CAAUMIDIMapManager.cpp

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#include "CAAUMIDIMapManager.h"
#include <AudioToolbox/AudioUnitUtilities.h>

CAAUMIDIMapManager::CAAUMIDIMapManager()
{   
    hotMapping = false; 
}

static void FillInMap (CAAUMIDIMap &map, AUBase &That)
{
    AudioUnitParameterInfo info;
    That.GetParameterInfo (map.mScope, map.mParameterID, info);
    
    if (map.IsSubRange()) {
        map.mMinValue = map.mSubRangeMin;
        map.mMaxValue = map.mSubRangeMax;
    } else {
        map.mMinValue = info.minValue;          
        map.mMaxValue = info.maxValue;      
    }
    
    map.mTransType = CAAUMIDIMap::GetTransformer(info.flags);
}

OSStatus    CAAUMIDIMapManager::SortedInsertToParamaterMaps (AUParameterMIDIMapping *maps, UInt32 inNumMaps, AUBase &That)
{   
    for (unsigned int i = 0; i < inNumMaps; ++i) 
    {
        CAAUMIDIMap map(maps[i]);

        FillInMap (map, That);
        
        int idx = FindParameterIndex (maps[i]);
        if (idx > -1)
            mParameterMaps.erase(mParameterMaps.begin() + idx);

            // least disruptive place to put this is at the end
        mParameterMaps.push_back(map);
    }
    
    std::sort(mParameterMaps.begin(), mParameterMaps.end(), CompareMIDIMap());  
    
    return noErr;
}

void CAAUMIDIMapManager::GetHotParameterMap(AUParameterMIDIMapping &outMap )
{
    outMap = mHotMap;
}

void CAAUMIDIMapManager::SortedRemoveFromParameterMaps(AUParameterMIDIMapping *maps, UInt32 inNumMaps, bool &outMapDidChange)
{   
    if (hotMapping) {
        hotMapping = false;
    }

    outMapDidChange = false;
    for (unsigned int i = 0; i < inNumMaps; ++i) {
        int idx = FindParameterIndex (maps[i]);
        if (idx > -1) {
            //mParameterMaps[idx].Print();
            mParameterMaps.erase(mParameterMaps.begin() + idx);
            outMapDidChange = true;
        }
    }
}

void    CAAUMIDIMapManager::ReplaceAllMaps (AUParameterMIDIMapping* inMappings, UInt32 inNumMaps, AUBase &That)
{
    mParameterMaps.clear();

    for (unsigned int i = 0; i < inNumMaps; ++i) {
        CAAUMIDIMap mapping(inMappings[i]);

        FillInMap (mapping, That);
        mParameterMaps.push_back (mapping);
    }

    std::sort(mParameterMaps.begin(),mParameterMaps.end(), CompareMIDIMap());   
}

bool CAAUMIDIMapManager::HandleHotMapping(UInt8     inStatus,
                                          UInt8     inChannel,
                                          UInt8     inData1,
                                          AUBase    &That)
{ //used to set the hot map info

    if (inStatus == 0xf0) return false;
    
    if (!hotMapping) return false;
    hotMapping = false;

    mHotMap.mStatus = inStatus | inChannel;  
    mHotMap.mData1 = inData1; 
        
    SortedInsertToParamaterMaps (&mHotMap, 1, That);
    return true;
}

#if DEBUG

void CAAUMIDIMapManager::Print()
{
    for ( ParameterMaps::iterator i = mParameterMaps.begin(); i < mParameterMaps.end(); ++i) { 
        CAAUMIDIMap* listmap =  &(*i);      
        listmap->Print();       
    }       
}

#endif // DEBUG

void CAAUMIDIMapManager::GetMaps(AUParameterMIDIMapping* maps)
{
    int i = 0;
    for ( ParameterMaps::iterator iter = mParameterMaps.begin(); iter < mParameterMaps.end(); ++iter, ++i) { 
        AUParameterMIDIMapping &listmap =  (*iter); 
        maps[i] = listmap;  
    }
}

int CAAUMIDIMapManager::FindParameterIndex (AUParameterMIDIMapping &inMap)
{ 
    //used to get back hot mapping and one at a time maps, for ui
    
    int idx = 0;
    for ( ParameterMaps::iterator i = mParameterMaps.begin(); i < mParameterMaps.end(); ++i) { 
        CAAUMIDIMap & listmap =  (*i);
        if ( (listmap.mParameterID == inMap.mParameterID) && 
             (listmap.mScope == inMap.mScope) && 
             (listmap.mElement == inMap.mElement) )
        { 
                return idx; 
        }
        idx++;
    }
    return -1;
}

bool CAAUMIDIMapManager::FindParameterMapEventMatch(    UInt8           inStatus,
                                                        UInt8           inChannel,
                                                        UInt8           inData1,
                                                        UInt8           inData2,
                                                        UInt32          inBufferOffset,
                                                        AUBase&         inAUBase)
{
    bool ret_value = false;

    if (inStatus == 0x90 && !inData2)
        inStatus = 0x80 | inChannel;
    
    //used to test for midi matches once map is made
    CAAUMIDIMap tempMap;
    tempMap.mStatus = inStatus | inChannel;
    tempMap.mData1 = inData1;
    
    CompareMIDIMap compareObj;

    AudioUnitEvent event;
    event.mEventType = kAudioUnitEvent_ParameterValueChange;
    event.mArgument.mParameter.mAudioUnit = inAUBase.GetComponentInstance();
    
    ParameterMaps::iterator lower_iter = 
    std::lower_bound(mParameterMaps.begin(), mParameterMaps.end(), tempMap, compareObj);
    
    while (lower_iter < mParameterMaps.end()) 
    {
        CAAUMIDIMap & map = (*lower_iter);
        if (compareObj.Finish(map, tempMap)) 
            break;
        
        Float32 value;
        if (map.MIDI_Matches(inChannel, inData1, inData2, value))
        {   
            inAUBase.SetParameter ( map.mParameterID, map.mScope, map.mElement, 
                                    map.ParamValueFromMIDILinear(value), inBufferOffset);

            event.mArgument.mParameter.mParameterID = map.mParameterID;
            event.mArgument.mParameter.mScope = map.mScope;
            event.mArgument.mParameter.mElement = map.mElement;
            
            AUEventListenerNotify(NULL, NULL, &event);
            ret_value = true;
        }
        ++lower_iter;
    }
    return ret_value;
}