Alc/dsound.c

   1 /**
   2  * OpenAL cross platform audio library
   3  * Copyright (C) 1999-2007 by authors.
   4  * This library is free software; you can redistribute it and/or
   5  *  modify it under the terms of the GNU Library General Public
   6  *  License as published by the Free Software Foundation; either
   7  *  version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  *  Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  *  License along with this library; if not, write to the
  16  *  Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  *  Boston, MA  02111-1307, USA.
  18  * Or go to http://www.gnu.org/copyleft/lgpl.html
  19  */
  20
  21 #include "config.h"
  22
  23 #include <stdlib.h>
  24 #include <stdio.h>
  25 #include <memory.h>
  26
  27 #include <windows.h>
  28 #include <mmsystem.h>
  29 #include <dsound.h>
  30
  31 #include "alMain.h"
  32 #include "AL/al.h"
  33 #include "AL/alc.h"
  34
  35 #ifndef DSSPEAKER_7POINT1
  36 #define DSSPEAKER_7POINT1       7
  37 #endif
  38
  39 typedef struct {
  40     // DirectSound Playback Device
  41     LPDIRECTSOUND          lpDS;
  42     LPDIRECTSOUNDBUFFER    DSpbuffer;
  43     LPDIRECTSOUNDBUFFER    DSsbuffer;
  44
  45     int killNow;
  46     ALvoid *thread;
  47 } DSoundData;
  48
  49
  50 static ALCchar *DeviceList[16];
  51
  52
  53 static ALuint DSoundProc(ALvoid *ptr)
  54 {
  55     ALCdevice *pDevice = (ALCdevice*)ptr;
  56     DSoundData *pData = (DSoundData*)pDevice->ExtraData;
  57     DWORD LastCursor = 0;
  58     DWORD PlayCursor;
  59     VOID *WritePtr1, *WritePtr2;
  60     DWORD WriteCnt1,  WriteCnt2;
  61     DWORD avail;
  62     HRESULT err;
  63
  64     while(!pData->killNow)
  65     {
  66         // Get current play and write cursors
  67         IDirectSoundBuffer_GetCurrentPosition(pData->DSsbuffer, &PlayCursor, NULL);
  68         avail = (PlayCursor-LastCursor) % (pDevice->UpdateFreq*pDevice->FrameSize);
  69
  70         if(avail == 0)
  71         {
  72             Sleep(1);
  73             continue;
  74         }
  75
  76         // Lock output buffer
  77         WriteCnt1 = 0;
  78         WriteCnt2 = 0;
  79         err = IDirectSoundBuffer_Lock(pData->DSsbuffer, LastCursor, avail, &WritePtr1, &WriteCnt1, &WritePtr2, &WriteCnt2, 0);
  80
  81         // If the buffer is lost, restore it, play and lock
  82         if(err == DSERR_BUFFERLOST)
  83         {
  84             err = IDirectSoundBuffer_Restore(pData->DSsbuffer);
  85             if(SUCCEEDED(err))
  86                 err = IDirectSoundBuffer_Play(pData->DSsbuffer, 0, 0, DSBPLAY_LOOPING);
  87             if(SUCCEEDED(err))
  88                 err = IDirectSoundBuffer_Lock(pData->DSsbuffer, LastCursor, avail, &WritePtr1, &WriteCnt1, &WritePtr2, &WriteCnt2, 0);
  89         }
  90
  91         // Successfully locked the output buffer
  92         if(SUCCEEDED(err))
  93         {
  94             // If we have an active context, mix data directly into output buffer otherwise fill with silence
  95             SuspendContext(NULL);
  96             aluMixData(pDevice->Context, WritePtr1, WriteCnt1, pDevice->Format);
  97             aluMixData(pDevice->Context, WritePtr2, WriteCnt2, pDevice->Format);
  98             ProcessContext(NULL);
  99
 100             // Unlock output buffer only when successfully locked
 101             IDirectSoundBuffer_Unlock(pData->DSsbuffer, WritePtr1, WriteCnt1, WritePtr2, WriteCnt2);
 102         }
 103         else
 104             AL_PRINT("Buffer lock error: %#lx\n", err);
 105
 106         // Update old write cursor location
 107         LastCursor += WriteCnt1+WriteCnt2;
 108         LastCursor %= pDevice->UpdateFreq*pDevice->FrameSize;
 109     }
 110
 111     return 0;
 112 }
 113
 114 static ALCboolean DSoundOpenPlayback(ALCdevice *device, const ALCchar *deviceName)
 115 {
 116     DSBUFFERDESC DSBDescription;
 117     DSoundData *pData = NULL;
 118     WAVEFORMATEX OutputType;
 119     DWORD speakers;
 120     HRESULT hr;
 121
 122     if(deviceName)
 123     {
 124         int i;
 125         for(i = 0;DeviceList[i];i++)
 126         {
 127             if(strcmp(deviceName, DeviceList[i]) == 0)
 128             {
 129                 device->szDeviceName = DeviceList[i];
 130                 break;
 131             }
 132         }
 133         if(!DeviceList[i])
 134             return ALC_FALSE;
 135     }
 136     else
 137         device->szDeviceName = DeviceList[0];
 138
 139     memset(&OutputType, 0, sizeof(WAVEFORMATEX));
 140
 141     //Initialise requested device
 142
 143     pData = calloc(1, sizeof(DSoundData));
 144     if(!pData)
 145     {
 146         SetALCError(ALC_OUT_OF_MEMORY);
 147         return ALC_FALSE;
 148     }
 149
 150     //Init COM
 151     CoInitialize(NULL);
 152
 153     //DirectSound Init code
 154     hr = CoCreateInstance(&CLSID_DirectSound, NULL, CLSCTX_INPROC_SERVER, &IID_IDirectSound, (LPVOID*)&pData->lpDS);
 155     if(SUCCEEDED(hr))
 156         hr = IDirectSound_Initialize(pData->lpDS, NULL);
 157     if(SUCCEEDED(hr))
 158         hr = IDirectSound_SetCooperativeLevel(pData->lpDS, GetForegroundWindow(), DSSCL_PRIORITY);
 159
 160     if(SUCCEEDED(hr))
 161         hr = IDirectSound_GetSpeakerConfig(pData->lpDS, &speakers);
 162     if(SUCCEEDED(hr))
 163     {
 164         speakers = DSSPEAKER_CONFIG(speakers);
 165         if(speakers == DSSPEAKER_MONO)
 166         {
 167             if(aluBytesFromFormat(device->Format) == 8)
 168                 device->Format = AL_FORMAT_MONO8;
 169             else
 170                 device->Format = AL_FORMAT_MONO16;
 171         }
 172         else if(speakers == DSSPEAKER_STEREO)
 173         {
 174             if(aluBytesFromFormat(device->Format) == 8)
 175                 device->Format = AL_FORMAT_STEREO8;
 176             else
 177                 device->Format = AL_FORMAT_STEREO16;
 178         }
 179         else if(speakers == DSSPEAKER_QUAD)
 180         {
 181             if(aluBytesFromFormat(device->Format) == 8)
 182                 device->Format = AL_FORMAT_QUAD8;
 183             else
 184                 device->Format = AL_FORMAT_QUAD16;
 185         }
 186         else if(speakers == DSSPEAKER_5POINT1)
 187         {
 188             if(aluBytesFromFormat(device->Format) == 8)
 189                 device->Format = AL_FORMAT_51CHN8;
 190             else
 191                 device->Format = AL_FORMAT_51CHN16;
 192         }
 193         else if(speakers == DSSPEAKER_7POINT1)
 194         {
 195             if(aluBytesFromFormat(device->Format) == 8)
 196                 device->Format = AL_FORMAT_71CHN8;
 197             else
 198                 device->Format = AL_FORMAT_71CHN16;
 199         }
 200
 201         OutputType.wFormatTag = WAVE_FORMAT_PCM;
 202         OutputType.nChannels = aluChannelsFromFormat(device->Format);
 203         OutputType.wBitsPerSample = aluBytesFromFormat(device->Format) * 8;
 204         OutputType.nBlockAlign = OutputType.nChannels*OutputType.wBitsPerSample/8;
 205         OutputType.nSamplesPerSec = device->Frequency;
 206         OutputType.nAvgBytesPerSec = OutputType.nSamplesPerSec*OutputType.nBlockAlign;
 207         OutputType.cbSize = 0;
 208     }
 209
 210     if(SUCCEEDED(hr))
 211     {
 212         memset(&DSBDescription,0,sizeof(DSBUFFERDESC));
 213         DSBDescription.dwSize=sizeof(DSBUFFERDESC);
 214         DSBDescription.dwFlags=DSBCAPS_PRIMARYBUFFER;
 215         hr = IDirectSound_CreateSoundBuffer(pData->lpDS, &DSBDescription, &pData->DSpbuffer, NULL);
 216     }
 217     if(SUCCEEDED(hr))
 218         hr = IDirectSoundBuffer_SetFormat(pData->DSpbuffer,&OutputType);
 219
 220     if(SUCCEEDED(hr))
 221     {
 222         memset(&DSBDescription,0,sizeof(DSBUFFERDESC));
 223         DSBDescription.dwSize=sizeof(DSBUFFERDESC);
 224         DSBDescription.dwFlags=DSBCAPS_GLOBALFOCUS|DSBCAPS_GETCURRENTPOSITION2;
 225         DSBDescription.dwBufferBytes=device->UpdateFreq * device->FrameSize;
 226         DSBDescription.lpwfxFormat=&OutputType;
 227         hr = IDirectSound_CreateSoundBuffer(pData->lpDS, &DSBDescription, &pData->DSsbuffer, NULL);
 228     }
 229
 230     if(SUCCEEDED(hr))
 231         hr = IDirectSoundBuffer_Play(pData->DSsbuffer, 0, 0, DSBPLAY_LOOPING);
 232
 233     device->ExtraData = pData;
 234     pData->thread = StartThread(DSoundProc, device);
 235     if(!pData->thread)
 236         hr = E_FAIL;
 237
 238     if(FAILED(hr))
 239     {
 240         if (pData->DSsbuffer)
 241             IDirectSoundBuffer_Release(pData->DSsbuffer);
 242         if (pData->DSpbuffer)
 243             IDirectSoundBuffer_Release(pData->DSpbuffer);
 244         if (pData->lpDS)
 245             IDirectSound_Release(pData->lpDS);
 246
 247         free(pData);
 248         return ALC_FALSE;
 249     }
 250
 251     return ALC_TRUE;
 252 }
 253
 254 static void DSoundClosePlayback(ALCdevice *device)
 255 {
 256     DSoundData *pData = device->ExtraData;
 257
 258     pData->killNow = 1;
 259     StopThread(pData->thread);
 260
 261     IDirectSoundBuffer_Release(pData->DSsbuffer);
 262     IDirectSoundBuffer_Release(pData->DSpbuffer);
 263     IDirectSound_Release(pData->lpDS);
 264
 265     //Deinit COM
 266     CoUninitialize();
 267
 268     free(pData);
 269     device->ExtraData = NULL;
 270 }
 271
 272
 273 static ALCboolean DSoundOpenCapture(ALCdevice *pDevice, const ALCchar *deviceName, ALCuint frequency, ALCenum format, ALCsizei SampleSize)
 274 {
 275     (void)pDevice;
 276     (void)deviceName;
 277     (void)frequency;
 278     (void)format;
 279     (void)SampleSize;
 280     return ALC_FALSE;
 281 }
 282
 283 static void DSoundCloseCapture(ALCdevice *pDevice)
 284 {
 285     (void)pDevice;
 286 }
 287
 288 static void DSoundStartCapture(ALCdevice *pDevice)
 289 {
 290     (void)pDevice;
 291 }
 292
 293 static void DSoundStopCapture(ALCdevice *pDevice)
 294 {
 295     (void)pDevice;
 296 }
 297
 298 static void DSoundCaptureSamples(ALCdevice *pDevice, ALCvoid *pBuffer, ALCuint lSamples)
 299 {
 300     (void)pDevice;
 301     (void)pBuffer;
 302     (void)lSamples;
 303 }
 304
 305 static ALCuint DSoundAvailableSamples(ALCdevice *pDevice)
 306 {
 307     (void)pDevice;
 308     return 0;
 309 }
 310
 311
 312 BackendFuncs DSoundFuncs = {
 313     DSoundOpenPlayback,
 314     DSoundClosePlayback,
 315     DSoundOpenCapture,
 316     DSoundCloseCapture,
 317     DSoundStartCapture,
 318     DSoundStopCapture,
 319     DSoundCaptureSamples,
 320     DSoundAvailableSamples
 321 };
 322
 323 void alcDSoundInit(BackendFuncs *FuncList)
 324 {
 325     *FuncList = DSoundFuncs;
 326
 327     DeviceList[0] = AppendDeviceList("DirectSound Software");
 328     AppendAllDeviceList(DeviceList[0]);
 329 }