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/* ScummVM - Scumm Interpreter
* Dreamcast port
* Copyright (C) 2002 Marcus Comstedt
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*
*/
#include "stdafx.h"
#include "scumm.h"
#include "dc.h"
#include <ronin/soundcommon.h>
EXTERN_C void *memcpy4(void *s1, const void *s2, unsigned int n);
void checkSound(Scumm *s)
{
int n;
int curr_ring_buffer_samples;
if(read_sound_int(&SOUNDSTATUS->mode) != MODE_PLAY)
start_sound();
curr_ring_buffer_samples = read_sound_int(&SOUNDSTATUS->ring_length);
n = read_sound_int(&SOUNDSTATUS->samplepos);
if((n-=fillpos)<0)
n += curr_ring_buffer_samples;
n = ADJUST_BUFFER_SIZE(n-10);
if(n<100)
return;
s->mixWaves((short*)temp_sound_buffer, n);
if(fillpos+n > curr_ring_buffer_samples) {
int r = curr_ring_buffer_samples - fillpos;
memcpy4(RING_BUF+fillpos, temp_sound_buffer, SAMPLES_TO_BYTES(r));
fillpos = 0;
n -= r;
memcpy4(RING_BUF, temp_sound_buffer+r, SAMPLES_TO_BYTES(n));
} else {
memcpy4(RING_BUF+fillpos, temp_sound_buffer, SAMPLES_TO_BYTES(n));
}
if((fillpos += n) >= curr_ring_buffer_samples)
fillpos = 0;
}
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