-
Notifications
You must be signed in to change notification settings - Fork 11
/
Copy pathmp4_meta.cc
2625 lines (2033 loc) · 73.2 KB
/
mp4_meta.cc
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
/*
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements. See the NOTICE file
distributed with this work for additional information
regarding copyright ownership. The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
#include "mp4_meta.h"
static mp4_atom_handler mp4_atoms[] = {
{ "ftyp", &Mp4Meta::mp4_read_ftyp_atom }, { "moov",
&Mp4Meta::mp4_read_moov_atom }, { "mdat",
&Mp4Meta::mp4_read_mdat_atom }, { NULL, NULL } };
static mp4_atom_handler mp4_moov_atoms[] = { { "mvhd",
&Mp4Meta::mp4_read_mvhd_atom },
{ "trak", &Mp4Meta::mp4_read_trak_atom }, { "cmov",
&Mp4Meta::mp4_read_cmov_atom }, { NULL, NULL } };
static mp4_atom_handler mp4_trak_atoms[] = { { "tkhd",
&Mp4Meta::mp4_read_tkhd_atom },
{ "mdia", &Mp4Meta::mp4_read_mdia_atom }, { NULL, NULL } };
static mp4_atom_handler mp4_mdia_atoms[] = { { "mdhd",
&Mp4Meta::mp4_read_mdhd_atom },
{ "hdlr", &Mp4Meta::mp4_read_hdlr_atom }, { "minf",
&Mp4Meta::mp4_read_minf_atom }, { NULL, NULL } };
static mp4_atom_handler mp4_minf_atoms[] = { { "vmhd",
&Mp4Meta::mp4_read_vmhd_atom },
{ "smhd", &Mp4Meta::mp4_read_smhd_atom }, { "dinf",
&Mp4Meta::mp4_read_dinf_atom }, { "stbl",
&Mp4Meta::mp4_read_stbl_atom }, { NULL, NULL } };
static mp4_atom_handler mp4_stbl_atoms[] = { { "stsd",
&Mp4Meta::mp4_read_stsd_atom },
{ "stts", &Mp4Meta::mp4_read_stts_atom }, { "stss",
&Mp4Meta::mp4_read_stss_atom }, { "ctts",
&Mp4Meta::mp4_read_ctts_atom }, { "stsc",
&Mp4Meta::mp4_read_stsc_atom }, { "stsz",
&Mp4Meta::mp4_read_stsz_atom }, { "stco",
&Mp4Meta::mp4_read_stco_atom }, { "co64",
&Mp4Meta::mp4_read_co64_atom }, { NULL, NULL } };
static void mp4_reader_set_32value(TSIOBufferReader readerp, int64_t offset,
uint32_t n);
static void mp4_reader_set_64value(TSIOBufferReader readerp, int64_t offset,
uint64_t n);
static uint32_t mp4_reader_get_32value(TSIOBufferReader readerp,
int64_t offset);
static uint64_t mp4_reader_get_64value(TSIOBufferReader readerp,
int64_t offset);
static int64_t IOBufferReaderCopy(TSIOBufferReader readerp, void *buf,
int64_t length);
//#########################drm header start#############################//
void Mp4Meta::get_des_videoid(u_char *des_videoid, uint32_t *d_v_length) {
memcpy(des_videoid, videoid, videoid_size);
des_encrypt(tdes_key, des_videoid, videoid_size);
*d_v_length = videoid_size+MP4_DES_ADD_LENGTH;
if (videoid_size < MP4_DES_ADD_LENGTH) {//当小于MP4_DES_ADD_LENGTH的时候，加密后也是该值
*d_v_length = MP4_DES_ADD_LENGTH;
}
}
int Mp4Meta::process_drm_header() // parse pcf header signature, version, videoid tag, userid tag, reserved tag
{
int64_t avail;
size_t drm_header_size = get_drm_header_size();
char buf[3];
avail = TSIOBufferReaderAvail(meta_reader);
if (avail < (int64_t) drm_header_size)
return 0;
IOBufferReaderCopy(meta_reader, buf, 3);
if (buf[0] != 'P' || buf[1] != 'C'|| buf[2] != 'M') {
return -1;
}
version = mp4_reader_get_32value(meta_reader,3);//4
TSDebug(PLUGIN_NAME, "drm version = %d", version);
if (version != VIDEO_VERSION_4)
return -1;
videoid_size = mp4_reader_get_32value(meta_reader,7);//32
TSDebug(PLUGIN_NAME, " drm videoid_size = %d", videoid_size);
if (videoid_size <= 0)
return -1;
TSIOBufferCopy(drm_buffer, meta_reader, drm_header_size, 0);
TSIOBufferReaderConsume(meta_reader, drm_header_size);
tag_pos += drm_header_size;
TSDebug(PLUGIN_NAME, "process_header tag_pos=%ld", tag_pos);
this->current_handler = &Mp4Meta::process_drm_header_videoid;
return process_drm_header_videoid();
}
int Mp4Meta::process_drm_header_videoid() {
int64_t avail;
size_t userid_size_length = sizeof(uint32_t);
int64_t read_size = videoid_size + userid_size_length;
avail = TSIOBufferReaderAvail(meta_reader);
if (avail < read_size)
return 0;
videoid = (u_char *) TSmalloc(sizeof(u_char) * (videoid_size));
IOBufferReaderCopy(meta_reader, videoid, videoid_size);
TSIOBufferCopy(drm_buffer, meta_reader, videoid_size, 0);
TSIOBufferReaderConsume(meta_reader, videoid_size);
IOBufferReaderCopy(meta_reader, &userid_size, userid_size_length);
userid_size = mp4_reader_get_32value(meta_reader,0);//16
TSIOBufferCopy(drm_buffer, meta_reader, userid_size_length, 0);
TSIOBufferReaderConsume(meta_reader, userid_size_length);
tag_pos += read_size;
if (userid_size <= 0)
return -1;
TSDebug(PLUGIN_NAME, "process_header_videoid userid_size=%d, tag_pos=%ld",
userid_size, tag_pos);
this->current_handler = &Mp4Meta::process_drm_header_userid;
return process_drm_header_userid();
}
int Mp4Meta::process_drm_header_userid() {
int64_t avail;
size_t range_size_length = sizeof(uint32_t);
int64_t read_size = userid_size + range_size_length;
avail = TSIOBufferReaderAvail(meta_reader);
if (avail < read_size)
return 0;
// userid = (u_char *) TSmalloc(sizeof(u_char) * (userid_size));
// IOBufferReaderCopy(meta_reader, userid, userid_size);
// TSDebug(PLUGIN_NAME, "process_header userid=%.*s",userid_size ,userid);
TSIOBufferCopy(drm_buffer, meta_reader, userid_size, 0);
TSIOBufferReaderConsume(meta_reader, userid_size);
IOBufferReaderCopy(meta_reader, &range_size, range_size_length);
range_size = mp4_reader_get_32value(meta_reader,0);//24
TSIOBufferCopy(drm_buffer, meta_reader, range_size_length, 0);
TSIOBufferReaderConsume(meta_reader, range_size_length);
tag_pos += read_size;
TSDebug(PLUGIN_NAME, "process_header_userid range_size=%d, tag_pos=%ld",
range_size, tag_pos);
this->current_handler = &Mp4Meta::process_drm_header_range;
return process_drm_header_range();
}
int Mp4Meta::process_drm_header_range() {
int64_t avail;
size_t range_body_length = sizeof(uint64_t) * 3;
size_t read_size = range_body_length + sizeof(uint32_t) * 2;
u_char buf[read_size];
avail = TSIOBufferReaderAvail(meta_reader);
if (avail < (int64_t) read_size)
return 0;
IOBufferReaderCopy(meta_reader, buf, read_size);
range_start = mp4_get_64value(buf);
range_end = mp4_get_64value(buf + sizeof(uint64_t));
original_file_size = mp4_get_64value(buf + sizeof(uint64_t)* 2);
// TSDebug(PLUGIN_NAME,
// "process_drm_header_range range_start=%ld, range_end=%ld, original_file_size=%ld",
// range_start, range_end, original_file_size);
if ((range_start >= range_end) || ((int64_t)original_file_size >= this->cl))
return -1;
if(this->end > 0 && this->end > (int64_t)range_end)
return -1;
if(this->end == (int64_t)range_end)
this->end = 0;
section_size = mp4_get_32value(buf + range_body_length);
section_count = mp4_get_32value(buf + range_body_length + sizeof(uint32_t));
old_section_count = section_count;
TSIOBufferReaderConsume(meta_reader, read_size);
tag_pos += read_size;
TSDebug(PLUGIN_NAME,
"process_drm_header_range section_size=%d, section_count=%d, tag_pos=%ld",
section_size, section_count, tag_pos);
if (section_count <= 0
|| (section_size
!= ((sizeof(uint64_t) * section_count) + sizeof(uint32_t))))
return -1;
this->current_handler = &Mp4Meta::process_drm_header_sections;
return process_drm_header_sections();
}
int Mp4Meta::process_drm_header_sections() {
int64_t avail;
size_t range_body_length = sizeof(uint64_t) * section_count;
size_t reserved_size_length = sizeof(uint32_t);
int64_t read_size = range_body_length + reserved_size_length;
avail = TSIOBufferReaderAvail(meta_reader);
if (avail < (int64_t) read_size)
return 0;
section_length_arr = (u_char *) TSmalloc(range_body_length);//8184
IOBufferReaderCopy(meta_reader, section_length_arr, range_body_length);
TSIOBufferReaderConsume(meta_reader, range_body_length);
IOBufferReaderCopy(meta_reader, &reserved_size, reserved_size_length);
reserved_size = mp4_reader_get_32value(meta_reader,0);//0
TSIOBufferReaderConsume(meta_reader, reserved_size_length);
tag_pos += read_size;
drm_head_length = tag_pos;
TSDebug(PLUGIN_NAME, "process_drm_header_sections tag_pos=%ld meta_avail=%ld", tag_pos,TSIOBufferReaderAvail(meta_reader));
if (reserved_size <= 0) {
this->current_handler = &Mp4Meta::process_decrypt_mp4_body;
return process_decrypt_mp4_body();
} else {
this->current_handler = &Mp4Meta::process_drm_header_reserved;
return process_drm_header_reserved();
}
}
int Mp4Meta::process_drm_header_reserved() {
int64_t avail;
avail = TSIOBufferReaderAvail(meta_reader);
if (avail < reserved_size)
return 0;
reserved = (u_char *) TSmalloc(sizeof(u_char) * (reserved_size));
IOBufferReaderCopy(meta_reader, reserved, reserved_size);
TSIOBufferReaderConsume(meta_reader, reserved_size);
tag_pos += reserved_size;
drm_head_length = tag_pos;
TSDebug(PLUGIN_NAME, "process_header_reserved reserved=%.*s", reserved_size,
reserved);
this->current_handler = &Mp4Meta::process_decrypt_mp4_body;
return process_decrypt_mp4_body();
}
int Mp4Meta::process_decrypt_mp4_body() {
//parse section_length_arr
uint64_t dec_length;
int64_t avail;
uint64_t section_arr[section_count];
u_char *des_buf;
uint32_t i;
dec_length = 0;
for (i = 0; i < section_count; i++) {
section_arr[i] = mp4_get_64value(section_length_arr + i * sizeof(uint64_t));
// TSDebug(PLUGIN_NAME, "process_decrypt_mp4_body section_arr=%.ld",
// section_arr[i]);
dec_length += section_arr[i];
}
if ((this->cl < (int64_t)dec_length)
|| (dec_length > MP4_DES_LENGTH * MP4_DES_MAX_COUNT))
return -1;
avail = TSIOBufferReaderAvail(meta_reader);
if (avail < (int64_t)dec_length)
return 0;
TSIOBufferCopy(des_buffer, meta_reader, avail, 0);
TSIOBufferReaderConsume(meta_reader, avail);
des_buf = (u_char *) TSmalloc(sizeof(u_char) * MP4_DES_LENGTH);
for (i = 0; i < section_count; i++) {
memset(des_buf, 0, MP4_DES_LENGTH);
IOBufferReaderCopy(des_reader, des_buf, section_arr[i]);
des_decrypt(tdes_key, des_buf, section_arr[i]);
TSIOBufferWrite(meta_buffer, des_buf,section_arr[i] - MP4_DES_ADD_LENGTH);
TSIOBufferReaderConsume(des_reader, section_arr[i]);
}
TSfree((char * )des_buf);
des_buf = NULL;
avail = TSIOBufferReaderAvail(des_reader);
if (avail > 0) {
TSIOBufferCopy(meta_buffer, des_reader, avail, 0);
TSIOBufferReaderConsume(des_reader, avail);
}
this->meta_avail = TSIOBufferReaderAvail(meta_reader);
tag_pos += MP4_DES_ADD_LENGTH * section_count;
TSDebug(PLUGIN_NAME, "process_decrypt_mp4_body tag_pos=%ld", tag_pos);
return 1;
}
int Mp4Meta::read_drm_header(TSIOBufferReader readerp, drm_header * header) {
IOBufferReaderCopy(readerp, &header->signature, sizeof(header->signature));
TSIOBufferReaderConsume(readerp, sizeof(header->signature));
IOBufferReaderCopy(readerp, &header->version, sizeof(header->version));
TSIOBufferReaderConsume(readerp, sizeof(header->version));
IOBufferReaderCopy(readerp, &header->videoid_size,
sizeof(header->videoid_size));
TSIOBufferReaderConsume(readerp, sizeof(header->videoid_size));
if (header->signature[0] != 'P' || header->signature[1] != 'C'
|| header->signature[2] != 'M') {
return -1;
}
return 0;
}
size_t Mp4Meta::get_drm_header_size() {
drm_header header;
return (sizeof(header.signature) + sizeof(header.version)
+ sizeof(header.videoid_size));
}
static int64_t IOBufferReaderCopy(TSIOBufferReader readerp, void *buf,
int64_t length) {
int64_t avail, need, n;
const char *start;
TSIOBufferBlock blk;
n = 0;
blk = TSIOBufferReaderStart(readerp);
while (blk) {
start = TSIOBufferBlockReadStart(blk, readerp, &avail);
need = length < avail ? length : avail;
if (need > 0) {
memcpy((char *) buf + n, start, need);
length -= need;
n += need;
}
if (length == 0)
break;
blk = TSIOBufferBlockNext(blk);
}
return n;
}
int Mp4Meta::process_encrypt_mp4_body() {
int64_t des_avail, new_mp4_length;
uint64_t i, need_length;
u_char *buf;
new_mp4_length = this->range_end - this->range_start + 1;
des_avail = TSIOBufferReaderAvail(des_reader);
need_length = 0;
if(new_mp4_length < MP4_NEED_DES_LENGTH * MP4_DES_MAX_COUNT) {
need_length = new_mp4_length;
} else {
need_length = MP4_NEED_DES_LENGTH * MP4_DES_MAX_COUNT;
}
TSDebug(PLUGIN_NAME, "process_encrypt_mp4_body des_avail=%ld need_length=%ld", des_avail,need_length);
if ((des_avail) < (int64_t)need_length)
return 0;
buf = (u_char *) TSmalloc(sizeof(u_char) * MP4_DES_LENGTH);
for (i = 0; i < section_count -1; i++) {
memset(buf, 0, MP4_DES_LENGTH);
IOBufferReaderCopy(des_reader, buf, MP4_NEED_DES_LENGTH);
TSIOBufferReaderConsume(des_reader, MP4_NEED_DES_LENGTH);
des_encrypt(tdes_key, buf, MP4_NEED_DES_LENGTH);
TSIOBufferWrite(out_handle.buffer, buf, MP4_DES_LENGTH);
// TSDebug(PLUGIN_NAME, "process_des_mp4_body MP4_NEED_DES_LENGTH=%d avail=%ld section_count=%d", MP4_NEED_DES_LENGTH,TSIOBufferReaderAvail(out_handle.reader), section_count);
}
memset(buf, 0, MP4_DES_LENGTH);
if( small_des_add_length && (small_des_add_length < MP4_DES_ADD_LENGTH)) {
IOBufferReaderCopy(des_reader, buf, small_des_add_length);
TSIOBufferReaderConsume(des_reader, small_des_add_length);
des_encrypt(tdes_key, buf, small_des_add_length);
TSIOBufferWrite(out_handle.buffer, buf, MP4_DES_ADD_LENGTH);
} else {
IOBufferReaderCopy(des_reader, buf, MP4_NEED_DES_LENGTH);
TSIOBufferReaderConsume(des_reader, MP4_NEED_DES_LENGTH);
des_encrypt(tdes_key, buf, MP4_NEED_DES_LENGTH);
TSIOBufferWrite(out_handle.buffer, buf, MP4_DES_LENGTH);
}
TSfree((char * )buf);
buf = NULL;
des_avail = TSIOBufferReaderAvail(des_reader);
if (des_avail > 0) {
TSIOBufferCopy(out_handle.buffer, des_reader, des_avail, 0);
TSIOBufferReaderConsume(des_reader, des_avail);
}
this->is_des_body = true;
TSDebug(PLUGIN_NAME, "process_des_mp4_body success");
return 1;
}
//#########################drm header end#############################//
int Mp4Meta::parse_meta(bool body_complete) {
int ret, rc;
int64_t drm_change_length;
uint32_t del_drm_header_length;
meta_avail = TSIOBufferReaderAvail(meta_reader);
if (wait_next && wait_next <= meta_avail) {
mp4_meta_consume(wait_next);
wait_next = 0;
}
if (meta_avail < MP4_MIN_BUFFER_SIZE && !body_complete)
return 0;
drm_change_length = 0;
//parse drm header
if (!complete_parse_drm_header) {
TSDebug(PLUGIN_NAME, "start parse drm header");
ret = (this->*current_handler)();
TSDebug(PLUGIN_NAME, "end parse drm header ret=%d", ret);
if (ret > 0) {
complete_parse_drm_header = true;
if(!this->is_need_md) {
change_drm_header(0, 0);
this->start_pos = this->start + this->tag_pos;
if(this->end) {
this->end_pos = this->end +this->tag_pos+1;
}
//If drm smaller, we need to change the total file size
drm_change_length = this->drm_head_length - TSIOBufferReaderAvail(drm_reader);
TSDebug(PLUGIN_NAME, "parse_meta drm_change_length = %ld", drm_change_length);
this->content_length = this->cl - this->start - (drm_change_length) - this->small_des_add_length;
if(this->end) {
del_drm_header_length = drm_change_length + (this->old_section_count - this->section_count) * MP4_DES_ADD_LENGTH;
this->content_length = this->cl - this->start - ((this->original_file_size-1) - this->end) - del_drm_header_length - this->small_des_add_length;
}
return 1;
}
} else if (ret == 0) {
if (body_complete) {
return -1;
} else {
return 0;
}
} else {
return -1;
}
}
if(!this->is_need_md) {
return -1;
}
this->end = 0;
this->end_pos = 0;
ret = this->parse_root_atoms();
if (ret < 0) {
return -1;
} else if (ret == 0) {
if (body_complete) {
return -1;
} else {
return 0;
}
}
// generate new meta data
rc = this->post_process_meta();
// TSDebug(PLUGIN_NAME, "end post_process_meta rc = %d", rc);
if (rc != 0) {
return -1;
}
return 1;
}
void Mp4Meta::mp4_meta_consume(int64_t size) {
TSIOBufferReaderConsume(meta_reader, size);
meta_avail -= size;
passed += size;
}
//update drm header
int Mp4Meta::change_drm_header(off_t start_offset, off_t adjustment) {
size_t range_body_size, section_size_b, reserved_size_b;
uint32_t i;
uint32_t new_section_count;
uint64_t small_content_length;
int64_t new_mp4_length;
reserved_size_b = sizeof(uint32_t);
range_body_size = sizeof(uint64_t) * 3;
u_char buf[range_body_size];
section_size_b = sizeof(uint32_t) * 2;
u_char section_size_buf[section_size_b];
new_section_count = 0;
small_content_length = 0;
if(out_handle.buffer == NULL)
out_handle.buffer = TSIOBufferCreate();
if(out_handle.reader == NULL)
out_handle.reader = TSIOBufferReaderAlloc(out_handle.buffer);
TSDebug(PLUGIN_NAME, "change_drm_header avail = %ld",TSIOBufferReaderAvail(drm_reader));
memset(this->section_length_arr, 0, section_count * sizeof(uint64_t));
if(!this->is_need_md) {
this->range_start = this->start;
new_mp4_length = this->range_end - this->start +1;
if(this->end) {
this->range_end = this->end;
new_mp4_length = this->range_end - this->range_start + 1;
}
} else {
this->range_start = start_offset;
new_mp4_length = this->original_file_size + adjustment;
}
mp4_set_64value(buf, this->range_start);
mp4_set_64value(buf + sizeof(uint64_t), this->range_end);
mp4_set_64value(buf + sizeof(uint64_t) * 2, this->original_file_size);
TSIOBufferWrite(drm_buffer, buf, range_body_size);
// TSDebug(PLUGIN_NAME, "change_drm_header range_start = %ld, range_end = %ld, original_file_size=%ld, start=%ld o_file_size=%ld",
// this->range_start, this->range_end, this->original_file_size,this->start,this->original_file_size);
if (new_mp4_length >= MP4_DES_MAX_COUNT * MP4_NEED_DES_LENGTH) {
new_section_count = MP4_DES_MAX_COUNT;
} else {
new_section_count = new_mp4_length / MP4_NEED_DES_LENGTH + 1;
}
this->section_size = sizeof(uint32_t)
+ sizeof(uint64_t) * new_section_count;
u_char section_buf[sizeof(uint64_t) * new_section_count];
for (i = 0; i < new_section_count - 1; i++) {
mp4_set_64value(section_buf + i * sizeof(uint64_t), MP4_DES_LENGTH);
}
if (new_section_count == MP4_DES_MAX_COUNT) {
mp4_set_64value(section_buf + i * sizeof(uint64_t), MP4_DES_LENGTH);
} else {
small_content_length = new_mp4_length % MP4_NEED_DES_LENGTH;
if(small_content_length < MP4_DES_ADD_LENGTH) {
this->small_des_add_length = small_content_length;
small_content_length = 0;
}
mp4_set_64value(section_buf + i * sizeof(uint64_t),(small_content_length +MP4_DES_ADD_LENGTH));
}
memcpy(this->section_length_arr,section_buf, new_section_count*sizeof(uint64_t));
mp4_set_32value(section_size_buf, this->section_size);
mp4_set_32value(section_size_buf +sizeof(uint32_t), new_section_count);
TSIOBufferWrite(drm_buffer, section_size_buf, section_size_b);
TSIOBufferWrite(drm_buffer, section_buf,sizeof(uint64_t) * new_section_count);
// TSDebug(PLUGIN_NAME, "change_drm_header avail = %ld",TSIOBufferReaderAvail(drm_reader));
this->drm_length += (new_section_count - this->section_count) * sizeof(uint64_t);
this->section_count = new_section_count;
u_char reserved_buf[reserved_size_b];
mp4_set_32value(reserved_buf, this->reserved_size);
TSIOBufferWrite(drm_buffer, reserved_buf, reserved_size_b);
// TSDebug(PLUGIN_NAME, "change_drm_header avail = %ld",TSIOBufferReaderAvail(drm_reader));
if (this->reserved_size > 0) {
TSIOBufferWrite(drm_buffer, reserved, this->reserved_size);
}
return 0;
}
int Mp4Meta::post_process_meta() {
off_t start_offset, adjustment;
uint32_t i, j;
int64_t avail;
Mp4Trak *trak;
if (this->trak_num == 0) {
return -1;
}
if (mdat_atom.buffer == NULL) {
return -1;
}
if(this->start <= this->passed) {
return -1;
}
this->drm_length = this->tag_pos + this->videoid_size + MP4_DES_ADD_LENGTH;
if (ftyp_atom.buffer) {
TSIOBufferCopy(des_buffer, ftyp_atom.reader,
TSIOBufferReaderAvail(ftyp_atom.reader), 0);
}
if (moov_atom.buffer) {
TSIOBufferCopy(des_buffer, moov_atom.reader,
TSIOBufferReaderAvail(moov_atom.reader), 0);
}
if (mvhd_atom.buffer) {
avail = TSIOBufferReaderAvail(mvhd_atom.reader);
TSIOBufferCopy(des_buffer, mvhd_atom.reader, avail, 0);
this->moov_size += avail;
}
start_offset = this->original_file_size;
for (i = 0; i < trak_num; i++) {
trak = trak_vec[i];
if (mp4_get_start_sample(trak) != 0) {
return -1;
}
if (mp4_update_stts_atom(trak) != 0) {
return -1;
}
if (mp4_update_stss_atom(trak) != 0) {
return -1;
}
mp4_update_ctts_atom(trak);
if (mp4_update_stsc_atom(trak) != 0) {
return -1;
}
if (mp4_update_stsz_atom(trak) != 0) {
return -1;
}
if (trak->atoms[MP4_CO64_DATA].buffer) { //chunk offset box
if (mp4_update_co64_atom(trak) != 0)
return -1;
} else if (mp4_update_stco_atom(trak) != 0) {
return -1;
}
mp4_update_stbl_atom(trak);
mp4_update_minf_atom(trak);
trak->size += trak->mdhd_size;
trak->size += trak->hdlr_size;
mp4_update_mdia_atom(trak);
trak->size += trak->tkhd_size;
mp4_update_trak_atom(trak);
this->moov_size += trak->size;
if (start_offset > trak->start_offset)
start_offset = trak->start_offset;
for (j = 0; j <= MP4_LAST_ATOM; j++) {
if (trak->atoms[j].buffer) {
TSIOBufferCopy(des_buffer, trak->atoms[j].reader,
TSIOBufferReaderAvail(trak->atoms[j].reader), 0);
}
}
mp4_update_tkhd_duration(trak);
mp4_update_mdhd_duration(trak);
}
this->moov_size += 8;
mp4_reader_set_32value(moov_atom.reader, 0, this->moov_size);
this->content_length += this->moov_size;
adjustment = this->ftyp_size + this->moov_size
+ mp4_update_mdat_atom(start_offset) - start_offset;
change_drm_header(start_offset, adjustment);
this->content_length += this->drm_length;
TSIOBufferCopy(des_buffer, mdat_atom.reader,
TSIOBufferReaderAvail(mdat_atom.reader), 0);
for (i = 0; i < trak_num; i++) {
trak = trak_vec[i];
if (trak->atoms[MP4_CO64_DATA].buffer) {
mp4_adjust_co64_atom(trak, adjustment);
} else {
mp4_adjust_stco_atom(trak, adjustment);
}
}
mp4_update_mvhd_duration();
return 0;
}
/*
* -1: error
* 0: unfinished
* 1: success.
*/
int Mp4Meta::parse_root_atoms() {
int i, ret, rc;
int64_t atom_size, atom_header_size;
char buf[64];
char *atom_header, *atom_name;
memset(buf, 0, sizeof(buf));
for (;;) {
if (meta_avail < (int64_t) sizeof(uint32_t))
return 0;
IOBufferReaderCopy(meta_reader, buf, sizeof(mp4_atom_header64));
atom_size = mp4_get_32value(buf);
if (atom_size == 0) { //如果size 大小为0 说明是最后一个box 直接结束
return 1;
}
atom_header = buf;
if (atom_size < (int64_t) sizeof(mp4_atom_header)) { //判断是否满足一个32位头大小，如果小于的话，一定是64位的
if (atom_size == 1) { //如果size 为1 说明是64位的
if (meta_avail < (int64_t) sizeof(mp4_atom_header64)) { //如果总数据小于64 box header 大小，就再次等待
return 0;
}
} else { //如果不满足，说明解释失败，直接返回error
return -1;
}
atom_size = mp4_get_64value(atom_header + 8);
atom_header_size = sizeof(mp4_atom_header64);
} else { // regular atom
if (meta_avail < (int64_t) sizeof(mp4_atom_header)) // not enough for atom header 再次等待数据过来
return 0;
atom_header_size = sizeof(mp4_atom_header);
}
atom_name = atom_header + 4;
if (atom_size + this->passed > this->cl) { //超过总长度
return -1;
}
for (i = 0; mp4_atoms[i].name; i++) { // box header + box body
if (memcmp(atom_name, mp4_atoms[i].name, 4) == 0) {
ret = (this->*mp4_atoms[i].handler)(atom_header_size,
atom_size - atom_header_size); // -1: error, 0: unfinished, 1: success
if (ret <= 0) {
return ret;
} else if (meta_complete) { // success
return 1;
}
goto next;
}
}
// nonsignificant atom box
rc = mp4_atom_next(atom_size, true); // 0: unfinished, 1: success
if (rc == 0) {
return rc;
}
next: continue;
}
return 1;
}
int Mp4Meta::mp4_atom_next(int64_t atom_size, bool wait) {
if (meta_avail >= atom_size) {
mp4_meta_consume(atom_size);
return 1;
}
if (wait) {
wait_next = atom_size;
return 0;
}
return -1;
}
/*
* -1: error
* 1: success
*/
int Mp4Meta::mp4_read_atom(mp4_atom_handler *atom, int64_t size) {
int i, ret, rc;
int64_t atom_size, atom_header_size;
char buf[32];
char *atom_header, *atom_name;
if (meta_avail < size) // data insufficient, not reasonable for internal atom box. 数据应该是全的
return -1;
while (size > 0) {
if (meta_avail < (int64_t) sizeof(uint32_t)) // data insufficient, not reasonable for internal atom box.
return -1;
IOBufferReaderCopy(meta_reader, buf, sizeof(mp4_atom_header64));
atom_size = mp4_get_32value(buf);
if (atom_size == 0) {
return 1;
}
atom_header = buf;
if (atom_size < (int64_t) sizeof(mp4_atom_header)) { //判断是32位还是64位的
if (atom_size == 1) {
if (meta_avail < (int64_t) sizeof(mp4_atom_header64)) {
return -1;
}
} else {
return -1;
}
atom_size = mp4_get_64value(atom_header + 8);
atom_header_size = sizeof(mp4_atom_header64);
} else { // regular atom
if (meta_avail < (int64_t) sizeof(mp4_atom_header))
return -1;
atom_header_size = sizeof(mp4_atom_header);
}
atom_name = atom_header + 4;
if (atom_size + this->passed > this->cl) { //判断一下总长度
return -1;
}
for (i = 0; atom[i].name; i++) {
if (memcmp(atom_name, atom[i].name, 4) == 0) {
if (meta_avail < atom_size)
return -1;
ret = (this->*atom[i].handler)(atom_header_size,
atom_size - atom_header_size); // -1: error, 0: success.
if (ret < 0) {
return ret;
}
goto next;
}
}
// insignificant atom box
rc = mp4_atom_next(atom_size, false); //可以忽视的box
if (rc < 0) {
return rc;
}
next: size -= atom_size;
continue;
}
return 1;
}
int Mp4Meta::mp4_read_ftyp_atom(int64_t atom_header_size,
int64_t atom_data_size) //拷贝ftyp数据，不需要做任何处理
{
int64_t atom_size;
if (atom_data_size > MP4_MIN_BUFFER_SIZE)
return -1;
atom_size = atom_header_size + atom_data_size;
if (meta_avail < atom_size) { // data unsufficient, reasonable from the first level
return 0;
}
ftyp_atom.buffer = TSIOBufferCreate();
ftyp_atom.reader = TSIOBufferReaderAlloc(ftyp_atom.buffer);
TSIOBufferCopy(ftyp_atom.buffer, meta_reader, atom_size, 0);
mp4_meta_consume(atom_size);
content_length = atom_size;
ftyp_size = atom_size;
return 1;
}
int Mp4Meta::mp4_read_moov_atom(int64_t atom_header_size,
int64_t atom_data_size) //读取moov
{
int64_t atom_size;
int ret;
if (mdat_atom.buffer != NULL) // not reasonable for streaming media 如果先读的mdata 的话，就当失败来处理
return -1;
atom_size = atom_header_size + atom_data_size;
if (atom_data_size >= MP4_MAX_BUFFER_SIZE) //如果大于限定的buffer 当出错处理
return -1;
if (meta_avail < atom_size) { // data unsufficient, wait //数据不全，继续等待
return 0;
}
moov_atom.buffer = TSIOBufferCreate();
moov_atom.reader = TSIOBufferReaderAlloc(moov_atom.buffer);
TSIOBufferCopy(moov_atom.buffer, meta_reader, atom_header_size, 0); //先拷贝 BOX HEADER
mp4_meta_consume(atom_header_size);
ret = mp4_read_atom(mp4_moov_atoms, atom_data_size); //开始解析mvhd + track.........
return ret;
}
int Mp4Meta::mp4_read_mvhd_atom(int64_t atom_header_size,
int64_t atom_data_size) {
int64_t atom_size;
uint32_t timescale;
mp4_mvhd_atom *mvhd;
mp4_mvhd64_atom mvhd64;
if (sizeof(mp4_mvhd_atom) - 8 > (size_t) atom_data_size)
return -1;
IOBufferReaderCopy(meta_reader, &mvhd64, sizeof(mp4_mvhd64_atom));
mvhd = (mp4_mvhd_atom *) &mvhd64;
if (mvhd->version[0] == 0) {
timescale = mp4_get_32value(mvhd->timescale);
} else { // 64-bit duration
timescale = mp4_get_32value(mvhd64.timescale);
}
this->timescale = timescale; //获取一下整部电影的time scale
atom_size = atom_header_size + atom_data_size;
mvhd_atom.buffer = TSIOBufferCreate();
mvhd_atom.reader = TSIOBufferReaderAlloc(mvhd_atom.buffer);
TSIOBufferCopy(mvhd_atom.buffer, meta_reader, atom_size, 0);
mp4_meta_consume(atom_size);
return 1;
}
int Mp4Meta::mp4_read_trak_atom(int64_t atom_header_size,
int64_t atom_data_size) //读取track
{