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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*
*/
#include "sound/audiostream.h"
#include "gob/gob.h"
#include "gob/global.h"
#include "gob/sound.h"
namespace Gob {
// TODO: This is a very primitive square wave generator. The only thing is
// has in common with the PC speaker is that it sounds terrible.
class SquareWaveStream : public AudioStream {
private:
uint _rate;
bool _beepForever;
uint32 _periodLength;
uint32 _periodSamples;
uint32 _remainingSamples;
int16 _sampleValue;
public:
SquareWaveStream() {}
~SquareWaveStream() {}
void playNote(int freq, int32 ms);
int readBuffer(int16 *buffer, const int numSamples);
bool endOfData() const { return _remainingSamples == 0; }
bool isStereo() const { return false; }
int getRate() const { return _rate; }
};
void SquareWaveStream::playNote(int freq, int32 ms) {
_rate = _vm->_mixer->getOutputRate();
_periodLength = _rate / (2 * freq);
_periodSamples = 0;
_sampleValue = 6000;
if (ms == -1) {
_remainingSamples = 1;
_beepForever = true;
} else {
_remainingSamples = (_rate * ms) / 1000;
_beepForever = false;
}
}
int 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;
}
SquareWaveStream speakerStream;
Audio::SoundHandle speakerHandle;
Snd_SoundDesc *snd_loopingSounds[5]; // Should be enough
void snd_initSound(void) {
for (int i = 0; i < ARRAYSIZE(snd_loopingSounds); i++)
snd_loopingSounds[i] = NULL;
}
void snd_loopSounds(void) {
for (int i = 0; i < ARRAYSIZE(snd_loopingSounds); i++) {
Snd_SoundDesc *snd = 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 {
snd_loopingSounds[i] = NULL;
}
}
}
}
int16 snd_checkProAudio(void) {return 0;}
int16 snd_checkAdlib(void) {return 0;}
int16 snd_checkBlaster(void) {return 0;}
void snd_setBlasterPort(int16 port) {return;}
void snd_speakerOn(int16 frequency, int32 length) {
speakerStream.playNote(frequency, length);
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_stopSound(int16 arg){return;}
void snd_setResetTimerFlag(char flag){return;}
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(snd_loopingSounds); i++) {
if (!snd_loopingSounds[i]) {
snd_loopingSounds[i] = sndDesc;
return;
}
}
warning("Looping sounds list is full");
}
}
void snd_cleanupFuncCallback() {;}
CleanupFuncPtr (snd_cleanupFunc);
//CleanupFuncPtr snd_cleanupFunc;// = &snd_cleanupFuncCallback();
int16 snd_soundPort;
char snd_playingSound;
void snd_writeAdlib(int16 port, int16 data) {
return;
}
Snd_SoundDesc *snd_loadSoundData(const char *path) {
Snd_SoundDesc *sndDesc;
int32 size;
size = data_getDataSize(path);
sndDesc = (Snd_SoundDesc *)malloc(size);
sndDesc->size = size;
sndDesc->data = data_getData(path);
return sndDesc;
}
void snd_freeSoundData(Snd_SoundDesc *sndDesc) {
_vm->_mixer->stopHandle(sndDesc->handle);
for (int i = 0; i < ARRAYSIZE(snd_loopingSounds); i++) {
if (snd_loopingSounds[i] == sndDesc)
snd_loopingSounds[i] = NULL;
}
free(sndDesc->data);
free(sndDesc);
}
void snd_playComposition(Snd_SoundDesc ** samples, int16 *composit, int16 freqVal) {;}
void snd_waitEndPlay(void) {;}
} // End of namespace Gob
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