EncoderWriterHardwareBufferQueue
@RequiresApi(value = 33)
@ExperimentalApi
public class EncoderWriterHardwareBufferQueue implements HardwareBufferFrameQueue
An implementation of HardwareBufferFrameQueue that uses an ImageWriter to forward frames to a SurfaceInfo. Sets the USAGE_VIDEO_ENCODE flag on the buffers.
Summary
Public constructors |
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Creates an instance. |
Public methods |
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@Nullable HardwareBufferFrame |
dequeue(Attempts to dequeue a |
void |
queue(HardwareBufferFrame frame)Queues a |
void |
release()Releases all resources associated with this instance. |
void |
Signals that no more frames will be queued. |
Public constructors
EncoderWriterHardwareBufferQueue
public EncoderWriterHardwareBufferQueue(
PacketConsumerHardwareBufferFrameQueue.Listener listener
)
Creates an instance.
Public methods
dequeue
public @Nullable HardwareBufferFrame dequeue(
HardwareBufferFrameQueue.FrameFormat format,
Runnable wakeupListener
)
Attempts to dequeue a HardwareBufferFrame matching the specified format.
If the queue has reached its capacity and no buffers are available for reuse, this method returns null. In this case, the wakeupListener will be invoked when a buffer is eventually returned to the pool.
If this method is called multiple times without returning a frame, only the most recent wakeupListener is guaranteed to be invoked.
| Parameters | |
|---|---|
HardwareBufferFrameQueue.FrameFormat format |
The required format for the dequeued buffer. |
Runnable wakeupListener |
A callback to notify the caller when a buffer becomes available. |
| Returns | |
|---|---|
@Nullable HardwareBufferFrame |
A |
queue
public void queue(HardwareBufferFrame frame)
Queues a HardwareBufferFrame for consumption by the downstream component.
Implementations may override release of the queued frame.
The implementation is responsible for ensuring the buffer is correctly reused or released once the downstream component has finished processing it.
| Parameters | |
|---|---|
HardwareBufferFrame frame |
The frame to be processed. |
signalEndOfStream
public void signalEndOfStream()
Signals that no more frames will be queued.
This propagates an end-of-stream signal to the downstream consumer.