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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.         if (!val) {

  500.             *(int64_t *)dst = 0;

  501.             return 0;

  502.         } else {

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

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

  505.             return ret;

  506.         }

  507.         break;

  508.     case AV_OPT_TYPE_COLOR:

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

  510.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

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

  512.             *(int64_t *)dst = 0;

  513.         } else {

  514.             int64_t cl = av_get_channel_layout(val);

  515.             if (!cl) {

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

  517.                 ret = AVERROR(EINVAL);

  518.             }

  519.             *(int64_t *)dst = cl;

  520.             return ret;

  521.         }

  522.         break;

  523.     }

  524. 

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

  526.     return AVERROR(EINVAL);

  527. }

  528. 

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

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

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

  532. {                                                                       \

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

  534.         return AVERROR(EINVAL);                                         \

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

  536. }

  537. 

  538. OPT_EVAL_NUMBER(flags,  AV_OPT_TYPE_FLAGS,    int)

  539. OPT_EVAL_NUMBER(int,    AV_OPT_TYPE_INT,      int)

  540. OPT_EVAL_NUMBER(int64,  AV_OPT_TYPE_INT64,    int64_t)

  541. OPT_EVAL_NUMBER(float,  AV_OPT_TYPE_FLOAT,    float)

  542. OPT_EVAL_NUMBER(double, AV_OPT_TYPE_DOUBLE,   double)

  543. OPT_EVAL_NUMBER(q,      AV_OPT_TYPE_RATIONAL, AVRational)

  544. 

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

  546.                       int search_flags)

  547. {

  548.     void *dst, *target_obj;

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

  550. 

  551.     if (!o || !target_obj)

  552.         return AVERROR_OPTION_NOT_FOUND;

  553. 

  554.     if (o->flags & AV_OPT_FLAG_READONLY)

  555.         return AVERROR(EINVAL);

  556. 

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

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

  559. }

  560. 

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

  562. {

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

  564. }

  565. 

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

  567. {

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

  569. }

  570. 

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

  572. {

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

  574. }

  575. 

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

  577. {

  578.     void *target_obj;

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

  580.     uint8_t *ptr;

  581.     uint8_t **dst;

  582.     int *lendst;

  583. 

  584.     if (!o || !target_obj)

  585.         return AVERROR_OPTION_NOT_FOUND;

  586. 

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

  588.         return AVERROR(EINVAL);

  589. 

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

  591.     if (len && !ptr)

  592.         return AVERROR(ENOMEM);

  593. 

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

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

  596. 

  597.     av_free(*dst);

  598.     *dst    = ptr;

  599.     *lendst = len;

  600.     if (len)

  601.         memcpy(ptr, val, len);

  602. 

  603.     return 0;

  604. }

  605. 

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

  607. {

  608.     void *target_obj;

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

  610. 

  611.     if (!o || !target_obj)

  612.         return AVERROR_OPTION_NOT_FOUND;

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

  614.         av_log(obj, AV_LOG_ERROR,

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

  616.         return AVERROR(EINVAL);

  617.     }

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

  619.         av_log(obj, AV_LOG_ERROR,

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

  621.         return AVERROR(EINVAL);

  622.     }

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

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

  625.     return 0;

  626. }

  627. 

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

  629. {

  630.     void *target_obj;

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

  632. 

  633.     if (!o || !target_obj)

  634.         return AVERROR_OPTION_NOT_FOUND;

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

  636.         av_log(obj, AV_LOG_ERROR,

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

  638.         return AVERROR(EINVAL);

  639.     }

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

  641.         return AVERROR(EINVAL);

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

  643. }

  644. 

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

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

  647. {

  648.     void *target_obj;

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

  650.                                      search_flags, &target_obj);

  651.     int min, max;

  652. 

  653.     if (!o || !target_obj)

  654.         return AVERROR_OPTION_NOT_FOUND;

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

  656.         av_log(obj, AV_LOG_ERROR,

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

  658.         return AVERROR(EINVAL);

  659.     }

  660. 

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

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

  663. 

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

  665.         av_log(obj, AV_LOG_ERROR,

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

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

  668.         return AVERROR(ERANGE);

  669.     }

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

  671.     return 0;

  672. }

  673. 

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

  675. {

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

  677. }

  678. 

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

  680. {

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

  682. }

  683. 

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

  685. {

  686.     void *target_obj;

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

  688. 

  689.     if (!o || !target_obj)

  690.         return AVERROR_OPTION_NOT_FOUND;

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

  692.         av_log(obj, AV_LOG_ERROR,

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

  694.         return AVERROR(EINVAL);

  695.     }

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

  697.     return 0;

  698. }

  699. 

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

  701.                         int search_flags)

  702. {

  703.     void *target_obj;

  704.     AVDictionary **dst;

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

  706. 

  707.     if (!o || !target_obj)

  708.         return AVERROR_OPTION_NOT_FOUND;

  709.     if (o->flags & AV_OPT_FLAG_READONLY)

  710.         return AVERROR(EINVAL);

  711. 

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

  713.     av_dict_free(dst);

  714.     av_dict_copy(dst, val, 0);

  715. 

  716.     return 0;

  717. }

  718. 

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

  720. {

  721.     char *e;

  722. 

  723.     av_assert0(size >= 25);

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

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

  726.         size--;

  727.         d = -d;

  728.     }

  729.     if (d == INT64_MAX)

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

  731.     else if (d == INT64_MIN)

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

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

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

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

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

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

  738.     else if (d > 60*1000000)

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

  740.                  (int)(d / 60000000),

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

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

  743.     else

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

  745.                  (int)(d / 1000000),

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

  747.     e = buf + strlen(buf);

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

  749.         *(--e) = 0;

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

  751.         *(--e) = 0;

  752. }

  753. 

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

  755. {

  756.     void *dst, *target_obj;

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

  758.     uint8_t *bin, buf[128];

  759.     int len, i, ret;

  760.     int64_t i64;

  761. 

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

  763.         return AVERROR_OPTION_NOT_FOUND;

  764. 

  765.     if (o->flags & AV_OPT_FLAG_DEPRECATED)

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

  767. 

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

  769. 

  770.     buf[0] = 0;

  771.     switch (o->type) {

  772.     case AV_OPT_TYPE_BOOL:

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

  774.         break;

  775.     case AV_OPT_TYPE_FLAGS:

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

  777.         break;

  778.     case AV_OPT_TYPE_INT:

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

  780.         break;

  781.     case AV_OPT_TYPE_INT64:

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

  783.         break;

  784.     case AV_OPT_TYPE_UINT64:

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

  786.         break;

  787.     case AV_OPT_TYPE_FLOAT:

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

  789.         break;

  790.     case AV_OPT_TYPE_DOUBLE:

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

  792.         break;

  793.     case AV_OPT_TYPE_VIDEO_RATE:

  794.     case AV_OPT_TYPE_RATIONAL:

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

  796.         break;

  797.     case AV_OPT_TYPE_CONST:

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

  799.         break;

  800.     case AV_OPT_TYPE_STRING:

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

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

  803.         } else if (search_flags & AV_OPT_ALLOW_NULL) {

  804.             *out_val = NULL;

  805.             return 0;

  806.         } else {

  807.             *out_val = av_strdup("");

  808.         }

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

  810.     case AV_OPT_TYPE_BINARY:

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

  812.             *out_val = NULL;

  813.             return 0;

  814.         }

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

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

  817.             return AVERROR(EINVAL);

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

  819.             return AVERROR(ENOMEM);

  820.         if (!len) {

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

  822.             return 0;

  823.         }

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

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

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

  827.         return 0;

  828.     case AV_OPT_TYPE_IMAGE_SIZE:

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

  830.         break;

  831.     case AV_OPT_TYPE_PIXEL_FMT:

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

  833.         break;

  834.     case AV_OPT_TYPE_SAMPLE_FMT:

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

  836.         break;

  837.     case AV_OPT_TYPE_DURATION:

  838.         i64 = *(int64_t *)dst;

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

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

  841.         break;

  842.     case AV_OPT_TYPE_COLOR:

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

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

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

  846.         break;

  847.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  848.         i64 = *(int64_t *)dst;

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

  850.         break;

  851.     default:

  852.         return AVERROR(EINVAL);

  853.     }

  854. 

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

  856.         return AVERROR(EINVAL);

  857.     *out_val = av_strdup(buf);

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

  859. }

  860. 

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

  862.                       int search_flags)

  863. {

  864.     void *dst, *target_obj;

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

  866.     if (!o || !target_obj)

  867.         goto error;

  868. 

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

  870. 

  871.     if (o_out) *o_out= o;

  872. 

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

  874. 

  875. error:

  876.     *den    =

  877.     *intnum = 0;

  878.     return -1;

  879. }

  880. 

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

  882. {

  883.     int64_t intnum = 1;

  884.     double num = 1;

  885.     int ret, den = 1;

  886. 

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

  888.         return ret;

  889.     *out_val = num * intnum / den;

  890.     return 0;

  891. }

  892. 

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

  894. {

  895.     int64_t intnum = 1;

  896.     double num = 1;

  897.     int ret, den = 1;

  898. 

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

  900.         return ret;

  901.     *out_val = num * intnum / den;

  902.     return 0;

  903. }

  904. 

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

  906. {

  907.     int64_t intnum = 1;

  908.     double num = 1;

  909.     int ret, den = 1;

  910. 

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

  912.         return ret;

  913. 

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

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

  916.     else

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

  918.     return 0;

  919. }

  920. 

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

  922. {

  923.     void *dst, *target_obj;

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

  925.     if (!o || !target_obj)

  926.         return AVERROR_OPTION_NOT_FOUND;

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

  928.         av_log(obj, AV_LOG_ERROR,

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

  930.         return AVERROR(EINVAL);

  931.     }

  932. 

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

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

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

  936.     return 0;

  937. }

  938. 

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

  940. {

  941.     int64_t intnum = 1;

  942.     double     num = 1;

  943.     int   ret, den = 1;

  944. 

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

  946.         return ret;

  947. 

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

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

  950.     else

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

  952.     return 0;

  953. }

  954. 

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

  956.                       enum AVOptionType type, const char *desc)

  957. {

  958.     void *dst, *target_obj;

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

  960.     if (!o || !target_obj)

  961.         return AVERROR_OPTION_NOT_FOUND;

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

  963.         av_log(obj, AV_LOG_ERROR,

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

  965.         return AVERROR(EINVAL);

  966.     }

  967. 

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

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

  970.     return 0;

  971. }

  972. 

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

  974. {

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

  976. }

  977. 

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

  979. {

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

  981. }

  982. 

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

  984. {

  985.     void *dst, *target_obj;

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

  987.     if (!o || !target_obj)

  988.         return AVERROR_OPTION_NOT_FOUND;

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

  990.         av_log(obj, AV_LOG_ERROR,

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

  992.         return AVERROR(EINVAL);

  993.     }

  994. 

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

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

  997.     return 0;

  998. }

  999. 

  1000. int av_opt_get_dict_val(void *obj, const char *name, int search_flags, AVDictionary **out_val)

  1001. {

  1002.     void *target_obj;

  1003.     AVDictionary *src;

  1004.     const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);

  1005. 

  1006.     if (!o || !target_obj)

  1007.         return AVERROR_OPTION_NOT_FOUND;

  1008.     if (o->type != AV_OPT_TYPE_DICT)

  1009.         return AVERROR(EINVAL);

  1010. 

  1011.     src = *(AVDictionary **)(((uint8_t *)target_obj) + o->offset);

  1012.     av_dict_copy(out_val, src, 0);

  1013. 

  1014.     return 0;

  1015. }

  1016. 

  1017. int av_opt_flag_is_set(void *obj, const char *field_name, const char *flag_name)

  1018. {

  1019.     const AVOption *field = av_opt_find(obj, field_name, NULL, 0, 0);

  1020.     const AVOption *flag  = av_opt_find(obj, flag_name,

  1021.                                         field ? field->unit : NULL, 0, 0);

  1022.     int64_t res;

  1023. 

  1024.     if (!field || !flag || flag->type != AV_OPT_TYPE_CONST ||

  1025.         av_opt_get_int(obj, field_name, 0, &res) < 0)

  1026.         return 0;

  1027.     return res & flag->default_val.i64;

  1028. }

  1029. 

  1030. static void log_value(void *av_log_obj, int level, double d)

  1031. {

  1032.     if      (d == INT_MAX) {

  1033.         av_log(av_log_obj, level, "INT_MAX");

  1034.     } else if (d == INT_MIN) {

  1035.         av_log(av_log_obj, level, "INT_MIN");

  1036.     } else if (d == UINT32_MAX) {

  1037.         av_log(av_log_obj, level, "UINT32_MAX");

  1038.     } else if (d == (double)INT64_MAX) {

  1039.         av_log(av_log_obj, level, "I64_MAX");

  1040.     } else if (d == INT64_MIN) {

  1041.         av_log(av_log_obj, level, "I64_MIN");

  1042.     } else if (d == FLT_MAX) {

  1043.         av_log(av_log_obj, level, "FLT_MAX");

  1044.     } else if (d == FLT_MIN) {

  1045.         av_log(av_log_obj, level, "FLT_MIN");

  1046.     } else if (d == -FLT_MAX) {

  1047.         av_log(av_log_obj, level, "-FLT_MAX");

  1048.     } else if (d == -FLT_MIN) {

  1049.         av_log(av_log_obj, level, "-FLT_MIN");

  1050.     } else if (d == DBL_MAX) {

  1051.         av_log(av_log_obj, level, "DBL_MAX");

  1052.     } else if (d == DBL_MIN) {

  1053.         av_log(av_log_obj, level, "DBL_MIN");

  1054.     } else if (d == -DBL_MAX) {

  1055.         av_log(av_log_obj, level, "-DBL_MAX");

  1056.     } else if (d == -DBL_MIN) {

  1057.         av_log(av_log_obj, level, "-DBL_MIN");

  1058.     } else {

  1059.         av_log(av_log_obj, level, "%g", d);

  1060.     }

  1061. }

  1062. 

  1063. static const char *get_opt_const_name(void *obj, const char *unit, int64_t value)

  1064. {

  1065.     const AVOption *opt = NULL;

  1066. 

  1067.     if (!unit)

  1068.         return NULL;

  1069.     while ((opt = av_opt_next(obj, opt)))

  1070.         if (opt->type == AV_OPT_TYPE_CONST && !strcmp(opt->unit, unit) &&

  1071.             opt->default_val.i64 == value)

  1072.             return opt->name;

  1073.     return NULL;

  1074. }

  1075. 

  1076. static char *get_opt_flags_string(void *obj, const char *unit, int64_t value)

  1077. {

  1078.     const AVOption *opt = NULL;

  1079.     char flags[512];

  1080. 

  1081.     flags[0] = 0;

  1082.     if (!unit)

  1083.         return NULL;

  1084.     while ((opt = av_opt_next(obj, opt))) {

  1085.         if (opt->type == AV_OPT_TYPE_CONST && !strcmp(opt->unit, unit) &&

  1086.             opt->default_val.i64 & value) {

  1087.             if (flags[0])

  1088.                 av_strlcatf(flags, sizeof(flags), "+");

  1089.             av_strlcatf(flags, sizeof(flags), "%s", opt->name);

  1090.         }

  1091.     }

  1092.     if (flags[0])

  1093.         return av_strdup(flags);

  1094.     return NULL;

  1095. }

  1096. 

  1097. static void opt_list(void *obj, void *av_log_obj, const char *unit,

  1098.                      int req_flags, int rej_flags)

  1099. {

  1100.     const AVOption *opt = NULL;

  1101.     AVOptionRanges *r;

  1102.     int i;

  1103. 

  1104.     while ((opt = av_opt_next(obj, opt))) {

  1105.         if (!(opt->flags & req_flags) || (opt->flags & rej_flags))

  1106.             continue;

  1107. 

  1108.         /* Don't print CONST's on level one.

  1109.          * Don't print anything but CONST's on level two.

  1110.          * Only print items from the requested unit.

  1111.          */

  1112.         if (!unit && opt->type == AV_OPT_TYPE_CONST)

  1113.             continue;

  1114.         else if (unit && opt->type != AV_OPT_TYPE_CONST)

  1115.             continue;

  1116.         else if (unit && opt->type == AV_OPT_TYPE_CONST && strcmp(unit, opt->unit))

  1117.             continue;

  1118.         else if (unit && opt->type == AV_OPT_TYPE_CONST)

  1119.             av_log(av_log_obj, AV_LOG_INFO, "     %-15s ", opt->name);

  1120.         else

  1121.             av_log(av_log_obj, AV_LOG_INFO, "  %s%-17s ",

  1122.                    (opt->flags & AV_OPT_FLAG_FILTERING_PARAM) ? "" : "-",

  1123.                    opt->name);

  1124. 

  1125.         switch (opt->type) {

  1126.             case AV_OPT_TYPE_FLAGS:

  1127.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<flags>");

  1128.                 break;

  1129.             case AV_OPT_TYPE_INT:

  1130.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<int>");

  1131.                 break;

  1132.             case AV_OPT_TYPE_INT64:

  1133.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<int64>");

  1134.                 break;

  1135.             case AV_OPT_TYPE_UINT64:

  1136.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<uint64>");

  1137.                 break;

  1138.             case AV_OPT_TYPE_DOUBLE:

  1139.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<double>");

  1140.                 break;

  1141.             case AV_OPT_TYPE_FLOAT:

  1142.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<float>");

  1143.                 break;

  1144.             case AV_OPT_TYPE_STRING:

  1145.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<string>");

  1146.                 break;

  1147.             case AV_OPT_TYPE_RATIONAL:

  1148.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<rational>");

  1149.                 break;

  1150.             case AV_OPT_TYPE_BINARY:

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

  1152.                 break;

  1153.             case AV_OPT_TYPE_IMAGE_SIZE:

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

  1155.                 break;

  1156.             case AV_OPT_TYPE_VIDEO_RATE:

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

  1158.                 break;

  1159.             case AV_OPT_TYPE_PIXEL_FMT:

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

  1161.                 break;

  1162.             case AV_OPT_TYPE_SAMPLE_FMT:

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

  1164.                 break;

  1165.             case AV_OPT_TYPE_DURATION:

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

  1167.                 break;

  1168.             case AV_OPT_TYPE_COLOR:

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

  1170.                 break;

  1171.             case AV_OPT_TYPE_CHANNEL_LAYOUT:

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

  1173.                 break;

  1174.             case AV_OPT_TYPE_BOOL:

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

  1176.                 break;

  1177.             case AV_OPT_TYPE_CONST:

  1178.             default:

  1179.                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "");

  1180.                 break;

  1181.         }

  1182.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_ENCODING_PARAM) ? 'E' : '.');

  1183.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_DECODING_PARAM) ? 'D' : '.');

  1184.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_FILTERING_PARAM)? 'F' : '.');

  1185.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_VIDEO_PARAM   ) ? 'V' : '.');

  1186.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_AUDIO_PARAM   ) ? 'A' : '.');

  1187.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_SUBTITLE_PARAM) ? 'S' : '.');

  1188.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_EXPORT)         ? 'X' : '.');

  1189.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_READONLY)       ? 'R' : '.');

  1190.         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_BSF_PARAM)      ? 'B' : '.');

  1191. 

  1192.         if (opt->help)

  1193.             av_log(av_log_obj, AV_LOG_INFO, " %s", opt->help);

  1194. 

  1195.         if (av_opt_query_ranges(&r, obj, opt->name, AV_OPT_SEARCH_FAKE_OBJ) >= 0) {

  1196.             switch (opt->type) {

  1197.             case AV_OPT_TYPE_INT:

  1198.             case AV_OPT_TYPE_INT64:

  1199.             case AV_OPT_TYPE_UINT64:

  1200.             case AV_OPT_TYPE_DOUBLE:

  1201.             case AV_OPT_TYPE_FLOAT:

  1202.             case AV_OPT_TYPE_RATIONAL:

  1203.                 for (i = 0; i < r->nb_ranges; i++) {

  1204.                     av_log(av_log_obj, AV_LOG_INFO, " (from ");

  1205.                     log_value(av_log_obj, AV_LOG_INFO, r->range[i]->value_min);

  1206.                     av_log(av_log_obj, AV_LOG_INFO, " to ");

  1207.                     log_value(av_log_obj, AV_LOG_INFO, r->range[i]->value_max);

  1208.                     av_log(av_log_obj, AV_LOG_INFO, ")");

  1209.                 }

  1210.                 break;

  1211.             }

  1212.             av_opt_freep_ranges(&r);

  1213.         }

  1214. 

  1215.         if (opt->type != AV_OPT_TYPE_CONST  &&

  1216.             opt->type != AV_OPT_TYPE_BINARY &&

  1217.                 !((opt->type == AV_OPT_TYPE_COLOR      ||

  1218.                    opt->type == AV_OPT_TYPE_IMAGE_SIZE ||

  1219.                    opt->type == AV_OPT_TYPE_STRING     ||

  1220.                    opt->type == AV_OPT_TYPE_VIDEO_RATE) &&

  1221.                   !opt->default_val.str)) {

  1222.             av_log(av_log_obj, AV_LOG_INFO, " (default ");

  1223.             switch (opt->type) {

  1224.             case AV_OPT_TYPE_BOOL:

  1225.                 av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(get_bool_name(opt->default_val.i64), "invalid"));

  1226.                 break;

  1227.             case AV_OPT_TYPE_FLAGS: {

  1228.                 char *def_flags = get_opt_flags_string(obj, opt->unit, opt->default_val.i64);

  1229.                 if (def_flags) {

  1230.                     av_log(av_log_obj, AV_LOG_INFO, "%s", def_flags);

  1231.                     av_freep(&def_flags);

  1232.                 } else {

  1233.                     av_log(av_log_obj, AV_LOG_INFO, "%"PRIX64, opt->default_val.i64);

  1234.                 }

  1235.                 break;

  1236.             }

  1237.             case AV_OPT_TYPE_DURATION: {

  1238.                 char buf[25];

  1239.                 format_duration(buf, sizeof(buf), opt->default_val.i64);

  1240.                 av_log(av_log_obj, AV_LOG_INFO, "%s", buf);

  1241.                 break;

  1242.             }

  1243.             case AV_OPT_TYPE_INT:

  1244.             case AV_OPT_TYPE_UINT64:

  1245.             case AV_OPT_TYPE_INT64: {

  1246.                 const char *def_const = get_opt_const_name(obj, opt->unit, opt->default_val.i64);

  1247.                 if (def_const)

  1248.                     av_log(av_log_obj, AV_LOG_INFO, "%s", def_const);

  1249.                 else

  1250.                     log_value(av_log_obj, AV_LOG_INFO, opt->default_val.i64);

  1251.                 break;

  1252.             }

  1253.             case AV_OPT_TYPE_DOUBLE:

  1254.             case AV_OPT_TYPE_FLOAT:

  1255.                 log_value(av_log_obj, AV_LOG_INFO, opt->default_val.dbl);

  1256.                 break;

  1257.             case AV_OPT_TYPE_RATIONAL: {

  1258.                 AVRational q = av_d2q(opt->default_val.dbl, INT_MAX);

  1259.                 av_log(av_log_obj, AV_LOG_INFO, "%d/%d", q.num, q.den); }

  1260.                 break;

  1261.             case AV_OPT_TYPE_PIXEL_FMT:

  1262.                 av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(av_get_pix_fmt_name(opt->default_val.i64), "none"));

  1263.                 break;

  1264.             case AV_OPT_TYPE_SAMPLE_FMT:

  1265.                 av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(av_get_sample_fmt_name(opt->default_val.i64), "none"));

  1266.                 break;

  1267.             case AV_OPT_TYPE_COLOR:

  1268.             case AV_OPT_TYPE_IMAGE_SIZE:

  1269.             case AV_OPT_TYPE_STRING:

  1270.             case AV_OPT_TYPE_VIDEO_RATE:

  1271.                 av_log(av_log_obj, AV_LOG_INFO, "\"%s\"", opt->default_val.str);

  1272.                 break;

  1273.             case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1274.                 av_log(av_log_obj, AV_LOG_INFO, "0x%"PRIx64, opt->default_val.i64);

  1275.                 break;

  1276.             }

  1277.             av_log(av_log_obj, AV_LOG_INFO, ")");

  1278.         }

  1279. 

  1280.         av_log(av_log_obj, AV_LOG_INFO, "\n");

  1281.         if (opt->unit && opt->type != AV_OPT_TYPE_CONST)

  1282.             opt_list(obj, av_log_obj, opt->unit, req_flags, rej_flags);

  1283.     }

  1284. }

  1285. 

  1286. int av_opt_show2(void *obj, void *av_log_obj, int req_flags, int rej_flags)

  1287. {

  1288.     if (!obj)

  1289.         return -1;

  1290. 

  1291.     av_log(av_log_obj, AV_LOG_INFO, "%s AVOptions:\n", (*(AVClass **)obj)->class_name);

  1292. 

  1293.     opt_list(obj, av_log_obj, NULL, req_flags, rej_flags);

  1294. 

  1295.     return 0;

  1296. }

  1297. 

  1298. void av_opt_set_defaults(void *s)

  1299. {

  1300.     av_opt_set_defaults2(s, 0, 0);

  1301. }

  1302. 

  1303. void av_opt_set_defaults2(void *s, int mask, int flags)

  1304. {

  1305.     const AVOption *opt = NULL;

  1306.     while ((opt = av_opt_next(s, opt))) {

  1307.         void *dst = ((uint8_t*)s) + opt->offset;

  1308. 

  1309.         if ((opt->flags & mask) != flags)

  1310.             continue;

  1311. 

  1312.         if (opt->flags & AV_OPT_FLAG_READONLY)

  1313.             continue;

  1314. 

  1315.         switch (opt->type) {

  1316.             case AV_OPT_TYPE_CONST:

  1317.                 /* Nothing to be done here */

  1318.                 break;

  1319.             case AV_OPT_TYPE_BOOL:

  1320.             case AV_OPT_TYPE_FLAGS:

  1321.             case AV_OPT_TYPE_INT:

  1322.             case AV_OPT_TYPE_INT64:

  1323.             case AV_OPT_TYPE_UINT64:

  1324.             case AV_OPT_TYPE_DURATION:

  1325.             case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1326.             case AV_OPT_TYPE_PIXEL_FMT:

  1327.             case AV_OPT_TYPE_SAMPLE_FMT:

  1328.                 write_number(s, opt, dst, 1, 1, opt->default_val.i64);

  1329.                 break;

  1330.             case AV_OPT_TYPE_DOUBLE:

  1331.             case AV_OPT_TYPE_FLOAT: {

  1332.                 double val;

  1333.                 val = opt->default_val.dbl;

  1334.                 write_number(s, opt, dst, val, 1, 1);

  1335.             }

  1336.             break;

  1337.             case AV_OPT_TYPE_RATIONAL: {

  1338.                 AVRational val;

  1339.                 val = av_d2q(opt->default_val.dbl, INT_MAX);

  1340.                 write_number(s, opt, dst, 1, val.den, val.num);

  1341.             }

  1342.             break;

  1343.             case AV_OPT_TYPE_COLOR:

  1344.                 set_string_color(s, opt, opt->default_val.str, dst);

  1345.                 break;

  1346.             case AV_OPT_TYPE_STRING:

  1347.                 set_string(s, opt, opt->default_val.str, dst);

  1348.                 break;

  1349.             case AV_OPT_TYPE_IMAGE_SIZE:

  1350.                 set_string_image_size(s, opt, opt->default_val.str, dst);

  1351.                 break;

  1352.             case AV_OPT_TYPE_VIDEO_RATE:

  1353.                 set_string_video_rate(s, opt, opt->default_val.str, dst);

  1354.                 break;

  1355.             case AV_OPT_TYPE_BINARY:

  1356.                 set_string_binary(s, opt, opt->default_val.str, dst);

  1357.                 break;

  1358.             case AV_OPT_TYPE_DICT:

  1359.                 /* Cannot set defaults for these types */

  1360.             break;

  1361.         default:

  1362.             av_log(s, AV_LOG_DEBUG, "AVOption type %d of option %s not implemented yet\n",

  1363.                    opt->type, opt->name);

  1364.         }

  1365.     }

  1366. }

  1367. 

  1368. /**

  1369.  * Store the value in the field in ctx that is named like key.

  1370.  * ctx must be an AVClass context, storing is done using AVOptions.

  1371.  *

  1372.  * @param buf the string to parse, buf will be updated to point at the

  1373.  * separator just after the parsed key/value pair

  1374.  * @param key_val_sep a 0-terminated list of characters used to

  1375.  * separate key from value

  1376.  * @param pairs_sep a 0-terminated list of characters used to separate

  1377.  * two pairs from each other

  1378.  * @return 0 if the key/value pair has been successfully parsed and

  1379.  * set, or a negative value corresponding to an AVERROR code in case

  1380.  * of error:

  1381.  * AVERROR(EINVAL) if the key/value pair cannot be parsed,

  1382.  * the error code issued by av_opt_set() if the key/value pair

  1383.  * cannot be set

  1384.  */

  1385. static int parse_key_value_pair(void *ctx, const char **buf,

  1386.                                 const char *key_val_sep, const char *pairs_sep)

  1387. {

  1388.     char *key = av_get_token(buf, key_val_sep);

  1389.     char *val;

  1390.     int ret;

  1391. 

  1392.     if (!key)

  1393.         return AVERROR(ENOMEM);

  1394. 

  1395.     if (*key && strspn(*buf, key_val_sep)) {

  1396.         (*buf)++;

  1397.         val = av_get_token(buf, pairs_sep);

  1398.         if (!val) {

  1399.             av_freep(&key);

  1400.             return AVERROR(ENOMEM);

  1401.         }

  1402.     } else {

  1403.         av_log(ctx, AV_LOG_ERROR, "Missing key or no key/value separator found after key '%s'\n", key);

  1404.         av_free(key);

  1405.         return AVERROR(EINVAL);

  1406.     }

  1407. 

  1408.     av_log(ctx, AV_LOG_DEBUG, "Setting entry with key '%s' to value '%s'\n", key, val);

  1409. 

  1410.     ret = av_opt_set(ctx, key, val, AV_OPT_SEARCH_CHILDREN);

  1411.     if (ret == AVERROR_OPTION_NOT_FOUND)

  1412.         av_log(ctx, AV_LOG_ERROR, "Key '%s' not found.\n", key);

  1413. 

  1414.     av_free(key);

  1415.     av_free(val);

  1416.     return ret;

  1417. }

  1418. 

  1419. int av_set_options_string(void *ctx, const char *opts,

  1420.                           const char *key_val_sep, const char *pairs_sep)

  1421. {

  1422.     int ret, count = 0;

  1423. 

  1424.     if (!opts)

  1425.         return 0;

  1426. 

  1427.     while (*opts) {

  1428.         if ((ret = parse_key_value_pair(ctx, &opts, key_val_sep, pairs_sep)) < 0)

  1429.             return ret;

  1430.         count++;

  1431. 

  1432.         if (*opts)

  1433.             opts++;

  1434.     }

  1435. 

  1436.     return count;

  1437. }

  1438. 

  1439. #define WHITESPACES " \n\t\r"

  1440. 

  1441. static int is_key_char(char c)

  1442. {

  1443.     return (unsigned)((c | 32) - 'a') < 26 ||

  1444.            (unsigned)(c - '0') < 10 ||

  1445.            c == '-' || c == '_' || c == '/' || c == '.';

  1446. }

  1447. 

  1448. /**

  1449.  * Read a key from a string.

  1450.  *

  1451.  * The key consists of is_key_char characters and must be terminated by a

  1452.  * character from the delim string; spaces are ignored.

  1453.  *

  1454.  * @return  0 for success (even with ellipsis), <0 for failure

  1455.  */

  1456. static int get_key(const char **ropts, const char *delim, char **rkey)

  1457. {

  1458.     const char *opts = *ropts;

  1459.     const char *key_start, *key_end;

  1460. 

  1461.     key_start = opts += strspn(opts, WHITESPACES);

  1462.     while (is_key_char(*opts))

  1463.         opts++;

  1464.     key_end = opts;

  1465.     opts += strspn(opts, WHITESPACES);

  1466.     if (!*opts || !strchr(delim, *opts))

  1467.         return AVERROR(EINVAL);

  1468.     opts++;

  1469.     if (!(*rkey = av_malloc(key_end - key_start + 1)))

  1470.         return AVERROR(ENOMEM);

  1471.     memcpy(*rkey, key_start, key_end - key_start);

  1472.     (*rkey)[key_end - key_start] = 0;

  1473.     *ropts = opts;

  1474.     return 0;

  1475. }

  1476. 

  1477. int av_opt_get_key_value(const char **ropts,

  1478.                          const char *key_val_sep, const char *pairs_sep,

  1479.                          unsigned flags,

  1480.                          char **rkey, char **rval)

  1481. {

  1482.     int ret;

  1483.     char *key = NULL, *val;

  1484.     const char *opts = *ropts;

  1485. 

  1486.     if ((ret = get_key(&opts, key_val_sep, &key)) < 0 &&

  1487.         !(flags & AV_OPT_FLAG_IMPLICIT_KEY))

  1488.         return AVERROR(EINVAL);

  1489.     if (!(val = av_get_token(&opts, pairs_sep))) {

  1490.         av_free(key);

  1491.         return AVERROR(ENOMEM);

  1492.     }

  1493.     *ropts = opts;

  1494.     *rkey  = key;

  1495.     *rval  = val;

  1496.     return 0;

  1497. }

  1498. 

  1499. int av_opt_set_from_string(void *ctx, const char *opts,

  1500.                            const char *const *shorthand,

  1501.                            const char *key_val_sep, const char *pairs_sep)

  1502. {

  1503.     int ret, count = 0;

  1504.     const char *dummy_shorthand = NULL;

  1505.     char *av_uninit(parsed_key), *av_uninit(value);

  1506.     const char *key;

  1507. 

  1508.     if (!opts)

  1509.         return 0;

  1510.     if (!shorthand)

  1511.         shorthand = &dummy_shorthand;

  1512. 

  1513.     while (*opts) {

  1514.         ret = av_opt_get_key_value(&opts, key_val_sep, pairs_sep,

  1515.                                    *shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,

  1516.                                    &parsed_key, &value);

  1517.         if (ret < 0) {

  1518.             if (ret == AVERROR(EINVAL))

  1519.                 av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", opts);

  1520.             else

  1521.                 av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", opts,

  1522.                        av_err2str(ret));

  1523.             return ret;

  1524.         }

  1525.         if (*opts)

  1526.             opts++;

  1527.         if (parsed_key) {

  1528.             key = parsed_key;

  1529.             while (*shorthand) /* discard all remaining shorthand */

  1530.                 shorthand++;

  1531.         } else {

  1532.             key = *(shorthand++);

  1533.         }

  1534. 

  1535.         av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);

  1536.         if ((ret = av_opt_set(ctx, key, value, 0)) < 0) {

  1537.             if (ret == AVERROR_OPTION_NOT_FOUND)

  1538.                 av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);

  1539.             av_free(value);

  1540.             av_free(parsed_key);

  1541.             return ret;

  1542.         }

  1543. 

  1544.         av_free(value);

  1545.         av_free(parsed_key);

  1546.         count++;

  1547.     }

  1548.     return count;

  1549. }

  1550. 

  1551. void av_opt_free(void *obj)

  1552. {

  1553.     const AVOption *o = NULL;

  1554.     while ((o = av_opt_next(obj, o))) {

  1555.         switch (o->type) {

  1556.         case AV_OPT_TYPE_STRING:

  1557.         case AV_OPT_TYPE_BINARY:

  1558.             av_freep((uint8_t *)obj + o->offset);

  1559.             break;

  1560. 

  1561.         case AV_OPT_TYPE_DICT:

  1562.             av_dict_free((AVDictionary **)(((uint8_t *)obj) + o->offset));

  1563.             break;

  1564. 

  1565.         default:

  1566.             break;

  1567.         }

  1568.     }

  1569. }

  1570. 

  1571. int av_opt_set_dict2(void *obj, AVDictionary **options, int search_flags)

  1572. {

  1573.     AVDictionaryEntry *t = NULL;

  1574.     AVDictionary    *tmp = NULL;

  1575.     int ret = 0;

  1576. 

  1577.     if (!options)

  1578.         return 0;

  1579. 

  1580.     while ((t = av_dict_get(*options, "", t, AV_DICT_IGNORE_SUFFIX))) {

  1581.         ret = av_opt_set(obj, t->key, t->value, search_flags);

  1582.         if (ret == AVERROR_OPTION_NOT_FOUND)

  1583.             ret = av_dict_set(&tmp, t->key, t->value, 0);

  1584.         if (ret < 0) {

  1585.             av_log(obj, AV_LOG_ERROR, "Error setting option %s to value %s.\n", t->key, t->value);

  1586.             av_dict_free(&tmp);

  1587.             return ret;

  1588.         }

  1589.         ret = 0;

  1590.     }

  1591.     av_dict_free(options);

  1592.     *options = tmp;

  1593.     return ret;

  1594. }

  1595. 

  1596. int av_opt_set_dict(void *obj, AVDictionary **options)

  1597. {

  1598.     return av_opt_set_dict2(obj, options, 0);

  1599. }

  1600. 

  1601. const AVOption *av_opt_find(void *obj, const char *name, const char *unit,

  1602.                             int opt_flags, int search_flags)

  1603. {

  1604.     return av_opt_find2(obj, name, unit, opt_flags, search_flags, NULL);

  1605. }

  1606. 

  1607. const AVOption *av_opt_find2(void *obj, const char *name, const char *unit,

  1608.                              int opt_flags, int search_flags, void **target_obj)

  1609. {

  1610.     const AVClass  *c;

  1611.     const AVOption *o = NULL;

  1612. 

  1613.     if(!obj)

  1614.         return NULL;

  1615. 

  1616.     c= *(AVClass**)obj;

  1617. 

  1618.     if (!c)

  1619.         return NULL;

  1620. 

  1621.     if (search_flags & AV_OPT_SEARCH_CHILDREN) {

  1622.         if (search_flags & AV_OPT_SEARCH_FAKE_OBJ) {

  1623.             const AVClass *child = NULL;

  1624.             while (child = av_opt_child_class_next(c, child))

  1625.                 if (o = av_opt_find2(&child, name, unit, opt_flags, search_flags, NULL))

  1626.                     return o;

  1627.         } else {

  1628.             void *child = NULL;

  1629.             while (child = av_opt_child_next(obj, child))

  1630.                 if (o = av_opt_find2(child, name, unit, opt_flags, search_flags, target_obj))

  1631.                     return o;

  1632.         }

  1633.     }

  1634. 

  1635.     while (o = av_opt_next(obj, o)) {

  1636.         if (!strcmp(o->name, name) && (o->flags & opt_flags) == opt_flags &&

  1637.             ((!unit && o->type != AV_OPT_TYPE_CONST) ||

  1638.              (unit  && o->type == AV_OPT_TYPE_CONST && o->unit && !strcmp(o->unit, unit)))) {

  1639.             if (target_obj) {

  1640.                 if (!(search_flags & AV_OPT_SEARCH_FAKE_OBJ))

  1641.                     *target_obj = obj;

  1642.                 else

  1643.                     *target_obj = NULL;

  1644.             }

  1645.             return o;

  1646.         }

  1647.     }

  1648.     return NULL;

  1649. }

  1650. 

  1651. void *av_opt_child_next(void *obj, void *prev)

  1652. {

  1653.     const AVClass *c = *(AVClass **)obj;

  1654.     if (c->child_next)

  1655.         return c->child_next(obj, prev);

  1656.     return NULL;

  1657. }

  1658. 

  1659. const AVClass *av_opt_child_class_next(const AVClass *parent, const AVClass *prev)

  1660. {

  1661.     if (parent->child_class_next)

  1662.         return parent->child_class_next(prev);

  1663.     return NULL;

  1664. }

  1665. 

  1666. void *av_opt_ptr(const AVClass *class, void *obj, const char *name)

  1667. {

  1668.     const AVOption *opt= av_opt_find2(&class, name, NULL, 0, AV_OPT_SEARCH_FAKE_OBJ, NULL);

  1669.     if(!opt)

  1670.         return NULL;

  1671.     return (uint8_t*)obj + opt->offset;

  1672. }

  1673. 

  1674. static int opt_size(enum AVOptionType type)

  1675. {

  1676.     switch(type) {

  1677.     case AV_OPT_TYPE_BOOL:

  1678.     case AV_OPT_TYPE_INT:

  1679.     case AV_OPT_TYPE_FLAGS:

  1680.         return sizeof(int);

  1681.     case AV_OPT_TYPE_DURATION:

  1682.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1683.     case AV_OPT_TYPE_INT64:

  1684.     case AV_OPT_TYPE_UINT64:

  1685.         return sizeof(int64_t);

  1686.     case AV_OPT_TYPE_DOUBLE:

  1687.         return sizeof(double);

  1688.     case AV_OPT_TYPE_FLOAT:

  1689.         return sizeof(float);

  1690.     case AV_OPT_TYPE_STRING:

  1691.         return sizeof(uint8_t*);

  1692.     case AV_OPT_TYPE_VIDEO_RATE:

  1693.     case AV_OPT_TYPE_RATIONAL:

  1694.         return sizeof(AVRational);

  1695.     case AV_OPT_TYPE_BINARY:

  1696.         return sizeof(uint8_t*) + sizeof(int);

  1697.     case AV_OPT_TYPE_IMAGE_SIZE:

  1698.         return sizeof(int[2]);

  1699.     case AV_OPT_TYPE_PIXEL_FMT:

  1700.         return sizeof(enum AVPixelFormat);

  1701.     case AV_OPT_TYPE_SAMPLE_FMT:

  1702.         return sizeof(enum AVSampleFormat);

  1703.     case AV_OPT_TYPE_COLOR:

  1704.         return 4;

  1705.     }

  1706.     return AVERROR(EINVAL);

  1707. }

  1708. 

  1709. int av_opt_copy(void *dst, const void *src)

  1710. {

  1711.     const AVOption *o = NULL;

  1712.     const AVClass *c;

  1713.     int ret = 0;

  1714. 

  1715.     if (!src)

  1716.         return AVERROR(EINVAL);

  1717. 

  1718.     c = *(AVClass **)src;

  1719.     if (!c || c != *(AVClass **)dst)

  1720.         return AVERROR(EINVAL);

  1721. 

  1722.     while ((o = av_opt_next(src, o))) {

  1723.         void *field_dst = (uint8_t *)dst + o->offset;

  1724.         void *field_src = (uint8_t *)src + o->offset;

  1725.         uint8_t **field_dst8 = (uint8_t **)field_dst;

  1726.         uint8_t **field_src8 = (uint8_t **)field_src;

  1727. 

  1728.         if (o->type == AV_OPT_TYPE_STRING) {

  1729.             if (*field_dst8 != *field_src8)

  1730.                 av_freep(field_dst8);

  1731.             *field_dst8 = av_strdup(*field_src8);

  1732.             if (*field_src8 && !*field_dst8)

  1733.                 ret = AVERROR(ENOMEM);

  1734.         } else if (o->type == AV_OPT_TYPE_BINARY) {

  1735.             int len = *(int *)(field_src8 + 1);

  1736.             if (*field_dst8 != *field_src8)

  1737.                 av_freep(field_dst8);

  1738.             *field_dst8 = av_memdup(*field_src8, len);

  1739.             if (len && !*field_dst8) {

  1740.                 ret = AVERROR(ENOMEM);

  1741.                 len = 0;

  1742.             }

  1743.             *(int *)(field_dst8 + 1) = len;

  1744.         } else if (o->type == AV_OPT_TYPE_CONST) {

  1745.             // do nothing

  1746.         } else if (o->type == AV_OPT_TYPE_DICT) {

  1747.             AVDictionary **sdict = (AVDictionary **) field_src;

  1748.             AVDictionary **ddict = (AVDictionary **) field_dst;

  1749.             if (*sdict != *ddict)

  1750.                 av_dict_free(ddict);

  1751.             *ddict = NULL;

  1752.             av_dict_copy(ddict, *sdict, 0);

  1753.             if (av_dict_count(*sdict) != av_dict_count(*ddict))

  1754.                 ret = AVERROR(ENOMEM);

  1755.         } else {

  1756.             int size = opt_size(o->type);

  1757.             if (size < 0)

  1758.                 ret = size;

  1759.             else

  1760.                 memcpy(field_dst, field_src, size);

  1761.         }

  1762.     }

  1763.     return ret;

  1764. }

  1765. 

  1766. int av_opt_query_ranges(AVOptionRanges **ranges_arg, void *obj, const char *key, int flags)

  1767. {

  1768.     int ret;

  1769.     const AVClass *c = *(AVClass**)obj;

  1770.     int (*callback)(AVOptionRanges **, void *obj, const char *key, int flags) = NULL;

  1771. 

  1772.     if (c->version > (52 << 16 | 11 << 8))

  1773.         callback = c->query_ranges;

  1774. 

  1775.     if (!callback)

  1776.         callback = av_opt_query_ranges_default;

  1777. 

  1778.     ret = callback(ranges_arg, obj, key, flags);

  1779.     if (ret >= 0) {

  1780.         if (!(flags & AV_OPT_MULTI_COMPONENT_RANGE))

  1781.             ret = 1;

  1782.         (*ranges_arg)->nb_components = ret;

  1783.     }

  1784.     return ret;

  1785. }

  1786. 

  1787. int av_opt_query_ranges_default(AVOptionRanges **ranges_arg, void *obj, const char *key, int flags)

  1788. {

  1789.     AVOptionRanges *ranges = av_mallocz(sizeof(*ranges));

  1790.     AVOptionRange **range_array = av_mallocz(sizeof(void*));

  1791.     AVOptionRange *range = av_mallocz(sizeof(*range));

  1792.     const AVOption *field = av_opt_find(obj, key, NULL, 0, flags);

  1793.     int ret;

  1794. 

  1795.     *ranges_arg = NULL;

  1796. 

  1797.     if (!ranges || !range || !range_array || !field) {

  1798.         ret = AVERROR(ENOMEM);

  1799.         goto fail;

  1800.     }

  1801. 

  1802.     ranges->range = range_array;

  1803.     ranges->range[0] = range;

  1804.     ranges->nb_ranges = 1;

  1805.     ranges->nb_components = 1;

  1806.     range->is_range = 1;

  1807.     range->value_min = field->min;

  1808.     range->value_max = field->max;

  1809. 

  1810.     switch (field->type) {

  1811.     case AV_OPT_TYPE_BOOL:

  1812.     case AV_OPT_TYPE_INT:

  1813.     case AV_OPT_TYPE_INT64:

  1814.     case AV_OPT_TYPE_UINT64:

  1815.     case AV_OPT_TYPE_PIXEL_FMT:

  1816.     case AV_OPT_TYPE_SAMPLE_FMT:

  1817.     case AV_OPT_TYPE_FLOAT:

  1818.     case AV_OPT_TYPE_DOUBLE:

  1819.     case AV_OPT_TYPE_DURATION:

  1820.     case AV_OPT_TYPE_COLOR:

  1821.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1822.         break;

  1823.     case AV_OPT_TYPE_STRING:

  1824.         range->component_min = 0;

  1825.         range->component_max = 0x10FFFF; // max unicode value

  1826.         range->value_min = -1;

  1827.         range->value_max = INT_MAX;

  1828.         break;

  1829.     case AV_OPT_TYPE_RATIONAL:

  1830.         range->component_min = INT_MIN;

  1831.         range->component_max = INT_MAX;

  1832.         break;

  1833.     case AV_OPT_TYPE_IMAGE_SIZE:

  1834.         range->component_min = 0;

  1835.         range->component_max = INT_MAX/128/8;

  1836.         range->value_min = 0;

  1837.         range->value_max = INT_MAX/8;

  1838.         break;

  1839.     case AV_OPT_TYPE_VIDEO_RATE:

  1840.         range->component_min = 1;

  1841.         range->component_max = INT_MAX;

  1842.         range->value_min = 1;

  1843.         range->value_max = INT_MAX;

  1844.         break;

  1845.     default:

  1846.         ret = AVERROR(ENOSYS);

  1847.         goto fail;

  1848.     }

  1849. 

  1850.     *ranges_arg = ranges;

  1851.     return 1;

  1852. fail:

  1853.     av_free(ranges);

  1854.     av_free(range);

  1855.     av_free(range_array);

  1856.     return ret;

  1857. }

  1858. 

  1859. void av_opt_freep_ranges(AVOptionRanges **rangesp)

  1860. {

  1861.     int i;

  1862.     AVOptionRanges *ranges = *rangesp;

  1863. 

  1864.     if (!ranges)

  1865.         return;

  1866. 

  1867.     for (i = 0; i < ranges->nb_ranges * ranges->nb_components; i++) {

  1868.         AVOptionRange *range = ranges->range[i];

  1869.         if (range) {

  1870.             av_freep(&range->str);

  1871.             av_freep(&ranges->range[i]);

  1872.         }

  1873.     }

  1874.     av_freep(&ranges->range);

  1875.     av_freep(rangesp);

  1876. }

  1877. 

  1878. int av_opt_is_set_to_default(void *obj, const AVOption *o)

  1879. {

  1880.     int64_t i64;

  1881.     double d, d2;

  1882.     float f;

  1883.     AVRational q;

  1884.     int ret, w, h;

  1885.     char *str;

  1886.     void *dst;

  1887. 

  1888.     if (!o || !obj)

  1889.         return AVERROR(EINVAL);

  1890. 

  1891.     dst = ((uint8_t*)obj) + o->offset;

  1892. 

  1893.     switch (o->type) {

  1894.     case AV_OPT_TYPE_CONST:

  1895.         return 1;

  1896.     case AV_OPT_TYPE_BOOL:

  1897.     case AV_OPT_TYPE_FLAGS:

  1898.     case AV_OPT_TYPE_PIXEL_FMT:

  1899.     case AV_OPT_TYPE_SAMPLE_FMT:

  1900.     case AV_OPT_TYPE_INT:

  1901.     case AV_OPT_TYPE_CHANNEL_LAYOUT:

  1902.     case AV_OPT_TYPE_DURATION:

  1903.     case AV_OPT_TYPE_INT64:

  1904.     case AV_OPT_TYPE_UINT64:

  1905.         read_number(o, dst, NULL, NULL, &i64);

  1906.         return o->default_val.i64 == i64;

  1907.     case AV_OPT_TYPE_STRING:

  1908.         str = *(char **)dst;

  1909.         if (str == o->default_val.str) //2 NULLs

  1910.             return 1;

  1911.         if (!str || !o->default_val.str) //1 NULL

  1912.             return 0;

  1913.         return !strcmp(str, o->default_val.str);

  1914.     case AV_OPT_TYPE_DOUBLE:

  1915.         read_number(o, dst, &d, NULL, NULL);

  1916.         return o->default_val.dbl == d;

  1917.     case AV_OPT_TYPE_FLOAT:

  1918.         read_number(o, dst, &d, NULL, NULL);

  1919.         f = o->default_val.dbl;

  1920.         d2 = f;

  1921.         return d2 == d;

  1922.     case AV_OPT_TYPE_RATIONAL:

  1923.         q = av_d2q(o->default_val.dbl, INT_MAX);

  1924.         return !av_cmp_q(*(AVRational*)dst, q);

  1925.     case AV_OPT_TYPE_BINARY: {

  1926.         struct {

  1927.             uint8_t *data;

  1928.             int size;

  1929.         } tmp = {0};

  1930.         int opt_size = *(int *)((void **)dst + 1);

  1931.         void *opt_ptr = *(void **)dst;

  1932.         if (!opt_size && (!o->default_val.str || !strlen(o->default_val.str)))

  1933.             return 1;

  1934.         if (!opt_size ||  !o->default_val.str || !strlen(o->default_val.str ))

  1935.             return 0;

  1936.         if (opt_size != strlen(o->default_val.str) / 2)

  1937.             return 0;

  1938.         ret = set_string_binary(NULL, NULL, o->default_val.str, &tmp.data);

  1939.         if (!ret)

  1940.             ret = !memcmp(opt_ptr, tmp.data, tmp.size);

  1941.         av_free(tmp.data);

  1942.         return ret;

  1943.     }

  1944.     case AV_OPT_TYPE_DICT:

  1945.         /* Binary and dict have not default support yet. Any pointer is not default. */

  1946.         return !!(*(void **)dst);

  1947.     case AV_OPT_TYPE_IMAGE_SIZE:

  1948.         if (!o->default_val.str || !strcmp(o->default_val.str, "none"))

  1949.             w = h = 0;

  1950.         else if ((ret = av_parse_video_size(&w, &h, o->default_val.str)) < 0)

  1951.             return ret;

  1952.         return (w == *(int *)dst) && (h == *((int *)dst+1));

  1953.     case AV_OPT_TYPE_VIDEO_RATE:

  1954.         q = (AVRational){0, 0};

  1955.         if (o->default_val.str) {

  1956.             if ((ret = av_parse_video_rate(&q, o->default_val.str)) < 0)

  1957.                 return ret;

  1958.         }

  1959.         return !av_cmp_q(*(AVRational*)dst, q);

  1960.     case AV_OPT_TYPE_COLOR: {

  1961.         uint8_t color[4] = {0, 0, 0, 0};

  1962.         if (o->default_val.str) {

  1963.             if ((ret = av_parse_color(color, o->default_val.str, -1, NULL)) < 0)

  1964.                 return ret;

  1965.         }

  1966.         return !memcmp(color, dst, sizeof(color));

  1967.     }

  1968.     default:

  1969.         av_log(obj, AV_LOG_WARNING, "Not supported option type: %d, option name: %s\n", o->type, o->name);

  1970.         break;

  1971.     }

  1972.     return AVERROR_PATCHWELCOME;

  1973. }

  1974. 

  1975. int av_opt_is_set_to_default_by_name(void *obj, const char *name, int search_flags)

  1976. {

  1977.     const AVOption *o;

  1978.     void *target;

  1979.     if (!obj)

  1980.         return AVERROR(EINVAL);

  1981.     o = av_opt_find2(obj, name, NULL, 0, search_flags, &target);

  1982.     if (!o)

  1983.         return AVERROR_OPTION_NOT_FOUND;

  1984.     return av_opt_is_set_to_default(target, o);

  1985. }

  1986. 

  1987. int av_opt_serialize(void *obj, int opt_flags, int flags, char **buffer,

  1988.                      const char key_val_sep, const char pairs_sep)

  1989. {

  1990.     const AVOption *o = NULL;

  1991.     uint8_t *buf;

  1992.     AVBPrint bprint;

  1993.     int ret, cnt = 0;

  1994.     const char special_chars[] = {pairs_sep, key_val_sep, '\0'};

  1995. 

  1996.     if (pairs_sep == '\0' || key_val_sep == '\0' || pairs_sep == key_val_sep ||

  1997.         pairs_sep == '\\' || key_val_sep == '\\') {

  1998.         av_log(obj, AV_LOG_ERROR, "Invalid separator(s) found.");

  1999.         return AVERROR(EINVAL);

  2000.     }

  2001. 

  2002.     if (!obj || !buffer)

  2003.         return AVERROR(EINVAL);

  2004. 

  2005.     *buffer = NULL;

  2006.     av_bprint_init(&bprint, 64, AV_BPRINT_SIZE_UNLIMITED);

  2007. 

  2008.     while (o = av_opt_next(obj, o)) {

  2009.         if (o->type == AV_OPT_TYPE_CONST)

  2010.             continue;

  2011.         if ((flags & AV_OPT_SERIALIZE_OPT_FLAGS_EXACT) && o->flags != opt_flags)

  2012.             continue;

  2013.         else if (((o->flags & opt_flags) != opt_flags))

  2014.             continue;

  2015.         if (flags & AV_OPT_SERIALIZE_SKIP_DEFAULTS && av_opt_is_set_to_default(obj, o) > 0)

  2016.             continue;

  2017.         if ((ret = av_opt_get(obj, o->name, 0, &buf)) < 0) {

  2018.             av_bprint_finalize(&bprint, NULL);

  2019.             return ret;

  2020.         }

  2021.         if (buf) {

  2022.             if (cnt++)

  2023.                 av_bprint_append_data(&bprint, &pairs_sep, 1);

  2024.             av_bprint_escape(&bprint, o->name, special_chars, AV_ESCAPE_MODE_BACKSLASH, 0);

  2025.             av_bprint_append_data(&bprint, &key_val_sep, 1);

  2026.             av_bprint_escape(&bprint, buf, special_chars, AV_ESCAPE_MODE_BACKSLASH, 0);

  2027.             av_freep(&buf);

  2028.         }

  2029.     }

  2030.     av_bprint_finalize(&bprint, buffer);

  2031.     return 0;

  2032. }