dynamic_mp3.c
author Sam Lantinga <slouken@libsdl.org>
Sat, 01 Jun 2013 22:30:04 -0700
changeset 627 438fb12df34f
parent 625 1d489d8ec2e0
child 629 87c536d57d92
permissions -rw-r--r--
Updated iOS project to include OGG support directly
     1 /*
     2   SDL_mixer:  An audio mixer library based on the SDL library
     3   Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>
     4 
     5   This software is provided 'as-is', without any express or implied
     6   warranty.  In no event will the authors be held liable for any damages
     7   arising from the use of this software.
     8 
     9   Permission is granted to anyone to use this software for any purpose,
    10   including commercial applications, and to alter it and redistribute it
    11   freely, subject to the following restrictions:
    12 
    13   1. The origin of this software must not be misrepresented; you must not
    14      claim that you wrote the original software. If you use this software
    15      in a product, an acknowledgment in the product documentation would be
    16      appreciated but is not required.
    17   2. Altered source versions must be plainly marked as such, and must not be
    18      misrepresented as being the original software.
    19   3. This notice may not be removed or altered from any source distribution.
    20 */
    21 
    22 #ifdef MP3_MUSIC
    23 
    24 #include "SDL_loadso.h"
    25 
    26 #include "dynamic_mp3.h"
    27 
    28 smpeg_loader smpeg = {
    29     0, NULL
    30 };
    31 
    32 #ifdef MP3_DYNAMIC
    33 int Mix_InitMP3()
    34 {
    35     if ( smpeg.loaded == 0 ) {
    36         smpeg.handle = SDL_LoadObject(MP3_DYNAMIC);
    37         if ( smpeg.handle == NULL ) {
    38             return -1;
    39         }
    40         smpeg.SMPEG_actualSpec =
    41             (void (*)( SMPEG *, SDL_AudioSpec * ))
    42             SDL_LoadFunction(smpeg.handle, "SMPEG_actualSpec");
    43         if ( smpeg.SMPEG_actualSpec == NULL ) {
    44             SDL_UnloadObject(smpeg.handle);
    45             return -1;
    46         }
    47         smpeg.SMPEG_delete =
    48             (void (*)( SMPEG* ))
    49             SDL_LoadFunction(smpeg.handle, "SMPEG_delete");
    50         if ( smpeg.SMPEG_delete == NULL ) {
    51             SDL_UnloadObject(smpeg.handle);
    52             return -1;
    53         }
    54         smpeg.SMPEG_enableaudio =
    55             (void (*)( SMPEG*, int ))
    56             SDL_LoadFunction(smpeg.handle, "SMPEG_enableaudio");
    57         if ( smpeg.SMPEG_enableaudio == NULL ) {
    58             SDL_UnloadObject(smpeg.handle);
    59             return -1;
    60         }
    61         smpeg.SMPEG_enablevideo =
    62             (void (*)( SMPEG*, int ))
    63             SDL_LoadFunction(smpeg.handle, "SMPEG_enablevideo");
    64         if ( smpeg.SMPEG_enablevideo == NULL ) {
    65             SDL_UnloadObject(smpeg.handle);
    66             return -1;
    67         }
    68         smpeg.SMPEG_new_rwops =
    69             (SMPEG* (*)(SDL_RWops *, SMPEG_Info*, int, int))
    70             SDL_LoadFunction(smpeg.handle, "SMPEG_new_rwops");
    71         if ( smpeg.SMPEG_new_rwops == NULL ) {
    72             SDL_UnloadObject(smpeg.handle);
    73             return -1;
    74         }
    75         smpeg.SMPEG_play =
    76             (void (*)( SMPEG* ))
    77             SDL_LoadFunction(smpeg.handle, "SMPEG_play");
    78         if ( smpeg.SMPEG_play == NULL ) {
    79             SDL_UnloadObject(smpeg.handle);
    80             return -1;
    81         }
    82         smpeg.SMPEG_playAudio =
    83             (int (*)( SMPEG *, Uint8 *, int ))
    84             SDL_LoadFunction(smpeg.handle, "SMPEG_playAudio");
    85         if ( smpeg.SMPEG_playAudio == NULL ) {
    86             SDL_UnloadObject(smpeg.handle);
    87             return -1;
    88         }
    89         smpeg.SMPEG_rewind =
    90             (void (*)( SMPEG* ))
    91             SDL_LoadFunction(smpeg.handle, "SMPEG_rewind");
    92         if ( smpeg.SMPEG_rewind == NULL ) {
    93             SDL_UnloadObject(smpeg.handle);
    94             return -1;
    95         }
    96         smpeg.SMPEG_setvolume =
    97             (void (*)( SMPEG*, int ))
    98             SDL_LoadFunction(smpeg.handle, "SMPEG_setvolume");
    99         if ( smpeg.SMPEG_setvolume == NULL ) {
   100             SDL_UnloadObject(smpeg.handle);
   101             return -1;
   102         }
   103         smpeg.SMPEG_skip =
   104             (void (*)( SMPEG*, float ))
   105             SDL_LoadFunction(smpeg.handle, "SMPEG_skip");
   106         if ( smpeg.SMPEG_skip == NULL ) {
   107             SDL_UnloadObject(smpeg.handle);
   108             return -1;
   109         }
   110         smpeg.SMPEG_status =
   111             (SMPEGstatus (*)( SMPEG* ))
   112             SDL_LoadFunction(smpeg.handle, "SMPEG_status");
   113         if ( smpeg.SMPEG_status == NULL ) {
   114             SDL_UnloadObject(smpeg.handle);
   115             return -1;
   116         }
   117         smpeg.SMPEG_stop =
   118             (void (*)( SMPEG* ))
   119             SDL_LoadFunction(smpeg.handle, "SMPEG_stop");
   120         if ( smpeg.SMPEG_stop == NULL ) {
   121             SDL_UnloadObject(smpeg.handle);
   122             return -1;
   123         }
   124     }
   125     ++smpeg.loaded;
   126 
   127     return 0;
   128 }
   129 void Mix_QuitMP3()
   130 {
   131     if ( smpeg.loaded == 0 ) {
   132         return;
   133     }
   134     if ( smpeg.loaded == 1 ) {
   135         SDL_UnloadObject(smpeg.handle);
   136     }
   137     --smpeg.loaded;
   138 }
   139 #else
   140 int Mix_InitMP3()
   141 {
   142     if ( smpeg.loaded == 0 ) {
   143         smpeg.SMPEG_actualSpec = SMPEG_actualSpec;
   144         smpeg.SMPEG_delete = SMPEG_delete;
   145         smpeg.SMPEG_enableaudio = SMPEG_enableaudio;
   146         smpeg.SMPEG_enablevideo = SMPEG_enablevideo;
   147         smpeg.SMPEG_new_rwops = SMPEG_new_rwops;
   148         smpeg.SMPEG_play = SMPEG_play;
   149         smpeg.SMPEG_playAudio = SMPEG_playAudio;
   150         smpeg.SMPEG_rewind = SMPEG_rewind;
   151         smpeg.SMPEG_setvolume = SMPEG_setvolume;
   152         smpeg.SMPEG_skip = SMPEG_skip;
   153         smpeg.SMPEG_status = SMPEG_status;
   154         smpeg.SMPEG_stop = SMPEG_stop;
   155     }
   156     ++smpeg.loaded;
   157 
   158     return 0;
   159 }
   160 void Mix_QuitMP3()
   161 {
   162     if ( smpeg.loaded == 0 ) {
   163         return;
   164     }
   165     if ( smpeg.loaded == 1 ) {
   166     }
   167     --smpeg.loaded;
   168 }
   169 #endif /* MP3_DYNAMIC */
   170 
   171 #endif /* MP3_MUSIC */