Function set_string_number

libavutil/opt.c:420–512

                             : opt->default_val.dbl)

static int set_string_number(void *obj, void *target_obj, const AVOption *o, const char *val, void *dst)
{
    const enum AVOptionType type = TYPE_BASE(o->type);
    int ret = 0;

    if (type == AV_OPT_TYPE_RATIONAL || type == AV_OPT_TYPE_VIDEO_RATE) {
        int num, den;
        char c;
        if (sscanf(val, "%d%*1[:/]%d%c", &num, &den, &c) == 2) {
            if ((ret = write_number(obj, o, dst, 1, den, num)) >= 0)
                return ret;
            ret = 0;
        }
    }

    for (;;) {
        int i = 0;
        char buf[256];
        int cmd = 0;
        double d;
        int64_t intnum = 1;

        if (type == AV_OPT_TYPE_FLAGS) {
            if (*val == '+' || *val == '-')
                cmd = *(val++);
            for (; i < sizeof(buf) - 1 && val[i] && val[i] != '+' && val[i] != '-'; i++)
                buf[i] = val[i];
            buf[i] = 0;
        }

        {
            int res;
            int ci = 0;
            double const_values[64];
            const char * const_names[64];
            int search_flags = (o->flags & AV_OPT_FLAG_CHILD_CONSTS) ? AV_OPT_SEARCH_CHILDREN : 0;
            const AVOption *o_named = av_opt_find(target_obj, i ? buf : val, o->unit, 0, search_flags);
            if (o_named && o_named->type == AV_OPT_TYPE_CONST) {
                d = DEFAULT_NUMVAL(o_named);
                if (o_named->flags & AV_OPT_FLAG_DEPRECATED)
                    av_log(obj, AV_LOG_WARNING, "The \"%s\" option is deprecated: %s\n",
                           o_named->name, o_named->help);
            } else {
                if (o->unit) {
                    for (o_named = NULL; o_named = av_opt_next(target_obj, o_named); ) {
                        if (o_named->type == AV_OPT_TYPE_CONST &&
                            o_named->unit &&
                            !strcmp(o_named->unit, o->unit)) {
                            if (ci + 6 >= FF_ARRAY_ELEMS(const_values)) {
                                av_log(obj, AV_LOG_ERROR, "const_values array too small for %s\n", o->unit);
                                return AVERROR_PATCHWELCOME;
                            }
                            const_names [ci  ] = o_named->name;
                            const_values[ci++] = DEFAULT_NUMVAL(o_named);
                        }
                    }
                }
                const_names [ci  ] = "default";