Akihiro Sagawa : midimap: Handle MIDI running status.

[Alexandre Julliard]

Module: wine
Branch: oldstable
Commit: bdddc8ac70e8e48f12def2dd8d66fb229d1ab37b
URL:    https://gitlab.winehq.org/wine/wine/-/commit/bdddc8ac70e8e48f12def2dd8d66fb2...

Author: Akihiro Sagawa 
Date:   Thu May 26 23:38:43 2022 +0900

midimap: Handle MIDI running status.

Wine's midiOutShortMsg() can't handle the MIDI message if the status
byte is omitted. Omitting status byte is valid and called "running
status".

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=53003
Signed-off-by: Akihiro Sagawa 
Signed-off-by: Andrew Eikum 
Signed-off-by: Alexandre Julliard 
(cherry picked from commit 4c535a7f7546f2dfe504c47dfc416d3cdd0a5ab0)
Signed-off-by: Michael Stefaniuc

---

dlls/midimap/midimap.c | 30 +++++++++++++++++++++++++++---
 1 file changed, 27 insertions(+), 3 deletions(-)

diff --git a/dlls/midimap/midimap.c b/dlls/midimap/midimap.c
index 53eeadee915..a78da7aea42 100644
--- a/dlls/midimap/midimap.c
+++ b/dlls/midimap/midimap.c
@@ -101,6 +101,7 @@ typedef	struct tagMIDIMAPDATA
     struct tagMIDIMAPDATA*	self;
     MIDIOUTPORT*	ChannelMap[16];
     MIDIOPENDESC	midiDesc;
+    BYTE		runningStatus;
     WORD		wCbFlags;
 } MIDIMAPDATA;

@@ -301,6 +302,7 @@ static DWORD modOpen(DWORD_PTR *lpdwUser, LPMIDIOPENDESC lpDesc, DWORD dwFlags)
    mom->self = mom;
    mom->wCbFlags = HIWORD(dwFlags & CALLBACK_TYPEMASK);
    mom->midiDesc = *lpDesc;
+	mom->runningStatus = 0;

for (chn = 0; chn < 16; chn++)
    {
@@ -380,6 +382,7 @@ static DWORD modLongData(MIDIMAPDATA* mom, LPMIDIHDR lpMidiHdr, DWORD_PTR dwPara
        if (ret != MMSYSERR_NOERROR) break;
    }
     }
+    mom->runningStatus = 0;
     lpMidiHdr->dwFlags &= ~MHDR_INQUEUE;
     lpMidiHdr->dwFlags |= MHDR_DONE;
     MIDIMAP_NotifyClient(mom, MOM_DONE, (DWORD_PTR)lpMidiHdr, 0L);
@@ -388,16 +391,31 @@ static DWORD modLongData(MIDIMAPDATA* mom, LPMIDIHDR lpMidiHdr, DWORD_PTR dwPara

static DWORD modData(MIDIMAPDATA* mom, DWORD_PTR dwParam)
 {
-    BYTE	lb = LOBYTE(LOWORD(dwParam));
-    WORD	chn = lb & 0x0F;
+    BYTE	status = LOBYTE(LOWORD(dwParam));
+    WORD	chn;
     DWORD	ret = MMSYSERR_NOERROR;

if (MIDIMAP_IsBadData(mom))
    return MMSYSERR_ERROR;

+    if (status < 0x80)
+    {
+        if (mom->runningStatus)
+        {
+            status = mom->runningStatus;
+            dwParam = ((LOWORD(dwParam) << 8) | status);
+        }
+        else
+        {
+            FIXME("ooch %Ix\n", dwParam);
+            return MMSYSERR_NOERROR;
+        }
+    }
+    chn = status & 0x0F;
+
     if (!mom->ChannelMap[chn]) return MMSYSERR_NOERROR;

-    switch (lb & 0xF0)
+    switch (status & 0xF0)
     {
     case 0x80:
     case 0x90:
@@ -423,6 +441,7 @@ static DWORD modData(MIDIMAPDATA* mom, DWORD_PTR dwParam)
        }
        ret = midiOutShortMsg(mom->ChannelMap[chn]->hMidi, dwParam);
    }
+	mom->runningStatus = status;
    break;
     case 0xF0:
    for (chn = 0; chn < 16; chn++)
@@ -430,6 +449,9 @@ static DWORD modData(MIDIMAPDATA* mom, DWORD_PTR dwParam)
        if (mom->ChannelMap[chn]->loaded > 0)
    	ret = midiOutShortMsg(mom->ChannelMap[chn]->hMidi, dwParam);
    }
+	/* system common message */
+	if (status <= 0xF7)
+	    mom->runningStatus = 0;
    break;
     default:
    FIXME("ooch %lx\n", dwParam);
@@ -511,6 +533,8 @@ static	DWORD	modReset(MIDIMAPDATA* mom)
        if (ret != MMSYSERR_NOERROR) break;
    }
     }
+    mom->runningStatus = 0;
+
     return ret;
 }