openspades/Sources/Core/WavAudioStream.h

/*
 Copyright (c) 2013 yvt
 
 This file is part of OpenSpades.
 
 OpenSpades 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.
 
 OpenSpades 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 OpenSpades.  If not, see <http://www.gnu.org/licenses/>.
 
 */

#include "IAudioStream.h"
#include <string>
#include <map>

namespace spades {
	class WavAudioStream: public IAudioStream {
		struct RiffChunkInfo {
			uint64_t dataPosition;
			std::string name;
			uint64_t length;
		};
		
		std::map<std::string, RiffChunkInfo> chunks;
		
		IStream *stream;
		bool autoClose;
		
		int channels;
		int rate;
		SampleFormat sampleFormat;
		
		const RiffChunkInfo *dataChunk;
		uint64_t startPos, endPos;
		
		RiffChunkInfo ReadChunkInfo();
		const RiffChunkInfo& GetChunk(const std::string&);
	public:
		WavAudioStream(IStream *, bool autoClose);
		virtual ~WavAudioStream();
		
		virtual uint64_t GetLength();
		virtual int GetSamplingFrequency();
		virtual SampleFormat GetSampleFormat();
		virtual int GetNumChannels();
		
		virtual int ReadByte();
		virtual size_t Read(void *, size_t bytes);
		
		virtual uint64_t GetPosition();
		virtual void SetPosition(uint64_t);
		
	};
}