mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-25 03:07:06 +00:00
033ff78ae9
svn-id: r12176
186 lines
4.8 KiB
C++
186 lines
4.8 KiB
C++
/* ScummVM - Scumm Interpreter
|
|
* Copyright (C) 2001 Ludvig Strigeus
|
|
* Copyright (C) 2001-2004 The ScummVM project
|
|
*
|
|
* 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/player_mod.h"
|
|
#include "sound/audiostream.h"
|
|
#include "sound/mixer.h"
|
|
#include "sound/rate.h"
|
|
|
|
namespace Scumm {
|
|
|
|
Player_MOD::Player_MOD(ScummEngine *scumm) {
|
|
int i;
|
|
_mixer = scumm->_mixer;
|
|
_samplerate = scumm->_system->property(OSystem::PROP_GET_SAMPLE_RATE, 0);
|
|
_mixamt = 0;
|
|
_mixpos = 0;
|
|
|
|
for (i = 0; i < MOD_MAXCHANS; i++) {
|
|
_channels[i].id = 0;
|
|
_channels[i].vol = 0;
|
|
_channels[i].freq = 0;
|
|
_channels[i].converter = NULL;
|
|
_channels[i].input = NULL;
|
|
}
|
|
|
|
_playproc = NULL;
|
|
_playparam = NULL;
|
|
|
|
_mixer->setupPremix(premix_proc, this);
|
|
}
|
|
|
|
Player_MOD::~Player_MOD() {
|
|
// Detach the premix callback handler
|
|
_mixer->setupPremix(0, 0);
|
|
for (int i = 0; i < MOD_MAXCHANS; i++) {
|
|
if (!_channels[i].id)
|
|
continue;
|
|
delete _channels[i].converter;
|
|
delete _channels[i].input;
|
|
}
|
|
}
|
|
|
|
void Player_MOD::setMasterVolume(int vol) {
|
|
_maxvol = vol;
|
|
}
|
|
|
|
void Player_MOD::setUpdateProc(ModUpdateProc *proc, void *param, int freq) {
|
|
_playproc = proc;
|
|
_playparam = param;
|
|
_mixamt = _samplerate / freq;
|
|
}
|
|
void Player_MOD::clearUpdateProc() {
|
|
_playproc = NULL;
|
|
_playparam = NULL;
|
|
_mixamt = 0;
|
|
}
|
|
|
|
void Player_MOD::startChannel(int id, void *data, int size, int rate, uint8 vol, int loopStart, int loopEnd, int8 pan) {
|
|
int i;
|
|
if (id == 0)
|
|
error("player_mod - attempted to start channel id 0");
|
|
|
|
for (i = 0; i < MOD_MAXCHANS; i++) {
|
|
if (!_channels[i].id)
|
|
break;
|
|
}
|
|
if (i == MOD_MAXCHANS) {
|
|
warning("player_mod - too many music channels playing (%i max)",MOD_MAXCHANS);
|
|
return;
|
|
}
|
|
_channels[i].id = id;
|
|
_channels[i].vol = vol;
|
|
_channels[i].pan = pan;
|
|
_channels[i].freq = rate;
|
|
_channels[i].input = makeLinearInputStream(rate, SoundMixer::FLAG_AUTOFREE | (loopStart != loopEnd ? SoundMixer::FLAG_LOOP : 0), (const byte*)data, size, loopStart, loopEnd - loopStart);
|
|
_channels[i].converter = makeRateConverter(rate, _mixer->getOutputRate(), false, false);
|
|
}
|
|
|
|
void Player_MOD::stopChannel(int id) {
|
|
if (id == 0)
|
|
error("player_mod - attempted to stop channel id 0");
|
|
for (int i = 0; i < MOD_MAXCHANS; i++) {
|
|
if (_channels[i].id == id) {
|
|
delete _channels[i].converter;
|
|
_channels[i].converter = NULL;
|
|
delete _channels[i].input;
|
|
_channels[i].input = NULL;
|
|
_channels[i].id = 0;
|
|
_channels[i].vol = 0;
|
|
_channels[i].freq = 0;
|
|
}
|
|
}
|
|
}
|
|
void Player_MOD::setChannelVol(int id, uint8 vol) {
|
|
if (id == 0)
|
|
error("player_mod - attempted to set volume for channel id 0");
|
|
for (int i = 0; i < MOD_MAXCHANS; i++) {
|
|
if (_channels[i].id == id) {
|
|
_channels[i].vol = vol;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void Player_MOD::setChannelPan(int id, int8 pan) {
|
|
if (id == 0)
|
|
error("player_mod - attempted to set pan for channel id 0");
|
|
for (int i = 0; i < MOD_MAXCHANS; i++) {
|
|
if (_channels[i].id == id) {
|
|
_channels[i].pan = pan;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void Player_MOD::setChannelFreq(int id, int freq) {
|
|
if (id == 0)
|
|
error("player_mod - attempted to set frequency for channel id 0");
|
|
for (int i = 0; i < MOD_MAXCHANS; i++) {
|
|
if (_channels[i].id == id) {
|
|
_channels[i].freq = freq;
|
|
delete _channels[i].converter;
|
|
_channels[i].converter = makeRateConverter(freq, _mixer->getOutputRate(), false, false);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void Player_MOD::premix_proc(void *param, int16 *buf, uint len) {
|
|
((Player_MOD *) param)->do_mix(buf, len);
|
|
}
|
|
|
|
void Player_MOD::do_mix (int16 *data, uint len) {
|
|
int i;
|
|
int dpos = 0;
|
|
uint dlen = 0;
|
|
memset(data, 0, 2 * len * sizeof(int16));
|
|
while (len) {
|
|
if (_playproc) {
|
|
dlen = _mixamt - _mixpos;
|
|
if (!_mixpos)
|
|
_playproc(_playparam);
|
|
if (dlen <= len) {
|
|
_mixpos = 0;
|
|
len -= dlen;
|
|
} else {
|
|
_mixpos = _mixamt - len;
|
|
dlen = len;
|
|
len = 0;
|
|
}
|
|
} else {
|
|
dlen = len;
|
|
len = 0;
|
|
}
|
|
for (i = 0; i < MOD_MAXCHANS; i++)
|
|
if (_channels[i].id) {
|
|
st_volume_t vol_l = (127 - _channels[i].pan) * _channels[i].vol / 127;
|
|
st_volume_t vol_r = (127 + _channels[i].pan) * _channels[i].vol / 127;
|
|
_channels[i].converter->flow(*_channels[i].input, &data[dpos*2], dlen, vol_l, vol_r);
|
|
}
|
|
dpos += dlen;
|
|
}
|
|
}
|
|
|
|
} // End of namespace Scumm
|