pipewire/src/tools/midifile.h

/* PipeWire */
/* SPDX-FileCopyrightText: Copyright © 2020 Wim Taymans */
/* SPDX-License-Identifier: MIT */

#include <stdio.h>

#include <spa/utils/defs.h>

struct midi_file;

struct midi_event {
#define MIDI_EVENT_TYPE_MIDI1		0
#define MIDI_EVENT_TYPE_UMP		1
	uint32_t type;
	uint32_t track;
	double sec;
	uint8_t *data;
	uint32_t size;
	struct {
		uint32_t offset;
		uint32_t size;
		union {
			struct {
				uint32_t uspqn; /* microseconds per quarter note */
			} tempo;
		} parsed;
	} meta;
};

struct midi_file_info {
	uint16_t format;
	uint16_t ntracks;
	uint16_t division;
};

struct midi_file *
midi_file_open(const char *filename, const char *mode, struct midi_file_info *info);

int midi_file_close(struct midi_file *mf);

int midi_file_next_time(struct midi_file *mf, double *sec);

int midi_file_read_event(struct midi_file *mf, struct midi_event *event);

int midi_file_write_event(struct midi_file *mf, const struct midi_event *event);

int midi_file_dump_event(FILE *out, const struct midi_event *event);