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/* Spa V4l2 dbus
*
* Copyright © 2022 Pauli Virtanen
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#ifndef SPA_BT_MIDI_H_
#define SPA_BT_MIDI_H_
#include <stddef.h>
#include <stdint.h>
#include <stdbool.h>
#include <gio/gio.h>
#include <spa/utils/defs.h>
#include <spa/support/log.h>
#define BLUEZ_SERVICE "org.bluez"
#define BLUEZ_ADAPTER_INTERFACE BLUEZ_SERVICE ".Adapter1"
#define BLUEZ_DEVICE_INTERFACE BLUEZ_SERVICE ".Device1"
#define BLUEZ_GATT_MANAGER_INTERFACE BLUEZ_SERVICE ".GattManager1"
#define BLUEZ_GATT_PROFILE_INTERFACE BLUEZ_SERVICE ".GattProfile1"
#define BLUEZ_GATT_SERVICE_INTERFACE BLUEZ_SERVICE ".GattService1"
#define BLUEZ_GATT_CHR_INTERFACE BLUEZ_SERVICE ".GattCharacteristic1"
#define BLUEZ_GATT_DSC_INTERFACE BLUEZ_SERVICE ".GattDescriptor1"
#define BT_MIDI_SERVICE_UUID "03b80e5a-ede8-4b33-a751-6ce34ec4c700"
#define BT_MIDI_CHR_UUID "7772e5db-3868-4112-a1a9-f2669d106bf3"
#define BT_GATT_CHARACTERISTIC_USER_DESCRIPTION_UUID "00002901-0000-1000-8000-00805f9b34fb"
#define MIDI_BUF_SIZE 8192
#define MIDI_MAX_MTU 8192
#define MIDI_CLOCK_PERIOD_MSEC 0x2000
#define MIDI_CLOCK_PERIOD_NSEC (MIDI_CLOCK_PERIOD_MSEC * SPA_NSEC_PER_MSEC)
struct spa_bt_midi_server
{
const char *chr_path;
};
struct spa_bt_midi_parser {
unsigned int size;
unsigned int sysex:1;
uint8_t buf[MIDI_BUF_SIZE];
};
struct spa_bt_midi_writer {
unsigned int size;
unsigned int mtu;
unsigned int pos;
uint8_t running_status;
uint64_t running_time_msec;
unsigned int flush:1;
uint8_t buf[MIDI_MAX_MTU];
};
struct spa_bt_midi_server_cb
{
int (*acquire_notify)(void *user_data, int fd, uint16_t mtu);
int (*acquire_write)(void *user_data, int fd, uint16_t mtu);
int (*release)(void *user_data);
const char *(*get_description)(void *user_data);
};
static inline void spa_bt_midi_parser_init(struct spa_bt_midi_parser *parser)
{
parser->size = 0;
parser->sysex = 0;
}
static inline void spa_bt_midi_parser_dup(struct spa_bt_midi_parser *src, struct spa_bt_midi_parser *dst, bool only_time)
{
dst->size = src->size;
dst->sysex = src->sysex;
if (!only_time)
memcpy(dst->buf, src->buf, src->size);
}
/**
* Parse a single BLE MIDI data packet to normalized MIDI events.
*/
int spa_bt_midi_parser_parse(struct spa_bt_midi_parser *parser,
const uint8_t *src, size_t src_size,
bool only_time,
void (*event)(void *user_data, uint16_t time, uint8_t *event, size_t event_size),
void *user_data);
static inline void spa_bt_midi_writer_init(struct spa_bt_midi_writer *writer, unsigned int mtu)
{
writer->size = 0;
writer->mtu = SPA_MIN(mtu, (unsigned int)MIDI_MAX_MTU);
writer->pos = 0;
writer->running_status = 0;
writer->running_time_msec = 0;
writer->flush = 0;
}
/**
* Add a new event to midi writer buffer.
*
* spa_bt_midi_writer_init(&writer, mtu);
* for (time, event, size) in midi events {
* do {
* res = spa_bt_midi_writer_write(&writer, time, event, size);
* if (res < 0) {
* fail with error
* } else if (res) {
* send_packet(writer->buf, writer->size);
* }
* } while (res);
* }
* if (writer.size > 0)
* send_packet(writer->buf, writer->size);
*/
int spa_bt_midi_writer_write(struct spa_bt_midi_writer *writer,
uint64_t time, const uint8_t *event, size_t event_size);
struct spa_bt_midi_server *spa_bt_midi_server_new(const struct spa_bt_midi_server_cb *cb,
GDBusConnection *conn, struct spa_log *log, void *user_data);
void spa_bt_midi_server_released(struct spa_bt_midi_server *server, bool write);
void spa_bt_midi_server_destroy(struct spa_bt_midi_server *server);
#endif
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