CameraService.cpp revision 5fc9d902510ccd04db80e0bc6aa679a4317a51b2 
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(/*out*/client,
491                                      /*cameraClient*/NULL, // Empty binder callbacks
492                                      cameraId,
493                                      internalPackageName,
494                                      uid,
495                                      pid);
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(
663        /*out*/
664        sp<Client>& client,
665        /*in*/
666        const sp<ICameraClient>& cameraClient,
667        int cameraId,
668        const String16& clientPackageName,
669        int clientUid,
670        int callingPid,
671        int halVersion,
672        bool legacyMode) {
673
674    int facing = -1;
675    int deviceVersion = getDeviceVersion(cameraId, &facing);
676
677    if (halVersion < 0 || halVersion == deviceVersion) {
678        // Default path: HAL version is unspecified by caller, create CameraClient
679        // based on device version reported by the HAL.
680        switch(deviceVersion) {
681          case CAMERA_DEVICE_API_VERSION_1_0:
682            client = new CameraClient(this, cameraClient,
683                    clientPackageName, cameraId,
684                    facing, callingPid, clientUid, getpid(), legacyMode);
685            break;
686          case CAMERA_DEVICE_API_VERSION_2_0:
687          case CAMERA_DEVICE_API_VERSION_2_1:
688          case CAMERA_DEVICE_API_VERSION_3_0:
689          case CAMERA_DEVICE_API_VERSION_3_1:
690          case CAMERA_DEVICE_API_VERSION_3_2:
691            client = new Camera2Client(this, cameraClient,
692                    clientPackageName, cameraId,
693                    facing, callingPid, clientUid, getpid(), legacyMode);
694            break;
695          case -1:
696            ALOGE("Invalid camera id %d", cameraId);
697            return BAD_VALUE;
698          default:
699            ALOGE("Unknown camera device HAL version: %d", deviceVersion);
700            return INVALID_OPERATION;
701        }
702    } else {
703        // A particular HAL version is requested by caller. Create CameraClient
704        // based on the requested HAL version.
705        if (deviceVersion > CAMERA_DEVICE_API_VERSION_1_0 &&
706            halVersion == CAMERA_DEVICE_API_VERSION_1_0) {
707            // Only support higher HAL version device opened as HAL1.0 device.
708            client = new CameraClient(this, cameraClient,
709                    clientPackageName, cameraId,
710                    facing, callingPid, clientUid, getpid(), legacyMode);
711        } else {
712            // Other combinations (e.g. HAL3.x open as HAL2.x) are not supported yet.
713            ALOGE("Invalid camera HAL version %x: HAL %x device can only be"
714                    " opened as HAL %x device", halVersion, deviceVersion,
715                    CAMERA_DEVICE_API_VERSION_1_0);
716            return INVALID_OPERATION;
717        }
718    }
719
720    status_t status = connectFinishUnsafe(client, client->getRemote());
721    if (status != OK) {
722        // this is probably not recoverable.. maybe the client can try again
723        return status;
724    }
725
726    mClient[cameraId] = client;
727    LOG1("CameraService::connect X (id %d, this pid is %d)", cameraId,
728         getpid());
729
730    return OK;
731}
732
733status_t CameraService::connect(
734        const sp<ICameraClient>& cameraClient,
735        int cameraId,
736        const String16& clientPackageName,
737        int clientUid,
738        /*out*/
739        sp<ICamera>& device) {
740
741    String8 clientName8(clientPackageName);
742    int callingPid = getCallingPid();
743
744    LOG1("CameraService::connect E (pid %d \"%s\", id %d)", callingPid,
745            clientName8.string(), cameraId);
746
747    status_t status = validateConnect(cameraId, /*inout*/clientUid);
748    if (status != OK) {
749        return status;
750    }
751
752
753    sp<Client> client;
754    {
755        Mutex::Autolock lock(mServiceLock);
756        sp<BasicClient> clientTmp;
757        if (!canConnectUnsafe(cameraId, clientPackageName,
758                              cameraClient->asBinder(),
759                              /*out*/clientTmp)) {
760            return -EBUSY;
761        } else if (client.get() != NULL) {
762            device = static_cast<Client*>(clientTmp.get());
763            return OK;
764        }
765
766        status = connectHelperLocked(/*out*/client,
767                                     cameraClient,
768                                     cameraId,
769                                     clientPackageName,
770                                     clientUid,
771                                     callingPid);
772        if (status != OK) {
773            return status;
774        }
775
776    }
777    // important: release the mutex here so the client can call back
778    //    into the service from its destructor (can be at the end of the call)
779
780    device = client;
781    return OK;
782}
783
784status_t CameraService::connectLegacy(
785        const sp<ICameraClient>& cameraClient,
786        int cameraId, int halVersion,
787        const String16& clientPackageName,
788        int clientUid,
789        /*out*/
790        sp<ICamera>& device) {
791
792    if (halVersion != CAMERA_HAL_API_VERSION_UNSPECIFIED &&
793            mModule->common.module_api_version < CAMERA_MODULE_API_VERSION_2_3) {
794        /*
795         * Either the HAL version is unspecified in which case this just creates
796         * a camera client selected by the latest device version, or
797         * it's a particular version in which case the HAL must supported
798         * the open_legacy call
799         */
800        ALOGE("%s: camera HAL module version %x doesn't support connecting to legacy HAL devices!",
801                __FUNCTION__, mModule->common.module_api_version);
802        return INVALID_OPERATION;
803    }
804
805    String8 clientName8(clientPackageName);
806    int callingPid = getCallingPid();
807
808    LOG1("CameraService::connect legacy E (pid %d \"%s\", id %d)", callingPid,
809            clientName8.string(), cameraId);
810
811    status_t status = validateConnect(cameraId, /*inout*/clientUid);
812    if (status != OK) {
813        return status;
814    }
815
816    sp<Client> client;
817    {
818        Mutex::Autolock lock(mServiceLock);
819        sp<BasicClient> clientTmp;
820        if (!canConnectUnsafe(cameraId, clientPackageName,
821                              cameraClient->asBinder(),
822                              /*out*/clientTmp)) {
823            return -EBUSY;
824        } else if (client.get() != NULL) {
825            device = static_cast<Client*>(clientTmp.get());
826            return OK;
827        }
828
829        status = connectHelperLocked(/*out*/client,
830                                     cameraClient,
831                                     cameraId,
832                                     clientPackageName,
833                                     clientUid,
834                                     callingPid,
835                                     halVersion,
836                                     /*legacyMode*/true);
837        if (status != OK) {
838            return status;
839        }
840
841    }
842    // important: release the mutex here so the client can call back
843    //    into the service from its destructor (can be at the end of the call)
844
845    device = client;
846    return OK;
847}
848
849status_t CameraService::connectFinishUnsafe(const sp<BasicClient>& client,
850                                            const sp<IBinder>& remoteCallback) {
851    status_t status = client->initialize(mModule);
852    if (status != OK) {
853        ALOGE("%s: Could not initialize client from HAL module.", __FUNCTION__);
854        return status;
855    }
856    if (remoteCallback != NULL) {
857        remoteCallback->linkToDeath(this);
858    }
859
860    return OK;
861}
862
863status_t CameraService::connectPro(
864                                        const sp<IProCameraCallbacks>& cameraCb,
865                                        int cameraId,
866                                        const String16& clientPackageName,
867                                        int clientUid,
868                                        /*out*/
869                                        sp<IProCameraUser>& device)
870{
871    if (cameraCb == 0) {
872        ALOGE("%s: Callback must not be null", __FUNCTION__);
873        return BAD_VALUE;
874    }
875
876    String8 clientName8(clientPackageName);
877    int callingPid = getCallingPid();
878
879    LOG1("CameraService::connectPro E (pid %d \"%s\", id %d)", callingPid,
880            clientName8.string(), cameraId);
881    status_t status = validateConnect(cameraId, /*inout*/clientUid);
882    if (status != OK) {
883        return status;
884    }
885
886    sp<ProClient> client;
887    {
888        Mutex::Autolock lock(mServiceLock);
889        {
890            sp<BasicClient> client;
891            if (!canConnectUnsafe(cameraId, clientPackageName,
892                                  cameraCb->asBinder(),
893                                  /*out*/client)) {
894                return -EBUSY;
895            }
896        }
897
898        int facing = -1;
899        int deviceVersion = getDeviceVersion(cameraId, &facing);
900
901        switch(deviceVersion) {
902          case CAMERA_DEVICE_API_VERSION_1_0:
903            ALOGE("Camera id %d uses HALv1, doesn't support ProCamera",
904                  cameraId);
905            return -EOPNOTSUPP;
906            break;
907          case CAMERA_DEVICE_API_VERSION_2_0:
908          case CAMERA_DEVICE_API_VERSION_2_1:
909          case CAMERA_DEVICE_API_VERSION_3_0:
910          case CAMERA_DEVICE_API_VERSION_3_1:
911          case CAMERA_DEVICE_API_VERSION_3_2:
912            client = new ProCamera2Client(this, cameraCb, clientPackageName,
913                    cameraId, facing, callingPid, clientUid, getpid());
914            break;
915          case -1:
916            ALOGE("Invalid camera id %d", cameraId);
917            return BAD_VALUE;
918          default:
919            ALOGE("Unknown camera device HAL version: %d", deviceVersion);
920            return INVALID_OPERATION;
921        }
922
923        status_t status = connectFinishUnsafe(client, client->getRemote());
924        if (status != OK) {
925            return status;
926        }
927
928        mProClientList[cameraId].push(client);
929
930        LOG1("CameraService::connectPro X (id %d, this pid is %d)", cameraId,
931                getpid());
932    }
933    // important: release the mutex here so the client can call back
934    //    into the service from its destructor (can be at the end of the call)
935    device = client;
936    return OK;
937}
938
939status_t CameraService::connectDevice(
940        const sp<ICameraDeviceCallbacks>& cameraCb,
941        int cameraId,
942        const String16& clientPackageName,
943        int clientUid,
944        /*out*/
945        sp<ICameraDeviceUser>& device)
946{
947
948    String8 clientName8(clientPackageName);
949    int callingPid = getCallingPid();
950
951    LOG1("CameraService::connectDevice E (pid %d \"%s\", id %d)", callingPid,
952            clientName8.string(), cameraId);
953
954    status_t status = validateConnect(cameraId, /*inout*/clientUid);
955    if (status != OK) {
956        return status;
957    }
958
959    sp<CameraDeviceClient> client;
960    {
961        Mutex::Autolock lock(mServiceLock);
962        {
963            sp<BasicClient> client;
964            if (!canConnectUnsafe(cameraId, clientPackageName,
965                                  cameraCb->asBinder(),
966                                  /*out*/client)) {
967                return -EBUSY;
968            }
969        }
970
971        int facing = -1;
972        int deviceVersion = getDeviceVersion(cameraId, &facing);
973
974        switch(deviceVersion) {
975          case CAMERA_DEVICE_API_VERSION_1_0:
976            ALOGW("Camera using old HAL version: %d", deviceVersion);
977            return -EOPNOTSUPP;
978           // TODO: don't allow 2.0  Only allow 2.1 and higher
979          case CAMERA_DEVICE_API_VERSION_2_0:
980          case CAMERA_DEVICE_API_VERSION_2_1:
981          case CAMERA_DEVICE_API_VERSION_3_0:
982          case CAMERA_DEVICE_API_VERSION_3_1:
983          case CAMERA_DEVICE_API_VERSION_3_2:
984            client = new CameraDeviceClient(this, cameraCb, clientPackageName,
985                    cameraId, facing, callingPid, clientUid, getpid());
986            break;
987          case -1:
988            ALOGE("Invalid camera id %d", cameraId);
989            return BAD_VALUE;
990          default:
991            ALOGE("Unknown camera device HAL version: %d", deviceVersion);
992            return INVALID_OPERATION;
993        }
994
995        status_t status = connectFinishUnsafe(client, client->getRemote());
996        if (status != OK) {
997            // this is probably not recoverable.. maybe the client can try again
998            return status;
999        }
1000
1001        LOG1("CameraService::connectDevice X (id %d, this pid is %d)", cameraId,
1002                getpid());
1003
1004        mClient[cameraId] = client;
1005    }
1006    // important: release the mutex here so the client can call back
1007    //    into the service from its destructor (can be at the end of the call)
1008
1009    device = client;
1010    return OK;
1011}
1012
1013
1014status_t CameraService::addListener(
1015                                const sp<ICameraServiceListener>& listener) {
1016    ALOGV("%s: Add listener %p", __FUNCTION__, listener.get());
1017
1018    if (listener == 0) {
1019        ALOGE("%s: Listener must not be null", __FUNCTION__);
1020        return BAD_VALUE;
1021    }
1022
1023    Mutex::Autolock lock(mServiceLock);
1024
1025    Vector<sp<ICameraServiceListener> >::iterator it, end;
1026    for (it = mListenerList.begin(); it != mListenerList.end(); ++it) {
1027        if ((*it)->asBinder() == listener->asBinder()) {
1028            ALOGW("%s: Tried to add listener %p which was already subscribed",
1029                  __FUNCTION__, listener.get());
1030            return ALREADY_EXISTS;
1031        }
1032    }
1033
1034    mListenerList.push_back(listener);
1035
1036    /* Immediately signal current status to this listener only */
1037    {
1038        Mutex::Autolock m(mStatusMutex) ;
1039        int numCams = getNumberOfCameras();
1040        for (int i = 0; i < numCams; ++i) {
1041            listener->onStatusChanged(mStatusList[i], i);
1042        }
1043    }
1044
1045    return OK;
1046}
1047status_t CameraService::removeListener(
1048                                const sp<ICameraServiceListener>& listener) {
1049    ALOGV("%s: Remove listener %p", __FUNCTION__, listener.get());
1050
1051    if (listener == 0) {
1052        ALOGE("%s: Listener must not be null", __FUNCTION__);
1053        return BAD_VALUE;
1054    }
1055
1056    Mutex::Autolock lock(mServiceLock);
1057
1058    Vector<sp<ICameraServiceListener> >::iterator it;
1059    for (it = mListenerList.begin(); it != mListenerList.end(); ++it) {
1060        if ((*it)->asBinder() == listener->asBinder()) {
1061            mListenerList.erase(it);
1062            return OK;
1063        }
1064    }
1065
1066    ALOGW("%s: Tried to remove a listener %p which was not subscribed",
1067          __FUNCTION__, listener.get());
1068
1069    return BAD_VALUE;
1070}
1071
1072status_t CameraService::getLegacyParameters(
1073            int cameraId,
1074            /*out*/
1075            String16* parameters) {
1076    ALOGV("%s: for camera ID = %d", __FUNCTION__, cameraId);
1077
1078    if (parameters == NULL) {
1079        ALOGE("%s: parameters must not be null", __FUNCTION__);
1080        return BAD_VALUE;
1081    }
1082
1083    status_t ret = 0;
1084
1085    CameraParameters shimParams;
1086    if ((ret = getLegacyParametersLazy(cameraId, /*out*/&shimParams)) != OK) {
1087        // Error logged by caller
1088        return ret;
1089    }
1090
1091    String8 shimParamsString8 = shimParams.flatten();
1092    String16 shimParamsString16 = String16(shimParamsString8);
1093
1094    *parameters = shimParamsString16;
1095
1096    return OK;
1097}
1098
1099status_t CameraService::supportsCameraApi(int cameraId, int apiVersion) {
1100    ALOGV("%s: for camera ID = %d", __FUNCTION__, cameraId);
1101
1102    switch (apiVersion) {
1103        case API_VERSION_1:
1104        case API_VERSION_2:
1105            break;
1106        default:
1107            ALOGE("%s: Bad API version %d", __FUNCTION__, apiVersion);
1108            return BAD_VALUE;
1109    }
1110
1111    int facing = -1;
1112    int deviceVersion = getDeviceVersion(cameraId, &facing);
1113
1114    switch(deviceVersion) {
1115      case CAMERA_DEVICE_API_VERSION_1_0:
1116      case CAMERA_DEVICE_API_VERSION_2_0:
1117      case CAMERA_DEVICE_API_VERSION_2_1:
1118      case CAMERA_DEVICE_API_VERSION_3_0:
1119      case CAMERA_DEVICE_API_VERSION_3_1:
1120        if (apiVersion == API_VERSION_2) {
1121            ALOGV("%s: Camera id %d uses HAL prior to HAL3.2, doesn't support api2 without shim",
1122                    __FUNCTION__, cameraId);
1123            return -EOPNOTSUPP;
1124        } else { // if (apiVersion == API_VERSION_1) {
1125            ALOGV("%s: Camera id %d uses older HAL before 3.2, but api1 is always supported",
1126                    __FUNCTION__, cameraId);
1127            return OK;
1128        }
1129      case CAMERA_DEVICE_API_VERSION_3_2:
1130        ALOGV("%s: Camera id %d uses HAL3.2 or newer, supports api1/api2 directly",
1131                __FUNCTION__, cameraId);
1132        return OK;
1133      case -1:
1134        ALOGE("%s: Invalid camera id %d", __FUNCTION__, cameraId);
1135        return BAD_VALUE;
1136      default:
1137        ALOGE("%s: Unknown camera device HAL version: %d", __FUNCTION__, deviceVersion);
1138        return INVALID_OPERATION;
1139    }
1140
1141    return OK;
1142}
1143
1144void CameraService::removeClientByRemote(const wp<IBinder>& remoteBinder) {
1145    int callingPid = getCallingPid();
1146    LOG1("CameraService::removeClientByRemote E (pid %d)", callingPid);
1147
1148    // Declare this before the lock to make absolutely sure the
1149    // destructor won't be called with the lock held.
1150    Mutex::Autolock lock(mServiceLock);
1151
1152    int outIndex;
1153    sp<BasicClient> client = findClientUnsafe(remoteBinder, outIndex);
1154
1155    if (client != 0) {
1156        // Found our camera, clear and leave.
1157        LOG1("removeClient: clear camera %d", outIndex);
1158
1159        sp<IBinder> remote = client->getRemote();
1160        if (remote != NULL) {
1161            remote->unlinkToDeath(this);
1162        }
1163
1164        mClient[outIndex].clear();
1165    } else {
1166
1167        sp<ProClient> clientPro = findProClientUnsafe(remoteBinder);
1168
1169        if (clientPro != NULL) {
1170            // Found our camera, clear and leave.
1171            LOG1("removeClient: clear pro %p", clientPro.get());
1172
1173            clientPro->getRemoteCallback()->asBinder()->unlinkToDeath(this);
1174        }
1175    }
1176
1177    LOG1("CameraService::removeClientByRemote X (pid %d)", callingPid);
1178}
1179
1180sp<CameraService::ProClient> CameraService::findProClientUnsafe(
1181                        const wp<IBinder>& cameraCallbacksRemote)
1182{
1183    sp<ProClient> clientPro;
1184
1185    for (int i = 0; i < mNumberOfCameras; ++i) {
1186        Vector<size_t> removeIdx;
1187
1188        for (size_t j = 0; j < mProClientList[i].size(); ++j) {
1189            wp<ProClient> cl = mProClientList[i][j];
1190
1191            sp<ProClient> clStrong = cl.promote();
1192            if (clStrong != NULL && clStrong->getRemote() == cameraCallbacksRemote) {
1193                clientPro = clStrong;
1194                break;
1195            } else if (clStrong == NULL) {
1196                // mark to clean up dead ptr
1197                removeIdx.push(j);
1198            }
1199        }
1200
1201        // remove stale ptrs (in reverse so the indices dont change)
1202        for (ssize_t j = (ssize_t)removeIdx.size() - 1; j >= 0; --j) {
1203            mProClientList[i].removeAt(removeIdx[j]);
1204        }
1205
1206    }
1207
1208    return clientPro;
1209}
1210
1211sp<CameraService::BasicClient> CameraService::findClientUnsafe(
1212                        const wp<IBinder>& cameraClient, int& outIndex) {
1213    sp<BasicClient> client;
1214
1215    for (int i = 0; i < mNumberOfCameras; i++) {
1216
1217        // This happens when we have already disconnected (or this is
1218        // just another unused camera).
1219        if (mClient[i] == 0) continue;
1220
1221        // Promote mClient. It can fail if we are called from this path:
1222        // Client::~Client() -> disconnect() -> removeClientByRemote().
1223        client = mClient[i].promote();
1224
1225        // Clean up stale client entry
1226        if (client == NULL) {
1227            mClient[i].clear();
1228            continue;
1229        }
1230
1231        if (cameraClient == client->getRemote()) {
1232            // Found our camera
1233            outIndex = i;
1234            return client;
1235        }
1236    }
1237
1238    outIndex = -1;
1239    return NULL;
1240}
1241
1242CameraService::BasicClient* CameraService::getClientByIdUnsafe(int cameraId) {
1243    if (cameraId < 0 || cameraId >= mNumberOfCameras) return NULL;
1244    return mClient[cameraId].unsafe_get();
1245}
1246
1247Mutex* CameraService::getClientLockById(int cameraId) {
1248    if (cameraId < 0 || cameraId >= mNumberOfCameras) return NULL;
1249    return &mClientLock[cameraId];
1250}
1251
1252sp<CameraService::BasicClient> CameraService::getClientByRemote(
1253                                const wp<IBinder>& cameraClient) {
1254
1255    // Declare this before the lock to make absolutely sure the
1256    // destructor won't be called with the lock held.
1257    sp<BasicClient> client;
1258
1259    Mutex::Autolock lock(mServiceLock);
1260
1261    int outIndex;
1262    client = findClientUnsafe(cameraClient, outIndex);
1263
1264    return client;
1265}
1266
1267status_t CameraService::onTransact(
1268    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags) {
1269    // Permission checks
1270    switch (code) {
1271        case BnCameraService::CONNECT:
1272        case BnCameraService::CONNECT_PRO:
1273        case BnCameraService::CONNECT_DEVICE:
1274        case BnCameraService::CONNECT_LEGACY:
1275            const int pid = getCallingPid();
1276            const int self_pid = getpid();
1277            if (pid != self_pid) {
1278                // we're called from a different process, do the real check
1279                if (!checkCallingPermission(
1280                        String16("android.permission.CAMERA"))) {
1281                    const int uid = getCallingUid();
1282                    ALOGE("Permission Denial: "
1283                         "can't use the camera pid=%d, uid=%d", pid, uid);
1284                    return PERMISSION_DENIED;
1285                }
1286            }
1287            break;
1288    }
1289
1290    return BnCameraService::onTransact(code, data, reply, flags);
1291}
1292
1293// The reason we need this busy bit is a new CameraService::connect() request
1294// may come in while the previous Client's destructor has not been run or is
1295// still running. If the last strong reference of the previous Client is gone
1296// but the destructor has not been finished, we should not allow the new Client
1297// to be created because we need to wait for the previous Client to tear down
1298// the hardware first.
1299void CameraService::setCameraBusy(int cameraId) {
1300    android_atomic_write(1, &mBusy[cameraId]);
1301
1302    ALOGV("setCameraBusy cameraId=%d", cameraId);
1303}
1304
1305void CameraService::setCameraFree(int cameraId) {
1306    android_atomic_write(0, &mBusy[cameraId]);
1307
1308    ALOGV("setCameraFree cameraId=%d", cameraId);
1309}
1310
1311// We share the media players for shutter and recording sound for all clients.
1312// A reference count is kept to determine when we will actually release the
1313// media players.
1314
1315MediaPlayer* CameraService::newMediaPlayer(const char *file) {
1316    MediaPlayer* mp = new MediaPlayer();
1317    if (mp->setDataSource(NULL /* httpService */, file, NULL) == NO_ERROR) {
1318        mp->setAudioStreamType(AUDIO_STREAM_ENFORCED_AUDIBLE);
1319        mp->prepare();
1320    } else {
1321        ALOGE("Failed to load CameraService sounds: %s", file);
1322        return NULL;
1323    }
1324    return mp;
1325}
1326
1327void CameraService::loadSound() {
1328    Mutex::Autolock lock(mSoundLock);
1329    LOG1("CameraService::loadSound ref=%d", mSoundRef);
1330    if (mSoundRef++) return;
1331
1332    mSoundPlayer[SOUND_SHUTTER] = newMediaPlayer("/system/media/audio/ui/camera_click.ogg");
1333    mSoundPlayer[SOUND_RECORDING] = newMediaPlayer("/system/media/audio/ui/VideoRecord.ogg");
1334}
1335
1336void CameraService::releaseSound() {
1337    Mutex::Autolock lock(mSoundLock);
1338    LOG1("CameraService::releaseSound ref=%d", mSoundRef);
1339    if (--mSoundRef) return;
1340
1341    for (int i = 0; i < NUM_SOUNDS; i++) {
1342        if (mSoundPlayer[i] != 0) {
1343            mSoundPlayer[i]->disconnect();
1344            mSoundPlayer[i].clear();
1345        }
1346    }
1347}
1348
1349void CameraService::playSound(sound_kind kind) {
1350    LOG1("playSound(%d)", kind);
1351    Mutex::Autolock lock(mSoundLock);
1352    sp<MediaPlayer> player = mSoundPlayer[kind];
1353    if (player != 0) {
1354        player->seekTo(0);
1355        player->start();
1356    }
1357}
1358
1359// ----------------------------------------------------------------------------
1360
1361CameraService::Client::Client(const sp<CameraService>& cameraService,
1362        const sp<ICameraClient>& cameraClient,
1363        const String16& clientPackageName,
1364        int cameraId, int cameraFacing,
1365        int clientPid, uid_t clientUid,
1366        int servicePid) :
1367        CameraService::BasicClient(cameraService, cameraClient->asBinder(),
1368                clientPackageName,
1369                cameraId, cameraFacing,
1370                clientPid, clientUid,
1371                servicePid)
1372{
1373    int callingPid = getCallingPid();
1374    LOG1("Client::Client E (pid %d, id %d)", callingPid, cameraId);
1375
1376    mRemoteCallback = cameraClient;
1377
1378    cameraService->setCameraBusy(cameraId);
1379    cameraService->loadSound();
1380
1381    LOG1("Client::Client X (pid %d, id %d)", callingPid, cameraId);
1382}
1383
1384// tear down the client
1385CameraService::Client::~Client() {
1386    ALOGV("~Client");
1387    mDestructionStarted = true;
1388
1389    mCameraService->releaseSound();
1390    // unconditionally disconnect. function is idempotent
1391    Client::disconnect();
1392}
1393
1394CameraService::BasicClient::BasicClient(const sp<CameraService>& cameraService,
1395        const sp<IBinder>& remoteCallback,
1396        const String16& clientPackageName,
1397        int cameraId, int cameraFacing,
1398        int clientPid, uid_t clientUid,
1399        int servicePid):
1400        mClientPackageName(clientPackageName)
1401{
1402    mCameraService = cameraService;
1403    mRemoteBinder = remoteCallback;
1404    mCameraId = cameraId;
1405    mCameraFacing = cameraFacing;
1406    mClientPid = clientPid;
1407    mClientUid = clientUid;
1408    mServicePid = servicePid;
1409    mOpsActive = false;
1410    mDestructionStarted = false;
1411}
1412
1413CameraService::BasicClient::~BasicClient() {
1414    ALOGV("~BasicClient");
1415    mDestructionStarted = true;
1416}
1417
1418void CameraService::BasicClient::disconnect() {
1419    ALOGV("BasicClient::disconnect");
1420    mCameraService->removeClientByRemote(mRemoteBinder);
1421
1422    finishCameraOps();
1423    // client shouldn't be able to call into us anymore
1424    mClientPid = 0;
1425}
1426
1427status_t CameraService::BasicClient::startCameraOps() {
1428    int32_t res;
1429    // Notify app ops that the camera is not available
1430    mOpsCallback = new OpsCallback(this);
1431
1432    {
1433        ALOGV("%s: Start camera ops, package name = %s, client UID = %d",
1434              __FUNCTION__, String8(mClientPackageName).string(), mClientUid);
1435    }
1436
1437    mAppOpsManager.startWatchingMode(AppOpsManager::OP_CAMERA,
1438            mClientPackageName, mOpsCallback);
1439    res = mAppOpsManager.startOp(AppOpsManager::OP_CAMERA,
1440            mClientUid, mClientPackageName);
1441
1442    if (res != AppOpsManager::MODE_ALLOWED) {
1443        ALOGI("Camera %d: Access for \"%s\" has been revoked",
1444                mCameraId, String8(mClientPackageName).string());
1445        return PERMISSION_DENIED;
1446    }
1447
1448    mOpsActive = true;
1449
1450    // Transition device availability listeners from PRESENT -> NOT_AVAILABLE
1451    mCameraService->updateStatus(ICameraServiceListener::STATUS_NOT_AVAILABLE,
1452            mCameraId);
1453
1454    return OK;
1455}
1456
1457status_t CameraService::BasicClient::finishCameraOps() {
1458    // Check if startCameraOps succeeded, and if so, finish the camera op
1459    if (mOpsActive) {
1460        // Notify app ops that the camera is available again
1461        mAppOpsManager.finishOp(AppOpsManager::OP_CAMERA, mClientUid,
1462                mClientPackageName);
1463        mOpsActive = false;
1464
1465        // Notify device availability listeners that this camera is available
1466        // again
1467
1468        StatusVector rejectSourceStates;
1469        rejectSourceStates.push_back(ICameraServiceListener::STATUS_NOT_PRESENT);
1470        rejectSourceStates.push_back(ICameraServiceListener::STATUS_ENUMERATING);
1471
1472        // Transition to PRESENT if the camera is not in either of above 2
1473        // states
1474        mCameraService->updateStatus(ICameraServiceListener::STATUS_PRESENT,
1475                mCameraId,
1476                &rejectSourceStates);
1477
1478    }
1479    // Always stop watching, even if no camera op is active
1480    mAppOpsManager.stopWatchingMode(mOpsCallback);
1481    mOpsCallback.clear();
1482
1483    return OK;
1484}
1485
1486void CameraService::BasicClient::opChanged(int32_t op, const String16& packageName) {
1487    String8 name(packageName);
1488    String8 myName(mClientPackageName);
1489
1490    if (op != AppOpsManager::OP_CAMERA) {
1491        ALOGW("Unexpected app ops notification received: %d", op);
1492        return;
1493    }
1494
1495    int32_t res;
1496    res = mAppOpsManager.checkOp(AppOpsManager::OP_CAMERA,
1497            mClientUid, mClientPackageName);
1498    ALOGV("checkOp returns: %d, %s ", res,
1499            res == AppOpsManager::MODE_ALLOWED ? "ALLOWED" :
1500            res == AppOpsManager::MODE_IGNORED ? "IGNORED" :
1501            res == AppOpsManager::MODE_ERRORED ? "ERRORED" :
1502            "UNKNOWN");
1503
1504    if (res != AppOpsManager::MODE_ALLOWED) {
1505        ALOGI("Camera %d: Access for \"%s\" revoked", mCameraId,
1506                myName.string());
1507        // Reset the client PID to allow server-initiated disconnect,
1508        // and to prevent further calls by client.
1509        mClientPid = getCallingPid();
1510        CaptureResultExtras resultExtras; // a dummy result (invalid)
1511        notifyError(ICameraDeviceCallbacks::ERROR_CAMERA_SERVICE, resultExtras);
1512        disconnect();
1513    }
1514}
1515
1516// ----------------------------------------------------------------------------
1517
1518Mutex* CameraService::Client::getClientLockFromCookie(void* user) {
1519    return gCameraService->getClientLockById((int)(intptr_t) user);
1520}
1521
1522// Provide client pointer for callbacks. Client lock returned from getClientLockFromCookie should
1523// be acquired for this to be safe
1524CameraService::Client* CameraService::Client::getClientFromCookie(void* user) {
1525    BasicClient *basicClient = gCameraService->getClientByIdUnsafe((int)(intptr_t) user);
1526    // OK: only CameraClient calls this, and they already cast anyway.
1527    Client* client = static_cast<Client*>(basicClient);
1528
1529    // This could happen if the Client is in the process of shutting down (the
1530    // last strong reference is gone, but the destructor hasn't finished
1531    // stopping the hardware).
1532    if (client == NULL) return NULL;
1533
1534    // destruction already started, so should not be accessed
1535    if (client->mDestructionStarted) return NULL;
1536
1537    return client;
1538}
1539
1540void CameraService::Client::notifyError(ICameraDeviceCallbacks::CameraErrorCode errorCode,
1541        const CaptureResultExtras& resultExtras) {
1542    mRemoteCallback->notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_RELEASED, 0);
1543}
1544
1545// NOTE: function is idempotent
1546void CameraService::Client::disconnect() {
1547    ALOGV("Client::disconnect");
1548    BasicClient::disconnect();
1549    mCameraService->setCameraFree(mCameraId);
1550}
1551
1552CameraService::Client::OpsCallback::OpsCallback(wp<BasicClient> client):
1553        mClient(client) {
1554}
1555
1556void CameraService::Client::OpsCallback::opChanged(int32_t op,
1557        const String16& packageName) {
1558    sp<BasicClient> client = mClient.promote();
1559    if (client != NULL) {
1560        client->opChanged(op, packageName);
1561    }
1562}
1563
1564// ----------------------------------------------------------------------------
1565//                  IProCamera
1566// ----------------------------------------------------------------------------
1567
1568CameraService::ProClient::ProClient(const sp<CameraService>& cameraService,
1569        const sp<IProCameraCallbacks>& remoteCallback,
1570        const String16& clientPackageName,
1571        int cameraId,
1572        int cameraFacing,
1573        int clientPid,
1574        uid_t clientUid,
1575        int servicePid)
1576        : CameraService::BasicClient(cameraService, remoteCallback->asBinder(),
1577                clientPackageName, cameraId, cameraFacing,
1578                clientPid,  clientUid, servicePid)
1579{
1580    mRemoteCallback = remoteCallback;
1581}
1582
1583CameraService::ProClient::~ProClient() {
1584}
1585
1586void CameraService::ProClient::notifyError(ICameraDeviceCallbacks::CameraErrorCode errorCode,
1587        const CaptureResultExtras& resultExtras) {
1588    mRemoteCallback->notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_RELEASED, 0);
1589}
1590
1591// ----------------------------------------------------------------------------
1592
1593static const int kDumpLockRetries = 50;
1594static const int kDumpLockSleep = 60000;
1595
1596static bool tryLock(Mutex& mutex)
1597{
1598    bool locked = false;
1599    for (int i = 0; i < kDumpLockRetries; ++i) {
1600        if (mutex.tryLock() == NO_ERROR) {
1601            locked = true;
1602            break;
1603        }
1604        usleep(kDumpLockSleep);
1605    }
1606    return locked;
1607}
1608
1609status_t CameraService::dump(int fd, const Vector<String16>& args) {
1610    String8 result;
1611    if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
1612        result.appendFormat("Permission Denial: "
1613                "can't dump CameraService from pid=%d, uid=%d\n",
1614                getCallingPid(),
1615                getCallingUid());
1616        write(fd, result.string(), result.size());
1617    } else {
1618        bool locked = tryLock(mServiceLock);
1619        // failed to lock - CameraService is probably deadlocked
1620        if (!locked) {
1621            result.append("CameraService may be deadlocked\n");
1622            write(fd, result.string(), result.size());
1623        }
1624
1625        bool hasClient = false;
1626        if (!mModule) {
1627            result = String8::format("No camera module available!\n");
1628            write(fd, result.string(), result.size());
1629            if (locked) mServiceLock.unlock();
1630            return NO_ERROR;
1631        }
1632
1633        result = String8::format("Camera module HAL API version: 0x%x\n",
1634                mModule->common.hal_api_version);
1635        result.appendFormat("Camera module API version: 0x%x\n",
1636                mModule->common.module_api_version);
1637        result.appendFormat("Camera module name: %s\n",
1638                mModule->common.name);
1639        result.appendFormat("Camera module author: %s\n",
1640                mModule->common.author);
1641        result.appendFormat("Number of camera devices: %d\n\n", mNumberOfCameras);
1642
1643        sp<VendorTagDescriptor> desc = VendorTagDescriptor::getGlobalVendorTagDescriptor();
1644        if (desc == NULL) {
1645            result.appendFormat("Vendor tags left unimplemented.\n");
1646        } else {
1647            result.appendFormat("Vendor tag definitions:\n");
1648        }
1649
1650        write(fd, result.string(), result.size());
1651
1652        if (desc != NULL) {
1653            desc->dump(fd, /*verbosity*/2, /*indentation*/4);
1654        }
1655
1656        for (int i = 0; i < mNumberOfCameras; i++) {
1657            result = String8::format("Camera %d static information:\n", i);
1658            camera_info info;
1659
1660            status_t rc = mModule->get_camera_info(i, &info);
1661            if (rc != OK) {
1662                result.appendFormat("  Error reading static information!\n");
1663                write(fd, result.string(), result.size());
1664            } else {
1665                result.appendFormat("  Facing: %s\n",
1666                        info.facing == CAMERA_FACING_BACK ? "BACK" : "FRONT");
1667                result.appendFormat("  Orientation: %d\n", info.orientation);
1668                int deviceVersion;
1669                if (mModule->common.module_api_version <
1670                        CAMERA_MODULE_API_VERSION_2_0) {
1671                    deviceVersion = CAMERA_DEVICE_API_VERSION_1_0;
1672                } else {
1673                    deviceVersion = info.device_version;
1674                }
1675                result.appendFormat("  Device version: 0x%x\n", deviceVersion);
1676                if (deviceVersion >= CAMERA_DEVICE_API_VERSION_2_0) {
1677                    result.appendFormat("  Device static metadata:\n");
1678                    write(fd, result.string(), result.size());
1679                    dump_indented_camera_metadata(info.static_camera_characteristics,
1680                            fd, /*verbosity*/2, /*indentation*/4);
1681                } else {
1682                    write(fd, result.string(), result.size());
1683                }
1684            }
1685
1686            sp<BasicClient> client = mClient[i].promote();
1687            if (client == 0) {
1688                result = String8::format("  Device is closed, no client instance\n");
1689                write(fd, result.string(), result.size());
1690                continue;
1691            }
1692            hasClient = true;
1693            result = String8::format("  Device is open. Client instance dump:\n");
1694            write(fd, result.string(), result.size());
1695            client->dump(fd, args);
1696        }
1697        if (!hasClient) {
1698            result = String8::format("\nNo active camera clients yet.\n");
1699            write(fd, result.string(), result.size());
1700        }
1701
1702        if (locked) mServiceLock.unlock();
1703
1704        // Dump camera traces if there were any
1705        write(fd, "\n", 1);
1706        camera3::CameraTraces::dump(fd, args);
1707
1708        // change logging level
1709        int n = args.size();
1710        for (int i = 0; i + 1 < n; i++) {
1711            String16 verboseOption("-v");
1712            if (args[i] == verboseOption) {
1713                String8 levelStr(args[i+1]);
1714                int level = atoi(levelStr.string());
1715                result = String8::format("\nSetting log level to %d.\n", level);
1716                setLogLevel(level);
1717                write(fd, result.string(), result.size());
1718            }
1719        }
1720
1721    }
1722    return NO_ERROR;
1723}
1724
1725/*virtual*/void CameraService::binderDied(
1726    const wp<IBinder> &who) {
1727
1728    /**
1729      * While tempting to promote the wp<IBinder> into a sp,
1730      * it's actually not supported by the binder driver
1731      */
1732
1733    ALOGV("java clients' binder died");
1734
1735    sp<BasicClient> cameraClient = getClientByRemote(who);
1736
1737    if (cameraClient == 0) {
1738        ALOGV("java clients' binder death already cleaned up (normal case)");
1739        return;
1740    }
1741
1742    ALOGW("Disconnecting camera client %p since the binder for it "
1743          "died (this pid %d)", cameraClient.get(), getCallingPid());
1744
1745    cameraClient->disconnect();
1746
1747}
1748
1749void CameraService::updateStatus(ICameraServiceListener::Status status,
1750                                 int32_t cameraId,
1751                                 const StatusVector *rejectSourceStates) {
1752    // do not lock mServiceLock here or can get into a deadlock from
1753    //  connect() -> ProClient::disconnect -> updateStatus
1754    Mutex::Autolock lock(mStatusMutex);
1755
1756    ICameraServiceListener::Status oldStatus = mStatusList[cameraId];
1757
1758    mStatusList[cameraId] = status;
1759
1760    if (oldStatus != status) {
1761        ALOGV("%s: Status has changed for camera ID %d from 0x%x to 0x%x",
1762              __FUNCTION__, cameraId, (uint32_t)oldStatus, (uint32_t)status);
1763
1764        if (oldStatus == ICameraServiceListener::STATUS_NOT_PRESENT &&
1765            (status != ICameraServiceListener::STATUS_PRESENT &&
1766             status != ICameraServiceListener::STATUS_ENUMERATING)) {
1767
1768            ALOGW("%s: From NOT_PRESENT can only transition into PRESENT"
1769                  " or ENUMERATING", __FUNCTION__);
1770            mStatusList[cameraId] = oldStatus;
1771            return;
1772        }
1773
1774        if (rejectSourceStates != NULL) {
1775            const StatusVector &rejectList = *rejectSourceStates;
1776            StatusVector::const_iterator it = rejectList.begin();
1777
1778            /**
1779             * Sometimes we want to conditionally do a transition.
1780             * For example if a client disconnects, we want to go to PRESENT
1781             * only if we weren't already in NOT_PRESENT or ENUMERATING.
1782             */
1783            for (; it != rejectList.end(); ++it) {
1784                if (oldStatus == *it) {
1785                    ALOGV("%s: Rejecting status transition for Camera ID %d, "
1786                          " since the source state was was in one of the bad "
1787                          " states.", __FUNCTION__, cameraId);
1788                    mStatusList[cameraId] = oldStatus;
1789                    return;
1790                }
1791            }
1792        }
1793
1794        /**
1795          * ProClients lose their exclusive lock.
1796          * - Done before the CameraClient can initialize the HAL device,
1797          *   since we want to be able to close it before they get to initialize
1798          */
1799        if (status == ICameraServiceListener::STATUS_NOT_AVAILABLE) {
1800            Vector<wp<ProClient> > proClients(mProClientList[cameraId]);
1801            Vector<wp<ProClient> >::const_iterator it;
1802
1803            for (it = proClients.begin(); it != proClients.end(); ++it) {
1804                sp<ProClient> proCl = it->promote();
1805                if (proCl.get() != NULL) {
1806                    proCl->onExclusiveLockStolen();
1807                }
1808            }
1809        }
1810
1811        Vector<sp<ICameraServiceListener> >::const_iterator it;
1812        for (it = mListenerList.begin(); it != mListenerList.end(); ++it) {
1813            (*it)->onStatusChanged(status, cameraId);
1814        }
1815    }
1816}
1817
1818ICameraServiceListener::Status CameraService::getStatus(int cameraId) const {
1819    if (cameraId < 0 || cameraId >= MAX_CAMERAS) {
1820        ALOGE("%s: Invalid camera ID %d", __FUNCTION__, cameraId);
1821        return ICameraServiceListener::STATUS_UNKNOWN;
1822    }
1823
1824    Mutex::Autolock al(mStatusMutex);
1825    return mStatusList[cameraId];
1826}
1827
1828}; // namespace android
1829