CameraService.cpp revision 3d07d1ad0e60fd2b9a25563a0c24faf7f1fb1afc 
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                    deviceVersion);
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());
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        // OK: we can only get here if we were originally in PRESENT state
724        updateStatus(ICameraServiceListener::STATUS_PRESENT, cameraId);
725        return status;
726    }
727
728    mClient[cameraId] = client;
729    LOG1("CameraService::connect X (id %d, this pid is %d)", cameraId,
730         getpid());
731
732    return OK;
733}
734
735status_t CameraService::connect(
736        const sp<ICameraClient>& cameraClient,
737        int cameraId,
738        const String16& clientPackageName,
739        int clientUid,
740        /*out*/
741        sp<ICamera>& device) {
742
743    String8 clientName8(clientPackageName);
744    int callingPid = getCallingPid();
745
746    LOG1("CameraService::connect E (pid %d \"%s\", id %d)", callingPid,
747            clientName8.string(), cameraId);
748
749    status_t status = validateConnect(cameraId, /*inout*/clientUid);
750    if (status != OK) {
751        return status;
752    }
753
754
755    sp<Client> client;
756    {
757        Mutex::Autolock lock(mServiceLock);
758        sp<BasicClient> clientTmp;
759        if (!canConnectUnsafe(cameraId, clientPackageName,
760                              cameraClient->asBinder(),
761                              /*out*/clientTmp)) {
762            return -EBUSY;
763        } else if (client.get() != NULL) {
764            device = static_cast<Client*>(clientTmp.get());
765            return OK;
766        }
767
768        status = connectHelperLocked(cameraClient,
769                                     cameraId,
770                                     clientPackageName,
771                                     clientUid,
772                                     callingPid,
773                                     client);
774        if (status != OK) {
775            return status;
776        }
777
778    }
779    // important: release the mutex here so the client can call back
780    //    into the service from its destructor (can be at the end of the call)
781
782    device = client;
783    return OK;
784}
785
786status_t CameraService::connectLegacy(
787        const sp<ICameraClient>& cameraClient,
788        int cameraId, int halVersion,
789        const String16& clientPackageName,
790        int clientUid,
791        /*out*/
792        sp<ICamera>& device) {
793
794    if (halVersion != CAMERA_HAL_API_VERSION_UNSPECIFIED &&
795            mModule->common.module_api_version < CAMERA_MODULE_API_VERSION_2_3) {
796        /*
797         * Either the HAL version is unspecified in which case this just creates
798         * a camera client selected by the latest device version, or
799         * it's a particular version in which case the HAL must supported
800         * the open_legacy call
801         */
802        ALOGE("%s: camera HAL module version %x doesn't support connecting to legacy HAL devices!",
803                __FUNCTION__, mModule->common.module_api_version);
804        return INVALID_OPERATION;
805    }
806
807    String8 clientName8(clientPackageName);
808    int callingPid = getCallingPid();
809
810    LOG1("CameraService::connect legacy E (pid %d \"%s\", id %d)", callingPid,
811            clientName8.string(), cameraId);
812
813    status_t status = validateConnect(cameraId, /*inout*/clientUid);
814    if (status != OK) {
815        return status;
816    }
817
818    sp<Client> client;
819    {
820        Mutex::Autolock lock(mServiceLock);
821        sp<BasicClient> clientTmp;
822        if (!canConnectUnsafe(cameraId, clientPackageName,
823                              cameraClient->asBinder(),
824                              /*out*/clientTmp)) {
825            return -EBUSY;
826        } else if (client.get() != NULL) {
827            device = static_cast<Client*>(clientTmp.get());
828            return OK;
829        }
830
831        status = connectHelperLocked(cameraClient,
832                                     cameraId,
833                                     clientPackageName,
834                                     clientUid,
835                                     callingPid,
836                                     client,
837                                     halVersion);
838        if (status != OK) {
839            return status;
840        }
841
842    }
843    // important: release the mutex here so the client can call back
844    //    into the service from its destructor (can be at the end of the call)
845
846    device = client;
847    return OK;
848}
849
850status_t CameraService::connectFinishUnsafe(const sp<BasicClient>& client,
851                                            const sp<IBinder>& remoteCallback) {
852    status_t status = client->initialize(mModule);
853    if (status != OK) {
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        // If there are other non-exclusive users of the camera,
975        //  this will tear them down before we can reuse the camera
976        if (isValidCameraId(cameraId)) {
977            // transition from PRESENT -> NOT_AVAILABLE
978            updateStatus(ICameraServiceListener::STATUS_NOT_AVAILABLE,
979                         cameraId);
980        }
981
982        switch(deviceVersion) {
983          case CAMERA_DEVICE_API_VERSION_1_0:
984            ALOGW("Camera using old HAL version: %d", deviceVersion);
985            return -EOPNOTSUPP;
986           // TODO: don't allow 2.0  Only allow 2.1 and higher
987          case CAMERA_DEVICE_API_VERSION_2_0:
988          case CAMERA_DEVICE_API_VERSION_2_1:
989          case CAMERA_DEVICE_API_VERSION_3_0:
990          case CAMERA_DEVICE_API_VERSION_3_1:
991          case CAMERA_DEVICE_API_VERSION_3_2:
992            client = new CameraDeviceClient(this, cameraCb, clientPackageName,
993                    cameraId, facing, callingPid, clientUid, getpid());
994            break;
995          case -1:
996            ALOGE("Invalid camera id %d", cameraId);
997            return BAD_VALUE;
998          default:
999            ALOGE("Unknown camera device HAL version: %d", deviceVersion);
1000            return INVALID_OPERATION;
1001        }
1002
1003        status_t status = connectFinishUnsafe(client, client->getRemote());
1004        if (status != OK) {
1005            // this is probably not recoverable.. maybe the client can try again
1006            // OK: we can only get here if we were originally in PRESENT state
1007            updateStatus(ICameraServiceListener::STATUS_PRESENT, cameraId);
1008            return status;
1009        }
1010
1011        LOG1("CameraService::connectDevice X (id %d, this pid is %d)", cameraId,
1012                getpid());
1013
1014        mClient[cameraId] = client;
1015    }
1016    // important: release the mutex here so the client can call back
1017    //    into the service from its destructor (can be at the end of the call)
1018
1019    device = client;
1020    return OK;
1021}
1022
1023
1024status_t CameraService::addListener(
1025                                const sp<ICameraServiceListener>& listener) {
1026    ALOGV("%s: Add listener %p", __FUNCTION__, listener.get());
1027
1028    if (listener == 0) {
1029        ALOGE("%s: Listener must not be null", __FUNCTION__);
1030        return BAD_VALUE;
1031    }
1032
1033    Mutex::Autolock lock(mServiceLock);
1034
1035    Vector<sp<ICameraServiceListener> >::iterator it, end;
1036    for (it = mListenerList.begin(); it != mListenerList.end(); ++it) {
1037        if ((*it)->asBinder() == listener->asBinder()) {
1038            ALOGW("%s: Tried to add listener %p which was already subscribed",
1039                  __FUNCTION__, listener.get());
1040            return ALREADY_EXISTS;
1041        }
1042    }
1043
1044    mListenerList.push_back(listener);
1045
1046    /* Immediately signal current status to this listener only */
1047    {
1048        Mutex::Autolock m(mStatusMutex) ;
1049        int numCams = getNumberOfCameras();
1050        for (int i = 0; i < numCams; ++i) {
1051            listener->onStatusChanged(mStatusList[i], i);
1052        }
1053    }
1054
1055    return OK;
1056}
1057status_t CameraService::removeListener(
1058                                const sp<ICameraServiceListener>& listener) {
1059    ALOGV("%s: Remove listener %p", __FUNCTION__, listener.get());
1060
1061    if (listener == 0) {
1062        ALOGE("%s: Listener must not be null", __FUNCTION__);
1063        return BAD_VALUE;
1064    }
1065
1066    Mutex::Autolock lock(mServiceLock);
1067
1068    Vector<sp<ICameraServiceListener> >::iterator it;
1069    for (it = mListenerList.begin(); it != mListenerList.end(); ++it) {
1070        if ((*it)->asBinder() == listener->asBinder()) {
1071            mListenerList.erase(it);
1072            return OK;
1073        }
1074    }
1075
1076    ALOGW("%s: Tried to remove a listener %p which was not subscribed",
1077          __FUNCTION__, listener.get());
1078
1079    return BAD_VALUE;
1080}
1081
1082status_t CameraService::getLegacyParameters(
1083            int cameraId,
1084            /*out*/
1085            String16* parameters) {
1086    ALOGV("%s: for camera ID = %d", __FUNCTION__, cameraId);
1087
1088    if (parameters == NULL) {
1089        ALOGE("%s: parameters must not be null", __FUNCTION__);
1090        return BAD_VALUE;
1091    }
1092
1093    status_t ret = 0;
1094
1095    CameraParameters shimParams;
1096    if ((ret = getLegacyParametersLazy(cameraId, /*out*/&shimParams)) != OK) {
1097        // Error logged by caller
1098        return ret;
1099    }
1100
1101    String8 shimParamsString8 = shimParams.flatten();
1102    String16 shimParamsString16 = String16(shimParamsString8);
1103
1104    *parameters = shimParamsString16;
1105
1106    return OK;
1107}
1108
1109status_t CameraService::supportsCameraApi(int cameraId, int apiVersion) {
1110    ALOGV("%s: for camera ID = %d", __FUNCTION__, cameraId);
1111
1112    switch (apiVersion) {
1113        case API_VERSION_1:
1114        case API_VERSION_2:
1115            break;
1116        default:
1117            ALOGE("%s: Bad API version %d", __FUNCTION__, apiVersion);
1118            return BAD_VALUE;
1119    }
1120
1121    int facing = -1;
1122    int deviceVersion = getDeviceVersion(cameraId, &facing);
1123
1124    switch(deviceVersion) {
1125      case CAMERA_DEVICE_API_VERSION_1_0:
1126      case CAMERA_DEVICE_API_VERSION_2_0:
1127      case CAMERA_DEVICE_API_VERSION_2_1:
1128      case CAMERA_DEVICE_API_VERSION_3_0:
1129      case CAMERA_DEVICE_API_VERSION_3_1:
1130        if (apiVersion == API_VERSION_2) {
1131            ALOGV("%s: Camera id %d uses HAL prior to HAL3.2, doesn't support api2 without shim",
1132                    __FUNCTION__, cameraId);
1133            return -EOPNOTSUPP;
1134        } else { // if (apiVersion == API_VERSION_1) {
1135            ALOGV("%s: Camera id %d uses older HAL before 3.2, but api1 is always supported",
1136                    __FUNCTION__, cameraId);
1137            return OK;
1138        }
1139      case CAMERA_DEVICE_API_VERSION_3_2:
1140        ALOGV("%s: Camera id %d uses HAL3.2 or newer, supports api1/api2 directly",
1141                __FUNCTION__, cameraId);
1142        return OK;
1143      case -1:
1144        ALOGE("%s: Invalid camera id %d", __FUNCTION__, cameraId);
1145        return BAD_VALUE;
1146      default:
1147        ALOGE("%s: Unknown camera device HAL version: %d", __FUNCTION__, deviceVersion);
1148        return INVALID_OPERATION;
1149    }
1150
1151    return OK;
1152}
1153
1154void CameraService::removeClientByRemote(const wp<IBinder>& remoteBinder) {
1155    int callingPid = getCallingPid();
1156    LOG1("CameraService::removeClientByRemote E (pid %d)", callingPid);
1157
1158    // Declare this before the lock to make absolutely sure the
1159    // destructor won't be called with the lock held.
1160    Mutex::Autolock lock(mServiceLock);
1161
1162    int outIndex;
1163    sp<BasicClient> client = findClientUnsafe(remoteBinder, outIndex);
1164
1165    if (client != 0) {
1166        // Found our camera, clear and leave.
1167        LOG1("removeClient: clear camera %d", outIndex);
1168
1169        sp<IBinder> remote = client->getRemote();
1170        if (remote != NULL) {
1171            remote->unlinkToDeath(this);
1172        }
1173
1174        mClient[outIndex].clear();
1175    } else {
1176
1177        sp<ProClient> clientPro = findProClientUnsafe(remoteBinder);
1178
1179        if (clientPro != NULL) {
1180            // Found our camera, clear and leave.
1181            LOG1("removeClient: clear pro %p", clientPro.get());
1182
1183            clientPro->getRemoteCallback()->asBinder()->unlinkToDeath(this);
1184        }
1185    }
1186
1187    LOG1("CameraService::removeClientByRemote X (pid %d)", callingPid);
1188}
1189
1190sp<CameraService::ProClient> CameraService::findProClientUnsafe(
1191                        const wp<IBinder>& cameraCallbacksRemote)
1192{
1193    sp<ProClient> clientPro;
1194
1195    for (int i = 0; i < mNumberOfCameras; ++i) {
1196        Vector<size_t> removeIdx;
1197
1198        for (size_t j = 0; j < mProClientList[i].size(); ++j) {
1199            wp<ProClient> cl = mProClientList[i][j];
1200
1201            sp<ProClient> clStrong = cl.promote();
1202            if (clStrong != NULL && clStrong->getRemote() == cameraCallbacksRemote) {
1203                clientPro = clStrong;
1204                break;
1205            } else if (clStrong == NULL) {
1206                // mark to clean up dead ptr
1207                removeIdx.push(j);
1208            }
1209        }
1210
1211        // remove stale ptrs (in reverse so the indices dont change)
1212        for (ssize_t j = (ssize_t)removeIdx.size() - 1; j >= 0; --j) {
1213            mProClientList[i].removeAt(removeIdx[j]);
1214        }
1215
1216    }
1217
1218    return clientPro;
1219}
1220
1221sp<CameraService::BasicClient> CameraService::findClientUnsafe(
1222                        const wp<IBinder>& cameraClient, int& outIndex) {
1223    sp<BasicClient> client;
1224
1225    for (int i = 0; i < mNumberOfCameras; i++) {
1226
1227        // This happens when we have already disconnected (or this is
1228        // just another unused camera).
1229        if (mClient[i] == 0) continue;
1230
1231        // Promote mClient. It can fail if we are called from this path:
1232        // Client::~Client() -> disconnect() -> removeClientByRemote().
1233        client = mClient[i].promote();
1234
1235        // Clean up stale client entry
1236        if (client == NULL) {
1237            mClient[i].clear();
1238            continue;
1239        }
1240
1241        if (cameraClient == client->getRemote()) {
1242            // Found our camera
1243            outIndex = i;
1244            return client;
1245        }
1246    }
1247
1248    outIndex = -1;
1249    return NULL;
1250}
1251
1252CameraService::BasicClient* CameraService::getClientByIdUnsafe(int cameraId) {
1253    if (cameraId < 0 || cameraId >= mNumberOfCameras) return NULL;
1254    return mClient[cameraId].unsafe_get();
1255}
1256
1257Mutex* CameraService::getClientLockById(int cameraId) {
1258    if (cameraId < 0 || cameraId >= mNumberOfCameras) return NULL;
1259    return &mClientLock[cameraId];
1260}
1261
1262sp<CameraService::BasicClient> CameraService::getClientByRemote(
1263                                const wp<IBinder>& cameraClient) {
1264
1265    // Declare this before the lock to make absolutely sure the
1266    // destructor won't be called with the lock held.
1267    sp<BasicClient> client;
1268
1269    Mutex::Autolock lock(mServiceLock);
1270
1271    int outIndex;
1272    client = findClientUnsafe(cameraClient, outIndex);
1273
1274    return client;
1275}
1276
1277status_t CameraService::onTransact(
1278    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags) {
1279    // Permission checks
1280    switch (code) {
1281        case BnCameraService::CONNECT:
1282        case BnCameraService::CONNECT_PRO:
1283        case BnCameraService::CONNECT_DEVICE:
1284        case BnCameraService::CONNECT_LEGACY:
1285            const int pid = getCallingPid();
1286            const int self_pid = getpid();
1287            if (pid != self_pid) {
1288                // we're called from a different process, do the real check
1289                if (!checkCallingPermission(
1290                        String16("android.permission.CAMERA"))) {
1291                    const int uid = getCallingUid();
1292                    ALOGE("Permission Denial: "
1293                         "can't use the camera pid=%d, uid=%d", pid, uid);
1294                    return PERMISSION_DENIED;
1295                }
1296            }
1297            break;
1298    }
1299
1300    return BnCameraService::onTransact(code, data, reply, flags);
1301}
1302
1303// The reason we need this busy bit is a new CameraService::connect() request
1304// may come in while the previous Client's destructor has not been run or is
1305// still running. If the last strong reference of the previous Client is gone
1306// but the destructor has not been finished, we should not allow the new Client
1307// to be created because we need to wait for the previous Client to tear down
1308// the hardware first.
1309void CameraService::setCameraBusy(int cameraId) {
1310    android_atomic_write(1, &mBusy[cameraId]);
1311
1312    ALOGV("setCameraBusy cameraId=%d", cameraId);
1313}
1314
1315void CameraService::setCameraFree(int cameraId) {
1316    android_atomic_write(0, &mBusy[cameraId]);
1317
1318    ALOGV("setCameraFree cameraId=%d", cameraId);
1319}
1320
1321// We share the media players for shutter and recording sound for all clients.
1322// A reference count is kept to determine when we will actually release the
1323// media players.
1324
1325MediaPlayer* CameraService::newMediaPlayer(const char *file) {
1326    MediaPlayer* mp = new MediaPlayer();
1327    if (mp->setDataSource(NULL /* httpService */, file, NULL) == NO_ERROR) {
1328        mp->setAudioStreamType(AUDIO_STREAM_ENFORCED_AUDIBLE);
1329        mp->prepare();
1330    } else {
1331        ALOGE("Failed to load CameraService sounds: %s", file);
1332        return NULL;
1333    }
1334    return mp;
1335}
1336
1337void CameraService::loadSound() {
1338    Mutex::Autolock lock(mSoundLock);
1339    LOG1("CameraService::loadSound ref=%d", mSoundRef);
1340    if (mSoundRef++) return;
1341
1342    mSoundPlayer[SOUND_SHUTTER] = newMediaPlayer("/system/media/audio/ui/camera_click.ogg");
1343    mSoundPlayer[SOUND_RECORDING] = newMediaPlayer("/system/media/audio/ui/VideoRecord.ogg");
1344}
1345
1346void CameraService::releaseSound() {
1347    Mutex::Autolock lock(mSoundLock);
1348    LOG1("CameraService::releaseSound ref=%d", mSoundRef);
1349    if (--mSoundRef) return;
1350
1351    for (int i = 0; i < NUM_SOUNDS; i++) {
1352        if (mSoundPlayer[i] != 0) {
1353            mSoundPlayer[i]->disconnect();
1354            mSoundPlayer[i].clear();
1355        }
1356    }
1357}
1358
1359void CameraService::playSound(sound_kind kind) {
1360    LOG1("playSound(%d)", kind);
1361    Mutex::Autolock lock(mSoundLock);
1362    sp<MediaPlayer> player = mSoundPlayer[kind];
1363    if (player != 0) {
1364        player->seekTo(0);
1365        player->start();
1366    }
1367}
1368
1369// ----------------------------------------------------------------------------
1370
1371CameraService::Client::Client(const sp<CameraService>& cameraService,
1372        const sp<ICameraClient>& cameraClient,
1373        const String16& clientPackageName,
1374        int cameraId, int cameraFacing,
1375        int clientPid, uid_t clientUid,
1376        int servicePid) :
1377        CameraService::BasicClient(cameraService, cameraClient->asBinder(),
1378                clientPackageName,
1379                cameraId, cameraFacing,
1380                clientPid, clientUid,
1381                servicePid)
1382{
1383    int callingPid = getCallingPid();
1384    LOG1("Client::Client E (pid %d, id %d)", callingPid, cameraId);
1385
1386    mRemoteCallback = cameraClient;
1387
1388    cameraService->setCameraBusy(cameraId);
1389    cameraService->loadSound();
1390
1391    LOG1("Client::Client X (pid %d, id %d)", callingPid, cameraId);
1392}
1393
1394// tear down the client
1395CameraService::Client::~Client() {
1396    ALOGV("~Client");
1397    mDestructionStarted = true;
1398
1399    mCameraService->releaseSound();
1400    // unconditionally disconnect. function is idempotent
1401    Client::disconnect();
1402}
1403
1404CameraService::BasicClient::BasicClient(const sp<CameraService>& cameraService,
1405        const sp<IBinder>& remoteCallback,
1406        const String16& clientPackageName,
1407        int cameraId, int cameraFacing,
1408        int clientPid, uid_t clientUid,
1409        int servicePid):
1410        mClientPackageName(clientPackageName)
1411{
1412    mCameraService = cameraService;
1413    mRemoteBinder = remoteCallback;
1414    mCameraId = cameraId;
1415    mCameraFacing = cameraFacing;
1416    mClientPid = clientPid;
1417    mClientUid = clientUid;
1418    mServicePid = servicePid;
1419    mOpsActive = false;
1420    mDestructionStarted = false;
1421}
1422
1423CameraService::BasicClient::~BasicClient() {
1424    ALOGV("~BasicClient");
1425    mDestructionStarted = true;
1426}
1427
1428void CameraService::BasicClient::disconnect() {
1429    ALOGV("BasicClient::disconnect");
1430    mCameraService->removeClientByRemote(mRemoteBinder);
1431    // client shouldn't be able to call into us anymore
1432    mClientPid = 0;
1433}
1434
1435status_t CameraService::BasicClient::startCameraOps() {
1436    int32_t res;
1437
1438    mOpsCallback = new OpsCallback(this);
1439
1440    {
1441        ALOGV("%s: Start camera ops, package name = %s, client UID = %d",
1442              __FUNCTION__, String8(mClientPackageName).string(), mClientUid);
1443    }
1444
1445    mAppOpsManager.startWatchingMode(AppOpsManager::OP_CAMERA,
1446            mClientPackageName, mOpsCallback);
1447    res = mAppOpsManager.startOp(AppOpsManager::OP_CAMERA,
1448            mClientUid, mClientPackageName);
1449
1450    if (res != AppOpsManager::MODE_ALLOWED) {
1451        ALOGI("Camera %d: Access for \"%s\" has been revoked",
1452                mCameraId, String8(mClientPackageName).string());
1453        return PERMISSION_DENIED;
1454    }
1455    mOpsActive = true;
1456    return OK;
1457}
1458
1459status_t CameraService::BasicClient::finishCameraOps() {
1460    if (mOpsActive) {
1461        mAppOpsManager.finishOp(AppOpsManager::OP_CAMERA, mClientUid,
1462                mClientPackageName);
1463        mOpsActive = false;
1464    }
1465    mAppOpsManager.stopWatchingMode(mOpsCallback);
1466    mOpsCallback.clear();
1467
1468    return OK;
1469}
1470
1471void CameraService::BasicClient::opChanged(int32_t op, const String16& packageName) {
1472    String8 name(packageName);
1473    String8 myName(mClientPackageName);
1474
1475    if (op != AppOpsManager::OP_CAMERA) {
1476        ALOGW("Unexpected app ops notification received: %d", op);
1477        return;
1478    }
1479
1480    int32_t res;
1481    res = mAppOpsManager.checkOp(AppOpsManager::OP_CAMERA,
1482            mClientUid, mClientPackageName);
1483    ALOGV("checkOp returns: %d, %s ", res,
1484            res == AppOpsManager::MODE_ALLOWED ? "ALLOWED" :
1485            res == AppOpsManager::MODE_IGNORED ? "IGNORED" :
1486            res == AppOpsManager::MODE_ERRORED ? "ERRORED" :
1487            "UNKNOWN");
1488
1489    if (res != AppOpsManager::MODE_ALLOWED) {
1490        ALOGI("Camera %d: Access for \"%s\" revoked", mCameraId,
1491                myName.string());
1492        // Reset the client PID to allow server-initiated disconnect,
1493        // and to prevent further calls by client.
1494        mClientPid = getCallingPid();
1495        CaptureResultExtras resultExtras; // a dummy result (invalid)
1496        notifyError(ICameraDeviceCallbacks::ERROR_CAMERA_SERVICE, resultExtras);
1497        disconnect();
1498    }
1499}
1500
1501// ----------------------------------------------------------------------------
1502
1503Mutex* CameraService::Client::getClientLockFromCookie(void* user) {
1504    return gCameraService->getClientLockById((int)(intptr_t) user);
1505}
1506
1507// Provide client pointer for callbacks. Client lock returned from getClientLockFromCookie should
1508// be acquired for this to be safe
1509CameraService::Client* CameraService::Client::getClientFromCookie(void* user) {
1510    BasicClient *basicClient = gCameraService->getClientByIdUnsafe((int)(intptr_t) user);
1511    // OK: only CameraClient calls this, and they already cast anyway.
1512    Client* client = static_cast<Client*>(basicClient);
1513
1514    // This could happen if the Client is in the process of shutting down (the
1515    // last strong reference is gone, but the destructor hasn't finished
1516    // stopping the hardware).
1517    if (client == NULL) return NULL;
1518
1519    // destruction already started, so should not be accessed
1520    if (client->mDestructionStarted) return NULL;
1521
1522    return client;
1523}
1524
1525void CameraService::Client::notifyError(ICameraDeviceCallbacks::CameraErrorCode errorCode,
1526        const CaptureResultExtras& resultExtras) {
1527    mRemoteCallback->notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_RELEASED, 0);
1528}
1529
1530// NOTE: function is idempotent
1531void CameraService::Client::disconnect() {
1532    ALOGV("Client::disconnect");
1533    BasicClient::disconnect();
1534    mCameraService->setCameraFree(mCameraId);
1535
1536    StatusVector rejectSourceStates;
1537    rejectSourceStates.push_back(ICameraServiceListener::STATUS_NOT_PRESENT);
1538    rejectSourceStates.push_back(ICameraServiceListener::STATUS_ENUMERATING);
1539
1540    // Transition to PRESENT if the camera is not in either of above 2 states
1541    mCameraService->updateStatus(ICameraServiceListener::STATUS_PRESENT,
1542                                 mCameraId,
1543                                 &rejectSourceStates);
1544}
1545
1546CameraService::Client::OpsCallback::OpsCallback(wp<BasicClient> client):
1547        mClient(client) {
1548}
1549
1550void CameraService::Client::OpsCallback::opChanged(int32_t op,
1551        const String16& packageName) {
1552    sp<BasicClient> client = mClient.promote();
1553    if (client != NULL) {
1554        client->opChanged(op, packageName);
1555    }
1556}
1557
1558// ----------------------------------------------------------------------------
1559//                  IProCamera
1560// ----------------------------------------------------------------------------
1561
1562CameraService::ProClient::ProClient(const sp<CameraService>& cameraService,
1563        const sp<IProCameraCallbacks>& remoteCallback,
1564        const String16& clientPackageName,
1565        int cameraId,
1566        int cameraFacing,
1567        int clientPid,
1568        uid_t clientUid,
1569        int servicePid)
1570        : CameraService::BasicClient(cameraService, remoteCallback->asBinder(),
1571                clientPackageName, cameraId, cameraFacing,
1572                clientPid,  clientUid, servicePid)
1573{
1574    mRemoteCallback = remoteCallback;
1575}
1576
1577CameraService::ProClient::~ProClient() {
1578}
1579
1580void CameraService::ProClient::notifyError(ICameraDeviceCallbacks::CameraErrorCode errorCode,
1581        const CaptureResultExtras& resultExtras) {
1582    mRemoteCallback->notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_RELEASED, 0);
1583}
1584
1585// ----------------------------------------------------------------------------
1586
1587static const int kDumpLockRetries = 50;
1588static const int kDumpLockSleep = 60000;
1589
1590static bool tryLock(Mutex& mutex)
1591{
1592    bool locked = false;
1593    for (int i = 0; i < kDumpLockRetries; ++i) {
1594        if (mutex.tryLock() == NO_ERROR) {
1595            locked = true;
1596            break;
1597        }
1598        usleep(kDumpLockSleep);
1599    }
1600    return locked;
1601}
1602
1603status_t CameraService::dump(int fd, const Vector<String16>& args) {
1604    String8 result;
1605    if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
1606        result.appendFormat("Permission Denial: "
1607                "can't dump CameraService from pid=%d, uid=%d\n",
1608                getCallingPid(),
1609                getCallingUid());
1610        write(fd, result.string(), result.size());
1611    } else {
1612        bool locked = tryLock(mServiceLock);
1613        // failed to lock - CameraService is probably deadlocked
1614        if (!locked) {
1615            result.append("CameraService may be deadlocked\n");
1616            write(fd, result.string(), result.size());
1617        }
1618
1619        bool hasClient = false;
1620        if (!mModule) {
1621            result = String8::format("No camera module available!\n");
1622            write(fd, result.string(), result.size());
1623            if (locked) mServiceLock.unlock();
1624            return NO_ERROR;
1625        }
1626
1627        result = String8::format("Camera module HAL API version: 0x%x\n",
1628                mModule->common.hal_api_version);
1629        result.appendFormat("Camera module API version: 0x%x\n",
1630                mModule->common.module_api_version);
1631        result.appendFormat("Camera module name: %s\n",
1632                mModule->common.name);
1633        result.appendFormat("Camera module author: %s\n",
1634                mModule->common.author);
1635        result.appendFormat("Number of camera devices: %d\n\n", mNumberOfCameras);
1636
1637        sp<VendorTagDescriptor> desc = VendorTagDescriptor::getGlobalVendorTagDescriptor();
1638        if (desc == NULL) {
1639            result.appendFormat("Vendor tags left unimplemented.\n");
1640        } else {
1641            result.appendFormat("Vendor tag definitions:\n");
1642        }
1643
1644        write(fd, result.string(), result.size());
1645
1646        if (desc != NULL) {
1647            desc->dump(fd, /*verbosity*/2, /*indentation*/4);
1648        }
1649
1650        for (int i = 0; i < mNumberOfCameras; i++) {
1651            result = String8::format("Camera %d static information:\n", i);
1652            camera_info info;
1653
1654            status_t rc = mModule->get_camera_info(i, &info);
1655            if (rc != OK) {
1656                result.appendFormat("  Error reading static information!\n");
1657                write(fd, result.string(), result.size());
1658            } else {
1659                result.appendFormat("  Facing: %s\n",
1660                        info.facing == CAMERA_FACING_BACK ? "BACK" : "FRONT");
1661                result.appendFormat("  Orientation: %d\n", info.orientation);
1662                int deviceVersion;
1663                if (mModule->common.module_api_version <
1664                        CAMERA_MODULE_API_VERSION_2_0) {
1665                    deviceVersion = CAMERA_DEVICE_API_VERSION_1_0;
1666                } else {
1667                    deviceVersion = info.device_version;
1668                }
1669                result.appendFormat("  Device version: 0x%x\n", deviceVersion);
1670                if (deviceVersion >= CAMERA_DEVICE_API_VERSION_2_0) {
1671                    result.appendFormat("  Device static metadata:\n");
1672                    write(fd, result.string(), result.size());
1673                    dump_indented_camera_metadata(info.static_camera_characteristics,
1674                            fd, /*verbosity*/2, /*indentation*/4);
1675                } else {
1676                    write(fd, result.string(), result.size());
1677                }
1678            }
1679
1680            sp<BasicClient> client = mClient[i].promote();
1681            if (client == 0) {
1682                result = String8::format("  Device is closed, no client instance\n");
1683                write(fd, result.string(), result.size());
1684                continue;
1685            }
1686            hasClient = true;
1687            result = String8::format("  Device is open. Client instance dump:\n");
1688            write(fd, result.string(), result.size());
1689            client->dump(fd, args);
1690        }
1691        if (!hasClient) {
1692            result = String8::format("\nNo active camera clients yet.\n");
1693            write(fd, result.string(), result.size());
1694        }
1695
1696        if (locked) mServiceLock.unlock();
1697
1698        // Dump camera traces if there were any
1699        write(fd, "\n", 1);
1700        camera3::CameraTraces::dump(fd, args);
1701
1702        // change logging level
1703        int n = args.size();
1704        for (int i = 0; i + 1 < n; i++) {
1705            String16 verboseOption("-v");
1706            if (args[i] == verboseOption) {
1707                String8 levelStr(args[i+1]);
1708                int level = atoi(levelStr.string());
1709                result = String8::format("\nSetting log level to %d.\n", level);
1710                setLogLevel(level);
1711                write(fd, result.string(), result.size());
1712            }
1713        }
1714
1715    }
1716    return NO_ERROR;
1717}
1718
1719/*virtual*/void CameraService::binderDied(
1720    const wp<IBinder> &who) {
1721
1722    /**
1723      * While tempting to promote the wp<IBinder> into a sp,
1724      * it's actually not supported by the binder driver
1725      */
1726
1727    ALOGV("java clients' binder died");
1728
1729    sp<BasicClient> cameraClient = getClientByRemote(who);
1730
1731    if (cameraClient == 0) {
1732        ALOGV("java clients' binder death already cleaned up (normal case)");
1733        return;
1734    }
1735
1736    ALOGW("Disconnecting camera client %p since the binder for it "
1737          "died (this pid %d)", cameraClient.get(), getCallingPid());
1738
1739    cameraClient->disconnect();
1740
1741}
1742
1743void CameraService::updateStatus(ICameraServiceListener::Status status,
1744                                 int32_t cameraId,
1745                                 const StatusVector *rejectSourceStates) {
1746    // do not lock mServiceLock here or can get into a deadlock from
1747    //  connect() -> ProClient::disconnect -> updateStatus
1748    Mutex::Autolock lock(mStatusMutex);
1749
1750    ICameraServiceListener::Status oldStatus = mStatusList[cameraId];
1751
1752    mStatusList[cameraId] = status;
1753
1754    if (oldStatus != status) {
1755        ALOGV("%s: Status has changed for camera ID %d from 0x%x to 0x%x",
1756              __FUNCTION__, cameraId, (uint32_t)oldStatus, (uint32_t)status);
1757
1758        if (oldStatus == ICameraServiceListener::STATUS_NOT_PRESENT &&
1759            (status != ICameraServiceListener::STATUS_PRESENT &&
1760             status != ICameraServiceListener::STATUS_ENUMERATING)) {
1761
1762            ALOGW("%s: From NOT_PRESENT can only transition into PRESENT"
1763                  " or ENUMERATING", __FUNCTION__);
1764            mStatusList[cameraId] = oldStatus;
1765            return;
1766        }
1767
1768        if (rejectSourceStates != NULL) {
1769            const StatusVector &rejectList = *rejectSourceStates;
1770            StatusVector::const_iterator it = rejectList.begin();
1771
1772            /**
1773             * Sometimes we want to conditionally do a transition.
1774             * For example if a client disconnects, we want to go to PRESENT
1775             * only if we weren't already in NOT_PRESENT or ENUMERATING.
1776             */
1777            for (; it != rejectList.end(); ++it) {
1778                if (oldStatus == *it) {
1779                    ALOGV("%s: Rejecting status transition for Camera ID %d, "
1780                          " since the source state was was in one of the bad "
1781                          " states.", __FUNCTION__, cameraId);
1782                    mStatusList[cameraId] = oldStatus;
1783                    return;
1784                }
1785            }
1786        }
1787
1788        /**
1789          * ProClients lose their exclusive lock.
1790          * - Done before the CameraClient can initialize the HAL device,
1791          *   since we want to be able to close it before they get to initialize
1792          */
1793        if (status == ICameraServiceListener::STATUS_NOT_AVAILABLE) {
1794            Vector<wp<ProClient> > proClients(mProClientList[cameraId]);
1795            Vector<wp<ProClient> >::const_iterator it;
1796
1797            for (it = proClients.begin(); it != proClients.end(); ++it) {
1798                sp<ProClient> proCl = it->promote();
1799                if (proCl.get() != NULL) {
1800                    proCl->onExclusiveLockStolen();
1801                }
1802            }
1803        }
1804
1805        Vector<sp<ICameraServiceListener> >::const_iterator it;
1806        for (it = mListenerList.begin(); it != mListenerList.end(); ++it) {
1807            (*it)->onStatusChanged(status, cameraId);
1808        }
1809    }
1810}
1811
1812ICameraServiceListener::Status CameraService::getStatus(int cameraId) const {
1813    if (cameraId < 0 || cameraId >= MAX_CAMERAS) {
1814        ALOGE("%s: Invalid camera ID %d", __FUNCTION__, cameraId);
1815        return ICameraServiceListener::STATUS_UNKNOWN;
1816    }
1817
1818    Mutex::Autolock al(mStatusMutex);
1819    return mStatusList[cameraId];
1820}
1821
1822}; // namespace android
1823