public SoundBuffer()
{
AL10.alGenBuffers(1, out _handle);
ALUtils.CheckALError("unable to create sound buffer");
if (_handle == 0)
{
throw new AudioException("Unable to create OpenAL sound buffer");
}
}
private void dispose(bool disposing)
{
if (!_isDisposed)
{
if (_handle != 0 && !AudioEngine.IsShutdown)
{
AL10.alDeleteBuffers(1, ref _handle);
ALUtils.CheckALError("unable to destroy sound buffer");
_handle = 0;
}
_isDisposed = true;
}
}
internal void SetData(IntPtr data, AudioFormat fmt, uint hz, uint size)
{
AL10.alBufferData(_handle, (int)fmt, data, (int)size, (int)hz);
ALUtils.CheckALError("unable to set audio buffer data");
AL10.alGetBufferi(_handle, AL10.AL_BITS, out int bits);
AL10.alGetBufferi(_handle, AL10.AL_CHANNELS, out int channels);
AL10.alGetBufferi(_handle, AL10.AL_SIZE, out int unpackedSize);
Format = fmt;
DataSize = (uint)unpackedSize;
Duration = TimeSpan.FromSeconds((double)(unpackedSize / ((bits / 8) * channels)) / hz);
}
public static void Initialize()
{
// Populate the device lists
PlaybackDevice.PopulateDeviceList();
if (PlaybackDevice.Devices.Count == 0)
{
throw new AudioException("There are no audio playback devices available");
}
LDEBUG("Available audio playback devices:");
foreach (var dev in PlaybackDevice.Devices)
{
LDEBUG($" {dev.Identifier}");
}
// Open the default playback device
Device = ALC10.alcOpenDevice(PlaybackDevice.Devices[0].Identifier);
ALUtils.CheckALCError();
if (Device == IntPtr.Zero)
{
throw new AudioException("Unable to open default audio playback device");
}
// Create the al context and set it as active
Context = ALC10.alcCreateContext(Device, new int[2] {
0, 0
}); // Two 0s tell OpenAL no special attribs
ALUtils.CheckALCError();
if (Context == IntPtr.Zero)
{
throw new AudioException("Unable to create audio context");
}
ALC10.alcMakeContextCurrent(Context);
ALUtils.CheckALCError();
// Generate audio sources
AL10.alGenSources(MAX_SOURCE_COUNT, s_allSources);
ALUtils.CheckALError("unable to generate audio sources");
foreach (var src in s_allSources)
{
s_availableSources.Push(src);
}
// Report
LINFO("Started OpenAL audio engine.");
LINFO($" Device: {PlaybackDevice.Devices[0].Identifier}.");
}
public static void Shutdown()
{
// Destroy the sources
AL10.alDeleteSources(MAX_SOURCE_COUNT, s_allSources);
ALUtils.CheckALError("unable to free audio sources");
s_availableSources.Clear();
s_usedSources.Clear();
// Destroy the context, and then close the device
ALC10.alcMakeContextCurrent(IntPtr.Zero);
ALUtils.CheckALCError();
ALC10.alcDestroyContext(Context);
ALUtils.CheckALCError();
Context = IntPtr.Zero;
ALC10.alcCloseDevice(Device);
ALUtils.CheckALCError();
Device = IntPtr.Zero;
IsShutdown = true;
// Report
LINFO("Shutdown OpenAL audio engine.");
}
internal static void PopulateDeviceList()
{
string[] dnames = ALUtils.GetALCString(ALC11.ALC_ALL_DEVICES_SPECIFIER, 0).Split('\n');
s_devices.AddRange(dnames.Select(name => new PlaybackDevice(name)));
}
