public final Class ALC11

The alcCaptureCloseDevice function allows the application to disconnect from a capture device. The return code will be true or false, indicating success or failure. If the device is null or invalid, an ALC_INVALID_DEVICE error will be generated. Once closed, a capture device is invalid.

Returns:boolean

true if device was successfully closed

The alcCaptureOpenDevice function allows the application to connect to a capture device. To obtain a list of all available capture devices, use getCaptureDevices a list of all capture devices will be returned. Retrieving ALC_CAPTURE_DEVICE_SPECIFIER with a valid capture device specified will result in the name of that device being returned as a single string. If the function returns null, then no sound driver/device has been found, or the requested format could not be fulfilled. The "deviceName" argument is a string that requests a certain device or device configuration. If null is specified, the implementation will provide an implementation specific default. The "frequency" and "format" arguments specify the format that audio data will be presented to the application, and match the values that can be passed to alBufferData. The implementation is expected to convert and resample to this format on behalf of the application. The "buffersize" argument specifies the number of sample frames to buffer in the AL, for example, requesting a format of AL_FORMAT_STEREO16 and a buffer size of 1024 would require the AL to store up to 1024 * 4 bytes of audio data. Note that the implementation may use a larger buffer than requested if it needs to, but the implementation will set up a buffer of at least the requested size. Specifying a compressed or extension-supplied format may result in failure, even if the extension is supplied for rendering. LWJGL SPECIFIC: the actual created device is managed internally in lwjgl

Parameters

devicename:String

Name of device to open for capture

frequency:int

Frequency of samples to capture

format:int

Format of samples to capture

buffersize:int

Size of buffer to capture to

Returns:ALCdevice

ALCdevice if it was possible to open a device

When the application feels there are enough samples available to process, it can obtain them from the AL via the alcCaptureSamples entry point. The "buffer" argument specifies an application-allocated buffer that can contain at least "samples" sample frames. The implementation may defer conversion and resampling until this point. Requesting more sample frames than are currently available is an error.

Parameters

buffer:ByteBuffer

Buffer to store samples in

samples:int

Number of samples to request

Once a capture device has been opened via alcCaptureOpenDevice, it is made to start recording audio via the alcCaptureStart entry point: Once started, the device will record audio to an internal ring buffer, the size of which was specified when opening the device. The application may query the capture device to discover how much data is currently available via the alcGetInteger with the ALC_CAPTURE_SAMPLES token. This will report the number of sample frames currently available.

If the application doesn't need to capture more audio for an amount of time, they can halt the device without closing it via the alcCaptureStop entry point. The implementation is encouraged to optimize for this case. The amount of audio samples available after restarting a stopped capture device is reset to zero. The application does not need to stop the capture device to read from it.