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
|
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "webkit/plugins/ppapi/content_decryptor_delegate.h"
#include "base/callback_helpers.h"
#include "base/debug/trace_event.h"
#include "base/message_loop_proxy.h"
#include "media/base/audio_decoder_config.h"
#include "media/base/bind_to_loop.h"
#include "media/base/channel_layout.h"
#include "media/base/data_buffer.h"
#include "media/base/decoder_buffer.h"
#include "media/base/decrypt_config.h"
#include "media/base/video_decoder_config.h"
#include "media/base/video_frame.h"
#include "media/base/video_util.h"
#include "ppapi/shared_impl/scoped_pp_resource.h"
#include "ppapi/shared_impl/var.h"
#include "ppapi/shared_impl/var_tracker.h"
#include "ppapi/thunk/enter.h"
#include "ppapi/thunk/ppb_buffer_api.h"
#include "ui/gfx/rect.h"
#include "webkit/plugins/ppapi/ppb_buffer_impl.h"
using ppapi::ArrayBufferVar;
using ppapi::PpapiGlobals;
using ppapi::ScopedPPResource;
using ppapi::StringVar;
using ppapi::thunk::EnterResourceNoLock;
using ppapi::thunk::PPB_Buffer_API;
namespace webkit {
namespace ppapi {
namespace {
// Fills |resource| with a PPB_Buffer_Impl and copies |data| into the buffer
// resource. The |*resource|, if valid, will be in the ResourceTracker with a
// reference-count of 0. If |data| is NULL, sets |*resource| to NULL. Returns
// true upon success and false if any error happened.
bool MakeBufferResource(PP_Instance instance,
const uint8* data, uint32_t size,
scoped_refptr<PPB_Buffer_Impl>* resource) {
TRACE_EVENT0("eme", "ContentDecryptorDelegate - MakeBufferResource");
DCHECK(resource);
if (!data || !size) {
DCHECK(!data && !size);
resource = NULL;
return true;
}
scoped_refptr<PPB_Buffer_Impl> buffer(
PPB_Buffer_Impl::CreateResource(instance, size));
if (!buffer.get())
return false;
BufferAutoMapper mapper(buffer.get());
if (!mapper.data() || mapper.size() < size)
return false;
memcpy(mapper.data(), data, size);
*resource = buffer;
return true;
}
// Copies the content of |str| into |array|.
// Returns true if copy succeeded. Returns false if copy failed, e.g. if the
// |array_size| is smaller than the |str| length.
template <uint32_t array_size>
bool CopyStringToArray(const std::string& str, uint8 (&array)[array_size]) {
if (array_size < str.size())
return false;
memcpy(array, str.data(), str.size());
return true;
}
// Fills the |block_info| with information from |encrypted_buffer|.
//
// Returns true if |block_info| is successfully filled. Returns false
// otherwise.
static bool MakeEncryptedBlockInfo(
const scoped_refptr<media::DecoderBuffer>& encrypted_buffer,
uint32_t request_id,
PP_EncryptedBlockInfo* block_info) {
// TODO(xhwang): Fix initialization of PP_EncryptedBlockInfo here and
// anywhere else.
memset(block_info, 0, sizeof(*block_info));
block_info->tracking_info.request_id = request_id;
// EOS buffers need a request ID and nothing more.
if (encrypted_buffer->IsEndOfStream())
return true;
DCHECK(encrypted_buffer->GetDataSize())
<< "DecryptConfig is set on an empty buffer";
block_info->tracking_info.timestamp =
encrypted_buffer->GetTimestamp().InMicroseconds();
block_info->data_size = encrypted_buffer->GetDataSize();
const media::DecryptConfig* decrypt_config =
encrypted_buffer->GetDecryptConfig();
block_info->data_offset = decrypt_config->data_offset();
if (!CopyStringToArray(decrypt_config->key_id(), block_info->key_id) ||
!CopyStringToArray(decrypt_config->iv(), block_info->iv))
return false;
block_info->key_id_size = decrypt_config->key_id().size();
block_info->iv_size = decrypt_config->iv().size();
if (decrypt_config->subsamples().size() > arraysize(block_info->subsamples))
return false;
block_info->num_subsamples = decrypt_config->subsamples().size();
for (uint32_t i = 0; i < block_info->num_subsamples; ++i) {
block_info->subsamples[i].clear_bytes =
decrypt_config->subsamples()[i].clear_bytes;
block_info->subsamples[i].cipher_bytes =
decrypt_config->subsamples()[i].cypher_bytes;
}
return true;
}
// Deserializes audio data stored in |audio_frames| into individual audio
// buffers in |frames|. Returns true upon success.
bool DeserializeAudioFrames(PP_Resource audio_frames,
int data_size,
media::Decryptor::AudioBuffers* frames) {
DCHECK(frames);
EnterResourceNoLock<PPB_Buffer_API> enter(audio_frames, true);
if (!enter.succeeded())
return false;
BufferAutoMapper mapper(enter.object());
if (!mapper.data() || !mapper.size() ||
mapper.size() < static_cast<uint32_t>(data_size))
return false;
const uint8* cur = static_cast<uint8*>(mapper.data());
int bytes_left = data_size;
do {
int64 timestamp = 0;
int64 frame_size = -1;
const int kHeaderSize = sizeof(timestamp) + sizeof(frame_size);
if (bytes_left < kHeaderSize)
return false;
memcpy(×tamp, cur, sizeof(timestamp));
cur += sizeof(timestamp);
bytes_left -= sizeof(timestamp);
memcpy(&frame_size, cur, sizeof(frame_size));
cur += sizeof(frame_size);
bytes_left -= sizeof(frame_size);
// We should *not* have empty frame in the list.
if (frame_size <= 0 || bytes_left < frame_size)
return false;
scoped_refptr<media::DataBuffer> frame =
media::DataBuffer::CopyFrom(cur, frame_size);
frame->SetTimestamp(base::TimeDelta::FromMicroseconds(timestamp));
frames->push_back(frame);
cur += frame_size;
bytes_left -= frame_size;
} while (bytes_left > 0);
return true;
}
PP_AudioCodec MediaAudioCodecToPpAudioCodec(media::AudioCodec codec) {
switch (codec) {
case media::kCodecVorbis:
return PP_AUDIOCODEC_VORBIS;
case media::kCodecAAC:
return PP_AUDIOCODEC_AAC;
default:
return PP_AUDIOCODEC_UNKNOWN;
}
}
PP_VideoCodec MediaVideoCodecToPpVideoCodec(media::VideoCodec codec) {
switch (codec) {
case media::kCodecVP8:
return PP_VIDEOCODEC_VP8;
case media::kCodecH264:
return PP_VIDEOCODEC_H264;
default:
return PP_VIDEOCODEC_UNKNOWN;
}
}
PP_VideoCodecProfile MediaVideoCodecProfileToPpVideoCodecProfile(
media::VideoCodecProfile profile) {
switch (profile) {
case media::VP8PROFILE_MAIN:
return PP_VIDEOCODECPROFILE_VP8_MAIN;
case media::H264PROFILE_BASELINE:
return PP_VIDEOCODECPROFILE_H264_BASELINE;
case media::H264PROFILE_MAIN:
return PP_VIDEOCODECPROFILE_H264_MAIN;
case media::H264PROFILE_EXTENDED:
return PP_VIDEOCODECPROFILE_H264_EXTENDED;
case media::H264PROFILE_HIGH:
return PP_VIDEOCODECPROFILE_H264_HIGH;
case media::H264PROFILE_HIGH10PROFILE:
return PP_VIDEOCODECPROFILE_H264_HIGH_10;
case media::H264PROFILE_HIGH422PROFILE:
return PP_VIDEOCODECPROFILE_H264_HIGH_422;
case media::H264PROFILE_HIGH444PREDICTIVEPROFILE:
return PP_VIDEOCODECPROFILE_H264_HIGH_444_PREDICTIVE;
default:
return PP_VIDEOCODECPROFILE_UNKNOWN;
}
}
PP_DecryptedFrameFormat MediaVideoFormatToPpDecryptedFrameFormat(
media::VideoFrame::Format format) {
switch (format) {
case media::VideoFrame::YV12:
return PP_DECRYPTEDFRAMEFORMAT_YV12;
case media::VideoFrame::I420:
return PP_DECRYPTEDFRAMEFORMAT_I420;
default:
return PP_DECRYPTEDFRAMEFORMAT_UNKNOWN;
}
}
media::Decryptor::Status PpDecryptResultToMediaDecryptorStatus(
PP_DecryptResult result) {
switch (result) {
case PP_DECRYPTRESULT_SUCCESS:
return media::Decryptor::kSuccess;
case PP_DECRYPTRESULT_DECRYPT_NOKEY:
return media::Decryptor::kNoKey;
case PP_DECRYPTRESULT_NEEDMOREDATA:
return media::Decryptor::kNeedMoreData;
case PP_DECRYPTRESULT_DECRYPT_ERROR:
return media::Decryptor::kError;
case PP_DECRYPTRESULT_DECODE_ERROR:
return media::Decryptor::kError;
default:
NOTREACHED();
return media::Decryptor::kError;
}
}
PP_DecryptorStreamType MediaDecryptorStreamTypeToPpStreamType(
media::Decryptor::StreamType stream_type) {
switch (stream_type) {
case media::Decryptor::kAudio:
return PP_DECRYPTORSTREAMTYPE_AUDIO;
case media::Decryptor::kVideo:
return PP_DECRYPTORSTREAMTYPE_VIDEO;
default:
NOTREACHED();
return PP_DECRYPTORSTREAMTYPE_VIDEO;
}
}
} // namespace
ContentDecryptorDelegate::ContentDecryptorDelegate(
PP_Instance pp_instance,
const PPP_ContentDecryptor_Private* plugin_decryption_interface)
: pp_instance_(pp_instance),
plugin_decryption_interface_(plugin_decryption_interface),
next_decryption_request_id_(1),
pending_audio_decrypt_request_id_(0),
pending_video_decrypt_request_id_(0),
pending_audio_decoder_init_request_id_(0),
pending_video_decoder_init_request_id_(0),
pending_audio_decode_request_id_(0),
pending_video_decode_request_id_(0),
weak_ptr_factory_(this),
weak_this_(weak_ptr_factory_.GetWeakPtr()) {
}
void ContentDecryptorDelegate::SetKeyEventCallbacks(
const media::KeyAddedCB& key_added_cb,
const media::KeyErrorCB& key_error_cb,
const media::KeyMessageCB& key_message_cb,
const media::NeedKeyCB& need_key_cb) {
key_added_cb_ = key_added_cb;
key_error_cb_ = key_error_cb;
key_message_cb_ = key_message_cb;
need_key_cb_ = need_key_cb;
}
bool ContentDecryptorDelegate::GenerateKeyRequest(const std::string& key_system,
const std::string& type,
const uint8* init_data,
int init_data_length) {
if (key_system.empty())
return false;
PP_Var init_data_array =
PpapiGlobals::Get()->GetVarTracker()->MakeArrayBufferPPVar(
init_data_length, init_data);
plugin_decryption_interface_->GenerateKeyRequest(
pp_instance_,
StringVar::StringToPPVar(key_system),
StringVar::StringToPPVar(type),
init_data_array);
return true;
}
bool ContentDecryptorDelegate::AddKey(const std::string& session_id,
const uint8* key,
int key_length,
const uint8* init_data,
int init_data_length) {
PP_Var key_array =
PpapiGlobals::Get()->GetVarTracker()->MakeArrayBufferPPVar(key_length,
key);
PP_Var init_data_array =
PpapiGlobals::Get()->GetVarTracker()->MakeArrayBufferPPVar(
init_data_length, init_data);
plugin_decryption_interface_->AddKey(
pp_instance_,
StringVar::StringToPPVar(session_id),
key_array,
init_data_array);
return true;
}
bool ContentDecryptorDelegate::CancelKeyRequest(const std::string& session_id) {
plugin_decryption_interface_->CancelKeyRequest(
pp_instance_,
StringVar::StringToPPVar(session_id));
return true;
}
// TODO(xhwang): Remove duplication of code in Decrypt(),
// DecryptAndDecodeAudio() and DecryptAndDecodeVideo().
bool ContentDecryptorDelegate::Decrypt(
media::Decryptor::StreamType stream_type,
const scoped_refptr<media::DecoderBuffer>& encrypted_buffer,
const media::Decryptor::DecryptCB& decrypt_cb) {
DVLOG(3) << "Decrypt() - stream_type: " << stream_type;
// |{audio|video}_input_resource_| is not being used by the plugin
// now because there is only one pending audio/video decrypt request at any
// time. This is enforced by the media pipeline.
scoped_refptr<PPB_Buffer_Impl> encrypted_resource;
if (!MakeMediaBufferResource(
stream_type, encrypted_buffer, &encrypted_resource) ||
!encrypted_resource.get()) {
return false;
}
ScopedPPResource pp_resource(encrypted_resource.get());
const uint32_t request_id = next_decryption_request_id_++;
DVLOG(2) << "Decrypt() - request_id " << request_id;
PP_EncryptedBlockInfo block_info = {};
DCHECK(encrypted_buffer->GetDecryptConfig());
if (!MakeEncryptedBlockInfo(encrypted_buffer, request_id, &block_info)) {
return false;
}
// There is only one pending decrypt request at any time per stream. This is
// enforced by the media pipeline.
switch (stream_type) {
case media::Decryptor::kAudio:
DCHECK_EQ(pending_audio_decrypt_request_id_, 0u);
DCHECK(pending_audio_decrypt_cb_.is_null());
pending_audio_decrypt_request_id_ = request_id;
pending_audio_decrypt_cb_ = decrypt_cb;
break;
case media::Decryptor::kVideo:
DCHECK_EQ(pending_video_decrypt_request_id_, 0u);
DCHECK(pending_video_decrypt_cb_.is_null());
pending_video_decrypt_request_id_ = request_id;
pending_video_decrypt_cb_ = decrypt_cb;
break;
default:
NOTREACHED();
return false;
}
SetBufferToFreeInTrackingInfo(&block_info.tracking_info);
plugin_decryption_interface_->Decrypt(pp_instance_,
pp_resource,
&block_info);
return true;
}
bool ContentDecryptorDelegate::CancelDecrypt(
media::Decryptor::StreamType stream_type) {
DVLOG(3) << "CancelDecrypt() - stream_type: " << stream_type;
media::Decryptor::DecryptCB decrypt_cb;
switch (stream_type) {
case media::Decryptor::kAudio:
// Release the shared memory as it can still be in use by the plugin.
// The next Decrypt() call will need to allocate a new shared memory
// buffer.
audio_input_resource_ = NULL;
pending_audio_decrypt_request_id_ = 0;
decrypt_cb = base::ResetAndReturn(&pending_audio_decrypt_cb_);
break;
case media::Decryptor::kVideo:
// Release the shared memory as it can still be in use by the plugin.
// The next Decrypt() call will need to allocate a new shared memory
// buffer.
video_input_resource_ = NULL;
pending_video_decrypt_request_id_ = 0;
decrypt_cb = base::ResetAndReturn(&pending_video_decrypt_cb_);
break;
default:
NOTREACHED();
return false;
}
if (!decrypt_cb.is_null())
decrypt_cb.Run(media::Decryptor::kSuccess, NULL);
return true;
}
bool ContentDecryptorDelegate::InitializeAudioDecoder(
const media::AudioDecoderConfig& decoder_config,
const media::Decryptor::DecoderInitCB& init_cb) {
PP_AudioDecoderConfig pp_decoder_config;
pp_decoder_config.codec =
MediaAudioCodecToPpAudioCodec(decoder_config.codec());
pp_decoder_config.channel_count =
media::ChannelLayoutToChannelCount(decoder_config.channel_layout());
pp_decoder_config.bits_per_channel = decoder_config.bits_per_channel();
pp_decoder_config.samples_per_second = decoder_config.samples_per_second();
pp_decoder_config.request_id = next_decryption_request_id_++;
scoped_refptr<PPB_Buffer_Impl> extra_data_resource;
if (!MakeBufferResource(pp_instance_,
decoder_config.extra_data(),
decoder_config.extra_data_size(),
&extra_data_resource)) {
return false;
}
ScopedPPResource pp_resource(extra_data_resource.get());
DCHECK_EQ(pending_audio_decoder_init_request_id_, 0u);
DCHECK(pending_audio_decoder_init_cb_.is_null());
pending_audio_decoder_init_request_id_ = pp_decoder_config.request_id;
pending_audio_decoder_init_cb_ = init_cb;
plugin_decryption_interface_->InitializeAudioDecoder(pp_instance_,
&pp_decoder_config,
pp_resource);
return true;
}
bool ContentDecryptorDelegate::InitializeVideoDecoder(
const media::VideoDecoderConfig& decoder_config,
const media::Decryptor::DecoderInitCB& init_cb) {
PP_VideoDecoderConfig pp_decoder_config;
pp_decoder_config.codec =
MediaVideoCodecToPpVideoCodec(decoder_config.codec());
pp_decoder_config.profile =
MediaVideoCodecProfileToPpVideoCodecProfile(decoder_config.profile());
pp_decoder_config.format =
MediaVideoFormatToPpDecryptedFrameFormat(decoder_config.format());
pp_decoder_config.width = decoder_config.coded_size().width();
pp_decoder_config.height = decoder_config.coded_size().height();
pp_decoder_config.request_id = next_decryption_request_id_++;
scoped_refptr<PPB_Buffer_Impl> extra_data_resource;
if (!MakeBufferResource(pp_instance_,
decoder_config.extra_data(),
decoder_config.extra_data_size(),
&extra_data_resource)) {
return false;
}
ScopedPPResource pp_resource(extra_data_resource.get());
DCHECK_EQ(pending_video_decoder_init_request_id_, 0u);
DCHECK(pending_video_decoder_init_cb_.is_null());
pending_video_decoder_init_request_id_ = pp_decoder_config.request_id;
pending_video_decoder_init_cb_ = init_cb;
natural_size_ = decoder_config.natural_size();
plugin_decryption_interface_->InitializeVideoDecoder(pp_instance_,
&pp_decoder_config,
pp_resource);
return true;
}
bool ContentDecryptorDelegate::DeinitializeDecoder(
media::Decryptor::StreamType stream_type) {
CancelDecode(stream_type);
natural_size_ = gfx::Size();
// TODO(tomfinegan): Add decoder deinitialize request tracking, and get
// stream type from media stack.
plugin_decryption_interface_->DeinitializeDecoder(
pp_instance_, MediaDecryptorStreamTypeToPpStreamType(stream_type), 0);
return true;
}
bool ContentDecryptorDelegate::ResetDecoder(
media::Decryptor::StreamType stream_type) {
CancelDecode(stream_type);
// TODO(tomfinegan): Add decoder reset request tracking.
plugin_decryption_interface_->ResetDecoder(
pp_instance_, MediaDecryptorStreamTypeToPpStreamType(stream_type), 0);
return true;
}
bool ContentDecryptorDelegate::DecryptAndDecodeAudio(
const scoped_refptr<media::DecoderBuffer>& encrypted_buffer,
const media::Decryptor::AudioDecodeCB& audio_decode_cb) {
// |audio_input_resource_| is not being used by the plugin now
// because there is only one pending audio decode request at any time.
// This is enforced by the media pipeline.
scoped_refptr<PPB_Buffer_Impl> encrypted_resource;
if (!MakeMediaBufferResource(media::Decryptor::kAudio,
encrypted_buffer,
&encrypted_resource)) {
return false;
}
// The resource should not be NULL for non-EOS buffer.
if (!encrypted_buffer->IsEndOfStream() && !encrypted_resource.get())
return false;
const uint32_t request_id = next_decryption_request_id_++;
DVLOG(2) << "DecryptAndDecodeAudio() - request_id " << request_id;
PP_EncryptedBlockInfo block_info = {};
if (!MakeEncryptedBlockInfo(encrypted_buffer, request_id, &block_info)) {
return false;
}
SetBufferToFreeInTrackingInfo(&block_info.tracking_info);
// There is only one pending audio decode request at any time. This is
// enforced by the media pipeline. If this DCHECK is violated, our buffer
// reuse policy is not valid, and we may have race problems for the shared
// buffer.
DCHECK_EQ(pending_audio_decode_request_id_, 0u);
DCHECK(pending_audio_decode_cb_.is_null());
pending_audio_decode_request_id_ = request_id;
pending_audio_decode_cb_ = audio_decode_cb;
ScopedPPResource pp_resource(encrypted_resource.get());
plugin_decryption_interface_->DecryptAndDecode(pp_instance_,
PP_DECRYPTORSTREAMTYPE_AUDIO,
pp_resource,
&block_info);
return true;
}
bool ContentDecryptorDelegate::DecryptAndDecodeVideo(
const scoped_refptr<media::DecoderBuffer>& encrypted_buffer,
const media::Decryptor::VideoDecodeCB& video_decode_cb) {
// |video_input_resource_| is not being used by the plugin now
// because there is only one pending video decode request at any time.
// This is enforced by the media pipeline.
scoped_refptr<PPB_Buffer_Impl> encrypted_resource;
if (!MakeMediaBufferResource(media::Decryptor::kVideo,
encrypted_buffer,
&encrypted_resource)) {
return false;
}
// The resource should not be 0 for non-EOS buffer.
if (!encrypted_buffer->IsEndOfStream() && !encrypted_resource.get())
return false;
const uint32_t request_id = next_decryption_request_id_++;
DVLOG(2) << "DecryptAndDecodeVideo() - request_id " << request_id;
TRACE_EVENT_ASYNC_BEGIN0(
"eme", "ContentDecryptorDelegate::DecryptAndDecodeVideo", request_id);
PP_EncryptedBlockInfo block_info = {};
if (!MakeEncryptedBlockInfo(encrypted_buffer, request_id, &block_info)) {
return false;
}
SetBufferToFreeInTrackingInfo(&block_info.tracking_info);
// Only one pending video decode request at any time. This is enforced by the
// media pipeline. If this DCHECK is violated, our buffer
// reuse policy is not valid, and we may have race problems for the shared
// buffer.
DCHECK_EQ(pending_video_decode_request_id_, 0u);
DCHECK(pending_video_decode_cb_.is_null());
pending_video_decode_request_id_ = request_id;
pending_video_decode_cb_ = video_decode_cb;
// TODO(tomfinegan): Need to get stream type from media stack.
ScopedPPResource pp_resource(encrypted_resource.get());
plugin_decryption_interface_->DecryptAndDecode(pp_instance_,
PP_DECRYPTORSTREAMTYPE_VIDEO,
pp_resource,
&block_info);
return true;
}
void ContentDecryptorDelegate::NeedKey(PP_Var key_system_var,
PP_Var session_id_var,
PP_Var init_data_var) {
// TODO(tomfinegan): send the data to media stack.
}
void ContentDecryptorDelegate::KeyAdded(PP_Var key_system_var,
PP_Var session_id_var) {
if (key_added_cb_.is_null())
return;
StringVar* key_system_string = StringVar::FromPPVar(key_system_var);
StringVar* session_id_string = StringVar::FromPPVar(session_id_var);
if (!key_system_string || !session_id_string) {
key_error_cb_.Run(
std::string(), std::string(), media::MediaKeys::kUnknownError, 0);
return;
}
key_added_cb_.Run(key_system_string->value(), session_id_string->value());
}
void ContentDecryptorDelegate::KeyMessage(PP_Var key_system_var,
PP_Var session_id_var,
PP_Var message_var,
PP_Var default_url_var) {
if (key_message_cb_.is_null())
return;
StringVar* key_system_string = StringVar::FromPPVar(key_system_var);
StringVar* session_id_string = StringVar::FromPPVar(session_id_var);
ArrayBufferVar* message_array_buffer =
ArrayBufferVar::FromPPVar(message_var);
std::string message;
if (message_array_buffer) {
const char* data = static_cast<const char*>(message_array_buffer->Map());
message.assign(data, message_array_buffer->ByteLength());
}
StringVar* default_url_string = StringVar::FromPPVar(default_url_var);
if (!key_system_string || !session_id_string || !default_url_string) {
key_error_cb_.Run(
std::string(), std::string(), media::MediaKeys::kUnknownError, 0);
return;
}
key_message_cb_.Run(key_system_string->value(),
session_id_string->value(),
message,
default_url_string->value());
}
void ContentDecryptorDelegate::KeyError(PP_Var key_system_var,
PP_Var session_id_var,
int32_t media_error,
int32_t system_code) {
if (key_error_cb_.is_null())
return;
StringVar* key_system_string = StringVar::FromPPVar(key_system_var);
StringVar* session_id_string = StringVar::FromPPVar(session_id_var);
if (!key_system_string || !session_id_string) {
key_error_cb_.Run(
std::string(), std::string(), media::MediaKeys::kUnknownError, 0);
return;
}
key_error_cb_.Run(
key_system_string->value(),
session_id_string->value(),
static_cast<media::MediaKeys::KeyError>(media_error),
system_code);
}
void ContentDecryptorDelegate::DecoderInitializeDone(
PP_DecryptorStreamType decoder_type,
uint32_t request_id,
PP_Bool success) {
if (decoder_type == PP_DECRYPTORSTREAMTYPE_AUDIO) {
// If the request ID is not valid or does not match what's saved, do
// nothing.
if (request_id == 0 ||
request_id != pending_audio_decoder_init_request_id_)
return;
DCHECK(!pending_audio_decoder_init_cb_.is_null());
pending_audio_decoder_init_request_id_ = 0;
base::ResetAndReturn(
&pending_audio_decoder_init_cb_).Run(PP_ToBool(success));
} else {
if (request_id == 0 ||
request_id != pending_video_decoder_init_request_id_)
return;
if (!success)
natural_size_ = gfx::Size();
DCHECK(!pending_video_decoder_init_cb_.is_null());
pending_video_decoder_init_request_id_ = 0;
base::ResetAndReturn(
&pending_video_decoder_init_cb_).Run(PP_ToBool(success));
}
}
void ContentDecryptorDelegate::DecoderDeinitializeDone(
PP_DecryptorStreamType decoder_type,
uint32_t request_id) {
// TODO(tomfinegan): Add decoder stop completion handling.
}
void ContentDecryptorDelegate::DecoderResetDone(
PP_DecryptorStreamType decoder_type,
uint32_t request_id) {
// TODO(tomfinegan): Add decoder reset completion handling.
}
void ContentDecryptorDelegate::DeliverBlock(
PP_Resource decrypted_block,
const PP_DecryptedBlockInfo* block_info) {
DCHECK(block_info);
FreeBuffer(block_info->tracking_info.buffer_id);
const uint32_t request_id = block_info->tracking_info.request_id;
DVLOG(2) << "DeliverBlock() - request_id: " << request_id;
// If the request ID is not valid or does not match what's saved, do nothing.
if (request_id == 0) {
DVLOG(1) << "DeliverBlock() - invalid request_id " << request_id;
return;
}
media::Decryptor::DecryptCB decrypt_cb;
if (request_id == pending_audio_decrypt_request_id_) {
DCHECK(!pending_audio_decrypt_cb_.is_null());
pending_audio_decrypt_request_id_ = 0;
decrypt_cb = base::ResetAndReturn(&pending_audio_decrypt_cb_);
} else if (request_id == pending_video_decrypt_request_id_) {
DCHECK(!pending_video_decrypt_cb_.is_null());
pending_video_decrypt_request_id_ = 0;
decrypt_cb = base::ResetAndReturn(&pending_video_decrypt_cb_);
} else {
DVLOG(1) << "DeliverBlock() - request_id " << request_id << " not found";
return;
}
media::Decryptor::Status status =
PpDecryptResultToMediaDecryptorStatus(block_info->result);
if (status != media::Decryptor::kSuccess) {
decrypt_cb.Run(status, NULL);
return;
}
EnterResourceNoLock<PPB_Buffer_API> enter(decrypted_block, true);
if (!enter.succeeded()) {
decrypt_cb.Run(media::Decryptor::kError, NULL);
return;
}
BufferAutoMapper mapper(enter.object());
if (!mapper.data() || !mapper.size() ||
mapper.size() < block_info->data_size) {
decrypt_cb.Run(media::Decryptor::kError, NULL);
return;
}
// TODO(tomfinegan): Find a way to take ownership of the shared memory
// managed by the PPB_Buffer_Dev, and avoid the extra copy.
scoped_refptr<media::DecoderBuffer> decrypted_buffer(
media::DecoderBuffer::CopyFrom(
static_cast<uint8*>(mapper.data()), block_info->data_size));
decrypted_buffer->SetTimestamp(base::TimeDelta::FromMicroseconds(
block_info->tracking_info.timestamp));
decrypt_cb.Run(media::Decryptor::kSuccess, decrypted_buffer);
}
// Use a non-class-member function here so that if for some reason
// ContentDecryptorDelegate is destroyed before VideoFrame calls this callback,
// we can still get the shared memory unmapped.
static void BufferNoLongerNeeded(
const scoped_refptr<PPB_Buffer_Impl>& ppb_buffer,
base::Closure buffer_no_longer_needed_cb) {
ppb_buffer->Unmap();
buffer_no_longer_needed_cb.Run();
}
// Enters |resource|, maps shared memory and returns pointer of mapped data.
// Returns NULL if any error occurs.
static uint8* GetMappedBuffer(PP_Resource resource,
scoped_refptr<PPB_Buffer_Impl>* ppb_buffer) {
EnterResourceNoLock<PPB_Buffer_API> enter(resource, true);
if (!enter.succeeded())
return NULL;
uint8* mapped_data = static_cast<uint8*>(enter.object()->Map());
if (!enter.object()->IsMapped() || !mapped_data)
return NULL;
uint32_t mapped_size = 0;
if (!enter.object()->Describe(&mapped_size) || !mapped_size) {
enter.object()->Unmap();
return NULL;
}
*ppb_buffer = static_cast<PPB_Buffer_Impl*>(enter.object());
return mapped_data;
}
void ContentDecryptorDelegate::DeliverFrame(
PP_Resource decrypted_frame,
const PP_DecryptedFrameInfo* frame_info) {
DCHECK(frame_info);
const uint32_t request_id = frame_info->tracking_info.request_id;
DVLOG(2) << "DeliverFrame() - request_id: " << request_id;
// If the request ID is not valid or does not match what's saved, do nothing.
if (request_id == 0 || request_id != pending_video_decode_request_id_) {
DVLOG(1) << "DeliverFrame() - request_id " << request_id << " not found";
FreeBuffer(frame_info->tracking_info.buffer_id);
return;
}
TRACE_EVENT_ASYNC_END0(
"eme", "ContentDecryptorDelegate::DecryptAndDecodeVideo", request_id);
DCHECK(!pending_video_decode_cb_.is_null());
pending_video_decode_request_id_ = 0;
media::Decryptor::VideoDecodeCB video_decode_cb =
base::ResetAndReturn(&pending_video_decode_cb_);
media::Decryptor::Status status =
PpDecryptResultToMediaDecryptorStatus(frame_info->result);
if (status != media::Decryptor::kSuccess) {
DCHECK(!frame_info->tracking_info.buffer_id);
video_decode_cb.Run(status, NULL);
return;
}
scoped_refptr<PPB_Buffer_Impl> ppb_buffer;
uint8* frame_data = GetMappedBuffer(decrypted_frame, &ppb_buffer);
if (!frame_data) {
FreeBuffer(frame_info->tracking_info.buffer_id);
video_decode_cb.Run(media::Decryptor::kError, NULL);
return;
}
gfx::Size frame_size(frame_info->width, frame_info->height);
DCHECK_EQ(frame_info->format, PP_DECRYPTEDFRAMEFORMAT_YV12);
scoped_refptr<media::VideoFrame> decoded_frame =
media::VideoFrame::WrapExternalYuvData(
media::VideoFrame::YV12,
frame_size, gfx::Rect(frame_size), natural_size_,
frame_info->strides[PP_DECRYPTEDFRAMEPLANES_Y],
frame_info->strides[PP_DECRYPTEDFRAMEPLANES_U],
frame_info->strides[PP_DECRYPTEDFRAMEPLANES_V],
frame_data + frame_info->plane_offsets[PP_DECRYPTEDFRAMEPLANES_Y],
frame_data + frame_info->plane_offsets[PP_DECRYPTEDFRAMEPLANES_U],
frame_data + frame_info->plane_offsets[PP_DECRYPTEDFRAMEPLANES_V],
base::TimeDelta::FromMicroseconds(
frame_info->tracking_info.timestamp),
media::BindToLoop(
base::MessageLoopProxy::current(),
base::Bind(&BufferNoLongerNeeded, ppb_buffer,
base::Bind(&ContentDecryptorDelegate::FreeBuffer,
weak_this_,
frame_info->tracking_info.buffer_id))));
video_decode_cb.Run(media::Decryptor::kSuccess, decoded_frame);
}
void ContentDecryptorDelegate::DeliverSamples(
PP_Resource audio_frames,
const PP_DecryptedBlockInfo* block_info) {
DCHECK(block_info);
FreeBuffer(block_info->tracking_info.buffer_id);
const uint32_t request_id = block_info->tracking_info.request_id;
DVLOG(2) << "DeliverSamples() - request_id: " << request_id;
// If the request ID is not valid or does not match what's saved, do nothing.
if (request_id == 0 || request_id != pending_audio_decode_request_id_) {
DVLOG(1) << "DeliverSamples() - request_id " << request_id << " not found";
return;
}
DCHECK(!pending_audio_decode_cb_.is_null());
pending_audio_decode_request_id_ = 0;
media::Decryptor::AudioDecodeCB audio_decode_cb =
base::ResetAndReturn(&pending_audio_decode_cb_);
const media::Decryptor::AudioBuffers empty_frames;
media::Decryptor::Status status =
PpDecryptResultToMediaDecryptorStatus(block_info->result);
if (status != media::Decryptor::kSuccess) {
audio_decode_cb.Run(status, empty_frames);
return;
}
media::Decryptor::AudioBuffers audio_frame_list;
if (!DeserializeAudioFrames(audio_frames,
block_info->data_size,
&audio_frame_list)) {
NOTREACHED() << "CDM did not serialize the buffer correctly.";
audio_decode_cb.Run(media::Decryptor::kError, empty_frames);
return;
}
audio_decode_cb.Run(media::Decryptor::kSuccess, audio_frame_list);
}
// TODO(xhwang): Try to remove duplicate logic here and in CancelDecrypt().
void ContentDecryptorDelegate::CancelDecode(
media::Decryptor::StreamType stream_type) {
switch (stream_type) {
case media::Decryptor::kAudio:
// Release the shared memory as it can still be in use by the plugin.
// The next DecryptAndDecode() call will need to allocate a new shared
// memory buffer.
audio_input_resource_ = NULL;
pending_audio_decode_request_id_ = 0;
if (!pending_audio_decode_cb_.is_null())
base::ResetAndReturn(&pending_audio_decode_cb_).Run(
media::Decryptor::kSuccess, media::Decryptor::AudioBuffers());
break;
case media::Decryptor::kVideo:
// Release the shared memory as it can still be in use by the plugin.
// The next DecryptAndDecode() call will need to allocate a new shared
// memory buffer.
video_input_resource_ = NULL;
pending_video_decode_request_id_ = 0;
if (!pending_video_decode_cb_.is_null())
base::ResetAndReturn(&pending_video_decode_cb_).Run(
media::Decryptor::kSuccess, NULL);
break;
default:
NOTREACHED();
}
}
bool ContentDecryptorDelegate::MakeMediaBufferResource(
media::Decryptor::StreamType stream_type,
const scoped_refptr<media::DecoderBuffer>& encrypted_buffer,
scoped_refptr<PPB_Buffer_Impl>* resource) {
TRACE_EVENT0("eme", "ContentDecryptorDelegate::MakeMediaBufferResource");
// End of stream buffers are represented as null resources.
if (encrypted_buffer->IsEndOfStream()) {
*resource = NULL;
return true;
}
DCHECK(stream_type == media::Decryptor::kAudio ||
stream_type == media::Decryptor::kVideo);
scoped_refptr<PPB_Buffer_Impl>& media_resource =
(stream_type == media::Decryptor::kAudio) ? audio_input_resource_ :
video_input_resource_;
const size_t data_size = static_cast<size_t>(encrypted_buffer->GetDataSize());
if (!media_resource.get() || media_resource->size() < data_size) {
// Either the buffer hasn't been created yet, or we have one that isn't big
// enough to fit |size| bytes.
// Media resource size starts from |kMinimumMediaBufferSize| and grows
// exponentially to avoid frequent re-allocation of PPB_Buffer_Impl,
// which is usually expensive. Since input media buffers are compressed,
// they are usually small (compared to outputs). The over-allocated memory
// should be negligible.
const uint32_t kMinimumMediaBufferSize = 1024;
uint32_t media_resource_size =
media_resource.get() ? media_resource->size() : kMinimumMediaBufferSize;
while (media_resource_size < data_size)
media_resource_size *= 2;
DVLOG(2) << "Size of media buffer for "
<< ((stream_type == media::Decryptor::kAudio) ? "audio" : "video")
<< " stream bumped to " << media_resource_size
<< " bytes to fit input.";
media_resource = PPB_Buffer_Impl::CreateResource(pp_instance_,
media_resource_size);
if (!media_resource.get())
return false;
}
BufferAutoMapper mapper(media_resource.get());
if (!mapper.data() || mapper.size() < data_size) {
media_resource = NULL;
return false;
}
memcpy(mapper.data(), encrypted_buffer->GetData(), data_size);
*resource = media_resource;
return true;
}
void ContentDecryptorDelegate::FreeBuffer(uint32_t buffer_id) {
if (buffer_id)
free_buffers_.push(buffer_id);
}
void ContentDecryptorDelegate::SetBufferToFreeInTrackingInfo(
PP_DecryptTrackingInfo* tracking_info) {
DCHECK_EQ(tracking_info->buffer_id, 0u);
if (free_buffers_.empty())
return;
tracking_info->buffer_id = free_buffers_.front();
free_buffers_.pop();
}
} // namespace ppapi
} // namespace webkit
|