tee_common.c

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/*
 * Tee common code
 * Copyright (c) 2012 Nicolas George
 *
 * 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
 */
 
#include <string.h>
 
#include "libavutil/error.h"
#include "libavutil/log.h"
#include "libavutil/opt.h"
 
#include "tee_common.h"
 
static const char *const slave_opt_open  = "[";
static const char *const slave_opt_close = "]";
static const char *const slave_opt_delim = ":]"; /* must have the close too */
 
int ff_tee_parse_slave_options(void *log, char *slave,
                               AVDictionary **options, char **filename)
{
    const char *p;
    char *key, *val;
    int ret;
 
    if (!strspn(slave, slave_opt_open)) {
        *filename = slave;
        return 0;
    }
    p = slave + 1;
    if (strspn(p, slave_opt_close)) {
        *filename = (char *)p + 1;
        return 0;
    }
    while (1) {
        ret = av_opt_get_key_value(&p, "=", slave_opt_delim, 0, &key, &val);
        if (ret < 0) {
            av_log(log, AV_LOG_ERROR, "No option found near \"%s\"\n", p);
            goto fail;
        }
        ret = av_dict_set(options, key, val,
                          AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);
        if (ret < 0)
            goto fail;
        if (strspn(p, slave_opt_close))
            break;
        if (!*p) {
            av_log(log, AV_LOG_ERROR, "Unterminated slave options in \"%s\"\n", slave);
            ret = AVERROR(EINVAL);
            goto fail;
        }
        p++;
    }
    *filename = (char *)p + 1;
    return 0;
 
fail:
    av_dict_free(options);
    return ret;
}