1 /*
2 * DPX parser
3 * Copyright (c) 2013 Paul B Mahol
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 */
21
22 /**
23 * @file
24 * DPX parser
25 */
26
29
31
39
41 const uint8_t **poutbuf, int *poutbuf_size,
42 const uint8_t *buf, int buf_size)
43 {
45 uint32_t
state =
d->pc.state;
48
50
51 *poutbuf_size = 0;
52 if (buf_size == 0)
53 next = 0;
54
55 if (!
d->pc.frame_start_found) {
56 for (;
i < buf_size;
i++) {
60 d->pc.frame_start_found = 1;
63 break;
64 }
65 }
67 } else {
68 if (
d->remaining_size) {
69 i =
FFMIN(
d->remaining_size, buf_size);
70 d->remaining_size -=
i;
71 if (
d->remaining_size)
73 }
74 }
75
76 for (;
d->pc.frame_start_found &&
i < buf_size;
i++) {
77 d->pc.state = (
d->pc.state << 8) | buf[
i];
81 if (
d->fsize <= 1664) {
82 d->pc.frame_start_found = 0;
84 }
85 if (
d->fsize > buf_size -
i + 19)
86 d->remaining_size =
d->fsize - buf_size +
i - 19;
87 else
89
90 break;
91 }
else if (
d->index > 17) {
92 if (
d->pc.state ==
MKBETAG(
'S',
'D',
'P',
'X') ||
93 d->pc.state ==
MKTAG(
'S',
'D',
'P',
'X')) {
95 break;
96 }
97 }
98 }
99
102 return buf_size;
103
104 d->pc.frame_start_found = 0;
105
106 *poutbuf = buf;
107 *poutbuf_size = buf_size;
108 return next;
109 }
110
116 };