camera: implement flashlight control
Implement flashlight API for module v2.4 by calling module APIs and
by for hal v2 and v3 by using CameraDeviceBase.
Bug: 2682206
Change-Id: Ib8b77f6fd462489d672f27e14fe37801d35b7544
diff --git a/services/camera/libcameraservice/CameraFlashlight.cpp b/services/camera/libcameraservice/CameraFlashlight.cpp
new file mode 100644
index 0000000..00a70eb
--- /dev/null
+++ b/services/camera/libcameraservice/CameraFlashlight.cpp
@@ -0,0 +1,520 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "CameraFlashlight"
+#define ATRACE_TAG ATRACE_TAG_CAMERA
+#define LOG_NDEBUG 0
+
+#include <utils/Log.h>
+#include <utils/Trace.h>
+#include <cutils/properties.h>
+
+#include "camera/CameraMetadata.h"
+#include "CameraFlashlight.h"
+#include "gui/IGraphicBufferConsumer.h"
+#include "gui/BufferQueue.h"
+#include "camera/camera2/CaptureRequest.h"
+#include "CameraDeviceFactory.h"
+
+
+namespace android {
+
+CameraFlashlight::CameraFlashlight(CameraModule& cameraModule,
+ const camera_module_callbacks_t& callbacks) :
+ mCameraModule(&cameraModule),
+ mCallbacks(&callbacks) {
+}
+
+CameraFlashlight::~CameraFlashlight() {
+}
+
+status_t CameraFlashlight::createFlashlightControl(const String16& cameraId) {
+ ALOGV("%s: creating a flash light control for camera %s", __FUNCTION__,
+ cameraId.string());
+ if (mFlashControl != NULL) {
+ return INVALID_OPERATION;
+ }
+
+ status_t res = OK;
+
+ if (mCameraModule->getRawModule()->module_api_version >=
+ CAMERA_MODULE_API_VERSION_2_4) {
+ mFlashControl = new FlashControl(*mCameraModule, *mCallbacks);
+ if (mFlashControl == NULL) {
+ ALOGV("%s: cannot create flash control for module api v2.4+",
+ __FUNCTION__);
+ return NO_MEMORY;
+ }
+ } else {
+ uint32_t deviceVersion = CAMERA_DEVICE_API_VERSION_1_0;
+
+ if (mCameraModule->getRawModule()->module_api_version >=
+ CAMERA_MODULE_API_VERSION_2_0) {
+ camera_info info;
+ res = mCameraModule->getCameraInfo(
+ atoi(String8(cameraId).string()), &info);
+ if (res) {
+ ALOGV("%s: failed to get camera info for camera %s",
+ __FUNCTION__, cameraId.string());
+ return res;
+ }
+ deviceVersion = info.device_version;
+ }
+
+ if (deviceVersion >= CAMERA_DEVICE_API_VERSION_2_0) {
+ CameraDeviceClientFlashControl *flashControl =
+ new CameraDeviceClientFlashControl(*mCameraModule,
+ *mCallbacks);
+ if (!flashControl) {
+ return NO_MEMORY;
+ }
+
+ mFlashControl = flashControl;
+ }
+ else {
+ // todo: implement for device api 1
+ return INVALID_OPERATION;
+ }
+ }
+
+ return OK;
+}
+
+status_t CameraFlashlight::setTorchMode(const String16& cameraId, bool enabled) {
+ if (!mCameraModule) {
+ return NO_INIT;
+ }
+
+ ALOGV("%s: set torch mode of camera %s to %d", __FUNCTION__,
+ cameraId.string(), enabled);
+
+ status_t res = OK;
+ Mutex::Autolock l(mLock);
+
+ if (mFlashControl == NULL) {
+ res = createFlashlightControl(cameraId);
+ if (res) {
+ return res;
+ }
+ res = mFlashControl->setTorchMode(cameraId, enabled);
+ return res;
+ }
+
+ // if flash control already exists, turning on torch mode may fail if it's
+ // tied to another camera device for module v2.3 and below.
+ res = mFlashControl->setTorchMode(cameraId, enabled);
+ if (res == BAD_INDEX) {
+ // flash control is tied to another camera device, need to close it and
+ // try again.
+ mFlashControl.clear();
+ res = createFlashlightControl(cameraId);
+ if (res) {
+ return res;
+ }
+ res = mFlashControl->setTorchMode(cameraId, enabled);
+ }
+
+ return res;
+}
+
+bool CameraFlashlight::hasFlashUnit(const String16& cameraId) {
+ status_t res;
+
+ Mutex::Autolock l(mLock);
+
+ if (mFlashControl == NULL) {
+ res = createFlashlightControl(cameraId);
+ if (res) {
+ ALOGE("%s: failed to create flash control for %s ",
+ __FUNCTION__, cameraId.string());
+ return false;
+ }
+ }
+
+ bool flashUnit = false;
+
+ // if flash control already exists, querying if a camera device has a flash
+ // unit may fail if it's module v1
+ res = mFlashControl->hasFlashUnit(cameraId, &flashUnit);
+ if (res == BAD_INDEX) {
+ // need to close the flash control before query.
+ mFlashControl.clear();
+ res = createFlashlightControl(cameraId);
+ if (res) {
+ ALOGE("%s: failed to create flash control for %s ", __FUNCTION__,
+ cameraId.string());
+ return false;
+ }
+ res = mFlashControl->hasFlashUnit(cameraId, &flashUnit);
+ if (res) {
+ flashUnit = false;
+ }
+ }
+
+ return flashUnit;
+}
+
+status_t CameraFlashlight::prepareDeviceOpen() {
+ ALOGV("%s: prepare for device open", __FUNCTION__);
+
+ Mutex::Autolock l(mLock);
+
+ if (mCameraModule && mCameraModule->getRawModule()->module_api_version <
+ CAMERA_MODULE_API_VERSION_2_4) {
+ // framework is going to open a camera device, all flash light control
+ // should be closed for backward compatible support.
+ if (mFlashControl != NULL) {
+ mFlashControl.clear();
+ }
+ }
+
+ return OK;
+}
+
+
+FlashControlBase::~FlashControlBase() {
+}
+
+
+FlashControl::FlashControl(CameraModule& cameraModule,
+ const camera_module_callbacks_t& callbacks) :
+ mCameraModule(&cameraModule) {
+}
+
+FlashControl::~FlashControl() {
+}
+
+status_t FlashControl::hasFlashUnit(const String16& cameraId, bool *hasFlash) {
+ if (!hasFlash) {
+ return BAD_VALUE;
+ }
+
+ *hasFlash = false;
+
+ Mutex::Autolock l(mLock);
+
+ if (!mCameraModule) {
+ return NO_INIT;
+ }
+
+ camera_info info;
+ status_t res = mCameraModule->getCameraInfo(atoi(String8(cameraId).string()),
+ &info);
+ if (res != 0) {
+ return res;
+ }
+
+ CameraMetadata metadata;
+ metadata = info.static_camera_characteristics;
+ camera_metadata_entry flashAvailable =
+ metadata.find(ANDROID_FLASH_INFO_AVAILABLE);
+ if (flashAvailable.count == 1 && flashAvailable.data.u8[0] == 1) {
+ *hasFlash = true;
+ }
+
+ return OK;
+}
+
+status_t FlashControl::setTorchMode(const String16& cameraId, bool enabled) {
+ ALOGV("%s: set camera %s torch mode to %d", __FUNCTION__,
+ cameraId.string(), enabled);
+
+ Mutex::Autolock l(mLock);
+ if (!mCameraModule) {
+ return NO_INIT;
+ }
+
+ return mCameraModule->setTorchMode(String8(cameraId).string(), enabled);
+}
+
+CameraDeviceClientFlashControl::CameraDeviceClientFlashControl(
+ CameraModule& cameraModule,
+ const camera_module_callbacks_t& callbacks) :
+ mCameraModule(&cameraModule),
+ mCallbacks(&callbacks),
+ mTorchEnabled(false),
+ mMetadata(NULL) {
+}
+
+CameraDeviceClientFlashControl::~CameraDeviceClientFlashControl() {
+ if (mDevice != NULL) {
+ mDevice->flush();
+ mDevice->deleteStream(mStreamId);
+ mDevice.clear();
+ }
+ if (mMetadata) {
+ delete mMetadata;
+ }
+
+ mAnw.clear();
+ mSurfaceTexture.clear();
+ mProducer.clear();
+ mConsumer.clear();
+
+ if (mTorchEnabled) {
+ if (mCallbacks) {
+ ALOGV("%s: notify the framework that torch was turned off",
+ __FUNCTION__);
+ mCallbacks->torch_mode_status_change(mCallbacks,
+ String8(mCameraId).string(), TORCH_MODE_STATUS_OFF);
+ }
+ }
+}
+
+status_t CameraDeviceClientFlashControl::initializeSurface(int32_t width,
+ int32_t height) {
+ status_t res;
+ BufferQueue::createBufferQueue(&mProducer, &mConsumer);
+
+ mSurfaceTexture = new GLConsumer(mConsumer, 0, GLConsumer::TEXTURE_EXTERNAL,
+ true, true);
+ if (mSurfaceTexture == NULL) {
+ return NO_MEMORY;
+ }
+
+ int32_t format = HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED;
+ res = mSurfaceTexture->setDefaultBufferSize(width, height);
+ if (res) {
+ return res;
+ }
+ res = mSurfaceTexture->setDefaultBufferFormat(format);
+ if (res) {
+ return res;
+ }
+
+ bool useAsync = false;
+ int32_t consumerUsage;
+ res = mProducer->query(NATIVE_WINDOW_CONSUMER_USAGE_BITS, &consumerUsage);
+ if (res) {
+ return res;
+ }
+
+ if (consumerUsage & GraphicBuffer::USAGE_HW_TEXTURE) {
+ useAsync = true;
+ }
+
+ mAnw = new Surface(mProducer, useAsync);
+ if (mAnw == NULL) {
+ return NO_MEMORY;
+ }
+ res = mDevice->createStream(mAnw, width, height, format, &mStreamId);
+ if (res) {
+ return res;
+ }
+
+ res = mDevice->configureStreams();
+ if (res) {
+ return res;
+ }
+
+ return res;
+}
+
+status_t CameraDeviceClientFlashControl::getSmallestSurfaceSize(
+ const camera_info& info, int32_t *width, int32_t *height) {
+ if (!width || !height) {
+ return BAD_VALUE;
+ }
+
+ int32_t w = INT32_MAX;
+ int32_t h = 1;
+
+ CameraMetadata metadata;
+ metadata = info.static_camera_characteristics;
+ camera_metadata_entry streamConfigs =
+ metadata.find(ANDROID_SCALER_AVAILABLE_STREAM_CONFIGURATIONS);
+ for (size_t i = 0; i < streamConfigs.count; i += 4) {
+ int32_t fmt = streamConfigs.data.i32[i];
+ if (fmt == ANDROID_SCALER_AVAILABLE_FORMATS_IMPLEMENTATION_DEFINED) {
+ int32_t ww = streamConfigs.data.i32[i + 1];
+ int32_t hh = streamConfigs.data.i32[i + 2];
+
+ if (w* h > ww * hh) {
+ w = ww;
+ h = hh;
+ }
+ }
+ }
+
+ if (w == INT32_MAX) {
+ return NAME_NOT_FOUND;
+ }
+
+ *width = w;
+ *height = h;
+
+ return OK;
+}
+
+status_t CameraDeviceClientFlashControl::connectCameraDevice(
+ const String16& cameraId) {
+ String8 id = String8(cameraId);
+ camera_info info;
+ status_t res = mCameraModule->getCameraInfo(atoi(id.string()), &info);
+ if (res != 0) {
+ ALOGE("%s: failed to get camera info for camera %s", __FUNCTION__,
+ mCameraId.string());
+ return res;
+ }
+
+ mDevice = CameraDeviceFactory::createDevice(atoi(id.string()));
+ if (mDevice == NULL) {
+ return NO_MEMORY;
+ }
+
+ res = mDevice->initialize(mCameraModule);
+ if (res) {
+ goto fail;
+ }
+
+ int32_t width, height;
+ res = getSmallestSurfaceSize(info, &width, &height);
+ if (res) {
+ return res;
+ }
+ res = initializeSurface(width, height);
+ if (res) {
+ goto fail;
+ }
+
+ mCameraId = cameraId;
+
+ return OK;
+
+fail:
+ mDevice.clear();
+ return res;
+}
+
+
+status_t CameraDeviceClientFlashControl::hasFlashUnit(const String16& cameraId,
+ bool *hasFlash) {
+ ALOGV("%s: checking if camera %s has a flash unit", __FUNCTION__,
+ cameraId.string());
+
+ Mutex::Autolock l(mLock);
+ return hasFlashUnitLocked(cameraId, hasFlash);
+
+}
+
+status_t CameraDeviceClientFlashControl::hasFlashUnitLocked(
+ const String16& cameraId, bool *hasFlash) {
+ if (!mCameraModule) {
+ ALOGE("%s: camera module is NULL", __FUNCTION__);
+ return NO_INIT;
+ }
+
+ if (!hasFlash) {
+ return BAD_VALUE;
+ }
+
+ camera_info info;
+ status_t res = mCameraModule->getCameraInfo(
+ atoi(String8(cameraId).string()), &info);
+ if (res != 0) {
+ ALOGE("%s: failed to get camera info for camera %s", __FUNCTION__,
+ cameraId.string());
+ return res;
+ }
+
+ CameraMetadata metadata;
+ metadata = info.static_camera_characteristics;
+ camera_metadata_entry flashAvailable =
+ metadata.find(ANDROID_FLASH_INFO_AVAILABLE);
+ if (flashAvailable.count == 1 && flashAvailable.data.u8[0] == 1) {
+ *hasFlash = true;
+ }
+
+ return OK;
+}
+
+status_t CameraDeviceClientFlashControl::submitTorchRequest(bool enabled) {
+ status_t res;
+
+ if (mMetadata == NULL) {
+ mMetadata = new CameraMetadata();
+ if (mMetadata == NULL) {
+ return NO_MEMORY;
+ }
+ res = mDevice->createDefaultRequest(
+ CAMERA3_TEMPLATE_PREVIEW, mMetadata);
+ if (res) {
+ return res;
+ }
+ }
+
+ uint8_t torchOn = enabled ? ANDROID_FLASH_MODE_TORCH :
+ ANDROID_FLASH_MODE_OFF;
+
+ mMetadata->update(ANDROID_FLASH_MODE, &torchOn, 1);
+ mMetadata->update(ANDROID_REQUEST_OUTPUT_STREAMS, &mStreamId, 1);
+
+ int32_t requestId = 0;
+ mMetadata->update(ANDROID_REQUEST_ID, &requestId, 1);
+
+ List<const CameraMetadata> metadataRequestList;
+ metadataRequestList.push_back(*mMetadata);
+
+ int64_t lastFrameNumber = 0;
+ res = mDevice->captureList(metadataRequestList, &lastFrameNumber);
+
+ return res;
+}
+
+
+status_t CameraDeviceClientFlashControl::setTorchMode(
+ const String16& cameraId, bool enabled) {
+ bool hasFlash = false;
+
+ Mutex::Autolock l(mLock);
+ status_t res = hasFlashUnitLocked(cameraId, &hasFlash);
+
+ // pre-check
+ if (enabled) {
+ // invalid camera?
+ if (res) {
+ return -EINVAL;
+ }
+ // no flash unit?
+ if (!hasFlash) {
+ return -ENOSYS;
+ }
+ // already opened for a different device?
+ if (mDevice != NULL && cameraId != mCameraId) {
+ return BAD_INDEX;
+ }
+ } else if (mDevice == NULL || cameraId != mCameraId) {
+ // disabling the torch mode of an un-opened or different device.
+ return OK;
+ }
+
+ if (mDevice == NULL) {
+ res = connectCameraDevice(cameraId);
+ if (res) {
+ return res;
+ }
+ }
+
+ res = submitTorchRequest(enabled);
+ if (res) {
+ return res;
+ }
+
+ mTorchEnabled = enabled;
+ return OK;
+}
+
+}