dsound: Support quadraphonic sound.

dlls/dsound/dsound.c

@@ -606,6 +606,19 @@ void DSOUND_ParseSpeakerConfig(DirectSoundDevice *device)
             device->lfe_channel = -1;
         break;
 
+        case DSSPEAKER_QUAD:
+            device->speaker_angles[0] = M_PI/180.0f * -135.0f;
+            device->speaker_angles[1] = M_PI/180.0f *  -45.0f;
+            device->speaker_angles[2] = M_PI/180.0f *   45.0f;
+            device->speaker_angles[3] = M_PI/180.0f *  135.0f;
+            device->speaker_num[0] = 2; /* Rear left */
+            device->speaker_num[1] = 0; /* Front left */
+            device->speaker_num[2] = 1; /* Front right */
+            device->speaker_num[3] = 3; /* Rear right */
+            device->num_speakers = 4;
+            device->lfe_channel = -1;
+        break;
+
         default:
             WARN("unknown speaker_config %u\n", device->speaker_config);
     }

dlls/dsound/dsound_convert.c

@@ -165,6 +165,25 @@ void put_mono2stereo(const IDirectSoundBufferImpl *dsb, DWORD pos, DWORD channel
     dsb->put_aux(dsb, pos, 1, value);
 }
 
+void put_mono2quad(const IDirectSoundBufferImpl *dsb, DWORD pos, DWORD channel, float value)
+{
+    dsb->put_aux(dsb, pos, 0, value);
+    dsb->put_aux(dsb, pos, 1, value);
+    dsb->put_aux(dsb, pos, 2, value);
+    dsb->put_aux(dsb, pos, 3, value);
+}
+
+void put_stereo2quad(const IDirectSoundBufferImpl *dsb, DWORD pos, DWORD channel, float value)
+{
+    if (channel == 0) { /* Left */
+        dsb->put_aux(dsb, pos, 0, value); /* Front left */
+        dsb->put_aux(dsb, pos, 2, value); /* Back left */
+    } else if (channel == 1) { /* Right */
+        dsb->put_aux(dsb, pos, 1, value); /* Front right */
+        dsb->put_aux(dsb, pos, 3, value); /* Back right */
+    }
+}
+
 void mixieee32(float *src, float *dst, unsigned samples)
 {
     TRACE("%p - %p %d\n", src, dst, samples);

dlls/dsound/dsound_private.h

@@ -30,7 +30,7 @@
 
 #include "wine/list.h"
 
-#define DS_MAX_CHANNELS 2
+#define DS_MAX_CHANNELS 4
 
 extern int ds_hel_buflen DECLSPEC_HIDDEN;
 extern int ds_snd_queue_max DECLSPEC_HIDDEN;
@@ -179,6 +179,8 @@ struct IDirectSoundBufferImpl
 
 float get_mono(const IDirectSoundBufferImpl *dsb, DWORD pos, DWORD channel) DECLSPEC_HIDDEN;
 void put_mono2stereo(const IDirectSoundBufferImpl *dsb, DWORD pos, DWORD channel, float value) DECLSPEC_HIDDEN;
+void put_mono2quad(const IDirectSoundBufferImpl *dsb, DWORD pos, DWORD channel, float value) DECLSPEC_HIDDEN;
+void put_stereo2quad(const IDirectSoundBufferImpl *dsb, DWORD pos, DWORD channel, float value) DECLSPEC_HIDDEN;
 
 HRESULT IDirectSoundBufferImpl_Create(
     DirectSoundDevice *device,

dlls/dsound/mixer.c

@@ -151,13 +151,22 @@ void DSOUND_RecalcFormat(IDirectSoundBufferImpl *dsb)
 	else if (ichannels == 1)
 	{
 		dsb->mix_channels = 1;
-		dsb->put = put_mono2stereo;
+
+		if (ochannels == 2)
+			dsb->put = put_mono2stereo;
+		else if (ochannels == 4)
+			dsb->put = put_mono2quad;
 	}
 	else if (ochannels == 1)
 	{
 		dsb->mix_channels = 1;
 		dsb->get = get_mono;
 	}
+	else if (ichannels == 2 && ochannels == 4)
+	{
+		dsb->mix_channels = 2;
+		dsb->put = put_stereo2quad;
+	}
 	else
 	{
 		if (ichannels > 2)

dlls/dsound/primary.c

@@ -67,6 +67,9 @@ static DWORD speaker_config_to_channel_mask(DWORD speaker_config)
         case DSSPEAKER_STEREO:
         case DSSPEAKER_HEADPHONE:
             return SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT;
+
+        case DSSPEAKER_QUAD:
+            return SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT;
     }
 
     WARN("unknown speaker_config %u\n", speaker_config);
@@ -192,7 +195,9 @@ static DWORD DSOUND_FindSpeakerConfig(IMMDevice *mmdevice)
     PropVariantClear(&pv);
     IPropertyStore_Release(store);
 
-    if ((phys_speakers & KSAUDIO_SPEAKER_STEREO) == KSAUDIO_SPEAKER_STEREO)
+    if ((phys_speakers & KSAUDIO_SPEAKER_QUAD) == KSAUDIO_SPEAKER_QUAD)
+        return DSSPEAKER_QUAD;
+    else if ((phys_speakers & KSAUDIO_SPEAKER_STEREO) == KSAUDIO_SPEAKER_STEREO)
         return DSSPEAKER_COMBINED(DSSPEAKER_STEREO, DSSPEAKER_GEOMETRY_WIDE);
     else if ((phys_speakers & KSAUDIO_SPEAKER_MONO) == KSAUDIO_SPEAKER_MONO)
         return DSSPEAKER_MONO;