mirror of
https://gitee.com/openharmony/third_party_ffmpeg
synced 2024-11-27 21:20:41 +00:00
88d6903e23
Patch by Antoine Cellerier < dionoea AaH via pOiS ecp PoIs fr > Original thread: Date: Nov 1, 2005 7:41 PM Subject: [Ffmpeg-devel] libavcodec help Originally committed as revision 5054 to svn://svn.ffmpeg.org/ffmpeg/trunk
302 lines
9.9 KiB
C
302 lines
9.9 KiB
C
/*
|
|
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
*/
|
|
|
|
/**
|
|
* @file opt.c
|
|
* AVOptions
|
|
* @author Michael Niedermayer <michaelni@gmx.at>
|
|
*/
|
|
|
|
#include "avcodec.h"
|
|
#include "opt.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, const char *unit){
|
|
AVClass *c= *(AVClass**)v; //FIXME silly way of storing AVClass
|
|
AVOption *o= c->option;
|
|
|
|
for(;o && o->name; o++){
|
|
if(!strcmp(o->name, name) && (!unit || !strcmp(o->unit, unit)) )
|
|
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 AVOption *av_set_number(void *obj, const char *name, double num, int den, int64_t intnum){
|
|
AVOption *o= find_opt(obj, name, NULL);
|
|
void *dst;
|
|
if(!o || o->offset<=0)
|
|
return NULL;
|
|
|
|
if(o->max*den < num*intnum || o->min*den > num*intnum)
|
|
return NULL;
|
|
|
|
dst= ((uint8_t*)obj) + o->offset;
|
|
|
|
switch(o->type){
|
|
case FF_OPT_TYPE_FLAGS:
|
|
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 NULL;
|
|
}
|
|
return o;
|
|
}
|
|
|
|
static AVOption *set_all_opt(void *v, const char *unit, double d){
|
|
AVClass *c= *(AVClass**)v; //FIXME silly way of storing AVClass
|
|
AVOption *o= c->option;
|
|
AVOption *ret=NULL;
|
|
|
|
for(;o && o->name; o++){
|
|
if(o->type != FF_OPT_TYPE_CONST && o->unit && !strcmp(o->unit, unit)){
|
|
double tmp= d;
|
|
if(o->type == FF_OPT_TYPE_FLAGS)
|
|
tmp= av_get_int(v, o->name, NULL) | (int64_t)d;
|
|
|
|
av_set_number(v, o->name, tmp, 1, 1);
|
|
ret= o;
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
//FIXME use eval.c maybe?
|
|
AVOption *av_set_string(void *obj, const char *name, const char *val){
|
|
AVOption *o= find_opt(obj, name, NULL);
|
|
if(o && o->offset==0 && o->type == FF_OPT_TYPE_CONST && o->unit){
|
|
return set_all_opt(obj, o->unit, o->default_val);
|
|
}
|
|
if(!o || !val || o->offset<=0)
|
|
return NULL;
|
|
if(o->type != FF_OPT_TYPE_STRING){
|
|
for(;;){
|
|
int i;
|
|
char buf[256], *tail;
|
|
int cmd=0;
|
|
double d;
|
|
|
|
if(*val == '+' || *val == '-')
|
|
cmd= *(val++);
|
|
|
|
for(i=0; i<sizeof(buf)-1 && val[i] && val[i]!='+' && val[i]!='-'; i++)
|
|
buf[i]= val[i];
|
|
buf[i]=0;
|
|
val+= i;
|
|
|
|
d= av_parse_num(buf, &tail);
|
|
if(tail <= buf){
|
|
AVOption *o_named= find_opt(obj, buf, o->unit);
|
|
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 NULL;
|
|
}
|
|
if(o->type == FF_OPT_TYPE_FLAGS){
|
|
if (cmd=='+') d= av_get_int(obj, name, NULL) | (int64_t)d;
|
|
else if(cmd=='-') d= av_get_int(obj, name, NULL) &~(int64_t)d;
|
|
}else if(cmd=='-')
|
|
d= -d;
|
|
|
|
av_set_number(obj, name, d, 1, 1);
|
|
if(!*val)
|
|
return o;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
memcpy(((uint8_t*)obj) + o->offset, val, sizeof(val));
|
|
return o;
|
|
}
|
|
|
|
AVOption *av_set_double(void *obj, const char *name, double n){
|
|
return av_set_number(obj, name, n, 1, 1);
|
|
}
|
|
|
|
AVOption *av_set_q(void *obj, const char *name, AVRational n){
|
|
return av_set_number(obj, name, n.num, n.den, 1);
|
|
}
|
|
|
|
AVOption *av_set_int(void *obj, const char *name, int64_t n){
|
|
return av_set_number(obj, name, 1, 1, n);
|
|
}
|
|
|
|
/**
|
|
*
|
|
* @param buf a buffer which is used for returning non string values as strings, can be NULL
|
|
* @param buf_len allocated length in bytes of buf
|
|
*/
|
|
const char *av_get_string(void *obj, const char *name, AVOption **o_out, char *buf, int buf_len){
|
|
AVOption *o= find_opt(obj, name, NULL);
|
|
void *dst;
|
|
if(!o || o->offset<=0)
|
|
return NULL;
|
|
if(o->type != FF_OPT_TYPE_STRING && (!buf || !buf_len))
|
|
return NULL;
|
|
|
|
dst= ((uint8_t*)obj) + o->offset;
|
|
if(o_out) *o_out= o;
|
|
|
|
if(o->type == FF_OPT_TYPE_STRING)
|
|
return dst;
|
|
|
|
switch(o->type){
|
|
case FF_OPT_TYPE_FLAGS: snprintf(buf, buf_len, "0x%08X",*(int *)dst);break;
|
|
case FF_OPT_TYPE_INT: snprintf(buf, buf_len, "%d" , *(int *)dst);break;
|
|
case FF_OPT_TYPE_INT64: snprintf(buf, buf_len, "%"PRId64, *(int64_t*)dst);break;
|
|
case FF_OPT_TYPE_FLOAT: snprintf(buf, buf_len, "%f" , *(float *)dst);break;
|
|
case FF_OPT_TYPE_DOUBLE: snprintf(buf, buf_len, "%f" , *(double *)dst);break;
|
|
case FF_OPT_TYPE_RATIONAL: snprintf(buf, buf_len, "%d/%d", ((AVRational*)dst)->num, ((AVRational*)dst)->den);break;
|
|
default: return NULL;
|
|
}
|
|
return buf;
|
|
}
|
|
|
|
static int av_get_number(void *obj, const char *name, AVOption **o_out, double *num, int *den, int64_t *intnum){
|
|
AVOption *o= find_opt(obj, name, NULL);
|
|
void *dst;
|
|
if(!o || o->offset<=0)
|
|
goto error;
|
|
|
|
dst= ((uint8_t*)obj) + o->offset;
|
|
|
|
if(o_out) *o_out= o;
|
|
|
|
switch(o->type){
|
|
case FF_OPT_TYPE_FLAGS:
|
|
case FF_OPT_TYPE_INT: *intnum= *(int *)dst;return 0;
|
|
case FF_OPT_TYPE_INT64: *intnum= *(int64_t*)dst;return 0;
|
|
case FF_OPT_TYPE_FLOAT: *num= *(float *)dst;return 0;
|
|
case FF_OPT_TYPE_DOUBLE: *num= *(double *)dst;return 0;
|
|
case FF_OPT_TYPE_RATIONAL: *intnum= ((AVRational*)dst)->num;
|
|
*den = ((AVRational*)dst)->den;
|
|
return 0;
|
|
}
|
|
error:
|
|
*den=*intnum=0;
|
|
return -1;
|
|
}
|
|
|
|
double av_get_double(void *obj, const char *name, AVOption **o_out){
|
|
int64_t intnum=1;
|
|
double num=1;
|
|
int den=1;
|
|
|
|
av_get_number(obj, name, o_out, &num, &den, &intnum);
|
|
return num*intnum/den;
|
|
}
|
|
|
|
AVRational av_get_q(void *obj, const char *name, AVOption **o_out){
|
|
int64_t intnum=1;
|
|
double num=1;
|
|
int den=1;
|
|
|
|
av_get_number(obj, name, o_out, &num, &den, &intnum);
|
|
if(num == 1.0 && (int)intnum == intnum)
|
|
return (AVRational){intnum, den};
|
|
else
|
|
return av_d2q(num*intnum/den, 1<<24);
|
|
}
|
|
|
|
int64_t av_get_int(void *obj, const char *name, AVOption **o_out){
|
|
int64_t intnum=1;
|
|
double num=1;
|
|
int den=1;
|
|
|
|
av_get_number(obj, name, o_out, &num, &den, &intnum);
|
|
return num*intnum/den;
|
|
}
|
|
|
|
int av_opt_show(void *obj, void *av_log_obj){
|
|
AVOption *opt=NULL;
|
|
|
|
if(!obj)
|
|
return -1;
|
|
|
|
av_log(av_log_obj, AV_LOG_INFO, "%s AVOptions:\n", (*(AVClass**)obj)->class_name);
|
|
|
|
while((opt= av_next_option(obj, opt))){
|
|
if(!(opt->flags & (AV_OPT_FLAG_ENCODING_PARAM|AV_OPT_FLAG_DECODING_PARAM)))
|
|
continue;
|
|
|
|
av_log(av_log_obj, AV_LOG_INFO, "-%-17s ", opt->name);
|
|
|
|
switch( opt->type )
|
|
{
|
|
case FF_OPT_TYPE_FLAGS:
|
|
av_log( av_log_obj, AV_LOG_INFO, "%-7s ", "<flags>" );
|
|
break;
|
|
case FF_OPT_TYPE_INT:
|
|
av_log( av_log_obj, AV_LOG_INFO, "%-7s ", "<int>" );
|
|
break;
|
|
case FF_OPT_TYPE_INT64:
|
|
av_log( av_log_obj, AV_LOG_INFO, "%-7s ", "<int64>" );
|
|
break;
|
|
case FF_OPT_TYPE_DOUBLE:
|
|
av_log( av_log_obj, AV_LOG_INFO, "%-7s ", "<double>" );
|
|
break;
|
|
case FF_OPT_TYPE_FLOAT:
|
|
av_log( av_log_obj, AV_LOG_INFO, "%-7s ", "<float>" );
|
|
break;
|
|
case FF_OPT_TYPE_STRING:
|
|
av_log( av_log_obj, AV_LOG_INFO, "%-7s ", "<string>" );
|
|
break;
|
|
case FF_OPT_TYPE_RATIONAL:
|
|
av_log( av_log_obj, AV_LOG_INFO, "%-7s ", "<rational>" );
|
|
break;
|
|
case FF_OPT_TYPE_CONST:
|
|
default:
|
|
av_log( av_log_obj, AV_LOG_INFO, "%-7s ", "" );
|
|
break;
|
|
}
|
|
av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_ENCODING_PARAM) ? 'E' : '.');
|
|
av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_DECODING_PARAM) ? 'D' : '.');
|
|
av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_VIDEO_PARAM ) ? 'V' : '.');
|
|
av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_AUDIO_PARAM ) ? 'A' : '.');
|
|
av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_SUBTITLE_PARAM) ? 'S' : '.');
|
|
|
|
if(opt->help)
|
|
av_log(av_log_obj, AV_LOG_INFO, " %s", opt->help);
|
|
av_log(av_log_obj, AV_LOG_INFO, "\n");
|
|
}
|
|
return 0;
|
|
}
|