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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.
*
*/
#ifndef TINSEL_ADPCM_H
#define TINSEL_ADPCM_H
#include "audio/decoders/adpcm_intern.h"
namespace Tinsel {
class Tinsel_ADPCMStream : public Audio::ADPCMStream {
protected:
struct {
// Tinsel
double predictor;
double K0, K1;
double d0, d1;
} _status;
void reset() {
ADPCMStream::reset();
memset(&_status, 0, sizeof(_status));
}
int16 decodeTinsel(int16, double);
void readBufferTinselHeader();
public:
Tinsel_ADPCMStream(Common::SeekableReadStream *stream, DisposeAfterUse::Flag disposeAfterUse, uint32 size, int rate, int channels, uint32 blockAlign)
: ADPCMStream(stream, disposeAfterUse, size, rate, channels, blockAlign) {
if (blockAlign == 0)
error("Tinsel_ADPCMStream(): blockAlign isn't specified");
if (channels != 1)
error("Tinsel_ADPCMStream(): Tinsel ADPCM only supports mono");
memset(&_status, 0, sizeof(_status));
}
};
class Tinsel4_ADPCMStream : public Tinsel_ADPCMStream {
public:
Tinsel4_ADPCMStream(Common::SeekableReadStream *stream, DisposeAfterUse::Flag disposeAfterUse, uint32 size, int rate, int channels, uint32 blockAlign)
: Tinsel_ADPCMStream(stream, disposeAfterUse, size, rate, channels, blockAlign) {}
virtual int readBuffer(int16 *buffer, const int numSamples);
};
class Tinsel6_ADPCMStream : public Tinsel_ADPCMStream {
protected:
uint8 _chunkPos;
uint16 _chunkData;
void reset() {
ADPCMStream::reset();
_chunkPos = 0;
_chunkData = 0;
}
public:
Tinsel6_ADPCMStream(Common::SeekableReadStream *stream, DisposeAfterUse::Flag disposeAfterUse, uint32 size, int rate, int channels, uint32 blockAlign)
: Tinsel_ADPCMStream(stream, disposeAfterUse, size, rate, channels, blockAlign) {
_chunkPos = 0;
_chunkData = 0;
}
virtual int readBuffer(int16 *buffer, const int numSamples);
};
class Tinsel8_ADPCMStream : public Tinsel_ADPCMStream {
public:
Tinsel8_ADPCMStream(Common::SeekableReadStream *stream, DisposeAfterUse::Flag disposeAfterUse, uint32 size, int rate, int channels, uint32 blockAlign)
: Tinsel_ADPCMStream(stream, disposeAfterUse, size, rate, channels, blockAlign) {}
virtual int readBuffer(int16 *buffer, const int numSamples);
};
} // End of namespace Tinsel
#endif
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