summaryrefslogtreecommitdiffstats
path: root/dom/media/gmp/ChromiumCDMParent.cpp
blob: b2465f611e98aff92d202af9df333502d2388ab2 (plain)
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
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "ChromiumCDMParent.h"

#include "ChromiumCDMCallback.h"
#include "ChromiumCDMCallbackProxy.h"
#include "ChromiumCDMProxy.h"
#include "content_decryption_module.h"
#include "GMPContentChild.h"
#include "GMPContentParent.h"
#include "GMPLog.h"
#include "GMPService.h"
#include "GMPUtils.h"
#include "VideoUtils.h"
#include "mozilla/dom/MediaKeyMessageEventBinding.h"
#include "mozilla/gmp/GMPTypes.h"
#include "mozilla/ScopeExit.h"
#include "mozilla/StaticPrefs_media.h"
#include "mozilla/Unused.h"
#include "AnnexB.h"
#include "H264.h"

#define NS_DispatchToMainThread(...) CompileError_UseAbstractMainThreadInstead

namespace mozilla::gmp {

using namespace eme;

ChromiumCDMParent::ChromiumCDMParent(GMPContentParent* aContentParent,
                                     uint32_t aPluginId)
    : mPluginId(aPluginId),
      mContentParent(aContentParent),
      mVideoShmemLimit(StaticPrefs::media_eme_chromium_api_video_shmems())
#ifdef DEBUG
      ,
      mGMPThread(aContentParent->GMPEventTarget())
#endif
{
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG(
      "ChromiumCDMParent::ChromiumCDMParent(this=%p, contentParent=%p, "
      "id=%" PRIu32 ")",
      this, aContentParent, aPluginId);
}

RefPtr<ChromiumCDMParent::InitPromise> ChromiumCDMParent::Init(
    ChromiumCDMCallback* aCDMCallback, bool aAllowDistinctiveIdentifier,
    bool aAllowPersistentState, nsIEventTarget* aMainThread) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG(
      "ChromiumCDMParent::Init(this=%p) shutdown=%s abormalShutdown=%s "
      "actorDestroyed=%s",
      this, mIsShutdown ? "true" : "false",
      mAbnormalShutdown ? "true" : "false", mActorDestroyed ? "true" : "false");
  if (!aCDMCallback || !aMainThread) {
    GMP_LOG_DEBUG(
        "ChromiumCDMParent::Init(this=%p) failed "
        "nullCallback=%s nullMainThread=%s",
        this, !aCDMCallback ? "true" : "false",
        !aMainThread ? "true" : "false");

    return ChromiumCDMParent::InitPromise::CreateAndReject(
        MediaResult(NS_ERROR_FAILURE,
                    nsPrintfCString("ChromiumCDMParent::Init() failed "
                                    "nullCallback=%s nullMainThread=%s",
                                    !aCDMCallback ? "true" : "false",
                                    !aMainThread ? "true" : "false")),
        __func__);
  }

  RefPtr<ChromiumCDMParent::InitPromise> promise =
      mInitPromise.Ensure(__func__);
  RefPtr<ChromiumCDMParent> self = this;
  SendInit(aAllowDistinctiveIdentifier, aAllowPersistentState)
      ->Then(
          GetCurrentSerialEventTarget(), __func__,
          [self, aCDMCallback](bool aSuccess) {
            if (!aSuccess) {
              GMP_LOG_DEBUG(
                  "ChromiumCDMParent::Init() failed with callback from "
                  "child indicating CDM failed init");
              self->mInitPromise.RejectIfExists(
                  MediaResult(NS_ERROR_FAILURE,
                              "ChromiumCDMParent::Init() failed with callback "
                              "from child indicating CDM failed init"),
                  __func__);
              return;
            }
            GMP_LOG_DEBUG(
                "ChromiumCDMParent::Init() succeeded with callback from child");
            self->mCDMCallback = aCDMCallback;
            self->mInitPromise.ResolveIfExists(true /* unused */, __func__);
          },
          [self](ResponseRejectReason&& aReason) {
            RefPtr<gmp::GeckoMediaPluginService> service =
                gmp::GeckoMediaPluginService::GetGeckoMediaPluginService();
            bool xpcomWillShutdown =
                service && service->XPCOMWillShutdownReceived();
            GMP_LOG_DEBUG(
                "ChromiumCDMParent::Init(this=%p) failed "
                "shutdown=%s cdmCrash=%s actorDestroyed=%s "
                "browserShutdown=%s promiseRejectReason=%d",
                self.get(), self->mIsShutdown ? "true" : "false",
                self->mAbnormalShutdown ? "true" : "false",
                self->mActorDestroyed ? "true" : "false",
                xpcomWillShutdown ? "true" : "false",
                static_cast<int>(aReason));
            self->mInitPromise.RejectIfExists(
                MediaResult(
                    NS_ERROR_FAILURE,
                    nsPrintfCString("ChromiumCDMParent::Init() failed "
                                    "shutdown=%s cdmCrash=%s actorDestroyed=%s "
                                    "browserShutdown=%s promiseRejectReason=%d",
                                    self->mIsShutdown ? "true" : "false",
                                    self->mAbnormalShutdown ? "true" : "false",
                                    self->mActorDestroyed ? "true" : "false",
                                    xpcomWillShutdown ? "true" : "false",
                                    static_cast<int>(aReason))),
                __func__);
          });
  return promise;
}

void ChromiumCDMParent::CreateSession(uint32_t aCreateSessionToken,
                                      uint32_t aSessionType,
                                      uint32_t aInitDataType,
                                      uint32_t aPromiseId,
                                      const nsTArray<uint8_t>& aInitData) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG("ChromiumCDMParent::CreateSession(this=%p)", this);
  if (mIsShutdown) {
    RejectPromiseShutdown(aPromiseId);
    return;
  }
  if (!SendCreateSessionAndGenerateRequest(aPromiseId, aSessionType,
                                           aInitDataType, aInitData)) {
    RejectPromiseWithStateError(
        aPromiseId, "Failed to send generateRequest to CDM process."_ns);
    return;
  }
  mPromiseToCreateSessionToken.InsertOrUpdate(aPromiseId, aCreateSessionToken);
}

void ChromiumCDMParent::LoadSession(uint32_t aPromiseId, uint32_t aSessionType,
                                    nsString aSessionId) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG("ChromiumCDMParent::LoadSession(this=%p, pid=%" PRIu32
                ", type=%" PRIu32 ", sid=%s)",
                this, aPromiseId, aSessionType,
                NS_ConvertUTF16toUTF8(aSessionId).get());
  if (mIsShutdown) {
    RejectPromiseShutdown(aPromiseId);
    return;
  }
  if (!SendLoadSession(aPromiseId, aSessionType,
                       NS_ConvertUTF16toUTF8(aSessionId))) {
    RejectPromiseWithStateError(
        aPromiseId, "Failed to send loadSession to CDM process."_ns);
    return;
  }
}

void ChromiumCDMParent::SetServerCertificate(uint32_t aPromiseId,
                                             const nsTArray<uint8_t>& aCert) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG("ChromiumCDMParent::SetServerCertificate(this=%p)", this);
  if (mIsShutdown) {
    RejectPromiseShutdown(aPromiseId);
    return;
  }
  if (!SendSetServerCertificate(aPromiseId, aCert)) {
    RejectPromiseWithStateError(
        aPromiseId, "Failed to send setServerCertificate to CDM process"_ns);
  }
}

void ChromiumCDMParent::UpdateSession(const nsCString& aSessionId,
                                      uint32_t aPromiseId,
                                      const nsTArray<uint8_t>& aResponse) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG("ChromiumCDMParent::UpdateSession(this=%p)", this);
  if (mIsShutdown) {
    RejectPromiseShutdown(aPromiseId);
    return;
  }
  if (!SendUpdateSession(aPromiseId, aSessionId, aResponse)) {
    RejectPromiseWithStateError(
        aPromiseId, "Failed to send updateSession to CDM process"_ns);
  }
}

void ChromiumCDMParent::CloseSession(const nsCString& aSessionId,
                                     uint32_t aPromiseId) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG("ChromiumCDMParent::CloseSession(this=%p)", this);
  if (mIsShutdown) {
    RejectPromiseShutdown(aPromiseId);
    return;
  }
  if (!SendCloseSession(aPromiseId, aSessionId)) {
    RejectPromiseWithStateError(
        aPromiseId, "Failed to send closeSession to CDM process"_ns);
  }
}

void ChromiumCDMParent::RemoveSession(const nsCString& aSessionId,
                                      uint32_t aPromiseId) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG("ChromiumCDMParent::RemoveSession(this=%p)", this);
  if (mIsShutdown) {
    RejectPromiseShutdown(aPromiseId);
    return;
  }
  if (!SendRemoveSession(aPromiseId, aSessionId)) {
    RejectPromiseWithStateError(
        aPromiseId, "Failed to send removeSession to CDM process"_ns);
  }
}

void ChromiumCDMParent::NotifyOutputProtectionStatus(bool aSuccess,
                                                     uint32_t aLinkMask,
                                                     uint32_t aProtectionMask) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG("ChromiumCDMParent::NotifyOutputProtectionStatus(this=%p)",
                this);
  if (mIsShutdown) {
    return;
  }
  const bool haveCachedValue = mOutputProtectionLinkMask.isSome();
  if (mAwaitingOutputProtectionInformation && !aSuccess) {
    MOZ_DIAGNOSTIC_ASSERT(
        !haveCachedValue,
        "Should not have a cached value if we're still awaiting infomation");
    // We're awaiting info and don't yet have a cached value, and the check
    // failed, don't cache the result, just forward the failure.
    CompleteQueryOutputProtectionStatus(false, aLinkMask, aProtectionMask);
    return;
  }
  if (!mAwaitingOutputProtectionInformation && haveCachedValue && !aSuccess) {
    // We're not awaiting info, already have a cached value, and the check
    // failed. Ignore this, we'll update our info from any future successful
    // checks.
    return;
  }
  MOZ_ASSERT(aSuccess, "Failed checks should be handled by this point");
  // Update our protection information.
  mOutputProtectionLinkMask = Some(aLinkMask);

  if (mAwaitingOutputProtectionInformation) {
    // If we have an outstanding query, service that query with this
    // information.
    mAwaitingOutputProtectionInformation = false;
    MOZ_ASSERT(!haveCachedValue,
               "If we were waiting on information, we shouldn't have yet "
               "cached a value");
    CompleteQueryOutputProtectionStatus(true, mOutputProtectionLinkMask.value(),
                                        aProtectionMask);
  }
}

void ChromiumCDMParent::CompleteQueryOutputProtectionStatus(
    bool aSuccess, uint32_t aLinkMask, uint32_t aProtectionMask) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG(
      "ChromiumCDMParent::CompleteQueryOutputProtectionStatus(this=%p) "
      "mIsShutdown=%s aSuccess=%s aLinkMask=%" PRIu32,
      this, mIsShutdown ? "true" : "false", aSuccess ? "true" : "false",
      aLinkMask);
  if (mIsShutdown) {
    return;
  }
  Unused << SendCompleteQueryOutputProtectionStatus(aSuccess, aLinkMask,
                                                    aProtectionMask);
}

static cdm::HdcpVersion ToCDMHdcpVersion(
    const dom::HDCPVersion& aMinHdcpVersion) {
  switch (aMinHdcpVersion) {
    case dom::HDCPVersion::_1_0:
      return cdm::HdcpVersion::kHdcpVersion1_0;
    case dom::HDCPVersion::_1_1:
      return cdm::HdcpVersion::kHdcpVersion1_1;
    case dom::HDCPVersion::_1_2:
      return cdm::HdcpVersion::kHdcpVersion1_2;
    case dom::HDCPVersion::_1_3:
      return cdm::HdcpVersion::kHdcpVersion1_3;
    case dom::HDCPVersion::_1_4:
      return cdm::HdcpVersion::kHdcpVersion1_4;
    case dom::HDCPVersion::_2_0:
      return cdm::HdcpVersion::kHdcpVersion2_0;
    case dom::HDCPVersion::_2_1:
      return cdm::HdcpVersion::kHdcpVersion2_1;
    case dom::HDCPVersion::_2_2:
      return cdm::HdcpVersion::kHdcpVersion2_2;
    case dom::HDCPVersion::_2_3:
      return cdm::HdcpVersion::kHdcpVersion2_3;
    // When adding another version remember to update GMPMessageUtils so that we
    // can serialize it correctly and have correct bounds on the enum!
    default:
      MOZ_ASSERT_UNREACHABLE("Unexpected HDCP version!");
      return cdm::HdcpVersion::kHdcpVersionNone;
  }
}

void ChromiumCDMParent::GetStatusForPolicy(
    uint32_t aPromiseId, const dom::HDCPVersion& aMinHdcpVersion) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG("ChromiumCDMParent::GetStatusForPolicy(this=%p)", this);
  if (mIsShutdown) {
    RejectPromiseShutdown(aPromiseId);
    return;
  }
  if (!SendGetStatusForPolicy(aPromiseId, ToCDMHdcpVersion(aMinHdcpVersion))) {
    RejectPromiseWithStateError(
        aPromiseId, "Failed to send getStatusForPolicy to CDM process"_ns);
  }
}

bool ChromiumCDMParent::InitCDMInputBuffer(gmp::CDMInputBuffer& aBuffer,
                                           MediaRawData* aSample) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  const CryptoSample& crypto = aSample->mCrypto;
  if (crypto.mEncryptedSizes.Length() != crypto.mPlainSizes.Length()) {
    GMP_LOG_DEBUG("InitCDMInputBuffer clear/cipher subsamples don't match");
    return false;
  }

  Shmem shmem;
  if (!AllocShmem(aSample->Size(), &shmem)) {
    return false;
  }
  memcpy(shmem.get<uint8_t>(), aSample->Data(), aSample->Size());
  cdm::EncryptionScheme encryptionScheme = cdm::EncryptionScheme::kUnencrypted;
  switch (crypto.mCryptoScheme) {
    case CryptoScheme::None:
      break;  // Default to none
    case CryptoScheme::Cenc:
      encryptionScheme = cdm::EncryptionScheme::kCenc;
      break;
    case CryptoScheme::Cbcs:
      encryptionScheme = cdm::EncryptionScheme::kCbcs;
      break;
    default:
      GMP_LOG_DEBUG(
          "InitCDMInputBuffer got unexpected encryption scheme with "
          "value of %" PRIu8 ". Treating as no encryption.",
          static_cast<uint8_t>(crypto.mCryptoScheme));
      MOZ_ASSERT_UNREACHABLE("Should not have unrecognized encryption type");
      break;
  }

  const nsTArray<uint8_t>& iv = encryptionScheme != cdm::EncryptionScheme::kCbcs
                                    ? crypto.mIV
                                    : crypto.mConstantIV;
  aBuffer = gmp::CDMInputBuffer(
      shmem, crypto.mKeyId, iv, aSample->mTime.ToMicroseconds(),
      aSample->mDuration.ToMicroseconds(), crypto.mPlainSizes,
      crypto.mEncryptedSizes, crypto.mCryptByteBlock, crypto.mSkipByteBlock,
      encryptionScheme);
  return true;
}

bool ChromiumCDMParent::SendBufferToCDM(uint32_t aSizeInBytes) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG("ChromiumCDMParent::SendBufferToCDM() size=%" PRIu32,
                aSizeInBytes);
  Shmem shmem;
  if (!AllocShmem(aSizeInBytes, &shmem)) {
    return false;
  }
  if (!SendGiveBuffer(std::move(shmem))) {
    DeallocShmem(shmem);
    return false;
  }
  return true;
}

RefPtr<DecryptPromise> ChromiumCDMParent::Decrypt(MediaRawData* aSample) {
  if (mIsShutdown) {
    MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
    return DecryptPromise::CreateAndReject(DecryptResult(GenericErr, aSample),
                                           __func__);
  }
  CDMInputBuffer buffer;
  if (!InitCDMInputBuffer(buffer, aSample)) {
    return DecryptPromise::CreateAndReject(DecryptResult(GenericErr, aSample),
                                           __func__);
  }
  // Send a buffer to the CDM to store the output. The CDM will either fill
  // it with the decrypted sample and return it, or deallocate it on failure.
  if (!SendBufferToCDM(aSample->Size())) {
    DeallocShmem(buffer.mData());
    return DecryptPromise::CreateAndReject(DecryptResult(GenericErr, aSample),
                                           __func__);
  }

  RefPtr<DecryptJob> job = new DecryptJob(aSample);
  if (!SendDecrypt(job->mId, buffer)) {
    GMP_LOG_DEBUG(
        "ChromiumCDMParent::Decrypt(this=%p) failed to send decrypt message",
        this);
    DeallocShmem(buffer.mData());
    return DecryptPromise::CreateAndReject(DecryptResult(GenericErr, aSample),
                                           __func__);
  }
  RefPtr<DecryptPromise> promise = job->Ensure();
  mDecrypts.AppendElement(job);
  return promise;
}

ipc::IPCResult ChromiumCDMParent::Recv__delete__() {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  MOZ_ASSERT(mIsShutdown);
  GMP_LOG_DEBUG("ChromiumCDMParent::Recv__delete__(this=%p)", this);
  if (mContentParent) {
    mContentParent->ChromiumCDMDestroyed(this);
    mContentParent = nullptr;
  }
  return IPC_OK();
}

ipc::IPCResult ChromiumCDMParent::RecvOnResolvePromiseWithKeyStatus(
    const uint32_t& aPromiseId, const uint32_t& aKeyStatus) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG(
      "ChromiumCDMParent::RecvOnResolvePromiseWithKeyStatus(this=%p, "
      "pid=%" PRIu32 ", keystatus=%" PRIu32 ")",
      this, aPromiseId, aKeyStatus);
  if (!mCDMCallback || mIsShutdown) {
    return IPC_OK();
  }

  mCDMCallback->ResolvePromiseWithKeyStatus(aPromiseId, aKeyStatus);

  return IPC_OK();
}

ipc::IPCResult ChromiumCDMParent::RecvOnResolveNewSessionPromise(
    const uint32_t& aPromiseId, const nsCString& aSessionId) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG(
      "ChromiumCDMParent::RecvOnResolveNewSessionPromise(this=%p, pid=%" PRIu32
      ", sid=%s)",
      this, aPromiseId, aSessionId.get());
  if (!mCDMCallback || mIsShutdown) {
    return IPC_OK();
  }

  Maybe<uint32_t> token = mPromiseToCreateSessionToken.Extract(aPromiseId);
  if (token.isNothing()) {
    RejectPromiseWithStateError(aPromiseId,
                                "Lost session token for new session."_ns);
    return IPC_OK();
  }

  mCDMCallback->SetSessionId(token.value(), aSessionId);

  ResolvePromise(aPromiseId);

  return IPC_OK();
}

ipc::IPCResult ChromiumCDMParent::RecvResolveLoadSessionPromise(
    const uint32_t& aPromiseId, const bool& aSuccessful) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG(
      "ChromiumCDMParent::RecvResolveLoadSessionPromise(this=%p, pid=%" PRIu32
      ", successful=%d)",
      this, aPromiseId, aSuccessful);
  if (!mCDMCallback || mIsShutdown) {
    return IPC_OK();
  }

  mCDMCallback->ResolveLoadSessionPromise(aPromiseId, aSuccessful);

  return IPC_OK();
}

void ChromiumCDMParent::ResolvePromise(uint32_t aPromiseId) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG("ChromiumCDMParent::ResolvePromise(this=%p, pid=%" PRIu32 ")",
                this, aPromiseId);

  // Note: The MediaKeys rejects all pending DOM promises when it
  // initiates shutdown.
  if (!mCDMCallback || mIsShutdown) {
    return;
  }

  mCDMCallback->ResolvePromise(aPromiseId);
}

ipc::IPCResult ChromiumCDMParent::RecvOnResolvePromise(
    const uint32_t& aPromiseId) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  ResolvePromise(aPromiseId);
  return IPC_OK();
}

void ChromiumCDMParent::RejectPromise(uint32_t aPromiseId,
                                      ErrorResult&& aException,
                                      const nsCString& aErrorMessage) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG("ChromiumCDMParent::RejectPromise(this=%p, pid=%" PRIu32 ")",
                this, aPromiseId);
  // Note: The MediaKeys rejects all pending DOM promises when it
  // initiates shutdown.
  if (!mCDMCallback || mIsShutdown) {
    // Suppress the exception as it will not be explicitly handled due to the
    // early return.
    aException.SuppressException();
    return;
  }

  mCDMCallback->RejectPromise(aPromiseId, std::move(aException), aErrorMessage);
}

void ChromiumCDMParent::RejectPromiseShutdown(uint32_t aPromiseId) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  RejectPromiseWithStateError(aPromiseId, "CDM is shutdown"_ns);
}

void ChromiumCDMParent::RejectPromiseWithStateError(
    uint32_t aPromiseId, const nsCString& aErrorMessage) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  ErrorResult rv;
  rv.ThrowInvalidStateError(aErrorMessage);
  RejectPromise(aPromiseId, std::move(rv), aErrorMessage);
}

static ErrorResult ToErrorResult(uint32_t aException,
                                 const nsCString& aErrorMessage) {
  // XXXbz could we have a CopyableErrorResult sent to us with a better error
  // message?
  ErrorResult rv;
  switch (static_cast<cdm::Exception>(aException)) {
    case cdm::Exception::kExceptionNotSupportedError:
      rv.ThrowNotSupportedError(aErrorMessage);
      break;
    case cdm::Exception::kExceptionInvalidStateError:
      rv.ThrowInvalidStateError(aErrorMessage);
      break;
    case cdm::Exception::kExceptionTypeError:
      rv.ThrowTypeError(aErrorMessage);
      break;
    case cdm::Exception::kExceptionQuotaExceededError:
      rv.ThrowQuotaExceededError(aErrorMessage);
      break;
    default:
      MOZ_ASSERT_UNREACHABLE("Invalid cdm::Exception enum value.");
      // Note: Unique placeholder.
      rv.ThrowTimeoutError(aErrorMessage);
  };
  return rv;
}

ipc::IPCResult ChromiumCDMParent::RecvOnRejectPromise(
    const uint32_t& aPromiseId, const uint32_t& aException,
    const uint32_t& aSystemCode, const nsCString& aErrorMessage) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  RejectPromise(aPromiseId, ToErrorResult(aException, aErrorMessage),
                aErrorMessage);
  return IPC_OK();
}

ipc::IPCResult ChromiumCDMParent::RecvOnSessionMessage(
    const nsCString& aSessionId, const uint32_t& aMessageType,
    nsTArray<uint8_t>&& aMessage) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG("ChromiumCDMParent::RecvOnSessionMessage(this=%p, sid=%s)",
                this, aSessionId.get());
  if (!mCDMCallback || mIsShutdown) {
    return IPC_OK();
  }

  mCDMCallback->SessionMessage(aSessionId, aMessageType, std::move(aMessage));
  return IPC_OK();
}

ipc::IPCResult ChromiumCDMParent::RecvOnSessionKeysChange(
    const nsCString& aSessionId, nsTArray<CDMKeyInformation>&& aKeysInfo) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG("ChromiumCDMParent::RecvOnSessionKeysChange(this=%p)", this);
  if (!mCDMCallback || mIsShutdown) {
    return IPC_OK();
  }

  mCDMCallback->SessionKeysChange(aSessionId, std::move(aKeysInfo));
  return IPC_OK();
}

ipc::IPCResult ChromiumCDMParent::RecvOnExpirationChange(
    const nsCString& aSessionId, const double& aSecondsSinceEpoch) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG("ChromiumCDMParent::RecvOnExpirationChange(this=%p) time=%lf",
                this, aSecondsSinceEpoch);
  if (!mCDMCallback || mIsShutdown) {
    return IPC_OK();
  }

  mCDMCallback->ExpirationChange(aSessionId, aSecondsSinceEpoch);
  return IPC_OK();
}

ipc::IPCResult ChromiumCDMParent::RecvOnSessionClosed(
    const nsCString& aSessionId) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG("ChromiumCDMParent::RecvOnSessionClosed(this=%p)", this);
  if (!mCDMCallback || mIsShutdown) {
    return IPC_OK();
  }

  mCDMCallback->SessionClosed(aSessionId);
  return IPC_OK();
}

ipc::IPCResult ChromiumCDMParent::RecvOnQueryOutputProtectionStatus() {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG(
      "ChromiumCDMParent::RecvOnQueryOutputProtectionStatus(this=%p) "
      "mIsShutdown=%s mCDMCallback=%s mAwaitingOutputProtectionInformation=%s",
      this, mIsShutdown ? "true" : "false", mCDMCallback ? "true" : "false",
      mAwaitingOutputProtectionInformation ? "true" : "false");
  if (mIsShutdown) {
    // We're shutdown, don't try to service the query.
    return IPC_OK();
  }
  if (!mCDMCallback) {
    // We don't have a callback. We're not yet outputting anything so can report
    // we're safe.
    CompleteQueryOutputProtectionStatus(true, uint32_t{}, uint32_t{});
    return IPC_OK();
  }

  if (mOutputProtectionLinkMask.isSome()) {
    MOZ_DIAGNOSTIC_ASSERT(
        !mAwaitingOutputProtectionInformation,
        "If we have a cached value we should not be awaiting information");
    // We have a cached value, use that.
    CompleteQueryOutputProtectionStatus(true, mOutputProtectionLinkMask.value(),
                                        uint32_t{});
    return IPC_OK();
  }

  // We need to call up the stack to get the info. The CDM proxy will finish
  // the request via `NotifyOutputProtectionStatus`.
  mAwaitingOutputProtectionInformation = true;
  mCDMCallback->QueryOutputProtectionStatus();
  return IPC_OK();
}

DecryptStatus ToDecryptStatus(uint32_t aStatus) {
  switch (static_cast<cdm::Status>(aStatus)) {
    case cdm::kSuccess:
      return DecryptStatus::Ok;
    case cdm::kNoKey:
      return DecryptStatus::NoKeyErr;
    default:
      return DecryptStatus::GenericErr;
  }
}

ipc::IPCResult ChromiumCDMParent::RecvDecryptFailed(const uint32_t& aId,
                                                    const uint32_t& aStatus) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG("ChromiumCDMParent::RecvDecryptFailed(this=%p, id=%" PRIu32
                ", status=%" PRIu32 ")",
                this, aId, aStatus);

  if (mIsShutdown) {
    MOZ_ASSERT(mDecrypts.IsEmpty());
    return IPC_OK();
  }

  for (size_t i = 0; i < mDecrypts.Length(); i++) {
    if (mDecrypts[i]->mId == aId) {
      mDecrypts[i]->PostResult(ToDecryptStatus(aStatus));
      mDecrypts.RemoveElementAt(i);
      break;
    }
  }
  return IPC_OK();
}

ipc::IPCResult ChromiumCDMParent::RecvDecrypted(const uint32_t& aId,
                                                const uint32_t& aStatus,
                                                ipc::Shmem&& aShmem) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG("ChromiumCDMParent::RecvDecrypted(this=%p, id=%" PRIu32
                ", status=%" PRIu32 ")",
                this, aId, aStatus);

  // We must deallocate the shmem once we've copied the result out of it
  // in PostResult below.
  auto autoDeallocateShmem = MakeScopeExit([&, this] { DeallocShmem(aShmem); });

  if (mIsShutdown) {
    MOZ_ASSERT(mDecrypts.IsEmpty());
    return IPC_OK();
  }
  for (size_t i = 0; i < mDecrypts.Length(); i++) {
    if (mDecrypts[i]->mId == aId) {
      mDecrypts[i]->PostResult(
          ToDecryptStatus(aStatus),
          Span<const uint8_t>(aShmem.get<uint8_t>(), aShmem.Size<uint8_t>()));
      mDecrypts.RemoveElementAt(i);
      break;
    }
  }
  return IPC_OK();
}

ipc::IPCResult ChromiumCDMParent::RecvIncreaseShmemPoolSize() {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG("%s(this=%p) limit=%" PRIu32 " active=%" PRIu32, __func__, this,
                mVideoShmemLimit, mVideoShmemsActive);

  // Put an upper limit on the number of shmems we tolerate the CDM asking
  // for, to prevent a memory blow-out. In practice, we expect the CDM to
  // need less than 5, but some encodings require more.
  // We'd expect CDMs to not have video frames larger than 720p-1080p
  // (due to DRM robustness requirements), which is about 1.5MB-3MB per
  // frame.
  if (mVideoShmemLimit > 50) {
    mDecodePromise.RejectIfExists(
        MediaResult(NS_ERROR_DOM_MEDIA_FATAL_ERR,
                    RESULT_DETAIL("Failled to ensure CDM has enough shmems.")),
        __func__);
    Shutdown();
    return IPC_OK();
  }
  mVideoShmemLimit++;

  EnsureSufficientShmems(mVideoFrameBufferSize);

  return IPC_OK();
}

bool ChromiumCDMParent::PurgeShmems() {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG(
      "ChromiumCDMParent::PurgeShmems(this=%p) frame_size=%zu"
      " limit=%" PRIu32 " active=%" PRIu32,
      this, mVideoFrameBufferSize, mVideoShmemLimit, mVideoShmemsActive);

  if (mVideoShmemsActive == 0) {
    // We haven't allocated any shmems, nothing to do here.
    return true;
  }
  if (!SendPurgeShmems()) {
    return false;
  }
  mVideoShmemsActive = 0;
  return true;
}

bool ChromiumCDMParent::EnsureSufficientShmems(size_t aVideoFrameSize) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG(
      "ChromiumCDMParent::EnsureSufficientShmems(this=%p) "
      "size=%zu expected_size=%zu limit=%" PRIu32 " active=%" PRIu32,
      this, aVideoFrameSize, mVideoFrameBufferSize, mVideoShmemLimit,
      mVideoShmemsActive);

  // The Chromium CDM API requires us to implement a synchronous
  // interface to supply buffers to the CDM for it to write decrypted samples
  // into. We want our buffers to be backed by shmems, in order to reduce
  // the overhead of transferring decoded frames. However due to sandboxing
  // restrictions, the CDM process cannot allocate shmems itself.
  // We don't want to be doing synchronous IPC to request shmems from the
  // content process, nor do we want to have to do intr IPC or make async
  // IPC conform to the sync allocation interface. So instead we have the
  // content process pre-allocate a set of shmems and give them to the CDM
  // process in advance of them being needed.
  //
  // When the CDM needs to allocate a buffer for storing a decoded video
  // frame, the CDM host gives it one of these shmems' buffers. When this
  // is sent back to the content process, we upload it to a GPU surface,
  // and send the shmem back to the CDM process so it can reuse it.
  //
  // Normally the CDM won't allocate more than one buffer at once, but
  // we've seen cases where it allocates multiple buffers, returns one and
  // holds onto the rest. So we need to ensure we have several extra
  // shmems pre-allocated for the CDM. This threshold is set by the pref
  // media.eme.chromium-api.video-shmems.
  //
  // We also have a failure recovery mechanism; if the CDM asks for more
  // buffers than we have shmem's available, ChromiumCDMChild gives the
  // CDM a non-shared memory buffer, and returns the frame to the parent
  // in an nsTArray<uint8_t> instead of a shmem. The child then sends a
  // message to the parent asking it to increase the number of shmems in
  // the pool. Via this mechanism we should recover from incorrectly
  // predicting how many shmems to pre-allocate.
  //
  // At decoder start up, we guess how big the shmems need to be based on
  // the video frame dimensions. If we guess wrong, the CDM will follow
  // the non-shmem path, and we'll re-create the shmems of the correct size.
  // This meanns we can recover from guessing the shmem size wrong.
  // We must re-take this path after every decoder de-init/re-init, as the
  // frame sizes should change every time we switch video stream.

  if (mVideoFrameBufferSize < aVideoFrameSize) {
    if (!PurgeShmems()) {
      return false;
    }
    mVideoFrameBufferSize = aVideoFrameSize;
  }

  while (mVideoShmemsActive < mVideoShmemLimit) {
    if (!SendBufferToCDM(mVideoFrameBufferSize)) {
      return false;
    }
    mVideoShmemsActive++;
  }

  return true;
}

ipc::IPCResult ChromiumCDMParent::RecvDecodedData(const CDMVideoFrame& aFrame,
                                                  nsTArray<uint8_t>&& aData) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG("ChromiumCDMParent::RecvDecodedData(this=%p) time=%" PRId64,
                this, aFrame.mTimestamp());

  if (mIsShutdown || mDecodePromise.IsEmpty()) {
    return IPC_OK();
  }

  if (!EnsureSufficientShmems(aData.Length())) {
    mDecodePromise.RejectIfExists(
        MediaResult(NS_ERROR_DOM_MEDIA_FATAL_ERR,
                    RESULT_DETAIL("Failled to ensure CDM has enough shmems.")),
        __func__);
    return IPC_OK();
  }

  RefPtr<VideoData> v = CreateVideoFrame(aFrame, aData);
  if (!v) {
    mDecodePromise.RejectIfExists(
        MediaResult(NS_ERROR_OUT_OF_MEMORY,
                    RESULT_DETAIL("Can't create VideoData")),
        __func__);
    return IPC_OK();
  }

  ReorderAndReturnOutput(std::move(v));

  return IPC_OK();
}

ipc::IPCResult ChromiumCDMParent::RecvDecodedShmem(const CDMVideoFrame& aFrame,
                                                   ipc::Shmem&& aShmem) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG("ChromiumCDMParent::RecvDecodedShmem(this=%p) time=%" PRId64
                " duration=%" PRId64,
                this, aFrame.mTimestamp(), aFrame.mDuration());

  // On failure we need to deallocate the shmem we're to return to the
  // CDM. On success we return it to the CDM to be reused.
  auto autoDeallocateShmem =
      MakeScopeExit([&, this] { this->DeallocShmem(aShmem); });

  if (mIsShutdown || mDecodePromise.IsEmpty()) {
    return IPC_OK();
  }

  RefPtr<VideoData> v = CreateVideoFrame(
      aFrame, Span<uint8_t>(aShmem.get<uint8_t>(), aShmem.Size<uint8_t>()));
  if (!v) {
    mDecodePromise.RejectIfExists(
        MediaResult(NS_ERROR_OUT_OF_MEMORY,
                    RESULT_DETAIL("Can't create VideoData")),
        __func__);
    return IPC_OK();
  }

  // Return the shmem to the CDM so the shmem can be reused to send us
  // another frame.
  if (!SendGiveBuffer(std::move(aShmem))) {
    mDecodePromise.RejectIfExists(
        MediaResult(NS_ERROR_OUT_OF_MEMORY,
                    RESULT_DETAIL("Can't return shmem to CDM process")),
        __func__);
    return IPC_OK();
  }

  // Don't need to deallocate the shmem since the CDM process is responsible
  // for it again.
  autoDeallocateShmem.release();

  ReorderAndReturnOutput(std::move(v));

  return IPC_OK();
}

void ChromiumCDMParent::ReorderAndReturnOutput(RefPtr<VideoData>&& aFrame) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  if (mMaxRefFrames == 0) {
    mDecodePromise.ResolveIfExists(
        MediaDataDecoder::DecodedData({std::move(aFrame)}), __func__);
    return;
  }
  mReorderQueue.Push(std::move(aFrame));
  MediaDataDecoder::DecodedData results;
  while (mReorderQueue.Length() > mMaxRefFrames) {
    results.AppendElement(mReorderQueue.Pop());
  }
  mDecodePromise.Resolve(std::move(results), __func__);
}

already_AddRefed<VideoData> ChromiumCDMParent::CreateVideoFrame(
    const CDMVideoFrame& aFrame, Span<uint8_t> aData) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  MOZ_ASSERT(aData.Length() > 0);
  GMP_LOG_DEBUG(
      "ChromiumCDMParent::CreateVideoFrame(this=%p aFrame.mFormat=%" PRIu32 ")",
      this, aFrame.mFormat());

  if (aFrame.mFormat() == cdm::VideoFormat::kUnknownVideoFormat) {
    GMP_LOG_DEBUG(
        "ChromiumCDMParent::CreateVideoFrame(this=%p) Got kUnknownVideoFormat, "
        "bailing.",
        this);
    return nullptr;
  }

  if (aFrame.mFormat() == cdm::VideoFormat::kYUV420P9 ||
      aFrame.mFormat() == cdm::VideoFormat::kYUV422P9 ||
      aFrame.mFormat() == cdm::VideoFormat::kYUV444P9) {
    // If we ever hit this we can reconsider support, but 9 bit formats
    // should be so rare as to be non-existent.
    GMP_LOG_DEBUG(
        "ChromiumCDMParent::CreateVideoFrame(this=%p) Got a 9 bit depth pixel "
        "format. We don't support these, bailing.",
        this);
    return nullptr;
  }

  VideoData::YCbCrBuffer b;

  // Determine the dimensions of our chroma planes, color depth and chroma
  // subsampling.
  uint32_t chromaWidth = (aFrame.mImageWidth() + 1) / 2;
  uint32_t chromaHeight = (aFrame.mImageHeight() + 1) / 2;
  gfx::ColorDepth colorDepth = gfx::ColorDepth::COLOR_8;
  gfx::ChromaSubsampling chromaSubsampling =
      gfx::ChromaSubsampling::HALF_WIDTH_AND_HEIGHT;
  switch (aFrame.mFormat()) {
    case cdm::VideoFormat::kYv12:
    case cdm::VideoFormat::kI420:
      break;
    case cdm::VideoFormat::kYUV420P10:
      colorDepth = gfx::ColorDepth::COLOR_10;
      break;
    case cdm::VideoFormat::kYUV422P10:
      chromaHeight = aFrame.mImageHeight();
      colorDepth = gfx::ColorDepth::COLOR_10;
      chromaSubsampling = gfx::ChromaSubsampling::HALF_WIDTH;
      break;
    case cdm::VideoFormat::kYUV444P10:
      chromaWidth = aFrame.mImageWidth();
      chromaHeight = aFrame.mImageHeight();
      colorDepth = gfx::ColorDepth::COLOR_10;
      chromaSubsampling = gfx::ChromaSubsampling::FULL;
      break;
    case cdm::VideoFormat::kYUV420P12:
      colorDepth = gfx::ColorDepth::COLOR_12;
      break;
    case cdm::VideoFormat::kYUV422P12:
      chromaHeight = aFrame.mImageHeight();
      colorDepth = gfx::ColorDepth::COLOR_12;
      chromaSubsampling = gfx::ChromaSubsampling::HALF_WIDTH;
      break;
    case cdm::VideoFormat::kYUV444P12:
      chromaWidth = aFrame.mImageWidth();
      chromaHeight = aFrame.mImageHeight();
      colorDepth = gfx::ColorDepth::COLOR_12;
      chromaSubsampling = gfx::ChromaSubsampling::FULL;
      break;
    default:
      MOZ_ASSERT_UNREACHABLE("Should handle all formats");
      return nullptr;
  }

  // Since we store each plane separately we can just roll the offset
  // into our pointer to that plane and store that.
  b.mPlanes[0].mData = aData.Elements() + aFrame.mYPlane().mPlaneOffset();
  b.mPlanes[0].mWidth = aFrame.mImageWidth();
  b.mPlanes[0].mHeight = aFrame.mImageHeight();
  b.mPlanes[0].mStride = aFrame.mYPlane().mStride();
  b.mPlanes[0].mSkip = 0;

  b.mPlanes[1].mData = aData.Elements() + aFrame.mUPlane().mPlaneOffset();
  b.mPlanes[1].mWidth = chromaWidth;
  b.mPlanes[1].mHeight = chromaHeight;
  b.mPlanes[1].mStride = aFrame.mUPlane().mStride();
  b.mPlanes[1].mSkip = 0;

  b.mPlanes[2].mData = aData.Elements() + aFrame.mVPlane().mPlaneOffset();
  b.mPlanes[2].mWidth = chromaWidth;
  b.mPlanes[2].mHeight = chromaHeight;
  b.mPlanes[2].mStride = aFrame.mVPlane().mStride();
  b.mPlanes[2].mSkip = 0;

  b.mColorDepth = colorDepth;
  b.mChromaSubsampling = chromaSubsampling;

  // We unfortunately can't know which colorspace the video is using at this
  // stage.
  b.mYUVColorSpace =
      DefaultColorSpace({aFrame.mImageWidth(), aFrame.mImageHeight()});

  gfx::IntRect pictureRegion(0, 0, aFrame.mImageWidth(), aFrame.mImageHeight());

  mozilla::Result<already_AddRefed<VideoData>, MediaResult> r =
      VideoData::CreateAndCopyData(
          mVideoInfo, mImageContainer, mLastStreamOffset,
          media::TimeUnit::FromMicroseconds(
              CheckedInt64(aFrame.mTimestamp()).value()),
          media::TimeUnit::FromMicroseconds(
              CheckedInt64(aFrame.mDuration()).value()),
          b, false, media::TimeUnit::FromMicroseconds(-1), pictureRegion,
          mKnowsCompositor);
  RefPtr<VideoData> v = r.unwrapOr(nullptr);

  if (!v || !v->mImage) {
    NS_WARNING("Failed to decode video frame.");
    return v.forget();
  }

  // This is a DRM image.
  v->mImage->SetIsDRM(true);

  return v.forget();
}

ipc::IPCResult ChromiumCDMParent::RecvDecodeFailed(const uint32_t& aStatus) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG("ChromiumCDMParent::RecvDecodeFailed(this=%p status=%" PRIu32
                ")",
                this, aStatus);
  if (mIsShutdown) {
    MOZ_ASSERT(mDecodePromise.IsEmpty());
    return IPC_OK();
  }

  if (aStatus == cdm::kNeedMoreData) {
    mDecodePromise.ResolveIfExists(nsTArray<RefPtr<MediaData>>(), __func__);
    return IPC_OK();
  }

  mDecodePromise.RejectIfExists(
      MediaResult(
          NS_ERROR_DOM_MEDIA_FATAL_ERR,
          RESULT_DETAIL(
              "ChromiumCDMParent::RecvDecodeFailed with status %s (%" PRIu32
              ")",
              CdmStatusToString(aStatus), aStatus)),
      __func__);
  return IPC_OK();
}

ipc::IPCResult ChromiumCDMParent::RecvShutdown() {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG("ChromiumCDMParent::RecvShutdown(this=%p)", this);
  Shutdown();
  return IPC_OK();
}

void ChromiumCDMParent::ActorDestroy(ActorDestroyReason aWhy) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG("ChromiumCDMParent::ActorDestroy(this=%p, reason=%d)", this,
                aWhy);
  MOZ_ASSERT(!mActorDestroyed);
  mActorDestroyed = true;
  // Shutdown() will clear mCDMCallback, so let's keep a reference for later
  // use.
  auto callback = mCDMCallback;
  if (!mIsShutdown) {
    // Plugin crash.
    MOZ_ASSERT(aWhy == AbnormalShutdown);
    Shutdown();
  }
  MOZ_ASSERT(mIsShutdown);
  RefPtr<ChromiumCDMParent> kungFuDeathGrip(this);
  if (mContentParent) {
    mContentParent->ChromiumCDMDestroyed(this);
    mContentParent = nullptr;
  }
  mAbnormalShutdown = (aWhy == AbnormalShutdown);
  if (mAbnormalShutdown && callback) {
    callback->Terminated();
  }
  MaybeDisconnect(mAbnormalShutdown);
}

RefPtr<MediaDataDecoder::InitPromise> ChromiumCDMParent::InitializeVideoDecoder(
    const gmp::CDMVideoDecoderConfig& aConfig, const VideoInfo& aInfo,
    RefPtr<layers::ImageContainer> aImageContainer,
    RefPtr<layers::KnowsCompositor> aKnowsCompositor) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  if (mIsShutdown) {
    return MediaDataDecoder::InitPromise::CreateAndReject(
        MediaResult(NS_ERROR_DOM_MEDIA_FATAL_ERR,
                    RESULT_DETAIL("ChromiumCDMParent is shutdown")),
        __func__);
  }

  // The Widevine CDM version 1.4.8.970 and above contain a video decoder that
  // does not optimally allocate video frames; it requests buffers much larger
  // than required. The exact formula the CDM uses to calculate their frame
  // sizes isn't obvious, but they normally request around or slightly more
  // than 1.5X the optimal amount. So pad the size of buffers we allocate so
  // that we're likely to have buffers big enough to accomodate the CDM's weird
  // frame size calculation.
  const size_t bufferSize =
      1.7 * I420FrameBufferSizePadded(aInfo.mImage.width, aInfo.mImage.height);
  if (bufferSize <= 0) {
    return MediaDataDecoder::InitPromise::CreateAndReject(
        MediaResult(NS_ERROR_DOM_MEDIA_FATAL_ERR,
                    RESULT_DETAIL("Video frame buffer size is invalid.")),
        __func__);
  }

  if (!EnsureSufficientShmems(bufferSize)) {
    return MediaDataDecoder::InitPromise::CreateAndReject(
        MediaResult(NS_ERROR_DOM_MEDIA_FATAL_ERR,
                    RESULT_DETAIL("Failed to init shmems for video decoder")),
        __func__);
  }

  if (!SendInitializeVideoDecoder(aConfig)) {
    return MediaDataDecoder::InitPromise::CreateAndReject(
        MediaResult(NS_ERROR_DOM_MEDIA_FATAL_ERR,
                    RESULT_DETAIL("Failed to send init video decoder to CDM")),
        __func__);
  }

  mMaxRefFrames = (aConfig.mCodec() == cdm::VideoCodec::kCodecH264)
                      ? H264::HasSPS(aInfo.mExtraData)
                            ? H264::ComputeMaxRefFrames(aInfo.mExtraData)
                            : 16
                      : 0;

  mVideoDecoderInitialized = true;
  mImageContainer = aImageContainer;
  mKnowsCompositor = aKnowsCompositor;
  mVideoInfo = aInfo;
  mVideoFrameBufferSize = bufferSize;

  return mInitVideoDecoderPromise.Ensure(__func__);
}

ipc::IPCResult ChromiumCDMParent::RecvOnDecoderInitDone(
    const uint32_t& aStatus) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG(
      "ChromiumCDMParent::RecvOnDecoderInitDone(this=%p, status=%" PRIu32 ")",
      this, aStatus);
  if (mIsShutdown) {
    MOZ_ASSERT(mInitVideoDecoderPromise.IsEmpty());
    return IPC_OK();
  }
  if (aStatus == static_cast<uint32_t>(cdm::kSuccess)) {
    mInitVideoDecoderPromise.ResolveIfExists(TrackInfo::kVideoTrack, __func__);
  } else {
    mVideoDecoderInitialized = false;
    mInitVideoDecoderPromise.RejectIfExists(
        MediaResult(
            NS_ERROR_DOM_MEDIA_FATAL_ERR,
            RESULT_DETAIL("CDM init decode failed with status %s (%" PRIu32 ")",
                          CdmStatusToString(aStatus), aStatus)),
        __func__);
  }
  return IPC_OK();
}

RefPtr<MediaDataDecoder::DecodePromise>
ChromiumCDMParent::DecryptAndDecodeFrame(MediaRawData* aSample) {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  if (mIsShutdown) {
    return MediaDataDecoder::DecodePromise::CreateAndReject(
        MediaResult(NS_ERROR_DOM_MEDIA_FATAL_ERR,
                    RESULT_DETAIL("ChromiumCDMParent is shutdown")),
        __func__);
  }

  GMP_LOG_DEBUG("ChromiumCDMParent::DecryptAndDecodeFrame t=%" PRId64,
                aSample->mTime.ToMicroseconds());

  CDMInputBuffer buffer;

  if (!InitCDMInputBuffer(buffer, aSample)) {
    return MediaDataDecoder::DecodePromise::CreateAndReject(
        MediaResult(NS_ERROR_DOM_MEDIA_FATAL_ERR, "Failed to init CDM buffer."),
        __func__);
  }

  mLastStreamOffset = aSample->mOffset;

  if (!SendDecryptAndDecodeFrame(buffer)) {
    GMP_LOG_DEBUG(
        "ChromiumCDMParent::Decrypt(this=%p) failed to send decrypt message.",
        this);
    DeallocShmem(buffer.mData());
    return MediaDataDecoder::DecodePromise::CreateAndReject(
        MediaResult(NS_ERROR_DOM_MEDIA_FATAL_ERR,
                    "Failed to send decrypt to CDM process."),
        __func__);
  }

  return mDecodePromise.Ensure(__func__);
}

RefPtr<MediaDataDecoder::FlushPromise> ChromiumCDMParent::FlushVideoDecoder() {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  if (mIsShutdown) {
    MOZ_ASSERT(mReorderQueue.IsEmpty());
    return MediaDataDecoder::FlushPromise::CreateAndReject(
        MediaResult(NS_ERROR_DOM_MEDIA_FATAL_ERR,
                    RESULT_DETAIL("ChromiumCDMParent is shutdown")),
        __func__);
  }

  mReorderQueue.Clear();

  mDecodePromise.RejectIfExists(NS_ERROR_DOM_MEDIA_CANCELED, __func__);
  if (!SendResetVideoDecoder()) {
    return MediaDataDecoder::FlushPromise::CreateAndReject(
        MediaResult(NS_ERROR_DOM_MEDIA_FATAL_ERR,
                    "Failed to send flush to CDM."),
        __func__);
  }
  return mFlushDecoderPromise.Ensure(__func__);
}

ipc::IPCResult ChromiumCDMParent::RecvResetVideoDecoderComplete() {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  MOZ_ASSERT(mReorderQueue.IsEmpty());
  if (mIsShutdown) {
    MOZ_ASSERT(mFlushDecoderPromise.IsEmpty());
    return IPC_OK();
  }
  mFlushDecoderPromise.ResolveIfExists(true, __func__);
  return IPC_OK();
}

RefPtr<MediaDataDecoder::DecodePromise> ChromiumCDMParent::Drain() {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  MOZ_ASSERT(mDecodePromise.IsEmpty(), "Must wait for decoding to complete");
  if (mIsShutdown) {
    return MediaDataDecoder::DecodePromise::CreateAndReject(
        MediaResult(NS_ERROR_DOM_MEDIA_FATAL_ERR,
                    RESULT_DETAIL("ChromiumCDMParent is shutdown")),
        __func__);
  }

  RefPtr<MediaDataDecoder::DecodePromise> p = mDecodePromise.Ensure(__func__);
  if (!SendDrain()) {
    mDecodePromise.Resolve(MediaDataDecoder::DecodedData(), __func__);
  }
  return p;
}

ipc::IPCResult ChromiumCDMParent::RecvDrainComplete() {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  if (mIsShutdown) {
    MOZ_ASSERT(mDecodePromise.IsEmpty());
    return IPC_OK();
  }

  MediaDataDecoder::DecodedData samples;
  while (!mReorderQueue.IsEmpty()) {
    samples.AppendElement(mReorderQueue.Pop());
  }

  mDecodePromise.ResolveIfExists(std::move(samples), __func__);
  return IPC_OK();
}
RefPtr<ShutdownPromise> ChromiumCDMParent::ShutdownVideoDecoder() {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  if (mIsShutdown || !mVideoDecoderInitialized) {
    return ShutdownPromise::CreateAndResolve(true, __func__);
  }
  mInitVideoDecoderPromise.RejectIfExists(NS_ERROR_DOM_MEDIA_CANCELED,
                                          __func__);
  mDecodePromise.RejectIfExists(NS_ERROR_DOM_MEDIA_CANCELED, __func__);
  MOZ_ASSERT(mFlushDecoderPromise.IsEmpty());
  if (!SendDeinitializeVideoDecoder()) {
    return ShutdownPromise::CreateAndResolve(true, __func__);
  }
  mVideoDecoderInitialized = false;

  GMP_LOG_DEBUG("ChromiumCDMParent::~ShutdownVideoDecoder(this=%p) ", this);

  // The ChromiumCDMChild will purge its shmems, so if the decoder is
  // reinitialized the shmems need to be re-allocated, and they may need
  // to be a different size.
  mVideoShmemsActive = 0;
  mVideoFrameBufferSize = 0;
  return ShutdownPromise::CreateAndResolve(true, __func__);
}

void ChromiumCDMParent::Shutdown() {
  MOZ_ASSERT(mGMPThread->IsOnCurrentThread());
  GMP_LOG_DEBUG("ChromiumCDMParent::Shutdown(this=%p)", this);

  if (mIsShutdown) {
    return;
  }
  mIsShutdown = true;

  // If we're shutting down due to the plugin shutting down due to application
  // shutdown, we should tell the CDM proxy to also shutdown. Otherwise the
  // proxy will shutdown when the owning MediaKeys is destroyed during cycle
  // collection, and that will not shut down cleanly as the GMP thread will be
  // shutdown by then.
  if (mCDMCallback) {
    mCDMCallback->Shutdown();
  }

  // We may be called from a task holding the last reference to the CDM
  // callback, so let's clear our local weak pointer to ensure it will not be
  // used afterward (including from an already-queued task, e.g.: ActorDestroy).
  mCDMCallback = nullptr;

  mReorderQueue.Clear();

  for (RefPtr<DecryptJob>& decrypt : mDecrypts) {
    decrypt->PostResult(eme::AbortedErr);
  }
  mDecrypts.Clear();

  if (mVideoDecoderInitialized && !mActorDestroyed) {
    Unused << SendDeinitializeVideoDecoder();
    mVideoDecoderInitialized = false;
  }

  // Note: MediaKeys rejects all outstanding promises when it initiates
  // shutdown.
  mPromiseToCreateSessionToken.Clear();

  mInitPromise.RejectIfExists(
      MediaResult(NS_ERROR_DOM_ABORT_ERR,
                  RESULT_DETAIL("ChromiumCDMParent is shutdown")),
      __func__);

  mInitVideoDecoderPromise.RejectIfExists(
      MediaResult(NS_ERROR_DOM_MEDIA_FATAL_ERR,
                  RESULT_DETAIL("ChromiumCDMParent is shutdown")),
      __func__);
  mDecodePromise.RejectIfExists(
      MediaResult(NS_ERROR_DOM_MEDIA_FATAL_ERR,
                  RESULT_DETAIL("ChromiumCDMParent is shutdown")),
      __func__);
  mFlushDecoderPromise.RejectIfExists(
      MediaResult(NS_ERROR_DOM_MEDIA_FATAL_ERR,
                  RESULT_DETAIL("ChromiumCDMParent is shutdown")),
      __func__);

  if (!mActorDestroyed) {
    Unused << SendDestroy();
  }
}

}  // namespace mozilla::gmp

#undef NS_DispatchToMainThread