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git subrepo clone --branch=sono6good https://github.com/essej/JUCE.git deps/juce

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  subdir:   "deps/juce"
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  origin:   "https://github.com/essej/JUCE.git"
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/*
==============================================================================
This file is part of the JUCE library.
Copyright (c) 2020 - Raw Material Software Limited
JUCE is an open source library subject to commercial or open-source
licensing.
The code included in this file is provided under the terms of the ISC license
http://www.isc.org/downloads/software-support-policy/isc-license. Permission
To use, copy, modify, and/or distribute this software for any purpose with or
without fee is hereby granted provided that the above copyright notice and
this permission notice appear in all copies.
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
{
//==============================================================================
/**
Manages the state of some audio and midi i/o devices.
This class keeps tracks of a currently-selected audio device, through
with which it continuously streams data from an audio callback, as well as
one or more midi inputs.
The idea is that your application will create one global instance of this object,
and let it take care of creating and deleting specific types of audio devices
internally. So when the device is changed, your callbacks will just keep running
without having to worry about this.
The manager can save and reload all of its device settings as XML, which
makes it very easy for you to save and reload the audio setup of your
application.
And to make it easy to let the user change its settings, there's a component
to do just that - the AudioDeviceSelectorComponent class, which contains a set of
device selection/sample-rate/latency controls.
To use an AudioDeviceManager, create one, and use initialise() to set it up. Then
call addAudioCallback() to register your audio callback with it, and use that to process
your audio data.
The manager also acts as a handy hub for incoming midi messages, allowing a
listener to register for messages from either a specific midi device, or from whatever
the current default midi input device is. The listener then doesn't have to worry about
re-registering with different midi devices if they are changed or deleted.
And yet another neat trick is that amount of CPU time being used is measured and
available with the getCpuUsage() method.
The AudioDeviceManager is a ChangeBroadcaster, and will send a change message to
listeners whenever one of its settings is changed.
@see AudioDeviceSelectorComponent, AudioIODevice, AudioIODeviceType
@tags{Audio}
*/
class JUCE_API AudioDeviceManager : public ChangeBroadcaster
{
public:
//==============================================================================
/** Creates a default AudioDeviceManager.
Initially no audio device will be selected. You should call the initialise() method
and register an audio callback with setAudioCallback() before it'll be able to
actually make any noise.
*/
AudioDeviceManager();
/** Destructor. */
~AudioDeviceManager() override;
//==============================================================================
/**
This structure holds a set of properties describing the current audio setup.
An AudioDeviceManager uses this class to save/load its current settings, and to
specify your preferred options when opening a device.
@see AudioDeviceManager::setAudioDeviceSetup(), AudioDeviceManager::initialise()
*/
struct JUCE_API AudioDeviceSetup
{
/** The name of the audio device used for output.
The name has to be one of the ones listed by the AudioDeviceManager's currently
selected device type.
This may be the same as the input device.
*/
String outputDeviceName;
/** The name of the audio device used for input.
This may be the same as the output device.
*/
String inputDeviceName;
/** The current sample rate.
This rate is used for both the input and output devices.
A value of 0 indicates that you don't care what rate is used, and the
device will choose a sensible rate for you.
*/
double sampleRate = 0;
/** The buffer size, in samples.
This buffer size is used for both the input and output devices.
A value of 0 indicates the default buffer size.
*/
int bufferSize = 0;
/** The set of active input channels.
The bits that are set in this array indicate the channels of the
input device that are active.
If useDefaultInputChannels is true, this value is ignored.
*/
BigInteger inputChannels;
/** If this is true, it indicates that the inputChannels array
should be ignored, and instead, the device's default channels
should be used.
*/
bool useDefaultInputChannels = true;
/** The set of active output channels.
The bits that are set in this array indicate the channels of the
input device that are active.
If useDefaultOutputChannels is true, this value is ignored.
*/
BigInteger outputChannels;
/** If this is true, it indicates that the outputChannels array
should be ignored, and instead, the device's default channels
should be used.
*/
bool useDefaultOutputChannels = true;
bool operator== (const AudioDeviceSetup&) const;
bool operator!= (const AudioDeviceSetup&) const;
};
//==============================================================================
/** Opens a set of audio devices ready for use.
This will attempt to open either a default audio device, or one that was
previously saved as XML.
@param numInputChannelsNeeded the maximum number of input channels your app would like to
use (the actual number of channels opened may be less than
the number requested)
@param numOutputChannelsNeeded the maximum number of output channels your app would like to
use (the actual number of channels opened may be less than
the number requested)
@param savedState either a previously-saved state that was produced
by createStateXml(), or nullptr if you want the manager
to choose the best device to open.
@param selectDefaultDeviceOnFailure if true, then if the device specified in the XML
fails to open, then a default device will be used
instead. If false, then on failure, no device is
opened.
@param preferredDefaultDeviceName if this is not empty, and there's a device with this
name, then that will be used as the default device
(assuming that there wasn't one specified in the XML).
The string can actually be a simple wildcard, containing "*"
and "?" characters
@param preferredSetupOptions if this is non-null, the structure will be used as the
set of preferred settings when opening the device. If you
use this parameter, the preferredDefaultDeviceName
field will be ignored. If you set the outputDeviceName
or inputDeviceName data members of the AudioDeviceSetup
to empty strings, then a default device will be used.
@returns an error message if anything went wrong, or an empty string if it worked ok.
*/
String initialise (int numInputChannelsNeeded,
int numOutputChannelsNeeded,
const XmlElement* savedState,
bool selectDefaultDeviceOnFailure,
const String& preferredDefaultDeviceName = String(),
const AudioDeviceSetup* preferredSetupOptions = nullptr);
/** Resets everything to a default device setup, clearing any stored settings. */
String initialiseWithDefaultDevices (int numInputChannelsNeeded,
int numOutputChannelsNeeded);
/** Returns some XML representing the current state of the manager.
This stores the current device, its samplerate, block size, etc, and
can be restored later with initialise().
Note that this can return a null pointer if no settings have been explicitly changed
(i.e. if the device manager has just been left in its default state).
*/
std::unique_ptr<XmlElement> createStateXml() const;
//==============================================================================
/** Returns the current device properties that are in use.
@see setAudioDeviceSetup
*/
AudioDeviceSetup getAudioDeviceSetup() const;
/** Returns the current device properties that are in use.
This is an old method, kept around for compatibility, but you should prefer the new
version which returns the result rather than taking an out-parameter.
@see getAudioDeviceSetup()
*/
void getAudioDeviceSetup (AudioDeviceSetup& result) const;
/** Changes the current device or its settings.
If you want to change a device property, like the current sample rate or
block size, you can call getAudioDeviceSetup() to retrieve the current
settings, then tweak the appropriate fields in the AudioDeviceSetup structure,
and pass it back into this method to apply the new settings.
@param newSetup the settings that you'd like to use.
If you don't need an input or output device, set the
inputDeviceName or outputDeviceName data members respectively
to empty strings. Note that this behaviour differs from
the behaviour of initialise().
@param treatAsChosenDevice if this is true and if the device opens correctly, these new
settings will be taken as having been explicitly chosen by the
user, and the next time createStateXml() is called, these settings
will be returned. If it's false, then the device is treated as a
temporary or default device, and a call to createStateXml() will
return either the last settings that were made with treatAsChosenDevice
as true, or the last XML settings that were passed into initialise().
@returns an error message if anything went wrong, or an empty string if it worked ok.
@see getAudioDeviceSetup
*/
String setAudioDeviceSetup (const AudioDeviceSetup& newSetup, bool treatAsChosenDevice);
/** Returns the currently-active audio device. */
AudioIODevice* getCurrentAudioDevice() const noexcept { return currentAudioDevice.get(); }
/** Returns the type of audio device currently in use.
@see setCurrentAudioDeviceType
*/
String getCurrentAudioDeviceType() const { return currentDeviceType; }
/** Returns the currently active audio device type object.
Don't keep a copy of this pointer - it's owned by the device manager and could
change at any time.
*/
AudioIODeviceType* getCurrentDeviceTypeObject() const;
/** Changes the class of audio device being used.
This switches between, e.g. ASIO and DirectSound. On the Mac you probably won't ever call
this because there's only one type: CoreAudio.
For a list of types, see getAvailableDeviceTypes().
*/
void setCurrentAudioDeviceType (const String& type, bool treatAsChosenDevice);
/** Closes the currently-open device.
You can call restartLastAudioDevice() later to reopen it in the same state
that it was just in.
*/
void closeAudioDevice();
/** Tries to reload the last audio device that was running.
Note that this only reloads the last device that was running before
closeAudioDevice() was called - it doesn't reload any kind of saved-state,
and can only be called after a device has been opened with setAudioDeviceSetup().
If a device is already open, this call will do nothing.
*/
void restartLastAudioDevice();
//==============================================================================
/** Registers an audio callback to be used.
The manager will redirect callbacks from whatever audio device is currently
in use to all registered callback objects. If more than one callback is
active, they will all be given the same input data, and their outputs will
be summed.
If necessary, this method will invoke audioDeviceAboutToStart() on the callback
object before returning.
To remove a callback, use removeAudioCallback().
*/
void addAudioCallback (AudioIODeviceCallback* newCallback);
/** Deregisters a previously added callback.
If necessary, this method will invoke audioDeviceStopped() on the callback
object before returning.
@see addAudioCallback
*/
void removeAudioCallback (AudioIODeviceCallback* callback);
//==============================================================================
/** Returns the average proportion of available CPU being spent inside the audio callbacks.
@returns A value between 0 and 1.0 to indicate the approximate proportion of CPU
time spent in the callbacks.
*/
double getCpuUsage() const;
//==============================================================================
/** Enables or disables a midi input device.
The list of devices can be obtained with the MidiInput::getAvailableDevices() method.
Any incoming messages from enabled input devices will be forwarded on to all the
listeners that have been registered with the addMidiInputDeviceCallback() method. They
can either register for messages from a particular device, or from just the "default"
midi input.
Routing the midi input via an AudioDeviceManager means that when a listener
registers for the default midi input, this default device can be changed by the
manager without the listeners having to know about it or re-register.
It also means that a listener can stay registered for a midi input that is disabled
or not present, so that when the input is re-enabled, the listener will start
receiving messages again.
@see addMidiInputDeviceCallback, isMidiInputDeviceEnabled
*/
void setMidiInputDeviceEnabled (const String& deviceIdentifier, bool enabled);
/** Returns true if a given midi input device is being used.
@see setMidiInputDeviceEnabled
*/
bool isMidiInputDeviceEnabled (const String& deviceIdentifier) const;
/** Registers a listener for callbacks when midi events arrive from a midi input.
The device identifier can be empty to indicate that it wants to receive all incoming
events from all the enabled MIDI inputs. Or it can be the identifier of one of the
MIDI input devices if it just wants the events from that device. (see
MidiInput::getAvailableDevices() for the list of devices).
Only devices which are enabled (see the setMidiInputDeviceEnabled() method) will have their
events forwarded on to listeners.
*/
void addMidiInputDeviceCallback (const String& deviceIdentifier,
MidiInputCallback* callback);
/** Removes a listener that was previously registered with addMidiInputDeviceCallback(). */
void removeMidiInputDeviceCallback (const String& deviceIdentifier,
MidiInputCallback* callback);
//==============================================================================
/** Sets a midi output device to use as the default.
The list of devices can be obtained with the MidiOutput::getAvailableDevices() method.
The specified device will be opened automatically and can be retrieved with the
getDefaultMidiOutput() method.
Pass in an empty string to deselect all devices. For the default device, you
can use MidiOutput::getDefaultDevice().
@see getDefaultMidiOutput, getDefaultMidiOutputIdentifier
*/
void setDefaultMidiOutputDevice (const String& deviceIdentifier);
/** Returns the name of the default midi output.
@see setDefaultMidiOutputDevice, getDefaultMidiOutput
*/
const String& getDefaultMidiOutputIdentifier() const noexcept { return defaultMidiOutputDeviceInfo.identifier; }
/** Returns the current default midi output device. If no device has been selected, or the
device can't be opened, this will return nullptr.
@see getDefaultMidiOutputIdentifier
*/
MidiOutput* getDefaultMidiOutput() const noexcept { return defaultMidiOutput.get(); }
//==============================================================================
/** Returns a list of the types of device supported. */
const OwnedArray<AudioIODeviceType>& getAvailableDeviceTypes();
/** Creates a list of available types.
This will add a set of new AudioIODeviceType objects to the specified list, to
represent each available types of device.
You can override this if your app needs to do something specific, like avoid
using DirectSound devices, etc.
*/
virtual void createAudioDeviceTypes (OwnedArray<AudioIODeviceType>& types);
/** Adds a new device type to the list of types. */
void addAudioDeviceType (std::unique_ptr<AudioIODeviceType> newDeviceType);
/** Removes a previously added device type from the manager. */
void removeAudioDeviceType (AudioIODeviceType* deviceTypeToRemove);
//==============================================================================
/** Plays a beep through the current audio device.
This is here to allow the audio setup UI panels to easily include a "test"
button so that the user can check where the audio is coming from.
*/
void playTestSound();
//==============================================================================
/**
A simple reference-counted struct that holds a level-meter value that can be read
using getCurrentLevel().
This is used to ensure that the level processing code is only executed when something
holds a reference to one of these objects and will be bypassed otherwise.
@see getInputLevelGetter, getOutputLevelGetter
*/
struct LevelMeter : public ReferenceCountedObject
{
LevelMeter() noexcept;
double getCurrentLevel() const noexcept;
using Ptr = ReferenceCountedObjectPtr<LevelMeter>;
private:
friend class AudioDeviceManager;
Atomic<float> level { 0 };
void updateLevel (const float* const*, int numChannels, int numSamples) noexcept;
};
/** Returns a reference-counted object that can be used to get the current input level.
You need to store this object locally to ensure that the reference count is incremented
and decremented properly. The current input level value can be read using getCurrentLevel().
*/
LevelMeter::Ptr getInputLevelGetter() noexcept { return inputLevelGetter; }
/** Returns a reference-counted object that can be used to get the current output level.
You need to store this object locally to ensure that the reference count is incremented
and decremented properly. The current output level value can be read using getCurrentLevel().
*/
LevelMeter::Ptr getOutputLevelGetter() noexcept { return outputLevelGetter; }
//==============================================================================
/** Returns the a lock that can be used to synchronise access to the audio callback.
Obviously while this is locked, you're blocking the audio thread from running, so
it must only be used for very brief periods when absolutely necessary.
*/
CriticalSection& getAudioCallbackLock() noexcept { return audioCallbackLock; }
/** Returns the a lock that can be used to synchronise access to the midi callback.
Obviously while this is locked, you're blocking the midi system from running, so
it must only be used for very brief periods when absolutely necessary.
*/
CriticalSection& getMidiCallbackLock() noexcept { return midiCallbackLock; }
//==============================================================================
/** Returns the number of under- or over runs reported.
This method will use the underlying device's native getXRunCount if it supports
it. Otherwise it will estimate the number of under-/overruns by measuring the
time it spent in the audio callback.
*/
int getXRunCount() const noexcept;
//==============================================================================
#ifndef DOXYGEN
[[deprecated ("Use setMidiInputDeviceEnabled instead.")]]
void setMidiInputEnabled (const String&, bool);
[[deprecated ("Use isMidiInputDeviceEnabled instead.")]]
bool isMidiInputEnabled (const String&) const;
[[deprecated ("Use addMidiInputDeviceCallback instead.")]]
void addMidiInputCallback (const String&, MidiInputCallback*);
[[deprecated ("Use removeMidiInputDeviceCallback instead.")]]
void removeMidiInputCallback (const String&, MidiInputCallback*);
[[deprecated ("Use setDefaultMidiOutputDevice instead.")]]
void setDefaultMidiOutput (const String&);
[[deprecated ("Use getDefaultMidiOutputIdentifier instead.")]]
const String& getDefaultMidiOutputName() const noexcept { return defaultMidiOutputDeviceInfo.name; }
#endif
private:
//==============================================================================
OwnedArray<AudioIODeviceType> availableDeviceTypes;
OwnedArray<AudioDeviceSetup> lastDeviceTypeConfigs;
AudioDeviceSetup currentSetup;
std::unique_ptr<AudioIODevice> currentAudioDevice;
Array<AudioIODeviceCallback*> callbacks;
int numInputChansNeeded = 0, numOutputChansNeeded = 2;
String preferredDeviceName, currentDeviceType;
std::unique_ptr<XmlElement> lastExplicitSettings;
mutable bool listNeedsScanning = true;
AudioBuffer<float> tempBuffer;
struct MidiCallbackInfo
{
String deviceIdentifier;
MidiInputCallback* callback;
};
Array<MidiDeviceInfo> midiDeviceInfosFromXml;
std::vector<std::unique_ptr<MidiInput>> enabledMidiInputs;
Array<MidiCallbackInfo> midiCallbacks;
MidiDeviceInfo defaultMidiOutputDeviceInfo;
std::unique_ptr<MidiOutput> defaultMidiOutput;
CriticalSection audioCallbackLock, midiCallbackLock;
std::unique_ptr<AudioBuffer<float>> testSound;
int testSoundPosition = 0;
AudioProcessLoadMeasurer loadMeasurer;
LevelMeter::Ptr inputLevelGetter { new LevelMeter() },
outputLevelGetter { new LevelMeter() };
//==============================================================================
class CallbackHandler;
std::unique_ptr<CallbackHandler> callbackHandler;
void audioDeviceIOCallbackInt (const float** inputChannelData, int totalNumInputChannels,
float** outputChannelData, int totalNumOutputChannels, int numSamples);
void audioDeviceAboutToStartInt (AudioIODevice*);
void audioDeviceStoppedInt();
void audioDeviceErrorInt (const String&);
void handleIncomingMidiMessageInt (MidiInput*, const MidiMessage&);
void audioDeviceListChanged();
String restartDevice (int blockSizeToUse, double sampleRateToUse,
const BigInteger& ins, const BigInteger& outs);
void stopDevice();
void updateXml();
void updateCurrentSetup();
void createDeviceTypesIfNeeded();
void scanDevicesIfNeeded();
void deleteCurrentDevice();
double chooseBestSampleRate (double preferred) const;
int chooseBestBufferSize (int preferred) const;
void insertDefaultDeviceNames (AudioDeviceSetup&) const;
String initialiseDefault (const String& preferredDefaultDeviceName, const AudioDeviceSetup*);
String initialiseFromXML (const XmlElement&, bool selectDefaultDeviceOnFailure,
const String& preferredDefaultDeviceName, const AudioDeviceSetup*);
AudioIODeviceType* findType (const String& inputName, const String& outputName);
AudioIODeviceType* findType (const String& typeName);
void pickCurrentDeviceTypeWithDevices();
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (AudioDeviceManager)
};
} // namespace juce

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/*
==============================================================================
This file is part of the JUCE library.
Copyright (c) 2020 - Raw Material Software Limited
JUCE is an open source library subject to commercial or open-source
licensing.
The code included in this file is provided under the terms of the ISC license
http://www.isc.org/downloads/software-support-policy/isc-license. Permission
To use, copy, modify, and/or distribute this software for any purpose with or
without fee is hereby granted provided that the above copyright notice and
this permission notice appear in all copies.
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
{
AudioIODevice::AudioIODevice (const String& deviceName, const String& deviceTypeName)
: name (deviceName), typeName (deviceTypeName)
{
}
AudioIODevice::~AudioIODevice() {}
void AudioIODeviceCallback::audioDeviceError (const String&) {}
bool AudioIODevice::setAudioPreprocessingEnabled (bool) { return false; }
bool AudioIODevice::hasControlPanel() const { return false; }
int AudioIODevice::getXRunCount() const noexcept { return -1; }
bool AudioIODevice::showControlPanel()
{
jassertfalse; // this should only be called for devices which return true from
// their hasControlPanel() method.
return false;
}
} // namespace juce

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/*
==============================================================================
This file is part of the JUCE library.
Copyright (c) 2020 - Raw Material Software Limited
JUCE is an open source library subject to commercial or open-source
licensing.
The code included in this file is provided under the terms of the ISC license
http://www.isc.org/downloads/software-support-policy/isc-license. Permission
To use, copy, modify, and/or distribute this software for any purpose with or
without fee is hereby granted provided that the above copyright notice and
this permission notice appear in all copies.
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
{
class AudioIODevice;
//==============================================================================
/**
One of these is passed to an AudioIODevice object to stream the audio data
in and out.
The AudioIODevice will repeatedly call this class's audioDeviceIOCallback()
method on its own high-priority audio thread, when it needs to send or receive
the next block of data.
@see AudioIODevice, AudioDeviceManager
@tags{Audio}
*/
class JUCE_API AudioIODeviceCallback
{
public:
/** Destructor. */
virtual ~AudioIODeviceCallback() = default;
/** Processes a block of incoming and outgoing audio data.
The subclass's implementation should use the incoming audio for whatever
purposes it needs to, and must fill all the output channels with the next
block of output data before returning.
The channel data is arranged with the same array indices as the channel name
array returned by AudioIODevice::getOutputChannelNames(), but those channels
that aren't specified in AudioIODevice::open() will have a null pointer for their
associated channel, so remember to check for this.
@param inputChannelData a set of arrays containing the audio data for each
incoming channel - this data is valid until the function
returns. There will be one channel of data for each input
channel that was enabled when the audio device was opened
(see AudioIODevice::open())
@param numInputChannels the number of pointers to channel data in the
inputChannelData array.
@param outputChannelData a set of arrays which need to be filled with the data
that should be sent to each outgoing channel of the device.
There will be one channel of data for each output channel
that was enabled when the audio device was opened (see
AudioIODevice::open())
The initial contents of the array is undefined, so the
callback function must fill all the channels with zeros if
its output is silence. Failing to do this could cause quite
an unpleasant noise!
@param numOutputChannels the number of pointers to channel data in the
outputChannelData array.
@param numSamples the number of samples in each channel of the input and
output arrays. The number of samples will depend on the
audio device's buffer size and will usually remain constant,
although this isn't guaranteed. For example, on Android,
on devices which support it, Android will chop up your audio
processing into several smaller callbacks to ensure higher audio
performance. So make sure your code can cope with reasonable
changes in the buffer size from one callback to the next.
*/
virtual void audioDeviceIOCallback (const float** inputChannelData,
int numInputChannels,
float** outputChannelData,
int numOutputChannels,
int numSamples) = 0;
/** Called to indicate that the device is about to start calling back.
This will be called just before the audio callbacks begin, either when this
callback has just been added to an audio device, or after the device has been
restarted because of a sample-rate or block-size change.
You can use this opportunity to find out the sample rate and block size
that the device is going to use by calling the AudioIODevice::getCurrentSampleRate()
and AudioIODevice::getCurrentBufferSizeSamples() on the supplied pointer.
@param device the audio IO device that will be used to drive the callback.
Note that if you're going to store this this pointer, it is
only valid until the next time that audioDeviceStopped is called.
*/
virtual void audioDeviceAboutToStart (AudioIODevice* device) = 0;
/** Called to indicate that the device has stopped. */
virtual void audioDeviceStopped() = 0;
/** This can be overridden to be told if the device generates an error while operating.
Be aware that this could be called by any thread! And not all devices perform
this callback.
*/
virtual void audioDeviceError (const String& errorMessage);
};
//==============================================================================
/**
Base class for an audio device with synchronised input and output channels.
Subclasses of this are used to implement different protocols such as DirectSound,
ASIO, CoreAudio, etc.
To create one of these, you'll need to use the AudioIODeviceType class - see the
documentation for that class for more info.
For an easier way of managing audio devices and their settings, have a look at the
AudioDeviceManager class.
@see AudioIODeviceType, AudioDeviceManager
@tags{Audio}
*/
class JUCE_API AudioIODevice
{
public:
/** Destructor. */
virtual ~AudioIODevice();
//==============================================================================
/** Returns the device's name, (as set in the constructor). */
const String& getName() const noexcept { return name; }
/** Returns the type of the device.
E.g. "CoreAudio", "ASIO", etc. - this comes from the AudioIODeviceType that created it.
*/
const String& getTypeName() const noexcept { return typeName; }
//==============================================================================
/** Returns the names of all the available output channels on this device.
To find out which of these are currently in use, call getActiveOutputChannels().
*/
virtual StringArray getOutputChannelNames() = 0;
/** Returns the names of all the available input channels on this device.
To find out which of these are currently in use, call getActiveInputChannels().
*/
virtual StringArray getInputChannelNames() = 0;
//==============================================================================
/** Returns the set of sample-rates this device supports.
@see getCurrentSampleRate
*/
virtual Array<double> getAvailableSampleRates() = 0;
/** Returns the set of buffer sizes that are available.
@see getCurrentBufferSizeSamples, getDefaultBufferSize
*/
virtual Array<int> getAvailableBufferSizes() = 0;
/** Returns the default buffer-size to use.
@returns a number of samples
@see getAvailableBufferSizes
*/
virtual int getDefaultBufferSize() = 0;
//==============================================================================
/** Tries to open the device ready to play.
@param inputChannels a BigInteger in which a set bit indicates that the corresponding
input channel should be enabled
@param outputChannels a BigInteger in which a set bit indicates that the corresponding
output channel should be enabled
@param sampleRate the sample rate to try to use - to find out which rates are
available, see getAvailableSampleRates()
@param bufferSizeSamples the size of i/o buffer to use - to find out the available buffer
sizes, see getAvailableBufferSizes()
@returns an error description if there's a problem, or an empty string if it succeeds in
opening the device
@see close
*/
virtual String open (const BigInteger& inputChannels,
const BigInteger& outputChannels,
double sampleRate,
int bufferSizeSamples) = 0;
/** Closes and releases the device if it's open. */
virtual void close() = 0;
/** Returns true if the device is still open.
A device might spontaneously close itself if something goes wrong, so this checks if
it's still open.
*/
virtual bool isOpen() = 0;
/** Starts the device actually playing.
This must be called after the device has been opened.
@param callback the callback to use for streaming the data.
@see AudioIODeviceCallback, open
*/
virtual void start (AudioIODeviceCallback* callback) = 0;
/** Stops the device playing.
Once a device has been started, this will stop it. Any pending calls to the
callback class will be flushed before this method returns.
*/
virtual void stop() = 0;
/** Returns true if the device is still calling back.
The device might mysteriously stop, so this checks whether it's
still playing.
*/
virtual bool isPlaying() = 0;
/** Returns the last error that happened if anything went wrong. */
virtual String getLastError() = 0;
//==============================================================================
/** Returns the buffer size that the device is currently using.
If the device isn't actually open, this value doesn't really mean much.
*/
virtual int getCurrentBufferSizeSamples() = 0;
/** Returns the sample rate that the device is currently using.
If the device isn't actually open, this value doesn't really mean much.
*/
virtual double getCurrentSampleRate() = 0;
/** Returns the device's current physical bit-depth.
If the device isn't actually open, this value doesn't really mean much.
*/
virtual int getCurrentBitDepth() = 0;
/** Returns a mask showing which of the available output channels are currently
enabled.
@see getOutputChannelNames
*/
virtual BigInteger getActiveOutputChannels() const = 0;
/** Returns a mask showing which of the available input channels are currently
enabled.
@see getInputChannelNames
*/
virtual BigInteger getActiveInputChannels() const = 0;
/** Returns the device's output latency.
This is the delay in samples between a callback getting a block of data, and
that data actually getting played.
*/
virtual int getOutputLatencyInSamples() = 0;
/** Returns the device's input latency.
This is the delay in samples between some audio actually arriving at the soundcard,
and the callback getting passed this block of data.
*/
virtual int getInputLatencyInSamples() = 0;
//==============================================================================
/** True if this device can show a pop-up control panel for editing its settings.
This is generally just true of ASIO devices. If true, you can call showControlPanel()
to display it.
*/
virtual bool hasControlPanel() const;
/** Shows a device-specific control panel if there is one.
This should only be called for devices which return true from hasControlPanel().
*/
virtual bool showControlPanel();
/** On devices which support it, this allows automatic gain control or other
mic processing to be disabled.
If the device doesn't support this operation, it'll return false.
*/
virtual bool setAudioPreprocessingEnabled (bool shouldBeEnabled);
//==============================================================================
/** Returns the number of under- or over runs reported by the OS since
playback/recording has started.
This number may be different than determining the Xrun count manually (by
measuring the time spent in the audio callback) as the OS may be doing
some buffering internally - especially on mobile devices.
Returns -1 if playback/recording has not started yet or if getting the underrun
count is not supported for this device (Android SDK 23 and lower).
*/
virtual int getXRunCount() const noexcept;
//==============================================================================
protected:
/** Creates a device, setting its name and type member variables. */
AudioIODevice (const String& deviceName,
const String& typeName);
/** @internal */
String name, typeName;
};
} // namespace juce

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/*
==============================================================================
This file is part of the JUCE library.
Copyright (c) 2020 - Raw Material Software Limited
JUCE is an open source library subject to commercial or open-source
licensing.
The code included in this file is provided under the terms of the ISC license
http://www.isc.org/downloads/software-support-policy/isc-license. Permission
To use, copy, modify, and/or distribute this software for any purpose with or
without fee is hereby granted provided that the above copyright notice and
this permission notice appear in all copies.
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
{
AudioIODeviceType::AudioIODeviceType (const String& name)
: typeName (name)
{
}
AudioIODeviceType::~AudioIODeviceType()
{
}
//==============================================================================
void AudioIODeviceType::addListener (Listener* l) { listeners.add (l); }
void AudioIODeviceType::removeListener (Listener* l) { listeners.remove (l); }
void AudioIODeviceType::callDeviceChangeListeners()
{
listeners.call ([] (Listener& l) { l.audioDeviceListChanged(); });
}
//==============================================================================
#if JUCE_MAC
AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_CoreAudio() { return new CoreAudioClasses::CoreAudioIODeviceType(); }
#else
AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_CoreAudio() { return nullptr; }
#endif
#if JUCE_IOS
AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_iOSAudio() { return new iOSAudioIODeviceType(); }
#else
AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_iOSAudio() { return nullptr; }
#endif
#if JUCE_WINDOWS && JUCE_WASAPI
AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_WASAPI (WASAPIDeviceMode deviceMode)
{
auto windowsVersion = SystemStats::getOperatingSystemType();
if (windowsVersion < SystemStats::WinVista
|| (WasapiClasses::isLowLatencyMode (deviceMode) && windowsVersion < SystemStats::Windows10))
return nullptr;
return new WasapiClasses::WASAPIAudioIODeviceType (deviceMode);
}
AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_WASAPI (bool exclusiveMode)
{
return createAudioIODeviceType_WASAPI (exclusiveMode ? WASAPIDeviceMode::exclusive
: WASAPIDeviceMode::shared);
}
#else
AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_WASAPI (WASAPIDeviceMode) { return nullptr; }
AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_WASAPI (bool) { return nullptr; }
#endif
#if JUCE_WINDOWS && JUCE_DIRECTSOUND
AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_DirectSound() { return new DSoundAudioIODeviceType(); }
#else
AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_DirectSound() { return nullptr; }
#endif
#if JUCE_WINDOWS && JUCE_ASIO
AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_ASIO() { return new ASIOAudioIODeviceType(); }
#else
AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_ASIO() { return nullptr; }
#endif
#if (JUCE_LINUX || JUCE_BSD) && JUCE_ALSA
AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_ALSA() { return createAudioIODeviceType_ALSA_PCMDevices(); }
#else
AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_ALSA() { return nullptr; }
#endif
#if (JUCE_LINUX || JUCE_BSD) && JUCE_JACK
AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_JACK() { return new JackAudioIODeviceType(); }
#else
AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_JACK() { return nullptr; }
#endif
#if JUCE_LINUX && JUCE_BELA
AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_Bela() { return new BelaAudioIODeviceType(); }
#else
AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_Bela() { return nullptr; }
#endif
#if JUCE_ANDROID
AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_Android()
{
#if JUCE_USE_ANDROID_OBOE
if (isOboeAvailable())
return nullptr;
#endif
#if JUCE_USE_ANDROID_OPENSLES
if (isOpenSLAvailable())
return nullptr;
#endif
return new AndroidAudioIODeviceType();
}
#else
AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_Android() { return nullptr; }
#endif
#if JUCE_ANDROID && JUCE_USE_ANDROID_OPENSLES
AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_OpenSLES()
{
return isOpenSLAvailable() ? new OpenSLAudioDeviceType() : nullptr;
}
#else
AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_OpenSLES() { return nullptr; }
#endif
#if JUCE_ANDROID && JUCE_USE_ANDROID_OBOE
AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_Oboe()
{
return isOboeAvailable() ? new OboeAudioIODeviceType() : nullptr;
}
#else
AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_Oboe() { return nullptr; }
#endif
} // namespace juce

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/*
==============================================================================
This file is part of the JUCE library.
Copyright (c) 2020 - Raw Material Software Limited
JUCE is an open source library subject to commercial or open-source
licensing.
The code included in this file is provided under the terms of the ISC license
http://www.isc.org/downloads/software-support-policy/isc-license. Permission
To use, copy, modify, and/or distribute this software for any purpose with or
without fee is hereby granted provided that the above copyright notice and
this permission notice appear in all copies.
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
{
//==============================================================================
/**
Represents a type of audio driver, such as DirectSound, ASIO, CoreAudio, etc.
To get a list of available audio driver types, use the AudioDeviceManager::createAudioDeviceTypes()
method. Each of the objects returned can then be used to list the available
devices of that type. E.g.
@code
OwnedArray<AudioIODeviceType> types;
myAudioDeviceManager.createAudioDeviceTypes (types);
for (int i = 0; i < types.size(); ++i)
{
String typeName (types[i]->getTypeName()); // This will be things like "DirectSound", "CoreAudio", etc.
types[i]->scanForDevices(); // This must be called before getting the list of devices
StringArray deviceNames (types[i]->getDeviceNames()); // This will now return a list of available devices of this type
for (int j = 0; j < deviceNames.size(); ++j)
{
AudioIODevice* device = types[i]->createDevice (deviceNames [j]);
...
}
}
@endcode
For an easier way of managing audio devices and their settings, have a look at the
AudioDeviceManager class.
@see AudioIODevice, AudioDeviceManager
@tags{Audio}
*/
class JUCE_API AudioIODeviceType
{
public:
//==============================================================================
/** Returns the name of this type of driver that this object manages.
This will be something like "DirectSound", "ASIO", "CoreAudio", "ALSA", etc.
*/
const String& getTypeName() const noexcept { return typeName; }
//==============================================================================
/** Refreshes the object's cached list of known devices.
This must be called at least once before calling getDeviceNames() or any of
the other device creation methods.
*/
virtual void scanForDevices() = 0;
/** Returns the list of available devices of this type.
The scanForDevices() method must have been called to create this list.
@param wantInputNames for devices which have separate inputs and outputs
this determines which list of names is returned
*/
virtual StringArray getDeviceNames (bool wantInputNames = false) const = 0;
/** Returns the name of the default device.
This will be one of the names from the getDeviceNames() list.
@param forInput if true, this means that a default input device should be
returned; if false, it should return the default output
*/
virtual int getDefaultDeviceIndex (bool forInput) const = 0;
/** Returns the index of a given device in the list of device names.
If asInput is true, it shows the index in the inputs list, otherwise it
looks for it in the outputs list.
*/
virtual int getIndexOfDevice (AudioIODevice* device, bool asInput) const = 0;
/** Returns true if two different devices can be used for the input and output.
*/
virtual bool hasSeparateInputsAndOutputs() const = 0;
/** Creates one of the devices of this type.
The deviceName must be one of the strings returned by getDeviceNames(), and
scanForDevices() must have been called before this method is used.
*/
virtual AudioIODevice* createDevice (const String& outputDeviceName,
const String& inputDeviceName) = 0;
//==============================================================================
/**
A class for receiving events when audio devices are inserted or removed.
You can register an AudioIODeviceType::Listener with an~AudioIODeviceType object
using the AudioIODeviceType::addListener() method, and it will be called when
devices of that type are added or removed.
@see AudioIODeviceType::addListener, AudioIODeviceType::removeListener
*/
class Listener
{
public:
virtual ~Listener() = default;
/** Called when the list of available audio devices changes. */
virtual void audioDeviceListChanged() = 0;
};
/** Adds a listener that will be called when this type of device is added or
removed from the system.
*/
void addListener (Listener* listener);
/** Removes a listener that was previously added with addListener(). */
void removeListener (Listener* listener);
//==============================================================================
/** Destructor. */
virtual ~AudioIODeviceType();
//==============================================================================
/** Creates a CoreAudio device type if it's available on this platform, or returns null. */
static AudioIODeviceType* createAudioIODeviceType_CoreAudio();
/** Creates an iOS device type if it's available on this platform, or returns null. */
static AudioIODeviceType* createAudioIODeviceType_iOSAudio();
/** Creates a WASAPI device type in the specified mode if it's available on this platform, or returns null. */
static AudioIODeviceType* createAudioIODeviceType_WASAPI (WASAPIDeviceMode deviceMode);
/** Creates a DirectSound device type if it's available on this platform, or returns null. */
static AudioIODeviceType* createAudioIODeviceType_DirectSound();
/** Creates an ASIO device type if it's available on this platform, or returns null. */
static AudioIODeviceType* createAudioIODeviceType_ASIO();
/** Creates an ALSA device type if it's available on this platform, or returns null. */
static AudioIODeviceType* createAudioIODeviceType_ALSA();
/** Creates a JACK device type if it's available on this platform, or returns null. */
static AudioIODeviceType* createAudioIODeviceType_JACK();
/** Creates an Android device type if it's available on this platform, or returns null. */
static AudioIODeviceType* createAudioIODeviceType_Android();
/** Creates an Android OpenSLES device type if it's available on this platform, or returns null. */
static AudioIODeviceType* createAudioIODeviceType_OpenSLES();
/** Creates an Oboe device type if it's available on this platform, or returns null. */
static AudioIODeviceType* createAudioIODeviceType_Oboe();
/** Creates a Bela device type if it's available on this platform, or returns null. */
static AudioIODeviceType* createAudioIODeviceType_Bela();
#ifndef DOXYGEN
[[deprecated ("You should call the method which takes a WASAPIDeviceMode instead.")]]
static AudioIODeviceType* createAudioIODeviceType_WASAPI (bool exclusiveMode);
#endif
protected:
explicit AudioIODeviceType (const String& typeName);
/** Synchronously calls all the registered device list change listeners. */
void callDeviceChangeListeners();
private:
String typeName;
ListenerList<Listener> listeners;
JUCE_DECLARE_NON_COPYABLE (AudioIODeviceType)
};
} // namespace juce

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/*
==============================================================================
This file is part of the JUCE library.
Copyright (c) 2020 - Raw Material Software Limited
JUCE is an open source library subject to commercial or open-source
licensing.
The code included in this file is provided under the terms of the ISC license
http://www.isc.org/downloads/software-support-policy/isc-license. Permission
To use, copy, modify, and/or distribute this software for any purpose with or
without fee is hereby granted provided that the above copyright notice and
this permission notice appear in all copies.
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
{
//==============================================================================
/**
Contains functions to control the system's master volume.
@tags{Audio}
*/
class JUCE_API SystemAudioVolume
{
public:
//==============================================================================
/** Returns the operating system's current volume level in the range 0 to 1.0 */
static float JUCE_CALLTYPE getGain();
/** Attempts to set the operating system's current volume level.
@param newGain the level, between 0 and 1.0
@returns true if the operation succeeds
*/
static bool JUCE_CALLTYPE setGain (float newGain);
/** Returns true if the system's audio output is currently muted. */
static bool JUCE_CALLTYPE isMuted();
/** Attempts to mute the operating system's audio output.
@param shouldBeMuted true if you want it to be muted
@returns true if the operation succeeds
*/
static bool JUCE_CALLTYPE setMuted (bool shouldBeMuted);
private:
SystemAudioVolume(); // Don't instantiate this class, just call its static fns.
JUCE_DECLARE_NON_COPYABLE (SystemAudioVolume)
};
} // namespace juce