SRB2/libs/gme/gme/gme.cpp

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2014-03-15 16:59:03 +00:00
// Game_Music_Emu 0.6.0. http://www.slack.net/~ant/
#include "Music_Emu.h"
#include "gme_types.h"
#if !GME_DISABLE_STEREO_DEPTH
#include "Effects_Buffer.h"
#endif
#include "blargg_endian.h"
#include <string.h>
#include <ctype.h>
/* Copyright (C) 2003-2006 Shay Green. This module 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
module 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 module; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */
#include "blargg_source.h"
BLARGG_EXPORT gme_type_t const* gme_type_list()
{
static gme_type_t const gme_type_list_ [] = {
#ifdef GME_TYPE_LIST
GME_TYPE_LIST,
#else
#ifdef USE_GME_AY
gme_ay_type,
#endif
#ifdef USE_GME_GBS
gme_gbs_type,
#endif
#ifdef USE_GME_GYM
gme_gym_type,
#endif
#ifdef USE_GME_HES
gme_hes_type,
#endif
#ifdef USE_GME_KSS
gme_kss_type,
#endif
#ifdef USE_GME_NSF
gme_nsf_type,
#endif
#ifdef USE_GME_NSFE
gme_nsfe_type,
#endif
#ifdef USE_GME_SAP
gme_sap_type,
#endif
#ifdef USE_GME_SPC
gme_spc_type,
#endif
#ifdef USE_GME_VGM
gme_vgm_type,
gme_vgz_type,
#endif
#endif
0
};
return gme_type_list_;
}
BLARGG_EXPORT const char* gme_identify_header( void const* header )
{
switch ( get_be32( header ) )
{
case BLARGG_4CHAR('Z','X','A','Y'): return "AY";
case BLARGG_4CHAR('G','B','S',0x01): return "GBS";
case BLARGG_4CHAR('G','Y','M','X'): return "GYM";
case BLARGG_4CHAR('H','E','S','M'): return "HES";
case BLARGG_4CHAR('K','S','C','C'):
case BLARGG_4CHAR('K','S','S','X'): return "KSS";
case BLARGG_4CHAR('N','E','S','M'): return "NSF";
case BLARGG_4CHAR('N','S','F','E'): return "NSFE";
case BLARGG_4CHAR('S','A','P',0x0D): return "SAP";
case BLARGG_4CHAR('S','N','E','S'): return "SPC";
case BLARGG_4CHAR('V','g','m',' '): return "VGM";
}
return "";
}
static void to_uppercase( const char* in, int len, char* out )
{
for ( int i = 0; i < len; i++ )
{
if ( !(out [i] = toupper( in [i] )) )
return;
}
*out = 0; // extension too long
}
BLARGG_EXPORT gme_type_t gme_identify_extension( const char* extension_ )
{
char const* end = strrchr( extension_, '.' );
if ( end )
extension_ = end + 1;
char extension [6];
to_uppercase( extension_, sizeof extension, extension );
for ( gme_type_t const* types = gme_type_list(); *types; types++ )
if ( !strcmp( extension, (*types)->extension_ ) )
return *types;
return 0;
}
BLARGG_EXPORT gme_err_t gme_identify_file( const char* path, gme_type_t* type_out )
{
*type_out = gme_identify_extension( path );
// TODO: don't examine header if file has extension?
if ( !*type_out )
{
char header [4];
GME_FILE_READER in;
RETURN_ERR( in.open( path ) );
RETURN_ERR( in.read( header, sizeof header ) );
*type_out = gme_identify_extension( gme_identify_header( header ) );
}
return 0;
}
BLARGG_EXPORT gme_err_t gme_open_data( void const* data, long size, Music_Emu** out, int sample_rate )
{
require( (data || !size) && out );
*out = 0;
gme_type_t file_type = 0;
if ( size >= 4 )
file_type = gme_identify_extension( gme_identify_header( data ) );
if ( !file_type )
return gme_wrong_file_type;
Music_Emu* emu = gme_new_emu( file_type, sample_rate );
CHECK_ALLOC( emu );
gme_err_t err = gme_load_data( emu, data, size );
if ( err )
delete emu;
else
*out = emu;
return err;
}
BLARGG_EXPORT gme_err_t gme_open_file( const char* path, Music_Emu** out, int sample_rate )
{
require( path && out );
*out = 0;
GME_FILE_READER in;
RETURN_ERR( in.open( path ) );
char header [4];
int header_size = 0;
gme_type_t file_type = gme_identify_extension( path );
if ( !file_type )
{
header_size = sizeof header;
RETURN_ERR( in.read( header, sizeof header ) );
file_type = gme_identify_extension( gme_identify_header( header ) );
}
if ( !file_type )
return gme_wrong_file_type;
Music_Emu* emu = gme_new_emu( file_type, sample_rate );
CHECK_ALLOC( emu );
// optimization: avoids seeking/re-reading header
Remaining_Reader rem( header, header_size, &in );
gme_err_t err = emu->load( rem );
in.close();
if ( err )
delete emu;
else
*out = emu;
return err;
}
BLARGG_EXPORT Music_Emu* gme_new_emu( gme_type_t type, int rate )
{
if ( type )
{
if ( rate == gme_info_only )
return type->new_info();
Music_Emu* me = type->new_emu();
if ( me )
{
#if !GME_DISABLE_STEREO_DEPTH
if ( type->flags_ & 1 )
{
me->effects_buffer = BLARGG_NEW Effects_Buffer;
if ( me->effects_buffer )
me->set_buffer( me->effects_buffer );
}
if ( !(type->flags_ & 1) || me->effects_buffer )
#endif
{
if ( !me->set_sample_rate( rate ) )
{
check( me->type() == type );
return me;
}
}
delete me;
}
}
return 0;
}
BLARGG_EXPORT gme_err_t gme_load_file( Music_Emu* me, const char* path ) { return me->load_file( path ); }
BLARGG_EXPORT gme_err_t gme_load_data( Music_Emu* me, void const* data, long size )
{
Mem_File_Reader in( data, size );
return me->load( in );
}
BLARGG_EXPORT gme_err_t gme_load_custom( Music_Emu* me, gme_reader_t func, long size, void* data )
{
Callback_Reader in( func, size, data );
return me->load( in );
}
BLARGG_EXPORT void gme_delete( Music_Emu* me ) { delete me; }
BLARGG_EXPORT gme_type_t gme_type( Music_Emu const* me ) { return me->type(); }
BLARGG_EXPORT const char* gme_warning( Music_Emu* me ) { return me->warning(); }
BLARGG_EXPORT int gme_track_count( Music_Emu const* me ) { return me->track_count(); }
struct gme_info_t_ : gme_info_t
{
track_info_t info;
BLARGG_DISABLE_NOTHROW
};
BLARGG_EXPORT gme_err_t gme_track_info( Music_Emu const* me, gme_info_t** out, int track )
{
*out = NULL;
gme_info_t_* info = BLARGG_NEW gme_info_t_;
CHECK_ALLOC( info );
gme_err_t err = me->track_info( &info->info, track );
if ( err )
{
gme_free_info( info );
return err;
}
#define COPY(name) info->name = info->info.name;
COPY( length );
COPY( intro_length );
COPY( loop_length );
info->i4 = -1;
info->i5 = -1;
info->i6 = -1;
info->i7 = -1;
info->i8 = -1;
info->i9 = -1;
info->i10 = -1;
info->i11 = -1;
info->i12 = -1;
info->i13 = -1;
info->i14 = -1;
info->i15 = -1;
info->s7 = "";
info->s8 = "";
info->s9 = "";
info->s10 = "";
info->s11 = "";
info->s12 = "";
info->s13 = "";
info->s14 = "";
info->s15 = "";
COPY( system );
COPY( game );
COPY( song );
COPY( author );
COPY( copyright );
COPY( comment );
COPY( dumper );
#undef COPY
info->play_length = info->length;
if ( info->play_length <= 0 )
{
info->play_length = info->intro_length + 2 * info->loop_length; // intro + 2 loops
if ( info->play_length <= 0 )
info->play_length = 150 * 1000; // 2.5 minutes
}
*out = info;
return 0;
}
BLARGG_EXPORT void gme_free_info( gme_info_t* info )
{
delete STATIC_CAST(gme_info_t_*,info);
}
BLARGG_EXPORT void gme_set_stereo_depth( Music_Emu* me, double depth )
{
#if !GME_DISABLE_STEREO_DEPTH
if ( me->effects_buffer )
STATIC_CAST(Effects_Buffer*,me->effects_buffer)->set_depth( depth );
#endif
}
BLARGG_EXPORT void* gme_user_data ( Music_Emu const* me ) { return me->user_data(); }
BLARGG_EXPORT void gme_set_user_data ( Music_Emu* me, void* new_user_data ) { me->set_user_data( new_user_data ); }
BLARGG_EXPORT void gme_set_user_cleanup(Music_Emu* me, gme_user_cleanup_t func ) { me->set_user_cleanup( func ); }
BLARGG_EXPORT gme_err_t gme_start_track ( Music_Emu* me, int index ) { return me->start_track( index ); }
BLARGG_EXPORT gme_err_t gme_play ( Music_Emu* me, int n, short* p ) { return me->play( n, p ); }
BLARGG_EXPORT void gme_set_fade ( Music_Emu* me, int start_msec ) { me->set_fade( start_msec ); }
BLARGG_EXPORT int gme_track_ended ( Music_Emu const* me ) { return me->track_ended(); }
BLARGG_EXPORT int gme_tell ( Music_Emu const* me ) { return me->tell(); }
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BLARGG_EXPORT int gme_tell_samples ( Music_Emu const* me ) { return me->tell_samples(); }
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BLARGG_EXPORT gme_err_t gme_seek ( Music_Emu* me, int msec ) { return me->seek( msec ); }
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BLARGG_EXPORT gme_err_t gme_seek_samples ( Music_Emu* me, int n ) { return me->seek_samples( n ); }
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BLARGG_EXPORT int gme_voice_count ( Music_Emu const* me ) { return me->voice_count(); }
BLARGG_EXPORT void gme_ignore_silence ( Music_Emu* me, int disable ) { me->ignore_silence( disable != 0 ); }
BLARGG_EXPORT void gme_set_tempo ( Music_Emu* me, double t ) { me->set_tempo( t ); }
BLARGG_EXPORT void gme_mute_voice ( Music_Emu* me, int index, int mute ) { me->mute_voice( index, mute != 0 ); }
BLARGG_EXPORT void gme_mute_voices ( Music_Emu* me, int mask ) { me->mute_voices( mask ); }
BLARGG_EXPORT void gme_enable_accuracy( Music_Emu* me, int enabled ) { me->enable_accuracy( enabled ); }
BLARGG_EXPORT void gme_clear_playlist ( Music_Emu* me ) { me->clear_playlist(); }
BLARGG_EXPORT int gme_type_multitrack( gme_type_t t ) { return t->track_count != 1; }
BLARGG_EXPORT void gme_set_equalizer ( Music_Emu* me, gme_equalizer_t const* eq )
{
Music_Emu::equalizer_t e = me->equalizer();
e.treble = eq->treble;
e.bass = eq->bass;
me->set_equalizer( e );
}
BLARGG_EXPORT void gme_equalizer( Music_Emu const* me, gme_equalizer_t* out )
{
gme_equalizer_t e = gme_equalizer_t(); // Default-init all fields to 0.0f
e.treble = me->equalizer().treble;
e.bass = me->equalizer().bass;
*out = e;
}
BLARGG_EXPORT const char* gme_voice_name( Music_Emu const* me, int i )
{
assert( (unsigned) i < (unsigned) me->voice_count() );
return me->voice_names() [i];
}
BLARGG_EXPORT const char* gme_type_system( gme_type_t type )
{
assert( type );
return type->system;
}