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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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef VCRUISE_SAMPLELOOP_H
#define VCRUISE_SAMPLELOOP_H
#include "common/ptr.h"
#include "common/mutex.h"
#include "audio/audiostream.h"
namespace Common {
class ReadStream;
} // End of namespace Common
namespace VCruise {
struct SampleLoop {
SampleLoop();
bool read(Common::ReadStream &stream, uint &availableBytes);
uint32 identifier;
uint32 type;
uint32 start;
uint32 end;
uint32 fraction;
uint32 playCount;
};
struct SampleChunk {
SampleChunk();
bool read(Common::ReadStream &stream, uint &availableBytes);
uint32 manufacturer;
uint32 product;
uint32 samplePeriod;
uint32 midiUnityNote;
uint32 midiPitchFraction;
uint32 smpteFormat;
uint32 smpteOffset;
// uint32 numSampleLoops;
// uint32 sizeOfSamplerData;
Common::Array<SampleLoop> loops;
Common::Array<byte> samplerData;
};
struct SoundLoopInfo {
SampleChunk _sampleChunk;
static Common::SharedPtr<SoundLoopInfo> readFromWaveFile(Common::SeekableReadStream &stream);
};
class SampleLoopAudioStream : public Audio::AudioStream {
public:
SampleLoopAudioStream(Audio::SeekableAudioStream *baseStream, const SoundLoopInfo *loopInfo);
virtual ~SampleLoopAudioStream();
void stopLooping();
int readBuffer(int16 *buffer, const int numSamples) override;
bool isStereo() const override;
int getRate() const override;
bool endOfData() const override;
private:
struct LoopRange {
LoopRange();
Audio::Timestamp _restartTimestamp;
uint _startSampleInclusive;
uint _endSampleExclusive;
uint _playCount;
};
Common::Mutex _mutex;
int _currentSampleOffset;
int _currentLoop;
uint _currentLoopIteration;
int _streamFrames;
int _streamSamples;
bool _terminated;
bool _ignoreLoops;
Common::Array<LoopRange> _loopRanges;
Audio::SeekableAudioStream *_baseStream;
};
} // End of namespace VCruise
#endif
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