CoreAudio/PublicUtility/AUParamInfo.cpp
/* |
File: AUParamInfo.cpp |
Abstract: AUParamInfo.h |
Version: 1.1 |
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*/ |
#include "AUParamInfo.h" |
#include "CAXException.h" |
AUParamInfo::AUParamInfo (AudioUnit inAU, |
bool inIncludeExpert, |
bool inIncludeReadOnly, |
AudioUnitScope inScope, |
AudioUnitElement inElement) |
: mAU (inAU), |
mNumParams (0), |
mParamListID(NULL), |
mScope (inScope), |
mElement (inElement) |
{ |
UInt32 size; |
OSStatus result = AudioUnitGetPropertyInfo(mAU, kAudioUnitProperty_ParameterList, inScope, mElement, &size, NULL); |
if (size == 0 || result) return; |
int nparams = size / sizeof(AudioUnitPropertyID); |
mParamListID = new AudioUnitParameterID[nparams]; |
memset (mParamListID, 0xFF, size); |
AudioUnitParameterID *paramList = new AudioUnitParameterID[nparams]; |
result = AudioUnitGetProperty(mAU, kAudioUnitProperty_ParameterList, mScope, mElement, paramList, &size); |
if (result) { |
delete [] mParamListID; |
delete [] paramList; |
mParamListID = NULL; |
return; |
} |
ParameterMap params; |
for (int i = 0; i < nparams; ++i) |
{ |
CAAUParameter auvp (mAU, paramList[i], mScope, mElement); // took out only using global scope in CAAUParameter creation |
const AudioUnitParameterInfo ¶mInfo = auvp.ParamInfo(); |
// don't include if parameter can't be read or written |
if (!(paramInfo.flags & kAudioUnitParameterFlag_IsWritable) |
&& !(paramInfo.flags & kAudioUnitParameterFlag_IsReadable)) |
continue; |
// only include if expert params wanted |
if (!inIncludeExpert && auvp.IsExpert()) |
continue; |
// only include if read only params are wanted |
if (!(paramInfo.flags & kAudioUnitParameterFlag_IsWritable) |
&& (paramInfo.flags & kAudioUnitParameterFlag_IsReadable)) |
{ |
if (!inIncludeReadOnly) |
continue; |
} |
mParamListID[mNumParams] = paramList[i]; |
mNumParams++; |
// ok - if we're here, then we have a parameter we are going to display. |
UInt32 clump = 0; |
auvp.GetClumpID (clump); |
mParams[clump].push_back (auvp); |
} |
delete [] paramList; |
} |
AUParamInfo::~AUParamInfo() |
{ |
delete [] mParamListID; |
} |
UInt32 AUParamInfo::NumParamsForClump (UInt32 inClump) const |
{ |
ParameterMap::const_iterator it = mParams.find(inClump); |
if (it != mParams.end()) |
return static_cast<UInt32>((*it).second.size()); |
return 0; |
} |
const CAAUParameter* AUParamInfo::GetParamInfo (AudioUnitParameterID inParamID) const |
{ |
for (ParameterMap::const_iterator it = mParams.begin(); it != mParams.end(); ++it) { |
const ParameterList &list = (*it).second; |
for (ParameterList::const_iterator iter = list.begin(); iter != list.end(); ++iter) { |
if (inParamID == (*iter).mParameterID) { |
return &(*iter); |
} |
} |
} |
return NULL; |
} |
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