// --- initialization and deinitialization ---
/// <summary>Initializes audio. A call to Deinitialize must be made when terminating the program.</summary>
/// <returns>Whether initializing audio was successful.</returns>
internal static bool Initialize()
{
Deinitialize();
switch (Interface.CurrentOptions.SoundRange)
{
case Interface.SoundRange.Low:
OuterRadiusFactorMinimum = 2.0;
OuterRadiusFactorMaximum = 8.0;
OuterRadiusFactorMaximumSpeed = 1.0;
break;
case Interface.SoundRange.Medium:
OuterRadiusFactorMinimum = 4.0;
OuterRadiusFactorMaximum = 16.0;
OuterRadiusFactorMaximumSpeed = 2.0;
break;
case Interface.SoundRange.High:
OuterRadiusFactorMinimum = 6.0;
OuterRadiusFactorMaximum = 24.0;
OuterRadiusFactorMaximumSpeed = 3.0;
break;
}
OuterRadiusFactor = Math.Sqrt(OuterRadiusFactorMinimum * OuterRadiusFactorMaximum);
OuterRadiusFactorSpeed = 0.0;
OpenAlDevice = Alc.alcOpenDevice(null);
if (OpenAlDevice != IntPtr.Zero)
{
OpenAlContext = Alc.alcCreateContext(OpenAlDevice, IntPtr.Zero);
if (OpenAlContext != IntPtr.Zero)
{
Alc.alcMakeContextCurrent(OpenAlContext);
try {
Al.alSpeedOfSound(343.0f);
} catch {
MessageBox.Show("OpenAL 1.1 is required. You seem to have OpenAL 1.0.", "openBVE", MessageBoxButtons.OK, MessageBoxIcon.Hand);
}
Al.alDistanceModel(Al.AL_NONE);
return(true);
}
else
{
Alc.alcCloseDevice(OpenAlDevice);
OpenAlDevice = IntPtr.Zero;
MessageBox.Show("The OpenAL context could not be created.", "openBVE", MessageBoxButtons.OK, MessageBoxIcon.Hand);
return(false);
}
}
else
{
OpenAlContext = IntPtr.Zero;
MessageBox.Show("The OpenAL sound device could not be opened.", "openBVE", MessageBoxButtons.OK, MessageBoxIcon.Hand);
return(false);
}
}
// deinitialize
internal static void Deinitialize()
{
if (OpenAlContext != IntPtr.Zero)
{
SoundManager.StopAllSounds(true);
SoundManager.UnuseAllSoundsBuffers();
Alc.alcMakeContextCurrent(IntPtr.Zero);
Alc.alcDestroyContext(OpenAlContext);
OpenAlContext = IntPtr.Zero;
}
if (OpenAlDevice != IntPtr.Zero)
{
Alc.alcCloseDevice(OpenAlDevice);
OpenAlDevice = IntPtr.Zero;
}
}
/// <summary>Deinitializes audio.</summary>
internal static void Deinitialize()
{
StopAllSounds();
UnloadAllBuffers();
if (OpenAlContext != IntPtr.Zero)
{
Alc.alcMakeContextCurrent(IntPtr.Zero);
Alc.alcDestroyContext(OpenAlContext);
OpenAlContext = IntPtr.Zero;
}
if (OpenAlDevice != IntPtr.Zero)
{
Alc.alcCloseDevice(OpenAlDevice);
OpenAlDevice = IntPtr.Zero;
}
}
// initialize
internal static void Initialize()
{
// openal
OpenAlDevice = Alc.alcOpenDevice(null);
if (OpenAlDevice != IntPtr.Zero)
{
OpenAlContext = Alc.alcCreateContext(OpenAlDevice, IntPtr.Zero);
if (OpenAlContext != IntPtr.Zero)
{
Alc.alcMakeContextCurrent(OpenAlContext);
Al.alSpeedOfSound(343.0f);
Al.alDistanceModel(Al.AL_NONE);
}
else
{
Alc.alcCloseDevice(OpenAlDevice);
OpenAlDevice = IntPtr.Zero;
System.Windows.Forms.MessageBox.Show("The sound device could be opened, but the sound context could not be created.", "openBVE", System.Windows.Forms.MessageBoxButtons.OK, System.Windows.Forms.MessageBoxIcon.Hand);
}
}
else
{
OpenAlContext = IntPtr.Zero;
System.Windows.Forms.MessageBox.Show("The sound device could not be opened.", "openBVE", System.Windows.Forms.MessageBoxButtons.OK, System.Windows.Forms.MessageBoxIcon.Hand);
}
// outer radius
switch (Interface.CurrentOptions.SoundRange)
{
case Interface.SoundRange.Low:
OuterRadiusFactorMinimum = 2.0;
OuterRadiusFactorMaximum = 8.0;
break;
case Interface.SoundRange.Medium:
OuterRadiusFactorMinimum = 4.0;
OuterRadiusFactorMaximum = 16.0;
break;
case Interface.SoundRange.High:
OuterRadiusFactorMinimum = 8.0;
OuterRadiusFactorMaximum = 32.0;
break;
}
OuterRadiusFactor = OuterRadiusFactorMaximum;
}
protected override void ShutdownLibrary()
{
if (thread != null)
{
needAbortThread = true;
Thread.Sleep(50);
thread.Abort();
}
if (realChannels != null)
{
foreach (OpenALRealChannel realChannel in realChannels)
{
if (realChannel.alSource != 0)
{
Al.alDeleteSources(1, ref realChannel.alSource);
realChannel.alSource = 0;
}
}
}
try
{
Alc.alcMakeContextCurrent(IntPtr.Zero);
Alc.alcDestroyContext(alContext);
Alc.alcCloseDevice(alDevice);
}
catch { }
if (realChannels != null)
{
realChannels.Clear();
realChannels = null;
}
if (criticalSection != null)
{
criticalSection.Dispose();
criticalSection = null;
}
instance = null;
}