diff mbox series

[alsa-lib,5/8] ump: Add helpers to parse / set UMP packet data

Message ID 20230520070021.1301-6-tiwai@suse.de (mailing list archive)
State Superseded
Headers show
Series Add MIDI 2.0 support | expand

Commit Message

Takashi Iwai May 20, 2023, 7 a.m. UTC
This patch defines the structs / unions that can be used for encoding
and decoding UMP packets, as well as inline helper functions.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 include/Makefile.am     |   2 +-
 include/local.h         |   2 +
 include/ump_msg.h       | 571 ++++++++++++++++++++++++++++++++++++++++
 src/rawmidi/ump_local.h |   1 +
 4 files changed, 575 insertions(+), 1 deletion(-)
 create mode 100644 include/ump_msg.h
diff mbox series

Patch

diff --git a/include/Makefile.am b/include/Makefile.am
index b7f67b250810..16d68b511297 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -34,7 +34,7 @@  endif
 endif
 
 if BUILD_RAWMIDI
-alsainclude_HEADERS += rawmidi.h ump.h
+alsainclude_HEADERS += rawmidi.h ump.h ump_msg.h
 endif
 
 if BUILD_HWDEP
diff --git a/include/local.h b/include/local.h
index 151e3fd4d39b..51042d764f65 100644
--- a/include/local.h
+++ b/include/local.h
@@ -69,9 +69,11 @@ 
 #if __BYTE_ORDER == __LITTLE_ENDIAN
 #define SND_LITTLE_ENDIAN
 #define SNDRV_LITTLE_ENDIAN
+#define SNDRV_LITTLE_ENDIAN_BITFIELD
 #elif __BYTE_ORDER == __BIG_ENDIAN
 #define SND_BIG_ENDIAN
 #define SNDRV_BIG_ENDIAN
+#define SNDRV_BIG_ENDIAN_BITFIELD
 #else
 #error "Unsupported endian..."
 #endif
diff --git a/include/ump_msg.h b/include/ump_msg.h
new file mode 100644
index 000000000000..1b7f70667054
--- /dev/null
+++ b/include/ump_msg.h
@@ -0,0 +1,571 @@ 
+/* SPDX-License-Identifier: LGPL-2.1+ */
+/**
+ * \file include/ump_msg.h
+ * \brief API library for ALSA rawmidi/UMP interface
+ *
+ * API library for ALSA rawmidi/UMP interface
+ */
+
+#ifndef __ALSA_UMP_MSG_H
+#define __ALSA_UMP_MSG_H
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** general UMP packet header in 32bit word */
+typedef struct _snd_ump_msg_hdr {
+#ifdef SNDRV_BIG_ENDIAN_BITFIELD
+	uint8_t type:4;		/**< UMP packet type */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t status:4;	/**< Status */
+	uint8_t channel:4;	/**< Channel */
+	uint8_t byte1;		/**< First data byte */
+	uint8_t byte2;		/**< Second data byte */
+#else
+	uint8_t byte2;		/**< Second data byte */
+	uint8_t byte1;		/**< First data byte */
+	uint8_t channel:4;	/**< Channel */
+	uint8_t status:4;	/**< Status */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t type:4;		/**< UMP packet type */
+#endif
+} __attribute((packed)) snd_ump_msg_hdr_t;
+
+/** MIDI 1.0 Note Off / Note On (32bit) */
+typedef struct _snd_ump_msg_midi1_note {
+#ifdef SNDRV_BIG_ENDIAN_BITFIELD
+	uint8_t type:4;		/**< UMP packet type */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t status:4;	/**< Status */
+	uint8_t channel:4;	/**< Channel */
+	uint8_t note;		/**< Note (7bit) */
+	uint8_t velocity;	/**< Velocity (7bit) */
+#else
+	uint8_t velocity;	/**< Velocity (7bit) */
+	uint8_t note;		/**< Note (7bit) */
+	uint8_t channel:4;	/**< Channel */
+	uint8_t status:4;	/**< Status */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t type:4;		/**< UMP packet type */
+#endif
+} __attribute((packed)) snd_ump_msg_midi1_note_t;
+
+/** MIDI 1.0 Poly Pressure (32bit) */
+typedef struct _snd_ump_msg_midi1_paf {
+#ifdef SNDRV_BIG_ENDIAN_BITFIELD
+	uint8_t type:4;		/**< UMP packet type */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t status:4;	/**< Status */
+	uint8_t channel:4;	/**< Channel */
+	uint8_t note;		/** Note (7bit) */
+	uint8_t data;		/** Pressure (7bit) */
+#else
+	uint8_t data;		/** Pressure (7bit) */
+	uint8_t note;		/** Note (7bit) */
+	uint8_t channel:4;	/**< Channel */
+	uint8_t status:4;	/**< Status */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t type:4;		/**< UMP packet type */
+#endif
+} __attribute((packed)) snd_ump_msg_midi1_paf_t;
+
+/** MIDI 1.0 Control Change (32bit) */
+typedef struct _snd_ump_msg_midi1_cc {
+#ifdef SNDRV_BIG_ENDIAN_BITFIELD
+	uint8_t type:4;		/**< UMP packet type */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t status:4;	/**< Status */
+	uint8_t channel:4;	/**< Channel */
+	uint8_t index;		/** Control index (7bit) */
+	uint8_t data;		/** Control data (7bit) */
+#else
+	uint8_t data;		/** Control data (7bit) */
+	uint8_t index;		/** Control index (7bit) */
+	uint8_t channel:4;	/**< Channel */
+	uint8_t status:4;	/**< Status */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t type:4;		/**< UMP packet type */
+#endif
+} __attribute((packed)) snd_ump_msg_midi1_cc_t;
+
+/** MIDI 1.0 Program Change (32bit) */
+typedef struct _snd_ump_msg_midi1_program {
+#ifdef SNDRV_BIG_ENDIAN_BITFIELD
+	uint8_t type:4;		/**< UMP packet type */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t status:4;	/**< Status */
+	uint8_t channel:4;	/**< Channel */
+	uint8_t program;	/**< Program number (7bit) */
+	uint8_t reserved;	/**< Unused */
+#else
+	uint8_t reserved;	/**< Unused */
+	uint8_t program;	/**< Program number (7bit) */
+	uint8_t channel:4;	/**< Channel */
+	uint8_t status:4;	/**< Status */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t type:4;		/**< UMP packet type */
+#endif
+} __attribute((packed)) snd_ump_msg_midi1_program_t;
+
+/** MIDI 1.0 Channel Pressure (32bit) */
+typedef struct _snd_ump_msg_midi1_caf {
+#ifdef SNDRV_BIG_ENDIAN_BITFIELD
+	uint8_t type:4;		/**< UMP packet type */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t status:4;	/**< Status */
+	uint8_t channel:4;	/**< Channel */
+	uint8_t data;		/**< Pressure (7bit) */
+	uint8_t reserved;	/**< Unused */
+#else
+	uint8_t reserved;	/**< Unused */
+	uint8_t data;		/**< Pressure (7bit) */
+	uint8_t channel:4;	/**< Channel */
+	uint8_t status:4;	/**< Status */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t type:4;		/**< UMP packet type */
+#endif
+} __attribute((packed)) snd_ump_msg_midi1_caf_t;
+
+/** MIDI 1.0 Pitch Bend (32bit) */
+typedef struct _snd_ump_msg_midi1_pitchbend {
+#ifdef SNDRV_BIG_ENDIAN_BITFIELD
+	uint8_t type:4;		/**< UMP packet type */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t status:4;	/**< Status */
+	uint8_t channel:4;	/**< Channel */
+	uint8_t data_lsb;	/**< LSB of pitchbend (7bit) */
+	uint8_t data_msb;	/**< MSB of pitchbend (7bit) */
+#else
+	uint8_t data_msb;	/**< MSB of pitchbend (7bit) */
+	uint8_t data_lsb;	/**< LSB of pitchbend (7bit) */
+	uint8_t channel:4;	/**< Channel */
+	uint8_t status:4;	/**< Status */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t type:4;		/**< UMP packet type */
+#endif
+} __attribute((packed)) snd_ump_msg_midi1_pitchbend_t;
+
+/** System Common and Real Time messages (32bit); no channel field */
+typedef struct snd_ump_msg_system {
+#ifdef SNDRV_BIG_ENDIAN_BITFIELD
+	uint8_t type:4;		/**< UMP packet type */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t status;		/**< Status */
+	uint8_t parm1;		/**< First parameter */
+	uint8_t parm2;		/**< Second parameter */
+#else
+	uint8_t parm1;		/**< First parameter */
+	uint8_t parm2;		/**< Second parameter */
+	uint8_t status;		/**< Status */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t type:4;		/**< UMP packet type */
+#endif
+} __attribute((packed)) snd_ump_msg_system_t;
+
+/** MIDI 1.0 UMP CVM (32bit) */
+typedef union _snd_ump_msg_midi1 {
+	snd_ump_msg_midi1_note_t	note_on;
+	snd_ump_msg_midi1_note_t	note_off;
+	snd_ump_msg_midi1_paf_t		poly_pressure;
+	snd_ump_msg_midi1_cc_t		control_change;
+	snd_ump_msg_midi1_program_t	program_change;
+	snd_ump_msg_midi1_caf_t		channel_pressure;
+	snd_ump_msg_midi1_pitchbend_t	pitchbend;
+	snd_ump_msg_system_t		system;
+	snd_ump_msg_hdr_t		hdr;
+	uint32_t			raw;
+} snd_ump_msg_midi1_t;
+
+/** MIDI 2.0 Note-on/off attribute type */
+enum {
+	SND_UMP_MIDI2_NOTE_ATTR_NO_DATA		= 0x00,	/**< No attribute data */
+	SND_UMP_MIDI2_NOTE_ATTR_MANUFACTURER	= 0x01,	/**< Manufacturer specific */
+	SND_UMP_MIDI2_NOTE_ATTR_PROFILE		= 0x02,	/**< Profile specific */
+	SND_UMP_MIDI2_NOTE_ATTR_PITCH79		= 0x03,	/**< Pitch 7.9 */
+};
+
+/* MIDI 2.0 Note Off / Note On (64bit) */
+typedef struct _snd_ump_msg_midi2_note {
+#ifdef SNDRV_BIG_ENDIAN_BITFIELD
+	uint8_t type:4;		/**< UMP packet type */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t status:4;	/**< Status */
+	uint8_t channel:4;	/**< Channel */
+	uint8_t note;		/**< Note (7bit) */
+	uint8_t attr_type;	/**< Attribute type */
+
+	uint16_t velocity;	/**< Velocity (16bit) */
+	uint16_t attr_data;	/**< Attribute data (16bit) */
+#else
+	uint8_t attr_type;	/**< Attribute type */
+	uint8_t note;		/**< Note (7bit) */
+	uint8_t channel:4;	/**< Channel */
+	uint8_t status:4;	/**< Status */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t type:4;		/**< UMP packet type */
+
+	uint16_t attr_data;	/**< Attribute data (16bit) */
+	uint16_t velocity;	/**< Velocity (16bit) */
+#endif
+} __attribute((packed)) snd_ump_msg_midi2_note_t;
+
+/** MIDI 2.0 Poly Pressure (64bit) */
+typedef struct _snd_ump_msg_midi2_paf {
+#ifdef SNDRV_BIG_ENDIAN_BITFIELD
+	uint8_t type:4;		/**< UMP packet type */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t status:4;	/**< Status */
+	uint8_t channel:4;	/**< Channel */
+	uint8_t note;		/**< Note (7bit) */
+	uint8_t reserved;	/**< Unused */
+
+	uint32_t data;		/**< Pressure (32bit) */
+#else
+	uint8_t reserved;	/**< Unused */
+	uint8_t note;		/**< Note (7bit) */
+	uint8_t channel:4;	/**< Channel */
+	uint8_t status:4;	/**< Status */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t type:4;		/**< UMP packet type */
+
+	uint32_t data;		/**< Pressure (32bit) */
+#endif
+} __attribute((packed)) snd_ump_msg_midi2_paf_t;
+
+/** MIDI 2.0 Per-Note Controller (64bit) */
+typedef struct _snd_ump_msg_midi2_per_note_cc {
+#ifdef SNDRV_BIG_ENDIAN_BITFIELD
+	uint8_t type:4;		/**< UMP packet type */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t status:4;	/**< Status */
+	uint8_t channel:4;	/**< Channel */
+	uint8_t note;		/**< Note (7bit) */
+	uint8_t index;		/**< Control index (8bit) */
+
+	uint32_t data;		/**< Data (32bit) */
+#else
+	uint8_t index;		/**< Control index (8bit) */
+	uint8_t note;		/**< Note (7bit) */
+	uint8_t channel:4;	/**< Channel */
+	uint8_t status:4;	/**< Status */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t type:4;		/**< UMP packet type */
+
+	uint32_t data;		/**< Data (32bit) */
+#endif
+} __attribute((packed)) snd_ump_msg_midi2_per_note_cc_t;
+
+/** MIDI 2.0 per-note management flag bits */
+enum {
+	SND_UMP_MIDI2_PNMGMT_RESET_CONTROLLERS	= 0x01,	/**< Reset (set) per-note controllers */
+	SND_UMP_MIDI2_PNMGMT_DETACH_CONTROLLERS	= 0x02,	/**< Detach per-note controllers */
+};
+
+/** MIDI 2.0 Per-Note Management (64bit) */
+typedef struct _snd_ump_msg_midi2_per_note_mgmt {
+#ifdef SNDRV_BIG_ENDIAN_BITFIELD
+	uint8_t type:4;		/**< UMP packet type */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t status:4;	/**< Status */
+	uint8_t channel:4;	/**< Channel */
+	uint8_t note;		/**< Note (7bit) */
+	uint8_t flags;		/**< Option flags (8bit) */
+
+	uint32_t reserved;	/**< Unused */
+#else
+	uint8_t flags;		/**< Option flags (8bit) */
+	uint8_t note;		/**< Note (7bit) */
+	uint8_t channel:4;	/**< Channel */
+	uint8_t status:4;	/**< Status */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t type:4;		/**< UMP packet type */
+
+	uint32_t reserved;	/**< Unused */
+#endif
+} __attribute((packed)) snd_ump_msg_midi2_per_note_mgmt_t;
+
+/** MIDI 2.0 Control Change (64bit) */
+typedef struct _snd_ump_msg_midi2_cc {
+#ifdef SNDRV_BIG_ENDIAN_BITFIELD
+	uint8_t type:4;		/**< UMP packet type */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t status:4;	/**< Status */
+	uint8_t channel:4;	/**< Channel */
+	uint8_t index;		/**< Control index (7bit) */
+	uint8_t reserved;	/**< Unused */
+
+	uint32_t data;		/**< Control data (32bit) */
+#else
+	uint8_t reserved;	/**< Unused */
+	uint8_t index;		/**< Control index (7bit) */
+	uint8_t channel:4;	/**< Channel */
+	uint8_t status:4;	/**< Status */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t type:4;		/**< UMP packet type */
+
+	uint32_t data;		/**< Control data (32bit) */
+#endif
+} __attribute((packed)) snd_ump_msg_midi2_cc_t;
+
+/** MIDI 2.0 Registered Controller (RPN) / Assignable Controller (NRPN) (64bit) */
+typedef struct _snd_ump_msg_midi2_rpn {
+#ifdef SNDRV_BIG_ENDIAN_BITFIELD
+	uint8_t type:4;		/**< UMP packet type */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t status:4;	/**< Status */
+	uint8_t channel:4;	/**< Channel */
+	uint8_t bank;		/**< Bank number (7bit) */
+	uint8_t index;		/**< Control index (7bit) */
+
+	uint32_t data;		/**< Data (32bit) */
+#else
+	uint8_t index;		/**< Control index (7bit) */
+	uint8_t bank;		/**< Bank number (7bit) */
+	uint8_t channel:4;	/**< Channel */
+	uint8_t status:4;	/**< Status */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t type:4;		/**< UMP packet type */
+
+	uint32_t data;		/**< Data (32bit) */
+#endif
+} __attribute((packed)) snd_ump_msg_midi2_rpn_t;
+
+/** MIDI 2.0 Program Change (64bit) */
+typedef struct _snd_ump_msg_midi2_program {
+#ifdef SNDRV_BIG_ENDIAN_BITFIELD
+	uint8_t type:4;		/**< UMP packet type */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t status:4;	/**< Status */
+	uint8_t channel:4;	/**< Channel */
+	uint16_t reserved:15;	/**< Unused */
+	uint16_t bank_valid:1;	/**< Option flag: bank valid */
+
+	uint8_t program;	/**< Program number (7bit) */
+	uint8_t reserved2;	/**< Unused */
+	uint8_t bank_msb;	/**< MSB of bank (8bit) */
+	uint8_t bank_lsb;	/**< LSB of bank (7bit) */
+#else
+	uint16_t bank_valid:1;	/**< Option flag: bank valid */
+	uint16_t reserved:15;	/**< Unused */
+	uint8_t channel:4;	/**< Channel */
+	uint8_t status:4;	/**< Status */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t type:4;		/**< UMP packet type */
+
+	uint8_t bank_lsb;	/**< LSB of bank (7bit) */
+	uint8_t bank_msb;	/**< MSB of bank (8bit) */
+	uint8_t reserved2;	/**< Unused */
+	uint8_t program;	/**< Program number (7bit) */
+#endif
+} __attribute((packed)) snd_ump_msg_midi2_program_t;
+
+/** MIDI 2.0 Channel Pressure (64bit) */
+typedef struct _snd_ump_msg_midi2_caf {
+#ifdef SNDRV_BIG_ENDIAN_BITFIELD
+	uint8_t type:4;		/**< UMP packet type */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t status:4;	/**< Status */
+	uint8_t channel:4;	/**< Channel */
+	uint16_t reserved;	/**< Unused */
+
+	uint32_t data;		/** Data (32bit) */
+#else
+	uint16_t reserved;	/**< Unused */
+	uint8_t channel:4;	/**< Channel */
+	uint8_t status:4;	/**< Status */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t type:4;		/**< UMP packet type */
+
+	uint32_t data;		/** Data (32bit) */
+#endif
+} __attribute((packed)) snd_ump_msg_midi2_caf_t;
+
+/* MIDI 2.0 Pitch Bend (64bit) */
+typedef struct _snd_ump_msg_midi2_pitchbend {
+#ifdef SNDRV_BIG_ENDIAN_BITFIELD
+	uint8_t type:4;		/**< UMP packet type */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t status:4;	/**< Status */
+	uint8_t channel:4;	/**< Channel */
+	uint16_t reserved;	/**< Unused */
+
+	uint32_t data;		/** Data (32bit) */
+#else
+	uint16_t reserved;	/**< Unused */
+	uint8_t channel:4;	/**< Channel */
+	uint8_t status:4;	/**< Status */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t type:4;		/**< UMP packet type */
+
+	uint32_t data;		/** Data (32bit) */
+#endif
+} __attribute((packed)) snd_ump_msg_midi2_pitchbend_t;
+
+/* MIDI 2.0 Per-Note Pitch Bend (64bit) */
+typedef struct _snd_ump_msg_midi2_per_note_pitchbend {
+#ifdef __BIG_ENDIAN_BITFIELD
+	uint8_t type:4;		/**< UMP packet type */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t status:4;	/**< Status */
+	uint8_t channel:4;	/**< Channel */
+	uint8_t note;		/**< Note (7bit) */
+	uint8_t reserved;	/**< Unused */
+
+	uint32_t data;		/**< Data (32bit) */
+#else
+	/* 0 */
+	uint8_t reserved;	/**< Unused */
+	uint8_t note;		/**< Note (7bit) */
+	uint8_t channel:4;	/**< Channel */
+	uint8_t status:4;	/**< Status */
+	uint8_t group:4;	/**< UMP Group */
+	uint8_t type:4;		/**< UMP packet type */
+
+	uint32_t data;		/**< Data (32bit) */
+#endif
+} __attribute((packed)) snd_ump_msg_midi2_per_note_pitchbend_t;
+
+/** MIDI2 UMP packet (64bit little-endian) */
+typedef union _snd_ump_msg_midi2 {
+	snd_ump_msg_midi2_note_t	note_on;
+	snd_ump_msg_midi2_note_t	note_off;
+	snd_ump_msg_midi2_paf_t		poly_pressure;
+	snd_ump_msg_midi2_per_note_cc_t	per_note_acc;
+	snd_ump_msg_midi2_per_note_cc_t	per_note_rcc;
+	snd_ump_msg_midi2_per_note_mgmt_t per_note_mgmt;
+	snd_ump_msg_midi2_cc_t		control_change;
+	snd_ump_msg_midi2_rpn_t		rpn;
+	snd_ump_msg_midi2_rpn_t		nrpn;
+	snd_ump_msg_midi2_rpn_t		relative_rpn;
+	snd_ump_msg_midi2_rpn_t		relative_nrpn;
+	snd_ump_msg_midi2_program_t	program_change;
+	snd_ump_msg_midi2_caf_t		channel_pressure;
+	snd_ump_msg_midi2_pitchbend_t	pitchbend;
+	snd_ump_msg_midi2_per_note_pitchbend_t per_note_pitchbend;
+	snd_ump_msg_hdr_t		hdr;
+	uint32_t			raw[2];
+} snd_ump_msg_midi2_t;
+
+/**
+ * UMP message type
+ */
+enum {
+	SND_UMP_MSG_TYPE_SYSTEM			= 0x01,	/* System messages */
+	SND_UMP_MSG_TYPE_MIDI1_CHANNEL_VOICE	= 0x02,	/* MIDI 1.0 messages */
+	SND_UMP_MSG_TYPE_DATA			= 0x03,	/* 7bit SysEx messages */
+	SND_UMP_MSG_TYPE_MIDI2_CHANNEL_VOICE	= 0x04,	/* MIDI 2.0 messages */
+	SND_UMP_MSG_TYPE_EXTENDED_DATA		= 0x05,	/* 8bit data message */
+};
+
+/**
+ * UMP MIDI 1.0 / 2.0 message status code (4bit)
+ */
+enum {
+	SND_UMP_MSG_PER_NOTE_RCC	= 0x0,
+	SND_UMP_MSG_PER_NOTE_ACC	= 0x1,
+	SND_UMP_MSG_RPN			= 0x2,
+	SND_UMP_MSG_NRPN		= 0x3,
+	SND_UMP_MSG_RELATIVE_RPN	= 0x4,
+	SND_UMP_MSG_RELATIVE_NRPN	= 0x5,
+	SND_UMP_MSG_PER_NOTE_PITCHBEND	= 0x6,
+	SND_UMP_MSG_NOTE_OFF		= 0x8,
+	SND_UMP_MSG_NOTE_ON		= 0x9,
+	SND_UMP_MSG_POLY_PRESSURE	= 0xa,
+	SND_UMP_MSG_CONTROL_CHANGE	= 0xb,
+	SND_UMP_MSG_PROGRAM_CHANGE	= 0xc,
+	SND_UMP_MSG_CHANNEL_PRESSURE	= 0xd,
+	SND_UMP_MSG_PITCHBEND		= 0xe,
+	SND_UMP_MSG_PER_NOTE_MGMT	= 0xf,
+};
+
+/**
+ * MIDI System / Realtime message status code (8bit)
+ */
+enum {
+	SND_UMP_MSG_REALTIME		= 0xf0, /* mask */
+	SND_UMP_MSG_SYSEX_START		= 0xf0,
+	SND_UMP_MSG_MIDI_TIME_CODE	= 0xf1,
+	SND_UMP_MSG_SONG_POSITION	= 0xf2,
+	SND_UMP_MSG_SONG_SELECT		= 0xf3,
+	SND_UMP_MSG_TUNE_REQUEST	= 0xf6,
+	SND_UMP_MSG_SYSEX_END		= 0xf7,
+	SND_UMP_MSG_TIMING_CLOCK	= 0xf8,
+	SND_UMP_MSG_START		= 0xfa,
+	SND_UMP_MSG_CONTINUE		= 0xfb,
+	SND_UMP_MSG_STOP		= 0xfc,
+	SND_UMP_MSG_ACTIVE_SENSING	= 0xfe,
+	SND_UMP_MSG_RESET		= 0xff,
+};
+
+/**
+ * \brief get UMP status (4bit) from 32bit UMP message header
+ */
+static inline uint8_t snd_ump_msg_hdr_status(uint32_t ump)
+{
+	return (ump >> 20) & 0x0f;
+}
+
+/**
+ * \brief get UMP channel (4bit) from 32bit UMP message header
+ */
+static inline uint8_t snd_ump_msg_hdr_channel(uint32_t ump)
+{
+	return (ump >> 16) & 0x0f;
+}
+
+/**
+ * \brief get UMP message type (4bit) from 32bit UMP message header
+ */
+static inline uint8_t snd_ump_msg_hdr_type(uint32_t ump)
+{
+	return (ump >> 28);
+}
+
+/**
+ * \brief get UMP group (4bit) from 32bit UMP message header
+ */
+static inline uint8_t snd_ump_msg_hdr_group(uint32_t ump)
+{
+	return (ump >> 24) & 0x0f;
+}
+
+/**
+ * \brief get UMP status from UMP packet pointer
+ */
+static inline uint8_t snd_ump_msg_status(const uint32_t *ump)
+{
+	return snd_ump_msg_hdr_status(*ump);
+}
+
+/**
+ * \brief get UMP channel from UMP packet pointer
+ */
+static inline uint8_t snd_ump_msg_channel(const uint32_t *ump)
+{
+	return snd_ump_msg_hdr_channel(*ump);
+}
+
+/**
+ * \brief get UMP message type from UMP packet pointer
+ */
+static inline uint8_t snd_ump_msg_type(const uint32_t *ump)
+{
+	return snd_ump_msg_hdr_type(*ump);
+}
+
+/**
+ * \brief get UMP group from UMP packet pointer
+ */
+static inline uint8_t snd_ump_msg_group(const uint32_t *ump)
+{
+	return snd_ump_msg_hdr_group(*ump);
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __ALSA_UMP_MSG_H */
diff --git a/src/rawmidi/ump_local.h b/src/rawmidi/ump_local.h
index 424051ae688b..53ce9a66dfcf 100644
--- a/src/rawmidi/ump_local.h
+++ b/src/rawmidi/ump_local.h
@@ -1,6 +1,7 @@ 
 /* SPDX-License-Identifier: LGPL-2.1+ */
 #include "rawmidi.h"
 #include "ump.h"
+#include "ump_msg.h"
 
 struct _snd_ump {
 	snd_rawmidi_t *rawmidi;