AirTunesServer.h

/*
 * Many concepts and protocol specification in this code are taken from
 * the Boxee project. http://www.boxee.tv
 *
 *  Copyright (C) 2011-2018 Team Kodi
 *  This file is part of Kodi - https://kodi.tv
 *
 *  SPDX-License-Identifier: GPL-2.0-or-later
 *  See LICENSES/README.md for more information.
 */

#pragma once

#include "filesystem/PipeFile.h"
#include "interfaces/IActionListener.h"
#include "interfaces/IAnnouncer.h"
#include "threads/CriticalSection.h"
#include "threads/Thread.h"

#include <list>
#include <string>
#include <vector>

#include <arpa/inet.h>
#include <netinet/in.h>
#include <shairplay/raop.h>
#include <sys/socket.h>
#include <sys/types.h>

class CDACP;
class CVariant;

class CAirTunesServer : public ANNOUNCEMENT::IAnnouncer, public IActionListener, public CThread
{
public:
  // ANNOUNCEMENT::IAnnouncer
  void Announce(ANNOUNCEMENT::AnnouncementFlag flag,
                const std::string& sender,
                const std::string& message,
                const CVariant& data) override;

  void RegisterActionListener(bool doRegister);
  static void EnableActionProcessing(bool enable);
  // IACtionListener
  bool OnAction(const CAction &action) override;

  //CThread
  void Process() override;

  static bool StartServer(int port, bool nonlocal, bool usePassword, const std::string &password="");
  static void StopServer(bool bWait);
  static bool IsRunning();
  bool IsRAOPRunningInternal();
  static void SetMetadataFromBuffer(const char *buffer, unsigned int size);
  static void SetCoverArtFromBuffer(const char *buffer, unsigned int size);
  static void SetupRemoteControl();
  static void FreeDACPRemote();

private:
  CAirTunesServer(int port, bool nonlocal);
  ~CAirTunesServer() override;
  bool Initialize(const std::string &password);
  void Deinitialize();
  static void RefreshCoverArt(const char *outputFilename = NULL);
  static void RefreshMetadata();
  static void ResetMetadata();
  static void InformPlayerAboutPlayTimes();

  int m_port;
  raop_t* m_pRaop = nullptr;
  XFILE::CPipeFile *m_pPipe;
  static CAirTunesServer *ServerInstance;
  static std::string m_macAddress;
  static CCriticalSection m_metadataLock;
  static std::string m_metadata[3];//0 - album, 1 - title, 2 - artist
  static bool m_streamStarted;
  static CCriticalSection m_dacpLock;
  static CDACP *m_pDACP;
  static std::string m_dacp_id;
  static std::string m_active_remote_header;
  static CCriticalSection m_actionQueueLock;
  static std::list<CAction> m_actionQueue;
  static CEvent m_processActions;
  static int m_sampleRate;
  static unsigned int m_cachedStartTime;
  static unsigned int m_cachedEndTime;
  static unsigned int m_cachedCurrentTime;

  class AudioOutputFunctions
  {
    public:
      static void* audio_init(void *cls, int bits, int channels, int samplerate);
      static void  audio_set_volume(void *cls, void *session, float volume);
        static void  audio_set_metadata(void *cls, void *session, const void *buffer, int buflen);
        static void  audio_set_coverart(void *cls, void *session, const void *buffer, int buflen);
      static void  audio_process(void *cls, void *session, const void *buffer, int buflen);
      static void  audio_destroy(void *cls, void *session);
      static void  audio_remote_control_id(void *cls, const char *identifier, const char *active_remote_header);
      static void  audio_set_progress(void *cls, void *session, unsigned int start, unsigned int curr, unsigned int end);
    };
};