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277 lines
8.4 KiB
277 lines
8.4 KiB
/*
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**
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** Copyright (C) 2013, The Android Open Source Project
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**
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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**
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** http://www.apache.org/licenses/LICENSE-2.0
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**
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*/
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//#define LOG_NDEBUG 0
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#define LOG_TAG "CameraBase"
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#include <utils/Log.h>
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#include <utils/threads.h>
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#include <utils/Mutex.h>
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#include <cutils/properties.h>
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#include <android/hardware/ICameraService.h>
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#include <binder/IPCThreadState.h>
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#include <binder/IServiceManager.h>
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#include <binder/IMemory.h>
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#include <camera/CameraBase.h>
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#include <camera/CameraUtils.h>
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// needed to instantiate
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#include <camera/Camera.h>
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#include <system/camera_metadata.h>
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namespace android {
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namespace hardware {
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status_t CameraInfo::writeToParcel(android::Parcel* parcel) const {
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status_t res;
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res = parcel->writeInt32(facing);
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if (res != OK) return res;
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res = parcel->writeInt32(orientation);
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return res;
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}
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status_t CameraInfo::readFromParcel(const android::Parcel* parcel) {
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status_t res;
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res = parcel->readInt32(&facing);
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if (res != OK) return res;
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res = parcel->readInt32(&orientation);
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return res;
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}
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status_t CameraStatus::writeToParcel(android::Parcel* parcel) const {
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auto res = parcel->writeString16(String16(cameraId));
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if (res != OK) return res;
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res = parcel->writeInt32(status);
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if (res != OK) return res;
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std::vector<String16> unavailablePhysicalIds16;
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for (auto& id8 : unavailablePhysicalIds) {
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unavailablePhysicalIds16.push_back(String16(id8));
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}
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res = parcel->writeString16Vector(unavailablePhysicalIds16);
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return res;
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}
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status_t CameraStatus::readFromParcel(const android::Parcel* parcel) {
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String16 tempCameraId;
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auto res = parcel->readString16(&tempCameraId);
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if (res != OK) return res;
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cameraId = String8(tempCameraId);
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res = parcel->readInt32(&status);
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if (res != OK) return res;
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std::vector<String16> unavailablePhysicalIds16;
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res = parcel->readString16Vector(&unavailablePhysicalIds16);
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if (res != OK) return res;
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for (auto& id16 : unavailablePhysicalIds16) {
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unavailablePhysicalIds.push_back(String8(id16));
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}
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return res;
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}
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} // namespace hardware
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namespace {
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sp<::android::hardware::ICameraService> gCameraService;
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const int kCameraServicePollDelay = 500000; // 0.5s
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const char* kCameraServiceName = "media.camera";
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Mutex gLock;
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class DeathNotifier : public IBinder::DeathRecipient
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{
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public:
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DeathNotifier() {
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}
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virtual void binderDied(const wp<IBinder>& /*who*/) {
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ALOGV("binderDied");
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Mutex::Autolock _l(gLock);
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gCameraService.clear();
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ALOGW("Camera service died!");
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}
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};
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sp<DeathNotifier> gDeathNotifier;
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}; // namespace anonymous
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///////////////////////////////////////////////////////////
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// CameraBase definition
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///////////////////////////////////////////////////////////
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// establish binder interface to camera service
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template <typename TCam, typename TCamTraits>
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const sp<::android::hardware::ICameraService> CameraBase<TCam, TCamTraits>::getCameraService()
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{
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Mutex::Autolock _l(gLock);
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if (gCameraService.get() == 0) {
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if (CameraUtils::isCameraServiceDisabled()) {
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return gCameraService;
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}
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sp<IServiceManager> sm = defaultServiceManager();
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sp<IBinder> binder;
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do {
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binder = sm->getService(String16(kCameraServiceName));
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if (binder != 0) {
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break;
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}
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ALOGW("CameraService not published, waiting...");
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usleep(kCameraServicePollDelay);
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} while(true);
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if (gDeathNotifier == NULL) {
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gDeathNotifier = new DeathNotifier();
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}
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binder->linkToDeath(gDeathNotifier);
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gCameraService = interface_cast<::android::hardware::ICameraService>(binder);
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}
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ALOGE_IF(gCameraService == 0, "no CameraService!?");
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return gCameraService;
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}
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template <typename TCam, typename TCamTraits>
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sp<TCam> CameraBase<TCam, TCamTraits>::connect(int cameraId,
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const String16& clientPackageName,
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int clientUid, int clientPid, int targetSdkVersion)
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{
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ALOGV("%s: connect", __FUNCTION__);
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sp<TCam> c = new TCam(cameraId);
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sp<TCamCallbacks> cl = c;
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const sp<::android::hardware::ICameraService> cs = getCameraService();
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binder::Status ret;
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if (cs != nullptr) {
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TCamConnectService fnConnectService = TCamTraits::fnConnectService;
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ret = (cs.get()->*fnConnectService)(cl, cameraId, clientPackageName, clientUid,
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clientPid, targetSdkVersion, /*out*/ &c->mCamera);
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}
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if (ret.isOk() && c->mCamera != nullptr) {
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IInterface::asBinder(c->mCamera)->linkToDeath(c);
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c->mStatus = NO_ERROR;
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} else {
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ALOGW("An error occurred while connecting to camera %d: %s", cameraId,
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(cs == nullptr) ? "Service not available" : ret.toString8().string());
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c.clear();
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}
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return c;
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}
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template <typename TCam, typename TCamTraits>
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void CameraBase<TCam, TCamTraits>::disconnect()
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{
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ALOGV("%s: disconnect", __FUNCTION__);
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if (mCamera != 0) {
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mCamera->disconnect();
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IInterface::asBinder(mCamera)->unlinkToDeath(this);
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mCamera = 0;
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}
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ALOGV("%s: disconnect (done)", __FUNCTION__);
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}
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template <typename TCam, typename TCamTraits>
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CameraBase<TCam, TCamTraits>::CameraBase(int cameraId) :
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mStatus(UNKNOWN_ERROR),
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mCameraId(cameraId)
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{
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}
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template <typename TCam, typename TCamTraits>
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CameraBase<TCam, TCamTraits>::~CameraBase()
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{
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}
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template <typename TCam, typename TCamTraits>
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sp<typename TCamTraits::TCamUser> CameraBase<TCam, TCamTraits>::remote()
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{
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return mCamera;
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}
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template <typename TCam, typename TCamTraits>
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status_t CameraBase<TCam, TCamTraits>::getStatus()
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{
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return mStatus;
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}
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template <typename TCam, typename TCamTraits>
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void CameraBase<TCam, TCamTraits>::binderDied(const wp<IBinder>& /*who*/) {
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ALOGW("mediaserver's remote binder Camera object died");
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notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_SERVER_DIED, /*ext2*/0);
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}
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template <typename TCam, typename TCamTraits>
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void CameraBase<TCam, TCamTraits>::setListener(const sp<TCamListener>& listener)
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{
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Mutex::Autolock _l(mLock);
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mListener = listener;
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}
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// callback from camera service
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template <typename TCam, typename TCamTraits>
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void CameraBase<TCam, TCamTraits>::notifyCallback(int32_t msgType,
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int32_t ext1,
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int32_t ext2)
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{
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sp<TCamListener> listener;
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{
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Mutex::Autolock _l(mLock);
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listener = mListener;
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}
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if (listener != NULL) {
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listener->notify(msgType, ext1, ext2);
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}
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}
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template <typename TCam, typename TCamTraits>
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int CameraBase<TCam, TCamTraits>::getNumberOfCameras() {
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const sp<::android::hardware::ICameraService> cs = getCameraService();
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if (!cs.get()) {
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// as required by the public Java APIs
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return 0;
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}
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int32_t count;
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binder::Status res = cs->getNumberOfCameras(
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::android::hardware::ICameraService::CAMERA_TYPE_BACKWARD_COMPATIBLE,
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&count);
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if (!res.isOk()) {
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ALOGE("Error reading number of cameras: %s",
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res.toString8().string());
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count = 0;
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}
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return count;
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}
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// this can be in BaseCamera but it should be an instance method
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template <typename TCam, typename TCamTraits>
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status_t CameraBase<TCam, TCamTraits>::getCameraInfo(int cameraId,
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struct hardware::CameraInfo* cameraInfo) {
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const sp<::android::hardware::ICameraService> cs = getCameraService();
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if (cs == 0) return UNKNOWN_ERROR;
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binder::Status res = cs->getCameraInfo(cameraId, cameraInfo);
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return res.isOk() ? OK : res.serviceSpecificErrorCode();
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}
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template class CameraBase<Camera>;
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} // namespace android
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