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MIDI: enable transmission of SysEx messages [R. Belmont]

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This commit is contained in:
R. Belmont 2013-02-03 20:39:03 +00:00
parent ceda07b5b7
commit 944baeb5aa
1 changed files with 38 additions and 13 deletions
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51
src/osd/portmedia/pmmidi.c
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@ -12,6 +12,9 @@
static const int RX_EVENT_BUF_SIZE = 512;
#define MIDI_SYSEX 0xf0
#define MIDI_EOX 0xf7
struct osd_midi_device
{
#ifndef DISABLE_MIDI
@ -242,21 +245,46 @@ void osd_write_midi_channel(osd_midi_device *dev, UINT8 data)
{
#ifndef DISABLE_MIDI
int bytes_needed = 0;
PmEvent ev;
ev.timestamp = 0; // use the current time
// skip sysex data
if (dev->last_status == 0xf0)
// handle sysex
if (dev->last_status == MIDI_SYSEX)
{
if (data != 0xf7)
// printf("sysex: %02x (%d)\n", data, dev->xmit_cnt);
// if we get a status that isn't sysex, assume it's system common
if ((data & 0x80) && (data != MIDI_EOX))
{
// printf("common during sysex!\n");
ev.message = Pm_Message(data, 0, 0);
Pm_Write(dev->pmStream, &ev, 1);
return;
}
else
dev->xmit_in[dev->xmit_cnt++] = data;
// if EOX or 4 bytes filled, transmit 4 bytes
if ((dev->xmit_cnt == 4) || (data == MIDI_EOX))
{
dev->last_status = 0xf7;
return;
ev.message = dev->xmit_in[0] | (dev->xmit_in[1]<<8) | (dev->xmit_in[2]<<16) | (dev->xmit_in[3]<<24);
Pm_Write(dev->pmStream, &ev, 1);
dev->xmit_in[0] = dev->xmit_in[1] = dev->xmit_in[2] = dev->xmit_in[3] = 0;
dev->xmit_cnt = 0;
// printf("SysEx packet: %08x\n", ev.message);
// if this is EOX, kill the running status
if (data == MIDI_EOX)
{
dev->last_status = 0;
}
}
return;
}
// handle running status
if ((dev->xmit_cnt == 0) && (data & 0x80))
{
dev->last_status = data;
@ -272,10 +300,10 @@ void osd_write_midi_channel(osd_midi_device *dev, UINT8 data)
dev->xmit_in[dev->xmit_cnt++] = data;
}
if ((dev->xmit_cnt == 1) && (dev->xmit_in[0] == 0xf0))
if ((dev->xmit_cnt == 1) && (dev->xmit_in[0] == MIDI_SYSEX))
{
dev->xmit_cnt = 0;
dev->last_status = 0xf0;
// printf("Start SysEx!\n");
dev->last_status = MIDI_SYSEX;
return;
}
@ -290,8 +318,7 @@ void osd_write_midi_channel(osd_midi_device *dev, UINT8 data)
case 0xf: // system common
switch (dev->xmit_in[0] & 0xf)
{
case 0: // System Exclusive
printf("No SEx please!\n");
case 0: // System Exclusive is handled above
break;
case 7: // End of System Exclusive
@ -316,9 +343,7 @@ void osd_write_midi_channel(osd_midi_device *dev, UINT8 data)
if (dev->xmit_cnt == bytes_needed)
{
PmEvent ev;
ev.message = Pm_Message(dev->xmit_in[0], dev->xmit_in[1], dev->xmit_in[2]);
ev.timestamp = 0; // use the current time
Pm_Write(dev->pmStream, &ev, 1);
dev->xmit_cnt = 0;
}