90 lines
2.6 KiB
C#
90 lines
2.6 KiB
C#
using System;
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using System.IO;
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using ANX.Framework.Audio;
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using ANX.Framework.NonXNA.Development;
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using ANX.Framework.NonXNA.SoundSystem;
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using OpenTK.Audio.OpenAL;
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using WaveUtils;
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using ALFormat = OpenTK.Audio.OpenAL.ALFormat;
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// This file is part of the ANX.Framework created by the
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// "ANX.Framework developer group" and released under the Ms-PL license.
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// For details see: http://anxframework.codeplex.com/license
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namespace ANX.SoundSystem.OpenAL
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{
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[Developer("AstrorEnales")]
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public class OpenALSoundEffect : ISoundEffect
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{
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#region Private
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private WaveInfo waveInfo;
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private TimeSpan duration;
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internal int BufferHandle { get; private set; }
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#endregion
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#region Public
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public TimeSpan Duration
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{
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get { return duration; }
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}
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#endregion
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#region Constructor
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internal OpenALSoundEffect(Stream stream)
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{
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CreateFromStream(stream);
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}
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internal OpenALSoundEffect(byte[] buffer, int offset, int count, int sampleRate, AudioChannels channels,
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int loopStart, int loopLength)
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{
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// TODO: loopStart and loopLength
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byte[] subBuffer = new byte[count];
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Array.Copy(buffer, offset, subBuffer, 0, count);
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BufferHandle = AL.GenBuffer();
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// TODO: evaluate if 8bit or 16bit!!
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ALFormat format = channels == AudioChannels.Mono ? ALFormat.Mono8 : ALFormat.Stereo8;
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AL.BufferData(BufferHandle, format, subBuffer, count, sampleRate);
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float sizeMulBlockAlign = count / ((int)channels * 2f);
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duration = TimeSpan.FromMilliseconds(sizeMulBlockAlign * 1000f / sampleRate);
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ALError error = AL.GetError();
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if (error != ALError.NoError)
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throw new Exception("OpenAL error " + error + ": " + AL.GetErrorString(error));
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}
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#endregion
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#region CreateFromStream
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private void CreateFromStream(Stream stream)
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{
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waveInfo = WaveFile.LoadData(stream);
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if (waveInfo.WaveFormat != WaveFormat.PCM)
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{
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var converter = new WaveConverter(waveInfo);
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converter.ConvertToPcm();
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}
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duration = waveInfo.CalculateDuration();
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BufferHandle = AL.GenBuffer();
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AL.BufferData(BufferHandle, (ALFormat)waveInfo.ALFormat, waveInfo.Data, waveInfo.Data.Length, waveInfo.SampleRate);
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ALError error = AL.GetError();
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if (error != ALError.NoError)
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throw new Exception("OpenAL error " + error + ": " + AL.GetErrorString(error));
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}
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#endregion
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#region Dispose
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public void Dispose()
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{
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waveInfo = null;
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AL.DeleteBuffer(BufferHandle);
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}
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#endregion
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}
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}
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