dynamic_flac.c
author Sam Lantinga <slouken@libsdl.org>
Mon, 19 Oct 2009 01:03:40 +0000
changeset 462 028b317d01d2
parent 386 695494546b3c
child 470 5cebd6c5be2d
permissions -rw-r--r--
Added the AudioUnit framework for the native MIDI code.
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/*
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    SDL_mixer:  An audio mixer library based on the SDL library
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    Copyright (C) 1997-2009 Sam Lantinga
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    This library is free software; you can redistribute it and/or
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    modify it under the terms of the GNU Library General Public
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    License as published by the Free Software Foundation; either
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    version 2 of the License, or (at your option) any later version.
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    This library is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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    Library General Public License for more details.
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    You should have received a copy of the GNU Library General Public
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    License along with this library; if not, write to the Free
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    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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    Sam Lantinga
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    slouken@libsdl.org
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    Implementation of the dynamic loading functionality for libFLAC.
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    									~ Austen Dicken (admin@cvpcs.org)
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*/
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#ifdef FLAC_MUSIC
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#include "SDL_loadso.h"
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#include "dynamic_flac.h"
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flac_loader flac = {
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	0, NULL
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};
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#ifdef FLAC_DYNAMIC
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int Mix_InitFLAC() {
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	if ( flac.loaded == 0 ) {
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		flac.handle = SDL_LoadObject(FLAC_DYNAMIC);
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		if ( flac.handle == NULL ) {
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			return -1;
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		}
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		flac.FLAC__stream_decoder_new =
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			(FLAC__StreamDecoder *(*)())
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			SDL_LoadFunction(flac.handle, "FLAC__stream_decoder_new");
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		if ( flac.FLAC__stream_decoder_new == NULL ) {
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			SDL_UnloadObject(flac.handle);
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			return -1;
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		}
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		flac.FLAC__stream_decoder_delete =
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			(void (*)(FLAC__StreamDecoder *))
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			SDL_LoadFunction(flac.handle, "FLAC__stream_decoder_delete");
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		if ( flac.FLAC__stream_decoder_delete == NULL ) {
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			SDL_UnloadObject(flac.handle);
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			return -1;
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		}
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		flac.FLAC__stream_decoder_init_stream =
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			(FLAC__StreamDecoderInitStatus (*)(
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						FLAC__StreamDecoder *,
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						FLAC__StreamDecoderReadCallback,
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						FLAC__StreamDecoderSeekCallback,
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						FLAC__StreamDecoderTellCallback,
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						FLAC__StreamDecoderLengthCallback,
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						FLAC__StreamDecoderEofCallback,
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						FLAC__StreamDecoderWriteCallback,
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						FLAC__StreamDecoderMetadataCallback,
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						FLAC__StreamDecoderErrorCallback,
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						void *))
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			SDL_LoadFunction(flac.handle, "FLAC__stream_decoder_init_stream");
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		if ( flac.FLAC__stream_decoder_init_stream == NULL ) {
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			SDL_UnloadObject(flac.handle);
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			return -1;
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		}
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		flac.FLAC__stream_decoder_finish =
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			(FLAC__bool (*)(FLAC__StreamDecoder *))
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			SDL_LoadFunction(flac.handle, "FLAC__stream_decoder_finish");
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		if ( flac.FLAC__stream_decoder_finish == NULL ) {
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			SDL_UnloadObject(flac.handle);
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			return -1;
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		}
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		flac.FLAC__stream_decoder_flush =
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			(FLAC__bool (*)(FLAC__StreamDecoder *))
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			SDL_LoadFunction(flac.handle, "FLAC__stream_decoder_flush");
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		if ( flac.FLAC__stream_decoder_flush == NULL ) {
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			SDL_UnloadObject(flac.handle);
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			return -1;
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		}
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		flac.FLAC__stream_decoder_process_single =
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			(FLAC__bool (*)(FLAC__StreamDecoder *))
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			SDL_LoadFunction(flac.handle,
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						"FLAC__stream_decoder_process_single");
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		if ( flac.FLAC__stream_decoder_process_single == NULL ) {
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			SDL_UnloadObject(flac.handle);
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			return -1;
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		}
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		flac.FLAC__stream_decoder_process_until_end_of_metadata =
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			(FLAC__bool (*)(FLAC__StreamDecoder *))
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			SDL_LoadFunction(flac.handle,
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						"FLAC__stream_decoder_process_until_end_of_metadata");
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		if ( flac.FLAC__stream_decoder_process_until_end_of_metadata == NULL ) {
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			SDL_UnloadObject(flac.handle);
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			return -1;
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		}
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		flac.FLAC__stream_decoder_process_until_end_of_stream =
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			(FLAC__bool (*)(FLAC__StreamDecoder *))
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			SDL_LoadFunction(flac.handle,
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						"FLAC__stream_decoder_process_until_end_of_stream");
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		if ( flac.FLAC__stream_decoder_process_until_end_of_stream == NULL ) {
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			SDL_UnloadObject(flac.handle);
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			return -1;
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		}
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		flac.FLAC__stream_decoder_seek_absolute =
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			(FLAC__bool (*)(FLAC__StreamDecoder *, FLAC__uint64))
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			SDL_LoadFunction(flac.handle, "FLAC__stream_decoder_seek_absolute");
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		if ( flac.FLAC__stream_decoder_seek_absolute == NULL ) {
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			SDL_UnloadObject(flac.handle);
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			return -1;
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		}
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		flac.FLAC__stream_decoder_get_state =
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			(FLAC__StreamDecoderState (*)(const FLAC__StreamDecoder *decoder))
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			SDL_LoadFunction(flac.handle, "FLAC__stream_decoder_get_state");
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		if ( flac.FLAC__stream_decoder_get_state == NULL ) {
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			SDL_UnloadObject(flac.handle);
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			return -1;
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		}
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	}
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	++flac.loaded;
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	return 0;
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}
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void Mix_QuitFLAC() {
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	if ( flac.loaded == 0 ) {
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		return;
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	}
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	if ( flac.loaded == 1 ) {
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		SDL_UnloadObject(flac.handle);
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	}
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	--flac.loaded;
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}
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#else
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int Mix_InitFLAC() {
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	if ( flac.loaded == 0 ) {
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		flac.FLAC__stream_decoder_new = FLAC__stream_decoder_new;
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		flac.FLAC__stream_decoder_delete = FLAC__stream_decoder_delete;
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		flac.FLAC__stream_decoder_init_stream =
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							FLAC__stream_decoder_init_stream;
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		flac.FLAC__stream_decoder_finish = FLAC__stream_decoder_finish;
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		flac.FLAC__stream_decoder_flush = FLAC__stream_decoder_flush;
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		flac.FLAC__stream_decoder_process_single =
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							FLAC__stream_decoder_process_single;
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		flac.FLAC__stream_decoder_process_until_end_of_metadata =
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							FLAC__stream_decoder_process_until_end_of_metadata;
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		flac.FLAC__stream_decoder_process_until_end_of_stream =
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							FLAC__stream_decoder_process_until_end_of_stream;
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		flac.FLAC__stream_decoder_seek_absolute =
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							FLAC__stream_decoder_seek_absolute;
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		flac.FLAC__stream_decoder_get_state =
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							FLAC__stream_decoder_get_state;
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	}
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	++flac.loaded;
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	return 0;
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}
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void Mix_QuitFLAC() {
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	if ( flac.loaded == 0 ) {
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		return;
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	}
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	if ( flac.loaded == 1 ) {
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	}
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	--flac.loaded;
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}
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#endif // FLAC_DYNAMIC
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#endif // FLAC_MUSIC