ffmpeg / libavcodec / opt.c @ a367be1e
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/*
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* AVOptions
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* Copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file libavcodec/opt.c
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* AVOptions
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* @author Michael Niedermayer <michaelni@gmx.at>
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*/
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#include "avcodec.h" |
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#include "opt.h" |
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#include "eval.h" |
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|
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//FIXME order them and do a bin search
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const AVOption *av_find_opt(void *v, const char *name, const char *unit, int mask, int flags){ |
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AVClass *c= *(AVClass**)v; //FIXME silly way of storing AVClass
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const AVOption *o= c->option;
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|
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for(;o && o->name; o++){
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if(!strcmp(o->name, name) && (!unit || (o->unit && !strcmp(o->unit, unit))) && (o->flags & mask) == flags )
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return o;
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} |
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return NULL; |
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} |
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|
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const AVOption *av_next_option(void *obj, const AVOption *last){ |
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if(last && last[1].name) return ++last; |
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else if(last) return NULL; |
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else return (*(AVClass**)obj)->option; |
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} |
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|
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static int av_set_number2(void *obj, const char *name, double num, int den, int64_t intnum, const AVOption **o_out){ |
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const AVOption *o= av_find_opt(obj, name, NULL, 0, 0); |
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void *dst;
|
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if(o_out)
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*o_out= o; |
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if(!o || o->offset<=0) |
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return AVERROR(ENOENT);
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|
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if(o->max*den < num*intnum || o->min*den > num*intnum) {
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av_log(obj, AV_LOG_ERROR, "Value %lf for parameter '%s' out of range\n", num, name);
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return AVERROR(ERANGE);
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} |
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|
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dst= ((uint8_t*)obj) + o->offset; |
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|
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switch(o->type){
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case FF_OPT_TYPE_FLAGS:
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case FF_OPT_TYPE_INT: *(int *)dst= llrint(num/den)*intnum; break; |
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case FF_OPT_TYPE_INT64: *(int64_t *)dst= llrint(num/den)*intnum; break; |
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case FF_OPT_TYPE_FLOAT: *(float *)dst= num*intnum/den; break; |
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case FF_OPT_TYPE_DOUBLE:*(double *)dst= num*intnum/den; break; |
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case FF_OPT_TYPE_RATIONAL:
|
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if((int)num == num) *(AVRational*)dst= (AVRational){num*intnum, den}; |
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else *(AVRational*)dst= av_d2q(num*intnum/den, 1<<24); |
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break;
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default:
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return AVERROR(EINVAL);
|
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} |
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return 0; |
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} |
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|
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static const AVOption *av_set_number(void *obj, const char *name, double num, int den, int64_t intnum){ |
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const AVOption *o = NULL; |
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if (av_set_number2(obj, name, num, den, intnum, &o) < 0) |
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return NULL; |
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else
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return o;
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} |
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|
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static const double const_values[]={ |
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M_PI, |
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M_E, |
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FF_QP2LAMBDA, |
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0
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}; |
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|
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static const char * const const_names[]={ |
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"PI",
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"E",
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"QP2LAMBDA",
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0
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}; |
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|
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static int hexchar2int(char c) { |
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if (c >= '0' && c <= '9') return c - '0'; |
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if (c >= 'a' && c <= 'f') return c - 'a' + 10; |
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if (c >= 'A' && c <= 'F') return c - 'A' + 10; |
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return -1; |
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} |
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|
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int av_set_string3(void *obj, const char *name, const char *val, int alloc, const AVOption **o_out){ |
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int ret;
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const AVOption *o= av_find_opt(obj, name, NULL, 0, 0); |
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if (o_out)
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*o_out = o; |
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if(!o)
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return AVERROR(ENOENT);
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if(!val || o->offset<=0) |
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return AVERROR(EINVAL);
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|
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if(o->type == FF_OPT_TYPE_BINARY){
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uint8_t **dst = (uint8_t **)(((uint8_t*)obj) + o->offset); |
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int *lendst = (int *)(dst + 1); |
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uint8_t *bin, *ptr; |
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int len = strlen(val);
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av_freep(dst); |
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*lendst = 0;
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if (len & 1) return AVERROR(EINVAL); |
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len /= 2;
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ptr = bin = av_malloc(len); |
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while (*val) {
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int a = hexchar2int(*val++);
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int b = hexchar2int(*val++);
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if (a < 0 || b < 0) { |
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av_free(bin); |
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return AVERROR(EINVAL);
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} |
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*ptr++ = (a << 4) | b;
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} |
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*dst = bin; |
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*lendst = len; |
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return 0; |
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} |
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if(o->type != FF_OPT_TYPE_STRING){
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int notfirst=0; |
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for(;;){
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int i;
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char buf[256]; |
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int cmd=0; |
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double d;
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const char *error = NULL; |
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|
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if(*val == '+' || *val == '-') |
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cmd= *(val++); |
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|
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for(i=0; i<sizeof(buf)-1 && val[i] && val[i]!='+' && val[i]!='-'; i++) |
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buf[i]= val[i]; |
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buf[i]=0;
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|
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d = ff_parse_and_eval_expr(buf, const_values, const_names, NULL, NULL, NULL, NULL, NULL, &error); |
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if(isnan(d)) {
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const AVOption *o_named= av_find_opt(obj, buf, o->unit, 0, 0); |
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if(o_named && o_named->type == FF_OPT_TYPE_CONST)
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d= o_named->default_val; |
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else if(!strcmp(buf, "default")) d= o->default_val; |
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else if(!strcmp(buf, "max" )) d= o->max; |
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else if(!strcmp(buf, "min" )) d= o->min; |
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else if(!strcmp(buf, "none" )) d= 0; |
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else if(!strcmp(buf, "all" )) d= ~0; |
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else {
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if (error)
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av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\": %s\n", val, error);
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return AVERROR(EINVAL);
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} |
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} |
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if(o->type == FF_OPT_TYPE_FLAGS){
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if (cmd=='+') d= av_get_int(obj, name, NULL) | (int64_t)d; |
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else if(cmd=='-') d= av_get_int(obj, name, NULL) &~(int64_t)d; |
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}else{
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if (cmd=='+') d= notfirst*av_get_double(obj, name, NULL) + d; |
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else if(cmd=='-') d= notfirst*av_get_double(obj, name, NULL) - d; |
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} |
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|
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if ((ret = av_set_number2(obj, name, d, 1, 1, o_out)) < 0) |
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return ret;
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val+= i; |
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if(!*val)
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return 0; |
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notfirst=1;
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} |
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return AVERROR(EINVAL);
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} |
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|
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if(alloc){
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av_free(*(void**)(((uint8_t*)obj) + o->offset));
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val= av_strdup(val); |
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} |
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memcpy(((uint8_t*)obj) + o->offset, &val, sizeof(val));
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return 0; |
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} |
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#if LIBAVCODEC_VERSION_MAJOR < 53 |
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const AVOption *av_set_string2(void *obj, const char *name, const char *val, int alloc){ |
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const AVOption *o;
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if (av_set_string3(obj, name, val, alloc, &o) < 0) |
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return NULL; |
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return o;
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} |
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const AVOption *av_set_string(void *obj, const char *name, const char *val){ |
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const AVOption *o;
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if (av_set_string3(obj, name, val, 0, &o) < 0) |
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return NULL; |
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return o;
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} |
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#endif
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const AVOption *av_set_double(void *obj, const char *name, double n){ |
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return av_set_number(obj, name, n, 1, 1); |
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} |
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const AVOption *av_set_q(void *obj, const char *name, AVRational n){ |
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return av_set_number(obj, name, n.num, n.den, 1); |
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} |
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|
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const AVOption *av_set_int(void *obj, const char *name, int64_t n){ |
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return av_set_number(obj, name, 1, 1, n); |
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} |
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|
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/**
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*
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* @param buf a buffer which is used for returning non string values as strings, can be NULL
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* @param buf_len allocated length in bytes of buf
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*/
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const char *av_get_string(void *obj, const char *name, const AVOption **o_out, char *buf, int buf_len){ |
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const AVOption *o= av_find_opt(obj, name, NULL, 0, 0); |
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void *dst;
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uint8_t *bin; |
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int len, i;
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if(!o || o->offset<=0) |
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return NULL; |
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if(o->type != FF_OPT_TYPE_STRING && (!buf || !buf_len))
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return NULL; |
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dst= ((uint8_t*)obj) + o->offset; |
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if(o_out) *o_out= o;
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|
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switch(o->type){
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case FF_OPT_TYPE_FLAGS: snprintf(buf, buf_len, "0x%08X",*(int *)dst);break; |
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case FF_OPT_TYPE_INT: snprintf(buf, buf_len, "%d" , *(int *)dst);break; |
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case FF_OPT_TYPE_INT64: snprintf(buf, buf_len, "%"PRId64, *(int64_t*)dst);break; |
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case FF_OPT_TYPE_FLOAT: snprintf(buf, buf_len, "%f" , *(float *)dst);break; |
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case FF_OPT_TYPE_DOUBLE: snprintf(buf, buf_len, "%f" , *(double *)dst);break; |
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case FF_OPT_TYPE_RATIONAL: snprintf(buf, buf_len, "%d/%d", ((AVRational*)dst)->num, ((AVRational*)dst)->den);break; |
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case FF_OPT_TYPE_STRING: return *(void**)dst; |
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case FF_OPT_TYPE_BINARY:
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len = *(int*)(((uint8_t *)dst) + sizeof(uint8_t *)); |
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if(len >= (buf_len + 1)/2) return NULL; |
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bin = *(uint8_t**)dst; |
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for(i = 0; i < len; i++) snprintf(buf + i*2, 3, "%02X", bin[i]); |
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break;
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default: return NULL; |
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} |
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return buf;
|
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} |
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|
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static int av_get_number(void *obj, const char *name, const AVOption **o_out, double *num, int *den, int64_t *intnum){ |
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const AVOption *o= av_find_opt(obj, name, NULL, 0, 0); |
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void *dst;
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if(!o || o->offset<=0) |
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goto error;
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dst= ((uint8_t*)obj) + o->offset; |
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if(o_out) *o_out= o;
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switch(o->type){
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case FF_OPT_TYPE_FLAGS: *intnum= *(unsigned int*)dst;return 0; |
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case FF_OPT_TYPE_INT: *intnum= *(int *)dst;return 0; |
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case FF_OPT_TYPE_INT64: *intnum= *(int64_t*)dst;return 0; |
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case FF_OPT_TYPE_FLOAT: *num= *(float *)dst;return 0; |
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case FF_OPT_TYPE_DOUBLE: *num= *(double *)dst;return 0; |
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case FF_OPT_TYPE_RATIONAL: *intnum= ((AVRational*)dst)->num;
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*den = ((AVRational*)dst)->den; |
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return 0; |
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} |
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error:
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*den=*intnum=0;
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return -1; |
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} |
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|
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double av_get_double(void *obj, const char *name, const AVOption **o_out){ |
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int64_t intnum=1;
|
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double num=1; |
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int den=1; |
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|
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av_get_number(obj, name, o_out, &num, &den, &intnum); |
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return num*intnum/den;
|
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} |
| 300 |
|
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AVRational av_get_q(void *obj, const char *name, const AVOption **o_out){ |
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int64_t intnum=1;
|
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double num=1; |
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int den=1; |
| 305 |
|
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av_get_number(obj, name, o_out, &num, &den, &intnum); |
| 307 |
if(num == 1.0 && (int)intnum == intnum) |
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return (AVRational){intnum, den};
|
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else
|
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return av_d2q(num*intnum/den, 1<<24); |
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} |
| 312 |
|
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int64_t av_get_int(void *obj, const char *name, const AVOption **o_out){ |
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int64_t intnum=1;
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double num=1; |
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int den=1; |
| 317 |
|
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av_get_number(obj, name, o_out, &num, &den, &intnum); |
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return num*intnum/den;
|
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} |
| 321 |
|
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static void opt_list(void *obj, void *av_log_obj, const char *unit) |
| 323 |
{
|
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const AVOption *opt=NULL; |
| 325 |
|
| 326 |
while((opt= av_next_option(obj, opt))){
|
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if(!(opt->flags & (AV_OPT_FLAG_ENCODING_PARAM|AV_OPT_FLAG_DECODING_PARAM)))
|
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continue;
|
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|
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/* Don't print CONST's on level one.
|
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* Don't print anything but CONST's on level two.
|
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* Only print items from the requested unit.
|
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*/
|
| 334 |
if (!unit && opt->type==FF_OPT_TYPE_CONST)
|
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continue;
|
| 336 |
else if (unit && opt->type!=FF_OPT_TYPE_CONST) |
| 337 |
continue;
|
| 338 |
else if (unit && opt->type==FF_OPT_TYPE_CONST && strcmp(unit, opt->unit)) |
| 339 |
continue;
|
| 340 |
else if (unit && opt->type == FF_OPT_TYPE_CONST) |
| 341 |
av_log(av_log_obj, AV_LOG_INFO, " %-15s ", opt->name);
|
| 342 |
else
|
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av_log(av_log_obj, AV_LOG_INFO, "-%-17s ", opt->name);
|
| 344 |
|
| 345 |
switch( opt->type )
|
| 346 |
{
|
| 347 |
case FF_OPT_TYPE_FLAGS:
|
| 348 |
av_log( av_log_obj, AV_LOG_INFO, "%-7s ", "<flags>" ); |
| 349 |
break;
|
| 350 |
case FF_OPT_TYPE_INT:
|
| 351 |
av_log( av_log_obj, AV_LOG_INFO, "%-7s ", "<int>" ); |
| 352 |
break;
|
| 353 |
case FF_OPT_TYPE_INT64:
|
| 354 |
av_log( av_log_obj, AV_LOG_INFO, "%-7s ", "<int64>" ); |
| 355 |
break;
|
| 356 |
case FF_OPT_TYPE_DOUBLE:
|
| 357 |
av_log( av_log_obj, AV_LOG_INFO, "%-7s ", "<double>" ); |
| 358 |
break;
|
| 359 |
case FF_OPT_TYPE_FLOAT:
|
| 360 |
av_log( av_log_obj, AV_LOG_INFO, "%-7s ", "<float>" ); |
| 361 |
break;
|
| 362 |
case FF_OPT_TYPE_STRING:
|
| 363 |
av_log( av_log_obj, AV_LOG_INFO, "%-7s ", "<string>" ); |
| 364 |
break;
|
| 365 |
case FF_OPT_TYPE_RATIONAL:
|
| 366 |
av_log( av_log_obj, AV_LOG_INFO, "%-7s ", "<rational>" ); |
| 367 |
break;
|
| 368 |
case FF_OPT_TYPE_BINARY:
|
| 369 |
av_log( av_log_obj, AV_LOG_INFO, "%-7s ", "<binary>" ); |
| 370 |
break;
|
| 371 |
case FF_OPT_TYPE_CONST:
|
| 372 |
default:
|
| 373 |
av_log( av_log_obj, AV_LOG_INFO, "%-7s ", "" ); |
| 374 |
break;
|
| 375 |
} |
| 376 |
av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_ENCODING_PARAM) ? 'E' : '.'); |
| 377 |
av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_DECODING_PARAM) ? 'D' : '.'); |
| 378 |
av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_VIDEO_PARAM ) ? 'V' : '.'); |
| 379 |
av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_AUDIO_PARAM ) ? 'A' : '.'); |
| 380 |
av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_SUBTITLE_PARAM) ? 'S' : '.'); |
| 381 |
|
| 382 |
if(opt->help)
|
| 383 |
av_log(av_log_obj, AV_LOG_INFO, " %s", opt->help);
|
| 384 |
av_log(av_log_obj, AV_LOG_INFO, "\n");
|
| 385 |
if (opt->unit && opt->type != FF_OPT_TYPE_CONST) {
|
| 386 |
opt_list(obj, av_log_obj, opt->unit); |
| 387 |
} |
| 388 |
} |
| 389 |
} |
| 390 |
|
| 391 |
int av_opt_show(void *obj, void *av_log_obj){ |
| 392 |
if(!obj)
|
| 393 |
return -1; |
| 394 |
|
| 395 |
av_log(av_log_obj, AV_LOG_INFO, "%s AVOptions:\n", (*(AVClass**)obj)->class_name);
|
| 396 |
|
| 397 |
opt_list(obj, av_log_obj, NULL);
|
| 398 |
|
| 399 |
return 0; |
| 400 |
} |
| 401 |
|
| 402 |
/** Set the values of the AVCodecContext or AVFormatContext structure.
|
| 403 |
* They are set to the defaults specified in the according AVOption options
|
| 404 |
* array default_val field.
|
| 405 |
*
|
| 406 |
* @param s AVCodecContext or AVFormatContext for which the defaults will be set
|
| 407 |
*/
|
| 408 |
void av_opt_set_defaults2(void *s, int mask, int flags) |
| 409 |
{
|
| 410 |
const AVOption *opt = NULL; |
| 411 |
while ((opt = av_next_option(s, opt)) != NULL) { |
| 412 |
if((opt->flags & mask) != flags)
|
| 413 |
continue;
|
| 414 |
switch(opt->type) {
|
| 415 |
case FF_OPT_TYPE_CONST:
|
| 416 |
/* Nothing to be done here */
|
| 417 |
break;
|
| 418 |
case FF_OPT_TYPE_FLAGS:
|
| 419 |
case FF_OPT_TYPE_INT: {
|
| 420 |
int val;
|
| 421 |
val = opt->default_val; |
| 422 |
av_set_int(s, opt->name, val); |
| 423 |
} |
| 424 |
break;
|
| 425 |
case FF_OPT_TYPE_INT64:
|
| 426 |
if((double)(opt->default_val+0.6) == opt->default_val) |
| 427 |
av_log(s, AV_LOG_DEBUG, "loss of precision in default of %s\n", opt->name);
|
| 428 |
av_set_int(s, opt->name, opt->default_val); |
| 429 |
break;
|
| 430 |
case FF_OPT_TYPE_FLOAT: {
|
| 431 |
double val;
|
| 432 |
val = opt->default_val; |
| 433 |
av_set_double(s, opt->name, val); |
| 434 |
} |
| 435 |
break;
|
| 436 |
case FF_OPT_TYPE_RATIONAL: {
|
| 437 |
AVRational val; |
| 438 |
val = av_d2q(opt->default_val, INT_MAX); |
| 439 |
av_set_q(s, opt->name, val); |
| 440 |
} |
| 441 |
break;
|
| 442 |
case FF_OPT_TYPE_STRING:
|
| 443 |
case FF_OPT_TYPE_BINARY:
|
| 444 |
/* Cannot set default for string as default_val is of type * double */
|
| 445 |
break;
|
| 446 |
default:
|
| 447 |
av_log(s, AV_LOG_DEBUG, "AVOption type %d of option %s not implemented yet\n", opt->type, opt->name);
|
| 448 |
} |
| 449 |
} |
| 450 |
} |
| 451 |
|
| 452 |
void av_opt_set_defaults(void *s){ |
| 453 |
av_opt_set_defaults2(s, 0, 0); |
| 454 |
} |
| 455 |
|