613 lines
20 KiB
C
613 lines
20 KiB
C
/*
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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
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* AVOptions
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* @author Michael Niedermayer <michaelni@gmx.at>
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*/
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#include "avutil.h"
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#include "avstring.h"
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#include "opt.h"
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#include "eval.h"
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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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{
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const AVOption *o = NULL;
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while ((o = av_next_option(v, 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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const AVOption *av_next_option(void *obj, const AVOption *last)
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{
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if (last && last[1].name) return ++last;
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else if (last || !(*(AVClass**)obj)->option->name) return NULL;
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else return (*(AVClass**)obj)->option;
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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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{
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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_OPTION_NOT_FOUND;
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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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dst= ((uint8_t*)obj) + o->offset;
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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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static const AVOption *av_set_number(void *obj, const char *name, double num, int den, int64_t intnum)
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{
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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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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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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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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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int av_set_string3(void *obj, const char *name, const char *val, int alloc, const AVOption **o_out)
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{
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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_OPTION_NOT_FOUND;
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if ((!val && o->type != FF_OPT_TYPE_STRING) || o->offset<=0)
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return AVERROR(EINVAL);
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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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if (*val == '+' || *val == '-')
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cmd= *(val++);
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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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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.dbl;
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else if (!strcmp(buf, "default")) d= o->default_val.dbl;
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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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int res = av_expr_parse_and_eval(&d, buf, const_names, const_values, NULL, NULL, NULL, NULL, NULL, 0, obj);
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if (res < 0) {
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av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\"\n", val);
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return res;
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}
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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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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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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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const AVOption *av_set_double(void *obj, const char *name, double n)
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{
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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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{
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return av_set_number(obj, name, n.num, n.den, 1);
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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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{
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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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* @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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{
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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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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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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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{
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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 && o->type != FF_OPT_TYPE_CONST))
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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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case FF_OPT_TYPE_CONST: *intnum= o->default_val.dbl;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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double av_get_double(void *obj, const char *name, const AVOption **o_out)
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{
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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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if (av_get_number(obj, name, o_out, &num, &den, &intnum) < 0)
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return NAN;
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return num*intnum/den;
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}
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AVRational av_get_q(void *obj, const char *name, const AVOption **o_out)
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{
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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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if (av_get_number(obj, name, o_out, &num, &den, &intnum) < 0)
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return (AVRational){0, 0};
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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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}
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int64_t av_get_int(void *obj, const char *name, const AVOption **o_out)
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{
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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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if (av_get_number(obj, name, o_out, &num, &den, &intnum) < 0)
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return -1;
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return num*intnum/den;
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}
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static void opt_list(void *obj, void *av_log_obj, const char *unit,
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int req_flags, int rej_flags)
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{
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const AVOption *opt=NULL;
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while ((opt= av_next_option(obj, opt))) {
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if (!(opt->flags & req_flags) || (opt->flags & rej_flags))
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continue;
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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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*/
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if (!unit && opt->type==FF_OPT_TYPE_CONST)
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continue;
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else if (unit && opt->type!=FF_OPT_TYPE_CONST)
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continue;
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else if (unit && opt->type==FF_OPT_TYPE_CONST && strcmp(unit, opt->unit))
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continue;
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else if (unit && opt->type == FF_OPT_TYPE_CONST)
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av_log(av_log_obj, AV_LOG_INFO, " %-15s ", opt->name);
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else
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av_log(av_log_obj, AV_LOG_INFO, "-%-17s ", opt->name);
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switch (opt->type) {
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case FF_OPT_TYPE_FLAGS:
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av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<flags>");
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break;
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case FF_OPT_TYPE_INT:
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av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<int>");
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break;
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case FF_OPT_TYPE_INT64:
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av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<int64>");
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break;
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case FF_OPT_TYPE_DOUBLE:
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av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<double>");
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break;
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case FF_OPT_TYPE_FLOAT:
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av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<float>");
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break;
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case FF_OPT_TYPE_STRING:
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av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<string>");
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break;
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case FF_OPT_TYPE_RATIONAL:
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av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<rational>");
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break;
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case FF_OPT_TYPE_BINARY:
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av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<binary>");
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break;
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case FF_OPT_TYPE_CONST:
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default:
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av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "");
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break;
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}
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av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_ENCODING_PARAM) ? 'E' : '.');
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av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_DECODING_PARAM) ? 'D' : '.');
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av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_VIDEO_PARAM ) ? 'V' : '.');
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av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_AUDIO_PARAM ) ? 'A' : '.');
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av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_SUBTITLE_PARAM) ? 'S' : '.');
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if (opt->help)
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av_log(av_log_obj, AV_LOG_INFO, " %s", opt->help);
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av_log(av_log_obj, AV_LOG_INFO, "\n");
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if (opt->unit && opt->type != FF_OPT_TYPE_CONST) {
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opt_list(obj, av_log_obj, opt->unit, req_flags, rej_flags);
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}
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}
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}
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int av_opt_show2(void *obj, void *av_log_obj, int req_flags, int rej_flags)
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{
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if (!obj)
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return -1;
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av_log(av_log_obj, AV_LOG_INFO, "%s AVOptions:\n", (*(AVClass**)obj)->class_name);
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opt_list(obj, av_log_obj, NULL, req_flags, rej_flags);
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return 0;
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}
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/** Set the values of the AVCodecContext or AVFormatContext structure.
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* They are set to the defaults specified in the according AVOption options
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* array default_val field.
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*
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* @param s AVCodecContext or AVFormatContext for which the defaults will be set
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*/
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void av_opt_set_defaults2(void *s, int mask, int flags)
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{
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const AVOption *opt = NULL;
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while ((opt = av_next_option(s, opt)) != NULL) {
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if ((opt->flags & mask) != flags)
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continue;
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switch (opt->type) {
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case FF_OPT_TYPE_CONST:
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/* Nothing to be done here */
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break;
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case FF_OPT_TYPE_FLAGS:
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case FF_OPT_TYPE_INT: {
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int val;
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val = opt->default_val.dbl;
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av_set_int(s, opt->name, val);
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}
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break;
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case FF_OPT_TYPE_INT64:
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if ((double)(opt->default_val.dbl+0.6) == opt->default_val.dbl)
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av_log(s, AV_LOG_DEBUG, "loss of precision in default of %s\n", opt->name);
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av_set_int(s, opt->name, opt->default_val.dbl);
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break;
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case FF_OPT_TYPE_DOUBLE:
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case FF_OPT_TYPE_FLOAT: {
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double val;
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val = opt->default_val.dbl;
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av_set_double(s, opt->name, val);
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}
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break;
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case FF_OPT_TYPE_RATIONAL: {
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AVRational val;
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val = av_d2q(opt->default_val.dbl, INT_MAX);
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av_set_q(s, opt->name, val);
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}
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break;
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case FF_OPT_TYPE_STRING:
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av_set_string3(s, opt->name, opt->default_val.str, 1, NULL);
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break;
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case FF_OPT_TYPE_BINARY:
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/* Cannot set default for binary */
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break;
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default:
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av_log(s, AV_LOG_DEBUG, "AVOption type %d of option %s not implemented yet\n", opt->type, opt->name);
|
|
}
|
|
}
|
|
}
|
|
|
|
void av_opt_set_defaults(void *s)
|
|
{
|
|
av_opt_set_defaults2(s, 0, 0);
|
|
}
|
|
|
|
/**
|
|
* Store the value in the field in ctx that is named like key.
|
|
* ctx must be an AVClass context, storing is done using AVOptions.
|
|
*
|
|
* @param buf the string to parse, buf will be updated to point at the
|
|
* separator just after the parsed key/value pair
|
|
* @param key_val_sep a 0-terminated list of characters used to
|
|
* separate key from value
|
|
* @param pairs_sep a 0-terminated list of characters used to separate
|
|
* two pairs from each other
|
|
* @return 0 if the key/value pair has been successfully parsed and
|
|
* set, or a negative value corresponding to an AVERROR code in case
|
|
* of error:
|
|
* AVERROR(EINVAL) if the key/value pair cannot be parsed,
|
|
* the error code issued by av_set_string3() if the key/value pair
|
|
* cannot be set
|
|
*/
|
|
static int parse_key_value_pair(void *ctx, const char **buf,
|
|
const char *key_val_sep, const char *pairs_sep)
|
|
{
|
|
char *key = av_get_token(buf, key_val_sep);
|
|
char *val;
|
|
int ret;
|
|
|
|
if (*key && strspn(*buf, key_val_sep)) {
|
|
(*buf)++;
|
|
val = av_get_token(buf, pairs_sep);
|
|
} else {
|
|
av_log(ctx, AV_LOG_ERROR, "Missing key or no key/value separator found after key '%s'\n", key);
|
|
av_free(key);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
av_log(ctx, AV_LOG_DEBUG, "Setting value '%s' for key '%s'\n", val, key);
|
|
|
|
ret = av_set_string3(ctx, key, val, 1, NULL);
|
|
if (ret == AVERROR_OPTION_NOT_FOUND)
|
|
av_log(ctx, AV_LOG_ERROR, "Key '%s' not found.\n", key);
|
|
|
|
av_free(key);
|
|
av_free(val);
|
|
return ret;
|
|
}
|
|
|
|
int av_set_options_string(void *ctx, const char *opts,
|
|
const char *key_val_sep, const char *pairs_sep)
|
|
{
|
|
int ret, count = 0;
|
|
|
|
while (*opts) {
|
|
if ((ret = parse_key_value_pair(ctx, &opts, key_val_sep, pairs_sep)) < 0)
|
|
return ret;
|
|
count++;
|
|
|
|
if (*opts)
|
|
opts++;
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
#ifdef TEST
|
|
|
|
#undef printf
|
|
|
|
typedef struct TestContext
|
|
{
|
|
const AVClass *class;
|
|
int num;
|
|
int toggle;
|
|
char *string;
|
|
int flags;
|
|
AVRational rational;
|
|
} TestContext;
|
|
|
|
#define OFFSET(x) offsetof(TestContext, x)
|
|
|
|
#define TEST_FLAG_COOL 01
|
|
#define TEST_FLAG_LAME 02
|
|
#define TEST_FLAG_MU 04
|
|
|
|
static const AVOption test_options[]= {
|
|
{"num", "set num", OFFSET(num), FF_OPT_TYPE_INT, 0, 0, 100 },
|
|
{"toggle", "set toggle", OFFSET(toggle), FF_OPT_TYPE_INT, 0, 0, 1 },
|
|
{"rational", "set rational", OFFSET(rational), FF_OPT_TYPE_RATIONAL, 0, 0, 10 },
|
|
{"string", "set string", OFFSET(string), FF_OPT_TYPE_STRING, 0, CHAR_MIN, CHAR_MAX },
|
|
{"flags", "set flags", OFFSET(flags), FF_OPT_TYPE_FLAGS, 0, 0, INT_MAX, 0, "flags" },
|
|
{"cool", "set cool flag ", 0, FF_OPT_TYPE_CONST, TEST_FLAG_COOL, INT_MIN, INT_MAX, 0, "flags" },
|
|
{"lame", "set lame flag ", 0, FF_OPT_TYPE_CONST, TEST_FLAG_LAME, INT_MIN, INT_MAX, 0, "flags" },
|
|
{"mu", "set mu flag ", 0, FF_OPT_TYPE_CONST, TEST_FLAG_MU, INT_MIN, INT_MAX, 0, "flags" },
|
|
{NULL},
|
|
};
|
|
|
|
static const char *test_get_name(void *ctx)
|
|
{
|
|
return "test";
|
|
}
|
|
|
|
static const AVClass test_class = {
|
|
"TestContext",
|
|
test_get_name,
|
|
test_options
|
|
};
|
|
|
|
int main(void)
|
|
{
|
|
int i;
|
|
|
|
printf("\nTesting av_set_options_string()\n");
|
|
{
|
|
TestContext test_ctx;
|
|
const char *options[] = {
|
|
"",
|
|
":",
|
|
"=",
|
|
"foo=:",
|
|
":=foo",
|
|
"=foo",
|
|
"foo=",
|
|
"foo",
|
|
"foo=val",
|
|
"foo==val",
|
|
"toggle=:",
|
|
"string=:",
|
|
"toggle=1 : foo",
|
|
"toggle=100",
|
|
"toggle==1",
|
|
"flags=+mu-lame : num=42: toggle=0",
|
|
"num=42 : string=blahblah",
|
|
"rational=0 : rational=1/2 : rational=1/-1",
|
|
"rational=-1/0",
|
|
};
|
|
|
|
test_ctx.class = &test_class;
|
|
av_opt_set_defaults2(&test_ctx, 0, 0);
|
|
test_ctx.string = av_strdup("default");
|
|
|
|
av_log_set_level(AV_LOG_DEBUG);
|
|
|
|
for (i=0; i < FF_ARRAY_ELEMS(options); i++) {
|
|
av_log(&test_ctx, AV_LOG_DEBUG, "Setting options string '%s'\n", options[i]);
|
|
if (av_set_options_string(&test_ctx, options[i], "=", ":") < 0)
|
|
av_log(&test_ctx, AV_LOG_ERROR, "Error setting options string: '%s'\n", options[i]);
|
|
printf("\n");
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#endif
|