CameraService.cpp revision f67e23ef637d0b53a0d4bebb68c654234df3da94 
1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#define LOG_TAG "CameraService"
18//#define LOG_NDEBUG 0
19
20#include <stdio.h>
21#include <string.h>
22#include <sys/types.h>
23#include <pthread.h>
24
25#include <binder/AppOpsManager.h>
26#include <binder/IPCThreadState.h>
27#include <binder/IServiceManager.h>
28#include <binder/MemoryBase.h>
29#include <binder/MemoryHeapBase.h>
30#include <cutils/atomic.h>
31#include <cutils/properties.h>
32#include <gui/Surface.h>
33#include <hardware/hardware.h>
34#include <media/AudioSystem.h>
35#include <media/IMediaHTTPService.h>
36#include <media/mediaplayer.h>
37#include <utils/Errors.h>
38#include <utils/Log.h>
39#include <utils/String16.h>
40#include <utils/Trace.h>
41#include <system/camera_vendor_tags.h>
42#include <system/camera_metadata.h>
43#include <system/camera.h>
44
45#include "CameraService.h"
46#include "api1/CameraClient.h"
47#include "api1/Camera2Client.h"
48#include "api_pro/ProCamera2Client.h"
49#include "api2/CameraDeviceClient.h"
50#include "utils/CameraTraces.h"
51#include "CameraDeviceFactory.h"
52
53namespace android {
54
55// ----------------------------------------------------------------------------
56// Logging support -- this is for debugging only
57// Use "adb shell dumpsys media.camera -v 1" to change it.
58volatile int32_t gLogLevel = 0;
59
60#define LOG1(...) ALOGD_IF(gLogLevel >= 1, __VA_ARGS__);
61#define LOG2(...) ALOGD_IF(gLogLevel >= 2, __VA_ARGS__);
62
63static void setLogLevel(int level) {
64    android_atomic_write(level, &gLogLevel);
65}
66
67// ----------------------------------------------------------------------------
68
69static int getCallingPid() {
70    return IPCThreadState::self()->getCallingPid();
71}
72
73static int getCallingUid() {
74    return IPCThreadState::self()->getCallingUid();
75}
76
77extern "C" {
78static void camera_device_status_change(
79        const struct camera_module_callbacks* callbacks,
80        int camera_id,
81        int new_status) {
82    sp<CameraService> cs = const_cast<CameraService*>(
83                                static_cast<const CameraService*>(callbacks));
84
85    cs->onDeviceStatusChanged(
86        camera_id,
87        new_status);
88}
89} // extern "C"
90
91// ----------------------------------------------------------------------------
92
93// This is ugly and only safe if we never re-create the CameraService, but
94// should be ok for now.
95static CameraService *gCameraService;
96
97CameraService::CameraService()
98    :mSoundRef(0), mModule(0)
99{
100    ALOGI("CameraService started (pid=%d)", getpid());
101    gCameraService = this;
102
103    for (size_t i = 0; i < MAX_CAMERAS; ++i) {
104        mStatusList[i] = ICameraServiceListener::STATUS_PRESENT;
105    }
106
107    this->camera_device_status_change = android::camera_device_status_change;
108}
109
110void CameraService::onFirstRef()
111{
112    LOG1("CameraService::onFirstRef");
113
114    BnCameraService::onFirstRef();
115
116    if (hw_get_module(CAMERA_HARDWARE_MODULE_ID,
117                (const hw_module_t **)&mModule) < 0) {
118        ALOGE("Could not load camera HAL module");
119        mNumberOfCameras = 0;
120    }
121    else {
122        ALOGI("Loaded \"%s\" camera module", mModule->common.name);
123        mNumberOfCameras = mModule->get_number_of_cameras();
124        if (mNumberOfCameras > MAX_CAMERAS) {
125            ALOGE("Number of cameras(%d) > MAX_CAMERAS(%d).",
126                    mNumberOfCameras, MAX_CAMERAS);
127            mNumberOfCameras = MAX_CAMERAS;
128        }
129        for (int i = 0; i < mNumberOfCameras; i++) {
130            setCameraFree(i);
131        }
132
133        if (mModule->common.module_api_version >=
134                CAMERA_MODULE_API_VERSION_2_1) {
135            mModule->set_callbacks(this);
136        }
137
138        VendorTagDescriptor::clearGlobalVendorTagDescriptor();
139
140        if (mModule->common.module_api_version >= CAMERA_MODULE_API_VERSION_2_2) {
141            setUpVendorTags();
142        }
143
144        CameraDeviceFactory::registerService(this);
145    }
146}
147
148CameraService::~CameraService() {
149    for (int i = 0; i < mNumberOfCameras; i++) {
150        if (mBusy[i]) {
151            ALOGE("camera %d is still in use in destructor!", i);
152        }
153    }
154
155    VendorTagDescriptor::clearGlobalVendorTagDescriptor();
156    gCameraService = NULL;
157}
158
159void CameraService::onDeviceStatusChanged(int cameraId,
160                                          int newStatus)
161{
162    ALOGI("%s: Status changed for cameraId=%d, newStatus=%d", __FUNCTION__,
163          cameraId, newStatus);
164
165    if (cameraId < 0 || cameraId >= MAX_CAMERAS) {
166        ALOGE("%s: Bad camera ID %d", __FUNCTION__, cameraId);
167        return;
168    }
169
170    if ((int)getStatus(cameraId) == newStatus) {
171        ALOGE("%s: State transition to the same status 0x%x not allowed",
172              __FUNCTION__, (uint32_t)newStatus);
173        return;
174    }
175
176    /* don't do this in updateStatus
177       since it is also called from connect and we could get into a deadlock */
178    if (newStatus == CAMERA_DEVICE_STATUS_NOT_PRESENT) {
179        Vector<sp<BasicClient> > clientsToDisconnect;
180        {
181           Mutex::Autolock al(mServiceLock);
182
183           /* Remove cached parameters from shim cache */
184           mShimParams.removeItem(cameraId);
185
186           /* Find all clients that we need to disconnect */
187           sp<BasicClient> client = mClient[cameraId].promote();
188           if (client.get() != NULL) {
189               clientsToDisconnect.push_back(client);
190           }
191
192           int i = cameraId;
193           for (size_t j = 0; j < mProClientList[i].size(); ++j) {
194               sp<ProClient> cl = mProClientList[i][j].promote();
195               if (cl != NULL) {
196                   clientsToDisconnect.push_back(cl);
197               }
198           }
199        }
200
201        /* now disconnect them. don't hold the lock
202           or we can get into a deadlock */
203
204        for (size_t i = 0; i < clientsToDisconnect.size(); ++i) {
205            sp<BasicClient> client = clientsToDisconnect[i];
206
207            client->disconnect();
208            /**
209             * The remote app will no longer be able to call methods on the
210             * client since the client PID will be reset to 0
211             */
212        }
213
214        ALOGV("%s: After unplug, disconnected %zu clients",
215              __FUNCTION__, clientsToDisconnect.size());
216    }
217
218    updateStatus(
219            static_cast<ICameraServiceListener::Status>(newStatus), cameraId);
220
221}
222
223int32_t CameraService::getNumberOfCameras() {
224    return mNumberOfCameras;
225}
226
227status_t CameraService::getCameraInfo(int cameraId,
228                                      struct CameraInfo* cameraInfo) {
229    if (!mModule) {
230        return -ENODEV;
231    }
232
233    if (cameraId < 0 || cameraId >= mNumberOfCameras) {
234        return BAD_VALUE;
235    }
236
237    struct camera_info info;
238    status_t rc = filterGetInfoErrorCode(
239        mModule->get_camera_info(cameraId, &info));
240    cameraInfo->facing = info.facing;
241    cameraInfo->orientation = info.orientation;
242    return rc;
243}
244
245
246status_t CameraService::generateShimMetadata(int cameraId, /*out*/CameraMetadata* cameraInfo) {
247    status_t ret = OK;
248    struct CameraInfo info;
249    if ((ret = getCameraInfo(cameraId, &info)) != OK) {
250        return ret;
251    }
252
253    CameraMetadata shimInfo;
254    int32_t orientation = static_cast<int32_t>(info.orientation);
255    if ((ret = shimInfo.update(ANDROID_SENSOR_ORIENTATION, &orientation, 1)) != OK) {
256        return ret;
257    }
258
259    uint8_t facing = (info.facing == CAMERA_FACING_FRONT) ?
260            ANDROID_LENS_FACING_FRONT : ANDROID_LENS_FACING_BACK;
261    if ((ret = shimInfo.update(ANDROID_LENS_FACING, &facing, 1)) != OK) {
262        return ret;
263    }
264
265    CameraParameters shimParams;
266    if ((ret = getLegacyParametersLazy(cameraId, /*out*/&shimParams)) != OK) {
267        // Error logged by callee
268        return ret;
269    }
270
271    Vector<Size> sizes;
272    Vector<Size> jpegSizes;
273    Vector<int32_t> formats;
274    const char* supportedPreviewFormats;
275    {
276        shimParams.getSupportedPreviewSizes(/*out*/sizes);
277        shimParams.getSupportedPreviewFormats(/*out*/formats);
278        shimParams.getSupportedPictureSizes(/*out*/jpegSizes);
279    }
280
281    // Always include IMPLEMENTATION_DEFINED
282    formats.add(HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED);
283
284    const size_t INTS_PER_CONFIG = 4;
285
286    // Build available stream configurations metadata
287    size_t streamConfigSize = (sizes.size() * formats.size() + jpegSizes.size()) * INTS_PER_CONFIG;
288
289    Vector<int32_t> streamConfigs;
290    streamConfigs.setCapacity(streamConfigSize);
291
292    for (size_t i = 0; i < formats.size(); ++i) {
293        for (size_t j = 0; j < sizes.size(); ++j) {
294            streamConfigs.add(formats[i]);
295            streamConfigs.add(sizes[j].width);
296            streamConfigs.add(sizes[j].height);
297            streamConfigs.add(ANDROID_SCALER_AVAILABLE_STREAM_CONFIGURATIONS_OUTPUT);
298        }
299    }
300
301    for (size_t i = 0; i < jpegSizes.size(); ++i) {
302        streamConfigs.add(HAL_PIXEL_FORMAT_BLOB);
303        streamConfigs.add(jpegSizes[i].width);
304        streamConfigs.add(jpegSizes[i].height);
305        streamConfigs.add(ANDROID_SCALER_AVAILABLE_STREAM_CONFIGURATIONS_OUTPUT);
306    }
307
308    if ((ret = shimInfo.update(ANDROID_SCALER_AVAILABLE_STREAM_CONFIGURATIONS,
309            streamConfigs.array(), streamConfigSize)) != OK) {
310        return ret;
311    }
312
313    int64_t fakeMinFrames[0];
314    // TODO: Fixme, don't fake min frame durations.
315    if ((ret = shimInfo.update(ANDROID_SCALER_AVAILABLE_MIN_FRAME_DURATIONS,
316            fakeMinFrames, 0)) != OK) {
317        return ret;
318    }
319
320    int64_t fakeStalls[0];
321    // TODO: Fixme, don't fake stall durations.
322    if ((ret = shimInfo.update(ANDROID_SCALER_AVAILABLE_STALL_DURATIONS,
323            fakeStalls, 0)) != OK) {
324        return ret;
325    }
326
327    *cameraInfo = shimInfo;
328    return OK;
329}
330
331status_t CameraService::getCameraCharacteristics(int cameraId,
332                                                CameraMetadata* cameraInfo) {
333    if (!cameraInfo) {
334        ALOGE("%s: cameraInfo is NULL", __FUNCTION__);
335        return BAD_VALUE;
336    }
337
338    if (!mModule) {
339        ALOGE("%s: camera hardware module doesn't exist", __FUNCTION__);
340        return -ENODEV;
341    }
342
343    if (cameraId < 0 || cameraId >= mNumberOfCameras) {
344        ALOGE("%s: Invalid camera id: %d", __FUNCTION__, cameraId);
345        return BAD_VALUE;
346    }
347
348    int facing;
349    status_t ret = OK;
350    if (mModule->common.module_api_version < CAMERA_MODULE_API_VERSION_2_0 ||
351            getDeviceVersion(cameraId, &facing) <= CAMERA_DEVICE_API_VERSION_2_1 ) {
352        /**
353         * Backwards compatibility mode for old HALs:
354         * - Convert CameraInfo into static CameraMetadata properties.
355         * - Retrieve cached CameraParameters for this camera.  If none exist,
356         *   attempt to open CameraClient and retrieve the CameraParameters.
357         * - Convert cached CameraParameters into static CameraMetadata
358         *   properties.
359         */
360        ALOGI("%s: Switching to HAL1 shim implementation...", __FUNCTION__);
361
362        if ((ret = generateShimMetadata(cameraId, cameraInfo)) != OK) {
363            return ret;
364        }
365
366    } else {
367        /**
368         * Normal HAL 2.1+ codepath.
369         */
370        struct camera_info info;
371        ret = filterGetInfoErrorCode(mModule->get_camera_info(cameraId, &info));
372        *cameraInfo = info.static_camera_characteristics;
373    }
374
375    return ret;
376}
377
378status_t CameraService::getCameraVendorTagDescriptor(/*out*/sp<VendorTagDescriptor>& desc) {
379    if (!mModule) {
380        ALOGE("%s: camera hardware module doesn't exist", __FUNCTION__);
381        return -ENODEV;
382    }
383
384    desc = VendorTagDescriptor::getGlobalVendorTagDescriptor();
385    return OK;
386}
387
388int CameraService::getDeviceVersion(int cameraId, int* facing) {
389    struct camera_info info;
390    if (mModule->get_camera_info(cameraId, &info) != OK) {
391        return -1;
392    }
393
394    int deviceVersion;
395    if (mModule->common.module_api_version >= CAMERA_MODULE_API_VERSION_2_0) {
396        deviceVersion = info.device_version;
397    } else {
398        deviceVersion = CAMERA_DEVICE_API_VERSION_1_0;
399    }
400
401    if (facing) {
402        *facing = info.facing;
403    }
404
405    return deviceVersion;
406}
407
408status_t CameraService::filterOpenErrorCode(status_t err) {
409    switch(err) {
410        case NO_ERROR:
411        case -EBUSY:
412        case -EINVAL:
413        case -EUSERS:
414            return err;
415        default:
416            break;
417    }
418    return -ENODEV;
419}
420
421status_t CameraService::filterGetInfoErrorCode(status_t err) {
422    switch(err) {
423        case NO_ERROR:
424        case -EINVAL:
425            return err;
426        default:
427            break;
428    }
429    return -ENODEV;
430}
431
432bool CameraService::setUpVendorTags() {
433    vendor_tag_ops_t vOps = vendor_tag_ops_t();
434
435    // Check if vendor operations have been implemented
436    if (mModule->get_vendor_tag_ops == NULL) {
437        ALOGI("%s: No vendor tags defined for this device.", __FUNCTION__);
438        return false;
439    }
440
441    ATRACE_BEGIN("camera3->get_metadata_vendor_tag_ops");
442    mModule->get_vendor_tag_ops(&vOps);
443    ATRACE_END();
444
445    // Ensure all vendor operations are present
446    if (vOps.get_tag_count == NULL || vOps.get_all_tags == NULL ||
447            vOps.get_section_name == NULL || vOps.get_tag_name == NULL ||
448            vOps.get_tag_type == NULL) {
449        ALOGE("%s: Vendor tag operations not fully defined. Ignoring definitions."
450               , __FUNCTION__);
451        return false;
452    }
453
454    // Read all vendor tag definitions into a descriptor
455    sp<VendorTagDescriptor> desc;
456    status_t res;
457    if ((res = VendorTagDescriptor::createDescriptorFromOps(&vOps, /*out*/desc))
458            != OK) {
459        ALOGE("%s: Could not generate descriptor from vendor tag operations,"
460              "received error %s (%d). Camera clients will not be able to use"
461              "vendor tags", __FUNCTION__, strerror(res), res);
462        return false;
463    }
464
465    // Set the global descriptor to use with camera metadata
466    VendorTagDescriptor::setAsGlobalVendorTagDescriptor(desc);
467    return true;
468}
469
470status_t CameraService::initializeShimMetadata(int cameraId) {
471    int pid = getCallingPid();
472    int uid = getCallingUid();
473    status_t ret = validateConnect(cameraId, uid);
474    if (ret != OK) {
475        // Error already logged by callee
476        return ret;
477    }
478
479    bool needsNewClient = false;
480    sp<Client> client;
481
482    String16 internalPackageName("media");
483    {   // Scope for service lock
484        Mutex::Autolock lock(mServiceLock);
485        if (mClient[cameraId] != NULL) {
486            client = static_cast<Client*>(mClient[cameraId].promote().get());
487        }
488        if (client == NULL) {
489            needsNewClient = true;
490            ret = connectHelperLocked(/*cameraClient*/NULL, // Empty binder callbacks
491                                      cameraId,
492                                      internalPackageName,
493                                      uid,
494                                      pid,
495                                      client);
496
497            if (ret != OK) {
498                // Error already logged by callee
499                return ret;
500            }
501        }
502
503        if (client == NULL) {
504            ALOGE("%s: Could not connect to client camera device.", __FUNCTION__);
505            return BAD_VALUE;
506        }
507
508        String8 rawParams = client->getParameters();
509        CameraParameters params(rawParams);
510        mShimParams.add(cameraId, params);
511    }
512
513    // Close client if one was opened solely for this call
514    if (needsNewClient) {
515        client->disconnect();
516    }
517    return OK;
518}
519
520status_t CameraService::getLegacyParametersLazy(int cameraId,
521        /*out*/
522        CameraParameters* parameters) {
523
524    ALOGV("%s: for cameraId: %d", __FUNCTION__, cameraId);
525
526    status_t ret = 0;
527
528    if (parameters == NULL) {
529        ALOGE("%s: parameters must not be null", __FUNCTION__);
530        return BAD_VALUE;
531    }
532
533    ssize_t index = -1;
534    {   // Scope for service lock
535        Mutex::Autolock lock(mServiceLock);
536        index = mShimParams.indexOfKey(cameraId);
537        // Release service lock so initializeShimMetadata can be called correctly.
538
539        if (index >= 0) {
540            *parameters = mShimParams[index];
541        }
542    }
543
544    if (index < 0) {
545        int64_t token = IPCThreadState::self()->clearCallingIdentity();
546        ret = initializeShimMetadata(cameraId);
547        IPCThreadState::self()->restoreCallingIdentity(token);
548        if (ret != OK) {
549            // Error already logged by callee
550            return ret;
551        }
552
553        {   // Scope for service lock
554            Mutex::Autolock lock(mServiceLock);
555            index = mShimParams.indexOfKey(cameraId);
556
557            LOG_ALWAYS_FATAL_IF(index < 0, "index should have been initialized");
558
559            *parameters = mShimParams[index];
560        }
561    }
562
563    return OK;
564}
565
566status_t CameraService::validateConnect(int cameraId,
567                                    /*inout*/
568                                    int& clientUid) const {
569
570    int callingPid = getCallingPid();
571
572    if (clientUid == USE_CALLING_UID) {
573        clientUid = getCallingUid();
574    } else {
575        // We only trust our own process to forward client UIDs
576        if (callingPid != getpid()) {
577            ALOGE("CameraService::connect X (pid %d) rejected (don't trust clientUid)",
578                    callingPid);
579            return PERMISSION_DENIED;
580        }
581    }
582
583    if (!mModule) {
584        ALOGE("Camera HAL module not loaded");
585        return -ENODEV;
586    }
587
588    if (cameraId < 0 || cameraId >= mNumberOfCameras) {
589        ALOGE("CameraService::connect X (pid %d) rejected (invalid cameraId %d).",
590            callingPid, cameraId);
591        return -ENODEV;
592    }
593
594    char value[PROPERTY_VALUE_MAX];
595    property_get("sys.secpolicy.camera.disabled", value, "0");
596    if (strcmp(value, "1") == 0) {
597        // Camera is disabled by DevicePolicyManager.
598        ALOGI("Camera is disabled. connect X (pid %d) rejected", callingPid);
599        return -EACCES;
600    }
601
602    ICameraServiceListener::Status currentStatus = getStatus(cameraId);
603    if (currentStatus == ICameraServiceListener::STATUS_NOT_PRESENT) {
604        ALOGI("Camera is not plugged in,"
605               " connect X (pid %d) rejected", callingPid);
606        return -ENODEV;
607    } else if (currentStatus == ICameraServiceListener::STATUS_ENUMERATING) {
608        ALOGI("Camera is enumerating,"
609               " connect X (pid %d) rejected", callingPid);
610        return -EBUSY;
611    }
612    // Else don't check for STATUS_NOT_AVAILABLE.
613    //  -- It's done implicitly in canConnectUnsafe /w the mBusy array
614
615    return OK;
616}
617
618bool CameraService::canConnectUnsafe(int cameraId,
619                                     const String16& clientPackageName,
620                                     const sp<IBinder>& remoteCallback,
621                                     sp<BasicClient> &client) {
622    String8 clientName8(clientPackageName);
623    int callingPid = getCallingPid();
624
625    if (mClient[cameraId] != 0) {
626        client = mClient[cameraId].promote();
627        if (client != 0) {
628            if (remoteCallback == client->getRemote()) {
629                LOG1("CameraService::connect X (pid %d) (the same client)",
630                     callingPid);
631                return true;
632            } else {
633                // TODOSC: need to support 1 regular client,
634                // multiple shared clients here
635                ALOGW("CameraService::connect X (pid %d) rejected"
636                      " (existing client).", callingPid);
637                return false;
638            }
639        }
640        mClient[cameraId].clear();
641    }
642
643    /*
644    mBusy is set to false as the last step of the Client destructor,
645    after which it is guaranteed that the Client destructor has finished (
646    including any inherited destructors)
647
648    We only need this for a Client subclasses since we don't allow
649    multiple Clents to be opened concurrently, but multiple BasicClient
650    would be fine
651    */
652    if (mBusy[cameraId]) {
653        ALOGW("CameraService::connect X (pid %d, \"%s\") rejected"
654                " (camera %d is still busy).", callingPid,
655                clientName8.string(), cameraId);
656        return false;
657    }
658
659    return true;
660}
661
662status_t CameraService::connectHelperLocked(const sp<ICameraClient>& cameraClient,
663                                      int cameraId,
664                                      const String16& clientPackageName,
665                                      int clientUid,
666                                      int callingPid,
667                                      /*out*/
668                                      sp<Client>& client,
669                                      int halVersion) {
670
671    int facing = -1;
672    int deviceVersion = getDeviceVersion(cameraId, &facing);
673
674    if (halVersion < 0 || halVersion == deviceVersion) {
675        // Default path: HAL version is unspecified by caller, create CameraClient
676        // based on device version reported by the HAL.
677        switch(deviceVersion) {
678          case CAMERA_DEVICE_API_VERSION_1_0:
679            client = new CameraClient(this, cameraClient,
680                    clientPackageName, cameraId,
681                    facing, callingPid, clientUid, getpid());
682            break;
683          case CAMERA_DEVICE_API_VERSION_2_0:
684          case CAMERA_DEVICE_API_VERSION_2_1:
685          case CAMERA_DEVICE_API_VERSION_3_0:
686          case CAMERA_DEVICE_API_VERSION_3_1:
687          case CAMERA_DEVICE_API_VERSION_3_2:
688            client = new Camera2Client(this, cameraClient,
689                    clientPackageName, cameraId,
690                    facing, callingPid, clientUid, getpid());
691            break;
692          case -1:
693            ALOGE("Invalid camera id %d", cameraId);
694            return BAD_VALUE;
695          default:
696            ALOGE("Unknown camera device HAL version: %d", deviceVersion);
697            return INVALID_OPERATION;
698        }
699    } else {
700        // A particular HAL version is requested by caller. Create CameraClient
701        // based on the requested HAL version.
702        if (deviceVersion > CAMERA_DEVICE_API_VERSION_1_0 &&
703            halVersion == CAMERA_DEVICE_API_VERSION_1_0) {
704            // Only support higher HAL version device opened as HAL1.0 device.
705            client = new CameraClient(this, cameraClient,
706                    clientPackageName, cameraId,
707                    facing, callingPid, clientUid, getpid());
708        } else {
709            // Other combinations (e.g. HAL3.x open as HAL2.x) are not supported yet.
710            ALOGE("Invalid camera HAL version %x: HAL %x device can only be"
711                    " opened as HAL %x device", halVersion, deviceVersion,
712                    CAMERA_DEVICE_API_VERSION_1_0);
713            return INVALID_OPERATION;
714        }
715    }
716
717    status_t status = connectFinishUnsafe(client, client->getRemote());
718    if (status != OK) {
719        // this is probably not recoverable.. maybe the client can try again
720        return status;
721    }
722
723    mClient[cameraId] = client;
724    LOG1("CameraService::connect X (id %d, this pid is %d)", cameraId,
725         getpid());
726
727    return OK;
728}
729
730status_t CameraService::connect(
731        const sp<ICameraClient>& cameraClient,
732        int cameraId,
733        const String16& clientPackageName,
734        int clientUid,
735        /*out*/
736        sp<ICamera>& device) {
737
738    String8 clientName8(clientPackageName);
739    int callingPid = getCallingPid();
740
741    LOG1("CameraService::connect E (pid %d \"%s\", id %d)", callingPid,
742            clientName8.string(), cameraId);
743
744    status_t status = validateConnect(cameraId, /*inout*/clientUid);
745    if (status != OK) {
746        return status;
747    }
748
749
750    sp<Client> client;
751    {
752        Mutex::Autolock lock(mServiceLock);
753        sp<BasicClient> clientTmp;
754        if (!canConnectUnsafe(cameraId, clientPackageName,
755                              cameraClient->asBinder(),
756                              /*out*/clientTmp)) {
757            return -EBUSY;
758        } else if (client.get() != NULL) {
759            device = static_cast<Client*>(clientTmp.get());
760            return OK;
761        }
762
763        status = connectHelperLocked(cameraClient,
764                                     cameraId,
765                                     clientPackageName,
766                                     clientUid,
767                                     callingPid,
768                                     client);
769        if (status != OK) {
770            return status;
771        }
772
773    }
774    // important: release the mutex here so the client can call back
775    //    into the service from its destructor (can be at the end of the call)
776
777    device = client;
778    return OK;
779}
780
781status_t CameraService::connectLegacy(
782        const sp<ICameraClient>& cameraClient,
783        int cameraId, int halVersion,
784        const String16& clientPackageName,
785        int clientUid,
786        /*out*/
787        sp<ICamera>& device) {
788
789    if (halVersion != CAMERA_HAL_API_VERSION_UNSPECIFIED &&
790            mModule->common.module_api_version < CAMERA_MODULE_API_VERSION_2_3) {
791        /*
792         * Either the HAL version is unspecified in which case this just creates
793         * a camera client selected by the latest device version, or
794         * it's a particular version in which case the HAL must supported
795         * the open_legacy call
796         */
797        ALOGE("%s: camera HAL module version %x doesn't support connecting to legacy HAL devices!",
798                __FUNCTION__, mModule->common.module_api_version);
799        return INVALID_OPERATION;
800    }
801
802    String8 clientName8(clientPackageName);
803    int callingPid = getCallingPid();
804
805    LOG1("CameraService::connect legacy E (pid %d \"%s\", id %d)", callingPid,
806            clientName8.string(), cameraId);
807
808    status_t status = validateConnect(cameraId, /*inout*/clientUid);
809    if (status != OK) {
810        return status;
811    }
812
813    sp<Client> client;
814    {
815        Mutex::Autolock lock(mServiceLock);
816        sp<BasicClient> clientTmp;
817        if (!canConnectUnsafe(cameraId, clientPackageName,
818                              cameraClient->asBinder(),
819                              /*out*/clientTmp)) {
820            return -EBUSY;
821        } else if (client.get() != NULL) {
822            device = static_cast<Client*>(clientTmp.get());
823            return OK;
824        }
825
826        status = connectHelperLocked(cameraClient,
827                                     cameraId,
828                                     clientPackageName,
829                                     clientUid,
830                                     callingPid,
831                                     client,
832                                     halVersion);
833        if (status != OK) {
834            return status;
835        }
836
837    }
838    // important: release the mutex here so the client can call back
839    //    into the service from its destructor (can be at the end of the call)
840
841    device = client;
842    return OK;
843}
844
845status_t CameraService::connectFinishUnsafe(const sp<BasicClient>& client,
846                                            const sp<IBinder>& remoteCallback) {
847    status_t status = client->initialize(mModule);
848    if (status != OK) {
849        return status;
850    }
851    if (remoteCallback != NULL) {
852        remoteCallback->linkToDeath(this);
853    }
854
855    return OK;
856}
857
858status_t CameraService::connectPro(
859                                        const sp<IProCameraCallbacks>& cameraCb,
860                                        int cameraId,
861                                        const String16& clientPackageName,
862                                        int clientUid,
863                                        /*out*/
864                                        sp<IProCameraUser>& device)
865{
866    if (cameraCb == 0) {
867        ALOGE("%s: Callback must not be null", __FUNCTION__);
868        return BAD_VALUE;
869    }
870
871    String8 clientName8(clientPackageName);
872    int callingPid = getCallingPid();
873
874    LOG1("CameraService::connectPro E (pid %d \"%s\", id %d)", callingPid,
875            clientName8.string(), cameraId);
876    status_t status = validateConnect(cameraId, /*inout*/clientUid);
877    if (status != OK) {
878        return status;
879    }
880
881    sp<ProClient> client;
882    {
883        Mutex::Autolock lock(mServiceLock);
884        {
885            sp<BasicClient> client;
886            if (!canConnectUnsafe(cameraId, clientPackageName,
887                                  cameraCb->asBinder(),
888                                  /*out*/client)) {
889                return -EBUSY;
890            }
891        }
892
893        int facing = -1;
894        int deviceVersion = getDeviceVersion(cameraId, &facing);
895
896        switch(deviceVersion) {
897          case CAMERA_DEVICE_API_VERSION_1_0:
898            ALOGE("Camera id %d uses HALv1, doesn't support ProCamera",
899                  cameraId);
900            return -EOPNOTSUPP;
901            break;
902          case CAMERA_DEVICE_API_VERSION_2_0:
903          case CAMERA_DEVICE_API_VERSION_2_1:
904          case CAMERA_DEVICE_API_VERSION_3_0:
905          case CAMERA_DEVICE_API_VERSION_3_1:
906          case CAMERA_DEVICE_API_VERSION_3_2:
907            client = new ProCamera2Client(this, cameraCb, clientPackageName,
908                    cameraId, facing, callingPid, clientUid, getpid());
909            break;
910          case -1:
911            ALOGE("Invalid camera id %d", cameraId);
912            return BAD_VALUE;
913          default:
914            ALOGE("Unknown camera device HAL version: %d", deviceVersion);
915            return INVALID_OPERATION;
916        }
917
918        status_t status = connectFinishUnsafe(client, client->getRemote());
919        if (status != OK) {
920            return status;
921        }
922
923        mProClientList[cameraId].push(client);
924
925        LOG1("CameraService::connectPro X (id %d, this pid is %d)", cameraId,
926                getpid());
927    }
928    // important: release the mutex here so the client can call back
929    //    into the service from its destructor (can be at the end of the call)
930    device = client;
931    return OK;
932}
933
934status_t CameraService::connectDevice(
935        const sp<ICameraDeviceCallbacks>& cameraCb,
936        int cameraId,
937        const String16& clientPackageName,
938        int clientUid,
939        /*out*/
940        sp<ICameraDeviceUser>& device)
941{
942
943    String8 clientName8(clientPackageName);
944    int callingPid = getCallingPid();
945
946    LOG1("CameraService::connectDevice E (pid %d \"%s\", id %d)", callingPid,
947            clientName8.string(), cameraId);
948
949    status_t status = validateConnect(cameraId, /*inout*/clientUid);
950    if (status != OK) {
951        return status;
952    }
953
954    sp<CameraDeviceClient> client;
955    {
956        Mutex::Autolock lock(mServiceLock);
957        {
958            sp<BasicClient> client;
959            if (!canConnectUnsafe(cameraId, clientPackageName,
960                                  cameraCb->asBinder(),
961                                  /*out*/client)) {
962                return -EBUSY;
963            }
964        }
965
966        int facing = -1;
967        int deviceVersion = getDeviceVersion(cameraId, &facing);
968
969        switch(deviceVersion) {
970          case CAMERA_DEVICE_API_VERSION_1_0:
971            ALOGW("Camera using old HAL version: %d", deviceVersion);
972            return -EOPNOTSUPP;
973           // TODO: don't allow 2.0  Only allow 2.1 and higher
974          case CAMERA_DEVICE_API_VERSION_2_0:
975          case CAMERA_DEVICE_API_VERSION_2_1:
976          case CAMERA_DEVICE_API_VERSION_3_0:
977          case CAMERA_DEVICE_API_VERSION_3_1:
978          case CAMERA_DEVICE_API_VERSION_3_2:
979            client = new CameraDeviceClient(this, cameraCb, clientPackageName,
980                    cameraId, facing, callingPid, clientUid, getpid());
981            break;
982          case -1:
983            ALOGE("Invalid camera id %d", cameraId);
984            return BAD_VALUE;
985          default:
986            ALOGE("Unknown camera device HAL version: %d", deviceVersion);
987            return INVALID_OPERATION;
988        }
989
990        status_t status = connectFinishUnsafe(client, client->getRemote());
991        if (status != OK) {
992            // this is probably not recoverable.. maybe the client can try again
993            return status;
994        }
995
996        LOG1("CameraService::connectDevice X (id %d, this pid is %d)", cameraId,
997                getpid());
998
999        mClient[cameraId] = client;
1000    }
1001    // important: release the mutex here so the client can call back
1002    //    into the service from its destructor (can be at the end of the call)
1003
1004    device = client;
1005    return OK;
1006}
1007
1008
1009status_t CameraService::addListener(
1010                                const sp<ICameraServiceListener>& listener) {
1011    ALOGV("%s: Add listener %p", __FUNCTION__, listener.get());
1012
1013    if (listener == 0) {
1014        ALOGE("%s: Listener must not be null", __FUNCTION__);
1015        return BAD_VALUE;
1016    }
1017
1018    Mutex::Autolock lock(mServiceLock);
1019
1020    Vector<sp<ICameraServiceListener> >::iterator it, end;
1021    for (it = mListenerList.begin(); it != mListenerList.end(); ++it) {
1022        if ((*it)->asBinder() == listener->asBinder()) {
1023            ALOGW("%s: Tried to add listener %p which was already subscribed",
1024                  __FUNCTION__, listener.get());
1025            return ALREADY_EXISTS;
1026        }
1027    }
1028
1029    mListenerList.push_back(listener);
1030
1031    /* Immediately signal current status to this listener only */
1032    {
1033        Mutex::Autolock m(mStatusMutex) ;
1034        int numCams = getNumberOfCameras();
1035        for (int i = 0; i < numCams; ++i) {
1036            listener->onStatusChanged(mStatusList[i], i);
1037        }
1038    }
1039
1040    return OK;
1041}
1042status_t CameraService::removeListener(
1043                                const sp<ICameraServiceListener>& listener) {
1044    ALOGV("%s: Remove listener %p", __FUNCTION__, listener.get());
1045
1046    if (listener == 0) {
1047        ALOGE("%s: Listener must not be null", __FUNCTION__);
1048        return BAD_VALUE;
1049    }
1050
1051    Mutex::Autolock lock(mServiceLock);
1052
1053    Vector<sp<ICameraServiceListener> >::iterator it;
1054    for (it = mListenerList.begin(); it != mListenerList.end(); ++it) {
1055        if ((*it)->asBinder() == listener->asBinder()) {
1056            mListenerList.erase(it);
1057            return OK;
1058        }
1059    }
1060
1061    ALOGW("%s: Tried to remove a listener %p which was not subscribed",
1062          __FUNCTION__, listener.get());
1063
1064    return BAD_VALUE;
1065}
1066
1067status_t CameraService::getLegacyParameters(
1068            int cameraId,
1069            /*out*/
1070            String16* parameters) {
1071    ALOGV("%s: for camera ID = %d", __FUNCTION__, cameraId);
1072
1073    if (parameters == NULL) {
1074        ALOGE("%s: parameters must not be null", __FUNCTION__);
1075        return BAD_VALUE;
1076    }
1077
1078    status_t ret = 0;
1079
1080    CameraParameters shimParams;
1081    if ((ret = getLegacyParametersLazy(cameraId, /*out*/&shimParams)) != OK) {
1082        // Error logged by caller
1083        return ret;
1084    }
1085
1086    String8 shimParamsString8 = shimParams.flatten();
1087    String16 shimParamsString16 = String16(shimParamsString8);
1088
1089    *parameters = shimParamsString16;
1090
1091    return OK;
1092}
1093
1094status_t CameraService::supportsCameraApi(int cameraId, int apiVersion) {
1095    ALOGV("%s: for camera ID = %d", __FUNCTION__, cameraId);
1096
1097    switch (apiVersion) {
1098        case API_VERSION_1:
1099        case API_VERSION_2:
1100            break;
1101        default:
1102            ALOGE("%s: Bad API version %d", __FUNCTION__, apiVersion);
1103            return BAD_VALUE;
1104    }
1105
1106    int facing = -1;
1107    int deviceVersion = getDeviceVersion(cameraId, &facing);
1108
1109    switch(deviceVersion) {
1110      case CAMERA_DEVICE_API_VERSION_1_0:
1111      case CAMERA_DEVICE_API_VERSION_2_0:
1112      case CAMERA_DEVICE_API_VERSION_2_1:
1113      case CAMERA_DEVICE_API_VERSION_3_0:
1114      case CAMERA_DEVICE_API_VERSION_3_1:
1115        if (apiVersion == API_VERSION_2) {
1116            ALOGV("%s: Camera id %d uses HAL prior to HAL3.2, doesn't support api2 without shim",
1117                    __FUNCTION__, cameraId);
1118            return -EOPNOTSUPP;
1119        } else { // if (apiVersion == API_VERSION_1) {
1120            ALOGV("%s: Camera id %d uses older HAL before 3.2, but api1 is always supported",
1121                    __FUNCTION__, cameraId);
1122            return OK;
1123        }
1124      case CAMERA_DEVICE_API_VERSION_3_2:
1125        ALOGV("%s: Camera id %d uses HAL3.2 or newer, supports api1/api2 directly",
1126                __FUNCTION__, cameraId);
1127        return OK;
1128      case -1:
1129        ALOGE("%s: Invalid camera id %d", __FUNCTION__, cameraId);
1130        return BAD_VALUE;
1131      default:
1132        ALOGE("%s: Unknown camera device HAL version: %d", __FUNCTION__, deviceVersion);
1133        return INVALID_OPERATION;
1134    }
1135
1136    return OK;
1137}
1138
1139void CameraService::removeClientByRemote(const wp<IBinder>& remoteBinder) {
1140    int callingPid = getCallingPid();
1141    LOG1("CameraService::removeClientByRemote E (pid %d)", callingPid);
1142
1143    // Declare this before the lock to make absolutely sure the
1144    // destructor won't be called with the lock held.
1145    Mutex::Autolock lock(mServiceLock);
1146
1147    int outIndex;
1148    sp<BasicClient> client = findClientUnsafe(remoteBinder, outIndex);
1149
1150    if (client != 0) {
1151        // Found our camera, clear and leave.
1152        LOG1("removeClient: clear camera %d", outIndex);
1153
1154        sp<IBinder> remote = client->getRemote();
1155        if (remote != NULL) {
1156            remote->unlinkToDeath(this);
1157        }
1158
1159        mClient[outIndex].clear();
1160    } else {
1161
1162        sp<ProClient> clientPro = findProClientUnsafe(remoteBinder);
1163
1164        if (clientPro != NULL) {
1165            // Found our camera, clear and leave.
1166            LOG1("removeClient: clear pro %p", clientPro.get());
1167
1168            clientPro->getRemoteCallback()->asBinder()->unlinkToDeath(this);
1169        }
1170    }
1171
1172    LOG1("CameraService::removeClientByRemote X (pid %d)", callingPid);
1173}
1174
1175sp<CameraService::ProClient> CameraService::findProClientUnsafe(
1176                        const wp<IBinder>& cameraCallbacksRemote)
1177{
1178    sp<ProClient> clientPro;
1179
1180    for (int i = 0; i < mNumberOfCameras; ++i) {
1181        Vector<size_t> removeIdx;
1182
1183        for (size_t j = 0; j < mProClientList[i].size(); ++j) {
1184            wp<ProClient> cl = mProClientList[i][j];
1185
1186            sp<ProClient> clStrong = cl.promote();
1187            if (clStrong != NULL && clStrong->getRemote() == cameraCallbacksRemote) {
1188                clientPro = clStrong;
1189                break;
1190            } else if (clStrong == NULL) {
1191                // mark to clean up dead ptr
1192                removeIdx.push(j);
1193            }
1194        }
1195
1196        // remove stale ptrs (in reverse so the indices dont change)
1197        for (ssize_t j = (ssize_t)removeIdx.size() - 1; j >= 0; --j) {
1198            mProClientList[i].removeAt(removeIdx[j]);
1199        }
1200
1201    }
1202
1203    return clientPro;
1204}
1205
1206sp<CameraService::BasicClient> CameraService::findClientUnsafe(
1207                        const wp<IBinder>& cameraClient, int& outIndex) {
1208    sp<BasicClient> client;
1209
1210    for (int i = 0; i < mNumberOfCameras; i++) {
1211
1212        // This happens when we have already disconnected (or this is
1213        // just another unused camera).
1214        if (mClient[i] == 0) continue;
1215
1216        // Promote mClient. It can fail if we are called from this path:
1217        // Client::~Client() -> disconnect() -> removeClientByRemote().
1218        client = mClient[i].promote();
1219
1220        // Clean up stale client entry
1221        if (client == NULL) {
1222            mClient[i].clear();
1223            continue;
1224        }
1225
1226        if (cameraClient == client->getRemote()) {
1227            // Found our camera
1228            outIndex = i;
1229            return client;
1230        }
1231    }
1232
1233    outIndex = -1;
1234    return NULL;
1235}
1236
1237CameraService::BasicClient* CameraService::getClientByIdUnsafe(int cameraId) {
1238    if (cameraId < 0 || cameraId >= mNumberOfCameras) return NULL;
1239    return mClient[cameraId].unsafe_get();
1240}
1241
1242Mutex* CameraService::getClientLockById(int cameraId) {
1243    if (cameraId < 0 || cameraId >= mNumberOfCameras) return NULL;
1244    return &mClientLock[cameraId];
1245}
1246
1247sp<CameraService::BasicClient> CameraService::getClientByRemote(
1248                                const wp<IBinder>& cameraClient) {
1249
1250    // Declare this before the lock to make absolutely sure the
1251    // destructor won't be called with the lock held.
1252    sp<BasicClient> client;
1253
1254    Mutex::Autolock lock(mServiceLock);
1255
1256    int outIndex;
1257    client = findClientUnsafe(cameraClient, outIndex);
1258
1259    return client;
1260}
1261
1262status_t CameraService::onTransact(
1263    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags) {
1264    // Permission checks
1265    switch (code) {
1266        case BnCameraService::CONNECT:
1267        case BnCameraService::CONNECT_PRO:
1268        case BnCameraService::CONNECT_DEVICE:
1269        case BnCameraService::CONNECT_LEGACY:
1270            const int pid = getCallingPid();
1271            const int self_pid = getpid();
1272            if (pid != self_pid) {
1273                // we're called from a different process, do the real check
1274                if (!checkCallingPermission(
1275                        String16("android.permission.CAMERA"))) {
1276                    const int uid = getCallingUid();
1277                    ALOGE("Permission Denial: "
1278                         "can't use the camera pid=%d, uid=%d", pid, uid);
1279                    return PERMISSION_DENIED;
1280                }
1281            }
1282            break;
1283    }
1284
1285    return BnCameraService::onTransact(code, data, reply, flags);
1286}
1287
1288// The reason we need this busy bit is a new CameraService::connect() request
1289// may come in while the previous Client's destructor has not been run or is
1290// still running. If the last strong reference of the previous Client is gone
1291// but the destructor has not been finished, we should not allow the new Client
1292// to be created because we need to wait for the previous Client to tear down
1293// the hardware first.
1294void CameraService::setCameraBusy(int cameraId) {
1295    android_atomic_write(1, &mBusy[cameraId]);
1296
1297    ALOGV("setCameraBusy cameraId=%d", cameraId);
1298}
1299
1300void CameraService::setCameraFree(int cameraId) {
1301    android_atomic_write(0, &mBusy[cameraId]);
1302
1303    ALOGV("setCameraFree cameraId=%d", cameraId);
1304}
1305
1306// We share the media players for shutter and recording sound for all clients.
1307// A reference count is kept to determine when we will actually release the
1308// media players.
1309
1310MediaPlayer* CameraService::newMediaPlayer(const char *file) {
1311    MediaPlayer* mp = new MediaPlayer();
1312    if (mp->setDataSource(NULL /* httpService */, file, NULL) == NO_ERROR) {
1313        mp->setAudioStreamType(AUDIO_STREAM_ENFORCED_AUDIBLE);
1314        mp->prepare();
1315    } else {
1316        ALOGE("Failed to load CameraService sounds: %s", file);
1317        return NULL;
1318    }
1319    return mp;
1320}
1321
1322void CameraService::loadSound() {
1323    Mutex::Autolock lock(mSoundLock);
1324    LOG1("CameraService::loadSound ref=%d", mSoundRef);
1325    if (mSoundRef++) return;
1326
1327    mSoundPlayer[SOUND_SHUTTER] = newMediaPlayer("/system/media/audio/ui/camera_click.ogg");
1328    mSoundPlayer[SOUND_RECORDING] = newMediaPlayer("/system/media/audio/ui/VideoRecord.ogg");
1329}
1330
1331void CameraService::releaseSound() {
1332    Mutex::Autolock lock(mSoundLock);
1333    LOG1("CameraService::releaseSound ref=%d", mSoundRef);
1334    if (--mSoundRef) return;
1335
1336    for (int i = 0; i < NUM_SOUNDS; i++) {
1337        if (mSoundPlayer[i] != 0) {
1338            mSoundPlayer[i]->disconnect();
1339            mSoundPlayer[i].clear();
1340        }
1341    }
1342}
1343
1344void CameraService::playSound(sound_kind kind) {
1345    LOG1("playSound(%d)", kind);
1346    Mutex::Autolock lock(mSoundLock);
1347    sp<MediaPlayer> player = mSoundPlayer[kind];
1348    if (player != 0) {
1349        player->seekTo(0);
1350        player->start();
1351    }
1352}
1353
1354// ----------------------------------------------------------------------------
1355
1356CameraService::Client::Client(const sp<CameraService>& cameraService,
1357        const sp<ICameraClient>& cameraClient,
1358        const String16& clientPackageName,
1359        int cameraId, int cameraFacing,
1360        int clientPid, uid_t clientUid,
1361        int servicePid) :
1362        CameraService::BasicClient(cameraService, cameraClient->asBinder(),
1363                clientPackageName,
1364                cameraId, cameraFacing,
1365                clientPid, clientUid,
1366                servicePid)
1367{
1368    int callingPid = getCallingPid();
1369    LOG1("Client::Client E (pid %d, id %d)", callingPid, cameraId);
1370
1371    mRemoteCallback = cameraClient;
1372
1373    cameraService->setCameraBusy(cameraId);
1374    cameraService->loadSound();
1375
1376    LOG1("Client::Client X (pid %d, id %d)", callingPid, cameraId);
1377}
1378
1379// tear down the client
1380CameraService::Client::~Client() {
1381    ALOGV("~Client");
1382    mDestructionStarted = true;
1383
1384    mCameraService->releaseSound();
1385    // unconditionally disconnect. function is idempotent
1386    Client::disconnect();
1387}
1388
1389CameraService::BasicClient::BasicClient(const sp<CameraService>& cameraService,
1390        const sp<IBinder>& remoteCallback,
1391        const String16& clientPackageName,
1392        int cameraId, int cameraFacing,
1393        int clientPid, uid_t clientUid,
1394        int servicePid):
1395        mClientPackageName(clientPackageName)
1396{
1397    mCameraService = cameraService;
1398    mRemoteBinder = remoteCallback;
1399    mCameraId = cameraId;
1400    mCameraFacing = cameraFacing;
1401    mClientPid = clientPid;
1402    mClientUid = clientUid;
1403    mServicePid = servicePid;
1404    mOpsActive = false;
1405    mDestructionStarted = false;
1406}
1407
1408CameraService::BasicClient::~BasicClient() {
1409    ALOGV("~BasicClient");
1410    mDestructionStarted = true;
1411}
1412
1413void CameraService::BasicClient::disconnect() {
1414    ALOGV("BasicClient::disconnect");
1415    mCameraService->removeClientByRemote(mRemoteBinder);
1416
1417    finishCameraOps();
1418    // client shouldn't be able to call into us anymore
1419    mClientPid = 0;
1420}
1421
1422status_t CameraService::BasicClient::startCameraOps() {
1423    int32_t res;
1424    // Notify app ops that the camera is not available
1425    mOpsCallback = new OpsCallback(this);
1426
1427    {
1428        ALOGV("%s: Start camera ops, package name = %s, client UID = %d",
1429              __FUNCTION__, String8(mClientPackageName).string(), mClientUid);
1430    }
1431
1432    mAppOpsManager.startWatchingMode(AppOpsManager::OP_CAMERA,
1433            mClientPackageName, mOpsCallback);
1434    res = mAppOpsManager.startOp(AppOpsManager::OP_CAMERA,
1435            mClientUid, mClientPackageName);
1436
1437    if (res != AppOpsManager::MODE_ALLOWED) {
1438        ALOGI("Camera %d: Access for \"%s\" has been revoked",
1439                mCameraId, String8(mClientPackageName).string());
1440        return PERMISSION_DENIED;
1441    }
1442
1443    mOpsActive = true;
1444
1445    // Transition device availability listeners from PRESENT -> NOT_AVAILABLE
1446    mCameraService->updateStatus(ICameraServiceListener::STATUS_NOT_AVAILABLE,
1447            mCameraId);
1448
1449    return OK;
1450}
1451
1452status_t CameraService::BasicClient::finishCameraOps() {
1453    // Check if startCameraOps succeeded, and if so, finish the camera op
1454    if (mOpsActive) {
1455        // Notify app ops that the camera is available again
1456        mAppOpsManager.finishOp(AppOpsManager::OP_CAMERA, mClientUid,
1457                mClientPackageName);
1458        mOpsActive = false;
1459
1460        // Notify device availability listeners that this camera is available
1461        // again
1462
1463        StatusVector rejectSourceStates;
1464        rejectSourceStates.push_back(ICameraServiceListener::STATUS_NOT_PRESENT);
1465        rejectSourceStates.push_back(ICameraServiceListener::STATUS_ENUMERATING);
1466
1467        // Transition to PRESENT if the camera is not in either of above 2
1468        // states
1469        mCameraService->updateStatus(ICameraServiceListener::STATUS_PRESENT,
1470                mCameraId,
1471                &rejectSourceStates);
1472
1473    }
1474    // Always stop watching, even if no camera op is active
1475    mAppOpsManager.stopWatchingMode(mOpsCallback);
1476    mOpsCallback.clear();
1477
1478    return OK;
1479}
1480
1481void CameraService::BasicClient::opChanged(int32_t op, const String16& packageName) {
1482    String8 name(packageName);
1483    String8 myName(mClientPackageName);
1484
1485    if (op != AppOpsManager::OP_CAMERA) {
1486        ALOGW("Unexpected app ops notification received: %d", op);
1487        return;
1488    }
1489
1490    int32_t res;
1491    res = mAppOpsManager.checkOp(AppOpsManager::OP_CAMERA,
1492            mClientUid, mClientPackageName);
1493    ALOGV("checkOp returns: %d, %s ", res,
1494            res == AppOpsManager::MODE_ALLOWED ? "ALLOWED" :
1495            res == AppOpsManager::MODE_IGNORED ? "IGNORED" :
1496            res == AppOpsManager::MODE_ERRORED ? "ERRORED" :
1497            "UNKNOWN");
1498
1499    if (res != AppOpsManager::MODE_ALLOWED) {
1500        ALOGI("Camera %d: Access for \"%s\" revoked", mCameraId,
1501                myName.string());
1502        // Reset the client PID to allow server-initiated disconnect,
1503        // and to prevent further calls by client.
1504        mClientPid = getCallingPid();
1505        CaptureResultExtras resultExtras; // a dummy result (invalid)
1506        notifyError(ICameraDeviceCallbacks::ERROR_CAMERA_SERVICE, resultExtras);
1507        disconnect();
1508    }
1509}
1510
1511// ----------------------------------------------------------------------------
1512
1513Mutex* CameraService::Client::getClientLockFromCookie(void* user) {
1514    return gCameraService->getClientLockById((int)(intptr_t) user);
1515}
1516
1517// Provide client pointer for callbacks. Client lock returned from getClientLockFromCookie should
1518// be acquired for this to be safe
1519CameraService::Client* CameraService::Client::getClientFromCookie(void* user) {
1520    BasicClient *basicClient = gCameraService->getClientByIdUnsafe((int)(intptr_t) user);
1521    // OK: only CameraClient calls this, and they already cast anyway.
1522    Client* client = static_cast<Client*>(basicClient);
1523
1524    // This could happen if the Client is in the process of shutting down (the
1525    // last strong reference is gone, but the destructor hasn't finished
1526    // stopping the hardware).
1527    if (client == NULL) return NULL;
1528
1529    // destruction already started, so should not be accessed
1530    if (client->mDestructionStarted) return NULL;
1531
1532    return client;
1533}
1534
1535void CameraService::Client::notifyError(ICameraDeviceCallbacks::CameraErrorCode errorCode,
1536        const CaptureResultExtras& resultExtras) {
1537    mRemoteCallback->notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_RELEASED, 0);
1538}
1539
1540// NOTE: function is idempotent
1541void CameraService::Client::disconnect() {
1542    ALOGV("Client::disconnect");
1543    BasicClient::disconnect();
1544    mCameraService->setCameraFree(mCameraId);
1545}
1546
1547CameraService::Client::OpsCallback::OpsCallback(wp<BasicClient> client):
1548        mClient(client) {
1549}
1550
1551void CameraService::Client::OpsCallback::opChanged(int32_t op,
1552        const String16& packageName) {
1553    sp<BasicClient> client = mClient.promote();
1554    if (client != NULL) {
1555        client->opChanged(op, packageName);
1556    }
1557}
1558
1559// ----------------------------------------------------------------------------
1560//                  IProCamera
1561// ----------------------------------------------------------------------------
1562
1563CameraService::ProClient::ProClient(const sp<CameraService>& cameraService,
1564        const sp<IProCameraCallbacks>& remoteCallback,
1565        const String16& clientPackageName,
1566        int cameraId,
1567        int cameraFacing,
1568        int clientPid,
1569        uid_t clientUid,
1570        int servicePid)
1571        : CameraService::BasicClient(cameraService, remoteCallback->asBinder(),
1572                clientPackageName, cameraId, cameraFacing,
1573                clientPid,  clientUid, servicePid)
1574{
1575    mRemoteCallback = remoteCallback;
1576}
1577
1578CameraService::ProClient::~ProClient() {
1579}
1580
1581void CameraService::ProClient::notifyError(ICameraDeviceCallbacks::CameraErrorCode errorCode,
1582        const CaptureResultExtras& resultExtras) {
1583    mRemoteCallback->notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_RELEASED, 0);
1584}
1585
1586// ----------------------------------------------------------------------------
1587
1588static const int kDumpLockRetries = 50;
1589static const int kDumpLockSleep = 60000;
1590
1591static bool tryLock(Mutex& mutex)
1592{
1593    bool locked = false;
1594    for (int i = 0; i < kDumpLockRetries; ++i) {
1595        if (mutex.tryLock() == NO_ERROR) {
1596            locked = true;
1597            break;
1598        }
1599        usleep(kDumpLockSleep);
1600    }
1601    return locked;
1602}
1603
1604status_t CameraService::dump(int fd, const Vector<String16>& args) {
1605    String8 result;
1606    if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
1607        result.appendFormat("Permission Denial: "
1608                "can't dump CameraService from pid=%d, uid=%d\n",
1609                getCallingPid(),
1610                getCallingUid());
1611        write(fd, result.string(), result.size());
1612    } else {
1613        bool locked = tryLock(mServiceLock);
1614        // failed to lock - CameraService is probably deadlocked
1615        if (!locked) {
1616            result.append("CameraService may be deadlocked\n");
1617            write(fd, result.string(), result.size());
1618        }
1619
1620        bool hasClient = false;
1621        if (!mModule) {
1622            result = String8::format("No camera module available!\n");
1623            write(fd, result.string(), result.size());
1624            if (locked) mServiceLock.unlock();
1625            return NO_ERROR;
1626        }
1627
1628        result = String8::format("Camera module HAL API version: 0x%x\n",
1629                mModule->common.hal_api_version);
1630        result.appendFormat("Camera module API version: 0x%x\n",
1631                mModule->common.module_api_version);
1632        result.appendFormat("Camera module name: %s\n",
1633                mModule->common.name);
1634        result.appendFormat("Camera module author: %s\n",
1635                mModule->common.author);
1636        result.appendFormat("Number of camera devices: %d\n\n", mNumberOfCameras);
1637
1638        sp<VendorTagDescriptor> desc = VendorTagDescriptor::getGlobalVendorTagDescriptor();
1639        if (desc == NULL) {
1640            result.appendFormat("Vendor tags left unimplemented.\n");
1641        } else {
1642            result.appendFormat("Vendor tag definitions:\n");
1643        }
1644
1645        write(fd, result.string(), result.size());
1646
1647        if (desc != NULL) {
1648            desc->dump(fd, /*verbosity*/2, /*indentation*/4);
1649        }
1650
1651        for (int i = 0; i < mNumberOfCameras; i++) {
1652            result = String8::format("Camera %d static information:\n", i);
1653            camera_info info;
1654
1655            status_t rc = mModule->get_camera_info(i, &info);
1656            if (rc != OK) {
1657                result.appendFormat("  Error reading static information!\n");
1658                write(fd, result.string(), result.size());
1659            } else {
1660                result.appendFormat("  Facing: %s\n",
1661                        info.facing == CAMERA_FACING_BACK ? "BACK" : "FRONT");
1662                result.appendFormat("  Orientation: %d\n", info.orientation);
1663                int deviceVersion;
1664                if (mModule->common.module_api_version <
1665                        CAMERA_MODULE_API_VERSION_2_0) {
1666                    deviceVersion = CAMERA_DEVICE_API_VERSION_1_0;
1667                } else {
1668                    deviceVersion = info.device_version;
1669                }
1670                result.appendFormat("  Device version: 0x%x\n", deviceVersion);
1671                if (deviceVersion >= CAMERA_DEVICE_API_VERSION_2_0) {
1672                    result.appendFormat("  Device static metadata:\n");
1673                    write(fd, result.string(), result.size());
1674                    dump_indented_camera_metadata(info.static_camera_characteristics,
1675                            fd, /*verbosity*/2, /*indentation*/4);
1676                } else {
1677                    write(fd, result.string(), result.size());
1678                }
1679            }
1680
1681            sp<BasicClient> client = mClient[i].promote();
1682            if (client == 0) {
1683                result = String8::format("  Device is closed, no client instance\n");
1684                write(fd, result.string(), result.size());
1685                continue;
1686            }
1687            hasClient = true;
1688            result = String8::format("  Device is open. Client instance dump:\n");
1689            write(fd, result.string(), result.size());
1690            client->dump(fd, args);
1691        }
1692        if (!hasClient) {
1693            result = String8::format("\nNo active camera clients yet.\n");
1694            write(fd, result.string(), result.size());
1695        }
1696
1697        if (locked) mServiceLock.unlock();
1698
1699        // Dump camera traces if there were any
1700        write(fd, "\n", 1);
1701        camera3::CameraTraces::dump(fd, args);
1702
1703        // change logging level
1704        int n = args.size();
1705        for (int i = 0; i + 1 < n; i++) {
1706            String16 verboseOption("-v");
1707            if (args[i] == verboseOption) {
1708                String8 levelStr(args[i+1]);
1709                int level = atoi(levelStr.string());
1710                result = String8::format("\nSetting log level to %d.\n", level);
1711                setLogLevel(level);
1712                write(fd, result.string(), result.size());
1713            }
1714        }
1715
1716    }
1717    return NO_ERROR;
1718}
1719
1720/*virtual*/void CameraService::binderDied(
1721    const wp<IBinder> &who) {
1722
1723    /**
1724      * While tempting to promote the wp<IBinder> into a sp,
1725      * it's actually not supported by the binder driver
1726      */
1727
1728    ALOGV("java clients' binder died");
1729
1730    sp<BasicClient> cameraClient = getClientByRemote(who);
1731
1732    if (cameraClient == 0) {
1733        ALOGV("java clients' binder death already cleaned up (normal case)");
1734        return;
1735    }
1736
1737    ALOGW("Disconnecting camera client %p since the binder for it "
1738          "died (this pid %d)", cameraClient.get(), getCallingPid());
1739
1740    cameraClient->disconnect();
1741
1742}
1743
1744void CameraService::updateStatus(ICameraServiceListener::Status status,
1745                                 int32_t cameraId,
1746                                 const StatusVector *rejectSourceStates) {
1747    // do not lock mServiceLock here or can get into a deadlock from
1748    //  connect() -> ProClient::disconnect -> updateStatus
1749    Mutex::Autolock lock(mStatusMutex);
1750
1751    ICameraServiceListener::Status oldStatus = mStatusList[cameraId];
1752
1753    mStatusList[cameraId] = status;
1754
1755    if (oldStatus != status) {
1756        ALOGV("%s: Status has changed for camera ID %d from 0x%x to 0x%x",
1757              __FUNCTION__, cameraId, (uint32_t)oldStatus, (uint32_t)status);
1758
1759        if (oldStatus == ICameraServiceListener::STATUS_NOT_PRESENT &&
1760            (status != ICameraServiceListener::STATUS_PRESENT &&
1761             status != ICameraServiceListener::STATUS_ENUMERATING)) {
1762
1763            ALOGW("%s: From NOT_PRESENT can only transition into PRESENT"
1764                  " or ENUMERATING", __FUNCTION__);
1765            mStatusList[cameraId] = oldStatus;
1766            return;
1767        }
1768
1769        if (rejectSourceStates != NULL) {
1770            const StatusVector &rejectList = *rejectSourceStates;
1771            StatusVector::const_iterator it = rejectList.begin();
1772
1773            /**
1774             * Sometimes we want to conditionally do a transition.
1775             * For example if a client disconnects, we want to go to PRESENT
1776             * only if we weren't already in NOT_PRESENT or ENUMERATING.
1777             */
1778            for (; it != rejectList.end(); ++it) {
1779                if (oldStatus == *it) {
1780                    ALOGV("%s: Rejecting status transition for Camera ID %d, "
1781                          " since the source state was was in one of the bad "
1782                          " states.", __FUNCTION__, cameraId);
1783                    mStatusList[cameraId] = oldStatus;
1784                    return;
1785                }
1786            }
1787        }
1788
1789        /**
1790          * ProClients lose their exclusive lock.
1791          * - Done before the CameraClient can initialize the HAL device,
1792          *   since we want to be able to close it before they get to initialize
1793          */
1794        if (status == ICameraServiceListener::STATUS_NOT_AVAILABLE) {
1795            Vector<wp<ProClient> > proClients(mProClientList[cameraId]);
1796            Vector<wp<ProClient> >::const_iterator it;
1797
1798            for (it = proClients.begin(); it != proClients.end(); ++it) {
1799                sp<ProClient> proCl = it->promote();
1800                if (proCl.get() != NULL) {
1801                    proCl->onExclusiveLockStolen();
1802                }
1803            }
1804        }
1805
1806        Vector<sp<ICameraServiceListener> >::const_iterator it;
1807        for (it = mListenerList.begin(); it != mListenerList.end(); ++it) {
1808            (*it)->onStatusChanged(status, cameraId);
1809        }
1810    }
1811}
1812
1813ICameraServiceListener::Status CameraService::getStatus(int cameraId) const {
1814    if (cameraId < 0 || cameraId >= MAX_CAMERAS) {
1815        ALOGE("%s: Invalid camera ID %d", __FUNCTION__, cameraId);
1816        return ICameraServiceListener::STATUS_UNKNOWN;
1817    }
1818
1819    Mutex::Autolock al(mStatusMutex);
1820    return mStatusList[cameraId];
1821}
1822
1823}; // namespace android
1824