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freebsd/sys/i386/isa/sound/midi_synth.c
Peter Wemm a0f70ac053 Part 2 of pcvt/voxware revival. I hope I have not clobbered any other 
deltas, but it is possible since I had a few merge conflicts over the last
few days while this has been sitting ready to go.

(Part 1 was committed to the config files, but cvs aborted grrr..)

Approved by:    core
1999-01-01 08:18:13 +00:00

676 lines
15 KiB
C
Raw Blame History

/*
* sound/midi_synth.c
*
* High level midi sequencer manager for dumb MIDI interfaces.
*
* Copyright by Hannu Savolainen 1993
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer. 2.
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#define USE_SEQ_MACROS
#define USE_SIMPLE_MACROS
#include <stddef.h>
#include <i386/isa/sound/sound_config.h>
#if defined(CONFIGURE_SOUNDCARD) /* && defined(CONFIG_MIDI) */
#define _MIDI_SYNTH_C_
static int *sysex_sleeper = NULL;
static volatile struct snd_wait sysex_sleep_flag = {0};
#include <i386/isa/sound/midi_synth.h>
static int midi2synth[MAX_MIDI_DEV];
static int sysex_state[MAX_MIDI_DEV] =
{0};
static unsigned char prev_out_status[MAX_MIDI_DEV];
#ifndef CONFIG_SEQUENCER
#define STORE(cmd)
#else
#define STORE(cmd) { \
int len; \
unsigned char obuf[8]; \
cmd; \
seq_input_event(obuf, len); \
}
#endif
#define _seqbuf obuf
#define _seqbufptr 0
#define _SEQ_ADVBUF(x) len=x
void
do_midi_msg(int synthno, unsigned char *msg, int mlen)
{
switch (msg[0] & 0xf0) {
case 0x90:
if (msg[2] != 0) {
STORE(SEQ_START_NOTE(synthno, msg[0] & 0x0f, msg[1], msg[2]));
break;
}
msg[2] = 64;
case 0x80:
STORE(SEQ_STOP_NOTE(synthno, msg[0] & 0x0f, msg[1], msg[2]));
break;
case 0xA0:
STORE(SEQ_KEY_PRESSURE(synthno, msg[0] & 0x0f, msg[1], msg[2]));
break;
case 0xB0:
STORE(SEQ_CONTROL(synthno, msg[0] & 0x0f, msg[1], msg[2]));
break;
case 0xC0:
STORE(SEQ_SET_PATCH(synthno, msg[0] & 0x0f, msg[1]));
break;
case 0xD0:
STORE(SEQ_CHN_PRESSURE(synthno, msg[0] & 0x0f, msg[1]));
break;
case 0xE0:
STORE(SEQ_BENDER(synthno, msg[0] & 0x0f,
(msg[1] % 0x7f) | ((msg[2] & 0x7f) << 7)));
break;
default:
/*
* printf ("MPU: Unknown midi channel message %02x\n",
* msg[0]);
*/
;
}
}
static void
midi_outc(int midi_dev, int data)
{
int timeout;
for (timeout = 0; timeout < 32000; timeout++)
if (midi_devs[midi_dev]->putc(midi_dev, (unsigned char) (data & 0xff))) {
if (data & 0x80) /* Status byte */
prev_out_status[midi_dev] =
(unsigned char) (data & 0xff); /* Store for running
* status */
return; /* Mission complete */
}
/*
* Sorry! No space on buffers.
*/
printf("Midi send timed out\n");
}
static int
prefix_cmd(int midi_dev, unsigned char status)
{
if ((char *) midi_devs[midi_dev]->prefix_cmd == NULL)
return 1;
return midi_devs[midi_dev]->prefix_cmd(midi_dev, status);
}
static void
midi_synth_input(int orig_dev, unsigned char data)
{
int dev;
struct midi_input_info *inc;
static unsigned char len_tab[] = /* # of data bytes following a status */
{
2, /* 8x */
2, /* 9x */
2, /* Ax */
2, /* Bx */
1, /* Cx */
1, /* Dx */
2, /* Ex */
0 /* Fx */
};
if (orig_dev < 0 || orig_dev > num_midis)
return;
if (data == 0xfe) /* Ignore active sensing */
return;
dev = midi2synth[orig_dev];
inc = &midi_devs[orig_dev]->in_info;
switch (inc->m_state) {
case MST_INIT:
if (data & 0x80) { /* MIDI status byte */
if ((data & 0xf0) == 0xf0) { /* Common message */
switch (data) {
case 0xf0: /* Sysex */
inc->m_state = MST_SYSEX;
break; /* Sysex */
case 0xf1: /* MTC quarter frame */
case 0xf3: /* Song select */
inc->m_state = MST_DATA;
inc->m_ptr = 1;
inc->m_left = 1;
inc->m_buf[0] = data;
break;
case 0xf2: /* Song position pointer */
inc->m_state = MST_DATA;
inc->m_ptr = 1;
inc->m_left = 2;
inc->m_buf[0] = data;
break;
default:
inc->m_buf[0] = data;
inc->m_ptr = 1;
do_midi_msg(dev, inc->m_buf, inc->m_ptr);
inc->m_ptr = 0;
inc->m_left = 0;
}
} else {
inc->m_state = MST_DATA;
inc->m_ptr = 1;
inc->m_left = len_tab[(data >> 4) - 8];
inc->m_buf[0] = inc->m_prev_status = data;
}
} else if (inc->m_prev_status & 0x80) { /* Ignore if no previous
* status (yet) *//* Data byte (use running status) */
inc->m_state = MST_DATA;
inc->m_ptr = 2;
inc->m_left = len_tab[(data >> 4) - 8] - 1;
inc->m_buf[0] = inc->m_prev_status;
inc->m_buf[1] = data;
}
break; /* MST_INIT */
case MST_DATA:
inc->m_buf[inc->m_ptr++] = data;
if (--inc->m_left <= 0) {
inc->m_state = MST_INIT;
do_midi_msg(dev, inc->m_buf, inc->m_ptr);
inc->m_ptr = 0;
}
break; /* MST_DATA */
case MST_SYSEX:
if (data == 0xf7) { /* Sysex end */
inc->m_state = MST_INIT;
inc->m_left = 0;
inc->m_ptr = 0;
}
break; /* MST_SYSEX */
default:
printf("MIDI%d: Unexpected state %d (%02x)\n", orig_dev, inc->m_state,
(int) data);
inc->m_state = MST_INIT;
}
}
static void
leave_sysex(int dev)
{
int orig_dev = synth_devs[dev]->midi_dev;
int timeout = 0;
if (!sysex_state[dev])
return;
sysex_state[dev] = 0;
while (!midi_devs[orig_dev]->putc(orig_dev, 0xf7) && timeout < 1000)
timeout++;
sysex_state[dev] = 0;
}
static void
midi_synth_output(int dev)
{
/*
* Currently NOP
*/
}
int
midi_synth_ioctl(int dev, unsigned int cmd, ioctl_arg arg)
{
/*
* int orig_dev = synth_devs[dev]->midi_dev;
*/
switch (cmd) {
case SNDCTL_SYNTH_INFO:
bcopy(synth_devs[dev]->info, &(((char *) arg)[0]), sizeof(struct synth_info));
return 0;
break;
case SNDCTL_SYNTH_MEMAVL:
return 0x7fffffff;
break;
default:
return -(EINVAL);
}
}
int
midi_synth_kill_note(int dev, int channel, int note, int velocity)
{
int orig_dev = synth_devs[dev]->midi_dev;
int msg, chn;
if (note < 0 || note > 127)
return 0;
if (channel < 0 || channel > 15)
return 0;
RANGE (velocity, 0, 127 ) ;
leave_sysex(dev);
msg = prev_out_status[orig_dev] & 0xf0;
chn = prev_out_status[orig_dev] & 0x0f;
if (chn == channel && ((msg == 0x90 && velocity == 64) || msg == 0x80)) { /* Use running status */
if (!prefix_cmd(orig_dev, note))
return 0;
midi_outc(orig_dev, note);
if (msg == 0x90)/* Running status = Note on */
midi_outc(orig_dev, 0); /* Note on with velocity 0 == note off */
else
midi_outc(orig_dev, velocity);
} else {
if (velocity == 64) {
if (!prefix_cmd(orig_dev, 0x90 | (channel & 0x0f)))
return 0;
midi_outc(orig_dev, 0x90 | (channel & 0x0f)); /* Note on */
midi_outc(orig_dev, note);
midi_outc(orig_dev, 0); /* Zero G */
} else {
if (!prefix_cmd(orig_dev, 0x80 | (channel & 0x0f)))
return 0;
midi_outc(orig_dev, 0x80 | (channel & 0x0f)); /* Note off */
midi_outc(orig_dev, note);
midi_outc(orig_dev, velocity);
}
}
return 0;
}
int
midi_synth_set_instr(int dev, int channel, int instr_no)
{
int orig_dev = synth_devs[dev]->midi_dev;
if (instr_no < 0 || instr_no > 127)
return 0;
if (channel < 0 || channel > 15)
return 0;
leave_sysex(dev);
if (!prefix_cmd(orig_dev, 0xc0 | (channel & 0x0f)))
return 0;
midi_outc(orig_dev, 0xc0 | (channel & 0x0f)); /* Program change */
midi_outc(orig_dev, instr_no);
return 0;
}
int
midi_synth_start_note(int dev, int channel, int note, int velocity)
{
int orig_dev = synth_devs[dev]->midi_dev;
int msg, chn;
if (note < 0 || note > 127)
return 0;
if (channel < 0 || channel > 15)
return 0;
RANGE (velocity, 0, 127 );
leave_sysex(dev);
msg = prev_out_status[orig_dev] & 0xf0;
chn = prev_out_status[orig_dev] & 0x0f;
if (chn == channel && msg == 0x90) { /* Use running status */
if (!prefix_cmd(orig_dev, note))
return 0;
midi_outc(orig_dev, note);
midi_outc(orig_dev, velocity);
} else {
if (!prefix_cmd(orig_dev, 0x90 | (channel & 0x0f)))
return 0;
midi_outc(orig_dev, 0x90 | (channel & 0x0f)); /* Note on */
midi_outc(orig_dev, note);
midi_outc(orig_dev, velocity);
}
return 0;
}
void
midi_synth_reset(int dev)
{
leave_sysex(dev);
}
int
midi_synth_open(int dev, int mode)
{
int orig_dev = synth_devs[dev]->midi_dev;
int err;
unsigned long flags;
struct midi_input_info *inc;
if (orig_dev < 0 || orig_dev > num_midis)
return -(ENXIO);
midi2synth[orig_dev] = dev;
sysex_state[dev] = 0;
prev_out_status[orig_dev] = 0;
if ((err = midi_devs[orig_dev]->open(orig_dev, mode,
midi_synth_input, midi_synth_output)) < 0)
return err;
inc = &midi_devs[orig_dev]->in_info;
flags = splhigh();
inc->m_busy = 0;
inc->m_state = MST_INIT;
inc->m_ptr = 0;
inc->m_left = 0;
inc->m_prev_status = 0x00;
splx(flags);
sysex_sleep_flag.aborting = 0;
sysex_sleep_flag.mode = WK_NONE;
return 1;
}
void
midi_synth_close(int dev)
{
int orig_dev = synth_devs[dev]->midi_dev;
leave_sysex(dev);
/*
* Shut up the synths by sending just single active sensing message.
*/
midi_devs[orig_dev]->putc(orig_dev, 0xfe);
midi_devs[orig_dev]->close(orig_dev);
}
void
midi_synth_hw_control(int dev, unsigned char *event)
{
}
int
midi_synth_load_patch(int dev, int format, snd_rw_buf * addr,
int offs, int count, int pmgr_flag)
{
int orig_dev = synth_devs[dev]->midi_dev;
struct sysex_info sysex;
int i;
unsigned long left, src_offs, eox_seen = 0;
int first_byte = 1;
int hdr_size = offsetof(struct sysex_info, data);
leave_sysex(dev);
if (!prefix_cmd(orig_dev, 0xf0))
return 0;
if (format != SYSEX_PATCH) {
printf("MIDI Error: Invalid patch format (key) 0x%x\n", format);
return -(EINVAL);
}
if (count < hdr_size) {
printf("MIDI Error: Patch header too short\n");
return -(EINVAL);
}
count -= hdr_size;
/*
* Copy the header from user space but ignore the first bytes which
* have been transferred already.
*/
if (uiomove(&((char *) &sysex)[offs], hdr_size - offs, addr)) {
printf("sb: Bad copyin()!\n");
};
if (count < sysex.len) {
printf("MIDI Warning: Sysex record too short (%d<%d)\n",
count, (int) sysex.len);
sysex.len = count;
}
left = sysex.len;
src_offs = 0;
sysex_sleep_flag.aborting = 0;
sysex_sleep_flag.mode = WK_NONE;
for (i = 0; i < left && !(sysex_sleep_flag.aborting); i++) {
unsigned char data;
uiomove((char *) &(data), 1, addr);
eox_seen = (i > 0 && data & 0x80); /* End of sysex */
if (eox_seen && data != 0xf7)
data = 0xf7;
if (i == 0) {
if (data != 0xf0) {
printf("Error: Sysex start missing\n");
return -(EINVAL);
}
}
while (!midi_devs[orig_dev]->putc(orig_dev,
(unsigned char) (data & 0xff)) &&
!(sysex_sleep_flag.aborting)) {
int chn;
sysex_sleeper = &chn;
DO_SLEEP(chn, sysex_sleep_flag, 1);
}; /* Wait for timeout */
if (!first_byte && data & 0x80)
return 0;
first_byte = 0;
}
if (!eox_seen)
midi_outc(orig_dev, 0xf7);
return 0;
}
void
midi_synth_panning(int dev, int channel, int pressure)
{
}
void
midi_synth_aftertouch(int dev, int channel, int pressure)
{
int orig_dev = synth_devs[dev]->midi_dev;
int msg, chn;
if (pressure < 0 || pressure > 127)
return;
if (channel < 0 || channel > 15)
return;
leave_sysex(dev);
msg = prev_out_status[orig_dev] & 0xf0;
chn = prev_out_status[orig_dev] & 0x0f;
if (msg != 0xd0 || chn != channel) { /* Test for running status */
if (!prefix_cmd(orig_dev, 0xd0 | (channel & 0x0f)))
return;
midi_outc(orig_dev, 0xd0 | (channel & 0x0f)); /* Channel pressure */
} else if (!prefix_cmd(orig_dev, pressure))
return;
midi_outc(orig_dev, pressure);
}
void
midi_synth_controller(int dev, int channel, int ctrl_num, int value)
{
int orig_dev = synth_devs[dev]->midi_dev;
int chn, msg;
if (ctrl_num < 1 || ctrl_num > 127)
return; /* NOTE! Controller # 0 ignored */
if (channel < 0 || channel > 15)
return;
leave_sysex(dev);
msg = prev_out_status[orig_dev] & 0xf0;
chn = prev_out_status[orig_dev] & 0x0f;
if (msg != 0xb0 || chn != channel) {
if (!prefix_cmd(orig_dev, 0xb0 | (channel & 0x0f)))
return;
midi_outc(orig_dev, 0xb0 | (channel & 0x0f));
} else if (!prefix_cmd(orig_dev, ctrl_num))
return;
midi_outc(orig_dev, ctrl_num);
midi_outc(orig_dev, value & 0x7f);
}
int
midi_synth_patchmgr(int dev, struct patmgr_info * rec)
{
return -(EINVAL);
}
void
midi_synth_bender(int dev, int channel, int value)
{
int orig_dev = synth_devs[dev]->midi_dev;
int msg, prev_chn;
if (channel < 0 || channel > 15)
return;
if (value < 0 || value > 16383)
return;
leave_sysex(dev);
msg = prev_out_status[orig_dev] & 0xf0;
prev_chn = prev_out_status[orig_dev] & 0x0f;
if (msg != 0xd0 || prev_chn != channel) { /* Test for running status */
if (!prefix_cmd(orig_dev, 0xe0 | (channel & 0x0f)))
return;
midi_outc(orig_dev, 0xe0 | (channel & 0x0f));
} else if (!prefix_cmd(orig_dev, value & 0x7f))
return;
midi_outc(orig_dev, value & 0x7f);
midi_outc(orig_dev, (value >> 7) & 0x7f);
}
void
midi_synth_setup_voice(int dev, int voice, int channel)
{
}
int
midi_synth_send_sysex(int dev, unsigned char *bytes, int len)
{
int orig_dev = synth_devs[dev]->midi_dev;
int i;
for (i = 0; i < len; i++) {
switch (bytes[i]) {
case 0xf0: /* Start sysex */
if (!prefix_cmd(orig_dev, 0xf0))
return 0;
sysex_state[dev] = 1;
break;
case 0xf7: /* End sysex */
if (!sysex_state[dev]) /* Orphan sysex end */
return 0;
sysex_state[dev] = 0;
break;
default:
if (!sysex_state[dev])
return 0;
if (bytes[i] & 0x80) { /* Error. Another message before sysex end */
bytes[i] = 0xf7; /* Sysex end */
sysex_state[dev] = 0;
}
}
if (!midi_devs[orig_dev]->putc(orig_dev, bytes[i])) {
/*
* Hardware leve buffer is full. Abort the sysex message.
*/
int timeout = 0;
bytes[i] = 0xf7;
sysex_state[dev] = 0;
while (!midi_devs[orig_dev]->putc(orig_dev, bytes[i]) &&
timeout < 1000)
timeout++;
}
if (!sysex_state[dev])
return 0;
}
return 0;
}
#endif
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