jamulus/src/vstmain.cpp

/******************************************************************************\
 * Copyright (c) 2004-2019
 *
 * Author(s):
 *  Volker Fischer
 *
 ******************************************************************************
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 *
\******************************************************************************/

#include "vstmain.h"


/* Implementation *************************************************************/
// this function is required for host to get plugin
AudioEffect* createEffectInstance ( audioMasterCallback AudioMaster )
{
    return new CLlconVST ( AudioMaster );
}

CLlconVST::CLlconVST ( audioMasterCallback AudioMaster ) :
    AudioEffectX ( AudioMaster, 1, 0 ), // 1 program with no parameters (=0)
    Client ( LLCON_DEFAULT_PORT_NUMBER )
{
    // stereo input/output
    setNumInputs  ( 2 );
    setNumOutputs ( 2 );

    setUniqueID ( 'Llco' );

    // capabilities of llcon VST plugin
    canProcessReplacing(); // supports replacing output

    // set default program name
    GetName ( strProgName );

    // we want a single shot timer to shut down the connection if no
    // processing is done anymore (VST host has stopped the stream)
    TimerOnOff.setSingleShot ( true );
    TimerOnOff.setInterval   ( VST_STOP_TIMER_INTERVAL );

    // connect timer event
    connect ( &TimerOnOff, SIGNAL ( timeout() ),
        this, SLOT ( OnTimerOnOff() ) );

// TODO settings
Client.SetServerAddr ( DEFAULT_SERVER_ADDRESS );
}

bool CLlconVST::GetName ( char* cName )
{
    // this name is used for program name, effect name, product string and
    // vendor string
    vst_strncpy ( cName, "Llcon", kVstMaxEffectNameLen );
    return true;
}

void CLlconVST::OnTimerOnOff()
{
    // stop client since VST host seems to have stopped
    Client.Stop();
}

void CLlconVST::processReplacing ( float**  pvIn,
                                   float**  pvOut,
                                   VstInt32 iNumSamples )
{
    int i, j;

    // reset stop timer
    TimerOnOff.start();

    // check if client is running, if not, start it
    if ( !Client.IsRunning() )
    {
        // set buffer size and start
        Client.GetSound()->SetMonoBufferSize ( iNumSamples );
        Client.Start();
    }

    // get pointers to actual buffers
    float* pfIn0  = pvIn[0];
    float* pfIn1  = pvIn[1];
    float* pfOut0 = pvOut[0];
    float* pfOut1 = pvOut[1];

    // copy input data
    for ( i = 0, j = 0; i < iNumSamples; i++, j += 2 )
    {
        Client.GetSound()->vecsTmpAudioSndCrdStereo[j]     = pfIn0[i];
        Client.GetSound()->vecsTmpAudioSndCrdStereo[j + 1] = pfIn1[i];
    }

    // call processing callback function
    Client.GetSound()->VSTProcessCallback();

    // copy output data
    for ( i = 0, j = 0; i < iNumSamples; i++, j += 2 )
    {
        pfOut0[i] = Client.GetSound()->vecsTmpAudioSndCrdStereo[j];
        pfOut1[i] = Client.GetSound()->vecsTmpAudioSndCrdStereo[j + 1];
    }
}