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winealsa.drv: Handle midi sysex greater than a buffer.

This commit is contained in:
Christian Costa 2008-12-18 21:22:32 +01:00 committed by Alexandre Julliard
parent 2afc8fcd5a
commit 96291a4b0d
1 changed files with 17 additions and 10 deletions
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27
dlls/winealsa.drv/midi.c
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@ -374,27 +374,34 @@ static DWORD WINAPI midRecThread(LPVOID arg)
break;
case SND_SEQ_EVENT_SYSEX:
{
int pos = 0;
int len = ev->data.ext.len;
LPBYTE ptr = (BYTE*) ev->data.ext.ptr;
LPMIDIHDR lpMidiHdr;
/* FIXME: Should handle sysex greater than lpMidiHdr->dwBufferLength */
EnterCriticalSection(&crit_sect);
if ((lpMidiHdr = MidiInDev[wDevID].lpQueueHdr) != NULL) {
if (lpMidiHdr->dwBytesRecorded + len <= lpMidiHdr->dwBufferLength) {
memcpy(lpMidiHdr->lpData + lpMidiHdr->dwBytesRecorded, ptr, len);
lpMidiHdr->dwBytesRecorded += len;
if (*(ptr + (len-1)) == 0xF7) {
while (len) {
if ((lpMidiHdr = MidiInDev[wDevID].lpQueueHdr) != NULL) {
int copylen = min(len, lpMidiHdr->dwBufferLength - lpMidiHdr->dwBytesRecorded);
memcpy(lpMidiHdr->lpData + lpMidiHdr->dwBytesRecorded, ptr + pos, copylen);
lpMidiHdr->dwBytesRecorded += copylen;
len -= copylen;
pos += copylen;
/* We check if we reach the end of buffer or the end of sysex before notifying
* to handle the case where ALSA splitted the sysex into several events */
if ((lpMidiHdr->dwBytesRecorded == lpMidiHdr->dwBufferLength) ||
(*(BYTE*)(lpMidiHdr->lpData + lpMidiHdr->dwBytesRecorded - 1) == 0xF7)) {
lpMidiHdr->dwFlags &= ~MHDR_INQUEUE;
lpMidiHdr->dwFlags |= MHDR_DONE;
MidiInDev[wDevID].lpQueueHdr = (LPMIDIHDR)lpMidiHdr->lpNext;
if (MIDI_NotifyClient(wDevID, MIM_LONGDATA, (DWORD_PTR)lpMidiHdr, dwTime) != MMSYSERR_NOERROR)
WARN("Couldn't notify client\n");
}
} else
FIXME("No enough space in the buffer to store sysex!\n");
} else
FIXME("Sysex received but no buffer to store it!\n");
} else {
FIXME("Sysex data received but no buffer to store it!\n");
break;
}
}
LeaveCriticalSection(&crit_sect);
}
break;