src/Audio/SLES/Init.hpp

   1 /*
   2 Copyright_License {
   3
   4   XCSoar Glide Computer - http://www.xcsoar.org/
   5   Copyright (C) 2000-2013 The XCSoar Project
   6   A detailed list of copyright holders can be found in the file "AUTHORS".
   7
   8   This program is free software; you can redistribute it and/or
   9   modify it under the terms of the GNU General Public License
  10   as published by the Free Software Foundation; either version 2
  11   of the License, or (at your option) any later version.
  12
  13   This program is distributed in the hope that it will be useful,
  14   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16   GNU General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with this program; if not, write to the Free Software
  20   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  21 }
  22 */
  23
  24 /** \file
  25  *
  26  * Basic support for OpenSL/ES for native audio playback on Android.
  27  * Since OpenSL/ES was added with API version 9 (Android 2.3), we have
  28  * to load it dynamically to stay compatible with previous Android
  29  * versions.
  30  */
  31
  32 #ifndef XCSOAR_AUDIO_SLES_INIT_HPP
  33 #define XCSOAR_AUDIO_SLES_INIT_HPP
  34
  35 #include <SLES/OpenSLES.h>
  36
  37 namespace SLES {
  38   extern const SLInterfaceID *IID_ENGINE, *IID_PLAY,
  39     *IID_ANDROIDSIMPLEBUFFERQUEUE;
  40
  41   /**
  42    * Attempt to load libOpenSLES.so with dlopen(), and look up the SLES
  43    * functions which we need.
  44    *
  45    * @return true if libOpenSLES.so is available
  46    */
  47   bool
  48   Initialise();
  49
  50   /**
  51    * Wrapper for slCreateEngine().  Returns an error when Initialise()
  52    * has failed.
  53    */
  54   SLresult
  55   CreateEngine(SLObjectItf *pEngine, SLuint32 numOptions,
  56                const SLEngineOption *pEngineOptions,
  57                SLuint32 numInterfaces, const SLInterfaceID *pInterfaceIds,
  58                const SLboolean *pInterfaceRequired);
  59 }
  60
  61 #endif