[PATCH 3/6] winecoreaudio: Move the midi input event processing to the unixlib. - wine-devel

30 Nov 2021

Notifications of incoming data are now directly added to a notify
ring-buffer by macOS's midi read callback.  The ring-buffer is
implemented with an unused sentinel directly before the read ptr to
distinguish between the full vs empty state.  Notifications are
processed by the client's notify thread via the midi_notify_wait
syscall.
Note that the read callback thread is not a Win32 thread, so the
Win32 api cannot be used in anything that it calls.
Signed-off-by: Huw Davies huw@codeweavers.com
---
 dlls/winecoreaudio.drv/coreaudio.c |   2 -
 dlls/winecoreaudio.drv/coremidi.c  | 163 +++++++++++++++++++----
 dlls/winecoreaudio.drv/coremidi.h  |  86 ------------
 dlls/winecoreaudio.drv/midi.c      | 204 +----------------------------
 dlls/winecoreaudio.drv/unixlib.h   |   6 +-
 5 files changed, 140 insertions(+), 321 deletions(-)
 delete mode 100644 dlls/winecoreaudio.drv/coremidi.h

diff --git a/dlls/winecoreaudio.drv/coreaudio.c b/dlls/winecoreaudio.drv/coreaudio.c
index 1efcfdba3f4..e6ce5c33e36 100644
--- a/dlls/winecoreaudio.drv/coreaudio.c
+++ b/dlls/winecoreaudio.drv/coreaudio.c
@@ -1634,6 +1634,4 @@ unixlib_entry_t __wine_unix_call_funcs[] =
     midi_out_message,
     midi_in_message,
     midi_notify_wait,
-
-    midi_in_lock, /* temporary */
 };
diff --git a/dlls/winecoreaudio.drv/coremidi.c b/dlls/winecoreaudio.drv/coremidi.c
index bb8cb23f83b..ae8b71e002b 100644
--- a/dlls/winecoreaudio.drv/coremidi.c
+++ b/dlls/winecoreaudio.drv/coremidi.c
@@ -89,7 +89,6 @@
 #include "wine/unixlib.h"
#include "coreaudio.h"
-#include "coremidi.h"
 #include "unixlib.h"
WINE_DEFAULT_DEBUG_CHANNEL(midi);
@@ -107,12 +106,24 @@ struct midi_dest
     WORD wFlags;
 };
+struct midi_src
+{
+    MIDIEndpointRef source;
+
+    WORD wDevID;
+    int state; /* 0 is no recording started, 1 in recording, bit 2 set if in sys exclusive recording */
+    MIDIINCAPSW caps;
+    MIDIOPENDESC midiDesc;
+    LPMIDIHDR lpQueueHdr;
+    WORD wFlags;
+    DWORD startTime;
+};
+
 static MIDIClientRef midi_client;
 static MIDIPortRef midi_out_port, midi_in_port;
 static UINT num_dests, num_srcs;
 static struct midi_dest *dests;
 static struct midi_src *srcs;
-static CFStringRef midi_in_thread_port_name;
static pthread_mutex_t midi_in_mutex = PTHREAD_MUTEX_INITIALIZER;
@@ -123,6 +134,8 @@ static BOOL notify_quit;
 static struct notify_context notify_buffer[NOTIFY_BUFFER_SIZE];
 static struct notify_context *notify_read, *notify_write;
+#define MAX_MIDI_SYNTHS 1
+
 NTSTATUS midi_in_lock(void *args)
 {
     BOOL lock = !!args;
@@ -146,11 +159,49 @@ static void set_in_notify(struct notify_context *notify, struct midi_src *src, W
     notify->instance = src->midiDesc.dwInstance;
 }
+/*
+ * notify buffer: The notification ring buffer is implemented so that
+ * there is always at least one unused sentinel before the current
+ * read position in order to allow detection of the full vs empty
+ * state.
+ */
+static struct notify_context *notify_buffer_next(struct notify_context *notify)
+{
+    if (++notify >= notify_buffer + ARRAY_SIZE(notify_buffer))
+        notify = notify_buffer;
+
+    return notify;
+}
+
+static void notify_buffer_add(struct notify_context *notify)
+{
+    struct notify_context *next = notify_buffer_next(notify_write);
+
+    if (next == notify_read) /* buffer is full - we can't issue a WARN() in a non-Win32 thread */
+        notify_read = notify_buffer_next(notify_read); /* drop the oldest notification */
+    *notify_write = *notify;
+    notify_write = next;
+}
+
+static BOOL notify_buffer_empty(void)
+{
+    return notify_read == notify_write;
+}
+
+static BOOL notify_buffer_remove(struct notify_context *notify)
+{
+    if (notify_buffer_empty()) return FALSE;
+
+    *notify = *notify_read;
+    notify_read = notify_buffer_next(notify_read);
+    return TRUE;
+}
+
 static void notify_post(struct notify_context *notify)
 {
     pthread_mutex_lock(&notify_mutex);
-    if (notify) FIXME("Not yet handled\n");
+    if (notify) notify_buffer_add(notify);
     else notify_quit = TRUE;
     pthread_cond_signal(&notify_cond);
@@ -169,29 +220,94 @@ static uint64_t get_time_ms(void)
     return mach_absolute_time() / 1000000 * timebase.numer / timebase.denom;
 }
+static void process_sysex_packet(struct midi_src *src, MIDIPacket *packet)
+{
+    unsigned int pos = 0, len = packet->length, copy_len;
+    DWORD current_time = get_time_ms() - src->startTime;
+    struct notify_context notify;
+
+    src->state |= 2;
+
+    midi_in_lock((void *)TRUE);
+
+    while (len)
+    {
+        MIDIHDR *hdr = src->lpQueueHdr;
+        if (!hdr) break;
+
+        copy_len = min(len, hdr->dwBufferLength - hdr->dwBytesRecorded);
+        memcpy(hdr->lpData + hdr->dwBytesRecorded, packet->data + pos, copy_len);
+        hdr->dwBytesRecorded += copy_len;
+        len -= copy_len;
+        pos += copy_len;
+
+        if ((hdr->dwBytesRecorded == hdr->dwBufferLength) ||
+            (*(BYTE*)(hdr->lpData + hdr->dwBytesRecorded - 1) == 0xf7))
+        { /* buffer full or end of sysex message */
+            src->lpQueueHdr = hdr->lpNext;
+            hdr->dwFlags &= ~MHDR_INQUEUE;
+            hdr->dwFlags |= MHDR_DONE;
+            set_in_notify(&notify, src, src->wDevID, MIM_LONGDATA, (DWORD_PTR)hdr, current_time);
+            notify_post(&notify);
+            src->state &= ~2;
+        }
+    }
+
+    midi_in_lock((void *)FALSE);
+}
+
+static void process_small_packet(struct midi_src *src, MIDIPacket *packet)
+{
+    DWORD current_time = get_time_ms() - src->startTime, data;
+    struct notify_context notify;
+    unsigned int pos = 0;
+
+    while (pos < packet->length)
+    {
+        data = 0;
+        switch (packet->data[pos] & 0xf0)
+        {
+        case 0xf0:
+            data = packet->data[pos];
+            pos++;
+            break;
+        case 0xc0:
+        case 0xd0:
+            data = (packet->data[pos + 1] <<  8) | packet->data[pos];
+            pos += 2;
+            break;
+        default:
+            data = (packet->data[pos + 2] << 16) | (packet->data[pos + 1] <<  8) |
+                packet->data[pos];
+            pos += 3;
+            break;
+        }
+        set_in_notify(&notify, src, src->wDevID, MIM_DATA, data, current_time);
+        notify_post(&notify);
+    }
+}
+
 static void midi_in_read_proc(const MIDIPacketList *pktlist, void *refCon, void *connRefCon)
 {
-    CFMessagePortRef msg_port = CFMessagePortCreateRemote(kCFAllocatorDefault, midi_in_thread_port_name);
     MIDIPacket *packet = (MIDIPacket *)pktlist->packet;
-    CFMutableDataRef data;
-    MIDIMessage msg;
+    WORD dev_id = *(WORD *)connRefCon;
+    struct midi_src *src;
     unsigned int i;
+    if (dev_id >= num_srcs) return;
+    src = srcs + dev_id;
+    if (src->state < 1) /* input not started */
+        return;
+
     for (i = 0; i < pktlist->numPackets; ++i)
     {
-        msg.devID = *(UInt16 *)connRefCon;
-        msg.length = packet->length;
-        data = CFDataCreateMutable(kCFAllocatorDefault, sizeof(msg) + packet->length);
-        if (data)
-        {
-            CFDataAppendBytes(data, (UInt8 *)&msg, sizeof(msg));
-            CFDataAppendBytes(data, packet->data, packet->length);
-            CFMessagePortSendRequest(msg_port, 0, data, 0.0, 0.0, NULL, NULL);
-            CFRelease(data);
-        }
+        if (packet->data[0] == 0xf0 || src->state & 2)
+            process_sysex_packet(src, packet);
+        else
+            process_small_packet(src, packet);
+
         packet = MIDIPacketNext(packet);
     }
-    CFRelease(msg_port);
 }
NTSTATUS midi_init(void *args)
@@ -225,7 +341,6 @@ NTSTATUS midi_init(void *args)
if (num_srcs > 0)
     {
-        midi_in_thread_port_name = CFStringCreateWithFormat(kCFAllocatorDefault, NULL, CFSTR("MIDIInThreadPortName.%u"), getpid());
         name = CFStringCreateWithFormat(kCFAllocatorDefault, NULL, CFSTR("WineInputPort.%u"), getpid());
         MIDIInputPortCreate(midi_client, name, midi_in_read_proc, NULL, &midi_in_port);
         CFRelease(name);
@@ -306,8 +421,6 @@ NTSTATUS midi_init(void *args)
     }
params->num_srcs = num_srcs;
-    params->srcs = srcs;
-    params->midi_in_port = (void *)midi_in_port;
*params->err = DRV_SUCCESS;
     return STATUS_SUCCESS;
@@ -315,15 +428,8 @@ NTSTATUS midi_init(void *args)
NTSTATUS midi_release(void *args)
 {
-    CFMessagePortRef msg_port;
-
     if (num_srcs)
     {
-        /* Stop CFRunLoop in MIDIIn_MessageThread */
-        msg_port = CFMessagePortCreateRemote(kCFAllocatorDefault, midi_in_thread_port_name);
-        CFMessagePortSendRequest(msg_port, 1, NULL, 0.0, 0.0, NULL, NULL);
-        CFRelease(msg_port);
-
         /* stop the notify_wait thread */
         notify_post(NULL);
     }
@@ -1114,10 +1220,11 @@ NTSTATUS midi_notify_wait(void *args)
pthread_mutex_lock(&notify_mutex);
-    while (!notify_quit)
+    while (!notify_quit && notify_buffer_empty())
         pthread_cond_wait(&notify_cond, &notify_mutex);
*params->quit = notify_quit;
+    if (!notify_quit) notify_buffer_remove(params->notify);
pthread_mutex_unlock(&notify_mutex);
diff --git a/dlls/winecoreaudio.drv/coremidi.h b/dlls/winecoreaudio.drv/coremidi.h
deleted file mode 100644
index e6d5c8c18c8..00000000000
--- a/dlls/winecoreaudio.drv/coremidi.h
+++ /dev/null
@@ -1,86 +0,0 @@
-/*
- * Wine Midi driver for Mac OS X
- *
- * Copyright 2006 Emmanuel Maillard
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
- */
-
-#ifndef WINE_COREMIDI_H
-#define WINE_COREMIDI_H
-
-#include <CoreFoundation/CoreFoundation.h>
-
-#define MAX_MIDI_SYNTHS 1
-
-#ifdef WINE_DEFINITIONS
-/*
- * Due to CoreMIDI headers conflict redefine some types for Wine
- */
-typedef void *MIDIClientRef;
-typedef void *MIDIEndpointRef;
-typedef void *MIDIPortRef;
-typedef void *MIDIObjectRef;
-
-typedef struct MIDIPacketList MIDIPacketList;
-
-/*
- * functions
- */
-extern OSStatus MIDIClientDispose(MIDIClientRef client);
-extern unsigned MIDIGetNumberOfDestinations(void);
-extern MIDIEndpointRef MIDIGetDestination(unsigned i);
-extern unsigned MIDIGetNumberOfSources(void);
-extern MIDIEndpointRef MIDIGetSource(unsigned i);
-extern OSStatus MIDIOutputPortCreate(MIDIClientRef client, CFStringRef portName, MIDIPortRef *outPort);
-
-typedef void (*MIDIReadProc)(const MIDIPacketList *pktlist, void *readProcRefCon, void *srcConnRefCon);
-extern OSStatus MIDIInputPortCreate(MIDIClientRef client, CFStringRef portName, MIDIReadProc readProc, void *refCon, MIDIPortRef *outPort);
-
-extern OSStatus MIDIObjectGetProperties(MIDIObjectRef obj, CFPropertyListRef *outProperties, Boolean deep);
-
-extern OSStatus MIDIPortConnectSource(MIDIPortRef port, MIDIEndpointRef source, void *connRefCon);
-
-/*
- * Due to AudioUnit headers conflict redefine some types.
- */
-typedef void *AudioUnit;
-typedef void *AUGraph;
-
-extern OSStatus MusicDeviceMIDIEvent(AudioUnit au, UInt32 inStatus, UInt32 inData1, UInt32 inData2, UInt32 inOffsetSampleFrame);
-extern OSStatus MusicDeviceSysEx(AudioUnit au, const UInt8 *inData, UInt32 inLength);
-#endif
-
-/* midi.c */
-typedef struct midi_src
-{
-    MIDIEndpointRef source;
-
-    WORD wDevID;
-    int state; /* 0 is no recording started, 1 in recording, bit 2 set if in sys exclusive recording */
-    MIDIINCAPSW caps;
-    MIDIOPENDESC midiDesc;
-    LPMIDIHDR lpQueueHdr;
-    WORD wFlags;
-    DWORD startTime;
-} MIDISource;
-
-typedef struct {
-    UInt16 devID;
-    UInt16 length;
-    Byte data[];
-} MIDIMessage;
-
-#endif
diff --git a/dlls/winecoreaudio.drv/midi.c b/dlls/winecoreaudio.drv/midi.c
index e9cdb2a8ec4..262713dd003 100644
--- a/dlls/winecoreaudio.drv/midi.c
+++ b/dlls/winecoreaudio.drv/midi.c
@@ -45,31 +45,8 @@
WINE_DEFAULT_DEBUG_CHANNEL(midi);
-#include <mach/mach_time.h>
-#include <CoreAudio/CoreAudio.h>
-
-#define WINE_DEFINITIONS
-#include "coremidi.h"
-
 static DWORD MIDIIn_NumDevs = 0;
-
-static CFStringRef MIDIInThreadPortName;
-
-static DWORD WINAPI MIDIIn_MessageThread(LPVOID p);
-
-static MIDIPortRef MIDIInPort = NULL;
-
-MIDISource *sources;
-
-static uint64_t get_time_ms(void)
-{
-    static mach_timebase_info_data_t timebase;
-
-    if (!timebase.denom) mach_timebase_info(&timebase);
-    return mach_absolute_time() / 1000000 * timebase.numer / timebase.denom;
-}
-
 static void notify_client(struct notify_context *notify)
 {
     TRACE("dev_id=%d msg=%d param1=%04lX param2=%04lX\n", notify->dev_id, notify->msg, notify->param_1, notify->param_2);
@@ -81,14 +58,17 @@ static void notify_client(struct notify_context *notify)
 static DWORD WINAPI notify_thread(void *p)
 {
     struct midi_notify_wait_params params;
+    struct notify_context notify;
     BOOL quit;
+    params.notify = &notify;
     params.quit = &quit;
while (1)
     {
         UNIX_CALL(midi_notify_wait, &params);
         if (quit) break;
+        if (notify.send_notify) notify_client(&notify);
     }
     return 0;
 }
@@ -108,15 +88,10 @@ static LONG CoreAudio_MIDIInit(void)
     }
MIDIIn_NumDevs = params.num_srcs;
-    sources = params.srcs;
-    MIDIInPort = params.midi_in_port;
if (MIDIIn_NumDevs > 0)
-    {
-        MIDIInThreadPortName = CFStringCreateWithFormat(kCFAllocatorDefault, NULL, CFSTR("MIDIInThreadPortName.%u"), getpid());
-        CloseHandle( CreateThread(NULL, 0, MIDIIn_MessageThread, NULL, 0, NULL));
         CloseHandle(CreateThread(NULL, 0, notify_thread, NULL, 0, NULL));
-    }
+
     return err;
 }
@@ -125,181 +100,10 @@ static LONG CoreAudio_MIDIRelease(void)
     TRACE("\n");
UNIX_CALL(midi_release, NULL);
-    sources = NULL;
return DRV_SUCCESS;
 }
-
-/**************************************************************************
- * 			MIDI_NotifyClient			[internal]
- */
-static void MIDI_NotifyClient(UINT wDevID, WORD wMsg, DWORD_PTR dwParam1, DWORD_PTR dwParam2)
-{
-    DWORD_PTR 		dwCallBack;
-    UINT 		uFlags;
-    HANDLE		hDev;
-    DWORD_PTR 		dwInstance;
-
-    TRACE("wDevID=%d wMsg=%d dwParm1=%04lX dwParam2=%04lX\n", wDevID, wMsg, dwParam1, dwParam2);
-
-    switch (wMsg) {
-    case MIM_DATA:
-    case MIM_LONGDATA:
-    case MIM_ERROR:
-    case MIM_LONGERROR:
-    case MIM_MOREDATA:
-        dwCallBack = sources[wDevID].midiDesc.dwCallback;
-	uFlags = sources[wDevID].wFlags;
-	hDev = sources[wDevID].midiDesc.hMidi;
-	dwInstance = sources[wDevID].midiDesc.dwInstance;
-        break;
-    default:
-	ERR("Unsupported MSW-MIDI message %u\n", wMsg);
-	return;
-    }
-
-    DriverCallback(dwCallBack, uFlags, hDev, wMsg, dwInstance, dwParam1, dwParam2);
-}
-
-static void midi_lock( BOOL lock )
-{
-    UNIX_CALL(midi_in_lock, (void *)lock);
-}
-
-/*
- * MIDI In Mach message handling
- */
-static CFDataRef MIDIIn_MessageHandler(CFMessagePortRef local, SInt32 msgid, CFDataRef data, void *info)
-{
-    MIDIMessage *msg = NULL;
-    int i = 0;
-    MIDISource *src = NULL;
-    DWORD sendData = 0;
-    int pos = 0;
-    DWORD currentTime;
-    BOOL sysexStart;
-
-    switch (msgid)
-    {
-        case 0:
-            msg = (MIDIMessage *) CFDataGetBytePtr(data);
-            TRACE("devID=%d\n", msg->devID);
-             for (i = 0; i < msg->length; ++i) {
-                TRACE("%02X ", msg->data[i]);
-            }
-            TRACE("\n");
-            src = &sources[msg->devID];
-            if (src->state < 1)
-            {
-                TRACE("input not started, thrown away\n");
-                return NULL;
-            }
-
-            sysexStart = (msg->data[0] == 0xF0);
-
-            if (sysexStart || src->state & 2) {
-                int pos = 0;
-                int len = msg->length;
-
-                if (sysexStart) {
-                    TRACE("Receiving sysex message\n");
-                    src->state |= 2;
-                }
-
-                midi_lock( TRUE );
-                currentTime = get_time_ms() - src->startTime;
-
-                while (len) {
-                    LPMIDIHDR lpMidiHdr = src->lpQueueHdr;
-
-                    if (lpMidiHdr != NULL) {
-                        int copylen = min(len, lpMidiHdr->dwBufferLength - lpMidiHdr->dwBytesRecorded);
-                        memcpy(lpMidiHdr->lpData + lpMidiHdr->dwBytesRecorded, msg->data + pos, copylen);
-                        lpMidiHdr->dwBytesRecorded += copylen;
-                        len -= copylen;
-                        pos += copylen;
-
-                        TRACE("Copied %d bytes of sysex message\n", copylen);
-
-                        if ((lpMidiHdr->dwBytesRecorded == lpMidiHdr->dwBufferLength) ||
-                            (*(BYTE*)(lpMidiHdr->lpData + lpMidiHdr->dwBytesRecorded - 1) == 0xF7)) {
-                            TRACE("Sysex message complete (or buffer limit reached), dispatching %d bytes\n", lpMidiHdr->dwBytesRecorded);
-                            src->lpQueueHdr = lpMidiHdr->lpNext;
-                            lpMidiHdr->dwFlags &= ~MHDR_INQUEUE;
-                            lpMidiHdr->dwFlags |= MHDR_DONE;
-                            MIDI_NotifyClient(msg->devID, MIM_LONGDATA, (DWORD_PTR)lpMidiHdr, currentTime);
-                            src->state &= ~2;
-                        }
-                    }
-                    else {
-                        FIXME("Sysex data received but no buffer to store it!\n");
-                        break;
-                    }
-                }
-
-                midi_lock( FALSE );
-                return NULL;
-            }
-
-            midi_lock( TRUE );
-            currentTime = get_time_ms() - src->startTime;
-
-            while (pos < msg->length)
-            {
-                sendData = 0;
-                switch (msg->data[pos] & 0xF0)
-                {
-                    case 0xF0:
-                        sendData = (msg->data[pos] <<  0);
-                        pos++;
-                        break;
-
-                    case 0xC0:
-                    case 0xD0:
-                        sendData = (msg->data[pos + 1] <<  8) | (msg->data[pos] <<  0);
-                        pos += 2;
-                        break;
-                    default:
-                        sendData = (msg->data[pos + 2] << 16) |
-                                    (msg->data[pos + 1] <<  8) |
-                                    (msg->data[pos] <<  0);
-                        pos += 3;
-                        break;
-                }
-                MIDI_NotifyClient(msg->devID, MIM_DATA, sendData, currentTime);
-            }
-            midi_lock( FALSE );
-            break;
-        default:
-            CFRunLoopStop(CFRunLoopGetCurrent());
-            break;
-    }
-    return NULL;
-}
-
-static DWORD WINAPI MIDIIn_MessageThread(LPVOID p)
-{
-    CFMessagePortRef local;
-    CFRunLoopSourceRef source;
-    Boolean info;
-
-    local = CFMessagePortCreateLocal(kCFAllocatorDefault, MIDIInThreadPortName, &MIDIIn_MessageHandler, NULL, &info);
-
-    source = CFMessagePortCreateRunLoopSource(kCFAllocatorDefault, local, 0);
-    CFRunLoopAddSource(CFRunLoopGetCurrent(), source, kCFRunLoopDefaultMode);
-
-    CFRunLoopRun();
-
-    CFRunLoopSourceInvalidate(source);
-    CFRelease(source);
-    CFRelease(local);
-    CFRelease(MIDIInThreadPortName);
-    MIDIInThreadPortName = NULL;
-
-    return 0;
-}
-
 /**************************************************************************
 * 				modMessage
 */
diff --git a/dlls/winecoreaudio.drv/unixlib.h b/dlls/winecoreaudio.drv/unixlib.h
index 67fcc35ce4c..d44a7a013e8 100644
--- a/dlls/winecoreaudio.drv/unixlib.h
+++ b/dlls/winecoreaudio.drv/unixlib.h
@@ -187,8 +187,6 @@ struct midi_init_params
 {
     DWORD *err;
     UINT num_srcs;
-    void *srcs;
-    void *midi_in_port;
 };
struct notify_context
@@ -228,6 +226,7 @@ struct midi_in_message_params
struct midi_notify_wait_params
 {
+    struct notify_context *notify;
     BOOL *quit;
 };
@@ -258,8 +257,6 @@ enum unix_funcs
     unix_midi_out_message,
     unix_midi_in_message,
     unix_midi_notify_wait,
-
-    unix_midi_in_lock, /* temporary */
 };
NTSTATUS midi_init( void * ) DECLSPEC_HIDDEN;
@@ -267,7 +264,6 @@ NTSTATUS midi_release( void * ) DECLSPEC_HIDDEN;
 NTSTATUS midi_out_message( void * ) DECLSPEC_HIDDEN;
 NTSTATUS midi_in_message( void * ) DECLSPEC_HIDDEN;
 NTSTATUS midi_notify_wait( void * ) DECLSPEC_HIDDEN;
-NTSTATUS midi_in_lock( void * ) DECLSPEC_HIDDEN;
extern unixlib_handle_t coreaudio_handle;
-- 
2.23.0



    