Add multi-client support in camera2
Add support for multiple clients to access the same camera using
camera2 api. This is initial set of changes and includes all the new
API changes as well as implementation of opening the camera in shared
mode, new open callbacks, newly added characteristics and creating
shared sesion.
After the merge of these initial changes, it will be followed by
another set of changes which will include implementation of
startStreaming and stopStreaming APIs and the capability for multiple
clients to stream the camera images.
Flag: com.android.internal.camera.flags.camera_multi_client
Bug:265196098
API-Coverage-Bug: 377371012
Test: Tested that a java and native client are able to open the camera
at the same time and get the required callbacks and they are able to get
the shared session configuration using newly added characteristics.
Tested the clientaccessprioritieschanged callback occur appropriately
when new client connects/disconnects.
Change-Id: I4cd3babf538b065d635c99c695718d8f52883afc
diff --git a/camera/ndk/impl/ACameraDevice.h b/camera/ndk/impl/ACameraDevice.h
index 2b9f327..d3aed4b 100644
--- a/camera/ndk/impl/ACameraDevice.h
+++ b/camera/ndk/impl/ACameraDevice.h
@@ -63,7 +63,7 @@
public:
CameraDevice(const char* id, ACameraDevice_StateCallbacks* cb,
sp<ACameraMetadata> chars,
- ACameraDevice* wrapper);
+ ACameraDevice* wrapper, bool sharedMode);
~CameraDevice();
inline const char* getId() const { return mCameraId.c_str(); }
@@ -98,6 +98,7 @@
binder::Status onRequestQueueEmpty() override;
binder::Status onRepeatingRequestError(int64_t lastFrameNumber,
int32_t stoppedSequenceId) override;
+ binder::Status onClientSharedAccessPriorityChanged(bool isPrimaryClient) override;
private:
const wp<CameraDevice> mDevice;
};
@@ -113,6 +114,9 @@
// Stop the looper thread and unregister the handler
void stopLooperAndDisconnect();
+ void setPrimaryClient(bool isPrimary) {mIsPrimaryClient = isPrimary;};
+ bool isPrimaryClient() {return mIsPrimaryClient;};
+
private:
friend ACameraCaptureSession;
camera_status_t checkCameraClosedOrErrorLocked() const;
@@ -186,6 +190,8 @@
const sp<ACameraMetadata> mChars; // Camera characteristics
const sp<ServiceCallback> mServiceCallback;
ACameraDevice* mWrapper;
+ bool mSharedMode;
+ bool mIsPrimaryClient;
// stream id -> pair of (ANW* from application, OutputConfiguration used for camera service)
std::map<int, std::pair<ANativeWindow*, OutputConfiguration>> mConfiguredOutputs;
@@ -227,7 +233,8 @@
kWhatCaptureBufferLost, // onCaptureBufferLost
kWhatPreparedCb, // onWindowPrepared
// Internal cleanup
- kWhatCleanUpSessions // Cleanup cached sp<ACameraCaptureSession>
+ kWhatCleanUpSessions, // Cleanup cached sp<ACameraCaptureSession>
+ kWhatClientSharedAccessPriorityChanged
};
static const char* kContextKey;
static const char* kDeviceKey;
@@ -403,8 +410,8 @@
*/
struct ACameraDevice {
ACameraDevice(const char* id, ACameraDevice_StateCallbacks* cb,
- sp<ACameraMetadata> chars) :
- mDevice(new android::acam::CameraDevice(id, cb, chars, this)) {}
+ sp<ACameraMetadata> chars, bool sharedMode) :
+ mDevice(new android::acam::CameraDevice(id, cb, chars, this, sharedMode)) {}
~ACameraDevice();
@@ -445,6 +452,14 @@
mDevice->setRemoteDevice(remote);
}
+ inline void setPrimaryClient(bool isPrimary) {
+ mDevice->setPrimaryClient(isPrimary);
+ }
+
+ inline bool isPrimaryClient() {
+ return mDevice->isPrimaryClient();
+ }
+
private:
android::sp<android::acam::CameraDevice> mDevice;
};