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 
233     if (o->type == AV_OPT_TYPE_RATIONAL || o->type == AV_OPT_TYPE_VIDEO_RATE) {
234         int num, den;
235         char c;
236         if (sscanf(val, "%d%*1[:/]%d%c", &num, &den, &c) == 2) {
237             if ((ret = write_number(obj, o, dst, 1, den, num)) >= 0)
238                 return ret;
239             ret = 0;
240         }
241     }
242 
243     for (;;) {
244         int i = 0;
245         char buf[256];
246         int cmd = 0;
247         double d;
248         int64_t intnum = 1;
249 
250         if (o->type == AV_OPT_TYPE_FLAGS) {
251             if (*val == '+' || *val == '-')
252                 cmd = *(val++);
253             for (; i < sizeof(buf) - 1 && val[i] && val[i] != '+' && val[i] != '-'; i++)
254                 buf[i] = val[i];
255             buf[i] = 0;
256         }
257 
258         {
259             int res;
260             int ci = 0;
261             double const_values[64];
262             const char * const_names[64];
263             int search_flags = (o->flags & AV_OPT_FLAG_CHILD_CONSTS) ? AV_OPT_SEARCH_CHILDREN : 0;
264             const AVOption *o_named = av_opt_find(target_obj, i ? buf : val, o->unit, 0, search_flags);
265             if (o_named && o_named->type == AV_OPT_TYPE_CONST)
266                 d = DEFAULT_NUMVAL(o_named);
267             else {
268                 if (o->unit) {
269                     for (o_named = NULL; o_named = av_opt_next(target_obj, o_named); ) {
270                         if (o_named->type == AV_OPT_TYPE_CONST &&
271                             o_named->unit &&
272                             !strcmp(o_named->unit, o->unit)) {
273                             if (ci + 6 >= FF_ARRAY_ELEMS(const_values)) {
274                                 av_log(obj, AV_LOG_ERROR, "const_values array too small for %s\n", o->unit);
275                                 return AVERROR_PATCHWELCOME;
276                             }
277                             const_names [ci  ] = o_named->name;
278                             const_values[ci++] = DEFAULT_NUMVAL(o_named);
279                         }
280                     }
281                 }
282                 const_names [ci  ] = "default";
283                 const_values[ci++] = DEFAULT_NUMVAL(o);
284                 const_names [ci  ] = "max";
285                 const_values[ci++] = o->max;
286                 const_names [ci  ] = "min";
287                 const_values[ci++] = o->min;
288                 const_names [ci  ] = "none";
289                 const_values[ci++] = 0;
290                 const_names [ci  ] = "all";
291                 const_values[ci++] = ~0;
292                 const_names [ci] = NULL;
293                 const_values[ci] = 0;
294 
295                 res = av_expr_parse_and_eval(&d, i ? buf : val, const_names,
296                                             const_values, NULL, NULL, NULL, NULL, NULL, 0, obj);
297                 if (res < 0) {
298                     av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\"\n", val);
299                     return res;
300                 }
301             }
302         }
303         if (o->type == AV_OPT_TYPE_FLAGS) {
304             read_number(o, dst, NULL, NULL, &intnum);
305             if (cmd == '+')
306                 d = intnum | (int64_t)d;
307             else if (cmd == '-')
308                 d = intnum &~(int64_t)d;
309         }
310 
311         if ((ret = write_number(obj, o, dst, d, 1, 1)) < 0)
312             return ret;
313         val += i;
314         if (!i || !*val)
315             return 0;
316     }
317 }
318 
set_string_image_size(void * obj,const AVOption * o,const char * val,int * dst)319 static int set_string_image_size(void *obj, const AVOption *o, const char *val, int *dst)
320 {
321     int ret;
322 
323     if (!val || !strcmp(val, "none")) {
324         dst[0] =
325         dst[1] = 0;
326         return 0;
327     }
328     ret = av_parse_video_size(dst, dst + 1, val);
329     if (ret < 0)
330         av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as image size\n", val);
331     return ret;
332 }
333 
set_string_video_rate(void * obj,const AVOption * o,const char * val,AVRational * dst)334 static int set_string_video_rate(void *obj, const AVOption *o, const char *val, AVRational *dst)
335 {
336     int ret = av_parse_video_rate(dst, val);
337     if (ret < 0)
338         av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as video rate\n", val);
339     return ret;
340 }
341 
set_string_color(void * obj,const AVOption * o,const char * val,uint8_t * dst)342 static int set_string_color(void *obj, const AVOption *o, const char *val, uint8_t *dst)
343 {
344     int ret;
345 
346     if (!val) {
347         return 0;
348     } else {
349         ret = av_parse_color(dst, val, -1, obj);
350         if (ret < 0)
351             av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as color\n", val);
352         return ret;
353     }
354     return 0;
355 }
356 
get_bool_name(int val)357 static const char *get_bool_name(int val)
358 {
359     if (val < 0)
360         return "auto";
361     return val ? "true" : "false";
362 }
363 
set_string_bool(void * obj,const AVOption * o,const char * val,int * dst)364 static int set_string_bool(void *obj, const AVOption *o, const char *val, int *dst)
365 {
366     int n;
367 
368     if (!val)
369         return 0;
370 
371     if (!strcmp(val, "auto")) {
372         n = -1;
373     } else if (av_match_name(val, "true,y,yes,enable,enabled,on")) {
374         n = 1;
375     } else if (av_match_name(val, "false,n,no,disable,disabled,off")) {
376         n = 0;
377     } else {
378         char *end = NULL;
379         n = strtol(val, &end, 10);
380         if (val + strlen(val) != end)
381             goto fail;
382     }
383 
384     if (n < o->min || n > o->max)
385         goto fail;
386 
387     *dst = n;
388     return 0;
389 
390 fail:
391     av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as boolean\n", val);
392     return AVERROR(EINVAL);
393 }
394 
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)395 static int set_string_fmt(void *obj, const AVOption *o, const char *val, uint8_t *dst,
396                           int fmt_nb, int ((*get_fmt)(const char *)), const char *desc)
397 {
398     int fmt, min, max;
399 
400     if (!val || !strcmp(val, "none")) {
401         fmt = -1;
402     } else {
403         fmt = get_fmt(val);
404         if (fmt == -1) {
405             char *tail;
406             fmt = strtol(val, &tail, 0);
407             if (*tail || (unsigned)fmt >= fmt_nb) {
408                 av_log(obj, AV_LOG_ERROR,
409                        "Unable to parse option value \"%s\" as %s\n", val, desc);
410                 return AVERROR(EINVAL);
411             }
412         }
413     }
414 
415     min = FFMAX(o->min, -1);
416     max = FFMIN(o->max, fmt_nb-1);
417 
418     // hack for compatibility with old ffmpeg
419     if(min == 0 && max == 0) {
420         min = -1;
421         max = fmt_nb-1;
422     }
423 
424     if (fmt < min || fmt > max) {
425         av_log(obj, AV_LOG_ERROR,
426                "Value %d for parameter '%s' out of %s format range [%d - %d]\n",
427                fmt, o->name, desc, min, max);
428         return AVERROR(ERANGE);
429     }
430 
431     *(int *)dst = fmt;
432     return 0;
433 }
434 
set_string_pixel_fmt(void * obj,const AVOption * o,const char * val,uint8_t * dst)435 static int set_string_pixel_fmt(void *obj, const AVOption *o, const char *val, uint8_t *dst)
436 {
437     return set_string_fmt(obj, o, val, dst,
438                           AV_PIX_FMT_NB, av_get_pix_fmt, "pixel format");
439 }
440 
set_string_sample_fmt(void * obj,const AVOption * o,const char * val,uint8_t * dst)441 static int set_string_sample_fmt(void *obj, const AVOption *o, const char *val, uint8_t *dst)
442 {
443     return set_string_fmt(obj, o, val, dst,
444                           AV_SAMPLE_FMT_NB, av_get_sample_fmt, "sample format");
445 }
446 
set_string_dict(void * obj,const AVOption * o,const char * val,uint8_t ** dst)447 static int set_string_dict(void *obj, const AVOption *o, const char *val, uint8_t **dst)
448 {
449     AVDictionary *options = NULL;
450 
451     if (val) {
452         int ret = av_dict_parse_string(&options, val, "=", ":", 0);
453         if (ret < 0) {
454             av_dict_free(&options);
455             return ret;
456         }
457     }
458 
459     av_dict_free((AVDictionary **)dst);
460     *dst = (uint8_t *)options;
461 
462     return 0;
463 }
464 
av_opt_set(void * obj,const char * name,const char * val,int search_flags)465 int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
466 {
467     int ret = 0;
468     void *dst, *target_obj;
469     const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
470     if (!o || !target_obj)
471         return AVERROR_OPTION_NOT_FOUND;
472     if (!val && (o->type != AV_OPT_TYPE_STRING &&
473                  o->type != AV_OPT_TYPE_PIXEL_FMT && o->type != AV_OPT_TYPE_SAMPLE_FMT &&
474                  o->type != AV_OPT_TYPE_IMAGE_SIZE &&
475                  o->type != AV_OPT_TYPE_DURATION && o->type != AV_OPT_TYPE_COLOR &&
476                  o->type != AV_OPT_TYPE_CHANNEL_LAYOUT && o->type != AV_OPT_TYPE_BOOL))
477         return AVERROR(EINVAL);
478 
479     if (o->flags & AV_OPT_FLAG_READONLY)
480         return AVERROR(EINVAL);
481 
482     if (o->flags & AV_OPT_FLAG_DEPRECATED)
483         av_log(obj, AV_LOG_WARNING, "The \"%s\" option is deprecated: %s\n", name, o->help);
484 
485     dst = ((uint8_t *)target_obj) + o->offset;
486     switch (o->type) {
487     case AV_OPT_TYPE_BOOL:
488         return set_string_bool(obj, o, val, dst);
489     case AV_OPT_TYPE_STRING:
490         return set_string(obj, o, val, dst);
491     case AV_OPT_TYPE_BINARY:
492         return set_string_binary(obj, o, val, dst);
493     case AV_OPT_TYPE_FLAGS:
494     case AV_OPT_TYPE_INT:
495     case AV_OPT_TYPE_INT64:
496     case AV_OPT_TYPE_UINT64:
497     case AV_OPT_TYPE_FLOAT:
498     case AV_OPT_TYPE_DOUBLE:
499     case AV_OPT_TYPE_RATIONAL:
500         return set_string_number(obj, target_obj, o, val, dst);
501     case AV_OPT_TYPE_IMAGE_SIZE:
502         return set_string_image_size(obj, o, val, dst);
503     case AV_OPT_TYPE_VIDEO_RATE: {
504         AVRational tmp;
505         ret = set_string_video_rate(obj, o, val, &tmp);
506         if (ret < 0)
507             return ret;
508         return write_number(obj, o, dst, 1, tmp.den, tmp.num);
509     }
510     case AV_OPT_TYPE_PIXEL_FMT:
511         return set_string_pixel_fmt(obj, o, val, dst);
512     case AV_OPT_TYPE_SAMPLE_FMT:
513         return set_string_sample_fmt(obj, o, val, dst);
514     case AV_OPT_TYPE_DURATION:
515         {
516             int64_t usecs = 0;
517             if (val) {
518                 if ((ret = av_parse_time(&usecs, val, 1)) < 0) {
519                     av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as duration\n", val);
520                     return ret;
521                 }
522             }
523             if (usecs < o->min || usecs > o->max) {
524                 av_log(obj, AV_LOG_ERROR, "Value %f for parameter '%s' out of range [%g - %g]\n",
525                        usecs / 1000000.0, o->name, o->min / 1000000.0, o->max / 1000000.0);
526                 return AVERROR(ERANGE);
527             }
528             *(int64_t *)dst = usecs;
529             return 0;
530         }
531     case AV_OPT_TYPE_COLOR:
532         return set_string_color(obj, o, val, dst);
533     case AV_OPT_TYPE_CHANNEL_LAYOUT:
534         if (!val || !strcmp(val, "none")) {
535             *(int64_t *)dst = 0;
536         } else {
537             int64_t cl = av_get_channel_layout(val);
538             if (!cl) {
539                 av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as channel layout\n", val);
540                 ret = AVERROR(EINVAL);
541             }
542             *(int64_t *)dst = cl;
543             return ret;
544         }
545         break;
546     case AV_OPT_TYPE_DICT:
547         return set_string_dict(obj, o, val, dst);
548     }
549 
550     av_log(obj, AV_LOG_ERROR, "Invalid option type.\n");
551     return AVERROR(EINVAL);
552 }
553 
554 #define OPT_EVAL_NUMBER(name, opttype, vartype)                         \
555 int av_opt_eval_ ## name(void *obj, const AVOption *o,                  \
556                          const char *val, vartype *name ## _out)        \
557 {                                                                       \
558     if (!o || o->type != opttype || o->flags & AV_OPT_FLAG_READONLY)    \
559         return AVERROR(EINVAL);                                         \
560     return set_string_number(obj, obj, o, val, name ## _out);           \
561 }
562 
OPT_EVAL_NUMBER(flags,AV_OPT_TYPE_FLAGS,int)563 OPT_EVAL_NUMBER(flags,  AV_OPT_TYPE_FLAGS,    int)
564 OPT_EVAL_NUMBER(int,    AV_OPT_TYPE_INT,      int)
565 OPT_EVAL_NUMBER(int64,  AV_OPT_TYPE_INT64,    int64_t)
566 OPT_EVAL_NUMBER(float,  AV_OPT_TYPE_FLOAT,    float)
567 OPT_EVAL_NUMBER(double, AV_OPT_TYPE_DOUBLE,   double)
568 OPT_EVAL_NUMBER(q,      AV_OPT_TYPE_RATIONAL, AVRational)
569 
570 static int set_number(void *obj, const char *name, double num, int den, int64_t intnum,
571                       int search_flags)
572 {
573     void *dst, *target_obj;
574     const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
575 
576     if (!o || !target_obj)
577         return AVERROR_OPTION_NOT_FOUND;
578 
579     if (o->flags & AV_OPT_FLAG_READONLY)
580         return AVERROR(EINVAL);
581 
582     dst = ((uint8_t *)target_obj) + o->offset;
583     return write_number(obj, o, dst, num, den, intnum);
584 }
585 
av_opt_set_int(void * obj,const char * name,int64_t val,int search_flags)586 int av_opt_set_int(void *obj, const char *name, int64_t val, int search_flags)
587 {
588     return set_number(obj, name, 1, 1, val, search_flags);
589 }
590 
av_opt_set_double(void * obj,const char * name,double val,int search_flags)591 int av_opt_set_double(void *obj, const char *name, double val, int search_flags)
592 {
593     return set_number(obj, name, val, 1, 1, search_flags);
594 }
595 
av_opt_set_q(void * obj,const char * name,AVRational val,int search_flags)596 int av_opt_set_q(void *obj, const char *name, AVRational val, int search_flags)
597 {
598     return set_number(obj, name, val.num, val.den, 1, search_flags);
599 }
600 
av_opt_set_bin(void * obj,const char * name,const uint8_t * val,int len,int search_flags)601 int av_opt_set_bin(void *obj, const char *name, const uint8_t *val, int len, int search_flags)
602 {
603     void *target_obj;
604     const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
605     uint8_t *ptr;
606     uint8_t **dst;
607     int *lendst;
608 
609     if (!o || !target_obj)
610         return AVERROR_OPTION_NOT_FOUND;
611 
612     if (o->type != AV_OPT_TYPE_BINARY || o->flags & AV_OPT_FLAG_READONLY)
613         return AVERROR(EINVAL);
614 
615     ptr = len ? av_malloc(len) : NULL;
616     if (len && !ptr)
617         return AVERROR(ENOMEM);
618 
619     dst    = (uint8_t **)(((uint8_t *)target_obj) + o->offset);
620     lendst = (int *)(dst + 1);
621 
622     av_free(*dst);
623     *dst    = ptr;
624     *lendst = len;
625     if (len)
626         memcpy(ptr, val, len);
627 
628     return 0;
629 }
630 
av_opt_set_image_size(void * obj,const char * name,int w,int h,int search_flags)631 int av_opt_set_image_size(void *obj, const char *name, int w, int h, int search_flags)
632 {
633     void *target_obj;
634     const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
635 
636     if (!o || !target_obj)
637         return AVERROR_OPTION_NOT_FOUND;
638     if (o->type != AV_OPT_TYPE_IMAGE_SIZE) {
639         av_log(obj, AV_LOG_ERROR,
640                "The value set by option '%s' is not an image size.\n", o->name);
641         return AVERROR(EINVAL);
642     }
643     if (w<0 || h<0) {
644         av_log(obj, AV_LOG_ERROR,
645                "Invalid negative size value %dx%d for size '%s'\n", w, h, o->name);
646         return AVERROR(EINVAL);
647     }
648     *(int *)(((uint8_t *)target_obj)             + o->offset) = w;
649     *(int *)(((uint8_t *)target_obj+sizeof(int)) + o->offset) = h;
650     return 0;
651 }
652 
av_opt_set_video_rate(void * obj,const char * name,AVRational val,int search_flags)653 int av_opt_set_video_rate(void *obj, const char *name, AVRational val, int search_flags)
654 {
655     void *target_obj;
656     const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
657 
658     if (!o || !target_obj)
659         return AVERROR_OPTION_NOT_FOUND;
660     if (o->type != AV_OPT_TYPE_VIDEO_RATE) {
661         av_log(obj, AV_LOG_ERROR,
662                "The value set by option '%s' is not a video rate.\n", o->name);
663         return AVERROR(EINVAL);
664     }
665     if (val.num <= 0 || val.den <= 0)
666         return AVERROR(EINVAL);
667     return set_number(obj, name, val.num, val.den, 1, search_flags);
668 }
669 
set_format(void * obj,const char * name,int fmt,int search_flags,enum AVOptionType type,const char * desc,int nb_fmts)670 static int set_format(void *obj, const char *name, int fmt, int search_flags,
671                       enum AVOptionType type, const char *desc, int nb_fmts)
672 {
673     void *target_obj;
674     const AVOption *o = av_opt_find2(obj, name, NULL, 0,
675                                      search_flags, &target_obj);
676     int min, max;
677 
678     if (!o || !target_obj)
679         return AVERROR_OPTION_NOT_FOUND;
680     if (o->type != type) {
681         av_log(obj, AV_LOG_ERROR,
682                "The value set by option '%s' is not a %s format", name, desc);
683         return AVERROR(EINVAL);
684     }
685 
686     min = FFMAX(o->min, -1);
687     max = FFMIN(o->max, nb_fmts-1);
688 
689     if (fmt < min || fmt > max) {
690         av_log(obj, AV_LOG_ERROR,
691                "Value %d for parameter '%s' out of %s format range [%d - %d]\n",
692                fmt, name, desc, min, max);
693         return AVERROR(ERANGE);
694     }
695     *(int *)(((uint8_t *)target_obj) + o->offset) = fmt;
696     return 0;
697 }
698 
av_opt_set_pixel_fmt(void * obj,const char * name,enum AVPixelFormat fmt,int search_flags)699 int av_opt_set_pixel_fmt(void *obj, const char *name, enum AVPixelFormat fmt, int search_flags)
700 {
701     return set_format(obj, name, fmt, search_flags, AV_OPT_TYPE_PIXEL_FMT, "pixel", AV_PIX_FMT_NB);
702 }
703 
av_opt_set_sample_fmt(void * obj,const char * name,enum AVSampleFormat fmt,int search_flags)704 int av_opt_set_sample_fmt(void *obj, const char *name, enum AVSampleFormat fmt, int search_flags)
705 {
706     return set_format(obj, name, fmt, search_flags, AV_OPT_TYPE_SAMPLE_FMT, "sample", AV_SAMPLE_FMT_NB);
707 }
708 
av_opt_set_channel_layout(void * obj,const char * name,int64_t cl,int search_flags)709 int av_opt_set_channel_layout(void *obj, const char *name, int64_t cl, int search_flags)
710 {
711     void *target_obj;
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->type != AV_OPT_TYPE_CHANNEL_LAYOUT) {
717         av_log(obj, AV_LOG_ERROR,
718                "The value set by option '%s' is not a channel layout.\n", o->name);
719         return AVERROR(EINVAL);
720     }
721     *(int64_t *)(((uint8_t *)target_obj) + o->offset) = cl;
722     return 0;
723 }
724 
av_opt_set_dict_val(void * obj,const char * name,const AVDictionary * val,int search_flags)725 int av_opt_set_dict_val(void *obj, const char *name, const AVDictionary *val,
726                         int search_flags)
727 {
728     void *target_obj;
729     AVDictionary **dst;
730     const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
731 
732     if (!o || !target_obj)
733         return AVERROR_OPTION_NOT_FOUND;
734     if (o->flags & AV_OPT_FLAG_READONLY)
735         return AVERROR(EINVAL);
736 
737     dst = (AVDictionary **)(((uint8_t *)target_obj) + o->offset);
738     av_dict_free(dst);
739     av_dict_copy(dst, val, 0);
740 
741     return 0;
742 }
743 
format_duration(char * buf,size_t size,int64_t d)744 static void format_duration(char *buf, size_t size, int64_t d)
745 {
746     char *e;
747 
748     av_assert0(size >= 25);
749     if (d < 0 && d != INT64_MIN) {
750         *(buf++) = '-';
751         size--;
752         d = -d;
753     }
754     if (d == INT64_MAX)
755         snprintf(buf, size, "INT64_MAX");
756     else if (d == INT64_MIN)
757         snprintf(buf, size, "INT64_MIN");
758     else if (d > (int64_t)3600*1000000)
759         snprintf(buf, size, "%"PRId64":%02d:%02d.%06d", d / 3600000000,
760                  (int)((d / 60000000) % 60),
761                  (int)((d / 1000000) % 60),
762                  (int)(d % 1000000));
763     else if (d > 60*1000000)
764         snprintf(buf, size, "%d:%02d.%06d",
765                  (int)(d / 60000000),
766                  (int)((d / 1000000) % 60),
767                  (int)(d % 1000000));
768     else
769         snprintf(buf, size, "%d.%06d",
770                  (int)(d / 1000000),
771                  (int)(d % 1000000));
772     e = buf + strlen(buf);
773     while (e > buf && e[-1] == '0')
774         *(--e) = 0;
775     if (e > buf && e[-1] == '.')
776         *(--e) = 0;
777 }
778 
av_opt_get(void * obj,const char * name,int search_flags,uint8_t ** out_val)779 int av_opt_get(void *obj, const char *name, int search_flags, uint8_t **out_val)
780 {
781     void *dst, *target_obj;
782     const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
783     uint8_t *bin, buf[128];
784     int len, i, ret;
785     int64_t i64;
786 
787     if (!o || !target_obj || (o->offset<=0 && o->type != AV_OPT_TYPE_CONST))
788         return AVERROR_OPTION_NOT_FOUND;
789 
790     if (o->flags & AV_OPT_FLAG_DEPRECATED)
791         av_log(obj, AV_LOG_WARNING, "The \"%s\" option is deprecated: %s\n", name, o->help);
792 
793     dst = (uint8_t *)target_obj + o->offset;
794 
795     buf[0] = 0;
796     switch (o->type) {
797     case AV_OPT_TYPE_BOOL:
798         ret = snprintf(buf, sizeof(buf), "%s", (char *)av_x_if_null(get_bool_name(*(int *)dst), "invalid"));
799         break;
800     case AV_OPT_TYPE_FLAGS:
801         ret = snprintf(buf, sizeof(buf), "0x%08X", *(int *)dst);
802         break;
803     case AV_OPT_TYPE_INT:
804         ret = snprintf(buf, sizeof(buf), "%d", *(int *)dst);
805         break;
806     case AV_OPT_TYPE_INT64:
807         ret = snprintf(buf, sizeof(buf), "%"PRId64, *(int64_t *)dst);
808         break;
809     case AV_OPT_TYPE_UINT64:
810         ret = snprintf(buf, sizeof(buf), "%"PRIu64, *(uint64_t *)dst);
811         break;
812     case AV_OPT_TYPE_FLOAT:
813         ret = snprintf(buf, sizeof(buf), "%f", *(float *)dst);
814         break;
815     case AV_OPT_TYPE_DOUBLE:
816         ret = snprintf(buf, sizeof(buf), "%f", *(double *)dst);
817         break;
818     case AV_OPT_TYPE_VIDEO_RATE:
819     case AV_OPT_TYPE_RATIONAL:
820         ret = snprintf(buf, sizeof(buf), "%d/%d", ((AVRational *)dst)->num, ((AVRational *)dst)->den);
821         break;
822     case AV_OPT_TYPE_CONST:
823         ret = snprintf(buf, sizeof(buf), "%f", o->default_val.dbl);
824         break;
825     case AV_OPT_TYPE_STRING:
826         if (*(uint8_t **)dst) {
827             *out_val = av_strdup(*(uint8_t **)dst);
828         } else if (search_flags & AV_OPT_ALLOW_NULL) {
829             *out_val = NULL;
830             return 0;
831         } else {
832             *out_val = av_strdup("");
833         }
834         return *out_val ? 0 : AVERROR(ENOMEM);
835     case AV_OPT_TYPE_BINARY:
836         if (!*(uint8_t **)dst && (search_flags & AV_OPT_ALLOW_NULL)) {
837             *out_val = NULL;
838             return 0;
839         }
840         len = *(int *)(((uint8_t *)dst) + sizeof(uint8_t *));
841         if ((uint64_t)len * 2 + 1 > INT_MAX)
842             return AVERROR(EINVAL);
843         if (!(*out_val = av_malloc(len * 2 + 1)))
844             return AVERROR(ENOMEM);
845         if (!len) {
846             *out_val[0] = '\0';
847             return 0;
848         }
849         bin = *(uint8_t **)dst;
850         for (i = 0; i < len; i++)
851             snprintf(*out_val + i * 2, 3, "%02X", bin[i]);
852         return 0;
853     case AV_OPT_TYPE_IMAGE_SIZE:
854         ret = snprintf(buf, sizeof(buf), "%dx%d", ((int *)dst)[0], ((int *)dst)[1]);
855         break;
856     case AV_OPT_TYPE_PIXEL_FMT:
857         ret = snprintf(buf, sizeof(buf), "%s", (char *)av_x_if_null(av_get_pix_fmt_name(*(enum AVPixelFormat *)dst), "none"));
858         break;
859     case AV_OPT_TYPE_SAMPLE_FMT:
860         ret = snprintf(buf, sizeof(buf), "%s", (char *)av_x_if_null(av_get_sample_fmt_name(*(enum AVSampleFormat *)dst), "none"));
861         break;
862     case AV_OPT_TYPE_DURATION:
863         i64 = *(int64_t *)dst;
864         format_duration(buf, sizeof(buf), i64);
865         ret = strlen(buf); // no overflow possible, checked by an assert
866         break;
867     case AV_OPT_TYPE_COLOR:
868         ret = snprintf(buf, sizeof(buf), "0x%02x%02x%02x%02x",
869                        (int)((uint8_t *)dst)[0], (int)((uint8_t *)dst)[1],
870                        (int)((uint8_t *)dst)[2], (int)((uint8_t *)dst)[3]);
871         break;
872     case AV_OPT_TYPE_CHANNEL_LAYOUT:
873         i64 = *(int64_t *)dst;
874         ret = snprintf(buf, sizeof(buf), "0x%"PRIx64, i64);
875         break;
876     case AV_OPT_TYPE_DICT:
877         if (!*(AVDictionary **)dst && (search_flags & AV_OPT_ALLOW_NULL)) {
878             *out_val = NULL;
879             return 0;
880         }
881         return av_dict_get_string(*(AVDictionary **)dst, (char **)out_val, '=', ':');
882     default:
883         return AVERROR(EINVAL);
884     }
885 
886     if (ret >= sizeof(buf))
887         return AVERROR(EINVAL);
888     *out_val = av_strdup(buf);
889     return *out_val ? 0 : AVERROR(ENOMEM);
890 }
891 
get_number(void * obj,const char * name,const AVOption ** o_out,double * num,int * den,int64_t * intnum,int search_flags)892 static int get_number(void *obj, const char *name, const AVOption **o_out, double *num, int *den, int64_t *intnum,
893                       int search_flags)
894 {
895     void *dst, *target_obj;
896     const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
897     if (!o || !target_obj)
898         goto error;
899 
900     dst = ((uint8_t *)target_obj) + o->offset;
901 
902     if (o_out) *o_out= o;
903 
904     return read_number(o, dst, num, den, intnum);
905 
906 error:
907     *den    =
908     *intnum = 0;
909     return -1;
910 }
911 
av_opt_get_int(void * obj,const char * name,int search_flags,int64_t * out_val)912 int av_opt_get_int(void *obj, const char *name, int search_flags, int64_t *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     *out_val = num * intnum / den;
921     return 0;
922 }
923 
av_opt_get_double(void * obj,const char * name,int search_flags,double * out_val)924 int av_opt_get_double(void *obj, const char *name, int search_flags, double *out_val)
925 {
926     int64_t intnum = 1;
927     double num = 1;
928     int ret, den = 1;
929 
930     if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0)
931         return ret;
932     *out_val = num * intnum / den;
933     return 0;
934 }
935 
av_opt_get_q(void * obj,const char * name,int search_flags,AVRational * out_val)936 int av_opt_get_q(void *obj, const char *name, int search_flags, AVRational *out_val)
937 {
938     int64_t intnum = 1;
939     double num = 1;
940     int ret, den = 1;
941 
942     if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0)
943         return ret;
944 
945     if (num == 1.0 && (int)intnum == intnum)
946         *out_val = (AVRational){intnum, den};
947     else
948         *out_val = av_d2q(num*intnum/den, 1<<24);
949     return 0;
950 }
951 
av_opt_get_image_size(void * obj,const char * name,int search_flags,int * w_out,int * h_out)952 int av_opt_get_image_size(void *obj, const char *name, int search_flags, int *w_out, int *h_out)
953 {
954     void *dst, *target_obj;
955     const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
956     if (!o || !target_obj)
957         return AVERROR_OPTION_NOT_FOUND;
958     if (o->type != AV_OPT_TYPE_IMAGE_SIZE) {
959         av_log(obj, AV_LOG_ERROR,
960                "The value for option '%s' is not an image size.\n", name);
961         return AVERROR(EINVAL);
962     }
963 
964     dst = ((uint8_t*)target_obj) + o->offset;
965     if (w_out) *w_out = *(int *)dst;
966     if (h_out) *h_out = *((int *)dst+1);
967     return 0;
968 }
969 
av_opt_get_video_rate(void * obj,const char * name,int search_flags,AVRational * out_val)970 int av_opt_get_video_rate(void *obj, const char *name, int search_flags, AVRational *out_val)
971 {
972     int64_t intnum = 1;
973     double     num = 1;
974     int   ret, den = 1;
975 
976     if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0)
977         return ret;
978 
979     if (num == 1.0 && (int)intnum == intnum)
980         *out_val = (AVRational) { intnum, den };
981     else
982         *out_val = av_d2q(num * intnum / den, 1 << 24);
983     return 0;
984 }
985 
get_format(void * obj,const char * name,int search_flags,int * out_fmt,enum AVOptionType type,const char * desc)986 static int get_format(void *obj, const char *name, int search_flags, int *out_fmt,
987                       enum AVOptionType type, const char *desc)
988 {
989     void *dst, *target_obj;
990     const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
991     if (!o || !target_obj)
992         return AVERROR_OPTION_NOT_FOUND;
993     if (o->type != type) {
994         av_log(obj, AV_LOG_ERROR,
995                "The value for option '%s' is not a %s format.\n", desc, name);
996         return AVERROR(EINVAL);
997     }
998 
999     dst = ((uint8_t*)target_obj) + o->offset;
1000     *out_fmt = *(int *)dst;
1001     return 0;
1002 }
1003 
av_opt_get_pixel_fmt(void * obj,const char * name,int search_flags,enum AVPixelFormat * out_fmt)1004 int av_opt_get_pixel_fmt(void *obj, const char *name, int search_flags, enum AVPixelFormat *out_fmt)
1005 {
1006     return get_format(obj, name, search_flags, out_fmt, AV_OPT_TYPE_PIXEL_FMT, "pixel");
1007 }
1008 
av_opt_get_sample_fmt(void * obj,const char * name,int search_flags,enum AVSampleFormat * out_fmt)1009 int av_opt_get_sample_fmt(void *obj, const char *name, int search_flags, enum AVSampleFormat *out_fmt)
1010 {
1011     return get_format(obj, name, search_flags, out_fmt, AV_OPT_TYPE_SAMPLE_FMT, "sample");
1012 }
1013 
av_opt_get_channel_layout(void * obj,const char * name,int search_flags,int64_t * cl)1014 int av_opt_get_channel_layout(void *obj, const char *name, int search_flags, int64_t *cl)
1015 {
1016     void *dst, *target_obj;
1017     const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
1018     if (!o || !target_obj)
1019         return AVERROR_OPTION_NOT_FOUND;
1020     if (o->type != AV_OPT_TYPE_CHANNEL_LAYOUT) {
1021         av_log(obj, AV_LOG_ERROR,
1022                "The value for option '%s' is not a channel layout.\n", name);
1023         return AVERROR(EINVAL);
1024     }
1025 
1026     dst = ((uint8_t*)target_obj) + o->offset;
1027     *cl = *(int64_t *)dst;
1028     return 0;
1029 }
1030 
av_opt_get_dict_val(void * obj,const char * name,int search_flags,AVDictionary ** out_val)1031 int av_opt_get_dict_val(void *obj, const char *name, int search_flags, AVDictionary **out_val)
1032 {
1033     void *target_obj;
1034     AVDictionary *src;
1035     const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
1036 
1037     if (!o || !target_obj)
1038         return AVERROR_OPTION_NOT_FOUND;
1039     if (o->type != AV_OPT_TYPE_DICT)
1040         return AVERROR(EINVAL);
1041 
1042     src = *(AVDictionary **)(((uint8_t *)target_obj) + o->offset);
1043     av_dict_copy(out_val, src, 0);
1044 
1045     return 0;
1046 }
1047 
av_opt_flag_is_set(void * obj,const char * field_name,const char * flag_name)1048 int av_opt_flag_is_set(void *obj, const char *field_name, const char *flag_name)
1049 {
1050     const AVOption *field = av_opt_find(obj, field_name, NULL, 0, 0);
1051     const AVOption *flag  = av_opt_find(obj, flag_name,
1052                                         field ? field->unit : NULL, 0, 0);
1053     int64_t res;
1054 
1055     if (!field || !flag || flag->type != AV_OPT_TYPE_CONST ||
1056         av_opt_get_int(obj, field_name, 0, &res) < 0)
1057         return 0;
1058     return res & flag->default_val.i64;
1059 }
1060 
log_int_value(void * av_log_obj,int level,int64_t i)1061 static void log_int_value(void *av_log_obj, int level, int64_t i)
1062 {
1063     if (i == INT_MAX) {
1064         av_log(av_log_obj, level, "INT_MAX");
1065     } else if (i == INT_MIN) {
1066         av_log(av_log_obj, level, "INT_MIN");
1067     } else if (i == UINT32_MAX) {
1068         av_log(av_log_obj, level, "UINT32_MAX");
1069     } else if (i == INT64_MAX) {
1070         av_log(av_log_obj, level, "I64_MAX");
1071     } else if (i == INT64_MIN) {
1072         av_log(av_log_obj, level, "I64_MIN");
1073     } else {
1074         av_log(av_log_obj, level, "%"PRId64, i);
1075     }
1076 }
1077 
log_value(void * av_log_obj,int level,double d)1078 static void log_value(void *av_log_obj, int level, double d)
1079 {
1080     if      (d == INT_MAX) {
1081         av_log(av_log_obj, level, "INT_MAX");
1082     } else if (d == INT_MIN) {
1083         av_log(av_log_obj, level, "INT_MIN");
1084     } else if (d == UINT32_MAX) {
1085         av_log(av_log_obj, level, "UINT32_MAX");
1086     } else if (d == (double)INT64_MAX) {
1087         av_log(av_log_obj, level, "I64_MAX");
1088     } else if (d == INT64_MIN) {
1089         av_log(av_log_obj, level, "I64_MIN");
1090     } else if (d == FLT_MAX) {
1091         av_log(av_log_obj, level, "FLT_MAX");
1092     } else if (d == FLT_MIN) {
1093         av_log(av_log_obj, level, "FLT_MIN");
1094     } else if (d == -FLT_MAX) {
1095         av_log(av_log_obj, level, "-FLT_MAX");
1096     } else if (d == -FLT_MIN) {
1097         av_log(av_log_obj, level, "-FLT_MIN");
1098     } else if (d == DBL_MAX) {
1099         av_log(av_log_obj, level, "DBL_MAX");
1100     } else if (d == DBL_MIN) {
1101         av_log(av_log_obj, level, "DBL_MIN");
1102     } else if (d == -DBL_MAX) {
1103         av_log(av_log_obj, level, "-DBL_MAX");
1104     } else if (d == -DBL_MIN) {
1105         av_log(av_log_obj, level, "-DBL_MIN");
1106     } else {
1107         av_log(av_log_obj, level, "%g", d);
1108     }
1109 }
1110 
get_opt_const_name(void * obj,const char * unit,int64_t value)1111 static const char *get_opt_const_name(void *obj, const char *unit, int64_t value)
1112 {
1113     const AVOption *opt = NULL;
1114 
1115     if (!unit)
1116         return NULL;
1117     while ((opt = av_opt_next(obj, opt)))
1118         if (opt->type == AV_OPT_TYPE_CONST && !strcmp(opt->unit, unit) &&
1119             opt->default_val.i64 == value)
1120             return opt->name;
1121     return NULL;
1122 }
1123 
get_opt_flags_string(void * obj,const char * unit,int64_t value)1124 static char *get_opt_flags_string(void *obj, const char *unit, int64_t value)
1125 {
1126     const AVOption *opt = NULL;
1127     char flags[512];
1128 
1129     flags[0] = 0;
1130     if (!unit)
1131         return NULL;
1132     while ((opt = av_opt_next(obj, opt))) {
1133         if (opt->type == AV_OPT_TYPE_CONST && !strcmp(opt->unit, unit) &&
1134             opt->default_val.i64 & value) {
1135             if (flags[0])
1136                 av_strlcatf(flags, sizeof(flags), "+");
1137             av_strlcatf(flags, sizeof(flags), "%s", opt->name);
1138         }
1139     }
1140     if (flags[0])
1141         return av_strdup(flags);
1142     return NULL;
1143 }
1144 
opt_list(void * obj,void * av_log_obj,const char * unit,int req_flags,int rej_flags,enum AVOptionType parent_type)1145 static void opt_list(void *obj, void *av_log_obj, const char *unit,
1146                      int req_flags, int rej_flags, enum AVOptionType parent_type)
1147 {
1148     const AVOption *opt = NULL;
1149     AVOptionRanges *r;
1150     int i;
1151 
1152     while ((opt = av_opt_next(obj, opt))) {
1153         if (!(opt->flags & req_flags) || (opt->flags & rej_flags))
1154             continue;
1155 
1156         /* Don't print CONST's on level one.
1157          * Don't print anything but CONST's on level two.
1158          * Only print items from the requested unit.
1159          */
1160         if (!unit && opt->type == AV_OPT_TYPE_CONST)
1161             continue;
1162         else if (unit && opt->type != AV_OPT_TYPE_CONST)
1163             continue;
1164         else if (unit && opt->type == AV_OPT_TYPE_CONST && strcmp(unit, opt->unit))
1165             continue;
1166         else if (unit && opt->type == AV_OPT_TYPE_CONST)
1167             av_log(av_log_obj, AV_LOG_INFO, "     %-15s ", opt->name);
1168         else
1169             av_log(av_log_obj, AV_LOG_INFO, "  %s%-17s ",
1170                    (opt->flags & AV_OPT_FLAG_FILTERING_PARAM) ? "" : "-",
1171                    opt->name);
1172 
1173         switch (opt->type) {
1174             case AV_OPT_TYPE_FLAGS:
1175                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<flags>");
1176                 break;
1177             case AV_OPT_TYPE_INT:
1178                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<int>");
1179                 break;
1180             case AV_OPT_TYPE_INT64:
1181                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<int64>");
1182                 break;
1183             case AV_OPT_TYPE_UINT64:
1184                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<uint64>");
1185                 break;
1186             case AV_OPT_TYPE_DOUBLE:
1187                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<double>");
1188                 break;
1189             case AV_OPT_TYPE_FLOAT:
1190                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<float>");
1191                 break;
1192             case AV_OPT_TYPE_STRING:
1193                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<string>");
1194                 break;
1195             case AV_OPT_TYPE_RATIONAL:
1196                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<rational>");
1197                 break;
1198             case AV_OPT_TYPE_BINARY:
1199                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<binary>");
1200                 break;
1201             case AV_OPT_TYPE_DICT:
1202                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<dictionary>");
1203                 break;
1204             case AV_OPT_TYPE_IMAGE_SIZE:
1205                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<image_size>");
1206                 break;
1207             case AV_OPT_TYPE_VIDEO_RATE:
1208                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<video_rate>");
1209                 break;
1210             case AV_OPT_TYPE_PIXEL_FMT:
1211                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<pix_fmt>");
1212                 break;
1213             case AV_OPT_TYPE_SAMPLE_FMT:
1214                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<sample_fmt>");
1215                 break;
1216             case AV_OPT_TYPE_DURATION:
1217                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<duration>");
1218                 break;
1219             case AV_OPT_TYPE_COLOR:
1220                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<color>");
1221                 break;
1222             case AV_OPT_TYPE_CHANNEL_LAYOUT:
1223                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<channel_layout>");
1224                 break;
1225             case AV_OPT_TYPE_BOOL:
1226                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<boolean>");
1227                 break;
1228             case AV_OPT_TYPE_CONST:
1229                 if (parent_type == AV_OPT_TYPE_INT)
1230                     av_log(av_log_obj, AV_LOG_INFO, "%-12"PRId64" ", opt->default_val.i64);
1231                 else
1232                     av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "");
1233                 break;
1234             default:
1235                 av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "");
1236                 break;
1237         }
1238         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_ENCODING_PARAM) ? 'E' : '.');
1239         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_DECODING_PARAM) ? 'D' : '.');
1240         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_FILTERING_PARAM)? 'F' : '.');
1241         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_VIDEO_PARAM   ) ? 'V' : '.');
1242         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_AUDIO_PARAM   ) ? 'A' : '.');
1243         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_SUBTITLE_PARAM) ? 'S' : '.');
1244         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_EXPORT)         ? 'X' : '.');
1245         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_READONLY)       ? 'R' : '.');
1246         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_BSF_PARAM)      ? 'B' : '.');
1247         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_RUNTIME_PARAM)  ? 'T' : '.');
1248         av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_DEPRECATED)     ? 'P' : '.');
1249 
1250         if (opt->help)
1251             av_log(av_log_obj, AV_LOG_INFO, " %s", opt->help);
1252 
1253         if (av_opt_query_ranges(&r, obj, opt->name, AV_OPT_SEARCH_FAKE_OBJ) >= 0) {
1254             switch (opt->type) {
1255             case AV_OPT_TYPE_INT:
1256             case AV_OPT_TYPE_INT64:
1257             case AV_OPT_TYPE_UINT64:
1258             case AV_OPT_TYPE_DOUBLE:
1259             case AV_OPT_TYPE_FLOAT:
1260             case AV_OPT_TYPE_RATIONAL:
1261                 for (i = 0; i < r->nb_ranges; i++) {
1262                     av_log(av_log_obj, AV_LOG_INFO, " (from ");
1263                     log_value(av_log_obj, AV_LOG_INFO, r->range[i]->value_min);
1264                     av_log(av_log_obj, AV_LOG_INFO, " to ");
1265                     log_value(av_log_obj, AV_LOG_INFO, r->range[i]->value_max);
1266                     av_log(av_log_obj, AV_LOG_INFO, ")");
1267                 }
1268                 break;
1269             }
1270             av_opt_freep_ranges(&r);
1271         }
1272 
1273         if (opt->type != AV_OPT_TYPE_CONST  &&
1274             opt->type != AV_OPT_TYPE_BINARY &&
1275                 !((opt->type == AV_OPT_TYPE_COLOR      ||
1276                    opt->type == AV_OPT_TYPE_IMAGE_SIZE ||
1277                    opt->type == AV_OPT_TYPE_STRING     ||
1278                    opt->type == AV_OPT_TYPE_DICT       ||
1279                    opt->type == AV_OPT_TYPE_VIDEO_RATE) &&
1280                   !opt->default_val.str)) {
1281             av_log(av_log_obj, AV_LOG_INFO, " (default ");
1282             switch (opt->type) {
1283             case AV_OPT_TYPE_BOOL:
1284                 av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(get_bool_name(opt->default_val.i64), "invalid"));
1285                 break;
1286             case AV_OPT_TYPE_FLAGS: {
1287                 char *def_flags = get_opt_flags_string(obj, opt->unit, opt->default_val.i64);
1288                 if (def_flags) {
1289                     av_log(av_log_obj, AV_LOG_INFO, "%s", def_flags);
1290                     av_freep(&def_flags);
1291                 } else {
1292                     av_log(av_log_obj, AV_LOG_INFO, "%"PRIX64, opt->default_val.i64);
1293                 }
1294                 break;
1295             }
1296             case AV_OPT_TYPE_DURATION: {
1297                 char buf[25];
1298                 format_duration(buf, sizeof(buf), opt->default_val.i64);
1299                 av_log(av_log_obj, AV_LOG_INFO, "%s", buf);
1300                 break;
1301             }
1302             case AV_OPT_TYPE_INT:
1303             case AV_OPT_TYPE_UINT64:
1304             case AV_OPT_TYPE_INT64: {
1305                 const char *def_const = get_opt_const_name(obj, opt->unit, opt->default_val.i64);
1306                 if (def_const)
1307                     av_log(av_log_obj, AV_LOG_INFO, "%s", def_const);
1308                 else
1309                     log_int_value(av_log_obj, AV_LOG_INFO, opt->default_val.i64);
1310                 break;
1311             }
1312             case AV_OPT_TYPE_DOUBLE:
1313             case AV_OPT_TYPE_FLOAT:
1314                 log_value(av_log_obj, AV_LOG_INFO, opt->default_val.dbl);
1315                 break;
1316             case AV_OPT_TYPE_RATIONAL: {
1317                 AVRational q = av_d2q(opt->default_val.dbl, INT_MAX);
1318                 av_log(av_log_obj, AV_LOG_INFO, "%d/%d", q.num, q.den); }
1319                 break;
1320             case AV_OPT_TYPE_PIXEL_FMT:
1321                 av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(av_get_pix_fmt_name(opt->default_val.i64), "none"));
1322                 break;
1323             case AV_OPT_TYPE_SAMPLE_FMT:
1324                 av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(av_get_sample_fmt_name(opt->default_val.i64), "none"));
1325                 break;
1326             case AV_OPT_TYPE_COLOR:
1327             case AV_OPT_TYPE_IMAGE_SIZE:
1328             case AV_OPT_TYPE_STRING:
1329             case AV_OPT_TYPE_DICT:
1330             case AV_OPT_TYPE_VIDEO_RATE:
1331                 av_log(av_log_obj, AV_LOG_INFO, "\"%s\"", opt->default_val.str);
1332                 break;
1333             case AV_OPT_TYPE_CHANNEL_LAYOUT:
1334                 av_log(av_log_obj, AV_LOG_INFO, "0x%"PRIx64, opt->default_val.i64);
1335                 break;
1336             }
1337             av_log(av_log_obj, AV_LOG_INFO, ")");
1338         }
1339 
1340         av_log(av_log_obj, AV_LOG_INFO, "\n");
1341         if (opt->unit && opt->type != AV_OPT_TYPE_CONST)
1342             opt_list(obj, av_log_obj, opt->unit, req_flags, rej_flags, opt->type);
1343     }
1344 }
1345 
av_opt_show2(void * obj,void * av_log_obj,int req_flags,int rej_flags)1346 int av_opt_show2(void *obj, void *av_log_obj, int req_flags, int rej_flags)
1347 {
1348     if (!obj)
1349         return -1;
1350 
1351     av_log(av_log_obj, AV_LOG_INFO, "%s AVOptions:\n", (*(AVClass **)obj)->class_name);
1352 
1353     opt_list(obj, av_log_obj, NULL, req_flags, rej_flags, -1);
1354 
1355     return 0;
1356 }
1357 
av_opt_set_defaults(void * s)1358 void av_opt_set_defaults(void *s)
1359 {
1360     av_opt_set_defaults2(s, 0, 0);
1361 }
1362 
av_opt_set_defaults2(void * s,int mask,int flags)1363 void av_opt_set_defaults2(void *s, int mask, int flags)
1364 {
1365     const AVOption *opt = NULL;
1366     while ((opt = av_opt_next(s, opt))) {
1367         void *dst = ((uint8_t*)s) + opt->offset;
1368 
1369         if ((opt->flags & mask) != flags)
1370             continue;
1371 
1372         if (opt->flags & AV_OPT_FLAG_READONLY)
1373             continue;
1374 
1375         switch (opt->type) {
1376             case AV_OPT_TYPE_CONST:
1377                 /* Nothing to be done here */
1378                 break;
1379             case AV_OPT_TYPE_BOOL:
1380             case AV_OPT_TYPE_FLAGS:
1381             case AV_OPT_TYPE_INT:
1382             case AV_OPT_TYPE_INT64:
1383             case AV_OPT_TYPE_UINT64:
1384             case AV_OPT_TYPE_DURATION:
1385             case AV_OPT_TYPE_CHANNEL_LAYOUT:
1386             case AV_OPT_TYPE_PIXEL_FMT:
1387             case AV_OPT_TYPE_SAMPLE_FMT:
1388                 write_number(s, opt, dst, 1, 1, opt->default_val.i64);
1389                 break;
1390             case AV_OPT_TYPE_DOUBLE:
1391             case AV_OPT_TYPE_FLOAT: {
1392                 double val;
1393                 val = opt->default_val.dbl;
1394                 write_number(s, opt, dst, val, 1, 1);
1395             }
1396             break;
1397             case AV_OPT_TYPE_RATIONAL: {
1398                 AVRational val;
1399                 val = av_d2q(opt->default_val.dbl, INT_MAX);
1400                 write_number(s, opt, dst, 1, val.den, val.num);
1401             }
1402             break;
1403             case AV_OPT_TYPE_COLOR:
1404                 set_string_color(s, opt, opt->default_val.str, dst);
1405                 break;
1406             case AV_OPT_TYPE_STRING:
1407                 set_string(s, opt, opt->default_val.str, dst);
1408                 break;
1409             case AV_OPT_TYPE_IMAGE_SIZE:
1410                 set_string_image_size(s, opt, opt->default_val.str, dst);
1411                 break;
1412             case AV_OPT_TYPE_VIDEO_RATE:
1413                 set_string_video_rate(s, opt, opt->default_val.str, dst);
1414                 break;
1415             case AV_OPT_TYPE_BINARY:
1416                 set_string_binary(s, opt, opt->default_val.str, dst);
1417                 break;
1418             case AV_OPT_TYPE_DICT:
1419                 set_string_dict(s, opt, opt->default_val.str, dst);
1420                 break;
1421         default:
1422             av_log(s, AV_LOG_DEBUG, "AVOption type %d of option %s not implemented yet\n",
1423                    opt->type, opt->name);
1424         }
1425     }
1426 }
1427 
1428 /**
1429  * Store the value in the field in ctx that is named like key.
1430  * ctx must be an AVClass context, storing is done using AVOptions.
1431  *
1432  * @param buf the string to parse, buf will be updated to point at the
1433  * separator just after the parsed key/value pair
1434  * @param key_val_sep a 0-terminated list of characters used to
1435  * separate key from value
1436  * @param pairs_sep a 0-terminated list of characters used to separate
1437  * two pairs from each other
1438  * @return 0 if the key/value pair has been successfully parsed and
1439  * set, or a negative value corresponding to an AVERROR code in case
1440  * of error:
1441  * AVERROR(EINVAL) if the key/value pair cannot be parsed,
1442  * the error code issued by av_opt_set() if the key/value pair
1443  * cannot be set
1444  */
parse_key_value_pair(void * ctx,const char ** buf,const char * key_val_sep,const char * pairs_sep)1445 static int parse_key_value_pair(void *ctx, const char **buf,
1446                                 const char *key_val_sep, const char *pairs_sep)
1447 {
1448     char *key = av_get_token(buf, key_val_sep);
1449     char *val;
1450     int ret;
1451 
1452     if (!key)
1453         return AVERROR(ENOMEM);
1454 
1455     if (*key && strspn(*buf, key_val_sep)) {
1456         (*buf)++;
1457         val = av_get_token(buf, pairs_sep);
1458         if (!val) {
1459             av_freep(&key);
1460             return AVERROR(ENOMEM);
1461         }
1462     } else {
1463         av_log(ctx, AV_LOG_ERROR, "Missing key or no key/value separator found after key '%s'\n", key);
1464         av_free(key);
1465         return AVERROR(EINVAL);
1466     }
1467 
1468     av_log(ctx, AV_LOG_DEBUG, "Setting entry with key '%s' to value '%s'\n", key, val);
1469 
1470     ret = av_opt_set(ctx, key, val, AV_OPT_SEARCH_CHILDREN);
1471     if (ret == AVERROR_OPTION_NOT_FOUND)
1472         av_log(ctx, AV_LOG_ERROR, "Key '%s' not found.\n", key);
1473 
1474     av_free(key);
1475     av_free(val);
1476     return ret;
1477 }
1478 
av_set_options_string(void * ctx,const char * opts,const char * key_val_sep,const char * pairs_sep)1479 int av_set_options_string(void *ctx, const char *opts,
1480                           const char *key_val_sep, const char *pairs_sep)
1481 {
1482     int ret, count = 0;
1483 
1484     if (!opts)
1485         return 0;
1486 
1487     while (*opts) {
1488         if ((ret = parse_key_value_pair(ctx, &opts, key_val_sep, pairs_sep)) < 0)
1489             return ret;
1490         count++;
1491 
1492         if (*opts)
1493             opts++;
1494     }
1495 
1496     return count;
1497 }
1498 
1499 #define WHITESPACES " \n\t\r"
1500 
is_key_char(char c)1501 static int is_key_char(char c)
1502 {
1503     return (unsigned)((c | 32) - 'a') < 26 ||
1504            (unsigned)(c - '0') < 10 ||
1505            c == '-' || c == '_' || c == '/' || c == '.';
1506 }
1507 
1508 /**
1509  * Read a key from a string.
1510  *
1511  * The key consists of is_key_char characters and must be terminated by a
1512  * character from the delim string; spaces are ignored.
1513  *
1514  * @return  0 for success (even with ellipsis), <0 for failure
1515  */
get_key(const char ** ropts,const char * delim,char ** rkey)1516 static int get_key(const char **ropts, const char *delim, char **rkey)
1517 {
1518     const char *opts = *ropts;
1519     const char *key_start, *key_end;
1520 
1521     key_start = opts += strspn(opts, WHITESPACES);
1522     while (is_key_char(*opts))
1523         opts++;
1524     key_end = opts;
1525     opts += strspn(opts, WHITESPACES);
1526     if (!*opts || !strchr(delim, *opts))
1527         return AVERROR(EINVAL);
1528     opts++;
1529     if (!(*rkey = av_malloc(key_end - key_start + 1)))
1530         return AVERROR(ENOMEM);
1531     memcpy(*rkey, key_start, key_end - key_start);
1532     (*rkey)[key_end - key_start] = 0;
1533     *ropts = opts;
1534     return 0;
1535 }
1536 
av_opt_get_key_value(const char ** ropts,const char * key_val_sep,const char * pairs_sep,unsigned flags,char ** rkey,char ** rval)1537 int av_opt_get_key_value(const char **ropts,
1538                          const char *key_val_sep, const char *pairs_sep,
1539                          unsigned flags,
1540                          char **rkey, char **rval)
1541 {
1542     int ret;
1543     char *key = NULL, *val;
1544     const char *opts = *ropts;
1545 
1546     if ((ret = get_key(&opts, key_val_sep, &key)) < 0 &&
1547         !(flags & AV_OPT_FLAG_IMPLICIT_KEY))
1548         return AVERROR(EINVAL);
1549     if (!(val = av_get_token(&opts, pairs_sep))) {
1550         av_free(key);
1551         return AVERROR(ENOMEM);
1552     }
1553     *ropts = opts;
1554     *rkey  = key;
1555     *rval  = val;
1556     return 0;
1557 }
1558 
av_opt_set_from_string(void * ctx,const char * opts,const char * const * shorthand,const char * key_val_sep,const char * pairs_sep)1559 int av_opt_set_from_string(void *ctx, const char *opts,
1560                            const char *const *shorthand,
1561                            const char *key_val_sep, const char *pairs_sep)
1562 {
1563     int ret, count = 0;
1564     const char *dummy_shorthand = NULL;
1565     char *av_uninit(parsed_key), *av_uninit(value);
1566     const char *key;
1567 
1568     if (!opts)
1569         return 0;
1570     if (!shorthand)
1571         shorthand = &dummy_shorthand;
1572 
1573     while (*opts) {
1574         ret = av_opt_get_key_value(&opts, key_val_sep, pairs_sep,
1575                                    *shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,
1576                                    &parsed_key, &value);
1577         if (ret < 0) {
1578             if (ret == AVERROR(EINVAL))
1579                 av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", opts);
1580             else
1581                 av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", opts,
1582                        av_err2str(ret));
1583             return ret;
1584         }
1585         if (*opts)
1586             opts++;
1587         if (parsed_key) {
1588             key = parsed_key;
1589             while (*shorthand) /* discard all remaining shorthand */
1590                 shorthand++;
1591         } else {
1592             key = *(shorthand++);
1593         }
1594 
1595         av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);
1596         if ((ret = av_opt_set(ctx, key, value, 0)) < 0) {
1597             if (ret == AVERROR_OPTION_NOT_FOUND)
1598                 av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);
1599             av_free(value);
1600             av_free(parsed_key);
1601             return ret;
1602         }
1603 
1604         av_free(value);
1605         av_free(parsed_key);
1606         count++;
1607     }
1608     return count;
1609 }
1610 
av_opt_free(void * obj)1611 void av_opt_free(void *obj)
1612 {
1613     const AVOption *o = NULL;
1614     while ((o = av_opt_next(obj, o))) {
1615         switch (o->type) {
1616         case AV_OPT_TYPE_STRING:
1617         case AV_OPT_TYPE_BINARY:
1618             av_freep((uint8_t *)obj + o->offset);
1619             break;
1620 
1621         case AV_OPT_TYPE_DICT:
1622             av_dict_free((AVDictionary **)(((uint8_t *)obj) + o->offset));
1623             break;
1624 
1625         default:
1626             break;
1627         }
1628     }
1629 }
1630 
av_opt_set_dict2(void * obj,AVDictionary ** options,int search_flags)1631 int av_opt_set_dict2(void *obj, AVDictionary **options, int search_flags)
1632 {
1633     AVDictionaryEntry *t = NULL;
1634     AVDictionary    *tmp = NULL;
1635     int ret = 0;
1636 
1637     if (!options)
1638         return 0;
1639 
1640     while ((t = av_dict_get(*options, "", t, AV_DICT_IGNORE_SUFFIX))) {
1641         ret = av_opt_set(obj, t->key, t->value, search_flags);
1642         if (ret == AVERROR_OPTION_NOT_FOUND)
1643             ret = av_dict_set(&tmp, t->key, t->value, 0);
1644         if (ret < 0) {
1645             av_log(obj, AV_LOG_ERROR, "Error setting option %s to value %s.\n", t->key, t->value);
1646             av_dict_free(&tmp);
1647             return ret;
1648         }
1649         ret = 0;
1650     }
1651     av_dict_free(options);
1652     *options = tmp;
1653     return ret;
1654 }
1655 
av_opt_set_dict(void * obj,AVDictionary ** options)1656 int av_opt_set_dict(void *obj, AVDictionary **options)
1657 {
1658     return av_opt_set_dict2(obj, options, 0);
1659 }
1660 
av_opt_find(void * obj,const char * name,const char * unit,int opt_flags,int search_flags)1661 const AVOption *av_opt_find(void *obj, const char *name, const char *unit,
1662                             int opt_flags, int search_flags)
1663 {
1664     return av_opt_find2(obj, name, unit, opt_flags, search_flags, NULL);
1665 }
1666 
av_opt_find2(void * obj,const char * name,const char * unit,int opt_flags,int search_flags,void ** target_obj)1667 const AVOption *av_opt_find2(void *obj, const char *name, const char *unit,
1668                              int opt_flags, int search_flags, void **target_obj)
1669 {
1670     const AVClass  *c;
1671     const AVOption *o = NULL;
1672 
1673     if(!obj)
1674         return NULL;
1675 
1676     c= *(AVClass**)obj;
1677 
1678     if (!c)
1679         return NULL;
1680 
1681     if (search_flags & AV_OPT_SEARCH_CHILDREN) {
1682         if (search_flags & AV_OPT_SEARCH_FAKE_OBJ) {
1683             void *iter = NULL;
1684             const AVClass *child;
1685             while (child = av_opt_child_class_iterate(c, &iter))
1686                 if (o = av_opt_find2(&child, name, unit, opt_flags, search_flags, NULL))
1687                     return o;
1688         } else {
1689             void *child = NULL;
1690             while (child = av_opt_child_next(obj, child))
1691                 if (o = av_opt_find2(child, name, unit, opt_flags, search_flags, target_obj))
1692                     return o;
1693         }
1694     }
1695 
1696     while (o = av_opt_next(obj, o)) {
1697         if (!strcmp(o->name, name) && (o->flags & opt_flags) == opt_flags &&
1698             ((!unit && o->type != AV_OPT_TYPE_CONST) ||
1699              (unit  && o->type == AV_OPT_TYPE_CONST && o->unit && !strcmp(o->unit, unit)))) {
1700             if (target_obj) {
1701                 if (!(search_flags & AV_OPT_SEARCH_FAKE_OBJ))
1702                     *target_obj = obj;
1703                 else
1704                     *target_obj = NULL;
1705             }
1706             return o;
1707         }
1708     }
1709     return NULL;
1710 }
1711 
av_opt_child_next(void * obj,void * prev)1712 void *av_opt_child_next(void *obj, void *prev)
1713 {
1714     const AVClass *c = *(AVClass **)obj;
1715     if (c->child_next)
1716         return c->child_next(obj, prev);
1717     return NULL;
1718 }
1719 
1720 #if FF_API_CHILD_CLASS_NEXT
1721 FF_DISABLE_DEPRECATION_WARNINGS
av_opt_child_class_next(const AVClass * parent,const AVClass * prev)1722 const AVClass *av_opt_child_class_next(const AVClass *parent, const AVClass *prev)
1723 {
1724     if (parent->child_class_next)
1725         return parent->child_class_next(prev);
1726     return NULL;
1727 }
1728 FF_ENABLE_DEPRECATION_WARNINGS
1729 #endif
1730 
av_opt_child_class_iterate(const AVClass * parent,void ** iter)1731 const AVClass *av_opt_child_class_iterate(const AVClass *parent, void **iter)
1732 {
1733     if (parent->child_class_iterate)
1734         return parent->child_class_iterate(iter);
1735 #if FF_API_CHILD_CLASS_NEXT
1736 FF_DISABLE_DEPRECATION_WARNINGS
1737     if (parent->child_class_next) {
1738         *iter = parent->child_class_next(*iter);
1739         return *iter;
1740     }
1741 FF_ENABLE_DEPRECATION_WARNINGS
1742 #endif
1743     return NULL;
1744 }
1745 
av_opt_ptr(const AVClass * class,void * obj,const char * name)1746 void *av_opt_ptr(const AVClass *class, void *obj, const char *name)
1747 {
1748     const AVOption *opt= av_opt_find2(&class, name, NULL, 0, AV_OPT_SEARCH_FAKE_OBJ, NULL);
1749     if(!opt)
1750         return NULL;
1751     return (uint8_t*)obj + opt->offset;
1752 }
1753 
opt_size(enum AVOptionType type)1754 static int opt_size(enum AVOptionType type)
1755 {
1756     switch(type) {
1757     case AV_OPT_TYPE_BOOL:
1758     case AV_OPT_TYPE_INT:
1759     case AV_OPT_TYPE_FLAGS:
1760         return sizeof(int);
1761     case AV_OPT_TYPE_DURATION:
1762     case AV_OPT_TYPE_CHANNEL_LAYOUT:
1763     case AV_OPT_TYPE_INT64:
1764     case AV_OPT_TYPE_UINT64:
1765         return sizeof(int64_t);
1766     case AV_OPT_TYPE_DOUBLE:
1767         return sizeof(double);
1768     case AV_OPT_TYPE_FLOAT:
1769         return sizeof(float);
1770     case AV_OPT_TYPE_STRING:
1771         return sizeof(uint8_t*);
1772     case AV_OPT_TYPE_VIDEO_RATE:
1773     case AV_OPT_TYPE_RATIONAL:
1774         return sizeof(AVRational);
1775     case AV_OPT_TYPE_BINARY:
1776         return sizeof(uint8_t*) + sizeof(int);
1777     case AV_OPT_TYPE_IMAGE_SIZE:
1778         return sizeof(int[2]);
1779     case AV_OPT_TYPE_PIXEL_FMT:
1780         return sizeof(enum AVPixelFormat);
1781     case AV_OPT_TYPE_SAMPLE_FMT:
1782         return sizeof(enum AVSampleFormat);
1783     case AV_OPT_TYPE_COLOR:
1784         return 4;
1785     }
1786     return AVERROR(EINVAL);
1787 }
1788 
av_opt_copy(void * dst,const void * src)1789 int av_opt_copy(void *dst, const void *src)
1790 {
1791     const AVOption *o = NULL;
1792     const AVClass *c;
1793     int ret = 0;
1794 
1795     if (!src)
1796         return AVERROR(EINVAL);
1797 
1798     c = *(AVClass **)src;
1799     if (!c || c != *(AVClass **)dst)
1800         return AVERROR(EINVAL);
1801 
1802     while ((o = av_opt_next(src, o))) {
1803         void *field_dst = (uint8_t *)dst + o->offset;
1804         void *field_src = (uint8_t *)src + o->offset;
1805         uint8_t **field_dst8 = (uint8_t **)field_dst;
1806         uint8_t **field_src8 = (uint8_t **)field_src;
1807 
1808         if (o->type == AV_OPT_TYPE_STRING) {
1809             if (*field_dst8 != *field_src8)
1810                 av_freep(field_dst8);
1811             *field_dst8 = av_strdup(*field_src8);
1812             if (*field_src8 && !*field_dst8)
1813                 ret = AVERROR(ENOMEM);
1814         } else if (o->type == AV_OPT_TYPE_BINARY) {
1815             int len = *(int *)(field_src8 + 1);
1816             if (*field_dst8 != *field_src8)
1817                 av_freep(field_dst8);
1818             *field_dst8 = av_memdup(*field_src8, len);
1819             if (len && !*field_dst8) {
1820                 ret = AVERROR(ENOMEM);
1821                 len = 0;
1822             }
1823             *(int *)(field_dst8 + 1) = len;
1824         } else if (o->type == AV_OPT_TYPE_CONST) {
1825             // do nothing
1826         } else if (o->type == AV_OPT_TYPE_DICT) {
1827             AVDictionary **sdict = (AVDictionary **) field_src;
1828             AVDictionary **ddict = (AVDictionary **) field_dst;
1829             if (*sdict != *ddict)
1830                 av_dict_free(ddict);
1831             *ddict = NULL;
1832             av_dict_copy(ddict, *sdict, 0);
1833             if (av_dict_count(*sdict) != av_dict_count(*ddict))
1834                 ret = AVERROR(ENOMEM);
1835         } else {
1836             int size = opt_size(o->type);
1837             if (size < 0)
1838                 ret = size;
1839             else
1840                 memcpy(field_dst, field_src, size);
1841         }
1842     }
1843     return ret;
1844 }
1845 
av_opt_query_ranges(AVOptionRanges ** ranges_arg,void * obj,const char * key,int flags)1846 int av_opt_query_ranges(AVOptionRanges **ranges_arg, void *obj, const char *key, int flags)
1847 {
1848     int ret;
1849     const AVClass *c = *(AVClass**)obj;
1850     int (*callback)(AVOptionRanges **, void *obj, const char *key, int flags) = NULL;
1851 
1852     if (c->version > (52 << 16 | 11 << 8))
1853         callback = c->query_ranges;
1854 
1855     if (!callback)
1856         callback = av_opt_query_ranges_default;
1857 
1858     ret = callback(ranges_arg, obj, key, flags);
1859     if (ret >= 0) {
1860         if (!(flags & AV_OPT_MULTI_COMPONENT_RANGE))
1861             ret = 1;
1862         (*ranges_arg)->nb_components = ret;
1863     }
1864     return ret;
1865 }
1866 
av_opt_query_ranges_default(AVOptionRanges ** ranges_arg,void * obj,const char * key,int flags)1867 int av_opt_query_ranges_default(AVOptionRanges **ranges_arg, void *obj, const char *key, int flags)
1868 {
1869     AVOptionRanges *ranges = av_mallocz(sizeof(*ranges));
1870     AVOptionRange **range_array = av_mallocz(sizeof(void*));
1871     AVOptionRange *range = av_mallocz(sizeof(*range));
1872     const AVOption *field = av_opt_find(obj, key, NULL, 0, flags);
1873     int ret;
1874 
1875     *ranges_arg = NULL;
1876 
1877     if (!ranges || !range || !range_array || !field) {
1878         ret = AVERROR(ENOMEM);
1879         goto fail;
1880     }
1881 
1882     ranges->range = range_array;
1883     ranges->range[0] = range;
1884     ranges->nb_ranges = 1;
1885     ranges->nb_components = 1;
1886     range->is_range = 1;
1887     range->value_min = field->min;
1888     range->value_max = field->max;
1889 
1890     switch (field->type) {
1891     case AV_OPT_TYPE_BOOL:
1892     case AV_OPT_TYPE_INT:
1893     case AV_OPT_TYPE_INT64:
1894     case AV_OPT_TYPE_UINT64:
1895     case AV_OPT_TYPE_PIXEL_FMT:
1896     case AV_OPT_TYPE_SAMPLE_FMT:
1897     case AV_OPT_TYPE_FLOAT:
1898     case AV_OPT_TYPE_DOUBLE:
1899     case AV_OPT_TYPE_DURATION:
1900     case AV_OPT_TYPE_COLOR:
1901     case AV_OPT_TYPE_CHANNEL_LAYOUT:
1902         break;
1903     case AV_OPT_TYPE_STRING:
1904         range->component_min = 0;
1905         range->component_max = 0x10FFFF; // max unicode value
1906         range->value_min = -1;
1907         range->value_max = INT_MAX;
1908         break;
1909     case AV_OPT_TYPE_RATIONAL:
1910         range->component_min = INT_MIN;
1911         range->component_max = INT_MAX;
1912         break;
1913     case AV_OPT_TYPE_IMAGE_SIZE:
1914         range->component_min = 0;
1915         range->component_max = INT_MAX/128/8;
1916         range->value_min = 0;
1917         range->value_max = INT_MAX/8;
1918         break;
1919     case AV_OPT_TYPE_VIDEO_RATE:
1920         range->component_min = 1;
1921         range->component_max = INT_MAX;
1922         range->value_min = 1;
1923         range->value_max = INT_MAX;
1924         break;
1925     default:
1926         ret = AVERROR(ENOSYS);
1927         goto fail;
1928     }
1929 
1930     *ranges_arg = ranges;
1931     return 1;
1932 fail:
1933     av_free(ranges);
1934     av_free(range);
1935     av_free(range_array);
1936     return ret;
1937 }
1938 
av_opt_freep_ranges(AVOptionRanges ** rangesp)1939 void av_opt_freep_ranges(AVOptionRanges **rangesp)
1940 {
1941     int i;
1942     AVOptionRanges *ranges = *rangesp;
1943 
1944     if (!ranges)
1945         return;
1946 
1947     for (i = 0; i < ranges->nb_ranges * ranges->nb_components; i++) {
1948         AVOptionRange *range = ranges->range[i];
1949         if (range) {
1950             av_freep(&range->str);
1951             av_freep(&ranges->range[i]);
1952         }
1953     }
1954     av_freep(&ranges->range);
1955     av_freep(rangesp);
1956 }
1957 
av_opt_is_set_to_default(void * obj,const AVOption * o)1958 int av_opt_is_set_to_default(void *obj, const AVOption *o)
1959 {
1960     int64_t i64;
1961     double d, d2;
1962     float f;
1963     AVRational q;
1964     int ret, w, h;
1965     char *str;
1966     void *dst;
1967 
1968     if (!o || !obj)
1969         return AVERROR(EINVAL);
1970 
1971     dst = ((uint8_t*)obj) + o->offset;
1972 
1973     switch (o->type) {
1974     case AV_OPT_TYPE_CONST:
1975         return 1;
1976     case AV_OPT_TYPE_BOOL:
1977     case AV_OPT_TYPE_FLAGS:
1978     case AV_OPT_TYPE_PIXEL_FMT:
1979     case AV_OPT_TYPE_SAMPLE_FMT:
1980     case AV_OPT_TYPE_INT:
1981     case AV_OPT_TYPE_CHANNEL_LAYOUT:
1982     case AV_OPT_TYPE_DURATION:
1983     case AV_OPT_TYPE_INT64:
1984     case AV_OPT_TYPE_UINT64:
1985         read_number(o, dst, NULL, NULL, &i64);
1986         return o->default_val.i64 == i64;
1987     case AV_OPT_TYPE_STRING:
1988         str = *(char **)dst;
1989         if (str == o->default_val.str) //2 NULLs
1990             return 1;
1991         if (!str || !o->default_val.str) //1 NULL
1992             return 0;
1993         return !strcmp(str, o->default_val.str);
1994     case AV_OPT_TYPE_DOUBLE:
1995         read_number(o, dst, &d, NULL, NULL);
1996         return o->default_val.dbl == d;
1997     case AV_OPT_TYPE_FLOAT:
1998         read_number(o, dst, &d, NULL, NULL);
1999         f = o->default_val.dbl;
2000         d2 = f;
2001         return d2 == d;
2002     case AV_OPT_TYPE_RATIONAL:
2003         q = av_d2q(o->default_val.dbl, INT_MAX);
2004         return !av_cmp_q(*(AVRational*)dst, q);
2005     case AV_OPT_TYPE_BINARY: {
2006         struct {
2007             uint8_t *data;
2008             int size;
2009         } tmp = {0};
2010         int opt_size = *(int *)((void **)dst + 1);
2011         void *opt_ptr = *(void **)dst;
2012         if (!opt_size && (!o->default_val.str || !strlen(o->default_val.str)))
2013             return 1;
2014         if (!opt_size ||  !o->default_val.str || !strlen(o->default_val.str ))
2015             return 0;
2016         if (opt_size != strlen(o->default_val.str) / 2)
2017             return 0;
2018         ret = set_string_binary(NULL, NULL, o->default_val.str, &tmp.data);
2019         if (!ret)
2020             ret = !memcmp(opt_ptr, tmp.data, tmp.size);
2021         av_free(tmp.data);
2022         return ret;
2023     }
2024     case AV_OPT_TYPE_DICT: {
2025         AVDictionary *dict1 = NULL;
2026         AVDictionary *dict2 = *(AVDictionary **)dst;
2027         AVDictionaryEntry *en1 = NULL;
2028         AVDictionaryEntry *en2 = NULL;
2029         ret = av_dict_parse_string(&dict1, o->default_val.str, "=", ":", 0);
2030         if (ret < 0) {
2031             av_dict_free(&dict1);
2032             return ret;
2033         }
2034         do {
2035             en1 = av_dict_get(dict1, "", en1, AV_DICT_IGNORE_SUFFIX);
2036             en2 = av_dict_get(dict2, "", en2, AV_DICT_IGNORE_SUFFIX);
2037         } while (en1 && en2 && !strcmp(en1->key, en2->key) && !strcmp(en1->value, en2->value));
2038         av_dict_free(&dict1);
2039         return (!en1 && !en2);
2040     }
2041     case AV_OPT_TYPE_IMAGE_SIZE:
2042         if (!o->default_val.str || !strcmp(o->default_val.str, "none"))
2043             w = h = 0;
2044         else if ((ret = av_parse_video_size(&w, &h, o->default_val.str)) < 0)
2045             return ret;
2046         return (w == *(int *)dst) && (h == *((int *)dst+1));
2047     case AV_OPT_TYPE_VIDEO_RATE:
2048         q = (AVRational){0, 0};
2049         if (o->default_val.str) {
2050             if ((ret = av_parse_video_rate(&q, o->default_val.str)) < 0)
2051                 return ret;
2052         }
2053         return !av_cmp_q(*(AVRational*)dst, q);
2054     case AV_OPT_TYPE_COLOR: {
2055         uint8_t color[4] = {0, 0, 0, 0};
2056         if (o->default_val.str) {
2057             if ((ret = av_parse_color(color, o->default_val.str, -1, NULL)) < 0)
2058                 return ret;
2059         }
2060         return !memcmp(color, dst, sizeof(color));
2061     }
2062     default:
2063         av_log(obj, AV_LOG_WARNING, "Not supported option type: %d, option name: %s\n", o->type, o->name);
2064         break;
2065     }
2066     return AVERROR_PATCHWELCOME;
2067 }
2068 
av_opt_is_set_to_default_by_name(void * obj,const char * name,int search_flags)2069 int av_opt_is_set_to_default_by_name(void *obj, const char *name, int search_flags)
2070 {
2071     const AVOption *o;
2072     void *target;
2073     if (!obj)
2074         return AVERROR(EINVAL);
2075     o = av_opt_find2(obj, name, NULL, 0, search_flags, &target);
2076     if (!o)
2077         return AVERROR_OPTION_NOT_FOUND;
2078     return av_opt_is_set_to_default(target, o);
2079 }
2080 
av_opt_serialize(void * obj,int opt_flags,int flags,char ** buffer,const char key_val_sep,const char pairs_sep)2081 int av_opt_serialize(void *obj, int opt_flags, int flags, char **buffer,
2082                      const char key_val_sep, const char pairs_sep)
2083 {
2084     const AVOption *o = NULL;
2085     uint8_t *buf;
2086     AVBPrint bprint;
2087     int ret, cnt = 0;
2088     const char special_chars[] = {pairs_sep, key_val_sep, '\0'};
2089 
2090     if (pairs_sep == '\0' || key_val_sep == '\0' || pairs_sep == key_val_sep ||
2091         pairs_sep == '\\' || key_val_sep == '\\') {
2092         av_log(obj, AV_LOG_ERROR, "Invalid separator(s) found.");
2093         return AVERROR(EINVAL);
2094     }
2095 
2096     if (!obj || !buffer)
2097         return AVERROR(EINVAL);
2098 
2099     *buffer = NULL;
2100     av_bprint_init(&bprint, 64, AV_BPRINT_SIZE_UNLIMITED);
2101 
2102     while (o = av_opt_next(obj, o)) {
2103         if (o->type == AV_OPT_TYPE_CONST)
2104             continue;
2105         if ((flags & AV_OPT_SERIALIZE_OPT_FLAGS_EXACT) && o->flags != opt_flags)
2106             continue;
2107         else if (((o->flags & opt_flags) != opt_flags))
2108             continue;
2109         if (flags & AV_OPT_SERIALIZE_SKIP_DEFAULTS && av_opt_is_set_to_default(obj, o) > 0)
2110             continue;
2111         if ((ret = av_opt_get(obj, o->name, 0, &buf)) < 0) {
2112             av_bprint_finalize(&bprint, NULL);
2113             return ret;
2114         }
2115         if (buf) {
2116             if (cnt++)
2117                 av_bprint_append_data(&bprint, &pairs_sep, 1);
2118             av_bprint_escape(&bprint, o->name, special_chars, AV_ESCAPE_MODE_BACKSLASH, 0);
2119             av_bprint_append_data(&bprint, &key_val_sep, 1);
2120             av_bprint_escape(&bprint, buf, special_chars, AV_ESCAPE_MODE_BACKSLASH, 0);
2121             av_freep(&buf);
2122         }
2123     }
2124     ret = av_bprint_finalize(&bprint, buffer);
2125     if (ret < 0)
2126         return ret;
2127     return 0;
2128 }
2129