vsthostutils.h

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//-----------------------------------------------------------------------------
// Project     : VST SDK
// Version     : 3.0
//
// Category    : Helpers
// Filename    : vsthostutils.h
// Created by  : Steinberg, 10/2005
// Modified    : $Date: 2008/01/10 10:36:23 $
// Description : VST Hosting Utilities
//
//-----------------------------------------------------------------------------
// LICENSE
// © 2008, Steinberg Media Technologies GmbH, All Rights Reserved
//-----------------------------------------------------------------------------
// This Software Development Kit may not be distributed in parts or its entirety  
// without prior written agreement by Steinberg Media Technologies GmbH. 
// This SDK must not be used to re-engineer or manipulate any technology used  
// in any Steinberg or Third-party application or software module, 
// unless permitted by law.
// Neither the name of the Steinberg Media Technologies nor the names of its
// contributors may be used to endorse or promote products derived from this
// software without specific prior written permission.
// 
// THIS SDK IS PROVIDED BY STEINBERG MEDIA TECHNOLOGIES GMBH "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
// IN NO EVENT SHALL STEINBERG MEDIA TECHNOLOGIES GMBH BE LIABLE FOR ANY DIRECT, 
// INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 
// OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
// OF THE POSSIBILITY OF SUCH DAMAGE.
//----------------------------------------------------------------------------------

#ifndef __vsthostutils__
#define __vsthostutils__

#include "pluginterfaces/vst/ivstcomponent.h"
#include "pluginterfaces/vst/ivstaudioprocessor.h"

//------------------------------------------------------------------------
namespace Steinberg {
namespace Vst {

//------------------------------------------------------------------------
// HostProcessData
//------------------------------------------------------------------------
class HostProcessData: public ProcessData
{
public:
//------------------------------------------------------------------------
        HostProcessData ();
        ~HostProcessData ();

        bool prepare (IComponent& component);

        void unprepare ();

        void setChannelBuffers (BusDirection dir, int32 busIndex, Sample32* sampleBuffer);

        void setChannelBuffers (BusDirection dir, int32 busIndex, Sample32* sampleBuffers[], int32 bufferCount);
//------------------------------------------------------------------------
protected:
        AudioBusBuffers* createBusBuffers (IComponent& component, BusDirection dir, int32 busCount);
        void destroyBusBuffers (AudioBusBuffers* buffers, int32 busCount);
};

//------------------------------------------------------------------------
// inline
//------------------------------------------------------------------------
inline void HostProcessData::setChannelBuffers (BusDirection dir, int32 busIndex, Sample32* sampleBuffer)
{
        // Hotfix for DevTrack 3139, Yvan need to have a look. Seems that Sidechain is not correctly removed
        if (dir == kInput && (!inputs || busIndex >= numInputs))
                return;
        if (dir == kOutput && (!outputs || busIndex >= numOutputs))
                return;
//      if (dir == kInput && !inputs)
//              return;
//      if (dir == kOutput && !outputs)
//              return;
        AudioBusBuffers& busBuffers = dir == kInput ? inputs[busIndex] : outputs[busIndex];
        for (int32 i = 0; i < busBuffers.numChannels; i++)
                busBuffers.channelBuffers32[i] = sampleBuffer;
}

//------------------------------------------------------------------------
inline void HostProcessData::setChannelBuffers (BusDirection dir, int32 busIndex, Sample32* sampleBuffers[], int32 bufferCount)
{
        // Hotfix for DevTrack 3139, Yvan need to have a look. Seems that Sidechain is not correctly removed
        if (dir == kInput && (!inputs || busIndex >= numInputs))
                return;
        if (dir == kOutput && (!outputs || busIndex >= numOutputs))
                return;
//      if (dir == kInput && !inputs)
//              return;
//      if (dir == kOutput && !outputs)
//              return;
        AudioBusBuffers& busBuffers = dir == kInput ? inputs[busIndex] : outputs[busIndex];
        int32 count = bufferCount < busBuffers.numChannels ? bufferCount : busBuffers.numChannels;
        for (int32 i = 0; i < count; i++)
                busBuffers.channelBuffers32[i] = sampleBuffers ? sampleBuffers[i] : 0;
}
//------------------------------------------------------------------------

}} // namespace Vst

#endif  // __vsthostutils__

---

Copyright ©2008 Steinberg Media Technologies. All Rights Reserved.