# HG changeset patch # User Ryan C. Gordon # Date 1010625384 0 # Node ID 857e53c5a2da72ad32f9e0903ce800d2434c4844 # Parent 0254ff448a631d6ac4db030d55e1b37a28592667 Renamed from mod.c (see modplug.c for the OTHER mod decoder). diff -r 0254ff448a63 -r 857e53c5a2da decoders/mikmod.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/decoders/mikmod.c Thu Jan 10 01:16:24 2002 +0000 @@ -0,0 +1,272 @@ +/* + * 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 MikMod does, and + * is based on SDL_mixer. + * + * Please see the file COPYING in the source's root directory. + * + * This file written by Torbjörn Andersson (d91tan@Update.UU.SE) + */ + +#if HAVE_CONFIG_H +# include +#endif + +#ifdef SOUND_SUPPORTS_MIKMOD + +#include +#include +#include +#include + +#include "SDL_sound.h" + +#define __SDL_SOUND_INTERNAL__ +#include "SDL_sound_internal.h" + +#include "mikmod.h" + + +static int MIKMOD_init(void); +static void MIKMOD_quit(void); +static int MIKMOD_open(Sound_Sample *sample, const char *ext); +static void MIKMOD_close(Sound_Sample *sample); +static Uint32 MIKMOD_read(Sound_Sample *sample); + +static const char *extensions_mikmod[] = +{ + "MOD", "IT", "XM", "S3M", "MTM", "669", "STM", "ULT", + "FAR", "MED", "AMF", "DSM", "IMF", "GDM", "STX", "OKT", + NULL +}; + +const Sound_DecoderFunctions __Sound_DecoderFunctions_MIKMOD = +{ + { + extensions_mikmod, + "Play modules through MikMod", + "Torbjörn Andersson ", + "http://www.mikmod.org/" + }, + + MIKMOD_init, /* init() method */ + MIKMOD_quit, /* quit() method */ + MIKMOD_open, /* open() method */ + MIKMOD_close, /* close() method */ + MIKMOD_read /* read() method */ +}; + + +/* Make MikMod read from a RWops... */ + +typedef struct MRWOPSREADER { + MREADER core; + Sound_Sample *sample; + int end; +} MRWOPSREADER; + +static BOOL _mm_RWopsReader_eof(MREADER *reader) +{ + MRWOPSREADER *rwops_reader = (MRWOPSREADER *) reader; + Sound_Sample *sample = rwops_reader->sample; + Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; + int pos = SDL_RWtell(internal->rw); + + if (rwops_reader->end == pos) + return(1); + + return(0); +} /* _mm_RWopsReader_eof */ + + +static BOOL _mm_RWopsReader_read(MREADER *reader, void *ptr, size_t size) +{ + MRWOPSREADER *rwops_reader = (MRWOPSREADER *) reader; + Sound_Sample *sample = rwops_reader->sample; + Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; + return(SDL_RWread(internal->rw, ptr, size, 1)); +} /* _mm_RWopsReader_Read */ + + +static int _mm_RWopsReader_get(MREADER *reader) +{ + char buf; + MRWOPSREADER *rwops_reader = (MRWOPSREADER *) reader; + Sound_Sample *sample = rwops_reader->sample; + Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; + + if (SDL_RWread(internal->rw, &buf, 1, 1) != 1) + return(EOF); + + return((int) buf); +} /* _mm_RWopsReader_get */ + + +static BOOL _mm_RWopsReader_seek(MREADER *reader, long offset, int whence) +{ + MRWOPSREADER *rwops_reader = (MRWOPSREADER *) reader; + Sound_Sample *sample = rwops_reader->sample; + Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; + + return(SDL_RWseek(internal->rw, offset, whence)); +} /* _mm_RWopsReader_seek */ + + +static long _mm_RWopsReader_tell(MREADER *reader) +{ + MRWOPSREADER *rwops_reader = (MRWOPSREADER *) reader; + Sound_Sample *sample = rwops_reader->sample; + Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; + + return(SDL_RWtell(internal->rw)); +} /* _mm_RWopsReader_tell */ + + +static MREADER *_mm_new_rwops_reader(Sound_Sample *sample) +{ + Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; + + MRWOPSREADER *reader = (MRWOPSREADER *) malloc(sizeof (MRWOPSREADER)); + if (reader != NULL) + { + int here; + reader->core.Eof = _mm_RWopsReader_eof; + reader->core.Read = _mm_RWopsReader_read; + reader->core.Get = _mm_RWopsReader_get; + reader->core.Seek = _mm_RWopsReader_seek; + reader->core.Tell = _mm_RWopsReader_tell; + reader->sample = sample; + + /* RWops does not explicitly support an eof check, so we shall find + the end manually - this requires seek support for the RWop */ + here = SDL_RWtell(internal->rw); + reader->end = SDL_RWseek(internal->rw, 0, SEEK_END); + SDL_RWseek(internal->rw, here, SEEK_SET); /* Move back */ + /* !!! FIXME: What happens if the seek fails? */ + } /* if */ + + return((MREADER *) reader); +} /* _mm_new_rwops_reader */ + + +static void _mm_delete_rwops_reader(MREADER *reader) +{ + /* SDL_sound will delete the RWops and sample at a higher level... */ + if (reader != NULL) + free(reader); +} /* _mm_delete_rwops_reader */ + + + +static int MIKMOD_init(void) +{ + MikMod_RegisterDriver(&drv_nos); + MikMod_RegisterAllLoaders(); + + /* + * Both DMODE_SOFT_MUSIC and DMODE_16BITS should be set by default, + * so this is just for clarity. I haven't experimented with any of + * the other flags. There are a few which are said to give better + * sound quality. + */ + md_mode |= (DMODE_SOFT_MUSIC | DMODE_16BITS); + md_mixfreq = 0; + + BAIL_IF_MACRO(MikMod_Init(""), MikMod_strerror(MikMod_errno), 0); + + return(1); /* success. */ +} /* MIKMOD_init */ + + +static void MIKMOD_quit(void) +{ + MikMod_Exit(); + md_mixfreq = 0; +} /* MIKMOD_quit */ + + +static int MIKMOD_open(Sound_Sample *sample, const char *ext) +{ + Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; + MREADER *reader; + MODULE *module; + + reader = _mm_new_rwops_reader(sample); + BAIL_IF_MACRO(reader == NULL, ERR_OUT_OF_MEMORY, 0); + module = Player_LoadGeneric(reader, 64, 0); + _mm_delete_rwops_reader(reader); + BAIL_IF_MACRO(module == NULL, "MIKMOD: Not a module file.", 0); + + module->extspd = 1; + module->panflag = 1; + module->wrap = 0; + module->loop = 0; + + if (md_mixfreq == 0) + md_mixfreq = (!sample->desired.rate) ? 44100 : sample->desired.rate; + + sample->actual.channels = 2; + sample->actual.rate = md_mixfreq; + sample->actual.format = AUDIO_S16SYS; + internal->decoder_private = (void *) module; + + Player_Start(module); + Player_SetPosition(0); + + /* !!! FIXME: A little late to be giving this information... */ + sample->flags = SOUND_SAMPLEFLAG_NEEDSEEK; + + SNDDBG(("MIKMOD: Name: %s\n", module->songname)); + SNDDBG(("MIKMOD: Type: %s\n", module->modtype)); + SNDDBG(("MIKMOD: Accepting data stream\n")); + + return(1); /* we'll handle this data. */ +} /* MIKMOD_open */ + + +static void MIKMOD_close(Sound_Sample *sample) +{ + Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; + MODULE *module = (MODULE *) internal->decoder_private; + + Player_Free(module); +} /* MIKMOD_close */ + + +static Uint32 MIKMOD_read(Sound_Sample *sample) +{ + Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; + MODULE *module = (MODULE *) internal->decoder_private; + + /* Switch to the current module, stopping any previous one. */ + Player_Start(module); + if (!Player_Active()) + { + sample->flags |= SOUND_SAMPLEFLAG_EOF; + return(0); + } /* if */ + return((Uint32) VC_WriteBytes(internal->buffer, internal->buffer_size)); +} /* MIKMOD_read */ + +#endif /* SOUND_SUPPORTS_MIKMOD */ + + +/* end of mikmod.c ... */