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MIDI: preliminary SysEx reception support [R. Belmont]

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R. Belmont 2013-02-03 21:26:37 +00:00
parent 7731ec7923
commit 70a9d274ac
1 changed files with 79 additions and 36 deletions
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115
src/osd/portmedia/pmmidi.c
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@ -24,6 +24,7 @@ struct osd_midi_device
UINT8 xmit_in[4]; // Pm_Messages mean we can at most have 3 residue bytes
int xmit_cnt;
UINT8 last_status;
bool rx_sysex;
};
void osd_list_midi_devices(void)
@ -192,46 +193,88 @@ int osd_read_midi_channel(osd_midi_device *dev, UINT8 *pOut)
for (int msg = 0; msg < msgsRead; msg++)
{
UINT8 status = Pm_MessageStatus(dev->rx_evBuf[msg].message);
switch ((status>>4) & 0xf)
if (dev->rx_sysex)
{
case 0xc: // 2-byte messages
case 0xd:
*pOut++ = status;
*pOut++ = Pm_MessageData1(dev->rx_evBuf[msg].message);
bytesOut += 2;
break;
case 0xf: // system common
switch (status & 0xf)
if (status & 0x80) // sys real-time imposing on us?
{
if ((status == 0xf2) || (status == 0xf3))
{
case 0: // System Exclusive
printf("No SEx please!\n");
break;
case 7: // End of System Exclusive
*pOut++ = status;
bytesOut += 1;
break;
case 2: // song pos
case 3: // song select
*pOut++ = status;
*pOut++ = Pm_MessageData1(dev->rx_evBuf[msg].message);
*pOut++ = Pm_MessageData2(dev->rx_evBuf[msg].message);
bytesOut += 3;
break;
default: // all other defined Fx messages are 1 byte
break;
*pOut++ = status;
*pOut++ = Pm_MessageData1(dev->rx_evBuf[msg].message);
*pOut++ = Pm_MessageData2(dev->rx_evBuf[msg].message);
bytesOut += 3;
}
break;
else
{
*pOut++ = status;
bytesOut++;
}
}
else // shift out the sysex bytes
{
for (int i = 0; i < 4; i++)
{
UINT8 byte = dev->rx_evBuf[msg].message & 0xff;
*pOut++ = byte;
bytesOut++;
if (byte == MIDI_EOX)
{
dev->rx_sysex = false;
break;
}
dev->rx_evBuf[msg].message >>= 8;
}
}
}
else
{
switch ((status>>4) & 0xf)
{
case 0xc: // 2-byte messages
case 0xd:
*pOut++ = status;
*pOut++ = Pm_MessageData1(dev->rx_evBuf[msg].message);
bytesOut += 2;
break;
default:
*pOut++ = status;
*pOut++ = Pm_MessageData1(dev->rx_evBuf[msg].message);
*pOut++ = Pm_MessageData2(dev->rx_evBuf[msg].message);
bytesOut += 3;
break;
case 0xf: // system common
switch (status & 0xf)
{
case 0: // System Exclusive
*pOut++ = status; // this should be OK: the shortest legal sysex is F0 tt dd F7, I believe
*pOut++ = (dev->rx_evBuf[msg].message>>8) & 0xff;
*pOut++ = (dev->rx_evBuf[msg].message>>16) & 0xff;
*pOut++ = (dev->rx_evBuf[msg].message>>24) & 0xff;
bytesOut += 4;
dev->rx_sysex = true;
break;
case 7: // End of System Exclusive
*pOut++ = status;
bytesOut += 1;
break;
case 2: // song pos
case 3: // song select
*pOut++ = status;
*pOut++ = Pm_MessageData1(dev->rx_evBuf[msg].message);
*pOut++ = Pm_MessageData2(dev->rx_evBuf[msg].message);
bytesOut += 3;
break;
default: // all other defined Fx messages are 1 byte
break;
}
break;
default:
*pOut++ = status;
*pOut++ = Pm_MessageData1(dev->rx_evBuf[msg].message);
*pOut++ = Pm_MessageData2(dev->rx_evBuf[msg].message);
bytesOut += 3;
break;
}
}
}