1 /*
2 * Sierra SOL demuxer
3 * Copyright Konstantin Shishkov
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 * Based on documents from Game Audio Player and own research
24 */
25
31
32 /* if we don't know the size in advance */
33 #define AU_UNKNOWN_SIZE ((uint32_t)(~0))
34
36 {
37 /* check file header */
39 if ((magic == 0x0B8D || magic == 0x0C0D || magic == 0x0C8D) &&
40 p->
buf[2] ==
'S' && p->
buf[3] ==
'O' &&
41 p->
buf[4] ==
'L' && p->
buf[5] == 0)
43 else
44 return 0;
45 }
46
50
52 {
55
56 if (magic == 0x0B8D)
58
61
63 }
64
66 {
67 if (magic == 0x0B8D) return 1;//SOL_DPCM_OLD;
69 {
70 if (type &
SOL_16BIT)
return 3;
//SOL_DPCM_NEW16;
71 else if (magic == 0x0C8D) return 1;//SOL_DPCM_OLD;
72 else return 2;//SOL_DPCM_NEW8;
73 }
74 return -1;
75 }
76
78 {
79 if (magic == 0x0B8D || !(type &
SOL_STEREO))
return 1;
80 return 2;
81 }
82
84 {
85 unsigned int magic,
tag;
87 unsigned int id, channels, rate,
type;
90
91 /* check ".snd" header */
94 if (tag !=
MKTAG(
'S',
'O',
'L', 0))
95 return -1;
99 if (magic != 0x0B8D)
100 avio_r8(pb);
/* newer SOLs contain padding byte */
101
104
107 else id = 0;
108
109 /* now we are ready: build format streams */
111 if (!st)
112 return -1;
121 return 0;
122 }
123
124 #define MAX_SIZE 4096
125
128 {
130
134 if (ret < 0)
138 return 0;
139 }
140
148 };