394 lines
14 KiB
C++
394 lines
14 KiB
C++
/*
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* Copyright (C) 2021 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_TAG "CamPrvdr@2.7-external"
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//#define LOG_NDEBUG 0
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#include <log/log.h>
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#include <cutils/properties.h>
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#include <errno.h>
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#include <linux/videodev2.h>
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#include <sys/inotify.h>
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#include <regex>
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#include "ExternalCameraDevice_3_4.h"
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#include "ExternalCameraDevice_3_5.h"
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#include "ExternalCameraDevice_3_6.h"
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#include "ExternalCameraProviderImpl_2_7.h"
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namespace android {
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namespace hardware {
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namespace camera {
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namespace provider {
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namespace V2_7 {
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namespace implementation {
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namespace {
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// "device@<version>/external/<id>"
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const std::regex kDeviceNameRE("device@([0-9]+\\.[0-9]+)/external/(.+)");
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const int kMaxDevicePathLen = 256;
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const char* kDevicePath = "/dev/";
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constexpr char kPrefix[] = "video";
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constexpr int kPrefixLen = sizeof(kPrefix) - 1;
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constexpr int kDevicePrefixLen = sizeof(kDevicePath) + kPrefixLen + 1;
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bool matchDeviceName(int cameraIdOffset, const hidl_string& deviceName, std::string* deviceVersion,
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std::string* cameraDevicePath) {
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std::string deviceNameStd(deviceName.c_str());
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std::smatch sm;
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if (std::regex_match(deviceNameStd, sm, kDeviceNameRE)) {
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if (deviceVersion != nullptr) {
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*deviceVersion = sm[1];
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}
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if (cameraDevicePath != nullptr) {
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*cameraDevicePath = "/dev/video" + std::to_string(std::stoi(sm[2]) - cameraIdOffset);
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}
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return true;
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}
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return false;
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}
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} // anonymous namespace
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ExternalCameraProviderImpl_2_7::ExternalCameraProviderImpl_2_7()
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: mCfg(ExternalCameraConfig::loadFromCfg()) {
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mHotPlugThread = sp<HotplugThread>::make(this);
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mHotPlugThread->run("ExtCamHotPlug", PRIORITY_BACKGROUND);
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mPreferredHal3MinorVersion =
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property_get_int32("ro.vendor.camera.external.hal3TrebleMinorVersion", 4);
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ALOGV("Preferred HAL 3 minor version is %d", mPreferredHal3MinorVersion);
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switch (mPreferredHal3MinorVersion) {
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case 4:
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case 5:
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case 6:
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// OK
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break;
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default:
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ALOGW("Unknown minor camera device HAL version %d in property "
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"'camera.external.hal3TrebleMinorVersion', defaulting to 4",
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mPreferredHal3MinorVersion);
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mPreferredHal3MinorVersion = 4;
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}
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}
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ExternalCameraProviderImpl_2_7::~ExternalCameraProviderImpl_2_7() {
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mHotPlugThread->requestExit();
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}
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Return<Status> ExternalCameraProviderImpl_2_7::setCallback(
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const sp<ICameraProviderCallback>& callback) {
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Mutex::Autolock _l(mLock);
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mCallbacks = callback;
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if (mCallbacks == nullptr) {
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return Status::OK;
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}
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// Send a callback for all devices to initialize
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{
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for (const auto& pair : mCameraStatusMap) {
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mCallbacks->cameraDeviceStatusChange(pair.first, pair.second);
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}
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}
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return Status::OK;
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}
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Return<void> ExternalCameraProviderImpl_2_7::getVendorTags(
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ICameraProvider::getVendorTags_cb _hidl_cb) {
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// No vendor tag support for USB camera
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hidl_vec<VendorTagSection> zeroSections;
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_hidl_cb(Status::OK, zeroSections);
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return Void();
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}
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Return<void> ExternalCameraProviderImpl_2_7::getCameraIdList(
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ICameraProvider::getCameraIdList_cb _hidl_cb) {
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// External camera HAL always report 0 camera, and extra cameras
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// are just reported via cameraDeviceStatusChange callbacks
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hidl_vec<hidl_string> hidlDeviceNameList;
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_hidl_cb(Status::OK, hidlDeviceNameList);
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return Void();
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}
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void ExternalCameraProviderImpl_2_7::updateAttachedCameras() {
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ALOGV("%s start scaning for existing V4L2 devices", __FUNCTION__);
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// Find existing /dev/video* devices
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DIR* devdir = opendir(kDevicePath);
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if (devdir == 0) {
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ALOGE("%s: cannot open %s! Exiting threadloop", __FUNCTION__, kDevicePath);
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return;
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}
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struct dirent* de;
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while ((de = readdir(devdir)) != 0) {
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// Find external v4l devices that's existing before we start watching and add them
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if (!strncmp(kPrefix, de->d_name, kPrefixLen)) {
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// TODO: This might reject some valid devices. Ex: internal is 33 and a device named 3
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// is added.
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std::string deviceId(de->d_name + kPrefixLen);
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if (mCfg.mInternalDevices.count(deviceId) == 0) {
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ALOGV("Non-internal v4l device %s found", de->d_name);
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char v4l2DevicePath[kMaxDevicePathLen];
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snprintf(v4l2DevicePath, kMaxDevicePathLen, "%s%s", kDevicePath, de->d_name);
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deviceAdded(v4l2DevicePath);
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}
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}
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}
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closedir(devdir);
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}
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Return<void> ExternalCameraProviderImpl_2_7::isSetTorchModeSupported(
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ICameraProvider::isSetTorchModeSupported_cb _hidl_cb) {
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// setTorchMode API is supported, though right now no external camera device
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// has a flash unit.
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_hidl_cb(Status::OK, true);
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return Void();
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}
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Return<void> ExternalCameraProviderImpl_2_7::getCameraDeviceInterface_V1_x(
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const hidl_string&, ICameraProvider::getCameraDeviceInterface_V1_x_cb _hidl_cb) {
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// External Camera HAL does not support HAL1
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_hidl_cb(Status::OPERATION_NOT_SUPPORTED, nullptr);
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return Void();
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}
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Return<void> ExternalCameraProviderImpl_2_7::getCameraDeviceInterface_V3_x(
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const hidl_string& cameraDeviceName,
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ICameraProvider::getCameraDeviceInterface_V3_x_cb _hidl_cb) {
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std::string cameraDevicePath, deviceVersion;
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bool match = matchDeviceName(mCfg.cameraIdOffset, cameraDeviceName, &deviceVersion,
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&cameraDevicePath);
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if (!match) {
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_hidl_cb(Status::ILLEGAL_ARGUMENT, nullptr);
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return Void();
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}
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if (mCameraStatusMap.count(cameraDeviceName) == 0 ||
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mCameraStatusMap[cameraDeviceName] != CameraDeviceStatus::PRESENT) {
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_hidl_cb(Status::ILLEGAL_ARGUMENT, nullptr);
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return Void();
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}
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sp<device::V3_4::implementation::ExternalCameraDevice> deviceImpl;
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switch (mPreferredHal3MinorVersion) {
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case 4: {
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ALOGV("Constructing v3.4 external camera device");
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deviceImpl =
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new device::V3_4::implementation::ExternalCameraDevice(cameraDevicePath, mCfg);
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break;
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}
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case 5: {
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ALOGV("Constructing v3.5 external camera device");
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deviceImpl =
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new device::V3_5::implementation::ExternalCameraDevice(cameraDevicePath, mCfg);
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break;
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}
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case 6: {
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ALOGV("Constructing v3.6 external camera device");
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deviceImpl =
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new device::V3_6::implementation::ExternalCameraDevice(cameraDevicePath, mCfg);
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break;
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}
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default:
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ALOGE("%s: Unknown HAL minor version %d!", __FUNCTION__, mPreferredHal3MinorVersion);
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_hidl_cb(Status::INTERNAL_ERROR, nullptr);
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return Void();
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}
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if (deviceImpl == nullptr || deviceImpl->isInitFailed()) {
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ALOGE("%s: camera device %s init failed!", __FUNCTION__, cameraDevicePath.c_str());
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_hidl_cb(Status::INTERNAL_ERROR, nullptr);
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return Void();
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}
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IF_ALOGV() {
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deviceImpl->getInterface()->interfaceChain(
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[](::android::hardware::hidl_vec<::android::hardware::hidl_string> interfaceChain) {
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ALOGV("Device interface chain:");
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for (auto iface : interfaceChain) {
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ALOGV(" %s", iface.c_str());
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}
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});
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}
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_hidl_cb(Status::OK, deviceImpl->getInterface());
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return Void();
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}
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void ExternalCameraProviderImpl_2_7::addExternalCamera(const char* devName) {
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ALOGV("ExtCam: adding %s to External Camera HAL!", devName);
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Mutex::Autolock _l(mLock);
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std::string deviceName;
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std::string cameraId =
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std::to_string(mCfg.cameraIdOffset + std::atoi(devName + kDevicePrefixLen));
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if (mPreferredHal3MinorVersion == 6) {
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deviceName = std::string("device@3.6/external/") + cameraId;
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} else if (mPreferredHal3MinorVersion == 5) {
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deviceName = std::string("device@3.5/external/") + cameraId;
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} else {
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deviceName = std::string("device@3.4/external/") + cameraId;
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}
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mCameraStatusMap[deviceName] = CameraDeviceStatus::PRESENT;
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if (mCallbacks != nullptr) {
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mCallbacks->cameraDeviceStatusChange(deviceName, CameraDeviceStatus::PRESENT);
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}
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}
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void ExternalCameraProviderImpl_2_7::deviceAdded(const char* devName) {
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{
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base::unique_fd fd(::open(devName, O_RDWR));
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if (fd.get() < 0) {
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ALOGE("%s open v4l2 device %s failed:%s", __FUNCTION__, devName, strerror(errno));
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return;
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}
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struct v4l2_capability capability;
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int ret = ioctl(fd.get(), VIDIOC_QUERYCAP, &capability);
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if (ret < 0) {
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ALOGE("%s v4l2 QUERYCAP %s failed", __FUNCTION__, devName);
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return;
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}
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if (!(capability.device_caps & V4L2_CAP_VIDEO_CAPTURE)) {
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ALOGW("%s device %s does not support VIDEO_CAPTURE", __FUNCTION__, devName);
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return;
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}
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}
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// See if we can initialize ExternalCameraDevice correctly
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sp<device::V3_4::implementation::ExternalCameraDevice> deviceImpl =
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new device::V3_4::implementation::ExternalCameraDevice(devName, mCfg);
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if (deviceImpl == nullptr || deviceImpl->isInitFailed()) {
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ALOGW("%s: Attempt to init camera device %s failed!", __FUNCTION__, devName);
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return;
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}
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deviceImpl.clear();
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addExternalCamera(devName);
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return;
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}
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void ExternalCameraProviderImpl_2_7::deviceRemoved(const char* devName) {
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Mutex::Autolock _l(mLock);
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std::string deviceName;
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std::string cameraId =
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std::to_string(mCfg.cameraIdOffset + std::atoi(devName + kDevicePrefixLen));
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if (mPreferredHal3MinorVersion == 6) {
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deviceName = std::string("device@3.6/external/") + cameraId;
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} else if (mPreferredHal3MinorVersion == 5) {
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deviceName = std::string("device@3.5/external/") + cameraId;
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} else {
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deviceName = std::string("device@3.4/external/") + cameraId;
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}
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if (mCameraStatusMap.erase(deviceName) != 0) {
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if (mCallbacks != nullptr) {
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mCallbacks->cameraDeviceStatusChange(deviceName, CameraDeviceStatus::NOT_PRESENT);
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}
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} else {
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ALOGE("%s: cannot find camera device %s", __FUNCTION__, devName);
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}
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}
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ExternalCameraProviderImpl_2_7::HotplugThread::HotplugThread(ExternalCameraProviderImpl_2_7* parent)
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: Thread(/*canCallJava*/ false),
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mParent(parent),
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mInternalDevices(parent->mCfg.mInternalDevices) {}
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ExternalCameraProviderImpl_2_7::HotplugThread::~HotplugThread() {}
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bool ExternalCameraProviderImpl_2_7::HotplugThread::threadLoop() {
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// Update existing cameras
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mParent->updateAttachedCameras();
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// Watch new video devices
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mINotifyFD = inotify_init();
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if (mINotifyFD < 0) {
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ALOGE("%s: inotify init failed! Exiting threadloop", __FUNCTION__);
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return true;
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}
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mWd = inotify_add_watch(mINotifyFD, kDevicePath, IN_CREATE | IN_DELETE);
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if (mWd < 0) {
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ALOGE("%s: inotify add watch failed! Exiting threadloop", __FUNCTION__);
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return true;
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}
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bool done = false;
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char eventBuf[512];
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while (!done) {
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int offset = 0;
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int ret = read(mINotifyFD, eventBuf, sizeof(eventBuf));
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if (ret >= (int)sizeof(struct inotify_event)) {
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while (offset < ret) {
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struct inotify_event* event = (struct inotify_event*)&eventBuf[offset];
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if (event->wd == mWd) {
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ALOGV("%s inotify_event %s", __FUNCTION__, event->name);
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if (!strncmp(kPrefix, event->name, kPrefixLen)) {
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std::string deviceId(event->name + kPrefixLen);
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if (mInternalDevices.count(deviceId) == 0) {
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char v4l2DevicePath[kMaxDevicePathLen];
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snprintf(v4l2DevicePath, kMaxDevicePathLen, "%s%s", kDevicePath,
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event->name);
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if (event->mask & IN_CREATE) {
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mParent->deviceAdded(v4l2DevicePath);
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}
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if (event->mask & IN_DELETE) {
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mParent->deviceRemoved(v4l2DevicePath);
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}
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}
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}
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}
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offset += sizeof(struct inotify_event) + event->len;
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}
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}
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}
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return true;
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}
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Return<void> ExternalCameraProviderImpl_2_7::notifyDeviceStateChange(
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hidl_bitfield<DeviceState> /*newState*/) {
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return Void();
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}
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Return<void> ExternalCameraProviderImpl_2_7::getConcurrentStreamingCameraIds(
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ICameraProvider::getConcurrentStreamingCameraIds_cb _hidl_cb) {
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hidl_vec<hidl_vec<hidl_string>> hidl_camera_id_combinations;
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_hidl_cb(Status::OK, hidl_camera_id_combinations);
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return Void();
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}
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Return<void> ExternalCameraProviderImpl_2_7::isConcurrentStreamCombinationSupported(
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const hidl_vec<::android::hardware::camera::provider::V2_6::
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CameraIdAndStreamCombination>& /* configs */,
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ICameraProvider::isConcurrentStreamCombinationSupported_cb _hidl_cb) {
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_hidl_cb(Status::OK, false);
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return Void();
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}
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Return<void> ExternalCameraProviderImpl_2_7::isConcurrentStreamCombinationSupported_2_7(
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const hidl_vec<CameraIdAndStreamCombination>& /* configs */,
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ICameraProvider::isConcurrentStreamCombinationSupported_2_7_cb _hidl_cb) {
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_hidl_cb(Status::OK, false);
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return Void();
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}
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} // namespace implementation
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} // namespace V2_7
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} // namespace provider
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} // namespace camera
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} // namespace hardware
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} // namespace android
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