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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 "kyra/sound/sound_digital_mr.h"
#include "kyra/resource/resource.h"
#include "kyra/engine/kyra_mr.h"
#include "audio/audiostream.h"
#include "audio/decoders/mp3.h"
#include "audio/decoders/vorbis.h"
#include "audio/decoders/flac.h"
#include "common/util.h"
namespace Kyra {
class KyraAudioStream : public Audio::SeekableAudioStream {
public:
KyraAudioStream(Audio::SeekableAudioStream *impl) : _impl(impl), _rate(impl->getRate()), _fadeSamples(0), _fadeCount(0), _fading(0), _endOfData(false) {}
~KyraAudioStream() { delete _impl; _impl = 0; }
int readBuffer(int16 *buffer, const int numSamples);
bool isStereo() const { return _impl->isStereo(); }
bool endOfData() const { return _impl->endOfData() | _endOfData; }
int getRate() const { return _rate; }
void setRate(int newRate) { _rate = newRate; }
void beginFadeOut(uint32 millis);
bool seek(const Audio::Timestamp &where) { return _impl->seek(where); }
Audio::Timestamp getLength() const { return _impl->getLength(); }
private:
Audio::SeekableAudioStream *_impl;
int _rate;
int32 _fadeSamples;
int32 _fadeCount;
int _fading;
bool _endOfData;
};
void KyraAudioStream::beginFadeOut(uint32 millis) {
_fadeSamples = (millis * getRate()) / 1000;
if (_fading == 0)
_fadeCount = _fadeSamples;
_fading = -1;
}
int KyraAudioStream::readBuffer(int16 *buffer, const int numSamples) {
int samplesRead = _impl->readBuffer(buffer, numSamples);
if (_fading) {
int samplesProcessed = 0;
for (; samplesProcessed < samplesRead; ++samplesProcessed) {
// To help avoid overflows for long fade times, we divide both
// _fadeSamples and _fadeCount when calculating the new sample.
int32 div = _fadeSamples / 256;
if (_fading) {
*buffer = (*buffer * (_fadeCount / 256)) / div;
++buffer;
_fadeCount += _fading;
if (_fadeCount < 0) {
_fadeCount = 0;
_endOfData = true;
} else if (_fadeCount > _fadeSamples) {
_fadeCount = _fadeSamples;
_fading = 0;
}
}
}
if (_endOfData) {
memset(buffer, 0, (samplesRead - samplesProcessed) * sizeof(int16));
samplesRead = samplesProcessed;
}
}
return samplesRead;
}
SoundDigital_MR::SoundDigital_MR(KyraEngine_MR *vm, Audio::Mixer *mixer) : _vm(vm), _mixer(mixer) {
for (uint i = 0; i < ARRAYSIZE(_sounds); ++i)
_sounds[i].stream = 0;
}
SoundDigital_MR::~SoundDigital_MR() {
for (int i = 0; i < ARRAYSIZE(_sounds); ++i)
stopSound(i);
}
int SoundDigital_MR::playSound(const char *filename, uint8 priority, Audio::Mixer::SoundType type, int volume, bool loop, int channel) {
Sound *use = 0;
if (channel != -1 && channel < ARRAYSIZE(_sounds)) {
stopSound(channel);
use = &_sounds[channel];
} else {
for (channel = 0; !use && channel < ARRAYSIZE(_sounds); ++channel) {
if (!isPlaying(channel)) {
stopSound(channel);
use = &_sounds[channel];
break;
}
}
for (channel = 0; !use && channel < ARRAYSIZE(_sounds); ++channel) {
if (strcmp(_sounds[channel].filename, filename) == 0) {
stopSound(channel);
use = &_sounds[channel];
break;
}
}
for (channel = 0; !use && channel < ARRAYSIZE(_sounds); ++channel) {
if (_sounds[channel].priority <= priority) {
stopSound(channel);
use = &_sounds[channel];
break;
}
}
if (!use) {
warning("no free sound channel");
return -1;
}
}
Common::SeekableReadStream *stream = 0;
int usedCodec = -1;
for (int i = 0; _supportedCodecs[i].fileext; ++i) {
Common::String file = filename;
file += _supportedCodecs[i].fileext;
if (!_vm->resource()->exists(file.c_str()))
continue;
stream = _vm->resource()->createReadStream(file);
usedCodec = i;
}
if (!stream) {
warning("Couldn't find soundfile '%s'", filename);
return -1;
}
Common::strlcpy(use->filename, filename, sizeof(use->filename));
use->priority = priority;
debugC(5, kDebugLevelSound, "playSound: \"%s\"", use->filename);
Audio::SeekableAudioStream *audioStream = _supportedCodecs[usedCodec].streamFunc(stream, DisposeAfterUse::YES);
if (!audioStream) {
warning("Couldn't create audio stream for file '%s'", filename);
return -1;
}
use->stream = new KyraAudioStream(audioStream);
assert(use->stream);
if (use->stream->endOfData()) {
delete use->stream;
use->stream = 0;
return -1;
}
if (volume > 255)
volume = 255;
volume = (volume * Audio::Mixer::kMaxChannelVolume) / 255;
if (type == Audio::Mixer::kSpeechSoundType && _vm->heliumMode())
use->stream->setRate(32765);
_mixer->playStream(type, &use->handle, makeLoopingAudioStream(use->stream, loop ? 0 : 1), -1, volume);
return use - _sounds;
}
bool SoundDigital_MR::isPlaying(int channel) {
if (channel == -1)
return false;
assert(channel >= 0 && channel < ARRAYSIZE(_sounds));
if (!_sounds[channel].stream)
return false;
return _mixer->isSoundHandleActive(_sounds[channel].handle);
}
void SoundDigital_MR::stopSound(int channel) {
if (channel == -1)
return;
assert(channel >= 0 && channel < ARRAYSIZE(_sounds));
_mixer->stopHandle(_sounds[channel].handle);
_sounds[channel].stream = 0;
}
void SoundDigital_MR::stopAllSounds() {
for (int i = 0; i < ARRAYSIZE(_sounds); ++i) {
if (isPlaying(i))
stopSound(i);
}
}
void SoundDigital_MR::beginFadeOut(int channel, int ticks) {
if (isPlaying(channel))
_sounds[channel].stream->beginFadeOut(ticks * _vm->tickLength());
}
// static res
Audio::SeekableAudioStream *makeAUDStream(Common::SeekableReadStream *stream, DisposeAfterUse::Flag disposeAfterUse);
const SoundDigital_MR::AudioCodecs SoundDigital_MR::_supportedCodecs[] = {
#ifdef USE_FLAC
{ ".FLA", Audio::makeFLACStream },
#endif // USE_FLAC
#ifdef USE_VORBIS
{ ".OGG", Audio::makeVorbisStream },
#endif // USE_VORBIS
#ifdef USE_MAD
{ ".MP3", Audio::makeMP3Stream },
#endif // USE_MAD
{ ".AUD", makeAUDStream },
{ 0, 0 }
};
} // End of namespace Kyra
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