Line data    Source code

       1             : #pragma once
       2             : 
       3             : #ifdef ARDUINO
       4             : 
       5             : #ifndef ARDUINO_ARCH_ESP32
       6             : #error "MIDI over Bluetooth is only supported on ESP32 boards"
       7             : #endif
       8             : 
       9             : #include <BLE2902.h>
      10             : #include <BLEDevice.h>
      11             : #include <BLEServer.h>
      12             : #include <BLEUtils.h>
      13             : 
      14             : #include <Helpers/Error.hpp>
      15             : 
      16             : BEGIN_CS_NAMESPACE
      17             : 
      18             : // https://www.midi.org/specifications/item/bluetooth-le-midi
      19             : const char *SERVICE_UUID = "03b80e5a-ede8-4b33-a751-6ce34ec4c700";
      20             : const char *CHARACTERISTIC_UUID = "7772e5db-3868-4112-a1a9-f2669d106bf3";
      21             : 
      22             : constexpr const char *BLE_MIDI_NAME = "Control Surface (BLE)";
      23             : 
      24             : class BLEMIDI {
      25             :   public:
      26             :     ~BLEMIDI() {
      27             :         // TODO
      28             :     }
      29             : 
      30             :     /** 
      31             :      * @note    Must be called after begin.
      32             :      */
      33             :     void setServerCallbacks(BLEServerCallbacks *cb) {
      34             :         if (pServer == nullptr) {
      35             :             ERROR(F("Error: pServer has not been initialized"), 0x2020);
      36             :             return;
      37             :         }
      38             :         pServer->setCallbacks(cb);
      39             :     }
      40             : 
      41             :     /** 
      42             :      * @note    Must be called after begin.
      43             :      */
      44             :     void setCharacteristicsCallbacks(BLECharacteristicCallbacks *cb) {
      45             :         if (pCharacteristic == nullptr) {
      46             :             ERROR(F("Error: Characteristic has not been initialized"), 0x2021);
      47             :             return;
      48             :         }
      49             :         pCharacteristic->setCallbacks(cb);
      50             :     }
      51             : 
      52             :     void begin(BLEServerCallbacks *serverCallbacks,
      53             :                BLECharacteristicCallbacks *midiCallbacks) {
      54             :         DEBUGFN("Initializing BLE MIDI Interface");
      55             :         if (BLEDevice::getInitialized()) {
      56             :             ERROR(F("Error: BLEDevice is initialized already"), 0x2022);
      57             :             return; // TODO: What to do here?
      58             :         }
      59             : 
      60             :         // Initialize the BLE device
      61             :         BLEDevice::init(BLE_MIDI_NAME);
      62             : 
      63             :         // Create the BLE server
      64             :         pServer = BLEDevice::createServer();
      65             :         setServerCallbacks(serverCallbacks);
      66             : 
      67             :         // Create the BLE service
      68             :         BLEService *pService = pServer->createService(BLEUUID(SERVICE_UUID));
      69             : 
      70             :         // Create a BLE characteristic
      71             :         pCharacteristic = pService->createCharacteristic(
      72             :             BLEUUID(CHARACTERISTIC_UUID),
      73             :             BLECharacteristic::PROPERTY_READ |
      74             :                 BLECharacteristic::PROPERTY_NOTIFY |
      75             :                 BLECharacteristic::PROPERTY_WRITE_NR);
      76             : 
      77             :         // Create a BLE descriptor
      78             :         descriptor = new BLE2902();
      79             :         pCharacteristic->addDescriptor(descriptor);
      80             :         // descriptor.setNotifications(true);
      81             :         setCharacteristicsCallbacks(midiCallbacks);
      82             : 
      83             :         // Start the service
      84             :         pService->start();
      85             : 
      86             :         // Start advertising
      87             :         BLEAdvertising *pAdvertising = pServer->getAdvertising();
      88             :         pAdvertising->addServiceUUID(pService->getUUID());
      89             :         pAdvertising->start();
      90             :     }
      91             : 
      92             :     void notifyValue(uint8_t *data, size_t len) {
      93             :         pCharacteristic->setValue(data, len);
      94             :         pCharacteristic->notify();
      95             :     }
      96             : 
      97             :     std::string getValue() { return pCharacteristic->getValue(); }
      98             : 
      99             :   private:
     100             :     BLECharacteristic *pCharacteristic = nullptr;
     101             :     BLEServer *pServer = nullptr;
     102             :     BLE2902 *descriptor;
     103             : };
     104             : 
     105             : END_CS_NAMESPACE
     106             : 
     107             : #else
     108             : 
     109             : #include <Def/Def.hpp>
     110             : #include <gmock-wrapper.h>
     111             : #include <string>
     112             : 
     113             : class BLECharacteristic {
     114             :   public:
     115           0 :     MOCK_METHOD0(getValue, std::string(void));
     116           0 :     MOCK_METHOD2(setValue, void(uint8_t *data, size_t len));
     117             : };
     118             : 
     119          10 : class BLECharacteristicCallbacks {
     120             :   public:
     121          10 :     virtual ~BLECharacteristicCallbacks() = default;
     122           0 :     virtual void onRead(UNUSED_PARAM BLECharacteristic *pCharacteristic) {}
     123           0 :     virtual void onWrite(UNUSED_PARAM BLECharacteristic *pCharacteristic) {}
     124             : };
     125             : 
     126             : class BLEServer {};
     127             : 
     128          10 : class BLEServerCallbacks {
     129             :   public:
     130          10 :     virtual ~BLEServerCallbacks() = default;
     131           0 :     virtual void onConnect(UNUSED_PARAM BLEServer *pServer) {}
     132           0 :     virtual void onDisconnect(UNUSED_PARAM BLEServer *pServer) {}
     133             : };
     134             : 
     135             : BEGIN_CS_NAMESPACE
     136             : 
     137          20 : class BLEMIDI {
     138             :   public:
     139             :     MOCK_METHOD1(setServerCallbacks, void(BLEServerCallbacks *));
     140             :     MOCK_METHOD1(setCharacteristicsCallbacks,
     141             :                  void(BLECharacteristicCallbacks *));
     142          20 :     MOCK_METHOD2(begin,
     143             :                  void(BLEServerCallbacks *, BLECharacteristicCallbacks *));
     144           0 :     MOCK_METHOD2(notifyValue, void(uint8_t *data, size_t len));
     145             :     MOCK_METHOD0(getValue, std::string(void));
     146             : };
     147             : 
     148             : END_CS_NAMESPACE
     149             : 
     150             : #endif