-
Notifications
You must be signed in to change notification settings - Fork 345
/
dtvrecorder.cpp
1457 lines (1259 loc) · 46.4 KB
/
dtvrecorder.cpp
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
/**
* DTVRecorder -- base class for Digital Televison recorders
* Copyright 2003-2004 by Brandon Beattie, Doug Larrick,
* Jason Hoos, and Daniel Thor Kristjansson
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "atscstreamdata.h"
#include "mpegstreamdata.h"
#include "dvbstreamdata.h"
#include "dtvrecorder.h"
#include "programinfo.h"
#include "mythlogging.h"
#include "mpegtables.h"
#include "ringbuffer.h"
#include "tv_rec.h"
#include "mythsystemevent.h"
extern "C" {
#include "libavcodec/mpegvideo.h"
}
#define LOC ((tvrec) ? \
QString("DTVRec[%1]: ").arg(tvrec->GetCaptureCardNum()) : \
QString("DTVRec(0x%1): ").arg(intptr_t(this),0,16))
const uint DTVRecorder::kMaxKeyFrameDistance = 80;
/** \class DTVRecorder
* \brief This is a specialization of RecorderBase used to
* handle MPEG-2, MPEG-4, MPEG-4 AVC, DVB and ATSC streams.
*
* \sa DBox2Recorder, DVBRecorder, FirewireRecorder,
HDHRRecoreder, IPTVRecorder
*/
DTVRecorder::DTVRecorder(TVRec *rec) :
RecorderBase(rec),
// file handle for stream
_stream_fd(-1),
_recording_type("all"),
// used for scanning pes headers for keyframes
_start_code(0xffffffff), _first_keyframe(-1),
_last_gop_seen(0), _last_seq_seen(0),
_last_keyframe_seen(0),
_audio_bytes_remaining(0), _video_bytes_remaining(0),
_other_bytes_remaining(0),
// MPEG2 parser information
_progressive_sequence(0),
_repeat_pict(0),
// H.264 support
_pes_synced(false),
_seen_sps(false),
// settings
_wait_for_keyframe_option(true),
_has_written_other_keyframe(false),
// state
_error(),
_stream_data(NULL),
// TS packet buffer
// keyframe TS buffer
_buffer_packets(false),
// general recorder stuff
_pid_lock(QMutex::Recursive),
_input_pat(NULL),
_input_pmt(NULL),
_has_no_av(false),
// statistics
_use_pts(false),
_packet_count(0),
_continuity_error_count(0),
_frames_seen_count(0), _frames_written_count(0),
_total_duration(0),
_td_base(0),
_td_tick_count(0),
_td_tick_framerate(0)
{
SetPositionMapType(MARK_GOP_BYFRAME);
_payload_buffer.reserve(TSPacket::kSize * (50 + 1));
ResetForNewFile();
memset(_stream_id, 0, sizeof(_stream_id));
memset(_pid_status, 0, sizeof(_pid_status));
memset(_continuity_counter, 0xff, sizeof(_continuity_counter));
}
DTVRecorder::~DTVRecorder()
{
StopRecording();
SetStreamData(NULL);
if (_input_pat)
{
delete _input_pat;
_input_pat = NULL;
}
if (_input_pmt)
{
delete _input_pmt;
_input_pmt = NULL;
}
}
void DTVRecorder::SetOption(const QString &name, const QString &value)
{
if (name == "recordingtype")
{
_recording_type = value;
_recording_type.detach();
}
else
RecorderBase::SetOption(name, value);
}
/** \fn DTVRecorder::SetOption(const QString&,int)
* \brief handles the "wait_for_seqstart" option.
*/
void DTVRecorder::SetOption(const QString &name, int value)
{
if (name == "wait_for_seqstart")
_wait_for_keyframe_option = (value == 1);
else
RecorderBase::SetOption(name, value);
}
void DTVRecorder::SetOptionsFromProfile(RecordingProfile *profile,
const QString &videodev,
const QString&, const QString&)
{
SetOption("videodevice", videodev);
DTVRecorder::SetOption("tvformat", gCoreContext->GetSetting("TVFormat"));
SetStrOption(profile, "recordingtype");
}
/** \fn DTVRecorder::FinishRecording(void)
* \brief Flushes the ringbuffer, and if this is not a live LiveTV
* recording saves the position map and filesize.
*/
void DTVRecorder::FinishRecording(void)
{
if (ringBuffer)
ringBuffer->WriterFlush();
if (curRecording)
{
if (ringBuffer)
curRecording->SaveFilesize(ringBuffer->GetRealFileSize());
SavePositionMap(true);
curRecording->SaveTotalDuration((int64_t)(_total_duration * 1000));
curRecording->SaveTotalFrames(_frames_written_count);
}
}
void DTVRecorder::ResetForNewFile(void)
{
LOG(VB_RECORD, LOG_INFO, LOC + "ResetForNewFile(void)");
QMutexLocker locker(&positionMapLock);
// _seen_psp and m_h264_parser should
// not be reset here. This will only be called just as
// we're seeing the first packet of a new keyframe for
// writing to the new file and anything that makes the
// recorder think we're waiting on another keyframe will
// send significant amounts of good data to /dev/null.
// -- Daniel Kristjansson 2011-02-26
_start_code = 0xffffffff;
_first_keyframe = -1;
_has_written_other_keyframe = false;
_last_keyframe_seen = 0;
_last_gop_seen = 0;
_last_seq_seen = 0;
_audio_bytes_remaining = 0;
_video_bytes_remaining = 0;
_other_bytes_remaining = 0;
//_recording
_error = QString();
_progressive_sequence = 0;
_repeat_pict = 0;
//_pes_synced
//_seen_sps
positionMap.clear();
positionMapDelta.clear();
durationMap.clear();
durationMapDelta.clear();
locker.unlock();
ClearStatistics();
}
void DTVRecorder::ClearStatistics(void)
{
RecorderBase::ClearStatistics();
memset(_ts_count, 0, sizeof(_ts_count));
for (int i = 0; i < 256; ++i)
_ts_last[i] = -1LL;
for (int i = 0; i < 256; ++i)
_ts_first[i] = -1LL;
//_ts_first_dt -- doesn't need to be cleared only used if _ts_first>=0
_packet_count.fetchAndStoreRelaxed(0);
_continuity_error_count.fetchAndStoreRelaxed(0);
_frames_seen_count = 0;
_frames_written_count = 0;
_total_duration = 0;
_td_base = 0;
_td_tick_count = 0;
_td_tick_framerate = FrameRate(0);
}
// documented in recorderbase.h
void DTVRecorder::Reset(void)
{
LOG(VB_RECORD, LOG_INFO, LOC + "Reset(void)");
ResetForNewFile();
_start_code = 0xffffffff;
if (curRecording)
{
curRecording->ClearPositionMap(MARK_GOP_BYFRAME);
curRecording->ClearPositionMap(MARK_DURATION_MS);
}
}
void DTVRecorder::SetStreamData(MPEGStreamData *data)
{
if (data == _stream_data)
return;
MPEGStreamData *old_data = _stream_data;
_stream_data = data;
if (old_data)
delete old_data;
if (_stream_data)
InitStreamData();
}
void DTVRecorder::InitStreamData(void)
{
_stream_data->AddMPEGSPListener(this);
_stream_data->AddMPEGListener(this);
DVBStreamData *dvb = dynamic_cast<DVBStreamData*>(_stream_data);
if (dvb)
dvb->AddDVBMainListener(this);
ATSCStreamData *atsc = dynamic_cast<ATSCStreamData*>(_stream_data);
if (atsc && atsc->DesiredMinorChannel())
atsc->SetDesiredChannel(atsc->DesiredMajorChannel(),
atsc->DesiredMinorChannel());
else if (_stream_data->DesiredProgram() >= 0)
_stream_data->SetDesiredProgram(_stream_data->DesiredProgram());
}
void DTVRecorder::BufferedWrite(const TSPacket &tspacket, bool insert)
{
if (!insert) // PAT/PMT may need inserted in front of any buffered data
{
// delay until first GOP to avoid decoder crash on res change
if (!_buffer_packets && _wait_for_keyframe_option &&
_first_keyframe < 0)
return;
if (curRecording && timeOfFirstDataIsSet.testAndSetRelaxed(0,1))
{
QMutexLocker locker(&statisticsLock);
timeOfFirstData = MythDate::current();
timeOfLatestData = MythDate::current();
timeOfLatestDataTimer.start();
}
int val = timeOfLatestDataCount.fetchAndAddRelaxed(1);
int thresh = timeOfLatestDataPacketInterval.fetchAndAddRelaxed(0);
if (val > thresh)
{
QMutexLocker locker(&statisticsLock);
uint elapsed = timeOfLatestDataTimer.restart();
int interval = thresh;
if (elapsed > kTimeOfLatestDataIntervalTarget + 250)
interval = timeOfLatestDataPacketInterval
.fetchAndStoreRelaxed(thresh * 4 / 5);
else if (elapsed + 250 < kTimeOfLatestDataIntervalTarget)
interval = timeOfLatestDataPacketInterval
.fetchAndStoreRelaxed(thresh * 9 / 8);
timeOfLatestDataCount.fetchAndStoreRelaxed(1);
timeOfLatestData = MythDate::current();
LOG(VB_RECORD, LOG_DEBUG, LOC +
QString("Updating timeOfLatestData elapsed(%1) interval(%2)")
.arg(elapsed).arg(interval));
}
// Do we have to buffer the packet for exact keyframe detection?
if (_buffer_packets)
{
int idx = _payload_buffer.size();
_payload_buffer.resize(idx + TSPacket::kSize);
memcpy(&_payload_buffer[idx], tspacket.data(), TSPacket::kSize);
return;
}
// We are free to write the packet, but if we have buffered packet[s]
// we have to write them first...
if (!_payload_buffer.empty())
{
if (ringBuffer)
ringBuffer->Write(&_payload_buffer[0], _payload_buffer.size());
_payload_buffer.clear();
}
}
if (ringBuffer)
ringBuffer->Write(tspacket.data(), TSPacket::kSize);
}
enum { kExtractPTS, kExtractDTS };
static int64_t extract_timestamp(
const uint8_t *bufptr, int bytes_left, int pts_or_dts)
{
if (bytes_left < 4)
return -1LL;
bool has_pts = bufptr[3] & 0x80;
int offset = 5;
if (((kExtractPTS == pts_or_dts) && !has_pts) || (offset + 5 > bytes_left))
return -1LL;
bool has_dts = bufptr[3] & 0x40;
if (kExtractDTS == pts_or_dts)
{
if (!has_dts)
return -1LL;
offset += has_pts ? 5 : 0;
if (offset + 5 > bytes_left)
return -1LL;
}
return ((uint64_t(bufptr[offset+0] & 0x0e) << 29) |
(uint64_t(bufptr[offset+1] ) << 22) |
(uint64_t(bufptr[offset+2] & 0xfe) << 14) |
(uint64_t(bufptr[offset+3] ) << 7) |
(uint64_t(bufptr[offset+4] & 0xfe) >> 1));
}
static QDateTime ts_to_qdatetime(
uint64_t pts, uint64_t pts_first, QDateTime &pts_first_dt)
{
if (pts < pts_first)
pts += 0x1FFFFFFFFLL;
QDateTime dt = pts_first_dt;
return dt.addMSecs((pts - pts_first)/90);
}
static const FrameRate frameRateMap[16] = {
FrameRate(0), FrameRate(24000, 1001), FrameRate(24),
FrameRate(25), FrameRate(30000, 1001), FrameRate(30),
FrameRate(50), FrameRate(60000, 1001), FrameRate(60),
FrameRate(0), FrameRate(0), FrameRate(0),
FrameRate(0), FrameRate(0), FrameRate(0),
FrameRate(0)
};
/** \fn DTVRecorder::FindMPEG2Keyframes(const TSPacket* tspacket)
* \brief Locates the keyframes and saves them to the position map.
*
* This searches for three magic integers in the stream.
* The picture start code 0x00000100, the GOP code 0x000001B8,
* and the sequence start code 0x000001B3. The GOP code is
* prefered, but is only required of MPEG1 streams, the
* sequence start code is a decent fallback for MPEG2
* streams, and if all else fails we just look for the picture
* start codes and call every 16th frame a keyframe.
*
* NOTE: This does not only find keyframes but also tracks the
* total frames as well. At least a couple times seeking
* has been broken by short-circuiting the search once
* a keyframe stream id has been found. This may work on
* some channels, but will break on others so algorithmic
* optimizations should be done with great care.
*
* \code
* PES header format
* byte 0 byte 1 byte 2 byte 3 [byte 4 byte 5]
* 0x00 0x00 0x01 PESStreamID PES packet length
* \endcode
*
* \return Returns true if packet[s] should be output.
*/
bool DTVRecorder::FindMPEG2Keyframes(const TSPacket* tspacket)
{
if (!tspacket->HasPayload()) // no payload to scan
return _first_keyframe >= 0;
if (!ringBuffer)
return _first_keyframe >= 0;
// if packet contains start of PES packet, start
// looking for first byte of MPEG start code (3 bytes 0 0 1)
// otherwise, pick up search where we left off.
const bool payloadStart = tspacket->PayloadStart();
_start_code = (payloadStart) ? 0xffffffff : _start_code;
// Just make these local for efficiency reasons (gcc not so smart..)
const uint maxKFD = kMaxKeyFrameDistance;
bool hasFrame = false;
bool hasKeyFrame = false;
uint aspectRatio = 0;
uint height = 0;
uint width = 0;
FrameRate frameRate(0);
// Scan for PES header codes; specifically picture_start
// sequence_start (SEQ) and group_start (GOP).
// 00 00 01 00: picture_start_code
// 00 00 01 B8: group_start_code
// 00 00 01 B3: seq_start_code
// 00 00 01 B5: ext_start_code
// (there are others that we don't care about)
const uint8_t *bufptr = tspacket->data() + tspacket->AFCOffset();
const uint8_t *bufend = tspacket->data() + TSPacket::kSize;
int ext_type, bytes_left;
_repeat_pict = 0;
while (bufptr < bufend)
{
bufptr = avpriv_mpv_find_start_code(bufptr, bufend, &_start_code);
bytes_left = bufend - bufptr;
if ((_start_code & 0xffffff00) == 0x00000100)
{
// At this point we have seen the start code 0 0 1
// the next byte will be the PES packet stream id.
const int stream_id = _start_code & 0x000000ff;
if (PESStreamID::PictureStartCode == stream_id)
hasFrame = true;
else if (PESStreamID::GOPStartCode == stream_id)
{
_last_gop_seen = _frames_seen_count;
hasKeyFrame |= true;
}
else if (PESStreamID::SequenceStartCode == stream_id)
{
_last_seq_seen = _frames_seen_count;
hasKeyFrame |= (_last_gop_seen + maxKFD)<_frames_seen_count;
// Look for aspectRatio changes and store them in the database
aspectRatio = (bufptr[3] >> 4);
// Get resolution
height = ((bufptr[1] & 0xf) << 8) | bufptr[2];
width = (bufptr[0] <<4) | (bufptr[1]>>4);
frameRate = frameRateMap[(bufptr[3] & 0x0000000f)];
}
else if (PESStreamID::MPEG2ExtensionStartCode == stream_id)
{
if (bytes_left >= 1)
{
ext_type = (bufptr[0] >> 4);
switch(ext_type)
{
case 0x1: /* sequence extension */
if (bytes_left >= 6)
{
_progressive_sequence = bufptr[1] & (1 << 3);
}
break;
case 0x8: /* picture coding extension */
if (bytes_left >= 5)
{
//int picture_structure = bufptr[2]&3;
int top_field_first = bufptr[3] & (1 << 7);
int repeat_first_field = bufptr[3] & (1 << 1);
int progressive_frame = bufptr[4] & (1 << 7);
/* check if we must repeat the frame */
_repeat_pict = 1;
if (repeat_first_field)
{
if (_progressive_sequence)
{
if (top_field_first)
_repeat_pict = 5;
else
_repeat_pict = 3;
}
else if (progressive_frame)
{
_repeat_pict = 2;
}
}
// The _repeat_pict code above matches
// mpegvideo_extract_headers(), but the
// code in mpeg_field_start() computes a
// value one less, which seems correct.
--_repeat_pict;
}
break;
}
}
}
if ((stream_id >= PESStreamID::MPEGVideoStreamBegin) &&
(stream_id <= PESStreamID::MPEGVideoStreamEnd))
{
int64_t pts = extract_timestamp(
bufptr, bytes_left, kExtractPTS);
int64_t dts = extract_timestamp(
bufptr, bytes_left, kExtractPTS);
HandleTimestamps(stream_id, pts, dts);
}
}
}
if (hasFrame && !hasKeyFrame)
{
// If we have seen kMaxKeyFrameDistance frames since the
// last GOP or SEQ stream_id, then pretend this picture
// is a keyframe. We may get artifacts but at least
// we will be able to skip frames.
hasKeyFrame = !(_frames_seen_count & 0xf);
hasKeyFrame &= (_last_gop_seen + maxKFD) < _frames_seen_count;
hasKeyFrame &= (_last_seq_seen + maxKFD) < _frames_seen_count;
}
// _buffer_packets will only be true if a payload start has been seen
if (hasKeyFrame && (_buffer_packets || _first_keyframe >= 0))
{
LOG(VB_RECORD, LOG_DEBUG, LOC + QString
("Keyframe @ %1 + %2 = %3")
.arg(ringBuffer->GetWritePosition())
.arg(_payload_buffer.size())
.arg(ringBuffer->GetWritePosition() + _payload_buffer.size()));
_last_keyframe_seen = _frames_seen_count;
HandleKeyframe(0);
}
if (hasFrame)
{
LOG(VB_RECORD, LOG_DEBUG, LOC + QString
("Frame @ %1 + %2 = %3")
.arg(ringBuffer->GetWritePosition())
.arg(_payload_buffer.size())
.arg(ringBuffer->GetWritePosition() + _payload_buffer.size()));
_buffer_packets = false; // We now know if it is a keyframe, or not
_frames_seen_count++;
if (!_wait_for_keyframe_option || _first_keyframe >= 0)
UpdateFramesWritten();
else
{
/* Found a frame that is not a keyframe, and we want to
* start on a keyframe */
_payload_buffer.clear();
}
}
if ((aspectRatio > 0) && (aspectRatio != m_videoAspect))
{
m_videoAspect = aspectRatio;
AspectChange((AspectRatio)aspectRatio, _frames_written_count);
}
if (height && width && (height != m_videoHeight || m_videoWidth != width))
{
m_videoHeight = height;
m_videoWidth = width;
ResolutionChange(width, height, _frames_written_count);
}
if (frameRate.isNonzero() && frameRate != m_frameRate)
{
m_frameRate = frameRate;
LOG(VB_RECORD, LOG_INFO, LOC +
QString("FindMPEG2Keyframes: frame rate = %1")
.arg(frameRate.toDouble() * 1000));
FrameRateChange(frameRate.toDouble() * 1000, _frames_written_count);
}
return _first_keyframe >= 0;
}
void DTVRecorder::HandleTimestamps(int stream_id, int64_t pts, int64_t dts)
{
if (pts < 0)
{
_ts_last[stream_id] = -1;
return;
}
if ((dts < 0) && !_use_pts)
{
_ts_last[stream_id] = -1;
_use_pts = true;
LOG(VB_RECORD, LOG_DEBUG,
"Switching from dts tracking to pts tracking." +
QString("TS count is %1").arg(_ts_count[stream_id]));
}
int64_t ts = dts;
int64_t gap_threshold = 90000; // 1 second
if (_use_pts)
{
ts = dts;
gap_threshold = 2*90000; // two seconds, compensate for GOP ordering
}
if (_ts_last[stream_id] >= 0)
{
int64_t diff = ts - _ts_last[stream_id];
if ((diff < 0) && (diff < (10 * -90000)))
diff += 0x1ffffffffLL;
if (diff < 0)
diff = -diff;
if (diff > gap_threshold)
{
QMutexLocker locker(&statisticsLock);
recordingGaps.push_back(
RecordingGap(
ts_to_qdatetime(
_ts_last[stream_id], _ts_first[stream_id],
_ts_first_dt[stream_id]),
ts_to_qdatetime(
ts, _ts_first[stream_id], _ts_first_dt[stream_id])));
LOG(VB_RECORD, LOG_DEBUG, LOC + QString("Inserted gap %1 dur %2")
.arg(recordingGaps.back().toString()).arg(diff/90000.0));
}
}
_ts_last[stream_id] = ts;
if (_ts_count[stream_id] < 30)
{
if (!_ts_count[stream_id])
{
_ts_first[stream_id] = ts;
_ts_first_dt[stream_id] = MythDate::current();
}
else if (ts < _ts_first[stream_id])
{
_ts_first[stream_id] = ts;
_ts_first_dt[stream_id] = MythDate::current();
}
}
_ts_count[stream_id]++;
}
void DTVRecorder::UpdateFramesWritten(void)
{
_frames_written_count++;
if (!_td_tick_framerate.isNonzero())
_td_tick_framerate = m_frameRate;
if (_td_tick_framerate != m_frameRate)
{
_td_base = _total_duration;
_td_tick_count = 0;
_td_tick_framerate = m_frameRate;
}
_td_tick_count += (2 + _repeat_pict);
if (_td_tick_framerate.isNonzero())
{
_total_duration = _td_base + (int64_t) 500 * _td_tick_count *
_td_tick_framerate.getDen() / (double) _td_tick_framerate.getNum();
}
if (_frames_written_count < 2000 || _frames_written_count % 1000 == 0)
LOG(VB_RECORD, LOG_DEBUG,
QString("count=%1 m_frameRate=%2 tick_frameRate=%3 "
"tick_cnt=%4 tick_base=%5 _total_dur=%6")
.arg(_frames_written_count)
.arg(m_frameRate.toString())
.arg(_td_tick_framerate.toString())
.arg(_td_tick_count)
.arg(_td_base)
.arg(_total_duration));
}
bool DTVRecorder::FindAudioKeyframes(const TSPacket*)
{
bool hasKeyFrame = false;
if (!ringBuffer || (GetStreamData()->VideoPIDSingleProgram() <= 0x1fff))
return hasKeyFrame;
static const uint64_t msec_per_day = 24 * 60 * 60 * 1000ULL;
const double frame_interval = (1000.0 / video_frame_rate);
uint64_t elapsed = (uint64_t) max(_audio_timer.elapsed(), 0);
uint64_t expected_frame =
(uint64_t) ((double)elapsed / frame_interval);
while (_frames_seen_count > expected_frame + 10000)
expected_frame += (uint64_t) ((double)msec_per_day / frame_interval);
if (!_frames_seen_count || (_frames_seen_count < expected_frame))
{
if (!_frames_seen_count)
_audio_timer.start();
_buffer_packets = false;
_frames_seen_count++;
if (1 == (_frames_seen_count & 0x7))
{
_last_keyframe_seen = _frames_seen_count;
HandleKeyframe(_payload_buffer.size());
hasKeyFrame = true;
}
if (!_wait_for_keyframe_option || _first_keyframe>=0)
UpdateFramesWritten();
}
return hasKeyFrame;
}
/// Non-Audio/Video data. For streams which contain no audio/video,
/// write just 1 key-frame at the start.
bool DTVRecorder::FindOtherKeyframes(const TSPacket *tspacket)
{
if (!ringBuffer || (GetStreamData()->VideoPIDSingleProgram() <= 0x1fff))
return true;
if (_has_written_other_keyframe)
return true;
LOG(VB_RECORD, LOG_INFO, LOC + "DSMCC - FindOtherKeyframes() - "
"generating initial key-frame");
_frames_seen_count++;
UpdateFramesWritten();
_last_keyframe_seen = _frames_seen_count;
HandleKeyframe(_payload_buffer.size());
_has_written_other_keyframe = true;
return true;
}
/** \fn DTVRecorder::HandleKeyframe(uint64_t)
* \brief This save the current frame to the position maps
* and handles ringbuffer switching.
*/
void DTVRecorder::HandleKeyframe(int64_t extra)
{
if (!ringBuffer)
return;
// Perform ringbuffer switch if needed.
CheckForRingBufferSwitch();
uint64_t frameNum = _frames_written_count;
if (_first_keyframe < 0)
{
_first_keyframe = frameNum;
SendMythSystemRecEvent("REC_STARTED_WRITING", curRecording);
}
// Add key frame to position map
positionMapLock.lock();
if (!positionMap.contains(frameNum))
{
int64_t startpos = ringBuffer->GetWritePosition() + extra;
// Don't put negative offsets into the database, they get munged into
// MAX_INT64 - offset, which is an exceedingly large number, and
// certainly not valid.
if (startpos >= 0)
{
positionMapDelta[frameNum] = startpos;
positionMap[frameNum] = startpos;
durationMap[frameNum] = _total_duration + 0.5;
durationMapDelta[frameNum] = _total_duration + 0.5;
}
}
positionMapLock.unlock();
}
/** \fn DTVRecorder::FindH264Keyframes(const TSPacket*)
* \brief This searches the TS packet to identify keyframes.
* \param TSPacket Pointer the the TS packet data.
* \return Returns true if a keyframe has been found.
*/
bool DTVRecorder::FindH264Keyframes(const TSPacket *tspacket)
{
if (!tspacket->HasPayload()) // no payload to scan
return _first_keyframe >= 0;
if (!ringBuffer)
{
LOG(VB_GENERAL, LOG_ERR, LOC + "FindH264Keyframes: No ringbuffer");
return _first_keyframe >= 0;
}
const bool payloadStart = tspacket->PayloadStart();
if (payloadStart)
{
// reset PES sync state
_pes_synced = false;
_start_code = 0xffffffff;
}
uint aspectRatio = 0;
uint height = 0;
uint width = 0;
FrameRate frameRate(0);
bool hasFrame = false;
bool hasKeyFrame = false;
// scan for PES packets and H.264 NAL units
uint i = tspacket->AFCOffset();
for (; i < TSPacket::kSize; ++i)
{
// special handling required when a new PES packet begins
if (payloadStart && !_pes_synced)
{
// bounds check
if (i + 2 >= TSPacket::kSize)
{
LOG(VB_GENERAL, LOG_ERR, LOC +
"PES packet start code may overflow to next TS packet, "
"aborting keyframe search");
break;
}
// must find the PES start code
if (tspacket->data()[i++] != 0x00 ||
tspacket->data()[i++] != 0x00 ||
tspacket->data()[i++] != 0x01)
{
LOG(VB_GENERAL, LOG_ERR, LOC +
"PES start code not found in TS packet with PUSI set");
break;
}
// bounds check
if (i + 5 >= TSPacket::kSize)
{
LOG(VB_GENERAL, LOG_ERR, LOC +
"PES packet headers overflow to next TS packet, "
"aborting keyframe search");
break;
}
// now we need to compute where the PES payload begins
// skip past the stream_id (+1)
// the next two bytes are the PES packet length (+2)
// after that, one byte of PES packet control bits (+1)
// after that, one byte of PES header flags bits (+1)
// and finally, one byte for the PES header length
const unsigned char pes_header_length = tspacket->data()[i + 5];
// bounds check
if ((i + 6 + pes_header_length) >= TSPacket::kSize)
{
LOG(VB_GENERAL, LOG_ERR, LOC +
"PES packet headers overflow to next TS packet, "
"aborting keyframe search");
break;
}
// we now know where the PES payload is
// normally, we should have used 6, but use 5 because the for
// loop will bump i
i += 5 + pes_header_length;
_pes_synced = true;
#if 0
LOG(VB_RECORD, LOG_DEBUG, LOC + "PES synced");
#endif
continue;
}
// ain't going nowhere if we're not PES synced
if (!_pes_synced)
break;
// scan for a NAL unit start code
uint32_t bytes_used = m_h264_parser.addBytes
(tspacket->data() + i, TSPacket::kSize - i,
ringBuffer->GetWritePosition());
i += (bytes_used - 1);
if (m_h264_parser.stateChanged())
{
if (m_h264_parser.onFrameStart() &&
m_h264_parser.FieldType() != H264Parser::FIELD_BOTTOM)
{
hasKeyFrame = m_h264_parser.onKeyFrameStart();
hasFrame = true;
_seen_sps |= hasKeyFrame;
width = m_h264_parser.pictureWidth();
height = m_h264_parser.pictureHeight();
aspectRatio = m_h264_parser.aspectRatio();
m_h264_parser.getFrameRate(frameRate);
}
}
} // for (; i < TSPacket::kSize; ++i)
// _buffer_packets will only be true if a payload start has been seen
if (hasKeyFrame && (_buffer_packets || _first_keyframe >= 0))
{
LOG(VB_RECORD, LOG_DEBUG, LOC + QString
("Keyframe @ %1 + %2 = %3 AU %4")
.arg(ringBuffer->GetWritePosition())
.arg(_payload_buffer.size())
.arg(ringBuffer->GetWritePosition() + _payload_buffer.size())
.arg(m_h264_parser.keyframeAUstreamOffset()));
_last_keyframe_seen = _frames_seen_count;
HandleH264Keyframe();
}
if (hasFrame)
{
LOG(VB_RECORD, LOG_DEBUG, LOC + QString
("Frame @ %1 + %2 = %3 AU %4")
.arg(ringBuffer->GetWritePosition())
.arg(_payload_buffer.size())
.arg(ringBuffer->GetWritePosition() + _payload_buffer.size())
.arg(m_h264_parser.keyframeAUstreamOffset()));
_buffer_packets = false; // We now know if this is a keyframe
_frames_seen_count++;
if (!_wait_for_keyframe_option || _first_keyframe >= 0)
UpdateFramesWritten();
else
{
/* Found a frame that is not a keyframe, and we want to
* start on a keyframe */
_payload_buffer.clear();
}
}
if ((aspectRatio > 0) && (aspectRatio != m_videoAspect))
{
m_videoAspect = aspectRatio;
AspectChange((AspectRatio)aspectRatio, _frames_written_count);
}
if (height && width && (height != m_videoHeight || m_videoWidth != width))
{
m_videoHeight = height;
m_videoWidth = width;
ResolutionChange(width, height, _frames_written_count);
}
if (frameRate.isNonzero() && frameRate != m_frameRate)
{
LOG(VB_RECORD, LOG_INFO, LOC +
QString("FindH264Keyframes: timescale: %1, tick: %2, framerate: %3")
.arg( m_h264_parser.GetTimeScale() )
.arg( m_h264_parser.GetUnitsInTick() )
.arg( frameRate.toDouble() * 1000 ) );
m_frameRate = frameRate;
FrameRateChange(frameRate.toDouble() * 1000, _frames_written_count);
}
return _seen_sps;
}
/** \fn DTVRecorder::HandleH264Keyframe(void)
* \brief This save the current frame to the position maps
* and handles ringbuffer switching.
*/
void DTVRecorder::HandleH264Keyframe(void)
{
// Perform ringbuffer switch if needed.
CheckForRingBufferSwitch();
uint64_t startpos;
uint64_t frameNum = _frames_written_count;
if (_first_keyframe < 0)
{