[SDK] One step further towards ReactOS source code tree restructure: the sdk folder...

[reactos.git] / reactos / sdk / lib / drivers / sound / mmebuddy / functiontable.c

diff --git a/reactos/sdk/lib/drivers/sound/mmebuddy/functiontable.c b/reactos/sdk/lib/drivers/sound/mmebuddy/functiontable.c
new file mode 100644 (file)
index 0000000..ce5b38b
--- /dev/null
+++ b/reactos/sdk/lib/drivers/sound/mmebuddy/functiontable.c
@@ -0,0 +1,57 @@
+/*
+ * PROJECT:     ReactOS Sound System "MME Buddy" Library
+ * LICENSE:     GPL - See COPYING in the top level directory
+ * FILE:        lib/drivers/sound/mmebuddy/functiontable.c
+ *
+ * PURPOSE:     Routes function calls through a function table, calling
+ *              implementation-defined routines or a default function, depending
+ *              on configuration.
+ *
+ * PROGRAMMERS: Andrew Greenwood (silverblade@reactos.org)
+*/
+
+#include "precomp.h"
+
+/*
+    Attaches a function table to a sound device. Any NULL entries in this
+    table are automatically set to point to a default routine to handle
+    the appropriate function.
+*/
+MMRESULT
+SetSoundDeviceFunctionTable(
+    IN  PSOUND_DEVICE SoundDevice,
+    IN  PMMFUNCTION_TABLE FunctionTable)
+{
+    VALIDATE_MMSYS_PARAMETER( IsValidSoundDevice(SoundDevice) );
+    VALIDATE_MMSYS_PARAMETER( FunctionTable );
+
+    /* Zero out the existing function table (if present) */
+    ZeroMemory(&SoundDevice->FunctionTable, sizeof(MMFUNCTION_TABLE));
+
+    if ( ! FunctionTable )
+        return MMSYSERR_INVALPARAM;
+
+    /* Fill in the client-supplied functions */
+    CopyMemory(&SoundDevice->FunctionTable,
+                FunctionTable,
+                sizeof(MMFUNCTION_TABLE));
+
+    return MMSYSERR_NOERROR;
+}
+
+/*
+    Retrieves the function table for a sound device, as previously set using
+    SetSoundDeviceFunctionTable.
+*/
+MMRESULT
+GetSoundDeviceFunctionTable(
+    IN  PSOUND_DEVICE SoundDevice,
+    OUT PMMFUNCTION_TABLE* FunctionTable)
+{
+    VALIDATE_MMSYS_PARAMETER( IsValidSoundDevice(SoundDevice) );
+    VALIDATE_MMSYS_PARAMETER( FunctionTable );
+
+    *FunctionTable = &SoundDevice->FunctionTable;
+
+    return MMSYSERR_NOERROR;
+}