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 #if FF_API_PALETTE_HAS_CHANGED
68 ctx->frame->palette_has_changed = 1;
70 #endif
71 return 0;
72 }
73
76 {
78 char block_type;
81 int remaining = avctx->
width;
// number of bytes remaining on a line
82 int wrap_to_next_line;
84 int yoffset;
85
87 block_type = bytestream2_get_byte(&vid->
g);
88 if (block_type < 1 || block_type > 4)
90
94
102 }
103
106
107 switch(block_type){
109 *got_frame = 0;
113 }
115 }
117 yoffset = bytestream2_get_le16(&vid->
g);
118 if(yoffset >= avctx->
height)
123 break;
124 default:
126 }
127
128 // main code
129 while((
code = bytestream2_get_byte(&vid->
g))){
130 int length =
code & 0x7f;
131
132 // copy any bytes starting at the current position, and ending at the frame width
133 while(length > remaining){
137 memset(
dst, bytestream2_peek_byte(&vid->
g), remaining);
138 length -= remaining; // decrement the number of bytes to be copied
139 dst += remaining + wrap_to_next_line;
// skip over extra bytes at end of frame
140 remaining = avctx->
width;
142 goto end;
143 }
144
145 // copy any remaining bytes after / if line overflows
149 memset(
dst, bytestream2_get_byte(&vid->
g), length);
150 remaining -= length;
152 }
153 end:
154
157
158 *got_frame = 1;
159
161 }
162
164 {
167 return 0;
168 }
169
171 .
p.
name =
"bethsoftvid",
180 };