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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 "avassert.h"

  30. #include "avstring.h"

  31. #include "channel_layout.h"

  32. #include "common.h"

  33. #include "dict.h"

  34. #include "eval.h"

  35. #include "log.h"

  36. #include "parseutils.h"

  37. #include "pixdesc.h"

  38. #include "mathematics.h"

  39. #include "opt.h"

  40. #include "samplefmt.h"

  41. #include "bprint.h"

  42. 

  43. #include <float.h>

  44. 

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

  46. {

  47.     const AVClass *class;

  48.     if (!obj)

  49.         return NULL;

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

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

  52.         return class->option;

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

  54.         return ++last;

  55.     return NULL;

  56. }

  57. 

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

  59. {

  60.     switch (o->type) {

  61.     case AV_OPT_TYPE_FLAGS:

  62.         *intnum = *(unsigned int*)dst;

  63.         return 0;

  64.     case AV_OPT_TYPE_PIXEL_FMT:

  65.         *intnum = *(enum AVPixelFormat *)dst;

  66.         return 0;

  67.     case AV_OPT_TYPE_SAMPLE_FMT:

  68.         *intnum = *(enum AVSampleFormat *)dst;

  69.         return 0;

  70.     case AV_OPT_TYPE_BOOL:

  71.     case AV_OPT_TYPE_INT:

  72.         *intnum = *(int *)dst;

  73.         return 0;

  74.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  75.     case AV_OPT_TYPE_DURATION:

  76.     case AV_OPT_TYPE_INT64:

  77.     case AV_OPT_TYPE_UINT64:

  78.         *intnum = *(int64_t *)dst;

  79.         return 0;

  80.     case AV_OPT_TYPE_FLOAT:

  81.         *num = *(float *)dst;

  82.         return 0;

  83.     case AV_OPT_TYPE_DOUBLE:

  84.         *num = *(double *)dst;

  85.         return 0;

  86.     case AV_OPT_TYPE_RATIONAL:

  87.         *intnum = ((AVRational *)dst)->num;

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

  89.         return 0;

  90.     case AV_OPT_TYPE_CONST:

  91.         *num = o->default_val.dbl;

  92.         return 0;

  93.     }

  94.     return AVERROR(EINVAL);

  95. }

  96. 

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

  98. {

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

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

  101.         num = den ? num * intnum / den : (num && intnum ? INFINITY : NAN);

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

  103.                num, o->name, o->min, o->max);

  104.         return AVERROR(ERANGE);

  105.     }

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

  107.         double d = num*intnum/den;

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

  109.             av_log(obj, AV_LOG_ERROR,

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

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

  112.             return AVERROR(ERANGE);

  113.         }

  114.     }

  115. 

  116.     switch (o->type) {

  117.     case AV_OPT_TYPE_PIXEL_FMT:

  118.         *(enum AVPixelFormat *)dst = llrint(num / den) * intnum;

  119.         break;

  120.     case AV_OPT_TYPE_SAMPLE_FMT:

  121.         *(enum AVSampleFormat *)dst = llrint(num / den) * intnum;

  122.         break;

  123.     case AV_OPT_TYPE_BOOL:

  124.     case AV_OPT_TYPE_FLAGS:

  125.     case AV_OPT_TYPE_INT:

  126.         *(int *)dst = llrint(num / den) * intnum;

  127.         break;

  128.     case AV_OPT_TYPE_DURATION:

  129.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  130.     case AV_OPT_TYPE_INT64:{

  131.         double d = num / den;

  132.         if (intnum == 1 && d == (double)INT64_MAX) {

  133.             *(int64_t *)dst = INT64_MAX;

  134.         } else

  135.             *(int64_t *)dst = llrint(d) * intnum;

  136.         break;}

  137.     case AV_OPT_TYPE_UINT64:{

  138.         double d = num / den;

  139.         // We must special case uint64_t here as llrint() does not support values

  140.         // outside the int64_t range and there is no portable function which does

  141.         // "INT64_MAX + 1ULL" is used as it is representable exactly as IEEE double

  142.         // while INT64_MAX is not

  143.         if (intnum == 1 && d == (double)UINT64_MAX) {

  144.             *(uint64_t *)dst = UINT64_MAX;

  145.         } else if (d > INT64_MAX + 1ULL) {

  146.             *(uint64_t *)dst = (llrint(d - (INT64_MAX + 1ULL)) + (INT64_MAX + 1ULL))*intnum;

  147.         } else {

  148.             *(uint64_t *)dst = llrint(d) * intnum;

  149.         }

  150.         break;}

  151.     case AV_OPT_TYPE_FLOAT:

  152.         *(float *)dst = num * intnum / den;

  153.         break;

  154.     case AV_OPT_TYPE_DOUBLE:

  155.         *(double    *)dst = num * intnum / den;

  156.         break;

  157.     case AV_OPT_TYPE_RATIONAL:

  158.     case AV_OPT_TYPE_VIDEO_RATE:

  159.         if ((int) num == num)

  160.             *(AVRational *)dst = (AVRational) { num *intnum, den };

  161.         else

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

  163.         break;

  164.     default:

  165.         return AVERROR(EINVAL);

  166.     }

  167.     return 0;

  168. }

  169. 

  170. static int hexchar2int(char c) {

  171.     if (c >= '0' && c <= '9')

  172.         return c - '0';

  173.     if (c >= 'a' && c <= 'f')

  174.         return c - 'a' + 10;

  175.     if (c >= 'A' && c <= 'F')

  176.         return c - 'A' + 10;

  177.     return -1;

  178. }

  179. 

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

  181. {

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

  183.     uint8_t *bin, *ptr;

  184.     int len;

  185. 

  186.     av_freep(dst);

  187.     *lendst = 0;

  188. 

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

  190.         return 0;

  191. 

  192.     if (len & 1)

  193.         return AVERROR(EINVAL);

  194.     len /= 2;

  195. 

  196.     ptr = bin = av_malloc(len);

  197.     if (!ptr)

  198.         return AVERROR(ENOMEM);

  199.     while (*val) {

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

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

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

  203.             av_free(bin);

  204.             return AVERROR(EINVAL);

  205.         }

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

  207.     }

  208.     *dst    = bin;

  209.     *lendst = len;

  210. 

  211.     return 0;

  212. }

  213. 

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

  215. {

  216.     av_freep(dst);

  217.     *dst = av_strdup(val);

  218.     return *dst ? 0 : AVERROR(ENOMEM);

  219. }

  220. 

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

  222.                               opt->type == AV_OPT_TYPE_UINT64 || \

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

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

  225.                               opt->type == AV_OPT_TYPE_INT)     \

  226.                              ? opt->default_val.i64             \

  227.                              : opt->default_val.dbl)

  228. 

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

  230. {

  231.     int ret = 0;

  232.     int num, den;

  233.     char c;

  234. 

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

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

  237.             return ret;

  238.         ret = 0;

  239.     }

  240. 

  241.     for (;;) {

  242.         int i = 0;

  243.         char buf[256];

  244.         int cmd = 0;

  245.         double d;

  246.         int64_t intnum = 1;

  247. 

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

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

  250.                 cmd = *(val++);

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

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

  253.             buf[i] = 0;

  254.         }

  255. 

  256.         {

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

  258.             int res;

  259.             int ci = 0;

  260.             double const_values[64];

  261.             const char * const_names[64];

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

  263.                 d = DEFAULT_NUMVAL(o_named);

  264.             else {

  265.                 if (o->unit) {

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

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

  268.                             o_named->unit &&

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

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

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

  272.                                 return AVERROR_PATCHWELCOME;

  273.                             }

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

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

  276.                         }

  277.                     }

  278.                 }

  279.                 const_names [ci  ] = "default";

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

  281.                 const_names [ci  ] = "max";

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

  283.                 const_names [ci  ] = "min";

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

  285.                 const_names [ci  ] = "none";

  286.                 const_values[ci++] = 0;

  287.                 const_names [ci  ] = "all";

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

  289.                 const_names [ci] = NULL;

  290.                 const_values[ci] = 0;

  291. 

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

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

  294.                 if (res < 0) {

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

  296.                     return res;

  297.                 }

  298.             }

  299.         }

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

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

  302.             if (cmd == '+')

  303.                 d = intnum | (int64_t)d;

  304.             else if (cmd == '-')

  305.                 d = intnum &~(int64_t)d;

  306.         }

  307. 

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

  309.             return ret;

  310.         val += i;

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

  312.             return 0;

  313.     }

  314. }

  315. 

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

  317. {

  318.     int ret;

  319. 

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

  321.         dst[0] =

  322.         dst[1] = 0;

  323.         return 0;

  324.     }

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

  326.     if (ret < 0)

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

  328.     return ret;

  329. }

  330. 

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

  332. {

  333.     int ret;

  334.     if (!val) {

  335.         ret = AVERROR(EINVAL);

  336.     } else {

  337.         ret = av_parse_video_rate(dst, val);

  338.     }

  339.     if (ret < 0)

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

  341.     return ret;

  342. }

  343. 

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

  345. {

  346.     int ret;

  347. 

  348.     if (!val) {

  349.         return 0;

  350.     } else {

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

  352.         if (ret < 0)

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

  354.         return ret;

  355.     }

  356.     return 0;

  357. }

  358. 

  359. static const char *get_bool_name(int val)

  360. {

  361.     if (val < 0)

  362.         return "auto";

  363.     return val ? "true" : "false";

  364. }

  365. 

  366. static int set_string_bool(void *obj, const AVOption *o, const char *val, int *dst)

  367. {

  368.     int n;

  369. 

  370.     if (!val)

  371.         return 0;

  372. 

  373.     if (!strcmp(val, "auto")) {

  374.         n = -1;

  375.     } else if (av_match_name(val, "true,y,yes,enable,enabled,on")) {

  376.         n = 1;

  377.     } else if (av_match_name(val, "false,n,no,disable,disabled,off")) {

  378.         n = 0;

  379.     } else {

  380.         char *end = NULL;

  381.         n = strtol(val, &end, 10);

  382.         if (val + strlen(val) != end)

  383.             goto fail;

  384.     }

  385. 

  386.     if (n < o->min || n > o->max)

  387.         goto fail;

  388. 

  389.     *dst = n;

  390.     return 0;

  391. 

  392. fail:

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

  394.     return AVERROR(EINVAL);

  395. }

  396. 

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

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

  399. {

  400.     int fmt, min, max;

  401. 

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

  403.         fmt = -1;

  404.     } else {

  405.         fmt = get_fmt(val);

  406.         if (fmt == -1) {

  407.             char *tail;

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

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

  410.                 av_log(obj, AV_LOG_ERROR,

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

  412.                 return AVERROR(EINVAL);

  413.             }

  414.         }

  415.     }

  416. 

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

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

  419. 

  420.     // hack for compatibility with old ffmpeg

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

  422.         min = -1;

  423.         max = fmt_nb-1;

  424.     }

  425. 

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

  427.         av_log(obj, AV_LOG_ERROR,

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

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

  430.         return AVERROR(ERANGE);

  431.     }

  432. 

  433.     *(int *)dst = fmt;

  434.     return 0;

  435. }

  436. 

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

  438. {

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

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

  441. }

  442. 

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

  444. {

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

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

  447. }

  448. 

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

  450. {

  451.     int ret = 0;

  452.     void *dst, *target_obj;

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

  454.     if (!o || !target_obj)

  455.         return AVERROR_OPTION_NOT_FOUND;

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

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

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

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

  460.                  o->type != AV_OPT_TYPE_CHANNEL_LAYOUT && o->type != AV_OPT_TYPE_BOOL))

  461.         return AVERROR(EINVAL);

  462. 

  463.     if (o->flags & AV_OPT_FLAG_READONLY)

  464.         return AVERROR(EINVAL);

  465. 

  466.     if (o->flags & AV_OPT_FLAG_DEPRECATED)

  467.         av_log(obj, AV_LOG_WARNING, "The \"%s\" option is deprecated: %s\n", name, o->help);

  468. 

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

  470.     switch (o->type) {

  471.     case AV_OPT_TYPE_BOOL:

  472.         return set_string_bool(obj, o, val, dst);

  473.     case AV_OPT_TYPE_STRING:

  474.         return set_string(obj, o, val, dst);

  475.     case AV_OPT_TYPE_BINARY:

  476.         return set_string_binary(obj, o, val, dst);

  477.     case AV_OPT_TYPE_FLAGS:

  478.     case AV_OPT_TYPE_INT:

  479.     case AV_OPT_TYPE_INT64:

  480.     case AV_OPT_TYPE_UINT64:

  481.     case AV_OPT_TYPE_FLOAT:

  482.     case AV_OPT_TYPE_DOUBLE:

  483.     case AV_OPT_TYPE_RATIONAL:

  484.         return set_string_number(obj, target_obj, o, val, dst);

  485.     case AV_OPT_TYPE_IMAGE_SIZE:

  486.         return set_string_image_size(obj, o, val, dst);

  487.     case AV_OPT_TYPE_VIDEO_RATE: {

  488.         AVRational tmp;

  489.         ret = set_string_video_rate(obj, o, val, &tmp);

  490.         if (ret < 0)

  491.             return ret;

  492.         return write_number(obj, o, dst, 1, tmp.den, tmp.num);

  493.     }

  494.     case AV_OPT_TYPE_PIXEL_FMT:

  495.         return set_string_pixel_fmt(obj, o, val, dst);

  496.     case AV_OPT_TYPE_SAMPLE_FMT:

  497.         return set_string_sample_fmt(obj, o, val, dst);

  498.     case AV_OPT_TYPE_DURATION:

  499.         {

  500.             int64_t usecs = 0;

  501.             if (val) {

  502.                 if ((ret = av_parse_time(&usecs, val, 1)) < 0) {

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

  504.                     return ret;

  505.                 }

  506.             }

  507.             if (usecs < o->min || usecs > o->max) {

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

  509.                        usecs / 1000000.0, o->name, o->min / 1000000.0, o->max / 1000000.0);

  510.                 return AVERROR(ERANGE);

  511.             }

  512.             *(int64_t *)dst = usecs;

  513.             return 0;

  514.         }

  515.     case AV_OPT_TYPE_COLOR:

  516.         return set_string_color(obj, o, val, dst);

  517.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

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

  519.             *(int64_t *)dst = 0;

  520.         } else {

  521.             int64_t cl = av_get_channel_layout(val);

  522.             if (!cl) {

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

  524.                 ret = AVERROR(EINVAL);

  525.             }

  526.             *(int64_t *)dst = cl;

  527.             return ret;

  528.         }

  529.         break;

  530.     }

  531. 

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

  533.     return AVERROR(EINVAL);

  534. }

  535. 

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

  537. int av_opt_eval_ ## name(void *obj, const AVOption *o,                  \

  538.                          const char *val, vartype *name ## _out)        \

  539. {                                                                       \

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

  541.         return AVERROR(EINVAL);                                         \

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

  543. }

  544. 

  545. OPT_EVAL_NUMBER(flags,  AV_OPT_TYPE_FLAGS,    int)

  546. OPT_EVAL_NUMBER(int,    AV_OPT_TYPE_INT,      int)

  547. OPT_EVAL_NUMBER(int64,  AV_OPT_TYPE_INT64,    int64_t)

  548. OPT_EVAL_NUMBER(float,  AV_OPT_TYPE_FLOAT,    float)

  549. OPT_EVAL_NUMBER(double, AV_OPT_TYPE_DOUBLE,   double)

  550. OPT_EVAL_NUMBER(q,      AV_OPT_TYPE_RATIONAL, AVRational)

  551. 

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

  553.                       int search_flags)

  554. {

  555.     void *dst, *target_obj;

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

  557. 

  558.     if (!o || !target_obj)

  559.         return AVERROR_OPTION_NOT_FOUND;

  560. 

  561.     if (o->flags & AV_OPT_FLAG_READONLY)

  562.         return AVERROR(EINVAL);

  563. 

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

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

  566. }

  567. 

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

  569. {

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

  571. }

  572. 

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

  574. {

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

  576. }

  577. 

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

  579. {

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

  581. }

  582. 

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

  584. {

  585.     void *target_obj;

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

  587.     uint8_t *ptr;

  588.     uint8_t **dst;

  589.     int *lendst;

  590. 

  591.     if (!o || !target_obj)

  592.         return AVERROR_OPTION_NOT_FOUND;

  593. 

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

  595.         return AVERROR(EINVAL);

  596. 

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

  598.     if (len && !ptr)

  599.         return AVERROR(ENOMEM);

  600. 

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

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

  603. 

  604.     av_free(*dst);

  605.     *dst    = ptr;

  606.     *lendst = len;

  607.     if (len)

  608.         memcpy(ptr, val, len);

  609. 

  610.     return 0;

  611. }

  612. 

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

  614. {

  615.     void *target_obj;

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

  617. 

  618.     if (!o || !target_obj)

  619.         return AVERROR_OPTION_NOT_FOUND;

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

  621.         av_log(obj, AV_LOG_ERROR,

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

  623.         return AVERROR(EINVAL);

  624.     }

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

  626.         av_log(obj, AV_LOG_ERROR,

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

  628.         return AVERROR(EINVAL);

  629.     }

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

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

  632.     return 0;

  633. }

  634. 

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

  636. {

  637.     void *target_obj;

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

  639. 

  640.     if (!o || !target_obj)

  641.         return AVERROR_OPTION_NOT_FOUND;

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

  643.         av_log(obj, AV_LOG_ERROR,

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

  645.         return AVERROR(EINVAL);

  646.     }

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

  648.         return AVERROR(EINVAL);

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

  650. }

  651. 

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

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

  654. {

  655.     void *target_obj;

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

  657.                                      search_flags, &target_obj);

  658.     int min, max;

  659. 

  660.     if (!o || !target_obj)

  661.         return AVERROR_OPTION_NOT_FOUND;

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

  663.         av_log(obj, AV_LOG_ERROR,

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

  665.         return AVERROR(EINVAL);

  666.     }

  667. 

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

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

  670. 

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

  672.         av_log(obj, AV_LOG_ERROR,

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

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

  675.         return AVERROR(ERANGE);

  676.     }

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

  678.     return 0;

  679. }

  680. 

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

  682. {

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

  684. }

  685. 

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

  687. {

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

  689. }

  690. 

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

  692. {

  693.     void *target_obj;

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

  695. 

  696.     if (!o || !target_obj)

  697.         return AVERROR_OPTION_NOT_FOUND;

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

  699.         av_log(obj, AV_LOG_ERROR,

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

  701.         return AVERROR(EINVAL);

  702.     }

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

  704.     return 0;

  705. }

  706. 

  707. int av_opt_set_dict_val(void *obj, const char *name, const AVDictionary *val,

  708.                         int search_flags)

  709. {

  710.     void *target_obj;

  711.     AVDictionary **dst;

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

  713. 

  714.     if (!o || !target_obj)

  715.         return AVERROR_OPTION_NOT_FOUND;

  716.     if (o->flags & AV_OPT_FLAG_READONLY)

  717.         return AVERROR(EINVAL);

  718. 

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

  720.     av_dict_free(dst);

  721.     av_dict_copy(dst, val, 0);

  722. 

  723.     return 0;

  724. }

  725. 

  726. static void format_duration(char *buf, size_t size, int64_t d)

  727. {

  728.     char *e;

  729. 

  730.     av_assert0(size >= 25);

  731.     if (d < 0 && d != INT64_MIN) {

  732.         *(buf++) = '-';

  733.         size--;

  734.         d = -d;

  735.     }

  736.     if (d == INT64_MAX)

  737.         snprintf(buf, size, "INT64_MAX");

  738.     else if (d == INT64_MIN)

  739.         snprintf(buf, size, "INT64_MIN");

  740.     else if (d > (int64_t)3600*1000000)

  741.         snprintf(buf, size, "%"PRId64":%02d:%02d.%06d", d / 3600000000,

  742.                  (int)((d / 60000000) % 60),

  743.                  (int)((d / 1000000) % 60),

  744.                  (int)(d % 1000000));

  745.     else if (d > 60*1000000)

  746.         snprintf(buf, size, "%d:%02d.%06d",

  747.                  (int)(d / 60000000),

  748.                  (int)((d / 1000000) % 60),

  749.                  (int)(d % 1000000));

  750.     else

  751.         snprintf(buf, size, "%d.%06d",

  752.                  (int)(d / 1000000),

  753.                  (int)(d % 1000000));

  754.     e = buf + strlen(buf);

  755.     while (e > buf && e[-1] == '0')

  756.         *(--e) = 0;

  757.     if (e > buf && e[-1] == '.')

  758.         *(--e) = 0;

  759. }

  760. 

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

  762. {

  763.     void *dst, *target_obj;

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

  765.     uint8_t *bin, buf[128];

  766.     int len, i, ret;

  767.     int64_t i64;

  768. 

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

  770.         return AVERROR_OPTION_NOT_FOUND;

  771. 

  772.     if (o->flags & AV_OPT_FLAG_DEPRECATED)

  773.         av_log(obj, AV_LOG_WARNING, "The \"%s\" option is deprecated: %s\n", name, o->help);

  774. 

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

  776. 

  777.     buf[0] = 0;

  778.     switch (o->type) {

  779.     case AV_OPT_TYPE_BOOL:

  780.         ret = snprintf(buf, sizeof(buf), "%s", (char *)av_x_if_null(get_bool_name(*(int *)dst), "invalid"));

  781.         break;

  782.     case AV_OPT_TYPE_FLAGS:

  783.         ret = snprintf(buf, sizeof(buf), "0x%08X", *(int *)dst);

  784.         break;

  785.     case AV_OPT_TYPE_INT:

  786.         ret = snprintf(buf, sizeof(buf), "%d", *(int *)dst);

  787.         break;

  788.     case AV_OPT_TYPE_INT64:

  789.         ret = snprintf(buf, sizeof(buf), "%"PRId64, *(int64_t *)dst);

  790.         break;

  791.     case AV_OPT_TYPE_UINT64:

  792.         ret = snprintf(buf, sizeof(buf), "%"PRIu64, *(uint64_t *)dst);

  793.         break;

  794.     case AV_OPT_TYPE_FLOAT:

  795.         ret = snprintf(buf, sizeof(buf), "%f", *(float *)dst);

  796.         break;

  797.     case AV_OPT_TYPE_DOUBLE:

  798.         ret = snprintf(buf, sizeof(buf), "%f", *(double *)dst);

  799.         break;

  800.     case AV_OPT_TYPE_VIDEO_RATE:

  801.     case AV_OPT_TYPE_RATIONAL:

  802.         ret = snprintf(buf, sizeof(buf), "%d/%d", ((AVRational *)dst)->num, ((AVRational *)dst)->den);

  803.         break;

  804.     case AV_OPT_TYPE_CONST:

  805.         ret = snprintf(buf, sizeof(buf), "%f", o->default_val.dbl);

  806.         break;

  807.     case AV_OPT_TYPE_STRING:

  808.         if (*(uint8_t **)dst) {

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

  810.         } else if (search_flags & AV_OPT_ALLOW_NULL) {

  811.             *out_val = NULL;

  812.             return 0;

  813.         } else {

  814.             *out_val = av_strdup("");

  815.         }

  816.         return *out_val ? 0 : AVERROR(ENOMEM);

  817.     case AV_OPT_TYPE_BINARY:

  818.         if (!*(uint8_t **)dst && (search_flags & AV_OPT_ALLOW_NULL)) {

  819.             *out_val = NULL;

  820.             return 0;

  821.         }

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

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

  824.             return AVERROR(EINVAL);

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

  826.             return AVERROR(ENOMEM);

  827.         if (!len) {

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

  829.             return 0;

  830.         }

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

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

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

  834.         return 0;

  835.     case AV_OPT_TYPE_IMAGE_SIZE:

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

  837.         break;

  838.     case AV_OPT_TYPE_PIXEL_FMT:

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

  840.         break;

  841.     case AV_OPT_TYPE_SAMPLE_FMT:

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

  843.         break;

  844.     case AV_OPT_TYPE_DURATION:

  845.         i64 = *(int64_t *)dst;

  846.         format_duration(buf, sizeof(buf), i64);

  847.         ret = strlen(buf); // no overflow possible, checked by an assert

  848.         break;

  849.     case AV_OPT_TYPE_COLOR:

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

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

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

  853.         break;

  854.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  855.         i64 = *(int64_t *)dst;

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

  857.         break;

  858.     default:

  859.         return AVERROR(EINVAL);

  860.     }

  861. 

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

  863.         return AVERROR(EINVAL);

  864.     *out_val = av_strdup(buf);

  865.     return *out_val ? 0 : AVERROR(ENOMEM);

  866. }

  867. 

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

  869.                       int search_flags)

  870. {

  871.     void *dst, *target_obj;

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

  873.     if (!o || !target_obj)

  874.         goto error;

  875. 

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

  877. 

  878.     if (o_out) *o_out= o;

  879. 

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

  881. 

  882. error:

  883.     *den    =

  884.     *intnum = 0;

  885.     return -1;

  886. }

  887. 

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

  889. {

  890.     int64_t intnum = 1;

  891.     double num = 1;

  892.     int ret, den = 1;

  893. 

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

  895.         return ret;

  896.     *out_val = num * intnum / den;

  897.     return 0;

  898. }

  899. 

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

  901. {

  902.     int64_t intnum = 1;

  903.     double num = 1;

  904.     int ret, den = 1;

  905. 

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

  907.         return ret;

  908.     *out_val = num * intnum / den;

  909.     return 0;

  910. }

  911. 

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

  913. {

  914.     int64_t intnum = 1;

  915.     double num = 1;

  916.     int ret, den = 1;

  917. 

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

  919.         return ret;

  920. 

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

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

  923.     else

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

  925.     return 0;

  926. }

  927. 

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

  929. {

  930.     void *dst, *target_obj;

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

  932.     if (!o || !target_obj)

  933.         return AVERROR_OPTION_NOT_FOUND;

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

  935.         av_log(obj, AV_LOG_ERROR,

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

  937.         return AVERROR(EINVAL);

  938.     }

  939. 

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

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

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

  943.     return 0;

  944. }

  945. 

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

  947. {

  948.     int64_t intnum = 1;

  949.     double     num = 1;

  950.     int   ret, den = 1;

  951. 

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

  953.         return ret;

  954. 

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

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

  957.     else

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

  959.     return 0;

  960. }

  961. 

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

  963.                       enum AVOptionType type, const char *desc)

  964. {

  965.     void *dst, *target_obj;

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

  967.     if (!o || !target_obj)

  968.         return AVERROR_OPTION_NOT_FOUND;

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

  970.         av_log(obj, AV_LOG_ERROR,

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

  972.         return AVERROR(EINVAL);

  973.     }

  974. 

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

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

  977.     return 0;

  978. }

  979. 

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

  981. {

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

  983. }

  984. 

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

  986. {

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

  988. }

  989. 

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

  991. {

  992.     void *dst, *target_obj;

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

  994.     if (!o || !target_obj)

  995.         return AVERROR_OPTION_NOT_FOUND;

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

  997.         av_log(obj, AV_LOG_ERROR,

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

  999.         return AVERROR(EINVAL);

  1000.     }

  1001. 

  1002.     dst = ((uint8_t*)target_obj) + o->offset;

  1003.     *cl = *(int64_t *)dst;

  1004.     return 0;

  1005. }

  1006. 

  1007. int av_opt_get_dict_val(void *obj, const char *name, int search_flags, AVDictionary **out_val)

  1008. {

  1009.     void *target_obj;

  1010.     AVDictionary *src;

  1011.     const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);

  1012. 

  1013.     if (!o || !target_obj)

  1014.         return AVERROR_OPTION_NOT_FOUND;

  1015.     if (o->type != AV_OPT_TYPE_DICT)

  1016.         return AVERROR(EINVAL);

  1017. 

  1018.     src = *(AVDictionary **)(((uint8_t *)target_obj) + o->offset);

  1019.     av_dict_copy(out_val, src, 0);

  1020. 

  1021.     return 0;

  1022. }

  1023. 

  1024. int av_opt_flag_is_set(void *obj, const char *field_name, const char *flag_name)

  1025. {

  1026.     const AVOption *field = av_opt_find(obj, field_name, NULL, 0, 0);

  1027.     const AVOption *flag  = av_opt_find(obj, flag_name,

  1028.                                         field ? field->unit : NULL, 0, 0);

  1029.     int64_t res;

  1030. 

  1031.     if (!field || !flag || flag->type != AV_OPT_TYPE_CONST ||

  1032.         av_opt_get_int(obj, field_name, 0, &res) < 0)

  1033.         return 0;

  1034.     return res & flag->default_val.i64;

  1035. }

  1036. 

  1037. static void log_int_value(void *av_log_obj, int level, int64_t i)

  1038. {

  1039.     if (i == INT_MAX) {

  1040.         av_log(av_log_obj, level, "INT_MAX");

  1041.     } else if (i == INT_MIN) {

  1042.         av_log(av_log_obj, level, "INT_MIN");

  1043.     } else if (i == UINT32_MAX) {

  1044.         av_log(av_log_obj, level, "UINT32_MAX");

  1045.     } else if (i == INT64_MAX) {

  1046.         av_log(av_log_obj, level, "I64_MAX");

  1047.     } else if (i == INT64_MIN) {

  1048.         av_log(av_log_obj, level, "I64_MIN");

  1049.     } else {

  1050.         av_log(av_log_obj, level, "%"PRId64, i);

  1051.     }

  1052. }

  1053. 

  1054. static void log_value(void *av_log_obj, int level, double d)

  1055. {

  1056.     if      (d == INT_MAX) {

  1057.         av_log(av_log_obj, level, "INT_MAX");

  1058.     } else if (d == INT_MIN) {

  1059.         av_log(av_log_obj, level, "INT_MIN");

  1060.     } else if (d == UINT32_MAX) {

  1061.         av_log(av_log_obj, level, "UINT32_MAX");

  1062.     } else if (d == (double)INT64_MAX) {

  1063.         av_log(av_log_obj, level, "I64_MAX");

  1064.     } else if (d == INT64_MIN) {

  1065.         av_log(av_log_obj, level, "I64_MIN");

  1066.     } else if (d == FLT_MAX) {

  1067.         av_log(av_log_obj, level, "FLT_MAX");

  1068.     } else if (d == FLT_MIN) {

  1069.         av_log(av_log_obj, level, "FLT_MIN");

  1070.     } else if (d == -FLT_MAX) {

  1071.         av_log(av_log_obj, level, "-FLT_MAX");

  1072.     } else if (d == -FLT_MIN) {

  1073.         av_log(av_log_obj, level, "-FLT_MIN");

  1074.     } else if (d == DBL_MAX) {

  1075.         av_log(av_log_obj, level, "DBL_MAX");

  1076.     } else if (d == DBL_MIN) {

  1077.         av_log(av_log_obj, level, "DBL_MIN");

  1078.     } else if (d == -DBL_MAX) {

  1079.         av_log(av_log_obj, level, "-DBL_MAX");

  1080.     } else if (d == -DBL_MIN) {

  1081.         av_log(av_log_obj, level, "-DBL_MIN");

  1082.     } else {

  1083.         av_log(av_log_obj, level, "%g", d);

  1084.     }

  1085. }

  1086. 

  1087. static const char *get_opt_const_name(void *obj, const char *unit, int64_t value)

  1088. {

  1089.     const AVOption *opt = NULL;

  1090. 

  1091.     if (!unit)

  1092.         return NULL;

  1093.     while ((opt = av_opt_next(obj, opt)))

  1094.         if (opt->type == AV_OPT_TYPE_CONST && !strcmp(opt->unit, unit) &&

  1095.             opt->default_val.i64 == value)

  1096.             return opt->name;

  1097.     return NULL;

  1098. }

  1099. 

  1100. static char *get_opt_flags_string(void *obj, const char *unit, int64_t value)

  1101. {

  1102.     const AVOption *opt = NULL;

  1103.     char flags[512];

  1104. 

  1105.     flags[0] = 0;

  1106.     if (!unit)

  1107.         return NULL;

  1108.     while ((opt = av_opt_next(obj, opt))) {

  1109.         if (opt->type == AV_OPT_TYPE_CONST && !strcmp(opt->unit, unit) &&

  1110.             opt->default_val.i64 & value) {

  1111.             if (flags[0])

  1112.                 av_strlcatf(flags, sizeof(flags), "+");

  1113.             av_strlcatf(flags, sizeof(flags), "%s", opt->name);

  1114.         }

  1115.     }

  1116.     if (flags[0])

  1117.         return av_strdup(flags);

  1118.     return NULL;

  1119. }

  1120. 

  1121. static void opt_list(void *obj, void *av_log_obj, const char *unit,

  1122.                      int req_flags, int rej_flags, enum AVOptionType parent_type)

  1123. {

  1124.     const AVOption *opt = NULL;

  1125.     AVOptionRanges *r;

  1126.     int i;

  1127. 

  1128.     while ((opt = av_opt_next(obj, opt))) {

  1129.         if (!(opt->flags & req_flags) || (opt->flags & rej_flags))

  1130.             continue;

  1131. 

  1132.         /* Don't print CONST's on level one.

  1133.          * Don't print anything but CONST's on level two.

  1134.          * Only print items from the requested unit.

  1135.          */

  1136.         if (!unit && opt->type == AV_OPT_TYPE_CONST)

  1137.             continue;

  1138.         else if (unit && opt->type != AV_OPT_TYPE_CONST)

  1139.             continue;

  1140.         else if (unit && opt->type == AV_OPT_TYPE_CONST && strcmp(unit, opt->unit))

  1141.             continue;

  1142.         else if (unit && opt->type == AV_OPT_TYPE_CONST)

  1143.             av_log(av_log_obj, AV_LOG_INFO, "     %-15s ", opt->name);

  1144.         else

  1145.             av_log(av_log_obj, AV_LOG_INFO, "  %s%-17s ",

  1146.                    (opt->flags & AV_OPT_FLAG_FILTERING_PARAM) ? "" : "-",

  1147.                    opt->name);

  1148. 

  1149.         switch (opt->type) {

  1150.             case AV_OPT_TYPE_FLAGS:

  1151.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<flags>");

  1152.                 break;

  1153.             case AV_OPT_TYPE_INT:

  1154.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<int>");

  1155.                 break;

  1156.             case AV_OPT_TYPE_INT64:

  1157.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<int64>");

  1158.                 break;

  1159.             case AV_OPT_TYPE_UINT64:

  1160.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<uint64>");

  1161.                 break;

  1162.             case AV_OPT_TYPE_DOUBLE:

  1163.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<double>");

  1164.                 break;

  1165.             case AV_OPT_TYPE_FLOAT:

  1166.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<float>");

  1167.                 break;

  1168.             case AV_OPT_TYPE_STRING:

  1169.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<string>");

  1170.                 break;

  1171.             case AV_OPT_TYPE_RATIONAL:

  1172.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<rational>");

  1173.                 break;

  1174.             case AV_OPT_TYPE_BINARY:

  1175.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<binary>");

  1176.                 break;

  1177.             case AV_OPT_TYPE_IMAGE_SIZE:

  1178.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<image_size>");

  1179.                 break;

  1180.             case AV_OPT_TYPE_VIDEO_RATE:

  1181.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<video_rate>");

  1182.                 break;

  1183.             case AV_OPT_TYPE_PIXEL_FMT:

  1184.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<pix_fmt>");

  1185.                 break;

  1186.             case AV_OPT_TYPE_SAMPLE_FMT:

  1187.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<sample_fmt>");

  1188.                 break;

  1189.             case AV_OPT_TYPE_DURATION:

  1190.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<duration>");

  1191.                 break;

  1192.             case AV_OPT_TYPE_COLOR:

  1193.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<color>");

  1194.                 break;

  1195.             case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1196.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<channel_layout>");

  1197.                 break;

  1198.             case AV_OPT_TYPE_BOOL:

  1199.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<boolean>");

  1200.                 break;

  1201.             case AV_OPT_TYPE_CONST:

  1202.                 if (parent_type == AV_OPT_TYPE_INT)

  1203.                     av_log(av_log_obj, AV_LOG_INFO, "%-12"PRId64" ", opt->default_val.i64);

  1204.                 else

  1205.                     av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "");

  1206.                 break;

  1207.             default:

  1208.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "");

  1209.                 break;

  1210.         }

  1211.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_ENCODING_PARAM) ? 'E' : '.');

  1212.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_DECODING_PARAM) ? 'D' : '.');

  1213.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_FILTERING_PARAM)? 'F' : '.');

  1214.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_VIDEO_PARAM   ) ? 'V' : '.');

  1215.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_AUDIO_PARAM   ) ? 'A' : '.');

  1216.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_SUBTITLE_PARAM) ? 'S' : '.');

  1217.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_EXPORT)         ? 'X' : '.');

  1218.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_READONLY)       ? 'R' : '.');

  1219.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_BSF_PARAM)      ? 'B' : '.');

  1220. 

  1221.         if (opt->help)

  1222.             av_log(av_log_obj, AV_LOG_INFO, " %s", opt->help);

  1223. 

  1224.         if (av_opt_query_ranges(&r, obj, opt->name, AV_OPT_SEARCH_FAKE_OBJ) >= 0) {

  1225.             switch (opt->type) {

  1226.             case AV_OPT_TYPE_INT:

  1227.             case AV_OPT_TYPE_INT64:

  1228.             case AV_OPT_TYPE_UINT64:

  1229.             case AV_OPT_TYPE_DOUBLE:

  1230.             case AV_OPT_TYPE_FLOAT:

  1231.             case AV_OPT_TYPE_RATIONAL:

  1232.                 for (i = 0; i < r->nb_ranges; i++) {

  1233.                     av_log(av_log_obj, AV_LOG_INFO, " (from ");

  1234.                     log_value(av_log_obj, AV_LOG_INFO, r->range[i]->value_min);

  1235.                     av_log(av_log_obj, AV_LOG_INFO, " to ");

  1236.                     log_value(av_log_obj, AV_LOG_INFO, r->range[i]->value_max);

  1237.                     av_log(av_log_obj, AV_LOG_INFO, ")");

  1238.                 }

  1239.                 break;

  1240.             }

  1241.             av_opt_freep_ranges(&r);

  1242.         }

  1243. 

  1244.         if (opt->type != AV_OPT_TYPE_CONST  &&

  1245.             opt->type != AV_OPT_TYPE_BINARY &&

  1246.                 !((opt->type == AV_OPT_TYPE_COLOR      ||

  1247.                    opt->type == AV_OPT_TYPE_IMAGE_SIZE ||

  1248.                    opt->type == AV_OPT_TYPE_STRING     ||

  1249.                    opt->type == AV_OPT_TYPE_VIDEO_RATE) &&

  1250.                   !opt->default_val.str)) {

  1251.             av_log(av_log_obj, AV_LOG_INFO, " (default ");

  1252.             switch (opt->type) {

  1253.             case AV_OPT_TYPE_BOOL:

  1254.                 av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(get_bool_name(opt->default_val.i64), "invalid"));

  1255.                 break;

  1256.             case AV_OPT_TYPE_FLAGS: {

  1257.                 char *def_flags = get_opt_flags_string(obj, opt->unit, opt->default_val.i64);

  1258.                 if (def_flags) {

  1259.                     av_log(av_log_obj, AV_LOG_INFO, "%s", def_flags);

  1260.                     av_freep(&def_flags);

  1261.                 } else {

  1262.                     av_log(av_log_obj, AV_LOG_INFO, "%"PRIX64, opt->default_val.i64);

  1263.                 }

  1264.                 break;

  1265.             }

  1266.             case AV_OPT_TYPE_DURATION: {

  1267.                 char buf[25];

  1268.                 format_duration(buf, sizeof(buf), opt->default_val.i64);

  1269.                 av_log(av_log_obj, AV_LOG_INFO, "%s", buf);

  1270.                 break;

  1271.             }

  1272.             case AV_OPT_TYPE_INT:

  1273.             case AV_OPT_TYPE_UINT64:

  1274.             case AV_OPT_TYPE_INT64: {

  1275.                 const char *def_const = get_opt_const_name(obj, opt->unit, opt->default_val.i64);

  1276.                 if (def_const)

  1277.                     av_log(av_log_obj, AV_LOG_INFO, "%s", def_const);

  1278.                 else

  1279.                     log_int_value(av_log_obj, AV_LOG_INFO, opt->default_val.i64);

  1280.                 break;

  1281.             }

  1282.             case AV_OPT_TYPE_DOUBLE:

  1283.             case AV_OPT_TYPE_FLOAT:

  1284.                 log_value(av_log_obj, AV_LOG_INFO, opt->default_val.dbl);

  1285.                 break;

  1286.             case AV_OPT_TYPE_RATIONAL: {

  1287.                 AVRational q = av_d2q(opt->default_val.dbl, INT_MAX);

  1288.                 av_log(av_log_obj, AV_LOG_INFO, "%d/%d", q.num, q.den); }

  1289.                 break;

  1290.             case AV_OPT_TYPE_PIXEL_FMT:

  1291.                 av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(av_get_pix_fmt_name(opt->default_val.i64), "none"));

  1292.                 break;

  1293.             case AV_OPT_TYPE_SAMPLE_FMT:

  1294.                 av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(av_get_sample_fmt_name(opt->default_val.i64), "none"));

  1295.                 break;

  1296.             case AV_OPT_TYPE_COLOR:

  1297.             case AV_OPT_TYPE_IMAGE_SIZE:

  1298.             case AV_OPT_TYPE_STRING:

  1299.             case AV_OPT_TYPE_VIDEO_RATE:

  1300.                 av_log(av_log_obj, AV_LOG_INFO, "\"%s\"", opt->default_val.str);

  1301.                 break;

  1302.             case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1303.                 av_log(av_log_obj, AV_LOG_INFO, "0x%"PRIx64, opt->default_val.i64);

  1304.                 break;

  1305.             }

  1306.             av_log(av_log_obj, AV_LOG_INFO, ")");

  1307.         }

  1308. 

  1309.         av_log(av_log_obj, AV_LOG_INFO, "\n");

  1310.         if (opt->unit && opt->type != AV_OPT_TYPE_CONST)

  1311.             opt_list(obj, av_log_obj, opt->unit, req_flags, rej_flags, opt->type);

  1312.     }

  1313. }

  1314. 

  1315. int av_opt_show2(void *obj, void *av_log_obj, int req_flags, int rej_flags)

  1316. {

  1317.     if (!obj)

  1318.         return -1;

  1319. 

  1320.     av_log(av_log_obj, AV_LOG_INFO, "%s AVOptions:\n", (*(AVClass **)obj)->class_name);

  1321. 

  1322.     opt_list(obj, av_log_obj, NULL, req_flags, rej_flags, -1);

  1323. 

  1324.     return 0;

  1325. }

  1326. 

  1327. void av_opt_set_defaults(void *s)

  1328. {

  1329.     av_opt_set_defaults2(s, 0, 0);

  1330. }

  1331. 

  1332. void av_opt_set_defaults2(void *s, int mask, int flags)

  1333. {

  1334.     const AVOption *opt = NULL;

  1335.     while ((opt = av_opt_next(s, opt))) {

  1336.         void *dst = ((uint8_t*)s) + opt->offset;

  1337. 

  1338.         if ((opt->flags & mask) != flags)

  1339.             continue;

  1340. 

  1341.         if (opt->flags & AV_OPT_FLAG_READONLY)

  1342.             continue;

  1343. 

  1344.         switch (opt->type) {

  1345.             case AV_OPT_TYPE_CONST:

  1346.                 /* Nothing to be done here */

  1347.                 break;

  1348.             case AV_OPT_TYPE_BOOL:

  1349.             case AV_OPT_TYPE_FLAGS:

  1350.             case AV_OPT_TYPE_INT:

  1351.             case AV_OPT_TYPE_INT64:

  1352.             case AV_OPT_TYPE_UINT64:

  1353.             case AV_OPT_TYPE_DURATION:

  1354.             case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1355.             case AV_OPT_TYPE_PIXEL_FMT:

  1356.             case AV_OPT_TYPE_SAMPLE_FMT:

  1357.                 write_number(s, opt, dst, 1, 1, opt->default_val.i64);

  1358.                 break;

  1359.             case AV_OPT_TYPE_DOUBLE:

  1360.             case AV_OPT_TYPE_FLOAT: {

  1361.                 double val;

  1362.                 val = opt->default_val.dbl;

  1363.                 write_number(s, opt, dst, val, 1, 1);

  1364.             }

  1365.             break;

  1366.             case AV_OPT_TYPE_RATIONAL: {

  1367.                 AVRational val;

  1368.                 val = av_d2q(opt->default_val.dbl, INT_MAX);

  1369.                 write_number(s, opt, dst, 1, val.den, val.num);

  1370.             }

  1371.             break;

  1372.             case AV_OPT_TYPE_COLOR:

  1373.                 set_string_color(s, opt, opt->default_val.str, dst);

  1374.                 break;

  1375.             case AV_OPT_TYPE_STRING:

  1376.                 set_string(s, opt, opt->default_val.str, dst);

  1377.                 break;

  1378.             case AV_OPT_TYPE_IMAGE_SIZE:

  1379.                 set_string_image_size(s, opt, opt->default_val.str, dst);

  1380.                 break;

  1381.             case AV_OPT_TYPE_VIDEO_RATE:

  1382.                 set_string_video_rate(s, opt, opt->default_val.str, dst);

  1383.                 break;

  1384.             case AV_OPT_TYPE_BINARY:

  1385.                 set_string_binary(s, opt, opt->default_val.str, dst);

  1386.                 break;

  1387.             case AV_OPT_TYPE_DICT:

  1388.                 /* Cannot set defaults for these types */

  1389.             break;

  1390.         default:

  1391.             av_log(s, AV_LOG_DEBUG, "AVOption type %d of option %s not implemented yet\n",

  1392.                    opt->type, opt->name);

  1393.         }

  1394.     }

  1395. }

  1396. 

  1397. /**

  1398.  * Store the value in the field in ctx that is named like key.

  1399.  * ctx must be an AVClass context, storing is done using AVOptions.

  1400.  *

  1401.  * @param buf the string to parse, buf will be updated to point at the

  1402.  * separator just after the parsed key/value pair

  1403.  * @param key_val_sep a 0-terminated list of characters used to

  1404.  * separate key from value

  1405.  * @param pairs_sep a 0-terminated list of characters used to separate

  1406.  * two pairs from each other

  1407.  * @return 0 if the key/value pair has been successfully parsed and

  1408.  * set, or a negative value corresponding to an AVERROR code in case

  1409.  * of error:

  1410.  * AVERROR(EINVAL) if the key/value pair cannot be parsed,

  1411.  * the error code issued by av_opt_set() if the key/value pair

  1412.  * cannot be set

  1413.  */

  1414. static int parse_key_value_pair(void *ctx, const char **buf,

  1415.                                 const char *key_val_sep, const char *pairs_sep)

  1416. {

  1417.     char *key = av_get_token(buf, key_val_sep);

  1418.     char *val;

  1419.     int ret;

  1420. 

  1421.     if (!key)

  1422.         return AVERROR(ENOMEM);

  1423. 

  1424.     if (*key && strspn(*buf, key_val_sep)) {

  1425.         (*buf)++;

  1426.         val = av_get_token(buf, pairs_sep);

  1427.         if (!val) {

  1428.             av_freep(&key);

  1429.             return AVERROR(ENOMEM);

  1430.         }

  1431.     } else {

  1432.         av_log(ctx, AV_LOG_ERROR, "Missing key or no key/value separator found after key '%s'\n", key);

  1433.         av_free(key);

  1434.         return AVERROR(EINVAL);

  1435.     }

  1436. 

  1437.     av_log(ctx, AV_LOG_DEBUG, "Setting entry with key '%s' to value '%s'\n", key, val);

  1438. 

  1439.     ret = av_opt_set(ctx, key, val, AV_OPT_SEARCH_CHILDREN);

  1440.     if (ret == AVERROR_OPTION_NOT_FOUND)

  1441.         av_log(ctx, AV_LOG_ERROR, "Key '%s' not found.\n", key);

  1442. 

  1443.     av_free(key);

  1444.     av_free(val);

  1445.     return ret;

  1446. }

  1447. 

  1448. int av_set_options_string(void *ctx, const char *opts,

  1449.                           const char *key_val_sep, const char *pairs_sep)

  1450. {

  1451.     int ret, count = 0;

  1452. 

  1453.     if (!opts)

  1454.         return 0;

  1455. 

  1456.     while (*opts) {

  1457.         if ((ret = parse_key_value_pair(ctx, &opts, key_val_sep, pairs_sep)) < 0)

  1458.             return ret;

  1459.         count++;

  1460. 

  1461.         if (*opts)

  1462.             opts++;

  1463.     }

  1464. 

  1465.     return count;

  1466. }

  1467. 

  1468. #define WHITESPACES " \n\t\r"

  1469. 

  1470. static int is_key_char(char c)

  1471. {

  1472.     return (unsigned)((c | 32) - 'a') < 26 ||

  1473.            (unsigned)(c - '0') < 10 ||

  1474.            c == '-' || c == '_' || c == '/' || c == '.';

  1475. }

  1476. 

  1477. /**

  1478.  * Read a key from a string.

  1479.  *

  1480.  * The key consists of is_key_char characters and must be terminated by a

  1481.  * character from the delim string; spaces are ignored.

  1482.  *

  1483.  * @return  0 for success (even with ellipsis), <0 for failure

  1484.  */

  1485. static int get_key(const char **ropts, const char *delim, char **rkey)

  1486. {

  1487.     const char *opts = *ropts;

  1488.     const char *key_start, *key_end;

  1489. 

  1490.     key_start = opts += strspn(opts, WHITESPACES);

  1491.     while (is_key_char(*opts))

  1492.         opts++;

  1493.     key_end = opts;

  1494.     opts += strspn(opts, WHITESPACES);

  1495.     if (!*opts || !strchr(delim, *opts))

  1496.         return AVERROR(EINVAL);

  1497.     opts++;

  1498.     if (!(*rkey = av_malloc(key_end - key_start + 1)))

  1499.         return AVERROR(ENOMEM);

  1500.     memcpy(*rkey, key_start, key_end - key_start);

  1501.     (*rkey)[key_end - key_start] = 0;

  1502.     *ropts = opts;

  1503.     return 0;

  1504. }

  1505. 

  1506. int av_opt_get_key_value(const char **ropts,

  1507.                          const char *key_val_sep, const char *pairs_sep,

  1508.                          unsigned flags,

  1509.                          char **rkey, char **rval)

  1510. {

  1511.     int ret;

  1512.     char *key = NULL, *val;

  1513.     const char *opts = *ropts;

  1514. 

  1515.     if ((ret = get_key(&opts, key_val_sep, &key)) < 0 &&

  1516.         !(flags & AV_OPT_FLAG_IMPLICIT_KEY))

  1517.         return AVERROR(EINVAL);

  1518.     if (!(val = av_get_token(&opts, pairs_sep))) {

  1519.         av_free(key);

  1520.         return AVERROR(ENOMEM);

  1521.     }

  1522.     *ropts = opts;

  1523.     *rkey  = key;

  1524.     *rval  = val;

  1525.     return 0;

  1526. }

  1527. 

  1528. int av_opt_set_from_string(void *ctx, const char *opts,

  1529.                            const char *const *shorthand,

  1530.                            const char *key_val_sep, const char *pairs_sep)

  1531. {

  1532.     int ret, count = 0;

  1533.     const char *dummy_shorthand = NULL;

  1534.     char *av_uninit(parsed_key), *av_uninit(value);

  1535.     const char *key;

  1536. 

  1537.     if (!opts)

  1538.         return 0;

  1539.     if (!shorthand)

  1540.         shorthand = &dummy_shorthand;

  1541. 

  1542.     while (*opts) {

  1543.         ret = av_opt_get_key_value(&opts, key_val_sep, pairs_sep,

  1544.                                    *shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,

  1545.                                    &parsed_key, &value);

  1546.         if (ret < 0) {

  1547.             if (ret == AVERROR(EINVAL))

  1548.                 av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", opts);

  1549.             else

  1550.                 av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", opts,

  1551.                        av_err2str(ret));

  1552.             return ret;

  1553.         }

  1554.         if (*opts)

  1555.             opts++;

  1556.         if (parsed_key) {

  1557.             key = parsed_key;

  1558.             while (*shorthand) /* discard all remaining shorthand */

  1559.                 shorthand++;

  1560.         } else {

  1561.             key = *(shorthand++);

  1562.         }

  1563. 

  1564.         av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);

  1565.         if ((ret = av_opt_set(ctx, key, value, 0)) < 0) {

  1566.             if (ret == AVERROR_OPTION_NOT_FOUND)

  1567.                 av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);

  1568.             av_free(value);

  1569.             av_free(parsed_key);

  1570.             return ret;

  1571.         }

  1572. 

  1573.         av_free(value);

  1574.         av_free(parsed_key);

  1575.         count++;

  1576.     }

  1577.     return count;

  1578. }

  1579. 

  1580. void av_opt_free(void *obj)

  1581. {

  1582.     const AVOption *o = NULL;

  1583.     while ((o = av_opt_next(obj, o))) {

  1584.         switch (o->type) {

  1585.         case AV_OPT_TYPE_STRING:

  1586.         case AV_OPT_TYPE_BINARY:

  1587.             av_freep((uint8_t *)obj + o->offset);

  1588.             break;

  1589. 

  1590.         case AV_OPT_TYPE_DICT:

  1591.             av_dict_free((AVDictionary **)(((uint8_t *)obj) + o->offset));

  1592.             break;

  1593. 

  1594.         default:

  1595.             break;

  1596.         }

  1597.     }

  1598. }

  1599. 

  1600. int av_opt_set_dict2(void *obj, AVDictionary **options, int search_flags)

  1601. {

  1602.     AVDictionaryEntry *t = NULL;

  1603.     AVDictionary    *tmp = NULL;

  1604.     int ret = 0;

  1605. 

  1606.     if (!options)

  1607.         return 0;

  1608. 

  1609.     while ((t = av_dict_get(*options, "", t, AV_DICT_IGNORE_SUFFIX))) {

  1610.         ret = av_opt_set(obj, t->key, t->value, search_flags);

  1611.         if (ret == AVERROR_OPTION_NOT_FOUND)

  1612.             ret = av_dict_set(&tmp, t->key, t->value, 0);

  1613.         if (ret < 0) {

  1614.             av_log(obj, AV_LOG_ERROR, "Error setting option %s to value %s.\n", t->key, t->value);

  1615.             av_dict_free(&tmp);

  1616.             return ret;

  1617.         }

  1618.         ret = 0;

  1619.     }

  1620.     av_dict_free(options);

  1621.     *options = tmp;

  1622.     return ret;

  1623. }

  1624. 

  1625. int av_opt_set_dict(void *obj, AVDictionary **options)

  1626. {

  1627.     return av_opt_set_dict2(obj, options, 0);

  1628. }

  1629. 

  1630. const AVOption *av_opt_find(void *obj, const char *name, const char *unit,

  1631.                             int opt_flags, int search_flags)

  1632. {

  1633.     return av_opt_find2(obj, name, unit, opt_flags, search_flags, NULL);

  1634. }

  1635. 

  1636. const AVOption *av_opt_find2(void *obj, const char *name, const char *unit,

  1637.                              int opt_flags, int search_flags, void **target_obj)

  1638. {

  1639.     const AVClass  *c;

  1640.     const AVOption *o = NULL;

  1641. 

  1642.     if(!obj)

  1643.         return NULL;

  1644. 

  1645.     c= *(AVClass**)obj;

  1646. 

  1647.     if (!c)

  1648.         return NULL;

  1649. 

  1650.     if (search_flags & AV_OPT_SEARCH_CHILDREN) {

  1651.         if (search_flags & AV_OPT_SEARCH_FAKE_OBJ) {

  1652.             const AVClass *child = NULL;

  1653.             while (child = av_opt_child_class_next(c, child))

  1654.                 if (o = av_opt_find2(&child, name, unit, opt_flags, search_flags, NULL))

  1655.                     return o;

  1656.         } else {

  1657.             void *child = NULL;

  1658.             while (child = av_opt_child_next(obj, child))

  1659.                 if (o = av_opt_find2(child, name, unit, opt_flags, search_flags, target_obj))

  1660.                     return o;

  1661.         }

  1662.     }

  1663. 

  1664.     while (o = av_opt_next(obj, o)) {

  1665.         if (!strcmp(o->name, name) && (o->flags & opt_flags) == opt_flags &&

  1666.             ((!unit && o->type != AV_OPT_TYPE_CONST) ||

  1667.              (unit  && o->type == AV_OPT_TYPE_CONST && o->unit && !strcmp(o->unit, unit)))) {

  1668.             if (target_obj) {

  1669.                 if (!(search_flags & AV_OPT_SEARCH_FAKE_OBJ))

  1670.                     *target_obj = obj;

  1671.                 else

  1672.                     *target_obj = NULL;

  1673.             }

  1674.             return o;

  1675.         }

  1676.     }

  1677.     return NULL;

  1678. }

  1679. 

  1680. void *av_opt_child_next(void *obj, void *prev)

  1681. {

  1682.     const AVClass *c = *(AVClass **)obj;

  1683.     if (c->child_next)

  1684.         return c->child_next(obj, prev);

  1685.     return NULL;

  1686. }

  1687. 

  1688. const AVClass *av_opt_child_class_next(const AVClass *parent, const AVClass *prev)

  1689. {

  1690.     if (parent->child_class_next)

  1691.         return parent->child_class_next(prev);

  1692.     return NULL;

  1693. }

  1694. 

  1695. void *av_opt_ptr(const AVClass *class, void *obj, const char *name)

  1696. {

  1697.     const AVOption *opt= av_opt_find2(&class, name, NULL, 0, AV_OPT_SEARCH_FAKE_OBJ, NULL);

  1698.     if(!opt)

  1699.         return NULL;

  1700.     return (uint8_t*)obj + opt->offset;

  1701. }

  1702. 

  1703. static int opt_size(enum AVOptionType type)

  1704. {

  1705.     switch(type) {

  1706.     case AV_OPT_TYPE_BOOL:

  1707.     case AV_OPT_TYPE_INT:

  1708.     case AV_OPT_TYPE_FLAGS:

  1709.         return sizeof(int);

  1710.     case AV_OPT_TYPE_DURATION:

  1711.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1712.     case AV_OPT_TYPE_INT64:

  1713.     case AV_OPT_TYPE_UINT64:

  1714.         return sizeof(int64_t);

  1715.     case AV_OPT_TYPE_DOUBLE:

  1716.         return sizeof(double);

  1717.     case AV_OPT_TYPE_FLOAT:

  1718.         return sizeof(float);

  1719.     case AV_OPT_TYPE_STRING:

  1720.         return sizeof(uint8_t*);

  1721.     case AV_OPT_TYPE_VIDEO_RATE:

  1722.     case AV_OPT_TYPE_RATIONAL:

  1723.         return sizeof(AVRational);

  1724.     case AV_OPT_TYPE_BINARY:

  1725.         return sizeof(uint8_t*) + sizeof(int);

  1726.     case AV_OPT_TYPE_IMAGE_SIZE:

  1727.         return sizeof(int[2]);

  1728.     case AV_OPT_TYPE_PIXEL_FMT:

  1729.         return sizeof(enum AVPixelFormat);

  1730.     case AV_OPT_TYPE_SAMPLE_FMT:

  1731.         return sizeof(enum AVSampleFormat);

  1732.     case AV_OPT_TYPE_COLOR:

  1733.         return 4;

  1734.     }

  1735.     return AVERROR(EINVAL);

  1736. }

  1737. 

  1738. int av_opt_copy(void *dst, const void *src)

  1739. {

  1740.     const AVOption *o = NULL;

  1741.     const AVClass *c;

  1742.     int ret = 0;

  1743. 

  1744.     if (!src)

  1745.         return AVERROR(EINVAL);

  1746. 

  1747.     c = *(AVClass **)src;

  1748.     if (!c || c != *(AVClass **)dst)

  1749.         return AVERROR(EINVAL);

  1750. 

  1751.     while ((o = av_opt_next(src, o))) {

  1752.         void *field_dst = (uint8_t *)dst + o->offset;

  1753.         void *field_src = (uint8_t *)src + o->offset;

  1754.         uint8_t **field_dst8 = (uint8_t **)field_dst;

  1755.         uint8_t **field_src8 = (uint8_t **)field_src;

  1756. 

  1757.         if (o->type == AV_OPT_TYPE_STRING) {

  1758.             if (*field_dst8 != *field_src8)

  1759.                 av_freep(field_dst8);

  1760.             *field_dst8 = av_strdup(*field_src8);

  1761.             if (*field_src8 && !*field_dst8)

  1762.                 ret = AVERROR(ENOMEM);

  1763.         } else if (o->type == AV_OPT_TYPE_BINARY) {

  1764.             int len = *(int *)(field_src8 + 1);

  1765.             if (*field_dst8 != *field_src8)

  1766.                 av_freep(field_dst8);

  1767.             *field_dst8 = av_memdup(*field_src8, len);

  1768.             if (len && !*field_dst8) {

  1769.                 ret = AVERROR(ENOMEM);

  1770.                 len = 0;

  1771.             }

  1772.             *(int *)(field_dst8 + 1) = len;

  1773.         } else if (o->type == AV_OPT_TYPE_CONST) {

  1774.             // do nothing

  1775.         } else if (o->type == AV_OPT_TYPE_DICT) {

  1776.             AVDictionary **sdict = (AVDictionary **) field_src;

  1777.             AVDictionary **ddict = (AVDictionary **) field_dst;

  1778.             if (*sdict != *ddict)

  1779.                 av_dict_free(ddict);

  1780.             *ddict = NULL;

  1781.             av_dict_copy(ddict, *sdict, 0);

  1782.             if (av_dict_count(*sdict) != av_dict_count(*ddict))

  1783.                 ret = AVERROR(ENOMEM);

  1784.         } else {

  1785.             int size = opt_size(o->type);

  1786.             if (size < 0)

  1787.                 ret = size;

  1788.             else

  1789.                 memcpy(field_dst, field_src, size);

  1790.         }

  1791.     }

  1792.     return ret;

  1793. }

  1794. 

  1795. int av_opt_query_ranges(AVOptionRanges **ranges_arg, void *obj, const char *key, int flags)

  1796. {

  1797.     int ret;

  1798.     const AVClass *c = *(AVClass**)obj;

  1799.     int (*callback)(AVOptionRanges **, void *obj, const char *key, int flags) = NULL;

  1800. 

  1801.     if (c->version > (52 << 16 | 11 << 8))

  1802.         callback = c->query_ranges;

  1803. 

  1804.     if (!callback)

  1805.         callback = av_opt_query_ranges_default;

  1806. 

  1807.     ret = callback(ranges_arg, obj, key, flags);

  1808.     if (ret >= 0) {

  1809.         if (!(flags & AV_OPT_MULTI_COMPONENT_RANGE))

  1810.             ret = 1;

  1811.         (*ranges_arg)->nb_components = ret;

  1812.     }

  1813.     return ret;

  1814. }

  1815. 

  1816. int av_opt_query_ranges_default(AVOptionRanges **ranges_arg, void *obj, const char *key, int flags)

  1817. {

  1818.     AVOptionRanges *ranges = av_mallocz(sizeof(*ranges));

  1819.     AVOptionRange **range_array = av_mallocz(sizeof(void*));

  1820.     AVOptionRange *range = av_mallocz(sizeof(*range));

  1821.     const AVOption *field = av_opt_find(obj, key, NULL, 0, flags);

  1822.     int ret;

  1823. 

  1824.     *ranges_arg = NULL;

  1825. 

  1826.     if (!ranges || !range || !range_array || !field) {

  1827.         ret = AVERROR(ENOMEM);

  1828.         goto fail;

  1829.     }

  1830. 

  1831.     ranges->range = range_array;

  1832.     ranges->range[0] = range;

  1833.     ranges->nb_ranges = 1;

  1834.     ranges->nb_components = 1;

  1835.     range->is_range = 1;

  1836.     range->value_min = field->min;

  1837.     range->value_max = field->max;

  1838. 

  1839.     switch (field->type) {

  1840.     case AV_OPT_TYPE_BOOL:

  1841.     case AV_OPT_TYPE_INT:

  1842.     case AV_OPT_TYPE_INT64:

  1843.     case AV_OPT_TYPE_UINT64:

  1844.     case AV_OPT_TYPE_PIXEL_FMT:

  1845.     case AV_OPT_TYPE_SAMPLE_FMT:

  1846.     case AV_OPT_TYPE_FLOAT:

  1847.     case AV_OPT_TYPE_DOUBLE:

  1848.     case AV_OPT_TYPE_DURATION:

  1849.     case AV_OPT_TYPE_COLOR:

  1850.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1851.         break;

  1852.     case AV_OPT_TYPE_STRING:

  1853.         range->component_min = 0;

  1854.         range->component_max = 0x10FFFF; // max unicode value

  1855.         range->value_min = -1;

  1856.         range->value_max = INT_MAX;

  1857.         break;

  1858.     case AV_OPT_TYPE_RATIONAL:

  1859.         range->component_min = INT_MIN;

  1860.         range->component_max = INT_MAX;

  1861.         break;

  1862.     case AV_OPT_TYPE_IMAGE_SIZE:

  1863.         range->component_min = 0;

  1864.         range->component_max = INT_MAX/128/8;

  1865.         range->value_min = 0;

  1866.         range->value_max = INT_MAX/8;

  1867.         break;

  1868.     case AV_OPT_TYPE_VIDEO_RATE:

  1869.         range->component_min = 1;

  1870.         range->component_max = INT_MAX;

  1871.         range->value_min = 1;

  1872.         range->value_max = INT_MAX;

  1873.         break;

  1874.     default:

  1875.         ret = AVERROR(ENOSYS);

  1876.         goto fail;

  1877.     }

  1878. 

  1879.     *ranges_arg = ranges;

  1880.     return 1;

  1881. fail:

  1882.     av_free(ranges);

  1883.     av_free(range);

  1884.     av_free(range_array);

  1885.     return ret;

  1886. }

  1887. 

  1888. void av_opt_freep_ranges(AVOptionRanges **rangesp)

  1889. {

  1890.     int i;

  1891.     AVOptionRanges *ranges = *rangesp;

  1892. 

  1893.     if (!ranges)

  1894.         return;

  1895. 

  1896.     for (i = 0; i < ranges->nb_ranges * ranges->nb_components; i++) {

  1897.         AVOptionRange *range = ranges->range[i];

  1898.         if (range) {

  1899.             av_freep(&range->str);

  1900.             av_freep(&ranges->range[i]);

  1901.         }

  1902.     }

  1903.     av_freep(&ranges->range);

  1904.     av_freep(rangesp);

  1905. }

  1906. 

  1907. int av_opt_is_set_to_default(void *obj, const AVOption *o)

  1908. {

  1909.     int64_t i64;

  1910.     double d, d2;

  1911.     float f;

  1912.     AVRational q;

  1913.     int ret, w, h;

  1914.     char *str;

  1915.     void *dst;

  1916. 

  1917.     if (!o || !obj)

  1918.         return AVERROR(EINVAL);

  1919. 

  1920.     dst = ((uint8_t*)obj) + o->offset;

  1921. 

  1922.     switch (o->type) {

  1923.     case AV_OPT_TYPE_CONST:

  1924.         return 1;

  1925.     case AV_OPT_TYPE_BOOL:

  1926.     case AV_OPT_TYPE_FLAGS:

  1927.     case AV_OPT_TYPE_PIXEL_FMT:

  1928.     case AV_OPT_TYPE_SAMPLE_FMT:

  1929.     case AV_OPT_TYPE_INT:

  1930.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1931.     case AV_OPT_TYPE_DURATION:

  1932.     case AV_OPT_TYPE_INT64:

  1933.     case AV_OPT_TYPE_UINT64:

  1934.         read_number(o, dst, NULL, NULL, &i64);

  1935.         return o->default_val.i64 == i64;

  1936.     case AV_OPT_TYPE_STRING:

  1937.         str = *(char **)dst;

  1938.         if (str == o->default_val.str) //2 NULLs

  1939.             return 1;

  1940.         if (!str || !o->default_val.str) //1 NULL

  1941.             return 0;

  1942.         return !strcmp(str, o->default_val.str);

  1943.     case AV_OPT_TYPE_DOUBLE:

  1944.         read_number(o, dst, &d, NULL, NULL);

  1945.         return o->default_val.dbl == d;

  1946.     case AV_OPT_TYPE_FLOAT:

  1947.         read_number(o, dst, &d, NULL, NULL);

  1948.         f = o->default_val.dbl;

  1949.         d2 = f;

  1950.         return d2 == d;

  1951.     case AV_OPT_TYPE_RATIONAL:

  1952.         q = av_d2q(o->default_val.dbl, INT_MAX);

  1953.         return !av_cmp_q(*(AVRational*)dst, q);

  1954.     case AV_OPT_TYPE_BINARY: {

  1955.         struct {

  1956.             uint8_t *data;

  1957.             int size;

  1958.         } tmp = {0};

  1959.         int opt_size = *(int *)((void **)dst + 1);

  1960.         void *opt_ptr = *(void **)dst;

  1961.         if (!opt_size && (!o->default_val.str || !strlen(o->default_val.str)))

  1962.             return 1;

  1963.         if (!opt_size ||  !o->default_val.str || !strlen(o->default_val.str ))

  1964.             return 0;

  1965.         if (opt_size != strlen(o->default_val.str) / 2)

  1966.             return 0;

  1967.         ret = set_string_binary(NULL, NULL, o->default_val.str, &tmp.data);

  1968.         if (!ret)

  1969.             ret = !memcmp(opt_ptr, tmp.data, tmp.size);

  1970.         av_free(tmp.data);

  1971.         return ret;

  1972.     }

  1973.     case AV_OPT_TYPE_DICT:

  1974.         /* Binary and dict have not default support yet. Any pointer is not default. */

  1975.         return !!(*(void **)dst);

  1976.     case AV_OPT_TYPE_IMAGE_SIZE:

  1977.         if (!o->default_val.str || !strcmp(o->default_val.str, "none"))

  1978.             w = h = 0;

  1979.         else if ((ret = av_parse_video_size(&w, &h, o->default_val.str)) < 0)

  1980.             return ret;

  1981.         return (w == *(int *)dst) && (h == *((int *)dst+1));

  1982.     case AV_OPT_TYPE_VIDEO_RATE:

  1983.         q = (AVRational){0, 0};

  1984.         if (o->default_val.str) {

  1985.             if ((ret = av_parse_video_rate(&q, o->default_val.str)) < 0)

  1986.                 return ret;

  1987.         }

  1988.         return !av_cmp_q(*(AVRational*)dst, q);

  1989.     case AV_OPT_TYPE_COLOR: {

  1990.         uint8_t color[4] = {0, 0, 0, 0};

  1991.         if (o->default_val.str) {

  1992.             if ((ret = av_parse_color(color, o->default_val.str, -1, NULL)) < 0)

  1993.                 return ret;

  1994.         }

  1995.         return !memcmp(color, dst, sizeof(color));

  1996.     }

  1997.     default:

  1998.         av_log(obj, AV_LOG_WARNING, "Not supported option type: %d, option name: %s\n", o->type, o->name);

  1999.         break;

  2000.     }

  2001.     return AVERROR_PATCHWELCOME;

  2002. }

  2003. 

  2004. int av_opt_is_set_to_default_by_name(void *obj, const char *name, int search_flags)

  2005. {

  2006.     const AVOption *o;

  2007.     void *target;

  2008.     if (!obj)

  2009.         return AVERROR(EINVAL);

  2010.     o = av_opt_find2(obj, name, NULL, 0, search_flags, &target);

  2011.     if (!o)

  2012.         return AVERROR_OPTION_NOT_FOUND;

  2013.     return av_opt_is_set_to_default(target, o);

  2014. }

  2015. 

  2016. int av_opt_serialize(void *obj, int opt_flags, int flags, char **buffer,

  2017.                      const char key_val_sep, const char pairs_sep)

  2018. {

  2019.     const AVOption *o = NULL;

  2020.     uint8_t *buf;

  2021.     AVBPrint bprint;

  2022.     int ret, cnt = 0;

  2023.     const char special_chars[] = {pairs_sep, key_val_sep, '\0'};

  2024. 

  2025.     if (pairs_sep == '\0' || key_val_sep == '\0' || pairs_sep == key_val_sep ||

  2026.         pairs_sep == '\\' || key_val_sep == '\\') {

  2027.         av_log(obj, AV_LOG_ERROR, "Invalid separator(s) found.");

  2028.         return AVERROR(EINVAL);

  2029.     }

  2030. 

  2031.     if (!obj || !buffer)

  2032.         return AVERROR(EINVAL);

  2033. 

  2034.     *buffer = NULL;

  2035.     av_bprint_init(&bprint, 64, AV_BPRINT_SIZE_UNLIMITED);

  2036. 

  2037.     while (o = av_opt_next(obj, o)) {

  2038.         if (o->type == AV_OPT_TYPE_CONST)

  2039.             continue;

  2040.         if ((flags & AV_OPT_SERIALIZE_OPT_FLAGS_EXACT) && o->flags != opt_flags)

  2041.             continue;

  2042.         else if (((o->flags & opt_flags) != opt_flags))

  2043.             continue;

  2044.         if (flags & AV_OPT_SERIALIZE_SKIP_DEFAULTS && av_opt_is_set_to_default(obj, o) > 0)

  2045.             continue;

  2046.         if ((ret = av_opt_get(obj, o->name, 0, &buf)) < 0) {

  2047.             av_bprint_finalize(&bprint, NULL);

  2048.             return ret;

  2049.         }

  2050.         if (buf) {

  2051.             if (cnt++)

  2052.                 av_bprint_append_data(&bprint, &pairs_sep, 1);

  2053.             av_bprint_escape(&bprint, o->name, special_chars, AV_ESCAPE_MODE_BACKSLASH, 0);

  2054.             av_bprint_append_data(&bprint, &key_val_sep, 1);

  2055.             av_bprint_escape(&bprint, buf, special_chars, AV_ESCAPE_MODE_BACKSLASH, 0);

  2056.             av_freep(&buf);

  2057.         }

  2058.     }

  2059.     av_bprint_finalize(&bprint, buffer);

  2060.     return 0;

  2061. }