jack2/common/JackNetTool.cpp

/*
Copyright (C) 2008 Romain Moret at Grame

This program 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.

This program 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#include "JackNetTool.h"

#ifdef __APPLE__

#include <mach/mach_time.h>

class HardwareClock
{
public:
	HardwareClock();

	void Reset();
	void Update();

	float GetDeltaTime() const;
	double GetTime() const;		
	
private:
	double m_clockToSeconds;

	uint64_t m_startAbsTime;
	uint64_t m_lastAbsTime;

	double m_time;
	float m_deltaTime;
};

HardwareClock::HardwareClock()
{
	mach_timebase_info_data_t info;
	mach_timebase_info(&info);
	m_clockToSeconds = (double)info.numer/info.denom/1000000000.0;

	Reset();
}

void HardwareClock::Reset()
{
	m_startAbsTime = mach_absolute_time();
	m_lastAbsTime = m_startAbsTime;
	
	m_time = m_startAbsTime*m_clockToSeconds;
	m_deltaTime = 1.0f/60.0f;
}

void HardwareClock::Update()
{
	const uint64_t currentTime = mach_absolute_time();
	const uint64_t dt = currentTime - m_lastAbsTime;

	m_time = currentTime*m_clockToSeconds;
	m_deltaTime = (double)dt*m_clockToSeconds;

	m_lastAbsTime = currentTime;
}

float HardwareClock::GetDeltaTime() const
{
	return m_deltaTime;
}

double HardwareClock::GetTime() const
{
	return m_time;
}

#endif

using namespace std;

namespace Jack
{
// NetMidiBuffer**********************************************************************************

    NetMidiBuffer::NetMidiBuffer ( session_params_t* params, uint32_t nports, char* net_buffer )
    {
        fNPorts = nports;
        fMaxBufsize = fNPorts * sizeof ( sample_t ) * params->fPeriodSize ;
        fMaxPcktSize = params->fMtu - sizeof ( packet_header_t );
        fBuffer = new char[fMaxBufsize];
        fPortBuffer = new JackMidiBuffer* [fNPorts];
        for ( int port_index = 0; port_index < fNPorts; port_index++ )
            fPortBuffer[port_index] = NULL;
        fNetBuffer = net_buffer;
        
        fCycleSize = params->fMtu * (max(params->fSendMidiChannels, params->fReturnMidiChannels) *
                                     params->fPeriodSize * sizeof(sample_t) / (params->fMtu - sizeof(packet_header_t)));
    }

    NetMidiBuffer::~NetMidiBuffer()
    {
        delete[] fBuffer;
        delete[] fPortBuffer;
    }

    size_t NetMidiBuffer::GetCycleSize()
    {
        return fCycleSize;
    }
    
    int NetMidiBuffer::GetNumPackets()
    {
        /*
        return (data_size % PACKET_AVAILABLE_SIZE) 
                ? (data_size / PACKET_AVAILABLE_SIZE + 1) 
                : data_size / PACKET_AVAILABLE_SIZE;
        */ 
        
        //TODO
        return 0;
    }

    void NetMidiBuffer::SetBuffer ( int index, JackMidiBuffer* buffer )
    {
        fPortBuffer[index] = buffer;
    }

    JackMidiBuffer* NetMidiBuffer::GetBuffer ( int index )
    {
        return fPortBuffer[index];
    }

    void NetMidiBuffer::DisplayEvents()
    {
        for ( int port_index = 0; port_index < fNPorts; port_index++ )
        {
            for ( uint event = 0; event < fPortBuffer[port_index]->event_count; event++ )
                if ( fPortBuffer[port_index]->IsValid() )
                    jack_info ( "port %d : midi event %u/%u -> time : %u, size : %u",
                                port_index + 1, event + 1, fPortBuffer[port_index]->event_count,
                                fPortBuffer[port_index]->events[event].time, fPortBuffer[port_index]->events[event].size );
        }
    }

    int NetMidiBuffer::RenderFromJackPorts()
    {
        int pos = 0;
        size_t copy_size;
        for ( int port_index = 0; port_index < fNPorts; port_index++ )
        {
            char* write_pos = fBuffer + pos;
            
            copy_size = sizeof ( JackMidiBuffer ) + fPortBuffer[port_index]->event_count * sizeof ( JackMidiEvent );
            memcpy ( fBuffer + pos, fPortBuffer[port_index], copy_size );
            pos += copy_size;
            memcpy ( fBuffer + pos, fPortBuffer[port_index] + ( fPortBuffer[port_index]->buffer_size - fPortBuffer[port_index]->write_pos ),
                     fPortBuffer[port_index]->write_pos );
            pos += fPortBuffer[port_index]->write_pos;
            
            JackMidiBuffer* midi_buffer = reinterpret_cast<JackMidiBuffer*>(write_pos);
            MidiBufferHToN(midi_buffer, midi_buffer);
        }
        return pos;
    }

    int NetMidiBuffer::RenderToJackPorts()
    {
        int pos = 0;
        int copy_size;
        for ( int port_index = 0; port_index < fNPorts; port_index++ )
        {
            JackMidiBuffer* midi_buffer = reinterpret_cast<JackMidiBuffer*>(fBuffer + pos);
            MidiBufferNToH(midi_buffer, midi_buffer);
            
            copy_size = sizeof ( JackMidiBuffer ) + reinterpret_cast<JackMidiBuffer*> ( fBuffer + pos )->event_count * sizeof ( JackMidiEvent );
            memcpy ( fPortBuffer[port_index], fBuffer + pos, copy_size );
            pos += copy_size;
            memcpy ( fPortBuffer[port_index] + ( fPortBuffer[port_index]->buffer_size - fPortBuffer[port_index]->write_pos ),
                     fBuffer + pos, fPortBuffer[port_index]->write_pos );
            pos += fPortBuffer[port_index]->write_pos;
        }
        return pos;
    }
    
    int NetMidiBuffer::RenderFromNetwork ( int subcycle, size_t copy_size )
    {
        memcpy ( fBuffer + subcycle * fMaxPcktSize, fNetBuffer, copy_size );
        return copy_size;
    }

    int NetMidiBuffer::RenderToNetwork ( int subcycle, size_t total_size )
    {
        int size = total_size - subcycle * fMaxPcktSize;
        int copy_size = ( size <= fMaxPcktSize ) ? size : fMaxPcktSize;
        memcpy ( fNetBuffer, fBuffer + subcycle * fMaxPcktSize, copy_size );
        return copy_size;
    }

// net audio buffer *********************************************************************************

    NetSingleAudioBuffer::NetSingleAudioBuffer ( session_params_t* params, uint32_t nports, char* net_buffer )
        : fPortBuffer(params, nports), fNetBuffer(net_buffer)
    {}

    NetSingleAudioBuffer::~NetSingleAudioBuffer()
    {}

    size_t NetSingleAudioBuffer::GetCycleSize()
    {
        return fPortBuffer.GetCycleSize();
    }

    void NetSingleAudioBuffer::SetBuffer ( int index, sample_t* buffer )
    {
        fPortBuffer.SetBuffer(index, buffer);
    }

    sample_t* NetSingleAudioBuffer::GetBuffer ( int index )
    {
        return fPortBuffer.GetBuffer(index);
    }

    int NetSingleAudioBuffer::RenderFromJackPorts ()
    {
        return fPortBuffer.RenderFromJackPorts();
    }

    int NetSingleAudioBuffer::RenderToJackPorts ()
    {
        return fPortBuffer.RenderToJackPorts();
    }
    
     //network<->buffer
    int NetSingleAudioBuffer::RenderFromNetwork ( int cycle,  int subcycle, size_t copy_size )
    {
        return fPortBuffer.RenderFromNetwork(fNetBuffer, cycle, subcycle, copy_size);
    }
    
    int NetSingleAudioBuffer::RenderToNetwork (int subcycle, size_t total_size )
    {
        return fPortBuffer.RenderToNetwork(fNetBuffer, subcycle, total_size);
    }
    
    // Celt audio buffer *********************************************************************************
    
#ifdef CELT

    #define KPS 32
    #define KPS_DIV 8

    NetCeltAudioBuffer::NetCeltAudioBuffer ( session_params_t* params, uint32_t nports, char* net_buffer )
        : fNetBuffer(net_buffer)
    {
        int res1, res2;
        jack_nframes_t period;
        
        fNPorts = nports;
        fPeriodSize = params->fPeriodSize;
        
        fCeltMode = new CELTMode *[fNPorts];
        fCeltEncoder = new CELTEncoder *[fNPorts];
        fCeltDecoder = new CELTDecoder *[fNPorts];
        
        memset(fCeltMode, 0, fNPorts * sizeof(CELTMode*));
        memset(fCeltEncoder, 0, fNPorts * sizeof(CELTEncoder*));
        memset(fCeltDecoder, 0, fNPorts * sizeof(CELTDecoder*));
        
        int error = CELT_OK;
        
        for (int i = 0; i < fNPorts; i++)  {
            fCeltMode[i] = celt_mode_create(params->fSampleRate, params->fPeriodSize, &error);
            if (error != CELT_OK)
                goto error;
            
            fCeltEncoder[i] = celt_encoder_create(fCeltMode[i], 1, &error);
            if (error != CELT_OK)
                goto error;
            celt_encoder_ctl(fCeltEncoder[i], CELT_SET_COMPLEXITY(0));
                
            fCeltDecoder[i] = celt_decoder_create(fCeltMode[i], 1, &error);
            if (error != CELT_OK)
                goto error;
            celt_decoder_ctl(fCeltDecoder[i], CELT_SET_COMPLEXITY(0));
        }
        
        fPortBuffer = new sample_t* [fNPorts];
        for (int port_index = 0; port_index < fNPorts; port_index++)
            fPortBuffer[port_index] = NULL;
         
        /*
        celt_int32 lookahead;
        celt_mode_info( celt_mode, CELT_GET_LOOKAHEAD, &lookahead );
        */
        
        //fCompressedSizeByte = (KPS * params->fPeriodSize * 1024 / params->fSampleRate / 8)&(~1);
        fCompressedSizeByte = (params->fPeriodSize * sizeof(sample_t)) / KPS_DIV;   // TODO
        
        fCompressedBuffer = new unsigned char* [fNPorts];
        for (int port_index = 0; port_index < fNPorts; port_index++)
            fCompressedBuffer[port_index] = new unsigned char[fCompressedSizeByte];
     
        jack_log("fCompressedSizeByte %d", fCompressedSizeByte);
        
        res1 = (fNPorts * fCompressedSizeByte) % (params->fMtu - sizeof(packet_header_t));
        res2 = (fNPorts * fCompressedSizeByte) / (params->fMtu - sizeof(packet_header_t));
        
        jack_log("res1 = %d res2 = %d", res1, res2);
         
        fNumPackets = (res1) ? (res2 + 1) : res2;
            
        fSubPeriodBytesSize = fCompressedSizeByte / fNumPackets;
        fLastSubPeriodBytesSize = fSubPeriodBytesSize + (fCompressedSizeByte - (fSubPeriodBytesSize * fNumPackets));
        
        jack_log("fNumPackets = %d fSubPeriodBytesSize = %d, fLastSubPeriodBytesSize = %d", fNumPackets, fSubPeriodBytesSize, fLastSubPeriodBytesSize);
        
        fCycleDuration = float(fSubPeriodBytesSize / sizeof(sample_t)) / float(params->fSampleRate);
        fCycleSize = params->fMtu * fNumPackets;
        
        fLastSubCycle = -1;
        return;
        
    error:
    
        FreeCelt();
        throw std::bad_alloc();
    }

    NetCeltAudioBuffer::~NetCeltAudioBuffer()
    {
        FreeCelt();
        
        for (int port_index = 0; port_index < fNPorts; port_index++)
            delete [] fCompressedBuffer[port_index];
            
        delete [] fCompressedBuffer;
        delete [] fPortBuffer;
    }
    
    void NetCeltAudioBuffer::FreeCelt()
    {
        for (int i = 0; i < fNPorts; i++)  {
            if (fCeltEncoder[i])
                celt_encoder_destroy(fCeltEncoder[i]);
            if (fCeltDecoder[i])
                celt_decoder_destroy(fCeltDecoder[i]);
            if (fCeltMode[i])
                celt_mode_destroy(fCeltMode[i]);
        }
         
        delete [] fCeltMode;
        delete [] fCeltEncoder;
        delete [] fCeltDecoder;
    }

    size_t NetCeltAudioBuffer::GetCycleSize()
    {
        return fCycleSize;
    }
    
    float NetCeltAudioBuffer::GetCycleDuration()
    {
        return fCycleDuration;
    }
    
    int NetCeltAudioBuffer::GetNumPackets()
    {
        return fNumPackets;
    }

    void NetCeltAudioBuffer::SetBuffer(int index, sample_t* buffer)
    {
        fPortBuffer[index] = buffer;
    }

    sample_t* NetCeltAudioBuffer::GetBuffer(int index)
    {
        return fPortBuffer[index];
    }

    int NetCeltAudioBuffer::RenderFromJackPorts()
    {
        float floatbuf[fPeriodSize];
        
        for (int port_index = 0; port_index < fNPorts; port_index++) {
            memcpy(floatbuf, fPortBuffer[port_index], fPeriodSize * sizeof(float));
            int res = celt_encode_float(fCeltEncoder[port_index], floatbuf, NULL, fCompressedBuffer[port_index], fCompressedSizeByte);
            if (res != fCompressedSizeByte) {
                jack_error("celt_encode_float error fCompressedSizeByte = %d  res = %d", fCompressedSizeByte, res);
            }
        }
        
        return fNPorts * fCompressedSizeByte;  // in bytes
    }

    int NetCeltAudioBuffer::RenderToJackPorts()
    {
        for (int port_index = 0; port_index < fNPorts; port_index++) {
            int res = celt_decode_float(fCeltDecoder[port_index], fCompressedBuffer[port_index], fCompressedSizeByte, fPortBuffer[port_index]);
            if (res != CELT_OK) {
                jack_error("celt_decode_float error res = %d", fCompressedSizeByte, res);
            }
        }
        
        fLastSubCycle = -1;
        //return fPeriodSize * sizeof(sample_t);  // in bytes; TODO
        return 0;
    }
    
    HardwareClock clock;
     //network<->buffer
    int NetCeltAudioBuffer::RenderFromNetwork(int cycle, int subcycle, size_t copy_size)
    {
        //clock.Update();
        
        if (subcycle == fNumPackets - 1) {
            for (int port_index = 0; port_index < fNPorts; port_index++)
                memcpy(fCompressedBuffer[port_index] + subcycle * fSubPeriodBytesSize, fNetBuffer + port_index * fSubPeriodBytesSize, fLastSubPeriodBytesSize);
        } else {
            for (int port_index = 0; port_index < fNPorts; port_index++)
                memcpy(fCompressedBuffer[port_index] + subcycle * fSubPeriodBytesSize, fNetBuffer + port_index * fSubPeriodBytesSize, fSubPeriodBytesSize);
        }
        
        if (subcycle != fLastSubCycle + 1) 
            jack_error("Packet(s) missing from... %d %d", fLastSubCycle, subcycle);
        
        fLastSubCycle = subcycle;
        
        //clock.Update();
		//const float dt = clock.GetDeltaTime();
		//printf("Delta: %f s\n", dt);
        
        return copy_size;
    }
    
    int NetCeltAudioBuffer::RenderToNetwork(int subcycle, size_t total_size)
    {
        if (subcycle == fNumPackets - 1) {
            for (int port_index = 0; port_index < fNPorts; port_index++)
                memcpy(fNetBuffer + port_index * fSubPeriodBytesSize, fCompressedBuffer[port_index] + subcycle * fSubPeriodBytesSize, fLastSubPeriodBytesSize);
        } else {
            for (int port_index = 0; port_index < fNPorts; port_index++)
                memcpy(fNetBuffer + port_index * fSubPeriodBytesSize, fCompressedBuffer[port_index] + subcycle * fSubPeriodBytesSize, fSubPeriodBytesSize);
        }
            
        return fNPorts * fSubPeriodBytesSize; 
    }

#endif

// Buffered

/*
    NetBufferedAudioBuffer::NetBufferedAudioBuffer ( session_params_t* params, uint32_t nports, char* net_buffer )
    {
        fMaxCycle = 0;
        fNetBuffer = net_buffer;
        
        for (int i = 0; i < AUDIO_BUFFER_SIZE; i++) {
            fPortBuffer[i].Init(params, nports);
        }
        
        fJackPortBuffer = new sample_t* [nports];
        for ( uint32_t port_index = 0; port_index < nports; port_index++ )
            fJackPortBuffer[port_index] = NULL;
    }

    NetBufferedAudioBuffer::~NetBufferedAudioBuffer()
    {
        delete [] fJackPortBuffer;
    }

    size_t NetBufferedAudioBuffer::GetCycleSize()
    {
        return fPortBuffer[0].GetCycleSize();
    }

    void NetBufferedAudioBuffer::SetBuffer ( int index, sample_t* buffer )
    {
        fJackPortBuffer[index] = buffer;
    }

    sample_t* NetBufferedAudioBuffer::GetBuffer ( int index )
    {
        return fJackPortBuffer[index];
    }
    
    void NetBufferedAudioBuffer::RenderFromJackPorts (int subcycle )
    {
        fPortBuffer[0].RenderFromJackPorts(fNetBuffer, subcycle);  // Always use first buffer...
    }

    void NetBufferedAudioBuffer::RenderToJackPorts (int cycle, int subcycle)
    {
        if (cycle < fMaxCycle) {
            jack_info("Wrong order fCycle %d subcycle %d fMaxCycle %d", cycle, subcycle, fMaxCycle);
        }
        fPortBuffer[cycle % AUDIO_BUFFER_SIZE].RenderToJackPorts(fNetBuffer, subcycle);
    }

    void NetBufferedAudioBuffer::FinishRenderToJackPorts (int cycle)
    {
        fMaxCycle = std::max(fMaxCycle, cycle);
        fPortBuffer[(cycle + 1) % AUDIO_BUFFER_SIZE].Copy(fJackPortBuffer);  // Copy internal buffer in JACK ports
    }
    */

// SessionParams ************************************************************************************

    SERVER_EXPORT void SessionParamsHToN ( session_params_t* src_params, session_params_t* dst_params )
    {
        memcpy(dst_params, src_params, sizeof(session_params_t));
        dst_params->fPacketID = htonl ( src_params->fPacketID );
        dst_params->fMtu = htonl ( src_params->fMtu );
        dst_params->fID = htonl ( src_params->fID );
        dst_params->fTransportSync = htonl ( src_params->fTransportSync );
        dst_params->fSendAudioChannels = htonl ( src_params->fSendAudioChannels );
        dst_params->fReturnAudioChannels = htonl ( src_params->fReturnAudioChannels );
        dst_params->fSendMidiChannels = htonl ( src_params->fSendMidiChannels );
        dst_params->fReturnMidiChannels = htonl ( src_params->fReturnMidiChannels );
        dst_params->fSampleRate = htonl ( src_params->fSampleRate );
        dst_params->fPeriodSize = htonl ( src_params->fPeriodSize );
        dst_params->fBitdepth = htonl ( src_params->fBitdepth );
        dst_params->fSlaveSyncMode = htonl ( src_params->fSlaveSyncMode );
    }

    SERVER_EXPORT void SessionParamsNToH (  session_params_t* src_params, session_params_t* dst_params )
    {
        memcpy(dst_params, src_params, sizeof(session_params_t));
        dst_params->fPacketID = ntohl ( src_params->fPacketID );
        dst_params->fMtu = ntohl ( src_params->fMtu );
        dst_params->fID = ntohl ( src_params->fID );
        dst_params->fTransportSync = ntohl ( src_params->fTransportSync );
        dst_params->fSendAudioChannels = ntohl ( src_params->fSendAudioChannels );
        dst_params->fReturnAudioChannels = ntohl ( src_params->fReturnAudioChannels );
        dst_params->fSendMidiChannels = ntohl ( src_params->fSendMidiChannels );
        dst_params->fReturnMidiChannels = ntohl ( src_params->fReturnMidiChannels );
        dst_params->fSampleRate = ntohl ( src_params->fSampleRate );
        dst_params->fPeriodSize = ntohl ( src_params->fPeriodSize );
        dst_params->fBitdepth = ntohl ( src_params->fBitdepth );
        dst_params->fSlaveSyncMode = ntohl ( src_params->fSlaveSyncMode );
    }

    SERVER_EXPORT void SessionParamsDisplay ( session_params_t* params )
    {
        char bitdepth[16];
        ( params->fBitdepth ) ? sprintf ( bitdepth, "%u", params->fBitdepth ) : sprintf ( bitdepth, "%s", "float" );
        char mode[8];
        switch ( params->fNetworkMode )
        {
            case 's' :
                strcpy ( mode, "slow" );
                break;
            case 'n' :
                strcpy ( mode, "normal" );
                break;
            case 'f' :
                strcpy ( mode, "fast" );
                break;
        }
        jack_info ( "**************** Network parameters ****************" );
        jack_info ( "Name : %s", params->fName );
        jack_info ( "Protocol revision : %d", params->fProtocolVersion );
        jack_info ( "MTU : %u", params->fMtu );
        jack_info ( "Master name : %s", params->fMasterNetName );
        jack_info ( "Slave name : %s", params->fSlaveNetName );
        jack_info ( "ID : %u", params->fID );
        jack_info ( "Transport Sync : %s", ( params->fTransportSync ) ? "yes" : "no" );
        jack_info ( "Send channels (audio - midi) : %d - %d", params->fSendAudioChannels, params->fSendMidiChannels );
        jack_info ( "Return channels (audio - midi) : %d - %d", params->fReturnAudioChannels, params->fReturnMidiChannels );
        jack_info ( "Sample rate : %u frames per second", params->fSampleRate );
        jack_info ( "Period size : %u frames per period", params->fPeriodSize );
        jack_info ( "Bitdepth : %s", bitdepth );
        jack_info ( "Slave mode : %s", ( params->fSlaveSyncMode ) ? "sync" : "async" );
        jack_info ( "Network mode : %s", mode );
        jack_info ( "****************************************************" );
    }

    SERVER_EXPORT sync_packet_type_t GetPacketType ( session_params_t* params )
    {
        switch ( params->fPacketID )
        {
            case 0:
                return SLAVE_AVAILABLE;
            case 1:
                return SLAVE_SETUP;
            case 2:
                return START_MASTER;
            case 3:
                return START_SLAVE;
            case 4:
                return KILL_MASTER;
        }
        return INVALID;
    }

    SERVER_EXPORT int SetPacketType ( session_params_t* params, sync_packet_type_t packet_type )
    {
        switch ( packet_type )
        {
            case INVALID:
                return -1;
            case SLAVE_AVAILABLE:
                params->fPacketID = 0;
                break;
            case SLAVE_SETUP:
                params->fPacketID = 1;
                break;
            case START_MASTER:
                params->fPacketID = 2;
                break;
            case START_SLAVE:
                params->fPacketID = 3;
                break;
            case KILL_MASTER:
                params->fPacketID = 4;
        }
        return 0;
    }

// Packet header **********************************************************************************

    SERVER_EXPORT void PacketHeaderHToN ( packet_header_t* src_header, packet_header_t* dst_header )
    {
        memcpy(dst_header, src_header, sizeof(packet_header_t));
        dst_header->fID = htonl ( src_header->fID );
        dst_header->fBitdepth = htonl ( src_header->fBitdepth );
        dst_header->fNumPacket = htonl ( src_header->fNumPacket );
        dst_header->fPacketSize = htonl ( src_header->fPacketSize );
        dst_header->fCycle = htonl ( src_header->fCycle );
        dst_header->fSubCycle = htonl ( src_header->fSubCycle );
        dst_header->fIsLastPckt = htonl ( src_header->fIsLastPckt );
    }

    SERVER_EXPORT void PacketHeaderNToH ( packet_header_t* src_header, packet_header_t* dst_header )
    {
        memcpy(dst_header, src_header, sizeof(packet_header_t));
        dst_header->fID = ntohl ( src_header->fID );
        dst_header->fBitdepth = ntohl ( src_header->fBitdepth );
        dst_header->fNumPacket = ntohl ( src_header->fNumPacket );
        dst_header->fPacketSize = ntohl ( src_header->fPacketSize );
        dst_header->fCycle = ntohl ( src_header->fCycle );
        dst_header->fSubCycle = ntohl ( src_header->fSubCycle );
        dst_header->fIsLastPckt = ntohl ( src_header->fIsLastPckt );
    }

    SERVER_EXPORT void PacketHeaderDisplay ( packet_header_t* header )
    {
        char bitdepth[16];
        ( header->fBitdepth ) ? sprintf ( bitdepth, "%u", header->fBitdepth ) : sprintf ( bitdepth, "%s", "float" );
        jack_info ( "********************Header********************" );
        jack_info ( "Data type : %c", header->fDataType );
        jack_info ( "Data stream : %c", header->fDataStream );
        jack_info ( "ID : %u", header->fID );
        jack_info ( "Cycle : %u", header->fCycle );
        jack_info ( "SubCycle : %u", header->fSubCycle );
        jack_info ( "Midi packets : %u", header->fNumPacket );
        jack_info ( "Last packet : '%s'", ( header->fIsLastPckt ) ? "yes" : "no" );
        jack_info ( "Bitdepth : %s", bitdepth );
        jack_info ( "**********************************************" );
    }
    
    SERVER_EXPORT void NetTransportDataDisplay ( net_transport_data_t* data )
    {
        jack_info ( "********************Network Transport********************" );
        jack_info ( "Transport new state : %u", data->fNewState );
        jack_info ( "Transport timebase master : %u", data->fTimebaseMaster );
        jack_info ( "Transport cycle state : %u", data->fState );
        jack_info ( "**********************************************" );
    }
   
    SERVER_EXPORT void MidiBufferHToN ( JackMidiBuffer* src_buffer, JackMidiBuffer* dst_buffer )
    {
        dst_buffer->magic = htonl(src_buffer->magic);
        dst_buffer->buffer_size = htonl(src_buffer->buffer_size);
        dst_buffer->nframes = htonl(src_buffer->nframes);
        dst_buffer->write_pos = htonl(src_buffer->write_pos);
        dst_buffer->event_count = htonl(src_buffer->event_count);
        dst_buffer->lost_events = htonl(src_buffer->lost_events);
        dst_buffer->mix_index = htonl(src_buffer->mix_index);
    }
    
    SERVER_EXPORT void MidiBufferNToH ( JackMidiBuffer* src_buffer, JackMidiBuffer* dst_buffer )
    {
        dst_buffer->magic = ntohl(src_buffer->magic);
        dst_buffer->buffer_size = ntohl(src_buffer->buffer_size);
        dst_buffer->nframes = ntohl(src_buffer->nframes);
        dst_buffer->write_pos = ntohl(src_buffer->write_pos);
        dst_buffer->event_count = ntohl(src_buffer->event_count);
        dst_buffer->lost_events = ntohl(src_buffer->lost_events);
        dst_buffer->mix_index = ntohl(src_buffer->mix_index);
    }
    
    SERVER_EXPORT void TransportDataHToN ( net_transport_data_t* src_params, net_transport_data_t* dst_params )
    {
        dst_params->fNewState = htonl(src_params->fNewState);
        dst_params->fTimebaseMaster = htonl(src_params->fTimebaseMaster);
        dst_params->fState = htonl(src_params->fState);
        dst_params->fPosition.unique_1 = htonll(src_params->fPosition.unique_1);
        dst_params->fPosition.usecs = htonl(src_params->fPosition.usecs);
        dst_params->fPosition.frame_rate = htonl(src_params->fPosition.frame_rate);
        dst_params->fPosition.frame = htonl(src_params->fPosition.frame);
        dst_params->fPosition.valid = (jack_position_bits_t)htonl((uint32_t)src_params->fPosition.valid);
        dst_params->fPosition.bar = htonl(src_params->fPosition.bar);
        dst_params->fPosition.beat = htonl(src_params->fPosition.beat);
        dst_params->fPosition.tick = htonl(src_params->fPosition.tick);
        dst_params->fPosition.bar_start_tick = htonll((uint64_t)src_params->fPosition.bar_start_tick);
        dst_params->fPosition.beats_per_bar = htonl((uint32_t)src_params->fPosition.beats_per_bar);
        dst_params->fPosition.beat_type = htonl((uint32_t)src_params->fPosition.beat_type);
        dst_params->fPosition.ticks_per_beat = htonll((uint64_t)src_params->fPosition.ticks_per_beat);
        dst_params->fPosition.beats_per_minute = htonll((uint64_t)src_params->fPosition.beats_per_minute);
        dst_params->fPosition.frame_time = htonll((uint64_t)src_params->fPosition.frame_time);
        dst_params->fPosition.next_time = htonll((uint64_t)src_params->fPosition.next_time);
        dst_params->fPosition.bbt_offset = htonl(src_params->fPosition.bbt_offset);
        dst_params->fPosition.audio_frames_per_video_frame = htonl((uint32_t)src_params->fPosition.audio_frames_per_video_frame);
        dst_params->fPosition.video_offset = htonl(src_params->fPosition.video_offset);
        dst_params->fPosition.unique_2 = htonll(src_params->fPosition.unique_2);
    }
    
    SERVER_EXPORT void TransportDataNToH ( net_transport_data_t* src_params, net_transport_data_t* dst_params )
    {
        dst_params->fNewState = ntohl(src_params->fNewState);
        dst_params->fTimebaseMaster =  ntohl(src_params->fTimebaseMaster);
        dst_params->fState = ntohl(src_params->fState);
        dst_params->fPosition.unique_1 = ntohll(src_params->fPosition.unique_1);
        dst_params->fPosition.usecs = ntohl(src_params->fPosition.usecs);
        dst_params->fPosition.frame_rate = ntohl(src_params->fPosition.frame_rate);
        dst_params->fPosition.frame = ntohl(src_params->fPosition.frame);
        dst_params->fPosition.valid = (jack_position_bits_t)ntohl((uint32_t)src_params->fPosition.valid);
        dst_params->fPosition.bar = ntohl(src_params->fPosition.bar);
        dst_params->fPosition.beat = ntohl(src_params->fPosition.beat);
        dst_params->fPosition.tick = ntohl(src_params->fPosition.tick);
        dst_params->fPosition.bar_start_tick = ntohll((uint64_t)src_params->fPosition.bar_start_tick);
        dst_params->fPosition.beats_per_bar = ntohl((uint32_t)src_params->fPosition.beats_per_bar);
        dst_params->fPosition.beat_type = ntohl((uint32_t)src_params->fPosition.beat_type);
        dst_params->fPosition.ticks_per_beat = ntohll((uint64_t)src_params->fPosition.ticks_per_beat);
        dst_params->fPosition.beats_per_minute = ntohll((uint64_t)src_params->fPosition.beats_per_minute);
        dst_params->fPosition.frame_time = ntohll((uint64_t)src_params->fPosition.frame_time);
        dst_params->fPosition.next_time = ntohll((uint64_t)src_params->fPosition.next_time);
        dst_params->fPosition.bbt_offset = ntohl(src_params->fPosition.bbt_offset);
        dst_params->fPosition.audio_frames_per_video_frame = ntohl((uint32_t)src_params->fPosition.audio_frames_per_video_frame);
        dst_params->fPosition.video_offset = ntohl(src_params->fPosition.video_offset);
        dst_params->fPosition.unique_2 = ntohll(src_params->fPosition.unique_2);
    }

// Utility *******************************************************************************************************

    SERVER_EXPORT int SocketAPIInit()
    {
#ifdef WIN32
        WORD wVersionRequested = MAKEWORD ( 2, 2 );
        WSADATA wsaData;

        if ( WSAStartup ( wVersionRequested, &wsaData ) != 0 )
        {
            jack_error ( "WSAStartup error : %s", strerror ( NET_ERROR_CODE ) );
            return -1;
        }

        if ( LOBYTE ( wsaData.wVersion ) != 2 || HIBYTE ( wsaData.wVersion ) != 2 )
        {
            jack_error ( "Could not find a useable version of Winsock.dll\n" );
            WSACleanup();
            return -1;
        }
#endif
        return 0;
    }

    SERVER_EXPORT int SocketAPIEnd()
    {
#ifdef WIN32
        return WSACleanup();
#endif
        return 0;
    }

    SERVER_EXPORT const char* GetTransportState ( int transport_state )
    {
        switch ( transport_state )
        {
            case JackTransportRolling:
                return "rolling";
            case JackTransportStarting:
                return "starting";
            case JackTransportStopped:
                return "stopped";
            case JackTransportNetStarting:
                return "netstarting";
        }
        return NULL;
    }
}