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Diffstat (limited to 'sound/decoders/vag.h')
-rw-r--r-- | sound/decoders/vag.h | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/sound/decoders/vag.h b/sound/decoders/vag.h new file mode 100644 index 0000000000..d659a7db4e --- /dev/null +++ b/sound/decoders/vag.h @@ -0,0 +1,65 @@ +/* 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. + * + * $URL$ + * $Id$ + * + */ + +/** + * @file + * Sound decoder used in engines: + * - sword1 (PSX port of the game) + * - sword2 (PSX port of the game) + * - tinsel (PSX port of the game) + */ + +#ifndef SOUND_VAG_H +#define SOUND_VAG_H + +#include "sound/audiostream.h" +#include "common/stream.h" + +namespace Audio { + +class VagStream : public Audio::RewindableAudioStream { +public: + VagStream(Common::SeekableReadStream *stream, int rate = 11025); + ~VagStream(); + + bool isStereo() const { return false; } + bool endOfData() const { return _stream->pos() == _stream->size(); } + int getRate() const { return _rate; } + int readBuffer(int16 *buffer, const int numSamples); + + bool rewind(); +private: + Common::SeekableReadStream *_stream; + + byte _predictor; + double _samples[28]; + byte _samplesRemaining; + int _rate; + double _s1, _s2; +}; + +} // End of namespace Sword1 + +#endif |