Add an extension to pause audio processing

2 files changed, 66 insertions, 1 deletions

diff --git a/Alc/ALc.c b/Alc/ALc.c
index 3237dcd8..7b08134c 100644
--- a/Alc/ALc.c
+++ b/Alc/ALc.c
@@ -150,6 +150,9 @@ static const ALCfunction alcFunctions[] = {
     DECL(alcIsRenderFormatSupportedSOFT),
     DECL(alcRenderSamplesSOFT),
 
+    DECL(alcDevicePauseSOFT),
+    DECL(alcDeviceResumeSOFT),
+
     DECL(alEnable),
     DECL(alDisable),
     DECL(alIsEnabled),
@@ -742,7 +745,7 @@ static const ALCchar alcExtensionList[] =
     "ALC_ENUMERATE_ALL_EXT ALC_ENUMERATION_EXT ALC_EXT_CAPTURE "
     "ALC_EXT_DEDICATED ALC_EXT_disconnect ALC_EXT_EFX "
     "ALC_EXT_thread_local_context ALC_SOFTX_HRTF ALC_SOFT_loopback "
-    "ALC_SOFTX_midi_interface";
+    "ALC_SOFTX_midi_interface ALC_SOFTX_pause_device";
 static const ALCint alcMajorVersion = 1;
 static const ALCint alcMinorVersion = 1;
 
@@ -3492,3 +3495,55 @@ FORCE_ALIGN ALC_API void ALC_APIENTRY alcRenderSamplesSOFT(ALCdevice *device, AL
         aluMixData(device, buffer, samples);
     if(device) ALCdevice_DecRef(device);
 }
+
+
+/************************************************
+ * ALC DSP pause/resume functions
+ ************************************************/
+
+/* alcDevicePauseSOFT
+ *
+ * Pause the DSP to stop audio processing.
+ */
+ALC_API void ALC_APIENTRY alcDevicePauseSOFT(ALCdevice *device)
+{
+    if(!(device=VerifyDevice(device)) || device->Type != Playback)
+        alcSetError(device, ALC_INVALID_DEVICE);
+    else
+    {
+        LockLists();
+        if((device->Flags&DEVICE_RUNNING))
+            V0(device->Backend,stop)();
+        device->Flags &= ~DEVICE_RUNNING;
+        UnlockLists();
+    }
+    if(device) ALCdevice_DecRef(device);
+}
+
+/* alcDeviceResumeSOFT
+ *
+ * Resume the DSP to restart audio processing.
+ */
+ALC_API void ALC_APIENTRY alcDeviceResumeSOFT(ALCdevice *device)
+{
+    if(!(device=VerifyDevice(device)) || device->Type != Playback)
+        alcSetError(device, ALC_INVALID_DEVICE);
+    else
+    {
+        LockLists();
+        if(device->ContextList)
+        {
+            if(V0(device->Backend,start)() != ALC_FALSE)
+                device->Flags |= DEVICE_RUNNING;
+            else
+            {
+                alcSetError(device, ALC_INVALID_DEVICE);
+                ALCdevice_Lock(device);
+                aluHandleDisconnect(device);
+                ALCdevice_Unlock(device);
+            }
+        }
+        UnlockLists();
+    }
+    if(device) ALCdevice_DecRef(device);
+}
diff --git a/OpenAL32/Include/alMain.h b/OpenAL32/Include/alMain.h
index 95f6a719..987254fc 100644
--- a/OpenAL32/Include/alMain.h
+++ b/OpenAL32/Include/alMain.h
@@ -216,6 +216,16 @@ AL_API void AL_APIENTRY alLoadSoundfontSOFT(ALuint id, size_t(*cb)(ALvoid*,size_
 #endif
 #endif
 
+#ifndef ALC_SOFT_pause_device
+#define ALC_SOFT_pause_device 1
+typedef void (ALC_APIENTRY*LPALCDEVICEPAUSESOFT)(ALCdevice *device);
+typedef void (ALC_APIENTRY*LPALCDEVICERESUMESOFT)(ALCdevice *device);
+#ifdef AL_ALEXT_PROTOTYPES
+ALC_API void ALC_APIENTRY alcDevicePauseSOFT(ALCdevice *device);
+ALC_API void ALC_APIENTRY alcDeviceResumeSOFT(ALCdevice *device);
+#endif
+#endif
+
 
 #ifdef IN_IDE_PARSER
 /* KDevelop's parser doesn't recognize the C99-standard restrict keyword, but