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 "avassert.h"
30 #include "avstring.h"
31 #include "channel_layout.h"
32 #include "common.h"
33 #include "dict.h"
34 #include "eval.h"
35 #include "log.h"
36 #include "parseutils.h"
37 #include "pixdesc.h"
38 #include "mathematics.h"
39 #include "opt.h"
40 #include "samplefmt.h"
41 #include "bprint.h"
42
43 #include <float.h>
44
av_opt_next(const void * obj,const AVOption * last)45 const AVOption *av_opt_next(const void *obj, const AVOption *last)
46 {
47 const AVClass *class;
48 if (!obj)
49 return NULL;
50 class = *(const AVClass**)obj;
51 if (!last && class && class->option && class->option[0].name)
52 return class->option;
53 if (last && last[1].name)
54 return ++last;
55 return NULL;
56 }
57
read_number(const AVOption * o,const void * dst,double * num,int * den,int64_t * intnum)58 static int read_number(const AVOption *o, const void *dst, double *num, int *den, int64_t *intnum)
59 {
60 switch (o->type) {
61 case AV_OPT_TYPE_FLAGS:
62 *intnum = *(unsigned int*)dst;
63 return 0;
64 case AV_OPT_TYPE_PIXEL_FMT:
65 *intnum = *(enum AVPixelFormat *)dst;
66 return 0;
67 case AV_OPT_TYPE_SAMPLE_FMT:
68 *intnum = *(enum AVSampleFormat *)dst;
69 return 0;
70 case AV_OPT_TYPE_BOOL:
71 case AV_OPT_TYPE_INT:
72 *intnum = *(int *)dst;
73 return 0;
74 case AV_OPT_TYPE_CHANNEL_LAYOUT:
75 case AV_OPT_TYPE_DURATION:
76 case AV_OPT_TYPE_INT64:
77 case AV_OPT_TYPE_UINT64:
78 *intnum = *(int64_t *)dst;
79 return 0;
80 case AV_OPT_TYPE_FLOAT:
81 *num = *(float *)dst;
82 return 0;
83 case AV_OPT_TYPE_DOUBLE:
84 *num = *(double *)dst;
85 return 0;
86 case AV_OPT_TYPE_RATIONAL:
87 *intnum = ((AVRational *)dst)->num;
88 *den = ((AVRational *)dst)->den;
89 return 0;
90 case AV_OPT_TYPE_CONST:
91 *num = o->default_val.dbl;
92 return 0;
93 }
94 return AVERROR(EINVAL);
95 }
96
write_number(void * obj,const AVOption * o,void * dst,double num,int den,int64_t intnum)97 static int write_number(void *obj, const AVOption *o, void *dst, double num, int den, int64_t intnum)
98 {
99 if (o->type != AV_OPT_TYPE_FLAGS &&
100 (!den || o->max * den < num * intnum || o->min * den > num * intnum)) {
101 num = den ? num * intnum / den : (num && intnum ? INFINITY : NAN);
102 av_log(obj, AV_LOG_ERROR, "Value %f for parameter '%s' out of range [%g - %g]\n",
103 num, o->name, o->min, o->max);
104 return AVERROR(ERANGE);
105 }
106 if (o->type == AV_OPT_TYPE_FLAGS) {
107 double d = num*intnum/den;
108 if (d < -1.5 || d > 0xFFFFFFFF+0.5 || (llrint(d*256) & 255)) {
109 av_log(obj, AV_LOG_ERROR,
110 "Value %f for parameter '%s' is not a valid set of 32bit integer flags\n",
111 num*intnum/den, o->name);
112 return AVERROR(ERANGE);
113 }
114 }
115
116 switch (o->type) {
117 case AV_OPT_TYPE_PIXEL_FMT:
118 *(enum AVPixelFormat *)dst = llrint(num / den) * intnum;
119 break;
120 case AV_OPT_TYPE_SAMPLE_FMT:
121 *(enum AVSampleFormat *)dst = llrint(num / den) * intnum;
122 break;
123 case AV_OPT_TYPE_BOOL:
124 case AV_OPT_TYPE_FLAGS:
125 case AV_OPT_TYPE_INT:
126 *(int *)dst = llrint(num / den) * intnum;
127 break;
128 case AV_OPT_TYPE_DURATION:
129 case AV_OPT_TYPE_CHANNEL_LAYOUT:
130 case AV_OPT_TYPE_INT64:{
131 double d = num / den;
132 if (intnum == 1 && d == (double)INT64_MAX) {
133 *(int64_t *)dst = INT64_MAX;
134 } else
135 *(int64_t *)dst = llrint(d) * intnum;
136 break;}
137 case AV_OPT_TYPE_UINT64:{
138 double d = num / den;
139 // We must special case uint64_t here as llrint() does not support values
140 // outside the int64_t range and there is no portable function which does
141 // "INT64_MAX + 1ULL" is used as it is representable exactly as IEEE double
142 // while INT64_MAX is not
143 if (intnum == 1 && d == (double)UINT64_MAX) {
144 *(uint64_t *)dst = UINT64_MAX;
145 } else if (d > INT64_MAX + 1ULL) {
146 *(uint64_t *)dst = (llrint(d - (INT64_MAX + 1ULL)) + (INT64_MAX + 1ULL))*intnum;
147 } else {
148 *(uint64_t *)dst = llrint(d) * intnum;
149 }
150 break;}
151 case AV_OPT_TYPE_FLOAT:
152 *(float *)dst = num * intnum / den;
153 break;
154 case AV_OPT_TYPE_DOUBLE:
155 *(double *)dst = num * intnum / den;
156 break;
157 case AV_OPT_TYPE_RATIONAL:
158 case AV_OPT_TYPE_VIDEO_RATE:
159 if ((int) num == num)
160 *(AVRational *)dst = (AVRational) { num *intnum, den };
161 else
162 *(AVRational *)dst = av_d2q(num * intnum / den, 1 << 24);
163 break;
164 default:
165 return AVERROR(EINVAL);
166 }
167 return 0;
168 }
169
hexchar2int(char c)170 static int hexchar2int(char c) {
171 if (c >= '0' && c <= '9')
172 return c - '0';
173 if (c >= 'a' && c <= 'f')
174 return c - 'a' + 10;
175 if (c >= 'A' && c <= 'F')
176 return c - 'A' + 10;
177 return -1;
178 }
179
set_string_binary(void * obj,const AVOption * o,const char * val,uint8_t ** dst)180 static int set_string_binary(void *obj, const AVOption *o, const char *val, uint8_t **dst)
181 {
182 int *lendst = (int *)(dst + 1);
183 uint8_t *bin, *ptr;
184 int len;
185
186 av_freep(dst);
187 *lendst = 0;
188
189 if (!val || !(len = strlen(val)))
190 return 0;
191
192 if (len & 1)
193 return AVERROR(EINVAL);
194 len /= 2;
195
196 ptr = bin = av_malloc(len);
197 if (!ptr)
198 return AVERROR(ENOMEM);
199 while (*val) {
200 int a = hexchar2int(*val++);
201 int b = hexchar2int(*val++);
202 if (a < 0 || b < 0) {
203 av_free(bin);
204 return AVERROR(EINVAL);
205 }
206 *ptr++ = (a << 4) | b;
207 }
208 *dst = bin;
209 *lendst = len;
210
211 return 0;
212 }
213
set_string(void * obj,const AVOption * o,const char * val,uint8_t ** dst)214 static int set_string(void *obj, const AVOption *o, const char *val, uint8_t **dst)
215 {
216 av_freep(dst);
217 *dst = av_strdup(val);
218 return *dst ? 0 : AVERROR(ENOMEM);
219 }
220
221 #define DEFAULT_NUMVAL(opt) ((opt->type == AV_OPT_TYPE_INT64 || \
222 opt->type == AV_OPT_TYPE_UINT64 || \
223 opt->type == AV_OPT_TYPE_CONST || \
224 opt->type == AV_OPT_TYPE_FLAGS || \
225 opt->type == AV_OPT_TYPE_INT) \
226 ? opt->default_val.i64 \
227 : opt->default_val.dbl)
228
set_string_number(void * obj,void * target_obj,const AVOption * o,const char * val,void * dst)229 static int set_string_number(void *obj, void *target_obj, const AVOption *o, const char *val, void *dst)
230 {
231 int ret = 0;
232 int num, den;
233 char c;
234
235 if (sscanf(val, "%d%*1[:/]%d%c", &num, &den, &c) == 2) {
236 if ((ret = write_number(obj, o, dst, 1, den, num)) >= 0)
237 return ret;
238 ret = 0;
239 }
240
241 for (;;) {
242 int i = 0;
243 char buf[256];
244 int cmd = 0;
245 double d;
246 int64_t intnum = 1;
247
248 if (o->type == AV_OPT_TYPE_FLAGS) {
249 if (*val == '+' || *val == '-')
250 cmd = *(val++);
251 for (; i < sizeof(buf) - 1 && val[i] && val[i] != '+' && val[i] != '-'; i++)
252 buf[i] = val[i];
253 buf[i] = 0;
254 }
255
256 {
257 const AVOption *o_named = av_opt_find(target_obj, i ? buf : val, o->unit, 0, 0);
258 int res;
259 int ci = 0;
260 double const_values[64];
261 const char * const_names[64];
262 if (o_named && o_named->type == AV_OPT_TYPE_CONST)
263 d = DEFAULT_NUMVAL(o_named);
264 else {
265 if (o->unit) {
266 for (o_named = NULL; o_named = av_opt_next(target_obj, o_named); ) {
267 if (o_named->type == AV_OPT_TYPE_CONST &&
268 o_named->unit &&
269 !strcmp(o_named->unit, o->unit)) {
270 if (ci + 6 >= FF_ARRAY_ELEMS(const_values)) {
271 av_log(obj, AV_LOG_ERROR, "const_values array too small for %s\n", o->unit);
272 return AVERROR_PATCHWELCOME;
273 }
274 const_names [ci ] = o_named->name;
275 const_values[ci++] = DEFAULT_NUMVAL(o_named);
276 }
277 }
278 }
279 const_names [ci ] = "default";
280 const_values[ci++] = DEFAULT_NUMVAL(o);
281 const_names [ci ] = "max";
282 const_values[ci++] = o->max;
283 const_names [ci ] = "min";
284 const_values[ci++] = o->min;
285 const_names [ci ] = "none";
286 const_values[ci++] = 0;
287 const_names [ci ] = "all";
288 const_values[ci++] = ~0;
289 const_names [ci] = NULL;
290 const_values[ci] = 0;
291
292 res = av_expr_parse_and_eval(&d, i ? buf : val, const_names,
293 const_values, NULL, NULL, NULL, NULL, NULL, 0, obj);
294 if (res < 0) {
295 av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\"\n", val);
296 return res;
297 }
298 }
299 }
300 if (o->type == AV_OPT_TYPE_FLAGS) {
301 read_number(o, dst, NULL, NULL, &intnum);
302 if (cmd == '+')
303 d = intnum | (int64_t)d;
304 else if (cmd == '-')
305 d = intnum &~(int64_t)d;
306 }
307
308 if ((ret = write_number(obj, o, dst, d, 1, 1)) < 0)
309 return ret;
310 val += i;
311 if (!i || !*val)
312 return 0;
313 }
314 }
315
set_string_image_size(void * obj,const AVOption * o,const char * val,int * dst)316 static int set_string_image_size(void *obj, const AVOption *o, const char *val, int *dst)
317 {
318 int ret;
319
320 if (!val || !strcmp(val, "none")) {
321 dst[0] =
322 dst[1] = 0;
323 return 0;
324 }
325 ret = av_parse_video_size(dst, dst + 1, val);
326 if (ret < 0)
327 av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as image size\n", val);
328 return ret;
329 }
330
set_string_video_rate(void * obj,const AVOption * o,const char * val,AVRational * dst)331 static int set_string_video_rate(void *obj, const AVOption *o, const char *val, AVRational *dst)
332 {
333 int ret;
334 if (!val) {
335 ret = AVERROR(EINVAL);
336 } else {
337 ret = av_parse_video_rate(dst, val);
338 }
339 if (ret < 0)
340 av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as video rate\n", val);
341 return ret;
342 }
343
set_string_color(void * obj,const AVOption * o,const char * val,uint8_t * dst)344 static int set_string_color(void *obj, const AVOption *o, const char *val, uint8_t *dst)
345 {
346 int ret;
347
348 if (!val) {
349 return 0;
350 } else {
351 ret = av_parse_color(dst, val, -1, obj);
352 if (ret < 0)
353 av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as color\n", val);
354 return ret;
355 }
356 return 0;
357 }
358
get_bool_name(int val)359 static const char *get_bool_name(int val)
360 {
361 if (val < 0)
362 return "auto";
363 return val ? "true" : "false";
364 }
365
set_string_bool(void * obj,const AVOption * o,const char * val,int * dst)366 static int set_string_bool(void *obj, const AVOption *o, const char *val, int *dst)
367 {
368 int n;
369
370 if (!val)
371 return 0;
372
373 if (!strcmp(val, "auto")) {
374 n = -1;
375 } else if (av_match_name(val, "true,y,yes,enable,enabled,on")) {
376 n = 1;
377 } else if (av_match_name(val, "false,n,no,disable,disabled,off")) {
378 n = 0;
379 } else {
380 char *end = NULL;
381 n = strtol(val, &end, 10);
382 if (val + strlen(val) != end)
383 goto fail;
384 }
385
386 if (n < o->min || n > o->max)
387 goto fail;
388
389 *dst = n;
390 return 0;
391
392 fail:
393 av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as boolean\n", val);
394 return AVERROR(EINVAL);
395 }
396
set_string_fmt(void * obj,const AVOption * o,const char * val,uint8_t * dst,int fmt_nb,int ((* get_fmt)(const char *)),const char * desc)397 static int set_string_fmt(void *obj, const AVOption *o, const char *val, uint8_t *dst,
398 int fmt_nb, int ((*get_fmt)(const char *)), const char *desc)
399 {
400 int fmt, min, max;
401
402 if (!val || !strcmp(val, "none")) {
403 fmt = -1;
404 } else {
405 fmt = get_fmt(val);
406 if (fmt == -1) {
407 char *tail;
408 fmt = strtol(val, &tail, 0);
409 if (*tail || (unsigned)fmt >= fmt_nb) {
410 av_log(obj, AV_LOG_ERROR,
411 "Unable to parse option value \"%s\" as %s\n", val, desc);
412 return AVERROR(EINVAL);
413 }
414 }
415 }
416
417 min = FFMAX(o->min, -1);
418 max = FFMIN(o->max, fmt_nb-1);
419
420 // hack for compatibility with old ffmpeg
421 if(min == 0 && max == 0) {
422 min = -1;
423 max = fmt_nb-1;
424 }
425
426 if (fmt < min || fmt > max) {
427 av_log(obj, AV_LOG_ERROR,
428 "Value %d for parameter '%s' out of %s format range [%d - %d]\n",
429 fmt, o->name, desc, min, max);
430 return AVERROR(ERANGE);
431 }
432
433 *(int *)dst = fmt;
434 return 0;
435 }
436
set_string_pixel_fmt(void * obj,const AVOption * o,const char * val,uint8_t * dst)437 static int set_string_pixel_fmt(void *obj, const AVOption *o, const char *val, uint8_t *dst)
438 {
439 return set_string_fmt(obj, o, val, dst,
440 AV_PIX_FMT_NB, av_get_pix_fmt, "pixel format");
441 }
442
set_string_sample_fmt(void * obj,const AVOption * o,const char * val,uint8_t * dst)443 static int set_string_sample_fmt(void *obj, const AVOption *o, const char *val, uint8_t *dst)
444 {
445 return set_string_fmt(obj, o, val, dst,
446 AV_SAMPLE_FMT_NB, av_get_sample_fmt, "sample format");
447 }
448
av_opt_set(void * obj,const char * name,const char * val,int search_flags)449 int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
450 {
451 int ret = 0;
452 void *dst, *target_obj;
453 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
454 if (!o || !target_obj)
455 return AVERROR_OPTION_NOT_FOUND;
456 if (!val && (o->type != AV_OPT_TYPE_STRING &&
457 o->type != AV_OPT_TYPE_PIXEL_FMT && o->type != AV_OPT_TYPE_SAMPLE_FMT &&
458 o->type != AV_OPT_TYPE_IMAGE_SIZE && o->type != AV_OPT_TYPE_VIDEO_RATE &&
459 o->type != AV_OPT_TYPE_DURATION && o->type != AV_OPT_TYPE_COLOR &&
460 o->type != AV_OPT_TYPE_CHANNEL_LAYOUT && o->type != AV_OPT_TYPE_BOOL))
461 return AVERROR(EINVAL);
462
463 if (o->flags & AV_OPT_FLAG_READONLY)
464 return AVERROR(EINVAL);
465
466 if (o->flags & AV_OPT_FLAG_DEPRECATED)
467 av_log(obj, AV_LOG_WARNING, "The \"%s\" option is deprecated: %s\n", name, o->help);
468
469 dst = ((uint8_t *)target_obj) + o->offset;
470 switch (o->type) {
471 case AV_OPT_TYPE_BOOL:
472 return set_string_bool(obj, o, val, dst);
473 case AV_OPT_TYPE_STRING:
474 return set_string(obj, o, val, dst);
475 case AV_OPT_TYPE_BINARY:
476 return set_string_binary(obj, o, val, dst);
477 case AV_OPT_TYPE_FLAGS:
478 case AV_OPT_TYPE_INT:
479 case AV_OPT_TYPE_INT64:
480 case AV_OPT_TYPE_UINT64:
481 case AV_OPT_TYPE_FLOAT:
482 case AV_OPT_TYPE_DOUBLE:
483 case AV_OPT_TYPE_RATIONAL:
484 return set_string_number(obj, target_obj, o, val, dst);
485 case AV_OPT_TYPE_IMAGE_SIZE:
486 return set_string_image_size(obj, o, val, dst);
487 case AV_OPT_TYPE_VIDEO_RATE: {
488 AVRational tmp;
489 ret = set_string_video_rate(obj, o, val, &tmp);
490 if (ret < 0)
491 return ret;
492 return write_number(obj, o, dst, 1, tmp.den, tmp.num);
493 }
494 case AV_OPT_TYPE_PIXEL_FMT:
495 return set_string_pixel_fmt(obj, o, val, dst);
496 case AV_OPT_TYPE_SAMPLE_FMT:
497 return set_string_sample_fmt(obj, o, val, dst);
498 case AV_OPT_TYPE_DURATION:
499 {
500 int64_t usecs = 0;
501 if (val) {
502 if ((ret = av_parse_time(&usecs, val, 1)) < 0) {
503 av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as duration\n", val);
504 return ret;
505 }
506 }
507 if (usecs < o->min || usecs > o->max) {
508 av_log(obj, AV_LOG_ERROR, "Value %f for parameter '%s' out of range [%g - %g]\n",
509 usecs / 1000000.0, o->name, o->min / 1000000.0, o->max / 1000000.0);
510 return AVERROR(ERANGE);
511 }
512 *(int64_t *)dst = usecs;
513 return 0;
514 }
515 case AV_OPT_TYPE_COLOR:
516 return set_string_color(obj, o, val, dst);
517 case AV_OPT_TYPE_CHANNEL_LAYOUT:
518 if (!val || !strcmp(val, "none")) {
519 *(int64_t *)dst = 0;
520 } else {
521 int64_t cl = av_get_channel_layout(val);
522 if (!cl) {
523 av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as channel layout\n", val);
524 ret = AVERROR(EINVAL);
525 }
526 *(int64_t *)dst = cl;
527 return ret;
528 }
529 break;
530 }
531
532 av_log(obj, AV_LOG_ERROR, "Invalid option type.\n");
533 return AVERROR(EINVAL);
534 }
535
536 #define OPT_EVAL_NUMBER(name, opttype, vartype) \
537 int av_opt_eval_ ## name(void *obj, const AVOption *o, \
538 const char *val, vartype *name ## _out) \
539 { \
540 if (!o || o->type != opttype || o->flags & AV_OPT_FLAG_READONLY) \
541 return AVERROR(EINVAL); \
542 return set_string_number(obj, obj, o, val, name ## _out); \
543 }
544
OPT_EVAL_NUMBER(flags,AV_OPT_TYPE_FLAGS,int)545 OPT_EVAL_NUMBER(flags, AV_OPT_TYPE_FLAGS, int)
546 OPT_EVAL_NUMBER(int, AV_OPT_TYPE_INT, int)
547 OPT_EVAL_NUMBER(int64, AV_OPT_TYPE_INT64, int64_t)
548 OPT_EVAL_NUMBER(float, AV_OPT_TYPE_FLOAT, float)
549 OPT_EVAL_NUMBER(double, AV_OPT_TYPE_DOUBLE, double)
550 OPT_EVAL_NUMBER(q, AV_OPT_TYPE_RATIONAL, AVRational)
551
552 static int set_number(void *obj, const char *name, double num, int den, int64_t intnum,
553 int search_flags)
554 {
555 void *dst, *target_obj;
556 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
557
558 if (!o || !target_obj)
559 return AVERROR_OPTION_NOT_FOUND;
560
561 if (o->flags & AV_OPT_FLAG_READONLY)
562 return AVERROR(EINVAL);
563
564 dst = ((uint8_t *)target_obj) + o->offset;
565 return write_number(obj, o, dst, num, den, intnum);
566 }
567
av_opt_set_int(void * obj,const char * name,int64_t val,int search_flags)568 int av_opt_set_int(void *obj, const char *name, int64_t val, int search_flags)
569 {
570 return set_number(obj, name, 1, 1, val, search_flags);
571 }
572
av_opt_set_double(void * obj,const char * name,double val,int search_flags)573 int av_opt_set_double(void *obj, const char *name, double val, int search_flags)
574 {
575 return set_number(obj, name, val, 1, 1, search_flags);
576 }
577
av_opt_set_q(void * obj,const char * name,AVRational val,int search_flags)578 int av_opt_set_q(void *obj, const char *name, AVRational val, int search_flags)
579 {
580 return set_number(obj, name, val.num, val.den, 1, search_flags);
581 }
582
av_opt_set_bin(void * obj,const char * name,const uint8_t * val,int len,int search_flags)583 int av_opt_set_bin(void *obj, const char *name, const uint8_t *val, int len, int search_flags)
584 {
585 void *target_obj;
586 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
587 uint8_t *ptr;
588 uint8_t **dst;
589 int *lendst;
590
591 if (!o || !target_obj)
592 return AVERROR_OPTION_NOT_FOUND;
593
594 if (o->type != AV_OPT_TYPE_BINARY || o->flags & AV_OPT_FLAG_READONLY)
595 return AVERROR(EINVAL);
596
597 ptr = len ? av_malloc(len) : NULL;
598 if (len && !ptr)
599 return AVERROR(ENOMEM);
600
601 dst = (uint8_t **)(((uint8_t *)target_obj) + o->offset);
602 lendst = (int *)(dst + 1);
603
604 av_free(*dst);
605 *dst = ptr;
606 *lendst = len;
607 if (len)
608 memcpy(ptr, val, len);
609
610 return 0;
611 }
612
av_opt_set_image_size(void * obj,const char * name,int w,int h,int search_flags)613 int av_opt_set_image_size(void *obj, const char *name, int w, int h, int search_flags)
614 {
615 void *target_obj;
616 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
617
618 if (!o || !target_obj)
619 return AVERROR_OPTION_NOT_FOUND;
620 if (o->type != AV_OPT_TYPE_IMAGE_SIZE) {
621 av_log(obj, AV_LOG_ERROR,
622 "The value set by option '%s' is not an image size.\n", o->name);
623 return AVERROR(EINVAL);
624 }
625 if (w<0 || h<0) {
626 av_log(obj, AV_LOG_ERROR,
627 "Invalid negative size value %dx%d for size '%s'\n", w, h, o->name);
628 return AVERROR(EINVAL);
629 }
630 *(int *)(((uint8_t *)target_obj) + o->offset) = w;
631 *(int *)(((uint8_t *)target_obj+sizeof(int)) + o->offset) = h;
632 return 0;
633 }
634
av_opt_set_video_rate(void * obj,const char * name,AVRational val,int search_flags)635 int av_opt_set_video_rate(void *obj, const char *name, AVRational val, int search_flags)
636 {
637 void *target_obj;
638 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
639
640 if (!o || !target_obj)
641 return AVERROR_OPTION_NOT_FOUND;
642 if (o->type != AV_OPT_TYPE_VIDEO_RATE) {
643 av_log(obj, AV_LOG_ERROR,
644 "The value set by option '%s' is not a video rate.\n", o->name);
645 return AVERROR(EINVAL);
646 }
647 if (val.num <= 0 || val.den <= 0)
648 return AVERROR(EINVAL);
649 return set_number(obj, name, val.num, val.den, 1, search_flags);
650 }
651
set_format(void * obj,const char * name,int fmt,int search_flags,enum AVOptionType type,const char * desc,int nb_fmts)652 static int set_format(void *obj, const char *name, int fmt, int search_flags,
653 enum AVOptionType type, const char *desc, int nb_fmts)
654 {
655 void *target_obj;
656 const AVOption *o = av_opt_find2(obj, name, NULL, 0,
657 search_flags, &target_obj);
658 int min, max;
659
660 if (!o || !target_obj)
661 return AVERROR_OPTION_NOT_FOUND;
662 if (o->type != type) {
663 av_log(obj, AV_LOG_ERROR,
664 "The value set by option '%s' is not a %s format", name, desc);
665 return AVERROR(EINVAL);
666 }
667
668 min = FFMAX(o->min, -1);
669 max = FFMIN(o->max, nb_fmts-1);
670
671 if (fmt < min || fmt > max) {
672 av_log(obj, AV_LOG_ERROR,
673 "Value %d for parameter '%s' out of %s format range [%d - %d]\n",
674 fmt, name, desc, min, max);
675 return AVERROR(ERANGE);
676 }
677 *(int *)(((uint8_t *)target_obj) + o->offset) = fmt;
678 return 0;
679 }
680
av_opt_set_pixel_fmt(void * obj,const char * name,enum AVPixelFormat fmt,int search_flags)681 int av_opt_set_pixel_fmt(void *obj, const char *name, enum AVPixelFormat fmt, int search_flags)
682 {
683 return set_format(obj, name, fmt, search_flags, AV_OPT_TYPE_PIXEL_FMT, "pixel", AV_PIX_FMT_NB);
684 }
685
av_opt_set_sample_fmt(void * obj,const char * name,enum AVSampleFormat fmt,int search_flags)686 int av_opt_set_sample_fmt(void *obj, const char *name, enum AVSampleFormat fmt, int search_flags)
687 {
688 return set_format(obj, name, fmt, search_flags, AV_OPT_TYPE_SAMPLE_FMT, "sample", AV_SAMPLE_FMT_NB);
689 }
690
av_opt_set_channel_layout(void * obj,const char * name,int64_t cl,int search_flags)691 int av_opt_set_channel_layout(void *obj, const char *name, int64_t cl, int search_flags)
692 {
693 void *target_obj;
694 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
695
696 if (!o || !target_obj)
697 return AVERROR_OPTION_NOT_FOUND;
698 if (o->type != AV_OPT_TYPE_CHANNEL_LAYOUT) {
699 av_log(obj, AV_LOG_ERROR,
700 "The value set by option '%s' is not a channel layout.\n", o->name);
701 return AVERROR(EINVAL);
702 }
703 *(int64_t *)(((uint8_t *)target_obj) + o->offset) = cl;
704 return 0;
705 }
706
av_opt_set_dict_val(void * obj,const char * name,const AVDictionary * val,int search_flags)707 int av_opt_set_dict_val(void *obj, const char *name, const AVDictionary *val,
708 int search_flags)
709 {
710 void *target_obj;
711 AVDictionary **dst;
712 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
713
714 if (!o || !target_obj)
715 return AVERROR_OPTION_NOT_FOUND;
716 if (o->flags & AV_OPT_FLAG_READONLY)
717 return AVERROR(EINVAL);
718
719 dst = (AVDictionary **)(((uint8_t *)target_obj) + o->offset);
720 av_dict_free(dst);
721 av_dict_copy(dst, val, 0);
722
723 return 0;
724 }
725
format_duration(char * buf,size_t size,int64_t d)726 static void format_duration(char *buf, size_t size, int64_t d)
727 {
728 char *e;
729
730 av_assert0(size >= 25);
731 if (d < 0 && d != INT64_MIN) {
732 *(buf++) = '-';
733 size--;
734 d = -d;
735 }
736 if (d == INT64_MAX)
737 snprintf(buf, size, "INT64_MAX");
738 else if (d == INT64_MIN)
739 snprintf(buf, size, "INT64_MIN");
740 else if (d > (int64_t)3600*1000000)
741 snprintf(buf, size, "%"PRId64":%02d:%02d.%06d", d / 3600000000,
742 (int)((d / 60000000) % 60),
743 (int)((d / 1000000) % 60),
744 (int)(d % 1000000));
745 else if (d > 60*1000000)
746 snprintf(buf, size, "%d:%02d.%06d",
747 (int)(d / 60000000),
748 (int)((d / 1000000) % 60),
749 (int)(d % 1000000));
750 else
751 snprintf(buf, size, "%d.%06d",
752 (int)(d / 1000000),
753 (int)(d % 1000000));
754 e = buf + strlen(buf);
755 while (e > buf && e[-1] == '0')
756 *(--e) = 0;
757 if (e > buf && e[-1] == '.')
758 *(--e) = 0;
759 }
760
av_opt_get(void * obj,const char * name,int search_flags,uint8_t ** out_val)761 int av_opt_get(void *obj, const char *name, int search_flags, uint8_t **out_val)
762 {
763 void *dst, *target_obj;
764 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
765 uint8_t *bin, buf[128];
766 int len, i, ret;
767 int64_t i64;
768
769 if (!o || !target_obj || (o->offset<=0 && o->type != AV_OPT_TYPE_CONST))
770 return AVERROR_OPTION_NOT_FOUND;
771
772 if (o->flags & AV_OPT_FLAG_DEPRECATED)
773 av_log(obj, AV_LOG_WARNING, "The \"%s\" option is deprecated: %s\n", name, o->help);
774
775 dst = (uint8_t *)target_obj + o->offset;
776
777 buf[0] = 0;
778 switch (o->type) {
779 case AV_OPT_TYPE_BOOL:
780 ret = snprintf(buf, sizeof(buf), "%s", (char *)av_x_if_null(get_bool_name(*(int *)dst), "invalid"));
781 break;
782 case AV_OPT_TYPE_FLAGS:
783 ret = snprintf(buf, sizeof(buf), "0x%08X", *(int *)dst);
784 break;
785 case AV_OPT_TYPE_INT:
786 ret = snprintf(buf, sizeof(buf), "%d", *(int *)dst);
787 break;
788 case AV_OPT_TYPE_INT64:
789 ret = snprintf(buf, sizeof(buf), "%"PRId64, *(int64_t *)dst);
790 break;
791 case AV_OPT_TYPE_UINT64:
792 ret = snprintf(buf, sizeof(buf), "%"PRIu64, *(uint64_t *)dst);
793 break;
794 case AV_OPT_TYPE_FLOAT:
795 ret = snprintf(buf, sizeof(buf), "%f", *(float *)dst);
796 break;
797 case AV_OPT_TYPE_DOUBLE:
798 ret = snprintf(buf, sizeof(buf), "%f", *(double *)dst);
799 break;
800 case AV_OPT_TYPE_VIDEO_RATE:
801 case AV_OPT_TYPE_RATIONAL:
802 ret = snprintf(buf, sizeof(buf), "%d/%d", ((AVRational *)dst)->num, ((AVRational *)dst)->den);
803 break;
804 case AV_OPT_TYPE_CONST:
805 ret = snprintf(buf, sizeof(buf), "%f", o->default_val.dbl);
806 break;
807 case AV_OPT_TYPE_STRING:
808 if (*(uint8_t **)dst) {
809 *out_val = av_strdup(*(uint8_t **)dst);
810 } else if (search_flags & AV_OPT_ALLOW_NULL) {
811 *out_val = NULL;
812 return 0;
813 } else {
814 *out_val = av_strdup("");
815 }
816 return *out_val ? 0 : AVERROR(ENOMEM);
817 case AV_OPT_TYPE_BINARY:
818 if (!*(uint8_t **)dst && (search_flags & AV_OPT_ALLOW_NULL)) {
819 *out_val = NULL;
820 return 0;
821 }
822 len = *(int *)(((uint8_t *)dst) + sizeof(uint8_t *));
823 if ((uint64_t)len * 2 + 1 > INT_MAX)
824 return AVERROR(EINVAL);
825 if (!(*out_val = av_malloc(len * 2 + 1)))
826 return AVERROR(ENOMEM);
827 if (!len) {
828 *out_val[0] = '\0';
829 return 0;
830 }
831 bin = *(uint8_t **)dst;
832 for (i = 0; i < len; i++)
833 snprintf(*out_val + i * 2, 3, "%02X", bin[i]);
834 return 0;
835 case AV_OPT_TYPE_IMAGE_SIZE:
836 ret = snprintf(buf, sizeof(buf), "%dx%d", ((int *)dst)[0], ((int *)dst)[1]);
837 break;
838 case AV_OPT_TYPE_PIXEL_FMT:
839 ret = snprintf(buf, sizeof(buf), "%s", (char *)av_x_if_null(av_get_pix_fmt_name(*(enum AVPixelFormat *)dst), "none"));
840 break;
841 case AV_OPT_TYPE_SAMPLE_FMT:
842 ret = snprintf(buf, sizeof(buf), "%s", (char *)av_x_if_null(av_get_sample_fmt_name(*(enum AVSampleFormat *)dst), "none"));
843 break;
844 case AV_OPT_TYPE_DURATION:
845 i64 = *(int64_t *)dst;
846 format_duration(buf, sizeof(buf), i64);
847 ret = strlen(buf); // no overflow possible, checked by an assert
848 break;
849 case AV_OPT_TYPE_COLOR:
850 ret = snprintf(buf, sizeof(buf), "0x%02x%02x%02x%02x",
851 (int)((uint8_t *)dst)[0], (int)((uint8_t *)dst)[1],
852 (int)((uint8_t *)dst)[2], (int)((uint8_t *)dst)[3]);
853 break;
854 case AV_OPT_TYPE_CHANNEL_LAYOUT:
855 i64 = *(int64_t *)dst;
856 ret = snprintf(buf, sizeof(buf), "0x%"PRIx64, i64);
857 break;
858 default:
859 return AVERROR(EINVAL);
860 }
861
862 if (ret >= sizeof(buf))
863 return AVERROR(EINVAL);
864 *out_val = av_strdup(buf);
865 return *out_val ? 0 : AVERROR(ENOMEM);
866 }
867
get_number(void * obj,const char * name,const AVOption ** o_out,double * num,int * den,int64_t * intnum,int search_flags)868 static int get_number(void *obj, const char *name, const AVOption **o_out, double *num, int *den, int64_t *intnum,
869 int search_flags)
870 {
871 void *dst, *target_obj;
872 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
873 if (!o || !target_obj)
874 goto error;
875
876 dst = ((uint8_t *)target_obj) + o->offset;
877
878 if (o_out) *o_out= o;
879
880 return read_number(o, dst, num, den, intnum);
881
882 error:
883 *den =
884 *intnum = 0;
885 return -1;
886 }
887
av_opt_get_int(void * obj,const char * name,int search_flags,int64_t * out_val)888 int av_opt_get_int(void *obj, const char *name, int search_flags, int64_t *out_val)
889 {
890 int64_t intnum = 1;
891 double num = 1;
892 int ret, den = 1;
893
894 if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0)
895 return ret;
896 *out_val = num * intnum / den;
897 return 0;
898 }
899
av_opt_get_double(void * obj,const char * name,int search_flags,double * out_val)900 int av_opt_get_double(void *obj, const char *name, int search_flags, double *out_val)
901 {
902 int64_t intnum = 1;
903 double num = 1;
904 int ret, den = 1;
905
906 if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0)
907 return ret;
908 *out_val = num * intnum / den;
909 return 0;
910 }
911
av_opt_get_q(void * obj,const char * name,int search_flags,AVRational * out_val)912 int av_opt_get_q(void *obj, const char *name, int search_flags, AVRational *out_val)
913 {
914 int64_t intnum = 1;
915 double num = 1;
916 int ret, den = 1;
917
918 if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0)
919 return ret;
920
921 if (num == 1.0 && (int)intnum == intnum)
922 *out_val = (AVRational){intnum, den};
923 else
924 *out_val = av_d2q(num*intnum/den, 1<<24);
925 return 0;
926 }
927
av_opt_get_image_size(void * obj,const char * name,int search_flags,int * w_out,int * h_out)928 int av_opt_get_image_size(void *obj, const char *name, int search_flags, int *w_out, int *h_out)
929 {
930 void *dst, *target_obj;
931 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
932 if (!o || !target_obj)
933 return AVERROR_OPTION_NOT_FOUND;
934 if (o->type != AV_OPT_TYPE_IMAGE_SIZE) {
935 av_log(obj, AV_LOG_ERROR,
936 "The value for option '%s' is not an image size.\n", name);
937 return AVERROR(EINVAL);
938 }
939
940 dst = ((uint8_t*)target_obj) + o->offset;
941 if (w_out) *w_out = *(int *)dst;
942 if (h_out) *h_out = *((int *)dst+1);
943 return 0;
944 }
945
av_opt_get_video_rate(void * obj,const char * name,int search_flags,AVRational * out_val)946 int av_opt_get_video_rate(void *obj, const char *name, int search_flags, AVRational *out_val)
947 {
948 int64_t intnum = 1;
949 double num = 1;
950 int ret, den = 1;
951
952 if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0)
953 return ret;
954
955 if (num == 1.0 && (int)intnum == intnum)
956 *out_val = (AVRational) { intnum, den };
957 else
958 *out_val = av_d2q(num * intnum / den, 1 << 24);
959 return 0;
960 }
961
get_format(void * obj,const char * name,int search_flags,int * out_fmt,enum AVOptionType type,const char * desc)962 static int get_format(void *obj, const char *name, int search_flags, int *out_fmt,
963 enum AVOptionType type, const char *desc)
964 {
965 void *dst, *target_obj;
966 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
967 if (!o || !target_obj)
968 return AVERROR_OPTION_NOT_FOUND;
969 if (o->type != type) {
970 av_log(obj, AV_LOG_ERROR,
971 "The value for option '%s' is not a %s format.\n", desc, name);
972 return AVERROR(EINVAL);
973 }
974
975 dst = ((uint8_t*)target_obj) + o->offset;
976 *out_fmt = *(int *)dst;
977 return 0;
978 }
979
av_opt_get_pixel_fmt(void * obj,const char * name,int search_flags,enum AVPixelFormat * out_fmt)980 int av_opt_get_pixel_fmt(void *obj, const char *name, int search_flags, enum AVPixelFormat *out_fmt)
981 {
982 return get_format(obj, name, search_flags, out_fmt, AV_OPT_TYPE_PIXEL_FMT, "pixel");
983 }
984
av_opt_get_sample_fmt(void * obj,const char * name,int search_flags,enum AVSampleFormat * out_fmt)985 int av_opt_get_sample_fmt(void *obj, const char *name, int search_flags, enum AVSampleFormat *out_fmt)
986 {
987 return get_format(obj, name, search_flags, out_fmt, AV_OPT_TYPE_SAMPLE_FMT, "sample");
988 }
989
av_opt_get_channel_layout(void * obj,const char * name,int search_flags,int64_t * cl)990 int av_opt_get_channel_layout(void *obj, const char *name, int search_flags, int64_t *cl)
991 {
992 void *dst, *target_obj;
993 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
994 if (!o || !target_obj)
995 return AVERROR_OPTION_NOT_FOUND;
996 if (o->type != AV_OPT_TYPE_CHANNEL_LAYOUT) {
997 av_log(obj, AV_LOG_ERROR,
998 "The value for option '%s' is not a channel layout.\n", name);
999 return AVERROR(EINVAL);
1000 }
1001
1002 dst = ((uint8_t*)target_obj) + o->offset;
1003 *cl = *(int64_t *)dst;
1004 return 0;
1005 }
1006
av_opt_get_dict_val(void * obj,const char * name,int search_flags,AVDictionary ** out_val)1007 int av_opt_get_dict_val(void *obj, const char *name, int search_flags, AVDictionary **out_val)
1008 {
1009 void *target_obj;
1010 AVDictionary *src;
1011 const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
1012
1013 if (!o || !target_obj)
1014 return AVERROR_OPTION_NOT_FOUND;
1015 if (o->type != AV_OPT_TYPE_DICT)
1016 return AVERROR(EINVAL);
1017
1018 src = *(AVDictionary **)(((uint8_t *)target_obj) + o->offset);
1019 av_dict_copy(out_val, src, 0);
1020
1021 return 0;
1022 }
1023
av_opt_flag_is_set(void * obj,const char * field_name,const char * flag_name)1024 int av_opt_flag_is_set(void *obj, const char *field_name, const char *flag_name)
1025 {
1026 const AVOption *field = av_opt_find(obj, field_name, NULL, 0, 0);
1027 const AVOption *flag = av_opt_find(obj, flag_name,
1028 field ? field->unit : NULL, 0, 0);
1029 int64_t res;
1030
1031 if (!field || !flag || flag->type != AV_OPT_TYPE_CONST ||
1032 av_opt_get_int(obj, field_name, 0, &res) < 0)
1033 return 0;
1034 return res & flag->default_val.i64;
1035 }
1036
log_value(void * av_log_obj,int level,double d)1037 static void log_value(void *av_log_obj, int level, double d)
1038 {
1039 if (d == INT_MAX) {
1040 av_log(av_log_obj, level, "INT_MAX");
1041 } else if (d == INT_MIN) {
1042 av_log(av_log_obj, level, "INT_MIN");
1043 } else if (d == UINT32_MAX) {
1044 av_log(av_log_obj, level, "UINT32_MAX");
1045 } else if (d == (double)INT64_MAX) {
1046 av_log(av_log_obj, level, "I64_MAX");
1047 } else if (d == INT64_MIN) {
1048 av_log(av_log_obj, level, "I64_MIN");
1049 } else if (d == FLT_MAX) {
1050 av_log(av_log_obj, level, "FLT_MAX");
1051 } else if (d == FLT_MIN) {
1052 av_log(av_log_obj, level, "FLT_MIN");
1053 } else if (d == -FLT_MAX) {
1054 av_log(av_log_obj, level, "-FLT_MAX");
1055 } else if (d == -FLT_MIN) {
1056 av_log(av_log_obj, level, "-FLT_MIN");
1057 } else if (d == DBL_MAX) {
1058 av_log(av_log_obj, level, "DBL_MAX");
1059 } else if (d == DBL_MIN) {
1060 av_log(av_log_obj, level, "DBL_MIN");
1061 } else if (d == -DBL_MAX) {
1062 av_log(av_log_obj, level, "-DBL_MAX");
1063 } else if (d == -DBL_MIN) {
1064 av_log(av_log_obj, level, "-DBL_MIN");
1065 } else {
1066 av_log(av_log_obj, level, "%g", d);
1067 }
1068 }
1069
get_opt_const_name(void * obj,const char * unit,int64_t value)1070 static const char *get_opt_const_name(void *obj, const char *unit, int64_t value)
1071 {
1072 const AVOption *opt = NULL;
1073
1074 if (!unit)
1075 return NULL;
1076 while ((opt = av_opt_next(obj, opt)))
1077 if (opt->type == AV_OPT_TYPE_CONST && !strcmp(opt->unit, unit) &&
1078 opt->default_val.i64 == value)
1079 return opt->name;
1080 return NULL;
1081 }
1082
get_opt_flags_string(void * obj,const char * unit,int64_t value)1083 static char *get_opt_flags_string(void *obj, const char *unit, int64_t value)
1084 {
1085 const AVOption *opt = NULL;
1086 char flags[512];
1087
1088 flags[0] = 0;
1089 if (!unit)
1090 return NULL;
1091 while ((opt = av_opt_next(obj, opt))) {
1092 if (opt->type == AV_OPT_TYPE_CONST && !strcmp(opt->unit, unit) &&
1093 opt->default_val.i64 & value) {
1094 if (flags[0])
1095 av_strlcatf(flags, sizeof(flags), "+");
1096 av_strlcatf(flags, sizeof(flags), "%s", opt->name);
1097 }
1098 }
1099 if (flags[0])
1100 return av_strdup(flags);
1101 return NULL;
1102 }
1103
opt_list(void * obj,void * av_log_obj,const char * unit,int req_flags,int rej_flags)1104 static void opt_list(void *obj, void *av_log_obj, const char *unit,
1105 int req_flags, int rej_flags)
1106 {
1107 const AVOption *opt = NULL;
1108 AVOptionRanges *r;
1109 int i;
1110
1111 while ((opt = av_opt_next(obj, opt))) {
1112 if (!(opt->flags & req_flags) || (opt->flags & rej_flags))
1113 continue;
1114
1115 /* Don't print CONST's on level one.
1116 * Don't print anything but CONST's on level two.
1117 * Only print items from the requested unit.
1118 */
1119 if (!unit && opt->type == AV_OPT_TYPE_CONST)
1120 continue;
1121 else if (unit && opt->type != AV_OPT_TYPE_CONST)
1122 continue;
1123 else if (unit && opt->type == AV_OPT_TYPE_CONST && strcmp(unit, opt->unit))
1124 continue;
1125 else if (unit && opt->type == AV_OPT_TYPE_CONST)
1126 av_log(av_log_obj, AV_LOG_INFO, " %-15s ", opt->name);
1127 else
1128 av_log(av_log_obj, AV_LOG_INFO, " %s%-17s ",
1129 (opt->flags & AV_OPT_FLAG_FILTERING_PARAM) ? "" : "-",
1130 opt->name);
1131
1132 switch (opt->type) {
1133 case AV_OPT_TYPE_FLAGS:
1134 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<flags>");
1135 break;
1136 case AV_OPT_TYPE_INT:
1137 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<int>");
1138 break;
1139 case AV_OPT_TYPE_INT64:
1140 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<int64>");
1141 break;
1142 case AV_OPT_TYPE_UINT64:
1143 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<uint64>");
1144 break;
1145 case AV_OPT_TYPE_DOUBLE:
1146 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<double>");
1147 break;
1148 case AV_OPT_TYPE_FLOAT:
1149 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<float>");
1150 break;
1151 case AV_OPT_TYPE_STRING:
1152 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<string>");
1153 break;
1154 case AV_OPT_TYPE_RATIONAL:
1155 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<rational>");
1156 break;
1157 case AV_OPT_TYPE_BINARY:
1158 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<binary>");
1159 break;
1160 case AV_OPT_TYPE_IMAGE_SIZE:
1161 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<image_size>");
1162 break;
1163 case AV_OPT_TYPE_VIDEO_RATE:
1164 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<video_rate>");
1165 break;
1166 case AV_OPT_TYPE_PIXEL_FMT:
1167 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<pix_fmt>");
1168 break;
1169 case AV_OPT_TYPE_SAMPLE_FMT:
1170 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<sample_fmt>");
1171 break;
1172 case AV_OPT_TYPE_DURATION:
1173 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<duration>");
1174 break;
1175 case AV_OPT_TYPE_COLOR:
1176 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<color>");
1177 break;
1178 case AV_OPT_TYPE_CHANNEL_LAYOUT:
1179 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<channel_layout>");
1180 break;
1181 case AV_OPT_TYPE_BOOL:
1182 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<boolean>");
1183 break;
1184 case AV_OPT_TYPE_CONST:
1185 default:
1186 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "");
1187 break;
1188 }
1189 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_ENCODING_PARAM) ? 'E' : '.');
1190 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_DECODING_PARAM) ? 'D' : '.');
1191 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_FILTERING_PARAM)? 'F' : '.');
1192 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_VIDEO_PARAM ) ? 'V' : '.');
1193 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_AUDIO_PARAM ) ? 'A' : '.');
1194 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_SUBTITLE_PARAM) ? 'S' : '.');
1195 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_EXPORT) ? 'X' : '.');
1196 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_READONLY) ? 'R' : '.');
1197 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_BSF_PARAM) ? 'B' : '.');
1198
1199 if (opt->help)
1200 av_log(av_log_obj, AV_LOG_INFO, " %s", opt->help);
1201
1202 if (av_opt_query_ranges(&r, obj, opt->name, AV_OPT_SEARCH_FAKE_OBJ) >= 0) {
1203 switch (opt->type) {
1204 case AV_OPT_TYPE_INT:
1205 case AV_OPT_TYPE_INT64:
1206 case AV_OPT_TYPE_UINT64:
1207 case AV_OPT_TYPE_DOUBLE:
1208 case AV_OPT_TYPE_FLOAT:
1209 case AV_OPT_TYPE_RATIONAL:
1210 for (i = 0; i < r->nb_ranges; i++) {
1211 av_log(av_log_obj, AV_LOG_INFO, " (from ");
1212 log_value(av_log_obj, AV_LOG_INFO, r->range[i]->value_min);
1213 av_log(av_log_obj, AV_LOG_INFO, " to ");
1214 log_value(av_log_obj, AV_LOG_INFO, r->range[i]->value_max);
1215 av_log(av_log_obj, AV_LOG_INFO, ")");
1216 }
1217 break;
1218 }
1219 av_opt_freep_ranges(&r);
1220 }
1221
1222 if (opt->type != AV_OPT_TYPE_CONST &&
1223 opt->type != AV_OPT_TYPE_BINARY &&
1224 !((opt->type == AV_OPT_TYPE_COLOR ||
1225 opt->type == AV_OPT_TYPE_IMAGE_SIZE ||
1226 opt->type == AV_OPT_TYPE_STRING ||
1227 opt->type == AV_OPT_TYPE_VIDEO_RATE) &&
1228 !opt->default_val.str)) {
1229 av_log(av_log_obj, AV_LOG_INFO, " (default ");
1230 switch (opt->type) {
1231 case AV_OPT_TYPE_BOOL:
1232 av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(get_bool_name(opt->default_val.i64), "invalid"));
1233 break;
1234 case AV_OPT_TYPE_FLAGS: {
1235 char *def_flags = get_opt_flags_string(obj, opt->unit, opt->default_val.i64);
1236 if (def_flags) {
1237 av_log(av_log_obj, AV_LOG_INFO, "%s", def_flags);
1238 av_freep(&def_flags);
1239 } else {
1240 av_log(av_log_obj, AV_LOG_INFO, "%"PRIX64, opt->default_val.i64);
1241 }
1242 break;
1243 }
1244 case AV_OPT_TYPE_DURATION: {
1245 char buf[25];
1246 format_duration(buf, sizeof(buf), opt->default_val.i64);
1247 av_log(av_log_obj, AV_LOG_INFO, "%s", buf);
1248 break;
1249 }
1250 case AV_OPT_TYPE_INT:
1251 case AV_OPT_TYPE_UINT64:
1252 case AV_OPT_TYPE_INT64: {
1253 const char *def_const = get_opt_const_name(obj, opt->unit, opt->default_val.i64);
1254 if (def_const)
1255 av_log(av_log_obj, AV_LOG_INFO, "%s", def_const);
1256 else
1257 log_value(av_log_obj, AV_LOG_INFO, opt->default_val.i64);
1258 break;
1259 }
1260 case AV_OPT_TYPE_DOUBLE:
1261 case AV_OPT_TYPE_FLOAT:
1262 log_value(av_log_obj, AV_LOG_INFO, opt->default_val.dbl);
1263 break;
1264 case AV_OPT_TYPE_RATIONAL: {
1265 AVRational q = av_d2q(opt->default_val.dbl, INT_MAX);
1266 av_log(av_log_obj, AV_LOG_INFO, "%d/%d", q.num, q.den); }
1267 break;
1268 case AV_OPT_TYPE_PIXEL_FMT:
1269 av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(av_get_pix_fmt_name(opt->default_val.i64), "none"));
1270 break;
1271 case AV_OPT_TYPE_SAMPLE_FMT:
1272 av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(av_get_sample_fmt_name(opt->default_val.i64), "none"));
1273 break;
1274 case AV_OPT_TYPE_COLOR:
1275 case AV_OPT_TYPE_IMAGE_SIZE:
1276 case AV_OPT_TYPE_STRING:
1277 case AV_OPT_TYPE_VIDEO_RATE:
1278 av_log(av_log_obj, AV_LOG_INFO, "\"%s\"", opt->default_val.str);
1279 break;
1280 case AV_OPT_TYPE_CHANNEL_LAYOUT:
1281 av_log(av_log_obj, AV_LOG_INFO, "0x%"PRIx64, opt->default_val.i64);
1282 break;
1283 }
1284 av_log(av_log_obj, AV_LOG_INFO, ")");
1285 }
1286
1287 av_log(av_log_obj, AV_LOG_INFO, "\n");
1288 if (opt->unit && opt->type != AV_OPT_TYPE_CONST)
1289 opt_list(obj, av_log_obj, opt->unit, req_flags, rej_flags);
1290 }
1291 }
1292
av_opt_show2(void * obj,void * av_log_obj,int req_flags,int rej_flags)1293 int av_opt_show2(void *obj, void *av_log_obj, int req_flags, int rej_flags)
1294 {
1295 if (!obj)
1296 return -1;
1297
1298 av_log(av_log_obj, AV_LOG_INFO, "%s AVOptions:\n", (*(AVClass **)obj)->class_name);
1299
1300 opt_list(obj, av_log_obj, NULL, req_flags, rej_flags);
1301
1302 return 0;
1303 }
1304
av_opt_set_defaults(void * s)1305 void av_opt_set_defaults(void *s)
1306 {
1307 av_opt_set_defaults2(s, 0, 0);
1308 }
1309
av_opt_set_defaults2(void * s,int mask,int flags)1310 void av_opt_set_defaults2(void *s, int mask, int flags)
1311 {
1312 const AVOption *opt = NULL;
1313 while ((opt = av_opt_next(s, opt))) {
1314 void *dst = ((uint8_t*)s) + opt->offset;
1315
1316 if ((opt->flags & mask) != flags)
1317 continue;
1318
1319 if (opt->flags & AV_OPT_FLAG_READONLY)
1320 continue;
1321
1322 switch (opt->type) {
1323 case AV_OPT_TYPE_CONST:
1324 /* Nothing to be done here */
1325 break;
1326 case AV_OPT_TYPE_BOOL:
1327 case AV_OPT_TYPE_FLAGS:
1328 case AV_OPT_TYPE_INT:
1329 case AV_OPT_TYPE_INT64:
1330 case AV_OPT_TYPE_UINT64:
1331 case AV_OPT_TYPE_DURATION:
1332 case AV_OPT_TYPE_CHANNEL_LAYOUT:
1333 case AV_OPT_TYPE_PIXEL_FMT:
1334 case AV_OPT_TYPE_SAMPLE_FMT:
1335 write_number(s, opt, dst, 1, 1, opt->default_val.i64);
1336 break;
1337 case AV_OPT_TYPE_DOUBLE:
1338 case AV_OPT_TYPE_FLOAT: {
1339 double val;
1340 val = opt->default_val.dbl;
1341 write_number(s, opt, dst, val, 1, 1);
1342 }
1343 break;
1344 case AV_OPT_TYPE_RATIONAL: {
1345 AVRational val;
1346 val = av_d2q(opt->default_val.dbl, INT_MAX);
1347 write_number(s, opt, dst, 1, val.den, val.num);
1348 }
1349 break;
1350 case AV_OPT_TYPE_COLOR:
1351 set_string_color(s, opt, opt->default_val.str, dst);
1352 break;
1353 case AV_OPT_TYPE_STRING:
1354 set_string(s, opt, opt->default_val.str, dst);
1355 break;
1356 case AV_OPT_TYPE_IMAGE_SIZE:
1357 set_string_image_size(s, opt, opt->default_val.str, dst);
1358 break;
1359 case AV_OPT_TYPE_VIDEO_RATE:
1360 set_string_video_rate(s, opt, opt->default_val.str, dst);
1361 break;
1362 case AV_OPT_TYPE_BINARY:
1363 set_string_binary(s, opt, opt->default_val.str, dst);
1364 break;
1365 case AV_OPT_TYPE_DICT:
1366 /* Cannot set defaults for these types */
1367 break;
1368 default:
1369 av_log(s, AV_LOG_DEBUG, "AVOption type %d of option %s not implemented yet\n",
1370 opt->type, opt->name);
1371 }
1372 }
1373 }
1374
1375 /**
1376 * Store the value in the field in ctx that is named like key.
1377 * ctx must be an AVClass context, storing is done using AVOptions.
1378 *
1379 * @param buf the string to parse, buf will be updated to point at the
1380 * separator just after the parsed key/value pair
1381 * @param key_val_sep a 0-terminated list of characters used to
1382 * separate key from value
1383 * @param pairs_sep a 0-terminated list of characters used to separate
1384 * two pairs from each other
1385 * @return 0 if the key/value pair has been successfully parsed and
1386 * set, or a negative value corresponding to an AVERROR code in case
1387 * of error:
1388 * AVERROR(EINVAL) if the key/value pair cannot be parsed,
1389 * the error code issued by av_opt_set() if the key/value pair
1390 * cannot be set
1391 */
parse_key_value_pair(void * ctx,const char ** buf,const char * key_val_sep,const char * pairs_sep)1392 static int parse_key_value_pair(void *ctx, const char **buf,
1393 const char *key_val_sep, const char *pairs_sep)
1394 {
1395 char *key = av_get_token(buf, key_val_sep);
1396 char *val;
1397 int ret;
1398
1399 if (!key)
1400 return AVERROR(ENOMEM);
1401
1402 if (*key && strspn(*buf, key_val_sep)) {
1403 (*buf)++;
1404 val = av_get_token(buf, pairs_sep);
1405 if (!val) {
1406 av_freep(&key);
1407 return AVERROR(ENOMEM);
1408 }
1409 } else {
1410 av_log(ctx, AV_LOG_ERROR, "Missing key or no key/value separator found after key '%s'\n", key);
1411 av_free(key);
1412 return AVERROR(EINVAL);
1413 }
1414
1415 av_log(ctx, AV_LOG_DEBUG, "Setting entry with key '%s' to value '%s'\n", key, val);
1416
1417 ret = av_opt_set(ctx, key, val, AV_OPT_SEARCH_CHILDREN);
1418 if (ret == AVERROR_OPTION_NOT_FOUND)
1419 av_log(ctx, AV_LOG_ERROR, "Key '%s' not found.\n", key);
1420
1421 av_free(key);
1422 av_free(val);
1423 return ret;
1424 }
1425
av_set_options_string(void * ctx,const char * opts,const char * key_val_sep,const char * pairs_sep)1426 int av_set_options_string(void *ctx, const char *opts,
1427 const char *key_val_sep, const char *pairs_sep)
1428 {
1429 int ret, count = 0;
1430
1431 if (!opts)
1432 return 0;
1433
1434 while (*opts) {
1435 if ((ret = parse_key_value_pair(ctx, &opts, key_val_sep, pairs_sep)) < 0)
1436 return ret;
1437 count++;
1438
1439 if (*opts)
1440 opts++;
1441 }
1442
1443 return count;
1444 }
1445
1446 #define WHITESPACES " \n\t\r"
1447
is_key_char(char c)1448 static int is_key_char(char c)
1449 {
1450 return (unsigned)((c | 32) - 'a') < 26 ||
1451 (unsigned)(c - '0') < 10 ||
1452 c == '-' || c == '_' || c == '/' || c == '.';
1453 }
1454
1455 /**
1456 * Read a key from a string.
1457 *
1458 * The key consists of is_key_char characters and must be terminated by a
1459 * character from the delim string; spaces are ignored.
1460 *
1461 * @return 0 for success (even with ellipsis), <0 for failure
1462 */
get_key(const char ** ropts,const char * delim,char ** rkey)1463 static int get_key(const char **ropts, const char *delim, char **rkey)
1464 {
1465 const char *opts = *ropts;
1466 const char *key_start, *key_end;
1467
1468 key_start = opts += strspn(opts, WHITESPACES);
1469 while (is_key_char(*opts))
1470 opts++;
1471 key_end = opts;
1472 opts += strspn(opts, WHITESPACES);
1473 if (!*opts || !strchr(delim, *opts))
1474 return AVERROR(EINVAL);
1475 opts++;
1476 if (!(*rkey = av_malloc(key_end - key_start + 1)))
1477 return AVERROR(ENOMEM);
1478 memcpy(*rkey, key_start, key_end - key_start);
1479 (*rkey)[key_end - key_start] = 0;
1480 *ropts = opts;
1481 return 0;
1482 }
1483
av_opt_get_key_value(const char ** ropts,const char * key_val_sep,const char * pairs_sep,unsigned flags,char ** rkey,char ** rval)1484 int av_opt_get_key_value(const char **ropts,
1485 const char *key_val_sep, const char *pairs_sep,
1486 unsigned flags,
1487 char **rkey, char **rval)
1488 {
1489 int ret;
1490 char *key = NULL, *val;
1491 const char *opts = *ropts;
1492
1493 if ((ret = get_key(&opts, key_val_sep, &key)) < 0 &&
1494 !(flags & AV_OPT_FLAG_IMPLICIT_KEY))
1495 return AVERROR(EINVAL);
1496 if (!(val = av_get_token(&opts, pairs_sep))) {
1497 av_free(key);
1498 return AVERROR(ENOMEM);
1499 }
1500 *ropts = opts;
1501 *rkey = key;
1502 *rval = val;
1503 return 0;
1504 }
1505
av_opt_set_from_string(void * ctx,const char * opts,const char * const * shorthand,const char * key_val_sep,const char * pairs_sep)1506 int av_opt_set_from_string(void *ctx, const char *opts,
1507 const char *const *shorthand,
1508 const char *key_val_sep, const char *pairs_sep)
1509 {
1510 int ret, count = 0;
1511 const char *dummy_shorthand = NULL;
1512 char *av_uninit(parsed_key), *av_uninit(value);
1513 const char *key;
1514
1515 if (!opts)
1516 return 0;
1517 if (!shorthand)
1518 shorthand = &dummy_shorthand;
1519
1520 while (*opts) {
1521 ret = av_opt_get_key_value(&opts, key_val_sep, pairs_sep,
1522 *shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,
1523 &parsed_key, &value);
1524 if (ret < 0) {
1525 if (ret == AVERROR(EINVAL))
1526 av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", opts);
1527 else
1528 av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", opts,
1529 av_err2str(ret));
1530 return ret;
1531 }
1532 if (*opts)
1533 opts++;
1534 if (parsed_key) {
1535 key = parsed_key;
1536 while (*shorthand) /* discard all remaining shorthand */
1537 shorthand++;
1538 } else {
1539 key = *(shorthand++);
1540 }
1541
1542 av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);
1543 if ((ret = av_opt_set(ctx, key, value, 0)) < 0) {
1544 if (ret == AVERROR_OPTION_NOT_FOUND)
1545 av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);
1546 av_free(value);
1547 av_free(parsed_key);
1548 return ret;
1549 }
1550
1551 av_free(value);
1552 av_free(parsed_key);
1553 count++;
1554 }
1555 return count;
1556 }
1557
av_opt_free(void * obj)1558 void av_opt_free(void *obj)
1559 {
1560 const AVOption *o = NULL;
1561 while ((o = av_opt_next(obj, o))) {
1562 switch (o->type) {
1563 case AV_OPT_TYPE_STRING:
1564 case AV_OPT_TYPE_BINARY:
1565 av_freep((uint8_t *)obj + o->offset);
1566 break;
1567
1568 case AV_OPT_TYPE_DICT:
1569 av_dict_free((AVDictionary **)(((uint8_t *)obj) + o->offset));
1570 break;
1571
1572 default:
1573 break;
1574 }
1575 }
1576 }
1577
av_opt_set_dict2(void * obj,AVDictionary ** options,int search_flags)1578 int av_opt_set_dict2(void *obj, AVDictionary **options, int search_flags)
1579 {
1580 AVDictionaryEntry *t = NULL;
1581 AVDictionary *tmp = NULL;
1582 int ret = 0;
1583
1584 if (!options)
1585 return 0;
1586
1587 while ((t = av_dict_get(*options, "", t, AV_DICT_IGNORE_SUFFIX))) {
1588 ret = av_opt_set(obj, t->key, t->value, search_flags);
1589 if (ret == AVERROR_OPTION_NOT_FOUND)
1590 ret = av_dict_set(&tmp, t->key, t->value, 0);
1591 if (ret < 0) {
1592 av_log(obj, AV_LOG_ERROR, "Error setting option %s to value %s.\n", t->key, t->value);
1593 av_dict_free(&tmp);
1594 return ret;
1595 }
1596 ret = 0;
1597 }
1598 av_dict_free(options);
1599 *options = tmp;
1600 return ret;
1601 }
1602
av_opt_set_dict(void * obj,AVDictionary ** options)1603 int av_opt_set_dict(void *obj, AVDictionary **options)
1604 {
1605 return av_opt_set_dict2(obj, options, 0);
1606 }
1607
av_opt_find(void * obj,const char * name,const char * unit,int opt_flags,int search_flags)1608 const AVOption *av_opt_find(void *obj, const char *name, const char *unit,
1609 int opt_flags, int search_flags)
1610 {
1611 return av_opt_find2(obj, name, unit, opt_flags, search_flags, NULL);
1612 }
1613
av_opt_find2(void * obj,const char * name,const char * unit,int opt_flags,int search_flags,void ** target_obj)1614 const AVOption *av_opt_find2(void *obj, const char *name, const char *unit,
1615 int opt_flags, int search_flags, void **target_obj)
1616 {
1617 const AVClass *c;
1618 const AVOption *o = NULL;
1619
1620 if(!obj)
1621 return NULL;
1622
1623 c= *(AVClass**)obj;
1624
1625 if (!c)
1626 return NULL;
1627
1628 if (search_flags & AV_OPT_SEARCH_CHILDREN) {
1629 if (search_flags & AV_OPT_SEARCH_FAKE_OBJ) {
1630 const AVClass *child = NULL;
1631 while (child = av_opt_child_class_next(c, child))
1632 if (o = av_opt_find2(&child, name, unit, opt_flags, search_flags, NULL))
1633 return o;
1634 } else {
1635 void *child = NULL;
1636 while (child = av_opt_child_next(obj, child))
1637 if (o = av_opt_find2(child, name, unit, opt_flags, search_flags, target_obj))
1638 return o;
1639 }
1640 }
1641
1642 while (o = av_opt_next(obj, o)) {
1643 if (!strcmp(o->name, name) && (o->flags & opt_flags) == opt_flags &&
1644 ((!unit && o->type != AV_OPT_TYPE_CONST) ||
1645 (unit && o->type == AV_OPT_TYPE_CONST && o->unit && !strcmp(o->unit, unit)))) {
1646 if (target_obj) {
1647 if (!(search_flags & AV_OPT_SEARCH_FAKE_OBJ))
1648 *target_obj = obj;
1649 else
1650 *target_obj = NULL;
1651 }
1652 return o;
1653 }
1654 }
1655 return NULL;
1656 }
1657
av_opt_child_next(void * obj,void * prev)1658 void *av_opt_child_next(void *obj, void *prev)
1659 {
1660 const AVClass *c = *(AVClass **)obj;
1661 if (c->child_next)
1662 return c->child_next(obj, prev);
1663 return NULL;
1664 }
1665
av_opt_child_class_next(const AVClass * parent,const AVClass * prev)1666 const AVClass *av_opt_child_class_next(const AVClass *parent, const AVClass *prev)
1667 {
1668 if (parent->child_class_next)
1669 return parent->child_class_next(prev);
1670 return NULL;
1671 }
1672
av_opt_ptr(const AVClass * class,void * obj,const char * name)1673 void *av_opt_ptr(const AVClass *class, void *obj, const char *name)
1674 {
1675 const AVOption *opt= av_opt_find2(&class, name, NULL, 0, AV_OPT_SEARCH_FAKE_OBJ, NULL);
1676 if(!opt)
1677 return NULL;
1678 return (uint8_t*)obj + opt->offset;
1679 }
1680
opt_size(enum AVOptionType type)1681 static int opt_size(enum AVOptionType type)
1682 {
1683 switch(type) {
1684 case AV_OPT_TYPE_BOOL:
1685 case AV_OPT_TYPE_INT:
1686 case AV_OPT_TYPE_FLAGS:
1687 return sizeof(int);
1688 case AV_OPT_TYPE_DURATION:
1689 case AV_OPT_TYPE_CHANNEL_LAYOUT:
1690 case AV_OPT_TYPE_INT64:
1691 case AV_OPT_TYPE_UINT64:
1692 return sizeof(int64_t);
1693 case AV_OPT_TYPE_DOUBLE:
1694 return sizeof(double);
1695 case AV_OPT_TYPE_FLOAT:
1696 return sizeof(float);
1697 case AV_OPT_TYPE_STRING:
1698 return sizeof(uint8_t*);
1699 case AV_OPT_TYPE_VIDEO_RATE:
1700 case AV_OPT_TYPE_RATIONAL:
1701 return sizeof(AVRational);
1702 case AV_OPT_TYPE_BINARY:
1703 return sizeof(uint8_t*) + sizeof(int);
1704 case AV_OPT_TYPE_IMAGE_SIZE:
1705 return sizeof(int[2]);
1706 case AV_OPT_TYPE_PIXEL_FMT:
1707 return sizeof(enum AVPixelFormat);
1708 case AV_OPT_TYPE_SAMPLE_FMT:
1709 return sizeof(enum AVSampleFormat);
1710 case AV_OPT_TYPE_COLOR:
1711 return 4;
1712 }
1713 return AVERROR(EINVAL);
1714 }
1715
av_opt_copy(void * dst,const void * src)1716 int av_opt_copy(void *dst, const void *src)
1717 {
1718 const AVOption *o = NULL;
1719 const AVClass *c;
1720 int ret = 0;
1721
1722 if (!src)
1723 return AVERROR(EINVAL);
1724
1725 c = *(AVClass **)src;
1726 if (!c || c != *(AVClass **)dst)
1727 return AVERROR(EINVAL);
1728
1729 while ((o = av_opt_next(src, o))) {
1730 void *field_dst = (uint8_t *)dst + o->offset;
1731 void *field_src = (uint8_t *)src + o->offset;
1732 uint8_t **field_dst8 = (uint8_t **)field_dst;
1733 uint8_t **field_src8 = (uint8_t **)field_src;
1734
1735 if (o->type == AV_OPT_TYPE_STRING) {
1736 if (*field_dst8 != *field_src8)
1737 av_freep(field_dst8);
1738 *field_dst8 = av_strdup(*field_src8);
1739 if (*field_src8 && !*field_dst8)
1740 ret = AVERROR(ENOMEM);
1741 } else if (o->type == AV_OPT_TYPE_BINARY) {
1742 int len = *(int *)(field_src8 + 1);
1743 if (*field_dst8 != *field_src8)
1744 av_freep(field_dst8);
1745 *field_dst8 = av_memdup(*field_src8, len);
1746 if (len && !*field_dst8) {
1747 ret = AVERROR(ENOMEM);
1748 len = 0;
1749 }
1750 *(int *)(field_dst8 + 1) = len;
1751 } else if (o->type == AV_OPT_TYPE_CONST) {
1752 // do nothing
1753 } else if (o->type == AV_OPT_TYPE_DICT) {
1754 AVDictionary **sdict = (AVDictionary **) field_src;
1755 AVDictionary **ddict = (AVDictionary **) field_dst;
1756 if (*sdict != *ddict)
1757 av_dict_free(ddict);
1758 *ddict = NULL;
1759 av_dict_copy(ddict, *sdict, 0);
1760 if (av_dict_count(*sdict) != av_dict_count(*ddict))
1761 ret = AVERROR(ENOMEM);
1762 } else {
1763 int size = opt_size(o->type);
1764 if (size < 0)
1765 ret = size;
1766 else
1767 memcpy(field_dst, field_src, size);
1768 }
1769 }
1770 return ret;
1771 }
1772
av_opt_query_ranges(AVOptionRanges ** ranges_arg,void * obj,const char * key,int flags)1773 int av_opt_query_ranges(AVOptionRanges **ranges_arg, void *obj, const char *key, int flags)
1774 {
1775 int ret;
1776 const AVClass *c = *(AVClass**)obj;
1777 int (*callback)(AVOptionRanges **, void *obj, const char *key, int flags) = NULL;
1778
1779 if (c->version > (52 << 16 | 11 << 8))
1780 callback = c->query_ranges;
1781
1782 if (!callback)
1783 callback = av_opt_query_ranges_default;
1784
1785 ret = callback(ranges_arg, obj, key, flags);
1786 if (ret >= 0) {
1787 if (!(flags & AV_OPT_MULTI_COMPONENT_RANGE))
1788 ret = 1;
1789 (*ranges_arg)->nb_components = ret;
1790 }
1791 return ret;
1792 }
1793
av_opt_query_ranges_default(AVOptionRanges ** ranges_arg,void * obj,const char * key,int flags)1794 int av_opt_query_ranges_default(AVOptionRanges **ranges_arg, void *obj, const char *key, int flags)
1795 {
1796 AVOptionRanges *ranges = av_mallocz(sizeof(*ranges));
1797 AVOptionRange **range_array = av_mallocz(sizeof(void*));
1798 AVOptionRange *range = av_mallocz(sizeof(*range));
1799 const AVOption *field = av_opt_find(obj, key, NULL, 0, flags);
1800 int ret;
1801
1802 *ranges_arg = NULL;
1803
1804 if (!ranges || !range || !range_array || !field) {
1805 ret = AVERROR(ENOMEM);
1806 goto fail;
1807 }
1808
1809 ranges->range = range_array;
1810 ranges->range[0] = range;
1811 ranges->nb_ranges = 1;
1812 ranges->nb_components = 1;
1813 range->is_range = 1;
1814 range->value_min = field->min;
1815 range->value_max = field->max;
1816
1817 switch (field->type) {
1818 case AV_OPT_TYPE_BOOL:
1819 case AV_OPT_TYPE_INT:
1820 case AV_OPT_TYPE_INT64:
1821 case AV_OPT_TYPE_UINT64:
1822 case AV_OPT_TYPE_PIXEL_FMT:
1823 case AV_OPT_TYPE_SAMPLE_FMT:
1824 case AV_OPT_TYPE_FLOAT:
1825 case AV_OPT_TYPE_DOUBLE:
1826 case AV_OPT_TYPE_DURATION:
1827 case AV_OPT_TYPE_COLOR:
1828 case AV_OPT_TYPE_CHANNEL_LAYOUT:
1829 break;
1830 case AV_OPT_TYPE_STRING:
1831 range->component_min = 0;
1832 range->component_max = 0x10FFFF; // max unicode value
1833 range->value_min = -1;
1834 range->value_max = INT_MAX;
1835 break;
1836 case AV_OPT_TYPE_RATIONAL:
1837 range->component_min = INT_MIN;
1838 range->component_max = INT_MAX;
1839 break;
1840 case AV_OPT_TYPE_IMAGE_SIZE:
1841 range->component_min = 0;
1842 range->component_max = INT_MAX/128/8;
1843 range->value_min = 0;
1844 range->value_max = INT_MAX/8;
1845 break;
1846 case AV_OPT_TYPE_VIDEO_RATE:
1847 range->component_min = 1;
1848 range->component_max = INT_MAX;
1849 range->value_min = 1;
1850 range->value_max = INT_MAX;
1851 break;
1852 default:
1853 ret = AVERROR(ENOSYS);
1854 goto fail;
1855 }
1856
1857 *ranges_arg = ranges;
1858 return 1;
1859 fail:
1860 av_free(ranges);
1861 av_free(range);
1862 av_free(range_array);
1863 return ret;
1864 }
1865
av_opt_freep_ranges(AVOptionRanges ** rangesp)1866 void av_opt_freep_ranges(AVOptionRanges **rangesp)
1867 {
1868 int i;
1869 AVOptionRanges *ranges = *rangesp;
1870
1871 if (!ranges)
1872 return;
1873
1874 for (i = 0; i < ranges->nb_ranges * ranges->nb_components; i++) {
1875 AVOptionRange *range = ranges->range[i];
1876 if (range) {
1877 av_freep(&range->str);
1878 av_freep(&ranges->range[i]);
1879 }
1880 }
1881 av_freep(&ranges->range);
1882 av_freep(rangesp);
1883 }
1884
av_opt_is_set_to_default(void * obj,const AVOption * o)1885 int av_opt_is_set_to_default(void *obj, const AVOption *o)
1886 {
1887 int64_t i64;
1888 double d, d2;
1889 float f;
1890 AVRational q;
1891 int ret, w, h;
1892 char *str;
1893 void *dst;
1894
1895 if (!o || !obj)
1896 return AVERROR(EINVAL);
1897
1898 dst = ((uint8_t*)obj) + o->offset;
1899
1900 switch (o->type) {
1901 case AV_OPT_TYPE_CONST:
1902 return 1;
1903 case AV_OPT_TYPE_BOOL:
1904 case AV_OPT_TYPE_FLAGS:
1905 case AV_OPT_TYPE_PIXEL_FMT:
1906 case AV_OPT_TYPE_SAMPLE_FMT:
1907 case AV_OPT_TYPE_INT:
1908 case AV_OPT_TYPE_CHANNEL_LAYOUT:
1909 case AV_OPT_TYPE_DURATION:
1910 case AV_OPT_TYPE_INT64:
1911 case AV_OPT_TYPE_UINT64:
1912 read_number(o, dst, NULL, NULL, &i64);
1913 return o->default_val.i64 == i64;
1914 case AV_OPT_TYPE_STRING:
1915 str = *(char **)dst;
1916 if (str == o->default_val.str) //2 NULLs
1917 return 1;
1918 if (!str || !o->default_val.str) //1 NULL
1919 return 0;
1920 return !strcmp(str, o->default_val.str);
1921 case AV_OPT_TYPE_DOUBLE:
1922 read_number(o, dst, &d, NULL, NULL);
1923 return o->default_val.dbl == d;
1924 case AV_OPT_TYPE_FLOAT:
1925 read_number(o, dst, &d, NULL, NULL);
1926 f = o->default_val.dbl;
1927 d2 = f;
1928 return d2 == d;
1929 case AV_OPT_TYPE_RATIONAL:
1930 q = av_d2q(o->default_val.dbl, INT_MAX);
1931 return !av_cmp_q(*(AVRational*)dst, q);
1932 case AV_OPT_TYPE_BINARY: {
1933 struct {
1934 uint8_t *data;
1935 int size;
1936 } tmp = {0};
1937 int opt_size = *(int *)((void **)dst + 1);
1938 void *opt_ptr = *(void **)dst;
1939 if (!opt_size && (!o->default_val.str || !strlen(o->default_val.str)))
1940 return 1;
1941 if (!opt_size || !o->default_val.str || !strlen(o->default_val.str ))
1942 return 0;
1943 if (opt_size != strlen(o->default_val.str) / 2)
1944 return 0;
1945 ret = set_string_binary(NULL, NULL, o->default_val.str, &tmp.data);
1946 if (!ret)
1947 ret = !memcmp(opt_ptr, tmp.data, tmp.size);
1948 av_free(tmp.data);
1949 return ret;
1950 }
1951 case AV_OPT_TYPE_DICT:
1952 /* Binary and dict have not default support yet. Any pointer is not default. */
1953 return !!(*(void **)dst);
1954 case AV_OPT_TYPE_IMAGE_SIZE:
1955 if (!o->default_val.str || !strcmp(o->default_val.str, "none"))
1956 w = h = 0;
1957 else if ((ret = av_parse_video_size(&w, &h, o->default_val.str)) < 0)
1958 return ret;
1959 return (w == *(int *)dst) && (h == *((int *)dst+1));
1960 case AV_OPT_TYPE_VIDEO_RATE:
1961 q = (AVRational){0, 0};
1962 if (o->default_val.str) {
1963 if ((ret = av_parse_video_rate(&q, o->default_val.str)) < 0)
1964 return ret;
1965 }
1966 return !av_cmp_q(*(AVRational*)dst, q);
1967 case AV_OPT_TYPE_COLOR: {
1968 uint8_t color[4] = {0, 0, 0, 0};
1969 if (o->default_val.str) {
1970 if ((ret = av_parse_color(color, o->default_val.str, -1, NULL)) < 0)
1971 return ret;
1972 }
1973 return !memcmp(color, dst, sizeof(color));
1974 }
1975 default:
1976 av_log(obj, AV_LOG_WARNING, "Not supported option type: %d, option name: %s\n", o->type, o->name);
1977 break;
1978 }
1979 return AVERROR_PATCHWELCOME;
1980 }
1981
av_opt_is_set_to_default_by_name(void * obj,const char * name,int search_flags)1982 int av_opt_is_set_to_default_by_name(void *obj, const char *name, int search_flags)
1983 {
1984 const AVOption *o;
1985 void *target;
1986 if (!obj)
1987 return AVERROR(EINVAL);
1988 o = av_opt_find2(obj, name, NULL, 0, search_flags, &target);
1989 if (!o)
1990 return AVERROR_OPTION_NOT_FOUND;
1991 return av_opt_is_set_to_default(target, o);
1992 }
1993
av_opt_serialize(void * obj,int opt_flags,int flags,char ** buffer,const char key_val_sep,const char pairs_sep)1994 int av_opt_serialize(void *obj, int opt_flags, int flags, char **buffer,
1995 const char key_val_sep, const char pairs_sep)
1996 {
1997 const AVOption *o = NULL;
1998 uint8_t *buf;
1999 AVBPrint bprint;
2000 int ret, cnt = 0;
2001 const char special_chars[] = {pairs_sep, key_val_sep, '\0'};
2002
2003 if (pairs_sep == '\0' || key_val_sep == '\0' || pairs_sep == key_val_sep ||
2004 pairs_sep == '\\' || key_val_sep == '\\') {
2005 av_log(obj, AV_LOG_ERROR, "Invalid separator(s) found.");
2006 return AVERROR(EINVAL);
2007 }
2008
2009 if (!obj || !buffer)
2010 return AVERROR(EINVAL);
2011
2012 *buffer = NULL;
2013 av_bprint_init(&bprint, 64, AV_BPRINT_SIZE_UNLIMITED);
2014
2015 while (o = av_opt_next(obj, o)) {
2016 if (o->type == AV_OPT_TYPE_CONST)
2017 continue;
2018 if ((flags & AV_OPT_SERIALIZE_OPT_FLAGS_EXACT) && o->flags != opt_flags)
2019 continue;
2020 else if (((o->flags & opt_flags) != opt_flags))
2021 continue;
2022 if (flags & AV_OPT_SERIALIZE_SKIP_DEFAULTS && av_opt_is_set_to_default(obj, o) > 0)
2023 continue;
2024 if ((ret = av_opt_get(obj, o->name, 0, &buf)) < 0) {
2025 av_bprint_finalize(&bprint, NULL);
2026 return ret;
2027 }
2028 if (buf) {
2029 if (cnt++)
2030 av_bprint_append_data(&bprint, &pairs_sep, 1);
2031 av_bprint_escape(&bprint, o->name, special_chars, AV_ESCAPE_MODE_BACKSLASH, 0);
2032 av_bprint_append_data(&bprint, &key_val_sep, 1);
2033 av_bprint_escape(&bprint, buf, special_chars, AV_ESCAPE_MODE_BACKSLASH, 0);
2034 av_freep(&buf);
2035 }
2036 }
2037 av_bprint_finalize(&bprint, buffer);
2038 return 0;
2039 }
2040