alc/backends/loopback.cpp

   1 /**
   2  * OpenAL cross platform audio library
   3  * Copyright (C) 2011 by Chris Robinson
   4  * This library is free software; you can redistribute it and/or
   5  *  modify it under the terms of the GNU Library General Public
   6  *  License as published by the Free Software Foundation; either
   7  *  version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  *  Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  *  License along with this library; if not, write to the
  16  *  Free Software Foundation, Inc.,
  17  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  * Or go to http://www.gnu.org/copyleft/lgpl.html
  19  */
  20
  21 #include "config.h"
  22
  23 #include "backends/loopback.h"
  24
  25 #include "alcmain.h"
  26 #include "alu.h"
  27
  28
  29 namespace {
  30
  31 struct LoopbackBackend final : public BackendBase {
  32     LoopbackBackend(ALCdevice *device) noexcept : BackendBase{device} { }
  33
  34     ALCenum open(const ALCchar *name) override;
  35     bool reset() override;
  36     bool start() override;
  37     void stop() override;
  38
  39     DEF_NEWDEL(LoopbackBackend)
  40 };
  41
  42
  43 ALCenum LoopbackBackend::open(const ALCchar *name)
  44 {
  45     mDevice->DeviceName = name;
  46     return ALC_NO_ERROR;
  47 }
  48
  49 bool LoopbackBackend::reset()
  50 {
  51     SetDefaultWFXChannelOrder(mDevice);
  52     return true;
  53 }
  54
  55 bool LoopbackBackend::start()
  56 { return true; }
  57
  58 void LoopbackBackend::stop()
  59 { }
  60
  61 } // namespace
  62
  63
  64 bool LoopbackBackendFactory::init()
  65 { return true; }
  66
  67 bool LoopbackBackendFactory::querySupport(BackendType)
  68 { return true; }
  69
  70 void LoopbackBackendFactory::probe(DevProbe, std::string*)
  71 { }
  72
  73 BackendPtr LoopbackBackendFactory::createBackend(ALCdevice *device, BackendType)
  74 { return BackendPtr{new LoopbackBackend{device}}; }
  75
  76 BackendFactory &LoopbackBackendFactory::getFactory()
  77 {
  78     static LoopbackBackendFactory factory{};
  79     return factory;
  80 }