144 lines
3.3 KiB
C++
144 lines
3.3 KiB
C++
/* DecMPA - simple MPEG Audio decoding library.
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Copyright (C) 2002 Hauke Duden
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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For more information look at the file License.txt in this package.
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email: hazard_hd@users.sourceforge.net
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*/
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//This file is a heavily modified version of SPlayPlugin.h from the original
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//mpeglib. See Readme.txt for details.
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#ifndef _MPADECODER_H_
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#define _MPADECODER_H_
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#include "../include/decmpa.h"
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#include "DecMPAFileAccess.h"
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#include "frame/pcmFrame.h"
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#include "frame/floatFrame.h"
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#include "MPAFrameFinder.h"
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#include "MPAInfo.h"
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class CMPADecoder
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{
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public:
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CMPADecoder(const DecMPA_Callbacks& Callbacks,void* pCallbackContext);
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~CMPADecoder();
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int Decode(void* pBuffer,long nBufferBytes,long& nBytesDecoded);
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int DecodeNoData(long& nDecodedBytes);
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int SeekToTime(long Millis);
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int GetTime(long& Time);
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int GetDuration(long& Duration);
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bool OutputFormatChanged();
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void GetOutputFormat(DecMPA_OutputFormat& Format);
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void GetMPEGHeader(DecMPA_MPEGHeader& Header);
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int GetID3v2Data(unsigned char*& pData,long& nDataSize);
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inline void SetDestroyNotify(void (*pNotify)(void*),void* pContext);
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long GetFilePositionFromTime(long Millis);
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int SetParam(int ID,long Value);
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long GetParam(int ID);
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protected:
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int DecodeNextFrame(bool bNoData);
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bool ReadNextFrame();
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void HandleDecodedData(AudioFrame* playFrame);
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void SetOutputFormat(AudioFrame* pNewFormatFrame);
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bool ReadDecodedData(void* pDest,long nBytes,long& nRead);
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void Flush();
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int EnsurePrepared();
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void HandleID3Tag();
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void UpdateMPEGHeader(MpegAudioHeader* pHeader);
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DecMPA_Callbacks m_Callbacks;
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void* m_pCallbackContext;
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bool m_bDoFloat;
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AudioFrame* m_pAudioFrame;
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FloatFrame* m_pFloatFrame;
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PCMFrame* m_pPCMFrame;
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AudioFrame* m_pFormatFrame;
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int m_nOutputBlockSize;
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CDecMPAFileAccess* m_pFileAccess;
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long m_nBufferBytes;
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long m_nUsedBufferBytes;
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unsigned char* m_pBuffer;
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double m_nReadTime;
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double m_nBufferStartTime;
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double m_nDecodeTime;
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DecMPA_OutputFormat m_OutputFormat;
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bool m_bOutputFormatChanged;
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DecMPA_MPEGHeader m_MPEGHeader;
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bool m_bFirstDecode;
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bool m_bPrepared;
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bool m_bHasFrame;
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int m_nResyncCounter;
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void* m_pDecodeEngine;
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CMPAFrameFinder m_FrameFinder;
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CMPAInfo m_Info;
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bool m_bStoreID3v2;
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unsigned char* m_pID3v2Data;
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long m_nID3v2DataSize;
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void (*m_pDestroyNotify)(void*);
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void* m_pDestroyNotifyContext;
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long m_aParams[DECMPA_PARAMCOUNT];
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bool m_bNotMPEG;
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bool m_bDecoderNeedsFlush;
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};
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inline void CMPADecoder::SetDestroyNotify(void (*pNotify)(void*),void* pContext)
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{
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m_pDestroyNotify=pNotify;
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m_pDestroyNotifyContext=pContext;
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}
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#endif
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