InfiniTime/src/components/ble/MusicService.cpp

/*  Copyright (C) 2020-2021 JF, Adam Pigg, Avamander

    This file is part of InfiniTime.

    InfiniTime is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published
    by the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    InfiniTime is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.
*/
#include "MusicService.h"
#include "systemtask/SystemTask.h"

int MusicCallback(uint16_t conn_handle, uint16_t attr_handle, struct ble_gatt_access_ctxt* ctxt, void* arg) {
  return static_cast<Pinetime::Controllers::MusicService*>(arg)->OnCommand(conn_handle, attr_handle, ctxt);
}

Pinetime::Controllers::MusicService::MusicService(Pinetime::System::SystemTask& system) : m_system(system) {
  characteristicDefinition[0] = {.uuid = reinterpret_cast<ble_uuid_t*>(&msEventCharUuid),
                                 .access_cb = MusicCallback,
                                 .arg = this,
                                 .flags = BLE_GATT_CHR_F_NOTIFY,
                                 .val_handle = &eventHandle};
  characteristicDefinition[1] = {.uuid = reinterpret_cast<ble_uuid_t*>(&msStatusCharUuid),
                                 .access_cb = MusicCallback,
                                 .arg = this,
                                 .flags = BLE_GATT_CHR_F_WRITE | BLE_GATT_CHR_F_READ};
  characteristicDefinition[2] = {.uuid = reinterpret_cast<ble_uuid_t*>(&msTrackCharUuid),
                                 .access_cb = MusicCallback,
                                 .arg = this,
                                 .flags = BLE_GATT_CHR_F_WRITE | BLE_GATT_CHR_F_READ};
  characteristicDefinition[3] = {.uuid = reinterpret_cast<ble_uuid_t*>(&msArtistCharUuid),
                                 .access_cb = MusicCallback,
                                 .arg = this,
                                 .flags = BLE_GATT_CHR_F_WRITE | BLE_GATT_CHR_F_READ};
  characteristicDefinition[4] = {.uuid = reinterpret_cast<ble_uuid_t*>(&msAlbumCharUuid),
                                 .access_cb = MusicCallback,
                                 .arg = this,
                                 .flags = BLE_GATT_CHR_F_WRITE | BLE_GATT_CHR_F_READ};
  characteristicDefinition[5] = {.uuid = reinterpret_cast<ble_uuid_t*>(&msPositionCharUuid),
                                 .access_cb = MusicCallback,
                                 .arg = this,
                                 .flags = BLE_GATT_CHR_F_WRITE | BLE_GATT_CHR_F_READ};
  characteristicDefinition[6] = {.uuid = reinterpret_cast<ble_uuid_t*>(&msTotalLengthCharUuid),
                                 .access_cb = MusicCallback,
                                 .arg = this,
                                 .flags = BLE_GATT_CHR_F_WRITE | BLE_GATT_CHR_F_READ};
  characteristicDefinition[7] = {.uuid = reinterpret_cast<ble_uuid_t*>(&msTotalLengthCharUuid),
                                 .access_cb = MusicCallback,
                                 .arg = this,
                                 .flags = BLE_GATT_CHR_F_WRITE | BLE_GATT_CHR_F_READ};
  characteristicDefinition[8] = {.uuid = reinterpret_cast<ble_uuid_t*>(&msTrackNumberCharUuid),
                                 .access_cb = MusicCallback,
                                 .arg = this,
                                 .flags = BLE_GATT_CHR_F_WRITE | BLE_GATT_CHR_F_READ};
  characteristicDefinition[9] = {.uuid = reinterpret_cast<ble_uuid_t*>(&msTrackTotalCharUuid),
                                 .access_cb = MusicCallback,
                                 .arg = this,
                                 .flags = BLE_GATT_CHR_F_WRITE | BLE_GATT_CHR_F_READ};
  characteristicDefinition[10] = {.uuid = reinterpret_cast<ble_uuid_t*>(&msPlaybackSpeedCharUuid),
                                  .access_cb = MusicCallback,
                                  .arg = this,
                                  .flags = BLE_GATT_CHR_F_WRITE | BLE_GATT_CHR_F_READ};
  characteristicDefinition[11] = {.uuid = reinterpret_cast<ble_uuid_t*>(&msRepeatCharUuid),
                                  .access_cb = MusicCallback,
                                  .arg = this,
                                  .flags = BLE_GATT_CHR_F_WRITE | BLE_GATT_CHR_F_READ};
  characteristicDefinition[12] = {.uuid = reinterpret_cast<ble_uuid_t*>(&msShuffleCharUuid),
                                  .access_cb = MusicCallback,
                                  .arg = this,
                                  .flags = BLE_GATT_CHR_F_WRITE | BLE_GATT_CHR_F_READ};
  characteristicDefinition[13] = {0};

  serviceDefinition[0] = {
    .type = BLE_GATT_SVC_TYPE_PRIMARY, .uuid = reinterpret_cast<ble_uuid_t*>(&msUuid), .characteristics = characteristicDefinition};
  serviceDefinition[1] = {0};

  artistName = "Waiting for";
  albumName = "";
  trackName = "track information..";
  playing = false;
  repeat = false;
  shuffle = false;
  playbackSpeed = 1.0f;
  trackProgress = 0;
  trackLength = 0;
}

void Pinetime::Controllers::MusicService::Init() {
  uint8_t res = 0;
  res = ble_gatts_count_cfg(serviceDefinition);
  ASSERT(res == 0);

  res = ble_gatts_add_svcs(serviceDefinition);
  ASSERT(res == 0);
}

int Pinetime::Controllers::MusicService::OnCommand(uint16_t conn_handle, uint16_t attr_handle, struct ble_gatt_access_ctxt* ctxt) {
  if (ctxt->op == BLE_GATT_ACCESS_OP_WRITE_CHR) {
    size_t notifSize = OS_MBUF_PKTLEN(ctxt->om);
    char data[notifSize + 1];
    data[notifSize] = '\0';
    os_mbuf_copydata(ctxt->om, 0, notifSize, data);
    char* s = &data[0];
    if (ble_uuid_cmp(ctxt->chr->uuid, reinterpret_cast<ble_uuid_t*>(&msArtistCharUuid)) == 0) {
      artistName = s;
    } else if (ble_uuid_cmp(ctxt->chr->uuid, reinterpret_cast<ble_uuid_t*>(&msTrackCharUuid)) == 0) {
      trackName = s;
    } else if (ble_uuid_cmp(ctxt->chr->uuid, reinterpret_cast<ble_uuid_t*>(&msAlbumCharUuid)) == 0) {
      albumName = s;
    } else if (ble_uuid_cmp(ctxt->chr->uuid, reinterpret_cast<ble_uuid_t*>(&msStatusCharUuid)) == 0) {
      playing = s[0];
    } else if (ble_uuid_cmp(ctxt->chr->uuid, reinterpret_cast<ble_uuid_t*>(&msRepeatCharUuid)) == 0) {
      repeat = s[0];
    } else if (ble_uuid_cmp(ctxt->chr->uuid, reinterpret_cast<ble_uuid_t*>(&msShuffleCharUuid)) == 0) {
      shuffle = s[0];
    } else if (ble_uuid_cmp(ctxt->chr->uuid, reinterpret_cast<ble_uuid_t*>(&msPositionCharUuid)) == 0) {
      trackProgress = (s[0] << 24) | (s[1] << 16) | (s[2] << 8) | s[3];
    } else if (ble_uuid_cmp(ctxt->chr->uuid, reinterpret_cast<ble_uuid_t*>(&msTotalLengthCharUuid)) == 0) {
      trackLength = (s[0] << 24) | (s[1] << 16) | (s[2] << 8) | s[3];
    } else if (ble_uuid_cmp(ctxt->chr->uuid, reinterpret_cast<ble_uuid_t*>(&msTrackNumberCharUuid)) == 0) {
      trackNumber = (s[0] << 24) | (s[1] << 16) | (s[2] << 8) | s[3];
    } else if (ble_uuid_cmp(ctxt->chr->uuid, reinterpret_cast<ble_uuid_t*>(&msTrackTotalCharUuid)) == 0) {
      tracksTotal = (s[0] << 24) | (s[1] << 16) | (s[2] << 8) | s[3];
    } else if (ble_uuid_cmp(ctxt->chr->uuid, reinterpret_cast<ble_uuid_t*>(&msPlaybackSpeedCharUuid)) == 0) {
      playbackSpeed = static_cast<float>(((s[0] << 24) | (s[1] << 16) | (s[2] << 8) | s[3])) / 100.0f;
    }
  }
  return 0;
}

std::string Pinetime::Controllers::MusicService::getAlbum() const {
  return albumName;
}

std::string Pinetime::Controllers::MusicService::getArtist() const {
  return artistName;
}

std::string Pinetime::Controllers::MusicService::getTrack() const {
  return trackName;
}

bool Pinetime::Controllers::MusicService::isPlaying() const {
  return playing;
}

float Pinetime::Controllers::MusicService::getPlaybackSpeed() const {
  return playbackSpeed;
}

int Pinetime::Controllers::MusicService::getProgress() const {
  return trackProgress;
}

int Pinetime::Controllers::MusicService::getTrackLength() const {
  return trackLength;
}

void Pinetime::Controllers::MusicService::event(char event) {
  auto* om = ble_hs_mbuf_from_flat(&event, 1);

  uint16_t connectionHandle = m_system.nimble().connHandle();

  if (connectionHandle == 0 || connectionHandle == BLE_HS_CONN_HANDLE_NONE) {
    return;
  }

  ble_gattc_notify_custom(connectionHandle, eventHandle, om);
}