OpenShot Library | libopenshot-audio
0.1.9
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Controls a physical MIDI output device. More...
#include <juce_MidiOutput.h>
Classes | |
struct | PendingMessage |
Public Member Functions | |
~MidiOutput () override | |
Destructor. More... | |
const String & | getName () const noexcept |
Returns the name of this device. More... | |
void | sendMessageNow (const MidiMessage &message) |
Sends out a MIDI message immediately. More... | |
void | sendBlockOfMessagesNow (const MidiBuffer &buffer) |
Sends out a sequence of MIDI messages immediately. More... | |
void | sendBlockOfMessages (const MidiBuffer &buffer, double millisecondCounterToStartAt, double samplesPerSecondForBuffer) |
This lets you supply a block of messages that will be sent out at some point in the future. More... | |
void | clearAllPendingMessages () |
Gets rid of any midi messages that had been added by sendBlockOfMessages(). More... | |
void | startBackgroundThread () |
Starts up a background thread so that the device can send blocks of data. More... | |
void | stopBackgroundThread () |
Stops the background thread, and clears any pending midi events. More... | |
Static Public Member Functions | |
static StringArray | getDevices () |
Returns a list of the available midi output devices. More... | |
static int | getDefaultDeviceIndex () |
Returns the index of the default midi output device to use. More... | |
static MidiOutput * | openDevice (int deviceIndex) |
Tries to open one of the midi output devices. More... | |
static MidiOutput * | createNewDevice (const String &deviceName) |
This will try to create a new midi output device (Not available on Windows). More... | |
Controls a physical MIDI output device.
To create one of these, use the static getDevices() method to get a list of the available output devices, then use the openDevice() method to try to open one.
Definition at line 41 of file juce_MidiOutput.h.
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override |
Destructor.
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Returns a list of the available midi output devices.
You can open one of the devices by passing its index into the openDevice() method.
Referenced by juce::AudioDeviceManager::setDefaultMidiOutput().
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Returns the index of the default midi output device to use.
This refers to the index in the list returned by getDevices().
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Tries to open one of the midi output devices.
This will return a MidiOutput object if it manages to open it. You can then send messages to this device, and delete it when no longer needed.
If the device can't be opened, this will return a null pointer.
deviceIndex | the index of a device from the list returned by getDevices() |
Referenced by juce::AudioDeviceManager::setDefaultMidiOutput().
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This will try to create a new midi output device (Not available on Windows).
This will attempt to create a new midi output device that other apps can connect to and use as their midi input.
Returns nullptr if a device can't be created.
deviceName | the name to use for the new device |
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inlinenoexcept |
Returns the name of this device.
Definition at line 91 of file juce_MidiOutput.h.
void juce::MidiOutput::sendMessageNow | ( | const MidiMessage & | message | ) |
Sends out a MIDI message immediately.
Referenced by sendBlockOfMessagesNow(), and stopBackgroundThread().
void juce::MidiOutput::sendBlockOfMessagesNow | ( | const MidiBuffer & | buffer | ) |
Sends out a sequence of MIDI messages immediately.
Definition at line 41 of file juce_MidiOutput.cpp.
References juce::MidiBuffer::Iterator::getNextEvent(), and sendMessageNow().
void juce::MidiOutput::sendBlockOfMessages | ( | const MidiBuffer & | buffer, |
double | millisecondCounterToStartAt, | ||
double | samplesPerSecondForBuffer | ||
) |
This lets you supply a block of messages that will be sent out at some point in the future.
The MidiOutput class has an internal thread that can send out timestamped messages - this appends a set of messages to its internal buffer, ready for sending.
This will only work if you've already started the thread with startBackgroundThread().
A time is specified, at which the block of messages should be sent. This time uses the same time base as Time::getMillisecondCounter(), and must be in the future.
The samplesPerSecondForBuffer parameter indicates the number of samples per second used by the MidiBuffer. Each event in a MidiBuffer has a sample position, and the samplesPerSecondForBuffer value is needed to convert this sample position to a real time.
Definition at line 51 of file juce_MidiOutput.cpp.
References juce::MidiBuffer::Iterator::getNextEvent(), juce::Thread::isThreadRunning(), and juce::Thread::notify().
void juce::MidiOutput::clearAllPendingMessages | ( | ) |
Gets rid of any midi messages that had been added by sendBlockOfMessages().
Definition at line 93 of file juce_MidiOutput.cpp.
Referenced by stopBackgroundThread().
void juce::MidiOutput::startBackgroundThread | ( | ) |
Starts up a background thread so that the device can send blocks of data.
Call this to get the device ready, before using sendBlockOfMessages().
Definition at line 105 of file juce_MidiOutput.cpp.
References juce::Thread::startThread().
void juce::MidiOutput::stopBackgroundThread | ( | ) |
Stops the background thread, and clears any pending midi events.
Definition at line 110 of file juce_MidiOutput.cpp.
References clearAllPendingMessages(), juce::Time::getMillisecondCounter(), juce::MidiMessage::getTimeStamp(), sendMessageNow(), juce::Thread::stopThread(), juce::Thread::threadShouldExit(), juce::Thread::wait(), and juce::Time::waitForMillisecondCounter().