Function parse_key_value_pair

libavutil/opt.c:1787–1819

* 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 u

 * 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 entry with key '%s' to value '%s'\n", key, val);

    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)