error setting options string: '%s'\n", options[i]);

  1830.             printf("\n");

  1831.         }

  1832.         av_opt_free(&test_ctx);

  1833.     }

  1834. 

  1835.     printf("\nTesting av_opt_set_from_string()\n");

  1836.     {

  1837.         TestContext test_ctx = { 0 };

  1838.         static const char * const options[] = {

  1839.             "",

  1840.             "5",

  1841.             "5:hello",

  1842.             "5:hello:size=pal",

  1843.             "5:size=pal:hello",

  1844.             ":",

  1845.             "=",

  1846.             " 5 : hello : size = pal ",

  1847.             "a_very_long_option_name_that_will_need_to_be_ellipsized_around_here=42"

  1848.         };

  1849.         static const char * const shorthand[] = { "num", "string", NULL };

  1850. 

  1851.         test_ctx.class = &test_class;

  1852.         av_opt_set_defaults(&test_ctx);

  1853. 

  1854.         av_log_set_level(AV_LOG_DEBUG);

  1855. 

  1856.         for (i=0; i < FF_ARRAY_ELEMS(options); i++) {

  1857.             av_log(&test_ctx, AV_LOG_DEBUG, "Setting options string '%s'\n", options[i]);

  1858.             if (av_opt_set_from_string(&test_ctx, options[i], shorthand, "=", ":") < 0)

  1859.                 av_log(&test_ctx, AV_LOG_ERROR, "Error setting options string: '%s'\n", options[i]);

  1860.             printf("\n");

  1861.         }

  1862.         av_opt_free(&test_ctx);

  1863.     }

  1864. 

  1865.     return 0;

  1866. }

  1867. 

  1868. #endif