audio subsystem replacement: openal audio renderer and buffer class, removed deprecated files

audiorenderer.cpp

@@ -0,0 +1,83 @@
+/*
+This Source Code Form is subject to the
+terms of the Mozilla Public License, v.
+2.0. If a copy of the MPL was not
+distributed with this file, You can
+obtain one at
+http://mozilla.org/MPL/2.0/.
+*/
+
+#include "stdafx.h"
+
+#include "audiorenderer.h"
+#include "logs.h"
+
+namespace audio {
+
+openal_renderer renderer;
+
+openal_renderer::~openal_renderer() {
+
+    ::alcMakeContextCurrent( nullptr );
+
+    if( m_context != nullptr ) { ::alcDestroyContext( m_context ); }
+    if( m_device != nullptr )  { ::alcCloseDevice( m_device ); }
+}
+
+buffer_handle
+openal_renderer::fetch_buffer( std::string const &Filename ) {
+
+    return m_buffers.create( Filename );
+}
+
+// initializes the service
+bool
+openal_renderer::init() {
+
+    if( true == m_ready ) {
+        // already initialized and enabled
+        return true;
+    }
+    if( false == init_caps() ) {
+        // basic initialization failed
+        return false;
+    }
+
+    m_ready = true;
+    return true;
+}
+
+bool
+openal_renderer::init_caps() {
+
+    // select the "preferred device"
+    // TODO: support for opening config-specified device
+    m_device = ::alcOpenDevice( nullptr );
+    if( m_device == nullptr ) {
+        ErrorLog( "Failed to obtain audio device" );
+        return false;
+    }
+
+    ALCint versionmajor, versionminor;
+    ::alcGetIntegerv( m_device, ALC_MAJOR_VERSION, 1, &versionmajor );
+    ::alcGetIntegerv( m_device, ALC_MINOR_VERSION, 1, &versionminor );
+    auto const oalversion { std::to_string( versionmajor ) + "." + std::to_string( versionminor ) };
+
+    WriteLog(
+        "Audio Renderer: " + std::string { (char *)::alcGetString( m_device, ALC_DEVICE_SPECIFIER ) }
+        + " OpenAL Version: " + oalversion );
+
+    WriteLog( "Supported extensions: " + std::string{ (char *)::alcGetString( m_device, ALC_EXTENSIONS ) } );
+
+    m_context = ::alcCreateContext( m_device, nullptr );
+    if( m_context == nullptr ) {
+        ErrorLog( "Failed to create audio context" );
+        return false;
+    }
+
+    return ( ::alcMakeContextCurrent( m_context ) == AL_TRUE );
+}
+
+} // audio
+
+//---------------------------------------------------------------------------