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>
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 const AVOption *o = NULL;
38 while ((o = av_next_option(v, o))) {
39 if (!strcmp(o->name, name) && (!unit || (o->unit && !strcmp(o->unit, unit))) && (o->flags & mask) == flags)
45 const AVOption *av_next_option(void *obj, const AVOption *last)
47 if (last && last[1].name) return ++last;
48 else if (last) return NULL;
49 else return (*(AVClass**)obj)->option;
52 static int av_set_number2(void *obj, const char *name, double num, int den, int64_t intnum, const AVOption **o_out)
54 const AVOption *o= av_find_opt(obj, name, NULL, 0, 0);
58 if (!o || o->offset<=0)
59 return AVERROR_OPTION_NOT_FOUND;
61 if (o->max*den < num*intnum || o->min*den > num*intnum) {
62 av_log(obj, AV_LOG_ERROR, "Value %lf for parameter '%s' out of range\n", num, name);
63 return AVERROR(ERANGE);
66 dst= ((uint8_t*)obj) + o->offset;
69 case FF_OPT_TYPE_FLAGS:
70 case FF_OPT_TYPE_INT: *(int *)dst= llrint(num/den)*intnum; break;
71 case FF_OPT_TYPE_INT64: *(int64_t *)dst= llrint(num/den)*intnum; break;
72 case FF_OPT_TYPE_FLOAT: *(float *)dst= num*intnum/den; break;
73 case FF_OPT_TYPE_DOUBLE:*(double *)dst= num*intnum/den; break;
74 case FF_OPT_TYPE_RATIONAL:
75 if ((int)num == num) *(AVRational*)dst= (AVRational){num*intnum, den};
76 else *(AVRational*)dst= av_d2q(num*intnum/den, 1<<24);
79 return AVERROR(EINVAL);
84 static const AVOption *av_set_number(void *obj, const char *name, double num, int den, int64_t intnum)
86 const AVOption *o = NULL;
87 if (av_set_number2(obj, name, num, den, intnum, &o) < 0)
93 static const double const_values[] = {
100 static const char * const const_names[] = {
107 static int hexchar2int(char c) {
108 if (c >= '0' && c <= '9') return c - '0';
109 if (c >= 'a' && c <= 'f') return c - 'a' + 10;
110 if (c >= 'A' && c <= 'F') return c - 'A' + 10;
114 int av_set_string3(void *obj, const char *name, const char *val, int alloc, const AVOption **o_out)
117 const AVOption *o= av_find_opt(obj, name, NULL, 0, 0);
121 return AVERROR_OPTION_NOT_FOUND;
122 if ((!val && o->type != FF_OPT_TYPE_STRING) || o->offset<=0)
123 return AVERROR(EINVAL);
125 if (o->type == FF_OPT_TYPE_BINARY) {
126 uint8_t **dst = (uint8_t **)(((uint8_t*)obj) + o->offset);
127 int *lendst = (int *)(dst + 1);
129 int len = strlen(val);
132 if (len & 1) return AVERROR(EINVAL);
134 ptr = bin = av_malloc(len);
136 int a = hexchar2int(*val++);
137 int b = hexchar2int(*val++);
138 if (a < 0 || b < 0) {
140 return AVERROR(EINVAL);
142 *ptr++ = (a << 4) | b;
148 if (o->type != FF_OPT_TYPE_STRING) {
156 if (*val == '+' || *val == '-')
159 for (i=0; i<sizeof(buf)-1 && val[i] && val[i]!='+' && val[i]!='-'; i++)
164 const AVOption *o_named= av_find_opt(obj, buf, o->unit, 0, 0);
165 if (o_named && o_named->type == FF_OPT_TYPE_CONST)
166 d= o_named->default_val.dbl;
167 else if (!strcmp(buf, "default")) d= o->default_val.dbl;
168 else if (!strcmp(buf, "max" )) d= o->max;
169 else if (!strcmp(buf, "min" )) d= o->min;
170 else if (!strcmp(buf, "none" )) d= 0;
171 else if (!strcmp(buf, "all" )) d= ~0;
173 int res = av_expr_parse_and_eval(&d, buf, const_names, const_values, NULL, NULL, NULL, NULL, NULL, 0, obj);
175 av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\"\n", val);
180 if (o->type == FF_OPT_TYPE_FLAGS) {
181 if (cmd=='+') d= av_get_int(obj, name, NULL) | (int64_t)d;
182 else if (cmd=='-') d= av_get_int(obj, name, NULL) &~(int64_t)d;
184 if (cmd=='+') d= notfirst*av_get_double(obj, name, NULL) + d;
185 else if (cmd=='-') d= notfirst*av_get_double(obj, name, NULL) - d;
188 if ((ret = av_set_number2(obj, name, d, 1, 1, o_out)) < 0)
195 return AVERROR(EINVAL);
199 av_free(*(void**)(((uint8_t*)obj) + o->offset));
203 memcpy(((uint8_t*)obj) + o->offset, &val, sizeof(val));
207 const AVOption *av_set_double(void *obj, const char *name, double n)
209 return av_set_number(obj, name, n, 1, 1);
212 const AVOption *av_set_q(void *obj, const char *name, AVRational n)
214 return av_set_number(obj, name, n.num, n.den, 1);
217 const AVOption *av_set_int(void *obj, const char *name, int64_t n)
219 return av_set_number(obj, name, 1, 1, n);
224 * @param buf a buffer which is used for returning non string values as strings, can be NULL
225 * @param buf_len allocated length in bytes of buf
227 const char *av_get_string(void *obj, const char *name, const AVOption **o_out, char *buf, int buf_len)
229 const AVOption *o= av_find_opt(obj, name, NULL, 0, 0);
233 if (!o || o->offset<=0)
235 if (o->type != FF_OPT_TYPE_STRING && (!buf || !buf_len))
238 dst= ((uint8_t*)obj) + o->offset;
239 if (o_out) *o_out= o;
242 case FF_OPT_TYPE_FLAGS: snprintf(buf, buf_len, "0x%08X",*(int *)dst);break;
243 case FF_OPT_TYPE_INT: snprintf(buf, buf_len, "%d" , *(int *)dst);break;
244 case FF_OPT_TYPE_INT64: snprintf(buf, buf_len, "%"PRId64, *(int64_t*)dst);break;
245 case FF_OPT_TYPE_FLOAT: snprintf(buf, buf_len, "%f" , *(float *)dst);break;
246 case FF_OPT_TYPE_DOUBLE: snprintf(buf, buf_len, "%f" , *(double *)dst);break;
247 case FF_OPT_TYPE_RATIONAL: snprintf(buf, buf_len, "%d/%d", ((AVRational*)dst)->num, ((AVRational*)dst)->den);break;
248 case FF_OPT_TYPE_STRING: return *(void**)dst;
249 case FF_OPT_TYPE_BINARY:
250 len = *(int*)(((uint8_t *)dst) + sizeof(uint8_t *));
251 if (len >= (buf_len + 1)/2) return NULL;
252 bin = *(uint8_t**)dst;
253 for (i = 0; i < len; i++) snprintf(buf + i*2, 3, "%02X", bin[i]);
255 default: return NULL;
260 static int av_get_number(void *obj, const char *name, const AVOption **o_out, double *num, int *den, int64_t *intnum)
262 const AVOption *o= av_find_opt(obj, name, NULL, 0, 0);
264 if (!o || (o->offset<=0 && o->type != FF_OPT_TYPE_CONST))
267 dst= ((uint8_t*)obj) + o->offset;
269 if (o_out) *o_out= o;
272 case FF_OPT_TYPE_FLAGS: *intnum= *(unsigned int*)dst;return 0;
273 case FF_OPT_TYPE_INT: *intnum= *(int *)dst;return 0;
274 case FF_OPT_TYPE_INT64: *intnum= *(int64_t*)dst;return 0;
275 case FF_OPT_TYPE_FLOAT: *num= *(float *)dst;return 0;
276 case FF_OPT_TYPE_DOUBLE: *num= *(double *)dst;return 0;
277 case FF_OPT_TYPE_RATIONAL: *intnum= ((AVRational*)dst)->num;
278 *den = ((AVRational*)dst)->den;
280 case FF_OPT_TYPE_CONST: *intnum= o->default_val.dbl;return 0;
287 double av_get_double(void *obj, const char *name, const AVOption **o_out)
293 av_get_number(obj, name, o_out, &num, &den, &intnum);
294 return num*intnum/den;
297 AVRational av_get_q(void *obj, const char *name, const AVOption **o_out)
303 av_get_number(obj, name, o_out, &num, &den, &intnum);
304 if (num == 1.0 && (int)intnum == intnum)
305 return (AVRational){intnum, den};
307 return av_d2q(num*intnum/den, 1<<24);
310 int64_t av_get_int(void *obj, const char *name, const AVOption **o_out)
316 if (av_get_number(obj, name, o_out, &num, &den, &intnum) < 0)
318 return num*intnum/den;
321 static void opt_list(void *obj, void *av_log_obj, const char *unit,
322 int req_flags, int rej_flags)
324 const AVOption *opt=NULL;
326 while ((opt= av_next_option(obj, opt))) {
327 if (!(opt->flags & req_flags) || (opt->flags & rej_flags))
330 /* Don't print CONST's on level one.
331 * Don't print anything but CONST's on level two.
332 * Only print items from the requested unit.
334 if (!unit && opt->type==FF_OPT_TYPE_CONST)
336 else if (unit && opt->type!=FF_OPT_TYPE_CONST)
338 else if (unit && opt->type==FF_OPT_TYPE_CONST && strcmp(unit, opt->unit))
340 else if (unit && opt->type == FF_OPT_TYPE_CONST)
341 av_log(av_log_obj, AV_LOG_INFO, " %-15s ", opt->name);
343 av_log(av_log_obj, AV_LOG_INFO, "-%-17s ", opt->name);
346 case FF_OPT_TYPE_FLAGS:
347 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<flags>");
349 case FF_OPT_TYPE_INT:
350 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<int>");
352 case FF_OPT_TYPE_INT64:
353 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<int64>");
355 case FF_OPT_TYPE_DOUBLE:
356 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<double>");
358 case FF_OPT_TYPE_FLOAT:
359 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<float>");
361 case FF_OPT_TYPE_STRING:
362 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<string>");
364 case FF_OPT_TYPE_RATIONAL:
365 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<rational>");
367 case FF_OPT_TYPE_BINARY:
368 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<binary>");
370 case FF_OPT_TYPE_CONST:
372 av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "");
375 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_ENCODING_PARAM) ? 'E' : '.');
376 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_DECODING_PARAM) ? 'D' : '.');
377 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_VIDEO_PARAM ) ? 'V' : '.');
378 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_AUDIO_PARAM ) ? 'A' : '.');
379 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_SUBTITLE_PARAM) ? 'S' : '.');
382 av_log(av_log_obj, AV_LOG_INFO, " %s", opt->help);
383 av_log(av_log_obj, AV_LOG_INFO, "\n");
384 if (opt->unit && opt->type != FF_OPT_TYPE_CONST) {
385 opt_list(obj, av_log_obj, opt->unit, req_flags, rej_flags);
390 int av_opt_show2(void *obj, void *av_log_obj, int req_flags, int rej_flags)
395 av_log(av_log_obj, AV_LOG_INFO, "%s AVOptions:\n", (*(AVClass**)obj)->class_name);
397 opt_list(obj, av_log_obj, NULL, req_flags, rej_flags);
402 /** Set the values of the AVCodecContext or AVFormatContext structure.
403 * They are set to the defaults specified in the according AVOption options
404 * array default_val field.
406 * @param s AVCodecContext or AVFormatContext for which the defaults will be set
408 void av_opt_set_defaults2(void *s, int mask, int flags)
410 const AVOption *opt = NULL;
411 while ((opt = av_next_option(s, opt)) != NULL) {
412 if ((opt->flags & mask) != flags)
415 case FF_OPT_TYPE_CONST:
416 /* Nothing to be done here */
418 case FF_OPT_TYPE_FLAGS:
419 case FF_OPT_TYPE_INT: {
421 val = opt->default_val.dbl;
422 av_set_int(s, opt->name, val);
425 case FF_OPT_TYPE_INT64:
426 if ((double)(opt->default_val.dbl+0.6) == opt->default_val.dbl)
427 av_log(s, AV_LOG_DEBUG, "loss of precision in default of %s\n", opt->name);
428 av_set_int(s, opt->name, opt->default_val.dbl);
430 case FF_OPT_TYPE_DOUBLE:
431 case FF_OPT_TYPE_FLOAT: {
433 val = opt->default_val.dbl;
434 av_set_double(s, opt->name, val);
437 case FF_OPT_TYPE_RATIONAL: {
439 val = av_d2q(opt->default_val.dbl, INT_MAX);
440 av_set_q(s, opt->name, val);
443 case FF_OPT_TYPE_STRING:
444 case FF_OPT_TYPE_BINARY:
445 /* Cannot set default for string as default_val is of type * double */
448 av_log(s, AV_LOG_DEBUG, "AVOption type %d of option %s not implemented yet\n", opt->type, opt->name);
453 void av_opt_set_defaults(void *s)
455 av_opt_set_defaults2(s, 0, 0);
459 * Store the value in the field in ctx that is named like key.
460 * ctx must be an AVClass context, storing is done using AVOptions.
462 * @param buf the string to parse, buf will be updated to point at the
463 * separator just after the parsed key/value pair
464 * @param key_val_sep a 0-terminated list of characters used to
465 * separate key from value
466 * @param pairs_sep a 0-terminated list of characters used to separate
467 * two pairs from each other
468 * @return 0 if the key/value pair has been successfully parsed and
469 * set, or a negative value corresponding to an AVERROR code in case
471 * AVERROR(EINVAL) if the key/value pair cannot be parsed,
472 * the error code issued by av_set_string3() if the key/value pair
475 static int parse_key_value_pair(void *ctx, const char **buf,
476 const char *key_val_sep, const char *pairs_sep)
478 char *key = av_get_token(buf, key_val_sep);
482 if (*key && strspn(*buf, key_val_sep)) {
484 val = av_get_token(buf, pairs_sep);
486 av_log(ctx, AV_LOG_ERROR, "Missing key or no key/value separator found after key '%s'\n", key);
488 return AVERROR(EINVAL);
491 av_log(ctx, AV_LOG_DEBUG, "Setting value '%s' for key '%s'\n", val, key);
493 ret = av_set_string3(ctx, key, val, 1, NULL);
494 if (ret == AVERROR_OPTION_NOT_FOUND)
495 av_log(ctx, AV_LOG_ERROR, "Key '%s' not found.\n", key);
502 int av_set_options_string(void *ctx, const char *opts,
503 const char *key_val_sep, const char *pairs_sep)
508 if ((ret = parse_key_value_pair(ctx, &opts, key_val_sep, pairs_sep)) < 0)
523 typedef struct TestContext
525 const AVClass *class;
533 #define OFFSET(x) offsetof(TestContext, x)
535 #define TEST_FLAG_COOL 01
536 #define TEST_FLAG_LAME 02
537 #define TEST_FLAG_MU 04
539 static const AVOption test_options[]= {
540 {"num", "set num", OFFSET(num), FF_OPT_TYPE_INT, 0, 0, 100 },
541 {"toggle", "set toggle", OFFSET(toggle), FF_OPT_TYPE_INT, 0, 0, 1 },
542 {"rational", "set rational", OFFSET(rational), FF_OPT_TYPE_RATIONAL, 0, 0, 10 },
543 {"string", "set string", OFFSET(string), FF_OPT_TYPE_STRING, 0, CHAR_MIN, CHAR_MAX },
544 {"flags", "set flags", OFFSET(flags), FF_OPT_TYPE_FLAGS, 0, 0, INT_MAX, 0, "flags" },
545 {"cool", "set cool flag ", 0, FF_OPT_TYPE_CONST, TEST_FLAG_COOL, INT_MIN, INT_MAX, 0, "flags" },
546 {"lame", "set lame flag ", 0, FF_OPT_TYPE_CONST, TEST_FLAG_LAME, INT_MIN, INT_MAX, 0, "flags" },
547 {"mu", "set mu flag ", 0, FF_OPT_TYPE_CONST, TEST_FLAG_MU, INT_MIN, INT_MAX, 0, "flags" },
551 static const char *test_get_name(void *ctx)
556 static const AVClass test_class = {
566 printf("\nTesting av_set_options_string()\n");
568 TestContext test_ctx;
569 const char *options[] = {
585 "flags=+mu-lame : num=42: toggle=0",
586 "num=42 : string=blahblah",
587 "rational=0 : rational=1/2 : rational=1/-1",
591 test_ctx.class = &test_class;
592 av_opt_set_defaults2(&test_ctx, 0, 0);
593 test_ctx.string = av_strdup("default");
595 av_log_set_level(AV_LOG_DEBUG);
597 for (i=0; i < FF_ARRAY_ELEMS(options); i++) {
598 av_log(&test_ctx, AV_LOG_DEBUG, "Setting options string '%s'\n", options[i]);
599 if (av_set_options_string(&test_ctx, options[i], "=", ":") < 0)
600 av_log(&test_ctx, AV_LOG_ERROR, "Error setting options string: '%s'\n", options[i]);