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/* ScummVM - Scumm Interpreter
* Copyright (C) 2002-2006 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
#include "common/stdafx.h"
#include "common/util.h"
#include "scumm/smush/smush_mixer.h"
#include "scumm/smush/channel.h"
#include "scumm/scumm.h"
#include "scumm/sound.h"
#include "scumm/imuse/imuse.h"
#include "sound/mixer.h"
namespace Scumm {
SmushMixer::SmushMixer(Audio::Mixer *m) :
_mixer(m),
_soundFrequency(22050) {
for (int32 i = 0; i < NUM_CHANNELS; i++) {
_channels[i].id = -1;
_channels[i].chan = NULL;
_channels[i].stream = NULL;
}
}
SmushMixer::~SmushMixer() {
for (int32 i = 0; i < NUM_CHANNELS; i++) {
_mixer->stopHandle(_channels[i].handle);
}
}
SmushChannel *SmushMixer::findChannel(int32 track) {
debugC(DEBUG_SMUSH, "SmushMixer::findChannel(%d)", track);
for (int32 i = 0; i < NUM_CHANNELS; i++) {
if (_channels[i].id == track)
return _channels[i].chan;
}
return NULL;
}
void SmushMixer::addChannel(SmushChannel *c) {
int32 track = c->getTrackIdentifier();
int i;
debugC(DEBUG_SMUSH, "SmushMixer::addChannel(%d)", track);
for (i = 0; i < NUM_CHANNELS; i++) {
if (_channels[i].id == track)
debugC(DEBUG_SMUSH, "SmushMixer::addChannel(%d): channel already exists", track);
}
for (i = 0; i < NUM_CHANNELS; i++) {
if ((_channels[i].chan == NULL || _channels[i].id == -1) && !_mixer->isSoundHandleActive(_channels[i].handle)) {
_channels[i].chan = c;
_channels[i].id = track;
return;
}
}
for (i = 0; i < NUM_CHANNELS; i++) {
debugC(DEBUG_SMUSH, "channel %d : %p(%d, %d)", i, (void *)_channels[i].chan,
_channels[i].chan ? _channels[i].chan->getTrackIdentifier() : -1,
_channels[i].chan ? _channels[i].chan->isTerminated() : 1);
}
error("SmushMixer::addChannel(%d): no channel available", track);
}
bool SmushMixer::handleFrame() {
debugC(DEBUG_SMUSH, "SmushMixer::handleFrame()");
for (int i = 0; i < 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;
if (_channels[i].stream) {
_channels[i].stream->finish();
_channels[i].stream = 0;
}
} else {
int32 vol, pan;
bool stereo, is_16bit;
_channels[i].chan->getParameters(stereo, is_16bit, vol, pan);
// Grab the audio data from the channel
int32 size = _channels[i].chan->getAvailableSoundDataSize();
byte *data = _channels[i].chan->getSoundData();
byte flags = stereo ? Audio::Mixer::FLAG_STEREO : 0;
if (is_16bit) {
flags |= Audio::Mixer::FLAG_16BITS;
} else {
flags |= Audio::Mixer::FLAG_UNSIGNED;
}
if (_mixer->isReady()) {
// Stream the data
if (!_channels[i].stream) {
_channels[i].stream = Audio::makeAppendableAudioStream(_channels[i].chan->getRate(), flags);
_mixer->playInputStream(Audio::Mixer::kSFXSoundType, &_channels[i].handle, _channels[i].stream);
}
_mixer->setChannelVolume(_channels[i].handle, vol);
_mixer->setChannelBalance(_channels[i].handle, pan);
_channels[i].stream->queueBuffer(data, size); // The stream will free the buffer for us
} else
delete[] data;
}
}
}
return true;
}
bool SmushMixer::stop() {
debugC(DEBUG_SMUSH, "SmushMixer::stop()");
for (int i = 0; i < NUM_CHANNELS; i++) {
if (_channels[i].id != -1) {
delete _channels[i].chan;
_channels[i].id = -1;
_channels[i].chan = NULL;
if (_channels[i].stream) {
_channels[i].stream->finish();
_channels[i].stream = NULL;
}
}
}
return true;
}
bool SmushMixer::flush() {
debugC(DEBUG_SMUSH, "SmushMixer::flush()");
for (int i = 0; i < NUM_CHANNELS; i++) {
if (_channels[i].id != -1) {
if (_channels[i].stream->endOfStream()) {
_mixer->stopHandle(_channels[i].handle);
delete _channels[i].chan;
_channels[i].id = -1;
_channels[i].chan = NULL;
_channels[i].stream = NULL;
}
}
}
return true;
}
} // End of namespace Scumm
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