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607 lines
19 KiB
607 lines
19 KiB
/* |
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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 Libav. |
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* |
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* Libav 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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* Libav 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 Libav; 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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/** |
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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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|
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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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|
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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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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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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) 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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{ |
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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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|
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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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|
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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->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) |
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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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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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av_get_number(obj, name, o_out, &num, &den, &intnum); |
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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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av_get_number(obj, name, o_out, &num, &den, &intnum); |
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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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av_get_number(obj, name, o_out, &num, &den, &intnum); |
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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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|
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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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|
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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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case FF_OPT_TYPE_BINARY: |
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/* Cannot set default for string as default_val is of type * double */ |
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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); |
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} |
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} |
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} |
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|
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void av_opt_set_defaults(void *s) |
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{ |
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av_opt_set_defaults2(s, 0, 0); |
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} |
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|
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/** |
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* Store the value in the field in ctx that is named like key. |
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* ctx must be an AVClass context, storing is done using AVOptions. |
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* |
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* @param buf the string to parse, buf will be updated to point at the |
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* separator just after the parsed key/value pair |
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* @param key_val_sep a 0-terminated list of characters used to |
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* separate key from value |
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* @param pairs_sep a 0-terminated list of characters used to separate |
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* two pairs from each other |
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* @return 0 if the key/value pair has been successfully parsed and |
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* set, or a negative value corresponding to an AVERROR code in case |
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* of error: |
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* AVERROR(EINVAL) if the key/value pair cannot be parsed, |
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* the error code issued by av_set_string3() if the key/value pair |
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* cannot be set |
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*/ |
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static int parse_key_value_pair(void *ctx, const char **buf, |
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const char *key_val_sep, const char *pairs_sep) |
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{ |
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char *key = av_get_token(buf, key_val_sep); |
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char *val; |
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int ret; |
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|
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if (*key && strspn(*buf, key_val_sep)) { |
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(*buf)++; |
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val = av_get_token(buf, pairs_sep); |
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} else { |
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av_log(ctx, AV_LOG_ERROR, "Missing key or no key/value separator found after key '%s'\n", key); |
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av_free(key); |
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return AVERROR(EINVAL); |
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} |
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|
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av_log(ctx, AV_LOG_DEBUG, "Setting value '%s' for key '%s'\n", val, key); |
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|
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ret = av_set_string3(ctx, key, val, 1, NULL); |
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if (ret == AVERROR_OPTION_NOT_FOUND) |
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av_log(ctx, AV_LOG_ERROR, "Key '%s' not found.\n", key); |
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|
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av_free(key); |
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av_free(val); |
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return ret; |
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} |
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|
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int av_set_options_string(void *ctx, const char *opts, |
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const char *key_val_sep, const char *pairs_sep) |
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{ |
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int ret, count = 0; |
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|
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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
|
|
|