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410 lines
11 KiB
C++
410 lines
11 KiB
C++
// Game_Music_Emu https://bitbucket.org/mpyne/game-music-emu/
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#include "Music_Emu.h"
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#include "gme_types.h"
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#if !GME_DISABLE_STEREO_DEPTH
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#include "Effects_Buffer.h"
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#endif
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#include "blargg_endian.h"
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#include <string.h>
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#include <ctype.h>
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/* Copyright (C) 2003-2006 Shay Green. This module is free software; you
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can redistribute it and/or modify it under the terms of the GNU Lesser
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General Public License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version. This
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module is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
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details. You should have received a copy of the GNU Lesser General Public
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License along with this module; if not, write to the Free Software Foundation,
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Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */
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#include "blargg_source.h"
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BLARGG_EXPORT gme_type_t const* gme_type_list()
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{
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static gme_type_t const gme_type_list_ [] = {
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#ifdef GME_TYPE_LIST
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GME_TYPE_LIST,
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#else
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#ifdef USE_GME_AY
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gme_ay_type,
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#endif
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#ifdef USE_GME_GBS
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gme_gbs_type,
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#endif
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#ifdef USE_GME_GYM
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gme_gym_type,
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#endif
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#ifdef USE_GME_HES
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gme_hes_type,
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#endif
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#ifdef USE_GME_KSS
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gme_kss_type,
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#endif
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#ifdef USE_GME_NSF
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gme_nsf_type,
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#endif
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#ifdef USE_GME_NSFE
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gme_nsfe_type,
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#endif
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#ifdef USE_GME_SAP
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gme_sap_type,
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#endif
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#ifdef USE_GME_SPC
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gme_spc_type,
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#endif
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#ifdef USE_GME_VGM
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gme_vgm_type,
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gme_vgz_type,
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#endif
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#endif
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0
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};
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return gme_type_list_;
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}
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BLARGG_EXPORT const char* gme_identify_header( void const* header )
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{
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switch ( get_be32( header ) )
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{
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case BLARGG_4CHAR('Z','X','A','Y'): return "AY";
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case BLARGG_4CHAR('G','B','S',0x01): return "GBS";
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case BLARGG_4CHAR('G','Y','M','X'): return "GYM";
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case BLARGG_4CHAR('H','E','S','M'): return "HES";
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case BLARGG_4CHAR('K','S','C','C'):
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case BLARGG_4CHAR('K','S','S','X'): return "KSS";
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case BLARGG_4CHAR('N','E','S','M'): return "NSF";
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case BLARGG_4CHAR('N','S','F','E'): return "NSFE";
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case BLARGG_4CHAR('S','A','P',0x0D): return "SAP";
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case BLARGG_4CHAR('S','N','E','S'): return "SPC";
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case BLARGG_4CHAR('V','g','m',' '): return "VGM";
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}
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if (get_be16(header) == BLARGG_2CHAR(0x1F, 0x8B))
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return "VGZ";
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return "";
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}
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static void to_uppercase( const char* in, int len, char* out )
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{
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for ( int i = 0; i < len; i++ )
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{
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if ( !(out [i] = toupper( in [i] )) )
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return;
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}
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*out = 0; // extension too long
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}
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BLARGG_EXPORT gme_type_t gme_identify_extension( const char* extension_ )
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{
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char const* end = strrchr( extension_, '.' );
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if ( end )
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extension_ = end + 1;
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char extension [6];
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to_uppercase( extension_, sizeof extension, extension );
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for ( gme_type_t const* types = gme_type_list(); *types; types++ )
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if ( !strcmp( extension, (*types)->extension_ ) )
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return *types;
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return 0;
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}
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BLARGG_EXPORT const char *gme_type_extension( gme_type_t music_type )
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{
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const gme_type_t_ *const music_typeinfo = static_cast<const gme_type_t_ *>( music_type );
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if ( music_type )
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return music_typeinfo->extension_;
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return "";
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}
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BLARGG_EXPORT gme_err_t gme_identify_file( const char* path, gme_type_t* type_out )
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{
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*type_out = gme_identify_extension( path );
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// TODO: don't examine header if file has extension?
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if ( !*type_out )
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{
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char header [4];
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GME_FILE_READER in;
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RETURN_ERR( in.open( path ) );
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RETURN_ERR( in.read( header, sizeof header ) );
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*type_out = gme_identify_extension( gme_identify_header( header ) );
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}
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return 0;
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}
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BLARGG_EXPORT gme_err_t gme_open_data( void const* data, long size, Music_Emu** out, int sample_rate )
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{
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require( (data || !size) && out );
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*out = 0;
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gme_type_t file_type = 0;
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if ( size >= 4 )
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file_type = gme_identify_extension( gme_identify_header( data ) );
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if ( !file_type )
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return gme_wrong_file_type;
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Music_Emu* emu = gme_new_emu( file_type, sample_rate );
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CHECK_ALLOC( emu );
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gme_err_t err = gme_load_data( emu, data, size );
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if ( err )
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delete emu;
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else
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*out = emu;
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return err;
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}
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BLARGG_EXPORT gme_err_t gme_open_file( const char* path, Music_Emu** out, int sample_rate )
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{
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require( path && out );
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*out = 0;
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GME_FILE_READER in;
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RETURN_ERR( in.open( path ) );
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char header [4];
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int header_size = 0;
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gme_type_t file_type = gme_identify_extension( path );
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if ( !file_type )
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{
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header_size = sizeof header;
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RETURN_ERR( in.read( header, sizeof header ) );
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file_type = gme_identify_extension( gme_identify_header( header ) );
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}
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if ( !file_type )
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return gme_wrong_file_type;
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Music_Emu* emu = gme_new_emu( file_type, sample_rate );
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CHECK_ALLOC( emu );
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// optimization: avoids seeking/re-reading header
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Remaining_Reader rem( header, header_size, &in );
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gme_err_t err = emu->load( rem );
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in.close();
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if ( err )
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delete emu;
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else
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*out = emu;
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return err;
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}
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// Used to implement gme_new_emu and gme_new_emu_multi_channel
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Music_Emu* gme_internal_new_emu_( gme_type_t type, int rate, bool multi_channel )
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{
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if ( type )
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{
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if ( rate == gme_info_only )
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return type->new_info();
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Music_Emu* me = type->new_emu();
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if ( me )
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{
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#if !GME_DISABLE_STEREO_DEPTH
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me->set_multi_channel( multi_channel );
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if ( type->flags_ & 1 )
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{
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if ( me->multi_channel() )
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{
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me->effects_buffer = BLARGG_NEW Effects_Buffer(8);
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}
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else
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{
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me->effects_buffer = BLARGG_NEW Effects_Buffer(1);
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}
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if ( me->effects_buffer )
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me->set_buffer( me->effects_buffer );
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}
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if ( !(type->flags_ & 1) || me->effects_buffer )
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#endif
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{
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if ( !me->set_sample_rate( rate ) )
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{
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check( me->type() == type );
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return me;
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}
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}
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delete me;
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}
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}
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return 0;
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}
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BLARGG_EXPORT Music_Emu* gme_new_emu( gme_type_t type, int rate )
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{
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return gme_internal_new_emu_( type, rate, false /* no multichannel */);
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}
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BLARGG_EXPORT Music_Emu* gme_new_emu_multi_channel( gme_type_t type, int rate )
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{
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// multi-channel emulator (if possible, not all emu types support multi-channel)
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return gme_internal_new_emu_( type, rate, true /* multichannel */);
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}
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BLARGG_EXPORT gme_err_t gme_load_file( Music_Emu* me, const char* path ) { return me->load_file( path ); }
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BLARGG_EXPORT gme_err_t gme_load_data( Music_Emu* me, void const* data, long size )
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{
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Mem_File_Reader in( data, size );
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return me->load( in );
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}
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BLARGG_EXPORT gme_err_t gme_load_custom( Music_Emu* me, gme_reader_t func, long size, void* data )
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{
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Callback_Reader in( func, size, data );
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return me->load( in );
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}
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BLARGG_EXPORT void gme_delete( Music_Emu* me ) { delete me; }
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BLARGG_EXPORT gme_type_t gme_type( Music_Emu const* me ) { return me->type(); }
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BLARGG_EXPORT const char* gme_warning( Music_Emu* me ) { return me->warning(); }
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BLARGG_EXPORT int gme_track_count( Music_Emu const* me ) { return me->track_count(); }
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struct gme_info_t_ : gme_info_t
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{
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track_info_t info;
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BLARGG_DISABLE_NOTHROW
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};
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BLARGG_EXPORT gme_err_t gme_track_info( Music_Emu const* me, gme_info_t** out, int track )
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{
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*out = NULL;
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gme_info_t_* info = BLARGG_NEW gme_info_t_;
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CHECK_ALLOC( info );
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gme_err_t err = me->track_info( &info->info, track );
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if ( err )
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{
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gme_free_info( info );
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return err;
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}
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#define COPY(name) info->name = info->info.name;
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COPY( length );
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COPY( intro_length );
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COPY( loop_length );
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info->i4 = -1;
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info->i5 = -1;
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info->i6 = -1;
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info->i7 = -1;
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info->i8 = -1;
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info->i9 = -1;
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info->i10 = -1;
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info->i11 = -1;
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info->i12 = -1;
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info->i13 = -1;
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info->i14 = -1;
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info->i15 = -1;
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info->s7 = "";
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info->s8 = "";
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info->s9 = "";
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info->s10 = "";
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info->s11 = "";
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info->s12 = "";
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info->s13 = "";
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info->s14 = "";
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info->s15 = "";
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COPY( system );
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COPY( game );
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COPY( song );
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COPY( author );
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COPY( copyright );
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COPY( comment );
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COPY( dumper );
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#undef COPY
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info->play_length = info->length;
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if ( info->play_length <= 0 )
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{
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info->play_length = info->intro_length + 2 * info->loop_length; // intro + 2 loops
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if ( info->play_length <= 0 )
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info->play_length = 150 * 1000; // 2.5 minutes
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}
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*out = info;
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return 0;
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}
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BLARGG_EXPORT void gme_free_info( gme_info_t* info )
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{
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delete STATIC_CAST(gme_info_t_*,info);
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}
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BLARGG_EXPORT void gme_set_stereo_depth( Music_Emu* me, double depth )
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{
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#if !GME_DISABLE_STEREO_DEPTH
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if ( me->effects_buffer )
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STATIC_CAST(Effects_Buffer*,me->effects_buffer)->set_depth( depth );
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#endif
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}
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BLARGG_EXPORT void* gme_user_data ( Music_Emu const* me ) { return me->user_data(); }
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BLARGG_EXPORT void gme_set_user_data ( Music_Emu* me, void* new_user_data ) { me->set_user_data( new_user_data ); }
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BLARGG_EXPORT void gme_set_user_cleanup(Music_Emu* me, gme_user_cleanup_t func ) { me->set_user_cleanup( func ); }
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BLARGG_EXPORT gme_err_t gme_start_track ( Music_Emu* me, int index ) { return me->start_track( index ); }
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BLARGG_EXPORT gme_err_t gme_play ( Music_Emu* me, int n, short* p ) { return me->play( n, p ); }
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BLARGG_EXPORT void gme_set_fade ( Music_Emu* me, int start_msec ) { me->set_fade( start_msec ); }
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BLARGG_EXPORT int gme_track_ended ( Music_Emu const* me ) { return me->track_ended(); }
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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(); }
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BLARGG_EXPORT void gme_ignore_silence ( Music_Emu* me, int disable ) { me->ignore_silence( disable != 0 ); }
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BLARGG_EXPORT void gme_set_tempo ( Music_Emu* me, double t ) { me->set_tempo( t ); }
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BLARGG_EXPORT void gme_mute_voice ( Music_Emu* me, int index, int mute ) { me->mute_voice( index, mute != 0 ); }
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BLARGG_EXPORT void gme_mute_voices ( Music_Emu* me, int mask ) { me->mute_voices( mask ); }
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BLARGG_EXPORT void gme_enable_accuracy( Music_Emu* me, int enabled ) { me->enable_accuracy( enabled ); }
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BLARGG_EXPORT void gme_clear_playlist ( Music_Emu* me ) { me->clear_playlist(); }
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BLARGG_EXPORT int gme_type_multitrack( gme_type_t t ) { return t->track_count != 1; }
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BLARGG_EXPORT int gme_multi_channel ( Music_Emu const* me ) { return me->multi_channel(); }
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BLARGG_EXPORT void gme_set_equalizer ( Music_Emu* me, gme_equalizer_t const* eq )
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{
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Music_Emu::equalizer_t e = me->equalizer();
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e.treble = eq->treble;
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e.bass = eq->bass;
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me->set_equalizer( e );
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}
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BLARGG_EXPORT void gme_equalizer( Music_Emu const* me, gme_equalizer_t* out )
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{
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gme_equalizer_t e = gme_equalizer_t(); // Default-init all fields to 0.0f
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e.treble = me->equalizer().treble;
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e.bass = me->equalizer().bass;
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*out = e;
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}
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BLARGG_EXPORT const char* gme_voice_name( Music_Emu const* me, int i )
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{
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assert( (unsigned) i < (unsigned) me->voice_count() );
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return me->voice_names() [i];
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}
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BLARGG_EXPORT const char* gme_type_system( gme_type_t type )
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{
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assert( type );
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return type->system;
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}
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