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https://github.com/dolphin-emu/dolphin.git
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4990b8910b
Pretty straightforward; IDirectSoundNotify lets you register for notifications after a certain amount of sound has played, so use that instead of depending on Update() notifications from the CPU thread. Also, while I'm here, reduce the buffer size by a factor of 4; this seems to reduce the latency, although the difference is sort of subtle.
76 lines
1.3 KiB
C++
76 lines
1.3 KiB
C++
// Copyright 2013 Dolphin Emulator Project
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// Licensed under GPLv2
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// Refer to the license.txt file included.
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#pragma once
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#include "AudioCommon/SoundStream.h"
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#include "Common/Thread.h"
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#ifdef _WIN32
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#include <Windows.h>
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#include <mmsystem.h>
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#include <dsound.h>
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#define BUFSIZE (256 * 8 * 4)
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#endif
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class DSound final : public SoundStream
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{
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#ifdef _WIN32
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std::thread thread;
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HANDLE soundSyncEvent;
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void *hWnd;
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IDirectSound8* ds;
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IDirectSoundBuffer* dsBuffer;
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int bufferSize; //i bytes
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int m_volume;
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// playback position
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int currentPos;
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int lastPos;
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short realtimeBuffer[BUFSIZE / sizeof(short)];
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inline int FIX128(int x)
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{
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return x & (~127);
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}
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inline int ModBufferSize(int x)
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{
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return (x + bufferSize) % bufferSize;
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}
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bool CreateBuffer();
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bool WriteDataToBuffer(DWORD dwOffset, char* soundData, DWORD dwSoundBytes);
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public:
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DSound(CMixer *mixer, void *_hWnd)
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: SoundStream(mixer)
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, bufferSize(0)
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, currentPos(0)
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, lastPos(0)
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, dsBuffer(0)
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, ds(0)
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, hWnd(_hWnd)
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{}
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virtual ~DSound() {}
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virtual bool Start();
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virtual void SoundLoop();
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virtual void SetVolume(int volume);
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virtual void Stop();
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virtual void Clear(bool mute);
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static bool isValid() { return true; }
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#else
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public:
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DSound(CMixer *mixer, void *_hWnd)
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: SoundStream(mixer)
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{}
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#endif
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};
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