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linux-stable/sound/core/seq/seq_ump_convert.c

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* ALSA sequencer event conversion between UMP and legacy clients
*/
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <sound/core.h>
#include <sound/ump.h>
#include <sound/ump_msg.h>
#include "seq_ump_convert.h"
/*
* Upgrade / downgrade value bits
*/
static u8 downscale_32_to_7bit(u32 src)
{
return src >> 25;
}
static u16 downscale_32_to_14bit(u32 src)
{
return src >> 18;
}
static u8 downscale_16_to_7bit(u16 src)
{
return src >> 9;
}
static u16 upscale_7_to_16bit(u8 src)
{
u16 val, repeat;
val = (u16)src << 9;
if (src <= 0x40)
return val;
repeat = src & 0x3f;
return val | (repeat << 3) | (repeat >> 3);
}
static u32 upscale_7_to_32bit(u8 src)
{
u32 val, repeat;
val = src << 25;
if (src <= 0x40)
return val;
repeat = src & 0x3f;
return val | (repeat << 19) | (repeat << 13) |
(repeat << 7) | (repeat << 1) | (repeat >> 5);
}
static u32 upscale_14_to_32bit(u16 src)
{
u32 val, repeat;
val = src << 18;
if (src <= 0x2000)
return val;
repeat = src & 0x1fff;
return val | (repeat << 5) | (repeat >> 8);
}
static unsigned char get_ump_group(struct snd_seq_client_port *port)
{
return port->ump_group ? (port->ump_group - 1) : 0;
}
/* create a UMP header */
#define make_raw_ump(port, type) \
ump_compose(type, get_ump_group(port), 0, 0)
/*
* UMP -> MIDI1 sequencer event
*/
/* MIDI 1.0 CVM */
/* encode note event */
static void ump_midi1_to_note_ev(const union snd_ump_midi1_msg *val,
struct snd_seq_event *ev)
{
ev->data.note.channel = val->note.channel;
ev->data.note.note = val->note.note;
ev->data.note.velocity = val->note.velocity;
}
/* encode one parameter controls */
static void ump_midi1_to_ctrl_ev(const union snd_ump_midi1_msg *val,
struct snd_seq_event *ev)
{
ev->data.control.channel = val->caf.channel;
ev->data.control.value = val->caf.data;
}
/* encode pitch wheel change */
static void ump_midi1_to_pitchbend_ev(const union snd_ump_midi1_msg *val,
struct snd_seq_event *ev)
{
ev->data.control.channel = val->pb.channel;
ev->data.control.value = (val->pb.data_msb << 7) | val->pb.data_lsb;
ev->data.control.value -= 8192;
}
/* encode midi control change */
static void ump_midi1_to_cc_ev(const union snd_ump_midi1_msg *val,
struct snd_seq_event *ev)
{
ev->data.control.channel = val->cc.channel;
ev->data.control.param = val->cc.index;
ev->data.control.value = val->cc.data;
}
/* Encoding MIDI 1.0 UMP packet */
struct seq_ump_midi1_to_ev {
int seq_type;
void (*encode)(const union snd_ump_midi1_msg *val, struct snd_seq_event *ev);
};
/* Encoders for MIDI1 status 0x80-0xe0 */
static struct seq_ump_midi1_to_ev midi1_msg_encoders[] = {
{SNDRV_SEQ_EVENT_NOTEOFF, ump_midi1_to_note_ev}, /* 0x80 */
{SNDRV_SEQ_EVENT_NOTEON, ump_midi1_to_note_ev}, /* 0x90 */
{SNDRV_SEQ_EVENT_KEYPRESS, ump_midi1_to_note_ev}, /* 0xa0 */
{SNDRV_SEQ_EVENT_CONTROLLER, ump_midi1_to_cc_ev}, /* 0xb0 */
{SNDRV_SEQ_EVENT_PGMCHANGE, ump_midi1_to_ctrl_ev}, /* 0xc0 */
{SNDRV_SEQ_EVENT_CHANPRESS, ump_midi1_to_ctrl_ev}, /* 0xd0 */
{SNDRV_SEQ_EVENT_PITCHBEND, ump_midi1_to_pitchbend_ev}, /* 0xe0 */
};
static int cvt_ump_midi1_to_event(const union snd_ump_midi1_msg *val,
struct snd_seq_event *ev)
{
unsigned char status = val->note.status;
if (status < 0x8 || status > 0xe)
return 0; /* invalid - skip */
status -= 8;
ev->type = midi1_msg_encoders[status].seq_type;
ev->flags = SNDRV_SEQ_EVENT_LENGTH_FIXED;
midi1_msg_encoders[status].encode(val, ev);
return 1;
}
/* MIDI System message */
/* encode one parameter value*/
static void ump_system_to_one_param_ev(const union snd_ump_midi1_msg *val,
struct snd_seq_event *ev)
{
ev->data.control.value = val->system.parm1;
}
/* encode song position */
static void ump_system_to_songpos_ev(const union snd_ump_midi1_msg *val,
struct snd_seq_event *ev)
{
ev->data.control.value = (val->system.parm1 << 7) | val->system.parm2;
}
/* Encoders for 0xf0 - 0xff */
static struct seq_ump_midi1_to_ev system_msg_encoders[] = {
{SNDRV_SEQ_EVENT_NONE, NULL}, /* 0xf0 */
{SNDRV_SEQ_EVENT_QFRAME, ump_system_to_one_param_ev}, /* 0xf1 */
{SNDRV_SEQ_EVENT_SONGPOS, ump_system_to_songpos_ev}, /* 0xf2 */
{SNDRV_SEQ_EVENT_SONGSEL, ump_system_to_one_param_ev}, /* 0xf3 */
{SNDRV_SEQ_EVENT_NONE, NULL}, /* 0xf4 */
{SNDRV_SEQ_EVENT_NONE, NULL}, /* 0xf5 */
{SNDRV_SEQ_EVENT_TUNE_REQUEST, NULL}, /* 0xf6 */
{SNDRV_SEQ_EVENT_NONE, NULL}, /* 0xf7 */
{SNDRV_SEQ_EVENT_CLOCK, NULL}, /* 0xf8 */
{SNDRV_SEQ_EVENT_NONE, NULL}, /* 0xf9 */
{SNDRV_SEQ_EVENT_START, NULL}, /* 0xfa */
{SNDRV_SEQ_EVENT_CONTINUE, NULL}, /* 0xfb */
{SNDRV_SEQ_EVENT_STOP, NULL}, /* 0xfc */
{SNDRV_SEQ_EVENT_NONE, NULL}, /* 0xfd */
{SNDRV_SEQ_EVENT_SENSING, NULL}, /* 0xfe */
{SNDRV_SEQ_EVENT_RESET, NULL}, /* 0xff */
};
static int cvt_ump_system_to_event(const union snd_ump_midi1_msg *val,
struct snd_seq_event *ev)
{
unsigned char status = val->system.status;
if ((status & 0xf0) != UMP_MIDI1_MSG_REALTIME)
return 0; /* invalid status - skip */
status &= 0x0f;
ev->type = system_msg_encoders[status].seq_type;
ev->flags = SNDRV_SEQ_EVENT_LENGTH_FIXED;
if (ev->type == SNDRV_SEQ_EVENT_NONE)
return 0;
if (system_msg_encoders[status].encode)
system_msg_encoders[status].encode(val, ev);
return 1;
}
/* MIDI 2.0 CVM */
/* encode note event */
static int ump_midi2_to_note_ev(const union snd_ump_midi2_msg *val,
struct snd_seq_event *ev)
{
ev->data.note.channel = val->note.channel;
ev->data.note.note = val->note.note;
ev->data.note.velocity = downscale_16_to_7bit(val->note.velocity);
/* correct note-on velocity 0 to 1;
* it's no longer equivalent as not-off for MIDI 2.0
*/
if (ev->type == SNDRV_SEQ_EVENT_NOTEON &&
!ev->data.note.velocity)
ev->data.note.velocity = 1;
return 1;
}
/* encode pitch wheel change */
static int ump_midi2_to_pitchbend_ev(const union snd_ump_midi2_msg *val,
struct snd_seq_event *ev)
{
ev->data.control.channel = val->pb.channel;
ev->data.control.value = downscale_32_to_14bit(val->pb.data);
ev->data.control.value -= 8192;
return 1;
}
/* encode midi control change */
static int ump_midi2_to_cc_ev(const union snd_ump_midi2_msg *val,
struct snd_seq_event *ev)
{
ev->data.control.channel = val->cc.channel;
ev->data.control.param = val->cc.index;
ev->data.control.value = downscale_32_to_7bit(val->cc.data);
return 1;
}
/* encode midi program change */
static int ump_midi2_to_pgm_ev(const union snd_ump_midi2_msg *val,
struct snd_seq_event *ev)
{
int size = 1;
ev->data.control.channel = val->pg.channel;
if (val->pg.bank_valid) {
ev->type = SNDRV_SEQ_EVENT_CONTROL14;
ev->data.control.param = UMP_CC_BANK_SELECT;
ev->data.control.value = (val->pg.bank_msb << 7) | val->pg.bank_lsb;
ev[1] = ev[0];
ev++;
ev->type = SNDRV_SEQ_EVENT_PGMCHANGE;
size = 2;
}
ev->data.control.value = val->pg.program;
return size;
}
/* encode one parameter controls */
static int ump_midi2_to_ctrl_ev(const union snd_ump_midi2_msg *val,
struct snd_seq_event *ev)
{
ev->data.control.channel = val->caf.channel;
ev->data.control.value = downscale_32_to_7bit(val->caf.data);
return 1;
}
/* encode RPN/NRPN */
static int ump_midi2_to_rpn_ev(const union snd_ump_midi2_msg *val,
struct snd_seq_event *ev)
{
ev->data.control.channel = val->rpn.channel;
ev->data.control.param = (val->rpn.bank << 7) | val->rpn.index;
ev->data.control.value = downscale_32_to_14bit(val->rpn.data);
return 1;
}
/* Encoding MIDI 2.0 UMP Packet */
struct seq_ump_midi2_to_ev {
int seq_type;
int (*encode)(const union snd_ump_midi2_msg *val, struct snd_seq_event *ev);
};
/* Encoders for MIDI2 status 0x00-0xf0 */
static struct seq_ump_midi2_to_ev midi2_msg_encoders[] = {
{SNDRV_SEQ_EVENT_NONE, NULL}, /* 0x00 */
{SNDRV_SEQ_EVENT_NONE, NULL}, /* 0x10 */
{SNDRV_SEQ_EVENT_REGPARAM, ump_midi2_to_rpn_ev}, /* 0x20 */
{SNDRV_SEQ_EVENT_NONREGPARAM, ump_midi2_to_rpn_ev}, /* 0x30 */
{SNDRV_SEQ_EVENT_NONE, NULL}, /* 0x40 */
{SNDRV_SEQ_EVENT_NONE, NULL}, /* 0x50 */
{SNDRV_SEQ_EVENT_NONE, NULL}, /* 0x60 */
{SNDRV_SEQ_EVENT_NONE, NULL}, /* 0x70 */
{SNDRV_SEQ_EVENT_NOTEOFF, ump_midi2_to_note_ev}, /* 0x80 */
{SNDRV_SEQ_EVENT_NOTEON, ump_midi2_to_note_ev}, /* 0x90 */
{SNDRV_SEQ_EVENT_KEYPRESS, ump_midi2_to_note_ev}, /* 0xa0 */
{SNDRV_SEQ_EVENT_CONTROLLER, ump_midi2_to_cc_ev}, /* 0xb0 */
{SNDRV_SEQ_EVENT_PGMCHANGE, ump_midi2_to_pgm_ev}, /* 0xc0 */
{SNDRV_SEQ_EVENT_CHANPRESS, ump_midi2_to_ctrl_ev}, /* 0xd0 */
{SNDRV_SEQ_EVENT_PITCHBEND, ump_midi2_to_pitchbend_ev}, /* 0xe0 */
{SNDRV_SEQ_EVENT_NONE, NULL}, /* 0xf0 */
};
static int cvt_ump_midi2_to_event(const union snd_ump_midi2_msg *val,
struct snd_seq_event *ev)
{
unsigned char status = val->note.status;
ev->type = midi2_msg_encoders[status].seq_type;
if (ev->type == SNDRV_SEQ_EVENT_NONE)
return 0; /* skip */
ev->flags = SNDRV_SEQ_EVENT_LENGTH_FIXED;
return midi2_msg_encoders[status].encode(val, ev);
}
/* parse and compose for a sysex var-length event */
static int cvt_ump_sysex7_to_event(const u32 *data, unsigned char *buf,
struct snd_seq_event *ev)
{
unsigned char status;
unsigned char bytes;
u32 val;
int size = 0;
val = data[0];
status = ump_sysex_message_status(val);
bytes = ump_sysex_message_length(val);
if (bytes > 6)
return 0; // skip
if (status == UMP_SYSEX_STATUS_SINGLE ||
status == UMP_SYSEX_STATUS_START) {
buf[0] = UMP_MIDI1_MSG_SYSEX_START;
size = 1;
}
if (bytes > 0)
buf[size++] = (val >> 8) & 0x7f;
if (bytes > 1)
buf[size++] = val & 0x7f;
val = data[1];
if (bytes > 2)
buf[size++] = (val >> 24) & 0x7f;
if (bytes > 3)
buf[size++] = (val >> 16) & 0x7f;
if (bytes > 4)
buf[size++] = (val >> 8) & 0x7f;
if (bytes > 5)
buf[size++] = val & 0x7f;
if (status == UMP_SYSEX_STATUS_SINGLE ||
status == UMP_SYSEX_STATUS_END)
buf[size++] = UMP_MIDI1_MSG_SYSEX_END;
ev->type = SNDRV_SEQ_EVENT_SYSEX;
ev->flags = SNDRV_SEQ_EVENT_LENGTH_VARIABLE;
ev->data.ext.len = size;
ev->data.ext.ptr = buf;
return 1;
}
/* convert UMP packet from MIDI 1.0 to MIDI 2.0 and deliver it */
static int cvt_ump_midi1_to_midi2(struct snd_seq_client *dest,
struct snd_seq_client_port *dest_port,
struct snd_seq_event *__event,
int atomic, int hop)
{
struct snd_seq_ump_event *event = (struct snd_seq_ump_event *)__event;
struct snd_seq_ump_event ev_cvt;
const union snd_ump_midi1_msg *midi1 = (const union snd_ump_midi1_msg *)event->ump;
union snd_ump_midi2_msg *midi2 = (union snd_ump_midi2_msg *)ev_cvt.ump;
ev_cvt = *event;
memset(&ev_cvt.ump, 0, sizeof(ev_cvt.ump));
midi2->note.type = UMP_MSG_TYPE_MIDI2_CHANNEL_VOICE;
midi2->note.group = midi1->note.group;
midi2->note.status = midi1->note.status;
midi2->note.channel = midi1->note.channel;
switch (midi1->note.status) {
case UMP_MSG_STATUS_NOTE_ON:
case UMP_MSG_STATUS_NOTE_OFF:
midi2->note.note = midi1->note.note;
midi2->note.velocity = upscale_7_to_16bit(midi1->note.velocity);
break;
case UMP_MSG_STATUS_POLY_PRESSURE:
midi2->paf.note = midi1->paf.note;
midi2->paf.data = upscale_7_to_32bit(midi1->paf.data);
break;
case UMP_MSG_STATUS_CC:
midi2->cc.index = midi1->cc.index;
midi2->cc.data = upscale_7_to_32bit(midi1->cc.data);
break;
case UMP_MSG_STATUS_PROGRAM:
midi2->pg.program = midi1->pg.program;
break;
case UMP_MSG_STATUS_CHANNEL_PRESSURE:
midi2->caf.data = upscale_7_to_32bit(midi1->caf.data);
break;
case UMP_MSG_STATUS_PITCH_BEND:
midi2->pb.data = upscale_14_to_32bit((midi1->pb.data_msb << 7) |
midi1->pb.data_lsb);
break;
default:
return 0;
}
return __snd_seq_deliver_single_event(dest, dest_port,
(struct snd_seq_event *)&ev_cvt,
atomic, hop);
}
/* convert UMP packet from MIDI 2.0 to MIDI 1.0 and deliver it */
static int cvt_ump_midi2_to_midi1(struct snd_seq_client *dest,
struct snd_seq_client_port *dest_port,
struct snd_seq_event *__event,
int atomic, int hop)
{
struct snd_seq_ump_event *event = (struct snd_seq_ump_event *)__event;
struct snd_seq_ump_event ev_cvt;
union snd_ump_midi1_msg *midi1 = (union snd_ump_midi1_msg *)ev_cvt.ump;
const union snd_ump_midi2_msg *midi2 = (const union snd_ump_midi2_msg *)event->ump;
u16 v;
ev_cvt = *event;
memset(&ev_cvt.ump, 0, sizeof(ev_cvt.ump));
midi1->note.type = UMP_MSG_TYPE_MIDI1_CHANNEL_VOICE;
midi1->note.group = midi2->note.group;
midi1->note.status = midi2->note.status;
midi1->note.channel = midi2->note.channel;
switch (midi2->note.status) {
case UMP_MSG_STATUS_NOTE_ON:
case UMP_MSG_STATUS_NOTE_OFF:
midi1->note.note = midi2->note.note;
midi1->note.velocity = downscale_16_to_7bit(midi2->note.velocity);
break;
case UMP_MSG_STATUS_POLY_PRESSURE:
midi1->paf.note = midi2->paf.note;
midi1->paf.data = downscale_32_to_7bit(midi2->paf.data);
break;
case UMP_MSG_STATUS_CC:
midi1->cc.index = midi2->cc.index;
midi1->cc.data = downscale_32_to_7bit(midi2->cc.data);
break;
case UMP_MSG_STATUS_PROGRAM:
midi1->pg.program = midi2->pg.program;
break;
case UMP_MSG_STATUS_CHANNEL_PRESSURE:
midi1->caf.data = downscale_32_to_7bit(midi2->caf.data);
break;
case UMP_MSG_STATUS_PITCH_BEND:
v = downscale_32_to_14bit(midi2->pb.data);
midi1->pb.data_msb = v >> 7;
midi1->pb.data_lsb = v & 0x7f;
break;
default:
return 0;
}
return __snd_seq_deliver_single_event(dest, dest_port,
(struct snd_seq_event *)&ev_cvt,
atomic, hop);
}
/* convert UMP to a legacy ALSA seq event and deliver it */
static int cvt_ump_to_any(struct snd_seq_client *dest,
struct snd_seq_client_port *dest_port,
struct snd_seq_event *event,
unsigned char type,
int atomic, int hop)
{
struct snd_seq_event ev_cvt[2]; /* up to two events */
struct snd_seq_ump_event *ump_ev = (struct snd_seq_ump_event *)event;
/* use the second event as a temp buffer for saving stack usage */
unsigned char *sysex_buf = (unsigned char *)(ev_cvt + 1);
unsigned char flags = event->flags & ~SNDRV_SEQ_EVENT_UMP;
int i, len, err;
ev_cvt[0] = ev_cvt[1] = *event;
ev_cvt[0].flags = flags;
ev_cvt[1].flags = flags;
switch (type) {
case UMP_MSG_TYPE_SYSTEM:
len = cvt_ump_system_to_event((union snd_ump_midi1_msg *)ump_ev->ump,
ev_cvt);
break;
case UMP_MSG_TYPE_MIDI1_CHANNEL_VOICE:
len = cvt_ump_midi1_to_event((union snd_ump_midi1_msg *)ump_ev->ump,
ev_cvt);
break;
case UMP_MSG_TYPE_MIDI2_CHANNEL_VOICE:
len = cvt_ump_midi2_to_event((union snd_ump_midi2_msg *)ump_ev->ump,
ev_cvt);
break;
case UMP_MSG_TYPE_DATA:
len = cvt_ump_sysex7_to_event(ump_ev->ump, sysex_buf, ev_cvt);
break;
default:
return 0;
}
for (i = 0; i < len; i++) {
err = __snd_seq_deliver_single_event(dest, dest_port,
&ev_cvt[i], atomic, hop);
if (err < 0)
return err;
}
return 0;
}
/* Replace UMP group field with the destination and deliver */
static int deliver_with_group_convert(struct snd_seq_client *dest,
struct snd_seq_client_port *dest_port,
struct snd_seq_ump_event *ump_ev,
int atomic, int hop)
{
struct snd_seq_ump_event ev = *ump_ev;
/* rewrite the group to the destination port */
ev.ump[0] &= ~(0xfU << 24);
/* fill with the new group; the dest_port->ump_group field is 1-based */
ev.ump[0] |= ((dest_port->ump_group - 1) << 24);
return __snd_seq_deliver_single_event(dest, dest_port,
(struct snd_seq_event *)&ev,
atomic, hop);
}
/* apply the UMP event filter; return true to skip the event */
static bool ump_event_filtered(struct snd_seq_client *dest,
const struct snd_seq_ump_event *ev)
{
unsigned char group;
group = ump_message_group(ev->ump[0]);
if (ump_is_groupless_msg(ump_message_type(ev->ump[0])))
return dest->group_filter & (1U << 0);
/* check the bitmap for 1-based group number */
return dest->group_filter & (1U << (group + 1));
}
/* Convert from UMP packet and deliver */
int snd_seq_deliver_from_ump(struct snd_seq_client *source,
struct snd_seq_client *dest,
struct snd_seq_client_port *dest_port,
struct snd_seq_event *event,
int atomic, int hop)
{
struct snd_seq_ump_event *ump_ev = (struct snd_seq_ump_event *)event;
unsigned char type;
if (snd_seq_ev_is_variable(event))
return 0; // skip, no variable event for UMP, so far
if (ump_event_filtered(dest, ump_ev))
return 0; // skip if group filter is set and matching
type = ump_message_type(ump_ev->ump[0]);
if (snd_seq_client_is_ump(dest)) {
if (snd_seq_client_is_midi2(dest) &&
type == UMP_MSG_TYPE_MIDI1_CHANNEL_VOICE)
return cvt_ump_midi1_to_midi2(dest, dest_port,
event, atomic, hop);
else if (!snd_seq_client_is_midi2(dest) &&
type == UMP_MSG_TYPE_MIDI2_CHANNEL_VOICE)
return cvt_ump_midi2_to_midi1(dest, dest_port,
event, atomic, hop);
/* non-EP port and different group is set? */
if (dest_port->ump_group &&
!ump_is_groupless_msg(type) &&
ump_message_group(*ump_ev->ump) + 1 != dest_port->ump_group)
return deliver_with_group_convert(dest, dest_port,
ump_ev, atomic, hop);
/* copy as-is */
return __snd_seq_deliver_single_event(dest, dest_port,
event, atomic, hop);
}
return cvt_ump_to_any(dest, dest_port, event, type, atomic, hop);
}
/*
* MIDI1 sequencer event -> UMP conversion
*/
/* Conversion to UMP MIDI 1.0 */
/* convert note on/off event to MIDI 1.0 UMP */
static int note_ev_to_ump_midi1(const struct snd_seq_event *event,
struct snd_seq_client_port *dest_port,
union snd_ump_midi1_msg *data,
unsigned char status)
{
if (!event->data.note.velocity)
status = UMP_MSG_STATUS_NOTE_OFF;
data->note.status = status;
data->note.channel = event->data.note.channel & 0x0f;
data->note.velocity = event->data.note.velocity & 0x7f;
data->note.note = event->data.note.note & 0x7f;
return 1;
}
/* convert CC event to MIDI 1.0 UMP */
static int cc_ev_to_ump_midi1(const struct snd_seq_event *event,
struct snd_seq_client_port *dest_port,
union snd_ump_midi1_msg *data,
unsigned char status)
{
data->cc.status = status;
data->cc.channel = event->data.control.channel & 0x0f;
data->cc.index = event->data.control.param;
data->cc.data = event->data.control.value;
return 1;
}
/* convert one-parameter control event to MIDI 1.0 UMP */
static int ctrl_ev_to_ump_midi1(const struct snd_seq_event *event,
struct snd_seq_client_port *dest_port,
union snd_ump_midi1_msg *data,
unsigned char status)
{
data->caf.status = status;
data->caf.channel = event->data.control.channel & 0x0f;
data->caf.data = event->data.control.value & 0x7f;
return 1;
}
/* convert pitchbend event to MIDI 1.0 UMP */
static int pitchbend_ev_to_ump_midi1(const struct snd_seq_event *event,
struct snd_seq_client_port *dest_port,
union snd_ump_midi1_msg *data,
unsigned char status)
{
int val = event->data.control.value + 8192;
val = clamp(val, 0, 0x3fff);
data->pb.status = status;
data->pb.channel = event->data.control.channel & 0x0f;
data->pb.data_msb = (val >> 7) & 0x7f;
data->pb.data_lsb = val & 0x7f;
return 1;
}
/* convert 14bit control event to MIDI 1.0 UMP; split to two events */
static int ctrl14_ev_to_ump_midi1(const struct snd_seq_event *event,
struct snd_seq_client_port *dest_port,
union snd_ump_midi1_msg *data,
unsigned char status)
{
data->cc.status = UMP_MSG_STATUS_CC;
data->cc.channel = event->data.control.channel & 0x0f;
data->cc.index = event->data.control.param & 0x7f;
if (event->data.control.param < 0x20) {
data->cc.data = (event->data.control.value >> 7) & 0x7f;
data[1] = data[0];
data[1].cc.index = event->data.control.param | 0x20;
data[1].cc.data = event->data.control.value & 0x7f;
return 2;
}
data->cc.data = event->data.control.value & 0x7f;
return 1;
}
/* convert RPN/NRPN event to MIDI 1.0 UMP; split to four events */
static int rpn_ev_to_ump_midi1(const struct snd_seq_event *event,
struct snd_seq_client_port *dest_port,
union snd_ump_midi1_msg *data,
unsigned char status)
{
bool is_rpn = (status == UMP_MSG_STATUS_RPN);
data->cc.status = UMP_MSG_STATUS_CC;
data->cc.channel = event->data.control.channel & 0x0f;
data[1] = data[2] = data[3] = data[0];
data[0].cc.index = is_rpn ? UMP_CC_RPN_MSB : UMP_CC_NRPN_MSB;
data[0].cc.data = (event->data.control.param >> 7) & 0x7f;
data[1].cc.index = is_rpn ? UMP_CC_RPN_LSB : UMP_CC_NRPN_LSB;
data[1].cc.data = event->data.control.param & 0x7f;
data[2].cc.index = UMP_CC_DATA;
data[2].cc.data = (event->data.control.value >> 7) & 0x7f;
data[3].cc.index = UMP_CC_DATA_LSB;
data[3].cc.data = event->data.control.value & 0x7f;
return 4;
}
/* convert system / RT message to UMP */
static int system_ev_to_ump_midi1(const struct snd_seq_event *event,
struct snd_seq_client_port *dest_port,
union snd_ump_midi1_msg *data,
unsigned char status)
{
data->system.status = status;
return 1;
}
/* convert system / RT message with 1 parameter to UMP */
static int system_1p_ev_to_ump_midi1(const struct snd_seq_event *event,
struct snd_seq_client_port *dest_port,
union snd_ump_midi1_msg *data,
unsigned char status)
{
data->system.status = status;
data->system.parm1 = event->data.control.value & 0x7f;
return 1;
}
/* convert system / RT message with two parameters to UMP */
static int system_2p_ev_to_ump_midi1(const struct snd_seq_event *event,
struct snd_seq_client_port *dest_port,
union snd_ump_midi1_msg *data,
unsigned char status)
{
data->system.status = status;
data->system.parm1 = (event->data.control.value >> 7) & 0x7f;
data->system.parm2 = event->data.control.value & 0x7f;
return 1;
}
/* Conversion to UMP MIDI 2.0 */
/* convert note on/off event to MIDI 2.0 UMP */
static int note_ev_to_ump_midi2(const struct snd_seq_event *event,
struct snd_seq_client_port *dest_port,
union snd_ump_midi2_msg *data,
unsigned char status)
{
if (!event->data.note.velocity)
status = UMP_MSG_STATUS_NOTE_OFF;
data->note.status = status;
data->note.channel = event->data.note.channel & 0x0f;
data->note.note = event->data.note.note & 0x7f;
data->note.velocity = upscale_7_to_16bit(event->data.note.velocity & 0x7f);
return 1;
}
/* convert PAF event to MIDI 2.0 UMP */
static int paf_ev_to_ump_midi2(const struct snd_seq_event *event,
struct snd_seq_client_port *dest_port,
union snd_ump_midi2_msg *data,
unsigned char status)
{
data->paf.status = status;
data->paf.channel = event->data.note.channel & 0x0f;
data->paf.note = event->data.note.note & 0x7f;
data->paf.data = upscale_7_to_32bit(event->data.note.velocity & 0x7f);
return 1;
}
/* set up the MIDI2 RPN/NRPN packet data from the parsed info */
static void fill_rpn(struct snd_seq_ump_midi2_bank *cc,
union snd_ump_midi2_msg *data)
{
if (cc->rpn_set) {
data->rpn.status = UMP_MSG_STATUS_RPN;
data->rpn.bank = cc->cc_rpn_msb;
data->rpn.index = cc->cc_rpn_lsb;
cc->rpn_set = 0;
cc->cc_rpn_msb = cc->cc_rpn_lsb = 0;
} else {
data->rpn.status = UMP_MSG_STATUS_NRPN;
data->rpn.bank = cc->cc_nrpn_msb;
data->rpn.index = cc->cc_nrpn_lsb;
cc->nrpn_set = 0;
cc->cc_nrpn_msb = cc->cc_nrpn_lsb = 0;
}
data->rpn.data = upscale_14_to_32bit((cc->cc_data_msb << 7) |
cc->cc_data_lsb);
cc->cc_data_msb = cc->cc_data_lsb = 0;
}
/* convert CC event to MIDI 2.0 UMP */
static int cc_ev_to_ump_midi2(const struct snd_seq_event *event,
struct snd_seq_client_port *dest_port,
union snd_ump_midi2_msg *data,
unsigned char status)
{
unsigned char channel = event->data.control.channel & 0x0f;
unsigned char index = event->data.control.param & 0x7f;
unsigned char val = event->data.control.value & 0x7f;
struct snd_seq_ump_midi2_bank *cc = &dest_port->midi2_bank[channel];
/* process special CC's (bank/rpn/nrpn) */
switch (index) {
case UMP_CC_RPN_MSB:
cc->rpn_set = 1;
cc->cc_rpn_msb = val;
return 0; // skip
case UMP_CC_RPN_LSB:
cc->rpn_set = 1;
cc->cc_rpn_lsb = val;
return 0; // skip
case UMP_CC_NRPN_MSB:
cc->nrpn_set = 1;
cc->cc_nrpn_msb = val;
return 0; // skip
case UMP_CC_NRPN_LSB:
cc->nrpn_set = 1;
cc->cc_nrpn_lsb = val;
return 0; // skip
case UMP_CC_DATA:
cc->cc_data_msb = val;
return 0; // skip
case UMP_CC_BANK_SELECT:
cc->bank_set = 1;
cc->cc_bank_msb = val;
return 0; // skip
case UMP_CC_BANK_SELECT_LSB:
cc->bank_set = 1;
cc->cc_bank_lsb = val;
return 0; // skip
case UMP_CC_DATA_LSB:
cc->cc_data_lsb = val;
if (!(cc->rpn_set || cc->nrpn_set))
return 0; // skip
fill_rpn(cc, data);
return 1;
}
data->cc.status = status;
data->cc.channel = channel;
data->cc.index = index;
data->cc.data = upscale_7_to_32bit(event->data.control.value & 0x7f);
return 1;
}
/* convert one-parameter control event to MIDI 2.0 UMP */
static int ctrl_ev_to_ump_midi2(const struct snd_seq_event *event,
struct snd_seq_client_port *dest_port,
union snd_ump_midi2_msg *data,
unsigned char status)
{
data->caf.status = status;
data->caf.channel = event->data.control.channel & 0x0f;
data->caf.data = upscale_7_to_32bit(event->data.control.value & 0x7f);
return 1;
}
/* convert program change event to MIDI 2.0 UMP */
static int pgm_ev_to_ump_midi2(const struct snd_seq_event *event,
struct snd_seq_client_port *dest_port,
union snd_ump_midi2_msg *data,
unsigned char status)
{
unsigned char channel = event->data.control.channel & 0x0f;
struct snd_seq_ump_midi2_bank *cc = &dest_port->midi2_bank[channel];
data->pg.status = status;
data->pg.channel = channel;
data->pg.program = event->data.control.value & 0x7f;
if (cc->bank_set) {
data->pg.bank_valid = 1;
data->pg.bank_msb = cc->cc_bank_msb;
data->pg.bank_lsb = cc->cc_bank_lsb;
cc->bank_set = 0;
cc->cc_bank_msb = cc->cc_bank_lsb = 0;
}
return 1;
}
/* convert pitchbend event to MIDI 2.0 UMP */
static int pitchbend_ev_to_ump_midi2(const struct snd_seq_event *event,
struct snd_seq_client_port *dest_port,
union snd_ump_midi2_msg *data,
unsigned char status)
{
int val = event->data.control.value + 8192;
val = clamp(val, 0, 0x3fff);
data->pb.status = status;
data->pb.channel = event->data.control.channel & 0x0f;
data->pb.data = upscale_14_to_32bit(val);
return 1;
}
/* convert 14bit control event to MIDI 2.0 UMP; split to two events */
static int ctrl14_ev_to_ump_midi2(const struct snd_seq_event *event,
struct snd_seq_client_port *dest_port,
union snd_ump_midi2_msg *data,
unsigned char status)
{
unsigned char channel = event->data.control.channel & 0x0f;
unsigned char index = event->data.control.param & 0x7f;
struct snd_seq_ump_midi2_bank *cc = &dest_port->midi2_bank[channel];
unsigned char msb, lsb;
msb = (event->data.control.value >> 7) & 0x7f;
lsb = event->data.control.value & 0x7f;
/* process special CC's (bank/rpn/nrpn) */
switch (index) {
case UMP_CC_BANK_SELECT:
cc->cc_bank_msb = msb;
fallthrough;
case UMP_CC_BANK_SELECT_LSB:
cc->bank_set = 1;
cc->cc_bank_lsb = lsb;
return 0; // skip
case UMP_CC_RPN_MSB:
cc->cc_rpn_msb = msb;
fallthrough;
case UMP_CC_RPN_LSB:
cc->rpn_set = 1;
cc->cc_rpn_lsb = lsb;
return 0; // skip
case UMP_CC_NRPN_MSB:
cc->cc_nrpn_msb = msb;
fallthrough;
case UMP_CC_NRPN_LSB:
cc->nrpn_set = 1;
cc->cc_nrpn_lsb = lsb;
return 0; // skip
case UMP_CC_DATA:
cc->cc_data_msb = msb;
fallthrough;
case UMP_CC_DATA_LSB:
cc->cc_data_lsb = lsb;
if (!(cc->rpn_set || cc->nrpn_set))
return 0; // skip
fill_rpn(cc, data);
return 1;
}
data->cc.status = UMP_MSG_STATUS_CC;
data->cc.channel = channel;
data->cc.index = index;
if (event->data.control.param < 0x20) {
data->cc.data = upscale_7_to_32bit(msb);
data[1] = data[0];
data[1].cc.index = event->data.control.param | 0x20;
data[1].cc.data = upscale_7_to_32bit(lsb);
return 2;
}
data->cc.data = upscale_7_to_32bit(lsb);
return 1;
}
/* convert RPN/NRPN event to MIDI 2.0 UMP */
static int rpn_ev_to_ump_midi2(const struct snd_seq_event *event,
struct snd_seq_client_port *dest_port,
union snd_ump_midi2_msg *data,
unsigned char status)
{
data->rpn.status = status;
data->rpn.channel = event->data.control.channel;
data->rpn.bank = (event->data.control.param >> 7) & 0x7f;
data->rpn.index = event->data.control.param & 0x7f;
data->rpn.data = upscale_14_to_32bit(event->data.control.value & 0x3fff);
return 1;
}
/* convert system / RT message to UMP */
static int system_ev_to_ump_midi2(const struct snd_seq_event *event,
struct snd_seq_client_port *dest_port,
union snd_ump_midi2_msg *data,
unsigned char status)
{
return system_ev_to_ump_midi1(event, dest_port,
(union snd_ump_midi1_msg *)data,
status);
}
/* convert system / RT message with 1 parameter to UMP */
static int system_1p_ev_to_ump_midi2(const struct snd_seq_event *event,
struct snd_seq_client_port *dest_port,
union snd_ump_midi2_msg *data,
unsigned char status)
{
return system_1p_ev_to_ump_midi1(event, dest_port,
(union snd_ump_midi1_msg *)data,
status);
}
/* convert system / RT message with two parameters to UMP */
static int system_2p_ev_to_ump_midi2(const struct snd_seq_event *event,
struct snd_seq_client_port *dest_port,
union snd_ump_midi2_msg *data,
unsigned char status)
{
return system_1p_ev_to_ump_midi1(event, dest_port,
(union snd_ump_midi1_msg *)data,
status);
}
struct seq_ev_to_ump {
int seq_type;
unsigned char status;
int (*midi1_encode)(const struct snd_seq_event *event,
struct snd_seq_client_port *dest_port,
union snd_ump_midi1_msg *data,
unsigned char status);
int (*midi2_encode)(const struct snd_seq_event *event,
struct snd_seq_client_port *dest_port,
union snd_ump_midi2_msg *data,
unsigned char status);
};
static const struct seq_ev_to_ump seq_ev_ump_encoders[] = {
{ SNDRV_SEQ_EVENT_NOTEON, UMP_MSG_STATUS_NOTE_ON,
note_ev_to_ump_midi1, note_ev_to_ump_midi2 },
{ SNDRV_SEQ_EVENT_NOTEOFF, UMP_MSG_STATUS_NOTE_OFF,
note_ev_to_ump_midi1, note_ev_to_ump_midi2 },
{ SNDRV_SEQ_EVENT_KEYPRESS, UMP_MSG_STATUS_POLY_PRESSURE,
note_ev_to_ump_midi1, paf_ev_to_ump_midi2 },
{ SNDRV_SEQ_EVENT_CONTROLLER, UMP_MSG_STATUS_CC,
cc_ev_to_ump_midi1, cc_ev_to_ump_midi2 },
{ SNDRV_SEQ_EVENT_PGMCHANGE, UMP_MSG_STATUS_PROGRAM,
ctrl_ev_to_ump_midi1, pgm_ev_to_ump_midi2 },
{ SNDRV_SEQ_EVENT_CHANPRESS, UMP_MSG_STATUS_CHANNEL_PRESSURE,
ctrl_ev_to_ump_midi1, ctrl_ev_to_ump_midi2 },
{ SNDRV_SEQ_EVENT_PITCHBEND, UMP_MSG_STATUS_PITCH_BEND,
pitchbend_ev_to_ump_midi1, pitchbend_ev_to_ump_midi2 },
{ SNDRV_SEQ_EVENT_CONTROL14, 0,
ctrl14_ev_to_ump_midi1, ctrl14_ev_to_ump_midi2 },
{ SNDRV_SEQ_EVENT_NONREGPARAM, UMP_MSG_STATUS_NRPN,
rpn_ev_to_ump_midi1, rpn_ev_to_ump_midi2 },
{ SNDRV_SEQ_EVENT_REGPARAM, UMP_MSG_STATUS_RPN,
rpn_ev_to_ump_midi1, rpn_ev_to_ump_midi2 },
{ SNDRV_SEQ_EVENT_QFRAME, UMP_SYSTEM_STATUS_MIDI_TIME_CODE,
system_1p_ev_to_ump_midi1, system_1p_ev_to_ump_midi2 },
{ SNDRV_SEQ_EVENT_SONGPOS, UMP_SYSTEM_STATUS_SONG_POSITION,
system_2p_ev_to_ump_midi1, system_2p_ev_to_ump_midi2 },
{ SNDRV_SEQ_EVENT_SONGSEL, UMP_SYSTEM_STATUS_SONG_SELECT,
system_1p_ev_to_ump_midi1, system_1p_ev_to_ump_midi2 },
{ SNDRV_SEQ_EVENT_TUNE_REQUEST, UMP_SYSTEM_STATUS_TUNE_REQUEST,
system_ev_to_ump_midi1, system_ev_to_ump_midi2 },
{ SNDRV_SEQ_EVENT_CLOCK, UMP_SYSTEM_STATUS_TIMING_CLOCK,
system_ev_to_ump_midi1, system_ev_to_ump_midi2 },
{ SNDRV_SEQ_EVENT_START, UMP_SYSTEM_STATUS_START,
system_ev_to_ump_midi1, system_ev_to_ump_midi2 },
{ SNDRV_SEQ_EVENT_CONTINUE, UMP_SYSTEM_STATUS_CONTINUE,
system_ev_to_ump_midi1, system_ev_to_ump_midi2 },
{ SNDRV_SEQ_EVENT_STOP, UMP_SYSTEM_STATUS_STOP,
system_ev_to_ump_midi1, system_ev_to_ump_midi2 },
{ SNDRV_SEQ_EVENT_SENSING, UMP_SYSTEM_STATUS_ACTIVE_SENSING,
system_ev_to_ump_midi1, system_ev_to_ump_midi2 },
};
static const struct seq_ev_to_ump *find_ump_encoder(int type)
{
int i;
for (i = 0; i < ARRAY_SIZE(seq_ev_ump_encoders); i++)
if (seq_ev_ump_encoders[i].seq_type == type)
return &seq_ev_ump_encoders[i];
return NULL;
}
static void setup_ump_event(struct snd_seq_ump_event *dest,
const struct snd_seq_event *src)
{
memcpy(dest, src, sizeof(*src));
dest->type = 0;
dest->flags |= SNDRV_SEQ_EVENT_UMP;
dest->flags &= ~SNDRV_SEQ_EVENT_LENGTH_MASK;
memset(dest->ump, 0, sizeof(dest->ump));
}
/* Convert ALSA seq event to UMP MIDI 1.0 and deliver it */
static int cvt_to_ump_midi1(struct snd_seq_client *dest,
struct snd_seq_client_port *dest_port,
struct snd_seq_event *event,
int atomic, int hop)
{
const struct seq_ev_to_ump *encoder;
struct snd_seq_ump_event ev_cvt;
union snd_ump_midi1_msg data[4];
int i, n, err;
encoder = find_ump_encoder(event->type);
if (!encoder)
return __snd_seq_deliver_single_event(dest, dest_port,
event, atomic, hop);
data->raw = make_raw_ump(dest_port, UMP_MSG_TYPE_MIDI1_CHANNEL_VOICE);
n = encoder->midi1_encode(event, dest_port, data, encoder->status);
if (!n)
return 0;
setup_ump_event(&ev_cvt, event);
for (i = 0; i < n; i++) {
ev_cvt.ump[0] = data[i].raw;
err = __snd_seq_deliver_single_event(dest, dest_port,
(struct snd_seq_event *)&ev_cvt,
atomic, hop);
if (err < 0)
return err;
}
return 0;
}
/* Convert ALSA seq event to UMP MIDI 2.0 and deliver it */
static int cvt_to_ump_midi2(struct snd_seq_client *dest,
struct snd_seq_client_port *dest_port,
struct snd_seq_event *event,
int atomic, int hop)
{
const struct seq_ev_to_ump *encoder;
struct snd_seq_ump_event ev_cvt;
union snd_ump_midi2_msg data[2];
int i, n, err;
encoder = find_ump_encoder(event->type);
if (!encoder)
return __snd_seq_deliver_single_event(dest, dest_port,
event, atomic, hop);
data->raw[0] = make_raw_ump(dest_port, UMP_MSG_TYPE_MIDI2_CHANNEL_VOICE);
data->raw[1] = 0;
n = encoder->midi2_encode(event, dest_port, data, encoder->status);
if (!n)
return 0;
setup_ump_event(&ev_cvt, event);
for (i = 0; i < n; i++) {
memcpy(ev_cvt.ump, &data[i], sizeof(data[i]));
err = __snd_seq_deliver_single_event(dest, dest_port,
(struct snd_seq_event *)&ev_cvt,
atomic, hop);
if (err < 0)
return err;
}
return 0;
}
/* Fill up a sysex7 UMP from the byte stream */
static void fill_sysex7_ump(struct snd_seq_client_port *dest_port,
u32 *val, u8 status, u8 *buf, int len)
{
memset(val, 0, 8);
memcpy((u8 *)val + 2, buf, len);
#ifdef __LITTLE_ENDIAN
swab32_array(val, 2);
#endif
val[0] |= ump_compose(UMP_MSG_TYPE_DATA, get_ump_group(dest_port),
status, len);
}
/* Convert sysex var event to UMP sysex7 packets and deliver them */
static int cvt_sysex_to_ump(struct snd_seq_client *dest,
struct snd_seq_client_port *dest_port,
struct snd_seq_event *event,
int atomic, int hop)
{
struct snd_seq_ump_event ev_cvt;
unsigned char status;
u8 buf[6], *xbuf;
int offset = 0;
int len, err;
if (!snd_seq_ev_is_variable(event))
return 0;
setup_ump_event(&ev_cvt, event);
for (;;) {
len = snd_seq_expand_var_event_at(event, sizeof(buf), buf, offset);
if (len <= 0)
break;
if (WARN_ON(len > 6))
break;
offset += len;
xbuf = buf;
if (*xbuf == UMP_MIDI1_MSG_SYSEX_START) {
status = UMP_SYSEX_STATUS_START;
xbuf++;
len--;
if (len > 0 && xbuf[len - 1] == UMP_MIDI1_MSG_SYSEX_END) {
status = UMP_SYSEX_STATUS_SINGLE;
len--;
}
} else {
if (xbuf[len - 1] == UMP_MIDI1_MSG_SYSEX_END) {
status = UMP_SYSEX_STATUS_END;
len--;
} else {
status = UMP_SYSEX_STATUS_CONTINUE;
}
}
fill_sysex7_ump(dest_port, ev_cvt.ump, status, xbuf, len);
err = __snd_seq_deliver_single_event(dest, dest_port,
(struct snd_seq_event *)&ev_cvt,
atomic, hop);
if (err < 0)
return err;
}
return 0;
}
/* Convert to UMP packet and deliver */
int snd_seq_deliver_to_ump(struct snd_seq_client *source,
struct snd_seq_client *dest,
struct snd_seq_client_port *dest_port,
struct snd_seq_event *event,
int atomic, int hop)
{
if (dest->group_filter & (1U << dest_port->ump_group))
return 0; /* group filtered - skip the event */
if (event->type == SNDRV_SEQ_EVENT_SYSEX)
return cvt_sysex_to_ump(dest, dest_port, event, atomic, hop);
else if (snd_seq_client_is_midi2(dest))
return cvt_to_ump_midi2(dest, dest_port, event, atomic, hop);
else
return cvt_to_ump_midi1(dest, dest_port, event, atomic, hop);
}
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