BitmapToHardwareBufferProcessor

Kotlin |Java

@RequiresApi(value = 26)
@ExperimentalApi
public class BitmapToHardwareBufferProcessor implements AutoCloseable

A HardwareBufferFrameProcessor that converts Bitmap-backed HardwareBufferFrame instances into android.hardware.HardwareBuffer-backed ones.

This processor caches the underlying android.hardware.HardwareBuffer as long as the input Bitmap remains the same (verified via getGenerationId). It uses JNI to copy pixels from the bitmap to the hardware buffer.

The processor manages the lifecycle of the hardware buffer using reference counting, ensuring it is only closed once all consumer frames and the processor itself have released their references.

Summary

Public constructors
`BitmapToHardwareBufferProcessor( HardwareBufferJniWrapper hardwareBufferJniWrapper, ExecutorService internalExecutor, Executor errorExecutor, Consumer<VideoFrameProcessingException> errorCallback )` Creates an instance.

Public methods
`void`	`close()`
`HardwareBufferFrame`	`process(HardwareBufferFrame inputFrame)` Converts the `inputFrame` to a new `HardwareBufferFrame`.

Public constructors

BitmapToHardwareBufferProcessor

public BitmapToHardwareBufferProcessor(
    HardwareBufferJniWrapper hardwareBufferJniWrapper,
    ExecutorService internalExecutor,
    Executor errorExecutor,
    Consumer<VideoFrameProcessingException> errorCallback
)

Creates an instance.

Parameters
`HardwareBufferJniWrapper hardwareBufferJniWrapper`	The `HardwareBufferJniWrapper` that supplies the native helpers needed by this class.
`ExecutorService internalExecutor`	The `ExecutorService` that waits for the release fence to signal before closing created `HardwareBuffer`s. Will be `shutdown` when this class is `closed`.
`Executor errorExecutor`	The `Executor` on which the `errorCallback` will be called.
`Consumer<VideoFrameProcessingException> errorCallback`	The `Consumer` called when waiting or closing the created `HardwareBuffer`s fails.

Public methods

close

public void close()

process

public HardwareBufferFrame process(HardwareBufferFrame inputFrame)

Converts the inputFrame to a new HardwareBufferFrame.

The implementation may return the inputFrame itself if no conversion is needed, or a new frame backed by a android.hardware.HardwareBuffer.

Parameters
`HardwareBufferFrame inputFrame`	The input `HardwareBufferFrame`.

Returns
`HardwareBufferFrame`	The processed `HardwareBufferFrame`.