mirror of
https://github.com/libretro/scummvm.git
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148 lines
3.7 KiB
C++
148 lines
3.7 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2004 Ivan Dubrov
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* Copyright (C) 2004-2006 The ScummVM project
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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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* $URL$
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* $Id$
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*
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*/
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#include "gob/gob.h"
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#include "gob/global.h"
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#include "gob/sound.h"
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namespace Gob {
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void Snd::SquareWaveStream::playNote(int freq, int32 ms, uint rate) {
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_rate = rate;
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_periodLength = _rate / (2 * freq);
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_periodSamples = 0;
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_sampleValue = 6000;
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if (ms == -1) {
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_remainingSamples = 1;
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_beepForever = true;
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} else {
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_remainingSamples = (_rate * ms) / 1000;
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_beepForever = false;
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}
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}
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int Snd::SquareWaveStream::readBuffer(int16 *buffer, const int numSamples) {
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int samples = 0;
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while (samples < numSamples && _remainingSamples > 0) {
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*buffer++ = _sampleValue;
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if (_periodSamples++ > _periodLength) {
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_periodSamples = 0;
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_sampleValue = -_sampleValue;
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}
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samples++;
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if (!_beepForever)
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_remainingSamples--;
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}
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return samples;
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}
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Snd::Snd(GobEngine *vm) : _vm(vm) {
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//CleanupFuncPtr cleanupFunc;// = &snd_cleanupFuncCallback();
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_cleanupFunc = 0;
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for (int i = 0; i < ARRAYSIZE(_loopingSounds); i++)
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_loopingSounds[i] = NULL;
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_playingSound = 0;
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}
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void Snd::loopSounds(void) {
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for (int i = 0; i < ARRAYSIZE(_loopingSounds); i++) {
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SoundDesc *snd = _loopingSounds[i];
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if (snd && !_vm->_mixer->isSoundHandleActive(snd->handle)) {
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if (snd->repCount-- > 0) {
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_vm->_mixer->playRaw(&snd->handle, snd->data, snd->size, snd->frequency, 0);
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} else {
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_loopingSounds[i] = NULL;
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}
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}
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}
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}
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void Snd::setBlasterPort(int16 port) {return;}
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void Snd::speakerOn(int16 frequency, int32 length) {
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_speakerStream.playNote(frequency, length, _vm->_mixer->getOutputRate());
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if (!_vm->_mixer->isSoundHandleActive(_speakerHandle)) {
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_vm->_mixer->playInputStream(Audio::Mixer::kSFXSoundType, &_speakerHandle, &_speakerStream, -1, 255, 0, false);
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}
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}
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void Snd::speakerOff(void) {
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_vm->_mixer->stopHandle(_speakerHandle);
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}
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void Snd::playSample(Snd::SoundDesc *sndDesc, int16 repCount, int16 frequency) {
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assert(frequency > 0);
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if (!_vm->_mixer->isSoundHandleActive(sndDesc->handle)) {
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_vm->_mixer->playRaw(&sndDesc->handle, sndDesc->data, sndDesc->size, frequency, 0);
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}
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sndDesc->repCount = repCount - 1;
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sndDesc->frequency = frequency;
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if (repCount > 1) {
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for (int i = 0; i < ARRAYSIZE(_loopingSounds); i++) {
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if (!_loopingSounds[i]) {
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_loopingSounds[i] = sndDesc;
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return;
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}
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}
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warning("Looping sounds list is full");
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}
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}
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void Snd::writeAdlib(int16 port, int16 data) {
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return;
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}
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Snd::SoundDesc *Snd::loadSoundData(const char *path) {
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Snd::SoundDesc *sndDesc;
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sndDesc = new Snd::SoundDesc;
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sndDesc->size = _vm->_dataio->getDataSize(path);
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sndDesc->data = _vm->_dataio->getData(path);
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return sndDesc;
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}
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void Snd::freeSoundDesc(Snd::SoundDesc *sndDesc, bool freedata) {
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_vm->_mixer->stopHandle(sndDesc->handle);
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for (int i = 0; i < ARRAYSIZE(_loopingSounds); i++) {
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if (_loopingSounds[i] == sndDesc)
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_loopingSounds[i] = NULL;
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}
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if (freedata) {
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delete[] sndDesc->data;
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}
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delete sndDesc;
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}
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} // End of namespace Gob
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