music.c

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/*****************************************************************************
 * ugBASIC - an isomorphic BASIC language compiler for retrocomputers        *
 *****************************************************************************
 * Copyright 2021-2026 Marco Spedaletti (asimov@mclink.it)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *----------------------------------------------------------------------------
 * Concesso in licenza secondo i termini della Licenza Apache, versione 2.0
 * (la "Licenza"); è proibito usare questo file se non in conformità alla
 * Licenza. Una copia della Licenza è disponibile all'indirizzo:
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Se non richiesto dalla legislazione vigente o concordato per iscritto,
 * il software distribuito nei termini della Licenza è distribuito
 * "COSÌ COM'È", SENZA GARANZIE O CONDIZIONI DI ALCUN TIPO, esplicite o
 * implicite. Consultare la Licenza per il testo specifico che regola le
 * autorizzazioni e le limitazioni previste dalla medesima.
 ****************************************************************************/
 
/****************************************************************************
 * INCLUDE SECTION 
 ****************************************************************************/
 
#include "../../ugbc.h"
 
/****************************************************************************
 * CODE SECTION 
 ****************************************************************************/

/* <usermanual>
@keyword MUSIC
@target cpc
</usermanual> */
void music_var( Environment * _environment, char * _music, int _loop, int _music_type ) {
 
    if ( _environment->emptyProcedure ) {
        return;
    }
 
    Variable * music = variable_retrieve( _environment, _music );
 
    if ( _music_type == MUSIC_TYPE_AUTO ) {
        if ( music->type != VT_MUSIC ) {
            CRITICAL_CANNOT_MUSIC( _music );
        }
        if ( ! music->sidFile ) {
            ay8910_start( _environment, 0x07 );
            ay8910_music( _environment, music->realName, music->size, _loop );
        }
    }
    
}
 
/* <usermanual>
@keyword MUSIC PAUSE
 
@target cpc
</usermanual> */
void music_pause( Environment * _environment ) {
 
    deploy( music, src_hw_ay8910_music_asm );
 
    variable_store( _environment, "AY8910MUSICPAUSE", 0xff );
    volume( _environment, 0, 0x7 );
 
}
 
/* <usermanual>
@keyword MUSIC RESUME
 
@target cpc
</usermanual> */
void music_resume( Environment * _environment ) {
 
    deploy( music, src_hw_ay8910_music_asm );
 
    variable_store( _environment, "AY8910MUSICPAUSE", 0x0 );
    volume( _environment, 255, 0x7 );
 
}
 
/* <usermanual>
@keyword MUSIC STOP
 
@target cpc
</usermanual> */
void music_stop( Environment * _environment ) {
 
    deploy( music, src_hw_ay8910_music_asm );
 
    variable_store( _environment, "AY8910MUSICLOOP", 0x0 );
    variable_store( _environment, "AY8910MUSICREADY", 0x0 );
    volume( _environment, 0, 0x7 );
 
} 
 
/* <usermanual>
@keyword MUSIC SEEK
 
@target cpc
</usermanual> */
void music_seek_var( Environment * _environment, char * _position ) {
 
    deploy( music, src_hw_ay8910_music_asm );
 
    Variable * position = variable_retrieve_or_define( _environment, _position, VT_WORD, 0 );
 
    cpu_move_8bit( _environment, address_displacement( _environment, position->realName, "1" ), "AY8910BLOCKS" );
    cpu_move_8bit( _environment, position->realName, "AY8910LASTBLOCK" );
 
}