volume.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
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 *----------------------------------------------------------------------------
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/****************************************************************************
 * INCLUDE SECTION 
 ****************************************************************************/
 
#include "../../ugbc.h"
 
/****************************************************************************
 * CODE SECTION 
 ****************************************************************************/

/* <usermanual>
@keyword VOLUME
 
@english
This command allows you to change the volume at which the audio is generated. 
In general, you can change the overall audio, or that of each individual voice.
 
@italian
Questo comando permette di modificare il volume con cui l'audio viene generato.
In generale è possibile modificare l'audio complessivo, oppure quello di ogni
singola voce.
 
@syntax VOLUME #[value] {ON #[channels]}
 
@example VOLUME #255
@example VOLUME #0 ON #%001
 
@target cpc
</usermanual> */
void volume( Environment * _environment, int _volume, int _channels ) {
 
    ay8910_set_volume( _environment, _channels, _volume/16 );
 
}

/* <usermanual>
@keyword VOLUME
 
@syntax VOLUME [volume] {ON [channels]}
 
@example VOLUME massimo
@example VOLUME zero ON voice1
 
@target cpc
</usermanual> */
void volume_vars( Environment * _environment, char * _volume, char * _channels ) {
 
    Variable * volume = variable_retrieve_or_define( _environment, _volume, VT_BYTE, 255 );
    if ( _channels ) {
        Variable * channels = variable_retrieve_or_define( _environment, _channels, VT_WORD, 0x07 );
        ay8910_set_volume_vars( _environment, channels->realName, volume->realName );
    } else {
        ay8910_set_volume_vars( _environment, NULL, volume->realName );
    }
 
}