Camera: Add support for torch strength control.
This change consists of support to control flashunit brightness level
and getting the current brightness level for the flash unit associated
with camera device.
Test: Flashlight CTS
Bug: 200174275
Change-Id: I7f0b4c826e6ccef157ec22a3b3b8cf75a6b2152d
diff --git a/services/camera/libcameraservice/CameraService.cpp b/services/camera/libcameraservice/CameraService.cpp
index 569ab63..e65a27a 100644
--- a/services/camera/libcameraservice/CameraService.cpp
+++ b/services/camera/libcameraservice/CameraService.cpp
@@ -569,6 +569,15 @@
onTorchStatusChangedLocked(cameraId, newStatus, systemCameraKind);
}
+void CameraService::broadcastTorchStrengthLevel(const String8& cameraId,
+ int32_t newStrengthLevel) {
+ Mutex::Autolock lock(mStatusListenerLock);
+ for (auto& i : mListenerList) {
+ i->getListener()->onTorchStrengthLevelChanged(String16{cameraId},
+ newStrengthLevel);
+ }
+}
+
void CameraService::onTorchStatusChangedLocked(const String8& cameraId,
TorchModeStatus newStatus, SystemCameraKind systemCameraKind) {
ALOGI("%s: Torch status changed for cameraId=%s, newStatus=%d",
@@ -804,6 +813,31 @@
return ret;
}
+Status CameraService::getTorchStrengthLevel(const String16& cameraId,
+ int32_t* torchStrength) {
+ ATRACE_CALL();
+ Mutex::Autolock l(mServiceLock);
+ if (!mInitialized) {
+ ALOGE("%s: Camera HAL couldn't be initialized.", __FUNCTION__);
+ return STATUS_ERROR(ERROR_DISCONNECTED, "Camera HAL couldn't be initialized.");
+ }
+
+ if(torchStrength == NULL) {
+ ALOGE("%s: strength level must not be null.", __FUNCTION__);
+ return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT, "Strength level should not be null.");
+ }
+
+ status_t res = mCameraProviderManager->getTorchStrengthLevel(String8(cameraId).string(),
+ torchStrength);
+ if (res != OK) {
+ return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION, "Unable to retrieve torch "
+ "strength level for device %s: %s (%d)", String8(cameraId).string(),
+ strerror(-res), res);
+ }
+ ALOGI("%s: Torch strength level is: %d", __FUNCTION__, *torchStrength);
+ return Status::ok();
+}
+
String8 CameraService::getFormattedCurrentTime() {
time_t now = time(nullptr);
char formattedTime[64];
@@ -2004,6 +2038,132 @@
return OK;
}
+Status CameraService::turnOnTorchWithStrengthLevel(const String16& cameraId, int32_t torchStrength,
+ const sp<IBinder>& clientBinder) {
+ Mutex::Autolock lock(mServiceLock);
+
+ ATRACE_CALL();
+ if (clientBinder == nullptr) {
+ ALOGE("%s: torch client binder is NULL", __FUNCTION__);
+ return STATUS_ERROR(ERROR_ILLEGAL_ARGUMENT,
+ "Torch client binder in null.");
+ }
+
+ String8 id = String8(cameraId.string());
+ int uid = CameraThreadState::getCallingUid();
+
+ if (shouldRejectSystemCameraConnection(id)) {
+ return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT, "Unable to change the strength level"
+ "for system only device %s: ", id.string());
+ }
+
+ // verify id is valid
+ auto state = getCameraState(id);
+ if (state == nullptr) {
+ ALOGE("%s: camera id is invalid %s", __FUNCTION__, id.string());
+ return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT,
+ "Camera ID \"%s\" is a not valid camera ID", id.string());
+ }
+
+ StatusInternal cameraStatus = state->getStatus();
+ if (cameraStatus != StatusInternal::NOT_AVAILABLE &&
+ cameraStatus != StatusInternal::PRESENT) {
+ ALOGE("%s: camera id is invalid %s, status %d", __FUNCTION__, id.string(),
+ (int)cameraStatus);
+ return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT,
+ "Camera ID \"%s\" is a not valid camera ID", id.string());
+ }
+
+ {
+ Mutex::Autolock al(mTorchStatusMutex);
+ TorchModeStatus status;
+ status_t err = getTorchStatusLocked(id, &status);
+ if (err != OK) {
+ if (err == NAME_NOT_FOUND) {
+ return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT,
+ "Camera \"%s\" does not have a flash unit", id.string());
+ }
+ ALOGE("%s: getting current torch status failed for camera %s",
+ __FUNCTION__, id.string());
+ return STATUS_ERROR_FMT(ERROR_INVALID_OPERATION,
+ "Error changing torch strength level for camera \"%s\": %s (%d)",
+ id.string(), strerror(-err), err);
+ }
+
+ if (status == TorchModeStatus::NOT_AVAILABLE) {
+ if (cameraStatus == StatusInternal::NOT_AVAILABLE) {
+ ALOGE("%s: torch mode of camera %s is not available because "
+ "camera is in use.", __FUNCTION__, id.string());
+ return STATUS_ERROR_FMT(ERROR_CAMERA_IN_USE,
+ "Torch for camera \"%s\" is not available due to an existing camera user",
+ id.string());
+ } else {
+ ALOGE("%s: torch mode of camera %s is not available due to "
+ "insufficient resources", __FUNCTION__, id.string());
+ return STATUS_ERROR_FMT(ERROR_MAX_CAMERAS_IN_USE,
+ "Torch for camera \"%s\" is not available due to insufficient resources",
+ id.string());
+ }
+ }
+ }
+
+ {
+ Mutex::Autolock al(mTorchUidMapMutex);
+ updateTorchUidMapLocked(cameraId, uid);
+ }
+ // Check if the current torch strength level is same as the new one.
+ bool shouldSkipTorchStrengthUpdates = mCameraProviderManager->shouldSkipTorchStrengthUpdate(
+ id.string(), torchStrength);
+
+ status_t err = mFlashlight->turnOnTorchWithStrengthLevel(id, torchStrength);
+
+ if (err != OK) {
+ int32_t errorCode;
+ String8 msg;
+ switch (err) {
+ case -ENOSYS:
+ msg = String8::format("Camera \"%s\" has no flashlight.",
+ id.string());
+ errorCode = ERROR_ILLEGAL_ARGUMENT;
+ break;
+ case -EBUSY:
+ msg = String8::format("Camera \"%s\" is in use",
+ id.string());
+ errorCode = ERROR_CAMERA_IN_USE;
+ break;
+ default:
+ msg = String8::format("Changing torch strength level failed.");
+ errorCode = ERROR_INVALID_OPERATION;
+
+ }
+ ALOGE("%s: %s", __FUNCTION__, msg.string());
+ return STATUS_ERROR(errorCode, msg.string());
+ }
+
+ {
+ // update the link to client's death
+ // Store the last client that turns on each camera's torch mode.
+ Mutex::Autolock al(mTorchClientMapMutex);
+ ssize_t index = mTorchClientMap.indexOfKey(id);
+ if (index == NAME_NOT_FOUND) {
+ mTorchClientMap.add(id, clientBinder);
+ } else {
+ mTorchClientMap.valueAt(index)->unlinkToDeath(this);
+ mTorchClientMap.replaceValueAt(index, clientBinder);
+ }
+ clientBinder->linkToDeath(this);
+ }
+
+ int clientPid = CameraThreadState::getCallingPid();
+ const char *id_cstr = id.c_str();
+ ALOGI("%s: Torch strength for camera id %s changed to %d for client PID %d",
+ __FUNCTION__, id_cstr, torchStrength, clientPid);
+ if (!shouldSkipTorchStrengthUpdates) {
+ broadcastTorchStrengthLevel(id, torchStrength);
+ }
+ return Status::ok();
+}
+
Status CameraService::setTorchMode(const String16& cameraId, bool enabled,
const sp<IBinder>& clientBinder) {
Mutex::Autolock lock(mServiceLock);
@@ -2075,13 +2235,7 @@
// Update UID map - this is used in the torch status changed callbacks, so must be done
// before setTorchMode
Mutex::Autolock al(mTorchUidMapMutex);
- if (mTorchUidMap.find(id) == mTorchUidMap.end()) {
- mTorchUidMap[id].first = uid;
- mTorchUidMap[id].second = uid;
- } else {
- // Set the pending UID
- mTorchUidMap[id].first = uid;
- }
+ updateTorchUidMapLocked(cameraId, uid);
}
status_t err = mFlashlight->setTorchMode(id, enabled);
@@ -2136,6 +2290,17 @@
return Status::ok();
}
+void CameraService::updateTorchUidMapLocked(const String16& cameraId, int uid) {
+ String8 id = String8(cameraId.string());
+ if (mTorchUidMap.find(id) == mTorchUidMap.end()) {
+ mTorchUidMap[id].first = uid;
+ mTorchUidMap[id].second = uid;
+ } else {
+ // Set the pending UID
+ mTorchUidMap[id].first = uid;
+ }
+}
+
Status CameraService::notifySystemEvent(int32_t eventId,
const std::vector<int32_t>& args) {
const int pid = CameraThreadState::getCallingPid();