Initial MIDI support on Mac OS X (4/8)

[Emmanuel Maillard]

Changelog :
- implement MIDIOut_Prepare and MIDIOut_Unprepare

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From 7dca0911ba800151f0be6fbcca5bfad90dd64465 Mon Sep 17 00:00:00 2001
From: Emmanuel Maillard <mahanuu at free.fr>
Date: Wed, 25 Apr 2007 00:59:38 +0200
Subject: [PATCH] - implement MIDIOut_Prepare and MIDIOut_Unprepare

---
 dlls/winecoreaudio.drv/midi.c |   59 ++++++++++++++++++++++++++++++++++++++--
 1 files changed, 56 insertions(+), 3 deletions(-)

diff --git a/dlls/winecoreaudio.drv/midi.c b/dlls/winecoreaudio.drv/midi.c
index a929e1a..4bc6107 100644
--- a/dlls/winecoreaudio.drv/midi.c
+++ b/dlls/winecoreaudio.drv/midi.c
@@ -266,6 +266,58 @@ static DWORD MIDIOut_Close(WORD wDevID)
     return ret;
 }
 
+
+/**************************************************************************
+ * 			MIDIOut_Prepare				[internal]
+ */
+static DWORD MIDIOut_Prepare(WORD wDevID, LPMIDIHDR lpMidiHdr, DWORD dwSize)
+{
+    TRACE("wDevID=%d lpMidiHdr=%p dwSize=%d\n", wDevID, lpMidiHdr, dwSize);
+
+    if (wDevID >= MIDIOut_NumDevs) {
+        WARN("bad device ID : %d\n", wDevID);
+	return MMSYSERR_BADDEVICEID;
+    }
+
+    /* MS doc says that dwFlags must be set to zero, but (kinda funny) MS mciseq drivers
+     * asks to prepare MIDIHDR which dwFlags != 0.
+     * So at least check for the inqueue flag
+     */
+    if (dwSize < sizeof(MIDIHDR) || lpMidiHdr == 0 ||
+	lpMidiHdr->lpData == 0 || (lpMidiHdr->dwFlags & MHDR_INQUEUE) != 0 ||
+	lpMidiHdr->dwBufferLength >= 0x10000ul) {
+	WARN("%p %p %08x %lu/%d\n", lpMidiHdr, lpMidiHdr->lpData,
+	           lpMidiHdr->dwFlags, sizeof(MIDIHDR), dwSize);
+	return MMSYSERR_INVALPARAM;
+    }
+
+    lpMidiHdr->lpNext = 0;
+    lpMidiHdr->dwFlags |= MHDR_PREPARED;
+    lpMidiHdr->dwFlags &= ~MHDR_DONE;
+    return MMSYSERR_NOERROR;
+}
+
+/**************************************************************************
+ * 				MIDIOut_Unprepare			[internal]
+ */
+static DWORD MIDIOut_Unprepare(WORD wDevID, LPMIDIHDR lpMidiHdr, DWORD dwSize)
+{
+    TRACE("wDevID=%d lpMidiHdr=%p dwSize=%d\n", wDevID, lpMidiHdr, dwSize);
+
+    if (wDevID >= MIDIOut_NumDevs) {
+        WARN("bad device ID : %d\n", wDevID);
+	return MMSYSERR_BADDEVICEID;
+    }
+    if (dwSize < sizeof(MIDIHDR) || lpMidiHdr == 0)
+	return MMSYSERR_INVALPARAM;
+    if (lpMidiHdr->dwFlags & MHDR_INQUEUE)
+	return MIDIERR_STILLPLAYING;
+    
+    lpMidiHdr->dwFlags &= ~MHDR_PREPARED;
+    
+    return MMSYSERR_NOERROR;
+}
+
 static DWORD MIDIOut_GetDevCaps(WORD wDevID, LPMIDIOUTCAPSW lpCaps, DWORD dwSize)
 {
     TRACE("wDevID=%d lpCaps=%p dwSize=%d\n", wDevID, lpCaps, dwSize);
@@ -308,15 +360,16 @@ DWORD WINAPI CoreAudio_modMessage(UINT w
             return MIDIOut_Close(wDevID);
         case MODM_DATA:
         case MODM_LONGDATA:
+            TRACE("Unsupported message (08%x)\n", wMsg);
+            return MMSYSERR_NOTSUPPORTED;
         case MODM_PREPARE:
+                return MIDIOut_Prepare(wDevID, (LPMIDIHDR)dwParam1, dwParam2);
         case MODM_UNPREPARE:
-                TRACE("Unsupported message (08%x)\n", wMsg);
-                return MMSYSERR_NOTSUPPORTED;
+            return MIDIOut_Unprepare(wDevID, (LPMIDIHDR)dwParam1, dwParam2);
         case MODM_GETDEVCAPS:
             return MIDIOut_GetDevCaps(wDevID, (LPMIDIOUTCAPSW) dwParam1, dwParam2);
         case MODM_GETNUMDEVS:
             return MIDIOut_GetNumDevs();
-            
         case MODM_GETVOLUME:
         case MODM_SETVOLUME:
         case MODM_RESET:
-- 
1.4.4