dynamic_ogg.c
author Ozkan Sezer <sezeroz@gmail.com>
Thu, 11 Oct 2018 11:50:10 +0300
branchSDL-1.2
changeset 902 6c862e733898
parent 894 77d5b8c518e7
permissions -rw-r--r--
remove smpeg support completely and backport libmpg123 support instead.
     1 /*
     2   SDL_mixer:  An audio mixer library based on the SDL library
     3   Copyright (C) 1997-2012 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 OGG_MUSIC
    23 
    24 #include "SDL_loadso.h"
    25 
    26 #include "dynamic_ogg.h"
    27 
    28 vorbis_loader vorbis = {
    29 	0, NULL
    30 };
    31 
    32 #ifdef OGG_DYNAMIC
    33 int Mix_InitOgg()
    34 {
    35 	if ( vorbis.loaded == 0 ) {
    36 		vorbis.handle = SDL_LoadObject(OGG_DYNAMIC);
    37 		if ( vorbis.handle == NULL ) {
    38 			return -1;
    39 		}
    40 		vorbis.ov_clear =
    41 			(int (*)(OggVorbis_File *))
    42 			SDL_LoadFunction(vorbis.handle, "ov_clear");
    43 		if ( vorbis.ov_clear == NULL ) {
    44 			SDL_UnloadObject(vorbis.handle);
    45 			return -1;
    46 		}
    47 		vorbis.ov_info =
    48 			(vorbis_info *(*)(OggVorbis_File *,int))
    49 			SDL_LoadFunction(vorbis.handle, "ov_info");
    50 		if ( vorbis.ov_info == NULL ) {
    51 			SDL_UnloadObject(vorbis.handle);
    52 			return -1;
    53 		}
    54 		vorbis.ov_open_callbacks =
    55 			(int (*)(void *, OggVorbis_File *, const char *, long, ov_callbacks))
    56 			SDL_LoadFunction(vorbis.handle, "ov_open_callbacks");
    57 		if ( vorbis.ov_open_callbacks == NULL ) {
    58 			SDL_UnloadObject(vorbis.handle);
    59 			return -1;
    60 		}
    61 		vorbis.ov_pcm_total =
    62 			(ogg_int64_t (*)(OggVorbis_File *,int))
    63 			SDL_LoadFunction(vorbis.handle, "ov_pcm_total");
    64 		if ( vorbis.ov_pcm_total == NULL ) {
    65 			SDL_UnloadObject(vorbis.handle);
    66 			return -1;
    67 		}
    68 		vorbis.ov_read =
    69 #ifdef OGG_USE_TREMOR
    70 			(long (*)(OggVorbis_File *,char *,int,int *))
    71 #else
    72 			(long (*)(OggVorbis_File *,char *,int,int,int,int,int *))
    73 #endif
    74 			SDL_LoadFunction(vorbis.handle, "ov_read");
    75 		if ( vorbis.ov_read == NULL ) {
    76 			SDL_UnloadObject(vorbis.handle);
    77 			return -1;
    78 		}
    79 		vorbis.ov_time_seek =
    80 #ifdef OGG_USE_TREMOR
    81 			(long (*)(OggVorbis_File *,ogg_int64_t))
    82 #else
    83 			(int (*)(OggVorbis_File *,double))
    84 #endif
    85 			SDL_LoadFunction(vorbis.handle, "ov_time_seek");
    86 		if ( vorbis.ov_time_seek == NULL ) {
    87 			SDL_UnloadObject(vorbis.handle);
    88 			return -1;
    89 		}
    90 	}
    91 	++vorbis.loaded;
    92 
    93 	return 0;
    94 }
    95 void Mix_QuitOgg()
    96 {
    97 	if ( vorbis.loaded == 0 ) {
    98 		return;
    99 	}
   100 	if ( vorbis.loaded == 1 ) {
   101 		SDL_UnloadObject(vorbis.handle);
   102 	}
   103 	--vorbis.loaded;
   104 }
   105 #else
   106 int Mix_InitOgg()
   107 {
   108 	if ( vorbis.loaded == 0 ) {
   109 		vorbis.ov_clear = ov_clear;
   110 		vorbis.ov_info = ov_info;
   111 		vorbis.ov_open_callbacks = ov_open_callbacks;
   112 		vorbis.ov_pcm_total = ov_pcm_total;
   113 		vorbis.ov_read = ov_read;
   114 		vorbis.ov_time_seek = ov_time_seek;
   115 	}
   116 	++vorbis.loaded;
   117 
   118 	return 0;
   119 }
   120 void Mix_QuitOgg()
   121 {
   122 	if ( vorbis.loaded == 0 ) {
   123 		return;
   124 	}
   125 	if ( vorbis.loaded == 1 ) {
   126 	}
   127 	--vorbis.loaded;
   128 }
   129 #endif /* OGG_DYNAMIC */
   130 
   131 #endif /* OGG_MUSIC */