Base class for an audio device with synchronised input and output channels. More...
#include <juce_AudioIODevice.h>
Public Member Functions | |
virtual | ~AudioIODevice () |
Destructor. More... | |
virtual void | close ()=0 |
Closes and releases the device if it's open. More... | |
virtual BigInteger | getActiveInputChannels () const =0 |
Returns a mask showing which of the available input channels are currently enabled. More... | |
virtual BigInteger | getActiveOutputChannels () const =0 |
Returns a mask showing which of the available output channels are currently enabled. More... | |
virtual Array< int > | getAvailableBufferSizes ()=0 |
Returns the set of buffer sizes that are available. More... | |
virtual Array< double > | getAvailableSampleRates ()=0 |
Returns the set of sample-rates this device supports. More... | |
virtual int | getCurrentBitDepth ()=0 |
Returns the device's current physical bit-depth. More... | |
virtual int | getCurrentBufferSizeSamples ()=0 |
Returns the buffer size that the device is currently using. More... | |
virtual double | getCurrentSampleRate ()=0 |
Returns the sample rate that the device is currently using. More... | |
virtual int | getDefaultBufferSize ()=0 |
Returns the default buffer-size to use. More... | |
virtual StringArray | getInputChannelNames ()=0 |
Returns the names of all the available input channels on this device. More... | |
virtual int | getInputLatencyInSamples ()=0 |
Returns the device's input latency. More... | |
virtual String | getLastError ()=0 |
Returns the last error that happened if anything went wrong. More... | |
const String & | getName () const noexcept |
Returns the device's name, (as set in the constructor). More... | |
virtual StringArray | getOutputChannelNames ()=0 |
Returns the names of all the available output channels on this device. More... | |
virtual int | getOutputLatencyInSamples ()=0 |
Returns the device's output latency. More... | |
const String & | getTypeName () const noexcept |
Returns the type of the device. More... | |
virtual int | getXRunCount () const noexcept |
Returns the number of under- or over runs reported by the OS since playback/recording has started. More... | |
virtual bool | hasControlPanel () const |
True if this device can show a pop-up control panel for editing its settings. More... | |
virtual bool | isOpen ()=0 |
Returns true if the device is still open. More... | |
virtual bool | isPlaying ()=0 |
Returns true if the device is still calling back. More... | |
virtual String | open (const BigInteger &inputChannels, const BigInteger &outputChannels, double sampleRate, int bufferSizeSamples)=0 |
Tries to open the device ready to play. More... | |
virtual bool | setAudioPreprocessingEnabled (bool shouldBeEnabled) |
On devices which support it, this allows automatic gain control or other mic processing to be disabled. More... | |
virtual bool | showControlPanel () |
Shows a device-specific control panel if there is one. More... | |
virtual void | start (AudioIODeviceCallback *callback)=0 |
Starts the device actually playing. More... | |
virtual void | stop ()=0 |
Stops the device playing. More... | |
Protected Member Functions | |
AudioIODevice (const String &deviceName, const String &typeName) | |
Creates a device, setting its name and type member variables. More... | |
Protected Attributes | |
String | name |
String | typeName |
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.
@tags{Audio}
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virtual |
Destructor.
Creates a device, setting its name and type member variables.
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pure virtual |
Closes and releases the device if it's open.
Implemented in juce::iOSAudioIODevice.
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pure virtual |
Returns a mask showing which of the available input channels are currently enabled.
Implemented in juce::iOSAudioIODevice.
Referenced by juce::StandalonePluginHolder::CallbackMaxSizeEnforcer::audioDeviceAboutToStart(), and juce::StandalonePluginHolder::audioDeviceAboutToStart().
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pure virtual |
Returns a mask showing which of the available output channels are currently enabled.
Implemented in juce::iOSAudioIODevice.
Referenced by juce::StandalonePluginHolder::CallbackMaxSizeEnforcer::audioDeviceAboutToStart().
Returns the set of buffer sizes that are available.
Implemented in juce::iOSAudioIODevice.
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pure virtual |
Returns the set of sample-rates this device supports.
Implemented in juce::iOSAudioIODevice.
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pure virtual |
Returns the device's current physical bit-depth.
If the device isn't actually open, this value doesn't really mean much.
Implemented in juce::iOSAudioIODevice.
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pure virtual |
Returns the buffer size that the device is currently using.
If the device isn't actually open, this value doesn't really mean much.
Implemented in juce::iOSAudioIODevice.
Referenced by juce::StandalonePluginHolder::CallbackMaxSizeEnforcer::audioDeviceAboutToStart(), and juce::StandalonePluginHolder::audioDeviceAboutToStart().
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pure virtual |
Returns the sample rate that the device is currently using.
If the device isn't actually open, this value doesn't really mean much.
Implemented in juce::iOSAudioIODevice.
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pure virtual |
Returns the default buffer-size to use.
Implemented in juce::iOSAudioIODevice.
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pure virtual |
Returns the names of all the available input channels on this device.
To find out which of these are currently in use, call getActiveInputChannels().
Implemented in juce::iOSAudioIODevice.
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pure virtual |
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.
Implemented in juce::iOSAudioIODevice.
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pure virtual |
Returns the last error that happened if anything went wrong.
Implemented in juce::iOSAudioIODevice.
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inlinenoexcept |
Returns the device's name, (as set in the constructor).
References juce::gl::name.
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pure virtual |
Returns the names of all the available output channels on this device.
To find out which of these are currently in use, call getActiveOutputChannels().
Implemented in juce::iOSAudioIODevice.
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pure virtual |
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.
Implemented in juce::iOSAudioIODevice.
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inlinenoexcept |
Returns the type of the device.
E.g. "CoreAudio", "ASIO", etc. - this comes from the AudioIODeviceType that created it.
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virtualnoexcept |
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).
Reimplemented in juce::iOSAudioIODevice.
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virtual |
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.
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pure virtual |
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.
Implemented in juce::iOSAudioIODevice.
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pure virtual |
Returns true if the device is still calling back.
The device might mysteriously stop, so this checks whether it's still playing.
Implemented in juce::iOSAudioIODevice.
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pure virtual |
Tries to open the device ready to play.
inputChannels | a BigInteger in which a set bit indicates that the corresponding input channel should be enabled |
outputChannels | a BigInteger in which a set bit indicates that the corresponding output channel should be enabled |
sampleRate | the sample rate to try to use - to find out which rates are available, see getAvailableSampleRates() |
bufferSizeSamples | the size of i/o buffer to use - to find out the available buffer sizes, see getAvailableBufferSizes() |
Implemented in juce::iOSAudioIODevice.
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.
Reimplemented in juce::iOSAudioIODevice.
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virtual |
Shows a device-specific control panel if there is one.
This should only be called for devices which return true from hasControlPanel().
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pure virtual |
Starts the device actually playing.
This must be called after the device has been opened.
callback | the callback to use for streaming the data. |
Implemented in juce::iOSAudioIODevice.
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pure virtual |
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.
Implemented in juce::iOSAudioIODevice.
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protected |
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protected |