mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-15 22:28:10 +00:00
88 lines
2.3 KiB
C++
88 lines
2.3 KiB
C++
/* 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 <common/scummsys.h>
|
|
#include <common/stdafx.h>
|
|
#include <common/engine.h>
|
|
#include "dc.h"
|
|
|
|
EXTERN_C void *memcpy4(void *s1, const void *s2, unsigned int n);
|
|
|
|
void initSound()
|
|
{
|
|
stop_sound();
|
|
do_sound_command(CMD_SET_FREQ_EXP(FREQ_44100_EXP));
|
|
do_sound_command(CMD_SET_BUFFER(3));
|
|
}
|
|
|
|
bool OSystem_Dreamcast::set_sound_proc(void *param, SoundProc *proc,
|
|
byte format)
|
|
{
|
|
#if SAMPLE_MODE == 0
|
|
assert(format == SOUND_16BIT);
|
|
#elif SAMPLE_MODE == 1
|
|
assert(format == SOUND_8BIT);
|
|
#else
|
|
#error Invalid SAMPLE_MODE
|
|
#endif
|
|
_sound_proc_param = param;
|
|
_sound_proc = proc;
|
|
|
|
return true;
|
|
}
|
|
|
|
void OSystem_Dreamcast::checkSound()
|
|
{
|
|
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;
|
|
|
|
_sound_proc(_sound_proc_param, (byte*)temp_sound_buffer,
|
|
SAMPLES_TO_BYTES(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;
|
|
}
|