/*

SDL_mixer: An audio mixer library based on the SDL library

Copyright (C) 1997-2017 Sam Lantinga <slouken@libsdl.org>

This software is provided 'as-is', without any express or implied

warranty. In no event will the authors be held liable for any damages

arising from the use of this software.

Permission is granted to anyone to use this software for any purpose,

including commercial applications, and to alter it and redistribute it

freely, subject to the following restrictions:

1. The origin of this software must not be misrepresented; you must not

claim that you wrote the original software. If you use this software

in a product, an acknowledgment in the product documentation would be

appreciated but is not required.

2. Altered source versions must be plainly marked as such, and must not be

misrepresented as being the original software.

3. This notice may not be removed or altered from any source distribution.

Implementation of the dynamic loading functionality for libFLAC.

~ Austen Dicken (admin@cvpcs.org)

*/

#ifdef FLAC_MUSIC

#include "SDL_loadso.h"

#include "SDL_mixer.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 ) {

#ifdef __MACOSX__

extern FLAC__StreamDecoder *FLAC__stream_decoder_new(void) __attribute__((weak_import));

if ( FLAC__stream_decoder_new == NULL )

{

/* Missing weakly linked framework */

Mix_SetError("Missing FLAC.framework");

return -1;

}

#endif // __MACOSX__

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 */