dynamic_flac.c
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
SDL_mixer: An audio mixer library based on the SDL library
Copyright (C) 1997-2012 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
Implementation of the dynamic loading functionality for libFLAC.
~ Austen Dicken (admin@cvpcs.org)
23
24
25
26
27
28
29
30
31
32
33
34
35
*/
#ifdef FLAC_MUSIC
#include "SDL_loadso.h"
#include "dynamic_flac.h"
flac_loader flac = {
0, NULL
};
#ifdef FLAC_DYNAMIC
36
37
int Mix_InitFLAC()
{
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
if ( flac.loaded == 0 ) {
flac.handle = SDL_LoadObject(FLAC_DYNAMIC);
if ( flac.handle == NULL ) {
return -1;
}
flac.FLAC__stream_decoder_new =
(FLAC__StreamDecoder *(*)())
SDL_LoadFunction(flac.handle, "FLAC__stream_decoder_new");
if ( flac.FLAC__stream_decoder_new == NULL ) {
SDL_UnloadObject(flac.handle);
return -1;
}
flac.FLAC__stream_decoder_delete =
(void (*)(FLAC__StreamDecoder *))
SDL_LoadFunction(flac.handle, "FLAC__stream_decoder_delete");
if ( flac.FLAC__stream_decoder_delete == NULL ) {
SDL_UnloadObject(flac.handle);
return -1;
}
flac.FLAC__stream_decoder_init_stream =
(FLAC__StreamDecoderInitStatus (*)(
FLAC__StreamDecoder *,
FLAC__StreamDecoderReadCallback,
FLAC__StreamDecoderSeekCallback,
FLAC__StreamDecoderTellCallback,
FLAC__StreamDecoderLengthCallback,
FLAC__StreamDecoderEofCallback,
FLAC__StreamDecoderWriteCallback,
FLAC__StreamDecoderMetadataCallback,
FLAC__StreamDecoderErrorCallback,
void *))
SDL_LoadFunction(flac.handle, "FLAC__stream_decoder_init_stream");
if ( flac.FLAC__stream_decoder_init_stream == NULL ) {
SDL_UnloadObject(flac.handle);
return -1;
}
flac.FLAC__stream_decoder_finish =
(FLAC__bool (*)(FLAC__StreamDecoder *))
SDL_LoadFunction(flac.handle, "FLAC__stream_decoder_finish");
if ( flac.FLAC__stream_decoder_finish == NULL ) {
SDL_UnloadObject(flac.handle);
return -1;
}
flac.FLAC__stream_decoder_flush =
(FLAC__bool (*)(FLAC__StreamDecoder *))
SDL_LoadFunction(flac.handle, "FLAC__stream_decoder_flush");
if ( flac.FLAC__stream_decoder_flush == NULL ) {
SDL_UnloadObject(flac.handle);
return -1;
}
flac.FLAC__stream_decoder_process_single =
(FLAC__bool (*)(FLAC__StreamDecoder *))
SDL_LoadFunction(flac.handle,
"FLAC__stream_decoder_process_single");
if ( flac.FLAC__stream_decoder_process_single == NULL ) {
SDL_UnloadObject(flac.handle);
return -1;
}
flac.FLAC__stream_decoder_process_until_end_of_metadata =
(FLAC__bool (*)(FLAC__StreamDecoder *))
SDL_LoadFunction(flac.handle,
"FLAC__stream_decoder_process_until_end_of_metadata");
if ( flac.FLAC__stream_decoder_process_until_end_of_metadata == NULL ) {
SDL_UnloadObject(flac.handle);
return -1;
}
flac.FLAC__stream_decoder_process_until_end_of_stream =
(FLAC__bool (*)(FLAC__StreamDecoder *))
SDL_LoadFunction(flac.handle,
"FLAC__stream_decoder_process_until_end_of_stream");
if ( flac.FLAC__stream_decoder_process_until_end_of_stream == NULL ) {
SDL_UnloadObject(flac.handle);
return -1;
}
flac.FLAC__stream_decoder_seek_absolute =
(FLAC__bool (*)(FLAC__StreamDecoder *, FLAC__uint64))
SDL_LoadFunction(flac.handle, "FLAC__stream_decoder_seek_absolute");
if ( flac.FLAC__stream_decoder_seek_absolute == NULL ) {
SDL_UnloadObject(flac.handle);
return -1;
}
flac.FLAC__stream_decoder_get_state =
(FLAC__StreamDecoderState (*)(const FLAC__StreamDecoder *decoder))
SDL_LoadFunction(flac.handle, "FLAC__stream_decoder_get_state");
if ( flac.FLAC__stream_decoder_get_state == NULL ) {
SDL_UnloadObject(flac.handle);
return -1;
}
}
++flac.loaded;
return 0;
}
131
132
void Mix_QuitFLAC()
{
133
134
135
136
137
138
139
140
141
if ( flac.loaded == 0 ) {
return;
}
if ( flac.loaded == 1 ) {
SDL_UnloadObject(flac.handle);
}
--flac.loaded;
}
#else
142
143
int Mix_InitFLAC()
{
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
if ( flac.loaded == 0 ) {
flac.FLAC__stream_decoder_new = FLAC__stream_decoder_new;
flac.FLAC__stream_decoder_delete = FLAC__stream_decoder_delete;
flac.FLAC__stream_decoder_init_stream =
FLAC__stream_decoder_init_stream;
flac.FLAC__stream_decoder_finish = FLAC__stream_decoder_finish;
flac.FLAC__stream_decoder_flush = FLAC__stream_decoder_flush;
flac.FLAC__stream_decoder_process_single =
FLAC__stream_decoder_process_single;
flac.FLAC__stream_decoder_process_until_end_of_metadata =
FLAC__stream_decoder_process_until_end_of_metadata;
flac.FLAC__stream_decoder_process_until_end_of_stream =
FLAC__stream_decoder_process_until_end_of_stream;
flac.FLAC__stream_decoder_seek_absolute =
FLAC__stream_decoder_seek_absolute;
flac.FLAC__stream_decoder_get_state =
FLAC__stream_decoder_get_state;
}
++flac.loaded;
return 0;
}
166
167
void Mix_QuitFLAC()
{
168
169
170
171
172
173
174
if ( flac.loaded == 0 ) {
return;
}
if ( flac.loaded == 1 ) {
}
--flac.loaded;
}
175
176
177
#endif /* FLAC_DYNAMIC */
#endif /* FLAC_MUSIC */