Пример #1
0
		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 ();
		}
Пример #2
0
 //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;
     }
 }
Пример #3
0
        /// <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);
            }
        }
Пример #4
0
        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();
        }
Пример #5
0
 /// <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;
     }
 }