/*====================================================================
 * mainbus.c
 *
 * Copyright 1993, Silicon Graphics, Inc.
 * All Rights Reserved.
 *
 * This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics,
 * Inc.; the contents of this file may not be disclosed to third
 * parties, copied or duplicated in any form, in whole or in part,
 * without the prior written permission of Silicon Graphics, Inc.
 *
 * RESTRICTED RIGHTS LEGEND:
 * Use, duplication or disclosure by the Government is subject to
 * restrictions as set forth in subdivision (c)(1)(ii) of the Rights
 * in Technical Data and Computer Software clause at DFARS
 * 252.227-7013, and/or in similar or successor clauses in the FAR,
 * DOD or NASA FAR Supplement. Unpublished - rights reserved under the
 * Copyright Laws of the United States.
 *====================================================================*/

#include <libaudio.h>
#include "synthInternals.h"

Acmd *alMainBusPull(void *filter, s16 *outp, s32 outCount, s32 sampleOffset, Acmd *p) 
{
    Acmd        *ptr = p;
    ALMainBus   *m = (ALMainBus *)filter;
    ALFilter    **sources = m->sources;
    s32         i;

    /*
     * clear the output buffers here
     */
    aClearBuffer(ptr++, AL_MAIN_L_OUT, outCount<<1);
    aClearBuffer(ptr++, AL_MAIN_R_OUT, outCount<<1);

    for (i = 0; i < m->sourceCount; i++) {
        ptr = (sources[i]->handler)(sources[i], outp, outCount, sampleOffset,
                                    ptr);
	aSetBuffer(ptr++, 0, 0, 0, outCount<<1);
	aMix(ptr++, 0, 0x7fff, AL_AUX_L_OUT, AL_MAIN_L_OUT);
	aMix(ptr++, 0, 0x7fff, AL_AUX_R_OUT, AL_MAIN_R_OUT);
    }
    
    return ptr;
}

s32 alMainBusParam(void *filter, s32 paramID, void *param)
{
    ALMainBus     *m = (ALMainBus *) filter;
    ALFilter    **sources = m->sources;
    
    switch (paramID) {

        case (AL_FILTER_ADD_SOURCE):
            sources[m->sourceCount++] = (ALFilter *) param;
            break;
            
        default:
            /* ??? */
            break;
    }

    return 0;
    
}