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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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.
*
*/
#include "mohawk/myst_sound.h"
#include "mohawk/myst.h"
#include "mohawk/resource.h"
#include "mohawk/sound.h"
#include "common/debug.h"
#include "audio/audiostream.h"
#include "audio/decoders/wave.h"
namespace Mohawk {
MystSound::MystSound(MohawkEngine_Myst *vm) :
_vm(vm),
_effectId(0),
_speechSamplesPerSecond(0),
_backgroundId(0) {
}
MystSound::~MystSound() {
stopEffect();
stopBackground();
}
Audio::RewindableAudioStream *MystSound::makeAudioStream(uint16 id, CueList *cueList) {
if (_vm->isGameVariant(GF_ME))
return Audio::makeWAVStream(_vm->getResource(ID_MSND, convertMystID(id)), DisposeAfterUse::YES);
else
return makeMohawkWaveStream(_vm->getResource(ID_MSND, id), cueList);
}
void MystSound::playEffect(uint16 id, bool loop) {
debug (0, "Replacing sound %d", id);
// The original engine also forces looping for those sounds
switch (id) {
case 2205:
case 2207:
case 5378:
case 7220:
case 9119: // Elevator engine sound in mechanical age is looping.
case 9120:
case 9327:
loop = true;
break;
default:
break;
}
stopEffect();
Audio::RewindableAudioStream *rewindStream = makeAudioStream(id);
if (!rewindStream) {
warning("Unable to open sound '%d'", id);
return;
}
_effectId = id;
// Set the stream to loop here if it's requested
Audio::AudioStream *audStream = rewindStream;
if (loop)
audStream = Audio::makeLoopingAudioStream(rewindStream, 0);
_vm->_mixer->playStream(Audio::Mixer::kSFXSoundType, &_effectHandle, audStream);
}
void MystSound::stopEffect() {
_vm->_mixer->stopHandle(_effectHandle);
_effectId = 0;
_effectHandle = Audio::SoundHandle();
}
bool MystSound::isEffectPlaying() {
return _vm->_mixer->isSoundHandleActive(_effectHandle);
}
uint MystSound::getSpeechNumSamplesPlayed() {
if (isSpeechPlaying()) {
return (_vm->_mixer->getSoundElapsedTime(_speechHandle) * _speechSamplesPerSecond) / 1000;
}
return 0;
}
uint16 MystSound::convertMystID(uint16 id) {
// Myst ME is a bit more efficient with sound storage than Myst
// Myst has lots of sounds repeated. To overcome this, Myst ME
// has MJMP resources which provide a link to the actual MSND
// resource we're looking for. This saves a lot of space from
// repeated data.
if (_vm->hasResource(ID_MJMP, id)) {
Common::SeekableReadStream *mjmpStream = _vm->getResource(ID_MJMP, id);
id = mjmpStream->readUint16LE();
delete mjmpStream;
}
return id;
}
void MystSound::playBackground(uint16 id, uint16 volume) {
debug(0, "Replacing background sound with %d", id);
stopEffect();
Common::String name = _vm->getResourceName(ID_MSND, convertMystID(id));
// Only the first eight characters need to be the same to have a match
Common::String prefix;
if (name.size() >= 8)
prefix = Common::String(name.c_str(), name.c_str() + 8);
else
prefix = name;
// Check if sound is already playing
if (_vm->_mixer->isSoundHandleActive(_backgroundHandle)
&& _vm->getResourceName(ID_MSND, convertMystID(_backgroundId)).hasPrefix(prefix)) {
// The sound is already playing, just change the volume
changeBackgroundVolume(volume);
return;
}
// Stop old background sound
stopBackground();
// Play new sound
Audio::RewindableAudioStream *rewindStream = makeAudioStream(id);
if (rewindStream) {
_backgroundId = id;
// Set the stream to loop
Audio::AudioStream *audStream = Audio::makeLoopingAudioStream(rewindStream, 0);
_vm->_mixer->playStream(Audio::Mixer::kMusicSoundType, &_backgroundHandle, audStream, -1, volume >> 8);
}
}
void MystSound::stopBackground() {
_vm->_mixer->stopHandle(_backgroundHandle);
_backgroundId = 0;
_backgroundHandle = Audio::SoundHandle();
}
void MystSound::pauseBackground() {
_vm->_mixer->pauseHandle(_backgroundHandle, true);
}
void MystSound::resumeBackground() {
stopEffect();
_vm->_mixer->pauseHandle(_backgroundHandle, false);
}
void MystSound::changeBackgroundVolume(uint16 volume) {
_vm->_mixer->setChannelVolume(_backgroundHandle, volume >> 8);
}
void MystSound::playSpeech(uint16 id, CueList *cueList) {
debug (0, "Playing speech %d", id);
Audio::RewindableAudioStream *rewindStream = makeAudioStream(id, cueList);
if (!rewindStream) {
warning("Unable to open sound '%d'", id);
return;
}
_speechSamplesPerSecond = rewindStream->getRate();
_vm->_mixer->playStream(Audio::Mixer::kSpeechSoundType, &_speechHandle, rewindStream);
}
bool MystSound::isSpeechPlaying() {
return _vm->_mixer->isSoundHandleActive(_speechHandle);
}
void MystSound::stopSpeech() {
_vm->_mixer->stopHandle(_speechHandle);
_speechHandle = Audio::SoundHandle();
_speechSamplesPerSecond = 0;
}
} // End of namespace Mohawk
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