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118 lines
2.6 KiB
C++
118 lines
2.6 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 VCRUISE_SAMPLELOOP_H
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#define VCRUISE_SAMPLELOOP_H
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#include "common/ptr.h"
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#include "common/mutex.h"
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#include "audio/audiostream.h"
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namespace Common {
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class ReadStream;
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} // End of namespace Common
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namespace VCruise {
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struct SampleLoop {
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SampleLoop();
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bool read(Common::ReadStream &stream, uint &availableBytes);
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uint32 identifier;
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uint32 type;
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uint32 start;
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uint32 end;
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uint32 fraction;
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uint32 playCount;
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};
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struct SampleChunk {
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SampleChunk();
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bool read(Common::ReadStream &stream, uint &availableBytes);
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uint32 manufacturer;
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uint32 product;
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uint32 samplePeriod;
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uint32 midiUnityNote;
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uint32 midiPitchFraction;
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uint32 smpteFormat;
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uint32 smpteOffset;
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// uint32 numSampleLoops;
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// uint32 sizeOfSamplerData;
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Common::Array<SampleLoop> loops;
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Common::Array<byte> samplerData;
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};
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struct SoundLoopInfo {
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SampleChunk _sampleChunk;
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static Common::SharedPtr<SoundLoopInfo> readFromWaveFile(Common::SeekableReadStream &stream);
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};
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class SampleLoopAudioStream : public Audio::AudioStream {
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public:
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SampleLoopAudioStream(Audio::SeekableAudioStream *baseStream, const SoundLoopInfo *loopInfo);
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virtual ~SampleLoopAudioStream();
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void stopLooping();
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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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private:
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struct LoopRange {
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LoopRange();
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Audio::Timestamp _restartTimestamp;
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uint _startSampleInclusive;
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uint _endSampleExclusive;
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uint _playCount;
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};
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Common::Mutex _mutex;
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int _currentSampleOffset;
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int _currentLoop;
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uint _currentLoopIteration;
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int _streamFrames;
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int _streamSamples;
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bool _terminated;
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bool _ignoreLoops;
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Common::Array<LoopRange> _loopRanges;
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Audio::SeekableAudioStream *_baseStream;
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};
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} // End of namespace VCruise
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#endif
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