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
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
|
(*
* copyright (c) 2001 Fabrice Bellard
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* This is a part of Pascal porting of ffmpeg.
* - Originally by Victor Zinetz for Delphi and Free Pascal on Windows.
* - For Mac OS X, some modifications were made by The Creative CAT, denoted as CAT
* in the source codes.
* - Changes and updates by the UltraStar Deluxe Team
*
* Conversion of version 0.10 libavformat/avformat.h
* Min. version: 53.31.100
* Max. version: 53.32.100
*)
unit avformat;
{$IFDEF FPC}
{$MODE DELPHI }
{$PACKENUM 4} (* use 4-byte enums *)
{$PACKRECORDS C} (* C/C++-compatible record packing *)
{$ELSE}
{$MINENUMSIZE 4} (* use 4-byte enums *)
{$ENDIF}
{$I switches.inc} (* for the HasInline define *)
{$IFDEF DARWIN}
{$linklib libavformat}
{$ENDIF}
interface
uses
ctypes,
avcodec,
avio,
avutil,
rational,
SysUtils,
UConfig;
const
(*
* IMPORTANT: This headers are valid for all minor revisions of ffmpeg
* version 0.10x
* This file has been created with the previous ffmpeg headers as a basis
* by removing all unneeded conditionals.
*)
(* Max. supported version by this header *)
LIBAVFORMAT_MAX_VERSION_MAJOR = 53;
LIBAVFORMAT_MAX_VERSION_MINOR = 32;
LIBAVFORMAT_MAX_VERSION_RELEASE = 100;
LIBAVFORMAT_MAX_VERSION = (LIBAVFORMAT_MAX_VERSION_MAJOR * VERSION_MAJOR) +
(LIBAVFORMAT_MAX_VERSION_MINOR * VERSION_MINOR) +
(LIBAVFORMAT_MAX_VERSION_RELEASE * VERSION_RELEASE);
(* Min. supported version by this header *)
LIBAVFORMAT_MIN_VERSION_MAJOR = 53;
LIBAVFORMAT_MIN_VERSION_MINOR = 31;
LIBAVFORMAT_MIN_VERSION_RELEASE = 100;
LIBAVFORMAT_MIN_VERSION = (LIBAVFORMAT_MIN_VERSION_MAJOR * VERSION_MAJOR) +
(LIBAVFORMAT_MIN_VERSION_MINOR * VERSION_MINOR) +
(LIBAVFORMAT_MIN_VERSION_RELEASE * VERSION_RELEASE);
(* Check if linked versions are supported *)
{$IF (LIBAVFORMAT_VERSION < LIBAVFORMAT_MIN_VERSION)}
{$MESSAGE Error 'Linked version of libavformat is too old!'}
{$IFEND}
(* Check if linked versions are supported *)
{$IF (LIBAVFORMAT_VERSION > LIBAVFORMAT_MAX_VERSION)}
{$MESSAGE Error 'Linked version of libavformat is not yet supported!'}
{$IFEND}
{
const
LIBAVFORMAT_BUILD = LIBAVFORMAT_VERSION_INT;
LIBAVFORMAT_IDENT = 'Lavf' AV_STRINGIFY(LIBAVFORMAT_VERSION);
}
(**
* Those FF_API_* defines are not part of public API.
* They may change, break or disappear at any time.
*)
{$IFDEF FPC}
{$macro on}
{$ENDIF}
{$ifndef FF_API_OLD_METADATA2}
{$define FF_API_OLD_METADATA2 := (LIBAVFORMAT_VERSION_MAJOR < 54)}
{$endif}
{$ifndef FF_API_OLD_AVIO}
{$define FF_API_OLD_AVIO := (LIBAVFORMAT_VERSION_MAJOR < 54)}
{$endif}
{$ifndef FF_API_DUMP_FORMAT}
{$define FF_API_DUMP_FORMAT := (LIBAVFORMAT_VERSION_MAJOR < 54)}
{$endif}
{$ifndef FF_API_PARSE_DATE}
{$define FF_API_PARSE_DATE := (LIBAVFORMAT_VERSION_MAJOR < 54)}
{$endif}
{$ifndef FF_API_FIND_INFO_TAG}
{$define FF_API_FIND_INFO_TAG := (LIBAVFORMAT_VERSION_MAJOR < 54)}
{$endif}
{$ifndef FF_API_PKT_DUMP}
{$define FF_API_PKT_DUMP := (LIBAVFORMAT_VERSION_MAJOR < 54)}
{$endif}
{$ifndef FF_API_GUESS_IMG2_CODEC}
{$define FF_API_GUESS_IMG2_CODEC := (LIBAVFORMAT_VERSION_MAJOR < 54)}
{$endif}
{$ifndef FF_API_SDP_CREATE}
{$define FF_API_SDP_CREATE := (LIBAVFORMAT_VERSION_MAJOR < 54)}
{$endif}
{$ifndef FF_API_ALLOC_OUTPUT_CONTEXT}
{$define FF_API_ALLOC_OUTPUT_CONTEXT := (LIBAVFORMAT_VERSION_MAJOR < 54)}
{$endif}
{$ifndef FF_API_FORMAT_PARAMETERS}
{$define FF_API_FORMAT_PARAMETERS := (LIBAVFORMAT_VERSION_MAJOR < 54)}
{$endif}
{$ifndef FF_API_FLAG_RTP_HINT}
{$define FF_API_FLAG_RTP_HINT := (LIBAVFORMAT_VERSION_MAJOR < 54)}
{$endif}
{$ifndef FF_API_AVSTREAM_QUALITY}
{$define FF_API_AVSTREAM_QUALITY := (LIBAVFORMAT_VERSION_MAJOR < 54)}
{$endif}
{$ifndef FF_API_LOOP_INPUT}
{$define FF_API_LOOP_INPUT := (LIBAVFORMAT_VERSION_MAJOR < 54)}
{$endif}
{$ifndef FF_API_LOOP_OUTPUT}
{$define FF_API_LOOP_OUTPUT := (LIBAVFORMAT_VERSION_MAJOR < 54)}
{$endif}
{$ifndef FF_API_TIMESTAMP}
{$define FF_API_TIMESTAMP := (LIBAVFORMAT_VERSION_MAJOR < 54)}
{$endif}
{$ifndef FF_API_FILESIZE}
{$define FF_API_FILESIZE := (LIBAVFORMAT_VERSION_MAJOR < 54)}
{$endif}
{$ifndef FF_API_MUXRATE}
{$define FF_API_MUXRATE := (LIBAVFORMAT_VERSION_MAJOR < 54)}
{$endif}
{$ifndef FF_API_RTSP_URL_OPTIONS}
{$define FF_API_RTSP_URL_OPTIONS := (LIBAVFORMAT_VERSION_MAJOR < 54)}
{$endif}
{$ifndef FF_API_NEW_STREAM}
{$define FF_API_NEW_STREAM := (LIBAVFORMAT_VERSION_MAJOR < 54)}
{$endif}
{$ifndef FF_API_PRELOAD}
{$define FF_API_PRELOAD := (LIBAVFORMAT_VERSION_MAJOR < 54)}
{$endif}
{$ifndef FF_API_STREAM_COPY}
{$define FF_API_STREAM_COPY := (LIBAVFORMAT_VERSION_MAJOR < 54)}
{$endif}
{$ifndef FF_API_SEEK_PUBLIC}
{$define FF_API_SEEK_PUBLIC := (LIBAVFORMAT_VERSION_MAJOR < 54)}
{$endif}
{$ifndef FF_API_REORDER_PRIVATE}
{$define FF_API_REORDER_PRIVATE := (LIBAVFORMAT_VERSION_MAJOR < 54)}
{$endif}
{$ifndef FF_API_OLD_INTERRUPT_CB}
{$define FF_API_OLD_INTERRUPT_CB := (LIBAVFORMAT_VERSION_MAJOR < 54)}
{$endif}
{$ifndef FF_API_SET_PTS_INFO}
{$define FF_API_SET_PTS_INFO := (LIBAVFORMAT_VERSION_MAJOR < 54)}
{$endif}
{$ifndef FF_API_CLOSE_INPUT_FILE}
{$define FF_API_CLOSE_INPUT_FILE := (LIBAVFORMAT_VERSION_MAJOR < 55)}
{$endif}
(**
* @defgroup libavf I/O and Muxing/Demuxing Library
* @{
*
* Libavformat (lavf) is a library for dealing with various media container
* formats. Its main two purposes are demuxing - i.e. splitting a media file
* into component streams, and the reverse process of muxing - writing supplied
* data in a specified container format. It also has an @ref lavf_io
* "I/O module" which supports a number of protocols for accessing the data (e.g.
* file, tcp, http and others). Before using lavf, you need to call
* av_register_all() to register all compiled muxers, demuxers and protocols.
* Unless you are absolutely sure you won't use libavformat's network
* capabilities, you should also call avformat_network_init().
*
* A supported input format is described by an AVInputFormat struct, conversely
* an output format is described by AVOutputFormat. You can iterate over all
* registered input/output formats using the av_iformat_next() /
* av_oformat_next() functions. The protocols layer is not part of the public
* API, so you can only get the names of supported protocols with the
* avio_enum_protocols() function.
*
* Main lavf structure used for both muxing and demuxing is AVFormatContext,
* which exports all information about the file being read or written. As with
* most Libav structures, its size is not part of public ABI, so it cannot be
* allocated on stack or directly with av_malloc(). To create an
* AVFormatContext, use avformat_alloc_context() (some functions, like
* avformat_open_input() might do that for you).
*
* Most importantly an AVFormatContext contains:
* @li the @ref AVFormatContext.iformat "input" or @ref AVFormatContext.oformat
* "output" format. It is either autodetected or set by user for input;
* always set by user for output.
* @li an @ref AVFormatContext.streams "array" of AVStreams, which describe all
* elementary streams stored in the file. AVStreams are typically referred to
* using their index in this array.
* @li an @ref AVFormatContext.pb "I/O context". It is either opened by lavf or
* set by user for input, always set by user for output (unless you are dealing
* with an AVFMT_NOFILE format).
*
* @defgroup lavf_decoding Demuxing
* @{
* Demuxers read a media file and split it into chunks of data (@em packets). A
* @ref AVPacket "packet" contains one or more frames which belong a single
* elementary stream. In lavf API this process is represented by the
* avformat_open_input() function for opening a file, av_read_frame() for
* reading a single packet and finally avformat_close_input(), which does the
* cleanup.
*
* @section lavf_decoding_open Opening a media file
* The minimum information required to open a file is its URL or filename, which
* is passed to avformat_open_input(), as in the following code:
* @code
* const char *url = "in.mp3";
* AVFormatContext *s = NULL;
* int ret = avformat_open_input(&s, url, NULL, NULL);
* if (ret < 0)
* abort();
* @endcode
* The above code attempts to allocate an AVFormatContext, open the
* specified file (autodetecting the format) and read the header, exporting the
* information stored there into s. Some formats do not have a header or do not
* store enough information there, so it is recommended that you call the
* avformat_find_stream_info() function which tries to read and decode a few
* frames to find missing information.
*
* In some cases you might want to preallocate an AVFormatContext yourself with
* avformat_alloc_context() and do some tweaking on it before passing it to
* avformat_open_input(). One such case is when you want to use custom functions
* for reading input data instead of lavf internal I/O layer.
* To do that, create your own AVIOContext with avio_alloc_context(), passing
* your reading callbacks to it. Then set the @em pb field of your
* AVFormatContext to newly created AVIOContext.
*
* After you have finished reading the file, you must close it with
* avformat_close_input(). It will free everything associated with the file.
*
* @section lavf_decoding_read Reading from an opened file
*
* @section lavf_decoding_seek Seeking
* @}
*
* @defgroup lavf_encoding Muxing
* @{
* @}
*
* @defgroup lavf_io I/O Read/Write
* @{
* @}
*
* @defgroup lavf_codec Demuxers
* @{
* @defgroup lavf_codec_native Native Demuxers
* @{
* @}
* @defgroup lavf_codec_wrappers External library wrappers
* @{
* @}
* @}
* @defgroup lavf_protos I/O Protocols
* @{
* @}
* @defgroup lavf_internal Internal
* @{
* @}
* @}
*
*)
type
PAVFile = Pointer;
(*
* @defgroup metadata_api Public Metadata API
* @{
* @ingroup libavf
* The metadata API allows libavformat to export metadata tags to a client
* application when demuxing. Conversely it allows a client application to
* set metadata when muxing.
*
* Metadata is exported or set as pairs of key/value strings in the 'metadata'
* fields of the AVFormatContext, AVStream, AVChapter and AVProgram structs
* using the @ref lavu_dict "AVDictionary" API. Like all strings in FFmpeg,
* metadata is assumed to be UTF-8 encoded Unicode. Note that metadata
* exported by demuxers isn't checked to be valid UTF-8 in most cases.
*
* Important concepts to keep in mind:
* - Keys are unique; there can never be 2 tags with the same key. This is
* also meant semantically, i.e., a demuxer should not knowingly produce
* several keys that are literally different but semantically identical.
* E.g., key=Author5, key=Author6. In this example, all authors must be
* placed in the same tag.
* - Metadata is flat, not hierarchical; there are no subtags. If you
* want to store, e.g., the email address of the child of producer Alice
* and actor Bob, that could have key=alice_and_bobs_childs_email_address.
* - Several modifiers can be applied to the tag name. This is done by
* appending a dash character ('-') and the modifier name in the order
* they appear in the list below -- e.g. foo-eng-sort, not foo-sort-eng.
* - language -- a tag whose value is localized for a particular language
* is appended with the ISO 639-2/B 3-letter language code.
* For example: Author-ger=Michael, Author-eng=Mike
* The original/default language is in the unqualified "Author" tag.
* A demuxer should set a default if it sets any translated tag.
* - sorting -- a modified version of a tag that should be used for
* sorting will have '-sort' appended. E.g. artist="The Beatles",
* artist-sort="Beatles, The".
*
* - Demuxers attempt to export metadata in a generic format, however tags
* with no generic equivalents are left as they are stored in the container.
* Follows a list of generic tag names:
*
@verbatim
album -- name of the set this work belongs to
album_artist -- main creator of the set/album, if different from artist.
e.g. "Various Artists" for compilation albums.
artist -- main creator of the work
comment -- any additional description of the file.
composer -- who composed the work, if different from artist.
copyright -- name of copyright holder.
creation_time-- date when the file was created, preferably in ISO 8601.
date -- date when the work was created, preferably in ISO 8601.
disc -- number of a subset, e.g. disc in a multi-disc collection.
encoder -- name/settings of the software/hardware that produced the file.
encoded_by -- person/group who created the file.
filename -- original name of the file.
genre -- <self-evident>.
language -- main language in which the work is performed, preferably
in ISO 639-2 format. Multiple languages can be specified by
separating them with commas.
performer -- artist who performed the work, if different from artist.
E.g for "Also sprach Zarathustra", artist would be "Richard
Strauss" and performer "London Philharmonic Orchestra".
publisher -- name of the label/publisher.
service_name -- name of the service in broadcasting (channel name).
service_provider -- name of the service provider in broadcasting.
title -- name of the work.
track -- number of this work in the set, can be in form current/total.
variant_bitrate -- the total bitrate of the bitrate variant that the current stream is part of
@endverbatim
*
* Look in the examples section for an application example how to use the Metadata API.
*
* @}
*)
{$IF FF_API_OLD_METADATA2}
(**
* @defgroup old_metadata Old metadata API
* The following functions are deprecated, use
* their equivalents from libavutil/dict.h instead.
* @
*)
const
{
AV_METADATA_MATCH_CASE = 1;
AV_METADATA_IGNORE_SUFFIX = 2;
AV_METADATA_DONT_STRDUP_KEY = 4;
AV_METADATA_DONT_STRDUP_VAL = 8;
AV_METADATA_DONT_OVERWRITE = 16;
}
AV_METADATA_MATCH_CASE = AV_DICT_MATCH_CASE;
AV_METADATA_IGNORE_SUFFIX = AV_DICT_IGNORE_SUFFIX;
AV_METADATA_DONT_STRDUP_KEY = AV_DICT_DONT_STRDUP_KEY;
AV_METADATA_DONT_STRDUP_VAL = AV_DICT_DONT_STRDUP_VAL;
AV_METADATA_DONT_OVERWRITE = AV_DICT_DONT_OVERWRITE;
type
PAVMetadataTag = ^TAVMetadataTag;
TAVMetadataTag = record
key: PAnsiChar;
value: PAnsiChar;
end;
PAVMetadata = Pointer;
PAVDictionary = PAVMetadata;
PAVDictionaryEntry = PAVMetadata;
(**
* Get a metadata element with matching key.
*
* @param prev Set to the previous matching element to find the next.
* If set to NULL the first matching element is returned.
* @param flags Allows case as well as suffix-insensitive comparisons.
* @return Found tag or NULL, changing key or value leads to undefined behavior.
*)
function av_metadata_get(m: PAVDictionary; key: {const} PAnsiChar;
prev: {const} PAVDictionaryEntry; flags: cint): PAVDictionaryEntry;
cdecl; external av__format;
(**
* Set the given tag in *pm, overwriting an existing tag.
*
* @param pm pointer to a pointer to a metadata struct. If *pm is NULL
* a metadata struct is allocated and put in *pm.
* @param key tag key to add to *pm (will be av_strduped depending on flags)
* @param value tag value to add to *pm (will be av_strduped depending on flags).
* Passing a NULL value will cause an existing tag to be deleted.
* @return >= 0 on success otherwise an error code <0
*)
function av_metadata_set2(var pm: PAVDictionary; key: {const} PAnsiChar; value: {const} PAnsiChar; flags: cint): cint;
cdecl; external av__format; deprecated;
(**
* Copy metadata from one AVDictionary struct into another.
* @param dst pointer to a pointer to a AVDictionary struct. If *dst is NULL,
* this function will allocate a struct for you and put it in *dst
* @param src pointer to source AVDictionary struct
* @param flags flags to use when setting metadata in *dst
* @note metadata is read using the AV_DICT_IGNORE_SUFFIX flag
*)
procedure av_metadata_copy(var dst: PAVDictionary; src: PAVDictionary; flags: cint);
cdecl; external av__format; deprecated;
(**
* Free all the memory allocated for an AVDictionary struct.
*)
procedure av_metadata_free(var m: PAVDictionary);
cdecl; external av__format; deprecated;
(**
* @}
*)
{$IFEND}
(* packet functions *)
const
PKT_FLAG_KEY = $0001;
procedure av_destruct_packet_nofree(var pkt: TAVPacket);
cdecl; external av__format;
(**
* Default packet destructor.
*)
procedure av_destruct_packet(var pkt: TAVPacket);
cdecl; external av__format;
(**
* Initialize optional fields of a packet with default values.
*
* @param pkt packet
*)
procedure av_init_packet(var pkt: TAVPacket);
cdecl; external av__format;
(**
* Allocate the payload of a packet and initialize its fields with
* default values.
*
* @param pkt packet
* @param size wanted payload size
* @return 0 if OK, AVERROR_xxx otherwise
*)
function av_new_packet(var pkt: TAVPacket; size: cint): cint;
cdecl; external av__format;
(**
* Allocate and read the payload of a packet and initialize its fields with
* default values.
*
* @param pkt packet
* @param size desired payload size
* @return >0 (read size) if OK, AVERROR_xxx otherwise
*)
function av_get_packet(s: PByteIOContext; var pkt: TAVPacket; size: cint): cint;
cdecl; external av__format;
(*************************************************)
(* fractional numbers for exact pts handling *)
type
(**
* The exact value of the fractional number is: 'val + num / den'.
* num is assumed to be 0 <= num < den.
*)
PAVFrac = ^TAVFrac;
TAVFrac = record
val, num, den: cint64;
end;
(*************************************************)
(* input/output formats *)
type
(**
* This structure contains the data a format has to probe a file.
*)
TAVProbeData = record
filename: PAnsiChar;
buf: PByteArray; (**< Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero. *)
buf_size: cint; (**< Size of buf except extra allocated bytes *)
end;
const
AVPROBE_SCORE_MAX = 100; ///< Maximum score, half of that is used for file-extension-based detection
AVPROBE_PADDING_SIZE = 32; ///< extra allocated bytes at the end of the probe buffer
/// Demuxer will use avio_open, no opened file should be provided by the caller.
AVFMT_NOFILE = $0001;
AVFMT_NEEDNUMBER = $0002; (**< Needs '%d' in filename. *)
AVFMT_SHOW_IDS = $0008; (**< Show format stream IDs numbers. *)
AVFMT_RAWPICTURE = $0020; (**< Format wants AVPicture structure for
raw picture data. *)
AVFMT_GLOBALHEADER = $0040; (**< Format wants global header. *)
AVFMT_NOTIMESTAMPS = $0080; (**< Format does not need / have any timestamps. *)
AVFMT_GENERIC_INDEX = $0100; (**< Use generic index building code. *)
AVFMT_TS_DISCONT = $0200; (**< Format allows timestamp discontinuities. *)
AVFMT_VARIABLE_FPS = $0400; (**< Format allows variable fps. *)
AVFMT_NODIMENSIONS = $0800; (**< Format does not need width/height *)
AVFMT_NOSTREAMS = $1000; (**< Format does not require any streams *)
AVFMT_NOBINSEARCH = $2000; (**< Format does not allow to fallback to binary search via read_timestamp *)
AVFMT_NOGENSEARCH = $4000; (**< Format does not allow to fallback to generic search *)
AVFMT_NO_BYTE_SEEK = $8000; (**< Format does not allow seeking by bytes *)
AVFMT_TS_NONSTRICT = $8000000; (**< Format does not require strictly
increasing timestamps, but they must
still be monotonic *)
// used by AVIndexEntry
AVINDEX_KEYFRAME = $0001;
AVFMTCTX_NOHEADER = $0001; (**< signal that no header is present
(streams are added dynamically) *)
MAX_STREAMS = 20;
AVFMT_NOOUTPUTLOOP = -1;
AVFMT_INFINITEOUTPUTLOOP = 0;
AVFMT_FLAG_GENPTS = $0001; ///< Generate missing pts even if it requires parsing future frames.
AVFMT_FLAG_IGNIDX = $0002; ///< Ignore index.
AVFMT_FLAG_NONBLOCK = $0004; ///< Do not block when reading packets from input.
AVFMT_FLAG_IGNDTS = $0008; ///< Ignore DTS on frames that contain both DTS & PTS
AVFMT_FLAG_NOFILLIN = $0010; ///< Do not infer any values from other values, just return what is stored in the container
AVFMT_FLAG_NOPARSE = $0020; ///< Do not use AVParsers, you also must set AVFMT_FLAG_NOFILLIN as the fillin code works on frames and no parsing -> no frames. Also seeking to frames can not work if parsing to find frame boundaries has been disabled
AVFMT_FLAG_RTP_HINT = $0040; ///< Add RTP hinting to the output file
MAX_STD_TIMEBASES = (60*12+5);
// used by AVStream
MAX_REORDER_DELAY = 16;
// used by TAVProgram
AV_PROGRAM_RUNNING = 1;
AV_DISPOSITION_DEFAULT = $0001;
AV_DISPOSITION_DUB = $0002;
AV_DISPOSITION_ORIGINAL = $0004;
AV_DISPOSITION_COMMENT = $0008;
AV_DISPOSITION_LYRICS = $0010;
AV_DISPOSITION_KARAOKE = $0020;
(**
* Track should be used during playback by default.
* Useful for subtitle track that should be displayed
* even when user did not explicitly ask for subtitles.
*)
AV_DISPOSITION_FORCED = $0040;
// used by TAVFormatContext.debug
FF_FDEBUG_TS = 0001;
MAX_PROBE_PACKETS = 2500;
RAW_PACKET_BUFFER_SIZE = 2500000;
type
PPAVCodecTag = ^PAVCodecTag;
PAVCodecTag = Pointer;
PAVFormatParameters = ^TAVFormatParameters;
PAVOutputFormat = ^TAVOutputFormat;
PAVProbeData = ^TAVProbeData;
PAVInputFormat = ^TAVInputFormat;
PAVIndexEntry = ^TAVIndexEntry;
PPAVStream = ^PAVStream;
PAVStream = ^TAVStream;
PAVPacketList = ^TAVPacketList;
PPAVProgram = ^PAVProgram;
PAVProgram = ^TAVProgram;
PPAVFormatContext = ^PAVFormatContext;
PAVFormatContext = ^TAVFormatContext;
(**
* Convert all the metadata sets from ctx according to the source and
* destination conversion tables.
*
* @param d_conv destination tags format conversion table
* @param s_conv source tags format conversion table
*)
PAVMetadataConv = ^TAVMetadataConv;
TAVMetadataConv = record
ctx: PAVFormatContext;
d_conv: {const} PAVMetadataConv;
s_conv: {const} PAVMetadataConv;
end;
TAVFormatParameters = record
time_base: TAVRational;
sample_rate: cint;
channels: cint;
width: cint;
height: cint;
pix_fmt: TAVPixelFormat;
channel: cint; (**< Used to select DV channel. *)
standard: PAnsiChar; (**< TV standard, NTSC, PAL, SECAM *)
{ Delphi does not support bit fields -> use bf_flags instead
unsigned int mpeg2ts_raw:1; (**< Force raw MPEG-2 transport stream output, if possible. *)
unsigned int mpeg2ts_compute_pcr:1; (**< Compute exact PCR for each transport
stream packet (only meaningful if
mpeg2ts_raw is TRUE). *)
unsigned int initial_pause:1; (**< Do not begin to play the stream
immediately (RTSP only). *)
unsigned int prealloced_context:1;
}
bf_flags: byte; // 0:mpeg2ts_raw/1:mpeg2ts_compute_pcr/2:initial_pause/3:prealloced_context
end;
(**
* @addtogroup lavf_encoding
* @{
*)
TAVOutputFormat = record
name: PAnsiChar;
(**
* Descriptive name for the format, meant to be more human-readable
* than name. You should use the NULL_IF_CONFIG_SMALL() macro
* to define it.
*)
long_name: PAnsiChar;
mime_type: PAnsiChar;
extensions: PAnsiChar; (**< comma-separated filename extensions *)
(**
* size of private data so that it can be allocated in the wrapper
*)
priv_data_size: cint;
(* output support *)
audio_codec: TCodecID; (**< default audio codec *)
video_codec: TCodecID; (**< default video codec *)
write_header: function (c: PAVFormatContext): cint; cdecl;
(**
* Write a packet. If AVFMT_ALLOW_FLUSH is set in flags,
* pkt can be NULL in order to flush data buffered in the muxer.
* When flushing, return 0 if there still is more data to flush,
* or 1 if everything was flushed and there is no more buffered
* data.
*)
write_packet: function (c: PAVFormatContext; pkt: PAVPacket): cint; cdecl;
write_trailer: function (c: PAVFormatContext): cint; cdecl;
(**
* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_RAWPICTURE,
* AVFMT_GLOBALHEADER, AVFMT_NOTIMESTAMPS, AVFMT_VARIABLE_FPS,
* AVFMT_NODIMENSIONS, AVFMT_NOSTREAMS, AVFMT_ALLOW_FLUSH
*)
flags: cint;
dummy: pointer;
interleave_packet: function (s: PAVFormatContext; out_: PAVPacket;
in_: PAVPacket; flush: cint): cint; cdecl;
(**
* List of supported codec_id-codec_tag pairs, ordered by "better
* choice first". The arrays are all terminated by CODEC_ID_NONE.
*)
codec_tag: {const} PPAVCodecTag;
subtitle_codec: TCodecID; (**< default subtitle codec *)
{$IF FF_API_OLD_METADATA2}
{const} metadata_conv: PAVMetadataConv;
{$IFEND}
{const} priv_class: PAVClass; ///< AVClass for the private context
(**
* Test if the given codec can be stored in this container.
*
* @return 1 if the codec is supported, 0 if it is not.
* A negative number if unknown.
*)
query_codec: function (id: TCodecID; std_compliance: cint): cint; cdecl;
get_output_timestamp: procedure (s: PAVFormatContext; stream: cint;
dts: Pcint64; wall: Pcint64); cdecl;
(* private fields *)
next: PAVOutputFormat;
end;
(**
* @}
*)
(**
* @addtogroup lavf_decoding
* @{
*)
TAVInputFormat = record
(**
* A comma separated list of short names for the format. New names
* may be appended with a minor bump.
*)
name: PAnsiChar;
(**
* Descriptive name for the format, meant to be more human-readable
* than name. You should use the NULL_IF_CONFIG_SMALL() macro
* to define it.
*)
long_name: PAnsiChar;
(**
* Size of private data so that it can be allocated in the wrapper.
*)
priv_data_size: cint;
(**
* Tell if a given file has a chance of being parsed as this format.
* The buffer provided is guaranteed to be AVPROBE_PADDING_SIZE bytes
* big so you do not have to check for that unless you need more.
*)
read_probe: function (p: PAVProbeData): cint; cdecl;
(**
* Read the format header and initialize the AVFormatContext
* structure. Return 0 if OK. 'ap' if non-NULL contains
* additional parameters. Only used in raw format right
* now. 'av_new_stream' should be called to create new streams.
*)
read_header: function (c: PAVFormatContext; ap: PAVFormatParameters): cint; cdecl;
(**
* Read one packet and put it in 'pkt'. pts and flags are also
* set. 'av_new_stream' can be called only if the flag
* AVFMTCTX_NOHEADER is used.
* @return 0 on success, < 0 on error.
* When returning an error, pkt must not have been allocated
* or must be freed before returning
*)
read_packet: function (c: PAVFormatContext; var pkt: TAVPacket): cint; cdecl;
(**
* Close the stream. The AVFormatContext and AVStreams are not
* freed by this function
*)
read_close: function (c: PAVFormatContext): cint; cdecl;
(**
* Seek to a given timestamp relative to the frames in
* stream component stream_index.
* @param stream_index Must not be -1.
* @param flags Selects which direction should be preferred if no exact
* match is available.
* @return >= 0 on success (but not necessarily the new offset)
*)
read_seek: function (c: PAVFormatContext; stream_index: cint;
timestamp: cint64; flags: cint): cint; cdecl;
(**
* Get the next timestamp in stream[stream_index].time_base units.
* @return the timestamp or AV_NOPTS_VALUE if an error occurred
*)
read_timestamp: function (s: PAVFormatContext; stream_index: cint;
pos: pint64; pos_limit: cint64): cint64; cdecl;
(**
* Can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_SHOW_IDS,
* AVFMT_GENERIC_INDEX, AVFMT_TS_DISCONT, AVFMT_NOBINSEARCH,
* AVFMT_NOGENSEARCH, AVFMT_NO_BYTE_SEEK.
*)
flags: cint;
(**
* If extensions are defined, then no probe is done. You should
* usually not use extension format guessing because it is not
* reliable enough
*)
extensions: PAnsiChar;
(**
* General purpose read-only value that the format can use.
*)
value: cint;
(**
* Start/resume playing - only meaningful if using a network-based format
* (RTSP).
*)
read_play: function (c: PAVFormatContext): cint; cdecl;
(**
* Pause playing - only meaningful if using a network-based format
* (RTSP).
*)
read_pause: function (c: PAVFormatContext): cint; cdecl;
codec_tag: {const} PPAVCodecTag;
(**
* Seek to timestamp ts.
* Seeking will be done so that the point from which all active streams
* can be presented successfully will be closest to ts and within min/max_ts.
* Active streams are all streams that have AVStream.discard < AVDISCARD_ALL.
*)
read_seek2: function (s: PAVFormatContext;
stream_index: cint;
min_ts: cint64;
ts: cint64;
max_ts: cint64;
flags: cint): cint; cdecl;
{const} metadata_conv: PAVMetadataConv;
(* private fields *)
next: PAVInputFormat;
end;
(**
* @}
*)
TAVStreamParseType = (
AVSTREAM_PARSE_NONE,
AVSTREAM_PARSE_FULL, (**< full parsing and repack *)
AVSTREAM_PARSE_HEADERS, (**< Only parse headers, do not repack. *)
AVSTREAM_PARSE_TIMESTAMPS, (**< full parsing and interpolation of timestamps for frames not starting on a packet boundary *)
AVSTREAM_PARSE_FULL_ONCE (**< full parsing and repack of the first frame only, only implemented for H.264 currently *)
);
TAVIndexEntry = record
pos: cint64;
timestamp: cint64; (**<
* Timestamp in AVStream.time_base units, preferably the time from which on correctly decoded frames are available
* when seeking to this entry. That means preferable PTS on keyframe based formats.
* But demuxers can choose to store a different timestamp, if it is more convenient for the implementation or nothing better
* is known
*)
{ Delphi doesn't support bitfields -> use flags_size instead
int flags:2;
int size:30; //Yeah, trying to keep the size of this small to reduce memory requirements (it is 24 vs. 32 bytes due to possible 8-byte alignment).
}
flags_size: cint; // 0..1: flags, 2..31: size
min_distance: cint; (**< Minimum distance between this and the previous keyframe, used to avoid unneeded searching. *)
end;
PStreamInfo = ^TStreamInfo;
TStreamInfo = record
last_dts: cint64;
duration_gcd: cint64;
duration_count: cint;
duration_error: array[0..1] of array[0..1] of array[0..MAX_STD_TIMEBASES - 1] of cdouble;
codec_info_duration: cint64;
nb_decoded_frames: cint;
end;
(**
* Stream structure.
* New fields can be added to the end with minor version bumps.
* Removal, reordering and changes to existing fields require a major
* version bump.
* sizeof(AVStream) must not be used outside libav*.
*)
TAVStream = record
index: cint; (**< stream index in AVFormatContext *)
id: cint; (**< format-specific stream ID *)
codec: PAVCodecContext; (**< codec context *)
(**
* Real base framerate of the stream.
* This is the lowest framerate with which all timestamps can be
* represented accurately (it is the least common multiple of all
* framerates in the stream). Note, this value is just a guess!
* For example, if the time base is 1/90000 and all frames have either
* approximately 3600 or 1800 timer ticks, then r_frame_rate will be 50/1.
*)
r_frame_rate: TAVRational;
priv_data: pointer;
{$IF FF_API_REORDER_PRIVATE}
(* internal data used in av_find_stream_info() *)
first_dts: cint64;
{$IFEND}
(**
* encoding: pts generation when outputting stream
*)
pts: TAVFrac;
(**
* This is the fundamental unit of time (in seconds) in terms
* of which frame timestamps are represented. For fixed-fps content,
* time base should be 1/framerate and timestamp increments should be 1.
* decoding: set by libavformat
* encoding: set by libavformat in av_write_header
*)
time_base: TAVRational;
{$IF FF_API_REORDER_PRIVATE}
pts_wrap_bits: cint; (* number of bits in pts (used for wrapping control) *)
{$IFEND}
{$IF FF_API_STREAM_COPY}
(* ffmpeg.c private use *)
stream_copy: cint; (**< If set, just copy stream. *) {deprecated}
{$IFEND}
discard: TAVDiscard; ///< Selects which packets can be discarded at will and do not need to be demuxed.
{$IF FF_API_AVSTREAM_QUALITY}
//FIXME move stuff to a flags field?
(**
* Quality, as it has been removed from AVCodecContext and put in AVVideoFrame.
* MN:dunno if thats the right place, for it
*)
quality: cfloat; {deprecated}
{$IFEND}
(**
* Decoding: pts of the first frame of the stream in presentation order, in stream time base.
* Only set this if you are absolutely 100% sure that the value you set
* it to really is the pts of the first frame.
* This may be undefined (AV_NOPTS_VALUE).
* @note The ASF header does NOT contain a correct start_time the ASF
* demuxer must NOT set this.
*)
start_time: cint64;
(**
* Decoding: duration of the stream, in stream time base.
* If a source file does not specify a duration, but does specify
* a bitrate, this value will be estimated from bitrate and file size.
*)
duration: cint64;
{$IF FF_API_REORDER_PRIVATE}
(* av_read_frame() support *)
need_parsing: TAVStreamParseType;
parser: PAVCodecParserContext;
cur_dts: cint64;
last_IP_duration: cint;
last_IP_pts: cint64;
(* av_seek_frame() support *)
index_entries: PAVIndexEntry; (**< Only used if the format does not
support seeking natively. *)
nb_index_entries: cint;
index_entries_allocated_size: cuint;
{$IFEND}
nb_frames: cint64; ///< number of frames in this stream if known or 0
disposition: cint; (**< AV_DISPOSITION_* bitfield *)
{$IF FF_API_REORDER_PRIVATE}
probe_data: TAVProbeData;
pts_buffer: array [0..MAX_REORDER_DELAY] of cint64;
{$IFEND}
(**
* sample aspect ratio (0 if unknown)
* - encoding: Set by user.
* - decoding: Set by libavformat.
*)
sample_aspect_ratio: TAVRational;
metadata: PAVDictionary;
{$IF FF_API_REORDER_PRIVATE}
{* Intended mostly for av_read_frame() support. Not supposed to be used by *}
{* external applications; try to use something else if at all possible. *}
cur_ptr: {const} PCuint8;
cur_len: cint;
cur_pkt: TAVPacket;
// Timestamp generation support:
(**
* Timestamp corresponding to the last dts sync point.
*
* Initialized when AVCodecParserContext.dts_sync_point >= 0 and
* a DTS is received from the underlying container. Otherwise set to
* AV_NOPTS_VALUE by default.
*)
reference_dts: cint64;
(**
* Number of packets to buffer for codec probing
* NOT PART OF PUBLIC API
*)
probe_packets: cint;
(**
* last packet in packet_buffer for this stream when muxing.
* Used internally, NOT PART OF PUBLIC API, do not read or
* write from outside of libav*
*)
last_in_packet_buffer: PAVPacketList;
{$IFEND}
(**
* Average framerate
*)
avg_frame_rate: TAVRational;
(*****************************************************************
* All fields below this line are not part of the public API. They
* may not be used outside of libavformat and can be changed and
* removed at will.
* New public fields should be added right above.
*****************************************************************
*)
(**
* Number of frames that have been demuxed during av_find_stream_info()
*)
codec_info_nb_frames: cint;
(**
* Stream Identifier
* This is the MPEG-TS stream identifier +1
* 0 means unknown
*)
stream_identifier: cint;
interleaver_chunk_size: cint64;
interleaver_chunk_duration: cint64;
(**
* Stream information used internally by av_find_stream_info()
*)
info: PStreamInfo;
(**
* flag to indicate that probing is requested
* NOT PART OF PUBLIC API
*)
request_probe: cint;
{$IF NOT FF_API_REORDER_PRIVATE}
{const} cur_ptr: PByte;
cur_len: cint;
cur_pkt: TAVPacket;
// Timestamp generation support:
(**
* Timestamp corresponding to the last dts sync point.
*
* Initialized when AVCodecParserContext.dts_sync_point >= 0 and
* a DTS is received from the underlying container. Otherwise set to
* AV_NOPTS_VALUE by default.
*)
reference_dts: cint64;
first_dts: cint64;
cur_dts: cint64;
last_IP_duration: cint;
last_IP_pts: cint64;
(**
* Number of packets to buffer for codec probing
*)
probe_packets: cint;
(**
* last packet in packet_buffer for this stream when muxing.
*)
last_in_packet_buffer: PAVPacketList;
probe_data: TAVProbeData;
pts_buffer: array [0..MAX_REORDER_DELAY] of cint64;
(* av_read_frame() support *)
need_parsing: TAVStreamParseType;
parser: PAVCodecParserContext;
index_entries: PAVIndexEntry; (**< Only used if the format does not
support seeking natively. *)
nb_index_entries: cint;
index_entries_allocated_size: cuint;
pts_wrap_bits: cint; (**< number of bits in pts (used for wrapping control) *)
{$IFEND}
end;
(**
* New fields can be added to the end with minor version bumps.
* Removal, reordering and changes to existing fields require a major
* version bump.
* sizeof(AVProgram) must not be used outside libav*.
*)
TAVProgram = record
id: cint;
flags: cint;
discard: TAVDiscard; ///< selects which program to discard and which to feed to the caller
stream_index: Pcuint;
nb_stream_indexes: cuint;
metadata: PAVDictionary;
program_num: cint;
pmt_pid: cint;
pcr_pid: cint;
end; (*AVProgram*)
PAVChapter = ^TAVChapter;
TAVChapter = record
id: cint; ///< unique ID to identify the chapter
time_base: TAVRational; ///< time base in which the start/end timestamps are specified
start, end_: cint64; ///< chapter start/end time in time_base units
metadata: PAVDictionary;
end; (*AVChapter*)
TAVChapterArray = array[0..(MaxInt div SizeOf(TAVChapter))-1] of TAVChapter;
PAVChapterArray = ^TAVChapterArray;
(**
* Format I/O context.
* New fields can be added to the end with minor version bumps.
* Removal, reordering and changes to existing fields require a major
* version bump.
* sizeof(AVFormatContext) must not be used outside libav*, use
* avformat_alloc_context() to create an AVFormatContext.
*)
TAVFormatContext = record
(**
* A class for logging and AVOptions. Set by avformat_alloc_context().
* Exports (de)muxer private options if they exist.
*)
av_class: PAVClass; (**< Set by avformat_alloc_context. *)
(**
* Can only be iformat or oformat, not both at the same time.
*
* decoding: set by avformat_open_input().
* encoding: set by the user.
*)
iformat: PAVInputFormat;
oformat: PAVOutputFormat;
(**
* Format private data. This is an AVOptions-enabled struct
* if and only if iformat/oformat.priv_class is not NULL.
*)
priv_data: pointer;
(*
* I/O context.
*
* decoding: either set by the user before avformat_open_input() (then
* the user must close it manually) or set by avformat_open_input().
* encoding: set by the user.
*
* Do NOT set this field if AVFMT_NOFILE flag is set in
* iformat/oformat.flags. In such a case, the (de)muxer will handle
* I/O in some other way and this field will be NULL.
*)
pb: PByteIOContext;
(**
* A list of all streams in the file. New streams are created with
* avformat_new_stream().
*
* decoding: streams are created by libavformat in avformat_open_input().
* If AVFMTCTX_NOHEADER is set in ctx_flags, then new streams may also
* appear in av_read_frame().
* encoding: streams are created by the user before avformat_write_header().
*)
nb_streams: cuint;
streams: PPAVStream;
filename: array [0..1023] of AnsiChar; (* input or output filename *)
(* stream info *)
{$IF FF_API_TIMESTAMP}
(**
* @deprecated use 'creation_time' metadata tag instead
*)
timestamp: cint64; {deprecated}
{$IFEND}
ctx_flags: cint; (**< Format-specific flags, see AVFMTCTX_xx *)
{$IF FF_API_REORDER_PRIVATE}
(* private data for pts handling (do not modify directly). *)
(**
* This buffer is only needed when packets were already buffered but
* not decoded, for example to get the codec parameters in MPEG
* streams.
*)
packet_buffer: PAVPacketList;
{$IFEND}
(**
* Decoding: position of the first frame of the component, in
* AV_TIME_BASE fractional seconds. NEVER set this value directly:
* It is deduced from the AVStream values.
*)
start_time: cint64;
(**
* Decoding: duration of the stream, in AV_TIME_BASE fractional
* seconds. Only set this value if you know none of the individual stream
* durations and also dont set any of them. This is deduced from the
* AVStream values if not set.
*)
duration: cint64;
{$IF FF_API_FILESIZE}
(**
* decoding: total file size, 0 if unknown
*)
file_size: cint64;
{$IFEND}
(**
* Decoding: total stream bitrate in bit/s, 0 if not
* available. Never set it directly if the file_size and the
* duration are known as ffmpeg can compute it automatically.
*)
bit_rate: cint;
{$IF FF_API_REORDER_PRIVATE}
(* av_read_frame() support *)
cur_st: PAVStream;
(* av_seek_frame() support *)
data_offset: cint64; (**< offset of the first packet *)
{$IFEND}
{$IF FF_API_MUXRATE}
(**
* use mpeg muxer private options instead
*)
mux_rate: cint; {deprecated}
{$IFEND}
packet_size: cuint;
{$IF FF_API_PRELOAD}
preload: cint; {deprecated}
{$IFEND}
max_delay: cint;
{$IF FF_API_LOOP_OUTPUT}
(**
* number of times to loop output in formats that support it
*
* @deprecated use the 'loop' private option in the gif muxer.
*)
loop_output: cint;
{$IFEND}
flags: cint;
{$IF FF_API_LOOP_INPUT}
(**
* @deprecated, use the 'loop' img2 demuxer private option.
*)
loop_input: cint; {deprecated}
{$IFEND}
(**
* decoding: size of data to probe; encoding: unused.
*)
probesize: cuint;
(**
* decoding: maximum time (in AV_TIME_BASE units) during which the input should
* be analyzed in avformat_find_stream_info().
*)
max_analyze_duration: cint;
key: pbyte;
keylen : cint;
nb_programs: cuint;
programs: PPAVProgram;
(**
* Forced video codec_id.
* Demuxing: Set by user.
*)
video_codec_id: TCodecID;
(**
* Forced audio codec_id.
* Demuxing: Set by user.
*)
audio_codec_id: TCodecID;
(**
* Forced subtitle codec_id.
* Demuxing: Set by user.
*)
subtitle_codec_id: TCodecID;
(**
* Maximum amount of memory in bytes to use for the index of each stream.
* If the index exceeds this size, entries will be discarded as
* needed to maintain a smaller size. This can lead to slower or less
* accurate seeking (depends on demuxer).
* Demuxers for which a full in-memory index is mandatory will ignore
* this.
* muxing : unused
* demuxing: set by user
*)
max_index_size: cuint;
(**
* Maximum amount of memory in bytes to use for buffering frames
* obtained from realtime capture devices.
*)
max_picture_buffer: cuint;
nb_chapters: cuint;
chapters: PAVChapterArray;
(**
* Flags to enable debugging.
*)
debug: cint;
{$IF FF_API_REORDER_PRIVATE}
(**
* Raw packets from the demuxer, prior to parsing and decoding.
* This buffer is used for buffering packets until the codec can
* be identified, as parsing cannot be done without knowing the
* codec.
*)
raw_packet_buffer: PAVPacketList;
raw_packet_buffer_end: PAVPacketList;
packet_buffer_end: PAVPacketList;
{$IFEND}
metadata: PAVDictionary;
{$IF FF_API_REORDER_PRIVATE}
(**
* Remaining size available for raw_packet_buffer, in bytes.
* NOT PART OF PUBLIC API
*)
raw_packet_buffer_remaining_size: cint;
{$IFEND}
(**
* Start time of the stream in real world time, in microseconds
* since the unix epoch (00:00 1st January 1970). That is, pts=0
* in the stream was captured at this real world time.
* - encoding: Set by user.
* - decoding: Unused.
*)
start_time_realtime: cint64;
(**
* decoding: number of frames used to probe fps
*)
fps_probe_size: cint;
(**
* Error recognition; higher values will detect more errors but may
* misdetect some more or less valid parts as errors.
* - encoding: unused
* - decoding: Set by user.
*)
error_recognition: cint;
(**
* Custom interrupt callbacks for the I/O layer.
*
* decoding: set by the user before avformat_open_input().
* encoding: set by the user before avformat_write_header()
* (mainly useful for AVFMT_NOFILE formats). The callback
* should also be passed to avio_open2() if it's used to
* open the file.
*)
interrupt_callback: TAVIOInterruptCB;
(**
* Transport stream id.
* This will be moved into demuxer private options. Thus no API/ABI compatibility
*)
ts_id: cint;
(**
* Audio preload in microseconds.
* Note, not all formats support this and unpredictable things may happen if it is used when not supported.
* - encoding: Set by user via AVOptions (NO direct access)
* - decoding: unused
*)
audio_preload: cint;
(**
* Max chunk time in microseconds.
* Note, not all formats support this and unpredictable things may happen if it is used when not supported.
* - encoding: Set by user via AVOptions (NO direct access)
* - decoding: unused
*)
max_chunk_duration: cint;
(**
* Max chunk size in bytes
* Note, not all formats support this and unpredictable things may happen if it is used when not supported.
* - encoding: Set by user via AVOptions (NO direct access)
* - decoding: unused
*)
max_chunk_size: cint;
(*****************************************************************
* All fields below this line are not part of the public API. They
* may not be used outside of libavformat and can be changed and
* removed at will.
* New public fields should be added right above.
*****************************************************************
*)
{$IF NOT FF_API_REORDER_PRIVATE}
(**
* Raw packets from the demuxer, prior to parsing and decoding.
* This buffer is used for buffering packets until the codec can
* be identified, as parsing cannot be done without knowing the
* codec.
*)
raw_packet_buffer_: PAVPacketList;
raw_packet_buffer_end_: PAVPacketList;
(**
* Remaining size available for raw_packet_buffer, in bytes.
*)
raw_packet_buffer_remaining_size: cint;
(**
* This buffer is only needed when packets were already buffered but
* not decoded, for example to get the codec parameters in MPEG
* streams.
*)
packet_buffer: PAVPacketList;
packet_buffer_end_: PAVPacketList;
(* av_read_frame() support *)
cur_st: PAVStream;
(* av_seek_frame() support *)
data_offset: cint64; (**< offset of the first packet *)
{$IFEND}
end;
TAVPacketList = record
pkt: TAVPacket;
next: PAVPacketList;
end; (*AVPacketList*)
(**
* This function is provided for compatibility reason and currently does nothing.
*)
procedure av_metadata_conv(ctx: PAVFormatContext; {const} d_conv: PAVMetadataConv; {const} s_conv: PAVMetadataConv);
cdecl; external av__format; deprecated;
(**
* @defgroup lavf_core Core functions
* @ingroup libavf
*
* Functions for querying libavformat capabilities, allocating core structures,
* etc.
* @{
*)
(**
* Return the LIBAVFORMAT_VERSION_INT constant.
*)
function avformat_version(): cuint;
cdecl; external av__format;
(**
* Return the libavformat build-time configuration.
*)
function avformat_configuration(): {const} PansiChar;
cdecl; external av__format;
(**
* Return the libavformat license.
*)
function avformat_license(): {const} PansiChar;
cdecl; external av__format;
(**
* Initialize libavformat and register all the muxers, demuxers and
* protocols. If you do not call this function, then you can select
* exactly which formats you want to support.
*
* @see av_register_input_format()
* @see av_register_output_format()
* @see av_register_protocol()
*)
procedure av_register_all();
cdecl; external av__format;
procedure av_register_input_format(format: PAVInputFormat);
cdecl; external av__format;
procedure av_register_output_format(format: PAVOutputFormat);
cdecl; external av__format;
(**
* Do global initialization of network components. This is optional,
* but recommended, since it avoids the overhead of implicitly
* doing the setup for each session.
*
* Calling this function will become mandatory if using network
* protocols at some major version bump.
*)
function avformat_network_init(): cint;
cdecl; external av__format;
(**
* Undo the initialization done by avformat_network_init.
*)
function avformat_network_deinit(): cint;
cdecl; external av__format;
(**
* If f is NULL, returns the first registered input format,
* if f is non-NULL, returns the next registered input format after f
* or NULL if f is the last one.
*)
function av_iformat_next(f: PAVInputFormat): PAVInputFormat;
cdecl; external av__format;
(**
* If f is NULL, returns the first registered output format,
* if f is non-NULL, returns the next registered input format after f
* or NULL if f is the last one.
*)
function av_oformat_next(f: PAVOutputFormat): PAVOutputFormat;
cdecl; external av__format;
(**
* Allocate an AVFormatContext.
* Can be freed with av_free() but do not forget to free everything you
* explicitly allocated as well!
*)
function avformat_alloc_context(): PAVFormatContext;
cdecl; external av__format;
(**
* Free an AVFormatContext and all its streams.
* @param s context to free
*)
procedure avformat_free_context(s: PAVFormatContext);
cdecl; external av__format;
(**
* Get the AVClass for AVFormatContext. It can be used in combination with
* AV_OPT_SEARCH_FAKE_OBJ for examining options.
*
* @see av_opt_find().
*)
function avformat_get_class(): {const} PAVClass;
cdecl; external av__format;
(**
* Add a new stream to a media file.
*
* When demuxing, it is called by the demuxer in read_header(). If the
* flag AVFMTCTX_NOHEADER is set in s.ctx_flags, then it may also
* be called in read_packet().
*
* When muxing, should be called by the user before avformat_write_header().
*
* @param c If non-NULL, the AVCodecContext corresponding to the new stream
* will be initialized to use this codec. This is needed for e.g. codec-specific
* defaults to be set, so codec should be provided if it is known.
*
* @return newly created stream or NULL on error.
*)
function avformat_new_stream(s: PAVFormatContext; c: PAVCodec): PAVStream;
cdecl; external av__format;
function av_new_program(s: PAVFormatContext; id: cint): PAVProgram;
cdecl; external av__format;
(**
* @}
*)
{$IF FF_API_GUESS_IMG2_CODEC}
function av_guess_image2_codec(filename: {const} PAnsiChar): TCodecID;
cdecl; external av__format;
{$IFEND}
{$IF FF_API_PKT_DUMP}
procedure av_pkt_dump(f: PAVFile; pkt: PAVPacket; dump_payload: cint); {deprecated}
cdecl; external av__format;
procedure av_pkt_dump_log(avcl: Pointer; level: cint; pkt: PAVPacket; dump_payload: cint); {deprecated}
cdecl; external av__format;
{$IFEND}
{$IF FF_API_ALLOC_OUTPUT_CONTEXT}
(**
* @deprecated deprecated in favor of avformat_alloc_output_context2()
*)
function avformat_alloc_output_context({const} format: PAnsiChar;
oformat: PAVOutputFormat;
{const} filename: PAnsiChar): PAVFormatContext;
cdecl; external av__format;
{$IFEND}
(**
* Allocate an AVFormatContext for an output format.
* avformat_free_context() can be used to free the context and
* everything allocated by the framework within it.
*
* @param *ctx is set to the created format context, or to NULL in
* case of failure
* @param oformat format to use for allocating the context, if NULL
* format_name and filename are used instead
* @param format_name the name of output format to use for allocating the
* context, if NULL filename is used instead
* @param filename the name of the filename to use for allocating the
* context, may be NULL
* @return >= 0 in case of success, a negative AVERROR code in case of
* failure
*)
function avformat_alloc_output_context2(ctx: PPAVFormatContext; oformat: PAVOutputFormat;
{const} format_name: PAnsiChar; {const} filename: PAnsiChar): cint;
cdecl; external av__format;
(**
* @addtogroup lavf_decoding
* @{
*)
(**
* Find AVInputFormat based on the short name of the input format.
*)
function av_find_input_format(short_name: PAnsiChar): PAVInputFormat;
cdecl; external av__format;
(**
* Guess file format.
*
* @param is_opened Whether the file is already opened; determines whether
* demuxers with or without AVFMT_NOFILE are probed.
*)
function av_probe_input_format(pd: PAVProbeData; is_opened: cint): PAVInputFormat;
cdecl; external av__format;
(**
* Guess the file format.
*
* @param is_opened Whether the file is already opened; determines whether
* demuxers with or without AVFMT_NOFILE are probed.
* @param score_max A probe score larger that this is required to accept a
* detection, the variable is set to the actual detection
* score afterwards.
* If the score is <= AVPROBE_SCORE_MAX / 4 it is recommended
* to retry with a larger probe buffer.
*)
function av_probe_input_format2(pd: PAVProbeData; is_opened: cint; score_max: PCint): PAVInputFormat;
cdecl; external av__format;
(**
* Guess the file format.
*
* @param is_opened Whether the file is already opened; determines whether
* demuxers with or without AVFMT_NOFILE are probed.
* @param score_ret The score of the best detection.
*)
function av_probe_input_format3(pd: PAVProbeData; is_opened: cint; score_ret: Pcint): PAVInputFormat;
cdecl; external av__format;
{$IF FF_API_FORMAT_PARAMETERS}
(**
* Allocate all the structures needed to read an input stream.
* This does not open the needed codecs for decoding the stream[s].
*)
function av_open_input_stream(var ic_ptr: PAVFormatContext;
pb: PByteIOContext; filename: PAnsiChar;
fmt: PAVInputFormat; ap: PAVFormatParameters): cint;
cdecl; external av__format; deprecated;
(**
* Open a media file as input. The codecs are not opened. Only the file
* header (if present) is read.
*
* @param ic_ptr The opened media file handle is put here.
* @param filename filename to open
* @param fmt If non-NULL, force the file format to use.
* @param buf_size optional buffer size (zero if default is OK)
* @param ap Additional parameters needed when opening the file
* (NULL if default).
* @return 0 if OK, AVERROR_xxx otherwise
*)
function av_open_input_file(var ic_ptr: PAVFormatContext; filename: PAnsiChar;
fmt: PAVInputFormat; buf_size: cint;
ap: PAVFormatParameters): cint;
cdecl; external av__format; deprecated;
{$IFEND}
(**
* Open an input stream and read the header. The codecs are not opened.
* The stream must be closed with av_close_input_file().
*
* @param ps Pointer to user-supplied AVFormatContext (allocated by avformat_alloc_context).
* May be a pointer to NULL, in which case an AVFormatContext is allocated by this
* function and written into ps.
* Note that a user-supplied AVFormatContext will be freed on failure.
* @param filename Name of the stream to open.
* @param fmt If non-NULL, this parameter forces a specific input format.
* Otherwise the format is autodetected.
* @param options A dictionary filled with AVFormatContext and demuxer-private options.
* On return this parameter will be destroyed and replaced with a dict containing
* options that were not found. May be NULL.
*
* @return 0 on success, a negative AVERROR on failure.
*
* @note If you want to use custom IO, preallocate the format context and set its pb field.
*)
function avformat_open_input(ps: PPAVFormatContext; {const} filename: PAnsiChar; fmt: PAVInputFormat; options: PPAVDictionary): cint;
cdecl; external av__format;
function av_demuxer_open(ic: PAVFormatContext; ap: TAVFormatParameters): cint;
cdecl; external av__format;
{$IF FF_API_FORMAT_PARAMETERS}
(**
* Read packets of a media file to get stream information. This
* is useful for file formats with no headers such as MPEG. This
* function also computes the real framerate in case of MPEG-2 repeat
* frame mode.
* The logical file position is not changed by this function;
* examined packets may be buffered for later processing.
*
* @param ic media file handle
* @return >=0 if OK, AVERROR_xxx on error
* @todo Let the user decide somehow what information is needed so that
* we do not waste time getting stuff the user does not need.
*)
function av_find_stream_info(ic: PAVFormatContext): cint;
cdecl; external av__format; deprecated;
{$IFEND}
(**
* Read packets of a media file to get stream information. This
* is useful for file formats with no headers such as MPEG. This
* function also computes the real framerate in case of MPEG-2 repeat
* frame mode.
* The logical file position is not changed by this function;
* examined packets may be buffered for later processing.
*
* @param ic media file handle
* @param options If non-NULL, an ic.nb_streams long array of pointers to
* dictionaries, where i-th member contains options for
* codec corresponding to i-th stream.
* On return each dictionary will be filled with options that were not found.
* @return >=0 if OK, AVERROR_xxx on error
*
* @note this function isn't guaranteed to open all the codecs, so
* options being non-empty at return is a perfectly normal behavior.
*
* @todo Let the user decide somehow what information is needed so that
* we do not waste time getting stuff the user does not need.
*)
function avformat_find_stream_info(ic: PAVFormatContext; options: PPAVDictionary): cint;
cdecl; external av__format;
(**
* Find the programs which belong to a given stream.
*
* @param ic media file handle
* @param last the last found program, the search will start after this
* program, or from the beginning if it is NULL
* @param s stream index
* @return the next program which belongs to s, NULL if no program is found or
* the last program is not among the programs of ic.
*)
function av_find_program_from_stream(ic: PAVFormatContext; last: PAVProgram; s: cint): PAVProgram;
cdecl; external av__format;
(**
* Find the "best" stream in the file.
* The best stream is determined according to various heuristics as the most
* likely to be what the user expects.
* If the decoder parameter is non-NULL, av_find_best_stream will find the
* default decoder for the stream's codec; streams for which no decoder can
* be found are ignored.
*
* @param ic media file handle
* @param type stream type: video, audio, subtitles, etc.
* @param wanted_stream_nb user-requested stream number,
* or -1 for automatic selection
* @param related_stream try to find a stream related (eg. in the same
* program) to this one, or -1 if none
* @param decoder_ret if non-NULL, returns the decoder for the
* selected stream
* @param flags flags; none are currently defined
* @return the non-negative stream number in case of success,
* AVERROR_STREAM_NOT_FOUND if no stream with the requested type
* could be found,
* AVERROR_DECODER_NOT_FOUND if streams were found but no decoder
* @note If av_find_best_stream returns successfully and decoder_ret is not
* NULL, then *decoder_ret is guaranteed to be set to a valid AVCodec.
*)
function av_find_best_stream(ic: PAVFormatContext;
type_: TAVMediaType;
wanted_stream_nb: cint;
related_stream: cint;
decoder_ret: PPAVCodec;
flags: cint): cint;
cdecl; external av__format;
(**
* Read a transport packet from a media file.
*
* This function is obsolete and should never be used.
* Use av_read_frame() instead.
*
* @param s media file handle
* @param pkt is filled
* @return 0 if OK, AVERROR_xxx on error
*)
function av_read_packet(s: PAVFormatContext; var pkt: TAVPacket): cint;
cdecl; external av__format;
(**
* Return the next frame of a stream.
* This function returns what is stored in the file, and does not validate
* that what is there are valid frames for the decoder. It will split what is
* stored in the file into frames and return one for each call. It will not
* omit invalid data between valid frames so as to give the decoder the maximum
* information possible for decoding.
*
* The returned packet is valid
* until the next av_read_frame() or until av_close_input_file() and
* must be freed with av_free_packet. For video, the packet contains
* exactly one frame. For audio, it contains an integer number of
* frames if each frame has a known fixed size (e.g. PCM or ADPCM
* data). If the audio frames have a variable size (e.g. MPEG audio),
* then it contains one frame.
*
* pkt->pts, pkt->dts and pkt->duration are always set to correct
* values in AVStream.time_base units (and guessed if the format cannot
* provide them). pkt->pts can be AV_NOPTS_VALUE if the video format
* has B-frames, so it is better to rely on pkt->dts if you do not
* decompress the payload.
*
* @return 0 if OK, < 0 on error or end of file
*)
function av_read_frame(s: PAVFormatContext; var pkt: TAVPacket): cint;
cdecl; external av__format;
(**
* Seek to the keyframe at timestamp.
* 'timestamp' in 'stream_index'.
* @param stream_index If stream_index is (-1), a default
* stream is selected, and timestamp is automatically converted
* from AV_TIME_BASE units to the stream specific time_base.
* @param timestamp Timestamp in AVStream.time_base units
* or, if no stream is specified, in AV_TIME_BASE units.
* @param flags flags which select direction and seeking mode
* @return >= 0 on success
*)
function av_seek_frame(s: PAVFormatContext; stream_index: cint; timestamp: cint64;
flags: cint): cint;
cdecl; external av__format;
(**
* Start playing a network-based stream (e.g. RTSP stream) at the
* current position.
*)
function av_read_play(s: PAVFormatContext): cint;
cdecl; external av__format;
(**
* Pause a network-based stream (e.g. RTSP stream).
*
* Use av_read_play() to resume it.
*)
function av_read_pause(s: PAVFormatContext): cint;
cdecl; external av__format;
{$IF FF_API_FORMAT_PARAMETERS}
(**
* Free a AVFormatContext allocated by av_open_input_stream.
* @param s context to free
* @deprecated use av_close_input_file()
*)
procedure av_close_input_stream(s: PAVFormatContext);
cdecl; external av__format;
{$IFEND}
{$IF FF_API_CLOSE_INPUT_FILE}
(**
* @deprecated use avformat_close_input()
* Close a media file (but not its codecs).
*
* @param s media file handle
*)
procedure av_close_input_file(s: PAVFormatContext);
cdecl; external av__format;
{$IFEND}
(**
* Close an opened input AVFormatContext. Free it and all its contents
* and set *s to NULL.
*)
procedure avformat_close_input(s: PPAVFormatContext);
cdecl; external av__format;
(**
* @}
*)
{$IF FF_API_NEW_STREAM}
(**
* Add a new stream to a media file.
*
* Can only be called in the read_header() function. If the flag
* AVFMTCTX_NOHEADER is in the format context, then new streams
* can be added in read_packet too.
*
* @param s media file handle
* @param id file-format-dependent stream ID
*)
function av_new_stream(s: PAVFormatContext; id: cint): PAVStream;
cdecl; external av__format;
{$IFEND}
{$IF FF_API_SET_PTS_INFO}
(**
* @deprecated this function is not supposed to be called outside of lavf
*)
procedure av_set_pts_info(s: PAVStream; pts_wrap_bits: cint;
pts_num: cuint; pts_den: cuint);
cdecl; external av__format;
{$IFEND}
const
AVSEEK_FLAG_BACKWARD = 1; ///< seek backward
AVSEEK_FLAG_BYTE = 2; ///< seeking based on position in bytes
AVSEEK_FLAG_ANY = 4; ///< seek to any frame, even non-keyframes
AVSEEK_FLAG_FRAME = 8;
{$IF FF_API_SEEK_PUBLIC}
function av_seek_frame_binary(s: PAVFormatContext; stream_index: cint;
target_ts: cint64; flags: cint): cint;
cdecl; external av__format; deprecated;
procedure av_update_cur_dts(s: PAVFormatContext; ref_st: PAVStream;
timestamp: cint64);
cdecl; external av__format; deprecated;
type
TReadTimestampFunc = function (pavfc: PAVFormatContext;
arg2: cint; arg3: Pint64; arg4: cint64): cint64; cdecl; {deprecated}
function av_gen_search(s: PAVFormatContext; stream_index: cint;
target_ts: cint64; pos_min: cint64;
pos_max: cint64; pos_limit: cint64;
ts_min: cint64; ts_max: cint64;
flags: cint; ts_ret: Pint64;
read_timestamp: TReadTimestampFunc): cint64;
cdecl; external av__format; deprecated;
{$IFEND}
{$IF FF_API_FORMAT_PARAMETERS}
(**
* media file output
*)
function av_set_parameters(s: PAVFormatContext; ap: PAVFormatParameters): cint;
cdecl; external av__format;
{$IFEND}
(**
* @addtogroup lavf_encoding
* @{
*)
(**
* Allocate the stream private data and write the stream header to
* an output media file.
*
* @param s Media file handle, must be allocated with avformat_alloc_context().
* Its oformat field must be set to the desired output format;
* Its pb field must be set to an already openened AVIOContext.
* @param options An AVDictionary filled with AVFormatContext and muxer-private options.
* On return this parameter will be destroyed and replaced with a dict containing
* options that were not found. May be NULL.
*
* @return 0 on success, negative AVERROR on failure.
*
* @see av_opt_find, av_dict_set, avio_open, av_oformat_next.
*)
function avformat_write_header(s: PAVFormatContext; options: {PPAVDictionary} pointer): cint;
cdecl; external av__format;
(**
* Allocate the stream private data and write the stream header to an
* output media file.
*
* @param s media file handle
* @return 0 if OK, AVERROR_xxx on error
*)
{$IF FF_API_FORMAT_PARAMETERS}
(**
* Allocate the stream private data and write the stream header to an
* output media file.
* @note: this sets stream time-bases, if possible to stream->codec->time_base
* but for some formats it might also be some other time base
*
* @param s media file handle
* @return 0 if OK, AVERROR_xxx on error
*
* @deprecated use avformat_write_header.
*)
function av_write_header(s: PAVFormatContext): cint; {deprecated}
cdecl; external av__format;
{$IFEND}
(**
* Write a packet to an output media file ensuring correct interleaving.
*
* The packet must contain one audio or video frame.
* If the packets are already correctly interleaved, the application should
* call av_write_frame() instead as it is slightly faster. It is also important
* to keep in mind that completely non-interleaved input will need huge amounts
* of memory to interleave with this, so it is preferable to interleave at the
* demuxer level.
*
* @param s media file handle
* @param pkt The packet containing the data to be written. Libavformat takes
* ownership of the data and will free it when it sees fit using the packet's
* @ref AVPacket.destruct "destruct" field. The caller must not access the data
* after this function returns, as it may already be freed.
* Packet's @ref AVPacket.stream_index "stream_index" field must be set to the
* index of the corresponding stream in @ref AVFormatContext.streams
* "s.streams".
* It is very strongly recommended that timing information (@ref AVPacket.pts
* "pts", @ref AVPacket.dts "dts" @ref AVPacket.duration "duration") is set to
* correct values.
*
* @return 0 on success, a negative AVERROR on error.
*)
function av_interleaved_write_frame(s: PAVFormatContext; var pkt: TAVPacket): cint;
cdecl; external av__format;
(**
* Interleave a packet per dts in an output media file.
*
* Packets with pkt->destruct == av_destruct_packet will be freed inside this
* function, so they cannot be used after it. Note that calling av_free_packet()
* on them is still safe.
*
* @param s media file handle
* @param out the interleaved packet will be output here
* @param pkt the input packet
* @param flush 1 if no further packets are available as input and all
* remaining packets should be output
* @return 1 if a packet was output, 0 if no packet could be output,
* < 0 if an error occurred
*)
function av_interleave_packet_per_dts(s: PAVFormatContext; _out: PAVPacket;
pkt: PAVPacket; flush: cint): cint;
cdecl; external av__format;
(**
* Write the stream trailer to an output media file and free the
* file private data.
*
* May only be called after a successful call to av_write_header.
*
* @param s media file handle
* @return 0 if OK, AVERROR_xxx on error
*)
function av_write_trailer(s: pAVFormatContext): cint;
cdecl; external av__format;
(**
* Return the output format in the list of registered output formats
* which best matches the provided parameters, or return NULL if
* there is no match.
*
* @param short_name if non-NULL checks if short_name matches with the
* names of the registered formats
* @param filename if non-NULL checks if filename terminates with the
* extensions of the registered formats
* @param mime_type if non-NULL checks if mime_type matches with the
* MIME type of the registered formats
*)
function av_guess_format(short_name: PAnsiChar;
filename: PAnsiChar;
mime_type: PAnsiChar): PAVOutputFormat;
cdecl; external av__format;
(**
* Guess the codec ID based upon muxer and filename.
*)
function av_guess_codec(fmt: PAVOutputFormat; short_name: PAnsiChar;
filename: PAnsiChar; mime_type: PAnsiChar;
type_: TCodecType): TCodecID;
cdecl; external av__format;
(**
* Get timing information for the data currently output.
* The exact meaning of "currently output" depends on the format.
* It is mostly relevant for devices that have an internal buffer and/or
* work in real time.
* @param s media file handle
* @param stream stream in the media file
* @param dts[out] DTS of the last packet output for the stream, in stream
* time_base units
* @param wall[out] absolute time when that packet whas output,
* in microsecond
* @return 0 if OK, AVERROR(ENOSYS) if the format does not support it
* Note: some formats or devices may not allow to measure dts and wall
* atomically.
*)
function av_get_output_timestamp(s: PAVFormatContext; stream: cint;
dts: Pcint64; wall: Pcint64): cint;
cdecl; external av__format;
(**
* @}
*)
(**
* @defgroup lavf_misc Utility functions
* @ingroup libavf
* @{
*
* Miscelaneous utility functions related to both muxing and demuxing
* (or neither).
*)
(**
* Send a nice hexadecimal dump of a buffer to the specified file stream.
*
* @param f The file stream pointer where the dump should be sent to.
* @param buf buffer
* @param size buffer size
*
* @see av_hex_dump_log, av_pkt_dump2, av_pkt_dump_log2
*)
procedure av_hex_dump(f: PAVFile; buf: PByteArray; size: cint); {<-?FILE}
cdecl; external av__format;
(**
* Send a nice hexadecimal dump of a buffer to the log.
*
* @param avcl A pointer to an arbitrary struct of which the first field is a
* pointer to an AVClass struct.
* @param level The importance level of the message, lower values signifying
* higher importance.
* @param buf buffer
* @param size buffer size
*
* @see av_hex_dump, av_pkt_dump, av_pkt_dump_log
*)
procedure av_hex_dump_log(avcl: Pointer; level: cint; buf: PByteArray; size: cint);
cdecl; external av__format;
(**
* Send a nice dump of a packet to the specified file stream.
*
* @param f The file stream pointer where the dump should be sent to.
* @param pkt packet to dump
* @param dump_payload True if the payload must be displayed, too.
* @param st AVStream that the packet belongs to
*)
procedure av_pkt_dump2(f: PAVFile; pkt: PAVPacket; dump_payload: cint; st: PAVStream);
cdecl; external av__format;
(**
* Send a nice dump of a packet to the log.
*
* @param avcl A pointer to an arbitrary struct of which the first field is a
* pointer to an AVClass struct.
* @param level The importance level of the message, lower values signifying
* higher importance.
* @param pkt packet to dump
* @param dump_payload True if the payload must be displayed, too.
* @param st AVStream that the packet belongs to
*)
procedure av_pkt_dump_log2(avcl: pointer; level: cint; pkt: PAVPacket; dump_payload: cint;
st: PAVStream);
cdecl; external av__format;
(**
* Get the CodecID for the given codec tag tag.
* If no codec id is found returns CODEC_ID_NONE.
*
* @param tags list of supported codec_id-codec_tag pairs, as stored
* in AVInputFormat.codec_tag and AVOutputFormat.codec_tag
*)
function av_codec_get_id(var tags: PAVCodecTag; tag: cuint): TCodecID;
cdecl; external av__format;
(**
* Getsthe codec tag for the given codec id id.
* If no codec tag is found returns 0.
*
* @param tags list of supported codec_id-codec_tag pairs, as stored
* in AVInputFormat.codec_tag and AVOutputFormat.codec_tag
*)
function av_codec_get_tag(var tags: PAVCodecTag; id: TCodecID): cuint;
cdecl; external av__format;
function av_find_default_stream_index(s: PAVFormatContext): cint;
cdecl; external av__format;
(**
* Get the index for a specific timestamp.
* @param flags if AVSEEK_FLAG_BACKWARD then the returned index will correspond
* to the timestamp which is <= the requested one, if backward
* is 0, then it will be >=
* if AVSEEK_FLAG_ANY seek to any frame, only keyframes otherwise
* @return < 0 if no such timestamp could be found
*)
function av_index_search_timestamp(st: PAVStream; timestamp: cint64; flags: cint): cint;
cdecl; external av__format;
(**
* Add an index entry into a sorted list. Update the entry if the list
* already contains it.
*
* @param timestamp timestamp in the timebase of the given stream
*)
function av_add_index_entry(st: PAVStream; pos: cint64; timestamp: cint64;
size: cint; distance: cint; flags: cint): cint;
cdecl; external av__format;
(**
* Split a URL string into components.
*
* The pointers to buffers for storing individual components may be null,
* in order to ignore that component. Buffers for components not found are
* set to empty strings. If the port is not found, it is set to a negative
* value.
*
* @param proto the buffer for the protocol
* @param proto_size the size of the proto buffer
* @param authorization the buffer for the authorization
* @param authorization_size the size of the authorization buffer
* @param hostname the buffer for the host name
* @param hostname_size the size of the hostname buffer
* @param port_ptr a pointer to store the port number in
* @param path the buffer for the path
* @param path_size the size of the path buffer
* @param url the URL to split
*)
procedure av_url_split(proto: PAnsiChar; proto_size: cint;
authorization: PAnsiChar; authorization_size: cint;
hostname: PAnsiChar; hostname_size: cint;
port_ptr: Pcint;
path: PAnsiChar; path_size: cint;
{const} url: PAnsiChar);
cdecl; external av__format;
{$IF FF_API_DUMP_FORMAT}
(**
* @deprecated Deprecated in favor of av_dump_format().
*)
procedure dump_format(ic: PAVFormatContext; index: cint; url: PAnsiChar;
is_output: cint);
cdecl; external av__format; deprecated;
{$IFEND}
procedure av_dump_format(ic: PAVFormatContext; index: cint; url: PAnsiChar;
is_output: cint);
cdecl; external av__format;
{$IF FF_API_PARSE_DATE}
(**
* Parse datestr and return a corresponding number of microseconds.
*
* @param datestr String representing a date or a duration.
* See av_parse_time() for the syntax of the provided string.
* @deprecated in favor of av_parse_time()
*)
function parse_date(datestr: PAnsiChar; duration: cint): cint64; {deprecated}
cdecl; external av__format; deprecated;
{$IFEND}
(**
* Get the current time in microseconds.
*)
function av_gettime(): cint64;
cdecl; external av__format;
{$IF FF_API_FIND_INFO_TAG}
(**
* @deprecated use av_find_info_tag in libavutil instead.
*)
function find_info_tag(arg: PAnsiChar; arg_size: cint; tag1: PAnsiChar; info: PAnsiChar): cint;
cdecl; external av__format;
{$IFEND}
(**
* Return in 'buf' the path with '%d' replaced by a number.
*
* Also handles the '%0nd' format where 'n' is the total number
* of digits and '%%'.
*
* @param buf destination buffer
* @param buf_size destination buffer size
* @param path numbered sequence string
* @param number frame number
* @return 0 if OK, -1 on format error
*)
function av_get_frame_filename(buf: PAnsiChar; buf_size: cint;
path: PAnsiChar; number: cint): cint;
cdecl; external av__format;
(**
* Check whether filename actually is a numbered sequence generator.
*
* @param filename possible numbered sequence string
* @return 1 if a valid numbered sequence string, 0 otherwise
*)
function av_filename_number_test(filename: PAnsiChar): cint;
cdecl; external av__format;
(**
* Generate an SDP for an RTP session.
*
* @param ac array of AVFormatContexts describing the RTP streams. If the
* array is composed by only one context, such context can contain
* multiple AVStreams (one AVStream per RTP stream). Otherwise,
* all the contexts in the array (an AVCodecContext per RTP stream)
* must contain only one AVStream.
* @param n_files number of AVCodecContexts contained in ac
* @param buf buffer where the SDP will be stored (must be allocated by
* the caller)
* @param size the size of the buffer
* @return 0 if OK, AVERROR_xxx on error
*)
function av_sdp_create(ac: pointer; n_files: cint; buf: PAnsiChar; size: cint): cint;
cdecl; external av__format;
{$IF FF_API_SDP_CREATE}
function avf_sdp_create(ac: PPAVFormatContext; n_files: cint; buff: PByteArray; size: cint): cint;
cdecl; external av__format;
{$IFEND}
(**
* Return a positive value if the given filename has one of the given
* extensions, 0 otherwise.
*
* @param extensions a comma-separated list of filename extensions
*)
function av_match_ext(filename: {const} Pchar; extensions: {const} Pchar): cint;
cdecl; external av__format;
(**
* Test if the given container can store a codec.
*
* @param std_compliance standards compliance level, one of FF_COMPLIANCE_*
*
* @return 1 if codec with ID codec_id can be stored in ofmt, 0 if it cannot.
* A negative number if this information is not available.
*)
function avformat_query_codec(ofmt: PAVOutputFormat; codec_id: TCodecID; std_compliance: cint): cint;
cdecl; external av__format;
(**
* @defgroup riff_fourcc RIFF FourCCs
* @{
* Get the tables mapping RIFF FourCCs to libavcodec CodecIDs. The tables are
* meant to be passed to av_codec_get_id()/av_codec_get_tag() as in the
* following code:
* @code
* uint32_t tag = MKTAG('H', '2', '6', '4');
* const struct AVCodecTag *table[] = { avformat_get_riff_video_tags(), 0 };
* enum CodecID id = av_codec_get_id(table, tag);
* @endcode
*)
(**
* @return the table mapping RIFF FourCCs for video to libavcodec CodecID.
*)
function avformat_get_riff_video_tags(): {const} PAVCodecTag;
cdecl; external av__format;
(**
* @return the table mapping RIFF FourCCs for audio to CodecID.
*)
function avformat_get_riff_audio_tags(): {const} PAVCodecTag;
cdecl; external av__format;
(**
* @}
*)
(**
* @}
*)
implementation
end.
|