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>
35 #include "parseutils.h"
37 #include "mathematics.h"
40 //FIXME order them and do a bin search
41 const AVOption *av_find_opt(void *v, const char *name, const char *unit, int mask, int flags)
43 const AVOption *o = NULL;
45 while ((o = av_next_option(v, o))) {
46 if (!strcmp(o->name, name) && (!unit || (o->unit && !strcmp(o->unit, unit))) && (o->flags & mask) == flags)
53 #if FF_API_OLD_AVOPTIONS
54 const AVOption *av_next_option(void *obj, const AVOption *last)
56 return av_opt_next(obj, last);
60 const AVOption *av_opt_next(void *obj, const AVOption *last)
62 AVClass *class = *(AVClass**)obj;
63 if (!last && class->option && class->option[0].name)
65 if (last && last[1].name) return ++last;
69 static int read_number(const AVOption *o, void *dst, double *num, int *den, int64_t *intnum)
72 case AV_OPT_TYPE_FLAGS: *intnum = *(unsigned int*)dst;return 0;
73 case AV_OPT_TYPE_INT: *intnum = *(int *)dst;return 0;
74 case AV_OPT_TYPE_INT64: *intnum = *(int64_t *)dst;return 0;
75 case AV_OPT_TYPE_FLOAT: *num = *(float *)dst;return 0;
76 case AV_OPT_TYPE_DOUBLE: *num = *(double *)dst;return 0;
77 case AV_OPT_TYPE_RATIONAL: *intnum = ((AVRational*)dst)->num;
78 *den = ((AVRational*)dst)->den;
80 case AV_OPT_TYPE_CONST: *num = o->default_val.dbl; return 0;
82 return AVERROR(EINVAL);
85 static int write_number(void *obj, const AVOption *o, void *dst, double num, int den, int64_t intnum)
87 if (o->max*den < num*intnum || o->min*den > num*intnum) {
88 av_log(obj, AV_LOG_ERROR, "Value %f for parameter '%s' out of range\n",
89 num*intnum/den, o->name);
90 return AVERROR(ERANGE);
94 case AV_OPT_TYPE_FLAGS:
95 case AV_OPT_TYPE_INT: *(int *)dst= llrint(num/den)*intnum; break;
96 case AV_OPT_TYPE_INT64: *(int64_t *)dst= llrint(num/den)*intnum; break;
97 case AV_OPT_TYPE_FLOAT: *(float *)dst= num*intnum/den; break;
98 case AV_OPT_TYPE_DOUBLE:*(double *)dst= num*intnum/den; break;
99 case AV_OPT_TYPE_RATIONAL:
100 if ((int)num == num) *(AVRational*)dst= (AVRational){num*intnum, den};
101 else *(AVRational*)dst= av_d2q(num*intnum/den, 1<<24);
104 return AVERROR(EINVAL);
109 static const double const_values[] = {
116 static const char * const const_names[] = {
123 static int hexchar2int(char c) {
124 if (c >= '0' && c <= '9') return c - '0';
125 if (c >= 'a' && c <= 'f') return c - 'a' + 10;
126 if (c >= 'A' && c <= 'F') return c - 'A' + 10;
130 static int set_string_binary(void *obj, const AVOption *o, const char *val, uint8_t **dst)
132 int *lendst = (int *)(dst + 1);
134 int len = strlen(val);
140 return AVERROR(EINVAL);
143 ptr = bin = av_malloc(len);
145 int a = hexchar2int(*val++);
146 int b = hexchar2int(*val++);
147 if (a < 0 || b < 0) {
149 return AVERROR(EINVAL);
151 *ptr++ = (a << 4) | b;
159 static int set_string(void *obj, const AVOption *o, const char *val, uint8_t **dst)
162 *dst = av_strdup(val);
166 static int set_string_number(void *obj, const AVOption *o, const char *val, void *dst)
168 int ret = 0, notfirst = 0;
176 if (*val == '+' || *val == '-')
179 for (i = 0; i < sizeof(buf) - 1 && val[i] && val[i] != '+' && val[i] != '-'; i++)
184 const AVOption *o_named = av_opt_find(obj, buf, o->unit, 0, 0);
185 if (o_named && o_named->type == AV_OPT_TYPE_CONST)
186 d = o_named->default_val.dbl;
187 else if (!strcmp(buf, "default")) d = o->default_val.dbl;
188 else if (!strcmp(buf, "max" )) d = o->max;
189 else if (!strcmp(buf, "min" )) d = o->min;
190 else if (!strcmp(buf, "none" )) d = 0;
191 else if (!strcmp(buf, "all" )) d = ~0;
193 int res = av_expr_parse_and_eval(&d, buf, const_names, const_values, NULL, NULL, NULL, NULL, NULL, 0, obj);
195 av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\"\n", val);
200 if (o->type == AV_OPT_TYPE_FLAGS) {
201 read_number(o, dst, NULL, NULL, &intnum);
202 if (cmd == '+') d = intnum | (int64_t)d;
203 else if (cmd == '-') d = intnum &~(int64_t)d;
205 read_number(o, dst, &num, &den, &intnum);
206 if (cmd == '+') d = notfirst*num*intnum/den + d;
207 else if (cmd == '-') d = notfirst*num*intnum/den - d;
210 if ((ret = write_number(obj, o, dst, d, 1, 1)) < 0)
221 #if FF_API_OLD_AVOPTIONS
222 int av_set_string3(void *obj, const char *name, const char *val, int alloc, const AVOption **o_out)
224 const AVOption *o = av_opt_find(obj, name, NULL, 0, 0);
227 return av_opt_set(obj, name, val, 0);
231 int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
234 void *dst, *target_obj;
235 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
236 if (!o || !target_obj)
237 return AVERROR_OPTION_NOT_FOUND;
238 if (!val && o->type != AV_OPT_TYPE_STRING)
239 return AVERROR(EINVAL);
241 dst = ((uint8_t*)target_obj) + o->offset;
243 case AV_OPT_TYPE_STRING: return set_string(obj, o, val, dst);
244 case AV_OPT_TYPE_BINARY: return set_string_binary(obj, o, val, dst);
245 case AV_OPT_TYPE_FLAGS:
246 case AV_OPT_TYPE_INT:
247 case AV_OPT_TYPE_INT64:
248 case AV_OPT_TYPE_FLOAT:
249 case AV_OPT_TYPE_DOUBLE:
250 case AV_OPT_TYPE_RATIONAL: return set_string_number(obj, o, val, dst);
251 case AV_OPT_TYPE_IMAGE_SIZE:
252 ret = av_parse_video_size(dst, ((int *)dst) + 1, val);
254 av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as image size\n", val);
256 case AV_OPT_TYPE_PIXEL_FMT:
257 ret = av_get_pix_fmt(val);
258 if (ret == PIX_FMT_NONE) {
260 ret = strtol(val, &tail, 0);
261 if (*tail || (unsigned)ret >= PIX_FMT_NB) {
262 av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as pixel format\n", val);
263 return AVERROR(EINVAL);
266 *(enum PixelFormat *)dst = ret;
270 av_log(obj, AV_LOG_ERROR, "Invalid option type.\n");
271 return AVERROR(EINVAL);
274 #define OPT_EVAL_NUMBER(name, opttype, vartype)\
275 int av_opt_eval_ ## name(void *obj, const AVOption *o, const char *val, vartype *name ## _out)\
277 if (!o || o->type != opttype)\
278 return AVERROR(EINVAL);\
279 return set_string_number(obj, o, val, name ## _out);\
282 OPT_EVAL_NUMBER(flags, AV_OPT_TYPE_FLAGS, int)
283 OPT_EVAL_NUMBER(int, AV_OPT_TYPE_INT, int)
284 OPT_EVAL_NUMBER(int64, AV_OPT_TYPE_INT64, int64_t)
285 OPT_EVAL_NUMBER(float, AV_OPT_TYPE_FLOAT, float)
286 OPT_EVAL_NUMBER(double, AV_OPT_TYPE_DOUBLE, double)
287 OPT_EVAL_NUMBER(q, AV_OPT_TYPE_RATIONAL, AVRational)
289 static int set_number(void *obj, const char *name, double num, int den, int64_t intnum,
292 void *dst, *target_obj;
293 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
295 if (!o || !target_obj)
296 return AVERROR_OPTION_NOT_FOUND;
298 dst = ((uint8_t*)target_obj) + o->offset;
299 return write_number(obj, o, dst, num, den, intnum);
302 #if FF_API_OLD_AVOPTIONS
303 const AVOption *av_set_double(void *obj, const char *name, double n)
305 const AVOption *o = av_opt_find(obj, name, NULL, 0, 0);
306 if (set_number(obj, name, n, 1, 1, 0) < 0)
311 const AVOption *av_set_q(void *obj, const char *name, AVRational n)
313 const AVOption *o = av_opt_find(obj, name, NULL, 0, 0);
314 if (set_number(obj, name, n.num, n.den, 1, 0) < 0)
319 const AVOption *av_set_int(void *obj, const char *name, int64_t n)
321 const AVOption *o = av_opt_find(obj, name, NULL, 0, 0);
322 if (set_number(obj, name, 1, 1, n, 0) < 0)
328 int av_opt_set_int(void *obj, const char *name, int64_t val, int search_flags)
330 return set_number(obj, name, 1, 1, val, search_flags);
333 int av_opt_set_double(void *obj, const char *name, double val, int search_flags)
335 return set_number(obj, name, val, 1, 1, search_flags);
338 int av_opt_set_q(void *obj, const char *name, AVRational val, int search_flags)
340 return set_number(obj, name, val.num, val.den, 1, search_flags);
343 int av_opt_set_bin(void *obj, const char *name, const uint8_t *val, int len, int search_flags)
346 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
351 if (!o || !target_obj)
352 return AVERROR_OPTION_NOT_FOUND;
354 if (o->type != AV_OPT_TYPE_BINARY)
355 return AVERROR(EINVAL);
357 ptr = av_malloc(len);
359 return AVERROR(ENOMEM);
361 dst = (uint8_t **)(((uint8_t *)target_obj) + o->offset);
362 lendst = (int *)(dst + 1);
367 memcpy(ptr, val, len);
372 #if FF_API_OLD_AVOPTIONS
375 * @param buf a buffer which is used for returning non string values as strings, can be NULL
376 * @param buf_len allocated length in bytes of buf
378 const char *av_get_string(void *obj, const char *name, const AVOption **o_out, char *buf, int buf_len)
380 const AVOption *o = av_opt_find(obj, name, NULL, 0, AV_OPT_SEARCH_CHILDREN);
386 if (o->type != AV_OPT_TYPE_STRING && (!buf || !buf_len))
389 dst= ((uint8_t*)obj) + o->offset;
390 if (o_out) *o_out= o;
393 case AV_OPT_TYPE_FLAGS: snprintf(buf, buf_len, "0x%08X",*(int *)dst);break;
394 case AV_OPT_TYPE_INT: snprintf(buf, buf_len, "%d" , *(int *)dst);break;
395 case AV_OPT_TYPE_INT64: snprintf(buf, buf_len, "%"PRId64, *(int64_t*)dst);break;
396 case AV_OPT_TYPE_FLOAT: snprintf(buf, buf_len, "%f" , *(float *)dst);break;
397 case AV_OPT_TYPE_DOUBLE: snprintf(buf, buf_len, "%f" , *(double *)dst);break;
398 case AV_OPT_TYPE_RATIONAL: snprintf(buf, buf_len, "%d/%d", ((AVRational*)dst)->num, ((AVRational*)dst)->den);break;
399 case AV_OPT_TYPE_CONST: snprintf(buf, buf_len, "%f" , o->default_val.dbl);break;
400 case AV_OPT_TYPE_STRING: return *(void**)dst;
401 case AV_OPT_TYPE_BINARY:
402 len = *(int*)(((uint8_t *)dst) + sizeof(uint8_t *));
403 if (len >= (buf_len + 1)/2) return NULL;
404 bin = *(uint8_t**)dst;
405 for (i = 0; i < len; i++) snprintf(buf + i*2, 3, "%02X", bin[i]);
407 default: return NULL;
413 int av_opt_get(void *obj, const char *name, int search_flags, uint8_t **out_val)
415 void *dst, *target_obj;
416 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
417 uint8_t *bin, buf[128];
420 if (!o || !target_obj || (o->offset<=0 && o->type != AV_OPT_TYPE_CONST))
421 return AVERROR_OPTION_NOT_FOUND;
423 dst = (uint8_t*)target_obj + o->offset;
427 case AV_OPT_TYPE_FLAGS: ret = snprintf(buf, sizeof(buf), "0x%08X", *(int *)dst);break;
428 case AV_OPT_TYPE_INT: ret = snprintf(buf, sizeof(buf), "%d" , *(int *)dst);break;
429 case AV_OPT_TYPE_INT64: ret = snprintf(buf, sizeof(buf), "%"PRId64, *(int64_t*)dst);break;
430 case AV_OPT_TYPE_FLOAT: ret = snprintf(buf, sizeof(buf), "%f" , *(float *)dst);break;
431 case AV_OPT_TYPE_DOUBLE: ret = snprintf(buf, sizeof(buf), "%f" , *(double *)dst);break;
432 case AV_OPT_TYPE_RATIONAL: ret = snprintf(buf, sizeof(buf), "%d/%d", ((AVRational*)dst)->num, ((AVRational*)dst)->den);break;
433 case AV_OPT_TYPE_CONST: ret = snprintf(buf, sizeof(buf), "%f" , o->default_val.dbl);break;
434 case AV_OPT_TYPE_STRING:
436 *out_val = av_strdup(*(uint8_t**)dst);
438 *out_val = av_strdup("");
440 case AV_OPT_TYPE_BINARY:
441 len = *(int*)(((uint8_t *)dst) + sizeof(uint8_t *));
442 if ((uint64_t)len*2 + 1 > INT_MAX)
443 return AVERROR(EINVAL);
444 if (!(*out_val = av_malloc(len*2 + 1)))
445 return AVERROR(ENOMEM);
446 bin = *(uint8_t**)dst;
447 for (i = 0; i < len; i++)
448 snprintf(*out_val + i*2, 3, "%02X", bin[i]);
450 case AV_OPT_TYPE_IMAGE_SIZE:
451 ret = snprintf(buf, sizeof(buf), "%dx%d", ((int *)dst)[0], ((int *)dst)[1]);
453 case AV_OPT_TYPE_PIXEL_FMT:
454 ret = snprintf(buf, sizeof(buf), "%s", (char *)av_x_if_null(av_get_pix_fmt_name(*(enum PixelFormat *)dst), "?"));
457 return AVERROR(EINVAL);
460 if (ret >= sizeof(buf))
461 return AVERROR(EINVAL);
462 *out_val = av_strdup(buf);
466 static int get_number(void *obj, const char *name, const AVOption **o_out, double *num, int *den, int64_t *intnum,
469 void *dst, *target_obj;
470 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
471 if (!o || !target_obj)
474 dst = ((uint8_t*)target_obj) + o->offset;
476 if (o_out) *o_out= o;
478 return read_number(o, dst, num, den, intnum);
485 #if FF_API_OLD_AVOPTIONS
486 double av_get_double(void *obj, const char *name, const AVOption **o_out)
492 if (get_number(obj, name, o_out, &num, &den, &intnum, 0) < 0)
494 return num*intnum/den;
497 AVRational av_get_q(void *obj, const char *name, const AVOption **o_out)
503 if (get_number(obj, name, o_out, &num, &den, &intnum, 0) < 0)
504 return (AVRational){0, 0};
505 if (num == 1.0 && (int)intnum == intnum)
506 return (AVRational){intnum, den};
508 return av_d2q(num*intnum/den, 1<<24);
511 int64_t av_get_int(void *obj, const char *name, const AVOption **o_out)
517 if (get_number(obj, name, o_out, &num, &den, &intnum, 0) < 0)
519 return num*intnum/den;
523 int av_opt_get_int(void *obj, const char *name, int search_flags, int64_t *out_val)
529 if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0)
531 *out_val = num*intnum/den;
535 int av_opt_get_double(void *obj, const char *name, int search_flags, double *out_val)
541 if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0)
543 *out_val = num*intnum/den;
547 int av_opt_get_q(void *obj, const char *name, int search_flags, AVRational *out_val)
553 if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0)
556 if (num == 1.0 && (int)intnum == intnum)
557 *out_val = (AVRational){intnum, den};
559 *out_val = av_d2q(num*intnum/den, 1<<24);
563 int av_opt_flag_is_set(void *obj, const char *field_name, const char *flag_name)
565 const AVOption *field = av_opt_find(obj, field_name, NULL, 0, 0);
566 const AVOption *flag = av_opt_find(obj, flag_name,
567 field ? field->unit : NULL, 0, 0);
570 if (!field || !flag || flag->type != AV_OPT_TYPE_CONST ||
571 av_opt_get_int(obj, field_name, 0, &res) < 0)
573 return res & (int) flag->default_val.dbl;
576 static void opt_list(void *obj, void *av_log_obj, const char *unit,
577 int req_flags, int rej_flags)
579 const AVOption *opt=NULL;
581 while ((opt = av_opt_next(obj, opt))) {
582 if (!(opt->flags & req_flags) || (opt->flags & rej_flags))
585 /* Don't print CONST's on level one.
586 * Don't print anything but CONST's on level two.
587 * Only print items from the requested unit.
589 if (!unit && opt->type==AV_OPT_TYPE_CONST)
591 else if (unit && opt->type!=AV_OPT_TYPE_CONST)
593 else if (unit && opt->type==AV_OPT_TYPE_CONST && strcmp(unit, opt->unit))
595 else if (unit && opt->type == AV_OPT_TYPE_CONST)
596 av_log(av_log_obj, AV_LOG_INFO, " %-15s ", opt->name);
598 av_log(av_log_obj, AV_LOG_INFO, "-%-17s ", opt->name);
601 case AV_OPT_TYPE_FLAGS:
602 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<flags>");
604 case AV_OPT_TYPE_INT:
605 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<int>");
607 case AV_OPT_TYPE_INT64:
608 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<int64>");
610 case AV_OPT_TYPE_DOUBLE:
611 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<double>");
613 case AV_OPT_TYPE_FLOAT:
614 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<float>");
616 case AV_OPT_TYPE_STRING:
617 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<string>");
619 case AV_OPT_TYPE_RATIONAL:
620 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<rational>");
622 case AV_OPT_TYPE_BINARY:
623 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<binary>");
625 case AV_OPT_TYPE_IMAGE_SIZE:
626 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<image_size>");
628 case AV_OPT_TYPE_PIXEL_FMT:
629 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<pix_fmt>");
631 case AV_OPT_TYPE_CONST:
633 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "");
636 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_ENCODING_PARAM) ? 'E' : '.');
637 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_DECODING_PARAM) ? 'D' : '.');
638 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_FILTERING_PARAM)? 'F' : '.');
639 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_VIDEO_PARAM ) ? 'V' : '.');
640 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_AUDIO_PARAM ) ? 'A' : '.');
641 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_SUBTITLE_PARAM) ? 'S' : '.');
644 av_log(av_log_obj, AV_LOG_INFO, " %s", opt->help);
645 av_log(av_log_obj, AV_LOG_INFO, "\n");
646 if (opt->unit && opt->type != AV_OPT_TYPE_CONST) {
647 opt_list(obj, av_log_obj, opt->unit, req_flags, rej_flags);
652 int av_opt_show2(void *obj, void *av_log_obj, int req_flags, int rej_flags)
657 av_log(av_log_obj, AV_LOG_INFO, "%s AVOptions:\n", (*(AVClass**)obj)->class_name);
659 opt_list(obj, av_log_obj, NULL, req_flags, rej_flags);
664 void av_opt_set_defaults(void *s)
666 #if FF_API_OLD_AVOPTIONS
667 av_opt_set_defaults2(s, 0, 0);
670 void av_opt_set_defaults2(void *s, int mask, int flags)
673 const AVOption *opt = NULL;
674 while ((opt = av_opt_next(s, opt)) != NULL) {
675 #if FF_API_OLD_AVOPTIONS
676 if ((opt->flags & mask) != flags)
680 case AV_OPT_TYPE_CONST:
681 /* Nothing to be done here */
683 case AV_OPT_TYPE_FLAGS:
684 case AV_OPT_TYPE_INT: {
686 val = opt->default_val.dbl;
687 av_opt_set_int(s, opt->name, val, 0);
690 case AV_OPT_TYPE_INT64:
691 if ((double)(opt->default_val.dbl+0.6) == opt->default_val.dbl)
692 av_log(s, AV_LOG_DEBUG, "loss of precision in default of %s\n", opt->name);
693 av_opt_set_int(s, opt->name, opt->default_val.dbl, 0);
695 case AV_OPT_TYPE_DOUBLE:
696 case AV_OPT_TYPE_FLOAT: {
698 val = opt->default_val.dbl;
699 av_opt_set_double(s, opt->name, val, 0);
702 case AV_OPT_TYPE_RATIONAL: {
704 val = av_d2q(opt->default_val.dbl, INT_MAX);
705 av_opt_set_q(s, opt->name, val, 0);
708 case AV_OPT_TYPE_STRING:
709 case AV_OPT_TYPE_IMAGE_SIZE:
710 case AV_OPT_TYPE_PIXEL_FMT:
711 av_opt_set(s, opt->name, opt->default_val.str, 0);
713 case AV_OPT_TYPE_BINARY:
714 /* Cannot set default for binary */
717 av_log(s, AV_LOG_DEBUG, "AVOption type %d of option %s not implemented yet\n", opt->type, opt->name);
723 * Store the value in the field in ctx that is named like key.
724 * ctx must be an AVClass context, storing is done using AVOptions.
726 * @param buf the string to parse, buf will be updated to point at the
727 * separator just after the parsed key/value pair
728 * @param key_val_sep a 0-terminated list of characters used to
729 * separate key from value
730 * @param pairs_sep a 0-terminated list of characters used to separate
731 * two pairs from each other
732 * @return 0 if the key/value pair has been successfully parsed and
733 * set, or a negative value corresponding to an AVERROR code in case
735 * AVERROR(EINVAL) if the key/value pair cannot be parsed,
736 * the error code issued by av_opt_set() if the key/value pair
739 static int parse_key_value_pair(void *ctx, const char **buf,
740 const char *key_val_sep, const char *pairs_sep)
742 char *key = av_get_token(buf, key_val_sep);
746 if (*key && strspn(*buf, key_val_sep)) {
748 val = av_get_token(buf, pairs_sep);
750 av_log(ctx, AV_LOG_ERROR, "Missing key or no key/value separator found after key '%s'\n", key);
752 return AVERROR(EINVAL);
755 av_log(ctx, AV_LOG_DEBUG, "Setting entry with key '%s' to value '%s'\n", key, val);
757 ret = av_opt_set(ctx, key, val, 0);
758 if (ret == AVERROR_OPTION_NOT_FOUND)
759 av_log(ctx, AV_LOG_ERROR, "Key '%s' not found.\n", key);
766 int av_set_options_string(void *ctx, const char *opts,
767 const char *key_val_sep, const char *pairs_sep)
775 if ((ret = parse_key_value_pair(ctx, &opts, key_val_sep, pairs_sep)) < 0)
786 void av_opt_free(void *obj)
788 const AVOption *o = NULL;
789 while ((o = av_opt_next(obj, o)))
790 if (o->type == AV_OPT_TYPE_STRING || o->type == AV_OPT_TYPE_BINARY)
791 av_freep((uint8_t *)obj + o->offset);
794 int av_opt_set_dict(void *obj, AVDictionary **options)
796 AVDictionaryEntry *t = NULL;
797 AVDictionary *tmp = NULL;
800 while ((t = av_dict_get(*options, "", t, AV_DICT_IGNORE_SUFFIX))) {
801 ret = av_opt_set(obj, t->key, t->value, 0);
802 if (ret == AVERROR_OPTION_NOT_FOUND)
803 av_dict_set(&tmp, t->key, t->value, 0);
805 av_log(obj, AV_LOG_ERROR, "Error setting option %s to value %s.\n", t->key, t->value);
810 av_dict_free(options);
815 const AVOption *av_opt_find(void *obj, const char *name, const char *unit,
816 int opt_flags, int search_flags)
818 return av_opt_find2(obj, name, unit, opt_flags, search_flags, NULL);
821 const AVOption *av_opt_find2(void *obj, const char *name, const char *unit,
822 int opt_flags, int search_flags, void **target_obj)
825 const AVOption *o = NULL;
832 if (search_flags & AV_OPT_SEARCH_CHILDREN) {
833 if (search_flags & AV_OPT_SEARCH_FAKE_OBJ) {
834 const AVClass *child = NULL;
835 while (child = av_opt_child_class_next(c, child))
836 if (o = av_opt_find2(&child, name, unit, opt_flags, search_flags, NULL))
840 while (child = av_opt_child_next(obj, child))
841 if (o = av_opt_find2(child, name, unit, opt_flags, search_flags, target_obj))
846 while (o = av_opt_next(obj, o)) {
847 if (!strcmp(o->name, name) && (o->flags & opt_flags) == opt_flags &&
848 ((!unit && o->type != AV_OPT_TYPE_CONST) ||
849 (unit && o->type == AV_OPT_TYPE_CONST && o->unit && !strcmp(o->unit, unit)))) {
851 if (!(search_flags & AV_OPT_SEARCH_FAKE_OBJ))
862 void *av_opt_child_next(void *obj, void *prev)
864 const AVClass *c = *(AVClass**)obj;
866 return c->child_next(obj, prev);
870 const AVClass *av_opt_child_class_next(const AVClass *parent, const AVClass *prev)
872 if (parent->child_class_next)
873 return parent->child_class_next(prev);
877 void *av_opt_ptr(const AVClass *class, void *obj, const char *name)
879 const AVOption *opt= av_opt_find2(&class, name, NULL, 0, AV_OPT_SEARCH_FAKE_OBJ, NULL);
882 return (uint8_t*)obj + opt->offset;
889 typedef struct TestContext
891 const AVClass *class;
898 enum PixelFormat pix_fmt;
901 #define OFFSET(x) offsetof(TestContext, x)
903 #define TEST_FLAG_COOL 01
904 #define TEST_FLAG_LAME 02
905 #define TEST_FLAG_MU 04
907 static const AVOption test_options[]= {
908 {"num", "set num", OFFSET(num), AV_OPT_TYPE_INT, {0}, 0, 100 },
909 {"toggle", "set toggle", OFFSET(toggle), AV_OPT_TYPE_INT, {0}, 0, 1 },
910 {"rational", "set rational", OFFSET(rational), AV_OPT_TYPE_RATIONAL, {0}, 0, 10 },
911 {"string", "set string", OFFSET(string), AV_OPT_TYPE_STRING, {0}, CHAR_MIN, CHAR_MAX },
912 {"flags", "set flags", OFFSET(flags), AV_OPT_TYPE_FLAGS, {0}, 0, INT_MAX, 0, "flags" },
913 {"cool", "set cool flag ", 0, AV_OPT_TYPE_CONST, {TEST_FLAG_COOL}, INT_MIN, INT_MAX, 0, "flags" },
914 {"lame", "set lame flag ", 0, AV_OPT_TYPE_CONST, {TEST_FLAG_LAME}, INT_MIN, INT_MAX, 0, "flags" },
915 {"mu", "set mu flag ", 0, AV_OPT_TYPE_CONST, {TEST_FLAG_MU}, INT_MIN, INT_MAX, 0, "flags" },
916 {"size", "set size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE,{0}, 0, 0 },
917 {"pix_fmt", "set pixfmt", OFFSET(pix_fmt), AV_OPT_TYPE_PIXEL_FMT,{0}, 0, 0 },
921 static const char *test_get_name(void *ctx)
926 static const AVClass test_class = {
936 printf("\nTesting av_set_options_string()\n");
938 TestContext test_ctx = { 0 };
939 const char *options[] = {
955 "flags=+mu-lame : num=42: toggle=0",
956 "num=42 : string=blahblah",
957 "rational=0 : rational=1/2 : rational=1/-1",
967 test_ctx.class = &test_class;
968 av_opt_set_defaults(&test_ctx);
969 test_ctx.string = av_strdup("default");
971 av_log_set_level(AV_LOG_DEBUG);
973 for (i=0; i < FF_ARRAY_ELEMS(options); i++) {
974 av_log(&test_ctx, AV_LOG_DEBUG, "Setting options string '%s'\n", options[i]);
975 if (av_set_options_string(&test_ctx, options[i], "=", ":") < 0)
976 av_log(&test_ctx, AV_LOG_ERROR, "Error setting options string: '%s'\n", options[i]);
979 av_freep(&test_ctx.string);