58 lines
1.7 KiB
C#
58 lines
1.7 KiB
C#
using UnityEngine;
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using VirtualNes.Core;
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namespace AxibugEmuOnline.Client
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{
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public class AudioProvider : MonoBehaviour
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{
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public NesEmulator NesEmu { get; set; }
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[SerializeField]
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private AudioSource m_as;
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private SoundBuffer _buffer = new SoundBuffer(4096);
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public void Start()
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{
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//TODO 采样率需要更准确，而且和clip并没有关系
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var dummy = AudioClip.Create("dummy", 1, 1, AudioSettings.outputSampleRate, false);
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dummy.SetData(new float[] { 1 }, 0);
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m_as.clip = dummy; //just to let unity play the audiosource
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m_as.loop = true;
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m_as.spatialBlend = 1;
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m_as.Play();
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}
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public void GetAudioParams(out int frequency, out int channels)
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{
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frequency = m_as.clip.samples;
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channels = m_as.clip.channels;
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}
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void OnAudioFilterRead(float[] data, int channels)
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{
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int step = channels;
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if (NesEmu == null || NesEmu.NesCore == null) return;
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if (NesEmu.IsPause) return;
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ProcessSound(NesEmu.NesCore, (uint)(data.Length / channels));
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for (int i = 0; i < data.Length; i += step)
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{
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float rawFloat = 0;
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byte rawData;
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if (_buffer.TryRead(out rawData))
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rawFloat = rawData / 255f;
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data[i] = rawFloat;
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for (int fill = 1; fill < step; fill++)
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data[i + fill] = rawFloat;
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}
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}
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void ProcessSound(NES nes, uint feedCount)
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{
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nes.apu.Process(_buffer, feedCount);
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}
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}
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} |