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1/*
2 * AVOptions
3 * Copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at>
4 *
5 * This file is part of FFmpeg.
6 *
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.
11 *
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.
16 *
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
20 */
21
22/**
23 * @file
24 * AVOptions
25 * @author Michael Niedermayer <michaelni@gmx.at>
26 */
27
28#include "avutil.h"
29#include "avstring.h"
30#include "channel_layout.h"
31#include "common.h"
32#include "opt.h"
33#include "eval.h"
34#include "dict.h"
35#include "log.h"
36#include "parseutils.h"
37#include "pixdesc.h"
38#include "mathematics.h"
39#include "samplefmt.h"
40
41#include <float.h>
42
43#if FF_API_FIND_OPT
44//FIXME order them and do a bin search
45const AVOption *av_find_opt(void *v, const char *name, const char *unit, int mask, int flags)
46{
47 const AVOption *o = NULL;
48
49 while ((o = av_next_option(v, o))) {
50 if (!strcmp(o->name, name) && (!unit || (o->unit && !strcmp(o->unit, unit))) && (o->flags & mask) == flags)
51 return o;
52 }
53 return NULL;
54}
55#endif
56
57#if FF_API_OLD_AVOPTIONS
58const AVOption *av_next_option(void *obj, const AVOption *last)
59{
60 return av_opt_next(obj, last);
61}
62#endif
63
64const AVOption *av_opt_next(void *obj, const AVOption *last)
65{
66 AVClass *class = *(AVClass**)obj;
67 if (!last && class && class->option && class->option[0].name)
68 return class->option;
69 if (last && last[1].name)
70 return ++last;
71 return NULL;
72}
73
74static int read_number(const AVOption *o, void *dst, double *num, int *den, int64_t *intnum)
75{
76 switch (o->type) {
77 case AV_OPT_TYPE_FLAGS: *intnum = *(unsigned int*)dst;return 0;
78 case AV_OPT_TYPE_PIXEL_FMT:
79 case AV_OPT_TYPE_SAMPLE_FMT:
80 case AV_OPT_TYPE_INT: *intnum = *(int *)dst;return 0;
81 case AV_OPT_TYPE_CHANNEL_LAYOUT:
82 case AV_OPT_TYPE_DURATION:
83 case AV_OPT_TYPE_INT64: *intnum = *(int64_t *)dst;return 0;
84 case AV_OPT_TYPE_FLOAT: *num = *(float *)dst;return 0;
85 case AV_OPT_TYPE_DOUBLE: *num = *(double *)dst;return 0;
86 case AV_OPT_TYPE_RATIONAL: *intnum = ((AVRational*)dst)->num;
87 *den = ((AVRational*)dst)->den;
88 return 0;
89 case AV_OPT_TYPE_CONST: *num = o->default_val.dbl; return 0;
90 }
91 return AVERROR(EINVAL);
92}
93
94static int write_number(void *obj, const AVOption *o, void *dst, double num, int den, int64_t intnum)
95{
96 if (o->type != AV_OPT_TYPE_FLAGS &&
97 (o->max * den < num * intnum || o->min * den > num * intnum)) {
98 av_log(obj, AV_LOG_ERROR, "Value %f for parameter '%s' out of range [%g - %g]\n",
99 num*intnum/den, o->name, o->min, o->max);
100 return AVERROR(ERANGE);
101 }
102 if (o->type == AV_OPT_TYPE_FLAGS) {
103 double d = num*intnum/den;
104 if (d < -1.5 || d > 0xFFFFFFFF+0.5 || (llrint(d*256) & 255)) {
105 av_log(obj, AV_LOG_ERROR,
106 "Value %f for parameter '%s' is not a valid set of 32bit integer flags\n",
107 num*intnum/den, o->name);
108 return AVERROR(ERANGE);
109 }
110 }
111
112 switch (o->type) {
113 case AV_OPT_TYPE_FLAGS:
114 case AV_OPT_TYPE_PIXEL_FMT:
115 case AV_OPT_TYPE_SAMPLE_FMT:
116 case AV_OPT_TYPE_INT: *(int *)dst= llrint(num/den)*intnum; break;
117 case AV_OPT_TYPE_DURATION:
118 case AV_OPT_TYPE_CHANNEL_LAYOUT:
119 case AV_OPT_TYPE_INT64: *(int64_t *)dst= llrint(num/den)*intnum; break;
120 case AV_OPT_TYPE_FLOAT: *(float *)dst= num*intnum/den; break;
121 case AV_OPT_TYPE_DOUBLE:*(double *)dst= num*intnum/den; break;
122 case AV_OPT_TYPE_RATIONAL:
123 if ((int)num == num) *(AVRational*)dst= (AVRational){num*intnum, den};
124 else *(AVRational*)dst= av_d2q(num*intnum/den, 1<<24);
125 break;
126 default:
127 return AVERROR(EINVAL);
128 }
129 return 0;
130}
131
132static const double const_values[] = {
133 M_PI,
134 M_E,
135 FF_QP2LAMBDA,
136 0
137};
138
139static const char * const const_names[] = {
140 "PI",
141 "E",
142 "QP2LAMBDA",
143 0
144};
145
146static int hexchar2int(char c) {
147 if (c >= '0' && c <= '9') return c - '0';
148 if (c >= 'a' && c <= 'f') return c - 'a' + 10;
149 if (c >= 'A' && c <= 'F') return c - 'A' + 10;
150 return -1;
151}
152
153static int set_string_binary(void *obj, const AVOption *o, const char *val, uint8_t **dst)
154{
155 int *lendst = (int *)(dst + 1);
156 uint8_t *bin, *ptr;
157 int len = strlen(val);
158
159 av_freep(dst);
160 *lendst = 0;
161
162 if (len & 1)
163 return AVERROR(EINVAL);
164 len /= 2;
165
166 ptr = bin = av_malloc(len);
167 while (*val) {
168 int a = hexchar2int(*val++);
169 int b = hexchar2int(*val++);
170 if (a < 0 || b < 0) {
171 av_free(bin);
172 return AVERROR(EINVAL);
173 }
174 *ptr++ = (a << 4) | b;
175 }
176 *dst = bin;
177 *lendst = len;
178
179 return 0;
180}
181
182static int set_string(void *obj, const AVOption *o, const char *val, uint8_t **dst)
183{
184 av_freep(dst);
185 *dst = av_strdup(val);
186 return 0;
187}
188
189#define DEFAULT_NUMVAL(opt) ((opt->type == AV_OPT_TYPE_INT64 || \
190 opt->type == AV_OPT_TYPE_CONST || \
191 opt->type == AV_OPT_TYPE_FLAGS || \
192 opt->type == AV_OPT_TYPE_INT) ? \
193 opt->default_val.i64 : opt->default_val.dbl)
194
195static int set_string_number(void *obj, void *target_obj, const AVOption *o, const char *val, void *dst)
196{
197 int ret = 0, notfirst = 0;
198 for (;;) {
199 int i, den = 1;
200 char buf[256];
201 int cmd = 0;
202 double d, num = 1;
203 int64_t intnum = 1;
204
205 i = 0;
206 if (*val == '+' || *val == '-') {
207 if (o->type == AV_OPT_TYPE_FLAGS)
208 cmd = *(val++);
209 else if (!notfirst)
210 buf[i++] = *val;
211 }
212
213 for (; i < sizeof(buf) - 1 && val[i] && val[i] != '+' && val[i] != '-'; i++)
214 buf[i] = val[i];
215 buf[i] = 0;
216
217 {
218 const AVOption *o_named = av_opt_find(target_obj, buf, o->unit, 0, 0);
219 if (o_named && o_named->type == AV_OPT_TYPE_CONST)
220 d = DEFAULT_NUMVAL(o_named);
221 else if (!strcmp(buf, "default")) d = DEFAULT_NUMVAL(o);
222 else if (!strcmp(buf, "max" )) d = o->max;
223 else if (!strcmp(buf, "min" )) d = o->min;
224 else if (!strcmp(buf, "none" )) d = 0;
225 else if (!strcmp(buf, "all" )) d = ~0;
226 else {
227 int res = av_expr_parse_and_eval(&d, buf, const_names, const_values, NULL, NULL, NULL, NULL, NULL, 0, obj);
228 if (res < 0) {
229 av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\"\n", val);
230 return res;
231 }
232 }
233 }
234 if (o->type == AV_OPT_TYPE_FLAGS) {
235 read_number(o, dst, NULL, NULL, &intnum);
236 if (cmd == '+') d = intnum | (int64_t)d;
237 else if (cmd == '-') d = intnum &~(int64_t)d;
238 } else {
239 read_number(o, dst, &num, &den, &intnum);
240 if (cmd == '+') d = notfirst*num*intnum/den + d;
241 else if (cmd == '-') d = notfirst*num*intnum/den - d;
242 }
243
244 if ((ret = write_number(obj, o, dst, d, 1, 1)) < 0)
245 return ret;
246 val += i;
247 if (!*val)
248 return 0;
249 notfirst = 1;
250 }
251
252 return 0;
253}
254
255#if FF_API_OLD_AVOPTIONS
256int av_set_string3(void *obj, const char *name, const char *val, int alloc, const AVOption **o_out)
257{
258 const AVOption *o = av_opt_find(obj, name, NULL, 0, 0);
259 if (o_out)
260 *o_out = o;
261 return av_opt_set(obj, name, val, 0);
262}
263#endif
264
265int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
266{
267 int ret = 0;
268 void *dst, *target_obj;
269 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
270 if (!o || !target_obj)
271 return AVERROR_OPTION_NOT_FOUND;
272 if (!val && (o->type != AV_OPT_TYPE_STRING &&
273 o->type != AV_OPT_TYPE_PIXEL_FMT && o->type != AV_OPT_TYPE_SAMPLE_FMT &&
274 o->type != AV_OPT_TYPE_IMAGE_SIZE && o->type != AV_OPT_TYPE_VIDEO_RATE &&
275 o->type != AV_OPT_TYPE_DURATION && o->type != AV_OPT_TYPE_COLOR &&
276 o->type != AV_OPT_TYPE_CHANNEL_LAYOUT))
277 return AVERROR(EINVAL);
278
279 dst = ((uint8_t*)target_obj) + o->offset;
280 switch (o->type) {
281 case AV_OPT_TYPE_STRING: return set_string(obj, o, val, dst);
282 case AV_OPT_TYPE_BINARY: return set_string_binary(obj, o, val, dst);
283 case AV_OPT_TYPE_FLAGS:
284 case AV_OPT_TYPE_INT:
285 case AV_OPT_TYPE_INT64:
286 case AV_OPT_TYPE_FLOAT:
287 case AV_OPT_TYPE_DOUBLE:
288 case AV_OPT_TYPE_RATIONAL: return set_string_number(obj, target_obj, o, val, dst);
289 case AV_OPT_TYPE_IMAGE_SIZE:
290 if (!val || !strcmp(val, "none")) {
291 *(int *)dst = *((int *)dst + 1) = 0;
292 return 0;
293 }
294 ret = av_parse_video_size(dst, ((int *)dst) + 1, val);
295 if (ret < 0)
296 av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as image size\n", val);
297 return ret;
298 case AV_OPT_TYPE_VIDEO_RATE:
299 if (!val) {
300 ret = AVERROR(EINVAL);
301 } else {
302 ret = av_parse_video_rate(dst, val);
303 }
304 if (ret < 0)
305 av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as video rate\n", val);
306 return ret;
307 case AV_OPT_TYPE_PIXEL_FMT:
308 if (!val || !strcmp(val, "none")) {
309 ret = AV_PIX_FMT_NONE;
310 } else {
311 ret = av_get_pix_fmt(val);
312 if (ret == AV_PIX_FMT_NONE) {
313 char *tail;
314 ret = strtol(val, &tail, 0);
315 if (*tail || (unsigned)ret >= AV_PIX_FMT_NB) {
316 av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as pixel format\n", val);
317 return AVERROR(EINVAL);
318 }
319 }
320 }
321 *(enum AVPixelFormat *)dst = ret;
322 return 0;
323 case AV_OPT_TYPE_SAMPLE_FMT:
324 if (!val || !strcmp(val, "none")) {
325 ret = AV_SAMPLE_FMT_NONE;
326 } else {
327 ret = av_get_sample_fmt(val);
328 if (ret == AV_SAMPLE_FMT_NONE) {
329 char *tail;
330 ret = strtol(val, &tail, 0);
331 if (*tail || (unsigned)ret >= AV_SAMPLE_FMT_NB) {
332 av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as sample format\n", val);
333 return AVERROR(EINVAL);
334 }
335 }
336 }
337 *(enum AVSampleFormat *)dst = ret;
338 return 0;
339 case AV_OPT_TYPE_DURATION:
340 if (!val) {
341 *(int64_t *)dst = 0;
342 return 0;
343 } else {
344 if ((ret = av_parse_time(dst, val, 1)) < 0)
345 av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as duration\n", val);
346 return ret;
347 }
348 break;
349 case AV_OPT_TYPE_COLOR:
350 if (!val) {
351 return 0;
352 } else {
353 ret = av_parse_color(dst, val, -1, obj);
354 if (ret < 0)
355 av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as color\n", val);
356 return ret;
357 }
358 break;
359 case AV_OPT_TYPE_CHANNEL_LAYOUT:
360 if (!val || !strcmp(val, "none")) {
361 *(int64_t *)dst = 0;
362 } else {
363#if FF_API_GET_CHANNEL_LAYOUT_COMPAT
364 int64_t cl = ff_get_channel_layout(val, 0);
365#else
366 int64_t cl = av_get_channel_layout(val);
367#endif
368 if (!cl) {
369 av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as channel layout\n", val);
370 ret = AVERROR(EINVAL);
371 }
372 *(int64_t *)dst = cl;
373 return ret;
374 }
375 break;
376 }
377
378 av_log(obj, AV_LOG_ERROR, "Invalid option type.\n");
379 return AVERROR(EINVAL);
380}
381
382#define OPT_EVAL_NUMBER(name, opttype, vartype)\
383 int av_opt_eval_ ## name(void *obj, const AVOption *o, const char *val, vartype *name ## _out)\
384 {\
385 if (!o || o->type != opttype)\
386 return AVERROR(EINVAL);\
387 return set_string_number(obj, obj, o, val, name ## _out);\
388 }
389
390OPT_EVAL_NUMBER(flags, AV_OPT_TYPE_FLAGS, int)
391OPT_EVAL_NUMBER(int, AV_OPT_TYPE_INT, int)
392OPT_EVAL_NUMBER(int64, AV_OPT_TYPE_INT64, int64_t)
393OPT_EVAL_NUMBER(float, AV_OPT_TYPE_FLOAT, float)
394OPT_EVAL_NUMBER(double, AV_OPT_TYPE_DOUBLE, double)
395OPT_EVAL_NUMBER(q, AV_OPT_TYPE_RATIONAL, AVRational)
396
397static int set_number(void *obj, const char *name, double num, int den, int64_t intnum,
398 int search_flags)
399{
400 void *dst, *target_obj;
401 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
402
403 if (!o || !target_obj)
404 return AVERROR_OPTION_NOT_FOUND;
405
406 dst = ((uint8_t*)target_obj) + o->offset;
407 return write_number(obj, o, dst, num, den, intnum);
408}
409
410#if FF_API_OLD_AVOPTIONS
411const AVOption *av_set_double(void *obj, const char *name, double n)
412{
413 const AVOption *o = av_opt_find(obj, name, NULL, 0, 0);
414 if (set_number(obj, name, n, 1, 1, 0) < 0)
415 return NULL;
416 return o;
417}
418
419const AVOption *av_set_q(void *obj, const char *name, AVRational n)
420{
421 const AVOption *o = av_opt_find(obj, name, NULL, 0, 0);
422 if (set_number(obj, name, n.num, n.den, 1, 0) < 0)
423 return NULL;
424 return o;
425}
426
427const AVOption *av_set_int(void *obj, const char *name, int64_t n)
428{
429 const AVOption *o = av_opt_find(obj, name, NULL, 0, 0);
430 if (set_number(obj, name, 1, 1, n, 0) < 0)
431 return NULL;
432 return o;
433}
434#endif
435
436int av_opt_set_int(void *obj, const char *name, int64_t val, int search_flags)
437{
438 return set_number(obj, name, 1, 1, val, search_flags);
439}
440
441int av_opt_set_double(void *obj, const char *name, double val, int search_flags)
442{
443 return set_number(obj, name, val, 1, 1, search_flags);
444}
445
446int av_opt_set_q(void *obj, const char *name, AVRational val, int search_flags)
447{
448 return set_number(obj, name, val.num, val.den, 1, search_flags);
449}
450
451int av_opt_set_bin(void *obj, const char *name, const uint8_t *val, int len, int search_flags)
452{
453 void *target_obj;
454 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
455 uint8_t *ptr;
456 uint8_t **dst;
457 int *lendst;
458
459 if (!o || !target_obj)
460 return AVERROR_OPTION_NOT_FOUND;
461
462 if (o->type != AV_OPT_TYPE_BINARY)
463 return AVERROR(EINVAL);
464
465 ptr = len ? av_malloc(len) : NULL;
466 if (len && !ptr)
467 return AVERROR(ENOMEM);
468
469 dst = (uint8_t **)(((uint8_t *)target_obj) + o->offset);
470 lendst = (int *)(dst + 1);
471
472 av_free(*dst);
473 *dst = ptr;
474 *lendst = len;
475 if (len)
476 memcpy(ptr, val, len);
477
478 return 0;
479}
480
481int av_opt_set_image_size(void *obj, const char *name, int w, int h, int search_flags)
482{
483 void *target_obj;
484 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
485
486 if (!o || !target_obj)
487 return AVERROR_OPTION_NOT_FOUND;
488 if (o->type != AV_OPT_TYPE_IMAGE_SIZE) {
489 av_log(obj, AV_LOG_ERROR,
490 "The value set by option '%s' is not an image size.\n", o->name);
491 return AVERROR(EINVAL);
492 }
493 if (w<0 || h<0) {
494 av_log(obj, AV_LOG_ERROR,
495 "Invalid negative size value %dx%d for size '%s'\n", w, h, o->name);
496 return AVERROR(EINVAL);
497 }
498 *(int *)(((uint8_t *)target_obj) + o->offset) = w;
499 *(int *)(((uint8_t *)target_obj+sizeof(int)) + o->offset) = h;
500 return 0;
501}
502
503int av_opt_set_video_rate(void *obj, const char *name, AVRational val, int search_flags)
504{
505 void *target_obj;
506 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
507
508 if (!o || !target_obj)
509 return AVERROR_OPTION_NOT_FOUND;
510 if (o->type != AV_OPT_TYPE_VIDEO_RATE) {
511 av_log(obj, AV_LOG_ERROR,
512 "The value set by option '%s' is not a video rate.\n", o->name);
513 return AVERROR(EINVAL);
514 }
515 if (val.num <= 0 || val.den <= 0)
516 return AVERROR(EINVAL);
517 return set_number(obj, name, val.num, val.den, 1, search_flags);
518}
519
520static int set_format(void *obj, const char *name, int fmt, int search_flags,
521 enum AVOptionType type, const char *desc, int nb_fmts)
522{
523 void *target_obj;
524 const AVOption *o = av_opt_find2(obj, name, NULL, 0,
525 search_flags, &target_obj);
526 int min, max;
527 const AVClass *class = *(AVClass **)obj;
528
529 if (!o || !target_obj)
530 return AVERROR_OPTION_NOT_FOUND;
531 if (o->type != type) {
532 av_log(obj, AV_LOG_ERROR,
533 "The value set by option '%s' is not a %s format", name, desc);
534 return AVERROR(EINVAL);
535 }
536
537#if LIBAVUTIL_VERSION_MAJOR < 53
538 if (class->version && class->version < AV_VERSION_INT(52, 11, 100)) {
539 min = -1;
540 max = nb_fmts-1;
541 } else
542#endif
543 {
544 min = FFMIN(o->min, -1);
545 max = FFMAX(o->max, nb_fmts-1);
546 }
547 if (fmt < min || fmt > max) {
548 av_log(obj, AV_LOG_ERROR,
549 "Value %d for parameter '%s' out of %s format range [%d - %d]\n",
550 fmt, name, desc, min, max);
551 return AVERROR(ERANGE);
552 }
553 *(int *)(((uint8_t *)target_obj) + o->offset) = fmt;
554 return 0;
555}
556
557int av_opt_set_pixel_fmt(void *obj, const char *name, enum AVPixelFormat fmt, int search_flags)
558{
559 return set_format(obj, name, fmt, search_flags, AV_OPT_TYPE_PIXEL_FMT, "pixel", AV_PIX_FMT_NB);
560}
561
562int av_opt_set_sample_fmt(void *obj, const char *name, enum AVSampleFormat fmt, int search_flags)
563{
564 return set_format(obj, name, fmt, search_flags, AV_OPT_TYPE_SAMPLE_FMT, "sample", AV_SAMPLE_FMT_NB);
565}
566
567int av_opt_set_channel_layout(void *obj, const char *name, int64_t cl, int search_flags)
568{
569 void *target_obj;
570 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
571
572 if (!o || !target_obj)
573 return AVERROR_OPTION_NOT_FOUND;
574 if (o->type != AV_OPT_TYPE_CHANNEL_LAYOUT) {
575 av_log(obj, AV_LOG_ERROR,
576 "The value set by option '%s' is not a channel layout.\n", o->name);
577 return AVERROR(EINVAL);
578 }
579 *(int *)(((int64_t *)target_obj) + o->offset) = cl;
580 return 0;
581}
582
583#if FF_API_OLD_AVOPTIONS
584/**
585 *
586 * @param buf a buffer which is used for returning non string values as strings, can be NULL
587 * @param buf_len allocated length in bytes of buf
588 */
589const char *av_get_string(void *obj, const char *name, const AVOption **o_out, char *buf, int buf_len)
590{
591 const AVOption *o = av_opt_find(obj, name, NULL, 0, AV_OPT_SEARCH_CHILDREN);
592 void *dst;
593 uint8_t *bin;
594 int len, i;
595 if (!o)
596 return NULL;
597 if (o->type != AV_OPT_TYPE_STRING && (!buf || !buf_len))
598 return NULL;
599
600 dst= ((uint8_t*)obj) + o->offset;
601 if (o_out) *o_out= o;
602
603 switch (o->type) {
604 case AV_OPT_TYPE_FLAGS: snprintf(buf, buf_len, "0x%08X",*(int *)dst);break;
605 case AV_OPT_TYPE_INT: snprintf(buf, buf_len, "%d" , *(int *)dst);break;
606 case AV_OPT_TYPE_INT64: snprintf(buf, buf_len, "%"PRId64, *(int64_t*)dst);break;
607 case AV_OPT_TYPE_FLOAT: snprintf(buf, buf_len, "%f" , *(float *)dst);break;
608 case AV_OPT_TYPE_DOUBLE: snprintf(buf, buf_len, "%f" , *(double *)dst);break;
609 case AV_OPT_TYPE_RATIONAL: snprintf(buf, buf_len, "%d/%d", ((AVRational*)dst)->num, ((AVRational*)dst)->den);break;
610 case AV_OPT_TYPE_CONST: snprintf(buf, buf_len, "%f" , o->default_val.dbl);break;
611 case AV_OPT_TYPE_STRING: return *(void**)dst;
612 case AV_OPT_TYPE_BINARY:
613 len = *(int*)(((uint8_t *)dst) + sizeof(uint8_t *));
614 if (len >= (buf_len + 1)/2) return NULL;
615 bin = *(uint8_t**)dst;
616 for (i = 0; i < len; i++) snprintf(buf + i*2, 3, "%02X", bin[i]);
617 break;
618 default: return NULL;
619 }
620 return buf;
621}
622#endif
623
624int av_opt_get(void *obj, const char *name, int search_flags, uint8_t **out_val)
625{
626 void *dst, *target_obj;
627 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
628 uint8_t *bin, buf[128];
629 int len, i, ret;
630 int64_t i64;
631
632 if (!o || !target_obj || (o->offset<=0 && o->type != AV_OPT_TYPE_CONST))
633 return AVERROR_OPTION_NOT_FOUND;
634
635 dst = (uint8_t*)target_obj + o->offset;
636
637 buf[0] = 0;
638 switch (o->type) {
639 case AV_OPT_TYPE_FLAGS: ret = snprintf(buf, sizeof(buf), "0x%08X", *(int *)dst);break;
640 case AV_OPT_TYPE_INT: ret = snprintf(buf, sizeof(buf), "%d" , *(int *)dst);break;
641 case AV_OPT_TYPE_INT64: ret = snprintf(buf, sizeof(buf), "%"PRId64, *(int64_t*)dst);break;
642 case AV_OPT_TYPE_FLOAT: ret = snprintf(buf, sizeof(buf), "%f" , *(float *)dst);break;
643 case AV_OPT_TYPE_DOUBLE: ret = snprintf(buf, sizeof(buf), "%f" , *(double *)dst);break;
644 case AV_OPT_TYPE_VIDEO_RATE:
645 case AV_OPT_TYPE_RATIONAL: ret = snprintf(buf, sizeof(buf), "%d/%d", ((AVRational*)dst)->num, ((AVRational*)dst)->den);break;
646 case AV_OPT_TYPE_CONST: ret = snprintf(buf, sizeof(buf), "%f" , o->default_val.dbl);break;
647 case AV_OPT_TYPE_STRING:
648 if (*(uint8_t**)dst)
649 *out_val = av_strdup(*(uint8_t**)dst);
650 else
651 *out_val = av_strdup("");
652 return 0;
653 case AV_OPT_TYPE_BINARY:
654 len = *(int*)(((uint8_t *)dst) + sizeof(uint8_t *));
655 if ((uint64_t)len*2 + 1 > INT_MAX)
656 return AVERROR(EINVAL);
657 if (!(*out_val = av_malloc(len*2 + 1)))
658 return AVERROR(ENOMEM);
659 bin = *(uint8_t**)dst;
660 for (i = 0; i < len; i++)
661 snprintf(*out_val + i*2, 3, "%02X", bin[i]);
662 return 0;
663 case AV_OPT_TYPE_IMAGE_SIZE:
664 ret = snprintf(buf, sizeof(buf), "%dx%d", ((int *)dst)[0], ((int *)dst)[1]);
665 break;
666 case AV_OPT_TYPE_PIXEL_FMT:
667 ret = snprintf(buf, sizeof(buf), "%s", (char *)av_x_if_null(av_get_pix_fmt_name(*(enum AVPixelFormat *)dst), "none"));
668 break;
669 case AV_OPT_TYPE_SAMPLE_FMT:
670 ret = snprintf(buf, sizeof(buf), "%s", (char *)av_x_if_null(av_get_sample_fmt_name(*(enum AVSampleFormat *)dst), "none"));
671 break;
672 case AV_OPT_TYPE_DURATION:
673 i64 = *(int64_t *)dst;
674 ret = snprintf(buf, sizeof(buf), "%"PRIi64"d:%02d:%02d.%06d",
675 i64 / 3600000000, (int)((i64 / 60000000) % 60),
676 (int)((i64 / 1000000) % 60), (int)(i64 % 1000000));
677 break;
678 case AV_OPT_TYPE_COLOR:
679 ret = snprintf(buf, sizeof(buf), "0x%02x%02x%02x%02x", ((int *)dst)[0], ((int *)dst)[1], ((int *)dst)[2], ((int *)dst)[3]);
680 break;
681 case AV_OPT_TYPE_CHANNEL_LAYOUT:
682 i64 = *(int64_t *)dst;
683 ret = snprintf(buf, sizeof(buf), "0x%"PRIx64, i64);
684 break;
685 default:
686 return AVERROR(EINVAL);
687 }
688
689 if (ret >= sizeof(buf))
690 return AVERROR(EINVAL);
691 *out_val = av_strdup(buf);
692 return 0;
693}
694
695static int get_number(void *obj, const char *name, const AVOption **o_out, double *num, int *den, int64_t *intnum,
696 int search_flags)
697{
698 void *dst, *target_obj;
699 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
700 if (!o || !target_obj)
701 goto error;
702
703 dst = ((uint8_t*)target_obj) + o->offset;
704
705 if (o_out) *o_out= o;
706
707 return read_number(o, dst, num, den, intnum);
708
709error:
710 *den=*intnum=0;
711 return -1;
712}
713
714#if FF_API_OLD_AVOPTIONS
715double av_get_double(void *obj, const char *name, const AVOption **o_out)
716{
717 int64_t intnum=1;
718 double num=1;
719 int den=1;
720
721 if (get_number(obj, name, o_out, &num, &den, &intnum, 0) < 0)
722 return NAN;
723 return num*intnum/den;
724}
725
726AVRational av_get_q(void *obj, const char *name, const AVOption **o_out)
727{
728 int64_t intnum=1;
729 double num=1;
730 int den=1;
731
732 if (get_number(obj, name, o_out, &num, &den, &intnum, 0) < 0)
733 return (AVRational){0, 0};
734 if (num == 1.0 && (int)intnum == intnum)
735 return (AVRational){intnum, den};
736 else
737 return av_d2q(num*intnum/den, 1<<24);
738}
739
740int64_t av_get_int(void *obj, const char *name, const AVOption **o_out)
741{
742 int64_t intnum=1;
743 double num=1;
744 int den=1;
745
746 if (get_number(obj, name, o_out, &num, &den, &intnum, 0) < 0)
747 return -1;
748 return num*intnum/den;
749}
750#endif
751
752int av_opt_get_int(void *obj, const char *name, int search_flags, int64_t *out_val)
753{
754 int64_t intnum = 1;
755 double num = 1;
756 int ret, den = 1;
757
758 if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0)
759 return ret;
760 *out_val = num*intnum/den;
761 return 0;
762}
763
764int av_opt_get_double(void *obj, const char *name, int search_flags, double *out_val)
765{
766 int64_t intnum = 1;
767 double num = 1;
768 int ret, den = 1;
769
770 if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0)
771 return ret;
772 *out_val = num*intnum/den;
773 return 0;
774}
775
776int av_opt_get_q(void *obj, const char *name, int search_flags, AVRational *out_val)
777{
778 int64_t intnum = 1;
779 double num = 1;
780 int ret, den = 1;
781
782 if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0)
783 return ret;
784
785 if (num == 1.0 && (int)intnum == intnum)
786 *out_val = (AVRational){intnum, den};
787 else
788 *out_val = av_d2q(num*intnum/den, 1<<24);
789 return 0;
790}
791
792int av_opt_get_image_size(void *obj, const char *name, int search_flags, int *w_out, int *h_out)
793{
794 void *dst, *target_obj;
795 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
796 if (!o || !target_obj)
797 return AVERROR_OPTION_NOT_FOUND;
798 if (o->type != AV_OPT_TYPE_IMAGE_SIZE) {
799 av_log(obj, AV_LOG_ERROR,
800 "The value for option '%s' is not an image size.\n", name);
801 return AVERROR(EINVAL);
802 }
803
804 dst = ((uint8_t*)target_obj) + o->offset;
805 if (w_out) *w_out = *(int *)dst;
806 if (h_out) *h_out = *((int *)dst+1);
807 return 0;
808}
809
810int av_opt_get_video_rate(void *obj, const char *name, int search_flags, AVRational *out_val)
811{
812 int64_t intnum = 1;
813 double num = 1;
814 int ret, den = 1;
815
816 if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0)
817 return ret;
818
819 if (num == 1.0 && (int)intnum == intnum)
820 *out_val = (AVRational){intnum, den};
821 else
822 *out_val = av_d2q(num*intnum/den, 1<<24);
823 return 0;
824}
825
826static int get_format(void *obj, const char *name, int search_flags, int *out_fmt,
827 enum AVOptionType type, const char *desc)
828{
829 void *dst, *target_obj;
830 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
831 if (!o || !target_obj)
832 return AVERROR_OPTION_NOT_FOUND;
833 if (o->type != type) {
834 av_log(obj, AV_LOG_ERROR,
835 "The value for option '%s' is not a %s format.\n", desc, name);
836 return AVERROR(EINVAL);
837 }
838
839 dst = ((uint8_t*)target_obj) + o->offset;
840 *out_fmt = *(int *)dst;
841 return 0;
842}
843
844int av_opt_get_pixel_fmt(void *obj, const char *name, int search_flags, enum AVPixelFormat *out_fmt)
845{
846 return get_format(obj, name, search_flags, out_fmt, AV_OPT_TYPE_PIXEL_FMT, "pixel");
847}
848
849int av_opt_get_sample_fmt(void *obj, const char *name, int search_flags, enum AVSampleFormat *out_fmt)
850{
851 return get_format(obj, name, search_flags, out_fmt, AV_OPT_TYPE_SAMPLE_FMT, "sample");
852}
853
854int av_opt_get_channel_layout(void *obj, const char *name, int search_flags, int64_t *cl)
855{
856 void *dst, *target_obj;
857 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
858 if (!o || !target_obj)
859 return AVERROR_OPTION_NOT_FOUND;
860 if (o->type != AV_OPT_TYPE_CHANNEL_LAYOUT) {
861 av_log(obj, AV_LOG_ERROR,
862 "The value for option '%s' is not a channel layout.\n", name);
863 return AVERROR(EINVAL);
864 }
865
866 dst = ((uint8_t*)target_obj) + o->offset;
867 *cl = *(int64_t *)dst;
868 return 0;
869}
870
871int av_opt_flag_is_set(void *obj, const char *field_name, const char *flag_name)
872{
873 const AVOption *field = av_opt_find(obj, field_name, NULL, 0, 0);
874 const AVOption *flag = av_opt_find(obj, flag_name,
875 field ? field->unit : NULL, 0, 0);
876 int64_t res;
877
878 if (!field || !flag || flag->type != AV_OPT_TYPE_CONST ||
879 av_opt_get_int(obj, field_name, 0, &res) < 0)
880 return 0;
881 return res & flag->default_val.i64;
882}
883
884static void log_value(void *av_log_obj, int level, double d)
885{
886 if (d == INT_MAX) {
887 av_log(av_log_obj, level, "INT_MAX");
888 } else if (d == INT_MIN) {
889 av_log(av_log_obj, level, "INT_MIN");
890 } else if (d == (double)INT64_MAX) {
891 av_log(av_log_obj, level, "I64_MAX");
892 } else if (d == INT64_MIN) {
893 av_log(av_log_obj, level, "I64_MIN");
894 } else if (d == FLT_MAX) {
895 av_log(av_log_obj, level, "FLT_MAX");
896 } else if (d == FLT_MIN) {
897 av_log(av_log_obj, level, "FLT_MIN");
898 } else {
899 av_log(av_log_obj, level, "%g", d);
900 }
901}
902
903static void opt_list(void *obj, void *av_log_obj, const char *unit,
904 int req_flags, int rej_flags)
905{
906 const AVOption *opt=NULL;
907 AVOptionRanges *r;
908 int i;
909
910 while ((opt = av_opt_next(obj, opt))) {
911 if (!(opt->flags & req_flags) || (opt->flags & rej_flags))
912 continue;
913
914 /* Don't print CONST's on level one.
915 * Don't print anything but CONST's on level two.
916 * Only print items from the requested unit.
917 */
918 if (!unit && opt->type==AV_OPT_TYPE_CONST)
919 continue;
920 else if (unit && opt->type!=AV_OPT_TYPE_CONST)
921 continue;
922 else if (unit && opt->type==AV_OPT_TYPE_CONST && strcmp(unit, opt->unit))
923 continue;
924 else if (unit && opt->type == AV_OPT_TYPE_CONST)
925 av_log(av_log_obj, AV_LOG_INFO, " %-15s ", opt->name);
926 else
927 av_log(av_log_obj, AV_LOG_INFO, " %s%-17s ",
928 (opt->flags & AV_OPT_FLAG_FILTERING_PARAM) ? "" : "-",
929 opt->name);
930
931 switch (opt->type) {
932 case AV_OPT_TYPE_FLAGS:
933 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<flags>");
934 break;
935 case AV_OPT_TYPE_INT:
936 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<int>");
937 break;
938 case AV_OPT_TYPE_INT64:
939 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<int64>");
940 break;
941 case AV_OPT_TYPE_DOUBLE:
942 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<double>");
943 break;
944 case AV_OPT_TYPE_FLOAT:
945 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<float>");
946 break;
947 case AV_OPT_TYPE_STRING:
948 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<string>");
949 break;
950 case AV_OPT_TYPE_RATIONAL:
951 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<rational>");
952 break;
953 case AV_OPT_TYPE_BINARY:
954 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<binary>");
955 break;
956 case AV_OPT_TYPE_IMAGE_SIZE:
957 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<image_size>");
958 break;
959 case AV_OPT_TYPE_VIDEO_RATE:
960 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<video_rate>");
961 break;
962 case AV_OPT_TYPE_PIXEL_FMT:
963 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<pix_fmt>");
964 break;
965 case AV_OPT_TYPE_SAMPLE_FMT:
966 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<sample_fmt>");
967 break;
968 case AV_OPT_TYPE_DURATION:
969 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<duration>");
970 break;
971 case AV_OPT_TYPE_COLOR:
972 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<color>");
973 break;
974 case AV_OPT_TYPE_CHANNEL_LAYOUT:
975 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<channel_layout>");
976 break;
977 case AV_OPT_TYPE_CONST:
978 default:
979 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "");
980 break;
981 }
982 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_ENCODING_PARAM) ? 'E' : '.');
983 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_DECODING_PARAM) ? 'D' : '.');
984 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_FILTERING_PARAM)? 'F' : '.');
985 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_VIDEO_PARAM ) ? 'V' : '.');
986 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_AUDIO_PARAM ) ? 'A' : '.');
987 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_SUBTITLE_PARAM) ? 'S' : '.');
988
989 if (opt->help)
990 av_log(av_log_obj, AV_LOG_INFO, " %s", opt->help);
991
992 if (av_opt_query_ranges(&r, obj, opt->name, AV_OPT_SEARCH_FAKE_OBJ) >= 0) {
993 switch (opt->type) {
994 case AV_OPT_TYPE_INT:
995 case AV_OPT_TYPE_INT64:
996 case AV_OPT_TYPE_DOUBLE:
997 case AV_OPT_TYPE_FLOAT:
998 case AV_OPT_TYPE_RATIONAL:
999 for (i = 0; i < r->nb_ranges; i++) {
1000 av_log(av_log_obj, AV_LOG_INFO, " (from ");
1001 log_value(av_log_obj, AV_LOG_INFO, r->range[i]->value_min);
1002 av_log(av_log_obj, AV_LOG_INFO, " to ");
1003 log_value(av_log_obj, AV_LOG_INFO, r->range[i]->value_max);
1004 av_log(av_log_obj, AV_LOG_INFO, ")");
1005 }
1006 break;
1007 }
1008 av_opt_freep_ranges(&r);
1009 }
1010
1011 if (opt->type != AV_OPT_TYPE_CONST &&
1012 opt->type != AV_OPT_TYPE_BINARY &&
1013 !((opt->type == AV_OPT_TYPE_COLOR ||
1014 opt->type == AV_OPT_TYPE_IMAGE_SIZE ||
1015 opt->type == AV_OPT_TYPE_STRING ||
1016 opt->type == AV_OPT_TYPE_VIDEO_RATE) &&
1017 !opt->default_val.str)) {
1018 av_log(av_log_obj, AV_LOG_INFO, " (default ");
1019 switch (opt->type) {
1020 case AV_OPT_TYPE_FLAGS:
1021 av_log(av_log_obj, AV_LOG_INFO, "%"PRIX64, opt->default_val.i64);
1022 break;
1023 case AV_OPT_TYPE_DURATION:
1024 case AV_OPT_TYPE_INT:
1025 case AV_OPT_TYPE_INT64:
1026 log_value(av_log_obj, AV_LOG_INFO, opt->default_val.i64);
1027 break;
1028 case AV_OPT_TYPE_DOUBLE:
1029 case AV_OPT_TYPE_FLOAT:
1030 log_value(av_log_obj, AV_LOG_INFO, opt->default_val.dbl);
1031 break;
1032 case AV_OPT_TYPE_RATIONAL: {
1033 AVRational q = av_d2q(opt->default_val.dbl, INT_MAX);
1034 av_log(av_log_obj, AV_LOG_INFO, "%d/%d", q.num, q.den); }
1035 break;
1036 case AV_OPT_TYPE_PIXEL_FMT:
1037 av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(av_get_pix_fmt_name(opt->default_val.i64), "none"));
1038 break;
1039 case AV_OPT_TYPE_SAMPLE_FMT:
1040 av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(av_get_sample_fmt_name(opt->default_val.i64), "none"));
1041 break;
1042 case AV_OPT_TYPE_COLOR:
1043 case AV_OPT_TYPE_IMAGE_SIZE:
1044 case AV_OPT_TYPE_STRING:
1045 case AV_OPT_TYPE_VIDEO_RATE:
1046 av_log(av_log_obj, AV_LOG_INFO, "\"%s\"", opt->default_val.str);
1047 break;
1048 case AV_OPT_TYPE_CHANNEL_LAYOUT:
1049 av_log(av_log_obj, AV_LOG_INFO, "0x%"PRIx64, opt->default_val.i64);
1050 break;
1051 }
1052 av_log(av_log_obj, AV_LOG_INFO, ")");
1053 }
1054
1055 av_log(av_log_obj, AV_LOG_INFO, "\n");
1056 if (opt->unit && opt->type != AV_OPT_TYPE_CONST) {
1057 opt_list(obj, av_log_obj, opt->unit, req_flags, rej_flags);
1058 }
1059 }
1060}
1061
1062int av_opt_show2(void *obj, void *av_log_obj, int req_flags, int rej_flags)
1063{
1064 if (!obj)
1065 return -1;
1066
1067 av_log(av_log_obj, AV_LOG_INFO, "%s AVOptions:\n", (*(AVClass**)obj)->class_name);
1068
1069 opt_list(obj, av_log_obj, NULL, req_flags, rej_flags);
1070
1071 return 0;
1072}
1073
1074void av_opt_set_defaults(void *s)
1075{
1076#if FF_API_OLD_AVOPTIONS
1077 av_opt_set_defaults2(s, 0, 0);
1078}
1079
1080void av_opt_set_defaults2(void *s, int mask, int flags)
1081{
1082#endif
1083 const AVClass *class = *(AVClass **)s;
1084 const AVOption *opt = NULL;
1085 while ((opt = av_opt_next(s, opt)) != NULL) {
1086#if FF_API_OLD_AVOPTIONS
1087 if ((opt->flags & mask) != flags)
1088 continue;
1089#endif
1090 switch (opt->type) {
1091 case AV_OPT_TYPE_CONST:
1092 /* Nothing to be done here */
1093 break;
1094 case AV_OPT_TYPE_FLAGS:
1095 case AV_OPT_TYPE_INT:
1096 case AV_OPT_TYPE_INT64:
1097 case AV_OPT_TYPE_DURATION:
1098 case AV_OPT_TYPE_CHANNEL_LAYOUT:
1099 av_opt_set_int(s, opt->name, opt->default_val.i64, 0);
1100 break;
1101 case AV_OPT_TYPE_DOUBLE:
1102 case AV_OPT_TYPE_FLOAT: {
1103 double val;
1104 val = opt->default_val.dbl;
1105 av_opt_set_double(s, opt->name, val, 0);
1106 }
1107 break;
1108 case AV_OPT_TYPE_RATIONAL: {
1109 AVRational val;
1110 val = av_d2q(opt->default_val.dbl, INT_MAX);
1111 av_opt_set_q(s, opt->name, val, 0);
1112 }
1113 break;
1114 case AV_OPT_TYPE_COLOR:
1115 case AV_OPT_TYPE_STRING:
1116 case AV_OPT_TYPE_IMAGE_SIZE:
1117 case AV_OPT_TYPE_VIDEO_RATE:
1118 av_opt_set(s, opt->name, opt->default_val.str, 0);
1119 break;
1120 case AV_OPT_TYPE_PIXEL_FMT:
1121#if LIBAVUTIL_VERSION_MAJOR < 53
1122 if (class->version && class->version < AV_VERSION_INT(52, 10, 100))
1123 av_opt_set(s, opt->name, opt->default_val.str, 0);
1124 else
1125#endif
1126 av_opt_set_pixel_fmt(s, opt->name, opt->default_val.i64, 0);
1127 break;
1128 case AV_OPT_TYPE_SAMPLE_FMT:
1129#if LIBAVUTIL_VERSION_MAJOR < 53
1130 if (class->version && class->version < AV_VERSION_INT(52, 10, 100))
1131 av_opt_set(s, opt->name, opt->default_val.str, 0);
1132 else
1133#endif
1134 av_opt_set_sample_fmt(s, opt->name, opt->default_val.i64, 0);
1135 break;
1136 case AV_OPT_TYPE_BINARY:
1137 /* Cannot set default for binary */
1138 break;
1139 default:
1140 av_log(s, AV_LOG_DEBUG, "AVOption type %d of option %s not implemented yet\n", opt->type, opt->name);
1141 }
1142 }
1143}
1144
1145/**
1146 * Store the value in the field in ctx that is named like key.
1147 * ctx must be an AVClass context, storing is done using AVOptions.
1148 *
1149 * @param buf the string to parse, buf will be updated to point at the
1150 * separator just after the parsed key/value pair
1151 * @param key_val_sep a 0-terminated list of characters used to
1152 * separate key from value
1153 * @param pairs_sep a 0-terminated list of characters used to separate
1154 * two pairs from each other
1155 * @return 0 if the key/value pair has been successfully parsed and
1156 * set, or a negative value corresponding to an AVERROR code in case
1157 * of error:
1158 * AVERROR(EINVAL) if the key/value pair cannot be parsed,
1159 * the error code issued by av_opt_set() if the key/value pair
1160 * cannot be set
1161 */
1162static int parse_key_value_pair(void *ctx, const char **buf,
1163 const char *key_val_sep, const char *pairs_sep)
1164{
1165 char *key = av_get_token(buf, key_val_sep);
1166 char *val;
1167 int ret;
1168
1169 if (!key)
1170 return AVERROR(ENOMEM);
1171
1172 if (*key && strspn(*buf, key_val_sep)) {
1173 (*buf)++;
1174 val = av_get_token(buf, pairs_sep);
1175 if (!val) {
1176 av_freep(&key);
1177 return AVERROR(ENOMEM);
1178 }
1179 } else {
1180 av_log(ctx, AV_LOG_ERROR, "Missing key or no key/value separator found after key '%s'\n", key);
1181 av_free(key);
1182 return AVERROR(EINVAL);
1183 }
1184
1185 av_log(ctx, AV_LOG_DEBUG, "Setting entry with key '%s' to value '%s'\n", key, val);
1186
1187 ret = av_opt_set(ctx, key, val, AV_OPT_SEARCH_CHILDREN);
1188 if (ret == AVERROR_OPTION_NOT_FOUND)
1189 av_log(ctx, AV_LOG_ERROR, "Key '%s' not found.\n", key);
1190
1191 av_free(key);
1192 av_free(val);
1193 return ret;
1194}
1195
1196int av_set_options_string(void *ctx, const char *opts,
1197 const char *key_val_sep, const char *pairs_sep)
1198{
1199 int ret, count = 0;
1200
1201 if (!opts)
1202 return 0;
1203
1204 while (*opts) {
1205 if ((ret = parse_key_value_pair(ctx, &opts, key_val_sep, pairs_sep)) < 0)
1206 return ret;
1207 count++;
1208
1209 if (*opts)
1210 opts++;
1211 }
1212
1213 return count;
1214}
1215
1216#define WHITESPACES " \n\t"
1217
1218static int is_key_char(char c)
1219{
1220 return (unsigned)((c | 32) - 'a') < 26 ||
1221 (unsigned)(c - '0') < 10 ||
1222 c == '-' || c == '_' || c == '/' || c == '.';
1223}
1224
1225/**
1226 * Read a key from a string.
1227 *
1228 * The key consists of is_key_char characters and must be terminated by a
1229 * character from the delim string; spaces are ignored.
1230 *
1231 * @return 0 for success (even with ellipsis), <0 for failure
1232 */
1233static int get_key(const char **ropts, const char *delim, char **rkey)
1234{
1235 const char *opts = *ropts;
1236 const char *key_start, *key_end;
1237
1238 key_start = opts += strspn(opts, WHITESPACES);
1239 while (is_key_char(*opts))
1240 opts++;
1241 key_end = opts;
1242 opts += strspn(opts, WHITESPACES);
1243 if (!*opts || !strchr(delim, *opts))
1244 return AVERROR(EINVAL);
1245 opts++;
1246 if (!(*rkey = av_malloc(key_end - key_start + 1)))
1247 return AVERROR(ENOMEM);
1248 memcpy(*rkey, key_start, key_end - key_start);
1249 (*rkey)[key_end - key_start] = 0;
1250 *ropts = opts;
1251 return 0;
1252}
1253
1254int av_opt_get_key_value(const char **ropts,
1255 const char *key_val_sep, const char *pairs_sep,
1256 unsigned flags,
1257 char **rkey, char **rval)
1258{
1259 int ret;
1260 char *key = NULL, *val;
1261 const char *opts = *ropts;
1262
1263 if ((ret = get_key(&opts, key_val_sep, &key)) < 0 &&
1264 !(flags & AV_OPT_FLAG_IMPLICIT_KEY))
1265 return AVERROR(EINVAL);
1266 if (!(val = av_get_token(&opts, pairs_sep))) {
1267 av_free(key);
1268 return AVERROR(ENOMEM);
1269 }
1270 *ropts = opts;
1271 *rkey = key;
1272 *rval = val;
1273 return 0;
1274}
1275
1276int av_opt_set_from_string(void *ctx, const char *opts,
1277 const char *const *shorthand,
1278 const char *key_val_sep, const char *pairs_sep)
1279{
1280 int ret, count = 0;
1281 const char *dummy_shorthand = NULL;
1282 char *av_uninit(parsed_key), *av_uninit(value);
1283 const char *key;
1284
1285 if (!opts)
1286 return 0;
1287 if (!shorthand)
1288 shorthand = &dummy_shorthand;
1289
1290 while (*opts) {
1291 ret = av_opt_get_key_value(&opts, key_val_sep, pairs_sep,
1292 *shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,
1293 &parsed_key, &value);
1294 if (ret < 0) {
1295 if (ret == AVERROR(EINVAL))
1296 av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", opts);
1297 else
1298 av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", opts,
1299 av_err2str(ret));
1300 return ret;
1301 }
1302 if (*opts)
1303 opts++;
1304 if (parsed_key) {
1305 key = parsed_key;
1306 while (*shorthand) /* discard all remaining shorthand */
1307 shorthand++;
1308 } else {
1309 key = *(shorthand++);
1310 }
1311
1312 av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);
1313 if ((ret = av_opt_set(ctx, key, value, 0)) < 0) {
1314 if (ret == AVERROR_OPTION_NOT_FOUND)
1315 av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);
1316 av_free(value);
1317 av_free(parsed_key);
1318 return ret;
1319 }
1320
1321 av_free(value);
1322 av_free(parsed_key);
1323 count++;
1324 }
1325 return count;
1326}
1327
1328void av_opt_free(void *obj)
1329{
1330 const AVOption *o = NULL;
1331 while ((o = av_opt_next(obj, o)))
1332 if (o->type == AV_OPT_TYPE_STRING || o->type == AV_OPT_TYPE_BINARY)
1333 av_freep((uint8_t *)obj + o->offset);
1334}
1335
1336int av_opt_set_dict(void *obj, AVDictionary **options)
1337{
1338 AVDictionaryEntry *t = NULL;
1339 AVDictionary *tmp = NULL;
1340 int ret = 0;
1341
1342 while ((t = av_dict_get(*options, "", t, AV_DICT_IGNORE_SUFFIX))) {
1343 ret = av_opt_set(obj, t->key, t->value, 0);
1344 if (ret == AVERROR_OPTION_NOT_FOUND)
1345 av_dict_set(&tmp, t->key, t->value, 0);
1346 else if (ret < 0) {
1347 av_log(obj, AV_LOG_ERROR, "Error setting option %s to value %s.\n", t->key, t->value);
1348 break;
1349 }
1350 ret = 0;
1351 }
1352 av_dict_free(options);
1353 *options = tmp;
1354 return ret;
1355}
1356
1357const AVOption *av_opt_find(void *obj, const char *name, const char *unit,
1358 int opt_flags, int search_flags)
1359{
1360 return av_opt_find2(obj, name, unit, opt_flags, search_flags, NULL);
1361}
1362
1363const AVOption *av_opt_find2(void *obj, const char *name, const char *unit,
1364 int opt_flags, int search_flags, void **target_obj)
1365{
1366 const AVClass *c;
1367 const AVOption *o = NULL;
1368
1369 if(!obj)
1370 return NULL;
1371
1372 c= *(AVClass**)obj;
1373
1374 if (!c)
1375 return NULL;
1376
1377 if (search_flags & AV_OPT_SEARCH_CHILDREN) {
1378 if (search_flags & AV_OPT_SEARCH_FAKE_OBJ) {
1379 const AVClass *child = NULL;
1380 while (child = av_opt_child_class_next(c, child))
1381 if (o = av_opt_find2(&child, name, unit, opt_flags, search_flags, NULL))
1382 return o;
1383 } else {
1384 void *child = NULL;
1385 while (child = av_opt_child_next(obj, child))
1386 if (o = av_opt_find2(child, name, unit, opt_flags, search_flags, target_obj))
1387 return o;
1388 }
1389 }
1390
1391 while (o = av_opt_next(obj, o)) {
1392 if (!strcmp(o->name, name) && (o->flags & opt_flags) == opt_flags &&
1393 ((!unit && o->type != AV_OPT_TYPE_CONST) ||
1394 (unit && o->type == AV_OPT_TYPE_CONST && o->unit && !strcmp(o->unit, unit)))) {
1395 if (target_obj) {
1396 if (!(search_flags & AV_OPT_SEARCH_FAKE_OBJ))
1397 *target_obj = obj;
1398 else
1399 *target_obj = NULL;
1400 }
1401 return o;
1402 }
1403 }
1404 return NULL;
1405}
1406
1407void *av_opt_child_next(void *obj, void *prev)
1408{
1409 const AVClass *c = *(AVClass**)obj;
1410 if (c->child_next)
1411 return c->child_next(obj, prev);
1412 return NULL;
1413}
1414
1415const AVClass *av_opt_child_class_next(const AVClass *parent, const AVClass *prev)
1416{
1417 if (parent->child_class_next)
1418 return parent->child_class_next(prev);
1419 return NULL;
1420}
1421
1422void *av_opt_ptr(const AVClass *class, void *obj, const char *name)
1423{
1424 const AVOption *opt= av_opt_find2(&class, name, NULL, 0, AV_OPT_SEARCH_FAKE_OBJ, NULL);
1425 if(!opt)
1426 return NULL;
1427 return (uint8_t*)obj + opt->offset;
1428}
1429
1430int av_opt_query_ranges(AVOptionRanges **ranges_arg, void *obj, const char *key, int flags)
1431{
1432 const AVClass *c = *(AVClass**)obj;
1433 int (*callback)(AVOptionRanges **, void *obj, const char *key, int flags) = NULL;
1434
1435 if (c->version > (52 << 16 | 11 << 8))
1436 callback = c->query_ranges;
1437
1438 if (!callback)
1439 callback = av_opt_query_ranges_default;
1440
1441 return callback(ranges_arg, obj, key, flags);
1442}
1443
1444int av_opt_query_ranges_default(AVOptionRanges **ranges_arg, void *obj, const char *key, int flags)
1445{
1446 AVOptionRanges *ranges = av_mallocz(sizeof(*ranges));
1447 AVOptionRange **range_array = av_mallocz(sizeof(void*));
1448 AVOptionRange *range = av_mallocz(sizeof(*range));
1449 const AVOption *field = av_opt_find(obj, key, NULL, 0, flags);
1450 int ret;
1451
1452 *ranges_arg = NULL;
1453
1454 if (!ranges || !range || !range_array || !field) {
1455 ret = AVERROR(ENOMEM);
1456 goto fail;
1457 }
1458
1459 ranges->range = range_array;
1460 ranges->range[0] = range;
1461 ranges->nb_ranges = 1;
1462 range->is_range = 1;
1463 range->value_min = field->min;
1464 range->value_max = field->max;
1465
1466 switch (field->type) {
1467 case AV_OPT_TYPE_INT:
1468 case AV_OPT_TYPE_INT64:
1469 case AV_OPT_TYPE_PIXEL_FMT:
1470 case AV_OPT_TYPE_SAMPLE_FMT:
1471 case AV_OPT_TYPE_FLOAT:
1472 case AV_OPT_TYPE_DOUBLE:
1473 case AV_OPT_TYPE_DURATION:
1474 case AV_OPT_TYPE_COLOR:
1475 case AV_OPT_TYPE_CHANNEL_LAYOUT:
1476 break;
1477 case AV_OPT_TYPE_STRING:
1478 range->component_min = 0;
1479 range->component_max = 0x10FFFF; // max unicode value
1480 range->value_min = -1;
1481 range->value_max = INT_MAX;
1482 break;
1483 case AV_OPT_TYPE_RATIONAL:
1484 range->component_min = INT_MIN;
1485 range->component_max = INT_MAX;
1486 break;
1487 case AV_OPT_TYPE_IMAGE_SIZE:
1488 range->component_min = 0;
1489 range->component_max = INT_MAX/128/8;
1490 range->value_min = 0;
1491 range->value_max = INT_MAX/8;
1492 break;
1493 case AV_OPT_TYPE_VIDEO_RATE:
1494 range->component_min = 1;
1495 range->component_max = INT_MAX;
1496 range->value_min = 1;
1497 range->value_max = INT_MAX;
1498 break;
1499 default:
1500 ret = AVERROR(ENOSYS);
1501 goto fail;
1502 }
1503
1504 *ranges_arg = ranges;
1505 return 0;
1506fail:
1507 av_free(ranges);
1508 av_free(range);
1509 av_free(range_array);
1510 return ret;
1511}
1512
1513void av_opt_freep_ranges(AVOptionRanges **rangesp)
1514{
1515 int i;
1516 AVOptionRanges *ranges = *rangesp;
1517
1518 for (i = 0; i < ranges->nb_ranges; i++) {
1519 AVOptionRange *range = ranges->range[i];
1520 av_freep(&range->str);
1521 av_freep(&ranges->range[i]);
1522 }
1523 av_freep(&ranges->range);
1524 av_freep(rangesp);
1525}
1526
1527#ifdef TEST
1528
1529typedef struct TestContext
1530{
1531 const AVClass *class;
1532 int num;
1533 int toggle;
1534 char *string;
1535 int flags;
1536 AVRational rational;
1537 AVRational video_rate;
1538 int w, h;
1539 enum AVPixelFormat pix_fmt;
1540 enum AVSampleFormat sample_fmt;
1541 int64_t duration;
1542 uint8_t color[4];
1543 int64_t channel_layout;
1544} TestContext;
1545
1546#define OFFSET(x) offsetof(TestContext, x)
1547
1548#define TEST_FLAG_COOL 01
1549#define TEST_FLAG_LAME 02
1550#define TEST_FLAG_MU 04
1551
1552static const AVOption test_options[]= {
1553{"num", "set num", OFFSET(num), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 100 },
1554{"toggle", "set toggle", OFFSET(toggle), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1 },
1555{"rational", "set rational", OFFSET(rational), AV_OPT_TYPE_RATIONAL, {.dbl = 0}, 0, 10 },
1556{"string", "set string", OFFSET(string), AV_OPT_TYPE_STRING, {.str = "default"}, CHAR_MIN, CHAR_MAX },
1557{"flags", "set flags", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, 0, INT_MAX, 0, "flags" },
1558{"cool", "set cool flag ", 0, AV_OPT_TYPE_CONST, {.i64 = TEST_FLAG_COOL}, INT_MIN, INT_MAX, 0, "flags" },
1559{"lame", "set lame flag ", 0, AV_OPT_TYPE_CONST, {.i64 = TEST_FLAG_LAME}, INT_MIN, INT_MAX, 0, "flags" },
1560{"mu", "set mu flag ", 0, AV_OPT_TYPE_CONST, {.i64 = TEST_FLAG_MU}, INT_MIN, INT_MAX, 0, "flags" },
1561{"size", "set size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE,{0}, 0, 0 },
1562{"pix_fmt", "set pixfmt", OFFSET(pix_fmt), AV_OPT_TYPE_PIXEL_FMT, {.i64 = AV_PIX_FMT_NONE}, -1, AV_PIX_FMT_NB-1},
1563{"sample_fmt", "set samplefmt", OFFSET(sample_fmt), AV_OPT_TYPE_SAMPLE_FMT, {.i64 = AV_SAMPLE_FMT_NONE}, -1, AV_SAMPLE_FMT_NB-1},
1564{"video_rate", "set videorate", OFFSET(video_rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0 },
1565{"duration", "set duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, INT64_MAX},
1566{"color", "set color", OFFSET(color), AV_OPT_TYPE_COLOR, {.str = "pink"}, 0, 0},
1567{"cl", "set channel layout", OFFSET(channel_layout), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64 = AV_CH_LAYOUT_HEXAGONAL}, 0, INT64_MAX},
1568{NULL},
1569};
1570
1571static const char *test_get_name(void *ctx)
1572{
1573 return "test";
1574}
1575
1576static const AVClass test_class = {
1577 "TestContext",
1578 test_get_name,
1579 test_options
1580};
1581
1582int main(void)
1583{
1584 int i;
1585
1586 printf("\nTesting av_set_options_string()\n");
1587 {
1588 TestContext test_ctx = { 0 };
1589 static const char * const options[] = {
1590 "",
1591 ":",
1592 "=",
1593 "foo=:",
1594 ":=foo",
1595 "=foo",
1596 "foo=",
1597 "foo",
1598 "foo=val",
1599 "foo==val",
1600 "toggle=:",
1601 "string=:",
1602 "toggle=1 : foo",
1603 "toggle=100",
1604 "toggle==1",
1605 "flags=+mu-lame : num=42: toggle=0",
1606 "num=42 : string=blahblah",
1607 "rational=0 : rational=1/2 : rational=1/-1",
1608 "rational=-1/0",
1609 "size=1024x768",
1610 "size=pal",
1611 "size=bogus",
1612 "pix_fmt=yuv420p",
1613 "pix_fmt=2",
1614 "pix_fmt=bogus",
1615 "sample_fmt=s16",
1616 "sample_fmt=2",
1617 "sample_fmt=bogus",
1618 "video_rate=pal",
1619 "video_rate=25",
1620 "video_rate=30000/1001",
1621 "video_rate=30/1.001",
1622 "video_rate=bogus",
1623 "duration=bogus",
1624 "duration=123.45",
1625 "duration=1\\:23\\:45.67",
1626 "color=blue",
1627 "color=0x223300",
1628 "color=0x42FF07AA",
1629 "cl=stereo+downmix",
1630 "cl=foo",
1631 };
1632
1633 test_ctx.class = &test_class;
1634 av_opt_set_defaults(&test_ctx);
1635
1636 av_log_set_level(AV_LOG_DEBUG);
1637
1638 for (i=0; i < FF_ARRAY_ELEMS(options); i++) {
1639 av_log(&test_ctx, AV_LOG_DEBUG, "Setting options string '%s'\n", options[i]);
1640 if (av_set_options_string(&test_ctx, options[i], "=", ":") < 0)
1641 av_log(&test_ctx, AV_LOG_ERROR, "Error setting options string: '%s'\n", options[i]);
1642 printf("\n");
1643 }
1644 av_opt_free(&test_ctx);
1645 }
1646
1647 printf("\nTesting av_opt_set_from_string()\n");
1648 {
1649 TestContext test_ctx = { 0 };
1650 static const char * const options[] = {
1651 "",
1652 "5",
1653 "5:hello",
1654 "5:hello:size=pal",
1655 "5:size=pal:hello",
1656 ":",
1657 "=",
1658 " 5 : hello : size = pal ",
1659 "a_very_long_option_name_that_will_need_to_be_ellipsized_around_here=42"
1660 };
1661 static const char * const shorthand[] = { "num", "string", NULL };
1662
1663 test_ctx.class = &test_class;
1664 av_opt_set_defaults(&test_ctx);
1665
1666 av_log_set_level(AV_LOG_DEBUG);
1667
1668 for (i=0; i < FF_ARRAY_ELEMS(options); i++) {
1669 av_log(&test_ctx, AV_LOG_DEBUG, "Setting options string '%s'\n", options[i]);
1670 if (av_opt_set_from_string(&test_ctx, options[i], shorthand, "=", ":") < 0)
1671 av_log(&test_ctx, AV_LOG_ERROR, "Error setting options string: '%s'\n", options[i]);
1672 printf("\n");
1673 }
1674 av_opt_free(&test_ctx);
1675 }
1676
1677 return 0;
1678}
1679
1680#endif
1681
generated by cgit at 2024-05-17 05:00:02 (GMT)