3 * Copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at>
5 * This file is part of Libav.
7 * Libav 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 * Libav 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 Libav; 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>
33 //FIXME order them and do a bin search
34 const AVOption *av_find_opt(void *v, const char *name, const char *unit, int mask, int flags)
36 AVClass *c= *(AVClass**)v; //FIXME silly way of storing AVClass
37 const AVOption *o= c->option;
39 for (; o && o->name; o++) {
40 if (!strcmp(o->name, name) && (!unit || (o->unit && !strcmp(o->unit, unit))) && (o->flags & mask) == flags)
46 const AVOption *av_next_option(void *obj, const AVOption *last)
48 if (last && last[1].name) return ++last;
49 else if (last) return NULL;
50 else return (*(AVClass**)obj)->option;
53 static int av_set_number2(void *obj, const char *name, double num, int den, int64_t intnum, const AVOption **o_out)
55 const AVOption *o= av_find_opt(obj, name, NULL, 0, 0);
59 if (!o || o->offset<=0)
60 return AVERROR_OPTION_NOT_FOUND;
62 if (o->max*den < num*intnum || o->min*den > num*intnum) {
63 av_log(obj, AV_LOG_ERROR, "Value %lf for parameter '%s' out of range\n", num, name);
64 return AVERROR(ERANGE);
67 dst= ((uint8_t*)obj) + o->offset;
70 case FF_OPT_TYPE_FLAGS:
71 case FF_OPT_TYPE_INT: *(int *)dst= llrint(num/den)*intnum; break;
72 case FF_OPT_TYPE_INT64: *(int64_t *)dst= llrint(num/den)*intnum; break;
73 case FF_OPT_TYPE_FLOAT: *(float *)dst= num*intnum/den; break;
74 case FF_OPT_TYPE_DOUBLE:*(double *)dst= num*intnum/den; break;
75 case FF_OPT_TYPE_RATIONAL:
76 if ((int)num == num) *(AVRational*)dst= (AVRational){num*intnum, den};
77 else *(AVRational*)dst= av_d2q(num*intnum/den, 1<<24);
80 return AVERROR(EINVAL);
85 static const AVOption *av_set_number(void *obj, const char *name, double num, int den, int64_t intnum)
87 const AVOption *o = NULL;
88 if (av_set_number2(obj, name, num, den, intnum, &o) < 0)
94 static const double const_values[] = {
101 static const char * const const_names[] = {
108 static int hexchar2int(char c) {
109 if (c >= '0' && c <= '9') return c - '0';
110 if (c >= 'a' && c <= 'f') return c - 'a' + 10;
111 if (c >= 'A' && c <= 'F') return c - 'A' + 10;
115 int av_set_string3(void *obj, const char *name, const char *val, int alloc, const AVOption **o_out)
118 const AVOption *o= av_find_opt(obj, name, NULL, 0, 0);
122 return AVERROR_OPTION_NOT_FOUND;
123 if (!val || o->offset<=0)
124 return AVERROR(EINVAL);
126 if (o->type == FF_OPT_TYPE_BINARY) {
127 uint8_t **dst = (uint8_t **)(((uint8_t*)obj) + o->offset);
128 int *lendst = (int *)(dst + 1);
130 int len = strlen(val);
133 if (len & 1) return AVERROR(EINVAL);
135 ptr = bin = av_malloc(len);
137 int a = hexchar2int(*val++);
138 int b = hexchar2int(*val++);
139 if (a < 0 || b < 0) {
141 return AVERROR(EINVAL);
143 *ptr++ = (a << 4) | b;
149 if (o->type != FF_OPT_TYPE_STRING) {
157 if (*val == '+' || *val == '-')
160 for (i=0; i<sizeof(buf)-1 && val[i] && val[i]!='+' && val[i]!='-'; i++)
165 const AVOption *o_named= av_find_opt(obj, buf, o->unit, 0, 0);
166 if (o_named && o_named->type == FF_OPT_TYPE_CONST)
167 d= o_named->default_val.dbl;
168 else if (!strcmp(buf, "default")) d= o->default_val.dbl;
169 else if (!strcmp(buf, "max" )) d= o->max;
170 else if (!strcmp(buf, "min" )) d= o->min;
171 else if (!strcmp(buf, "none" )) d= 0;
172 else if (!strcmp(buf, "all" )) d= ~0;
174 int res = av_expr_parse_and_eval(&d, buf, const_names, const_values, NULL, NULL, NULL, NULL, NULL, 0, obj);
176 av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\"\n", val);
181 if (o->type == FF_OPT_TYPE_FLAGS) {
182 if (cmd=='+') d= av_get_int(obj, name, NULL) | (int64_t)d;
183 else if (cmd=='-') d= av_get_int(obj, name, NULL) &~(int64_t)d;
185 if (cmd=='+') d= notfirst*av_get_double(obj, name, NULL) + d;
186 else if (cmd=='-') d= notfirst*av_get_double(obj, name, NULL) - d;
189 if ((ret = av_set_number2(obj, name, d, 1, 1, o_out)) < 0)
196 return AVERROR(EINVAL);
200 av_free(*(void**)(((uint8_t*)obj) + o->offset));
204 memcpy(((uint8_t*)obj) + o->offset, &val, sizeof(val));
208 const AVOption *av_set_double(void *obj, const char *name, double n)
210 return av_set_number(obj, name, n, 1, 1);
213 const AVOption *av_set_q(void *obj, const char *name, AVRational n)
215 return av_set_number(obj, name, n.num, n.den, 1);
218 const AVOption *av_set_int(void *obj, const char *name, int64_t n)
220 return av_set_number(obj, name, 1, 1, n);
225 * @param buf a buffer which is used for returning non string values as strings, can be NULL
226 * @param buf_len allocated length in bytes of buf
228 const char *av_get_string(void *obj, const char *name, const AVOption **o_out, char *buf, int buf_len)
230 const AVOption *o= av_find_opt(obj, name, NULL, 0, 0);
234 if (!o || o->offset<=0)
236 if (o->type != FF_OPT_TYPE_STRING && (!buf || !buf_len))
239 dst= ((uint8_t*)obj) + o->offset;
240 if (o_out) *o_out= o;
243 case FF_OPT_TYPE_FLAGS: snprintf(buf, buf_len, "0x%08X",*(int *)dst);break;
244 case FF_OPT_TYPE_INT: snprintf(buf, buf_len, "%d" , *(int *)dst);break;
245 case FF_OPT_TYPE_INT64: snprintf(buf, buf_len, "%"PRId64, *(int64_t*)dst);break;
246 case FF_OPT_TYPE_FLOAT: snprintf(buf, buf_len, "%f" , *(float *)dst);break;
247 case FF_OPT_TYPE_DOUBLE: snprintf(buf, buf_len, "%f" , *(double *)dst);break;
248 case FF_OPT_TYPE_RATIONAL: snprintf(buf, buf_len, "%d/%d", ((AVRational*)dst)->num, ((AVRational*)dst)->den);break;
249 case FF_OPT_TYPE_STRING: return *(void**)dst;
250 case FF_OPT_TYPE_BINARY:
251 len = *(int*)(((uint8_t *)dst) + sizeof(uint8_t *));
252 if (len >= (buf_len + 1)/2) return NULL;
253 bin = *(uint8_t**)dst;
254 for (i = 0; i < len; i++) snprintf(buf + i*2, 3, "%02X", bin[i]);
256 default: return NULL;
261 static int av_get_number(void *obj, const char *name, const AVOption **o_out, double *num, int *den, int64_t *intnum)
263 const AVOption *o= av_find_opt(obj, name, NULL, 0, 0);
265 if (!o || o->offset<=0)
268 dst= ((uint8_t*)obj) + o->offset;
270 if (o_out) *o_out= o;
273 case FF_OPT_TYPE_FLAGS: *intnum= *(unsigned int*)dst;return 0;
274 case FF_OPT_TYPE_INT: *intnum= *(int *)dst;return 0;
275 case FF_OPT_TYPE_INT64: *intnum= *(int64_t*)dst;return 0;
276 case FF_OPT_TYPE_FLOAT: *num= *(float *)dst;return 0;
277 case FF_OPT_TYPE_DOUBLE: *num= *(double *)dst;return 0;
278 case FF_OPT_TYPE_RATIONAL: *intnum= ((AVRational*)dst)->num;
279 *den = ((AVRational*)dst)->den;
287 double av_get_double(void *obj, const char *name, const AVOption **o_out)
293 if (av_get_number(obj, name, o_out, &num, &den, &intnum) < 0)
295 return num*intnum/den;
298 AVRational av_get_q(void *obj, const char *name, const AVOption **o_out)
304 if (av_get_number(obj, name, o_out, &num, &den, &intnum) < 0)
305 return (AVRational){0, 0};
306 if (num == 1.0 && (int)intnum == intnum)
307 return (AVRational){intnum, den};
309 return av_d2q(num*intnum/den, 1<<24);
312 int64_t av_get_int(void *obj, const char *name, const AVOption **o_out)
318 if (av_get_number(obj, name, o_out, &num, &den, &intnum) < 0)
320 return num*intnum/den;
323 static void opt_list(void *obj, void *av_log_obj, const char *unit,
324 int req_flags, int rej_flags)
326 const AVOption *opt=NULL;
328 while ((opt= av_next_option(obj, opt))) {
329 if (!(opt->flags & req_flags) || (opt->flags & rej_flags))
332 /* Don't print CONST's on level one.
333 * Don't print anything but CONST's on level two.
334 * Only print items from the requested unit.
336 if (!unit && opt->type==FF_OPT_TYPE_CONST)
338 else if (unit && opt->type!=FF_OPT_TYPE_CONST)
340 else if (unit && opt->type==FF_OPT_TYPE_CONST && strcmp(unit, opt->unit))
342 else if (unit && opt->type == FF_OPT_TYPE_CONST)
343 av_log(av_log_obj, AV_LOG_INFO, " %-15s ", opt->name);
345 av_log(av_log_obj, AV_LOG_INFO, "-%-17s ", opt->name);
348 case FF_OPT_TYPE_FLAGS:
349 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<flags>");
351 case FF_OPT_TYPE_INT:
352 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<int>");
354 case FF_OPT_TYPE_INT64:
355 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<int64>");
357 case FF_OPT_TYPE_DOUBLE:
358 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<double>");
360 case FF_OPT_TYPE_FLOAT:
361 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<float>");
363 case FF_OPT_TYPE_STRING:
364 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<string>");
366 case FF_OPT_TYPE_RATIONAL:
367 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<rational>");
369 case FF_OPT_TYPE_BINARY:
370 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<binary>");
372 case FF_OPT_TYPE_CONST:
374 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "");
377 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_ENCODING_PARAM) ? 'E' : '.');
378 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_DECODING_PARAM) ? 'D' : '.');
379 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_VIDEO_PARAM ) ? 'V' : '.');
380 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_AUDIO_PARAM ) ? 'A' : '.');
381 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_SUBTITLE_PARAM) ? 'S' : '.');
384 av_log(av_log_obj, AV_LOG_INFO, " %s", opt->help);
385 av_log(av_log_obj, AV_LOG_INFO, "\n");
386 if (opt->unit && opt->type != FF_OPT_TYPE_CONST) {
387 opt_list(obj, av_log_obj, opt->unit, req_flags, rej_flags);
392 int av_opt_show2(void *obj, void *av_log_obj, int req_flags, int rej_flags)
397 av_log(av_log_obj, AV_LOG_INFO, "%s AVOptions:\n", (*(AVClass**)obj)->class_name);
399 opt_list(obj, av_log_obj, NULL, req_flags, rej_flags);
404 /** Set the values of the AVCodecContext or AVFormatContext structure.
405 * They are set to the defaults specified in the according AVOption options
406 * array default_val field.
408 * @param s AVCodecContext or AVFormatContext for which the defaults will be set
410 void av_opt_set_defaults2(void *s, int mask, int flags)
412 const AVOption *opt = NULL;
413 while ((opt = av_next_option(s, opt)) != NULL) {
414 if ((opt->flags & mask) != flags)
417 case FF_OPT_TYPE_CONST:
418 /* Nothing to be done here */
420 case FF_OPT_TYPE_FLAGS:
421 case FF_OPT_TYPE_INT: {
423 val = opt->default_val.dbl;
424 av_set_int(s, opt->name, val);
427 case FF_OPT_TYPE_INT64:
428 if ((double)(opt->default_val.dbl+0.6) == opt->default_val.dbl)
429 av_log(s, AV_LOG_DEBUG, "loss of precision in default of %s\n", opt->name);
430 av_set_int(s, opt->name, opt->default_val.dbl);
432 case FF_OPT_TYPE_DOUBLE:
433 case FF_OPT_TYPE_FLOAT: {
435 val = opt->default_val.dbl;
436 av_set_double(s, opt->name, val);
439 case FF_OPT_TYPE_RATIONAL: {
441 val = av_d2q(opt->default_val.dbl, INT_MAX);
442 av_set_q(s, opt->name, val);
445 case FF_OPT_TYPE_STRING:
446 av_set_string3(s, opt->name, opt->default_val.str, 1, NULL);
448 case FF_OPT_TYPE_BINARY:
449 /* Cannot set default for binary */
452 av_log(s, AV_LOG_DEBUG, "AVOption type %d of option %s not implemented yet\n", opt->type, opt->name);
457 void av_opt_set_defaults(void *s)
459 av_opt_set_defaults2(s, 0, 0);
463 * Store the value in the field in ctx that is named like key.
464 * ctx must be an AVClass context, storing is done using AVOptions.
466 * @param buf the string to parse, buf will be updated to point at the
467 * separator just after the parsed key/value pair
468 * @param key_val_sep a 0-terminated list of characters used to
469 * separate key from value
470 * @param pairs_sep a 0-terminated list of characters used to separate
471 * two pairs from each other
472 * @return 0 if the key/value pair has been successfully parsed and
473 * set, or a negative value corresponding to an AVERROR code in case
475 * AVERROR(EINVAL) if the key/value pair cannot be parsed,
476 * the error code issued by av_set_string3() if the key/value pair
479 static int parse_key_value_pair(void *ctx, const char **buf,
480 const char *key_val_sep, const char *pairs_sep)
482 char *key = av_get_token(buf, key_val_sep);
486 if (*key && strspn(*buf, key_val_sep)) {
488 val = av_get_token(buf, pairs_sep);
490 av_log(ctx, AV_LOG_ERROR, "Missing key or no key/value separator found after key '%s'\n", key);
492 return AVERROR(EINVAL);
495 av_log(ctx, AV_LOG_DEBUG, "Setting value '%s' for key '%s'\n", val, key);
497 ret = av_set_string3(ctx, key, val, 1, NULL);
498 if (ret == AVERROR_OPTION_NOT_FOUND)
499 av_log(ctx, AV_LOG_ERROR, "Key '%s' not found.\n", key);
506 int av_set_options_string(void *ctx, const char *opts,
507 const char *key_val_sep, const char *pairs_sep)
512 if ((ret = parse_key_value_pair(ctx, &opts, key_val_sep, pairs_sep)) < 0)
527 typedef struct TestContext
529 const AVClass *class;
537 #define OFFSET(x) offsetof(TestContext, x)
539 #define TEST_FLAG_COOL 01
540 #define TEST_FLAG_LAME 02
541 #define TEST_FLAG_MU 04
543 static const AVOption test_options[]= {
544 {"num", "set num", OFFSET(num), FF_OPT_TYPE_INT, 0, 0, 100 },
545 {"toggle", "set toggle", OFFSET(toggle), FF_OPT_TYPE_INT, 0, 0, 1 },
546 {"rational", "set rational", OFFSET(rational), FF_OPT_TYPE_RATIONAL, 0, 0, 10 },
547 {"string", "set string", OFFSET(string), FF_OPT_TYPE_STRING, 0, CHAR_MIN, CHAR_MAX },
548 {"flags", "set flags", OFFSET(flags), FF_OPT_TYPE_FLAGS, 0, 0, INT_MAX, 0, "flags" },
549 {"cool", "set cool flag ", 0, FF_OPT_TYPE_CONST, TEST_FLAG_COOL, INT_MIN, INT_MAX, 0, "flags" },
550 {"lame", "set lame flag ", 0, FF_OPT_TYPE_CONST, TEST_FLAG_LAME, INT_MIN, INT_MAX, 0, "flags" },
551 {"mu", "set mu flag ", 0, FF_OPT_TYPE_CONST, TEST_FLAG_MU, INT_MIN, INT_MAX, 0, "flags" },
555 static const char *test_get_name(void *ctx)
560 static const AVClass test_class = {
570 printf("\nTesting av_set_options_string()\n");
572 TestContext test_ctx;
573 const char *options[] = {
589 "flags=+mu-lame : num=42: toggle=0",
590 "num=42 : string=blahblah",
591 "rational=0 : rational=1/2 : rational=1/-1",
595 test_ctx.class = &test_class;
596 av_opt_set_defaults2(&test_ctx, 0, 0);
597 test_ctx.string = av_strdup("default");
599 av_log_set_level(AV_LOG_DEBUG);
601 for (i=0; i < FF_ARRAY_ELEMS(options); i++) {
602 av_log(&test_ctx, AV_LOG_DEBUG, "Setting options string '%s'\n", options[i]);
603 if (av_set_options_string(&test_ctx, options[i], "=", ":") < 0)
604 av_log(&test_ctx, AV_LOG_ERROR, "Error setting options string: '%s'\n", options[i]);