90 lines
2.1 KiB
C#
90 lines
2.1 KiB
C#
using System;
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using BizHawk.Emulation.Common;
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using BizHawk.Emulation.Cores.Nintendo.N64.NativeApi;
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namespace BizHawk.Emulation.Cores.Nintendo.N64
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{
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class N64Audio : IDisposable
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{
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/// <summary>
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/// mupen64 DLL Api
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/// </summary>
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private mupen64plusAudioApi api;
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private mupen64plusApi coreAPI;
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/// <summary>
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/// Buffer for audio data
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/// </summary>
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private short[] audioBuffer = new short[0];
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private uint _samplingRate = 0;
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/// <summary>
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/// Currently active sampling rate
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/// </summary>
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public uint SamplingRate
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{
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get
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{
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return _samplingRate;
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}
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private set
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{
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_samplingRate = value;
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Resampler.ChangeRate(_samplingRate, 44100, _samplingRate, 44100);
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}
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}
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/// <summary>
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/// Resampler for audio output
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/// </summary>
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public SpeexResampler Resampler { get; private set; }
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public bool RenderSound { get; set; }
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/// <summary>
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/// Creates a N64 Audio subsystem
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/// </summary>
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/// <param name="api">Mupen64 api which is used for fetching sound</param>
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public N64Audio(mupen64plusApi core)
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{
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this.api = new mupen64plusAudioApi(core);
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_samplingRate = api.GetSamplingRate();
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Resampler = new SpeexResampler(6, SamplingRate, 44100,
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SamplingRate, 44100);
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coreAPI = core;
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coreAPI.VInterrupt += DoAudioFrame;
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}
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/// <summary>
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/// Fetches the audio buffer from mupen64plus and pushes it into the
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/// Resampler for audio output
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/// </summary>
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public void DoAudioFrame()
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{
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uint m64pSamplingRate = api.GetSamplingRate();
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if (m64pSamplingRate != SamplingRate)
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SamplingRate = m64pSamplingRate;
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int audioBufferSize = api.GetAudioBufferSize();
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if (audioBuffer.Length < audioBufferSize)
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audioBuffer = new short[audioBufferSize];
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if (audioBufferSize > 0)
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{
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api.GetAudioBuffer(audioBuffer);
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if (RenderSound)
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Resampler.EnqueueSamples(audioBuffer, audioBufferSize / 2);
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}
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}
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public void Dispose()
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{
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coreAPI.VInterrupt -= DoAudioFrame;
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if(Resampler != null)
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Resampler.Dispose();
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Resampler = null;
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api = null;
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}
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}
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}
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