99 lines
2.8 KiB
C++
99 lines
2.8 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 modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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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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*
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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, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef SCI_SOUND_DECODERS_SOL_H
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#define SCI_SOUND_DECODERS_SOL_H
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#include "audio/audiostream.h"
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#include "common/stream.h"
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namespace Sci {
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enum SOLFlags {
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kCompressed = 1,
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k16Bit = 4,
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kStereo = 16
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};
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template <bool STEREO, bool S16BIT, bool OLDDPCM8>
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class SOLStream : public Audio::SeekableAudioStream {
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private:
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/**
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* Read stream containing possibly-compressed SOL audio.
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*/
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Common::DisposablePtr<Common::SeekableReadStream> _stream;
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/**
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* Sample rate of audio data.
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*/
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uint16 _sampleRate;
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/**
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* The raw (possibly-compressed) size of audio data in the stream.
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*/
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int32 _rawDataSize;
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/**
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* DPCM8 pop (overflow) fix working data:
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* - Whether or not the fix is enabled, set once on construction.
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* - The current state of the repair (0 = inactive, 1 = positive, 2 = negative).
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* - The sample state without repair, to detect where repairing should stop.
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*/
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struct PopFixData {
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const bool enabled;
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uint8 state;
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uint8 preRepairSample;
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PopFixData(const bool e):
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enabled(e), state(0), preRepairSample(0) {}
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} _popfixDPCM8;
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/**
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* The last sample from the previous DPCM decode.
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*/
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union {
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struct { int16 l; int16 r; } _dpcmCarry16;
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struct { uint8 l; uint8 r; } _dpcmCarry8;
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};
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/**
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* The calculated length of the stream.
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*/
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Audio::Timestamp _length;
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bool seek(const Audio::Timestamp &where) override;
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Audio::Timestamp getLength() const override;
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int readBuffer(int16 *buffer, const int numSamples) override;
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bool isStereo() const override;
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int getRate() const override;
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bool endOfData() const override;
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bool rewind() override;
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public:
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SOLStream(Common::SeekableReadStream *stream, const DisposeAfterUse::Flag disposeAfterUse, const uint16 sampleRate, const int32 rawDataSize);
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};
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Audio::SeekableAudioStream *makeSOLStream(Common::SeekableReadStream *stream, DisposeAfterUse::Flag disposeAfterUse);
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} // End of namespace Sci
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#endif // SCI_SOUND_DECODERS_SOL_H
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