mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-24 18:56:33 +00:00
172 lines
4.7 KiB
C++
172 lines
4.7 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#include "common/util.h"
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#include "scumm/smush/smush_mixer.h"
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#include "scumm/smush/channel.h"
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#include "scumm/scumm.h"
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#include "scumm/sound.h"
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#include "scumm/imuse/imuse.h"
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#include "audio/mixer.h"
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#include "audio/decoders/raw.h"
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namespace Scumm {
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SmushMixer::SmushMixer(Audio::Mixer *m) :
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_mixer(m),
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_soundFrequency(22050) {
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for (int32 i = 0; i < NUM_CHANNELS; i++) {
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_channels[i].id = -1;
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_channels[i].chan = NULL;
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_channels[i].stream = NULL;
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}
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}
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SmushMixer::~SmushMixer() {
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for (int32 i = 0; i < NUM_CHANNELS; i++) {
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_mixer->stopHandle(_channels[i].handle);
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}
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}
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SmushChannel *SmushMixer::findChannel(int32 track) {
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debugC(DEBUG_SMUSH, "SmushMixer::findChannel(%d)", track);
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for (int32 i = 0; i < NUM_CHANNELS; i++) {
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if (_channels[i].id == track)
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return _channels[i].chan;
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}
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return NULL;
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}
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void SmushMixer::addChannel(SmushChannel *c) {
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int32 track = c->getTrackIdentifier();
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int i;
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debugC(DEBUG_SMUSH, "SmushMixer::addChannel(%d)", track);
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for (i = 0; i < NUM_CHANNELS; i++) {
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if (_channels[i].id == track)
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debugC(DEBUG_SMUSH, "SmushMixer::addChannel(%d): channel already exists", track);
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}
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for (i = 0; i < NUM_CHANNELS; i++) {
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if ((_channels[i].chan == NULL || _channels[i].id == -1) && !_mixer->isSoundHandleActive(_channels[i].handle)) {
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_channels[i].chan = c;
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_channels[i].id = track;
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return;
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}
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}
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for (i = 0; i < NUM_CHANNELS; i++) {
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debugC(DEBUG_SMUSH, "channel %d : %p(%d, %d)", i, (void *)_channels[i].chan,
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_channels[i].chan ? _channels[i].chan->getTrackIdentifier() : -1,
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_channels[i].chan ? _channels[i].chan->isTerminated() : 1);
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}
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error("SmushMixer::addChannel(%d): no channel available", track);
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}
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bool SmushMixer::handleFrame() {
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debugC(DEBUG_SMUSH, "SmushMixer::handleFrame()");
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for (int i = 0; i < NUM_CHANNELS; i++) {
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if (_channels[i].id != -1) {
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if (_channels[i].chan->isTerminated()) {
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delete _channels[i].chan;
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_channels[i].id = -1;
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_channels[i].chan = NULL;
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if (_channels[i].stream) {
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_channels[i].stream->finish();
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_channels[i].stream = 0;
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}
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} else {
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int32 vol, pan;
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bool stereo, is_16bit;
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_channels[i].chan->getParameters(stereo, is_16bit, vol, pan);
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// Grab the audio data from the channel
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int32 size = _channels[i].chan->getAvailableSoundDataSize();
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byte *data = _channels[i].chan->getSoundData();
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byte flags = stereo ? Audio::FLAG_STEREO : 0;
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if (is_16bit) {
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flags |= Audio::FLAG_16BITS;
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} else {
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flags |= Audio::FLAG_UNSIGNED;
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}
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if (_mixer->isReady()) {
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// Stream the data
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if (!_channels[i].stream) {
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_channels[i].stream = Audio::makeQueuingAudioStream(_channels[i].chan->getRate(), stereo);
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_mixer->playStream(Audio::Mixer::kSFXSoundType, &_channels[i].handle, _channels[i].stream);
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}
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_mixer->setChannelVolume(_channels[i].handle, vol);
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_mixer->setChannelBalance(_channels[i].handle, pan);
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_channels[i].stream->queueBuffer(data, size, DisposeAfterUse::YES, flags); // The stream will free the buffer for us
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} else
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delete[] data;
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}
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}
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}
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return true;
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}
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bool SmushMixer::stop() {
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debugC(DEBUG_SMUSH, "SmushMixer::stop()");
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for (int i = 0; i < NUM_CHANNELS; i++) {
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if (_channels[i].id != -1) {
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delete _channels[i].chan;
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_channels[i].id = -1;
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_channels[i].chan = NULL;
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if (_channels[i].stream) {
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_channels[i].stream->finish();
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_channels[i].stream = NULL;
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}
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}
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}
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return true;
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}
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bool SmushMixer::flush() {
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debugC(DEBUG_SMUSH, "SmushMixer::flush()");
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for (int i = 0; i < NUM_CHANNELS; i++) {
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if (_channels[i].id != -1) {
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if (_channels[i].stream->endOfStream()) {
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_mixer->stopHandle(_channels[i].handle);
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delete _channels[i].chan;
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_channels[i].id = -1;
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_channels[i].chan = NULL;
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_channels[i].stream = NULL;
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}
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}
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}
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return true;
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}
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} // End of namespace Scumm
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