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/* ScummVM - Scumm Interpreter
* Copyright (C) 2002-2003 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 "common/util.h"
#include "smush_mixer.h"
#include "channel.h"
#include "sound/mixer.h"
#include "scumm/scumm.h"
#include "scumm/sound.h"
#include "scumm/imuse.h"
SmushMixer::SmushMixer(SoundMixer *m) :
_mixer(m),
_nextIndex(_mixer->_beginSlots),
_soundFrequency(22050) {
for(int32 i = _mixer->_beginSlots; i < SoundMixer::NUM_CHANNELS; i++) {
_channels[i].id = -1;
_channels[i].chan = NULL;
_channels[i].first = true;
}
}
SmushMixer::~SmushMixer() {
}
SmushChannel *SmushMixer::findChannel(int32 track) {
debug(9, "SmushMixer::findChannel(%d)", track);
for(int32 i = _mixer->_beginSlots; i < SoundMixer::NUM_CHANNELS; i++) {
if(_channels[i].id == track)
return _channels[i].chan;
}
return NULL;
}
bool SmushMixer::addChannel(SmushChannel *c) {
int32 track = c->getTrackIdentifier();
int i;
debug(9, "SmushMixer::addChannel(%d)", track);
for(i = _mixer->_beginSlots; i < SoundMixer::NUM_CHANNELS; i++) {
if(_channels[i].id == track)
warning("SmushMixer::addChannel(%d) : channel already exists", track);
}
if(_nextIndex >= SoundMixer::NUM_CHANNELS)
_nextIndex = _mixer->_beginSlots;
for(i = _nextIndex; i < SoundMixer::NUM_CHANNELS; i++) {
if(_channels[i].chan == NULL || _channels[i].id == -1) {
_channels[i].chan = c;
_channels[i].id = track;
_channels[i].first = true;
_nextIndex = i + 1;
return true;
}
}
for(i = _mixer->_beginSlots; i < _nextIndex; i++) {
if(_channels[i].chan == NULL || _channels[i].id == -1) {
_channels[i].chan = c;
_channels[i].id = track;
_channels[i].first = true;
_nextIndex = i + 1;
return true;
}
}
warning("_nextIndex == %d", _nextIndex);
for(i = _mixer->_beginSlots; i < SoundMixer::NUM_CHANNELS; i++) {
warning("channel %d : %p(%d, %d) %d %d", i, (void *)_channels[i].chan,
_channels[i].chan ? _channels[i].chan->getTrackIdentifier() : -1,
_channels[i].chan ? _channels[i].chan->isTerminated() : 1,
_channels[i].first, _channels[i].mixer_index);
}
error("SmushMixer::add_channel() : no more channel available");
return false;
}
bool SmushMixer::handleFrame() {
debug(9, "SmushMixer::handleFrame()");
for(int i = _mixer->_beginSlots; i < SoundMixer::NUM_CHANNELS; i++) {
if(_channels[i].id != -1) {
if(_channels[i].chan->isTerminated()) {
delete _channels[i].chan;
_channels[i].id = -1;
_channels[i].chan = NULL;
} else {
int32 rate;
bool stereo, is_short;
_channels[i].chan->getParameters(rate, stereo, is_short);
int32 size = _channels[i].chan->availableSoundData();
int32 flags = stereo ? SoundMixer::FLAG_STEREO : 0;
if(is_short) {
short *data = new int16[size * (stereo ? 2 : 1) * 2];
_channels[i].chan->getSoundData(data, size);
if(_channels[i].chan->getRate() == 11025) size *= 2;
size *= stereo ? 4 : 2;
if(_silentMixer == false) {
if(_channels[i].first) {
_channels[i].mixer_index = _mixer->playStream(NULL, -1, data, size, rate, flags | SoundMixer::FLAG_16BITS);
_channels[i].first = false;
} else {
_mixer->append(_channels[i].mixer_index, data, size, rate, flags | SoundMixer::FLAG_16BITS);
}
}
delete []data;
} else {
int8 *data = new int8[size * (stereo ? 2 : 1) * 2];
_channels[i].chan->getSoundData(data, size);
if(_channels[i].chan->getRate() == 11025) size *= 2;
size *= stereo ? 2 : 1;
if(_silentMixer == false) {
if(_channels[i].first) {
_channels[i].mixer_index = _mixer->playStream(NULL, -1, data, size, rate, flags | SoundMixer::FLAG_UNSIGNED);
_channels[i].first = false;
} else {
_mixer->append(_channels[i].mixer_index, data, size, rate, flags | SoundMixer::FLAG_UNSIGNED);
}
}
delete []data;
}
}
}
}
return true;
}
bool SmushMixer::stop() {
debug(9, "SmushMixer::stop()");
for(int i = _mixer->_beginSlots; i < SoundMixer::NUM_CHANNELS; i++) {
if(_channels[i].id != -1) {
delete _channels[i].chan;
_channels[i].id = -1;
_channels[i].chan = NULL;
}
}
return true;
}
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