mirror of
https://github.com/libretro/scummvm.git
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142 lines
3.0 KiB
C++
142 lines
3.0 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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/*
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* This code is based on original Soltys source code
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* Copyright (c) 1994-1995 Janus B. Wisniewski and L.K. Avalon
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*/
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#ifndef __CGE_WAV__
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#define __CGE_WAV__
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#include "cge/general.h"
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namespace CGE {
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#define WAVE_FORMAT_PCM 0x0001
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#define IBM_FORMAT_MULAW 0x0101
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#define IBM_FORMAT_ALAW 0x0102
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#define IBM_FORMAT_ADPCM 0x0103
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typedef char FourCC[4]; // Four-character code
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class ChunkId { // Chunk type identifier
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union {
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FourCC _tx;
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uint32 _id;
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};
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protected:
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static XFile *ckFile;
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public:
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ChunkId(FourCC t) {
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memcpy(_tx, t, sizeof(_tx));
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}
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ChunkId(uint32 d) {
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_id = d;
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}
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ChunkId(XFile *xf) {
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(ckFile = xf)->read(_tx, sizeof(_tx));
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}
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bool operator !=(ChunkId &X) {
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return _id != X._id;
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}
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bool operator ==(ChunkId &X) {
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return _id == X._id;
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}
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const char *name();
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};
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class CkHea : public ChunkId {
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protected:
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uint32 _ckSize; // Chunk size field (size of ckData)
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public:
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CkHea(XFile *xf) : ChunkId(xf) {
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XRead(xf, &_ckSize);
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}
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CkHea(char id[]) : ChunkId(id), _ckSize(0) { }
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void skip();
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uint32 size() {
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return _ckSize;
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}
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};
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class FmtCk : public CkHea {
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struct Wav {
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uint16 _wFormatTag; // Format category
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uint16 _wChannels; // Number of channels
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uint32 _dwSamplesPerSec; // Sampling rate
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uint32 _dwAvgBytesPerSec; // For buffer estimation
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uint16 _wBlockAlign; // Data block size
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} _wav;
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union {
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struct {
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uint16 _wBitsPerSample; // Sample size
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} _pcm;
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};
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public:
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FmtCk(CkHea &hea);
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inline uint16 channels() {
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return _wav._wChannels;
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}
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inline uint32 smplRate() {
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return _wav._dwSamplesPerSec;
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}
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inline uint32 byteRate() {
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return _wav._dwAvgBytesPerSec;
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}
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inline uint16 blckSize() {
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return _wav._wBlockAlign;
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}
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inline uint16 smplSize() {
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return _pcm._wBitsPerSample;
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}
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};
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class DataCk : public CkHea {
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bool _e;
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uint8 *_buf;
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public:
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DataCk(CkHea &hea);
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DataCk(int first, int last);
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~DataCk();
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inline uint8 *addr() {
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return _buf;
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}
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};
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extern ChunkId _riff;
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extern ChunkId _wave;
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extern ChunkId _fmt;
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extern ChunkId _data;
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DataCk *loadWave(XFile *file);
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} // End of namespace CGE
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#endif
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