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modplug.c
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modplug.c
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/*
* SDL_sound -- An abstract sound format decoding API.
* Copyright (C) 2001 Ryan C. Gordon.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* Module player for SDL_sound. This driver handles anything that ModPlug does.
*
* ModPlug can be found at http://sourceforge.net/projects/modplug-xmms
*
* An unofficial version of modplug with all C++ dependencies removed is also
* available: http://freecraft.net/snapshots/
* (Look for something like "libmodplug-johns-*.tar.gz")
*
* Please see the file LICENSE.txt in the source's root directory.
*
* This file written by Torbjörn Andersson (d91tan@Update.UU.SE)
*/
#if HAVE_CONFIG_H
# include <config.h>
#endif
#ifdef SOUND_SUPPORTS_MODPLUG
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "SDL_sound.h"
#define __SDL_SOUND_INTERNAL__
#include "SDL_sound_internal.h"
#if SOUND_MODPLUG_IN_OWN_PATH
#include "libmodplug/modplug.h"
#else
#include "modplug.h"
#endif
static int MODPLUG_init(void);
static void MODPLUG_quit(void);
static int MODPLUG_open(Sound_Sample *sample, const char *ext);
static void MODPLUG_close(Sound_Sample *sample);
static Uint32 MODPLUG_read(Sound_Sample *sample);
static int MODPLUG_rewind(Sound_Sample *sample);
static int MODPLUG_seek(Sound_Sample *sample, Uint32 ms);
static const char *extensions_modplug[] =
{
/* The XMMS plugin is apparently able to load compressed modules as
* well, but libmodplug does not handle this.
*/
"669", /* Composer 669 / UNIS 669 module */
"AMF", /* ASYLUM Music Format / Advanced Music Format(DSM) */
"AMS", /* AMS module */
"DBM", /* DigiBooster Pro Module */
"DMF", /* DMF DELUSION DIGITAL MUSIC FILEFORMAT (X-Tracker) */
"DSM", /* DSIK Internal Format module */
"FAR", /* Farandole module */
"IT", /* Impulse Tracker IT file */
"MDL", /* DigiTracker module */
#if 0
"J2B", /* Not implemented? What is it anyway? */
#endif
"MED", /* OctaMed MED file */
"MOD", /* ProTracker / NoiseTracker MOD/NST file */
"MT2", /* MadTracker 2.0 */
"MTM", /* MTM file */
"OKT", /* Oktalyzer module */
"PTM", /* PTM PolyTracker module */
"PSM", /* PSM module */
"S3M", /* ScreamTracker file */
"STM", /* ST 2.xx */
"ULT",
"UMX",
"XM", /* FastTracker II */
NULL
};
const Sound_DecoderFunctions __Sound_DecoderFunctions_MODPLUG =
{
{
extensions_modplug,
"Play modules through ModPlug",
"Torbjörn Andersson <d91tan@Update.UU.SE>",
"http://modplug-xmms.sourceforge.net/"
},
MODPLUG_init, /* init() method */
MODPLUG_quit, /* quit() method */
MODPLUG_open, /* open() method */
MODPLUG_close, /* close() method */
MODPLUG_read, /* read() method */
MODPLUG_rewind, /* rewind() method */
MODPLUG_seek /* seek() method */
};
static ModPlug_Settings settings;
static Sound_AudioInfo current_audioinfo;
static unsigned int total_mods_decoding = 0;
static SDL_mutex *modplug_mutex = NULL;
static int MODPLUG_init(void)
{
assert(modplug_mutex == NULL);
/*
* The settings will require some experimenting. I've borrowed some
* of them from the XMMS ModPlug plugin.
*/
settings.mFlags = MODPLUG_ENABLE_OVERSAMPLING;
#ifndef _WIN32_WCE
settings.mFlags |= MODPLUG_ENABLE_NOISE_REDUCTION |
MODPLUG_ENABLE_MEGABASS |
MODPLUG_ENABLE_SURROUND;
settings.mReverbDepth = 30;
settings.mReverbDelay = 100;
settings.mBassAmount = 40;
settings.mBassRange = 30;
settings.mSurroundDepth = 20;
settings.mSurroundDelay = 20;
#endif
settings.mChannels = 2;
settings.mBits = 16;
settings.mFrequency = 44100;
settings.mResamplingMode = MODPLUG_RESAMPLE_FIR;
settings.mLoopCount = 0;
current_audioinfo.channels = 2;
current_audioinfo.rate = 44100;
current_audioinfo.format = AUDIO_S16SYS;
total_mods_decoding = 0;
modplug_mutex = SDL_CreateMutex();
ModPlug_SetSettings(&settings);
return(1); /* success. */
} /* MODPLUG_init */
static void MODPLUG_quit(void)
{
assert(total_mods_decoding == 0);
if (modplug_mutex != NULL)
{
SDL_DestroyMutex(modplug_mutex);
modplug_mutex = NULL;
} /* if */
} /* MODPLUG_quit */
/*
* Most MOD files I've seen have tended to be a few hundred KB, even if some
* of them were much smaller than that.
*/
#define CHUNK_SIZE 65536
static int MODPLUG_open(Sound_Sample *sample, const char *ext)
{
Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
ModPlugFile *module;
Uint8 *data;
size_t size;
Uint32 retval;
int has_extension = 0;
int i;
/*
* Apparently ModPlug's loaders are too forgiving. They gladly accept
* streams that they shouldn't. For now, rely on file extension instead.
*/
for (i = 0; extensions_modplug[i] != NULL; i++)
{
if (__Sound_strcasecmp(ext, extensions_modplug[i]) == 0)
{
has_extension = 1;
break;
} /* if */
} /* for */
if (!has_extension)
{
SNDDBG(("MODPLUG: Unrecognized file type: %s\n", ext));
BAIL_MACRO("MODPLUG: Not a module file.", 0);
} /* if */
/*
* ModPlug needs the entire stream in one big chunk. I don't like it,
* but I don't think there's any way around it.
*/
data = (Uint8 *) malloc(CHUNK_SIZE);
BAIL_IF_MACRO(data == NULL, ERR_OUT_OF_MEMORY, 0);
size = 0;
do
{
retval = SDL_RWread(internal->rw, &data[size], 1, CHUNK_SIZE);
size += retval;
if (retval == CHUNK_SIZE)
{
data = (Uint8 *) realloc(data, size + CHUNK_SIZE);
BAIL_IF_MACRO(data == NULL, ERR_OUT_OF_MEMORY, 0);
} /* if */
} while (retval > 0);
/*
* It's only safe to change these settings when there're
* no other mods being decoded...
*/
if (modplug_mutex != NULL)
SDL_LockMutex(modplug_mutex);
if (total_mods_decoding > 0)
{
/* other mods decoding: use the same settings they are. */
memcpy(&sample->actual, ¤t_audioinfo, sizeof (Sound_AudioInfo));
} /* if */
else
{
/* no other mods decoding: define the new ModPlug output settings. */
memcpy(&sample->actual, &sample->desired, sizeof (Sound_AudioInfo));
if (sample->actual.rate == 0)
sample->actual.rate = 44100;
if (sample->actual.channels == 0)
sample->actual.channels = 2;
if (sample->actual.format == 0)
sample->actual.format = AUDIO_S16SYS;
memcpy(¤t_audioinfo, &sample->actual, sizeof (Sound_AudioInfo));
settings.mChannels=sample->actual.channels;
settings.mFrequency=sample->actual.rate;
settings.mBits = sample->actual.format & 0xFF;
ModPlug_SetSettings(&settings);
} /* else */
/*
* The buffer may be a bit too large, but that doesn't matter. I think
* it's safe to free it as soon as ModPlug_Load() is finished anyway.
*/
module = ModPlug_Load((void *) data, size);
free(data);
if (module == NULL)
{
if (modplug_mutex != NULL)
SDL_UnlockMutex(modplug_mutex);
BAIL_MACRO("MODPLUG: Not a module file.", 0);
} /* if */
total_mods_decoding++;
if (modplug_mutex != NULL)
SDL_UnlockMutex(modplug_mutex);
internal->total_time = ModPlug_GetLength(module);
SNDDBG(("MODPLUG: [%d ms] %s\n",
ModPlug_GetLength(module), ModPlug_GetName(module)));
internal->decoder_private = (void *) module;
sample->flags = SOUND_SAMPLEFLAG_CANSEEK;
SNDDBG(("MODPLUG: Accepting data stream\n"));
return(1); /* we'll handle this data. */
} /* MODPLUG_open */
static void MODPLUG_close(Sound_Sample *sample)
{
Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
ModPlugFile *module = (ModPlugFile *) internal->decoder_private;
if (modplug_mutex != NULL)
SDL_LockMutex(modplug_mutex);
total_mods_decoding--;
if (modplug_mutex != NULL)
SDL_UnlockMutex(modplug_mutex);
ModPlug_Unload(module);
} /* MODPLUG_close */
static Uint32 MODPLUG_read(Sound_Sample *sample)
{
Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
ModPlugFile *module = (ModPlugFile *) internal->decoder_private;
int retval;
retval = ModPlug_Read(module, internal->buffer, internal->buffer_size);
if (retval == 0)
sample->flags |= SOUND_SAMPLEFLAG_EOF;
return(retval);
} /* MODPLUG_read */
static int MODPLUG_rewind(Sound_Sample *sample)
{
Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
ModPlugFile *module = (ModPlugFile *) internal->decoder_private;
ModPlug_Seek(module, 0);
return(1);
} /* MODPLUG_rewind */
static int MODPLUG_seek(Sound_Sample *sample, Uint32 ms)
{
Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
ModPlugFile *module = (ModPlugFile *) internal->decoder_private;
/* Assume that this will work. */
ModPlug_Seek(module, ms);
return(1);
} /* MODPLUG_seek */
#endif /* SOUND_SUPPORTS_MODPLUG */
/* end of modplug.c ... */