| /* |
| * 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 libavcodec/opt.c |
| * AVOptions |
| * @author Michael Niedermayer <michaelni@gmx.at> |
| */ |
| |
| #include "avcodec.h" |
| #include "opt.h" |
| #include "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(NULL, 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; |
| const char *error = NULL; |
| |
| 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; |
| |
| d = ff_eval2(buf, const_values, const_names, NULL, NULL, NULL, NULL, NULL, &error); |
| if(isnan(d)) { |
| 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 { |
| if (error) |
| av_log(NULL, AV_LOG_ERROR, "Unable to parse option value \"%s\": %s\n", val, error); |
| return AVERROR(EINVAL); |
| } |
| } |
| 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; |
| } |
| |
| #if LIBAVCODEC_VERSION_MAJOR < 53 |
| const AVOption *av_set_string2(void *obj, const char *name, const char *val, int alloc){ |
| const AVOption *o; |
| if (av_set_string3(obj, name, val, alloc, &o) < 0) |
| return NULL; |
| return o; |
| } |
| |
| const AVOption *av_set_string(void *obj, const char *name, const char *val){ |
| const AVOption *o; |
| if (av_set_string3(obj, name, val, 0, &o) < 0) |
| return NULL; |
| return o; |
| } |
| #endif |
| |
| 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) |
| { |
| const AVOption *opt=NULL; |
| |
| while((opt= av_next_option(obj, opt))){ |
| if(!(opt->flags & (AV_OPT_FLAG_ENCODING_PARAM|AV_OPT_FLAG_DECODING_PARAM))) |
| 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); |
| } |
| } |
| } |
| |
| int av_opt_show(void *obj, void *av_log_obj){ |
| 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); |
| |
| 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 precission 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); |
| } |
| |
