1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
/*
* AVOptions
* Copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
/**
* @file opt.c
* AVOptions
* @author Michael Niedermayer <michaelni@gmx.at>
*/
#include "avcodec.h"
static double av_parse_num(const char *name, char **tail){
double d;
d= strtod(name, tail);
if(*tail>name && (**tail=='/' || **tail==':'))
d/=strtod((*tail)+1, tail);
return d;
}
//FIXME order them and do a bin search
static AVOption *find_opt(void *v, const char *name){
AVClass *c= *(AVClass**)v; //FIXME silly way of storing AVClass
AVOption *o= c->option;
for(;o && o->name; o++){
if(!strcmp(o->name, name))
return o;
}
return NULL;
}
AVOption *av_next_option(void *obj, AVOption *last){
if(last && last[1].name) return ++last;
else if(last) return NULL;
else return (*(AVClass**)obj)->option;
}
static int av_set_number(void *obj, const char *name, double num, int den, int64_t intnum){
AVOption *o= find_opt(obj, name);
void *dst;
if(!o || o->offset<=0)
return -1;
if(o->max*den < num*intnum || o->min*den > num*intnum)
return -1;
dst= ((uint8_t*)obj) + o->offset;
switch(o->type){
case FF_OPT_TYPE_INT:
*(int*)dst= lrintf(num/den)*intnum;
break;
case FF_OPT_TYPE_INT64:
*(int64_t*)dst= lrintf(num/den)*intnum;
break;
case FF_OPT_TYPE_FLOAT:
*(float*)dst= num*intnum/den;
break;
case FF_OPT_TYPE_DOUBLE:
*(double*)dst= num*intnum/den;
break;
case FF_OPT_TYPE_RATIONAL:
if((int)num == num)
*(AVRational*)dst= (AVRational){num*intnum, den};
else
*(AVRational*)dst= av_d2q(num*intnum/den, 1<<24);
default:
return -1;
}
return 0;
}
//FIXME use eval.c maybe?
int av_set_string(void *obj, const char *name, const char *val){
AVOption *o= find_opt(obj, name);
if(!o || !val || o->offset<=0)
return -1;
if(o->type != FF_OPT_TYPE_STRING){
double d=0, tmp_d;
for(;;){
int i;
char buf[256], *tail;
for(i=0; i<sizeof(buf)-1 && val[i] && val[i]!='+'; i++)
buf[i]= val[i];
buf[i]=0;
val+= i;
tmp_d= av_parse_num(buf, &tail);
if(tail > buf)
d+= tmp_d;
else{
AVOption *o_named= find_opt(obj, buf);
if(o_named && o_named->type == FF_OPT_TYPE_CONST)
d+= o_named->default_val;
else if(!strcmp(buf, "default")) d+= o->default_val;
else if(!strcmp(buf, "max" )) d+= o->max;
else if(!strcmp(buf, "min" )) d+= o->min;
else return -1;
}
if(*val == '+') val++;
if(!*val)
return av_set_number(obj, name, d, 1, 1);
}
return -1;
}
memcpy(((uint8_t*)obj) + o->offset, val, sizeof(val));
return 0;
}
int av_set_double(void *obj, const char *name, double n){
return av_set_number(obj, name, n, 1, 1);
}
int av_set_q(void *obj, const char *name, AVRational n){
return av_set_number(obj, name, n.num, n.den, 1);
}
int av_set_int(void *obj, const char *name, int64_t n){
return av_set_number(obj, name, 1, 1, n);
}
const char *av_get_string(void *obj, const char *name){
AVOption *o= find_opt(obj, name);
if(!o || o->offset<=0)
return NULL;
if(o->type != FF_OPT_TYPE_STRING) //FIXME convert to string? but what about free()?
return NULL;
return (const char*)(((uint8_t*)obj) + o->offset);
}
double av_get_double(void *obj, const char *name){
AVOption *o= find_opt(obj, name);
void *dst;
if(!o || o->offset<=0)
return NAN;
dst= ((uint8_t*)obj) + o->offset;
switch(o->type){
case FF_OPT_TYPE_INT: return *(int*)dst;
case FF_OPT_TYPE_INT64: return *(int64_t*)dst; //FIXME maybe write a av_get_int64() ?
case FF_OPT_TYPE_FLOAT: return *(float*)dst;
case FF_OPT_TYPE_DOUBLE: return *(double*)dst;
case FF_OPT_TYPE_RATIONAL: return av_q2d(*(AVRational*)dst); //FIXME maybe write a av_get_q() ?
default: return NAN;
}
}
|