dynamic_flac.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
- Implementation of the dynamic loading functionality for libFLAC.
- ~ Austen Dicken (admin@cvpcs.org)
- */
- #ifdef FLAC_MUSIC
- #include "SDL_loadso.h"
- #include "dynamic_flac.h"
- flac_loader flac = {
- 0, NULL
- };
- #ifdef FLAC_DYNAMIC
- int Mix_InitFLAC()
- {
- if ( flac.loaded == 0 ) {
- flac.handle = SDL_LoadObject(FLAC_DYNAMIC);
- if ( flac.handle == NULL ) {
- return -1;
- }
- flac.FLAC__stream_decoder_new =
- (FLAC__StreamDecoder *(*)())
- SDL_LoadFunction(flac.handle, "FLAC__stream_decoder_new");
- if ( flac.FLAC__stream_decoder_new == NULL ) {
- SDL_UnloadObject(flac.handle);
- return -1;
- }
- flac.FLAC__stream_decoder_delete =
- (void (*)(FLAC__StreamDecoder *))
- SDL_LoadFunction(flac.handle, "FLAC__stream_decoder_delete");
- if ( flac.FLAC__stream_decoder_delete == NULL ) {
- SDL_UnloadObject(flac.handle);
- return -1;
- }
- flac.FLAC__stream_decoder_init_stream =
- (FLAC__StreamDecoderInitStatus (*)(
- FLAC__StreamDecoder *,
- FLAC__StreamDecoderReadCallback,
- FLAC__StreamDecoderSeekCallback,
- FLAC__StreamDecoderTellCallback,
- FLAC__StreamDecoderLengthCallback,
- FLAC__StreamDecoderEofCallback,
- FLAC__StreamDecoderWriteCallback,
- FLAC__StreamDecoderMetadataCallback,
- FLAC__StreamDecoderErrorCallback,
- void *))
- SDL_LoadFunction(flac.handle, "FLAC__stream_decoder_init_stream");
- if ( flac.FLAC__stream_decoder_init_stream == NULL ) {
- SDL_UnloadObject(flac.handle);
- return -1;
- }
- flac.FLAC__stream_decoder_finish =
- (FLAC__bool (*)(FLAC__StreamDecoder *))
- SDL_LoadFunction(flac.handle, "FLAC__stream_decoder_finish");
- if ( flac.FLAC__stream_decoder_finish == NULL ) {
- SDL_UnloadObject(flac.handle);
- return -1;
- }
- flac.FLAC__stream_decoder_flush =
- (FLAC__bool (*)(FLAC__StreamDecoder *))
- SDL_LoadFunction(flac.handle, "FLAC__stream_decoder_flush");
- if ( flac.FLAC__stream_decoder_flush == NULL ) {
- SDL_UnloadObject(flac.handle);
- return -1;
- }
- flac.FLAC__stream_decoder_process_single =
- (FLAC__bool (*)(FLAC__StreamDecoder *))
- SDL_LoadFunction(flac.handle,
- "FLAC__stream_decoder_process_single");
- if ( flac.FLAC__stream_decoder_process_single == NULL ) {
- SDL_UnloadObject(flac.handle);
- return -1;
- }
- flac.FLAC__stream_decoder_process_until_end_of_metadata =
- (FLAC__bool (*)(FLAC__StreamDecoder *))
- SDL_LoadFunction(flac.handle,
- "FLAC__stream_decoder_process_until_end_of_metadata");
- if ( flac.FLAC__stream_decoder_process_until_end_of_metadata == NULL ) {
- SDL_UnloadObject(flac.handle);
- return -1;
- }
- flac.FLAC__stream_decoder_process_until_end_of_stream =
- (FLAC__bool (*)(FLAC__StreamDecoder *))
- SDL_LoadFunction(flac.handle,
- "FLAC__stream_decoder_process_until_end_of_stream");
- if ( flac.FLAC__stream_decoder_process_until_end_of_stream == NULL ) {
- SDL_UnloadObject(flac.handle);
- return -1;
- }
- flac.FLAC__stream_decoder_seek_absolute =
- (FLAC__bool (*)(FLAC__StreamDecoder *, FLAC__uint64))
- SDL_LoadFunction(flac.handle, "FLAC__stream_decoder_seek_absolute");
- if ( flac.FLAC__stream_decoder_seek_absolute == NULL ) {
- SDL_UnloadObject(flac.handle);
- return -1;
- }
- flac.FLAC__stream_decoder_get_state =
- (FLAC__StreamDecoderState (*)(const FLAC__StreamDecoder *decoder))
- SDL_LoadFunction(flac.handle, "FLAC__stream_decoder_get_state");
- if ( flac.FLAC__stream_decoder_get_state == NULL ) {
- SDL_UnloadObject(flac.handle);
- return -1;
- }
- }
- ++flac.loaded;
- return 0;
- }
- void Mix_QuitFLAC()
- {
- if ( flac.loaded == 0 ) {
- return;
- }
- if ( flac.loaded == 1 ) {
- SDL_UnloadObject(flac.handle);
- }
- --flac.loaded;
- }
- #else
- int Mix_InitFLAC()
- {
- if ( flac.loaded == 0 ) {
- flac.FLAC__stream_decoder_new = FLAC__stream_decoder_new;
- flac.FLAC__stream_decoder_delete = FLAC__stream_decoder_delete;
- flac.FLAC__stream_decoder_init_stream =
- FLAC__stream_decoder_init_stream;
- flac.FLAC__stream_decoder_finish = FLAC__stream_decoder_finish;
- flac.FLAC__stream_decoder_flush = FLAC__stream_decoder_flush;
- flac.FLAC__stream_decoder_process_single =
- FLAC__stream_decoder_process_single;
- flac.FLAC__stream_decoder_process_until_end_of_metadata =
- FLAC__stream_decoder_process_until_end_of_metadata;
- flac.FLAC__stream_decoder_process_until_end_of_stream =
- FLAC__stream_decoder_process_until_end_of_stream;
- flac.FLAC__stream_decoder_seek_absolute =
- FLAC__stream_decoder_seek_absolute;
- flac.FLAC__stream_decoder_get_state =
- FLAC__stream_decoder_get_state;
- }
- ++flac.loaded;
- return 0;
- }
- void Mix_QuitFLAC()
- {
- if ( flac.loaded == 0 ) {
- return;
- }
- if ( flac.loaded == 1 ) {
- }
- --flac.loaded;
- }
- #endif /* FLAC_DYNAMIC */
- #endif /* FLAC_MUSIC */