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3719602c PC |
1 | /* Copyright (C) 2010-2020 The RetroArch team |
2 | * | |
3 | * --------------------------------------------------------------------------------------- | |
4 | * The following license statement only applies to this file (cdfs.h). | |
5 | * --------------------------------------------------------------------------------------- | |
6 | * | |
7 | * Permission is hereby granted, free of charge, | |
8 | * to any person obtaining a copy of this software and associated documentation files (the "Software"), | |
9 | * to deal in the Software without restriction, including without limitation the rights to | |
10 | * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, | |
11 | * and to permit persons to whom the Software is furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, | |
16 | * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. | |
18 | * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, | |
19 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |
21 | */ | |
22 | ||
23 | #ifndef __RARCH_CDFS_H | |
24 | #define __RARCH_CDFS_H | |
25 | ||
26 | #include <streams/interface_stream.h> | |
27 | ||
28 | RETRO_BEGIN_DECLS | |
29 | ||
30 | /* these functions provide an interface for locating and reading files within a data track | |
31 | * of a CD (following the ISO-9660 directory structure definition) | |
32 | */ | |
33 | ||
34 | typedef struct cdfs_track_t | |
35 | { | |
36 | intfstream_t* stream; | |
37 | unsigned int stream_sector_size; | |
38 | unsigned int stream_sector_header_size; | |
39 | unsigned int first_sector_offset; | |
40 | unsigned int first_sector_index; | |
41 | } cdfs_track_t; | |
42 | ||
43 | typedef struct cdfs_file_t | |
44 | { | |
45 | struct cdfs_track_t* track; | |
46 | int first_sector; | |
47 | int current_sector; | |
48 | int sector_buffer_valid; | |
49 | unsigned int current_sector_offset; | |
50 | unsigned int size; | |
51 | unsigned int pos; | |
52 | uint8_t sector_buffer[2048]; | |
53 | } cdfs_file_t; | |
54 | ||
55 | /* opens the specified file within the CD or virtual CD. | |
56 | * if path is NULL, will open the raw CD (useful for | |
57 | * reading CD without having to worry about sector sizes, | |
58 | * headers, or checksum data) | |
59 | */ | |
60 | int cdfs_open_file(cdfs_file_t* file, cdfs_track_t* stream, const char* path); | |
61 | ||
62 | void cdfs_close_file(cdfs_file_t* file); | |
63 | ||
64 | int64_t cdfs_read_file(cdfs_file_t* file, void* buffer, uint64_t len); | |
65 | ||
66 | int64_t cdfs_get_size(cdfs_file_t* file); | |
67 | ||
68 | int64_t cdfs_tell(cdfs_file_t* file); | |
69 | ||
70 | int64_t cdfs_seek(cdfs_file_t* file, int64_t offset, int whence); | |
71 | ||
72 | void cdfs_seek_sector(cdfs_file_t* file, unsigned int sector); | |
73 | ||
74 | uint32_t cdfs_get_num_sectors(cdfs_file_t* file); | |
75 | ||
76 | uint32_t cdfs_get_first_sector(cdfs_file_t* file); | |
77 | ||
78 | /* opens the specified track in a CD or virtual CD file - the resulting stream should be passed to | |
79 | * cdfs_open_file to get access to a file within the CD. | |
80 | * | |
81 | * supported files: | |
82 | * real CD - path will be in the form "cdrom://drive1.cue" or "cdrom://d:/drive.cue" | |
83 | * bin/cue - path will point to the cue file | |
84 | * chd - path will point to the chd file | |
85 | * | |
86 | * for bin/cue files, the following storage modes are supported: | |
87 | * MODE2/2352 | |
88 | * MODE1/2352 | |
89 | * MODE1/2048 - untested | |
90 | * MODE2/2336 - untested | |
91 | */ | |
92 | cdfs_track_t* cdfs_open_track(const char* path, unsigned int track_index); | |
93 | ||
94 | /* opens the first data track in a CD or virtual CD file. see cdfs_open_track for supported file formats | |
95 | */ | |
96 | cdfs_track_t* cdfs_open_data_track(const char* path); | |
97 | ||
98 | /* opens a raw track file for a CD or virtual CD. | |
99 | * | |
100 | * supported files: | |
101 | * real CD - path will be in the form "cdrom://drive1-track01.bin" or "cdrom://d:/drive-track01.bin" | |
102 | * NOTE: cue file for CD must be opened first to populate vfs_cdrom_toc. | |
103 | * bin - path will point to the bin file | |
104 | * iso - path will point to the iso file | |
105 | */ | |
106 | cdfs_track_t* cdfs_open_raw_track(const char* path); | |
107 | ||
108 | /* closes the CD or virtual CD track and frees the associated memory */ | |
109 | void cdfs_close_track(cdfs_track_t* track); | |
110 | ||
111 | RETRO_END_DECLS | |
112 | ||
113 | #endif /* __RARCH_CDFS_H */ |