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Diffstat (limited to 'audio/decoders/3do.h')
| -rw-r--r-- | audio/decoders/3do.h | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/audio/decoders/3do.h b/audio/decoders/3do.h new file mode 100644 index 0000000000..7524358543 --- /dev/null +++ b/audio/decoders/3do.h @@ -0,0 +1,158 @@ +/* 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/substream.h" + +#include "audio/audiostream.h" +#include "audio/decoders/raw.h" + +namespace Common { +class SeekableReadStream; +} + +namespace Audio { + +class SeekableAudioStream; + +// 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 |