/*
 * ast_h323.h
 *
 * OpenH323 Channel Driver for ASTERISK PBX.
 *			By Jeremy McNamara
 *                      For The NuFone Network 
 * 
 * This code has been derived from code created by
 *              Michael Manousos and Mark Spencer
 *
 * This file is part of the chan_h323 driver for Asterisk
 *
 * chan_h323 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 2 of the License, or
 * (at your option) any later version.
 *
 * chan_h323 is distributed 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, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * Version Info: $Id$
 */

#ifndef AST_H323_H
#define AST_H323_H

#define VERSION(a,b,c) ((a)*10000+(b)*100+(c))

#if 0
/**  These need to be redefined here because the C++
     side of this driver is blind to the asterisk headers */
/*! G.723.1 compression */
#define AST_FORMAT_G723_1	(1 << 0)
/*! GSM compression */
#define AST_FORMAT_GSM		(1 << 1)
/*! Raw mu-law data (G.711) */
#define AST_FORMAT_ULAW		(1 << 2)
/*! Raw A-law data (G.711) */
#define AST_FORMAT_ALAW		(1 << 3)
/*! MPEG-2 layer 3 */
#define AST_FORMAT_MP3		(1 << 4)
/*! ADPCM (whose?) */
#define AST_FORMAT_ADPCM	(1 << 5)
/*! Raw 16-bit Signed Linear (8000 Hz) PCM */
#define AST_FORMAT_SLINEAR	(1 << 6)
/*! LPC10, 180 samples/frame */
#define AST_FORMAT_LPC10	(1 << 7)
/*! G.729A audio */
#define AST_FORMAT_G729A	(1 << 8)
/*! SpeeX Free Compression */
#define AST_FORMAT_SPEEX	(1 << 9)
/*! ILBC Free Codec */
#define AST_FORMAT_ILBC		(1 << 10)
#endif

/**This class describes the G.723.1 codec capability.
 */
class H323_G7231Capability : public H323AudioCapability
{
	PCLASSINFO(H323_G7231Capability, H323AudioCapability);

public:
	H323_G7231Capability(BOOL annexA = TRUE);
	Comparison Compare(const PObject & obj) const;
	virtual PObject * Clone() const;
	virtual H323Codec * CreateCodec(H323Codec::Direction direction) const;
	virtual unsigned GetSubType() const;
	virtual PString GetFormatName() const;
	virtual BOOL OnSendingPDU(H245_AudioCapability & pdu, unsigned packetSize) const;
	virtual BOOL OnReceivedPDU(const H245_AudioCapability & pdu, unsigned & packetSize);

protected:
	BOOL annexA;
};

/**This class describes the (fake) G729 codec capability.
 */
class AST_G729Capability : public H323AudioCapability
{
	PCLASSINFO(AST_G729Capability, H323AudioCapability);

public:
	AST_G729Capability();
	/* Create a copy of the object. */
	virtual PObject * Clone() const;

	/* Create the codec instance, allocating resources as required. */
	virtual H323Codec * CreateCodec(H323Codec::Direction direction) const;

	/* Get the sub-type of the capability. This is a code dependent on the
	   main type of the capability.

	   This returns one of the four possible combinations of mode and speed
	   using the enum values of the protocol ASN H245_AudioCapability class. */
	virtual unsigned GetSubType() const;

	/* Get the name of the media data format this class represents. */
	virtual PString GetFormatName() const;
};

/* This class describes the VoiceAge G729A codec capability. */
class AST_G729ACapability : public H323AudioCapability
{
	PCLASSINFO(AST_G729ACapability, H323AudioCapability);

public:
	/* Create a new G.729A capability. */
	AST_G729ACapability();

	/* Create a copy of the object. */
	virtual PObject * Clone() const;
	/* Create the codec instance, allocating resources as required. */
	virtual H323Codec * CreateCodec(H323Codec::Direction direction) const;

	/* Get the sub-type of the capability. This is a code dependent on the
	   main type of the capability.

	   This returns one of the four possible combinations of mode and speed
	   using the enum values of the protocol ASN H245_AudioCapability class. */
	virtual unsigned GetSubType() const;

	/* Get the name of the media data format this class represents. */
	virtual PString GetFormatName() const;
};

/* This class describes the GSM-06.10 codec capability. */
class AST_GSM0610Capability : public H323AudioCapability
{
	PCLASSINFO(AST_GSM0610Capability, H323AudioCapability);

public:
	/* Create a new GSM capability. */
	AST_GSM0610Capability(int comfortNoise = 0, int scrambled = 0);

	/* Create a copy of the object. */
	virtual PObject * Clone() const;

	/* Create the codec instance, allocating resources as required. */
	virtual H323Codec * CreateCodec(H323Codec::Direction direction) const;

	/* Get the sub-type of the capability. This is a code dependent on the
	   main type of the capability.

	   This returns one of the four possible combinations of mode and speed
	   using the enum values of the protocol ASN H245_AudioCapability class. */
	virtual unsigned GetSubType() const;

	/* Get the name of the media data format this class represents. */
	virtual PString GetFormatName() const;

	BOOL OnSendingPDU(H245_AudioCapability & pdu, unsigned packetSize) const;
	BOOL OnReceivedPDU(const H245_AudioCapability & pdu, unsigned & packetSize);

protected:
	int comfortNoise;
	int scrambled;
};

class MyH323EndPoint : public H323EndPoint
{
	PCLASSINFO(MyH323EndPoint, H323EndPoint);

public:
	MyH323EndPoint();
	int MyMakeCall(const PString &, PString &, void *_callReference, void *_opts);
	BOOL ClearCall(const PString &, H323Connection::CallEndReason reason);
	BOOL ClearCall(const PString &);

	void OnClosedLogicalChannel(H323Connection &, const H323Channel &);
	void OnConnectionEstablished(H323Connection &, const PString &);
	void OnConnectionCleared(H323Connection &, const PString &);
	virtual H323Connection * CreateConnection(unsigned, void *, H323Transport *, H323SignalPDU *);
	void SendUserTone(const PString &, char);
	BOOL OnConnectionForwarded(H323Connection &, const PString &, const H323SignalPDU &);
	BOOL ForwardConnection(H323Connection &, const PString &, const H323SignalPDU &);
	void SetEndpointTypeInfo( H225_EndpointType & info ) const;
	void SetGateway(void);
	PStringArray SupportedPrefixes;
};

class MyH323Connection : public H323Connection
{
	PCLASSINFO(MyH323Connection, H323Connection);

public:
	MyH323Connection(MyH323EndPoint &, unsigned, unsigned);
	~MyH323Connection();
	H323Channel * CreateRealTimeLogicalChannel(const H323Capability &,
			H323Channel::Directions,
			unsigned,
			const H245_H2250LogicalChannelParameters *,
			RTP_QOS *);
	H323Connection::AnswerCallResponse OnAnswerCall(const PString &,
			const H323SignalPDU &,
			H323SignalPDU &);
	void OnReceivedReleaseComplete(const H323SignalPDU &);
	BOOL OnAlerting(const H323SignalPDU &, const PString &);
	BOOL OnSendReleaseComplete(H323SignalPDU &);
	BOOL OnReceivedSignalSetup(const H323SignalPDU &);
	BOOL OnReceivedFacility(const H323SignalPDU &);
	BOOL OnSendSignalSetup(H323SignalPDU &);
	BOOL OnStartLogicalChannel(H323Channel &);
	BOOL OnClosingLogicalChannel(H323Channel &);
	virtual void SendUserInputTone(char tone, unsigned duration = 0, unsigned logicalChannel = 0, unsigned rtpTimestamp = 0);
	virtual void OnUserInputTone(char, unsigned, unsigned, unsigned);
	virtual void OnUserInputString(const PString &value);
	BOOL OnReceivedProgress(const H323SignalPDU &);
	void OnSendCapabilitySet(H245_TerminalCapabilitySet &);
	void OnSetLocalCapabilities();
	void SetCapabilities(int, int, void *, int);
	BOOL OnReceivedCapabilitySet(const H323Capabilities &, const H245_MultiplexCapability *,
			H245_TerminalCapabilitySetReject &);
	void SetCause(int _cause) { cause = _cause; };
	virtual BOOL StartControlChannel(const H225_TransportAddress & h245Address);
	void SetCallOptions(void *opts, BOOL isIncoming);
	void SetCallDetails(void *callDetails, const H323SignalPDU &setupPDU, BOOL isIncoming);
#ifdef TUNNELLING
	virtual BOOL HandleSignalPDU(H323SignalPDU &pdu);
	BOOL EmbedTunneledInfo(H323SignalPDU &pdu);
#endif

	PString sourceAliases;
	PString destAliases;
	PString sourceE164;
	PString destE164;
	PString rdnis;
	int redirect_reason;

	WORD sessionId;
	BOOL bridging;
#ifdef TUNNELLING
	int remoteTunnelOptions;
	int tunnelOptions;
#endif

	unsigned progressSetup;
	unsigned progressAlert;
	int cause;

	RTP_DataFrame::PayloadTypes dtmfCodec;
	int dtmfMode;
};

class MyH323_ExternalRTPChannel : public H323_ExternalRTPChannel
{
	PCLASSINFO(MyH323_ExternalRTPChannel, H323_ExternalRTPChannel);

public:
	MyH323_ExternalRTPChannel(
			MyH323Connection & connection,
			const H323Capability & capability,
			Directions direction,
			unsigned sessionID);

	~MyH323_ExternalRTPChannel();

	/* Overrides */
	BOOL Start(void);
	BOOL OnReceivedAckPDU(const H245_H2250LogicalChannelAckParameters & param);

protected:
	BYTE payloadCode;

	PIPSocket::Address localIpAddr;
	PIPSocket::Address remoteIpAddr;
	WORD localPort;
	WORD remotePort;
};

/**
 * The MyProcess is a necessary descendant PProcess class so that the H323EndPoint
 * objected to be created from within that class. (Solves the who owns main() problem).
 */
class MyProcess : public PProcess
{
	PCLASSINFO(MyProcess, PProcess);

public:
	MyProcess();
	~MyProcess();
	void Main();
};

#include "compat_h323.h"

#endif /* !defined AST_H323_H */