Differential D2716 Diff 9135 extern/audaspace/plugins/libsndfile/SndFileReader.h

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extern/audaspace/plugins/libsndfile/SndFileReader.h

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				/*******************************************************************************
				* Copyright 2009-2016 Jörg Müller
				*
				* Licensed under the Apache License, Version 2.0 (the "License");
				* you may not use this file except in compliance with the License.
				* You may obtain a copy of the License at
				*
				* http://www.apache.org/licenses/LICENSE-2.0
				*
				* Unless required by applicable law or agreed to in writing, software
				* distributed under the License is distributed on an "AS IS" BASIS,
				* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
				* See the License for the specific language governing permissions and
				* limitations under the License.
				******************************************************************************/

				#pragma once

				#include "IReader.h"

				#ifdef LIBSNDFILE_PLUGIN
				#define AUD_BUILD_PLUGIN
				#endif

				/**
				* @file SndFileReader.h
				* @ingroup plugin
				* The SndFileReader class.
				*/

				#include <string>
				#include <sndfile.h>
				#include <memory>

				AUD_NAMESPACE_BEGIN

				class Buffer;

				/**
				* This class reads a sound file via libsndfile.
				*/
				class AUD_PLUGIN_API SndFileReader : public IReader
				{
				private:
				/**
				* The current position in samples.
				*/
				int m_position;

				/**
				* The sample count in the file.
				*/
				int m_length;

				/**
				* Whether the file is seekable.
				*/
				bool m_seekable;

				/**
				* The specification of the audio data.
				*/
				Specs m_specs;

				/**
				* The sndfile.
				*/
				SNDFILE* m_sndfile;

				/**
				* The virtual IO structure for memory file reading.
				*/
				SF_VIRTUAL_IO m_vio;

				/**
				* The pointer to the memory file.
				*/
				std::shared_ptr<Buffer> m_membuffer;

				/**
				* The current reading pointer of the memory file.
				*/
				int m_memoffset;

				// Functions for libsndfile virtual IO functionality
				AUD_LOCAL static sf_count_t vio_get_filelen(void* user_data);
				AUD_LOCAL static sf_count_t vio_seek(sf_count_t offset, int whence, void* user_data);
				AUD_LOCAL static sf_count_t vio_read(void* ptr, sf_count_t count, void* user_data);
				AUD_LOCAL static sf_count_t vio_tell(void* user_data);

				// delete copy constructor and operator=
				SndFileReader(const SndFileReader&) = delete;
				SndFileReader& operator=(const SndFileReader&) = delete;

				public:
				/**
				* Creates a new reader.
				* \param filename The path to the file to be read.
				* \exception Exception Thrown if the file specified does not exist or
				* cannot be read with libsndfile.
				*/
				SndFileReader(std::string filename);

				/**
				* Creates a new reader.
				* \param buffer The buffer to read from.
				* \exception Exception Thrown if the buffer specified cannot be read
				* with libsndfile.
				*/
				SndFileReader(std::shared_ptr<Buffer> buffer);

				/**
				* Destroys the reader and closes the file.
				*/
				virtual ~SndFileReader();

				virtual bool isSeekable() const;
				virtual void seek(int position);
				virtual int getLength() const;
				virtual int getPosition() const;
				virtual Specs getSpecs() const;
				virtual void read(int& length, bool& eos, sample_t* buffer);
				};

				AUD_NAMESPACE_END