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/common/CameraProviderManager.cpp b/services/camera/libcameraservice/common/CameraProviderManager.cpp
index 0cce2ca..d37d717 100644
--- a/services/camera/libcameraservice/common/CameraProviderManager.cpp
+++ b/services/camera/libcameraservice/common/CameraProviderManager.cpp
@@ -20,7 +20,7 @@
#include "CameraProviderManager.h"
-#include <android/hardware/camera/device/3.7/ICameraDevice.h>
+#include <android/hardware/camera/device/3.8/ICameraDevice.h>
#include <algorithm>
#include <chrono>
@@ -307,6 +307,50 @@
return OK;
}
+status_t CameraProviderManager::getTorchStrengthLevel(const std::string &id,
+ int32_t* torchStrength /*out*/) {
+ std::lock_guard<std::mutex> lock(mInterfaceMutex);
+
+ auto deviceInfo = findDeviceInfoLocked(id);
+ if (deviceInfo == nullptr) return NAME_NOT_FOUND;
+
+ return deviceInfo->getTorchStrengthLevel(torchStrength);
+}
+
+status_t CameraProviderManager::turnOnTorchWithStrengthLevel(const std::string &id,
+ int32_t torchStrength) {
+ std::lock_guard<std::mutex> lock(mInterfaceMutex);
+
+ auto deviceInfo = findDeviceInfoLocked(id);
+ if (deviceInfo == nullptr) return NAME_NOT_FOUND;
+
+ return deviceInfo->turnOnTorchWithStrengthLevel(torchStrength);
+}
+
+bool CameraProviderManager::shouldSkipTorchStrengthUpdate(const std::string &id,
+ int32_t torchStrength) const {
+ std::lock_guard<std::mutex> lock(mInterfaceMutex);
+
+ auto deviceInfo = findDeviceInfoLocked(id);
+ if (deviceInfo == nullptr) return NAME_NOT_FOUND;
+
+ if (deviceInfo->mTorchStrengthLevel == torchStrength) {
+ ALOGV("%s: Skipping torch strength level updates prev_level: %d, new_level: %d",
+ __FUNCTION__, deviceInfo->mTorchStrengthLevel, torchStrength);
+ return true;
+ }
+ return false;
+}
+
+int32_t CameraProviderManager::getTorchDefaultStrengthLevel(const std::string &id) const {
+ std::lock_guard<std::mutex> lock(mInterfaceMutex);
+
+ auto deviceInfo = findDeviceInfoLocked(id);
+ if (deviceInfo == nullptr) return NAME_NOT_FOUND;
+
+ return deviceInfo->mTorchDefaultStrengthLevel;
+}
+
bool CameraProviderManager::supportSetTorchMode(const std::string &id) const {
std::lock_guard<std::mutex> lock(mInterfaceMutex);
for (auto& provider : mProviders) {
@@ -2385,6 +2429,22 @@
mHasFlashUnit = false;
}
+ camera_metadata_entry entry =
+ mCameraCharacteristics.find(ANDROID_FLASH_INFO_STRENGTH_DEFAULT_LEVEL);
+ if (entry.count == 1) {
+ mTorchDefaultStrengthLevel = entry.data.i32[0];
+ } else {
+ mTorchDefaultStrengthLevel = 0;
+ }
+
+ entry = mCameraCharacteristics.find(ANDROID_FLASH_INFO_STRENGTH_MAXIMUM_LEVEL);
+ if (entry.count == 1) {
+ mTorchMaximumStrengthLevel = entry.data.i32[0];
+ } else {
+ mTorchMaximumStrengthLevel = 0;
+ }
+
+ mTorchStrengthLevel = 0;
queryPhysicalCameraIds();
// Get physical camera characteristics if applicable
@@ -2468,6 +2528,80 @@
return setTorchModeForDevice<InterfaceT>(enabled);
}
+status_t CameraProviderManager::ProviderInfo::DeviceInfo3::turnOnTorchWithStrengthLevel(
+ int32_t torchStrength) {
+ const sp<CameraProviderManager::ProviderInfo::DeviceInfo3::InterfaceT> interface =
+ startDeviceInterface<CameraProviderManager::ProviderInfo::DeviceInfo3::InterfaceT>();
+ if (interface == nullptr) {
+ return DEAD_OBJECT;
+ }
+ sp<hardware::camera::device::V3_8::ICameraDevice> interface_3_8 = nullptr;
+ auto castResult_3_8 = device::V3_8::ICameraDevice::castFrom(interface);
+ if (castResult_3_8.isOk()) {
+ interface_3_8 = castResult_3_8;
+ }
+
+ if (interface_3_8 == nullptr) {
+ return INVALID_OPERATION;
+ }
+
+ Status s = interface_3_8->turnOnTorchWithStrengthLevel(torchStrength);
+ if (s == Status::OK) {
+ mTorchStrengthLevel = torchStrength;
+ }
+ return mapToStatusT(s);
+}
+
+status_t CameraProviderManager::ProviderInfo::DeviceInfo3::getTorchStrengthLevel(
+ int32_t *torchStrength) {
+ if (torchStrength == nullptr) {
+ return BAD_VALUE;
+ }
+ const sp<CameraProviderManager::ProviderInfo::DeviceInfo3::InterfaceT> interface =
+ startDeviceInterface<CameraProviderManager::ProviderInfo::DeviceInfo3::InterfaceT>();
+ if (interface == nullptr) {
+ return DEAD_OBJECT;
+ }
+ auto castResult_3_8 = device::V3_8::ICameraDevice::castFrom(interface);
+ sp<hardware::camera::device::V3_8::ICameraDevice> interface_3_8 = nullptr;
+ if (castResult_3_8.isOk()) {
+ interface_3_8 = castResult_3_8;
+ }
+
+ if (interface_3_8 == nullptr) {
+ return INVALID_OPERATION;
+ }
+
+ Status callStatus;
+ status_t res;
+ hardware::Return<void> ret = interface_3_8->getTorchStrengthLevel([&callStatus, &torchStrength]
+ (Status status, const int32_t& torchStrengthLevel) {
+ callStatus = status;
+ if (status == Status::OK) {
+ *torchStrength = torchStrengthLevel;
+ } });
+
+ if (ret.isOk()) {
+ switch (callStatus) {
+ case Status::OK:
+ // Expected case, do nothing.
+ res = OK;
+ break;
+ case Status::METHOD_NOT_SUPPORTED:
+ res = INVALID_OPERATION;
+ break;
+ default:
+ ALOGE("%s: Get torch strength level failed: %d", __FUNCTION__, callStatus);
+ res = UNKNOWN_ERROR;
+ }
+ } else {
+ ALOGE("%s: Unexpected binder error: %s", __FUNCTION__, ret.description().c_str());
+ res = UNKNOWN_ERROR;
+ }
+
+ return res;
+}
+
status_t CameraProviderManager::ProviderInfo::DeviceInfo3::getCameraInfo(
hardware::CameraInfo *info) const {
if (info == nullptr) return BAD_VALUE;
diff --git a/services/camera/libcameraservice/common/CameraProviderManager.h b/services/camera/libcameraservice/common/CameraProviderManager.h
index f28d128..7d13941 100644
--- a/services/camera/libcameraservice/common/CameraProviderManager.h
+++ b/services/camera/libcameraservice/common/CameraProviderManager.h
@@ -258,6 +258,17 @@
bool supportSetTorchMode(const std::string &id) const;
/**
+ * Check if torch strength update should be skipped or not.
+ */
+ bool shouldSkipTorchStrengthUpdate(const std::string &id, int32_t torchStrength) const;
+
+ /**
+ * Return the default torch strength level if the torch strength control
+ * feature is supported.
+ */
+ int32_t getTorchDefaultStrengthLevel(const std::string &id) const;
+
+ /**
* Turn on or off the flashlight on a given camera device.
* May fail if the device does not support this API, is in active use, or if the device
* doesn't exist, etc.
@@ -265,6 +276,24 @@
status_t setTorchMode(const std::string &id, bool enabled);
/**
+ * Change the brightness level of the flash unit associated with the cameraId and
+ * set it to the value in torchStrength.
+ * If the torch is OFF and torchStrength > 0, the torch will be turned ON with the
+ * specified strength level. If the torch is ON, only the brightness level will be
+ * changed.
+ *
+ * This operation will fail if the device does not have flash unit, has flash unit
+ * but does not support this API, torchStrength is invalid or if the device doesn't
+ * exist etc.
+ */
+ status_t turnOnTorchWithStrengthLevel(const std::string &id, int32_t torchStrength);
+
+ /**
+ * Return the torch strength level of this camera device.
+ */
+ status_t getTorchStrengthLevel(const std::string &id, int32_t* torchStrength);
+
+ /**
* Setup vendor tags for all registered providers
*/
status_t setUpVendorTags();
@@ -475,10 +504,17 @@
hardware::camera::common::V1_0::CameraDeviceStatus mStatus;
wp<ProviderInfo> mParentProvider;
+ // Torch strength default, maximum levels if the torch strength control
+ // feature is supported.
+ int32_t mTorchStrengthLevel;
+ int32_t mTorchMaximumStrengthLevel;
+ int32_t mTorchDefaultStrengthLevel;
bool hasFlashUnit() const { return mHasFlashUnit; }
bool supportNativeZoomRatio() const { return mSupportNativeZoomRatio; }
virtual status_t setTorchMode(bool enabled) = 0;
+ virtual status_t turnOnTorchWithStrengthLevel(int32_t torchStrength) = 0;
+ virtual status_t getTorchStrengthLevel(int32_t *torchStrength) = 0;
virtual status_t getCameraInfo(hardware::CameraInfo *info) const = 0;
virtual bool isAPI1Compatible() const = 0;
virtual status_t dumpState(int fd) = 0;
@@ -551,6 +587,9 @@
typedef hardware::camera::device::V3_2::ICameraDevice InterfaceT;
virtual status_t setTorchMode(bool enabled) override;
+ virtual status_t turnOnTorchWithStrengthLevel(int32_t torchStrength) override;
+ virtual status_t getTorchStrengthLevel(int32_t *torchStrength) override;
+
virtual status_t getCameraInfo(hardware::CameraInfo *info) const override;
virtual bool isAPI1Compatible() const override;
virtual status_t dumpState(int fd) override;