1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
|
/*
**
** Copyright (C) 2008, The Android Open Source Project
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
#define LOG_TAG "CameraService"
//#define LOG_NDEBUG 0
#include <stdio.h>
#include <sys/types.h>
#include <pthread.h>
#include <binder/AppOpsManager.h>
#include <binder/IPCThreadState.h>
#include <binder/IServiceManager.h>
#include <binder/MemoryBase.h>
#include <binder/MemoryHeapBase.h>
#include <cutils/atomic.h>
#include <cutils/properties.h>
#include <gui/Surface.h>
#include <hardware/hardware.h>
#include <media/AudioSystem.h>
#include <media/mediaplayer.h>
#include <utils/Errors.h>
#include <utils/Log.h>
#include <utils/String16.h>
#include "CameraService.h"
#include "api1/CameraClient.h"
#include "api1/Camera2Client.h"
#include "api_pro/ProCamera2Client.h"
#include "api2/CameraDeviceClient.h"
#include "utils/CameraTraces.h"
#include "CameraDeviceFactory.h"
namespace android {
// ----------------------------------------------------------------------------
// Logging support -- this is for debugging only
// Use "adb shell dumpsys media.camera -v 1" to change it.
volatile int32_t gLogLevel = 0;
#define LOG1(...) ALOGD_IF(gLogLevel >= 1, __VA_ARGS__);
#define LOG2(...) ALOGD_IF(gLogLevel >= 2, __VA_ARGS__);
static void setLogLevel(int level) {
android_atomic_write(level, &gLogLevel);
}
// ----------------------------------------------------------------------------
static int getCallingPid() {
return IPCThreadState::self()->getCallingPid();
}
static int getCallingUid() {
return IPCThreadState::self()->getCallingUid();
}
extern "C" {
static void camera_device_status_change(
const struct camera_module_callbacks* callbacks,
int camera_id,
int new_status) {
sp<CameraService> cs = const_cast<CameraService*>(
static_cast<const CameraService*>(callbacks));
cs->onDeviceStatusChanged(
camera_id,
new_status);
}
} // extern "C"
// ----------------------------------------------------------------------------
// This is ugly and only safe if we never re-create the CameraService, but
// should be ok for now.
static CameraService *gCameraService;
CameraService::CameraService()
:mSoundRef(0), mModule(0)
{
ALOGI("CameraService started (pid=%d)", getpid());
gCameraService = this;
for (size_t i = 0; i < MAX_CAMERAS; ++i) {
mStatusList[i] = ICameraServiceListener::STATUS_PRESENT;
}
this->camera_device_status_change = android::camera_device_status_change;
}
void CameraService::onFirstRef()
{
LOG1("CameraService::onFirstRef");
BnCameraService::onFirstRef();
if (hw_get_module(CAMERA_HARDWARE_MODULE_ID,
(const hw_module_t **)&mModule) < 0) {
ALOGE("Could not load camera HAL module");
mNumberOfCameras = 0;
}
else {
ALOGI("Loaded \"%s\" camera module", mModule->common.name);
mNumberOfCameras = mModule->get_number_of_cameras();
if (mNumberOfCameras > MAX_CAMERAS) {
ALOGE("Number of cameras(%d) > MAX_CAMERAS(%d).",
mNumberOfCameras, MAX_CAMERAS);
mNumberOfCameras = MAX_CAMERAS;
}
for (int i = 0; i < mNumberOfCameras; i++) {
setCameraFree(i);
}
if (mModule->common.module_api_version >=
CAMERA_MODULE_API_VERSION_2_1) {
mModule->set_callbacks(this);
}
CameraDeviceFactory::registerService(this);
}
}
CameraService::~CameraService() {
for (int i = 0; i < mNumberOfCameras; i++) {
if (mBusy[i]) {
ALOGE("camera %d is still in use in destructor!", i);
}
}
gCameraService = NULL;
}
void CameraService::onDeviceStatusChanged(int cameraId,
int newStatus)
{
ALOGI("%s: Status changed for cameraId=%d, newStatus=%d", __FUNCTION__,
cameraId, newStatus);
if (cameraId < 0 || cameraId >= MAX_CAMERAS) {
ALOGE("%s: Bad camera ID %d", __FUNCTION__, cameraId);
return;
}
if ((int)getStatus(cameraId) == newStatus) {
ALOGE("%s: State transition to the same status 0x%x not allowed",
__FUNCTION__, (uint32_t)newStatus);
return;
}
/* don't do this in updateStatus
since it is also called from connect and we could get into a deadlock */
if (newStatus == CAMERA_DEVICE_STATUS_NOT_PRESENT) {
Vector<sp<BasicClient> > clientsToDisconnect;
{
Mutex::Autolock al(mServiceLock);
/* Find all clients that we need to disconnect */
sp<BasicClient> client = mClient[cameraId].promote();
if (client.get() != NULL) {
clientsToDisconnect.push_back(client);
}
int i = cameraId;
for (size_t j = 0; j < mProClientList[i].size(); ++j) {
sp<ProClient> cl = mProClientList[i][j].promote();
if (cl != NULL) {
clientsToDisconnect.push_back(cl);
}
}
}
/* now disconnect them. don't hold the lock
or we can get into a deadlock */
for (size_t i = 0; i < clientsToDisconnect.size(); ++i) {
sp<BasicClient> client = clientsToDisconnect[i];
client->disconnect();
/**
* The remote app will no longer be able to call methods on the
* client since the client PID will be reset to 0
*/
}
ALOGV("%s: After unplug, disconnected %zu clients",
__FUNCTION__, clientsToDisconnect.size());
}
updateStatus(
static_cast<ICameraServiceListener::Status>(newStatus), cameraId);
}
int32_t CameraService::getNumberOfCameras() {
return mNumberOfCameras;
}
status_t CameraService::getCameraInfo(int cameraId,
struct CameraInfo* cameraInfo) {
if (!mModule) {
return -ENODEV;
}
if (cameraId < 0 || cameraId >= mNumberOfCameras) {
return BAD_VALUE;
}
struct camera_info info;
status_t rc = mModule->get_camera_info(cameraId, &info);
cameraInfo->facing = info.facing;
cameraInfo->orientation = info.orientation;
return rc;
}
status_t CameraService::getCameraCharacteristics(int cameraId,
CameraMetadata* cameraInfo) {
if (!cameraInfo) {
ALOGE("%s: cameraInfo is NULL", __FUNCTION__);
return BAD_VALUE;
}
if (!mModule) {
ALOGE("%s: camera hardware module doesn't exist", __FUNCTION__);
return -ENODEV;
}
if (mModule->common.module_api_version < CAMERA_MODULE_API_VERSION_2_0) {
// TODO: Remove this check once HAL1 shim is in place.
ALOGE("%s: Only HAL module version V2 or higher supports static metadata", __FUNCTION__);
return BAD_VALUE;
}
if (cameraId < 0 || cameraId >= mNumberOfCameras) {
ALOGE("%s: Invalid camera id: %d", __FUNCTION__, cameraId);
return BAD_VALUE;
}
int facing;
if (getDeviceVersion(cameraId, &facing) == CAMERA_DEVICE_API_VERSION_1_0) {
// TODO: Remove this check once HAL1 shim is in place.
ALOGE("%s: HAL1 doesn't support static metadata yet", __FUNCTION__);
return BAD_VALUE;
}
if (getDeviceVersion(cameraId, &facing) <= CAMERA_DEVICE_API_VERSION_2_1) {
// Disable HAL2.x support for camera2 API for now.
ALOGW("%s: HAL2.x doesn't support getCameraCharacteristics for now", __FUNCTION__);
return BAD_VALUE;
}
struct camera_info info;
status_t ret = mModule->get_camera_info(cameraId, &info);
*cameraInfo = info.static_camera_characteristics;
return ret;
}
int CameraService::getDeviceVersion(int cameraId, int* facing) {
struct camera_info info;
if (mModule->get_camera_info(cameraId, &info) != OK) {
return -1;
}
int deviceVersion;
if (mModule->common.module_api_version >= CAMERA_MODULE_API_VERSION_2_0) {
deviceVersion = info.device_version;
} else {
deviceVersion = CAMERA_DEVICE_API_VERSION_1_0;
}
if (facing) {
*facing = info.facing;
}
return deviceVersion;
}
bool CameraService::isValidCameraId(int cameraId) {
int facing;
int deviceVersion = getDeviceVersion(cameraId, &facing);
switch(deviceVersion) {
case CAMERA_DEVICE_API_VERSION_1_0:
case CAMERA_DEVICE_API_VERSION_2_0:
case CAMERA_DEVICE_API_VERSION_2_1:
case CAMERA_DEVICE_API_VERSION_3_0:
return true;
default:
return false;
}
return false;
}
status_t CameraService::validateConnect(int cameraId,
/*inout*/
int& clientUid) const {
int callingPid = getCallingPid();
if (clientUid == USE_CALLING_UID) {
clientUid = getCallingUid();
} else {
// We only trust our own process to forward client UIDs
if (callingPid != getpid()) {
ALOGE("CameraService::connect X (pid %d) rejected (don't trust clientUid)",
callingPid);
return PERMISSION_DENIED;
}
}
if (!mModule) {
ALOGE("Camera HAL module not loaded");
return -ENODEV;
}
if (cameraId < 0 || cameraId >= mNumberOfCameras) {
ALOGE("CameraService::connect X (pid %d) rejected (invalid cameraId %d).",
callingPid, cameraId);
return -ENODEV;
}
char value[PROPERTY_VALUE_MAX];
property_get("sys.secpolicy.camera.disabled", value, "0");
if (strcmp(value, "1") == 0) {
// Camera is disabled by DevicePolicyManager.
ALOGI("Camera is disabled. connect X (pid %d) rejected", callingPid);
return -EACCES;
}
ICameraServiceListener::Status currentStatus = getStatus(cameraId);
if (currentStatus == ICameraServiceListener::STATUS_NOT_PRESENT) {
ALOGI("Camera is not plugged in,"
" connect X (pid %d) rejected", callingPid);
return -ENODEV;
} else if (currentStatus == ICameraServiceListener::STATUS_ENUMERATING) {
ALOGI("Camera is enumerating,"
" connect X (pid %d) rejected", callingPid);
return -EBUSY;
}
// Else don't check for STATUS_NOT_AVAILABLE.
// -- It's done implicitly in canConnectUnsafe /w the mBusy array
return OK;
}
bool CameraService::canConnectUnsafe(int cameraId,
const String16& clientPackageName,
const sp<IBinder>& remoteCallback,
sp<BasicClient> &client) {
String8 clientName8(clientPackageName);
int callingPid = getCallingPid();
if (mClient[cameraId] != 0) {
client = mClient[cameraId].promote();
if (client != 0) {
if (remoteCallback == client->getRemote()) {
LOG1("CameraService::connect X (pid %d) (the same client)",
callingPid);
return true;
} else {
// TODOSC: need to support 1 regular client,
// multiple shared clients here
ALOGW("CameraService::connect X (pid %d) rejected"
" (existing client).", callingPid);
return false;
}
}
mClient[cameraId].clear();
}
/*
mBusy is set to false as the last step of the Client destructor,
after which it is guaranteed that the Client destructor has finished (
including any inherited destructors)
We only need this for a Client subclasses since we don't allow
multiple Clents to be opened concurrently, but multiple BasicClient
would be fine
*/
if (mBusy[cameraId]) {
ALOGW("CameraService::connect X (pid %d, \"%s\") rejected"
" (camera %d is still busy).", callingPid,
clientName8.string(), cameraId);
return false;
}
return true;
}
status_t CameraService::connect(
const sp<ICameraClient>& cameraClient,
int cameraId,
const String16& clientPackageName,
int clientUid,
/*out*/
sp<ICamera>& device) {
String8 clientName8(clientPackageName);
int callingPid = getCallingPid();
LOG1("CameraService::connect E (pid %d \"%s\", id %d)", callingPid,
clientName8.string(), cameraId);
status_t status = validateConnect(cameraId, /*inout*/clientUid);
if (status != OK) {
return status;
}
sp<Client> client;
{
Mutex::Autolock lock(mServiceLock);
sp<BasicClient> clientTmp;
if (!canConnectUnsafe(cameraId, clientPackageName,
cameraClient->asBinder(),
/*out*/clientTmp)) {
return -EBUSY;
} else if (client.get() != NULL) {
device = static_cast<Client*>(clientTmp.get());
return OK;
}
int facing = -1;
int deviceVersion = getDeviceVersion(cameraId, &facing);
// If there are other non-exclusive users of the camera,
// this will tear them down before we can reuse the camera
if (isValidCameraId(cameraId)) {
// transition from PRESENT -> NOT_AVAILABLE
updateStatus(ICameraServiceListener::STATUS_NOT_AVAILABLE,
cameraId);
}
switch(deviceVersion) {
case CAMERA_DEVICE_API_VERSION_1_0:
client = new CameraClient(this, cameraClient,
clientPackageName, cameraId,
facing, callingPid, clientUid, getpid());
break;
case CAMERA_DEVICE_API_VERSION_2_0:
case CAMERA_DEVICE_API_VERSION_2_1:
case CAMERA_DEVICE_API_VERSION_3_0:
client = new Camera2Client(this, cameraClient,
clientPackageName, cameraId,
facing, callingPid, clientUid, getpid(),
deviceVersion);
break;
case -1:
ALOGE("Invalid camera id %d", cameraId);
return BAD_VALUE;
default:
ALOGE("Unknown camera device HAL version: %d", deviceVersion);
return INVALID_OPERATION;
}
status_t status = connectFinishUnsafe(client, client->getRemote());
if (status != OK) {
// this is probably not recoverable.. maybe the client can try again
// OK: we can only get here if we were originally in PRESENT state
updateStatus(ICameraServiceListener::STATUS_PRESENT, cameraId);
return status;
}
mClient[cameraId] = client;
LOG1("CameraService::connect X (id %d, this pid is %d)", cameraId,
getpid());
}
// important: release the mutex here so the client can call back
// into the service from its destructor (can be at the end of the call)
device = client;
return OK;
}
status_t CameraService::connectFinishUnsafe(const sp<BasicClient>& client,
const sp<IBinder>& remoteCallback) {
status_t status = client->initialize(mModule);
if (status != OK) {
return status;
}
remoteCallback->linkToDeath(this);
return OK;
}
status_t CameraService::connectPro(
const sp<IProCameraCallbacks>& cameraCb,
int cameraId,
const String16& clientPackageName,
int clientUid,
/*out*/
sp<IProCameraUser>& device)
{
String8 clientName8(clientPackageName);
int callingPid = getCallingPid();
LOG1("CameraService::connectPro E (pid %d \"%s\", id %d)", callingPid,
clientName8.string(), cameraId);
status_t status = validateConnect(cameraId, /*inout*/clientUid);
if (status != OK) {
return status;
}
sp<ProClient> client;
{
Mutex::Autolock lock(mServiceLock);
{
sp<BasicClient> client;
if (!canConnectUnsafe(cameraId, clientPackageName,
cameraCb->asBinder(),
/*out*/client)) {
return -EBUSY;
}
}
int facing = -1;
int deviceVersion = getDeviceVersion(cameraId, &facing);
switch(deviceVersion) {
case CAMERA_DEVICE_API_VERSION_1_0:
ALOGE("Camera id %d uses HALv1, doesn't support ProCamera",
cameraId);
return -EOPNOTSUPP;
break;
case CAMERA_DEVICE_API_VERSION_2_0:
case CAMERA_DEVICE_API_VERSION_2_1:
case CAMERA_DEVICE_API_VERSION_3_0:
client = new ProCamera2Client(this, cameraCb, String16(),
cameraId, facing, callingPid, USE_CALLING_UID, getpid());
break;
case -1:
ALOGE("Invalid camera id %d", cameraId);
return BAD_VALUE;
default:
ALOGE("Unknown camera device HAL version: %d", deviceVersion);
return INVALID_OPERATION;
}
status_t status = connectFinishUnsafe(client, client->getRemote());
if (status != OK) {
return status;
}
mProClientList[cameraId].push(client);
LOG1("CameraService::connectPro X (id %d, this pid is %d)", cameraId,
getpid());
}
// important: release the mutex here so the client can call back
// into the service from its destructor (can be at the end of the call)
device = client;
return OK;
}
status_t CameraService::connectDevice(
const sp<ICameraDeviceCallbacks>& cameraCb,
int cameraId,
const String16& clientPackageName,
int clientUid,
/*out*/
sp<ICameraDeviceUser>& device)
{
String8 clientName8(clientPackageName);
int callingPid = getCallingPid();
LOG1("CameraService::connectDevice E (pid %d \"%s\", id %d)", callingPid,
clientName8.string(), cameraId);
status_t status = validateConnect(cameraId, /*inout*/clientUid);
if (status != OK) {
return status;
}
sp<CameraDeviceClient> client;
{
Mutex::Autolock lock(mServiceLock);
{
sp<BasicClient> client;
if (!canConnectUnsafe(cameraId, clientPackageName,
cameraCb->asBinder(),
/*out*/client)) {
return -EBUSY;
}
}
int facing = -1;
int deviceVersion = getDeviceVersion(cameraId, &facing);
// If there are other non-exclusive users of the camera,
// this will tear them down before we can reuse the camera
if (isValidCameraId(cameraId)) {
// transition from PRESENT -> NOT_AVAILABLE
updateStatus(ICameraServiceListener::STATUS_NOT_AVAILABLE,
cameraId);
}
switch(deviceVersion) {
case CAMERA_DEVICE_API_VERSION_1_0:
ALOGW("Camera using old HAL version: %d", deviceVersion);
return -EOPNOTSUPP;
// TODO: don't allow 2.0 Only allow 2.1 and higher
case CAMERA_DEVICE_API_VERSION_2_0:
case CAMERA_DEVICE_API_VERSION_2_1:
case CAMERA_DEVICE_API_VERSION_3_0:
client = new CameraDeviceClient(this, cameraCb, String16(),
cameraId, facing, callingPid, USE_CALLING_UID, getpid());
break;
case -1:
ALOGE("Invalid camera id %d", cameraId);
return BAD_VALUE;
default:
ALOGE("Unknown camera device HAL version: %d", deviceVersion);
return INVALID_OPERATION;
}
status_t status = connectFinishUnsafe(client, client->getRemote());
if (status != OK) {
// this is probably not recoverable.. maybe the client can try again
// OK: we can only get here if we were originally in PRESENT state
updateStatus(ICameraServiceListener::STATUS_PRESENT, cameraId);
return status;
}
LOG1("CameraService::connectDevice X (id %d, this pid is %d)", cameraId,
getpid());
mClient[cameraId] = client;
}
// important: release the mutex here so the client can call back
// into the service from its destructor (can be at the end of the call)
device = client;
return OK;
}
status_t CameraService::addListener(
const sp<ICameraServiceListener>& listener) {
ALOGV("%s: Add listener %p", __FUNCTION__, listener.get());
Mutex::Autolock lock(mServiceLock);
Vector<sp<ICameraServiceListener> >::iterator it, end;
for (it = mListenerList.begin(); it != mListenerList.end(); ++it) {
if ((*it)->asBinder() == listener->asBinder()) {
ALOGW("%s: Tried to add listener %p which was already subscribed",
__FUNCTION__, listener.get());
return ALREADY_EXISTS;
}
}
mListenerList.push_back(listener);
/* Immediately signal current status to this listener only */
{
Mutex::Autolock m(mStatusMutex) ;
int numCams = getNumberOfCameras();
for (int i = 0; i < numCams; ++i) {
listener->onStatusChanged(mStatusList[i], i);
}
}
return OK;
}
status_t CameraService::removeListener(
const sp<ICameraServiceListener>& listener) {
ALOGV("%s: Remove listener %p", __FUNCTION__, listener.get());
Mutex::Autolock lock(mServiceLock);
Vector<sp<ICameraServiceListener> >::iterator it;
for (it = mListenerList.begin(); it != mListenerList.end(); ++it) {
if ((*it)->asBinder() == listener->asBinder()) {
mListenerList.erase(it);
return OK;
}
}
ALOGW("%s: Tried to remove a listener %p which was not subscribed",
__FUNCTION__, listener.get());
return BAD_VALUE;
}
void CameraService::removeClientByRemote(const wp<IBinder>& remoteBinder) {
int callingPid = getCallingPid();
LOG1("CameraService::removeClientByRemote E (pid %d)", callingPid);
// Declare this before the lock to make absolutely sure the
// destructor won't be called with the lock held.
Mutex::Autolock lock(mServiceLock);
int outIndex;
sp<BasicClient> client = findClientUnsafe(remoteBinder, outIndex);
if (client != 0) {
// Found our camera, clear and leave.
LOG1("removeClient: clear camera %d", outIndex);
mClient[outIndex].clear();
client->getRemote()->unlinkToDeath(this);
} else {
sp<ProClient> clientPro = findProClientUnsafe(remoteBinder);
if (clientPro != NULL) {
// Found our camera, clear and leave.
LOG1("removeClient: clear pro %p", clientPro.get());
clientPro->getRemoteCallback()->asBinder()->unlinkToDeath(this);
}
}
LOG1("CameraService::removeClientByRemote X (pid %d)", callingPid);
}
sp<CameraService::ProClient> CameraService::findProClientUnsafe(
const wp<IBinder>& cameraCallbacksRemote)
{
sp<ProClient> clientPro;
for (int i = 0; i < mNumberOfCameras; ++i) {
Vector<size_t> removeIdx;
for (size_t j = 0; j < mProClientList[i].size(); ++j) {
wp<ProClient> cl = mProClientList[i][j];
sp<ProClient> clStrong = cl.promote();
if (clStrong != NULL && clStrong->getRemote() == cameraCallbacksRemote) {
clientPro = clStrong;
break;
} else if (clStrong == NULL) {
// mark to clean up dead ptr
removeIdx.push(j);
}
}
// remove stale ptrs (in reverse so the indices dont change)
for (ssize_t j = (ssize_t)removeIdx.size() - 1; j >= 0; --j) {
mProClientList[i].removeAt(removeIdx[j]);
}
}
return clientPro;
}
sp<CameraService::BasicClient> CameraService::findClientUnsafe(
const wp<IBinder>& cameraClient, int& outIndex) {
sp<BasicClient> client;
for (int i = 0; i < mNumberOfCameras; i++) {
// This happens when we have already disconnected (or this is
// just another unused camera).
if (mClient[i] == 0) continue;
// Promote mClient. It can fail if we are called from this path:
// Client::~Client() -> disconnect() -> removeClientByRemote().
client = mClient[i].promote();
// Clean up stale client entry
if (client == NULL) {
mClient[i].clear();
continue;
}
if (cameraClient == client->getRemote()) {
// Found our camera
outIndex = i;
return client;
}
}
outIndex = -1;
return NULL;
}
CameraService::BasicClient* CameraService::getClientByIdUnsafe(int cameraId) {
if (cameraId < 0 || cameraId >= mNumberOfCameras) return NULL;
return mClient[cameraId].unsafe_get();
}
Mutex* CameraService::getClientLockById(int cameraId) {
if (cameraId < 0 || cameraId >= mNumberOfCameras) return NULL;
return &mClientLock[cameraId];
}
sp<CameraService::BasicClient> CameraService::getClientByRemote(
const wp<IBinder>& cameraClient) {
// Declare this before the lock to make absolutely sure the
// destructor won't be called with the lock held.
sp<BasicClient> client;
Mutex::Autolock lock(mServiceLock);
int outIndex;
client = findClientUnsafe(cameraClient, outIndex);
return client;
}
status_t CameraService::onTransact(
uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags) {
// Permission checks
switch (code) {
case BnCameraService::CONNECT:
case BnCameraService::CONNECT_PRO:
const int pid = getCallingPid();
const int self_pid = getpid();
if (pid != self_pid) {
// we're called from a different process, do the real check
if (!checkCallingPermission(
String16("android.permission.CAMERA"))) {
const int uid = getCallingUid();
ALOGE("Permission Denial: "
"can't use the camera pid=%d, uid=%d", pid, uid);
return PERMISSION_DENIED;
}
}
break;
}
return BnCameraService::onTransact(code, data, reply, flags);
}
// The reason we need this busy bit is a new CameraService::connect() request
// may come in while the previous Client's destructor has not been run or is
// still running. If the last strong reference of the previous Client is gone
// but the destructor has not been finished, we should not allow the new Client
// to be created because we need to wait for the previous Client to tear down
// the hardware first.
void CameraService::setCameraBusy(int cameraId) {
android_atomic_write(1, &mBusy[cameraId]);
ALOGV("setCameraBusy cameraId=%d", cameraId);
}
void CameraService::setCameraFree(int cameraId) {
android_atomic_write(0, &mBusy[cameraId]);
ALOGV("setCameraFree cameraId=%d", cameraId);
}
// We share the media players for shutter and recording sound for all clients.
// A reference count is kept to determine when we will actually release the
// media players.
MediaPlayer* CameraService::newMediaPlayer(const char *file) {
MediaPlayer* mp = new MediaPlayer();
if (mp->setDataSource(file, NULL) == NO_ERROR) {
mp->setAudioStreamType(AUDIO_STREAM_ENFORCED_AUDIBLE);
mp->prepare();
} else {
ALOGE("Failed to load CameraService sounds: %s", file);
return NULL;
}
return mp;
}
void CameraService::loadSound() {
Mutex::Autolock lock(mSoundLock);
LOG1("CameraService::loadSound ref=%d", mSoundRef);
if (mSoundRef++) return;
mSoundPlayer[SOUND_SHUTTER] = newMediaPlayer("/system/media/audio/ui/camera_click.ogg");
mSoundPlayer[SOUND_RECORDING] = newMediaPlayer("/system/media/audio/ui/VideoRecord.ogg");
}
void CameraService::releaseSound() {
Mutex::Autolock lock(mSoundLock);
LOG1("CameraService::releaseSound ref=%d", mSoundRef);
if (--mSoundRef) return;
for (int i = 0; i < NUM_SOUNDS; i++) {
if (mSoundPlayer[i] != 0) {
mSoundPlayer[i]->disconnect();
mSoundPlayer[i].clear();
}
}
}
void CameraService::playSound(sound_kind kind) {
LOG1("playSound(%d)", kind);
Mutex::Autolock lock(mSoundLock);
sp<MediaPlayer> player = mSoundPlayer[kind];
if (player != 0) {
player->seekTo(0);
player->start();
}
}
// ----------------------------------------------------------------------------
CameraService::Client::Client(const sp<CameraService>& cameraService,
const sp<ICameraClient>& cameraClient,
const String16& clientPackageName,
int cameraId, int cameraFacing,
int clientPid, uid_t clientUid,
int servicePid) :
CameraService::BasicClient(cameraService, cameraClient->asBinder(),
clientPackageName,
cameraId, cameraFacing,
clientPid, clientUid,
servicePid)
{
int callingPid = getCallingPid();
LOG1("Client::Client E (pid %d, id %d)", callingPid, cameraId);
mRemoteCallback = cameraClient;
cameraService->setCameraBusy(cameraId);
cameraService->loadSound();
LOG1("Client::Client X (pid %d, id %d)", callingPid, cameraId);
}
// tear down the client
CameraService::Client::~Client() {
ALOGV("~Client");
mDestructionStarted = true;
mCameraService->releaseSound();
// unconditionally disconnect. function is idempotent
Client::disconnect();
}
CameraService::BasicClient::BasicClient(const sp<CameraService>& cameraService,
const sp<IBinder>& remoteCallback,
const String16& clientPackageName,
int cameraId, int cameraFacing,
int clientPid, uid_t clientUid,
int servicePid):
mClientPackageName(clientPackageName)
{
mCameraService = cameraService;
mRemoteBinder = remoteCallback;
mCameraId = cameraId;
mCameraFacing = cameraFacing;
mClientPid = clientPid;
mClientUid = clientUid;
mServicePid = servicePid;
mOpsActive = false;
mDestructionStarted = false;
}
CameraService::BasicClient::~BasicClient() {
ALOGV("~BasicClient");
mDestructionStarted = true;
}
void CameraService::BasicClient::disconnect() {
ALOGV("BasicClient::disconnect");
mCameraService->removeClientByRemote(mRemoteBinder);
// client shouldn't be able to call into us anymore
mClientPid = 0;
}
status_t CameraService::BasicClient::startCameraOps() {
int32_t res;
mOpsCallback = new OpsCallback(this);
{
ALOGV("%s: Start camera ops, package name = %s, client UID = %d",
__FUNCTION__, String8(mClientPackageName).string(), mClientUid);
}
mAppOpsManager.startWatchingMode(AppOpsManager::OP_CAMERA,
mClientPackageName, mOpsCallback);
res = mAppOpsManager.startOp(AppOpsManager::OP_CAMERA,
mClientUid, mClientPackageName);
if (res != AppOpsManager::MODE_ALLOWED) {
ALOGI("Camera %d: Access for \"%s\" has been revoked",
mCameraId, String8(mClientPackageName).string());
return PERMISSION_DENIED;
}
mOpsActive = true;
return OK;
}
status_t CameraService::BasicClient::finishCameraOps() {
if (mOpsActive) {
mAppOpsManager.finishOp(AppOpsManager::OP_CAMERA, mClientUid,
mClientPackageName);
mOpsActive = false;
}
mAppOpsManager.stopWatchingMode(mOpsCallback);
mOpsCallback.clear();
return OK;
}
void CameraService::BasicClient::opChanged(int32_t op, const String16& packageName) {
String8 name(packageName);
String8 myName(mClientPackageName);
if (op != AppOpsManager::OP_CAMERA) {
ALOGW("Unexpected app ops notification received: %d", op);
return;
}
int32_t res;
res = mAppOpsManager.checkOp(AppOpsManager::OP_CAMERA,
mClientUid, mClientPackageName);
ALOGV("checkOp returns: %d, %s ", res,
res == AppOpsManager::MODE_ALLOWED ? "ALLOWED" :
res == AppOpsManager::MODE_IGNORED ? "IGNORED" :
res == AppOpsManager::MODE_ERRORED ? "ERRORED" :
"UNKNOWN");
if (res != AppOpsManager::MODE_ALLOWED) {
ALOGI("Camera %d: Access for \"%s\" revoked", mCameraId,
myName.string());
// Reset the client PID to allow server-initiated disconnect,
// and to prevent further calls by client.
mClientPid = getCallingPid();
notifyError();
disconnect();
}
}
// ----------------------------------------------------------------------------
Mutex* CameraService::Client::getClientLockFromCookie(void* user) {
return gCameraService->getClientLockById((int)(intptr_t) user);
}
// Provide client pointer for callbacks. Client lock returned from getClientLockFromCookie should
// be acquired for this to be safe
CameraService::Client* CameraService::Client::getClientFromCookie(void* user) {
BasicClient *basicClient = gCameraService->getClientByIdUnsafe((int)(intptr_t) user);
// OK: only CameraClient calls this, and they already cast anyway.
Client* client = static_cast<Client*>(basicClient);
// This could happen if the Client is in the process of shutting down (the
// last strong reference is gone, but the destructor hasn't finished
// stopping the hardware).
if (client == NULL) return NULL;
// destruction already started, so should not be accessed
if (client->mDestructionStarted) return NULL;
return client;
}
void CameraService::Client::notifyError() {
mRemoteCallback->notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_RELEASED, 0);
}
// NOTE: function is idempotent
void CameraService::Client::disconnect() {
ALOGV("Client::disconnect");
BasicClient::disconnect();
mCameraService->setCameraFree(mCameraId);
StatusVector rejectSourceStates;
rejectSourceStates.push_back(ICameraServiceListener::STATUS_NOT_PRESENT);
rejectSourceStates.push_back(ICameraServiceListener::STATUS_ENUMERATING);
// Transition to PRESENT if the camera is not in either of above 2 states
mCameraService->updateStatus(ICameraServiceListener::STATUS_PRESENT,
mCameraId,
&rejectSourceStates);
}
CameraService::Client::OpsCallback::OpsCallback(wp<BasicClient> client):
mClient(client) {
}
void CameraService::Client::OpsCallback::opChanged(int32_t op,
const String16& packageName) {
sp<BasicClient> client = mClient.promote();
if (client != NULL) {
client->opChanged(op, packageName);
}
}
// ----------------------------------------------------------------------------
// IProCamera
// ----------------------------------------------------------------------------
CameraService::ProClient::ProClient(const sp<CameraService>& cameraService,
const sp<IProCameraCallbacks>& remoteCallback,
const String16& clientPackageName,
int cameraId,
int cameraFacing,
int clientPid,
uid_t clientUid,
int servicePid)
: CameraService::BasicClient(cameraService, remoteCallback->asBinder(),
clientPackageName, cameraId, cameraFacing,
clientPid, clientUid, servicePid)
{
mRemoteCallback = remoteCallback;
}
CameraService::ProClient::~ProClient() {
}
void CameraService::ProClient::notifyError() {
mRemoteCallback->notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_RELEASED, 0);
}
// ----------------------------------------------------------------------------
static const int kDumpLockRetries = 50;
static const int kDumpLockSleep = 60000;
static bool tryLock(Mutex& mutex)
{
bool locked = false;
for (int i = 0; i < kDumpLockRetries; ++i) {
if (mutex.tryLock() == NO_ERROR) {
locked = true;
break;
}
usleep(kDumpLockSleep);
}
return locked;
}
status_t CameraService::dump(int fd, const Vector<String16>& args) {
String8 result;
if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
result.appendFormat("Permission Denial: "
"can't dump CameraService from pid=%d, uid=%d\n",
getCallingPid(),
getCallingUid());
write(fd, result.string(), result.size());
} else {
bool locked = tryLock(mServiceLock);
// failed to lock - CameraService is probably deadlocked
if (!locked) {
result.append("CameraService may be deadlocked\n");
write(fd, result.string(), result.size());
}
bool hasClient = false;
if (!mModule) {
result = String8::format("No camera module available!\n");
write(fd, result.string(), result.size());
return NO_ERROR;
}
result = String8::format("Camera module HAL API version: 0x%x\n",
mModule->common.hal_api_version);
result.appendFormat("Camera module API version: 0x%x\n",
mModule->common.module_api_version);
result.appendFormat("Camera module name: %s\n",
mModule->common.name);
result.appendFormat("Camera module author: %s\n",
mModule->common.author);
result.appendFormat("Number of camera devices: %d\n\n", mNumberOfCameras);
write(fd, result.string(), result.size());
for (int i = 0; i < mNumberOfCameras; i++) {
result = String8::format("Camera %d static information:\n", i);
camera_info info;
status_t rc = mModule->get_camera_info(i, &info);
if (rc != OK) {
result.appendFormat(" Error reading static information!\n");
write(fd, result.string(), result.size());
} else {
result.appendFormat(" Facing: %s\n",
info.facing == CAMERA_FACING_BACK ? "BACK" : "FRONT");
result.appendFormat(" Orientation: %d\n", info.orientation);
int deviceVersion;
if (mModule->common.module_api_version <
CAMERA_MODULE_API_VERSION_2_0) {
deviceVersion = CAMERA_DEVICE_API_VERSION_1_0;
} else {
deviceVersion = info.device_version;
}
result.appendFormat(" Device version: 0x%x\n", deviceVersion);
if (deviceVersion >= CAMERA_DEVICE_API_VERSION_2_0) {
result.appendFormat(" Device static metadata:\n");
write(fd, result.string(), result.size());
dump_indented_camera_metadata(info.static_camera_characteristics,
fd, 2, 4);
} else {
write(fd, result.string(), result.size());
}
}
sp<BasicClient> client = mClient[i].promote();
if (client == 0) {
result = String8::format(" Device is closed, no client instance\n");
write(fd, result.string(), result.size());
continue;
}
hasClient = true;
result = String8::format(" Device is open. Client instance dump:\n");
write(fd, result.string(), result.size());
client->dump(fd, args);
}
if (!hasClient) {
result = String8::format("\nNo active camera clients yet.\n");
write(fd, result.string(), result.size());
}
if (locked) mServiceLock.unlock();
// Dump camera traces if there were any
write(fd, "\n", 1);
camera3::CameraTraces::dump(fd, args);
// change logging level
int n = args.size();
for (int i = 0; i + 1 < n; i++) {
String16 verboseOption("-v");
if (args[i] == verboseOption) {
String8 levelStr(args[i+1]);
int level = atoi(levelStr.string());
result = String8::format("\nSetting log level to %d.\n", level);
setLogLevel(level);
write(fd, result.string(), result.size());
}
}
}
return NO_ERROR;
}
/*virtual*/void CameraService::binderDied(
const wp<IBinder> &who) {
/**
* While tempting to promote the wp<IBinder> into a sp,
* it's actually not supported by the binder driver
*/
ALOGV("java clients' binder died");
sp<BasicClient> cameraClient = getClientByRemote(who);
if (cameraClient == 0) {
ALOGV("java clients' binder death already cleaned up (normal case)");
return;
}
ALOGW("Disconnecting camera client %p since the binder for it "
"died (this pid %d)", cameraClient.get(), getCallingPid());
cameraClient->disconnect();
}
void CameraService::updateStatus(ICameraServiceListener::Status status,
int32_t cameraId,
const StatusVector *rejectSourceStates) {
// do not lock mServiceLock here or can get into a deadlock from
// connect() -> ProClient::disconnect -> updateStatus
Mutex::Autolock lock(mStatusMutex);
ICameraServiceListener::Status oldStatus = mStatusList[cameraId];
mStatusList[cameraId] = status;
if (oldStatus != status) {
ALOGV("%s: Status has changed for camera ID %d from 0x%x to 0x%x",
__FUNCTION__, cameraId, (uint32_t)oldStatus, (uint32_t)status);
if (oldStatus == ICameraServiceListener::STATUS_NOT_PRESENT &&
(status != ICameraServiceListener::STATUS_PRESENT &&
status != ICameraServiceListener::STATUS_ENUMERATING)) {
ALOGW("%s: From NOT_PRESENT can only transition into PRESENT"
" or ENUMERATING", __FUNCTION__);
mStatusList[cameraId] = oldStatus;
return;
}
if (rejectSourceStates != NULL) {
const StatusVector &rejectList = *rejectSourceStates;
StatusVector::const_iterator it = rejectList.begin();
/**
* Sometimes we want to conditionally do a transition.
* For example if a client disconnects, we want to go to PRESENT
* only if we weren't already in NOT_PRESENT or ENUMERATING.
*/
for (; it != rejectList.end(); ++it) {
if (oldStatus == *it) {
ALOGV("%s: Rejecting status transition for Camera ID %d, "
" since the source state was was in one of the bad "
" states.", __FUNCTION__, cameraId);
mStatusList[cameraId] = oldStatus;
return;
}
}
}
/**
* ProClients lose their exclusive lock.
* - Done before the CameraClient can initialize the HAL device,
* since we want to be able to close it before they get to initialize
*/
if (status == ICameraServiceListener::STATUS_NOT_AVAILABLE) {
Vector<wp<ProClient> > proClients(mProClientList[cameraId]);
Vector<wp<ProClient> >::const_iterator it;
for (it = proClients.begin(); it != proClients.end(); ++it) {
sp<ProClient> proCl = it->promote();
if (proCl.get() != NULL) {
proCl->onExclusiveLockStolen();
}
}
}
Vector<sp<ICameraServiceListener> >::const_iterator it;
for (it = mListenerList.begin(); it != mListenerList.end(); ++it) {
(*it)->onStatusChanged(status, cameraId);
}
}
}
ICameraServiceListener::Status CameraService::getStatus(int cameraId) const {
if (cameraId < 0 || cameraId >= MAX_CAMERAS) {
ALOGE("%s: Invalid camera ID %d", __FUNCTION__, cameraId);
return ICameraServiceListener::STATUS_UNKNOWN;
}
Mutex::Autolock al(mStatusMutex);
return mStatusList[cameraId];
}
}; // namespace android
|