dsound: Degrade speaker config if too many channels.

dlls/dsound/dsound_private.h

@@ -219,6 +219,7 @@ HRESULT DSOUND_PrimaryGetPosition(DirectSoundDevice *device, LPDWORD playpos, LP
 LPWAVEFORMATEX DSOUND_CopyFormat(LPCWAVEFORMATEX wfex) DECLSPEC_HIDDEN;
 HRESULT DSOUND_ReopenDevice(DirectSoundDevice *device, BOOL forcewave) DECLSPEC_HIDDEN;
 HRESULT DSOUND_PrimaryOpen(DirectSoundDevice *device) DECLSPEC_HIDDEN;
+DWORD DSOUND_FindSpeakerConfig(IMMDevice *mmdevice, int channels) DECLSPEC_HIDDEN;
 HRESULT primarybuffer_create(DirectSoundDevice *device, IDirectSoundBufferImpl **ppdsb,
     const DSBUFFERDESC *dsbd) DECLSPEC_HIDDEN;
 void primarybuffer_destroy(IDirectSoundBufferImpl *This) DECLSPEC_HIDDEN;

dlls/dsound/primary.c

@@ -93,7 +93,10 @@ static HRESULT DSOUND_WaveFormat(DirectSoundDevice *device, IAudioClient *client
         if (FAILED(hr))
             return hr;
 
-        if (mixwfe->Format.nChannels > device->num_speakers) {
+        if (mixwfe->Format.nChannels < device->num_speakers) {
+            device->speaker_config = DSOUND_FindSpeakerConfig(device->mmdevice, mixwfe->Format.nChannels);
+            DSOUND_ParseSpeakerConfig(device);
+        } else if (mixwfe->Format.nChannels > device->num_speakers) {
             mixwfe->Format.nChannels = device->num_speakers;
             mixwfe->Format.nBlockAlign = mixwfe->Format.nChannels * mixwfe->Format.wBitsPerSample / 8;
             mixwfe->Format.nAvgBytesPerSec = mixwfe->Format.nSamplesPerSec * mixwfe->Format.nBlockAlign;
@@ -163,7 +166,7 @@ static HRESULT DSOUND_WaveFormat(DirectSoundDevice *device, IAudioClient *client
     return S_OK;
 }
 
-static DWORD DSOUND_FindSpeakerConfig(IMMDevice *mmdevice)
+DWORD DSOUND_FindSpeakerConfig(IMMDevice *mmdevice, int channels)
 {
     IPropertyStore *store;
     HRESULT hr;
@@ -198,13 +201,13 @@ static DWORD DSOUND_FindSpeakerConfig(IMMDevice *mmdevice)
     PropVariantClear(&pv);
     IPropertyStore_Release(store);
 
-    if ((phys_speakers & KSAUDIO_SPEAKER_5POINT1) == KSAUDIO_SPEAKER_5POINT1)
+    if ((channels >= 6 || channels == 0) && (phys_speakers & KSAUDIO_SPEAKER_5POINT1) == KSAUDIO_SPEAKER_5POINT1)
         return DSSPEAKER_5POINT1_BACK;
-    else if ((phys_speakers & KSAUDIO_SPEAKER_5POINT1_SURROUND) == KSAUDIO_SPEAKER_5POINT1_SURROUND)
+    else if ((channels >= 6 || channels == 0) && (phys_speakers & KSAUDIO_SPEAKER_5POINT1_SURROUND) == KSAUDIO_SPEAKER_5POINT1_SURROUND)
         return DSSPEAKER_5POINT1_SURROUND;
-    else if ((phys_speakers & KSAUDIO_SPEAKER_QUAD) == KSAUDIO_SPEAKER_QUAD)
+    else if ((channels >= 4 || channels == 0) && (phys_speakers & KSAUDIO_SPEAKER_QUAD) == KSAUDIO_SPEAKER_QUAD)
         return DSSPEAKER_QUAD;
-    else if ((phys_speakers & KSAUDIO_SPEAKER_STEREO) == KSAUDIO_SPEAKER_STEREO)
+    else if ((channels >= 2 || channels == 0) && (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;
@@ -247,7 +250,7 @@ HRESULT DSOUND_ReopenDevice(DirectSoundDevice *device, BOOL forcewave)
         return hres;
     }
 
-    device->speaker_config = DSOUND_FindSpeakerConfig(device->mmdevice);
+    device->speaker_config = DSOUND_FindSpeakerConfig(device->mmdevice, 0);
 
     DSOUND_ParseSpeakerConfig(device);