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authorFire-Head <Fire-Head@users.noreply.github.com>2019-06-02 05:00:38 +0200
committerFire-Head <Fire-Head@users.noreply.github.com>2019-06-02 05:00:38 +0200
commitb1f9e28cd155459ab2843690c248ed9f4767bc3f (patch)
tree8e7d2a33d4c5109ea3c3562940268afc57d0915c /dxsdk/Include/dmusbuff.h
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-rw-r--r--dxsdk/Include/dmusbuff.h41
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diff --git a/dxsdk/Include/dmusbuff.h b/dxsdk/Include/dmusbuff.h
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+/***************************************************************************
+* *
+* DMusBuff.h -- This module defines the buffer format for DirectMusic *
+* Shared file between user mode and kernel mode components *
+* *
+* Copyright (c) 1998, Microsoft Corp. All rights reserved. *
+* *
+***************************************************************************/
+
+#ifndef _DMusBuff_
+#define _DMusBuff_
+
+/* Format of DirectMusic events in a buffer
+ *
+ * A buffer contains 1 or more events, each with the following header.
+ * Immediately following the header is the event data. The header+data
+ * size is rounded to the nearest quadword (8 bytes).
+ */
+
+#include <pshpack4.h> /* Do not pad at end - that's where the data is */
+typedef struct _DMUS_EVENTHEADER *LPDMUS_EVENTHEADER;
+typedef struct _DMUS_EVENTHEADER
+{
+ DWORD cbEvent; /* Unrounded bytes in event */
+ DWORD dwChannelGroup; /* Channel group of event */
+ REFERENCE_TIME rtDelta; /* Delta from start time of entire buffer */
+ DWORD dwFlags; /* Flags DMUS_EVENT_xxx */
+} DMUS_EVENTHEADER;
+#include <poppack.h>
+
+#define DMUS_EVENT_STRUCTURED 0x00000001 /* Unstructured data (SysEx, etc.) */
+
+/* The number of bytes to allocate for an event with 'cb' data bytes.
+ */
+#define QWORD_ALIGN(x) (((x) + 7) & ~7)
+#define DMUS_EVENT_SIZE(cb) QWORD_ALIGN(sizeof(DMUS_EVENTHEADER) + cb)
+
+
+#endif /* _DMusBuff_ */
+
+