mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-15 22:28:10 +00:00
152 lines
5.0 KiB
C++
152 lines
5.0 KiB
C++
/* 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
|