3 * Copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at>
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 * @author Michael Niedermayer <michaelni@gmx.at>
32 //FIXME order them and do a bin search
33 const AVOption *av_find_opt(void *v, const char *name, const char *unit, int mask, int flags){
34 AVClass *c= *(AVClass**)v; //FIXME silly way of storing AVClass
35 const AVOption *o= c->option;
37 for(;o && o->name; o++){
38 if(!strcmp(o->name, name) && (!unit || (o->unit && !strcmp(o->unit, unit))) && (o->flags & mask) == flags )
44 const AVOption *av_next_option(void *obj, const AVOption *last){
45 if(last && last[1].name) return ++last;
46 else if(last) return NULL;
47 else return (*(AVClass**)obj)->option;
50 static const AVOption *av_set_number(void *obj, const char *name, double num, int den, int64_t intnum){
51 const AVOption *o= av_find_opt(obj, name, NULL, 0, 0);
53 if(!o || o->offset<=0)
56 if(o->max*den < num*intnum || o->min*den > num*intnum) {
57 av_log(NULL, AV_LOG_ERROR, "Value %lf for parameter '%s' out of range.\n", num, name);
61 dst= ((uint8_t*)obj) + o->offset;
64 case FF_OPT_TYPE_FLAGS:
65 case FF_OPT_TYPE_INT: *(int *)dst= lrintf(num/den)*intnum; break;
66 case FF_OPT_TYPE_INT64: *(int64_t *)dst= lrintf(num/den)*intnum; break;
67 case FF_OPT_TYPE_FLOAT: *(float *)dst= num*intnum/den; break;
68 case FF_OPT_TYPE_DOUBLE:*(double *)dst= num*intnum/den; break;
69 case FF_OPT_TYPE_RATIONAL:
70 if((int)num == num) *(AVRational*)dst= (AVRational){num*intnum, den};
71 else *(AVRational*)dst= av_d2q(num*intnum/den, 1<<24);
78 static const AVOption *set_all_opt(void *v, const char *unit, double d){
79 AVClass *c= *(AVClass**)v; //FIXME silly way of storing AVClass
80 const AVOption *o= c->option;
81 const AVOption *ret=NULL;
83 for(;o && o->name; o++){
84 if(o->type != FF_OPT_TYPE_CONST && o->unit && !strcmp(o->unit, unit)){
86 if(o->type == FF_OPT_TYPE_FLAGS)
87 tmp= av_get_int(v, o->name, NULL) | (int64_t)d;
89 av_set_number(v, o->name, tmp, 1, 1);
96 static double const_values[]={
103 static const char *const_names[]={
110 const AVOption *av_set_string(void *obj, const char *name, const char *val){
111 const AVOption *o= av_find_opt(obj, name, NULL, 0, 0);
112 if(o && o->offset==0 && o->type == FF_OPT_TYPE_CONST && o->unit){
113 return set_all_opt(obj, o->unit, o->default_val);
115 if(!o || !val || o->offset<=0)
117 if(o->type != FF_OPT_TYPE_STRING){
125 if(*val == '+' || *val == '-')
128 for(i=0; i<sizeof(buf)-1 && val[i] && val[i]!='+' && val[i]!='-'; i++)
133 d = ff_eval2(buf, const_values, const_names, NULL, NULL, NULL, NULL, NULL, &error);
135 const AVOption *o_named= av_find_opt(obj, buf, o->unit, 0, 0);
136 if(o_named && o_named->type == FF_OPT_TYPE_CONST)
137 d= o_named->default_val;
138 else if(!strcmp(buf, "default")) d= o->default_val;
139 else if(!strcmp(buf, "max" )) d= o->max;
140 else if(!strcmp(buf, "min" )) d= o->min;
141 else if(!strcmp(buf, "none" )) d= 0;
142 else if(!strcmp(buf, "all" )) d= ~0;
145 av_log(NULL, AV_LOG_ERROR, "Unable to parse option value \"%s\": %s\n", val, error);
149 if(o->type == FF_OPT_TYPE_FLAGS){
150 if (cmd=='+') d= av_get_int(obj, name, NULL) | (int64_t)d;
151 else if(cmd=='-') d= av_get_int(obj, name, NULL) &~(int64_t)d;
155 av_set_number(obj, name, d, 1, 1);
162 memcpy(((uint8_t*)obj) + o->offset, &val, sizeof(val));
166 const AVOption *av_set_double(void *obj, const char *name, double n){
167 return av_set_number(obj, name, n, 1, 1);
170 const AVOption *av_set_q(void *obj, const char *name, AVRational n){
171 return av_set_number(obj, name, n.num, n.den, 1);
174 const AVOption *av_set_int(void *obj, const char *name, int64_t n){
175 return av_set_number(obj, name, 1, 1, n);
180 * @param buf a buffer which is used for returning non string values as strings, can be NULL
181 * @param buf_len allocated length in bytes of buf
183 const char *av_get_string(void *obj, const char *name, const AVOption **o_out, char *buf, int buf_len){
184 const AVOption *o= av_find_opt(obj, name, NULL, 0, 0);
186 if(!o || o->offset<=0)
188 if(o->type != FF_OPT_TYPE_STRING && (!buf || !buf_len))
191 dst= ((uint8_t*)obj) + o->offset;
195 case FF_OPT_TYPE_FLAGS: snprintf(buf, buf_len, "0x%08X",*(int *)dst);break;
196 case FF_OPT_TYPE_INT: snprintf(buf, buf_len, "%d" , *(int *)dst);break;
197 case FF_OPT_TYPE_INT64: snprintf(buf, buf_len, "%"PRId64, *(int64_t*)dst);break;
198 case FF_OPT_TYPE_FLOAT: snprintf(buf, buf_len, "%f" , *(float *)dst);break;
199 case FF_OPT_TYPE_DOUBLE: snprintf(buf, buf_len, "%f" , *(double *)dst);break;
200 case FF_OPT_TYPE_RATIONAL: snprintf(buf, buf_len, "%d/%d", ((AVRational*)dst)->num, ((AVRational*)dst)->den);break;
201 case FF_OPT_TYPE_STRING: return *(void**)dst;
202 default: return NULL;
207 static int av_get_number(void *obj, const char *name, const AVOption **o_out, double *num, int *den, int64_t *intnum){
208 const AVOption *o= av_find_opt(obj, name, NULL, 0, 0);
210 if(!o || o->offset<=0)
213 dst= ((uint8_t*)obj) + o->offset;
218 case FF_OPT_TYPE_FLAGS:
219 case FF_OPT_TYPE_INT: *intnum= *(int *)dst;return 0;
220 case FF_OPT_TYPE_INT64: *intnum= *(int64_t*)dst;return 0;
221 case FF_OPT_TYPE_FLOAT: *num= *(float *)dst;return 0;
222 case FF_OPT_TYPE_DOUBLE: *num= *(double *)dst;return 0;
223 case FF_OPT_TYPE_RATIONAL: *intnum= ((AVRational*)dst)->num;
224 *den = ((AVRational*)dst)->den;
232 double av_get_double(void *obj, const char *name, const AVOption **o_out){
237 av_get_number(obj, name, o_out, &num, &den, &intnum);
238 return num*intnum/den;
241 AVRational av_get_q(void *obj, const char *name, const AVOption **o_out){
246 av_get_number(obj, name, o_out, &num, &den, &intnum);
247 if(num == 1.0 && (int)intnum == intnum)
248 return (AVRational){intnum, den};
250 return av_d2q(num*intnum/den, 1<<24);
253 int64_t av_get_int(void *obj, const char *name, const AVOption **o_out){
258 av_get_number(obj, name, o_out, &num, &den, &intnum);
259 return num*intnum/den;
262 static void opt_list(void *obj, void *av_log_obj, const char *unit)
264 const AVOption *opt=NULL;
266 while((opt= av_next_option(obj, opt))){
267 if(!(opt->flags & (AV_OPT_FLAG_ENCODING_PARAM|AV_OPT_FLAG_DECODING_PARAM)))
270 /* Don't print CONST's on level one.
271 * Don't print anything but CONST's on level two.
272 * Only print items from the requested unit.
274 if (!unit && opt->type==FF_OPT_TYPE_CONST)
276 else if (unit && opt->type!=FF_OPT_TYPE_CONST)
278 else if (unit && opt->type==FF_OPT_TYPE_CONST && strcmp(unit, opt->unit))
280 else if (unit && opt->type == FF_OPT_TYPE_CONST)
281 av_log(av_log_obj, AV_LOG_INFO, " %-15s ", opt->name);
283 av_log(av_log_obj, AV_LOG_INFO, "-%-17s ", opt->name);
287 case FF_OPT_TYPE_FLAGS:
288 av_log( av_log_obj, AV_LOG_INFO, "%-7s ", "<flags>" );
290 case FF_OPT_TYPE_INT:
291 av_log( av_log_obj, AV_LOG_INFO, "%-7s ", "<int>" );
293 case FF_OPT_TYPE_INT64:
294 av_log( av_log_obj, AV_LOG_INFO, "%-7s ", "<int64>" );
296 case FF_OPT_TYPE_DOUBLE:
297 av_log( av_log_obj, AV_LOG_INFO, "%-7s ", "<double>" );
299 case FF_OPT_TYPE_FLOAT:
300 av_log( av_log_obj, AV_LOG_INFO, "%-7s ", "<float>" );
302 case FF_OPT_TYPE_STRING:
303 av_log( av_log_obj, AV_LOG_INFO, "%-7s ", "<string>" );
305 case FF_OPT_TYPE_RATIONAL:
306 av_log( av_log_obj, AV_LOG_INFO, "%-7s ", "<rational>" );
308 case FF_OPT_TYPE_CONST:
310 av_log( av_log_obj, AV_LOG_INFO, "%-7s ", "" );
313 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_ENCODING_PARAM) ? 'E' : '.');
314 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_DECODING_PARAM) ? 'D' : '.');
315 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_VIDEO_PARAM ) ? 'V' : '.');
316 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_AUDIO_PARAM ) ? 'A' : '.');
317 av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_SUBTITLE_PARAM) ? 'S' : '.');
320 av_log(av_log_obj, AV_LOG_INFO, " %s", opt->help);
321 av_log(av_log_obj, AV_LOG_INFO, "\n");
322 if (opt->unit && opt->type != FF_OPT_TYPE_CONST) {
323 opt_list(obj, av_log_obj, opt->unit);
328 int av_opt_show(void *obj, void *av_log_obj){
332 av_log(av_log_obj, AV_LOG_INFO, "%s AVOptions:\n", (*(AVClass**)obj)->class_name);
334 opt_list(obj, av_log_obj, NULL);
339 /** Set the values of the AVCodecContext or AVFormatContext structure.
340 * They are set to the defaults specified in the according AVOption options
341 * array default_val field.
343 * @param s AVCodecContext or AVFormatContext for which the defaults will be set
345 void av_opt_set_defaults2(void *s, int mask, int flags)
347 const AVOption *opt = NULL;
348 while ((opt = av_next_option(s, opt)) != NULL) {
349 if((opt->flags & mask) != flags)
352 case FF_OPT_TYPE_CONST:
353 /* Nothing to be done here */
355 case FF_OPT_TYPE_FLAGS:
356 case FF_OPT_TYPE_INT: {
358 val = opt->default_val;
359 av_set_int(s, opt->name, val);
362 case FF_OPT_TYPE_FLOAT: {
364 val = opt->default_val;
365 av_set_double(s, opt->name, val);
368 case FF_OPT_TYPE_RATIONAL: {
370 val = av_d2q(opt->default_val, INT_MAX);
371 av_set_q(s, opt->name, val);
374 case FF_OPT_TYPE_STRING:
375 /* Cannot set default for string as default_val is of type * double */
378 av_log(s, AV_LOG_DEBUG, "AVOption type %d of option %s not implemented yet\n", opt->type, opt->name);
383 void av_opt_set_defaults(void *s){
384 av_opt_set_defaults2(s, 0, 0);