| /* |
| * 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 "avstring.h" |
| #include "opt.h" |
| #include "eval.h" |
| #include "dict.h" |
| #include "log.h" |
| |
| #if FF_API_FIND_OPT |
| //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) |
| { |
| const AVOption *o = NULL; |
| |
| while ((o = av_next_option(v, o))) { |
| if (!strcmp(o->name, name) && (!unit || (o->unit && !strcmp(o->unit, unit))) && (o->flags & mask) == flags) |
| return o; |
| } |
| return NULL; |
| } |
| #endif |
| |
| #if FF_API_OLD_AVOPTIONS |
| const AVOption *av_next_option(void *obj, const AVOption *last) |
| { |
| return av_opt_next(obj, last); |
| } |
| #endif |
| |
| const AVOption *av_opt_next(void *obj, const AVOption *last) |
| { |
| AVClass *class = *(AVClass**)obj; |
| if (!last && class->option && class->option[0].name) |
| return class->option; |
| if (last && last[1].name) |
| return ++last; |
| return NULL; |
| } |
| |
| static int read_number(const AVOption *o, void *dst, double *num, int *den, int64_t *intnum) |
| { |
| switch (o->type) { |
| case AV_OPT_TYPE_FLAGS: *intnum = *(unsigned int*)dst;return 0; |
| case AV_OPT_TYPE_INT: *intnum = *(int *)dst;return 0; |
| case AV_OPT_TYPE_INT64: *intnum = *(int64_t *)dst;return 0; |
| case AV_OPT_TYPE_FLOAT: *num = *(float *)dst;return 0; |
| case AV_OPT_TYPE_DOUBLE: *num = *(double *)dst;return 0; |
| case AV_OPT_TYPE_RATIONAL: *intnum = ((AVRational*)dst)->num; |
| *den = ((AVRational*)dst)->den; |
| return 0; |
| case AV_OPT_TYPE_CONST: *num = o->default_val.dbl; return 0; |
| } |
| return AVERROR(EINVAL); |
| } |
| |
| static int write_number(void *obj, const AVOption *o, void *dst, double num, int den, int64_t intnum) |
| { |
| if (o->max*den < num*intnum || o->min*den > num*intnum) { |
| av_log(obj, AV_LOG_ERROR, "Value %f for parameter '%s' out of range\n", num*intnum/den, o->name); |
| return AVERROR(ERANGE); |
| } |
| |
| switch (o->type) { |
| case AV_OPT_TYPE_FLAGS: |
| case AV_OPT_TYPE_INT: *(int *)dst= llrint(num/den)*intnum; break; |
| case AV_OPT_TYPE_INT64: *(int64_t *)dst= llrint(num/den)*intnum; break; |
| case AV_OPT_TYPE_FLOAT: *(float *)dst= num*intnum/den; break; |
| case AV_OPT_TYPE_DOUBLE:*(double *)dst= num*intnum/den; break; |
| case AV_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 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; |
| } |
| |
| static int set_string_binary(void *obj, const AVOption *o, const char *val, uint8_t **dst) |
| { |
| 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; |
| } |
| |
| static int set_string(void *obj, const AVOption *o, const char *val, uint8_t **dst) |
| { |
| av_freep(dst); |
| *dst = av_strdup(val); |
| return 0; |
| } |
| |
| static int set_string_number(void *obj, const AVOption *o, const char *val, void *dst) |
| { |
| int ret = 0, notfirst = 0; |
| for (;;) { |
| int i, den = 1; |
| char buf[256]; |
| int cmd = 0; |
| double d, num = 1; |
| int64_t intnum = 1; |
| |
| 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_opt_find(obj, buf, o->unit, 0, 0); |
| if (o_named && o_named->type == AV_OPT_TYPE_CONST) |
| d = o_named->default_val.dbl; |
| else if (!strcmp(buf, "default")) d = o->default_val.dbl; |
| 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_expr_parse_and_eval(&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 == AV_OPT_TYPE_FLAGS) { |
| read_number(o, dst, NULL, NULL, &intnum); |
| if (cmd == '+') d = intnum | (int64_t)d; |
| else if (cmd == '-') d = intnum &~(int64_t)d; |
| } else { |
| read_number(o, dst, &num, &den, &intnum); |
| if (cmd == '+') d = notfirst*num*intnum/den + d; |
| else if (cmd == '-') d = notfirst*num*intnum/den - d; |
| } |
| |
| if ((ret = write_number(obj, o, dst, d, 1, 1)) < 0) |
| return ret; |
| val += i; |
| if (!*val) |
| return 0; |
| notfirst = 1; |
| } |
| |
| return 0; |
| } |
| |
| #if FF_API_OLD_AVOPTIONS |
| int av_set_string3(void *obj, const char *name, const char *val, int alloc, const AVOption **o_out) |
| { |
| const AVOption *o = av_opt_find(obj, name, NULL, 0, 0); |
| if (o_out) |
| *o_out = o; |
| return av_opt_set(obj, name, val, 0); |
| } |
| #endif |
| |
| int av_opt_set(void *obj, const char *name, const char *val, int search_flags) |
| { |
| void *dst, *target_obj; |
| const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj); |
| if (!o || !target_obj) |
| return AVERROR_OPTION_NOT_FOUND; |
| if (!val && o->type != AV_OPT_TYPE_STRING) |
| return AVERROR(EINVAL); |
| |
| dst = ((uint8_t*)target_obj) + o->offset; |
| switch (o->type) { |
| case AV_OPT_TYPE_STRING: return set_string(obj, o, val, dst); |
| case AV_OPT_TYPE_BINARY: return set_string_binary(obj, o, val, dst); |
| case AV_OPT_TYPE_FLAGS: |
| case AV_OPT_TYPE_INT: |
| case AV_OPT_TYPE_INT64: |
| case AV_OPT_TYPE_FLOAT: |
| case AV_OPT_TYPE_DOUBLE: |
| case AV_OPT_TYPE_RATIONAL: return set_string_number(obj, o, val, dst); |
| } |
| |
| av_log(obj, AV_LOG_ERROR, "Invalid option type.\n"); |
| return AVERROR(EINVAL); |
| } |
| |
| #define OPT_EVAL_NUMBER(name, opttype, vartype)\ |
| int av_opt_eval_ ## name(void *obj, const AVOption *o, const char *val, vartype *name ## _out)\ |
| {\ |
| if (!o || o->type != opttype)\ |
| return AVERROR(EINVAL);\ |
| return set_string_number(obj, o, val, name ## _out);\ |
| } |
| |
| OPT_EVAL_NUMBER(flags, AV_OPT_TYPE_FLAGS, int) |
| OPT_EVAL_NUMBER(int, AV_OPT_TYPE_INT, int) |
| OPT_EVAL_NUMBER(int64, AV_OPT_TYPE_INT64, int64_t) |
| OPT_EVAL_NUMBER(float, AV_OPT_TYPE_FLOAT, float) |
| OPT_EVAL_NUMBER(double, AV_OPT_TYPE_DOUBLE, double) |
| OPT_EVAL_NUMBER(q, AV_OPT_TYPE_RATIONAL, AVRational) |
| |
| static int set_number(void *obj, const char *name, double num, int den, int64_t intnum, |
| int search_flags) |
| { |
| void *dst, *target_obj; |
| const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj); |
| |
| if (!o || !target_obj) |
| return AVERROR_OPTION_NOT_FOUND; |
| |
| dst = ((uint8_t*)target_obj) + o->offset; |
| return write_number(obj, o, dst, num, den, intnum); |
| } |
| |
| #if FF_API_OLD_AVOPTIONS |
| const AVOption *av_set_double(void *obj, const char *name, double n) |
| { |
| const AVOption *o = av_opt_find(obj, name, NULL, 0, 0); |
| if (set_number(obj, name, n, 1, 1, 0) < 0) |
| return NULL; |
| return o; |
| } |
| |
| const AVOption *av_set_q(void *obj, const char *name, AVRational n) |
| { |
| const AVOption *o = av_opt_find(obj, name, NULL, 0, 0); |
| if (set_number(obj, name, n.num, n.den, 1, 0) < 0) |
| return NULL; |
| return o; |
| } |
| |
| const AVOption *av_set_int(void *obj, const char *name, int64_t n) |
| { |
| const AVOption *o = av_opt_find(obj, name, NULL, 0, 0); |
| if (set_number(obj, name, 1, 1, n, 0) < 0) |
| return NULL; |
| return o; |
| } |
| #endif |
| |
| int av_opt_set_int(void *obj, const char *name, int64_t val, int search_flags) |
| { |
| return set_number(obj, name, 1, 1, val, search_flags); |
| } |
| |
| int av_opt_set_double(void *obj, const char *name, double val, int search_flags) |
| { |
| return set_number(obj, name, val, 1, 1, search_flags); |
| } |
| |
| int av_opt_set_q(void *obj, const char *name, AVRational val, int search_flags) |
| { |
| return set_number(obj, name, val.num, val.den, 1, search_flags); |
| } |
| |
| #if FF_API_OLD_AVOPTIONS |
| /** |
| * |
| * @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_opt_find(obj, name, NULL, 0, AV_OPT_SEARCH_CHILDREN); |
| void *dst; |
| uint8_t *bin; |
| int len, i; |
| if (!o) |
| return NULL; |
| if (o->type != AV_OPT_TYPE_STRING && (!buf || !buf_len)) |
| return NULL; |
| |
| dst= ((uint8_t*)obj) + o->offset; |
| if (o_out) *o_out= o; |
| |
| switch (o->type) { |
| case AV_OPT_TYPE_FLAGS: snprintf(buf, buf_len, "0x%08X",*(int *)dst);break; |
| case AV_OPT_TYPE_INT: snprintf(buf, buf_len, "%d" , *(int *)dst);break; |
| case AV_OPT_TYPE_INT64: snprintf(buf, buf_len, "%"PRId64, *(int64_t*)dst);break; |
| case AV_OPT_TYPE_FLOAT: snprintf(buf, buf_len, "%f" , *(float *)dst);break; |
| case AV_OPT_TYPE_DOUBLE: snprintf(buf, buf_len, "%f" , *(double *)dst);break; |
| case AV_OPT_TYPE_RATIONAL: snprintf(buf, buf_len, "%d/%d", ((AVRational*)dst)->num, ((AVRational*)dst)->den);break; |
| case AV_OPT_TYPE_CONST: snprintf(buf, buf_len, "%f" , o->default_val.dbl);break; |
| case AV_OPT_TYPE_STRING: return *(void**)dst; |
| case AV_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; |
| } |
| #endif |
| |
| int av_opt_get(void *obj, const char *name, int search_flags, uint8_t **out_val) |
| { |
| void *dst, *target_obj; |
| const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj); |
| uint8_t *bin, buf[128]; |
| int len, i, ret; |
| |
| if (!o || !target_obj || (o->offset<=0 && o->type != AV_OPT_TYPE_CONST)) |
| return AVERROR_OPTION_NOT_FOUND; |
| |
| dst = (uint8_t*)target_obj + o->offset; |
| |
| buf[0] = 0; |
| switch (o->type) { |
| case AV_OPT_TYPE_FLAGS: ret = snprintf(buf, sizeof(buf), "0x%08X", *(int *)dst);break; |
| case AV_OPT_TYPE_INT: ret = snprintf(buf, sizeof(buf), "%d" , *(int *)dst);break; |
| case AV_OPT_TYPE_INT64: ret = snprintf(buf, sizeof(buf), "%"PRId64, *(int64_t*)dst);break; |
| case AV_OPT_TYPE_FLOAT: ret = snprintf(buf, sizeof(buf), "%f" , *(float *)dst);break; |
| case AV_OPT_TYPE_DOUBLE: ret = snprintf(buf, sizeof(buf), "%f" , *(double *)dst);break; |
| case AV_OPT_TYPE_RATIONAL: ret = snprintf(buf, sizeof(buf), "%d/%d", ((AVRational*)dst)->num, ((AVRational*)dst)->den);break; |
| case AV_OPT_TYPE_CONST: ret = snprintf(buf, sizeof(buf), "%f" , o->default_val.dbl);break; |
| case AV_OPT_TYPE_STRING: |
| if (*(uint8_t**)dst) |
| *out_val = av_strdup(*(uint8_t**)dst); |
| else |
| *out_val = av_strdup(""); |
| return 0; |
| case AV_OPT_TYPE_BINARY: |
| len = *(int*)(((uint8_t *)dst) + sizeof(uint8_t *)); |
| if ((uint64_t)len*2 + 1 > INT_MAX) |
| return AVERROR(EINVAL); |
| if (!(*out_val = av_malloc(len*2 + 1))) |
| return AVERROR(ENOMEM); |
| bin = *(uint8_t**)dst; |
| for (i = 0; i < len; i++) |
| snprintf(*out_val + i*2, 3, "%02X", bin[i]); |
| return 0; |
| default: |
| return AVERROR(EINVAL); |
| } |
| |
| if (ret >= sizeof(buf)) |
| return AVERROR(EINVAL); |
| *out_val = av_strdup(buf); |
| return 0; |
| } |
| |
| static int get_number(void *obj, const char *name, const AVOption **o_out, double *num, int *den, int64_t *intnum, |
| int search_flags) |
| { |
| void *dst, *target_obj; |
| const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj); |
| if (!o || !target_obj) |
| goto error; |
| |
| dst = ((uint8_t*)target_obj) + o->offset; |
| |
| if (o_out) *o_out= o; |
| |
| return read_number(o, dst, num, den, intnum); |
| |
| error: |
| *den=*intnum=0; |
| return -1; |
| } |
| |
| #if FF_API_OLD_AVOPTIONS |
| double av_get_double(void *obj, const char *name, const AVOption **o_out) |
| { |
| int64_t intnum=1; |
| double num=1; |
| int den=1; |
| |
| if (get_number(obj, name, o_out, &num, &den, &intnum, 0) < 0) |
| return NAN; |
| 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; |
| |
| if (get_number(obj, name, o_out, &num, &den, &intnum, 0) < 0) |
| return (AVRational){0, 0}; |
| 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; |
| |
| if (get_number(obj, name, o_out, &num, &den, &intnum, 0) < 0) |
| return -1; |
| return num*intnum/den; |
| } |
| #endif |
| |
| int av_opt_get_int(void *obj, const char *name, int search_flags, int64_t *out_val) |
| { |
| int64_t intnum = 1; |
| double num = 1; |
| int ret, den = 1; |
| |
| if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0) |
| return ret; |
| *out_val = num*intnum/den; |
| return 0; |
| } |
| |
| int av_opt_get_double(void *obj, const char *name, int search_flags, double *out_val) |
| { |
| int64_t intnum = 1; |
| double num = 1; |
| int ret, den = 1; |
| |
| if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0) |
| return ret; |
| *out_val = num*intnum/den; |
| return 0; |
| } |
| |
| int av_opt_get_q(void *obj, const char *name, int search_flags, AVRational *out_val) |
| { |
| int64_t intnum = 1; |
| double num = 1; |
| int ret, den = 1; |
| |
| if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0) |
| return ret; |
| |
| if (num == 1.0 && (int)intnum == intnum) |
| *out_val = (AVRational){intnum, den}; |
| else |
| *out_val = av_d2q(num*intnum/den, 1<<24); |
| return 0; |
| } |
| |
| int av_opt_flag_is_set(void *obj, const char *field_name, const char *flag_name) |
| { |
| const AVOption *field = av_opt_find(obj, field_name, NULL, 0, 0); |
| const AVOption *flag = av_opt_find(obj, flag_name, |
| field ? field->unit : NULL, 0, 0); |
| int64_t res; |
| |
| if (!field || !flag || flag->type != AV_OPT_TYPE_CONST || |
| av_opt_get_int(obj, field_name, 0, &res) < 0) |
| return 0; |
| return res & (int) flag->default_val.dbl; |
| } |
| |
| 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_opt_next(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==AV_OPT_TYPE_CONST) |
| continue; |
| else if (unit && opt->type!=AV_OPT_TYPE_CONST) |
| continue; |
| else if (unit && opt->type==AV_OPT_TYPE_CONST && strcmp(unit, opt->unit)) |
| continue; |
| else if (unit && opt->type == AV_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 AV_OPT_TYPE_FLAGS: |
| av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<flags>"); |
| break; |
| case AV_OPT_TYPE_INT: |
| av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<int>"); |
| break; |
| case AV_OPT_TYPE_INT64: |
| av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<int64>"); |
| break; |
| case AV_OPT_TYPE_DOUBLE: |
| av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<double>"); |
| break; |
| case AV_OPT_TYPE_FLOAT: |
| av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<float>"); |
| break; |
| case AV_OPT_TYPE_STRING: |
| av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<string>"); |
| break; |
| case AV_OPT_TYPE_RATIONAL: |
| av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<rational>"); |
| break; |
| case AV_OPT_TYPE_BINARY: |
| av_log(av_log_obj, AV_LOG_INFO, "%-7s ", "<binary>"); |
| break; |
| case AV_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 != AV_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; |
| } |
| |
| void av_opt_set_defaults(void *s) |
| { |
| #if FF_API_OLD_AVOPTIONS |
| av_opt_set_defaults2(s, 0, 0); |
| } |
| |
| void av_opt_set_defaults2(void *s, int mask, int flags) |
| { |
| #endif |
| const AVOption *opt = NULL; |
| while ((opt = av_opt_next(s, opt)) != NULL) { |
| #if FF_API_OLD_AVOPTIONS |
| if ((opt->flags & mask) != flags) |
| continue; |
| #endif |
| switch (opt->type) { |
| case AV_OPT_TYPE_CONST: |
| /* Nothing to be done here */ |
| break; |
| case AV_OPT_TYPE_FLAGS: |
| case AV_OPT_TYPE_INT: { |
| int val; |
| val = opt->default_val.dbl; |
| av_opt_set_int(s, opt->name, val, 0); |
| } |
| break; |
| case AV_OPT_TYPE_INT64: |
| if ((double)(opt->default_val.dbl+0.6) == opt->default_val.dbl) |
| av_log(s, AV_LOG_DEBUG, "loss of precision in default of %s\n", opt->name); |
| av_opt_set_int(s, opt->name, opt->default_val.dbl, 0); |
| break; |
| case AV_OPT_TYPE_DOUBLE: |
| case AV_OPT_TYPE_FLOAT: { |
| double val; |
| val = opt->default_val.dbl; |
| av_opt_set_double(s, opt->name, val, 0); |
| } |
| break; |
| case AV_OPT_TYPE_RATIONAL: { |
| AVRational val; |
| val = av_d2q(opt->default_val.dbl, INT_MAX); |
| av_opt_set_q(s, opt->name, val, 0); |
| } |
| break; |
| case AV_OPT_TYPE_STRING: |
| av_opt_set(s, opt->name, opt->default_val.str, 0); |
| break; |
| case AV_OPT_TYPE_BINARY: |
| /* Cannot set default for binary */ |
| break; |
| default: |
| av_log(s, AV_LOG_DEBUG, "AVOption type %d of option %s not implemented yet\n", opt->type, opt->name); |
| } |
| } |
| } |
| |
| /** |
| * 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_opt_set() 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_opt_set(ctx, key, val, 0); |
| 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; |
| |
| if (!opts) |
| return 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; |
| } |
| |
| void av_opt_free(void *obj) |
| { |
| const AVOption *o = NULL; |
| while ((o = av_opt_next(obj, o))) |
| if (o->type == AV_OPT_TYPE_STRING || o->type == AV_OPT_TYPE_BINARY) |
| av_freep((uint8_t *)obj + o->offset); |
| } |
| |
| int av_opt_set_dict(void *obj, AVDictionary **options) |
| { |
| AVDictionaryEntry *t = NULL; |
| AVDictionary *tmp = NULL; |
| int ret = 0; |
| |
| while ((t = av_dict_get(*options, "", t, AV_DICT_IGNORE_SUFFIX))) { |
| ret = av_opt_set(obj, t->key, t->value, 0); |
| if (ret == AVERROR_OPTION_NOT_FOUND) |
| av_dict_set(&tmp, t->key, t->value, 0); |
| else if (ret < 0) { |
| av_log(obj, AV_LOG_ERROR, "Error setting option %s to value %s.\n", t->key, t->value); |
| break; |
| } |
| ret = 0; |
| } |
| av_dict_free(options); |
| *options = tmp; |
| return ret; |
| } |
| |
| const AVOption *av_opt_find(void *obj, const char *name, const char *unit, |
| int opt_flags, int search_flags) |
| { |
| return av_opt_find2(obj, name, unit, opt_flags, search_flags, NULL); |
| } |
| |
| const AVOption *av_opt_find2(void *obj, const char *name, const char *unit, |
| int opt_flags, int search_flags, void **target_obj) |
| { |
| const AVClass *c; |
| const AVOption *o = NULL; |
| |
| if(!obj) |
| return NULL; |
| |
| c= *(AVClass**)obj; |
| |
| if (search_flags & AV_OPT_SEARCH_CHILDREN) { |
| if (search_flags & AV_OPT_SEARCH_FAKE_OBJ) { |
| const AVClass *child = NULL; |
| while (child = av_opt_child_class_next(c, child)) |
| if (o = av_opt_find2(&child, name, unit, opt_flags, search_flags, NULL)) |
| return o; |
| } else { |
| void *child = NULL; |
| while (child = av_opt_child_next(obj, child)) |
| if (o = av_opt_find2(child, name, unit, opt_flags, search_flags, target_obj)) |
| return o; |
| } |
| } |
| |
| while (o = av_opt_next(obj, o)) { |
| if (!strcmp(o->name, name) && (o->flags & opt_flags) == opt_flags && |
| ((!unit && o->type != AV_OPT_TYPE_CONST) || |
| (unit && o->type == AV_OPT_TYPE_CONST && o->unit && !strcmp(o->unit, unit)))) { |
| if (target_obj) { |
| if (!(search_flags & AV_OPT_SEARCH_FAKE_OBJ)) |
| *target_obj = obj; |
| else |
| *target_obj = NULL; |
| } |
| return o; |
| } |
| } |
| return NULL; |
| } |
| |
| void *av_opt_child_next(void *obj, void *prev) |
| { |
| const AVClass *c = *(AVClass**)obj; |
| if (c->child_next) |
| return c->child_next(obj, prev); |
| return NULL; |
| } |
| |
| const AVClass *av_opt_child_class_next(const AVClass *parent, const AVClass *prev) |
| { |
| if (parent->child_class_next) |
| return parent->child_class_next(prev); |
| return NULL; |
| } |
| |
| void *av_opt_ptr(const AVClass *class, void *obj, const char *name) |
| { |
| const AVOption *opt= av_opt_find2(&class, name, NULL, 0, AV_OPT_SEARCH_FAKE_OBJ, NULL); |
| if(!opt) |
| return NULL; |
| return (uint8_t*)obj + opt->offset; |
| } |
| |
| #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), AV_OPT_TYPE_INT, {0}, 0, 100 }, |
| {"toggle", "set toggle", OFFSET(toggle), AV_OPT_TYPE_INT, {0}, 0, 1 }, |
| {"rational", "set rational", OFFSET(rational), AV_OPT_TYPE_RATIONAL, {0}, 0, 10 }, |
| {"string", "set string", OFFSET(string), AV_OPT_TYPE_STRING, {0}, CHAR_MIN, CHAR_MAX }, |
| {"flags", "set flags", OFFSET(flags), AV_OPT_TYPE_FLAGS, {0}, 0, INT_MAX, 0, "flags" }, |
| {"cool", "set cool flag ", 0, AV_OPT_TYPE_CONST, {TEST_FLAG_COOL}, INT_MIN, INT_MAX, 0, "flags" }, |
| {"lame", "set lame flag ", 0, AV_OPT_TYPE_CONST, {TEST_FLAG_LAME}, INT_MIN, INT_MAX, 0, "flags" }, |
| {"mu", "set mu flag ", 0, AV_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_defaults(&test_ctx); |
| 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 |
