mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-24 18:56:33 +00:00
2c4a6d6a43
svn-id: r25411
300 lines
6.6 KiB
C++
300 lines
6.6 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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#include "gob/game.h"
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#include "gob/util.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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_cleanupFunc = 0;
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_playingSound = 0;
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_rate = _vm->_mixer->getOutputRate();
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_end = true;
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_data = 0;
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_length = 0;
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_freq = 0;
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_repCount = 0;
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_offset = 0.0;
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_frac = 0.0;
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_cur = 0;
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_last = 0;
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_fade = false;
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_fadeVol = 255.0;
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_fadeVolStep = 0.0;
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_fadeSamples = 0;
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_curFadeSamples = 0;
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_compositionSamples = 0;
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_compositionSampleTypes = 0;
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_compositionSampleCount = 0;
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_compositionPos = -1;
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_vm->_mixer->playInputStream(Audio::Mixer::kSFXSoundType, &_handle,
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this, -1, 255, 0, false, true);
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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::stopSound(int16 fadeLength)
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{
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Common::StackLock slock(_mutex);
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if (fadeLength <= 0) {
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_data = 0;
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_end = true;
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_playingSound = 0;
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return;
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}
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_fade = true;
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_fadeVol = 255.0;
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_fadeSamples = (int) (fadeLength * (((double) _rate) / 10.0));
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_fadeVolStep = 255.0 / ((double) _fadeSamples);
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_curFadeSamples = 0;
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}
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void Snd::waitEndPlay(bool interruptible, bool stopComp) {
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if (stopComp)
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_compositionPos = -1;
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while (!_end && !_vm->_quitRequested) {
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if (interruptible && (_vm->_util->checkKey() == 0x11B)) {
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WRITE_VAR(57, -1);
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return;
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}
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_vm->_util->longDelay(200);
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}
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stopSound(0);
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}
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void Snd::stopComposition(void) {
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if (_compositionPos != -1) {
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stopSound(0);
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_compositionPos = -1;
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}
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}
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void Snd::nextCompositionPos(void) {
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int8 slot;
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while ((++_compositionPos < 50) && ((slot = _composition[_compositionPos]) != -1)) {
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if ((slot >= 0) && (slot < _compositionSampleCount) &&
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(_compositionSamples[slot] != 0) && !(_compositionSampleTypes[slot] & 8)) {
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setSample(_compositionSamples[slot], 1, 0, 0);
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return;
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}
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}
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_compositionPos = -1;
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}
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void Snd::playComposition(int16 *composition, int16 freqVal, SoundDesc **sndDescs,
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int8 *sndTypes, int8 sndCount) {
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int i;
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waitEndPlay();
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stopComposition();
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_compositionSamples = sndDescs ? sndDescs : _vm->_game->_soundSamples;
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_compositionSampleTypes = sndTypes ? sndTypes : _vm->_game->_soundTypes;
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_compositionSampleCount = sndCount;
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i = -1;
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do {
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i++;
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_composition[i] = composition[i];
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} while ((i < 50) && (composition[i] != -1));
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nextCompositionPos();
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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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if (sndDesc == _curSoundDesc)
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stopSound(0);
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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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void Snd::setSample(Snd::SoundDesc *sndDesc, int16 repCount, int16 frequency, int16 fadeLength) {
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if (frequency <= 0)
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frequency = sndDesc->frequency;
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_curSoundDesc = sndDesc;
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sndDesc->repCount = repCount - 1;
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sndDesc->frequency = frequency;
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_data = (int8 *) sndDesc->data;
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_length = sndDesc->size;
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_freq = frequency;
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_ratio = ((double) _freq) / _rate;
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_offset = 0.0;
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_frac = 0;
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_last = _cur;
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_cur = _data[0];
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_repCount = repCount;
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_end = false;
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_playingSound = 1;
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_curFadeSamples = 0;
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if (fadeLength == 0) {
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_fade = false;
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_fadeVol = 255.0;
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_fadeSamples = 0;
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_fadeVolStep = 0.0;
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} else {
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_fade = true;
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_fadeVol = 0.0;
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_fadeSamples = (int) (fadeLength * (((double) _rate) / 10.0));
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_fadeVolStep = -(255.0 / ((double) _fadeSamples));
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}
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}
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void Snd::playSample(Snd::SoundDesc *sndDesc, int16 repCount, int16 frequency, int16 fadeLength) {
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Common::StackLock slock(_mutex);
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if (!_end)
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return;
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setSample(sndDesc, repCount, frequency, fadeLength);
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}
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void Snd::checkEndSample(void) {
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if (_compositionPos != -1)
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nextCompositionPos();
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else if ((_repCount == -1) || (--_repCount > 0)) {
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_offset = 0.0;
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_frac = 0.0;
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_end = false;
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_playingSound = 1;
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} else {
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_end = true;
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_playingSound = 0;
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}
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}
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int Snd::readBuffer(int16 *buffer, const int numSamples) {
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memset(buffer, 0, numSamples);
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for (int i = 0; i < numSamples; i++) {
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Common::StackLock slock(_mutex);
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if (!_data)
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return i;
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if (_end || (_offset >= _length))
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checkEndSample();
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if (_end)
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return i;
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*buffer++ = (int16) ((_last + (_cur - _last) * _frac) * _fadeVol);
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_frac += _ratio;
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_offset += _ratio;
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while ((_frac > 1) && (_offset < _length)) {
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_frac -= 1;
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_last = _cur;
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_cur = _data[(int) _offset];
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}
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if (_fade) {
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if (++_curFadeSamples >= _fadeSamples) {
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if (_fadeVolStep > 0) {
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_data = 0;
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_end = true;
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_playingSound = 0;
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_compositionPos = -1;
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} else {
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_fadeVol = 255.0;
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_fade = false;
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}
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} else
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_fadeVol -= _fadeVolStep;
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}
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}
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return numSamples;
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}
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} // End of namespace Gob
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