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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 __WAV__
#define __WAV__
#include "cge/general.h"
#include <string.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
typedef uint32 CKSIZE; // 32-bit unsigned size
class CKID { // Chunk type identifier
union {
FOURCC Tx;
uint32 Id;
};
protected:
static XFILE *ckFile;
public:
CKID(FOURCC t) {
memcpy(Tx, t, sizeof(Tx));
}
CKID(uint32 d) {
Id = d;
}
CKID(XFILE *xf) {
(ckFile = xf)->Read(Tx, sizeof(Tx));
}
bool operator !=(CKID &X) {
return Id != X.Id;
}
bool operator ==(CKID &X) {
return Id == X.Id;
}
const char *Name(void);
};
class CKHEA : public CKID {
protected:
CKSIZE ckSize; // Chunk size field (size of ckData)
public:
CKHEA(XFILE *xf) : CKID(xf) {
XRead(xf, &ckSize);
}
CKHEA(char id[]) : CKID(id), ckSize(0) { }
void Skip(void);
CKSIZE Size(void) {
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(void) {
return Wav.wChannels;
}
inline uint32 SmplRate(void) {
return Wav.dwSamplesPerSec;
}
inline uint32 ByteRate(void) {
return Wav.dwAvgBytesPerSec;
}
inline uint16 BlckSize(void) {
return Wav.wBlockAlign;
}
inline uint16 SmplSize(void) {
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(void);
inline uint8 *Addr(void) {
return Buf;
}
inline EMS *EAddr(void) {
return EBuf;
}
};
extern CKID RIFF;
extern CKID WAVE;
extern CKID FMT;
extern CKID DATA;
DATACK *LoadWave(XFILE *file, EMM *emm = NULL);
} // End of namespace CGE
#endif
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