OpenShot Library | libopenshot-audio
0.2.0
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Collects incoming realtime MIDI messages and turns them into blocks suitable for processing by a block-based audio callback. More...
#include <juce_MidiMessageCollector.h>
Public Member Functions | |
MidiMessageCollector () | |
Creates a MidiMessageCollector. | |
~MidiMessageCollector () override | |
Destructor. | |
void | reset (double sampleRate) |
Clears any messages from the queue. More... | |
void | addMessageToQueue (const MidiMessage &message) |
Takes an incoming real-time message and adds it to the queue. More... | |
void | removeNextBlockOfMessages (MidiBuffer &destBuffer, int numSamples) |
Removes all the pending messages from the queue as a buffer. More... | |
void | handleNoteOn (MidiKeyboardState *, int midiChannel, int midiNoteNumber, float velocity) override |
void | handleNoteOff (MidiKeyboardState *, int midiChannel, int midiNoteNumber, float velocity) override |
void | handleIncomingMidiMessage (MidiInput *, const MidiMessage &) override |
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virtual | ~MidiInputCallback ()=default |
Destructor. | |
virtual void | handlePartialSysexMessage (MidiInput *source, const uint8 *messageData, int numBytesSoFar, double timestamp) |
Notification sent each time a packet of a multi-packet sysex message arrives. More... | |
Collects incoming realtime MIDI messages and turns them into blocks suitable for processing by a block-based audio callback.
The class can also be used as either a MidiKeyboardStateListener or a MidiInputCallback so it can easily use a midi input or keyboard component as its source.
Definition at line 42 of file juce_MidiMessageCollector.h.
void juce::MidiMessageCollector::reset | ( | double | sampleRate | ) |
Clears any messages from the queue.
You need to call this method before starting to use the collector, so that it knows the correct sample rate to use.
Definition at line 35 of file juce_MidiMessageCollector.cpp.
References juce::MidiBuffer::clear(), and juce::Time::getMillisecondCounterHiRes().
void juce::MidiMessageCollector::addMessageToQueue | ( | const MidiMessage & | message | ) |
Takes an incoming real-time message and adds it to the queue.
The message's timestamp is taken, and it will be ready for retrieval as part of the block returned by the next call to removeNextBlockOfMessages().
This method is fully thread-safe when overlapping calls are made with removeNextBlockOfMessages().
Definition at line 48 of file juce_MidiMessageCollector.cpp.
References juce::MidiBuffer::addEvent(), juce::MidiBuffer::clear(), and juce::MidiMessage::getTimeStamp().
Referenced by handleIncomingMidiMessage(), handleNoteOff(), and handleNoteOn().
void juce::MidiMessageCollector::removeNextBlockOfMessages | ( | MidiBuffer & | destBuffer, |
int | numSamples | ||
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Removes all the pending messages from the queue as a buffer.
This will also correct the messages' timestamps to make sure they're in the range 0 to numSamples - 1.
This call should be made regularly by something like an audio processing callback, because the time that it happens is used in calculating the midi event positions.
This method is fully thread-safe when overlapping calls are made with addMessageToQueue().
Precondition: numSamples must be greater than 0.
Definition at line 70 of file juce_MidiMessageCollector.cpp.
References juce::MidiBuffer::addEvent(), juce::MidiBuffer::clear(), juce::Time::getMillisecondCounterHiRes(), juce::MidiBuffer::Iterator::getNextEvent(), juce::MidiBuffer::isEmpty(), and juce::MidiBuffer::Iterator::setNextSamplePosition().
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overridevirtual |
Implements juce::MidiKeyboardStateListener.
Definition at line 137 of file juce_MidiMessageCollector.cpp.
References addMessageToQueue(), juce::Time::getMillisecondCounterHiRes(), juce::MidiMessage::noteOn(), and juce::MidiMessage::setTimeStamp().
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overridevirtual |
Implements juce::MidiKeyboardStateListener.
Definition at line 145 of file juce_MidiMessageCollector.cpp.
References addMessageToQueue(), juce::Time::getMillisecondCounterHiRes(), juce::MidiMessage::noteOff(), and juce::MidiMessage::setTimeStamp().
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overridevirtual |
Implements juce::MidiInputCallback.
Definition at line 153 of file juce_MidiMessageCollector.cpp.
References addMessageToQueue().