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dynamic_mp3.c
180 lines (168 loc) · 4.59 KB
/
dynamic_mp3.c
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/*
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 */