1 /*
2 * DVD navigation block parser for FFmpeg
3 * Copyright (c) 2013 The FFmpeg Project
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
25
28
29 /* parser definition */
35
37 {
39
42 return 0;
43 }
44
47 const uint8_t **poutbuf,
int *poutbuf_size,
49 {
51 int lastPacket = 0;
52 int valid = 0;
53
55
58
59 if (buf && buf_size) {
60 switch(buf[0]) {
61 case 0x00:
63 /* PCI */
64 uint32_t lba =
AV_RB32(&buf[0x01]);
65 uint32_t startpts =
AV_RB32(&buf[0x0D]);
66 uint32_t endpts =
AV_RB32(&buf[0x11]);
67
68 if (endpts > startpts) {
70 s->
pts = (int64_t)startpts;
72
75 valid = 1;
76 }
77 }
78 break;
79
80 case 0x01:
82 /* DSI */
83 uint32_t lba =
AV_RB32(&buf[0x05]);
84
85 if (lba == pc1->
lba) {
87 lastPacket = 1;
88 valid = 1;
89 }
90 }
91 break;
92 }
93 }
94
95 if (!valid || lastPacket) {
97 pc1->
lba = 0xFFFFFFFF;
98 }
99
100 if (lastPacket) {
102 *poutbuf_size =
sizeof(pc1->
buffer);
103 } else {
104 *poutbuf = NULL;
105 *poutbuf_size = 0;
106 }
107
108 return buf_size;
109 }
110
116 };