1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
/*
File: file_ra.c
Copyright (C) 2007 Christophe GRENIER <grenier@cgsecurity.org>
This software is free software; you can redistribute it and/or modify
it under the teras of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write the Free Software Foundation, Inc., 51
Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#if !defined(SINGLE_FORMAT) || defined(SINGLE_FORMAT_ra)
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include <stdio.h>
#include "types.h"
#include "common.h"
#include "filegen.h"
/*@ requires valid_register_header_check(file_stat); */
static void register_header_check_ra(file_stat_t *file_stat);
const file_hint_t file_hint_ra= {
.extension="ra",
.description="Real Audio",
.max_filesize=PHOTOREC_MAX_FILE_SIZE,
.recover=1,
.enable_by_default=1,
.register_header_check=®ister_header_check_ra
};
struct ra3_header {
char magic[4];
uint16_t version; /* 3 */
uint16_t header_size; /* not including first 8 bytes */
char unk1[10];
uint32_t data_size;
uint8_t title_length;
#if 0
char title[0];
#endif
} __attribute__ ((gcc_struct, __packed__));
struct ra4_header {
char magic[4];
uint16_t version; /* 4 */
uint16_t unused; /* always 0 */
char sign[4]; /* .ra4 */
uint32_t data_size;
uint16_t version2;
uint16_t header_size; /* not including the first 20 bytes ? */
uint16_t codec_flavor;
uint32_t codec_frame_size;
char unk1[12];
uint16_t sub_packet_h;
uint16_t frame_size;
uint16_t subpacket_size;
uint16_t unk2;
uint16_t samplerate;
uint16_t unk3;
uint16_t sample_size;
uint16_t channels;
char interleaver_ID_length; /* always 4 */
char interleaver_ID[4];
char FourCC_length; /* always 4 */
char FourCC_string[4];
char unk4[3];
uint8_t title_length;
#if 0
char title[0];
#endif
} __attribute__ ((gcc_struct, __packed__));
/*@
@ requires buffer_size >= sizeof(struct ra3_header);
@ requires buffer_size >= sizeof(struct ra4_header);
@ requires separation: \separated(&file_hint_ra, buffer+(..), file_recovery, file_recovery_new);
@ requires valid_header_check_param(buffer, buffer_size, safe_header_only, file_recovery, file_recovery_new);
@ ensures valid_header_check_result(\result, file_recovery_new);
@ assigns *file_recovery_new;
@*/
static int header_check_ra(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new)
{
if(buffer[4]==0x00 && buffer[5]==0x03)
{ /* V3 */
const struct ra3_header *ra3=(const struct ra3_header *)buffer;
reset_file_recovery(file_recovery_new);
file_recovery_new->extension=file_hint_ra.extension;
file_recovery_new->calculated_file_size=(uint64_t)8 + be16(ra3->header_size) + be32(ra3->data_size);
file_recovery_new->data_check=&data_check_size;
file_recovery_new->file_check=&file_check_size;
return 1;
}
else if(buffer[4]==0x00 && buffer[5]==0x04 &&
buffer[8]=='.' && buffer[9]=='r' && buffer[10]=='a' && buffer[11]=='4')
{ /* V4 */
const struct ra4_header *ra4=(const struct ra4_header *)buffer;
reset_file_recovery(file_recovery_new);
file_recovery_new->extension=file_hint_ra.extension;
file_recovery_new->calculated_file_size=(uint64_t)40 + be16(ra4->header_size) + be32(ra4->data_size);
file_recovery_new->data_check=&data_check_size;
file_recovery_new->file_check=&file_check_size;
return 1;
}
return 0;
}
static void register_header_check_ra(file_stat_t *file_stat)
{
static const unsigned char ra_header[4] = { '.', 'r', 'a', 0xfd};
register_header_check(0, ra_header,sizeof(ra_header), &header_check_ra, file_stat);
}
#endif
|
