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simplified swallowing of SysEx messages and unwanted data bytes. Reordered 

2004-06-19  Michael Natterer  <mitch@gimp.org>

	* modules/controller_midi.c (midi_read_event): simplified
	swallowing of SysEx messages and unwanted data bytes. Reordered
	and commented stuff to be more readable.
This commit is contained in:
Michael Natterer 2004-06-19 18:34:14 +00:00 committed by Michael Natterer
parent a3c08b8d92
commit c4558d8e1c
2 changed files with 58 additions and 43 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2004-06-19 Michael Natterer <mitch@gimp.org>
* modules/controller_midi.c (midi_read_event): simplified
swallowing of SysEx messages and unwanted data bytes. Reordered
and commented stuff to be more readable.
2004-06-19 Michael Natterer <mitch@gimp.org>
* modules/Makefile.am

95
modules/controller_midi.c
View File

@ -409,43 +409,41 @@ midi_read_event (GIOChannel *io,
{
if (buf[pos] >= 0xf8) /* realtime messages */
{
/* nop */
switch (buf[pos])
{
case 0xf8: /* timing clock */
case 0xf9: /* (undefined) */
case 0xfa: /* start */
case 0xfb: /* continue */
case 0xfc: /* stop */
case 0xfd: /* (undefined) */
case 0xfe: /* active sensing */
case 0xff: /* system reset */
/* nop */
#if 0
g_print ("MIDI: realtime message (%02x)\n", buf[pos]);
g_print ("MIDI: realtime message (%02x)\n", buf[pos]);
#endif
}
else if (buf[pos] >= 0xf0) /* system messages */
{
if (buf[pos] == 0xf0) /* sysex start */
{
midi->swallow = TRUE;
D (g_print ("MIDI: sysex start\n"));
break;
}
else
{
midi->swallow = FALSE; /* any status bytes ends swallowing */
}
else
{
midi->swallow = FALSE; /* any status bytes ends swallowing */
if (buf[pos] >= 0xf0) /* system messages */
{
switch (buf[pos])
{
case 0xf7: /* sysex end */
D (g_print ("MIDI: sysex end\n"));
case 0xf0: /* sysex start */
midi->swallow = TRUE;
D (g_print ("MIDI: sysex start\n"));
break;
case 0xf6: /* tune request */
D (g_print ("MIDI: tune request\n"));
break;
case 0xf1: /* time code */
midi->swallow = TRUE; /* type + data */
case 0xf5: /* undefined */
case 0xf4: /* undefined */
D (g_print ("MIDI: undefined system message\n"));
break;
case 0xf3: /* song select */
midi->swallow = TRUE; /* song number */
D (g_print ("MIDI: song select\n"));
D (g_print ("MIDI: time code\n"));
break;
case 0xf2: /* song position */
@ -454,26 +452,37 @@ midi_read_event (GIOChannel *io,
D (g_print ("MIDI: song position\n"));
break;
case 0xf1: /* time code */
midi->swallow = TRUE; /* type + data */
case 0xf3: /* song select */
midi->swallow = TRUE; /* song number */
D (g_print ("MIDI: time code\n"));
D (g_print ("MIDI: song select\n"));
break;
case 0xf4: /* (undefined) */
case 0xf5: /* (undefined) */
D (g_print ("MIDI: undefined system message\n"));
break;
case 0xf6: /* tune request */
D (g_print ("MIDI: tune request\n"));
break;
case 0xf7: /* sysex end */
D (g_print ("MIDI: sysex end\n"));
break;
}
}
}
else /* channel messages */
{
midi->swallow = FALSE; /* any status byte ends swallowing */
else /* channel messages */
{
midi->command = buf[pos] >> 4;
midi->channel = buf[pos] & 0xf;
midi->command = buf[pos] >> 4;
midi->channel = buf[pos] & 0xf;
/* reset running status */
midi->key = -1;
midi->velocity = -1;
midi->msb = -1;
midi->lsb = -1;
/* reset running status */
midi->key = -1;
midi->velocity = -1;
midi->msb = -1;
midi->lsb = -1;
}
}
pos++; /* status byte consumed */