Instrument.java

package ibxm;

public class Instrument {
	public String name;
	public int vibrato_type, vibrato_sweep;
	public int vibrato_depth, vibrato_rate;
	public boolean volume_envelope_active, panning_envelope_active;
	public int volume_fade_out;
	
	private Envelope volume_envelope, panning_envelope;
	private int[] key_to_sample;
	private Sample[] samples;

	public Instrument() {
		name = "";
		set_volume_envelope( new Envelope() );
		set_panning_envelope( new Envelope() );
		key_to_sample = new int[ 96 ];
		set_num_samples( 1 );
	}
	
	public Envelope get_volume_envelope() {
		return volume_envelope;
	}
	
	public void set_volume_envelope( Envelope envelope ) {
		if( envelope != null ) {
			volume_envelope = envelope;
		}
	}
	
	public Envelope get_panning_envelope() {
		return panning_envelope;
	}
	
	public void set_panning_envelope( Envelope envelope ) {
		if( envelope != null ) {
			panning_envelope = envelope;
		}
	}
	
	public Sample get_sample_from_key( int key ) {
		int sample_idx;
		sample_idx = 0;
		if( key > 0 && key <= key_to_sample.length ) {
			sample_idx = key_to_sample[ key - 1 ];
		}
		return get_sample( sample_idx );
	}
	
	public void set_key_to_sample( int key, int sample ) {
		if( key > 0 && key <= key_to_sample.length ) {
			key_to_sample[ key - 1 ] = sample;
		}
	}
	
	public int get_num_samples() {
		return samples.length;
	}
	
	public void set_num_samples( int num_samples ) {
		if( num_samples < 1 ) {
			num_samples = 1;
		}
		samples = new Sample[ num_samples ];
		set_sample( 0, null );
	}
	
	public Sample get_sample( int sample_index ) {
		Sample sample;
		sample = null;
		if( sample_index >= 0 && sample_index < samples.length ) {
			sample = samples[ sample_index ];
		}
		if( sample == null ) {
			sample = samples[ 0 ];
		}
		return sample;
	}
	
	public void set_sample( int sample_index, Sample sample ) {
		if( sample_index >= 0 && sample_index < samples.length ) {
			samples[ sample_index ] = sample;
		}
		if( samples[ 0 ] == null ) {
			samples[ 0 ] = new Sample();
		}
	}
}