ble_midi_server.h

/**
 * @brief This library wraps the ble_midi_service_lib to make
 * a Bluetooth LE MIDI server without any other services
 * in the profile. In makes use of the ATT database stored
 * in the global profile_data[] array that the application
 * provides. This data is usually generated by the
 * CMake function pico_btstack_make_gatt_header().
 */
/**
 * MIT License
 *
 * Copyright (c) 2024 rppicomidi
 *
 * 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 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.
 *
 */
#pragma once
#include <stdint.h>
#include "btstack.h"
#include "pico/cyw43_arch.h"
#include "pico/btstack_cyw43.h"
#include "midi_service_stream_handler.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
 * @brief initialize BT hardware and stack and then start advertising
 *
 * @param profile_data is automatically generated from the .gatt file
 * @param resp_data is the data to send in response to active scanning
 * @param resp_data_len is the number of bytes in the resp_data buffer
 */
void ble_midi_server_init(const uint8_t* profile_data, const uint8_t* resp_data, uint8_t resp_data_len, io_capability_t iocaps, uint8_t secmask);

/**
 * @brief disconnect if needed. stop advertising if needed.
 *
 * de-initialize the BT stack and hardware in preparation to switch to client mode
 */
void ble_midi_server_deinit();

/**
 * @brief read a MIDI stream from Bluetooth if connected and data is available
 *
 * @param max_bytes is the maximum number of bytes that can be returned in the midi_stream_bytes buffer
 * @param midi_stream_bytes is buffer to receive bytes read
 * @param timestamp is the Bluetooth MIDI timestamp value
 * @returns the number of bytes stored in the midi_stream_bytes buffer
 */
uint8_t ble_midi_server_stream_read(uint8_t max_bytes, uint8_t* midi_stream_bytes, uint16_t* timestamp);

/**
 * @brief write a MIDI stream to Bluetooth if connected
 *
 * @param nbytes is the number of bytes to write
 * @param midi_stream_bytes is the buffer of bytes to write
 * @return the number of bytes from the stream actually written
 */
uint8_t ble_midi_server_stream_write(uint8_t nbytes, const uint8_t* midi_stream_bytes);

/**
 * @brief request disconnection from currently connected Bluetooth client
 *
 * This function returns before the disconnection is complete.
 */
void ble_midi_server_request_disconnect();

/**
 * @brief
 * 
 * @return true if a Bluetooth client is connected to the server
 */
bool ble_midi_server_is_connected();

#ifdef __cplusplus
}
#endif