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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.
*
*/
/**
* @file
* Sound decoder used in engines:
* - sherlock (3DO version of Serrated Scalpel)
*/
#ifndef AUDIO_3DO_SDX2_H
#define AUDIO_3DO_SDX2_H
#include "common/scummsys.h"
#include "common/types.h"
#include "common/stream.h"
#include "audio/audiostream.h"
namespace Audio {
// amount of bytes to be used within the decoder classes as buffers
#define AUDIO_3DO_CACHE_SIZE 1024
// persistent spaces
struct audio_3DO_ADP4_PersistentSpace {
int16 lastSample;
int16 stepIndex;
};
struct audio_3DO_SDX2_PersistentSpace {
int16 lastSample1;
int16 lastSample2;
};
class Audio3DO_ADP4_Stream : public RewindableAudioStream {
public:
Audio3DO_ADP4_Stream(Common::SeekableReadStream *stream, uint16 sampleRate, bool stereo, DisposeAfterUse::Flag disposeAfterUse, audio_3DO_ADP4_PersistentSpace *persistentSpace);
protected:
const uint16 _sampleRate;
const bool _stereo;
Common::DisposablePtr<Common::SeekableReadStream> _stream;
int32 _streamBytesLeft;
void reset();
bool rewind();
bool endOfData() const { return (_stream->pos() >= _stream->size()); }
bool isStereo() const { return _stereo; }
int getRate() const { return _sampleRate; }
int readBuffer(int16 *buffer, const int numSamples);
bool _initialRead;
audio_3DO_ADP4_PersistentSpace *_callerDecoderData;
audio_3DO_ADP4_PersistentSpace _initialDecoderData;
audio_3DO_ADP4_PersistentSpace _curDecoderData;
private:
int16 decodeSample(byte compressedNibble);
};
class Audio3DO_SDX2_Stream : public RewindableAudioStream {
public:
Audio3DO_SDX2_Stream(Common::SeekableReadStream *stream, uint16 sampleRate, bool stereo, DisposeAfterUse::Flag disposeAfterUse, audio_3DO_SDX2_PersistentSpace *persistentSpacePtr);
protected:
const uint16 _sampleRate;
const bool _stereo;
Common::DisposablePtr<Common::SeekableReadStream> _stream;
int32 _streamBytesLeft;
void reset();
bool rewind();
bool endOfData() const { return (_stream->pos() >= _stream->size()); }
bool isStereo() const { return _stereo; }
int getRate() const { return _sampleRate; }
int readBuffer(int16 *buffer, const int numSamples);
bool _initialRead;
audio_3DO_SDX2_PersistentSpace *_callerDecoderData;
audio_3DO_SDX2_PersistentSpace _initialDecoderData;
audio_3DO_SDX2_PersistentSpace _curDecoderData;
};
/**
* Try to decode 3DO ADP4 data from the given seekable stream and create a SeekableAudioStream
* from that data.
*
* @param stream the SeekableReadStream from which to read the 3DO SDX2 data
* @sampleRate sample rate
* @stereo if it's stereo or mono
* @audioLengthMSecsPtr pointer to a uint32 variable, that is supposed to get the length of the audio in milliseconds
* @disposeAfterUse disposeAfterUse whether to delete the stream after use
* @persistentSpacePtr pointer to the persistent space structure
* @return a new SeekableAudioStream, or NULL, if an error occurred
*/
RewindableAudioStream *make3DO_ADP4AudioStream(
Common::SeekableReadStream *stream,
uint16 sampleRate,
bool stereo,
uint32 *audioLengthMSecsPtr = NULL, // returns the audio length in milliseconds
DisposeAfterUse::Flag disposeAfterUse = DisposeAfterUse::YES,
audio_3DO_ADP4_PersistentSpace *persistentSpacePtr = NULL
);
/**
* Try to decode 3DO SDX2 data from the given seekable stream and create a SeekableAudioStream
* from that data.
*
* @param stream the SeekableReadStream from which to read the 3DO SDX2 data
* @sampleRate sample rate
* @stereo if it's stereo or mono
* @audioLengthMSecsPtr pointer to a uint32 variable, that is supposed to get the length of the audio in milliseconds
* @disposeAfterUse disposeAfterUse whether to delete the stream after use
* @persistentSpacePtr pointer to the persistent space structure
* @return a new SeekableAudioStream, or NULL, if an error occurred
*/
RewindableAudioStream *make3DO_SDX2AudioStream(
Common::SeekableReadStream *stream,
uint16 sampleRate,
bool stereo,
uint32 *audioLengthMSecsPtr = NULL, // returns the audio length in milliseconds
DisposeAfterUse::Flag disposeAfterUse = DisposeAfterUse::YES,
audio_3DO_SDX2_PersistentSpace *persistentSpacePtr = NULL
);
} // End of namespace Audio
#endif
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