dynamic_ogg.c
上传用户:nini_0081
上传日期:2022-07-21
资源大小:2628k
文件大小:3k
- /*
- SDL_mixer: An audio mixer library based on the SDL library
- Copyright (C) 1997-2009 Sam Lantinga
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License as published by the Free Software Foundation; either
- version 2 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
- Library General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with this library; if not, write to the Free
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- Sam Lantinga
- slouken@libsdl.org
- */
- #ifdef OGG_MUSIC
- #include "SDL_loadso.h"
- #include "dynamic_ogg.h"
- vorbis_loader vorbis = {
- 0, NULL
- };
- #ifdef OGG_DYNAMIC
- int Mix_InitOgg()
- {
- if ( vorbis.loaded == 0 ) {
- vorbis.handle = SDL_LoadObject(OGG_DYNAMIC);
- if ( vorbis.handle == NULL ) {
- return -1;
- }
- vorbis.ov_clear =
- (int (*)(OggVorbis_File *))
- SDL_LoadFunction(vorbis.handle, "ov_clear");
- if ( vorbis.ov_clear == NULL ) {
- SDL_UnloadObject(vorbis.handle);
- return -1;
- }
- vorbis.ov_info =
- (vorbis_info *(*)(OggVorbis_File *,int))
- SDL_LoadFunction(vorbis.handle, "ov_info");
- if ( vorbis.ov_info == NULL ) {
- SDL_UnloadObject(vorbis.handle);
- return -1;
- }
- vorbis.ov_open_callbacks =
- (int (*)(void *, OggVorbis_File *, char *, long, ov_callbacks))
- SDL_LoadFunction(vorbis.handle, "ov_open_callbacks");
- if ( vorbis.ov_open_callbacks == NULL ) {
- SDL_UnloadObject(vorbis.handle);
- return -1;
- }
- vorbis.ov_pcm_total =
- (ogg_int64_t (*)(OggVorbis_File *,int))
- SDL_LoadFunction(vorbis.handle, "ov_pcm_total");
- if ( vorbis.ov_pcm_total == NULL ) {
- SDL_UnloadObject(vorbis.handle);
- return -1;
- }
- vorbis.ov_read =
- #ifdef OGG_USE_TREMOR
- (long (*)(OggVorbis_File *,char *,int,int *))
- #else
- (long (*)(OggVorbis_File *,char *,int,int,int,int,int *))
- #endif
- SDL_LoadFunction(vorbis.handle, "ov_read");
- if ( vorbis.ov_read == NULL ) {
- SDL_UnloadObject(vorbis.handle);
- return -1;
- }
- vorbis.ov_time_seek =
- (int (*)(OggVorbis_File *,double))
- SDL_LoadFunction(vorbis.handle, "ov_time_seek");
- if ( vorbis.ov_time_seek == NULL ) {
- SDL_UnloadObject(vorbis.handle);
- return -1;
- }
- }
- ++vorbis.loaded;
- return 0;
- }
- void Mix_QuitOgg()
- {
- if ( vorbis.loaded == 0 ) {
- return;
- }
- if ( vorbis.loaded == 1 ) {
- SDL_UnloadObject(vorbis.handle);
- }
- --vorbis.loaded;
- }
- #else
- int Mix_InitOgg()
- {
- if ( vorbis.loaded == 0 ) {
- vorbis.ov_clear = ov_clear;
- vorbis.ov_info = ov_info;
- vorbis.ov_open_callbacks = ov_open_callbacks;
- vorbis.ov_pcm_total = ov_pcm_total;
- vorbis.ov_read = ov_read;
- vorbis.ov_time_seek = ov_time_seek;
- }
- ++vorbis.loaded;
- return 0;
- }
- void Mix_QuitOgg()
- {
- if ( vorbis.loaded == 0 ) {
- return;
- }
- if ( vorbis.loaded == 1 ) {
- }
- --vorbis.loaded;
- }
- #endif /* OGG_DYNAMIC */
- #endif /* OGG_MUSIC */