libavformat/tee_common.c

   1 /*
   2  * Tee common code
   3  * Copyright (c) 2012 Nicolas George
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public License
   9  * as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * FFmpeg is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public License
  18  * along with FFmpeg; if not, write to the Free Software * Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #include <string.h>
  23
  24 #include "libavutil/log.h"
  25 #include "libavutil/opt.h"
  26
  27 #include "tee_common.h"
  28
  29 static const char *const slave_opt_open  = "[";
  30 static const char *const slave_opt_close = "]";
  31 static const char *const slave_opt_delim = ":]"; /* must have the close too */
  32
  33 int ff_tee_parse_slave_options(void *log, char *slave,
  34                                AVDictionary **options, char **filename)
  35 {
  36     const char *p;
  37     char *key, *val;
  38     int ret;
  39
  40     if (!strspn(slave, slave_opt_open)) {
  41         *filename = slave;
  42         return 0;
  43     }
  44     p = slave + 1;
  45     if (strspn(p, slave_opt_close)) {
  46         *filename = (char *)p + 1;
  47         return 0;
  48     }
  49     while (1) {
  50         ret = av_opt_get_key_value(&p, "=", slave_opt_delim, 0, &key, &val);
  51         if (ret < 0) {
  52             av_log(log, AV_LOG_ERROR, "No option found near \"%s\"\n", p);
  53             goto fail;
  54         }
  55         ret = av_dict_set(options, key, val,
  56                           AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);
  57         if (ret < 0)
  58             goto fail;
  59         if (strspn(p, slave_opt_close))
  60             break;
  61         p++;
  62     }
  63     *filename = (char *)p + 1;
  64     return 0;
  65
  66 fail:
  67     av_dict_free(options);
  68     return ret;
  69 }