713 lines
15 KiB
C
Executable File
713 lines
15 KiB
C
Executable File
/*
|
|
* sound/oss/midi_synth.c
|
|
*
|
|
* High level midi sequencer manager for dumb MIDI interfaces.
|
|
*/
|
|
/*
|
|
* Copyright (C) by Hannu Savolainen 1993-1997
|
|
*
|
|
* OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
|
|
* Version 2 (June 1991). See the "COPYING" file distributed with this software
|
|
* for more info.
|
|
*/
|
|
/*
|
|
* Thomas Sailer : ioctl code reworked (vmalloc/vfree removed)
|
|
* Andrew Veliath : fixed running status in MIDI input state machine
|
|
*/
|
|
#define USE_SEQ_MACROS
|
|
#define USE_SIMPLE_MACROS
|
|
|
|
#include "sound_config.h"
|
|
|
|
#define _MIDI_SYNTH_C_
|
|
|
|
#include "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];
|
|
|
|
#define STORE(cmd) \
|
|
{ \
|
|
int len; \
|
|
unsigned char obuf[8]; \
|
|
cmd; \
|
|
seq_input_event(obuf, len); \
|
|
}
|
|
|
|
#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:
|
|
/* printk( "MPU: Unknown midi channel message %02x\n", msg[0]); */
|
|
;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(do_midi_msg);
|
|
|
|
static void
|
|
midi_outc(int midi_dev, int data)
|
|
{
|
|
int timeout;
|
|
|
|
for (timeout = 0; timeout < 3200; timeout++)
|
|
if (midi_devs[midi_dev]->outputc(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.
|
|
*/
|
|
printk("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 || midi_devs[orig_dev] == NULL)
|
|
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) {
|
|
/* Data byte (use running status) */
|
|
inc->m_ptr = 2;
|
|
inc->m_buf[1] = data;
|
|
inc->m_buf[0] = inc->m_prev_status;
|
|
inc->m_left = len_tab[(inc->m_buf[0] >> 4) - 8] - 1;
|
|
if (inc->m_left > 0)
|
|
inc->m_state = MST_DATA; /* Not done yet */
|
|
else {
|
|
inc->m_state = MST_INIT;
|
|
do_midi_msg(dev, inc->m_buf, inc->m_ptr);
|
|
inc->m_ptr = 0;
|
|
}
|
|
}
|
|
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:
|
|
printk("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]->outputc(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, void __user *arg)
|
|
{
|
|
/*
|
|
* int orig_dev = synth_devs[dev]->midi_dev;
|
|
*/
|
|
|
|
switch (cmd) {
|
|
|
|
case SNDCTL_SYNTH_INFO:
|
|
if (__copy_to_user(arg, synth_devs[dev]->info, sizeof(struct synth_info)))
|
|
return -EFAULT;
|
|
return 0;
|
|
|
|
case SNDCTL_SYNTH_MEMAVL:
|
|
return 0x7fffffff;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(midi_synth_ioctl);
|
|
|
|
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;
|
|
if (velocity < 0)
|
|
velocity = 0;
|
|
if (velocity > 127)
|
|
velocity = 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;
|
|
}
|
|
EXPORT_SYMBOL(midi_synth_kill_note);
|
|
|
|
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)
|
|
instr_no = 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;
|
|
}
|
|
EXPORT_SYMBOL(midi_synth_set_instr);
|
|
|
|
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;
|
|
if (velocity < 0)
|
|
velocity = 0;
|
|
if (velocity > 127)
|
|
velocity = 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;
|
|
}
|
|
EXPORT_SYMBOL(midi_synth_start_note);
|
|
|
|
void
|
|
midi_synth_reset(int dev)
|
|
{
|
|
|
|
leave_sysex(dev);
|
|
}
|
|
EXPORT_SYMBOL(midi_synth_reset);
|
|
|
|
int
|
|
midi_synth_open(int dev, int mode)
|
|
{
|
|
int orig_dev = synth_devs[dev]->midi_dev;
|
|
int err;
|
|
struct midi_input_info *inc;
|
|
|
|
if (orig_dev < 0 || orig_dev >= num_midis || midi_devs[orig_dev] == NULL)
|
|
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;
|
|
|
|
/* save_flags(flags);
|
|
cli();
|
|
don't know against what irqhandler to protect*/
|
|
inc->m_busy = 0;
|
|
inc->m_state = MST_INIT;
|
|
inc->m_ptr = 0;
|
|
inc->m_left = 0;
|
|
inc->m_prev_status = 0x00;
|
|
/* restore_flags(flags); */
|
|
|
|
return 1;
|
|
}
|
|
EXPORT_SYMBOL(midi_synth_open);
|
|
|
|
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]->outputc(orig_dev, 0xfe);
|
|
|
|
midi_devs[orig_dev]->close(orig_dev);
|
|
}
|
|
EXPORT_SYMBOL(midi_synth_close);
|
|
|
|
void
|
|
midi_synth_hw_control(int dev, unsigned char *event)
|
|
{
|
|
}
|
|
EXPORT_SYMBOL(midi_synth_hw_control);
|
|
|
|
int
|
|
midi_synth_load_patch(int dev, int format, const char __user *addr,
|
|
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 = (unsigned long) &sysex.data[0] - (unsigned long) &sysex;
|
|
|
|
leave_sysex(dev);
|
|
|
|
if (!prefix_cmd(orig_dev, 0xf0))
|
|
return 0;
|
|
|
|
/* Invalid patch format */
|
|
if (format != SYSEX_PATCH)
|
|
return -EINVAL;
|
|
|
|
/* Patch header too short */
|
|
if (count < hdr_size)
|
|
return -EINVAL;
|
|
|
|
count -= hdr_size;
|
|
|
|
/*
|
|
* Copy the header from user space
|
|
*/
|
|
|
|
if (copy_from_user(&sysex, addr, hdr_size))
|
|
return -EFAULT;
|
|
|
|
/* Sysex record too short */
|
|
if ((unsigned)count < (unsigned)sysex.len)
|
|
sysex.len = count;
|
|
|
|
left = sysex.len;
|
|
src_offs = 0;
|
|
|
|
for (i = 0; i < left && !signal_pending(current); i++)
|
|
{
|
|
unsigned char data;
|
|
|
|
if (get_user(data,
|
|
(unsigned char __user *)(addr + hdr_size + i)))
|
|
return -EFAULT;
|
|
|
|
eox_seen = (i > 0 && data & 0x80); /* End of sysex */
|
|
|
|
if (eox_seen && data != 0xf7)
|
|
data = 0xf7;
|
|
|
|
if (i == 0)
|
|
{
|
|
if (data != 0xf0)
|
|
{
|
|
printk(KERN_WARNING "midi_synth: Sysex start missing\n");
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
while (!midi_devs[orig_dev]->outputc(orig_dev, (unsigned char) (data & 0xff)) &&
|
|
!signal_pending(current))
|
|
schedule();
|
|
|
|
if (!first_byte && data & 0x80)
|
|
return 0;
|
|
first_byte = 0;
|
|
}
|
|
|
|
if (!eox_seen)
|
|
midi_outc(orig_dev, 0xf7);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(midi_synth_load_patch);
|
|
|
|
void midi_synth_panning(int dev, int channel, int pressure)
|
|
{
|
|
}
|
|
EXPORT_SYMBOL(midi_synth_panning);
|
|
|
|
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);
|
|
}
|
|
EXPORT_SYMBOL(midi_synth_aftertouch);
|
|
|
|
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 < 0 || ctrl_num > 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 != 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);
|
|
}
|
|
EXPORT_SYMBOL(midi_synth_controller);
|
|
|
|
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);
|
|
}
|
|
EXPORT_SYMBOL(midi_synth_bender);
|
|
|
|
void
|
|
midi_synth_setup_voice(int dev, int voice, int channel)
|
|
{
|
|
}
|
|
EXPORT_SYMBOL(midi_synth_setup_voice);
|
|
|
|
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]->outputc(orig_dev, bytes[i]))
|
|
{
|
|
/*
|
|
* Hardware level buffer is full. Abort the sysex message.
|
|
*/
|
|
|
|
int timeout = 0;
|
|
|
|
bytes[i] = 0xf7;
|
|
sysex_state[dev] = 0;
|
|
|
|
while (!midi_devs[orig_dev]->outputc(orig_dev, bytes[i]) &&
|
|
timeout < 1000)
|
|
timeout++;
|
|
}
|
|
if (!sysex_state[dev])
|
|
return 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(midi_synth_send_sysex);
|
|
|