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livetrax/libs/appleutility/CoreAudio/PublicUtility/CAAUParameter.cpp

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/*
File: CAAUParameter.cpp
Abstract: CAAUParameter.h
Version: 1.1
Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple
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Copyright (C) 2014 Apple Inc. All Rights Reserved.
*/
#include "CAAUParameter.h"
CAAUParameter::CAAUParameter()
{
memset(this, 0, sizeof(CAAUParameter));
}
CAAUParameter::CAAUParameter(AudioUnit au, AudioUnitParameterID param, AudioUnitScope scope, AudioUnitElement element)
{
memset(this, 0, sizeof(CAAUParameter));
Init (au, param, scope, element);
}
CAAUParameter::CAAUParameter (AudioUnitParameter &inParam)
{
memset(this, 0, sizeof(CAAUParameter));
Init (inParam.mAudioUnit, inParam.mParameterID, inParam.mScope, inParam.mElement);
}
CAAUParameter::CAAUParameter(const CAAUParameter &a)
{
memset(this, 0, sizeof(CAAUParameter));
*this = a;
}
CAAUParameter & CAAUParameter::operator = (const CAAUParameter &a)
{
if (mParamName) CFRelease(mParamName);
if (mParamTag) CFRelease(mParamTag);
if (mNamedParams) CFRelease(mNamedParams);
memcpy(this, &a, sizeof(CAAUParameter));
if (mParamName) CFRetain(mParamName);
if (mParamTag) CFRetain(mParamTag);
if (mNamedParams) CFRetain(mNamedParams);
return *this;
}
CAAUParameter::~CAAUParameter()
{
if (mParamName) CFRelease(mParamName);
if (mParamTag) CFRelease(mParamTag);
if (mNamedParams) CFRelease (mNamedParams);
}
void CAAUParameter::Init (AudioUnit au, AudioUnitParameterID param, AudioUnitScope scope, AudioUnitElement element)
{
mAudioUnit = au;
mParameterID = param;
mScope = scope;
mElement = element;
UInt32 propertySize = sizeof(mParamInfo);
OSStatus err = AudioUnitGetProperty(au, kAudioUnitProperty_ParameterInfo,
scope, param, &mParamInfo, &propertySize);
if (err)
memset(&mParamInfo, 0, sizeof(mParamInfo));
if (mParamInfo.flags & kAudioUnitParameterFlag_HasCFNameString) {
mParamName = mParamInfo.cfNameString;
if (!(mParamInfo.flags & kAudioUnitParameterFlag_CFNameRelease))
CFRetain (mParamName);
} else
mParamName = CFStringCreateWithCString(NULL, mParamInfo.name, kCFStringEncodingUTF8);
const char* str = 0;
switch (mParamInfo.unit)
{
case kAudioUnitParameterUnit_Boolean:
str = "T/F";
break;
case kAudioUnitParameterUnit_Percent:
case kAudioUnitParameterUnit_EqualPowerCrossfade:
str = "%";
break;
case kAudioUnitParameterUnit_Seconds:
str = "Secs";
break;
case kAudioUnitParameterUnit_SampleFrames:
str = "Samps";
break;
case kAudioUnitParameterUnit_Phase:
case kAudioUnitParameterUnit_Degrees:
str = "Degr.";
break;
case kAudioUnitParameterUnit_Hertz:
str = "Hz";
break;
case kAudioUnitParameterUnit_Cents:
case kAudioUnitParameterUnit_AbsoluteCents:
str = "Cents";
break;
case kAudioUnitParameterUnit_RelativeSemiTones:
str = "S-T";
break;
case kAudioUnitParameterUnit_MIDINoteNumber:
case kAudioUnitParameterUnit_MIDIController:
str = "MIDI";
//these are inclusive, so add one value here
mNumIndexedParams = short(mParamInfo.maxValue+1 - mParamInfo.minValue);
break;
case kAudioUnitParameterUnit_Decibels:
str = "dB";
break;
case kAudioUnitParameterUnit_MixerFaderCurve1:
case kAudioUnitParameterUnit_LinearGain:
str = "Gain";
break;
case kAudioUnitParameterUnit_Pan:
str = "L/R";
break;
case kAudioUnitParameterUnit_Meters:
str = "Mtrs";
break;
case kAudioUnitParameterUnit_Octaves:
str = "8ve";
break;
case kAudioUnitParameterUnit_BPM:
str = "BPM";
break;
case kAudioUnitParameterUnit_Beats:
str = "Beats";
break;
case kAudioUnitParameterUnit_Milliseconds:
str = "msecs";
break;
case kAudioUnitParameterUnit_Ratio:
str = "Ratio";
break;
case kAudioUnitParameterUnit_Indexed:
{
propertySize = sizeof(mNamedParams);
err = AudioUnitGetProperty (au,
kAudioUnitProperty_ParameterValueStrings,
scope,
param,
&mNamedParams,
&propertySize);
if (!err && mNamedParams) {
mNumIndexedParams = CFArrayGetCount(mNamedParams);
} else {
//these are inclusive, so add one value here
mNumIndexedParams = short(mParamInfo.maxValue+1 - mParamInfo.minValue);
}
str = NULL;
}
break;
case kAudioUnitParameterUnit_CustomUnit:
{
CFStringRef unitName = mParamInfo.unitName;
static char paramStr[256];
CFStringGetCString (unitName, paramStr, 256, kCFStringEncodingUTF8);
if (mParamInfo.flags & kAudioUnitParameterFlag_CFNameRelease)
CFRelease (unitName);
str = paramStr;
break;
}
case kAudioUnitParameterUnit_Generic:
case kAudioUnitParameterUnit_Rate:
default:
str = NULL;
break;
}
if (str)
mParamTag = CFStringCreateWithCString(NULL, str, kCFStringEncodingUTF8);
else
mParamTag = NULL;
}
Float32 CAAUParameter::GetValue() const
{
Float32 value = 0.;
//OSStatus err =
AudioUnitGetParameter(mAudioUnit, mParameterID, mScope, mElement, &value);
return value;
}
CFStringRef CreateLocalizedStringForParameterValue ( double inParameterValue,
const CAAUParameter * inParameter,
UInt32 inDigits,
UInt32 minDigits) {
if (!inParameter) return nil;
AudioUnitParameterInfo info = inParameter->ParamInfo();
int pow10;
switch (info.unit) {
case kAudioUnitParameterUnit_Hertz:
// number of significant digits based on value
pow10 = int(log10(fmax(inParameterValue, .000001)));
break;
default:
// number of significant digits based on parameter range
pow10 = int(log10(fmax(double(info.maxValue - info.minValue), .000001)));
break;
}
// pow10 range nDigitsAfterDecimal
// -2 .0100-.0999 4
// -1 .100-.999 3
// 0 1.00-9.99 2
// 1 10.0-99.9 1
// 2 100-999 0
// 3 1000-9990 -1
// 4 10000-99900 -2
int nDigitsAfterDecimal = inDigits - (pow10 + 1);
if (nDigitsAfterDecimal < 0)
nDigitsAfterDecimal = 0; // the least number of digits possible is zero
if (info.flags & kAudioUnitParameterFlag_IsHighResolution)
nDigitsAfterDecimal = 4;
CFLocaleRef currentLocale = CFLocaleCopyCurrent();
CFNumberFormatterRef numberFormatter = CFNumberFormatterCreate (NULL, currentLocale, kCFNumberFormatterDecimalStyle);
CFNumberRef maxFractionDigits = CFNumberCreate (NULL, kCFNumberIntType, &nDigitsAfterDecimal);
if (nDigitsAfterDecimal > 0)
nDigitsAfterDecimal = minDigits;
CFNumberRef minFractionDigits = CFNumberCreate (NULL, kCFNumberIntType, &nDigitsAfterDecimal);
CFNumberFormatterSetProperty (numberFormatter, kCFNumberFormatterMinFractionDigits, minFractionDigits);
CFNumberFormatterSetProperty (numberFormatter, kCFNumberFormatterMaxFractionDigits, maxFractionDigits);
CFStringRef formattedNumberString = CFNumberFormatterCreateStringWithValue (NULL, numberFormatter, kCFNumberDoubleType, &inParameterValue);
CFRelease(currentLocale);
CFRelease(numberFormatter);
CFRelease(maxFractionDigits);
CFRelease(minFractionDigits);
return formattedNumberString;
}
CFStringRef CreateLocalizedStringForParameterValue ( double inParameterValue,
const CAAUParameter * inParameter,
UInt32 inDigits) {
return CreateLocalizedStringForParameterValue (inParameterValue, inParameter, inDigits, 1);
}
double ValueForLocalizedParameterString (CFStringRef string, const CAAUParameter * inParameter) {
CFLocaleRef currentLocale = CFLocaleCopyCurrent();
CFNumberFormatterRef numberFormatter = CFNumberFormatterCreate (NULL, currentLocale, kCFNumberFormatterDecimalStyle);
double value = 0;
Boolean worked = CFNumberFormatterGetValueFromString (numberFormatter, string, NULL, kCFNumberDoubleType, &value);
CFRelease(currentLocale);
CFRelease(numberFormatter);
if (worked)
return value;
else {
AudioUnitParameterInfo info = inParameter->ParamInfo();
return info.defaultValue;
}
}
CFStringRef CAAUParameter::GetStringFromValueCopy(const Float32 *value) const
{
if (HasNamedParams())
{
Float32 val = (value == NULL ? GetValue() : *value);
int index = int(mParamInfo.minValue) + int(val);
CFStringRef str = GetParamName (index);
if (str) {
CFRetain (str);
return str;
}
}
else if (ValuesHaveStrings())
{
AudioUnitParameterStringFromValue stringValue;
stringValue.inParamID = mParameterID;
stringValue.inValue = value;
stringValue.outString = NULL;
UInt32 propertySize = sizeof(stringValue);
OSStatus err = AudioUnitGetProperty (mAudioUnit,
kAudioUnitProperty_ParameterStringFromValue,
mScope,
0,
&stringValue,
&propertySize);
if (!err && stringValue.outString != NULL)
return stringValue.outString;
}
Float32 val = (value == NULL ? GetValue() : *value);
AudioUnitParameterUnit unit = this->ParamInfo().unit;
if (unit == kAudioUnitParameterUnit_Cents || unit == kAudioUnitParameterUnit_AbsoluteCents)
return CreateLocalizedStringForParameterValue(val, this, 4, 0);
else
return CreateLocalizedStringForParameterValue(val, this, 4);
}
Float32 CAAUParameter::GetValueFromString(CFStringRef str) const
{
if (ValuesHaveStrings())
{
AudioUnitParameterValueFromString valueString;
valueString.inParamID = mParameterID;
valueString.inString = str;
UInt32 propertySize = sizeof(valueString);
OSStatus err = AudioUnitGetProperty (mAudioUnit,
kAudioUnitProperty_ParameterValueFromString,
mScope,
0,
&valueString,
&propertySize);
if (!err) {
return valueString.outValue;
}
}
return (Float32) ValueForLocalizedParameterString(str, this);
}
void CAAUParameter::SetValue( AUParameterListenerRef inListener,
void * inObject,
Float32 inValue) const
{
// clip inValue as: maxValue >= inValue >= minValue before setting
Float32 valueToSet = inValue;
if (valueToSet > mParamInfo.maxValue)
valueToSet = mParamInfo.maxValue;
if (valueToSet < mParamInfo.minValue)
valueToSet = mParamInfo.minValue;
AUParameterSet(inListener, inObject, this, valueToSet, 0);
}
#if DEBUG
void CAAUParameter::Print() const
{
UInt32 clump = 0;
GetClumpID (clump);
UInt32 len = static_cast<UInt32>(CFStringGetLength(mParamName));
char* chars = (char*)malloc (len * 2); // give us plenty of room for unichar chars
if (!CFStringGetCString (mParamName, chars, len * 2, kCFStringEncodingUTF8))
chars[0] = 0;
printf ("ID: %ld, Clump: %u, Name: %s\n", (long unsigned int) mParameterID, (unsigned int) clump, chars);
free (chars);
}
#endif