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-rw-r--r--media/libav/libavutil/opt.c847
1 files changed, 847 insertions, 0 deletions
diff --git a/media/libav/libavutil/opt.c b/media/libav/libavutil/opt.c
new file mode 100644
index 000000000..059c525c3
--- /dev/null
+++ b/media/libav/libavutil/opt.c
@@ -0,0 +1,847 @@
+/*
+ * AVOptions
+ * Copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; 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 "common.h"
+#include "opt.h"
+#include "eval.h"
+#include "dict.h"
+#include "log.h"
+#include "mathematics.h"
+
+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;
+ }
+ return AVERROR(EINVAL);
+}
+
+static int write_number(void *obj, const AVOption *o, void *dst, double num, int den, int64_t intnum)
+{
+ if (o->type != AV_OPT_TYPE_FLAGS &&
+ (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);
+ if (!ptr)
+ return AVERROR(ENOMEM);
+ 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;
+}
+
+#define DEFAULT_NUMVAL(opt) ((opt->type == AV_OPT_TYPE_INT64 || \
+ opt->type == AV_OPT_TYPE_CONST || \
+ opt->type == AV_OPT_TYPE_FLAGS || \
+ opt->type == AV_OPT_TYPE_INT) ? \
+ opt->default_val.i64 : opt->default_val.dbl)
+
+static int set_string_number(void *obj, void *target_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;
+
+ i = 0;
+ if (*val == '+' || *val == '-') {
+ if (o->type == AV_OPT_TYPE_FLAGS)
+ cmd = *(val++);
+ else if (!notfirst)
+ buf[i++] = *val;
+ }
+
+ for (; 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(target_obj, buf, o->unit, 0, 0);
+ if (o_named && o_named->type == AV_OPT_TYPE_CONST)
+ d = DEFAULT_NUMVAL(o_named);
+ else if (!strcmp(buf, "default")) d = DEFAULT_NUMVAL(o);
+ 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;
+}
+
+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->flags & AV_OPT_FLAG_READONLY)
+ 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, target_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 || o->flags & AV_OPT_FLAG_READONLY)\
+ return AVERROR(EINVAL);\
+ return set_string_number(obj, 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;
+
+ if (o->flags & AV_OPT_FLAG_READONLY)
+ return AVERROR(EINVAL);
+
+ dst = ((uint8_t*)target_obj) + o->offset;
+ return write_number(obj, o, dst, num, den, intnum);
+}
+
+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);
+}
+
+int av_opt_set_bin(void *obj, const char *name, const uint8_t *val, int len, int search_flags)
+{
+ void *target_obj;
+ const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
+ uint8_t *ptr;
+ uint8_t **dst;
+ int *lendst;
+
+ if (!o || !target_obj)
+ return AVERROR_OPTION_NOT_FOUND;
+
+ if (o->type != AV_OPT_TYPE_BINARY || o->flags & AV_OPT_FLAG_READONLY)
+ return AVERROR(EINVAL);
+
+ ptr = av_malloc(len);
+ if (!ptr)
+ return AVERROR(ENOMEM);
+
+ dst = (uint8_t **)(((uint8_t *)target_obj) + o->offset);
+ lendst = (int *)(dst + 1);
+
+ av_free(*dst);
+ *dst = ptr;
+ *lendst = len;
+ memcpy(ptr, val, len);
+
+ return 0;
+}
+
+int av_opt_set_dict_val(void *obj, const char *name, const AVDictionary *val, int search_flags)
+{
+ void *target_obj;
+ AVDictionary **dst;
+ const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
+
+ if (!o || !target_obj)
+ return AVERROR_OPTION_NOT_FOUND;
+ if (o->flags & AV_OPT_FLAG_READONLY)
+ return AVERROR(EINVAL);
+
+ dst = (AVDictionary **)(((uint8_t *)target_obj) + o->offset);
+ av_dict_free(dst);
+ av_dict_copy(dst, val, 0);
+
+ return 0;
+}
+
+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)
+ 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_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, 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;
+
+ return read_number(o, dst, num, den, intnum);
+
+error:
+ *den=*intnum=0;
+ return -1;
+}
+
+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, &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, &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, &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_get_dict_val(void *obj, const char *name, int search_flags, AVDictionary **out_val)
+{
+ void *target_obj;
+ AVDictionary *src;
+ const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
+
+ if (!o || !target_obj)
+ return AVERROR_OPTION_NOT_FOUND;
+ if (o->type != AV_OPT_TYPE_DICT)
+ return AVERROR(EINVAL);
+
+ src = *(AVDictionary **)(((uint8_t *)target_obj) + o->offset);
+ av_dict_copy(out_val, src, 0);
+
+ 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 & flag->default_val.i64;
+}
+
+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' : '.');
+ av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_EXPORT) ? 'X' : '.');
+ av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_READONLY) ? 'R' : '.');
+
+ 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)
+{
+ const AVOption *opt = NULL;
+ while ((opt = av_opt_next(s, opt))) {
+ if (opt->flags & AV_OPT_FLAG_READONLY)
+ continue;
+
+ switch (opt->type) {
+ case AV_OPT_TYPE_CONST:
+ /* Nothing to be done here */
+ break;
+ case AV_OPT_TYPE_FLAGS:
+ case AV_OPT_TYPE_INT:
+ case AV_OPT_TYPE_INT64:
+ av_opt_set_int(s, opt->name, opt->default_val.i64, 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:
+ case AV_OPT_TYPE_DICT:
+ /* Cannot set defaults for these types */
+ 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)
+ return AVERROR(ENOMEM);
+
+ if (*key && strspn(*buf, key_val_sep)) {
+ (*buf)++;
+ val = av_get_token(buf, pairs_sep);
+ if (!val) {
+ av_freep(&key);
+ return AVERROR(ENOMEM);
+ }
+ } 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, AV_OPT_SEARCH_CHILDREN);
+ 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))) {
+ switch (o->type) {
+ case AV_OPT_TYPE_STRING:
+ case AV_OPT_TYPE_BINARY:
+ av_freep((uint8_t *)obj + o->offset);
+ break;
+
+ case AV_OPT_TYPE_DICT:
+ av_dict_free((AVDictionary **)(((uint8_t *)obj) + o->offset));
+ break;
+
+ default:
+ break;
+ }
+ }
+}
+
+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 = *(AVClass**)obj;
+ const AVOption *o = NULL;
+
+ if (!c)
+ return NULL;
+
+ 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->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;
+}
+
+#ifdef TEST
+
+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, {.i64 = 0}, 0, 100 },
+{"toggle", "set toggle", OFFSET(toggle), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1 },
+{"rational", "set rational", OFFSET(rational), AV_OPT_TYPE_RATIONAL, {.dbl = 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, {.i64 = 0}, 0, INT_MAX, 0, "flags" },
+{"cool", "set cool flag ", 0, AV_OPT_TYPE_CONST, {.i64 = TEST_FLAG_COOL}, INT_MIN, INT_MAX, 0, "flags" },
+{"lame", "set lame flag ", 0, AV_OPT_TYPE_CONST, {.i64 = TEST_FLAG_LAME}, INT_MIN, INT_MAX, 0, "flags" },
+{"mu", "set mu flag ", 0, AV_OPT_TYPE_CONST, {.i64 = 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
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-24 22:57:21 +0000