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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. #ifdef JACK_MONITOR

  38.     uint JackNetDriver::fMeasureCnt = 64;

  39.     uint JackNetDriver::fMeasurePoints = 5;

  40.     uint JackNetDriver::fMonitorPlotOptionsCnt = 2;

  41.     string JackNetDriver::fMonitorPlotOptions[] =

  42.     {

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

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

  45.     };

  46.     string JackNetDriver::fMonitorFieldNames[] =

  47.     {

  48.         string ( "cyclestart" ),

  49.         string ( "read end" ),

  50.         string ( "write start" ),

  51.         string ( "sync send" ),

  52.         string ( "send end" )

  53.     };

  54. #endif

  55. 

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

  57.                                    const char* ip, int port, int mtu, int midi_input_ports, int midi_output_ports, const char* net_name, uint transport_sync )

  58.             : JackAudioDriver ( name, alias, engine, table ), fSocket ( ip, port )

  59.     {

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

  61. 

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

  63.         strcpy ( fMulticastIP, ip );

  64.         fParams.fMtu = mtu;

  65.         fParams.fSendMidiChannels = midi_input_ports;

  66.         fParams.fReturnMidiChannels = midi_output_ports;

  67.         strcpy ( fParams.fName, net_name );

  68.         fSocket.GetName ( fParams.fSlaveNetName );

  69.         fParams.fTransportSync = transport_sync;

  70.     }

  71. 

  72.     JackNetDriver::~JackNetDriver()

  73.     {

  74.         fSocket.Close();

  75.         SocketAPIEnd();

  76.         delete fNetAudioCaptureBuffer;

  77.         delete fNetAudioPlaybackBuffer;

  78.         delete fNetMidiCaptureBuffer;

  79.         delete fNetMidiPlaybackBuffer;

  80.         delete[] fTxBuffer;

  81.         delete[] fRxBuffer;

  82.         delete[] fMulticastIP;

  83.         delete[] fMidiCapturePortList;

  84.         delete[] fMidiPlaybackPortList;

  85. #ifdef JACK_MONITOR

  86.         fMonitor->Save();

  87. 		delete[] fMeasure;

  88. 		delete fMonitor;

  89. #endif

  90.     }

  91. 

  92. //*************************************initialization***********************************************************************

  93. 

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

  95.                               int inchannels, int outchannels, bool monitor,

  96.                               const char* capture_driver_name, const char* playback_driver_name,

  97.                               jack_nframes_t capture_latency, jack_nframes_t playback_latency )

  98.     {

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

  100.                                           capture_driver_name, playback_driver_name, capture_latency, playback_latency );

  101.         fEngineControl->fPeriod = 0;

  102.         fEngineControl->fComputation = 500 * 1000;

  103.         fEngineControl->fConstraint = 500 * 1000;

  104.         return res;

  105.     }

  106. 

  107.     int JackNetDriver::Attach()

  108.     {

  109.         return 0;

  110.     }

  111. 

  112.     int JackNetDriver::Detach()

  113.     {

  114.         return 0;

  115.     }

  116. 

  117.     bool JackNetDriver::Init()

  118.     {

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

  120. 

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

  122.         if ( fSocket.IsSocket() )

  123.             Restart();

  124. 

  125.         //set the parameters to send

  126.         strcpy ( fParams.fPacketType, "params" );

  127.         fParams.fProtocolVersion = 'a';

  128.         SetPacketType ( &fParams, SLAVE_AVAILABLE );

  129.         fParams.fSendAudioChannels = fCaptureChannels;

  130.         fParams.fReturnAudioChannels = fPlaybackChannels;

  131. 

  132.         //is transport sync ?

  133.         if ( fParams.fTransportSync )

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

  135. 

  136.         //init loop : get a master and start, do it until connection is ok

  137.         net_status_t status;

  138.         do

  139.         {

  140.             //first, get a master, do it until a valid connection is running

  141.             jack_info ( "Initializing Net Driver..." );

  142.             do

  143.             {

  144.                 status = GetNetMaster();

  145.                 if ( status == NET_SOCKET_ERROR )

  146.                     return false;

  147.             }

  148.             while ( status != NET_CONNECTED );

  149. 

  150.             //then tell the master we are ready

  151.             jack_info ( "Initializing connection with %s...", fParams.fMasterNetName );

  152.             status = SendMasterStartSync();

  153.             if ( status == NET_ERROR )

  154.                 return false;

  155.         }

  156.         while ( status != NET_ROLLING );

  157. 

  158.         //driver parametering

  159.         if ( SetParams() )

  160.         {

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

  162.             return false;

  163.         }

  164. 

  165.         //init done, display parameters

  166.         SessionParamsDisplay ( &fParams );

  167. 

  168.         return true;

  169.     }

  170. 

  171.     net_status_t JackNetDriver::GetNetMaster()

  172.     {

  173.         jack_log ( "JackNetDriver::GetNetMaster()" );

  174.         //utility

  175.         session_params_t params;

  176.         int ms_timeout = 2000;

  177.         int rx_bytes = 0;

  178. 

  179.         //socket

  180.         if ( fSocket.NewSocket() == SOCKET_ERROR )

  181.         {

  182.             jack_error ( "Fatal error : network unreachable - %s", StrError ( NET_ERROR_CODE ) );

  183.             return NET_SOCKET_ERROR;

  184.         }

  185. 

  186.         //bind the socket

  187.         if ( fSocket.Bind() == SOCKET_ERROR )

  188.             jack_error ( "Can't bind the socket : %s", StrError ( NET_ERROR_CODE ) );

  189. 

  190.         //timeout on receive

  191.         if ( fSocket.SetTimeOut ( ms_timeout ) == SOCKET_ERROR )

  192.             jack_error ( "Can't set timeout : %s", StrError ( NET_ERROR_CODE ) );

  193. 

  194.         //send 'AVAILABLE' until 'SLAVE_SETUP' received

  195.         jack_info ( "Waiting for a master..." );

  196.         do

  197.         {

  198.             //send 'available'

  199.             if ( fSocket.SendTo ( &fParams, sizeof ( session_params_t ), 0, fMulticastIP ) == SOCKET_ERROR )

  200.                 jack_error ( "Error in data send : %s", StrError ( NET_ERROR_CODE ) );

  201.             //filter incoming packets : don't exit while receiving wrong packets

  202.             do

  203.             {

  204.                 rx_bytes = fSocket.CatchHost ( &params, sizeof ( session_params_t ), 0 );

  205.                 if ( ( rx_bytes == SOCKET_ERROR ) && ( fSocket.GetError() != NET_NO_DATA ) )

  206.                 {

  207.                     jack_error ( "Can't receive : %s", StrError ( NET_ERROR_CODE ) );

  208.                     return NET_RECV_ERROR;

  209.                 }

  210.             }

  211.             while ( ( rx_bytes > 0 )  && strcmp ( params.fPacketType, fParams.fPacketType ) );

  212.         }

  213.         while ( ( GetPacketType ( &params ) != SLAVE_SETUP ) );

  214. 

  215.         //connect the socket

  216.         if ( fSocket.Connect() == SOCKET_ERROR )

  217.         {

  218.             jack_error ( "Error in connect : %s", StrError ( NET_ERROR_CODE ) );

  219.             return NET_CONNECT_ERROR;

  220.         }

  221. 

  222.         //everything is OK, copy parameters and return

  223.         fParams = params;

  224. 

  225.         return NET_CONNECTED;

  226.     }

  227. 

  228.     net_status_t JackNetDriver::SendMasterStartSync()

  229.     {

  230.         jack_log ( "JackNetDriver::GetNetMasterStartSync()" );

  231.         //tell the master to start

  232.         SetPacketType ( &fParams, START_MASTER );

  233.         if ( fSocket.Send ( &fParams, sizeof ( session_params_t ), 0 ) == SOCKET_ERROR )

  234.         {

  235.             jack_error ( "Error in send : %s", StrError ( NET_ERROR_CODE ) );

  236.             return ( fSocket.GetError() == NET_CONN_ERROR ) ? NET_ERROR : NET_SEND_ERROR;

  237.         }

  238.         return NET_ROLLING;

  239.     }

  240. 

  241.     void JackNetDriver::Restart()

  242.     {

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

  244.         delete[] fTxBuffer;

  245.         fTxBuffer = NULL;

  246.         delete[] fRxBuffer;

  247.         fRxBuffer = NULL;

  248.         delete fNetAudioCaptureBuffer;

  249.         fNetAudioCaptureBuffer = NULL;

  250.         delete fNetAudioPlaybackBuffer;

  251.         fNetAudioPlaybackBuffer = NULL;

  252.         delete fNetMidiCaptureBuffer;

  253.         fNetMidiCaptureBuffer = NULL;

  254.         delete fNetMidiPlaybackBuffer;

  255.         fNetMidiPlaybackBuffer = NULL;

  256.         FreePorts();

  257.         delete[] fMidiCapturePortList;

  258.         fMidiCapturePortList = NULL;

  259.         delete[] fMidiPlaybackPortList;

  260.         fMidiPlaybackPortList = NULL;

  261.         delete[] fMeasure;

  262.         fMeasure = NULL;

  263.         delete fMonitor;

  264.         fMonitor = NULL;

  265.     }

  266. 

  267.     int JackNetDriver::SetParams()

  268.     {

  269.         fNSubProcess = fParams.fPeriodSize / fParams.fFramesPerPacket;

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

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

  272. 

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

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

  275. 

  276.         //allocate midi ports lists

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

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

  279. 

  280.         //register jack ports

  281.         if ( AllocPorts() != 0 )

  282.         {

  283.             jack_error ( "Can't allocate ports." );

  284.             return -1;

  285.         }

  286. 

  287.         //TX header init

  288.         strcpy ( fTxHeader.fPacketType, "header" );

  289.         fTxHeader.fDataStream = 'r';

  290.         fTxHeader.fID = fParams.fID;

  291.         fTxHeader.fCycle = 0;

  292.         fTxHeader.fSubCycle = 0;

  293.         fTxHeader.fMidiDataSize = 0;

  294.         fTxHeader.fBitdepth = fParams.fBitdepth;

  295. 

  296.         //RX header init

  297.         strcpy ( fRxHeader.fPacketType, "header" );

  298.         fRxHeader.fDataStream = 's';

  299.         fRxHeader.fID = fParams.fID;

  300.         fRxHeader.fCycle = 0;

  301.         fRxHeader.fSubCycle = 0;

  302.         fRxHeader.fMidiDataSize = 0;

  303.         fRxHeader.fBitdepth = fParams.fBitdepth;

  304. 

  305.         //network buffers

  306.         fTxBuffer = new char[fParams.fMtu];

  307.         fRxBuffer = new char[fParams.fMtu];

  308. 

  309.         //net audio/midi buffers

  310.         fTxData = fTxBuffer + sizeof ( packet_header_t );

  311.         fRxData = fRxBuffer + sizeof ( packet_header_t );

  312. 

  313.         //midi net buffers

  314.         fNetMidiCaptureBuffer = new NetMidiBuffer ( &fParams, fParams.fSendMidiChannels, fRxData );

  315.         fNetMidiPlaybackBuffer = new NetMidiBuffer ( &fParams, fParams.fReturnMidiChannels, fTxData );

  316. 

  317.         //audio net buffers

  318.         fNetAudioCaptureBuffer = new NetAudioBuffer ( &fParams, fParams.fSendAudioChannels, fRxData );

  319.         fNetAudioPlaybackBuffer = new NetAudioBuffer ( &fParams, fParams.fReturnAudioChannels, fTxData );

  320. 

  321.         //audio netbuffer length

  322.         fAudioTxLen = sizeof ( packet_header_t ) + fNetAudioPlaybackBuffer->GetSize();

  323.         fAudioRxLen = sizeof ( packet_header_t ) + fNetAudioCaptureBuffer->GetSize();

  324. 

  325.         //payload size

  326.         fPayloadSize = fParams.fMtu - sizeof ( packet_header_t );

  327. 

  328.         //monitor

  329. #ifdef JACK_MONITOR

  330. 		string plot_name = string ( fParams.fName );

  331. 		plot_name += string ( "_slave_" );

  332. 		plot_name += ( fEngineControl->fSyncMode ) ? string ( "sync" ) : string ( "async" );

  333. 		fMonitor = new JackGnuPlotMonitor<float> ( JackNetDriver::fMeasureCnt, JackNetDriver::fMeasurePoints, plot_name );

  334.         fMeasure = new float[JackNetDriver::fMeasurePoints];

  335.         fMonitor->SetPlotFile ( JackNetDriver::fMonitorPlotOptions, JackNetDriver::fMonitorPlotOptionsCnt,

  336. 								JackNetDriver::fMonitorFieldNames, JackNetDriver::fMeasurePoints );

  337. #endif

  338. 

  339.         return 0;

  340.     }

  341. 

  342.     int JackNetDriver::AllocPorts()

  343.     {

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

  345.         JackPort* port;

  346.         jack_port_id_t port_id;

  347.         char name[JACK_CLIENT_NAME_SIZE + JACK_PORT_NAME_SIZE];

  348.         char alias[JACK_CLIENT_NAME_SIZE + JACK_PORT_NAME_SIZE];

  349.         unsigned long port_flags;

  350.         int audio_port_index;

  351.         uint midi_port_index;

  352. 

  353.         //audio

  354.         port_flags = JackPortIsOutput | JackPortIsPhysical | JackPortIsTerminal;

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

  356.         {

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

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

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

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

  361.             {

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

  363.                 return -1;

  364.             }

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

  366.             port->SetAlias ( alias );

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

  368.             fCapturePortList[audio_port_index] = port_id;

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

  370.         }

  371.         port_flags = JackPortIsInput | JackPortIsPhysical | JackPortIsTerminal;

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

  373.         {

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

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

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

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

  378.             {

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

  380.                 return -1;

  381.             }

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

  383.             port->SetAlias ( alias );

  384.             port->SetLatency ( fEngineControl->fBufferSize + ( ( fEngineControl->fSyncMode ) ? 0 : fEngineControl->fBufferSize ) );

  385.             fPlaybackPortList[audio_port_index] = port_id;

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

  387.         }

  388.         //midi

  389.         port_flags = JackPortIsOutput | JackPortIsPhysical | JackPortIsTerminal;

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

  391.         {

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

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

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

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

  396.             {

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

  398.                 return -1;

  399.             }

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

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

  402.             fMidiCapturePortList[midi_port_index] = port_id;

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

  404.         }

  405. 

  406.         port_flags = JackPortIsInput | JackPortIsPhysical | JackPortIsTerminal;

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

  408.         {

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

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

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

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

  413.             {

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

  415.                 return -1;

  416.             }

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

  418.             port->SetLatency ( fEngineControl->fBufferSize + ( ( fEngineControl->fSyncMode ) ? 0 : fEngineControl->fBufferSize ) );

  419.             fMidiPlaybackPortList[midi_port_index] = port_id;

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

  421.         }

  422. 

  423.         return 0;

  424.     }

  425. 

  426.     int JackNetDriver::FreePorts()

  427.     {

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

  429.         int audio_port_index;

  430.         uint midi_port_index;

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

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

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

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

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

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

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

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

  439.         return 0;

  440.     }

  441. 

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

  443.     {

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

  445.     }

  446. 

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

  448.     {

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

  450.     }

  451. 

  452.     int JackNetDriver::SetSyncPacket()

  453.     {

  454.         if ( fParams.fTransportSync )

  455.         {

  456.             //set the TransportData

  457. 

  458.             //copy to TxBuffer

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

  460.         }

  461.         return 0;

  462.     }

  463. 

  464.     int JackNetDriver::Recv ( size_t size, int flags )

  465.     {

  466.         int rx_bytes;

  467.         if ( ( rx_bytes = fSocket.Recv ( fRxBuffer, size, flags ) ) == SOCKET_ERROR )

  468.         {

  469.             net_error_t error = fSocket.GetError();

  470.             if ( error == NET_NO_DATA )

  471.             {

  472.                 jack_error ( "No incoming data, is the master still running ?" );

  473.                 return 0;

  474.             }

  475.             else if ( error == NET_CONN_ERROR )

  476.             {

  477.                 throw JackDriverException ( "Connection lost." );

  478.             }

  479.             else

  480.             {

  481.                 jack_error ( "Error in receive : %s", StrError ( NET_ERROR_CODE ) );

  482.                 return 0;

  483.             }

  484.         }

  485.         return rx_bytes;

  486.     }

  487. 

  488.     int JackNetDriver::Send ( size_t size, int flags )

  489.     {

  490.         int tx_bytes;

  491.         if ( ( tx_bytes = fSocket.Send ( fTxBuffer, size, flags ) ) == SOCKET_ERROR )

  492.         {

  493.             net_error_t error = fSocket.GetError();

  494.             if ( error == NET_CONN_ERROR )

  495.                 throw JackDriverException ( "Connection lost." );

  496.             else

  497.                 jack_error ( "Error in send : %s", StrError ( NET_ERROR_CODE ) );

  498.         }

  499.         return tx_bytes;

  500.     }

  501. 

  502. //*************************************process************************************************************************

  503. 

  504.     int JackNetDriver::Read()

  505.     {

  506.         int rx_bytes;

  507.         uint recvd_midi_pckt = 0;

  508.         packet_header_t* rx_head = reinterpret_cast<packet_header_t*> ( fRxBuffer );

  509.         fRxHeader.fIsLastPckt = 'n';

  510.         uint midi_port_index;

  511.         int audio_port_index;

  512. 

  513.         //buffers

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

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

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

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

  518. 

  519.         //receive sync (launch the cycle)

  520.         do

  521.         {

  522.             rx_bytes = Recv ( fParams.fMtu, 0 );

  523.             if ( ( rx_bytes == 0 ) || ( rx_bytes == SOCKET_ERROR ) )

  524.                 return rx_bytes;

  525.         }

  526.         while ( !rx_bytes && ( rx_head->fDataType != 's' ) );

  527. 

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

  529.         JackDriver::CycleTakeBeginTime();

  530. 

  531. #ifdef JACK_MONITOR

  532.         fMeasureId = 0;

  533. 		fMeasure[fMeasureId++] = ( ( (float)(GetMicroSeconds() - JackDriver::fBeginDateUst) ) / (float)fEngineControl->fPeriodUsecs ) * 100.f;

  534. #endif

  535. 

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

  537.         if ( fParams.fSendMidiChannels || fParams.fSendAudioChannels )

  538.         {

  539.             do

  540.             {

  541.                 if ( ( rx_bytes = Recv ( fParams.fMtu, MSG_PEEK ) ) == SOCKET_ERROR )

  542.                     return rx_bytes;

  543.                 if ( rx_bytes && ( rx_head->fDataStream == 's' ) && ( rx_head->fID == fParams.fID ) )

  544.                 {

  545.                     switch ( rx_head->fDataType )

  546.                     {

  547.                     case 'm':	//midi

  548.                         rx_bytes = Recv ( rx_bytes, 0 );

  549.                         fRxHeader.fIsLastPckt = rx_head->fIsLastPckt;

  550.                         fNetMidiCaptureBuffer->RenderFromNetwork ( rx_head->fSubCycle, rx_bytes - sizeof ( packet_header_t ) );

  551.                         if ( ++recvd_midi_pckt == rx_head->fNMidiPckt )

  552.                             fNetMidiCaptureBuffer->RenderToJackPorts();

  553.                         break;

  554.                     case 'a':	//audio

  555.                         rx_bytes = Recv ( fAudioRxLen, 0 );

  556.                         if ( !IsNextPacket ( &fRxHeader, rx_head, fNSubProcess ) )

  557.                             jack_error ( "Packet(s) missing..." );

  558.                         fRxHeader.fCycle = rx_head->fCycle;

  559.                         fRxHeader.fSubCycle = rx_head->fSubCycle;

  560.                         fRxHeader.fIsLastPckt = rx_head->fIsLastPckt;

  561.                         fNetAudioCaptureBuffer->RenderToJackPorts ( rx_head->fSubCycle );

  562.                         break;

  563.                     case 's':	//sync

  564.                         jack_info ( "NetDriver : driver overloaded, skipping receive." );

  565.                         fRxHeader.fCycle = rx_head->fCycle;

  566.                         return 0;

  567.                     }

  568.                 }

  569.             }

  570.             while ( fRxHeader.fIsLastPckt != 'y' );

  571.         }

  572.         fRxHeader.fCycle = rx_head->fCycle;

  573. 

  574. 

  575. #ifdef JACK_MONITOR

  576. 		fMeasure[fMeasureId++] = ( ( (float)(GetMicroSeconds() - JackDriver::fBeginDateUst) ) / (float)fEngineControl->fPeriodUsecs ) * 100.f;

  577. #endif

  578. 

  579.         return 0;

  580.     }

  581. 

  582.     int JackNetDriver::Write()

  583.     {

  584.         int tx_bytes, copy_size;

  585.         fTxHeader.fCycle = fRxHeader.fCycle;

  586.         fTxHeader.fSubCycle = 0;

  587.         fTxHeader.fIsLastPckt = 'n';

  588.         uint midi_port_index;

  589.         int audio_port_index;

  590. 

  591.         //buffers

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

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

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

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

  596. 

  597. #ifdef JACK_MONITOR

  598. 		fMeasure[fMeasureId++] = ( ( (float)(GetMicroSeconds() - JackDriver::fBeginDateUst) ) / (float)fEngineControl->fPeriodUsecs ) * 100.f;

  599. #endif

  600. 

  601.         //sync

  602.         fTxHeader.fDataType = 's';

  603.         if ( !fParams.fSendMidiChannels && !fParams.fSendAudioChannels )

  604.             fTxHeader.fIsLastPckt = 'y';

  605.         memset ( fTxData, 0, fPayloadSize );

  606.         SetSyncPacket();

  607.         tx_bytes = Send ( fParams.fMtu, 0 );

  608. 

  609. #ifdef JACK_MONITOR

  610. 		fMeasure[fMeasureId++] = ( ( (float)(GetMicroSeconds() - JackDriver::fBeginDateUst) ) / (float)fEngineControl->fPeriodUsecs ) * 100.f;

  611. #endif

  612. 

  613.         //midi

  614.         if ( fParams.fReturnMidiChannels )

  615.         {

  616.             fTxHeader.fDataType = 'm';

  617.             fTxHeader.fMidiDataSize = fNetMidiPlaybackBuffer->RenderFromJackPorts();

  618.             fTxHeader.fNMidiPckt = GetNMidiPckt ( &fParams, fTxHeader.fMidiDataSize );

  619.             for ( uint subproc = 0; subproc < fTxHeader.fNMidiPckt; subproc++ )

  620.             {

  621.                 fTxHeader.fSubCycle = subproc;

  622.                 if ( ( subproc == ( fTxHeader.fNMidiPckt - 1 ) ) && !fParams.fReturnAudioChannels )

  623.                     fTxHeader.fIsLastPckt = 'y';

  624.                 memcpy ( fTxBuffer, &fTxHeader, sizeof ( packet_header_t ) );

  625.                 copy_size = fNetMidiPlaybackBuffer->RenderToNetwork ( subproc, fTxHeader.fMidiDataSize );

  626.                 tx_bytes = Send ( sizeof ( packet_header_t ) + copy_size, 0 );

  627.             }

  628.         }

  629. 

  630.         //audio

  631.         if ( fParams.fReturnAudioChannels )

  632.         {

  633.             fTxHeader.fDataType = 'a';

  634.             for ( uint subproc = 0; subproc < fNSubProcess; subproc++ )

  635.             {

  636.                 fTxHeader.fSubCycle = subproc;

  637.                 if ( subproc == ( fNSubProcess - 1 ) )

  638.                     fTxHeader.fIsLastPckt = 'y';

  639.                 fNetAudioPlaybackBuffer->RenderFromJackPorts ( subproc );

  640.                 memcpy ( fTxBuffer, &fTxHeader, sizeof ( packet_header_t ) );

  641.                 tx_bytes = Send ( fAudioTxLen, 0 );

  642.             }

  643.         }

  644. 

  645. #ifdef JACK_MONITOR

  646. 		fMeasure[fMeasureId++] = ( ( (float)(GetMicroSeconds() - JackDriver::fBeginDateUst) ) / (float)fEngineControl->fPeriodUsecs ) * 100.f;

  647.         fMonitor->Write ( fMeasure );

  648. #endif

  649. 

  650.         return 0;

  651.     }

  652. 

  653. //*************************************loader*******************************************************

  654. 

  655. #ifdef __cplusplus

  656.     extern "C"

  657.     {

  658. #endif

  659.         EXPORT jack_driver_desc_t* driver_get_descriptor ()

  660.         {

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

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

  663.             desc->nparams = 9;

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

  665. 

  666.             int i = 0;

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

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

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

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

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

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

  673. 

  674.             i++;

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

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

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

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

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

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

  681. 

  682.             i++;

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

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

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

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

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

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

  689. 

  690.             i++;

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

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

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

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

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

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

  697. 

  698.             i++;

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

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

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

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

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

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

  705. 

  706.             i++;

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

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

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

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

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

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

  713. 

  714.             i++;

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

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

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

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

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

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

  721. 

  722.             i++;

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

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

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

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

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

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

  729. 

  730.             i++;

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

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

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

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

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

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

  737. 

  738.             return desc;

  739.         }

  740. 

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

  742.         {

  743.             if ( SocketAPIInit() < 0 )

  744.             {

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

  746.                 return NULL;

  747.             }

  748.             const char* multicast_ip = DEFAULT_MULTICAST_IP;

  749.             char name[JACK_CLIENT_NAME_SIZE];

  750.             GetHostName ( name, JACK_CLIENT_NAME_SIZE );

  751.             int udp_port = DEFAULT_PORT;

  752.             int mtu = 1500;

  753.             uint transport_sync = 1;

  754.             jack_nframes_t period_size = 128;

  755.             jack_nframes_t sample_rate = 48000;

  756.             int audio_capture_ports = 2;

  757.             int audio_playback_ports = 2;

  758.             int midi_input_ports = 0;

  759.             int midi_output_ports = 0;

  760.             bool monitor = false;

  761. 

  762.             const JSList* node;

  763.             const jack_driver_param_t* param;

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

  765.             {

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

  767.                 switch ( param->character )

  768.                 {

  769.                 case 'a' :

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

  771.                     break;

  772.                 case 'p':

  773.                     udp_port = param->value.ui;

  774.                     break;

  775.                 case 'M':

  776.                     mtu = param->value.i;

  777.                     break;

  778.                 case 'C':

  779.                     audio_capture_ports = param->value.i;

  780.                     break;

  781.                 case 'P':

  782.                     audio_playback_ports = param->value.i;

  783.                     break;

  784.                 case 'i':

  785.                     midi_input_ports = param->value.i;

  786.                     break;

  787.                 case 'o':

  788.                     midi_output_ports = param->value.i;

  789.                     break;

  790.                 case 'n' :

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

  792.                 case 't' :

  793.                     transport_sync = param->value.ui;

  794.                 }

  795.             }

  796. 

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

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

  799.                                           midi_input_ports, midi_output_ports, name, transport_sync ) );

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

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

  802.                 return driver;

  803. 

  804.             delete driver;

  805.             return NULL;

  806.         }

  807. 

  808. #ifdef __cplusplus

  809.     }

  810. #endif

  811. }