CameraService.cpp revision cd8fce8fbe0f515e53a0ea0f50b739cf42ee57a4 
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 = mModule->get_camera_info(cameraId, &info);
239    cameraInfo->facing = info.facing;
240    cameraInfo->orientation = info.orientation;
241    return rc;
242}
243
244
245status_t CameraService::generateShimMetadata(int cameraId, /*out*/CameraMetadata* cameraInfo) {
246    status_t ret = OK;
247    struct CameraInfo info;
248    if ((ret = getCameraInfo(cameraId, &info)) != OK) {
249        return ret;
250    }
251
252    CameraMetadata shimInfo;
253    int32_t orientation = static_cast<int32_t>(info.orientation);
254    if ((ret = shimInfo.update(ANDROID_SENSOR_ORIENTATION, &orientation, 1)) != OK) {
255        return ret;
256    }
257
258    uint8_t facing = (info.facing == CAMERA_FACING_FRONT) ?
259            ANDROID_LENS_FACING_FRONT : ANDROID_LENS_FACING_BACK;
260    if ((ret = shimInfo.update(ANDROID_LENS_FACING, &facing, 1)) != OK) {
261        return ret;
262    }
263
264    CameraParameters shimParams;
265    if ((ret = getLegacyParametersLazy(cameraId, /*out*/&shimParams)) != OK) {
266        // Error logged by callee
267        return ret;
268    }
269
270    Vector<Size> sizes;
271    Vector<Size> jpegSizes;
272    Vector<int32_t> formats;
273    const char* supportedPreviewFormats;
274    {
275        shimParams.getSupportedPreviewSizes(/*out*/sizes);
276        shimParams.getSupportedPreviewFormats(/*out*/formats);
277        shimParams.getSupportedPictureSizes(/*out*/jpegSizes);
278    }
279
280    // Always include IMPLEMENTATION_DEFINED
281    formats.add(HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED);
282
283    const size_t INTS_PER_CONFIG = 4;
284
285    // Build available stream configurations metadata
286    size_t streamConfigSize = (sizes.size() * formats.size() + jpegSizes.size()) * INTS_PER_CONFIG;
287
288    Vector<int32_t> streamConfigs;
289    streamConfigs.setCapacity(streamConfigSize);
290
291    for (size_t i = 0; i < formats.size(); ++i) {
292        for (size_t j = 0; j < sizes.size(); ++j) {
293            streamConfigs.add(formats[i]);
294            streamConfigs.add(sizes[j].width);
295            streamConfigs.add(sizes[j].height);
296            streamConfigs.add(ANDROID_SCALER_AVAILABLE_STREAM_CONFIGURATIONS_OUTPUT);
297        }
298    }
299
300    for (size_t i = 0; i < jpegSizes.size(); ++i) {
301        streamConfigs.add(HAL_PIXEL_FORMAT_BLOB);
302        streamConfigs.add(jpegSizes[i].width);
303        streamConfigs.add(jpegSizes[i].height);
304        streamConfigs.add(ANDROID_SCALER_AVAILABLE_STREAM_CONFIGURATIONS_OUTPUT);
305    }
306
307    if ((ret = shimInfo.update(ANDROID_SCALER_AVAILABLE_STREAM_CONFIGURATIONS,
308            streamConfigs.array(), streamConfigSize)) != OK) {
309        return ret;
310    }
311
312    int64_t fakeMinFrames[0];
313    // TODO: Fixme, don't fake min frame durations.
314    if ((ret = shimInfo.update(ANDROID_SCALER_AVAILABLE_MIN_FRAME_DURATIONS,
315            fakeMinFrames, 0)) != OK) {
316        return ret;
317    }
318
319    int64_t fakeStalls[0];
320    // TODO: Fixme, don't fake stall durations.
321    if ((ret = shimInfo.update(ANDROID_SCALER_AVAILABLE_STALL_DURATIONS,
322            fakeStalls, 0)) != OK) {
323        return ret;
324    }
325
326    *cameraInfo = shimInfo;
327    return OK;
328}
329
330status_t CameraService::getCameraCharacteristics(int cameraId,
331                                                CameraMetadata* cameraInfo) {
332    if (!cameraInfo) {
333        ALOGE("%s: cameraInfo is NULL", __FUNCTION__);
334        return BAD_VALUE;
335    }
336
337    if (!mModule) {
338        ALOGE("%s: camera hardware module doesn't exist", __FUNCTION__);
339        return -ENODEV;
340    }
341
342    if (cameraId < 0 || cameraId >= mNumberOfCameras) {
343        ALOGE("%s: Invalid camera id: %d", __FUNCTION__, cameraId);
344        return BAD_VALUE;
345    }
346
347    int facing;
348    status_t ret = OK;
349    if (mModule->common.module_api_version < CAMERA_MODULE_API_VERSION_2_0 ||
350            getDeviceVersion(cameraId, &facing) <= CAMERA_DEVICE_API_VERSION_2_1 ) {
351        /**
352         * Backwards compatibility mode for old HALs:
353         * - Convert CameraInfo into static CameraMetadata properties.
354         * - Retrieve cached CameraParameters for this camera.  If none exist,
355         *   attempt to open CameraClient and retrieve the CameraParameters.
356         * - Convert cached CameraParameters into static CameraMetadata
357         *   properties.
358         */
359        ALOGI("%s: Switching to HAL1 shim implementation...", __FUNCTION__);
360
361        if ((ret = generateShimMetadata(cameraId, cameraInfo)) != OK) {
362            return ret;
363        }
364
365    } else {
366        /**
367         * Normal HAL 2.1+ codepath.
368         */
369        struct camera_info info;
370        ret = mModule->get_camera_info(cameraId, &info);
371        *cameraInfo = info.static_camera_characteristics;
372    }
373
374    return ret;
375}
376
377status_t CameraService::getCameraVendorTagDescriptor(/*out*/sp<VendorTagDescriptor>& desc) {
378    if (!mModule) {
379        ALOGE("%s: camera hardware module doesn't exist", __FUNCTION__);
380        return -ENODEV;
381    }
382
383    desc = VendorTagDescriptor::getGlobalVendorTagDescriptor();
384    return OK;
385}
386
387int CameraService::getDeviceVersion(int cameraId, int* facing) {
388    struct camera_info info;
389    if (mModule->get_camera_info(cameraId, &info) != OK) {
390        return -1;
391    }
392
393    int deviceVersion;
394    if (mModule->common.module_api_version >= CAMERA_MODULE_API_VERSION_2_0) {
395        deviceVersion = info.device_version;
396    } else {
397        deviceVersion = CAMERA_DEVICE_API_VERSION_1_0;
398    }
399
400    if (facing) {
401        *facing = info.facing;
402    }
403
404    return deviceVersion;
405}
406
407bool CameraService::isValidCameraId(int cameraId) {
408    int facing;
409    int deviceVersion = getDeviceVersion(cameraId, &facing);
410
411    switch(deviceVersion) {
412      case CAMERA_DEVICE_API_VERSION_1_0:
413      case CAMERA_DEVICE_API_VERSION_2_0:
414      case CAMERA_DEVICE_API_VERSION_2_1:
415      case CAMERA_DEVICE_API_VERSION_3_0:
416      case CAMERA_DEVICE_API_VERSION_3_1:
417      case CAMERA_DEVICE_API_VERSION_3_2:
418        return true;
419      default:
420        return false;
421    }
422
423    return false;
424}
425
426bool CameraService::setUpVendorTags() {
427    vendor_tag_ops_t vOps = vendor_tag_ops_t();
428
429    // Check if vendor operations have been implemented
430    if (mModule->get_vendor_tag_ops == NULL) {
431        ALOGI("%s: No vendor tags defined for this device.", __FUNCTION__);
432        return false;
433    }
434
435    ATRACE_BEGIN("camera3->get_metadata_vendor_tag_ops");
436    mModule->get_vendor_tag_ops(&vOps);
437    ATRACE_END();
438
439    // Ensure all vendor operations are present
440    if (vOps.get_tag_count == NULL || vOps.get_all_tags == NULL ||
441            vOps.get_section_name == NULL || vOps.get_tag_name == NULL ||
442            vOps.get_tag_type == NULL) {
443        ALOGE("%s: Vendor tag operations not fully defined. Ignoring definitions."
444               , __FUNCTION__);
445        return false;
446    }
447
448    // Read all vendor tag definitions into a descriptor
449    sp<VendorTagDescriptor> desc;
450    status_t res;
451    if ((res = VendorTagDescriptor::createDescriptorFromOps(&vOps, /*out*/desc))
452            != OK) {
453        ALOGE("%s: Could not generate descriptor from vendor tag operations,"
454              "received error %s (%d). Camera clients will not be able to use"
455              "vendor tags", __FUNCTION__, strerror(res), res);
456        return false;
457    }
458
459    // Set the global descriptor to use with camera metadata
460    VendorTagDescriptor::setAsGlobalVendorTagDescriptor(desc);
461    return true;
462}
463
464status_t CameraService::initializeShimMetadata(int cameraId) {
465    int pid = getCallingPid();
466    int uid = getCallingUid();
467    status_t ret = validateConnect(cameraId, uid);
468    if (ret != OK) {
469        // Error already logged by callee
470        return ret;
471    }
472
473    bool needsNewClient = false;
474    sp<Client> client;
475
476    String16 internalPackageName("media");
477    {   // Scope for service lock
478        Mutex::Autolock lock(mServiceLock);
479        if (mClient[cameraId] != NULL) {
480            client = static_cast<Client*>(mClient[cameraId].promote().get());
481        }
482        if (client == NULL) {
483            needsNewClient = true;
484            ret = connectHelperLocked(/*cameraClient*/NULL, // Empty binder callbacks
485                                      cameraId,
486                                      internalPackageName,
487                                      uid,
488                                      pid,
489                                      client);
490
491            if (ret != OK) {
492                // Error already logged by callee
493                return ret;
494            }
495        }
496
497        if (client == NULL) {
498            ALOGE("%s: Could not connect to client camera device.", __FUNCTION__);
499            return BAD_VALUE;
500        }
501
502        String8 rawParams = client->getParameters();
503        CameraParameters params(rawParams);
504        mShimParams.add(cameraId, params);
505    }
506
507    // Close client if one was opened solely for this call
508    if (needsNewClient) {
509        client->disconnect();
510    }
511    return OK;
512}
513
514status_t CameraService::getLegacyParametersLazy(int cameraId,
515        /*out*/
516        CameraParameters* parameters) {
517
518    ALOGV("%s: for cameraId: %d", __FUNCTION__, cameraId);
519
520    status_t ret = 0;
521
522    if (parameters == NULL) {
523        ALOGE("%s: parameters must not be null", __FUNCTION__);
524        return BAD_VALUE;
525    }
526
527    ssize_t index = -1;
528    {   // Scope for service lock
529        Mutex::Autolock lock(mServiceLock);
530        index = mShimParams.indexOfKey(cameraId);
531        // Release service lock so initializeShimMetadata can be called correctly.
532
533        if (index >= 0) {
534            *parameters = mShimParams[index];
535        }
536    }
537
538    if (index < 0) {
539        int64_t token = IPCThreadState::self()->clearCallingIdentity();
540        ret = initializeShimMetadata(cameraId);
541        IPCThreadState::self()->restoreCallingIdentity(token);
542        if (ret != OK) {
543            // Error already logged by callee
544            return ret;
545        }
546
547        {   // Scope for service lock
548            Mutex::Autolock lock(mServiceLock);
549            index = mShimParams.indexOfKey(cameraId);
550
551            LOG_ALWAYS_FATAL_IF(index < 0, "index should have been initialized");
552
553            *parameters = mShimParams[index];
554        }
555    }
556
557    return OK;
558}
559
560status_t CameraService::validateConnect(int cameraId,
561                                    /*inout*/
562                                    int& clientUid) const {
563
564    int callingPid = getCallingPid();
565
566    if (clientUid == USE_CALLING_UID) {
567        clientUid = getCallingUid();
568    } else {
569        // We only trust our own process to forward client UIDs
570        if (callingPid != getpid()) {
571            ALOGE("CameraService::connect X (pid %d) rejected (don't trust clientUid)",
572                    callingPid);
573            return PERMISSION_DENIED;
574        }
575    }
576
577    if (!mModule) {
578        ALOGE("Camera HAL module not loaded");
579        return -ENODEV;
580    }
581
582    if (cameraId < 0 || cameraId >= mNumberOfCameras) {
583        ALOGE("CameraService::connect X (pid %d) rejected (invalid cameraId %d).",
584            callingPid, cameraId);
585        return -ENODEV;
586    }
587
588    char value[PROPERTY_VALUE_MAX];
589    property_get("sys.secpolicy.camera.disabled", value, "0");
590    if (strcmp(value, "1") == 0) {
591        // Camera is disabled by DevicePolicyManager.
592        ALOGI("Camera is disabled. connect X (pid %d) rejected", callingPid);
593        return -EACCES;
594    }
595
596    ICameraServiceListener::Status currentStatus = getStatus(cameraId);
597    if (currentStatus == ICameraServiceListener::STATUS_NOT_PRESENT) {
598        ALOGI("Camera is not plugged in,"
599               " connect X (pid %d) rejected", callingPid);
600        return -ENODEV;
601    } else if (currentStatus == ICameraServiceListener::STATUS_ENUMERATING) {
602        ALOGI("Camera is enumerating,"
603               " connect X (pid %d) rejected", callingPid);
604        return -EBUSY;
605    }
606    // Else don't check for STATUS_NOT_AVAILABLE.
607    //  -- It's done implicitly in canConnectUnsafe /w the mBusy array
608
609    return OK;
610}
611
612bool CameraService::canConnectUnsafe(int cameraId,
613                                     const String16& clientPackageName,
614                                     const sp<IBinder>& remoteCallback,
615                                     sp<BasicClient> &client) {
616    String8 clientName8(clientPackageName);
617    int callingPid = getCallingPid();
618
619    if (mClient[cameraId] != 0) {
620        client = mClient[cameraId].promote();
621        if (client != 0) {
622            if (remoteCallback == client->getRemote()) {
623                LOG1("CameraService::connect X (pid %d) (the same client)",
624                     callingPid);
625                return true;
626            } else {
627                // TODOSC: need to support 1 regular client,
628                // multiple shared clients here
629                ALOGW("CameraService::connect X (pid %d) rejected"
630                      " (existing client).", callingPid);
631                return false;
632            }
633        }
634        mClient[cameraId].clear();
635    }
636
637    /*
638    mBusy is set to false as the last step of the Client destructor,
639    after which it is guaranteed that the Client destructor has finished (
640    including any inherited destructors)
641
642    We only need this for a Client subclasses since we don't allow
643    multiple Clents to be opened concurrently, but multiple BasicClient
644    would be fine
645    */
646    if (mBusy[cameraId]) {
647        ALOGW("CameraService::connect X (pid %d, \"%s\") rejected"
648                " (camera %d is still busy).", callingPid,
649                clientName8.string(), cameraId);
650        return false;
651    }
652
653    return true;
654}
655
656status_t CameraService::connectHelperLocked(const sp<ICameraClient>& cameraClient,
657                                      int cameraId,
658                                      const String16& clientPackageName,
659                                      int clientUid,
660                                      int callingPid,
661                                      /*out*/
662                                      sp<Client>& client,
663                                      int halVersion) {
664
665    int facing = -1;
666    int deviceVersion = getDeviceVersion(cameraId, &facing);
667
668    // If there are other non-exclusive users of the camera,
669    //  this will tear them down before we can reuse the camera
670    if (isValidCameraId(cameraId)) {
671        // transition from PRESENT -> NOT_AVAILABLE
672        updateStatus(ICameraServiceListener::STATUS_NOT_AVAILABLE,
673                     cameraId);
674    }
675
676    if (halVersion < 0 || halVersion == deviceVersion) {
677        // Default path: HAL version is unspecified by caller, create CameraClient
678        // based on device version reported by the HAL.
679        switch(deviceVersion) {
680          case CAMERA_DEVICE_API_VERSION_1_0:
681            client = new CameraClient(this, cameraClient,
682                    clientPackageName, cameraId,
683                    facing, callingPid, clientUid, getpid());
684            break;
685          case CAMERA_DEVICE_API_VERSION_2_0:
686          case CAMERA_DEVICE_API_VERSION_2_1:
687          case CAMERA_DEVICE_API_VERSION_3_0:
688          case CAMERA_DEVICE_API_VERSION_3_1:
689          case CAMERA_DEVICE_API_VERSION_3_2:
690            client = new Camera2Client(this, cameraClient,
691                    clientPackageName, cameraId,
692                    facing, callingPid, clientUid, getpid());
693            break;
694          case -1:
695            ALOGE("Invalid camera id %d", cameraId);
696            return BAD_VALUE;
697          default:
698            ALOGE("Unknown camera device HAL version: %d", deviceVersion);
699            return INVALID_OPERATION;
700        }
701    } else {
702        // A particular HAL version is requested by caller. Create CameraClient
703        // based on the requested HAL version.
704        if (deviceVersion > CAMERA_DEVICE_API_VERSION_1_0 &&
705            halVersion == CAMERA_DEVICE_API_VERSION_1_0) {
706            // Only support higher HAL version device opened as HAL1.0 device.
707            client = new CameraClient(this, cameraClient,
708                    clientPackageName, cameraId,
709                    facing, callingPid, clientUid, getpid());
710        } else {
711            // Other combinations (e.g. HAL3.x open as HAL2.x) are not supported yet.
712            ALOGE("Invalid camera HAL version %x: HAL %x device can only be"
713                    " opened as HAL %x device", halVersion, deviceVersion,
714                    CAMERA_DEVICE_API_VERSION_1_0);
715            return INVALID_OPERATION;
716        }
717    }
718
719    status_t status = connectFinishUnsafe(client, client->getRemote());
720    if (status != OK) {
721        // this is probably not recoverable.. maybe the client can try again
722        // OK: we can only get here if we were originally in PRESENT state
723        updateStatus(ICameraServiceListener::STATUS_PRESENT, cameraId);
724        return status;
725    }
726
727    mClient[cameraId] = client;
728    LOG1("CameraService::connect X (id %d, this pid is %d)", cameraId,
729         getpid());
730
731    return OK;
732}
733
734status_t CameraService::connect(
735        const sp<ICameraClient>& cameraClient,
736        int cameraId,
737        const String16& clientPackageName,
738        int clientUid,
739        /*out*/
740        sp<ICamera>& device) {
741
742    String8 clientName8(clientPackageName);
743    int callingPid = getCallingPid();
744
745    LOG1("CameraService::connect E (pid %d \"%s\", id %d)", callingPid,
746            clientName8.string(), cameraId);
747
748    status_t status = validateConnect(cameraId, /*inout*/clientUid);
749    if (status != OK) {
750        return status;
751    }
752
753
754    sp<Client> client;
755    {
756        Mutex::Autolock lock(mServiceLock);
757        sp<BasicClient> clientTmp;
758        if (!canConnectUnsafe(cameraId, clientPackageName,
759                              cameraClient->asBinder(),
760                              /*out*/clientTmp)) {
761            return -EBUSY;
762        } else if (client.get() != NULL) {
763            device = static_cast<Client*>(clientTmp.get());
764            return OK;
765        }
766
767        status = connectHelperLocked(cameraClient,
768                                     cameraId,
769                                     clientPackageName,
770                                     clientUid,
771                                     callingPid,
772                                     client);
773        if (status != OK) {
774            return status;
775        }
776
777    }
778    // important: release the mutex here so the client can call back
779    //    into the service from its destructor (can be at the end of the call)
780
781    device = client;
782    return OK;
783}
784
785status_t CameraService::connectLegacy(
786        const sp<ICameraClient>& cameraClient,
787        int cameraId, int halVersion,
788        const String16& clientPackageName,
789        int clientUid,
790        /*out*/
791        sp<ICamera>& device) {
792
793    if (halVersion != CAMERA_HAL_API_VERSION_UNSPECIFIED &&
794            mModule->common.module_api_version < CAMERA_MODULE_API_VERSION_2_3) {
795        /*
796         * Either the HAL version is unspecified in which case this just creates
797         * a camera client selected by the latest device version, or
798         * it's a particular version in which case the HAL must supported
799         * the open_legacy call
800         */
801        ALOGE("%s: camera HAL module version %x doesn't support connecting to legacy HAL devices!",
802                __FUNCTION__, mModule->common.module_api_version);
803        return INVALID_OPERATION;
804    }
805
806    String8 clientName8(clientPackageName);
807    int callingPid = getCallingPid();
808
809    LOG1("CameraService::connect legacy E (pid %d \"%s\", id %d)", callingPid,
810            clientName8.string(), cameraId);
811
812    status_t status = validateConnect(cameraId, /*inout*/clientUid);
813    if (status != OK) {
814        return status;
815    }
816
817    sp<Client> client;
818    {
819        Mutex::Autolock lock(mServiceLock);
820        sp<BasicClient> clientTmp;
821        if (!canConnectUnsafe(cameraId, clientPackageName,
822                              cameraClient->asBinder(),
823                              /*out*/clientTmp)) {
824            return -EBUSY;
825        } else if (client.get() != NULL) {
826            device = static_cast<Client*>(clientTmp.get());
827            return OK;
828        }
829
830        status = connectHelperLocked(cameraClient,
831                                     cameraId,
832                                     clientPackageName,
833                                     clientUid,
834                                     callingPid,
835                                     client,
836                                     halVersion);
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        return status;
854    }
855    if (remoteCallback != NULL) {
856        remoteCallback->linkToDeath(this);
857    }
858
859    return OK;
860}
861
862status_t CameraService::connectPro(
863                                        const sp<IProCameraCallbacks>& cameraCb,
864                                        int cameraId,
865                                        const String16& clientPackageName,
866                                        int clientUid,
867                                        /*out*/
868                                        sp<IProCameraUser>& device)
869{
870    if (cameraCb == 0) {
871        ALOGE("%s: Callback must not be null", __FUNCTION__);
872        return BAD_VALUE;
873    }
874
875    String8 clientName8(clientPackageName);
876    int callingPid = getCallingPid();
877
878    LOG1("CameraService::connectPro E (pid %d \"%s\", id %d)", callingPid,
879            clientName8.string(), cameraId);
880    status_t status = validateConnect(cameraId, /*inout*/clientUid);
881    if (status != OK) {
882        return status;
883    }
884
885    sp<ProClient> client;
886    {
887        Mutex::Autolock lock(mServiceLock);
888        {
889            sp<BasicClient> client;
890            if (!canConnectUnsafe(cameraId, clientPackageName,
891                                  cameraCb->asBinder(),
892                                  /*out*/client)) {
893                return -EBUSY;
894            }
895        }
896
897        int facing = -1;
898        int deviceVersion = getDeviceVersion(cameraId, &facing);
899
900        switch(deviceVersion) {
901          case CAMERA_DEVICE_API_VERSION_1_0:
902            ALOGE("Camera id %d uses HALv1, doesn't support ProCamera",
903                  cameraId);
904            return -EOPNOTSUPP;
905            break;
906          case CAMERA_DEVICE_API_VERSION_2_0:
907          case CAMERA_DEVICE_API_VERSION_2_1:
908          case CAMERA_DEVICE_API_VERSION_3_0:
909          case CAMERA_DEVICE_API_VERSION_3_1:
910          case CAMERA_DEVICE_API_VERSION_3_2:
911            client = new ProCamera2Client(this, cameraCb, clientPackageName,
912                    cameraId, facing, callingPid, clientUid, getpid());
913            break;
914          case -1:
915            ALOGE("Invalid camera id %d", cameraId);
916            return BAD_VALUE;
917          default:
918            ALOGE("Unknown camera device HAL version: %d", deviceVersion);
919            return INVALID_OPERATION;
920        }
921
922        status_t status = connectFinishUnsafe(client, client->getRemote());
923        if (status != OK) {
924            return status;
925        }
926
927        mProClientList[cameraId].push(client);
928
929        LOG1("CameraService::connectPro X (id %d, this pid is %d)", cameraId,
930                getpid());
931    }
932    // important: release the mutex here so the client can call back
933    //    into the service from its destructor (can be at the end of the call)
934    device = client;
935    return OK;
936}
937
938status_t CameraService::connectDevice(
939        const sp<ICameraDeviceCallbacks>& cameraCb,
940        int cameraId,
941        const String16& clientPackageName,
942        int clientUid,
943        /*out*/
944        sp<ICameraDeviceUser>& device)
945{
946
947    String8 clientName8(clientPackageName);
948    int callingPid = getCallingPid();
949
950    LOG1("CameraService::connectDevice E (pid %d \"%s\", id %d)", callingPid,
951            clientName8.string(), cameraId);
952
953    status_t status = validateConnect(cameraId, /*inout*/clientUid);
954    if (status != OK) {
955        return status;
956    }
957
958    sp<CameraDeviceClient> client;
959    {
960        Mutex::Autolock lock(mServiceLock);
961        {
962            sp<BasicClient> client;
963            if (!canConnectUnsafe(cameraId, clientPackageName,
964                                  cameraCb->asBinder(),
965                                  /*out*/client)) {
966                return -EBUSY;
967            }
968        }
969
970        int facing = -1;
971        int deviceVersion = getDeviceVersion(cameraId, &facing);
972
973        // If there are other non-exclusive users of the camera,
974        //  this will tear them down before we can reuse the camera
975        if (isValidCameraId(cameraId)) {
976            // transition from PRESENT -> NOT_AVAILABLE
977            updateStatus(ICameraServiceListener::STATUS_NOT_AVAILABLE,
978                         cameraId);
979        }
980
981        switch(deviceVersion) {
982          case CAMERA_DEVICE_API_VERSION_1_0:
983            ALOGW("Camera using old HAL version: %d", deviceVersion);
984            return -EOPNOTSUPP;
985           // TODO: don't allow 2.0  Only allow 2.1 and higher
986          case CAMERA_DEVICE_API_VERSION_2_0:
987          case CAMERA_DEVICE_API_VERSION_2_1:
988          case CAMERA_DEVICE_API_VERSION_3_0:
989          case CAMERA_DEVICE_API_VERSION_3_1:
990          case CAMERA_DEVICE_API_VERSION_3_2:
991            client = new CameraDeviceClient(this, cameraCb, clientPackageName,
992                    cameraId, facing, callingPid, clientUid, getpid());
993            break;
994          case -1:
995            ALOGE("Invalid camera id %d", cameraId);
996            return BAD_VALUE;
997          default:
998            ALOGE("Unknown camera device HAL version: %d", deviceVersion);
999            return INVALID_OPERATION;
1000        }
1001
1002        status_t status = connectFinishUnsafe(client, client->getRemote());
1003        if (status != OK) {
1004            // this is probably not recoverable.. maybe the client can try again
1005            // OK: we can only get here if we were originally in PRESENT state
1006            updateStatus(ICameraServiceListener::STATUS_PRESENT, cameraId);
1007            return status;
1008        }
1009
1010        LOG1("CameraService::connectDevice X (id %d, this pid is %d)", cameraId,
1011                getpid());
1012
1013        mClient[cameraId] = client;
1014    }
1015    // important: release the mutex here so the client can call back
1016    //    into the service from its destructor (can be at the end of the call)
1017
1018    device = client;
1019    return OK;
1020}
1021
1022
1023status_t CameraService::addListener(
1024                                const sp<ICameraServiceListener>& listener) {
1025    ALOGV("%s: Add listener %p", __FUNCTION__, listener.get());
1026
1027    if (listener == 0) {
1028        ALOGE("%s: Listener must not be null", __FUNCTION__);
1029        return BAD_VALUE;
1030    }
1031
1032    Mutex::Autolock lock(mServiceLock);
1033
1034    Vector<sp<ICameraServiceListener> >::iterator it, end;
1035    for (it = mListenerList.begin(); it != mListenerList.end(); ++it) {
1036        if ((*it)->asBinder() == listener->asBinder()) {
1037            ALOGW("%s: Tried to add listener %p which was already subscribed",
1038                  __FUNCTION__, listener.get());
1039            return ALREADY_EXISTS;
1040        }
1041    }
1042
1043    mListenerList.push_back(listener);
1044
1045    /* Immediately signal current status to this listener only */
1046    {
1047        Mutex::Autolock m(mStatusMutex) ;
1048        int numCams = getNumberOfCameras();
1049        for (int i = 0; i < numCams; ++i) {
1050            listener->onStatusChanged(mStatusList[i], i);
1051        }
1052    }
1053
1054    return OK;
1055}
1056status_t CameraService::removeListener(
1057                                const sp<ICameraServiceListener>& listener) {
1058    ALOGV("%s: Remove listener %p", __FUNCTION__, listener.get());
1059
1060    if (listener == 0) {
1061        ALOGE("%s: Listener must not be null", __FUNCTION__);
1062        return BAD_VALUE;
1063    }
1064
1065    Mutex::Autolock lock(mServiceLock);
1066
1067    Vector<sp<ICameraServiceListener> >::iterator it;
1068    for (it = mListenerList.begin(); it != mListenerList.end(); ++it) {
1069        if ((*it)->asBinder() == listener->asBinder()) {
1070            mListenerList.erase(it);
1071            return OK;
1072        }
1073    }
1074
1075    ALOGW("%s: Tried to remove a listener %p which was not subscribed",
1076          __FUNCTION__, listener.get());
1077
1078    return BAD_VALUE;
1079}
1080
1081status_t CameraService::getLegacyParameters(
1082            int cameraId,
1083            /*out*/
1084            String16* parameters) {
1085    ALOGV("%s: for camera ID = %d", __FUNCTION__, cameraId);
1086
1087    if (parameters == NULL) {
1088        ALOGE("%s: parameters must not be null", __FUNCTION__);
1089        return BAD_VALUE;
1090    }
1091
1092    status_t ret = 0;
1093
1094    CameraParameters shimParams;
1095    if ((ret = getLegacyParametersLazy(cameraId, /*out*/&shimParams)) != OK) {
1096        // Error logged by caller
1097        return ret;
1098    }
1099
1100    String8 shimParamsString8 = shimParams.flatten();
1101    String16 shimParamsString16 = String16(shimParamsString8);
1102
1103    *parameters = shimParamsString16;
1104
1105    return OK;
1106}
1107
1108status_t CameraService::supportsCameraApi(int cameraId, int apiVersion) {
1109    ALOGV("%s: for camera ID = %d", __FUNCTION__, cameraId);
1110
1111    switch (apiVersion) {
1112        case API_VERSION_1:
1113        case API_VERSION_2:
1114            break;
1115        default:
1116            ALOGE("%s: Bad API version %d", __FUNCTION__, apiVersion);
1117            return BAD_VALUE;
1118    }
1119
1120    int facing = -1;
1121    int deviceVersion = getDeviceVersion(cameraId, &facing);
1122
1123    switch(deviceVersion) {
1124      case CAMERA_DEVICE_API_VERSION_1_0:
1125      case CAMERA_DEVICE_API_VERSION_2_0:
1126      case CAMERA_DEVICE_API_VERSION_2_1:
1127      case CAMERA_DEVICE_API_VERSION_3_0:
1128      case CAMERA_DEVICE_API_VERSION_3_1:
1129        if (apiVersion == API_VERSION_2) {
1130            ALOGV("%s: Camera id %d uses HAL prior to HAL3.2, doesn't support api2 without shim",
1131                    __FUNCTION__, cameraId);
1132            return -EOPNOTSUPP;
1133        } else { // if (apiVersion == API_VERSION_1) {
1134            ALOGV("%s: Camera id %d uses older HAL before 3.2, but api1 is always supported",
1135                    __FUNCTION__, cameraId);
1136            return OK;
1137        }
1138      case CAMERA_DEVICE_API_VERSION_3_2:
1139        ALOGV("%s: Camera id %d uses HAL3.2 or newer, supports api1/api2 directly",
1140                __FUNCTION__, cameraId);
1141        return OK;
1142      case -1:
1143        ALOGE("%s: Invalid camera id %d", __FUNCTION__, cameraId);
1144        return BAD_VALUE;
1145      default:
1146        ALOGE("%s: Unknown camera device HAL version: %d", __FUNCTION__, deviceVersion);
1147        return INVALID_OPERATION;
1148    }
1149
1150    return OK;
1151}
1152
1153void CameraService::removeClientByRemote(const wp<IBinder>& remoteBinder) {
1154    int callingPid = getCallingPid();
1155    LOG1("CameraService::removeClientByRemote E (pid %d)", callingPid);
1156
1157    // Declare this before the lock to make absolutely sure the
1158    // destructor won't be called with the lock held.
1159    Mutex::Autolock lock(mServiceLock);
1160
1161    int outIndex;
1162    sp<BasicClient> client = findClientUnsafe(remoteBinder, outIndex);
1163
1164    if (client != 0) {
1165        // Found our camera, clear and leave.
1166        LOG1("removeClient: clear camera %d", outIndex);
1167
1168        sp<IBinder> remote = client->getRemote();
1169        if (remote != NULL) {
1170            remote->unlinkToDeath(this);
1171        }
1172
1173        mClient[outIndex].clear();
1174    } else {
1175
1176        sp<ProClient> clientPro = findProClientUnsafe(remoteBinder);
1177
1178        if (clientPro != NULL) {
1179            // Found our camera, clear and leave.
1180            LOG1("removeClient: clear pro %p", clientPro.get());
1181
1182            clientPro->getRemoteCallback()->asBinder()->unlinkToDeath(this);
1183        }
1184    }
1185
1186    LOG1("CameraService::removeClientByRemote X (pid %d)", callingPid);
1187}
1188
1189sp<CameraService::ProClient> CameraService::findProClientUnsafe(
1190                        const wp<IBinder>& cameraCallbacksRemote)
1191{
1192    sp<ProClient> clientPro;
1193
1194    for (int i = 0; i < mNumberOfCameras; ++i) {
1195        Vector<size_t> removeIdx;
1196
1197        for (size_t j = 0; j < mProClientList[i].size(); ++j) {
1198            wp<ProClient> cl = mProClientList[i][j];
1199
1200            sp<ProClient> clStrong = cl.promote();
1201            if (clStrong != NULL && clStrong->getRemote() == cameraCallbacksRemote) {
1202                clientPro = clStrong;
1203                break;
1204            } else if (clStrong == NULL) {
1205                // mark to clean up dead ptr
1206                removeIdx.push(j);
1207            }
1208        }
1209
1210        // remove stale ptrs (in reverse so the indices dont change)
1211        for (ssize_t j = (ssize_t)removeIdx.size() - 1; j >= 0; --j) {
1212            mProClientList[i].removeAt(removeIdx[j]);
1213        }
1214
1215    }
1216
1217    return clientPro;
1218}
1219
1220sp<CameraService::BasicClient> CameraService::findClientUnsafe(
1221                        const wp<IBinder>& cameraClient, int& outIndex) {
1222    sp<BasicClient> client;
1223
1224    for (int i = 0; i < mNumberOfCameras; i++) {
1225
1226        // This happens when we have already disconnected (or this is
1227        // just another unused camera).
1228        if (mClient[i] == 0) continue;
1229
1230        // Promote mClient. It can fail if we are called from this path:
1231        // Client::~Client() -> disconnect() -> removeClientByRemote().
1232        client = mClient[i].promote();
1233
1234        // Clean up stale client entry
1235        if (client == NULL) {
1236            mClient[i].clear();
1237            continue;
1238        }
1239
1240        if (cameraClient == client->getRemote()) {
1241            // Found our camera
1242            outIndex = i;
1243            return client;
1244        }
1245    }
1246
1247    outIndex = -1;
1248    return NULL;
1249}
1250
1251CameraService::BasicClient* CameraService::getClientByIdUnsafe(int cameraId) {
1252    if (cameraId < 0 || cameraId >= mNumberOfCameras) return NULL;
1253    return mClient[cameraId].unsafe_get();
1254}
1255
1256Mutex* CameraService::getClientLockById(int cameraId) {
1257    if (cameraId < 0 || cameraId >= mNumberOfCameras) return NULL;
1258    return &mClientLock[cameraId];
1259}
1260
1261sp<CameraService::BasicClient> CameraService::getClientByRemote(
1262                                const wp<IBinder>& cameraClient) {
1263
1264    // Declare this before the lock to make absolutely sure the
1265    // destructor won't be called with the lock held.
1266    sp<BasicClient> client;
1267
1268    Mutex::Autolock lock(mServiceLock);
1269
1270    int outIndex;
1271    client = findClientUnsafe(cameraClient, outIndex);
1272
1273    return client;
1274}
1275
1276status_t CameraService::onTransact(
1277    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags) {
1278    // Permission checks
1279    switch (code) {
1280        case BnCameraService::CONNECT:
1281        case BnCameraService::CONNECT_PRO:
1282        case BnCameraService::CONNECT_DEVICE:
1283        case BnCameraService::CONNECT_LEGACY:
1284            const int pid = getCallingPid();
1285            const int self_pid = getpid();
1286            if (pid != self_pid) {
1287                // we're called from a different process, do the real check
1288                if (!checkCallingPermission(
1289                        String16("android.permission.CAMERA"))) {
1290                    const int uid = getCallingUid();
1291                    ALOGE("Permission Denial: "
1292                         "can't use the camera pid=%d, uid=%d", pid, uid);
1293                    return PERMISSION_DENIED;
1294                }
1295            }
1296            break;
1297    }
1298
1299    return BnCameraService::onTransact(code, data, reply, flags);
1300}
1301
1302// The reason we need this busy bit is a new CameraService::connect() request
1303// may come in while the previous Client's destructor has not been run or is
1304// still running. If the last strong reference of the previous Client is gone
1305// but the destructor has not been finished, we should not allow the new Client
1306// to be created because we need to wait for the previous Client to tear down
1307// the hardware first.
1308void CameraService::setCameraBusy(int cameraId) {
1309    android_atomic_write(1, &mBusy[cameraId]);
1310
1311    ALOGV("setCameraBusy cameraId=%d", cameraId);
1312}
1313
1314void CameraService::setCameraFree(int cameraId) {
1315    android_atomic_write(0, &mBusy[cameraId]);
1316
1317    ALOGV("setCameraFree cameraId=%d", cameraId);
1318}
1319
1320// We share the media players for shutter and recording sound for all clients.
1321// A reference count is kept to determine when we will actually release the
1322// media players.
1323
1324MediaPlayer* CameraService::newMediaPlayer(const char *file) {
1325    MediaPlayer* mp = new MediaPlayer();
1326    if (mp->setDataSource(NULL /* httpService */, file, NULL) == NO_ERROR) {
1327        mp->setAudioStreamType(AUDIO_STREAM_ENFORCED_AUDIBLE);
1328        mp->prepare();
1329    } else {
1330        ALOGE("Failed to load CameraService sounds: %s", file);
1331        return NULL;
1332    }
1333    return mp;
1334}
1335
1336void CameraService::loadSound() {
1337    Mutex::Autolock lock(mSoundLock);
1338    LOG1("CameraService::loadSound ref=%d", mSoundRef);
1339    if (mSoundRef++) return;
1340
1341    mSoundPlayer[SOUND_SHUTTER] = newMediaPlayer("/system/media/audio/ui/camera_click.ogg");
1342    mSoundPlayer[SOUND_RECORDING] = newMediaPlayer("/system/media/audio/ui/VideoRecord.ogg");
1343}
1344
1345void CameraService::releaseSound() {
1346    Mutex::Autolock lock(mSoundLock);
1347    LOG1("CameraService::releaseSound ref=%d", mSoundRef);
1348    if (--mSoundRef) return;
1349
1350    for (int i = 0; i < NUM_SOUNDS; i++) {
1351        if (mSoundPlayer[i] != 0) {
1352            mSoundPlayer[i]->disconnect();
1353            mSoundPlayer[i].clear();
1354        }
1355    }
1356}
1357
1358void CameraService::playSound(sound_kind kind) {
1359    LOG1("playSound(%d)", kind);
1360    Mutex::Autolock lock(mSoundLock);
1361    sp<MediaPlayer> player = mSoundPlayer[kind];
1362    if (player != 0) {
1363        player->seekTo(0);
1364        player->start();
1365    }
1366}
1367
1368// ----------------------------------------------------------------------------
1369
1370CameraService::Client::Client(const sp<CameraService>& cameraService,
1371        const sp<ICameraClient>& cameraClient,
1372        const String16& clientPackageName,
1373        int cameraId, int cameraFacing,
1374        int clientPid, uid_t clientUid,
1375        int servicePid) :
1376        CameraService::BasicClient(cameraService, cameraClient->asBinder(),
1377                clientPackageName,
1378                cameraId, cameraFacing,
1379                clientPid, clientUid,
1380                servicePid)
1381{
1382    int callingPid = getCallingPid();
1383    LOG1("Client::Client E (pid %d, id %d)", callingPid, cameraId);
1384
1385    mRemoteCallback = cameraClient;
1386
1387    cameraService->setCameraBusy(cameraId);
1388    cameraService->loadSound();
1389
1390    LOG1("Client::Client X (pid %d, id %d)", callingPid, cameraId);
1391}
1392
1393// tear down the client
1394CameraService::Client::~Client() {
1395    ALOGV("~Client");
1396    mDestructionStarted = true;
1397
1398    mCameraService->releaseSound();
1399    // unconditionally disconnect. function is idempotent
1400    Client::disconnect();
1401}
1402
1403CameraService::BasicClient::BasicClient(const sp<CameraService>& cameraService,
1404        const sp<IBinder>& remoteCallback,
1405        const String16& clientPackageName,
1406        int cameraId, int cameraFacing,
1407        int clientPid, uid_t clientUid,
1408        int servicePid):
1409        mClientPackageName(clientPackageName)
1410{
1411    mCameraService = cameraService;
1412    mRemoteBinder = remoteCallback;
1413    mCameraId = cameraId;
1414    mCameraFacing = cameraFacing;
1415    mClientPid = clientPid;
1416    mClientUid = clientUid;
1417    mServicePid = servicePid;
1418    mOpsActive = false;
1419    mDestructionStarted = false;
1420}
1421
1422CameraService::BasicClient::~BasicClient() {
1423    ALOGV("~BasicClient");
1424    mDestructionStarted = true;
1425}
1426
1427void CameraService::BasicClient::disconnect() {
1428    ALOGV("BasicClient::disconnect");
1429    mCameraService->removeClientByRemote(mRemoteBinder);
1430    // client shouldn't be able to call into us anymore
1431    mClientPid = 0;
1432}
1433
1434status_t CameraService::BasicClient::startCameraOps() {
1435    int32_t res;
1436
1437    mOpsCallback = new OpsCallback(this);
1438
1439    {
1440        ALOGV("%s: Start camera ops, package name = %s, client UID = %d",
1441              __FUNCTION__, String8(mClientPackageName).string(), mClientUid);
1442    }
1443
1444    mAppOpsManager.startWatchingMode(AppOpsManager::OP_CAMERA,
1445            mClientPackageName, mOpsCallback);
1446    res = mAppOpsManager.startOp(AppOpsManager::OP_CAMERA,
1447            mClientUid, mClientPackageName);
1448
1449    if (res != AppOpsManager::MODE_ALLOWED) {
1450        ALOGI("Camera %d: Access for \"%s\" has been revoked",
1451                mCameraId, String8(mClientPackageName).string());
1452        return PERMISSION_DENIED;
1453    }
1454    mOpsActive = true;
1455    return OK;
1456}
1457
1458status_t CameraService::BasicClient::finishCameraOps() {
1459    if (mOpsActive) {
1460        mAppOpsManager.finishOp(AppOpsManager::OP_CAMERA, mClientUid,
1461                mClientPackageName);
1462        mOpsActive = false;
1463    }
1464    mAppOpsManager.stopWatchingMode(mOpsCallback);
1465    mOpsCallback.clear();
1466
1467    return OK;
1468}
1469
1470void CameraService::BasicClient::opChanged(int32_t op, const String16& packageName) {
1471    String8 name(packageName);
1472    String8 myName(mClientPackageName);
1473
1474    if (op != AppOpsManager::OP_CAMERA) {
1475        ALOGW("Unexpected app ops notification received: %d", op);
1476        return;
1477    }
1478
1479    int32_t res;
1480    res = mAppOpsManager.checkOp(AppOpsManager::OP_CAMERA,
1481            mClientUid, mClientPackageName);
1482    ALOGV("checkOp returns: %d, %s ", res,
1483            res == AppOpsManager::MODE_ALLOWED ? "ALLOWED" :
1484            res == AppOpsManager::MODE_IGNORED ? "IGNORED" :
1485            res == AppOpsManager::MODE_ERRORED ? "ERRORED" :
1486            "UNKNOWN");
1487
1488    if (res != AppOpsManager::MODE_ALLOWED) {
1489        ALOGI("Camera %d: Access for \"%s\" revoked", mCameraId,
1490                myName.string());
1491        // Reset the client PID to allow server-initiated disconnect,
1492        // and to prevent further calls by client.
1493        mClientPid = getCallingPid();
1494        CaptureResultExtras resultExtras; // a dummy result (invalid)
1495        notifyError(ICameraDeviceCallbacks::ERROR_CAMERA_SERVICE, resultExtras);
1496        disconnect();
1497    }
1498}
1499
1500// ----------------------------------------------------------------------------
1501
1502Mutex* CameraService::Client::getClientLockFromCookie(void* user) {
1503    return gCameraService->getClientLockById((int)(intptr_t) user);
1504}
1505
1506// Provide client pointer for callbacks. Client lock returned from getClientLockFromCookie should
1507// be acquired for this to be safe
1508CameraService::Client* CameraService::Client::getClientFromCookie(void* user) {
1509    BasicClient *basicClient = gCameraService->getClientByIdUnsafe((int)(intptr_t) user);
1510    // OK: only CameraClient calls this, and they already cast anyway.
1511    Client* client = static_cast<Client*>(basicClient);
1512
1513    // This could happen if the Client is in the process of shutting down (the
1514    // last strong reference is gone, but the destructor hasn't finished
1515    // stopping the hardware).
1516    if (client == NULL) return NULL;
1517
1518    // destruction already started, so should not be accessed
1519    if (client->mDestructionStarted) return NULL;
1520
1521    return client;
1522}
1523
1524void CameraService::Client::notifyError(ICameraDeviceCallbacks::CameraErrorCode errorCode,
1525        const CaptureResultExtras& resultExtras) {
1526    mRemoteCallback->notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_RELEASED, 0);
1527}
1528
1529// NOTE: function is idempotent
1530void CameraService::Client::disconnect() {
1531    ALOGV("Client::disconnect");
1532    BasicClient::disconnect();
1533    mCameraService->setCameraFree(mCameraId);
1534
1535    StatusVector rejectSourceStates;
1536    rejectSourceStates.push_back(ICameraServiceListener::STATUS_NOT_PRESENT);
1537    rejectSourceStates.push_back(ICameraServiceListener::STATUS_ENUMERATING);
1538
1539    // Transition to PRESENT if the camera is not in either of above 2 states
1540    mCameraService->updateStatus(ICameraServiceListener::STATUS_PRESENT,
1541                                 mCameraId,
1542                                 &rejectSourceStates);
1543}
1544
1545CameraService::Client::OpsCallback::OpsCallback(wp<BasicClient> client):
1546        mClient(client) {
1547}
1548
1549void CameraService::Client::OpsCallback::opChanged(int32_t op,
1550        const String16& packageName) {
1551    sp<BasicClient> client = mClient.promote();
1552    if (client != NULL) {
1553        client->opChanged(op, packageName);
1554    }
1555}
1556
1557// ----------------------------------------------------------------------------
1558//                  IProCamera
1559// ----------------------------------------------------------------------------
1560
1561CameraService::ProClient::ProClient(const sp<CameraService>& cameraService,
1562        const sp<IProCameraCallbacks>& remoteCallback,
1563        const String16& clientPackageName,
1564        int cameraId,
1565        int cameraFacing,
1566        int clientPid,
1567        uid_t clientUid,
1568        int servicePid)
1569        : CameraService::BasicClient(cameraService, remoteCallback->asBinder(),
1570                clientPackageName, cameraId, cameraFacing,
1571                clientPid,  clientUid, servicePid)
1572{
1573    mRemoteCallback = remoteCallback;
1574}
1575
1576CameraService::ProClient::~ProClient() {
1577}
1578
1579void CameraService::ProClient::notifyError(ICameraDeviceCallbacks::CameraErrorCode errorCode,
1580        const CaptureResultExtras& resultExtras) {
1581    mRemoteCallback->notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_RELEASED, 0);
1582}
1583
1584// ----------------------------------------------------------------------------
1585
1586static const int kDumpLockRetries = 50;
1587static const int kDumpLockSleep = 60000;
1588
1589static bool tryLock(Mutex& mutex)
1590{
1591    bool locked = false;
1592    for (int i = 0; i < kDumpLockRetries; ++i) {
1593        if (mutex.tryLock() == NO_ERROR) {
1594            locked = true;
1595            break;
1596        }
1597        usleep(kDumpLockSleep);
1598    }
1599    return locked;
1600}
1601
1602status_t CameraService::dump(int fd, const Vector<String16>& args) {
1603    String8 result;
1604    if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
1605        result.appendFormat("Permission Denial: "
1606                "can't dump CameraService from pid=%d, uid=%d\n",
1607                getCallingPid(),
1608                getCallingUid());
1609        write(fd, result.string(), result.size());
1610    } else {
1611        bool locked = tryLock(mServiceLock);
1612        // failed to lock - CameraService is probably deadlocked
1613        if (!locked) {
1614            result.append("CameraService may be deadlocked\n");
1615            write(fd, result.string(), result.size());
1616        }
1617
1618        bool hasClient = false;
1619        if (!mModule) {
1620            result = String8::format("No camera module available!\n");
1621            write(fd, result.string(), result.size());
1622            if (locked) mServiceLock.unlock();
1623            return NO_ERROR;
1624        }
1625
1626        result = String8::format("Camera module HAL API version: 0x%x\n",
1627                mModule->common.hal_api_version);
1628        result.appendFormat("Camera module API version: 0x%x\n",
1629                mModule->common.module_api_version);
1630        result.appendFormat("Camera module name: %s\n",
1631                mModule->common.name);
1632        result.appendFormat("Camera module author: %s\n",
1633                mModule->common.author);
1634        result.appendFormat("Number of camera devices: %d\n\n", mNumberOfCameras);
1635
1636        sp<VendorTagDescriptor> desc = VendorTagDescriptor::getGlobalVendorTagDescriptor();
1637        if (desc == NULL) {
1638            result.appendFormat("Vendor tags left unimplemented.\n");
1639        } else {
1640            result.appendFormat("Vendor tag definitions:\n");
1641        }
1642
1643        write(fd, result.string(), result.size());
1644
1645        if (desc != NULL) {
1646            desc->dump(fd, /*verbosity*/2, /*indentation*/4);
1647        }
1648
1649        for (int i = 0; i < mNumberOfCameras; i++) {
1650            result = String8::format("Camera %d static information:\n", i);
1651            camera_info info;
1652
1653            status_t rc = mModule->get_camera_info(i, &info);
1654            if (rc != OK) {
1655                result.appendFormat("  Error reading static information!\n");
1656                write(fd, result.string(), result.size());
1657            } else {
1658                result.appendFormat("  Facing: %s\n",
1659                        info.facing == CAMERA_FACING_BACK ? "BACK" : "FRONT");
1660                result.appendFormat("  Orientation: %d\n", info.orientation);
1661                int deviceVersion;
1662                if (mModule->common.module_api_version <
1663                        CAMERA_MODULE_API_VERSION_2_0) {
1664                    deviceVersion = CAMERA_DEVICE_API_VERSION_1_0;
1665                } else {
1666                    deviceVersion = info.device_version;
1667                }
1668                result.appendFormat("  Device version: 0x%x\n", deviceVersion);
1669                if (deviceVersion >= CAMERA_DEVICE_API_VERSION_2_0) {
1670                    result.appendFormat("  Device static metadata:\n");
1671                    write(fd, result.string(), result.size());
1672                    dump_indented_camera_metadata(info.static_camera_characteristics,
1673                            fd, /*verbosity*/2, /*indentation*/4);
1674                } else {
1675                    write(fd, result.string(), result.size());
1676                }
1677            }
1678
1679            sp<BasicClient> client = mClient[i].promote();
1680            if (client == 0) {
1681                result = String8::format("  Device is closed, no client instance\n");
1682                write(fd, result.string(), result.size());
1683                continue;
1684            }
1685            hasClient = true;
1686            result = String8::format("  Device is open. Client instance dump:\n");
1687            write(fd, result.string(), result.size());
1688            client->dump(fd, args);
1689        }
1690        if (!hasClient) {
1691            result = String8::format("\nNo active camera clients yet.\n");
1692            write(fd, result.string(), result.size());
1693        }
1694
1695        if (locked) mServiceLock.unlock();
1696
1697        // Dump camera traces if there were any
1698        write(fd, "\n", 1);
1699        camera3::CameraTraces::dump(fd, args);
1700
1701        // change logging level
1702        int n = args.size();
1703        for (int i = 0; i + 1 < n; i++) {
1704            String16 verboseOption("-v");
1705            if (args[i] == verboseOption) {
1706                String8 levelStr(args[i+1]);
1707                int level = atoi(levelStr.string());
1708                result = String8::format("\nSetting log level to %d.\n", level);
1709                setLogLevel(level);
1710                write(fd, result.string(), result.size());
1711            }
1712        }
1713
1714    }
1715    return NO_ERROR;
1716}
1717
1718/*virtual*/void CameraService::binderDied(
1719    const wp<IBinder> &who) {
1720
1721    /**
1722      * While tempting to promote the wp<IBinder> into a sp,
1723      * it's actually not supported by the binder driver
1724      */
1725
1726    ALOGV("java clients' binder died");
1727
1728    sp<BasicClient> cameraClient = getClientByRemote(who);
1729
1730    if (cameraClient == 0) {
1731        ALOGV("java clients' binder death already cleaned up (normal case)");
1732        return;
1733    }
1734
1735    ALOGW("Disconnecting camera client %p since the binder for it "
1736          "died (this pid %d)", cameraClient.get(), getCallingPid());
1737
1738    cameraClient->disconnect();
1739
1740}
1741
1742void CameraService::updateStatus(ICameraServiceListener::Status status,
1743                                 int32_t cameraId,
1744                                 const StatusVector *rejectSourceStates) {
1745    // do not lock mServiceLock here or can get into a deadlock from
1746    //  connect() -> ProClient::disconnect -> updateStatus
1747    Mutex::Autolock lock(mStatusMutex);
1748
1749    ICameraServiceListener::Status oldStatus = mStatusList[cameraId];
1750
1751    mStatusList[cameraId] = status;
1752
1753    if (oldStatus != status) {
1754        ALOGV("%s: Status has changed for camera ID %d from 0x%x to 0x%x",
1755              __FUNCTION__, cameraId, (uint32_t)oldStatus, (uint32_t)status);
1756
1757        if (oldStatus == ICameraServiceListener::STATUS_NOT_PRESENT &&
1758            (status != ICameraServiceListener::STATUS_PRESENT &&
1759             status != ICameraServiceListener::STATUS_ENUMERATING)) {
1760
1761            ALOGW("%s: From NOT_PRESENT can only transition into PRESENT"
1762                  " or ENUMERATING", __FUNCTION__);
1763            mStatusList[cameraId] = oldStatus;
1764            return;
1765        }
1766
1767        if (rejectSourceStates != NULL) {
1768            const StatusVector &rejectList = *rejectSourceStates;
1769            StatusVector::const_iterator it = rejectList.begin();
1770
1771            /**
1772             * Sometimes we want to conditionally do a transition.
1773             * For example if a client disconnects, we want to go to PRESENT
1774             * only if we weren't already in NOT_PRESENT or ENUMERATING.
1775             */
1776            for (; it != rejectList.end(); ++it) {
1777                if (oldStatus == *it) {
1778                    ALOGV("%s: Rejecting status transition for Camera ID %d, "
1779                          " since the source state was was in one of the bad "
1780                          " states.", __FUNCTION__, cameraId);
1781                    mStatusList[cameraId] = oldStatus;
1782                    return;
1783                }
1784            }
1785        }
1786
1787        /**
1788          * ProClients lose their exclusive lock.
1789          * - Done before the CameraClient can initialize the HAL device,
1790          *   since we want to be able to close it before they get to initialize
1791          */
1792        if (status == ICameraServiceListener::STATUS_NOT_AVAILABLE) {
1793            Vector<wp<ProClient> > proClients(mProClientList[cameraId]);
1794            Vector<wp<ProClient> >::const_iterator it;
1795
1796            for (it = proClients.begin(); it != proClients.end(); ++it) {
1797                sp<ProClient> proCl = it->promote();
1798                if (proCl.get() != NULL) {
1799                    proCl->onExclusiveLockStolen();
1800                }
1801            }
1802        }
1803
1804        Vector<sp<ICameraServiceListener> >::const_iterator it;
1805        for (it = mListenerList.begin(); it != mListenerList.end(); ++it) {
1806            (*it)->onStatusChanged(status, cameraId);
1807        }
1808    }
1809}
1810
1811ICameraServiceListener::Status CameraService::getStatus(int cameraId) const {
1812    if (cameraId < 0 || cameraId >= MAX_CAMERAS) {
1813        ALOGE("%s: Invalid camera ID %d", __FUNCTION__, cameraId);
1814        return ICameraServiceListener::STATUS_UNKNOWN;
1815    }
1816
1817    Mutex::Autolock al(mStatusMutex);
1818    return mStatusList[cameraId];
1819}
1820
1821}; // namespace android
1822