mirror of
https://github.com/libretro/snes9x.git
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348 lines
9.1 KiB
C++
348 lines
9.1 KiB
C++
/*****************************************************************************\
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Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
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This file is licensed under the Snes9x License.
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For further information, consult the LICENSE file in the root directory.
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\*****************************************************************************/
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// CDirectSound.cpp: implementation of the CDirectSound class.
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//
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//////////////////////////////////////////////////////////////////////
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#include "wsnes9x.h"
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#include "../snes9x.h"
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#include "../apu/apu.h"
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#include "CDirectSound.h"
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#include <process.h>
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//////////////////////////////////////////////////////////////////////
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// Construction/Destruction
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//////////////////////////////////////////////////////////////////////
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CDirectSound::CDirectSound()
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{
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lpDS = NULL;
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lpDSB = NULL;
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lpDSBPrimary = NULL;
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initDone = NULL;
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blockCount = 0;
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blockSize = 0;
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bufferSize = 0;
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blockSamples = 0;
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hTimer = NULL;
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}
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CDirectSound::~CDirectSound()
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{
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DeInitDirectSound();
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}
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/* CDirectSound::InitDirectSound
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initializes the DirectSound object, the timer queue for the mixing timer, and sets the cooperation level
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-----
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returns true if successful, false otherwise
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*/
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bool CDirectSound::InitDirectSound ()
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{
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HRESULT dErr;
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if(initDone)
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return true;
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if (!lpDS)
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{
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dErr = DirectSoundCreate (NULL, &lpDS, NULL);
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if (dErr != DS_OK)
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{
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MessageBox (GUI.hWnd, TEXT("\
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Unable to initialise DirectSound. You will not be able to hear any\n\
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sound effects or music while playing.\n\n\
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It is usually caused by not having DirectX installed, another\n\
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application that has already opened DirectSound in exclusive\n\
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mode or the Windows WAVE device has been opened."),
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TEXT("Snes9X - Unable to Open DirectSound"),
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MB_OK | MB_ICONWARNING);
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return (false);
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}
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}
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initDone = true;
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dErr = lpDS->SetCooperativeLevel (GUI.hWnd, DSSCL_PRIORITY | DSSCL_EXCLUSIVE);
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if (!SUCCEEDED(dErr))
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{
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dErr = lpDS->SetCooperativeLevel (GUI.hWnd, DSSCL_PRIORITY);
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if (!SUCCEEDED(dErr))
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{
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if (!SUCCEEDED(lpDS -> SetCooperativeLevel (GUI.hWnd, DSSCL_NORMAL)))
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{
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DeInitDirectSound();
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initDone = false;
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}
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if (initDone)
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MessageBox (GUI.hWnd, TEXT("\
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Unable to set DirectSound's priority cooperative level.\n\
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Another application is dicating the sound playback rate,\n\
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sample size and mono/stereo setting."),
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TEXT("Snes9X - Unable to Set DirectSound priority"),
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MB_OK | MB_ICONWARNING);
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else
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MessageBox (GUI.hWnd, TEXT("\
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Unable to set any DirectSound cooperative level. You will\n\
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not be able to hear any sound effects or music while playing.\n\n\
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It is usually caused by another application that has already\n\
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opened DirectSound in exclusive mode."),
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TEXT("Snes9X - Unable to DirectSound"),
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MB_OK | MB_ICONWARNING);
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}
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}
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return (initDone);
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}
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/* CDirectSound::DeInitDirectSound
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releases all DirectSound objects and buffers
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*/
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void CDirectSound::DeInitDirectSound()
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{
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initDone = false;
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DeInitSoundBuffer();
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if( lpDS != NULL)
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{
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lpDS->SetCooperativeLevel (GUI.hWnd, DSSCL_NORMAL);
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lpDS->Release ();
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lpDS = NULL;
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}
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}
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/* CDirectSound::InitSoundBuffer
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creates the DirectSound buffers and allocates the temp buffer for SoundSync
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-----
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returns true if successful, false otherwise
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*/
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bool CDirectSound::InitSoundBuffer()
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{
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DSBUFFERDESC dsbd;
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WAVEFORMATEX wfx,wfx_actual;
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HRESULT dErr;
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blockCount = 4;
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blockTime = GUI.SoundBufferSize / blockCount;
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blockSamples = (Settings.SoundPlaybackRate * blockTime) / 1000;
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blockSamples *= (Settings.Stereo ? 2 : 1);
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blockSize = blockSamples * (Settings.SixteenBitSound ? 2 : 1);
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bufferSize = blockSize * blockCount;
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wfx.wFormatTag = WAVE_FORMAT_PCM;
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wfx.nChannels = Settings.Stereo ? 2 : 1;
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wfx.nSamplesPerSec = Settings.SoundPlaybackRate;
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wfx.nBlockAlign = (Settings.SixteenBitSound ? 2 : 1) * (Settings.Stereo ? 2 : 1);
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wfx.wBitsPerSample = Settings.SixteenBitSound ? 16 : 8;
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wfx.nAvgBytesPerSec = wfx.nSamplesPerSec * wfx.nBlockAlign;
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wfx.cbSize = 0;
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ZeroMemory (&dsbd, sizeof(DSBUFFERDESC) );
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dsbd.dwSize = sizeof(dsbd);
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dsbd.dwFlags = DSBCAPS_PRIMARYBUFFER | DSBCAPS_STICKYFOCUS;
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dErr = lpDS->CreateSoundBuffer (&dsbd, &lpDSBPrimary, NULL);
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if (dErr != DS_OK)
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{
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lpDSB = NULL;
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return (false);
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}
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lpDSBPrimary->SetFormat (&wfx);
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if (lpDSBPrimary->GetFormat (&wfx_actual, sizeof (wfx_actual), NULL) == DS_OK)
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{
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if(wfx.nSamplesPerSec!=wfx_actual.nSamplesPerSec ||
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wfx_actual.nChannels != wfx.nChannels || wfx.wBitsPerSample != wfx_actual.wBitsPerSample) {
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return false;
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}
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}
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lpDSBPrimary->Play (0, 0, DSBPLAY_LOOPING);
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ZeroMemory (&dsbd, sizeof (dsbd));
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dsbd.dwSize = sizeof( dsbd);
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dsbd.dwFlags = DSBCAPS_CTRLFREQUENCY | DSBCAPS_CTRLVOLUME |
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DSBCAPS_GETCURRENTPOSITION2 | DSBCAPS_STICKYFOCUS | DSBCAPS_CTRLPOSITIONNOTIFY;
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dsbd.dwBufferBytes = bufferSize;
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dsbd.lpwfxFormat = &wfx;
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if (lpDS->CreateSoundBuffer (&dsbd, &lpDSB, NULL) != DS_OK)
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{
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lpDSBPrimary->Release ();
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lpDSBPrimary = NULL;
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lpDSB->Release();
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lpDSB = NULL;
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return (false);
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}
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return true;
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}
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/* CDirectSound::DeInitSoundBuffer
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deinitializes the DirectSound/temp buffers and stops the mixing timer
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*/
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void CDirectSound::DeInitSoundBuffer()
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{
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if(hTimer) {
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timeKillEvent(hTimer);
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hTimer = NULL;
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}
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if( lpDSB != NULL)
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{
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lpDSB->Stop ();
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lpDSB->Release();
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lpDSB = NULL;
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}
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if( lpDSBPrimary != NULL)
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{
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lpDSBPrimary->Stop ();
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lpDSBPrimary->Release();
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lpDSBPrimary = NULL;
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}
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}
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/* CDirectSound::SetupSound
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applies sound setting changes by recreating the buffers and starting a new mixing timer
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it fills the buffer before starting playback
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-----
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returns true if successful, false otherwise
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*/
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bool CDirectSound::SetupSound()
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{
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HRESULT hResult;
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if(!initDone)
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return false;
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DeInitSoundBuffer();
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InitSoundBuffer();
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BYTE *B1;
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DWORD S1;
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hResult = lpDSB->Lock (0, 0, (void **)&B1,
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&S1, NULL, NULL, DSBLOCK_ENTIREBUFFER);
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if (hResult == DSERR_BUFFERLOST)
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{
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lpDSB->Restore ();
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hResult = lpDSB->Lock (0, 0, (void **)&B1,
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&S1, NULL, NULL, DSBLOCK_ENTIREBUFFER);
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}
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if (!SUCCEEDED(hResult))
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{
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hResult = lpDSB -> Unlock (B1, S1, NULL, NULL);
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return true;
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}
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S9xMixSamples(B1,blockSamples * blockCount);
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lpDSB->Unlock(B1,S1,NULL,NULL);
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lpDSB->Play (0, 0, DSBPLAY_LOOPING);
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last_block = blockCount - 1;
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hTimer = timeSetEvent (blockTime/2, blockTime/2, SoundTimerCallback, (DWORD_PTR)this, TIME_PERIODIC);
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if(!hTimer) {
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DeInitSoundBuffer();
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return false;
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}
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return (true);
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}
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void CDirectSound::SetVolume(double volume)
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{
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if (!initDone)
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return;
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// convert percentage to hundredths of dB
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LONG dbVolume = (LONG)(10 * log10(volume) * 2 * 100);
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lpDSB->SetVolume(dbVolume);
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}
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/* CDirectSound::ProcessSound
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Finishes core sample creation, syncronizes the buffer access.
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*/
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void CDirectSound::ProcessSound()
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{
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EnterCriticalSection(&GUI.SoundCritSect);
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S9xFinalizeSamples();
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LeaveCriticalSection(&GUI.SoundCritSect);
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}
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/* CDirectSound::MixSound
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the mixing function called by the mix timer
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uses the current play position to decide if a new block can be filled with audio data
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synchronizes the core buffer access with a critical section
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*/
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void CDirectSound::MixSound()
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{
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DWORD play_pos = 0, write_pos = 0;
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HRESULT hResult;
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DWORD curr_block;
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if(!initDone)
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return;
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lpDSB->GetCurrentPosition (&play_pos, NULL);
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curr_block = ((play_pos / blockSize) + blockCount) % blockCount;
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if (curr_block != last_block)
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{
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BYTE *B1, *B2;
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DWORD S1, S2;
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write_pos = curr_block * blockSize;
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last_block = curr_block;
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hResult = lpDSB->Lock (write_pos, blockSize, (void **)&B1,
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&S1, (void **)&B2, &S2, 0);
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if (hResult == DSERR_BUFFERLOST)
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{
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lpDSB->Restore ();
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hResult = lpDSB->Lock (write_pos, blockSize,
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(void **)&B1, &S1, (void **)&B2,
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&S2, 0);
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}
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if (!SUCCEEDED(hResult))
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{
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hResult = lpDSB -> Unlock (B1, S1, B2, S2);
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return;
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}
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EnterCriticalSection(&GUI.SoundCritSect);
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if (B1)
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{
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S9xMixSamples(B1,(Settings.SixteenBitSound?S1>>1:S1));
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}
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if (B2)
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{
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S9xMixSamples(B2,(Settings.SixteenBitSound?S2>>1:S2));
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}
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LeaveCriticalSection(&GUI.SoundCritSect);
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SetEvent(GUI.SoundSyncEvent);
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hResult = lpDSB -> Unlock (B1, S1, B2, S2);
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if (!SUCCEEDED(hResult))
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return;
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}
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}
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/* CDirectSound::SoundTimerCallback
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Timer callback that tries to mix a new block. Called twice each block.
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*/
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VOID CALLBACK CDirectSound::SoundTimerCallback(UINT uTimerID, UINT uMsg, DWORD_PTR dwUser, DWORD_PTR dw1, DWORD_PTR dw2) {
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CDirectSound *S9xDirectSound = (CDirectSound *)dwUser;
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S9xDirectSound->MixSound();
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}
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