src/api/media_stream_select.c

   1 /* libquvi
   2  * Copyright (C) 2012-2013  Toni Gundogdu <legatvs@gmail.com>
   3  *
   4  * This file is part of libquvi <http://quvi.sourceforge.net/>.
   5  *
   6  * This library is free software: you can redistribute it and/or
   7  * modify it under the terms of the GNU Affero General Public
   8  * License as published by the Free Software Foundation, either
   9  * version 3 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU Affero General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Affero General
  17  * Public License along with this library.  If not, see
  18  * <http://www.gnu.org/licenses/>.
  19  */
  20
  21 /** @file media_stream_select.c */
  22
  23 #include "config.h"
  24
  25 #include <glib/gi18n-lib.h>
  26 #include <glib.h>
  27
  28 #include "quvi.h"
  29 /* -- */
  30 #include "_quvi_s.h"
  31 #include "_quvi_media_s.h"
  32 /* -- */
  33 #include "misc/re.h"
  34
  35 static QuviError _select(_quvi_media_t qm, const gchar *id)
  36 {
  37   _quvi_media_stream_t qms;
  38   gboolean found_flag;
  39   QuviError rc;
  40   gchar **r;
  41   gint i;
  42
  43   quvi_media_stream_reset(qm);
  44
  45   r = g_strsplit(id, ",", 0);
  46   found_flag = FALSE;
  47   rc = QUVI_OK;
  48
  49   for (i=0; (r[i] != NULL && found_flag == FALSE); ++i)
  50     {
  51       if (g_strcmp0(r[i], "croak") ==0)
  52         {
  53           rc = QUVI_ERROR_KEYWORD_CROAK;
  54           break;
  55         }
  56       else if (g_strcmp0(r[i], "best") == 0)
  57         {
  58           quvi_media_stream_choose_best(qm);
  59           break;
  60         }
  61       else
  62         {
  63           while (quvi_media_stream_next(qm) == QUVI_TRUE)
  64             {
  65               /* TODO: Use quvi_media_get? */
  66               qms = (_quvi_media_stream_t) qm->curr.stream->data;
  67
  68               found_flag = m_match(qms->id->str, r[i]);
  69               if (found_flag == TRUE)
  70                 break;
  71             }
  72
  73           if (found_flag == FALSE) /* Use the first stream as a fallback. */
  74             quvi_media_stream_reset(qm);
  75         }
  76     }
  77   g_strfreev(r);
  78   return (rc);
  79 }
  80
  81 /** @brief Select a @ref m_stream matching a @ref m_stream_id
  82
  83 Matches the @ref m_stream_id (pattern) to the available media stream
  84 IDs and selects the stream. This function returns immediately
  85 if a matching ID was found.  The ID value may be a comma-separated value
  86 (e.g. "foo,bar,baz"). The ID may also contain the keywords 'croak' and
  87 'best' (see the notes below).
  88 @note
  89   - ID value is used as regular expression pattern
  90   - ID may contain the reserved keyword 'best'
  91     - Defining this in the ID is identical to calling
  92       @ref quvi_media_stream_choose_best, refer to it for details
  93   - ID may contain the reserved keyword 'croak'
  94     - This will cause the function to exit immediately when it is reached
  95     - The result may be checked with @ref quvi_ok
  96       - The code may be retrieved using @ref quvi_get
  97       - The error message may be retrieved using @ref quvi_errmsg
  98   - If nothing matched (and the 'croak' keyword was specified) the
  99     function will return the first (default) available language
 100   - Always confirm the result with @ref quvi_ok
 101 @sa @ref parse_media
 102 @ingroup mediaprop
 103 */
 104 void quvi_media_stream_select(quvi_media_t handle, const char *id)
 105 {
 106   _quvi_media_t qm;
 107   _quvi_t q;
 108
 109   /* If G_DISABLE_CHECKS is defined then the check is not performed. */
 110   g_return_if_fail(handle != NULL);
 111
 112   qm = (_quvi_media_t) handle;
 113   q = qm->handle.quvi;
 114
 115   q->status.rc = _select(qm, id);
 116 }
 117
 118 /* vim: set ts=2 sw=2 tw=72 expandtab: */