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"
38 #include "samplefmt.h"
41 //FIXME order them and do a bin search
42 const AVOption *av_find_opt(void *v, const char *name, const char *unit, int mask, int flags)
44 const AVOption *o = NULL;
46 while ((o = av_next_option(v, o))) {
47 if (!strcmp(o->name, name) && (!unit || (o->unit && !strcmp(o->unit, unit))) && (o->flags & mask) == flags)
54 #if FF_API_OLD_AVOPTIONS
55 const AVOption *av_next_option(void *obj, const AVOption *last)
57 return av_opt_next(obj, last);
61 const AVOption *av_opt_next(void *obj, const AVOption *last)
63 AVClass *class = *(AVClass**)obj;
64 if (!last && class->option && class->option[0].name)
66 if (last && last[1].name) return ++last;
70 static int read_number(const AVOption *o, void *dst, double *num, int *den, int64_t *intnum)
73 case AV_OPT_TYPE_FLAGS: *intnum = *(unsigned int*)dst;return 0;
74 case AV_OPT_TYPE_INT: *intnum = *(int *)dst;return 0;
75 case AV_OPT_TYPE_INT64: *intnum = *(int64_t *)dst;return 0;
76 case AV_OPT_TYPE_FLOAT: *num = *(float *)dst;return 0;
77 case AV_OPT_TYPE_DOUBLE: *num = *(double *)dst;return 0;
78 case AV_OPT_TYPE_RATIONAL: *intnum = ((AVRational*)dst)->num;
79 *den = ((AVRational*)dst)->den;
81 case AV_OPT_TYPE_CONST: *num = o->default_val.dbl; return 0;
83 return AVERROR(EINVAL);
86 static int write_number(void *obj, const AVOption *o, void *dst, double num, int den, int64_t intnum)
88 if (o->max*den < num*intnum || o->min*den > num*intnum) {
89 av_log(obj, AV_LOG_ERROR, "Value %f for parameter '%s' out of range\n",
90 num*intnum/den, o->name);
91 return AVERROR(ERANGE);
95 case AV_OPT_TYPE_FLAGS:
96 case AV_OPT_TYPE_INT: *(int *)dst= llrint(num/den)*intnum; break;
97 case AV_OPT_TYPE_INT64: *(int64_t *)dst= llrint(num/den)*intnum; break;
98 case AV_OPT_TYPE_FLOAT: *(float *)dst= num*intnum/den; break;
99 case AV_OPT_TYPE_DOUBLE:*(double *)dst= num*intnum/den; break;
100 case AV_OPT_TYPE_RATIONAL:
101 if ((int)num == num) *(AVRational*)dst= (AVRational){num*intnum, den};
102 else *(AVRational*)dst= av_d2q(num*intnum/den, 1<<24);
105 return AVERROR(EINVAL);
110 static const double const_values[] = {
117 static const char * const const_names[] = {
124 static int hexchar2int(char c) {
125 if (c >= '0' && c <= '9') return c - '0';
126 if (c >= 'a' && c <= 'f') return c - 'a' + 10;
127 if (c >= 'A' && c <= 'F') return c - 'A' + 10;
131 static int set_string_binary(void *obj, const AVOption *o, const char *val, uint8_t **dst)
133 int *lendst = (int *)(dst + 1);
135 int len = strlen(val);
141 return AVERROR(EINVAL);
144 ptr = bin = av_malloc(len);
146 int a = hexchar2int(*val++);
147 int b = hexchar2int(*val++);
148 if (a < 0 || b < 0) {
150 return AVERROR(EINVAL);
152 *ptr++ = (a << 4) | b;
160 static int set_string(void *obj, const AVOption *o, const char *val, uint8_t **dst)
163 *dst = av_strdup(val);
167 #define DEFAULT_NUMVAL(opt) ((opt->type == AV_OPT_TYPE_INT64 || \
168 opt->type == AV_OPT_TYPE_CONST || \
169 opt->type == AV_OPT_TYPE_FLAGS || \
170 opt->type == AV_OPT_TYPE_INT) ? \
171 opt->default_val.i64 : opt->default_val.dbl)
173 static int set_string_number(void *obj, const AVOption *o, const char *val, void *dst)
175 int ret = 0, notfirst = 0;
183 if (*val == '+' || *val == '-')
186 for (i = 0; i < sizeof(buf) - 1 && val[i] && val[i] != '+' && val[i] != '-'; i++)
191 const AVOption *o_named = av_opt_find(obj, buf, o->unit, 0, 0);
192 if (o_named && o_named->type == AV_OPT_TYPE_CONST)
193 d = DEFAULT_NUMVAL(o_named);
194 else if (!strcmp(buf, "default")) d = DEFAULT_NUMVAL(o);
195 else if (!strcmp(buf, "max" )) d = o->max;
196 else if (!strcmp(buf, "min" )) d = o->min;
197 else if (!strcmp(buf, "none" )) d = 0;
198 else if (!strcmp(buf, "all" )) d = ~0;
200 int res = av_expr_parse_and_eval(&d, buf, const_names, const_values, NULL, NULL, NULL, NULL, NULL, 0, obj);
202 av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\"\n", val);
207 if (o->type == AV_OPT_TYPE_FLAGS) {
208 read_number(o, dst, NULL, NULL, &intnum);
209 if (cmd == '+') d = intnum | (int64_t)d;
210 else if (cmd == '-') d = intnum &~(int64_t)d;
212 read_number(o, dst, &num, &den, &intnum);
213 if (cmd == '+') d = notfirst*num*intnum/den + d;
214 else if (cmd == '-') d = notfirst*num*intnum/den - d;
217 if ((ret = write_number(obj, o, dst, d, 1, 1)) < 0)
228 #if FF_API_OLD_AVOPTIONS
229 int av_set_string3(void *obj, const char *name, const char *val, int alloc, const AVOption **o_out)
231 const AVOption *o = av_opt_find(obj, name, NULL, 0, 0);
234 return av_opt_set(obj, name, val, 0);
238 int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
241 void *dst, *target_obj;
242 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
243 if (!o || !target_obj)
244 return AVERROR_OPTION_NOT_FOUND;
245 if (!val && (o->type != AV_OPT_TYPE_STRING && o->type != AV_OPT_TYPE_PIXEL_FMT && o->type != AV_OPT_TYPE_IMAGE_SIZE))
246 return AVERROR(EINVAL);
248 dst = ((uint8_t*)target_obj) + o->offset;
250 case AV_OPT_TYPE_STRING: return set_string(obj, o, val, dst);
251 case AV_OPT_TYPE_BINARY: return set_string_binary(obj, o, val, dst);
252 case AV_OPT_TYPE_FLAGS:
253 case AV_OPT_TYPE_INT:
254 case AV_OPT_TYPE_INT64:
255 case AV_OPT_TYPE_FLOAT:
256 case AV_OPT_TYPE_DOUBLE:
257 case AV_OPT_TYPE_RATIONAL: return set_string_number(obj, o, val, dst);
258 case AV_OPT_TYPE_IMAGE_SIZE:
259 if (!val || !strcmp(val, "none")) {
260 *(int *)dst = *((int *)dst + 1) = 0;
263 ret = av_parse_video_size(dst, ((int *)dst) + 1, val);
265 av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as image size\n", val);
267 case AV_OPT_TYPE_PIXEL_FMT:
268 if (!val || !strcmp(val, "none")) {
269 ret = AV_PIX_FMT_NONE;
271 ret = av_get_pix_fmt(val);
272 if (ret == AV_PIX_FMT_NONE) {
274 ret = strtol(val, &tail, 0);
275 if (*tail || (unsigned)ret >= AV_PIX_FMT_NB) {
276 av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as pixel format\n", val);
277 return AVERROR(EINVAL);
281 *(enum AVPixelFormat *)dst = ret;
283 case AV_OPT_TYPE_SAMPLE_FMT:
284 if (!val || !strcmp(val, "none")) {
285 ret = AV_SAMPLE_FMT_NONE;
287 ret = av_get_sample_fmt(val);
288 if (ret == AV_SAMPLE_FMT_NONE) {
290 ret = strtol(val, &tail, 0);
291 if (*tail || (unsigned)ret >= AV_SAMPLE_FMT_NB) {
292 av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as sample format\n", val);
293 return AVERROR(EINVAL);
297 *(enum AVSampleFormat *)dst = ret;
301 av_log(obj, AV_LOG_ERROR, "Invalid option type.\n");
302 return AVERROR(EINVAL);
305 #define OPT_EVAL_NUMBER(name, opttype, vartype)\
306 int av_opt_eval_ ## name(void *obj, const AVOption *o, const char *val, vartype *name ## _out)\
308 if (!o || o->type != opttype)\
309 return AVERROR(EINVAL);\
310 return set_string_number(obj, o, val, name ## _out);\
313 OPT_EVAL_NUMBER(flags, AV_OPT_TYPE_FLAGS, int)
314 OPT_EVAL_NUMBER(int, AV_OPT_TYPE_INT, int)
315 OPT_EVAL_NUMBER(int64, AV_OPT_TYPE_INT64, int64_t)
316 OPT_EVAL_NUMBER(float, AV_OPT_TYPE_FLOAT, float)
317 OPT_EVAL_NUMBER(double, AV_OPT_TYPE_DOUBLE, double)
318 OPT_EVAL_NUMBER(q, AV_OPT_TYPE_RATIONAL, AVRational)
320 static int set_number(void *obj, const char *name, double num, int den, int64_t intnum,
323 void *dst, *target_obj;
324 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
326 if (!o || !target_obj)
327 return AVERROR_OPTION_NOT_FOUND;
329 dst = ((uint8_t*)target_obj) + o->offset;
330 return write_number(obj, o, dst, num, den, intnum);
333 #if FF_API_OLD_AVOPTIONS
334 const AVOption *av_set_double(void *obj, const char *name, double n)
336 const AVOption *o = av_opt_find(obj, name, NULL, 0, 0);
337 if (set_number(obj, name, n, 1, 1, 0) < 0)
342 const AVOption *av_set_q(void *obj, const char *name, AVRational n)
344 const AVOption *o = av_opt_find(obj, name, NULL, 0, 0);
345 if (set_number(obj, name, n.num, n.den, 1, 0) < 0)
350 const AVOption *av_set_int(void *obj, const char *name, int64_t n)
352 const AVOption *o = av_opt_find(obj, name, NULL, 0, 0);
353 if (set_number(obj, name, 1, 1, n, 0) < 0)
359 int av_opt_set_int(void *obj, const char *name, int64_t val, int search_flags)
361 return set_number(obj, name, 1, 1, val, search_flags);
364 int av_opt_set_double(void *obj, const char *name, double val, int search_flags)
366 return set_number(obj, name, val, 1, 1, search_flags);
369 int av_opt_set_q(void *obj, const char *name, AVRational val, int search_flags)
371 return set_number(obj, name, val.num, val.den, 1, search_flags);
374 int av_opt_set_bin(void *obj, const char *name, const uint8_t *val, int len, int search_flags)
377 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
382 if (!o || !target_obj)
383 return AVERROR_OPTION_NOT_FOUND;
385 if (o->type != AV_OPT_TYPE_BINARY)
386 return AVERROR(EINVAL);
388 ptr = av_malloc(len);
390 return AVERROR(ENOMEM);
392 dst = (uint8_t **)(((uint8_t *)target_obj) + o->offset);
393 lendst = (int *)(dst + 1);
398 memcpy(ptr, val, len);
403 #if FF_API_OLD_AVOPTIONS
406 * @param buf a buffer which is used for returning non string values as strings, can be NULL
407 * @param buf_len allocated length in bytes of buf
409 const char *av_get_string(void *obj, const char *name, const AVOption **o_out, char *buf, int buf_len)
411 const AVOption *o = av_opt_find(obj, name, NULL, 0, AV_OPT_SEARCH_CHILDREN);
417 if (o->type != AV_OPT_TYPE_STRING && (!buf || !buf_len))
420 dst= ((uint8_t*)obj) + o->offset;
421 if (o_out) *o_out= o;
424 case AV_OPT_TYPE_FLAGS: snprintf(buf, buf_len, "0x%08X",*(int *)dst);break;
425 case AV_OPT_TYPE_INT: snprintf(buf, buf_len, "%d" , *(int *)dst);break;
426 case AV_OPT_TYPE_INT64: snprintf(buf, buf_len, "%"PRId64, *(int64_t*)dst);break;
427 case AV_OPT_TYPE_FLOAT: snprintf(buf, buf_len, "%f" , *(float *)dst);break;
428 case AV_OPT_TYPE_DOUBLE: snprintf(buf, buf_len, "%f" , *(double *)dst);break;
429 case AV_OPT_TYPE_RATIONAL: snprintf(buf, buf_len, "%d/%d", ((AVRational*)dst)->num, ((AVRational*)dst)->den);break;
430 case AV_OPT_TYPE_CONST: snprintf(buf, buf_len, "%f" , o->default_val.dbl);break;
431 case AV_OPT_TYPE_STRING: return *(void**)dst;
432 case AV_OPT_TYPE_BINARY:
433 len = *(int*)(((uint8_t *)dst) + sizeof(uint8_t *));
434 if (len >= (buf_len + 1)/2) return NULL;
435 bin = *(uint8_t**)dst;
436 for (i = 0; i < len; i++) snprintf(buf + i*2, 3, "%02X", bin[i]);
438 default: return NULL;
444 int av_opt_get(void *obj, const char *name, int search_flags, uint8_t **out_val)
446 void *dst, *target_obj;
447 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
448 uint8_t *bin, buf[128];
451 if (!o || !target_obj || (o->offset<=0 && o->type != AV_OPT_TYPE_CONST))
452 return AVERROR_OPTION_NOT_FOUND;
454 dst = (uint8_t*)target_obj + o->offset;
458 case AV_OPT_TYPE_FLAGS: ret = snprintf(buf, sizeof(buf), "0x%08X", *(int *)dst);break;
459 case AV_OPT_TYPE_INT: ret = snprintf(buf, sizeof(buf), "%d" , *(int *)dst);break;
460 case AV_OPT_TYPE_INT64: ret = snprintf(buf, sizeof(buf), "%"PRId64, *(int64_t*)dst);break;
461 case AV_OPT_TYPE_FLOAT: ret = snprintf(buf, sizeof(buf), "%f" , *(float *)dst);break;
462 case AV_OPT_TYPE_DOUBLE: ret = snprintf(buf, sizeof(buf), "%f" , *(double *)dst);break;
463 case AV_OPT_TYPE_RATIONAL: ret = snprintf(buf, sizeof(buf), "%d/%d", ((AVRational*)dst)->num, ((AVRational*)dst)->den);break;
464 case AV_OPT_TYPE_CONST: ret = snprintf(buf, sizeof(buf), "%f" , o->default_val.dbl);break;
465 case AV_OPT_TYPE_STRING:
467 *out_val = av_strdup(*(uint8_t**)dst);
469 *out_val = av_strdup("");
471 case AV_OPT_TYPE_BINARY:
472 len = *(int*)(((uint8_t *)dst) + sizeof(uint8_t *));
473 if ((uint64_t)len*2 + 1 > INT_MAX)
474 return AVERROR(EINVAL);
475 if (!(*out_val = av_malloc(len*2 + 1)))
476 return AVERROR(ENOMEM);
477 bin = *(uint8_t**)dst;
478 for (i = 0; i < len; i++)
479 snprintf(*out_val + i*2, 3, "%02X", bin[i]);
481 case AV_OPT_TYPE_IMAGE_SIZE:
482 ret = snprintf(buf, sizeof(buf), "%dx%d", ((int *)dst)[0], ((int *)dst)[1]);
484 case AV_OPT_TYPE_PIXEL_FMT:
485 ret = snprintf(buf, sizeof(buf), "%s", (char *)av_x_if_null(av_get_pix_fmt_name(*(enum AVPixelFormat *)dst), "none"));
487 case AV_OPT_TYPE_SAMPLE_FMT:
488 ret = snprintf(buf, sizeof(buf), "%s", (char *)av_x_if_null(av_get_sample_fmt_name(*(enum AVSampleFormat *)dst), "none"));
491 return AVERROR(EINVAL);
494 if (ret >= sizeof(buf))
495 return AVERROR(EINVAL);
496 *out_val = av_strdup(buf);
500 static int get_number(void *obj, const char *name, const AVOption **o_out, double *num, int *den, int64_t *intnum,
503 void *dst, *target_obj;
504 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
505 if (!o || !target_obj)
508 dst = ((uint8_t*)target_obj) + o->offset;
510 if (o_out) *o_out= o;
512 return read_number(o, dst, num, den, intnum);
519 #if FF_API_OLD_AVOPTIONS
520 double av_get_double(void *obj, const char *name, const AVOption **o_out)
526 if (get_number(obj, name, o_out, &num, &den, &intnum, 0) < 0)
528 return num*intnum/den;
531 AVRational av_get_q(void *obj, const char *name, const AVOption **o_out)
537 if (get_number(obj, name, o_out, &num, &den, &intnum, 0) < 0)
538 return (AVRational){0, 0};
539 if (num == 1.0 && (int)intnum == intnum)
540 return (AVRational){intnum, den};
542 return av_d2q(num*intnum/den, 1<<24);
545 int64_t av_get_int(void *obj, const char *name, const AVOption **o_out)
551 if (get_number(obj, name, o_out, &num, &den, &intnum, 0) < 0)
553 return num*intnum/den;
557 int av_opt_get_int(void *obj, const char *name, int search_flags, int64_t *out_val)
563 if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0)
565 *out_val = num*intnum/den;
569 int av_opt_get_double(void *obj, const char *name, int search_flags, double *out_val)
575 if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0)
577 *out_val = num*intnum/den;
581 int av_opt_get_q(void *obj, const char *name, int search_flags, AVRational *out_val)
587 if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0)
590 if (num == 1.0 && (int)intnum == intnum)
591 *out_val = (AVRational){intnum, den};
593 *out_val = av_d2q(num*intnum/den, 1<<24);
597 int av_opt_flag_is_set(void *obj, const char *field_name, const char *flag_name)
599 const AVOption *field = av_opt_find(obj, field_name, NULL, 0, 0);
600 const AVOption *flag = av_opt_find(obj, flag_name,
601 field ? field->unit : NULL, 0, 0);
604 if (!field || !flag || flag->type != AV_OPT_TYPE_CONST ||
605 av_opt_get_int(obj, field_name, 0, &res) < 0)
607 return res & flag->default_val.i64;
610 static void opt_list(void *obj, void *av_log_obj, const char *unit,
611 int req_flags, int rej_flags)
613 const AVOption *opt=NULL;
615 while ((opt = av_opt_next(obj, opt))) {
616 if (!(opt->flags & req_flags) || (opt->flags & rej_flags))
619 /* Don't print CONST's on level one.
620 * Don't print anything but CONST's on level two.
621 * Only print items from the requested unit.
623 if (!unit && opt->type==AV_OPT_TYPE_CONST)
625 else if (unit && opt->type!=AV_OPT_TYPE_CONST)
627 else if (unit && opt->type==AV_OPT_TYPE_CONST && strcmp(unit, opt->unit))
629 else if (unit && opt->type == AV_OPT_TYPE_CONST)
630 av_log(av_log_obj, AV_LOG_INFO, " %-15s ", opt->name);
632 av_log(av_log_obj, AV_LOG_INFO, "-%-17s ", opt->name);
635 case AV_OPT_TYPE_FLAGS:
636 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<flags>");
638 case AV_OPT_TYPE_INT:
639 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<int>");
641 case AV_OPT_TYPE_INT64:
642 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<int64>");
644 case AV_OPT_TYPE_DOUBLE:
645 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<double>");
647 case AV_OPT_TYPE_FLOAT:
648 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<float>");
650 case AV_OPT_TYPE_STRING:
651 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<string>");
653 case AV_OPT_TYPE_RATIONAL:
654 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<rational>");
656 case AV_OPT_TYPE_BINARY:
657 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<binary>");
659 case AV_OPT_TYPE_IMAGE_SIZE:
660 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<image_size>");
662 case AV_OPT_TYPE_PIXEL_FMT:
663 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<pix_fmt>");
665 case AV_OPT_TYPE_SAMPLE_FMT:
666 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<sample_fmt>");
668 case AV_OPT_TYPE_CONST:
670 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "");
673 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_ENCODING_PARAM) ? 'E' : '.');
674 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_DECODING_PARAM) ? 'D' : '.');
675 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_FILTERING_PARAM)? 'F' : '.');
676 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_VIDEO_PARAM ) ? 'V' : '.');
677 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_AUDIO_PARAM ) ? 'A' : '.');
678 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_SUBTITLE_PARAM) ? 'S' : '.');
681 av_log(av_log_obj, AV_LOG_INFO, " %s", opt->help);
682 av_log(av_log_obj, AV_LOG_INFO, "\n");
683 if (opt->unit && opt->type != AV_OPT_TYPE_CONST) {
684 opt_list(obj, av_log_obj, opt->unit, req_flags, rej_flags);
689 int av_opt_show2(void *obj, void *av_log_obj, int req_flags, int rej_flags)
694 av_log(av_log_obj, AV_LOG_INFO, "%s AVOptions:\n", (*(AVClass**)obj)->class_name);
696 opt_list(obj, av_log_obj, NULL, req_flags, rej_flags);
701 void av_opt_set_defaults(void *s)
703 #if FF_API_OLD_AVOPTIONS
704 av_opt_set_defaults2(s, 0, 0);
707 void av_opt_set_defaults2(void *s, int mask, int flags)
710 const AVOption *opt = NULL;
711 while ((opt = av_opt_next(s, opt)) != NULL) {
712 #if FF_API_OLD_AVOPTIONS
713 if ((opt->flags & mask) != flags)
717 case AV_OPT_TYPE_CONST:
718 /* Nothing to be done here */
720 case AV_OPT_TYPE_FLAGS:
721 case AV_OPT_TYPE_INT:
722 case AV_OPT_TYPE_INT64:
723 av_opt_set_int(s, opt->name, opt->default_val.i64, 0);
725 case AV_OPT_TYPE_DOUBLE:
726 case AV_OPT_TYPE_FLOAT: {
728 val = opt->default_val.dbl;
729 av_opt_set_double(s, opt->name, val, 0);
732 case AV_OPT_TYPE_RATIONAL: {
734 val = av_d2q(opt->default_val.dbl, INT_MAX);
735 av_opt_set_q(s, opt->name, val, 0);
738 case AV_OPT_TYPE_STRING:
739 case AV_OPT_TYPE_IMAGE_SIZE:
740 case AV_OPT_TYPE_PIXEL_FMT:
741 av_opt_set(s, opt->name, opt->default_val.str, 0);
743 case AV_OPT_TYPE_BINARY:
744 /* Cannot set default for binary */
747 av_log(s, AV_LOG_DEBUG, "AVOption type %d of option %s not implemented yet\n", opt->type, opt->name);
753 * Store the value in the field in ctx that is named like key.
754 * ctx must be an AVClass context, storing is done using AVOptions.
756 * @param buf the string to parse, buf will be updated to point at the
757 * separator just after the parsed key/value pair
758 * @param key_val_sep a 0-terminated list of characters used to
759 * separate key from value
760 * @param pairs_sep a 0-terminated list of characters used to separate
761 * two pairs from each other
762 * @return 0 if the key/value pair has been successfully parsed and
763 * set, or a negative value corresponding to an AVERROR code in case
765 * AVERROR(EINVAL) if the key/value pair cannot be parsed,
766 * the error code issued by av_opt_set() if the key/value pair
769 static int parse_key_value_pair(void *ctx, const char **buf,
770 const char *key_val_sep, const char *pairs_sep)
772 char *key = av_get_token(buf, key_val_sep);
776 if (*key && strspn(*buf, key_val_sep)) {
778 val = av_get_token(buf, pairs_sep);
780 av_log(ctx, AV_LOG_ERROR, "Missing key or no key/value separator found after key '%s'\n", key);
782 return AVERROR(EINVAL);
785 av_log(ctx, AV_LOG_DEBUG, "Setting entry with key '%s' to value '%s'\n", key, val);
787 ret = av_opt_set(ctx, key, val, 0);
788 if (ret == AVERROR_OPTION_NOT_FOUND)
789 av_log(ctx, AV_LOG_ERROR, "Key '%s' not found.\n", key);
796 int av_set_options_string(void *ctx, const char *opts,
797 const char *key_val_sep, const char *pairs_sep)
805 if ((ret = parse_key_value_pair(ctx, &opts, key_val_sep, pairs_sep)) < 0)
816 #define WHITESPACES " \n\t"
818 static int is_key_char(char c)
820 return (unsigned)((c | 32) - 'a') < 26 ||
821 (unsigned)(c - '0') < 10 ||
822 c == '-' || c == '_' || c == '/' || c == '.';
826 * Read a key from a string.
828 * The key consists of is_key_char characters and must be terminated by a
829 * character from the delim string; spaces are ignored. The key buffer must
830 * be 4 bytes larger than the longest acceptable key. If the key is too
831 * long, an ellipsis will be written at the end.
833 * @return 0 for success (even with ellipsis), <0 for failure
835 static int get_key(const char **ropts, const char *delim, char *key, unsigned key_size)
837 unsigned key_pos = 0;
838 const char *opts = *ropts;
840 opts += strspn(opts, WHITESPACES);
841 while (is_key_char(*opts)) {
842 key[key_pos++] = *opts;
843 if (key_pos == key_size)
847 opts += strspn(opts, WHITESPACES);
848 if (!*opts || !strchr(delim, *opts))
849 return AVERROR(EINVAL);
852 if (key_pos == key_size)
853 key[key_pos - 4] = key[key_pos - 3] = key[key_pos - 2] = '.';
858 int av_opt_set_from_string(void *ctx, const char *opts,
859 const char *const *shorthand,
860 const char *key_val_sep, const char *pairs_sep)
863 const char *dummy_shorthand = NULL;
864 char key_buf[68], *value;
870 shorthand = &dummy_shorthand;
873 if ((ret = get_key(&opts, key_val_sep, key_buf, sizeof(key_buf))) < 0) {
875 key = *(shorthand++);
877 av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", opts);
878 return AVERROR(EINVAL);
882 while (*shorthand) /* discard all remaining shorthand */
886 if (!(value = av_get_token(&opts, pairs_sep)))
887 return AVERROR(ENOMEM);
888 if (*opts && strchr(pairs_sep, *opts))
891 av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);
892 if ((ret = av_opt_set(ctx, key, value, 0)) < 0) {
893 if (ret == AVERROR_OPTION_NOT_FOUND)
894 av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);
905 void av_opt_free(void *obj)
907 const AVOption *o = NULL;
908 while ((o = av_opt_next(obj, o)))
909 if (o->type == AV_OPT_TYPE_STRING || o->type == AV_OPT_TYPE_BINARY)
910 av_freep((uint8_t *)obj + o->offset);
913 int av_opt_set_dict(void *obj, AVDictionary **options)
915 AVDictionaryEntry *t = NULL;
916 AVDictionary *tmp = NULL;
919 while ((t = av_dict_get(*options, "", t, AV_DICT_IGNORE_SUFFIX))) {
920 ret = av_opt_set(obj, t->key, t->value, 0);
921 if (ret == AVERROR_OPTION_NOT_FOUND)
922 av_dict_set(&tmp, t->key, t->value, 0);
924 av_log(obj, AV_LOG_ERROR, "Error setting option %s to value %s.\n", t->key, t->value);
929 av_dict_free(options);
934 const AVOption *av_opt_find(void *obj, const char *name, const char *unit,
935 int opt_flags, int search_flags)
937 return av_opt_find2(obj, name, unit, opt_flags, search_flags, NULL);
940 const AVOption *av_opt_find2(void *obj, const char *name, const char *unit,
941 int opt_flags, int search_flags, void **target_obj)
944 const AVOption *o = NULL;
951 if (search_flags & AV_OPT_SEARCH_CHILDREN) {
952 if (search_flags & AV_OPT_SEARCH_FAKE_OBJ) {
953 const AVClass *child = NULL;
954 while (child = av_opt_child_class_next(c, child))
955 if (o = av_opt_find2(&child, name, unit, opt_flags, search_flags, NULL))
959 while (child = av_opt_child_next(obj, child))
960 if (o = av_opt_find2(child, name, unit, opt_flags, search_flags, target_obj))
965 while (o = av_opt_next(obj, o)) {
966 if (!strcmp(o->name, name) && (o->flags & opt_flags) == opt_flags &&
967 ((!unit && o->type != AV_OPT_TYPE_CONST) ||
968 (unit && o->type == AV_OPT_TYPE_CONST && o->unit && !strcmp(o->unit, unit)))) {
970 if (!(search_flags & AV_OPT_SEARCH_FAKE_OBJ))
981 void *av_opt_child_next(void *obj, void *prev)
983 const AVClass *c = *(AVClass**)obj;
985 return c->child_next(obj, prev);
989 const AVClass *av_opt_child_class_next(const AVClass *parent, const AVClass *prev)
991 if (parent->child_class_next)
992 return parent->child_class_next(prev);
996 void *av_opt_ptr(const AVClass *class, void *obj, const char *name)
998 const AVOption *opt= av_opt_find2(&class, name, NULL, 0, AV_OPT_SEARCH_FAKE_OBJ, NULL);
1001 return (uint8_t*)obj + opt->offset;
1008 typedef struct TestContext
1010 const AVClass *class;
1015 AVRational rational;
1017 enum AVPixelFormat pix_fmt;
1018 enum AVSampleFormat sample_fmt;
1021 #define OFFSET(x) offsetof(TestContext, x)
1023 #define TEST_FLAG_COOL 01
1024 #define TEST_FLAG_LAME 02
1025 #define TEST_FLAG_MU 04
1027 static const AVOption test_options[]= {
1028 {"num", "set num", OFFSET(num), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 100 },
1029 {"toggle", "set toggle", OFFSET(toggle), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1 },
1030 {"rational", "set rational", OFFSET(rational), AV_OPT_TYPE_RATIONAL, {.dbl = 0}, 0, 10 },
1031 {"string", "set string", OFFSET(string), AV_OPT_TYPE_STRING, {0}, CHAR_MIN, CHAR_MAX },
1032 {"flags", "set flags", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, 0, INT_MAX, 0, "flags" },
1033 {"cool", "set cool flag ", 0, AV_OPT_TYPE_CONST, {.i64 = TEST_FLAG_COOL}, INT_MIN, INT_MAX, 0, "flags" },
1034 {"lame", "set lame flag ", 0, AV_OPT_TYPE_CONST, {.i64 = TEST_FLAG_LAME}, INT_MIN, INT_MAX, 0, "flags" },
1035 {"mu", "set mu flag ", 0, AV_OPT_TYPE_CONST, {.i64 = TEST_FLAG_MU}, INT_MIN, INT_MAX, 0, "flags" },
1036 {"size", "set size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE,{0}, 0, 0 },
1037 {"pix_fmt", "set pixfmt", OFFSET(pix_fmt), AV_OPT_TYPE_PIXEL_FMT,{0}, 0, 0 },
1038 {"sample_fmt", "set samplefmt", OFFSET(sample_fmt), AV_OPT_TYPE_SAMPLE_FMT,{0}, 0, 0 },
1042 static const char *test_get_name(void *ctx)
1047 static const AVClass test_class = {
1057 printf("\nTesting av_set_options_string()\n");
1059 TestContext test_ctx = { 0 };
1060 const char *options[] = {
1076 "flags=+mu-lame : num=42: toggle=0",
1077 "num=42 : string=blahblah",
1078 "rational=0 : rational=1/2 : rational=1/-1",
1091 test_ctx.class = &test_class;
1092 av_opt_set_defaults(&test_ctx);
1093 test_ctx.string = av_strdup("default");
1095 av_log_set_level(AV_LOG_DEBUG);
1097 for (i=0; i < FF_ARRAY_ELEMS(options); i++) {
1098 av_log(&test_ctx, AV_LOG_DEBUG, "Setting options string '%s'\n", options[i]);
1099 if (av_set_options_string(&test_ctx, options[i], "=", ":") < 0)
1100 av_log(&test_ctx, AV_LOG_ERROR, "Error setting options string: '%s'\n", options[i]);
1103 av_freep(&test_ctx.string);
1106 printf("\nTesting av_opt_set_from_string()\n");
1108 TestContext test_ctx = { 0 };
1109 const char *options[] = {
1117 " 5 : hello : size = pal ",
1118 "a_very_long_option_name_that_will_need_to_be_ellipsized_around_here=42"
1120 const char *shorthand[] = { "num", "string", NULL };
1122 test_ctx.class = &test_class;
1123 av_opt_set_defaults(&test_ctx);
1124 test_ctx.string = av_strdup("default");
1126 av_log_set_level(AV_LOG_DEBUG);
1128 for (i=0; i < FF_ARRAY_ELEMS(options); i++) {
1129 av_log(&test_ctx, AV_LOG_DEBUG, "Setting options string '%s'\n", options[i]);
1130 if (av_opt_set_from_string(&test_ctx, options[i], shorthand, "=", ":") < 0)
1131 av_log(&test_ctx, AV_LOG_ERROR, "Error setting options string: '%s'\n", options[i]);
1134 av_freep(&test_ctx.string);