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Add new juce_AudioProcessor_export.cpp file

tags/2018-04-16
falkTX 8 years ago
parent
commit
ec86a7adfe
1 changed files with 130 additions and 0 deletions
  1. +130
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      libs/juce/source/modules/juce_audio_processors/processors/juce_AudioProcessor_export.cpp

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libs/juce/source/modules/juce_audio_processors/processors/juce_AudioProcessor_export.cpp View File

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namespace juce {

static ThreadLocalValue<AudioProcessor::WrapperType> wrapperTypeBeingCreated;

void JUCE_CALLTYPE AudioProcessor::setTypeOfNextNewPlugin (AudioProcessor::WrapperType type)
{
wrapperTypeBeingCreated = type;
}

AudioProcessor::AudioProcessor()
: wrapperType (wrapperTypeBeingCreated.get()),
playHead (nullptr),
currentSampleRate (0),
blockSize (0),
latencySamples (0),
#if JUCE_DEBUG
textRecursionCheck (false),
#endif
suspended (false),
nonRealtime (false),
processingPrecision (singlePrecision)
{
#ifdef JucePlugin_PreferredChannelConfigurations
const short channelConfigs[][2] = { JucePlugin_PreferredChannelConfigurations };
#else
const short channelConfigs[][2] = { {2, 2} };
#endif

#if ! JucePlugin_IsMidiEffect
#if ! JucePlugin_IsSynth
busArrangement.inputBuses.add (AudioProcessorBus ("Input", AudioChannelSet::canonicalChannelSet (channelConfigs[0][0])));
#endif
busArrangement.outputBuses.add (AudioProcessorBus ("Output", AudioChannelSet::canonicalChannelSet (channelConfigs[0][1])));

#ifdef JucePlugin_PreferredChannelConfigurations
#if ! JucePlugin_IsSynth
AudioProcessor::setPreferredBusArrangement (true, 0, AudioChannelSet::stereo());
#endif
AudioProcessor::setPreferredBusArrangement (false, 0, AudioChannelSet::stereo());
#endif
#endif
updateSpeakerFormatStrings();
}

bool AudioProcessor::setPreferredBusArrangement (bool isInput, int busIndex, const AudioChannelSet& preferredSet)
{
const int oldNumInputs = getTotalNumInputChannels();
const int oldNumOutputs = getTotalNumOutputChannels();

Array<AudioProcessorBus>& buses = isInput ? busArrangement.inputBuses : busArrangement.outputBuses;

const int numBuses = buses.size();

if (! isPositiveAndBelow (busIndex, numBuses))
return false;

AudioProcessorBus& bus = buses.getReference (busIndex);

#ifdef JucePlugin_PreferredChannelConfigurations
// the user is using the deprecated way to specify channel configurations
if (numBuses > 0 && busIndex == 0)
{
const short channelConfigs[][2] = { JucePlugin_PreferredChannelConfigurations };
const int numChannelConfigs = sizeof (channelConfigs) / sizeof (*channelConfigs);

// we need the main bus in the opposite direction
Array<AudioProcessorBus>& oppositeBuses = isInput ? busArrangement.outputBuses : busArrangement.inputBuses;
AudioProcessorBus* oppositeBus = (busIndex < oppositeBuses.size()) ? &oppositeBuses.getReference (0) : nullptr;

// get the target number of channels
const int mainBusNumChannels = preferredSet.size();
const int mainBusOppositeChannels = (oppositeBus != nullptr) ? oppositeBus->channels.size() : 0;
const int dir = isInput ? 0 : 1;

// find a compatible channel configuration on the opposite bus which is the closest match
// to the current number of channels on that bus
int distance = std::numeric_limits<int>::max();
int bestConfiguration = -1;

for (int i = 0; i < numChannelConfigs; ++i)
{
// is the configuration compatible with the preferred set
if (channelConfigs[i][dir] == mainBusNumChannels)
{
const int configChannels = channelConfigs[i][dir^1];
const int channelDifference = std::abs (configChannels - mainBusOppositeChannels);

if (channelDifference < distance)
{
distance = channelDifference;
bestConfiguration = configChannels;

// we can exit if we found a perfect match
if (distance == 0)
break;
}
}
}

// unable to find a good configuration
if (bestConfiguration == -1)
return false;

// did the number of channels change on the opposite bus?
if (mainBusOppositeChannels != bestConfiguration && oppositeBus != nullptr)
{
// if the channels on the opposite bus are the same as the preferred set
// then also copy over the layout information. If not, then assume
// a cononical channel layout
if (bestConfiguration == mainBusNumChannels)
oppositeBus->channels = preferredSet;
else
oppositeBus->channels = AudioChannelSet::canonicalChannelSet (bestConfiguration);
}
}
#endif

bus.channels = preferredSet;

if (oldNumInputs != getTotalNumInputChannels() || oldNumOutputs != getTotalNumOutputChannels())
{
updateSpeakerFormatStrings();
numChannelsChanged();
}

return true;
}

}

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