3 * Copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at>
5 * This file is part of FFmpeg.
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.
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.
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
25 * @author Michael Niedermayer <michaelni@gmx.at>
34 #include "parseutils.h"
38 //FIXME order them and do a bin search
39 const AVOption *av_find_opt(void *v, const char *name, const char *unit, int mask, int flags)
41 const AVOption *o = NULL;
43 while ((o = av_next_option(v, o))) {
44 if (!strcmp(o->name, name) && (!unit || (o->unit && !strcmp(o->unit, unit))) && (o->flags & mask) == flags)
51 #if FF_API_OLD_AVOPTIONS
52 const AVOption *av_next_option(void *obj, const AVOption *last)
54 return av_opt_next(obj, last);
58 const AVOption *av_opt_next(void *obj, const AVOption *last)
60 AVClass *class = *(AVClass**)obj;
61 if (!last && class->option[0].name) return class->option;
62 if (last && last[1].name) return ++last;
66 static int read_number(const AVOption *o, void *dst, double *num, int *den, int64_t *intnum)
69 case AV_OPT_TYPE_FLAGS: *intnum = *(unsigned int*)dst;return 0;
70 case AV_OPT_TYPE_INT: *intnum = *(int *)dst;return 0;
71 case AV_OPT_TYPE_INT64: *intnum = *(int64_t *)dst;return 0;
72 case AV_OPT_TYPE_FLOAT: *num = *(float *)dst;return 0;
73 case AV_OPT_TYPE_DOUBLE: *num = *(double *)dst;return 0;
74 case AV_OPT_TYPE_RATIONAL: *intnum = ((AVRational*)dst)->num;
75 *den = ((AVRational*)dst)->den;
77 case AV_OPT_TYPE_CONST: *num = o->default_val.dbl; return 0;
79 return AVERROR(EINVAL);
82 static int write_number(void *obj, const AVOption *o, void *dst, double num, int den, int64_t intnum)
84 if (o->max*den < num*intnum || o->min*den > num*intnum) {
85 av_log(obj, AV_LOG_ERROR, "Value %f for parameter '%s' out of range\n",
86 num*intnum/den, o->name);
87 return AVERROR(ERANGE);
91 case AV_OPT_TYPE_FLAGS:
92 case AV_OPT_TYPE_INT: *(int *)dst= llrint(num/den)*intnum; break;
93 case AV_OPT_TYPE_INT64: *(int64_t *)dst= llrint(num/den)*intnum; break;
94 case AV_OPT_TYPE_FLOAT: *(float *)dst= num*intnum/den; break;
95 case AV_OPT_TYPE_DOUBLE:*(double *)dst= num*intnum/den; break;
96 case AV_OPT_TYPE_RATIONAL:
97 if ((int)num == num) *(AVRational*)dst= (AVRational){num*intnum, den};
98 else *(AVRational*)dst= av_d2q(num*intnum/den, 1<<24);
101 return AVERROR(EINVAL);
106 static const double const_values[] = {
113 static const char * const const_names[] = {
120 static int hexchar2int(char c) {
121 if (c >= '0' && c <= '9') return c - '0';
122 if (c >= 'a' && c <= 'f') return c - 'a' + 10;
123 if (c >= 'A' && c <= 'F') return c - 'A' + 10;
127 static int set_string_binary(void *obj, const AVOption *o, const char *val, uint8_t **dst)
129 int *lendst = (int *)(dst + 1);
131 int len = strlen(val);
137 return AVERROR(EINVAL);
140 ptr = bin = av_malloc(len);
142 int a = hexchar2int(*val++);
143 int b = hexchar2int(*val++);
144 if (a < 0 || b < 0) {
146 return AVERROR(EINVAL);
148 *ptr++ = (a << 4) | b;
156 static int set_string(void *obj, const AVOption *o, const char *val, uint8_t **dst)
159 *dst = av_strdup(val);
163 static int set_string_number(void *obj, const AVOption *o, const char *val, void *dst)
165 int ret = 0, notfirst = 0;
173 if (*val == '+' || *val == '-')
176 for (i = 0; i < sizeof(buf) - 1 && val[i] && val[i] != '+' && val[i] != '-'; i++)
181 const AVOption *o_named = av_opt_find(obj, buf, o->unit, 0, 0);
182 if (o_named && o_named->type == AV_OPT_TYPE_CONST)
183 d = o_named->default_val.dbl;
184 else if (!strcmp(buf, "default")) d = o->default_val.dbl;
185 else if (!strcmp(buf, "max" )) d = o->max;
186 else if (!strcmp(buf, "min" )) d = o->min;
187 else if (!strcmp(buf, "none" )) d = 0;
188 else if (!strcmp(buf, "all" )) d = ~0;
190 int res = av_expr_parse_and_eval(&d, buf, const_names, const_values, NULL, NULL, NULL, NULL, NULL, 0, obj);
192 av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\"\n", val);
197 if (o->type == AV_OPT_TYPE_FLAGS) {
198 read_number(o, dst, NULL, NULL, &intnum);
199 if (cmd == '+') d = intnum | (int64_t)d;
200 else if (cmd == '-') d = intnum &~(int64_t)d;
202 read_number(o, dst, &num, &den, &intnum);
203 if (cmd == '+') d = notfirst*num*intnum/den + d;
204 else if (cmd == '-') d = notfirst*num*intnum/den - d;
207 if ((ret = write_number(obj, o, dst, d, 1, 1)) < 0)
218 #if FF_API_OLD_AVOPTIONS
219 int av_set_string3(void *obj, const char *name, const char *val, int alloc, const AVOption **o_out)
221 const AVOption *o = av_opt_find(obj, name, NULL, 0, 0);
224 return av_opt_set(obj, name, val, 0);
228 int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
231 void *dst, *target_obj;
232 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
233 if (!o || !target_obj)
234 return AVERROR_OPTION_NOT_FOUND;
235 if (!val && o->type != AV_OPT_TYPE_STRING)
236 return AVERROR(EINVAL);
238 dst = ((uint8_t*)target_obj) + o->offset;
240 case AV_OPT_TYPE_STRING: return set_string(obj, o, val, dst);
241 case AV_OPT_TYPE_BINARY: return set_string_binary(obj, o, val, dst);
242 case AV_OPT_TYPE_FLAGS:
243 case AV_OPT_TYPE_INT:
244 case AV_OPT_TYPE_INT64:
245 case AV_OPT_TYPE_FLOAT:
246 case AV_OPT_TYPE_DOUBLE:
247 case AV_OPT_TYPE_RATIONAL: return set_string_number(obj, o, val, dst);
248 case AV_OPT_TYPE_IMAGE_SIZE:
249 ret = av_parse_video_size(dst, ((int *)dst) + 1, val);
251 av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as image size\n", val);
253 case AV_OPT_TYPE_PIXEL_FMT:
254 ret = av_get_pix_fmt(val);
255 if (ret == PIX_FMT_NONE) {
257 ret = strtol(val, &tail, 0);
258 if (*tail || (unsigned)ret >= PIX_FMT_NB) {
259 av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as pixel format\n", val);
260 return AVERROR(EINVAL);
263 *(enum PixelFormat *)dst = ret;
267 av_log(obj, AV_LOG_ERROR, "Invalid option type.\n");
268 return AVERROR(EINVAL);
271 #define OPT_EVAL_NUMBER(name, opttype, vartype)\
272 int av_opt_eval_ ## name(void *obj, const AVOption *o, const char *val, vartype *name ## _out)\
274 if (!o || o->type != opttype)\
275 return AVERROR(EINVAL);\
276 return set_string_number(obj, o, val, name ## _out);\
279 OPT_EVAL_NUMBER(flags, AV_OPT_TYPE_FLAGS, int)
280 OPT_EVAL_NUMBER(int, AV_OPT_TYPE_INT, int)
281 OPT_EVAL_NUMBER(int64, AV_OPT_TYPE_INT64, int64_t)
282 OPT_EVAL_NUMBER(float, AV_OPT_TYPE_FLOAT, float)
283 OPT_EVAL_NUMBER(double, AV_OPT_TYPE_DOUBLE, double)
284 OPT_EVAL_NUMBER(q, AV_OPT_TYPE_RATIONAL, AVRational)
286 static int set_number(void *obj, const char *name, double num, int den, int64_t intnum,
289 void *dst, *target_obj;
290 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
292 if (!o || !target_obj)
293 return AVERROR_OPTION_NOT_FOUND;
295 dst = ((uint8_t*)target_obj) + o->offset;
296 return write_number(obj, o, dst, num, den, intnum);
299 #if FF_API_OLD_AVOPTIONS
300 const AVOption *av_set_double(void *obj, const char *name, double n)
302 const AVOption *o = av_opt_find(obj, name, NULL, 0, 0);
303 if (set_number(obj, name, n, 1, 1, 0) < 0)
308 const AVOption *av_set_q(void *obj, const char *name, AVRational n)
310 const AVOption *o = av_opt_find(obj, name, NULL, 0, 0);
311 if (set_number(obj, name, n.num, n.den, 1, 0) < 0)
316 const AVOption *av_set_int(void *obj, const char *name, int64_t n)
318 const AVOption *o = av_opt_find(obj, name, NULL, 0, 0);
319 if (set_number(obj, name, 1, 1, n, 0) < 0)
325 int av_opt_set_int(void *obj, const char *name, int64_t val, int search_flags)
327 return set_number(obj, name, 1, 1, val, search_flags);
330 int av_opt_set_double(void *obj, const char *name, double val, int search_flags)
332 return set_number(obj, name, val, 1, 1, search_flags);
335 int av_opt_set_q(void *obj, const char *name, AVRational val, int search_flags)
337 return set_number(obj, name, val.num, val.den, 1, search_flags);
340 int av_opt_set_bin(void *obj, const char *name, const uint8_t *val, int len, int search_flags)
343 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
348 if (!o || !target_obj)
349 return AVERROR_OPTION_NOT_FOUND;
351 if (o->type != AV_OPT_TYPE_BINARY)
352 return AVERROR(EINVAL);
354 ptr = av_malloc(len);
356 return AVERROR(ENOMEM);
358 dst = (uint8_t **)(((uint8_t *)target_obj) + o->offset);
359 lendst = (int *)(dst + 1);
364 memcpy(ptr, val, len);
369 #if FF_API_OLD_AVOPTIONS
372 * @param buf a buffer which is used for returning non string values as strings, can be NULL
373 * @param buf_len allocated length in bytes of buf
375 const char *av_get_string(void *obj, const char *name, const AVOption **o_out, char *buf, int buf_len)
377 const AVOption *o = av_opt_find(obj, name, NULL, 0, AV_OPT_SEARCH_CHILDREN);
383 if (o->type != AV_OPT_TYPE_STRING && (!buf || !buf_len))
386 dst= ((uint8_t*)obj) + o->offset;
387 if (o_out) *o_out= o;
390 case AV_OPT_TYPE_FLAGS: snprintf(buf, buf_len, "0x%08X",*(int *)dst);break;
391 case AV_OPT_TYPE_INT: snprintf(buf, buf_len, "%d" , *(int *)dst);break;
392 case AV_OPT_TYPE_INT64: snprintf(buf, buf_len, "%"PRId64, *(int64_t*)dst);break;
393 case AV_OPT_TYPE_FLOAT: snprintf(buf, buf_len, "%f" , *(float *)dst);break;
394 case AV_OPT_TYPE_DOUBLE: snprintf(buf, buf_len, "%f" , *(double *)dst);break;
395 case AV_OPT_TYPE_RATIONAL: snprintf(buf, buf_len, "%d/%d", ((AVRational*)dst)->num, ((AVRational*)dst)->den);break;
396 case AV_OPT_TYPE_CONST: snprintf(buf, buf_len, "%f" , o->default_val.dbl);break;
397 case AV_OPT_TYPE_STRING: return *(void**)dst;
398 case AV_OPT_TYPE_BINARY:
399 len = *(int*)(((uint8_t *)dst) + sizeof(uint8_t *));
400 if (len >= (buf_len + 1)/2) return NULL;
401 bin = *(uint8_t**)dst;
402 for (i = 0; i < len; i++) snprintf(buf + i*2, 3, "%02X", bin[i]);
404 default: return NULL;
410 int av_opt_get(void *obj, const char *name, int search_flags, uint8_t **out_val)
412 void *dst, *target_obj;
413 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
414 uint8_t *bin, buf[128];
417 if (!o || !target_obj || (o->offset<=0 && o->type != AV_OPT_TYPE_CONST))
418 return AVERROR_OPTION_NOT_FOUND;
420 dst = (uint8_t*)target_obj + o->offset;
424 case AV_OPT_TYPE_FLAGS: ret = snprintf(buf, sizeof(buf), "0x%08X", *(int *)dst);break;
425 case AV_OPT_TYPE_INT: ret = snprintf(buf, sizeof(buf), "%d" , *(int *)dst);break;
426 case AV_OPT_TYPE_INT64: ret = snprintf(buf, sizeof(buf), "%"PRId64, *(int64_t*)dst);break;
427 case AV_OPT_TYPE_FLOAT: ret = snprintf(buf, sizeof(buf), "%f" , *(float *)dst);break;
428 case AV_OPT_TYPE_DOUBLE: ret = snprintf(buf, sizeof(buf), "%f" , *(double *)dst);break;
429 case AV_OPT_TYPE_RATIONAL: ret = snprintf(buf, sizeof(buf), "%d/%d", ((AVRational*)dst)->num, ((AVRational*)dst)->den);break;
430 case AV_OPT_TYPE_CONST: ret = snprintf(buf, sizeof(buf), "%f" , o->default_val.dbl);break;
431 case AV_OPT_TYPE_STRING:
433 *out_val = av_strdup(*(uint8_t**)dst);
435 *out_val = av_strdup("");
437 case AV_OPT_TYPE_BINARY:
438 len = *(int*)(((uint8_t *)dst) + sizeof(uint8_t *));
439 if ((uint64_t)len*2 + 1 > INT_MAX)
440 return AVERROR(EINVAL);
441 if (!(*out_val = av_malloc(len*2 + 1)))
442 return AVERROR(ENOMEM);
443 bin = *(uint8_t**)dst;
444 for (i = 0; i < len; i++)
445 snprintf(*out_val + i*2, 3, "%02X", bin[i]);
447 case AV_OPT_TYPE_IMAGE_SIZE:
448 ret = snprintf(buf, sizeof(buf), "%dx%d", ((int *)dst)[0], ((int *)dst)[1]);
450 case AV_OPT_TYPE_PIXEL_FMT:
451 ret = snprintf(buf, sizeof(buf), "%s", (char *)av_x_if_null(av_get_pix_fmt_name(*(enum PixelFormat *)dst), "?"));
454 return AVERROR(EINVAL);
457 if (ret >= sizeof(buf))
458 return AVERROR(EINVAL);
459 *out_val = av_strdup(buf);
463 static int get_number(void *obj, const char *name, const AVOption **o_out, double *num, int *den, int64_t *intnum,
466 void *dst, *target_obj;
467 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
468 if (!o || !target_obj)
471 dst = ((uint8_t*)target_obj) + o->offset;
473 if (o_out) *o_out= o;
475 return read_number(o, dst, num, den, intnum);
482 #if FF_API_OLD_AVOPTIONS
483 double av_get_double(void *obj, const char *name, const AVOption **o_out)
489 if (get_number(obj, name, o_out, &num, &den, &intnum, 0) < 0)
491 return num*intnum/den;
494 AVRational av_get_q(void *obj, const char *name, const AVOption **o_out)
500 if (get_number(obj, name, o_out, &num, &den, &intnum, 0) < 0)
501 return (AVRational){0, 0};
502 if (num == 1.0 && (int)intnum == intnum)
503 return (AVRational){intnum, den};
505 return av_d2q(num*intnum/den, 1<<24);
508 int64_t av_get_int(void *obj, const char *name, const AVOption **o_out)
514 if (get_number(obj, name, o_out, &num, &den, &intnum, 0) < 0)
516 return num*intnum/den;
520 int av_opt_get_int(void *obj, const char *name, int search_flags, int64_t *out_val)
526 if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0)
528 *out_val = num*intnum/den;
532 int av_opt_get_double(void *obj, const char *name, int search_flags, double *out_val)
538 if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0)
540 *out_val = num*intnum/den;
544 int av_opt_get_q(void *obj, const char *name, int search_flags, AVRational *out_val)
550 if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0)
553 if (num == 1.0 && (int)intnum == intnum)
554 *out_val = (AVRational){intnum, den};
556 *out_val = av_d2q(num*intnum/den, 1<<24);
560 int av_opt_flag_is_set(void *obj, const char *field_name, const char *flag_name)
562 const AVOption *field = av_opt_find(obj, field_name, NULL, 0, 0);
563 const AVOption *flag = av_opt_find(obj, flag_name,
564 field ? field->unit : NULL, 0, 0);
567 if (!field || !flag || flag->type != AV_OPT_TYPE_CONST ||
568 av_opt_get_int(obj, field_name, 0, &res) < 0)
570 return res & (int) flag->default_val.dbl;
573 static void opt_list(void *obj, void *av_log_obj, const char *unit,
574 int req_flags, int rej_flags)
576 const AVOption *opt=NULL;
578 while ((opt = av_opt_next(obj, opt))) {
579 if (!(opt->flags & req_flags) || (opt->flags & rej_flags))
582 /* Don't print CONST's on level one.
583 * Don't print anything but CONST's on level two.
584 * Only print items from the requested unit.
586 if (!unit && opt->type==AV_OPT_TYPE_CONST)
588 else if (unit && opt->type!=AV_OPT_TYPE_CONST)
590 else if (unit && opt->type==AV_OPT_TYPE_CONST && strcmp(unit, opt->unit))
592 else if (unit && opt->type == AV_OPT_TYPE_CONST)
593 av_log(av_log_obj, AV_LOG_INFO, " %-15s ", opt->name);
595 av_log(av_log_obj, AV_LOG_INFO, "-%-17s ", opt->name);
598 case AV_OPT_TYPE_FLAGS:
599 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<flags>");
601 case AV_OPT_TYPE_INT:
602 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<int>");
604 case AV_OPT_TYPE_INT64:
605 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<int64>");
607 case AV_OPT_TYPE_DOUBLE:
608 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<double>");
610 case AV_OPT_TYPE_FLOAT:
611 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<float>");
613 case AV_OPT_TYPE_STRING:
614 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<string>");
616 case AV_OPT_TYPE_RATIONAL:
617 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<rational>");
619 case AV_OPT_TYPE_BINARY:
620 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<binary>");
622 case AV_OPT_TYPE_IMAGE_SIZE:
623 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<image_size>");
625 case AV_OPT_TYPE_PIXEL_FMT:
626 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<pix_fmt>");
628 case AV_OPT_TYPE_CONST:
630 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "");
633 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_ENCODING_PARAM) ? 'E' : '.');
634 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_DECODING_PARAM) ? 'D' : '.');
635 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_VIDEO_PARAM ) ? 'V' : '.');
636 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_AUDIO_PARAM ) ? 'A' : '.');
637 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_SUBTITLE_PARAM) ? 'S' : '.');
640 av_log(av_log_obj, AV_LOG_INFO, " %s", opt->help);
641 av_log(av_log_obj, AV_LOG_INFO, "\n");
642 if (opt->unit && opt->type != AV_OPT_TYPE_CONST) {
643 opt_list(obj, av_log_obj, opt->unit, req_flags, rej_flags);
648 int av_opt_show2(void *obj, void *av_log_obj, int req_flags, int rej_flags)
653 av_log(av_log_obj, AV_LOG_INFO, "%s AVOptions:\n", (*(AVClass**)obj)->class_name);
655 opt_list(obj, av_log_obj, NULL, req_flags, rej_flags);
660 void av_opt_set_defaults(void *s)
662 #if FF_API_OLD_AVOPTIONS
663 av_opt_set_defaults2(s, 0, 0);
666 void av_opt_set_defaults2(void *s, int mask, int flags)
669 const AVOption *opt = NULL;
670 while ((opt = av_opt_next(s, opt)) != NULL) {
671 #if FF_API_OLD_AVOPTIONS
672 if ((opt->flags & mask) != flags)
676 case AV_OPT_TYPE_CONST:
677 /* Nothing to be done here */
679 case AV_OPT_TYPE_FLAGS:
680 case AV_OPT_TYPE_INT: {
682 val = opt->default_val.dbl;
683 av_opt_set_int(s, opt->name, val, 0);
686 case AV_OPT_TYPE_INT64:
687 if ((double)(opt->default_val.dbl+0.6) == opt->default_val.dbl)
688 av_log(s, AV_LOG_DEBUG, "loss of precision in default of %s\n", opt->name);
689 av_opt_set_int(s, opt->name, opt->default_val.dbl, 0);
691 case AV_OPT_TYPE_DOUBLE:
692 case AV_OPT_TYPE_FLOAT: {
694 val = opt->default_val.dbl;
695 av_opt_set_double(s, opt->name, val, 0);
698 case AV_OPT_TYPE_RATIONAL: {
700 val = av_d2q(opt->default_val.dbl, INT_MAX);
701 av_opt_set_q(s, opt->name, val, 0);
704 case AV_OPT_TYPE_STRING:
705 case AV_OPT_TYPE_IMAGE_SIZE:
706 case AV_OPT_TYPE_PIXEL_FMT:
707 av_opt_set(s, opt->name, opt->default_val.str, 0);
709 case AV_OPT_TYPE_BINARY:
710 /* Cannot set default for binary */
713 av_log(s, AV_LOG_DEBUG, "AVOption type %d of option %s not implemented yet\n", opt->type, opt->name);
719 * Store the value in the field in ctx that is named like key.
720 * ctx must be an AVClass context, storing is done using AVOptions.
722 * @param buf the string to parse, buf will be updated to point at the
723 * separator just after the parsed key/value pair
724 * @param key_val_sep a 0-terminated list of characters used to
725 * separate key from value
726 * @param pairs_sep a 0-terminated list of characters used to separate
727 * two pairs from each other
728 * @return 0 if the key/value pair has been successfully parsed and
729 * set, or a negative value corresponding to an AVERROR code in case
731 * AVERROR(EINVAL) if the key/value pair cannot be parsed,
732 * the error code issued by av_opt_set() if the key/value pair
735 static int parse_key_value_pair(void *ctx, const char **buf,
736 const char *key_val_sep, const char *pairs_sep)
738 char *key = av_get_token(buf, key_val_sep);
742 if (*key && strspn(*buf, key_val_sep)) {
744 val = av_get_token(buf, pairs_sep);
746 av_log(ctx, AV_LOG_ERROR, "Missing key or no key/value separator found after key '%s'\n", key);
748 return AVERROR(EINVAL);
751 av_log(ctx, AV_LOG_DEBUG, "Setting entry with key '%s' to value '%s'\n", key, val);
753 ret = av_opt_set(ctx, key, val, 0);
754 if (ret == AVERROR_OPTION_NOT_FOUND)
755 av_log(ctx, AV_LOG_ERROR, "Key '%s' not found.\n", key);
762 int av_set_options_string(void *ctx, const char *opts,
763 const char *key_val_sep, const char *pairs_sep)
771 if ((ret = parse_key_value_pair(ctx, &opts, key_val_sep, pairs_sep)) < 0)
782 void av_opt_free(void *obj)
784 const AVOption *o = NULL;
785 while ((o = av_opt_next(obj, o)))
786 if (o->type == AV_OPT_TYPE_STRING || o->type == AV_OPT_TYPE_BINARY)
787 av_freep((uint8_t *)obj + o->offset);
790 int av_opt_set_dict(void *obj, AVDictionary **options)
792 AVDictionaryEntry *t = NULL;
793 AVDictionary *tmp = NULL;
796 while ((t = av_dict_get(*options, "", t, AV_DICT_IGNORE_SUFFIX))) {
797 ret = av_opt_set(obj, t->key, t->value, 0);
798 if (ret == AVERROR_OPTION_NOT_FOUND)
799 av_dict_set(&tmp, t->key, t->value, 0);
801 av_log(obj, AV_LOG_ERROR, "Error setting option %s to value %s.\n", t->key, t->value);
806 av_dict_free(options);
811 const AVOption *av_opt_find(void *obj, const char *name, const char *unit,
812 int opt_flags, int search_flags)
814 return av_opt_find2(obj, name, unit, opt_flags, search_flags, NULL);
817 const AVOption *av_opt_find2(void *obj, const char *name, const char *unit,
818 int opt_flags, int search_flags, void **target_obj)
821 const AVOption *o = NULL;
828 if (search_flags & AV_OPT_SEARCH_CHILDREN) {
829 if (search_flags & AV_OPT_SEARCH_FAKE_OBJ) {
830 const AVClass *child = NULL;
831 while (child = av_opt_child_class_next(c, child))
832 if (o = av_opt_find2(&child, name, unit, opt_flags, search_flags, NULL))
836 while (child = av_opt_child_next(obj, child))
837 if (o = av_opt_find2(child, name, unit, opt_flags, search_flags, target_obj))
842 while (o = av_opt_next(obj, o)) {
843 if (!strcmp(o->name, name) && (o->flags & opt_flags) == opt_flags &&
844 ((!unit && o->type != AV_OPT_TYPE_CONST) ||
845 (unit && o->type == AV_OPT_TYPE_CONST && o->unit && !strcmp(o->unit, unit)))) {
847 if (!(search_flags & AV_OPT_SEARCH_FAKE_OBJ))
858 void *av_opt_child_next(void *obj, void *prev)
860 const AVClass *c = *(AVClass**)obj;
862 return c->child_next(obj, prev);
866 const AVClass *av_opt_child_class_next(const AVClass *parent, const AVClass *prev)
868 if (parent->child_class_next)
869 return parent->child_class_next(prev);
873 void *av_opt_ptr(const AVClass *class, void *obj, const char *name)
875 const AVOption *opt= av_opt_find2(&class, name, NULL, 0, AV_OPT_SEARCH_FAKE_OBJ, NULL);
878 return (uint8_t*)obj + opt->offset;
885 typedef struct TestContext
887 const AVClass *class;
894 enum PixelFormat pix_fmt;
897 #define OFFSET(x) offsetof(TestContext, x)
899 #define TEST_FLAG_COOL 01
900 #define TEST_FLAG_LAME 02
901 #define TEST_FLAG_MU 04
903 static const AVOption test_options[]= {
904 {"num", "set num", OFFSET(num), AV_OPT_TYPE_INT, {0}, 0, 100 },
905 {"toggle", "set toggle", OFFSET(toggle), AV_OPT_TYPE_INT, {0}, 0, 1 },
906 {"rational", "set rational", OFFSET(rational), AV_OPT_TYPE_RATIONAL, {0}, 0, 10 },
907 {"string", "set string", OFFSET(string), AV_OPT_TYPE_STRING, {0}, CHAR_MIN, CHAR_MAX },
908 {"flags", "set flags", OFFSET(flags), AV_OPT_TYPE_FLAGS, {0}, 0, INT_MAX, 0, "flags" },
909 {"cool", "set cool flag ", 0, AV_OPT_TYPE_CONST, {TEST_FLAG_COOL}, INT_MIN, INT_MAX, 0, "flags" },
910 {"lame", "set lame flag ", 0, AV_OPT_TYPE_CONST, {TEST_FLAG_LAME}, INT_MIN, INT_MAX, 0, "flags" },
911 {"mu", "set mu flag ", 0, AV_OPT_TYPE_CONST, {TEST_FLAG_MU}, INT_MIN, INT_MAX, 0, "flags" },
912 {"size", "set size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE,{0}, 0, 0 },
913 {"pix_fmt", "set pixfmt", OFFSET(pix_fmt), AV_OPT_TYPE_PIXEL_FMT,{0}, 0, 0 },
917 static const char *test_get_name(void *ctx)
922 static const AVClass test_class = {
932 printf("\nTesting av_set_options_string()\n");
934 TestContext test_ctx = { 0 };
935 const char *options[] = {
951 "flags=+mu-lame : num=42: toggle=0",
952 "num=42 : string=blahblah",
953 "rational=0 : rational=1/2 : rational=1/-1",
963 test_ctx.class = &test_class;
964 av_opt_set_defaults(&test_ctx);
965 test_ctx.string = av_strdup("default");
967 av_log_set_level(AV_LOG_DEBUG);
969 for (i=0; i < FF_ARRAY_ELEMS(options); i++) {
970 av_log(&test_ctx, AV_LOG_DEBUG, "Setting options string '%s'\n", options[i]);
971 if (av_set_options_string(&test_ctx, options[i], "=", ":") < 0)
972 av_log(&test_ctx, AV_LOG_ERROR, "Error setting options string: '%s'\n", options[i]);
975 av_freep(&test_ctx.string);