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 "libavutil/avutil.h"
  23 #include "libavutil/avstring.h"
  24 #include "libavutil/opt.h"
  25
  26 #include "tee_common.h"
  27
  28 static const char *const slave_opt_open  = "[";
  29 static const char *const slave_opt_close = "]";
  30 static const char *const slave_opt_delim = ":]"; /* must have the close too */
  31
  32 int ff_tee_parse_slave_options(void *log, char *slave,
  33                                AVDictionary **options, char **filename)
  34 {
  35     const char *p;
  36     char *key, *val;
  37     int ret;
  38
  39     if (!strspn(slave, slave_opt_open)) {
  40         *filename = slave;
  41         return 0;
  42     }
  43     p = slave + 1;
  44     if (strspn(p, slave_opt_close)) {
  45         *filename = (char *)p + 1;
  46         return 0;
  47     }
  48     while (1) {
  49         ret = av_opt_get_key_value(&p, "=", slave_opt_delim, 0, &key, &val);
  50         if (ret < 0) {
  51             av_log(log, AV_LOG_ERROR, "No option found near \"%s\"\n", p);
  52             goto fail;
  53         }
  54         ret = av_dict_set(options, key, val,
  55                           AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);
  56         if (ret < 0)
  57             goto fail;
  58         if (strspn(p, slave_opt_close))
  59             break;
  60         p++;
  61     }
  62     *filename = (char *)p + 1;
  63     return 0;
  64
  65 fail:
  66     av_dict_free(options);
  67     return ret;
  68 }