n_seqpsetchlvol.c 1.27 KB
/*====================================================================
 *
 * 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 * This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics,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 Unpublished - rights reserved under the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 "n_libaudio.h"

void n_alSeqpSetChlVol(N_ALSeqPlayer *seqp, u8 chan, u8 vol)
{
    N_ALEvent       evt;

    evt.type            = AL_SEQP_MIDI_EVT;
    evt.msg.midi.ticks  = 0;
    evt.msg.midi.status = AL_MIDI_ControlChange | chan;
    evt.msg.midi.byte1  = AL_MIDI_VOLUME_CTRL;
    evt.msg.midi.byte2  = vol;
                    
    n_alEvtqPostEvent(&seqp->evtq, &evt, 0);
}