dolphin/Source/Plugins/Plugin_DSP_HLE/Src/PCHW/DSoundStream.cpp

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// Copyright (C) 2003-2008 Dolphin Project.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License 2.0 for more details.
// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/
// Official SVN repository and contact information can be found at
// http://code.google.com/p/dolphin-emu/
#include "stdafx.h"
#include <mmsystem.h>
#include <dsound.h>
#include "DSoundStream.h"
namespace DSound
{
#define BUFSIZE 32768
#define MAXWAIT 70 //ms
CRITICAL_SECTION soundCriticalSection;
HANDLE soundSyncEvent;
HANDLE hThread;
StreamCallback callback;
IDirectSound8* ds;
IDirectSoundBuffer* dsBuffer;
int bufferSize; //i bytes
int totalRenderedBytes;
int sampleRate;
// playback position
int currentPos;
int lastPos;
short realtimeBuffer[1024 * 1024];
// We set this to shut down the sound thread.
// 0=keep playing, 1=stop playing NOW.
volatile int threadData;
inline int FIX128(int x)
{
return(x & (~127));
}
int DSound_GetSampleRate()
{
return(sampleRate);
}
bool CreateBuffer()
{
PCMWAVEFORMAT pcmwf;
DSBUFFERDESC dsbdesc;
memset(&pcmwf, 0, sizeof(PCMWAVEFORMAT));
memset(&dsbdesc, 0, sizeof(DSBUFFERDESC));
pcmwf.wf.wFormatTag = WAVE_FORMAT_PCM;
pcmwf.wf.nChannels = 2;
pcmwf.wf.nSamplesPerSec = sampleRate;
pcmwf.wf.nBlockAlign = 4;
pcmwf.wf.nAvgBytesPerSec = pcmwf.wf.nSamplesPerSec * pcmwf.wf.nBlockAlign;
pcmwf.wBitsPerSample = 16;
//buffer description
dsbdesc.dwSize = sizeof(DSBUFFERDESC);
dsbdesc.dwFlags = DSBCAPS_GETCURRENTPOSITION2 | DSBCAPS_STICKYFOCUS; //VIKTIGT //DSBCAPS_CTRLPAN | DSBCAPS_CTRLVOLUME | DSBCAPS_CTRLFREQUENCY;
dsbdesc.dwBufferBytes = bufferSize = BUFSIZE;
dsbdesc.lpwfxFormat = (WAVEFORMATEX*)&pcmwf;
if (SUCCEEDED(ds->CreateSoundBuffer(&dsbdesc, &dsBuffer, NULL)))
{
dsBuffer->SetCurrentPosition(0);
return(true);
}
else
{
// Failed.
dsBuffer = NULL;
return(false);
}
}
bool WriteDataToBuffer(DWORD dwOffset, // Our own write cursor.
char* soundData, // Start of our data.
DWORD dwSoundBytes) // Size of block to copy.
{
void* ptr1, * ptr2;
DWORD numBytes1, numBytes2;
// Obtain memory address of write block. This will be in two parts if the block wraps around.
HRESULT hr = dsBuffer->Lock(dwOffset, dwSoundBytes, &ptr1, &numBytes1, &ptr2, &numBytes2, 0);
// If the buffer was lost, restore and retry lock.
if (DSERR_BUFFERLOST == hr)
{
dsBuffer->Restore();
hr = dsBuffer->Lock(dwOffset, dwSoundBytes, &ptr1, &numBytes1, &ptr2, &numBytes2, 0);
}
if (SUCCEEDED(hr))
{
memcpy(ptr1, soundData, numBytes1);
if (ptr2 != 0)
{
memcpy(ptr2, soundData + numBytes1, numBytes2);
}
// Release the data back to DirectSound.
dsBuffer->Unlock(ptr1, numBytes1, ptr2, numBytes2);
return(true);
}
return(false);
}
inline int ModBufferSize(int x)
{
return((x + bufferSize) % bufferSize);
}
// The audio thread.
DWORD WINAPI soundThread(void*)
{
currentPos = 0;
lastPos = 0;
// Prefill buffer?
//writeDataToBuffer(0,realtimeBuffer,bufferSize);
// dsBuffer->Lock(0, bufferSize, (void **)&p1, &num1, (void **)&p2, &num2, 0);
dsBuffer->Play(0, 0, DSBPLAY_LOOPING);
while (!threadData)
{
// No blocking inside the csection
EnterCriticalSection(&soundCriticalSection);
dsBuffer->GetCurrentPosition((DWORD*)&currentPos, 0);
int numBytesToRender = FIX128(ModBufferSize(currentPos - lastPos));
if (numBytesToRender >= 256)
{
if (numBytesToRender > sizeof(realtimeBuffer))
MessageBox(0,"soundThread: too big render call",0,0);
(*callback)(realtimeBuffer, numBytesToRender >> 2, 16, sampleRate, 2);
WriteDataToBuffer(lastPos, (char*)realtimeBuffer, numBytesToRender);
currentPos = ModBufferSize(lastPos + numBytesToRender);
totalRenderedBytes += numBytesToRender;
lastPos = currentPos;
}
LeaveCriticalSection(&soundCriticalSection);
WaitForSingleObject(soundSyncEvent, MAXWAIT);
}
dsBuffer->Stop();
return(0); //hurra!
}
bool DSound_StartSound(HWND window, int _sampleRate, StreamCallback _callback)
{
callback = _callback;
threadData = 0;
sampleRate = _sampleRate;
//no security attributes, automatic resetting, init state nonset, untitled
soundSyncEvent = CreateEvent(0, false, false, 0);
//vi initierar den...........
InitializeCriticalSection(&soundCriticalSection);
//vi vill ha access till DSOUND s<>...
if (FAILED(DirectSoundCreate8(0, &ds, 0)))
return false;
ds->SetCooperativeLevel(window, DSSCL_NORMAL);
if (!CreateBuffer())
{
return false;
}
DWORD num1;
short* p1;
dsBuffer->Lock(0, bufferSize, (void* *)&p1, &num1, 0, 0, 0);
memset(p1, 0, num1);
dsBuffer->Unlock(p1, num1, 0, 0);
totalRenderedBytes = -bufferSize;
DWORD h;
hThread = CreateThread(0, 0, soundThread, 0, 0, &h);
SetThreadPriority(hThread, THREAD_PRIORITY_ABOVE_NORMAL);
return true;
}
void DSound_UpdateSound()
{
SetEvent(soundSyncEvent);
}
void DSound_StopSound()
{
EnterCriticalSection(&soundCriticalSection);
threadData = 1;
// kick the thread if it's waiting
SetEvent(soundSyncEvent);
LeaveCriticalSection(&soundCriticalSection);
WaitForSingleObject(hThread, INFINITE);
CloseHandle(hThread);
dsBuffer->Release();
ds->Release();
CloseHandle(soundSyncEvent);
soundSyncEvent = INVALID_HANDLE_VALUE;
hThread = INVALID_HANDLE_VALUE;
}
int DSound_GetCurSample()
{
EnterCriticalSection(&soundCriticalSection);
int playCursor;
dsBuffer->GetCurrentPosition((DWORD*)&playCursor, 0);
playCursor = ModBufferSize(playCursor - lastPos) + totalRenderedBytes;
LeaveCriticalSection(&soundCriticalSection);
return(playCursor);
}
float DSound_GetTimer()
{
return((float)DSound_GetCurSample() * (1.0f / (4.0f * sampleRate)));
}
} // namespace