public SDLAudio ()
{
this.on = Settings.Audio_PlaybackEnabled;
if (on) {
try {
Mixer.Initialize ();
// TODO: find another way to adjust volume
this.Volume = Settings.Audio_PlaybackVolume;
callback = new AudioCallback (Signed16BigCallback);
audio_stream = new AudioStream (Settings.Audio_PlaybackFrequency,
AudioFormat.Signed16Big,
SoundChannel.Mono, 2205, callback, "My Nes Sound");
samples_buffer = new short[samples_count];
Mixer.OpenAudio (audio_stream);
audio_stream.Paused = true;
r_pos = w_pos = 0;
} catch (Exception ex) {
Console.WriteLine (ex.ToString ());
}
}
recorder = new WaveRecorder ();
}
//static void CheckOpenStatus()
//{
// if (!audioOpen)
// {
// throw new AudioException(Events.StringManager.GetString("OpenAudioNotInit", CultureInfo.CurrentUICulture));
// }
//}
internal static void CheckOpenStatus(AudioStream stream)
{
if (!audioOpen)
{
Mixer.OpenAudio(stream);
audioOpen = true;
}
}
/// <summary>
/// Open Audio device
/// </summary>
/// <param name="stream">stream to open</param>
public static void OpenAudio(AudioStream stream)
{
Close();
if (stream == null)
{
throw new ArgumentNullException("stream");
}
IntPtr pSpec = Marshal.AllocHGlobal(Marshal.SizeOf(stream.Spec));
try
{
Marshal.StructureToPtr(stream.Spec, pSpec, false);
if (Sdl.SDL_OpenAudio(pSpec, IntPtr.Zero) < 0)
{
throw new AudioException();
}
stream.Spec = (Sdl.SDL_AudioSpec)Marshal.PtrToStructure(pSpec, typeof(Sdl.SDL_AudioSpec));
if (((ushort)stream.Spec.format & 0x8000) == 0x8000) // signed
{
stream.Offset = 0;
}
else
{
stream.Offset = 2 << ((byte)stream.Spec.format - 2);
}
Mixer.AudioOpen = true;
}
finally
{
Marshal.FreeHGlobal(pSpec);
}
}
private void Go()
{
if (File.Exists(fileName))
{
filePath = "";
fileDirectory = "";
}
else if (File.Exists(Path.Combine(fileDirectory, fileName)))
{
filePath = "";
}
string file = Path.Combine(Path.Combine(filePath, fileDirectory), fileName);
textDisplay = new TextSprite(" ", new SdlDotNet.Graphics.Font(file, 20), Color.Red);
Video.WindowIcon();
Video.WindowCaption = "SDL.NET - StreamingAudio";
screen = Video.SetVideoMode(width, height);
switch (streamChoice)
{
case StreamChoice.InternalCallback:
stream = new AudioStream(playbackFreq, AudioFormat.Unsigned16Little, SoundChannel.Mono, samples);
buffer16 = new short[samples];
break;
case StreamChoice.CustomCallback:
callback = new AudioCallback(Unsigned16LittleCallback);
stream = new AudioStream(playbackFreq, AudioFormat.Unsigned16Little, SoundChannel.Mono, samples, callback, "Hello World");
buffer16 = new short[samples];
break;
case StreamChoice.CustomCallback8Bit:
callback = new AudioCallback(Unsigned8Callback);
stream = new AudioStream(playbackFreq, AudioFormat.Unsigned8, SoundChannel.Mono, samples, new AudioCallback(Unsigned8Callback), "Hello World");
buffer8 = new byte[samples];
break;
default:
stream = new AudioStream(playbackFreq, AudioFormat.Unsigned16Little, SoundChannel.Mono, samples);
buffer16 = new short[samples];
break;
}
offset = stream.Offset;
volume = 0.9 * 32768;
buffer16 = new short[samples];
osc.Rate = 20;
osc.Amplitude = 1;
osc2.Rate = 3;
osc2.Amplitude = 10;
stream.Paused = false;
textDisplay.Text = SdlDotNetExamplesBrowser.StringManager.GetString(
"StreamingAudioDirections", CultureInfo.CurrentUICulture);
textDisplay.TextWidth = 350;
Events.Run();
}
/// <summary>
///
/// </summary>
/// <param name="disposing"></param>
protected virtual void Dispose(bool disposing)
{
if (!this.disposed)
{
if (disposing)
{
if (this.textDisplay != null)
{
this.textDisplay.Dispose();
this.textDisplay = null;
}
if (this.stream != null)
{
this.stream.Dispose();
this.stream = null;
}
}
this.disposed = true;
}
}
