DSF2FLAC
dsf_file_reader.h
00001 /*
00002  * dsf2flac - http://code.google.com/p/dsf2flac/
00003  * 
00004  * A file conversion tool for translating dsf dsd audio files into
00005  * flac pcm audio files.
00006  *
00007  * Copyright (c) 2013 by respective authors.
00008  *
00009  * This program is free software; you can redistribute it and/or modify
00010  * it under the terms of the GNU General Public License as published by
00011  * the Free Software Foundation; either version 2 of the License, or
00012  * (at your option) any later version.
00013  *
00014  * This program is distributed in the hope that it will be useful,
00015  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00016  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00017  * GNU General Public License for more details.
00018  *
00019  * You should have received a copy of the GNU General Public License
00020  * along with this program; if not, write to the Free Software
00021  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00022  *
00023  * 
00024  * Acknowledgements
00025  * 
00026  * Many thanks to the following authors and projects whose work has greatly
00027  * helped the development of this tool.
00028  * 
00029  * 
00030  * Sebastian Gesemann - dsd2pcm (http://code.google.com/p/dsd2pcm/)
00031  * SACD Ripper (http://code.google.com/p/sacd-ripper/)
00032  * Maxim V.Anisiutkin - foo_input_sacd (http://sourceforge.net/projects/sacddecoder/files/)
00033  * Vladislav Goncharov - foo_input_sacd_hq (http://vladgsound.wordpress.com)
00034  * Jesus R - www.sonore.us
00035  * 
00036  */
00037  
00038  /*
00039   * dsf_file_reader.h
00040   * 
00041   * Header file for the class dsfFileReader.
00042   * 
00043   * This class extends dsdSampleReader providing acces to dsd samples and other info
00044   * from dsf files.
00045   * 
00046   * Some of the rarer features of dsf are not well tested due to a lack of files:
00047   * dsd64
00048   * 8bit dsd
00049   * 
00050   */
00051 
00052 #ifndef DSFFILEREADER_H
00053 #define DSFFILEREADER_H
00054 
00055 #include "dsd_sample_reader.h" // Base class: dsdSampleReader
00056 #include "fstream_plus.h"
00057 
00058 class dsfFileReader : public DsdSampleReader
00059 {
00060 public:
00061         // constructor and destructor
00062         dsfFileReader(char* filePath);
00063         virtual ~dsfFileReader();
00064 public:
00065         // methods overriding dsdSampleReader
00066         bool step();
00067         void rewind();
00068         dsf2flac_int64 getLength() {return sampleCount;};
00069         dsf2flac_uint32 getNumChannels() {return chanNum;};
00070         dsf2flac_uint32 getSamplingFreq() {return samplingFreq;};
00071         bool msbIsPlayedFirst() { return true;}
00072         bool samplesAvailable() { return !file.eof() && DsdSampleReader::samplesAvailable(); }; // false when no more samples left
00073         ID3_Tag getID3Tag(dsf2flac_uint32 trackNum) {return metadata;}
00074 public:
00075         // other public methods
00076         void dispFileInfo();
00077 private:
00078         // private variables
00079         char* filePath;
00080         fstreamPlus file;
00081         // below store file info
00082         dsf2flac_uint64 fileSz;
00083         dsf2flac_uint64 metaChunkPointer;
00084         dsf2flac_uint64 sampleDataPointer;
00085         dsf2flac_uint64 dataChunkSz;
00086         dsf2flac_uint32 formatVer;
00087         dsf2flac_uint32 formatID;
00088         dsf2flac_uint32 chanType;
00089         dsf2flac_uint32 chanNum;
00090         dsf2flac_uint32 samplingFreq;
00091         dsf2flac_uint64 sampleCount; //per channel
00092         dsf2flac_uint32 blockSzPerChan;
00093         ID3_Tag metadata;
00094         // vars to hold the data and mark position
00095         dsf2flac_uint8** blockBuffer; // used to store blocks of raw data from the file
00096         dsf2flac_int64 blockCounter; // stores the index to the current blockBuffer
00097         dsf2flac_int64 blockMarker; // stores the current position in the blockBuffer
00098         // private methods
00099         void allocateBlockBuffer();
00100         bool readHeaders();
00101         void readMetadata();
00102         bool readNextBlock();
00103         static bool checkIdent(dsf2flac_int8* a, dsf2flac_int8* b); // MUST be used with the char[4]s or you'll get segfaults!
00104 };
00105 
00106 #endif // DSFFILEREADER_H
 All Classes Files Functions Variables