summaryrefslogtreecommitdiffstats
path: root/Documentation/DocBook/media/dvb/video.xml
blob: 25fb823226b42231f7333212c8256fd8d44a888b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
<title>DVB Video Device</title>
<para>The DVB video device controls the MPEG2 video decoder of the DVB hardware. It
can be accessed through <emphasis role="tt">/dev/dvb/adapter0/video0</emphasis>. Data types and and
ioctl definitions can be accessed by including <emphasis role="tt">linux/dvb/video.h</emphasis> in your
application.
</para>
<para>Note that the DVB video device only controls decoding of the MPEG video stream, not
its presentation on the TV or computer screen. On PCs this is typically handled by an
associated video4linux device, e.g. <emphasis role="tt">/dev/video</emphasis>, which allows scaling and defining output
windows.
</para>
<para>Some DVB cards don&#8217;t have their own MPEG decoder, which results in the omission of
the audio and video device as well as the video4linux device.
</para>
<para>The ioctls that deal with SPUs (sub picture units) and navigation packets are only
supported on some MPEG decoders made for DVD playback.
</para>
<section id="video_types">
<title>Video Data Types</title>

<section id="video-format-t">
<title>video_format_t</title>
<para>The <emphasis role="tt">video_format_t</emphasis> data type defined by
</para>
<programlisting>
typedef enum {
	VIDEO_FORMAT_4_3,     /&#x22C6; Select 4:3 format &#x22C6;/
	VIDEO_FORMAT_16_9,    /&#x22C6; Select 16:9 format. &#x22C6;/
	VIDEO_FORMAT_221_1    /&#x22C6; 2.21:1 &#x22C6;/
} video_format_t;
</programlisting>
<para>is used in the VIDEO_SET_FORMAT function (??) to tell the driver which aspect ratio
the output hardware (e.g. TV) has. It is also used in the data structures video_status
(??) returned by VIDEO_GET_STATUS (??) and video_event (??) returned by
VIDEO_GET_EVENT (??) which report about the display format of the current video
stream.
</para>
</section>

<section id="video-displayformat-t">
<title>video_displayformat_t</title>
<para>In case the display format of the video stream and of the display hardware differ the
application has to specify how to handle the cropping of the picture. This can be done using
the VIDEO_SET_DISPLAY_FORMAT call (??) which accepts
</para>
<programlisting>
typedef enum {
	VIDEO_PAN_SCAN,       /&#x22C6; use pan and scan format &#x22C6;/
	VIDEO_LETTER_BOX,     /&#x22C6; use letterbox format &#x22C6;/
	VIDEO_CENTER_CUT_OUT  /&#x22C6; use center cut out format &#x22C6;/
} video_displayformat_t;
</programlisting>
<para>as argument.
</para>
</section>

<section id="video-stream-source-t">
<title>video stream source</title>
<para>The video stream source is set through the VIDEO_SELECT_SOURCE call and can take
the following values, depending on whether we are replaying from an internal (demuxer) or
external (user write) source.
</para>
<programlisting>
typedef enum {
	VIDEO_SOURCE_DEMUX, /&#x22C6; Select the demux as the main source &#x22C6;/
	VIDEO_SOURCE_MEMORY /&#x22C6; If this source is selected, the stream
			       comes from the user through the write
			       system call &#x22C6;/
} video_stream_source_t;
</programlisting>
<para>VIDEO_SOURCE_DEMUX selects the demultiplexer (fed either by the frontend or the
DVR device) as the source of the video stream. If VIDEO_SOURCE_MEMORY
is selected the stream comes from the application through the <emphasis role="tt">write()</emphasis> system
call.
</para>
</section>

<section id="video-play-state-t">
<title>video play state</title>
<para>The following values can be returned by the VIDEO_GET_STATUS call representing the
state of video playback.
</para>
<programlisting>
typedef enum {
	VIDEO_STOPPED, /&#x22C6; Video is stopped &#x22C6;/
	VIDEO_PLAYING, /&#x22C6; Video is currently playing &#x22C6;/
	VIDEO_FREEZED  /&#x22C6; Video is freezed &#x22C6;/
} video_play_state_t;
</programlisting>
</section>

<section id="video-command">
<para>The structure must be zeroed before use by the application
This ensures it can be extended safely in the future.</para>
<title>struct video-command</title>
<programlisting>
struct video_command {
	__u32 cmd;
	__u32 flags;
	union {
		struct {
			__u64 pts;
		} stop;

		struct {
			/&#x22C6; 0 or 1000 specifies normal speed,
			   1 specifies forward single stepping,
			   -1 specifies backward single stepping,
			   &gt;>1: playback at speed/1000 of the normal speed,
			   &lt;-1: reverse playback at (-speed/1000) of the normal speed. &#x22C6;/
			__s32 speed;
			__u32 format;
		} play;

		struct {
			__u32 data[16];
		} raw;
	};
};
</programlisting>
</section>

<section id="video-size-t">
<title>struct video_size-t</title>
<programlisting>
typedef struct {
	int w;
	int h;
	video_format_t aspect_ratio;
} video_size_t;
</programlisting>
</section>


<section id="video-event">
<title>struct video_event</title>
<para>The following is the structure of a video event as it is returned by the VIDEO_GET_EVENT
call.
</para>
<programlisting>
struct video_event {
	__s32 type;
#define VIDEO_EVENT_SIZE_CHANGED	1
#define VIDEO_EVENT_FRAME_RATE_CHANGED	2
#define VIDEO_EVENT_DECODER_STOPPED 	3
#define VIDEO_EVENT_VSYNC 		4
	__kernel_time_t timestamp;
	union {
		video_size_t size;
		unsigned int frame_rate;	/&#x22C6; in frames per 1000sec &#x22C6;/
		unsigned char vsync_field;	/&#x22C6; unknown/odd/even/progressive &#x22C6;/
	} u;
};
</programlisting>
</section>

<section id="video-status">
<title>struct video_status</title>
<para>The VIDEO_GET_STATUS call returns the following structure informing about various
states of the playback operation.
</para>
<programlisting>
struct video_status {
	int                   video_blank;   /&#x22C6; blank video on freeze? &#x22C6;/
	video_play_state_t    play_state;    /&#x22C6; current state of playback &#x22C6;/
	video_stream_source_t stream_source; /&#x22C6; current source (demux/memory) &#x22C6;/
	video_format_t        video_format;  /&#x22C6; current aspect ratio of stream &#x22C6;/
	video_displayformat_t display_format;/&#x22C6; selected cropping mode &#x22C6;/
};
</programlisting>
<para>If video_blank is set video will be blanked out if the channel is changed or if playback is
stopped. Otherwise, the last picture will be displayed. play_state indicates if the video is
currently frozen, stopped, or being played back. The stream_source corresponds to the seleted
source for the video stream. It can come either from the demultiplexer or from memory.
The video_format indicates the aspect ratio (one of 4:3 or 16:9) of the currently
played video stream. Finally, display_format corresponds to the selected cropping
mode in case the source video format is not the same as the format of the output
device.
</para>
</section>

<section id="video-still-picture">
<title>struct video_still_picture</title>
<para>An I-frame displayed via the VIDEO_STILLPICTURE call is passed on within the
following structure.
</para>
<programlisting>
/&#x22C6; pointer to and size of a single iframe in memory &#x22C6;/
struct video_still_picture {
	char &#x22C6;iFrame;        /&#x22C6; pointer to a single iframe in memory &#x22C6;/
	int32_t size;
};
</programlisting>
</section>

<section id="video_caps">
<title>video capabilities</title>
<para>A call to VIDEO_GET_CAPABILITIES returns an unsigned integer with the following
bits set according to the hardwares capabilities.
</para>
<programlisting>
 /&#x22C6; bit definitions for capabilities: &#x22C6;/
 /&#x22C6; can the hardware decode MPEG1 and/or MPEG2? &#x22C6;/
 #define VIDEO_CAP_MPEG1   1
 #define VIDEO_CAP_MPEG2   2
 /&#x22C6; can you send a system and/or program stream to video device?
    (you still have to open the video and the audio device but only
     send the stream to the video device) &#x22C6;/
 #define VIDEO_CAP_SYS     4
 #define VIDEO_CAP_PROG    8
 /&#x22C6; can the driver also handle SPU, NAVI and CSS encoded data?
    (CSS API is not present yet) &#x22C6;/
 #define VIDEO_CAP_SPU    16
 #define VIDEO_CAP_NAVI   32
 #define VIDEO_CAP_CSS    64
</programlisting>
</section>

<section id="video-system">
<title>video system</title>
<para>A call to VIDEO_SET_SYSTEM sets the desired video system for TV output. The
following system types can be set:
</para>
<programlisting>
typedef enum {
	 VIDEO_SYSTEM_PAL,
	 VIDEO_SYSTEM_NTSC,
	 VIDEO_SYSTEM_PALN,
	 VIDEO_SYSTEM_PALNc,
	 VIDEO_SYSTEM_PALM,
	 VIDEO_SYSTEM_NTSC60,
	 VIDEO_SYSTEM_PAL60,
	 VIDEO_SYSTEM_PALM60
} video_system_t;
</programlisting>
</section>

<section id="video-highlight">
<title>struct video_highlight</title>
<para>Calling the ioctl VIDEO_SET_HIGHLIGHTS posts the SPU highlight information. The
call expects the following format for that information:
</para>
<programlisting>
 typedef
 struct video_highlight {
	 boolean active;      /&#x22C6;    1=show highlight, 0=hide highlight &#x22C6;/
	 uint8_t contrast1;   /&#x22C6;    7- 4  Pattern pixel contrast &#x22C6;/
			      /&#x22C6;    3- 0  Background pixel contrast &#x22C6;/
	 uint8_t contrast2;   /&#x22C6;    7- 4  Emphasis pixel-2 contrast &#x22C6;/
			      /&#x22C6;    3- 0  Emphasis pixel-1 contrast &#x22C6;/
	 uint8_t color1;      /&#x22C6;    7- 4  Pattern pixel color &#x22C6;/
			      /&#x22C6;    3- 0  Background pixel color &#x22C6;/
	 uint8_t color2;      /&#x22C6;    7- 4  Emphasis pixel-2 color &#x22C6;/
			      /&#x22C6;    3- 0  Emphasis pixel-1 color &#x22C6;/
	 uint32_t ypos;       /&#x22C6;   23-22  auto action mode &#x22C6;/
			      /&#x22C6;   21-12  start y &#x22C6;/
			      /&#x22C6;    9- 0  end y &#x22C6;/
	 uint32_t xpos;       /&#x22C6;   23-22  button color number &#x22C6;/
			      /&#x22C6;   21-12  start x &#x22C6;/
			      /&#x22C6;    9- 0  end x &#x22C6;/
 } video_highlight_t;
</programlisting>

</section>
<section id="video-spu">
<title>video SPU</title>
<para>Calling VIDEO_SET_SPU deactivates or activates SPU decoding, according to the
following format:
</para>
<programlisting>
 typedef
 struct video_spu {
	 boolean active;
	 int stream_id;
 } video_spu_t;
</programlisting>

</section>
<section id="video-spu-palette">
<title>video SPU palette</title>
<para>The following structure is used to set the SPU palette by calling VIDEO_SPU_PALETTE:
</para>
<programlisting>
 typedef
 struct video_spu_palette{
	 int length;
	 uint8_t &#x22C6;palette;
 } video_spu_palette_t;
</programlisting>

</section>
<section id="video-navi-pack">
<title>video NAVI pack</title>
<para>In order to get the navigational data the following structure has to be passed to the ioctl
VIDEO_GET_NAVI:
</para>
<programlisting>
 typedef
 struct video_navi_pack{
	 int length;         /&#x22C6; 0 ... 1024 &#x22C6;/
	 uint8_t data[1024];
 } video_navi_pack_t;
</programlisting>
</section>


<section id="video-attributes-t">
<title>video attributes</title>
<para>The following attributes can be set by a call to VIDEO_SET_ATTRIBUTES:
</para>
<programlisting>
 typedef uint16_t video_attributes_t;
 /&#x22C6;   bits: descr. &#x22C6;/
 /&#x22C6;   15-14 Video compression mode (0=MPEG-1, 1=MPEG-2) &#x22C6;/
 /&#x22C6;   13-12 TV system (0=525/60, 1=625/50) &#x22C6;/
 /&#x22C6;   11-10 Aspect ratio (0=4:3, 3=16:9) &#x22C6;/
 /&#x22C6;    9- 8 permitted display mode on 4:3 monitor (0=both, 1=only pan-sca &#x22C6;/
 /&#x22C6;    7    line 21-1 data present in GOP (1=yes, 0=no) &#x22C6;/
 /&#x22C6;    6    line 21-2 data present in GOP (1=yes, 0=no) &#x22C6;/
 /&#x22C6;    5- 3 source resolution (0=720x480/576, 1=704x480/576, 2=352x480/57 &#x22C6;/
 /&#x22C6;    2    source letterboxed (1=yes, 0=no) &#x22C6;/
 /&#x22C6;    0    film/camera mode (0=camera, 1=film (625/50 only)) &#x22C6;/
</programlisting>
</section></section>


<section id="video_function_calls">
<title>Video Function Calls</title>


<section id="video_fopen">
<title>open()</title>
<para>DESCRIPTION
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>This system call opens a named video device (e.g. /dev/dvb/adapter0/video0)
 for subsequent use.</para>
<para>When an open() call has succeeded, the device will be ready for use.
 The significance of blocking or non-blocking mode is described in the
 documentation for functions where there is a difference. It does not affect the
 semantics of the open() call itself. A device opened in blocking mode can later
 be put into non-blocking mode (and vice versa) using the F_SETFL command
 of the fcntl system call. This is a standard system call, documented in the Linux
 manual page for fcntl. Only one user can open the Video Device in O_RDWR
 mode. All other attempts to open the device in this mode will fail, and an
 error-code will be returned. If the Video Device is opened in O_RDONLY
 mode, the only ioctl call that can be used is VIDEO_GET_STATUS. All other
 call will return an error code.</para>
</entry>
 </row></tbody></tgroup></informaltable>

<para>SYNOPSIS
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>int open(const char &#x22C6;deviceName, int flags);</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>PARAMETERS
</para>
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>const char
 *deviceName</para>
</entry><entry
 align="char">
<para>Name of specific video device.</para>
</entry>
 </row><row><entry
 align="char">
<para>int flags</para>
</entry><entry
 align="char">
<para>A bit-wise OR of the following flags:</para>
</entry>
 </row><row><entry
 align="char">
</entry><entry
 align="char">
<para>O_RDONLY read-only access</para>
</entry>
 </row><row><entry
 align="char">
</entry><entry
 align="char">
<para>O_RDWR read/write access</para>
</entry>
 </row><row><entry
 align="char">
</entry><entry
 align="char">
<para>O_NONBLOCK open in non-blocking mode</para>
</entry>
 </row><row><entry
 align="char">
</entry><entry
 align="char">
<para>(blocking mode is the default)</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>RETURN VALUE</para>
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>ENODEV</para>
</entry><entry
 align="char">
<para>Device driver not loaded/available.</para>
</entry>
 </row><row><entry
 align="char">
<para>EINTERNAL</para>
</entry><entry
 align="char">
<para>Internal error.</para>
</entry>
 </row><row><entry
 align="char">
<para>EBUSY</para>
</entry><entry
 align="char">
<para>Device or resource busy.</para>
</entry>
 </row><row><entry
 align="char">
<para>EINVAL</para>
</entry><entry
 align="char">
<para>Invalid argument.</para>
</entry>
 </row></tbody></tgroup></informaltable>

</section>
<section id="video_fclose">
<title>close()</title>
<para>DESCRIPTION
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>This system call closes a previously opened video device.</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>SYNOPSIS
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>int close(int fd);</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>PARAMETERS
</para>
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>int fd</para>
</entry><entry
 align="char">
<para>File descriptor returned by a previous call to open().</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>RETURN VALUE</para>
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>EBADF</para>
</entry><entry
 align="char">
<para>fd is not a valid open file descriptor.</para>
</entry>
 </row></tbody></tgroup></informaltable>

</section>
<section id="video_fwrite">
<title>write()</title>
<para>DESCRIPTION
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>This system call can only be used if VIDEO_SOURCE_MEMORY is selected
 in the ioctl call VIDEO_SELECT_SOURCE. The data provided shall be in
 PES format, unless the capability allows other formats. If O_NONBLOCK is
 not specified the function will block until buffer space is available. The amount
 of data to be transferred is implied by count.</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>SYNOPSIS
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>size_t write(int fd, const void &#x22C6;buf, size_t count);</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>PARAMETERS
</para>
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>int fd</para>
</entry><entry
 align="char">
<para>File descriptor returned by a previous call to open().</para>
</entry>
 </row><row><entry
 align="char">
<para>void *buf</para>
</entry><entry
 align="char">
<para>Pointer to the buffer containing the PES data.</para>
</entry>
 </row><row><entry
 align="char">
<para>size_t count</para>
</entry><entry
 align="char">
<para>Size of buf.</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>RETURN VALUE</para>
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>EPERM</para>
</entry><entry
 align="char">
<para>Mode VIDEO_SOURCE_MEMORY not selected.</para>
</entry>
 </row><row><entry
 align="char">
<para>ENOMEM</para>
</entry><entry
 align="char">
<para>Attempted to write more data than the internal buffer can
 hold.</para>
</entry>
 </row><row><entry
 align="char">
<para>EBADF</para>
</entry><entry
 align="char">
<para>fd is not a valid open file descriptor.</para>
</entry>
 </row></tbody></tgroup></informaltable>

</section><section id="VIDEO_STOP"
role="subsection"><title>VIDEO_STOP</title>
<para>DESCRIPTION
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>This ioctl call asks the Video Device to stop playing the current stream.
 Depending on the input parameter, the screen can be blanked out or displaying
 the last decoded frame.</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>SYNOPSIS
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>int ioctl(fd, int request = VIDEO_STOP, boolean
 mode);</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>PARAMETERS
</para>
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>int fd</para>
</entry><entry
 align="char">
<para>File descriptor returned by a previous call to open().</para>
</entry>
 </row><row><entry
 align="char">
<para>int request</para>
</entry><entry
 align="char">
<para>Equals VIDEO_STOP for this command.</para>
</entry>
 </row><row><entry
 align="char">
<para>Boolean mode</para>
</entry><entry
 align="char">
<para>Indicates how the screen shall be handled.</para>
</entry>
 </row><row><entry
 align="char">
</entry><entry
 align="char">
<para>TRUE: Blank screen when stop.</para>
</entry>
 </row><row><entry
 align="char">
</entry><entry
 align="char">
<para>FALSE: Show last decoded frame.</para>
</entry>
 </row></tbody></tgroup></informaltable>
&return-value-dvb;

</section><section id="VIDEO_PLAY"
role="subsection"><title>VIDEO_PLAY</title>
<para>DESCRIPTION
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>This ioctl call asks the Video Device to start playing a video stream from the
 selected source.</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>SYNOPSIS
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>int ioctl(fd, int request = VIDEO_PLAY);</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>PARAMETERS
</para>
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>int fd</para>
</entry><entry
 align="char">
<para>File descriptor returned by a previous call to open().</para>
</entry>
 </row><row><entry
 align="char">
<para>int request</para>
</entry><entry
 align="char">
<para>Equals VIDEO_PLAY for this command.</para>
</entry>
 </row></tbody></tgroup></informaltable>
&return-value-dvb;

</section><section id="VIDEO_FREEZE"
role="subsection"><title>VIDEO_FREEZE</title>
<para>DESCRIPTION
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>This ioctl call suspends the live video stream being played. Decoding
 and playing are frozen. It is then possible to restart the decoding
 and playing process of the video stream using the VIDEO_CONTINUE
 command. If VIDEO_SOURCE_MEMORY is selected in the ioctl call
 VIDEO_SELECT_SOURCE, the DVB subsystem will not decode any more
 data until the ioctl call VIDEO_CONTINUE or VIDEO_PLAY is performed.</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>SYNOPSIS
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>int ioctl(fd, int request = VIDEO_FREEZE);</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>PARAMETERS
</para>
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>int fd</para>
</entry><entry
 align="char">
<para>File descriptor returned by a previous call to open().</para>
</entry>
 </row><row><entry
 align="char">
<para>int request</para>
</entry><entry
 align="char">
<para>Equals VIDEO_FREEZE for this command.</para>
</entry>
 </row></tbody></tgroup></informaltable>
&return-value-dvb;

</section><section id="VIDEO_CONTINUE"
role="subsection"><title>VIDEO_CONTINUE</title>
<para>DESCRIPTION
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>This ioctl call restarts decoding and playing processes of the video stream
 which was played before a call to VIDEO_FREEZE was made.</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>SYNOPSIS
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>int ioctl(fd, int request = VIDEO_CONTINUE);</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>PARAMETERS
</para>
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>int fd</para>
</entry><entry
 align="char">
<para>File descriptor returned by a previous call to open().</para>
</entry>
 </row><row><entry
 align="char">
<para>int request</para>
</entry><entry
 align="char">
<para>Equals VIDEO_CONTINUE for this command.</para>
</entry>
 </row></tbody></tgroup></informaltable>
&return-value-dvb;

</section><section id="VIDEO_SELECT_SOURCE"
role="subsection"><title>VIDEO_SELECT_SOURCE</title>
<para>DESCRIPTION
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>This ioctl call informs the video device which source shall be used for the input
 data. The possible sources are demux or memory. If memory is selected, the
 data is fed to the video device through the write command.</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>SYNOPSIS
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>int ioctl(fd, int request = VIDEO_SELECT_SOURCE,
 video_stream_source_t source);</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>PARAMETERS
</para>
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>int fd</para>
</entry><entry
 align="char">
<para>File descriptor returned by a previous call to open().</para>
</entry>
 </row><row><entry
 align="char">
<para>int request</para>
</entry><entry
 align="char">
<para>Equals VIDEO_SELECT_SOURCE for this command.</para>
</entry>
 </row><row><entry
 align="char">
<para>video_stream_source_t
 source</para>
</entry><entry
 align="char">
<para>Indicates which source shall be used for the Video stream.</para>
</entry>
 </row></tbody></tgroup></informaltable>
&return-value-dvb;

</section><section id="VIDEO_SET_BLANK"
role="subsection"><title>VIDEO_SET_BLANK</title>
<para>DESCRIPTION
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>This ioctl call asks the Video Device to blank out the picture.</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>SYNOPSIS
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>int ioctl(fd, int request = VIDEO_SET_BLANK, boolean
 mode);</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>PARAMETERS
</para>
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>int fd</para>
</entry><entry
 align="char">
<para>File descriptor returned by a previous call to open().</para>
</entry>
 </row><row><entry
 align="char">
<para>int request</para>
</entry><entry
 align="char">
<para>Equals VIDEO_SET_BLANK for this command.</para>
</entry>
 </row><row><entry
 align="char">
<para>boolean mode</para>
</entry><entry
 align="char">
<para>TRUE: Blank screen when stop.</para>
</entry>
 </row><row><entry
 align="char">
</entry><entry
 align="char">
<para>FALSE: Show last decoded frame.</para>
</entry>
 </row></tbody></tgroup></informaltable>
&return-value-dvb;

</section><section id="VIDEO_GET_STATUS"
role="subsection"><title>VIDEO_GET_STATUS</title>
<para>DESCRIPTION
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>This ioctl call asks the Video Device to return the current status of the device.</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>SYNOPSIS
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para> int ioctl(fd, int request = VIDEO_GET_STATUS, struct
 video_status &#x22C6;status);</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>PARAMETERS
</para>
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>int fd</para>
</entry><entry
 align="char">
<para>File descriptor returned by a previous call to open().</para>
</entry>
 </row><row><entry
 align="char">
<para>int request</para>
</entry><entry
 align="char">
<para>Equals VIDEO_GET_STATUS for this command.</para>
</entry>
 </row><row><entry
 align="char">
<para>struct video_status
 *status</para>
</entry><entry
 align="char">
<para>Returns the current status of the Video Device.</para>
</entry>
 </row></tbody></tgroup></informaltable>
&return-value-dvb;

</section><section id="VIDEO_GET_EVENT"
role="subsection"><title>VIDEO_GET_EVENT</title>
<para>DESCRIPTION
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>This ioctl call returns an event of type video_event if available. If an event is
 not available, the behavior depends on whether the device is in blocking or
 non-blocking mode. In the latter case, the call fails immediately with errno
 set to EWOULDBLOCK. In the former case, the call blocks until an event
 becomes available. The standard Linux poll() and/or select() system calls can
 be used with the device file descriptor to watch for new events. For select(),
 the file descriptor should be included in the exceptfds argument, and for
 poll(), POLLPRI should be specified as the wake-up condition. Read-only
 permissions are sufficient for this ioctl call.</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>SYNOPSIS
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para> int ioctl(fd, int request = VIDEO_GET_EVENT, struct
 video_event &#x22C6;ev);</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>PARAMETERS
</para>
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>int fd</para>
</entry><entry
 align="char">
<para>File descriptor returned by a previous call to open().</para>
</entry>
 </row><row><entry
 align="char">
<para>int request</para>
</entry><entry
 align="char">
<para>Equals VIDEO_GET_EVENT for this command.</para>
</entry>
 </row><row><entry
 align="char">
<para>struct video_event
 *ev</para>
</entry><entry
 align="char">
<para>Points to the location where the event, if any, is to be
 stored.</para>
</entry>
 </row></tbody></tgroup></informaltable>
&return-value-dvb;
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>EWOULDBLOCK</para>
</entry><entry
 align="char">
<para>There is no event pending, and the device is in
 non-blocking mode.</para>
</entry>
 </row><row><entry
 align="char">
<para>EOVERFLOW</para>
</entry><entry
 align="char">
<para>Overflow in event queue - one or more events were lost.</para>
</entry>
 </row></tbody></tgroup></informaltable>

</section><section id="VIDEO_SET_DISPLAY_FORMAT"
role="subsection"><title>VIDEO_SET_DISPLAY_FORMAT</title>
<para>DESCRIPTION
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>This ioctl call asks the Video Device to select the video format to be applied
 by the MPEG chip on the video.</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>SYNOPSIS
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para> int ioctl(fd, int request =
 VIDEO_SET_DISPLAY_FORMAT, video_display_format_t
 format);</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>PARAMETERS
</para>
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>int fd</para>
</entry><entry
 align="char">
<para>File descriptor returned by a previous call to open().</para>
</entry>
 </row><row><entry
 align="char">
<para>int request</para>
</entry><entry
 align="char">
<para>Equals VIDEO_SET_DISPLAY_FORMAT for this
 command.</para>
</entry>
 </row><row><entry
 align="char">
<para>video_display_format_t
 format</para>
</entry><entry
 align="char">
<para>Selects the video format to be used.</para>
</entry>
 </row></tbody></tgroup></informaltable>
&return-value-dvb;

</section><section id="VIDEO_STILLPICTURE"
role="subsection"><title>VIDEO_STILLPICTURE</title>
<para>DESCRIPTION
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>This ioctl call asks the Video Device to display a still picture (I-frame). The
 input data shall contain an I-frame. If the pointer is NULL, then the current
 displayed still picture is blanked.</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>SYNOPSIS
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>int ioctl(fd, int request = VIDEO_STILLPICTURE,
 struct video_still_picture &#x22C6;sp);</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>PARAMETERS
</para>
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>int fd</para>
</entry><entry
 align="char">
<para>File descriptor returned by a previous call to open().</para>
</entry>
 </row><row><entry
 align="char">
<para>int request</para>
</entry><entry
 align="char">
<para>Equals VIDEO_STILLPICTURE for this command.</para>
</entry>
 </row><row><entry
 align="char">
<para>struct
 video_still_picture
 *sp</para>
</entry><entry
 align="char">
<para>Pointer to a location where an I-frame and size is stored.</para>
</entry>
 </row></tbody></tgroup></informaltable>
&return-value-dvb;

</section><section id="VIDEO_FAST_FORWARD"
role="subsection"><title>VIDEO_FAST_FORWARD</title>
<para>DESCRIPTION
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>This ioctl call asks the Video Device to skip decoding of N number of I-frames.
 This call can only be used if VIDEO_SOURCE_MEMORY is selected.</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>SYNOPSIS
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>int ioctl(fd, int request = VIDEO_FAST_FORWARD, int
 nFrames);</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>PARAMETERS
</para>
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>int fd</para>
</entry><entry
 align="char">
<para>File descriptor returned by a previous call to open().</para>
</entry>
 </row><row><entry
 align="char">
<para>int request</para>
</entry><entry
 align="char">
<para>Equals VIDEO_FAST_FORWARD for this command.</para>
</entry>
 </row><row><entry
 align="char">
<para>int nFrames</para>
</entry><entry
 align="char">
<para>The number of frames to skip.</para>
</entry>
 </row></tbody></tgroup></informaltable>
&return-value-dvb;
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>EPERM</para>
</entry><entry
 align="char">
<para>Mode VIDEO_SOURCE_MEMORY not selected.</para>
</entry>
 </row></tbody></tgroup></informaltable>

</section><section id="VIDEO_SLOWMOTION"
role="subsection"><title>VIDEO_SLOWMOTION</title>
<para>DESCRIPTION
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>This ioctl call asks the video device to repeat decoding frames N number of
 times. This call can only be used if VIDEO_SOURCE_MEMORY is selected.</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>SYNOPSIS
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>int ioctl(fd, int request = VIDEO_SLOWMOTION, int
 nFrames);</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>PARAMETERS
</para>
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>int fd</para>
</entry><entry
 align="char">
<para>File descriptor returned by a previous call to open().</para>
</entry>
 </row><row><entry
 align="char">
<para>int request</para>
</entry><entry
 align="char">
<para>Equals VIDEO_SLOWMOTION for this command.</para>
</entry>
 </row><row><entry
 align="char">
<para>int nFrames</para>
</entry><entry
 align="char">
<para>The number of times to repeat each frame.</para>
</entry>
 </row></tbody></tgroup></informaltable>
&return-value-dvb;
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>EPERM</para>
</entry><entry
 align="char">
<para>Mode VIDEO_SOURCE_MEMORY not selected.</para>
</entry>
 </row></tbody></tgroup></informaltable>

</section><section id="VIDEO_GET_CAPABILITIES"
role="subsection"><title>VIDEO_GET_CAPABILITIES</title>
<para>DESCRIPTION
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>This ioctl call asks the video device about its decoding capabilities. On success
 it returns and integer which has bits set according to the defines in section ??.</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>SYNOPSIS
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>int ioctl(fd, int request = VIDEO_GET_CAPABILITIES,
 unsigned int &#x22C6;cap);</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>PARAMETERS
</para>
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>int fd</para>
</entry><entry
 align="char">
<para>File descriptor returned by a previous call to open().</para>
</entry>
 </row><row><entry
 align="char">
<para>int request</para>
</entry><entry
 align="char">
<para>Equals VIDEO_GET_CAPABILITIES for this
 command.</para>
</entry>
 </row><row><entry
 align="char">
<para>unsigned int *cap</para>
</entry><entry
 align="char">
<para>Pointer to a location where to store the capability
 information.</para>
</entry>
 </row></tbody></tgroup></informaltable>
&return-value-dvb;

</section><section id="VIDEO_SET_ID"
role="subsection"><title>VIDEO_SET_ID</title>
<para>DESCRIPTION
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>This ioctl selects which sub-stream is to be decoded if a program or system
 stream is sent to the video device.</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>SYNOPSIS
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>int ioctl(int fd, int request = VIDEO_SET_ID, int
 id);</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>PARAMETERS
</para>
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>int fd</para>
</entry><entry
 align="char">
<para>File descriptor returned by a previous call to open().</para>
</entry>
 </row><row><entry
 align="char">
<para>int request</para>
</entry><entry
 align="char">
<para>Equals VIDEO_SET_ID for this command.</para>
</entry>
 </row><row><entry
 align="char">
<para>int id</para>
</entry><entry
 align="char">
<para>video sub-stream id</para>
</entry>
 </row></tbody></tgroup></informaltable>
&return-value-dvb;
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>EINVAL</para>
</entry><entry
 align="char">
<para>Invalid sub-stream id.</para>
</entry>
 </row></tbody></tgroup></informaltable>

</section><section id="VIDEO_CLEAR_BUFFER"
role="subsection"><title>VIDEO_CLEAR_BUFFER</title>
<para>DESCRIPTION
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>This ioctl call clears all video buffers in the driver and in the decoder hardware.</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>SYNOPSIS
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>int ioctl(fd, int request = VIDEO_CLEAR_BUFFER);</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>PARAMETERS
</para>
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>int fd</para>
</entry><entry
 align="char">
<para>File descriptor returned by a previous call to open().</para>
</entry>
 </row><row><entry
 align="char">
<para>int request</para>
</entry><entry
 align="char">
<para>Equals VIDEO_CLEAR_BUFFER for this command.</para>
</entry>
 </row></tbody></tgroup></informaltable>
&return-value-dvb;

</section><section id="VIDEO_SET_STREAMTYPE"
role="subsection"><title>VIDEO_SET_STREAMTYPE</title>
<para>DESCRIPTION
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>This ioctl tells the driver which kind of stream to expect being written to it. If
 this call is not used the default of video PES is used. Some drivers might not
 support this call and always expect PES.</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>SYNOPSIS
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>int ioctl(fd, int request = VIDEO_SET_STREAMTYPE,
 int type);</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>PARAMETERS
</para>
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>int fd</para>
</entry><entry
 align="char">
<para>File descriptor returned by a previous call to open().</para>
</entry>
 </row><row><entry
 align="char">
<para>int request</para>
</entry><entry
 align="char">
<para>Equals VIDEO_SET_STREAMTYPE for this command.</para>
</entry>
 </row><row><entry
 align="char">
<para>int type</para>
</entry><entry
 align="char">
<para>stream type</para>
</entry>
 </row></tbody></tgroup></informaltable>
&return-value-dvb;

</section><section id="VIDEO_SET_FORMAT"
role="subsection"><title>VIDEO_SET_FORMAT</title>
<para>DESCRIPTION
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>This ioctl sets the screen format (aspect ratio) of the connected output device
 (TV) so that the output of the decoder can be adjusted accordingly.</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>SYNOPSIS
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para> int ioctl(fd, int request = VIDEO_SET_FORMAT,
 video_format_t format);</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>PARAMETERS
</para>
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>int fd</para>
</entry><entry
 align="char">
<para>File descriptor returned by a previous call to open().</para>
</entry>
 </row><row><entry
 align="char">
<para>int request</para>
</entry><entry
 align="char">
<para>Equals VIDEO_SET_FORMAT for this command.</para>
</entry>
 </row><row><entry
 align="char">
<para>video_format_t
 format</para>
</entry><entry
 align="char">
<para>video format of TV as defined in section ??.</para>
</entry>
 </row></tbody></tgroup></informaltable>
&return-value-dvb;
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>EINVAL</para>
</entry><entry
 align="char">
<para>format is not a valid video format.</para>
</entry>
 </row></tbody></tgroup></informaltable>

</section><section id="VIDEO_SET_SYSTEM"
role="subsection"><title>VIDEO_SET_SYSTEM</title>
<para>DESCRIPTION
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>This ioctl sets the television output format. The format (see section ??) may
 vary from the color format of the displayed MPEG stream. If the hardware is
 not able to display the requested format the call will return an error.</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>SYNOPSIS
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para> int ioctl(fd, int request = VIDEO_SET_SYSTEM ,
 video_system_t system);</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>PARAMETERS
</para>
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>int fd</para>
</entry><entry
 align="char">
<para>File descriptor returned by a previous call to open().</para>
</entry>
 </row><row><entry
 align="char">
<para>int request</para>
</entry><entry
 align="char">
<para>Equals VIDEO_SET_FORMAT for this command.</para>
</entry>
 </row><row><entry
 align="char">
<para>video_system_t
 system</para>
</entry><entry
 align="char">
<para>video system of TV output.</para>
</entry>
 </row></tbody></tgroup></informaltable>
&return-value-dvb;
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>EINVAL</para>
</entry><entry
 align="char">
<para>system is not a valid or supported video system.</para>
</entry>
 </row></tbody></tgroup></informaltable>

</section><section id="VIDEO_SET_HIGHLIGHT"
role="subsection"><title>VIDEO_SET_HIGHLIGHT</title>
<para>DESCRIPTION
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>This ioctl sets the SPU highlight information for the menu access of a DVD.</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>SYNOPSIS
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para> int ioctl(fd, int request = VIDEO_SET_HIGHLIGHT
 ,video_highlight_t &#x22C6;vhilite)</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>PARAMETERS
</para>
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>int fd</para>
</entry><entry
 align="char">
<para>File descriptor returned by a previous call to open().</para>
</entry>
 </row><row><entry
 align="char">
<para>int request</para>
</entry><entry
 align="char">
<para>Equals VIDEO_SET_HIGHLIGHT for this command.</para>
</entry>
 </row><row><entry
 align="char">
<para>video_highlight_t
 *vhilite</para>
</entry><entry
 align="char">
<para>SPU Highlight information according to section ??.</para>
</entry>
 </row></tbody></tgroup></informaltable>
&return-value-dvb;

</section><section id="VIDEO_SET_SPU"
role="subsection"><title>VIDEO_SET_SPU</title>
<para>DESCRIPTION
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>This ioctl activates or deactivates SPU decoding in a DVD input stream. It can
 only be used, if the driver is able to handle a DVD stream.</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>SYNOPSIS
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para> int ioctl(fd, int request = VIDEO_SET_SPU ,
 video_spu_t &#x22C6;spu)</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>PARAMETERS
</para>
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>int fd</para>
</entry><entry
 align="char">
<para>File descriptor returned by a previous call to open().</para>
</entry>
 </row><row><entry
 align="char">
<para>int request</para>
</entry><entry
 align="char">
<para>Equals VIDEO_SET_SPU for this command.</para>
</entry>
 </row><row><entry
 align="char">
<para>video_spu_t *spu</para>
</entry><entry
 align="char">
<para>SPU decoding (de)activation and subid setting according
 to section ??.</para>
</entry>
 </row></tbody></tgroup></informaltable>
&return-value-dvb;
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>EINVAL</para>
</entry><entry
 align="char">
<para>input is not a valid spu setting or driver cannot handle
 SPU.</para>
</entry>
 </row></tbody></tgroup></informaltable>

</section><section id="VIDEO_SET_SPU_PALETTE"
role="subsection"><title>VIDEO_SET_SPU_PALETTE</title>
<para>DESCRIPTION
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>This ioctl sets the SPU color palette.</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>SYNOPSIS
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para> int ioctl(fd, int request = VIDEO_SET_SPU_PALETTE
 ,video_spu_palette_t &#x22C6;palette )</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>PARAMETERS
</para>
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>int fd</para>
</entry><entry
 align="char">
<para>File descriptor returned by a previous call to open().</para>
</entry>
 </row><row><entry
 align="char">
<para>int request</para>
</entry><entry
 align="char">
<para>Equals VIDEO_SET_SPU_PALETTE for this command.</para>
</entry>
 </row><row><entry
 align="char">
<para>video_spu_palette_t
 *palette</para>
</entry><entry
 align="char">
<para>SPU palette according to section ??.</para>
</entry>
 </row></tbody></tgroup></informaltable>
&return-value-dvb;
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>EINVAL</para>
</entry><entry
 align="char">
<para>input is not a valid palette or driver doesn&#8217;t handle SPU.</para>
</entry>
 </row></tbody></tgroup></informaltable>

</section><section id="VIDEO_GET_NAVI"
role="subsection"><title>VIDEO_GET_NAVI</title>
<para>DESCRIPTION
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>This ioctl returns navigational information from the DVD stream. This is
 especially needed if an encoded stream has to be decoded by the hardware.</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>SYNOPSIS
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para> int ioctl(fd, int request = VIDEO_GET_NAVI ,
 video_navi_pack_t &#x22C6;navipack)</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>PARAMETERS
</para>
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>int fd</para>
</entry><entry
 align="char">
<para>File descriptor returned by a previous call to open().</para>
</entry>
 </row><row><entry
 align="char">
<para>int request</para>
</entry><entry
 align="char">
<para>Equals VIDEO_GET_NAVI for this command.</para>
</entry>
 </row><row><entry
 align="char">
<para>video_navi_pack_t
 *navipack</para>
</entry><entry
 align="char">
<para>PCI or DSI pack (private stream 2) according to section
 ??.</para>
</entry>
 </row></tbody></tgroup></informaltable>
&return-value-dvb;
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>EFAULT</para>
</entry><entry
 align="char">
<para>driver is not able to return navigational information</para>
</entry>
 </row></tbody></tgroup></informaltable>

</section><section id="VIDEO_SET_ATTRIBUTES"
role="subsection"><title>VIDEO_SET_ATTRIBUTES</title>
<para>DESCRIPTION
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>This ioctl is intended for DVD playback and allows you to set certain
 information about the stream. Some hardware may not need this information,
 but the call also tells the hardware to prepare for DVD playback.</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>SYNOPSIS
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para> int ioctl(fd, int request = VIDEO_SET_ATTRIBUTE
 ,video_attributes_t vattr)</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>PARAMETERS
</para>
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>int fd</para>
</entry><entry
 align="char">
<para>File descriptor returned by a previous call to open().</para>
</entry>
 </row><row><entry
 align="char">
<para>int request</para>
</entry><entry
 align="char">
<para>Equals VIDEO_SET_ATTRIBUTE for this command.</para>
</entry>
 </row><row><entry
 align="char">
<para>video_attributes_t
 vattr</para>
</entry><entry
 align="char">
<para>video attributes according to section ??.</para>
</entry>
 </row></tbody></tgroup></informaltable>
&return-value-dvb;
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>EINVAL</para>
</entry><entry
 align="char">
<para>input is not a valid attribute setting.</para>
</entry>
 </row></tbody></tgroup></informaltable>
 </section></section>
OpenPOWER on IntegriCloud