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
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
|
/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2012 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
/**
* @file SDL_cdrom.h
* This is the CD-audio control API for Simple DirectMedia Layer
*/
#ifndef _SDL_cdrom_h
#define _SDL_cdrom_h
#include "SDL_stdinc.h"
#include "SDL_error.h"
#include "begin_code.h"
/* Set up for C function definitions, even when using C++ */
#ifdef __cplusplus
extern "C" {
#endif
/**
* @file SDL_cdrom.h
* In order to use these functions, SDL_Init() must have been called
* with the SDL_INIT_CDROM flag. This causes SDL to scan the system
* for CD-ROM drives, and load appropriate drivers.
*/
/** The maximum number of CD-ROM tracks on a disk */
#define SDL_MAX_TRACKS 99
/** @name Track Types
* The types of CD-ROM track possible
*/
/*@{*/
#define SDL_AUDIO_TRACK 0x00
#define SDL_DATA_TRACK 0x04
/*@}*/
/** The possible states which a CD-ROM drive can be in. */
typedef enum {
CD_TRAYEMPTY,
CD_STOPPED,
CD_PLAYING,
CD_PAUSED,
CD_ERROR = -1
} CDstatus;
/** Given a status, returns true if there's a disk in the drive */
#define CD_INDRIVE(status) ((int)(status) > 0)
typedef struct SDL_CDtrack {
Uint8 id; /**< Track number */
Uint8 type; /**< Data or audio track */
Uint16 unused;
Uint32 length; /**< Length, in frames, of this track */
Uint32 offset; /**< Offset, in frames, from start of disk */
} SDL_CDtrack;
/** This structure is only current as of the last call to SDL_CDStatus() */
typedef struct SDL_CD {
int id; /**< Private drive identifier */
CDstatus status; /**< Current drive status */
/** The rest of this structure is only valid if there's a CD in drive */
/*@{*/
int numtracks; /**< Number of tracks on disk */
int cur_track; /**< Current track position */
int cur_frame; /**< Current frame offset within current track */
SDL_CDtrack track[SDL_MAX_TRACKS+1];
/*@}*/
} SDL_CD;
/** @name Frames / MSF Conversion Functions
* Conversion functions from frames to Minute/Second/Frames and vice versa
*/
/*@{*/
#define CD_FPS 75
#define FRAMES_TO_MSF(f, M,S,F) { \
int value = f; \
*(F) = value%CD_FPS; \
value /= CD_FPS; \
*(S) = value%60; \
value /= 60; \
*(M) = value; \
}
#define MSF_TO_FRAMES(M, S, F) ((M)*60*CD_FPS+(S)*CD_FPS+(F))
/*@}*/
/* CD-audio API functions: */
/**
* Returns the number of CD-ROM drives on the system, or -1 if
* SDL_Init() has not been called with the SDL_INIT_CDROM flag.
*/
extern DECLSPEC int SDLCALL SDL_CDNumDrives(void);
/**
* Returns a human-readable, system-dependent identifier for the CD-ROM.
* Example:
* - "/dev/cdrom"
* - "E:"
* - "/dev/disk/ide/1/master"
*/
extern DECLSPEC const char * SDLCALL SDL_CDName(int drive);
/**
* Opens a CD-ROM drive for access. It returns a drive handle on success,
* or NULL if the drive was invalid or busy. This newly opened CD-ROM
* becomes the default CD used when other CD functions are passed a NULL
* CD-ROM handle.
* Drives are numbered starting with 0. Drive 0 is the system default CD-ROM.
*/
extern DECLSPEC SDL_CD * SDLCALL SDL_CDOpen(int drive);
/**
* This function returns the current status of the given drive.
* If the drive has a CD in it, the table of contents of the CD and current
* play position of the CD will be stored in the SDL_CD structure.
*/
extern DECLSPEC CDstatus SDLCALL SDL_CDStatus(SDL_CD *cdrom);
/**
* Play the given CD starting at 'start_track' and 'start_frame' for 'ntracks'
* tracks and 'nframes' frames. If both 'ntrack' and 'nframe' are 0, play
* until the end of the CD. This function will skip data tracks.
* This function should only be called after calling SDL_CDStatus() to
* get track information about the CD.
* For example:
* @code
* // Play entire CD:
* if ( CD_INDRIVE(SDL_CDStatus(cdrom)) )
* SDL_CDPlayTracks(cdrom, 0, 0, 0, 0);
* // Play last track:
* if ( CD_INDRIVE(SDL_CDStatus(cdrom)) ) {
* SDL_CDPlayTracks(cdrom, cdrom->numtracks-1, 0, 0, 0);
* }
* // Play first and second track and 10 seconds of third track:
* if ( CD_INDRIVE(SDL_CDStatus(cdrom)) )
* SDL_CDPlayTracks(cdrom, 0, 0, 2, 10);
* @endcode
*
* @return This function returns 0, or -1 if there was an error.
*/
extern DECLSPEC int SDLCALL SDL_CDPlayTracks(SDL_CD *cdrom,
int start_track, int start_frame, int ntracks, int nframes);
/**
* Play the given CD starting at 'start' frame for 'length' frames.
* @return It returns 0, or -1 if there was an error.
*/
extern DECLSPEC int SDLCALL SDL_CDPlay(SDL_CD *cdrom, int start, int length);
/** Pause play
* @return returns 0, or -1 on error
*/
extern DECLSPEC int SDLCALL SDL_CDPause(SDL_CD *cdrom);
/** Resume play
* @return returns 0, or -1 on error
*/
extern DECLSPEC int SDLCALL SDL_CDResume(SDL_CD *cdrom);
/** Stop play
* @return returns 0, or -1 on error
*/
extern DECLSPEC int SDLCALL SDL_CDStop(SDL_CD *cdrom);
/** Eject CD-ROM
* @return returns 0, or -1 on error
*/
extern DECLSPEC int SDLCALL SDL_CDEject(SDL_CD *cdrom);
/** Closes the handle for the CD-ROM drive */
extern DECLSPEC void SDLCALL SDL_CDClose(SDL_CD *cdrom);
/* Ends C function definitions when using C++ */
#ifdef __cplusplus
}
#endif
#include "close_code.h"
#endif /* _SDL_video_h */
|
