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