/*

SDL_mixer: An audio mixer library based on the SDL library

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.

*/

#ifdef MUSIC_MOD_MODPLUG

#include "SDL_loadso.h"

#include "music_modplug.h"

#ifdef MODPLUG_HEADER

#include MODPLUG_HEADER

#else

#include <libmodplug/modplug.h>

#endif

typedef struct {

int loaded;

void *handle;

ModPlugFile* (*ModPlug_Load)(const void* data, int size);

void (*ModPlug_Unload)(ModPlugFile* file);

int (*ModPlug_Read)(ModPlugFile* file, void* buffer, int size);

void (*ModPlug_Seek)(ModPlugFile* file, int millisecond);

void (*ModPlug_GetSettings)(ModPlug_Settings* settings);

void (*ModPlug_SetSettings)(const ModPlug_Settings* settings);

void (*ModPlug_SetMasterVolume)(ModPlugFile* file,unsigned int cvol) ;

} modplug_loader;

static modplug_loader modplug = {

0, NULL

};

static ModPlug_Settings settings;

#define FUNCTION_LOADER(FUNC, SIG) \

modplug.FUNC = (SIG) SDL_LoadFunction(modplug.handle, #FUNC); \

if (modplug.FUNC == NULL) { SDL_UnloadObject(modplug.handle); return -1; }

#else

#define FUNCTION_LOADER(FUNC, SIG) \

modplug.FUNC = FUNC;

#endif

static int MODPLUG_Load(void)

{

if (modplug.loaded == 0) {

modplug.handle = SDL_LoadObject(MODPLUG_DYNAMIC);

if (modplug.handle == NULL) {

return -1;

}

extern ModPlugFile* ModPlug_Load(const void* data, int size) __attribute__((weak_import));

if (ModPlug_Load == NULL)

{

/* Missing weakly linked framework */

Mix_SetError("Missing modplug.framework");

return -1;

}

#endif

FUNCTION_LOADER(ModPlug_Load, ModPlugFile* (*)(const void* data, int size))

FUNCTION_LOADER(ModPlug_Unload, void (*)(ModPlugFile* file))

FUNCTION_LOADER(ModPlug_Read, int (*)(ModPlugFile* file, void* buffer, int size))

FUNCTION_LOADER(ModPlug_Seek, void (*)(ModPlugFile* file, int millisecond))

FUNCTION_LOADER(ModPlug_GetSettings, void (*)(ModPlug_Settings* settings))

FUNCTION_LOADER(ModPlug_SetSettings, void (*)(const ModPlug_Settings* settings))

FUNCTION_LOADER(ModPlug_SetMasterVolume, void (*)(ModPlugFile* file,unsigned int cvol))

}

++modplug.loaded;

return 0;

}

static void MODPLUG_Unload(void)

if (modplug.loaded == 0) {

return;

#ifdef MODPLUG_DYNAMIC

SDL_UnloadObject(modplug.handle);

#endif

}

--modplug.loaded;

}

int play_count;

ModPlugFile *file;

SDL_AudioStream *stream;

void *buffer;

int buffer_size;

} MODPLUG_Music;

static int MODPLUG_Seek(void *context, double position);

static void MODPLUG_Delete(void *context);

static int MODPLUG_Open(const SDL_AudioSpec *spec)

{

/* ModPlug supports U8 or S16 audio output */

modplug.ModPlug_GetSettings(&settings);

settings.mFlags = MODPLUG_ENABLE_OVERSAMPLING;

if (spec->channels == 1) {

settings.mChannels = 1;

} else {

settings.mChannels = 2;

if (SDL_AUDIO_BITSIZE(spec->format) == 8) {

settings.mBits = 8;

} else {

settings.mBits = 16;

}

if (spec->freq >= 44100) {

settings.mFrequency = 44100;

} else if (spec->freq >= 22050) {

settings.mFrequency = 22050;

} else {

settings.mFrequency = 11025;

}

settings.mResamplingMode = MODPLUG_RESAMPLE_FIR;

settings.mReverbDepth = 0;

settings.mReverbDelay = 100;

settings.mBassAmount = 0;

settings.mBassRange = 50;

settings.mSurroundDepth = 0;

settings.mSurroundDelay = 10;

settings.mLoopCount = 0;

}

/* Load a modplug stream from an SDL_RWops object */

MODPLUG_Music *music;

void *buffer;

size_t size;

music = (MODPLUG_Music *)SDL_calloc(1, sizeof(*music));

if (!music) {

return NULL;

}

music->stream = SDL_NewAudioStream((settings.mBits == 8) ? AUDIO_U8 : AUDIO_S16SYS, settings.mChannels, settings.mFrequency,

music_spec.format, music_spec.channels, music_spec.freq);

if (!music->stream) {

MODPLUG_Delete(music);

return NULL;

}

music->buffer_size = music_spec.samples * (settings.mBits / 8) * settings.mChannels;

music->buffer = SDL_malloc(music->buffer_size);

if (!music->buffer) {

MODPLUG_Delete(music);

return NULL;

buffer = SDL_LoadFile_RW(src, &size, SDL_FALSE);

if (buffer) {

music->file = modplug.ModPlug_Load(buffer, (int)size);

if (!music->file) {

Mix_SetError("ModPlug_Load failed");

}

SDL_free(buffer);

}

if (!music->file) {

MODPLUG_Delete(music);

return NULL;

}

if (freesrc) {

}

return music;

}

/* Set the volume for a modplug stream */

static void MODPLUG_SetVolume(void *context, int volume)

MODPLUG_Music *music = (MODPLUG_Music *)context;

modplug.ModPlug_SetMasterVolume(music->file, volume*4);

}

MODPLUG_Music *music = (MODPLUG_Music *)context;

music->play_count = play_count;

return MODPLUG_Seek(music, 0.0);

}

/* Play some of a stream previously started with modplug_play() */

MODPLUG_Music *music = (MODPLUG_Music *)context;

int filled, amount;

filled = SDL_AudioStreamGet(music->stream, data, bytes);

if (filled != 0) {

return filled;

}

if (!music->play_count) {

/* All done */

*done = SDL_TRUE;

return 0;

}

amount = modplug.ModPlug_Read(music->file, music->buffer, music->buffer_size);

if (amount > 0) {

if (SDL_AudioStreamPut(music->stream, music->buffer, amount) < 0) {

return -1;

} else {

if (music->play_count == 1) {

music->play_count = 0;

SDL_AudioStreamFlush(music->stream);

} else {

int play_count = -1;

if (music->play_count > 0) {

play_count = (music->play_count - 1);

}

if (MODPLUG_Play(music, play_count) < 0) {

return -1;

}

}

}

return 0;

}

static int MODPLUG_GetAudio(void *context, void *data, int bytes)

{

return music_pcm_getaudio(context, data, bytes, MIX_MAX_VOLUME, MODPLUG_GetSome);

}

/* Jump (seek) to a given position */

static int MODPLUG_Seek(void *context, double position)

MODPLUG_Music *music = (MODPLUG_Music *)context;

modplug.ModPlug_Seek(music->file, (int)(position*1000));

}

/* Close the given modplug stream */

MODPLUG_Music *music = (MODPLUG_Music *)context;

if (music->file) {

modplug.ModPlug_Unload(music->file);

}

if (music->stream) {

SDL_FreeAudioStream(music->stream);

}

if (music->buffer) {

SDL_free(music->buffer);

}

SDL_free(music);

}

"MODPLUG",

MIX_MUSIC_MODPLUG,

MUS_MOD,

SDL_FALSE,

SDL_FALSE,

MODPLUG_Load,

MODPLUG_Open,

MODPLUG_CreateFromRW,

NULL, /* CreateFromFile */

MODPLUG_SetVolume,

MODPLUG_Play,

NULL, /* IsPlaying */

MODPLUG_GetAudio,

MODPLUG_Seek,

NULL, /* Pause */

NULL, /* Resume */

NULL, /* Stop */

MODPLUG_Delete,

NULL, /* Close */

MODPLUG_Unload,

};

#endif /* MUSIC_MOD_MODPLUG */