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juce_AudioProcessor.cpp
1643 lines (1302 loc) · 56.7 KB
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juce_AudioProcessor.cpp
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/*
==============================================================================
This file is part of the JUCE library.
Copyright (c) 2022 - Raw Material Software Limited
JUCE is an open source library subject to commercial or open-source
licensing.
By using JUCE, you agree to the terms of both the JUCE 7 End-User License
Agreement and JUCE Privacy Policy.
End User License Agreement: www.juce.com/juce-7-licence
Privacy Policy: www.juce.com/juce-privacy-policy
Or: You may also use this code under the terms of the GPL v3 (see
www.gnu.org/licenses).
JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
DISCLAIMED.
==============================================================================
*/
namespace juce
{
static ThreadLocalValue<AudioProcessor::WrapperType> wrapperTypeBeingCreated;
void JUCE_CALLTYPE AudioProcessor::setTypeOfNextNewPlugin (AudioProcessor::WrapperType type)
{
wrapperTypeBeingCreated = type;
}
AudioProcessor::AudioProcessor()
: AudioProcessor (BusesProperties().withInput ("Input", AudioChannelSet::stereo(), false)
.withOutput ("Output", AudioChannelSet::stereo(), false))
{
}
AudioProcessor::AudioProcessor (const BusesProperties& ioConfig)
: wrapperType (wrapperTypeBeingCreated.get())
{
for (auto& layout : ioConfig.inputLayouts) createBus (true, layout);
for (auto& layout : ioConfig.outputLayouts) createBus (false, layout);
updateSpeakerFormatStrings();
}
AudioProcessor::~AudioProcessor()
{
{
const ScopedLock sl (activeEditorLock);
// ooh, nasty - the editor should have been deleted before its AudioProcessor.
jassert (activeEditor == nullptr);
}
#if JUCE_DEBUG && ! JUCE_DISABLE_AUDIOPROCESSOR_BEGIN_END_GESTURE_CHECKING
// This will fail if you've called beginParameterChangeGesture() for one
// or more parameters without having made a corresponding call to endParameterChangeGesture...
jassert (changingParams.countNumberOfSetBits() == 0);
#endif
}
//==============================================================================
StringArray AudioProcessor::getAlternateDisplayNames() const { return StringArray (getName()); }
//==============================================================================
bool AudioProcessor::addBus (bool isInput)
{
if (! canAddBus (isInput))
return false;
BusProperties busesProps;
if (! canApplyBusCountChange (isInput, true, busesProps))
return false;
createBus (isInput, busesProps);
return true;
}
bool AudioProcessor::removeBus (bool inputBus)
{
auto numBuses = getBusCount (inputBus);
if (numBuses == 0)
return false;
if (! canRemoveBus (inputBus))
return false;
BusProperties busesProps;
if (! canApplyBusCountChange (inputBus, false, busesProps))
return false;
auto busIndex = numBuses - 1;
auto numChannels = getChannelCountOfBus (inputBus, busIndex);
(inputBus ? inputBuses : outputBuses).remove (busIndex);
audioIOChanged (true, numChannels > 0);
return true;
}
//==============================================================================
bool AudioProcessor::setBusesLayout (const BusesLayout& arr)
{
jassert (arr.inputBuses. size() == getBusCount (true)
&& arr.outputBuses.size() == getBusCount (false));
if (arr == getBusesLayout())
return true;
auto copy = arr;
if (! canApplyBusesLayout (copy))
return false;
return applyBusLayouts (copy);
}
bool AudioProcessor::setBusesLayoutWithoutEnabling (const BusesLayout& arr)
{
auto numIns = getBusCount (true);
auto numOuts = getBusCount (false);
jassert (arr.inputBuses. size() == numIns
&& arr.outputBuses.size() == numOuts);
auto request = arr;
auto current = getBusesLayout();
for (int i = 0; i < numIns; ++i)
if (request.getNumChannels (true, i) == 0)
request.getChannelSet (true, i) = current.getChannelSet (true, i);
for (int i = 0; i < numOuts; ++i)
if (request.getNumChannels (false, i) == 0)
request.getChannelSet (false, i) = current.getChannelSet (false, i);
if (! checkBusesLayoutSupported (request))
return false;
for (int dir = 0; dir < 2; ++dir)
{
const bool isInput = (dir != 0);
for (int i = 0; i < (isInput ? numIns : numOuts); ++i)
{
auto& bus = *getBus (isInput, i);
auto& set = request.getChannelSet (isInput, i);
if (! bus.isEnabled())
{
if (! set.isDisabled())
bus.lastLayout = set;
set = AudioChannelSet::disabled();
}
}
}
return setBusesLayout (request);
}
AudioProcessor::BusesLayout AudioProcessor::getBusesLayout() const
{
BusesLayout layouts;
for (auto& i : inputBuses) layouts.inputBuses.add (i->getCurrentLayout());
for (auto& i : outputBuses) layouts.outputBuses.add (i->getCurrentLayout());
return layouts;
}
AudioChannelSet AudioProcessor::getChannelLayoutOfBus (bool isInput, int busIndex) const noexcept
{
if (auto* bus = (isInput ? inputBuses : outputBuses)[busIndex])
return bus->getCurrentLayout();
return {};
}
bool AudioProcessor::setChannelLayoutOfBus (bool isInputBus, int busIndex, const AudioChannelSet& layout)
{
if (auto* bus = getBus (isInputBus, busIndex))
{
auto layouts = bus->getBusesLayoutForLayoutChangeOfBus (layout);
if (layouts.getChannelSet (isInputBus, busIndex) == layout)
return applyBusLayouts (layouts);
return false;
}
jassertfalse; // busIndex parameter is invalid
return false;
}
bool AudioProcessor::enableAllBuses()
{
BusesLayout layouts;
for (auto& i : inputBuses) layouts.inputBuses.add (i->lastLayout);
for (auto& i : outputBuses) layouts.outputBuses.add (i->lastLayout);
return setBusesLayout (layouts);
}
bool AudioProcessor::checkBusesLayoutSupported (const BusesLayout& layouts) const
{
if (layouts.inputBuses.size() == inputBuses.size()
&& layouts.outputBuses.size() == outputBuses.size())
return isBusesLayoutSupported (layouts);
return false;
}
void AudioProcessor::getNextBestLayout (const BusesLayout& desiredLayout, BusesLayout& actualLayouts) const
{
// if you are hitting this assertion then you are requesting a next
// best layout which does not have the same number of buses as the
// audio processor.
jassert (desiredLayout.inputBuses.size() == inputBuses.size()
&& desiredLayout.outputBuses.size() == outputBuses.size());
if (checkBusesLayoutSupported (desiredLayout))
{
actualLayouts = desiredLayout;
return;
}
auto originalState = actualLayouts;
auto currentState = originalState;
auto bestSupported = currentState;
for (int dir = 0; dir < 2; ++dir)
{
const bool isInput = (dir > 0);
auto& currentLayouts = (isInput ? currentState.inputBuses : currentState.outputBuses);
auto& bestLayouts = (isInput ? bestSupported.inputBuses : bestSupported.outputBuses);
auto& requestedLayouts = (isInput ? desiredLayout.inputBuses : desiredLayout.outputBuses);
auto& originalLayouts = (isInput ? originalState.inputBuses : originalState.outputBuses);
for (int busIndex = 0; busIndex < requestedLayouts.size(); ++busIndex)
{
auto& best = bestLayouts .getReference (busIndex);
auto& requested = requestedLayouts.getReference (busIndex);
auto& original = originalLayouts .getReference (busIndex);
// do we need to do anything
if (original == requested)
continue;
currentState = bestSupported;
auto& current = currentLayouts .getReference (busIndex);
// already supported?
current = requested;
if (checkBusesLayoutSupported (currentState))
{
bestSupported = currentState;
continue;
}
// try setting the opposite bus to the identical layout
const bool oppositeDirection = ! isInput;
if (getBusCount (oppositeDirection) > busIndex)
{
auto& oppositeLayout = (oppositeDirection ? currentState.inputBuses : currentState.outputBuses).getReference (busIndex);
oppositeLayout = requested;
if (checkBusesLayoutSupported (currentState))
{
bestSupported = currentState;
continue;
}
// try setting the default layout
oppositeLayout = getBus (oppositeDirection, busIndex)->getDefaultLayout();
if (checkBusesLayoutSupported (currentState))
{
bestSupported = currentState;
continue;
}
}
// try setting all other buses to the identical layout
BusesLayout allTheSame;
allTheSame.inputBuses.insertMultiple (-1, requested, getBusCount (true));
allTheSame.outputBuses.insertMultiple (-1, requested, getBusCount (false));
if (checkBusesLayoutSupported (allTheSame))
{
bestSupported = allTheSame;
continue;
}
// what is closer the default or the current layout?
auto distance = std::abs (best.size() - requested.size());
auto& defaultLayout = getBus (isInput, busIndex)->getDefaultLayout();
if (std::abs (defaultLayout.size() - requested.size()) < distance)
{
current = defaultLayout;
if (checkBusesLayoutSupported (currentState))
bestSupported = currentState;
}
}
}
actualLayouts = bestSupported;
}
//==============================================================================
void AudioProcessor::setPlayHead (AudioPlayHead* newPlayHead)
{
playHead = newPlayHead;
}
void AudioProcessor::addListener (AudioProcessorListener* newListener)
{
const ScopedLock sl (listenerLock);
listeners.addIfNotAlreadyThere (newListener);
}
void AudioProcessor::removeListener (AudioProcessorListener* listenerToRemove)
{
const ScopedLock sl (listenerLock);
listeners.removeFirstMatchingValue (listenerToRemove);
}
void AudioProcessor::setPlayConfigDetails (int newNumIns, int newNumOuts, double newSampleRate, int newBlockSize)
{
[[maybe_unused]] bool success = true;
if (getTotalNumInputChannels() != newNumIns)
success &= setChannelLayoutOfBus (true, 0, AudioChannelSet::canonicalChannelSet (newNumIns));
// failed to find a compatible input configuration
jassert (success);
if (getTotalNumOutputChannels() != newNumOuts)
success &= setChannelLayoutOfBus (false, 0, AudioChannelSet::canonicalChannelSet (newNumOuts));
// failed to find a compatible output configuration
jassert (success);
// if the user is using this method then they do not want any side-buses or aux outputs
success &= disableNonMainBuses();
jassert (success);
// the processor may not support this arrangement at all
jassert (success && newNumIns == getTotalNumInputChannels() && newNumOuts == getTotalNumOutputChannels());
setRateAndBufferSizeDetails (newSampleRate, newBlockSize);
}
void AudioProcessor::setRateAndBufferSizeDetails (double newSampleRate, int newBlockSize) noexcept
{
currentSampleRate = newSampleRate;
blockSize = newBlockSize;
}
//==============================================================================
void AudioProcessor::numChannelsChanged() {}
void AudioProcessor::numBusesChanged() {}
void AudioProcessor::processorLayoutsChanged() {}
int AudioProcessor::getChannelIndexInProcessBlockBuffer (bool isInput, int busIndex, int channelIndex) const noexcept
{
auto& ioBus = isInput ? inputBuses : outputBuses;
jassert (isPositiveAndBelow (busIndex, ioBus.size()));
for (int i = 0; i < ioBus.size() && i < busIndex; ++i)
channelIndex += getChannelCountOfBus (isInput, i);
return channelIndex;
}
int AudioProcessor::getOffsetInBusBufferForAbsoluteChannelIndex (bool isInput, int absoluteChannelIndex, int& busIndex) const noexcept
{
auto numBuses = getBusCount (isInput);
int numChannels = 0;
for (busIndex = 0; busIndex < numBuses && absoluteChannelIndex >= (numChannels = getChannelLayoutOfBus (isInput, busIndex).size()); ++busIndex)
absoluteChannelIndex -= numChannels;
return busIndex >= numBuses ? -1 : absoluteChannelIndex;
}
//==============================================================================
void AudioProcessor::setNonRealtime (bool newNonRealtime) noexcept
{
nonRealtime = newNonRealtime;
}
void AudioProcessor::setLatencySamples (int newLatency)
{
if (latencySamples != newLatency)
{
latencySamples = newLatency;
updateHostDisplay (AudioProcessorListener::ChangeDetails().withLatencyChanged (true));
}
}
//==============================================================================
AudioProcessorListener* AudioProcessor::getListenerLocked (int index) const noexcept
{
const ScopedLock sl (listenerLock);
return listeners[index];
}
void AudioProcessor::updateHostDisplay (const AudioProcessorListener::ChangeDetails& details)
{
for (int i = listeners.size(); --i >= 0;)
if (auto l = getListenerLocked (i))
l->audioProcessorChanged (this, details);
}
void AudioProcessor::validateParameter (AudioProcessorParameter* param)
{
checkForDuplicateParamID (param);
checkForDuplicateTrimmedParamID (param);
/* If you're building this plugin as an AudioUnit, and you intend to use the plugin in
Logic Pro or GarageBand, it's a good idea to set version hints on all of your parameters
so that you can add parameters safely in future versions of the plugin.
See the documentation for AudioProcessorParameter(int) for more information.
*/
#if JucePlugin_Build_AU
static std::once_flag flag;
if (wrapperType != wrapperType_Undefined && param->getVersionHint() == 0)
std::call_once (flag, [] { jassertfalse; });
#endif
}
void AudioProcessor::checkForDuplicateTrimmedParamID ([[maybe_unused]] AudioProcessorParameter* param)
{
#if JUCE_DEBUG && ! JUCE_DISABLE_CAUTIOUS_PARAMETER_ID_CHECKING
if (auto* withID = dynamic_cast<HostedAudioProcessorParameter*> (param))
{
constexpr auto maximumSafeAAXParameterIdLength = 31;
const auto paramID = withID->getParameterID();
// If you hit this assertion, a parameter name is too long to be supported
// by the AAX plugin format.
// If there's a chance that you'll release this plugin in AAX format, you
// should consider reducing the length of this paramID.
// If you need to retain backwards-compatibility and are unable to change
// the paramID for this reason, you can add JUCE_DISABLE_CAUTIOUS_PARAMETER_ID_CHECKING
// to your preprocessor definitions to silence this assertion.
jassertquiet (paramID.length() <= maximumSafeAAXParameterIdLength);
// If you hit this assertion, two or more parameters have duplicate paramIDs
// after they have been truncated to support the AAX format.
// This is a serious issue, and will prevent the duplicated parameters from
// being automated when running as an AAX plugin.
// If there's a chance that you'll release this plugin in AAX format, you
// should reduce the length of this paramID.
// If you need to retain backwards-compatibility and are unable to change
// the paramID for this reason, you can add JUCE_DISABLE_CAUTIOUS_PARAMETER_ID_CHECKING
// to your preprocessor definitions to silence this assertion.
jassertquiet (trimmedParamIDs.insert (paramID.substring (0, maximumSafeAAXParameterIdLength)).second);
}
#endif
}
void AudioProcessor::checkForDuplicateParamID ([[maybe_unused]] AudioProcessorParameter* param)
{
#if JUCE_DEBUG
if (auto* withID = dynamic_cast<HostedAudioProcessorParameter*> (param))
{
auto insertResult = paramIDs.insert (withID->getParameterID());
// If you hit this assertion then the parameter ID is not unique
jassert (insertResult.second);
}
#endif
}
void AudioProcessor::checkForDuplicateGroupIDs ([[maybe_unused]] const AudioProcessorParameterGroup& newGroup)
{
#if JUCE_DEBUG
auto groups = newGroup.getSubgroups (true);
groups.add (&newGroup);
for (auto* group : groups)
{
auto insertResult = groupIDs.insert (group->getID());
// If you hit this assertion then a group ID is not unique
jassert (insertResult.second);
}
#endif
}
const Array<AudioProcessorParameter*>& AudioProcessor::getParameters() const { return flatParameterList; }
const AudioProcessorParameterGroup& AudioProcessor::getParameterTree() const { return parameterTree; }
void AudioProcessor::addParameter (AudioProcessorParameter* param)
{
jassert (param != nullptr);
parameterTree.addChild (std::unique_ptr<AudioProcessorParameter> (param));
param->processor = this;
param->parameterIndex = flatParameterList.size();
flatParameterList.add (param);
validateParameter (param);
}
void AudioProcessor::addParameterGroup (std::unique_ptr<AudioProcessorParameterGroup> group)
{
jassert (group != nullptr);
checkForDuplicateGroupIDs (*group);
auto oldSize = flatParameterList.size();
flatParameterList.addArray (group->getParameters (true));
for (int i = oldSize; i < flatParameterList.size(); ++i)
{
auto p = flatParameterList.getUnchecked (i);
p->processor = this;
p->parameterIndex = i;
validateParameter (p);
}
parameterTree.addChild (std::move (group));
}
void AudioProcessor::setParameterTree (AudioProcessorParameterGroup&& newTree)
{
#if JUCE_DEBUG
paramIDs.clear();
groupIDs.clear();
#endif
parameterTree = std::move (newTree);
checkForDuplicateGroupIDs (parameterTree);
flatParameterList = parameterTree.getParameters (true);
for (int i = 0; i < flatParameterList.size(); ++i)
{
auto p = flatParameterList.getUnchecked (i);
p->processor = this;
p->parameterIndex = i;
validateParameter (p);
}
}
void AudioProcessor::refreshParameterList() {}
int AudioProcessor::getDefaultNumParameterSteps() noexcept
{
return 0x7fffffff;
}
void AudioProcessor::suspendProcessing (const bool shouldBeSuspended)
{
const ScopedLock sl (callbackLock);
suspended = shouldBeSuspended;
}
void AudioProcessor::reset() {}
template <typename floatType>
void AudioProcessor::processBypassed (AudioBuffer<floatType>& buffer, MidiBuffer&)
{
// If you hit this assertion then your plug-in is reporting that it introduces
// some latency, but you haven't overridden processBlockBypassed to produce
// an identical amount of latency. Without identical latency in
// processBlockBypassed a host's latency compensation could shift the audio
// passing through your bypassed plug-in forward in time.
jassert (getLatencySamples() == 0);
for (int ch = getMainBusNumInputChannels(); ch < getTotalNumOutputChannels(); ++ch)
buffer.clear (ch, 0, buffer.getNumSamples());
}
void AudioProcessor::processBlockBypassed (AudioBuffer<float>& buffer, MidiBuffer& midi) { processBypassed (buffer, midi); }
void AudioProcessor::processBlockBypassed (AudioBuffer<double>& buffer, MidiBuffer& midi) { processBypassed (buffer, midi); }
void AudioProcessor::processBlock ([[maybe_unused]] AudioBuffer<double>& buffer,
[[maybe_unused]] MidiBuffer& midiMessages)
{
// If you hit this assertion then either the caller called the double
// precision version of processBlock on a processor which does not support it
// (i.e. supportsDoublePrecisionProcessing() returns false), or the implementation
// of the AudioProcessor forgot to override the double precision version of this method
jassertfalse;
}
bool AudioProcessor::supportsDoublePrecisionProcessing() const
{
return false;
}
void AudioProcessor::setProcessingPrecision (ProcessingPrecision precision) noexcept
{
// If you hit this assertion then you're trying to use double precision
// processing on a processor which does not support it!
jassert (precision != doublePrecision || supportsDoublePrecisionProcessing());
processingPrecision = precision;
}
//==============================================================================
static String getChannelName (const OwnedArray<AudioProcessor::Bus>& buses, int index)
{
return buses.size() > 0 ? AudioChannelSet::getChannelTypeName (buses[0]->getCurrentLayout().getTypeOfChannel (index)) : String();
}
const String AudioProcessor::getInputChannelName (int index) const { return getChannelName (inputBuses, index); }
const String AudioProcessor::getOutputChannelName (int index) const { return getChannelName (outputBuses, index); }
static bool isStereoPair (const OwnedArray<AudioProcessor::Bus>& buses, int index)
{
return index < 2
&& buses.size() > 0
&& buses[0]->getCurrentLayout() == AudioChannelSet::stereo();
}
bool AudioProcessor::isInputChannelStereoPair (int index) const { return isStereoPair (inputBuses, index); }
bool AudioProcessor::isOutputChannelStereoPair (int index) const { return isStereoPair (outputBuses, index); }
//==============================================================================
void AudioProcessor::createBus (bool inputBus, const BusProperties& ioConfig)
{
(inputBus ? inputBuses : outputBuses).add (new Bus (*this, ioConfig.busName, ioConfig.defaultLayout, ioConfig.isActivatedByDefault));
audioIOChanged (true, ioConfig.isActivatedByDefault);
}
//==============================================================================
AudioProcessor::BusesProperties AudioProcessor::busesPropertiesFromLayoutArray (const Array<InOutChannelPair>& config)
{
BusesProperties ioProps;
if (config[0].inChannels > 0)
ioProps.addBus (true, "Input", AudioChannelSet::canonicalChannelSet (config[0].inChannels));
if (config[0].outChannels > 0)
ioProps.addBus (false, "Output", AudioChannelSet::canonicalChannelSet (config[0].outChannels));
return ioProps;
}
AudioProcessor::BusesLayout AudioProcessor::getNextBestLayoutInList (const BusesLayout& layouts,
const Array<InOutChannelPair>& legacyLayouts) const
{
auto numChannelConfigs = legacyLayouts.size();
jassert (numChannelConfigs > 0);
bool hasInputs = false, hasOutputs = false;
for (int i = 0; i < numChannelConfigs; ++i)
{
if (legacyLayouts[i].inChannels > 0)
{
hasInputs = true;
break;
}
}
for (int i = 0; i < numChannelConfigs; ++i)
{
if (legacyLayouts[i].outChannels > 0)
{
hasOutputs = true;
break;
}
}
auto nearest = layouts;
nearest.inputBuses .resize (hasInputs ? 1 : 0);
nearest.outputBuses.resize (hasOutputs ? 1 : 0);
auto* inBus = (hasInputs ? &nearest.inputBuses. getReference (0) : nullptr);
auto* outBus = (hasOutputs ? &nearest.outputBuses.getReference (0) : nullptr);
auto inNumChannelsRequested = static_cast<int16> (inBus != nullptr ? inBus->size() : 0);
auto outNumChannelsRequested = static_cast<int16> (outBus != nullptr ? outBus->size() : 0);
auto distance = std::numeric_limits<int32>::max();
int bestConfiguration = 0;
for (int i = 0; i < numChannelConfigs; ++i)
{
auto inChannels = legacyLayouts.getReference (i).inChannels;
auto outChannels = legacyLayouts.getReference (i).outChannels;
auto channelDifference = ((std::abs (inChannels - inNumChannelsRequested) & 0xffff) << 16)
| ((std::abs (outChannels - outNumChannelsRequested) & 0xffff) << 0);
if (channelDifference < distance)
{
distance = channelDifference;
bestConfiguration = i;
// we can exit if we found a perfect match
if (distance == 0)
return nearest;
}
}
auto inChannels = legacyLayouts.getReference (bestConfiguration).inChannels;
auto outChannels = legacyLayouts.getReference (bestConfiguration).outChannels;
auto currentState = getBusesLayout();
auto currentInLayout = (getBusCount (true) > 0 ? currentState.inputBuses .getReference(0) : AudioChannelSet());
auto currentOutLayout = (getBusCount (false) > 0 ? currentState.outputBuses.getReference(0) : AudioChannelSet());
if (inBus != nullptr)
{
if (inChannels == 0) *inBus = AudioChannelSet::disabled();
else if (inChannels == currentInLayout. size()) *inBus = currentInLayout;
else if (inChannels == currentOutLayout.size()) *inBus = currentOutLayout;
else *inBus = AudioChannelSet::canonicalChannelSet (inChannels);
}
if (outBus != nullptr)
{
if (outChannels == 0) *outBus = AudioChannelSet::disabled();
else if (outChannels == currentOutLayout.size()) *outBus = currentOutLayout;
else if (outChannels == currentInLayout .size()) *outBus = currentInLayout;
else *outBus = AudioChannelSet::canonicalChannelSet (outChannels);
}
return nearest;
}
bool AudioProcessor::containsLayout (const BusesLayout& layouts, const Array<InOutChannelPair>& channelLayouts)
{
if (layouts.inputBuses.size() > 1 || layouts.outputBuses.size() > 1)
return false;
const InOutChannelPair mainLayout (static_cast<int16> (layouts.getNumChannels (true, 0)),
static_cast<int16> (layouts.getNumChannels (false, 0)));
return channelLayouts.contains (mainLayout);
}
//==============================================================================
bool AudioProcessor::disableNonMainBuses()
{
auto layouts = getBusesLayout();
for (int busIndex = 1; busIndex < layouts.inputBuses.size(); ++busIndex)
layouts.inputBuses.getReference (busIndex) = AudioChannelSet::disabled();
for (int busIndex = 1; busIndex < layouts.outputBuses.size(); ++busIndex)
layouts.outputBuses.getReference (busIndex) = AudioChannelSet::disabled();
return setBusesLayout (layouts);
}
// Unfortunately the deprecated getInputSpeakerArrangement/getOutputSpeakerArrangement return
// references to strings. Therefore we need to keep a copy. Once getInputSpeakerArrangement is
// removed, we can also remove this function
void AudioProcessor::updateSpeakerFormatStrings()
{
cachedInputSpeakerArrString.clear();
cachedOutputSpeakerArrString.clear();
if (getBusCount (true) > 0)
cachedInputSpeakerArrString = getBus (true, 0)->getCurrentLayout().getSpeakerArrangementAsString();
if (getBusCount (false) > 0)
cachedOutputSpeakerArrString = getBus (false, 0)->getCurrentLayout().getSpeakerArrangementAsString();
}
bool AudioProcessor::applyBusLayouts (const BusesLayout& layouts)
{
if (layouts == getBusesLayout())
return true;
auto numInputBuses = getBusCount (true);
auto numOutputBuses = getBusCount (false);
auto oldNumberOfIns = getTotalNumInputChannels();
auto oldNumberOfOuts = getTotalNumOutputChannels();
if (layouts.inputBuses. size() != numInputBuses
|| layouts.outputBuses.size() != numOutputBuses)
return false;
int newNumberOfIns = 0, newNumberOfOuts = 0;
for (int busIndex = 0; busIndex < numInputBuses; ++busIndex)
{
auto& bus = *getBus (true, busIndex);
const auto& set = layouts.getChannelSet (true, busIndex);
bus.layout = set;
if (! set.isDisabled())
bus.lastLayout = set;
newNumberOfIns += set.size();
}
for (int busIndex = 0; busIndex < numOutputBuses; ++busIndex)
{
auto& bus = *getBus (false, busIndex);
const auto& set = layouts.getChannelSet (false, busIndex);
bus.layout = set;
if (! set.isDisabled())
bus.lastLayout = set;
newNumberOfOuts += set.size();
}
const bool channelNumChanged = (oldNumberOfIns != newNumberOfIns || oldNumberOfOuts != newNumberOfOuts);
audioIOChanged (false, channelNumChanged);
return true;
}
void AudioProcessor::audioIOChanged (bool busNumberChanged, bool channelNumChanged)
{
auto numInputBuses = getBusCount (true);
auto numOutputBuses = getBusCount (false);
for (int dir = 0; dir < 2; ++dir)
{
const bool isInput = (dir == 0);
auto num = (isInput ? numInputBuses : numOutputBuses);
for (int i = 0; i < num; ++i)
if (auto* bus = getBus (isInput, i))
bus->updateChannelCount();
}
auto countTotalChannels = [] (const OwnedArray<AudioProcessor::Bus>& buses) noexcept
{
int n = 0;
for (auto* bus : buses)
n += bus->getNumberOfChannels();
return n;
};
cachedTotalIns = countTotalChannels (inputBuses);
cachedTotalOuts = countTotalChannels (outputBuses);
updateSpeakerFormatStrings();
if (busNumberChanged)
numBusesChanged();
if (channelNumChanged)
numChannelsChanged();
processorLayoutsChanged();
}
//==============================================================================
void AudioProcessor::editorBeingDeleted (AudioProcessorEditor* const editor) noexcept
{
const ScopedLock sl (activeEditorLock);
if (activeEditor == editor)
activeEditor = nullptr;
}
AudioProcessorEditor* AudioProcessor::getActiveEditor() const noexcept
{
const ScopedLock sl (activeEditorLock);
return activeEditor;
}
AudioProcessorEditor* AudioProcessor::createEditorIfNeeded()
{
const ScopedLock sl (activeEditorLock);
if (activeEditor != nullptr)
return activeEditor;
auto* ed = createEditor();
if (ed != nullptr)
{
// you must give your editor comp a size before returning it..
jassert (ed->getWidth() > 0 && ed->getHeight() > 0);
activeEditor = ed;
}
// You must make your hasEditor() method return a consistent result!
jassert (hasEditor() == (ed != nullptr));
return ed;
}
//==============================================================================
void AudioProcessor::getCurrentProgramStateInformation (juce::MemoryBlock& destData)
{
getStateInformation (destData);
}
void AudioProcessor::setCurrentProgramStateInformation (const void* data, int sizeInBytes)
{
setStateInformation (data, sizeInBytes);
}
//==============================================================================
void AudioProcessor::updateTrackProperties (const AudioProcessor::TrackProperties&) {}
//==============================================================================
// magic number to identify memory blocks that we've stored as XML
const uint32 magicXmlNumber = 0x21324356;
void AudioProcessor::copyXmlToBinary (const XmlElement& xml, juce::MemoryBlock& destData)
{
{
MemoryOutputStream out (destData, false);
out.writeInt (magicXmlNumber);
out.writeInt (0);
xml.writeTo (out, XmlElement::TextFormat().singleLine());
out.writeByte (0);
}
// go back and write the string length..
static_cast<uint32*> (destData.getData())[1]
= ByteOrder::swapIfBigEndian ((uint32) destData.getSize() - 9);
}
std::unique_ptr<XmlElement> AudioProcessor::getXmlFromBinary (const void* data, const int sizeInBytes)
{
if (sizeInBytes > 8 && ByteOrder::littleEndianInt (data) == magicXmlNumber)
{
auto stringLength = (int) ByteOrder::littleEndianInt (addBytesToPointer (data, 4));
if (stringLength > 0)
return parseXML (String::fromUTF8 (static_cast<const char*> (data) + 8,
jmin ((sizeInBytes - 8), stringLength)));
}
return {};
}
bool AudioProcessor::canApplyBusCountChange (bool isInput, bool isAdding,
AudioProcessor::BusProperties& outProperties)
{
if ( isAdding && ! canAddBus (isInput)) return false;
if (! isAdding && ! canRemoveBus (isInput)) return false;
auto num = getBusCount (isInput);
// No way for me to find out the default layout if there are no other busses!!
if (num == 0)
return false;
if (isAdding)
{
outProperties.busName = String (isInput ? "Input #" : "Output #") + String (getBusCount (isInput));
outProperties.defaultLayout = (num > 0 ? getBus (isInput, num - 1)->getDefaultLayout() : AudioChannelSet());
outProperties.isActivatedByDefault = true;
}
return true;
}
//==============================================================================
AudioProcessor::Bus::Bus (AudioProcessor& processor, const String& busName,
const AudioChannelSet& defaultLayout, bool isDfltEnabled)
: owner (processor), name (busName),
layout (isDfltEnabled ? defaultLayout : AudioChannelSet()),
dfltLayout (defaultLayout), lastLayout (defaultLayout),
enabledByDefault (isDfltEnabled)
{
// Your default layout cannot be disabled
jassert (! dfltLayout.isDisabled());
}
bool AudioProcessor::Bus::isInput() const noexcept { return owner.inputBuses.contains (this); }
int AudioProcessor::Bus::getBusIndex() const noexcept { return getDirectionAndIndex().index; }
AudioProcessor::Bus::BusDirectionAndIndex AudioProcessor::Bus::getDirectionAndIndex() const noexcept
{
BusDirectionAndIndex di;
di.index = owner.inputBuses.indexOf (this);
di.isInput = (di.index >= 0);
if (! di.isInput)
di.index = owner.outputBuses.indexOf (this);