dynamic_mp3.c
上传用户:nini_0081
上传日期:2022-07-21
资源大小:2628k
文件大小:5k
- /*
- 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 MP3_MUSIC
- #include "SDL_loadso.h"
- #include "dynamic_mp3.h"
- smpeg_loader smpeg = {
- 0, NULL
- };
- #ifdef MP3_DYNAMIC
- int Mix_InitMP3()
- {
- if ( smpeg.loaded == 0 ) {
- smpeg.handle = SDL_LoadObject(MP3_DYNAMIC);
- if ( smpeg.handle == NULL ) {
- return -1;
- }
- smpeg.SMPEG_actualSpec =
- (void (*)( SMPEG *, SDL_AudioSpec * ))
- SDL_LoadFunction(smpeg.handle, "SMPEG_actualSpec");
- if ( smpeg.SMPEG_actualSpec == NULL ) {
- SDL_UnloadObject(smpeg.handle);
- return -1;
- }
- smpeg.SMPEG_delete =
- (void (*)( SMPEG* ))
- SDL_LoadFunction(smpeg.handle, "SMPEG_delete");
- if ( smpeg.SMPEG_delete == NULL ) {
- SDL_UnloadObject(smpeg.handle);
- return -1;
- }
- smpeg.SMPEG_enableaudio =
- (void (*)( SMPEG*, int ))
- SDL_LoadFunction(smpeg.handle, "SMPEG_enableaudio");
- if ( smpeg.SMPEG_enableaudio == NULL ) {
- SDL_UnloadObject(smpeg.handle);
- return -1;
- }
- smpeg.SMPEG_enablevideo =
- (void (*)( SMPEG*, int ))
- SDL_LoadFunction(smpeg.handle, "SMPEG_enablevideo");
- if ( smpeg.SMPEG_enablevideo == NULL ) {
- SDL_UnloadObject(smpeg.handle);
- return -1;
- }
- smpeg.SMPEG_new =
- (SMPEG* (*)(const char *, SMPEG_Info*, int))
- SDL_LoadFunction(smpeg.handle, "SMPEG_new");
- if ( smpeg.SMPEG_new == NULL ) {
- SDL_UnloadObject(smpeg.handle);
- return -1;
- }
- smpeg.SMPEG_new_rwops =
- (SMPEG* (*)(SDL_RWops *, SMPEG_Info*, int))
- SDL_LoadFunction(smpeg.handle, "SMPEG_new_rwops");
- if ( smpeg.SMPEG_new_rwops == NULL ) {
- SDL_UnloadObject(smpeg.handle);
- return -1;
- }
- smpeg.SMPEG_play =
- (void (*)( SMPEG* ))
- SDL_LoadFunction(smpeg.handle, "SMPEG_play");
- if ( smpeg.SMPEG_play == NULL ) {
- SDL_UnloadObject(smpeg.handle);
- return -1;
- }
- smpeg.SMPEG_playAudio =
- (int (*)( SMPEG *, Uint8 *, int ))
- SDL_LoadFunction(smpeg.handle, "SMPEG_playAudio");
- if ( smpeg.SMPEG_playAudio == NULL ) {
- SDL_UnloadObject(smpeg.handle);
- return -1;
- }
- smpeg.SMPEG_rewind =
- (void (*)( SMPEG* ))
- SDL_LoadFunction(smpeg.handle, "SMPEG_rewind");
- if ( smpeg.SMPEG_rewind == NULL ) {
- SDL_UnloadObject(smpeg.handle);
- return -1;
- }
- smpeg.SMPEG_setvolume =
- (void (*)( SMPEG*, int ))
- SDL_LoadFunction(smpeg.handle, "SMPEG_setvolume");
- if ( smpeg.SMPEG_setvolume == NULL ) {
- SDL_UnloadObject(smpeg.handle);
- return -1;
- }
- smpeg.SMPEG_skip =
- (void (*)( SMPEG*, float ))
- SDL_LoadFunction(smpeg.handle, "SMPEG_skip");
- if ( smpeg.SMPEG_skip == NULL ) {
- SDL_UnloadObject(smpeg.handle);
- return -1;
- }
- smpeg.SMPEG_status =
- (SMPEGstatus (*)( SMPEG* ))
- SDL_LoadFunction(smpeg.handle, "SMPEG_status");
- if ( smpeg.SMPEG_status == NULL ) {
- SDL_UnloadObject(smpeg.handle);
- return -1;
- }
- smpeg.SMPEG_stop =
- (void (*)( SMPEG* ))
- SDL_LoadFunction(smpeg.handle, "SMPEG_stop");
- if ( smpeg.SMPEG_stop == NULL ) {
- SDL_UnloadObject(smpeg.handle);
- return -1;
- }
- }
- ++smpeg.loaded;
- return 0;
- }
- void Mix_QuitMP3()
- {
- if ( smpeg.loaded == 0 ) {
- return;
- }
- if ( smpeg.loaded == 1 ) {
- SDL_UnloadObject(smpeg.handle);
- }
- --smpeg.loaded;
- }
- #else
- int Mix_InitMP3()
- {
- if ( smpeg.loaded == 0 ) {
- smpeg.SMPEG_actualSpec = SMPEG_actualSpec;
- smpeg.SMPEG_delete = SMPEG_delete;
- smpeg.SMPEG_enableaudio = SMPEG_enableaudio;
- smpeg.SMPEG_enablevideo = SMPEG_enablevideo;
- smpeg.SMPEG_new = SMPEG_new;
- smpeg.SMPEG_new_rwops = SMPEG_new_rwops;
- smpeg.SMPEG_play = SMPEG_play;
- smpeg.SMPEG_playAudio = SMPEG_playAudio;
- smpeg.SMPEG_rewind = SMPEG_rewind;
- smpeg.SMPEG_setvolume = SMPEG_setvolume;
- smpeg.SMPEG_skip = SMPEG_skip;
- smpeg.SMPEG_status = SMPEG_status;
- smpeg.SMPEG_stop = SMPEG_stop;
- }
- ++smpeg.loaded;
- return 0;
- }
- void Mix_QuitMP3()
- {
- if ( smpeg.loaded == 0 ) {
- return;
- }
- if ( smpeg.loaded == 1 ) {
- }
- --smpeg.loaded;
- }
- #endif /* MP3_DYNAMIC */
- #endif /* MP3_MUSIC */