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/* ScummVM - Scumm Interpreter
* Copyright (C) 2004 Ivan Dubrov
* Copyright (C) 2004-2005 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.
*
* $Header$
*
*/
#include "gob/gob.h"
#include "gob/global.h"
#include "gob/sound.h"
namespace Gob {
void Snd::SquareWaveStream::playNote(int freq, int32 ms, uint rate) {
_rate = rate;
_periodLength = _rate / (2 * freq);
_periodSamples = 0;
_sampleValue = 6000;
if (ms == -1) {
_remainingSamples = 1;
_beepForever = true;
} else {
_remainingSamples = (_rate * ms) / 1000;
_beepForever = false;
}
}
int Snd::SquareWaveStream::readBuffer(int16 *buffer, const int numSamples) {
int samples = 0;
while (samples < numSamples && _remainingSamples > 0) {
*buffer++ = _sampleValue;
if (_periodSamples++ > _periodLength) {
_periodSamples = 0;
_sampleValue = -_sampleValue;
}
samples++;
if (!_beepForever)
_remainingSamples--;
}
return samples;
}
Snd::Snd(GobEngine *vm) : _vm(vm) {
//CleanupFuncPtr cleanupFunc;// = &snd_cleanupFuncCallback();
_cleanupFunc = 0;
for (int i = 0; i < ARRAYSIZE(_loopingSounds); i++)
_loopingSounds[i] = NULL;
_playingSound = 0;
}
void Snd::loopSounds(void) {
for (int i = 0; i < ARRAYSIZE(_loopingSounds); i++) {
SoundDesc *snd = _loopingSounds[i];
if (snd && !_vm->_mixer->isSoundHandleActive(snd->handle)) {
if (snd->repCount-- > 0) {
_vm->_mixer->playRaw(&snd->handle, snd->data, snd->size, snd->frequency, 0);
} else {
_loopingSounds[i] = NULL;
}
}
}
}
void Snd::setBlasterPort(int16 port) {return;}
void Snd::speakerOn(int16 frequency, int32 length) {
_speakerStream.playNote(frequency, length, _vm->_mixer->getOutputRate());
if (!_vm->_mixer->isSoundHandleActive(_speakerHandle)) {
_vm->_mixer->playInputStream(Audio::Mixer::kSFXSoundType, &_speakerHandle, &_speakerStream, -1, 255, 0, false);
}
}
void Snd::speakerOff(void) {
_vm->_mixer->stopHandle(_speakerHandle);
}
void Snd::playSample(Snd::SoundDesc *sndDesc, int16 repCount, int16 frequency) {
assert(frequency > 0);
if (!_vm->_mixer->isSoundHandleActive(sndDesc->handle)) {
_vm->_mixer->playRaw(&sndDesc->handle, sndDesc->data, sndDesc->size, frequency, 0);
}
sndDesc->repCount = repCount - 1;
sndDesc->frequency = frequency;
if (repCount > 1) {
for (int i = 0; i < ARRAYSIZE(_loopingSounds); i++) {
if (!_loopingSounds[i]) {
_loopingSounds[i] = sndDesc;
return;
}
}
warning("Looping sounds list is full");
}
}
void Snd::writeAdlib(int16 port, int16 data) {
return;
}
Snd::SoundDesc *Snd::loadSoundData(const char *path) {
Snd::SoundDesc *sndDesc;
int32 size;
size = _vm->_dataio->getDataSize(path);
sndDesc = (Snd::SoundDesc *)malloc(size);
sndDesc->size = size;
sndDesc->data = _vm->_dataio->getData(path);
return sndDesc;
}
void Snd::freeSoundData(Snd::SoundDesc *sndDesc) {
_vm->_mixer->stopHandle(sndDesc->handle);
for (int i = 0; i < ARRAYSIZE(_loopingSounds); i++) {
if (_loopingSounds[i] == sndDesc)
_loopingSounds[i] = NULL;
}
free(sndDesc->data);
free(sndDesc);
}
} // End of namespace Gob
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