aboutsummaryrefslogtreecommitdiff
path: root/libavutil/opt.c
diff options
context:
space:
mode:
Diffstat (limited to 'libavutil/opt.c')
-rw-r--r--libavutil/opt.c441
1 files changed, 441 insertions, 0 deletions
diff --git a/libavutil/opt.c b/libavutil/opt.c
new file mode 100644
index 0000000000..ba48a904c0
--- /dev/null
+++ b/libavutil/opt.c
@@ -0,0 +1,441 @@
+/*
+ * AVOptions
+ * Copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * AVOptions
+ * @author Michael Niedermayer <michaelni@gmx.at>
+ */
+
+#include "avutil.h"
+#include "opt.h"
+#include "libavutil/eval.h"
+
+//FIXME order them and do a bin search
+const AVOption *av_find_opt(void *v, const char *name, const char *unit, int mask, int flags){
+ AVClass *c= *(AVClass**)v; //FIXME silly way of storing AVClass
+ const AVOption *o= c->option;
+
+ for(;o && o->name; o++){
+ if(!strcmp(o->name, name) && (!unit || (o->unit && !strcmp(o->unit, unit))) && (o->flags & mask) == flags )
+ return o;
+ }
+ return NULL;
+}
+
+const AVOption *av_next_option(void *obj, const AVOption *last){
+ if(last && last[1].name) return ++last;
+ else if(last) return NULL;
+ else return (*(AVClass**)obj)->option;
+}
+
+static int av_set_number2(void *obj, const char *name, double num, int den, int64_t intnum, const AVOption **o_out){
+ const AVOption *o= av_find_opt(obj, name, NULL, 0, 0);
+ void *dst;
+ if(o_out)
+ *o_out= o;
+ if(!o || o->offset<=0)
+ return AVERROR(ENOENT);
+
+ if(o->max*den < num*intnum || o->min*den > num*intnum) {
+ av_log(obj, AV_LOG_ERROR, "Value %lf for parameter '%s' out of range\n", num, name);
+ return AVERROR(ERANGE);
+ }
+
+ dst= ((uint8_t*)obj) + o->offset;
+
+ switch(o->type){
+ case FF_OPT_TYPE_FLAGS:
+ case FF_OPT_TYPE_INT: *(int *)dst= llrint(num/den)*intnum; break;
+ case FF_OPT_TYPE_INT64: *(int64_t *)dst= llrint(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);
+ break;
+ default:
+ return AVERROR(EINVAL);
+ }
+ return 0;
+}
+
+static const AVOption *av_set_number(void *obj, const char *name, double num, int den, int64_t intnum){
+ const AVOption *o = NULL;
+ if (av_set_number2(obj, name, num, den, intnum, &o) < 0)
+ return NULL;
+ else
+ return o;
+}
+
+static const double const_values[]={
+ M_PI,
+ M_E,
+ FF_QP2LAMBDA,
+ 0
+};
+
+static const char * const const_names[]={
+ "PI",
+ "E",
+ "QP2LAMBDA",
+ 0
+};
+
+static int hexchar2int(char c) {
+ if (c >= '0' && c <= '9') return c - '0';
+ if (c >= 'a' && c <= 'f') return c - 'a' + 10;
+ if (c >= 'A' && c <= 'F') return c - 'A' + 10;
+ return -1;
+}
+
+int av_set_string3(void *obj, const char *name, const char *val, int alloc, const AVOption **o_out){
+ int ret;
+ const AVOption *o= av_find_opt(obj, name, NULL, 0, 0);
+ if (o_out)
+ *o_out = o;
+ if(!o)
+ return AVERROR(ENOENT);
+ if(!val || o->offset<=0)
+ return AVERROR(EINVAL);
+
+ if(o->type == FF_OPT_TYPE_BINARY){
+ uint8_t **dst = (uint8_t **)(((uint8_t*)obj) + o->offset);
+ int *lendst = (int *)(dst + 1);
+ uint8_t *bin, *ptr;
+ int len = strlen(val);
+ av_freep(dst);
+ *lendst = 0;
+ if (len & 1) return AVERROR(EINVAL);
+ len /= 2;
+ ptr = bin = av_malloc(len);
+ while (*val) {
+ int a = hexchar2int(*val++);
+ int b = hexchar2int(*val++);
+ if (a < 0 || b < 0) {
+ av_free(bin);
+ return AVERROR(EINVAL);
+ }
+ *ptr++ = (a << 4) | b;
+ }
+ *dst = bin;
+ *lendst = len;
+ return 0;
+ }
+ if(o->type != FF_OPT_TYPE_STRING){
+ int notfirst=0;
+ for(;;){
+ int i;
+ char buf[256];
+ 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;
+
+ {
+ const AVOption *o_named= av_find_opt(obj, buf, o->unit, 0, 0);
+ 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 if(!strcmp(buf, "none" )) d= 0;
+ else if(!strcmp(buf, "all" )) d= ~0;
+ else {
+ int res = av_parse_and_eval_expr(&d, buf, const_names, const_values, NULL, NULL, NULL, NULL, NULL, 0, obj);
+ if (res < 0) {
+ av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\"\n", val);
+ return res;
+ }
+ }
+ }
+ 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= notfirst*av_get_double(obj, name, NULL) + d;
+ else if(cmd=='-') d= notfirst*av_get_double(obj, name, NULL) - d;
+ }
+
+ if ((ret = av_set_number2(obj, name, d, 1, 1, o_out)) < 0)
+ return ret;
+ val+= i;
+ if(!*val)
+ return 0;
+ notfirst=1;
+ }
+ return AVERROR(EINVAL);
+ }
+
+ if(alloc){
+ av_free(*(void**)(((uint8_t*)obj) + o->offset));
+ val= av_strdup(val);
+ }
+
+ memcpy(((uint8_t*)obj) + o->offset, &val, sizeof(val));
+ return 0;
+}
+
+const AVOption *av_set_double(void *obj, const char *name, double n){
+ return av_set_number(obj, name, n, 1, 1);
+}
+
+const AVOption *av_set_q(void *obj, const char *name, AVRational n){
+ return av_set_number(obj, name, n.num, n.den, 1);
+}
+
+const 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, const AVOption **o_out, char *buf, int buf_len){
+ const AVOption *o= av_find_opt(obj, name, NULL, 0, 0);
+ void *dst;
+ uint8_t *bin;
+ int len, i;
+ 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;
+
+ 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;
+ case FF_OPT_TYPE_STRING: return *(void**)dst;
+ case FF_OPT_TYPE_BINARY:
+ len = *(int*)(((uint8_t *)dst) + sizeof(uint8_t *));
+ if(len >= (buf_len + 1)/2) return NULL;
+ bin = *(uint8_t**)dst;
+ for(i = 0; i < len; i++) snprintf(buf + i*2, 3, "%02X", bin[i]);
+ break;
+ default: return NULL;
+ }
+ return buf;
+}
+
+static int av_get_number(void *obj, const char *name, const AVOption **o_out, double *num, int *den, int64_t *intnum){
+ const AVOption *o= av_find_opt(obj, name, NULL, 0, 0);
+ 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: *intnum= *(unsigned int*)dst;return 0;
+ 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, const 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, const 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, const 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;
+}
+
+static void opt_list(void *obj, void *av_log_obj, const char *unit,
+ int req_flags, int rej_flags)
+{
+ const AVOption *opt=NULL;
+
+ while((opt= av_next_option(obj, opt))){
+ if (!(opt->flags & req_flags) || (opt->flags & rej_flags))
+ continue;
+
+ /* Don't print CONST's on level one.
+ * Don't print anything but CONST's on level two.
+ * Only print items from the requested unit.
+ */
+ if (!unit && opt->type==FF_OPT_TYPE_CONST)
+ continue;
+ else if (unit && opt->type!=FF_OPT_TYPE_CONST)
+ continue;
+ else if (unit && opt->type==FF_OPT_TYPE_CONST && strcmp(unit, opt->unit))
+ continue;
+ else if (unit && opt->type == FF_OPT_TYPE_CONST)
+ av_log(av_log_obj, AV_LOG_INFO, " %-15s ", opt->name);
+ else
+ 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_BINARY:
+ av_log( av_log_obj, AV_LOG_INFO, "%-7s ", "<binary>" );
+ 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");
+ if (opt->unit && opt->type != FF_OPT_TYPE_CONST) {
+ opt_list(obj, av_log_obj, opt->unit, req_flags, rej_flags);
+ }
+ }
+}
+
+int av_opt_show2(void *obj, void *av_log_obj, int req_flags, int rej_flags)
+{
+ if(!obj)
+ return -1;
+
+ av_log(av_log_obj, AV_LOG_INFO, "%s AVOptions:\n", (*(AVClass**)obj)->class_name);
+
+ opt_list(obj, av_log_obj, NULL, req_flags, rej_flags);
+
+ return 0;
+}
+
+/** Set the values of the AVCodecContext or AVFormatContext structure.
+ * They are set to the defaults specified in the according AVOption options
+ * array default_val field.
+ *
+ * @param s AVCodecContext or AVFormatContext for which the defaults will be set
+ */
+void av_opt_set_defaults2(void *s, int mask, int flags)
+{
+ const AVOption *opt = NULL;
+ while ((opt = av_next_option(s, opt)) != NULL) {
+ if((opt->flags & mask) != flags)
+ continue;
+ switch(opt->type) {
+ case FF_OPT_TYPE_CONST:
+ /* Nothing to be done here */
+ break;
+ case FF_OPT_TYPE_FLAGS:
+ case FF_OPT_TYPE_INT: {
+ int val;
+ val = opt->default_val;
+ av_set_int(s, opt->name, val);
+ }
+ break;
+ case FF_OPT_TYPE_INT64:
+ if((double)(opt->default_val+0.6) == opt->default_val)
+ av_log(s, AV_LOG_DEBUG, "loss of precision in default of %s\n", opt->name);
+ av_set_int(s, opt->name, opt->default_val);
+ break;
+ case FF_OPT_TYPE_FLOAT: {
+ double val;
+ val = opt->default_val;
+ av_set_double(s, opt->name, val);
+ }
+ break;
+ case FF_OPT_TYPE_RATIONAL: {
+ AVRational val;
+ val = av_d2q(opt->default_val, INT_MAX);
+ av_set_q(s, opt->name, val);
+ }
+ break;
+ case FF_OPT_TYPE_STRING:
+ case FF_OPT_TYPE_BINARY:
+ /* Cannot set default for string as default_val is of type * double */
+ break;
+ default:
+ 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);
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-15 07:02:28 +0000