/* * AVOptions * Copyright (c) 2005 Michael Niedermayer * * 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 opt.c * AVOptions * @author Michael Niedermayer */ #include "avcodec.h" #include "opt.h" #include "eval.h" #include "libavutil/common.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; iunit, 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 ", "" ); break; case FF_OPT_TYPE_INT: av_log( av_log_obj, AV_LOG_INFO, "%-7s ", "" ); break; case FF_OPT_TYPE_INT64: av_log( av_log_obj, AV_LOG_INFO, "%-7s ", "" ); break; case FF_OPT_TYPE_DOUBLE: av_log( av_log_obj, AV_LOG_INFO, "%-7s ", "" ); break; case FF_OPT_TYPE_FLOAT: av_log( av_log_obj, AV_LOG_INFO, "%-7s ", "" ); break; case FF_OPT_TYPE_STRING: av_log( av_log_obj, AV_LOG_INFO, "%-7s ", "" ); break; case FF_OPT_TYPE_RATIONAL: av_log( av_log_obj, AV_LOG_INFO, "%-7s ", "" ); break; case FF_OPT_TYPE_BINARY: av_log( av_log_obj, AV_LOG_INFO, "%-7s ", "" ); 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); }