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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 SCUMM_SMUSH_CHANNEL_H
#define SCUMM_SMUSH_CHANNEL_H
#include "common/util.h"
namespace Common {
class SeekableReadStream;
}
namespace Scumm {
class SmushChannel {
protected:
int32 _track; ///< the track number
byte *_tbuffer; ///< data temporary buffer
int32 _tbufferSize; ///< temporary buffer size
byte *_sbuffer; ///< sound buffer
int32 _sbufferSize; ///< sound buffer size
int32 _dataSize; ///< remaining size of sound data in the iMUS buffer
bool _inData;
int32 _volume;
int32 _pan;
void processBuffer();
virtual bool handleSubTags(int32 &offset) = 0;
public:
SmushChannel(int32 track);
virtual ~SmushChannel();
virtual bool appendData(Common::SeekableReadStream &b, int32 size) = 0;
virtual bool setParameters(int32, int32, int32, int32, int32) = 0;
virtual bool checkParameters(int32, int32, int32, int32, int32) = 0;
virtual bool isTerminated() const = 0;
virtual byte *getSoundData() = 0;
virtual int32 getRate() = 0;
virtual bool getParameters(bool &stereo, bool &is_16bit, int32 &vol, int32 &pan) = 0;
int32 getAvailableSoundDataSize() const { return _sbufferSize; }
int32 getTrackIdentifier() const { return _track; }
};
class SaudChannel : public SmushChannel {
private:
int32 _nbframes;
bool _markReached;
int32 _flags;
int32 _index;
bool _keepSize;
protected:
bool handleSubTags(int32 &offset);
public:
SaudChannel(int32 track);
bool isTerminated() const;
bool setParameters(int32 duration, int32 flags, int32 vol1, int32 vol2, int32 index);
bool checkParameters(int32 index, int32 duration, int32 flags, int32 vol1, int32 vol2);
bool appendData(Common::SeekableReadStream &b, int32 size);
byte *getSoundData();
int32 getRate() { return 22050; }
bool getParameters(bool &stereo, bool &is_16bit, int32 &vol, int32 &pan) {
stereo = false;
is_16bit = false;
vol = _volume;
pan = _pan;
return true;
}
};
class ImuseChannel : public SmushChannel {
private:
int32 _srbufferSize;
int32 _bitsize; ///< the bitsize of the original data
int32 _rate; ///< the sampling rate of the original data
int32 _channels; ///< the number of channels of the original data
protected:
void decode();
bool handleMap(byte *data);
bool handleSubTags(int32 &offset);
public:
ImuseChannel(int32 track);
bool isTerminated() const;
bool setParameters(int32 nbframes, int32 size, int32 track_flags, int32 unk1, int32);
bool checkParameters(int32 index, int32 nbframes, int32 size, int32 track_flags, int32 unk1);
bool appendData(Common::SeekableReadStream &b, int32 size);
byte *getSoundData();
int32 getRate() { return _rate; }
bool getParameters(bool &stereo, bool &is_16bit, int32 &vol, int32 &pan) {
stereo = (_channels == 2);
is_16bit = (_bitsize > 8);
vol = _volume;
pan = _pan;
return true;
}
};
} // End of namespace Scumm
#endif
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