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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.
*
*/
/*
* This code is based on original Soltys source code
* Copyright (c) 1994-1995 Janus B. Wisniewski and L.K. Avalon
*/
#ifndef __CGE_WAV__
#define __CGE_WAV__
#include "cge/general.h"
namespace CGE {
#define WAVE_FORMAT_PCM 0x0001
#define IBM_FORMAT_MULAW 0x0101
#define IBM_FORMAT_ALAW 0x0102
#define IBM_FORMAT_ADPCM 0x0103
typedef char FourCC[4]; // Four-character code
class ChunkId { // Chunk type identifier
union {
FourCC _tx;
uint32 _id;
};
protected:
static XFile *ckFile;
public:
ChunkId(FourCC t) {
memcpy(_tx, t, sizeof(_tx));
}
ChunkId(uint32 d) {
_id = d;
}
ChunkId(XFile *xf) {
(ckFile = xf)->read(_tx, sizeof(_tx));
}
bool operator !=(ChunkId &X) {
return _id != X._id;
}
bool operator ==(ChunkId &X) {
return _id == X._id;
}
const char *name();
};
class CkHea : public ChunkId {
protected:
uint32 _ckSize; // Chunk size field (size of ckData)
public:
CkHea(XFile *xf) : ChunkId(xf) {
XRead(xf, &_ckSize);
}
CkHea(char id[]) : ChunkId(id), _ckSize(0) { }
void skip();
uint32 size() {
return _ckSize;
}
};
class FmtCk : public CkHea {
struct Wav {
uint16 _wFormatTag; // Format category
uint16 _wChannels; // Number of channels
uint32 _dwSamplesPerSec; // Sampling rate
uint32 _dwAvgBytesPerSec; // For buffer estimation
uint16 _wBlockAlign; // Data block size
} _wav;
union {
struct {
uint16 _wBitsPerSample; // Sample size
} _pcm;
};
public:
FmtCk(CkHea &hea);
inline uint16 channels() {
return _wav._wChannels;
}
inline uint32 smplRate() {
return _wav._dwSamplesPerSec;
}
inline uint32 byteRate() {
return _wav._dwAvgBytesPerSec;
}
inline uint16 blckSize() {
return _wav._wBlockAlign;
}
inline uint16 smplSize() {
return _pcm._wBitsPerSample;
}
};
class DataCk : public CkHea {
bool _e;
union {
uint8 *_buf;
Ems *_eBuf;
};
public:
DataCk(CkHea &hea);
DataCk(CkHea &hea, Emm *emm);
DataCk(int first, int last);
~DataCk();
inline uint8 *addr() {
return _buf;
}
inline Ems *eAddr() {
return _eBuf;
}
};
extern ChunkId _riff;
extern ChunkId _wave;
extern ChunkId _fmt;
extern ChunkId _data;
DataCk *loadWave(XFile *file, Emm *emm = NULL);
} // End of namespace CGE
#endif
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