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jack2/common/JackNetDriver.cpp

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  1. /*

  2. Copyright (C) 2001 Paul Davis

  3. Copyright (C) 2008 Romain Moret at Grame

  4. 

  5. This program is free software; you can redistribute it and/or modify

  6. it under the terms of the GNU General Public License as published by

  7. the Free Software Foundation; either version 2 of the License, or

  8. (at your option) any later version.

  9. 

  10. This program is distributed in the hope that it will be useful,

  11. but WITHOUT ANY WARRANTY; without even the implied warranty of

  12. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  13. GNU General Public License for more details.

  14. 

  15. You should have received a copy of the GNU General Public License

  16. along with this program; if not, write to the Free Software

  17. Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

  18. 

  19. */

  20. 

  21. #include "JackNetDriver.h"

  22. #include "JackEngineControl.h"

  23. #include "JackClientControl.h"

  24. #include "JackGraphManager.h"

  25. #include "JackDriverLoader.h"

  26. #include "JackThreadedDriver.h"

  27. #include "JackWaitThreadedDriver.h"

  28. #include "JackException.h"

  29. 

  30. #define DEFAULT_MULTICAST_IP "225.3.19.154"

  31. #define DEFAULT_PORT 19000

  32. 

  33. using namespace std;

  34. 

  35. namespace Jack

  36. {

  37.     JackNetDriver::JackNetDriver ( const char* name, const char* alias, JackLockedEngine* engine, JackSynchro* table,

  38.                                    const char* ip, int port, int mtu, int midi_input_ports, int midi_output_ports,

  39.                                    const char* net_name, uint transport_sync, char network_mode )

  40.             : JackAudioDriver ( name, alias, engine, table ), JackNetSlaveInterface ( ip, port )

  41.     {

  42.         jack_log ( "JackNetDriver::JackNetDriver ip %s, port %d", ip, port );

  43. 

  44.         fMulticastIP = new char[strlen ( ip ) + 1];

  45.         strcpy ( fMulticastIP, ip );

  46.         fParams.fMtu = mtu;

  47.         fParams.fSendMidiChannels = midi_input_ports;

  48.         fParams.fReturnMidiChannels = midi_output_ports;

  49.         strcpy ( fParams.fName, net_name );

  50.         fSocket.GetName ( fParams.fSlaveNetName );

  51.         fParams.fTransportSync = transport_sync;

  52.         fParams.fNetworkMode = network_mode;

  53. #ifdef JACK_MONITOR

  54.         fNetTimeMon = NULL;

  55.         fCycleTimeMon = NULL;

  56. #endif

  57.     }

  58. 

  59.     JackNetDriver::~JackNetDriver()

  60.     {

  61.         fSocket.Close();

  62.         delete[] fMidiCapturePortList;

  63.         delete[] fMidiPlaybackPortList;

  64. #ifdef JACK_MONITOR

  65.         delete fNetTimeMon;

  66.         delete fCycleTimeMon;

  67. #endif

  68.     }

  69. 

  70. //*************************************initialization***********************************************************************

  71. 

  72.     int JackNetDriver::Open ( jack_nframes_t buffer_size, jack_nframes_t samplerate, bool capturing, bool playing,

  73.                               int inchannels, int outchannels, bool monitor,

  74.                               const char* capture_driver_name, const char* playback_driver_name,

  75.                               jack_nframes_t capture_latency, jack_nframes_t playback_latency )

  76.     {

  77.         int res = JackAudioDriver::Open ( buffer_size, samplerate, capturing, playing, inchannels, outchannels, monitor,

  78.                                           capture_driver_name, playback_driver_name, capture_latency, playback_latency );

  79.         fEngineControl->fPeriod = 0;

  80.         fEngineControl->fComputation = 500 * 1000;

  81.         fEngineControl->fConstraint = 500 * 1000;

  82.         return res;

  83.     }

  84. 

  85. #ifdef JACK_MONITOR

  86.     int JackNetDriver::Close()

  87.     {

  88.         if ( fNetTimeMon )

  89.             fNetTimeMon->Save();

  90.         if ( fCycleTimeMon )

  91.             fCycleTimeMon->Save();

  92.         return JackDriver::Close();

  93.     }

  94. #endif

  95. 

  96.     int JackNetDriver::Attach()

  97.     {

  98.         return 0;

  99.     }

  100. 

  101.     int JackNetDriver::Detach()

  102.     {

  103.         return 0;

  104.     }

  105. 

  106.     bool JackNetDriver::Init()

  107.     {

  108.         jack_log ( "JackNetDriver::Init()" );

  109. 

  110.         //new loading, but existing socket, restart the driver

  111.         if ( fSocket.IsSocket() )

  112.             Restart();

  113. 

  114.         //set the parameters to send

  115.         fParams.fSendAudioChannels = fCaptureChannels;

  116.         fParams.fReturnAudioChannels = fPlaybackChannels;

  117.         fParams.fSlaveSyncMode = fEngineControl->fSyncMode;

  118. 

  119.         //is transport sync ?

  120.         if ( fParams.fTransportSync )

  121.             jack_info ( "NetDriver started with Master's Transport Sync." );

  122. 

  123.         if ( !JackNetSlaveInterface::Init() )

  124.             return false;;

  125. 

  126.         //driver parametering

  127.         JackAudioDriver::SetBufferSize ( fParams.fPeriodSize );

  128.         JackAudioDriver::SetSampleRate ( fParams.fSampleRate );

  129. 

  130.         JackDriver::NotifyBufferSize ( fParams.fPeriodSize );

  131.         JackDriver::NotifySampleRate ( fParams.fSampleRate );

  132. 

  133.         //allocate midi ports lists

  134.         fMidiCapturePortList = new jack_port_id_t [fParams.fSendMidiChannels];

  135.         fMidiPlaybackPortList = new jack_port_id_t [fParams.fReturnMidiChannels];

  136. 

  137.         //monitor

  138. #ifdef JACK_MONITOR

  139.         string plot_name;

  140.         //NetTimeMon

  141.         plot_name = string ( fParams.fName );

  142.         plot_name += string ( "_slave" );

  143.         plot_name += ( fEngineControl->fSyncMode ) ? string ( "_sync" ) : string ( "_async" );

  144.         plot_name += ( fParams.fNetworkMode == 'f' ) ? string ( "_fast" ) : string ( "_normal" );

  145.         fNetTimeMon = new JackGnuPlotMonitor<float> ( 128, 4, plot_name );

  146.         string net_time_mon_fields[] =

  147.         {

  148.             string ( "end of read" ),

  149.             string ( "start of write" ),

  150.             string ( "sync send" ),

  151.             string ( "end of write" )

  152.         };

  153.         string net_time_mon_options[] =

  154.         {

  155.             string ( "set xlabel \"audio cycles\"" ),

  156.             string ( "set ylabel \"% of audio cycle\"" )

  157.         };

  158.         fNetTimeMon->SetPlotFile ( net_time_mon_options, 2, net_time_mon_fields, 4 );

  159.         //CycleTimeMon

  160.         plot_name.clear();

  161.         plot_name = string ( fParams.fName );

  162.         plot_name += string ( "_slave_cycle_duration" );

  163.         plot_name += ( fEngineControl->fSyncMode ) ? string ( "_sync" ) : string ( "_async" );

  164.         plot_name += ( fParams.fNetworkMode == 'f' ) ? string ( "_fast" ) : string ( "_normal" );

  165.         fCycleTimeMon = new JackGnuPlotMonitor<jack_time_t> ( 2048, 1, plot_name );

  166.         string cycle_time_mon_field = string ( "cycle duration" );

  167.         string cycle_time_mon_options[] =

  168.         {

  169.             string ( "set xlabel \"audio cycles\"" ),

  170.             string ( "set ylabel \"usecs\"" )

  171.         };

  172.         fCycleTimeMon->SetPlotFile ( cycle_time_mon_options, 2, &cycle_time_mon_field, 1 );

  173.         fLastCycleBeginDate = GetMicroSeconds();

  174. #endif

  175. 

  176.         if ( SetParams() )

  177.         {

  178.             jack_error ( "Fatal error : can't alloc net driver ports." );

  179.             return false;

  180.         }

  181. 

  182.         //init done, display parameters

  183.         SessionParamsDisplay ( &fParams );

  184. 

  185.         return true;

  186.     }

  187. 

  188.     void JackNetDriver::Restart()

  189.     {

  190.         jack_log ( "JackNetDriver::Restart" );

  191.         jack_info ( "Restarting driver..." );

  192.         delete[] fTxBuffer;

  193.         fTxBuffer = NULL;

  194.         delete[] fRxBuffer;

  195.         fRxBuffer = NULL;

  196.         delete fNetAudioCaptureBuffer;

  197.         fNetAudioCaptureBuffer = NULL;

  198.         delete fNetAudioPlaybackBuffer;

  199.         fNetAudioPlaybackBuffer = NULL;

  200.         delete fNetMidiCaptureBuffer;

  201.         fNetMidiCaptureBuffer = NULL;

  202.         delete fNetMidiPlaybackBuffer;

  203.         fNetMidiPlaybackBuffer = NULL;

  204.         FreePorts();

  205.         delete[] fMidiCapturePortList;

  206.         fMidiCapturePortList = NULL;

  207.         delete[] fMidiPlaybackPortList;

  208.         fMidiPlaybackPortList = NULL;

  209. #ifdef JACK_MONITOR

  210.         delete fNetTimeMon;

  211.         fNetTimeMon = NULL;

  212.         delete fCycleTimeMon;

  213.         fCycleTimeMon = NULL;

  214. #endif

  215.     }

  216. 

  217.     int JackNetDriver::AllocPorts()

  218.     {

  219.         jack_log ( "JackNetDriver::AllocPorts fBufferSize = %ld fSampleRate = %ld", fEngineControl->fBufferSize, fEngineControl->fSampleRate );

  220.         JackPort* port;

  221.         jack_port_id_t port_id;

  222.         char name[JACK_CLIENT_NAME_SIZE + JACK_PORT_NAME_SIZE];

  223.         char alias[JACK_CLIENT_NAME_SIZE + JACK_PORT_NAME_SIZE];

  224.         unsigned long port_flags;

  225.         int audio_port_index;

  226.         uint midi_port_index;

  227. 

  228.         //audio

  229.         port_flags = JackPortIsOutput | JackPortIsPhysical | JackPortIsTerminal;

  230.         for ( audio_port_index = 0; audio_port_index < fCaptureChannels; audio_port_index++ )

  231.         {

  232.             snprintf ( alias, sizeof ( alias ) - 1, "%s:%s:out%d", fAliasName, fCaptureDriverName, audio_port_index + 1 );

  233.             snprintf ( name, sizeof ( name ) - 1, "%s:capture_%d", fClientControl.fName, audio_port_index + 1 );

  234.             if ( ( port_id = fGraphManager->AllocatePort ( fClientControl.fRefNum, name, JACK_DEFAULT_AUDIO_TYPE,

  235.                              static_cast<JackPortFlags> ( port_flags ), fEngineControl->fBufferSize ) ) == NO_PORT )

  236.             {

  237.                 jack_error ( "driver: cannot register port for %s", name );

  238.                 return -1;

  239.             }

  240.             port = fGraphManager->GetPort ( port_id );

  241.             port->SetAlias ( alias );

  242.             port->SetLatency ( fEngineControl->fBufferSize );

  243.             fCapturePortList[audio_port_index] = port_id;

  244.             jack_log ( "JackNetDriver::AllocPorts() fCapturePortList[%d] audio_port_index = %ld fPortLatency = %ld", audio_port_index, port_id, port->GetLatency() );

  245.         }

  246.         port_flags = JackPortIsInput | JackPortIsPhysical | JackPortIsTerminal;

  247.         for ( audio_port_index = 0; audio_port_index < fPlaybackChannels; audio_port_index++ )

  248.         {

  249.             snprintf ( alias, sizeof ( alias ) - 1, "%s:%s:in%d", fAliasName, fPlaybackDriverName, audio_port_index + 1 );

  250.             snprintf ( name, sizeof ( name ) - 1, "%s:playback_%d",fClientControl.fName, audio_port_index + 1 );

  251.             if ( ( port_id = fGraphManager->AllocatePort ( fClientControl.fRefNum, name, JACK_DEFAULT_AUDIO_TYPE,

  252.                              static_cast<JackPortFlags> ( port_flags ), fEngineControl->fBufferSize ) ) == NO_PORT )

  253.             {

  254.                 jack_error ( "driver: cannot register port for %s", name );

  255.                 return -1;

  256.             }

  257.             port = fGraphManager->GetPort ( port_id );

  258.             port->SetAlias ( alias );

  259.             port->SetLatency ( ( fParams.fNetworkMode == 'f' ) ? 0 : fEngineControl->fBufferSize + ( ( fEngineControl->fSyncMode ) ? 0 : fEngineControl->fBufferSize ) );

  260.             fPlaybackPortList[audio_port_index] = port_id;

  261.             jack_log ( "JackNetDriver::AllocPorts() fPlaybackPortList[%d] audio_port_index = %ld fPortLatency = %ld", audio_port_index, port_id, port->GetLatency() );

  262.         }

  263.         //midi

  264.         port_flags = JackPortIsOutput | JackPortIsPhysical | JackPortIsTerminal;

  265.         for ( midi_port_index = 0; midi_port_index < fParams.fSendMidiChannels; midi_port_index++ )

  266.         {

  267.             snprintf ( alias, sizeof ( alias ) - 1, "%s:%s:out%d", fAliasName, fCaptureDriverName, midi_port_index + 1 );

  268.             snprintf ( name, sizeof ( name ) - 1, "%s:midi_capture_%d", fClientControl.fName, midi_port_index + 1 );

  269.             if ( ( port_id = fGraphManager->AllocatePort ( fClientControl.fRefNum, name, JACK_DEFAULT_MIDI_TYPE,

  270.                              static_cast<JackPortFlags> ( port_flags ), fEngineControl->fBufferSize ) ) == NO_PORT )

  271.             {

  272.                 jack_error ( "driver: cannot register port for %s", name );

  273.                 return -1;

  274.             }

  275.             port = fGraphManager->GetPort ( port_id );

  276.             port->SetLatency ( fEngineControl->fBufferSize );

  277.             fMidiCapturePortList[midi_port_index] = port_id;

  278.             jack_log ( "JackNetDriver::AllocPorts() fMidiCapturePortList[%d] midi_port_index = %ld fPortLatency = %ld", midi_port_index, port_id, port->GetLatency() );

  279.         }

  280. 

  281.         port_flags = JackPortIsInput | JackPortIsPhysical | JackPortIsTerminal;

  282.         for ( midi_port_index = 0; midi_port_index < fParams.fReturnMidiChannels; midi_port_index++ )

  283.         {

  284.             snprintf ( alias, sizeof ( alias ) - 1, "%s:%s:in%d", fAliasName, fPlaybackDriverName, midi_port_index + 1 );

  285.             snprintf ( name, sizeof ( name ) - 1, "%s:midi_playback_%d", fClientControl.fName, midi_port_index + 1 );

  286.             if ( ( port_id = fGraphManager->AllocatePort ( fClientControl.fRefNum, name, JACK_DEFAULT_MIDI_TYPE,

  287.                              static_cast<JackPortFlags> ( port_flags ), fEngineControl->fBufferSize ) ) == NO_PORT )

  288.             {

  289.                 jack_error ( "driver: cannot register port for %s", name );

  290.                 return -1;

  291.             }

  292.             port = fGraphManager->GetPort ( port_id );

  293.             port->SetLatency ( ( fParams.fNetworkMode == 'f' ) ? 0 : fEngineControl->fBufferSize + ( ( fEngineControl->fSyncMode ) ? 0 : fEngineControl->fBufferSize ) );

  294.             fMidiPlaybackPortList[midi_port_index] = port_id;

  295.             jack_log ( "JackNetDriver::AllocPorts() fMidiPlaybackPortList[%d] midi_port_index = %ld fPortLatency = %ld", midi_port_index, port_id, port->GetLatency() );

  296.         }

  297. 

  298.         return 0;

  299.     }

  300. 

  301.     int JackNetDriver::FreePorts()

  302.     {

  303.         jack_log ( "JackNetDriver::FreePorts" );

  304.         int audio_port_index;

  305.         uint midi_port_index;

  306.         for ( audio_port_index = 0; audio_port_index < fCaptureChannels; audio_port_index++ )

  307.             fGraphManager->ReleasePort ( fClientControl.fRefNum, fCapturePortList[audio_port_index] );

  308.         for ( audio_port_index = 0; audio_port_index < fPlaybackChannels; audio_port_index++ )

  309.             fGraphManager->ReleasePort ( fClientControl.fRefNum, fPlaybackPortList[audio_port_index] );

  310.         for ( midi_port_index = 0; midi_port_index < fParams.fSendMidiChannels; midi_port_index++ )

  311.             fGraphManager->ReleasePort ( fClientControl.fRefNum, fMidiCapturePortList[midi_port_index] );

  312.         for ( midi_port_index = 0; midi_port_index < fParams.fReturnMidiChannels; midi_port_index++ )

  313.             fGraphManager->ReleasePort ( fClientControl.fRefNum, fMidiPlaybackPortList[midi_port_index] );

  314.         return 0;

  315.     }

  316. 

  317.     JackMidiBuffer* JackNetDriver::GetMidiInputBuffer ( int port_index )

  318.     {

  319.         return static_cast<JackMidiBuffer*> ( fGraphManager->GetBuffer ( fMidiCapturePortList[port_index], fEngineControl->fBufferSize ) );

  320.     }

  321. 

  322.     JackMidiBuffer* JackNetDriver::GetMidiOutputBuffer ( int port_index )

  323.     {

  324.         return static_cast<JackMidiBuffer*> ( fGraphManager->GetBuffer ( fMidiPlaybackPortList[port_index], fEngineControl->fBufferSize ) );

  325.     }

  326. 

  327.     int JackNetDriver::SetSyncPacket()

  328.     {

  329.         if ( fParams.fTransportSync )

  330.         {

  331.             //set the TransportData

  332. 

  333.             //copy to TxBuffer

  334.             memcpy ( fTxData, &fTransportData, sizeof ( net_transport_data_t ) );

  335.         }

  336.         return 0;

  337.     }

  338. 

  339. //*************************************process************************************************************************

  340. 

  341.     int JackNetDriver::Read()

  342.     {

  343.         uint midi_port_index;

  344.         int audio_port_index;

  345. 

  346.         //buffers

  347.         for ( midi_port_index = 0; midi_port_index < fParams.fSendMidiChannels; midi_port_index++ )

  348.             fNetMidiCaptureBuffer->SetBuffer ( midi_port_index, GetMidiInputBuffer ( midi_port_index ) );

  349.         for ( audio_port_index = 0; audio_port_index < fCaptureChannels; audio_port_index++ )

  350.             fNetAudioCaptureBuffer->SetBuffer ( audio_port_index, GetInputBuffer ( audio_port_index ) );

  351. 

  352. #ifdef JACK_MONITOR

  353.         fNetTimeMon->New();

  354. #endif

  355. 

  356.         //receive sync (launch the cycle)

  357.         if ( SyncRecv() == SOCKET_ERROR )

  358.             return 0;

  359. 

  360.         //take the time at the beginning of the cycle

  361.         JackDriver::CycleTakeBeginTime();

  362. 

  363. #ifdef JACK_MONITOR

  364.         fCycleTimeMon->AddNew ( JackDriver::fBeginDateUst - fLastCycleBeginDate );

  365.         fCycleTimeMon->Write();

  366.         fLastCycleBeginDate = JackDriver::fBeginDateUst;

  367. #endif

  368. 

  369.         //audio, midi or sync if driver is late

  370.         if ( DataRecv() == SOCKET_ERROR )

  371.             return SOCKET_ERROR;

  372. 

  373. #ifdef JACK_MONITOR

  374.         fNetTimeMon->Add ( ( ( float ) ( GetMicroSeconds() - JackDriver::fBeginDateUst ) / ( float ) fEngineControl->fPeriodUsecs ) * 100.f );

  375. #endif

  376. 

  377.         return 0;

  378.     }

  379. 

  380.     int JackNetDriver::Write()

  381.     {

  382.         uint midi_port_index;

  383.         int audio_port_index;

  384. 

  385.         //buffers

  386.         for ( midi_port_index = 0; midi_port_index < fParams.fReturnMidiChannels; midi_port_index++ )

  387.             fNetMidiPlaybackBuffer->SetBuffer ( midi_port_index, GetMidiOutputBuffer ( midi_port_index ) );

  388.         for ( audio_port_index = 0; audio_port_index < fPlaybackChannels; audio_port_index++ )

  389.             fNetAudioPlaybackBuffer->SetBuffer ( audio_port_index, GetOutputBuffer ( audio_port_index ) );

  390. 

  391. #ifdef JACK_MONITOR

  392.         fNetTimeMon->Add ( ( ( float ) ( GetMicroSeconds() - JackDriver::fBeginDateUst ) / ( float ) fEngineControl->fPeriodUsecs ) * 100.f );

  393. #endif

  394. 

  395.         //sync

  396.         memset ( fTxData, 0, fPayloadSize );

  397.         SetSyncPacket();

  398. 

  399.         if ( SyncSend() == SOCKET_ERROR )

  400.             return SOCKET_ERROR;

  401. 

  402. #ifdef JACK_MONITOR

  403.         fNetTimeMon->Add ( ( ( float ) ( GetMicroSeconds() - JackDriver::fBeginDateUst ) / ( float ) fEngineControl->fPeriodUsecs ) * 100.f );

  404. #endif

  405. 

  406.         if ( DataSend() == SOCKET_ERROR )

  407.             return SOCKET_ERROR;

  408. 

  409. #ifdef JACK_MONITOR

  410.         fNetTimeMon->AddLast ( ( ( float ) ( GetMicroSeconds() - JackDriver::fBeginDateUst ) / ( float ) fEngineControl->fPeriodUsecs ) * 100.f );

  411. #endif

  412. 

  413.         return 0;

  414.     }

  415. 

  416. //*************************************loader*******************************************************

  417. 

  418. #ifdef __cplusplus

  419.     extern "C"

  420.     {

  421. #endif

  422.         EXPORT jack_driver_desc_t* driver_get_descriptor ()

  423.         {

  424.             jack_driver_desc_t* desc = ( jack_driver_desc_t* ) calloc ( 1, sizeof ( jack_driver_desc_t ) );

  425.             strcpy ( desc->name, "net" );

  426.             desc->nparams = 10;

  427.             desc->params = ( jack_driver_param_desc_t* ) calloc ( desc->nparams, sizeof ( jack_driver_param_desc_t ) );

  428. 

  429.             int i = 0;

  430.             strcpy ( desc->params[i].name, "multicast_ip" );

  431.             desc->params[i].character = 'a';

  432.             desc->params[i].type = JackDriverParamString;

  433.             strcpy ( desc->params[i].value.str, DEFAULT_MULTICAST_IP );

  434.             strcpy ( desc->params[i].short_desc, "Multicast Address" );

  435.             strcpy ( desc->params[i].long_desc, desc->params[i].short_desc );

  436. 

  437.             i++;

  438.             strcpy ( desc->params[i].name, "udp_net_port" );

  439.             desc->params[i].character = 'p';

  440.             desc->params[i].type = JackDriverParamInt;

  441.             desc->params[i].value.i = 19000;

  442.             strcpy ( desc->params[i].short_desc, "UDP port" );

  443.             strcpy ( desc->params[i].long_desc, desc->params[i].short_desc );

  444. 

  445.             i++;

  446.             strcpy ( desc->params[i].name, "mtu" );

  447.             desc->params[i].character = 'M';

  448.             desc->params[i].type = JackDriverParamInt;

  449.             desc->params[i].value.i = 1500;

  450.             strcpy ( desc->params[i].short_desc, "MTU to the master" );

  451.             strcpy ( desc->params[i].long_desc, desc->params[i].short_desc );

  452. 

  453.             i++;

  454.             strcpy ( desc->params[i].name, "input_ports" );

  455.             desc->params[i].character = 'C';

  456.             desc->params[i].type = JackDriverParamInt;

  457.             desc->params[i].value.i = 2;

  458.             strcpy ( desc->params[i].short_desc, "Number of audio input ports" );

  459.             strcpy ( desc->params[i].long_desc, desc->params[i].short_desc );

  460. 

  461.             i++;

  462.             strcpy ( desc->params[i].name, "output_ports" );

  463.             desc->params[i].character = 'P';

  464.             desc->params[i].type = JackDriverParamInt;

  465.             desc->params[i].value.i = 2;

  466.             strcpy ( desc->params[i].short_desc, "Number of audio output ports" );

  467.             strcpy ( desc->params[i].long_desc, desc->params[i].short_desc );

  468. 

  469.             i++;

  470.             strcpy ( desc->params[i].name, "midi_in_ports" );

  471.             desc->params[i].character = 'i';

  472.             desc->params[i].type = JackDriverParamInt;

  473.             desc->params[i].value.i = 0;

  474.             strcpy ( desc->params[i].short_desc, "Number of midi input ports" );

  475.             strcpy ( desc->params[i].long_desc, desc->params[i].short_desc );

  476. 

  477.             i++;

  478.             strcpy ( desc->params[i].name, "midi_out_ports" );

  479.             desc->params[i].character = 'o';

  480.             desc->params[i].type = JackDriverParamUInt;

  481.             desc->params[i].value.i = 0;

  482.             strcpy ( desc->params[i].short_desc, "Number of midi output ports" );

  483.             strcpy ( desc->params[i].long_desc, desc->params[i].short_desc );

  484. 

  485.             i++;

  486.             strcpy ( desc->params[i].name, "client_name" );

  487.             desc->params[i].character = 'n';

  488.             desc->params[i].type = JackDriverParamString;

  489.             strcpy ( desc->params[i].value.str, "'hostname'" );

  490.             strcpy ( desc->params[i].short_desc, "Name of the jack client" );

  491.             strcpy ( desc->params[i].long_desc, desc->params[i].short_desc );

  492. 

  493.             i++;

  494.             strcpy ( desc->params[i].name, "transport_sync" );

  495.             desc->params[i].character  = 't';

  496.             desc->params[i].type = JackDriverParamUInt;

  497.             desc->params[i].value.ui = 1U;

  498.             strcpy ( desc->params[i].short_desc, "Sync transport with master's" );

  499.             strcpy ( desc->params[i].long_desc, desc->params[i].short_desc );

  500. 

  501.             i++;

  502.             strcpy ( desc->params[i].name, "fast_mode" );

  503.             desc->params[i].character  = 'f';

  504.             desc->params[i].type = JackDriverParamString;

  505.             strcpy ( desc->params[i].value.str, "" );

  506.             strcpy ( desc->params[i].short_desc, "Fast mode allows a zero latency transmission." );

  507.             strcpy ( desc->params[i].long_desc, desc->params[i].short_desc );

  508. 

  509.             return desc;

  510.         }

  511. 

  512.         EXPORT Jack::JackDriverClientInterface* driver_initialize ( Jack::JackLockedEngine* engine, Jack::JackSynchro* table, const JSList* params )

  513.         {

  514.             if ( SocketAPIInit() < 0 )

  515.             {

  516.                 jack_error ( "Can't init Socket API, exiting..." );

  517.                 return NULL;

  518.             }

  519.             const char* multicast_ip = DEFAULT_MULTICAST_IP;

  520.             char name[JACK_CLIENT_NAME_SIZE];

  521.             GetHostName ( name, JACK_CLIENT_NAME_SIZE );

  522.             int udp_port = DEFAULT_PORT;

  523.             int mtu = 1500;

  524.             uint transport_sync = 1;

  525.             jack_nframes_t period_size = 128;

  526.             jack_nframes_t sample_rate = 48000;

  527.             int audio_capture_ports = 2;

  528.             int audio_playback_ports = 2;

  529.             int midi_input_ports = 0;

  530.             int midi_output_ports = 0;

  531.             bool monitor = false;

  532.             char network_mode = 'n';

  533. 

  534.             const JSList* node;

  535.             const jack_driver_param_t* param;

  536.             for ( node = params; node; node = jack_slist_next ( node ) )

  537.             {

  538.                 param = ( const jack_driver_param_t* ) node->data;

  539.                 switch ( param->character )

  540.                 {

  541.                     case 'a' :

  542.                         multicast_ip = strdup ( param->value.str );

  543.                         break;

  544.                     case 'p':

  545.                         udp_port = param->value.ui;

  546.                         break;

  547.                     case 'M':

  548.                         mtu = param->value.i;

  549.                         break;

  550.                     case 'C':

  551.                         audio_capture_ports = param->value.i;

  552.                         break;

  553.                     case 'P':

  554.                         audio_playback_ports = param->value.i;

  555.                         break;

  556.                     case 'i':

  557.                         midi_input_ports = param->value.i;

  558.                         break;

  559.                     case 'o':

  560.                         midi_output_ports = param->value.i;

  561.                         break;

  562.                     case 'n' :

  563.                         strncpy ( name, param->value.str, JACK_CLIENT_NAME_SIZE );

  564.                         break;

  565.                     case 't' :

  566.                         transport_sync = param->value.ui;

  567.                         break;

  568.                     case 'f' :

  569.                         network_mode = 'f';

  570.                         break;

  571.                 }

  572.             }

  573. 

  574.             Jack::JackDriverClientInterface* driver = new Jack::JackWaitThreadedDriver (

  575.                 new Jack::JackNetDriver ( "system", "net_pcm", engine, table, multicast_ip, udp_port, mtu,

  576.                                           midi_input_ports, midi_output_ports, name, transport_sync, network_mode ) );

  577.             if ( driver->Open ( period_size, sample_rate, 1, 1, audio_capture_ports, audio_playback_ports,

  578.                                 monitor, "from_master_", "to_master_", 0, 0 ) == 0 )

  579.                 return driver;

  580. 

  581.             delete driver;

  582.             return NULL;

  583.         }

  584. 

  585. #ifdef __cplusplus

  586.     }

  587. #endif

  588. }