1 /*
2 SDL_mixer: An audio mixer library based on the SDL library
3 Copyright (C) 1997-2009 Sam Lantinga
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public
7 License as published by the Free Software Foundation; either
8 version 2 of the License, or (at your option) any later version.
9
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
14
15 You should have received a copy of the GNU Library General Public
16 License along with this library; if not, write to the Free
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
19 Sam Lantinga
20 slouken@libsdl.org
21 */
22
23 #ifdef OGG_MUSIC
24
25 #include "SDL_loadso.h"
26
27 #include "dynamic_ogg.h"
28
29 vorbis_loader vorbis = {
30 0, NULL
31 };
32
33 #ifdef OGG_DYNAMIC
Mix_InitOgg()34 int Mix_InitOgg()
35 {
36 if ( vorbis.loaded == 0 ) {
37 vorbis.handle = SDL_LoadObject(OGG_DYNAMIC);
38 if ( vorbis.handle == NULL ) {
39 return -1;
40 }
41 vorbis.ov_clear =
42 (int (*)(OggVorbis_File *))
43 SDL_LoadFunction(vorbis.handle, "ov_clear");
44 if ( vorbis.ov_clear == NULL ) {
45 SDL_UnloadObject(vorbis.handle);
46 return -1;
47 }
48 vorbis.ov_info =
49 (vorbis_info *(*)(OggVorbis_File *,int))
50 SDL_LoadFunction(vorbis.handle, "ov_info");
51 if ( vorbis.ov_info == NULL ) {
52 SDL_UnloadObject(vorbis.handle);
53 return -1;
54 }
55 vorbis.ov_open_callbacks =
56 (int (*)(void *, OggVorbis_File *, char *, long, ov_callbacks))
57 SDL_LoadFunction(vorbis.handle, "ov_open_callbacks");
58 if ( vorbis.ov_open_callbacks == NULL ) {
59 SDL_UnloadObject(vorbis.handle);
60 return -1;
61 }
62 vorbis.ov_pcm_total =
63 (ogg_int64_t (*)(OggVorbis_File *,int))
64 SDL_LoadFunction(vorbis.handle, "ov_pcm_total");
65 if ( vorbis.ov_pcm_total == NULL ) {
66 SDL_UnloadObject(vorbis.handle);
67 return -1;
68 }
69 vorbis.ov_read =
70 #ifdef OGG_USE_TREMOR
71 (long (*)(OggVorbis_File *,char *,int,int *))
72 #else
73 (long (*)(OggVorbis_File *,char *,int,int,int,int,int *))
74 #endif
75 SDL_LoadFunction(vorbis.handle, "ov_read");
76 if ( vorbis.ov_read == NULL ) {
77 SDL_UnloadObject(vorbis.handle);
78 return -1;
79 }
80 vorbis.ov_time_seek =
81 (int (*)(OggVorbis_File *,double))
82 SDL_LoadFunction(vorbis.handle, "ov_time_seek");
83 if ( vorbis.ov_time_seek == NULL ) {
84 SDL_UnloadObject(vorbis.handle);
85 return -1;
86 }
87 }
88 ++vorbis.loaded;
89
90 return 0;
91 }
Mix_QuitOgg()92 void Mix_QuitOgg()
93 {
94 if ( vorbis.loaded == 0 ) {
95 return;
96 }
97 if ( vorbis.loaded == 1 ) {
98 SDL_UnloadObject(vorbis.handle);
99 }
100 --vorbis.loaded;
101 }
102 #else
Mix_InitOgg()103 int Mix_InitOgg()
104 {
105 if ( vorbis.loaded == 0 ) {
106 vorbis.ov_clear = ov_clear;
107 vorbis.ov_info = ov_info;
108 vorbis.ov_open_callbacks = ov_open_callbacks;
109 vorbis.ov_pcm_total = ov_pcm_total;
110 vorbis.ov_read = ov_read;
111 vorbis.ov_time_seek = ov_time_seek;
112 }
113 ++vorbis.loaded;
114
115 return 0;
116 }
Mix_QuitOgg()117 void Mix_QuitOgg()
118 {
119 if ( vorbis.loaded == 0 ) {
120 return;
121 }
122 if ( vorbis.loaded == 1 ) {
123 }
124 --vorbis.loaded;
125 }
126 #endif /* OGG_DYNAMIC */
127
128 #endif /* OGG_MUSIC */
129