/********* music class ************

By Michael Garcia mgarcia
email gwald@start.com.au

********* music class ************/

#include "music.h"
#include <stdio.h>

music_c::music_c(unsigned long *seq,
		unsigned long *vh,
		unsigned long *vb, 
		short mvol,
		short svol,
		char mode,
		 char count)
{
	seqAdd_m =seq;
	vhAdd_m = vh;
	vbAdd_m = vb;
	mvol_m = mvol;
	svol_m = svol;
	mode_m = mode;
	count_m = count;
	
	if(seq) init();

}


char music_c::init()
{
		/* VAB opening and transmission to sound buffer */
	vabId_m = SsVabTransfer( (unsigned char*)vhAdd_m, (unsigned char*)vbAdd_m, -1, 1 );
	if (vabId_m < 0) {
		printf("SsVabTransfer failed (%d)\n", vabId_m);
		return -1;
	}

	/* SEQ opening */
	seqId_m = SsSeqOpen((unsigned long *)seqAdd_m, vabId_m);
	if (seqId_m < 0)
	{
		printf("SsSeqOpen failed (%d)\n", seqAdd_m);
		return -1;
	}

	return vabId_m;

}


void music_c::play()
{
	SsSetMVol(mvol_m, mvol_m);			/* Main volume setting*/
	SsSeqSetVol(seqId_m, svol_m, svol_m);		/* Volume setting for each SEQ */
	SsSeqPlay(seqId_m, mode_m ,count_m);/* Playback switch ON */
}

/* Sound playback termination */
void music_c::stop()
{
	SsSeqStop(seqId_m);			/* Playback switch OFF */
	VSync(0);
	VSync(0);
	SsSeqClose(seqId_m);			/* SEQ close */
	 SsVabClose(vabId_m);			/* VAB close */
}

void music_c::fadeOut(unsigned long  dur)
{

	for(int i = svol_m*dur; i>0; i--)
		SsSeqSetVol(seqId_m, i/dur, i/dur);		/* Volume setting for each SEQ */

	stop();
 
}



void music_c::fadeIn(unsigned long  dur)
{
	SsSetMVol(mvol_m, mvol_m);			/* Main volume setting*/

	SsSeqSetVol(seqId_m, 1, 1);		/* Volume setting for each SEQ */
	
	SsSeqPlay(seqId_m, mode_m ,count_m);/* Playback switch ON */
	
	for(int i = 0; i<svol_m*dur; i++)
	SsSeqSetVol(seqId_m, i/dur, i/dur);		/* Volume setting for each SEQ */

}


void music_c::vol(unsigned long  vol)
{
	SsSeqSetVol(seqId_m,vol,vol);		/* Volume setting for each SEQ */

}