/* Opal endpoint interface for Freeswitch Modular Media Switching Software Library /
 * Soft-Switch Application
 *
 * Version: MPL 1.1
 *
 * Copyright (c) 2007 Tuyan Ozipek (tuyanozipek@gmail.com)
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * Contributor(s):
 * Tuyan Ozipek   (tuyanozipek@gmail.com)
 * Lukasz Zwierko (lzwierko@gmail.com)
 * Robert Jongbloed (robertj@voxlucida.com.au)
 *
 */


#ifndef __FREESWITCH_MOD_OPAL__
#define __FREESWITCH_MOD_OPAL__

#define HAVE_APR
#include <switch.h>
#include <switch_version.h>
#define MODNAME "mod_opal"

#undef strcasecmp
#undef strncasecmp

#include <ptlib.h>
#include <opal/manager.h>
#include <opal/localep.h>
#include <h323/h323ep.h>
#include <iax2/iax2ep.h>


class FSEndPoint;
class FSManager;


struct mod_opal_globals {
    int trace_level;
    char *codec_string;
    char *context;
    char *dialplan;
};

extern struct mod_opal_globals mod_opal_globals;


class FSProcess : public PLibraryProcess {
    PCLASSINFO(FSProcess, PLibraryProcess);

 public:
    FSProcess();
    ~FSProcess();

    bool Initialise(switch_loadable_module_interface_t *iface);

    FSManager & GetManager() const { return *m_manager; }

  protected:
    FSManager * m_manager;
};


struct FSListener {
    FSListener() {
    }

    PString name;
    OpalTransportAddress listenAddress;
    PString localUserName;
    PString gatekeeper;
};


class FSManager : public OpalManager {
    PCLASSINFO(FSManager, OpalManager);

 public:
    FSManager();

    bool Initialise(switch_loadable_module_interface_t *iface);

    switch_status_t ReadConfig(int reload);

    switch_endpoint_interface_t *GetSwitchInterface() const {
        return m_FreeSwitch;
    }

  private:
    switch_endpoint_interface_t *m_FreeSwitch;

    H323EndPoint *m_h323ep;
    IAX2EndPoint *m_iaxep;
    FSEndPoint *m_fsep;

    list < FSListener > m_listeners;
};


class FSEndPoint:public OpalLocalEndPoint {
    PCLASSINFO(FSEndPoint, OpalLocalEndPoint);
 public:
    FSEndPoint(FSManager & manager);

    virtual bool OnIncomingCall(OpalLocalConnection &);
    virtual OpalLocalConnection *CreateConnection(OpalCall &, void *);

    bool AddMediaFormat(const switch_codec_implementation_t *codec);

  private:
    PList<OpalMediaFormat> m_globalMediaFormats;
};


#define DECLARE_CALLBACK0(name)                                         \
    static switch_status_t name(switch_core_session_t *session) {       \
        FSConnection * conn = (FSConnection *)switch_core_session_get_private(session); \
        return conn != NULL ? conn->name() : SWITCH_STATUS_FALSE; }     \
switch_status_t name()

#define DECLARE_CALLBACK1(name, type1, name1)                           \
    static switch_status_t name(switch_core_session_t *session, type1 name1) { \
        FSConnection * conn = (FSConnection *)switch_core_session_get_private(session); \
        return conn != NULL ? conn->name(name1) : SWITCH_STATUS_FALSE; } \
    switch_status_t name(type1 name1)

#define DECLARE_CALLBACK3(name, type1, name1, type2, name2, type3, name3) \
    static switch_status_t name(switch_core_session_t *session, type1 name1, type2 name2, type3 name3) { \
        FSConnection * conn = (FSConnection *)switch_core_session_get_private(session); \
        return conn != NULL ? conn->name(name1, name2, name3) : SWITCH_STATUS_FALSE; } \
    switch_status_t name(type1 name1, type2 name2, type3 name3)


class FSConnection:public OpalLocalConnection {
    PCLASSINFO(FSConnection, OpalLocalConnection)

  public:
    FSConnection(OpalCall & call, FSEndPoint & endpoint);

    virtual bool OnIncoming();
    virtual void OnReleased();
    virtual PBoolean SetAlerting(const PString & calleeName, PBoolean withMedia);
    virtual void OnAlerting();
    virtual void OnEstablished();
    virtual OpalMediaStream *CreateMediaStream(const OpalMediaFormat &, unsigned, PBoolean);
    virtual PBoolean OnOpenMediaStream(OpalMediaStream & stream);
    virtual OpalMediaFormatList GetMediaFormats() const;

    void SetCodecs();

    DECLARE_CALLBACK0(on_init);
    DECLARE_CALLBACK0(on_routing);
    DECLARE_CALLBACK0(on_execute);
    DECLARE_CALLBACK0(on_hangup);
    DECLARE_CALLBACK0(on_loopback);
    DECLARE_CALLBACK0(on_transmit);

    DECLARE_CALLBACK1(kill_channel, int, sig);
    DECLARE_CALLBACK1(send_dtmf, const switch_dtmf_t *, dtmf);
    DECLARE_CALLBACK1(receive_message, switch_core_session_message_t *, msg);
    DECLARE_CALLBACK1(receive_event, switch_event_t *, event);
    DECLARE_CALLBACK0(state_change);
    DECLARE_CALLBACK3(read_audio_frame, switch_frame_t **, frame, switch_io_flag_t, flags, int, stream_id);
    DECLARE_CALLBACK3(write_audio_frame, switch_frame_t *, frame, switch_io_flag_t, flags, int, stream_id);
    DECLARE_CALLBACK3(read_video_frame, switch_frame_t **, frame, switch_io_flag_t, flag, int, stream_id);
    DECLARE_CALLBACK3(write_video_frame, switch_frame_t *, frame, switch_io_flag_t, flag, int, stream_id);

    switch_status_t read_frame(const OpalMediaType & mediaType, switch_frame_t **frame, switch_io_flag_t flags);
    switch_status_t write_frame(const OpalMediaType & mediaType, const switch_frame_t *frame, switch_io_flag_t flags);

    switch_core_session_t *GetSession() const {
        return m_fsSession;
    }

  private:
    FSEndPoint & m_endpoint;
    switch_core_session_t *m_fsSession;
    switch_channel_t *m_fsChannel;
    PSyncPoint m_rxAudioOpened;
    PSyncPoint m_txAudioOpened;
    OpalMediaFormatList m_switchMediaFormats;
};


class FSMediaStream:public OpalMediaStream {
    PCLASSINFO(FSMediaStream, OpalMediaStream);
 public:
    FSMediaStream(FSConnection & conn, const OpalMediaFormat & mediaFormat, ///<  Media format for stream
                  unsigned sessionID,   ///<  Session number for stream
                  bool isSource ///<  Is a source stream
                  );

    virtual PBoolean Open();
    virtual PBoolean Close();
    virtual PBoolean IsSynchronous() const;
    virtual PBoolean RequiresPatchThread(OpalMediaStream *) const;

    switch_status_t read_frame(switch_frame_t **frame, switch_io_flag_t flags);
    switch_status_t write_frame(const switch_frame_t *frame, switch_io_flag_t flags);

 private:
    switch_core_session_t *m_fsSession;
    switch_channel_t *m_fsChannel;
    switch_timer_t m_switchTimer;
    switch_codec_t m_switchCodec;
    switch_frame_t m_readFrame;
    RTP_DataFrame m_readRTP;
    bool m_callOnStart;
};


#endif /* __FREESWITCH_MOD_OPAL__ */

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