public class LegacyCameraDevice extends Object implements AutoCloseable
There are two main components that are used to implement this:
- A state machine containing valid Camera2 device states (CameraDeviceState
).
- A message-queue based pipeline that manages an old Camera class, and executes capture and
configuration requests.
Modifier and Type | Field and Description |
---|---|
static int |
MAX_DIMEN_FOR_ROUNDING |
static int |
NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW |
Constructor and Description |
---|
LegacyCameraDevice(int cameraId,
Camera camera,
CameraCharacteristics characteristics,
ICameraDeviceCallbacks callbacks)
Create a new emulated camera device from a given Camera 1 API camera.
|
Modifier and Type | Method and Description |
---|---|
long |
cancelRequest(int requestId)
Cancel the repeating request with the given request id.
|
void |
close()
Closes this resource, relinquishing any underlying resources.
|
int |
configureOutputs(SparseArray<Surface> outputs)
Configure the device with a set of output surfaces.
|
static int |
detectSurfaceDataspace(Surface surface)
Query the surface for its currently configured dataspace
|
static int |
detectSurfaceType(Surface surface)
Query the surface for its currently configured format
|
protected void |
finalize()
Called by the garbage collector on an object when garbage collection
determines that there are no more references to the object.
|
long |
flush()
Flush any pending requests.
|
static Size |
getSurfaceSize(Surface surface)
Query the surface for its currently configured default buffer size.
|
boolean |
isClosed()
Return
true if the device has been closed. |
static boolean |
isFlexibleConsumer(Surface output) |
static boolean |
isPreviewConsumer(Surface output) |
static boolean |
isVideoEncoderConsumer(Surface output) |
SubmitInfo |
submitRequest(CaptureRequest request,
boolean repeating)
Submit a single capture request.
|
SubmitInfo |
submitRequestList(CaptureRequest[] requestList,
boolean repeating)
Submit a burst of capture requests.
|
void |
waitUntilIdle()
Block until the
ICameraDeviceCallbacks#onCameraIdle() callback is received. |
public static final int MAX_DIMEN_FOR_ROUNDING
public static final int NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW
public LegacyCameraDevice(int cameraId, Camera camera, CameraCharacteristics characteristics, ICameraDeviceCallbacks callbacks)
The Camera
provided to this constructor must already have been successfully opened,
and ownership of the provided camera is passed to this object. No further calls to the
camera methods should be made following this constructor.
cameraId
- the id of the camera.camera
- an open Camera
device.characteristics
- the static camera characteristics for this camera devicecallbacks
- ICameraDeviceCallbacks
callbacks to call for Camera2 API operations.public int configureOutputs(SparseArray<Surface> outputs)
Using empty or null
outputs
is the same as unconfiguring.
Every surface in outputs
must be non-null
.
outputs
- a list of surfaces to set. LegacyCameraDevice will take ownership of this
list; it must not be modified by the caller once it's passed in.NO_ERROR
on success.public SubmitInfo submitRequestList(CaptureRequest[] requestList, boolean repeating)
requestList
- a list of capture requests to execute.repeating
- true
if this burst is repeating.public SubmitInfo submitRequest(CaptureRequest request, boolean repeating)
request
- the capture request to execute.repeating
- true
if this request is repeating.public long cancelRequest(int requestId)
requestId
- the request id of the request to cancel.INVALID_FRAME
if none exists.public void waitUntilIdle()
ICameraDeviceCallbacks#onCameraIdle()
callback is received.public long flush()
public boolean isClosed()
true
if the device has been closed.public void close()
AutoCloseable
try
-with-resources statement.
While this interface method is declared to throw Exception
, implementers are strongly encouraged to
declare concrete implementations of the close
method to
throw more specific exceptions, or to throw no exception at all
if the close operation cannot fail.
Implementers of this interface are also strongly advised
to not have the close
method throw InterruptedException
.
This exception interacts with a thread's interrupted status,
and runtime misbehavior is likely to occur if an InterruptedException
is suppressed.
More generally, if it would cause problems for an
exception to be suppressed, the AutoCloseable.close
method should not throw it.
Note that unlike the close
method of Closeable
, this close
method
is not required to be idempotent. In other words,
calling this close
method more than once may have some
visible side effect, unlike Closeable.close
which is
required to have no effect if called more than once.
However, implementers of this interface are strongly encouraged
to make their close
methods idempotent.
close
in interface AutoCloseable
protected void finalize() throws Throwable
Object
finalize
method to dispose of
system resources or to perform other cleanup.
The general contract of finalize
is that it is invoked
if and when the JavaTM virtual
machine has determined that there is no longer any
means by which this object can be accessed by any thread that has
not yet died, except as a result of an action taken by the
finalization of some other object or class which is ready to be
finalized. The finalize
method may take any action, including
making this object available again to other threads; the usual purpose
of finalize
, however, is to perform cleanup actions before
the object is irrevocably discarded. For example, the finalize method
for an object that represents an input/output connection might perform
explicit I/O transactions to break the connection before the object is
permanently discarded.
The finalize
method of class Object
performs no
special action; it simply returns normally. Subclasses of
Object
may override this definition.
The Java programming language does not guarantee which thread will
invoke the finalize
method for any given object. It is
guaranteed, however, that the thread that invokes finalize will not
be holding any user-visible synchronization locks when finalize is
invoked. If an uncaught exception is thrown by the finalize method,
the exception is ignored and finalization of that object terminates.
After the finalize
method has been invoked for an object, no
further action is taken until the Java virtual machine has again
determined that there is no longer any means by which this object can
be accessed by any thread that has not yet died, including possible
actions by other objects or classes which are ready to be finalized,
at which point the object may be discarded.
The finalize
method is never invoked more than once by a Java
virtual machine for any given object.
Any exception thrown by the finalize
method causes
the finalization of this object to be halted, but is otherwise
ignored.
public static Size getSurfaceSize(Surface surface) throws LegacyExceptionUtils.BufferQueueAbandonedException
surface
- a non-null
Surface
NullPointerException
- if the surface
was null
LegacyExceptionUtils.BufferQueueAbandonedException
- if the surface
was invalidpublic static boolean isFlexibleConsumer(Surface output)
public static boolean isPreviewConsumer(Surface output)
public static boolean isVideoEncoderConsumer(Surface output)
public static int detectSurfaceType(Surface surface) throws LegacyExceptionUtils.BufferQueueAbandonedException
public static int detectSurfaceDataspace(Surface surface) throws LegacyExceptionUtils.BufferQueueAbandonedException