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/*
* Copyright (C) 2005-2018 Team Kodi
* This file is part of Kodi - https://kodi.tv
*
* SPDX-License-Identifier: GPL-2.0-or-later
* See LICENSES/README.md for more information.
*/
#pragma once
#include "cores/AudioEngine/Utils/AEAudioFormat.h"
#include "filesystem/File.h"
#include "music/tags/MusicInfoTag.h"
#include <string>
#define READ_EOF -1
#define READ_SUCCESS 0
#define READ_ERROR 1
class CFileItem;
class ICodec
{
public:
ICodec()
{
m_TotalTime = 0;
m_bitRate = 0;
m_bitsPerSample = 0;
m_bitsPerCodedSample = 0;
};
virtual ~ICodec() = default;
// Virtual functions that all codecs should implement. Note that these may need
// enhancing and or refactoring at a later date. It works currently well for MP3 and
// APE codecs.
// Init(filename)
// This routine should handle any initialization necessary. At a minimum it needs to:
// 1. Load any dlls and make sure any buffers etc. are allocated.
// 2. Load the file (or at least attempt to load it)
// 3. Fill in the m_TotalTime, m_SampleRate, m_BitsPerSample and m_Channels parameters.
virtual bool Init(const CFileItem &file, unsigned int filecache)=0;
virtual bool CanSeek() {return true;}
// Seek()
// Should seek to the appropriate time (in ms) in the file, and return the
// time to which we managed to seek (in the case where seeking is problematic)
// This is used in FFwd/Rewd so can be called very often.
virtual bool Seek(int64_t iSeekTime)=0;
// ReadPCM()
// Decodes audio into pBuffer up to size bytes. The actual amount of returned data
// is given in actualsize. Returns READ_SUCCESS on success. Returns READ_EOF when
// the data has been exhausted, and READ_ERROR on error.
virtual int ReadPCM(uint8_t* pBuffer, size_t size, size_t* actualsize) = 0;
virtual int ReadRaw(uint8_t **pBuffer, int *bufferSize) { return READ_ERROR; }
// CanInit()
// Should return true if the codec can be initialized
// eg. check if a dll needed for the codec exists
virtual bool CanInit()=0;
// set the total time - useful when info comes from a preset tag
virtual void SetTotalTime(int64_t totaltime) {}
virtual bool IsCaching() const {return false;}
virtual int GetCacheLevel() const {return -1;}
int64_t m_TotalTime; // time in ms
int m_bitRate;
int m_bitsPerSample;
int m_bitsPerCodedSample;
std::string m_CodecName;
MUSIC_INFO::CMusicInfoTag m_tag;
XFILE::CFile m_file;
AEAudioFormat m_format;
};
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