1 /*
2 * Bethesda VID video decoder
3 * Copyright (C) 2007 Nicholas Tung
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 * @brief Bethesda Softworks VID Video Decoder
25 * @author Nicholas Tung [ntung (at. ntung com] (2007-03)
26 * @see http://wiki.multimedia.cx/index.php?title=Bethsoft_VID
27 * @see http://www.svatopluk.com/andux/docs/dfvid.html
28 */
29
36
41
43 {
46
50
51 return 0;
52 }
53
55 {
56 uint32_t *palette = (uint32_t *)
ctx->frame->data[1];
58
61
62 for(
a = 0;
a < 256;
a++){
63 palette[
a] = 0xFF
U << 24 | bytestream2_get_be24u(
g) * 4;
64 palette[
a] |= palette[
a] >> 6 & 0x30303;
65 }
66 return 0;
67 }
68
71 {
73 char block_type;
76 int remaining = avctx->
width;
// number of bytes remaining on a line
77 int wrap_to_next_line;
79 int yoffset;
80
82 block_type = bytestream2_get_byte(&vid->
g);
83 if (block_type < 1 || block_type > 4)
85
89
97 }
98
101
102 switch(block_type){
104 *got_frame = 0;
108 }
110 }
112 yoffset = bytestream2_get_le16(&vid->
g);
113 if(yoffset >= avctx->
height)
118 break;
119 default:
121 }
122
123 // main code
124 while((
code = bytestream2_get_byte(&vid->
g))){
125 int length =
code & 0x7f;
126
127 // copy any bytes starting at the current position, and ending at the frame width
128 while(length > remaining){
132 memset(
dst, bytestream2_peek_byte(&vid->
g), remaining);
133 length -= remaining; // decrement the number of bytes to be copied
134 dst += remaining + wrap_to_next_line;
// skip over extra bytes at end of frame
135 remaining = avctx->
width;
137 goto end;
138 }
139
140 // copy any remaining bytes after / if line overflows
144 memset(
dst, bytestream2_get_byte(&vid->
g), length);
145 remaining -= length;
147 }
148 end:
149
152
153 *got_frame = 1;
154
156 }
157
159 {
162 return 0;
163 }
164
166 .
p.
name =
"bethsoftvid",
175 };