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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 PCM
{
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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