// SPDX-License-Identifier: GPL-2.0-or-later /* * ALSA sequencer event conversion between UMP and legacy clients */ #include #include #include #include #include #include #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); }