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-rw-r--r--Alc/dsound.c294
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diff --git a/Alc/dsound.c b/Alc/dsound.c
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+/**
+ * OpenAL cross platform audio library
+ * Copyright (C) 1999-2007 by authors.
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ * Or go to http://www.gnu.org/copyleft/lgpl.html
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <memory.h>
+
+#include <windows.h>
+#include <mmsystem.h>
+#include <dsound.h>
+
+#include "alMain.h"
+#include "AL/al.h"
+#include "AL/alc.h"
+
+
+typedef struct {
+ // DirectSound Playback Device
+ LPDIRECTSOUND lpDS;
+ LPDIRECTSOUNDBUFFER DSpbuffer;
+ LPDIRECTSOUNDBUFFER DSsbuffer;
+ MMRESULT ulDSTimerID;
+} DSoundData;
+
+
+static ALCchar *DeviceList[16];
+
+static void CALLBACK DirectSoundProc(UINT uID,UINT uReserved,DWORD_PTR dwUser,DWORD_PTR dwReserved1,DWORD_PTR dwReserved2)
+{
+ static DWORD OldWriteCursor=0;
+
+ ALCdevice *pDevice = (ALCdevice *)dwUser;
+ DSoundData *pData = pDevice->ExtraData;
+ DWORD PlayCursor,WriteCursor;
+ BYTE *WritePtr1,*WritePtr2;
+ DWORD WriteCnt1,WriteCnt2;
+ WAVEFORMATEX OutputType;
+ DWORD BytesPlayed;
+ DWORD BufSize;
+ HRESULT DSRes;
+
+ (void)uID;
+ (void)uReserved;
+ (void)dwReserved1;
+ (void)dwReserved2;
+
+ BufSize = pDevice->UpdateFreq * pDevice->FrameSize;
+
+ // Get current play and write cursors
+ IDirectSoundBuffer_GetCurrentPosition(pData->DSsbuffer,&PlayCursor,&WriteCursor);
+ if (!OldWriteCursor) OldWriteCursor=WriteCursor-PlayCursor;
+
+ // Get the output format and figure the number of bytes played (block aligned)
+ IDirectSoundBuffer_GetFormat(pData->DSsbuffer,&OutputType,sizeof(WAVEFORMATEX),NULL);
+ BytesPlayed=((((WriteCursor<OldWriteCursor)?(BufSize+WriteCursor-OldWriteCursor):(WriteCursor-OldWriteCursor))/OutputType.nBlockAlign)*OutputType.nBlockAlign);
+
+ // Lock output buffer started at 40msec in front of the old write cursor (15msec in front of the actual write cursor)
+ DSRes=IDirectSoundBuffer_Lock(pData->DSsbuffer,(OldWriteCursor+(OutputType.nSamplesPerSec/25)*OutputType.nBlockAlign)%BufSize,BytesPlayed,(LPVOID*)&WritePtr1,&WriteCnt1,(LPVOID*)&WritePtr2,&WriteCnt2,0);
+
+ // If the buffer is lost, restore it, play and lock
+ if (DSRes==DSERR_BUFFERLOST)
+ {
+ IDirectSoundBuffer_Restore(pData->DSsbuffer);
+ IDirectSoundBuffer_Play(pData->DSsbuffer,0,0,DSBPLAY_LOOPING);
+ DSRes=IDirectSoundBuffer_Lock(pData->DSsbuffer,(OldWriteCursor+(OutputType.nSamplesPerSec/25)*OutputType.nBlockAlign)%BufSize,BytesPlayed,(LPVOID*)&WritePtr1,&WriteCnt1,(LPVOID*)&WritePtr2,&WriteCnt2,0);
+ }
+
+ // Successfully locked the output buffer
+ if (DSRes==DS_OK)
+ {
+ // If we have an active context, mix data directly into output buffer otherwise fill with silence
+ SuspendContext(NULL);
+ if(pDevice->Context)
+ {
+ if (WritePtr1)
+ aluMixData(pDevice->Context, WritePtr1, WriteCnt1, pDevice->Format);
+ if (WritePtr2)
+ aluMixData(pDevice->Context, WritePtr2, WriteCnt2, pDevice->Format);
+ }
+ else
+ {
+ if (WritePtr1) memset(WritePtr1, 0, WriteCnt1);
+ if (WritePtr2) memset(WritePtr2, 0, WriteCnt2);
+ }
+ ProcessContext(NULL);
+
+ // Unlock output buffer only when successfully locked
+ IDirectSoundBuffer_Unlock(pData->DSsbuffer,WritePtr1,WriteCnt1,WritePtr2,WriteCnt2);
+ }
+
+ // Update old write cursor location
+ OldWriteCursor=((OldWriteCursor+BytesPlayed)%BufSize);
+}
+
+
+static ALCboolean DSoundOpenPlayback(ALCdevice *device, const ALCchar *deviceName)
+{
+ DSBUFFERDESC DSBDescription;
+ DSoundData *pData = NULL;
+ WAVEFORMATEX OutputType;
+ HRESULT hr;
+
+ if(deviceName)
+ {
+ int i;
+ for(i = 0;DeviceList[i];i++)
+ {
+ if(strcmp(deviceName, DeviceList[i]) == 0)
+ break;
+ }
+ if(!DeviceList[i])
+ return ALC_FALSE;
+ }
+
+ //Platform specific
+ memset(&OutputType, 0, sizeof(WAVEFORMATEX));
+ OutputType.wFormatTag = WAVE_FORMAT_PCM;
+ OutputType.nChannels = device->Channels;
+ OutputType.wBitsPerSample = (((device->Format==AL_FORMAT_MONO16)||(device->Format==AL_FORMAT_STEREO16)||(device->Format==AL_FORMAT_QUAD16))?16:8);
+ OutputType.nBlockAlign = OutputType.nChannels*OutputType.wBitsPerSample/8;
+ OutputType.nSamplesPerSec = device->Frequency;
+ OutputType.nAvgBytesPerSec = OutputType.nSamplesPerSec*OutputType.nBlockAlign;
+ OutputType.cbSize = 0;
+
+ //Initialise requested device
+
+ pData = calloc(1, sizeof(DSoundData));
+ if(!pData)
+ {
+ SetALCError(ALC_OUT_OF_MEMORY);
+ return ALC_FALSE;
+ }
+
+ //Init COM
+ CoInitialize(NULL);
+
+ //DirectSound Init code
+ hr = CoCreateInstance(&CLSID_DirectSound, NULL, CLSCTX_INPROC_SERVER, &IID_IDirectSound, (LPVOID*)&pData->lpDS);
+ if(SUCCEEDED(hr))
+ hr = IDirectSound_Initialize(pData->lpDS, NULL);
+ if(SUCCEEDED(hr))
+ hr = IDirectSound_SetCooperativeLevel(pData->lpDS, GetForegroundWindow(), DSSCL_PRIORITY);
+
+ if(SUCCEEDED(hr))
+ {
+ memset(&DSBDescription,0,sizeof(DSBUFFERDESC));
+ DSBDescription.dwSize=sizeof(DSBUFFERDESC);
+ DSBDescription.dwFlags=DSBCAPS_PRIMARYBUFFER;
+ hr = IDirectSound_CreateSoundBuffer(pData->lpDS, &DSBDescription, &pData->DSpbuffer, NULL);
+ }
+ if(SUCCEEDED(hr))
+ hr = IDirectSoundBuffer_SetFormat(pData->DSpbuffer,&OutputType);
+
+ if(SUCCEEDED(hr))
+ {
+ memset(&DSBDescription,0,sizeof(DSBUFFERDESC));
+ DSBDescription.dwSize=sizeof(DSBUFFERDESC);
+ DSBDescription.dwFlags=DSBCAPS_GLOBALFOCUS|DSBCAPS_GETCURRENTPOSITION2;
+ DSBDescription.dwBufferBytes=device->UpdateFreq * device->FrameSize;
+ DSBDescription.lpwfxFormat=&OutputType;
+ hr = IDirectSound_CreateSoundBuffer(pData->lpDS, &DSBDescription, &pData->DSsbuffer, NULL);
+ }
+
+ if(SUCCEEDED(hr))
+ hr = IDirectSoundBuffer_Play(pData->DSsbuffer, 0, 0, DSBPLAY_LOOPING);
+
+ if(FAILED(hr))
+ {
+ if (pData->DSsbuffer)
+ IDirectSoundBuffer_Release(pData->DSsbuffer);
+ if (pData->DSpbuffer)
+ IDirectSoundBuffer_Release(pData->DSpbuffer);
+ if (pData->lpDS)
+ IDirectSound_Release(pData->lpDS);
+
+ free(pData);
+ return ALC_FALSE;
+ }
+
+ pData->ulDSTimerID = timeSetEvent(25, 0, (LPTIMECALLBACK)DirectSoundProc, (DWORD)device, (UINT)TIME_CALLBACK_FUNCTION|TIME_PERIODIC);
+ device->MaxNoOfSources = 256;
+
+ if(deviceName)
+ strcpy(device->szDeviceName, deviceName);
+ else
+ strcpy(device->szDeviceName, DeviceList[0]);
+
+ device->ExtraData = pData;
+ return ALC_TRUE;
+}
+
+static void DSoundClosePlayback(ALCdevice *device)
+{
+ DSoundData *pData = device->ExtraData;
+
+ // Stop and release the DS timer
+ if (pData->ulDSTimerID)
+ timeKillEvent(pData->ulDSTimerID);
+
+ // Wait ... just in case any timer events happen
+ Sleep(100);
+
+ SuspendContext(NULL);
+
+ if (pData->DSsbuffer)
+ IDirectSoundBuffer_Release(pData->DSsbuffer);
+ if (pData->DSpbuffer)
+ IDirectSoundBuffer_Release(pData->DSpbuffer);
+ IDirectSound_Release(pData->lpDS);
+
+ //Deinit COM
+ CoUninitialize();
+
+ ProcessContext(NULL);
+
+ free(pData);
+ device->ExtraData = NULL;
+}
+
+
+static ALCboolean DSoundOpenCapture(ALCdevice *pDevice, const ALCchar *deviceName, ALCuint frequency, ALCenum format, ALCsizei SampleSize)
+{
+ (void)pDevice;
+ (void)deviceName;
+ (void)frequency;
+ (void)format;
+ (void)SampleSize;
+ return ALC_FALSE;
+}
+
+static void DSoundCloseCapture(ALCdevice *pDevice)
+{
+ (void)pDevice;
+}
+
+static void DSoundStartCapture(ALCdevice *pDevice)
+{
+ (void)pDevice;
+}
+
+static void DSoundStopCapture(ALCdevice *pDevice)
+{
+ (void)pDevice;
+}
+
+static void DSoundCaptureSamples(ALCdevice *pDevice, ALCvoid *pBuffer, ALCuint lSamples)
+{
+ (void)pDevice;
+ (void)pBuffer;
+ (void)lSamples;
+}
+
+static ALCuint DSoundAvailableSamples(ALCdevice *pDevice)
+{
+ (void)pDevice;
+ return 0;
+}
+
+
+BackendFuncs DSoundFuncs = {
+ DSoundOpenPlayback,
+ DSoundClosePlayback,
+ DSoundOpenCapture,
+ DSoundCloseCapture,
+ DSoundStartCapture,
+ DSoundStopCapture,
+ DSoundCaptureSamples,
+ DSoundAvailableSamples
+};
+
+void alcDSoundInit(BackendFuncs *FuncList)
+{
+ *FuncList = DSoundFuncs;
+
+ DeviceList[0] = AppendDeviceList("DirectSound Software");
+ AppendAllDeviceList(DeviceList[0]);
+}
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