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393 lines
21 KiB
C++
393 lines
21 KiB
C++
/*****************************************************************************************
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Monkey's Audio MACLib.h (include for using MACLib.lib in your projects)
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Copyright (C) 2000-2002 by Matthew T. Ashland All Rights Reserved.
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Overview:
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There are two main interfaces... create one (using CreateIAPExxx) and go to town:
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IAPECompress - for creating APE files
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IAPEDecompress - for decompressing and analyzing APE files
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Note(s):
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-unless otherwise specified, functions return ERROR_SUCCESS (0) on success and an
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error code on failure.
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-the terminology "Sample" refers to a single sample value, and "Block" refers
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to a collection of "Channel" samples. For simplicity, MAC typically uses blocks
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everywhere so that channel mis-alignment cannot happen. (i.e. on a CD, a sample is
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2 bytes and a block is 4 bytes ([2 bytes / sample] * [2 channels] = 4 bytes))
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Questions / Suggestions:
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Please direct questions or comments to the Monkey's Audio developers board:
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http://www.monkeysaudio.com/cgi-bin/YaBB/YaBB.cgi -> Developers
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or, if necessary, email @ monkeysaudio.com
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*****************************************************************************************/
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#ifndef APE_MACLIB_H
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#define APE_MACLIB_H
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/*****************************************************************************************
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Defines
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*****************************************************************************************/
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#define COMPRESSION_LEVEL_FAST 1000
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#define COMPRESSION_LEVEL_NORMAL 2000
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#define COMPRESSION_LEVEL_HIGH 3000
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#define COMPRESSION_LEVEL_EXTRA_HIGH 4000
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#define COMPRESSION_LEVEL_INSANE_HIGH 5000
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#define COMPRESSION_LEVEL_BRAINDEAD_HIGH 6000
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#define MAC_FORMAT_FLAG_8_BIT 1 // is 8-bit
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#define MAC_FORMAT_FLAG_CRC 2 // uses the new CRC32 error detection
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#define MAC_FORMAT_FLAG_HAS_PEAK_LEVEL 4 // unsigned __int32 Peak_Level after the header
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#define MAC_FORMAT_FLAG_24_BIT 8 // is 24-bit
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#define MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS 16 // has the number of seek elements after the peak level
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#define MAC_FORMAT_FLAG_CREATE_WAV_HEADER 32 // create the wave header on decompression (not stored)
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#define CREATE_WAV_HEADER_ON_DECOMPRESSION -1
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#define MAX_AUDIO_BYTES_UNKNOWN -1
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typedef void (__stdcall * APE_PROGRESS_CALLBACK) (int);
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/*****************************************************************************************
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WAV header structure
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*****************************************************************************************/
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struct WAVE_HEADER
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{
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// RIFF header
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char cRIFFHeader[4];
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unsigned int nRIFFBytes;
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// data type
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char cDataTypeID[4];
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// wave format
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char cFormatHeader[4];
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unsigned int nFormatBytes;
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unsigned short nFormatTag;
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unsigned short nChannels;
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unsigned int nSamplesPerSec;
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unsigned int nAvgBytesPerSec;
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unsigned short nBlockAlign;
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unsigned short nBitsPerSample;
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// data chunk header
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char cDataHeader[4];
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unsigned int nDataBytes;
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};
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/*****************************************************************************************
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APE header structure (what's at the front of an APE file)
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*****************************************************************************************/
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#define APE_HEADER_BYTES 32
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struct APE_HEADER
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{
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char cID[4]; // should equal 'MAC '
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unsigned __int16 nVersion; // version number * 1000 (3.81 = 3810)
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unsigned __int16 nCompressionLevel; // the compression level
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unsigned __int16 nFormatFlags; // any format flags (for future use)
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unsigned __int16 nChannels; // the number of channels (1 or 2)
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unsigned __int32 nSampleRate; // the sample rate (typically 44100)
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unsigned __int32 nHeaderBytes; // the bytes after the MAC header that compose the WAV header
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unsigned __int32 nTerminatingBytes; // the bytes after that raw data (for extended info)
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unsigned __int32 nTotalFrames; // the number of frames in the file
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unsigned __int32 nFinalFrameBlocks; // the number of samples in the final frame
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};
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/*************************************************************************************************
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Classes (fully defined elsewhere)
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*************************************************************************************************/
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class CIO;
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class CInputSource;
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/*************************************************************************************************
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IAPEDecompress fields - used when querying for information
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Note(s):
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-the distinction between APE_INFO_XXXX and APE_DECOMPRESS_XXXX is that the first is querying the APE
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information engine, and the other is querying the decompressor, and since the decompressor can be
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a range of an APE file (for APL), differences will arise. Typically, use the APE_DECOMPRESS_XXXX
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fields when querying for info about the length, etc. so APL will work properly.
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(i.e. (APE_INFO_TOTAL_BLOCKS != APE_DECOMPRESS_TOTAL_BLOCKS) for APL files)
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*************************************************************************************************/
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enum APE_DECOMPRESS_FIELDS
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{
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APE_INFO_FILE_VERSION = 1000, // version of the APE file * 1000 (3.93 = 3930) [ignored, ignored]
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APE_INFO_COMPRESSION_LEVEL = 1001, // compression level of the APE file [ignored, ignored]
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APE_INFO_FORMAT_FLAGS = 1002, // format flags of the APE file [ignored, ignored]
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APE_INFO_SAMPLE_RATE = 1003, // sample rate (Hz) [ignored, ignored]
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APE_INFO_BITS_PER_SAMPLE = 1004, // bits per sample [ignored, ignored]
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APE_INFO_BYTES_PER_SAMPLE = 1005, // number of bytes per sample [ignored, ignored]
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APE_INFO_CHANNELS = 1006, // channels [ignored, ignored]
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APE_INFO_BLOCK_ALIGN = 1007, // block alignment [ignored, ignored]
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APE_INFO_BLOCKS_PER_FRAME = 1008, // number of blocks in a frame (frames are used internally) [ignored, ignored]
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APE_INFO_FINAL_FRAME_BLOCKS = 1009, // blocks in the final frame (frames are used internally) [ignored, ignored]
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APE_INFO_TOTAL_FRAMES = 1010, // total number frames (frames are used internally) [ignored, ignored]
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APE_INFO_WAV_HEADER_BYTES = 1011, // header bytes of the decompressed WAV [ignored, ignored]
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APE_INFO_WAV_TERMINATING_BYTES = 1012, // terminating bytes of the decompressed WAV [ignored, ignored]
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APE_INFO_WAV_DATA_BYTES = 1013, // data bytes of the decompressed WAV [ignored, ignored]
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APE_INFO_WAV_TOTAL_BYTES = 1014, // total bytes of the decompressed WAV [ignored, ignored]
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APE_INFO_APE_TOTAL_BYTES = 1015, // total bytes of the APE file [ignored, ignored]
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APE_INFO_TOTAL_BLOCKS = 1016, // total blocks of audio data [ignored, ignored]
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APE_INFO_LENGTH_MS = 1017, // length in ms (1 sec = 1000 ms) [ignored, ignored]
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APE_INFO_AVERAGE_BITRATE = 1018, // average bitrate of the APE [ignored, ignored]
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APE_INFO_FRAME_BITRATE = 1019, // bitrate of specified APE frame [frame index, ignored]
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APE_INFO_DECOMPRESSED_BITRATE = 1020, // bitrate of the decompressed WAV [ignored, ignored]
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APE_INFO_PEAK_LEVEL = 1021, // peak audio level (-1 is unknown) [ignored, ignored]
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APE_INFO_SEEK_BIT = 1022, // bit offset [frame index, ignored]
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APE_INFO_SEEK_BYTE = 1023, // byte offset [frame index, ignored]
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APE_INFO_WAV_HEADER_DATA = 1024, // error code [buffer *, max bytes]
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APE_INFO_WAV_TERMINATING_DATA = 1025, // error code [buffer *, max bytes]
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APE_INFO_WAVEFORMATEX = 1026, // error code [waveformatex *, ignored]
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APE_INFO_IO_SOURCE = 1027, // I/O source (CIO *) [ignored, ignored]
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APE_INFO_FRAME_BYTES = 1028, // bytes (compressed) of the frame [frame index, ignored]
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APE_INFO_FRAME_BLOCKS = 1029, // blocks in a given frame [frame index, ignored]
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APE_INFO_TAG = 1030, // point to tag (CAPETag *) [ignored, ignored]
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APE_DECOMPRESS_CURRENT_BLOCK = 2000, // current block location [ignored, ignored]
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APE_DECOMPRESS_CURRENT_MS = 2001, // current millisecond location [ignored, ignored]
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APE_DECOMPRESS_TOTAL_BLOCKS = 2002, // total blocks in the decompressors range [ignored, ignored]
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APE_DECOMPRESS_LENGTH_MS = 2003, // total blocks in the decompressors range [ignored, ignored]
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APE_DECOMPRESS_CURRENT_BITRATE = 2004, // current bitrate [ignored, ignored]
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APE_DECOMPRESS_AVERAGE_BITRATE = 2005 // average bitrate (works with ranges) [ignored, ignored]
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};
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/*************************************************************************************************
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IAPEDecompress - interface for working with existing APE files (decoding, seeking, analyzing, etc.)
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*************************************************************************************************/
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class IAPEDecompress
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{
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public:
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// destructor (needed so implementation's destructor will be called)
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virtual ~IAPEDecompress() {}
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/*********************************************************************************************
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* Decompress / Seek
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*********************************************************************************************/
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//////////////////////////////////////////////////////////////////////////////////////////////
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// GetData(...) - gets raw decompressed audio
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//
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// Parameters:
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// char * pBuffer
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// a pointer to a buffer to put the data into
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// int nBlocks
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// the number of audio blocks desired (see note at intro about blocks vs. samples)
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// int * pBlocksRetrieved
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// the number of blocks actually retrieved (could be less at end of file or on critical failure)
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//////////////////////////////////////////////////////////////////////////////////////////////
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virtual int GetData(char * pBuffer, int nBlocks, int * pBlocksRetrieved) = 0;
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//////////////////////////////////////////////////////////////////////////////////////////////
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// Seek(...) - seeks
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//
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// Parameters:
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// int nBlockOffset
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// the block to seek to (see note at intro about blocks vs. samples)
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//////////////////////////////////////////////////////////////////////////////////////////////
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virtual int Seek(int nBlockOffset) = 0;
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/*********************************************************************************************
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* Get Information
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*********************************************************************************************/
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//////////////////////////////////////////////////////////////////////////////////////////////
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// GetInfo(...) - get information about the APE file or the state of the decompressor
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//
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// Parameters:
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// APE_DECOMPRESS_FIELDS Field
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// the field we're querying (see APE_DECOMPRESS_FIELDS above for more info)
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// int nParam1
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// generic parameter... usage is listed in APE_DECOMPRESS_FIELDS
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// int nParam2
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// generic parameter... usage is listed in APE_DECOMPRESS_FIELDS
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//////////////////////////////////////////////////////////////////////////////////////////////
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virtual int GetInfo(APE_DECOMPRESS_FIELDS Field, int nParam1 = 0, int nParam2 = 0) = 0;
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};
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/*************************************************************************************************
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IAPECompress - interface for creating APE files
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Usage:
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To create an APE file, you Start(...), then add data (in a variety of ways), then Finish(...)
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*************************************************************************************************/
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class IAPECompress
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{
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public:
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// destructor (needed so implementation's destructor will be called)
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virtual ~IAPECompress() {}
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/*********************************************************************************************
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* Start
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*********************************************************************************************/
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//////////////////////////////////////////////////////////////////////////////////////////////
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// Start(...) / StartEx(...) - starts encoding
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//
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// Parameters:
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// CIO * pioOutput / const char * pFilename
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// the output... either a filename or an I/O source
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// WAVEFORMATEX * pwfeInput
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// format of the audio to encode (use FillWaveFormatEx() if necessary)
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// int nMaxAudioBytes
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// the absolute maximum audio bytes that will be encoded... encoding fails with a
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// ERROR_APE_COMPRESS_TOO_MUCH_DATA if you attempt to encode more than specified here
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// (if unknown, use MAX_AUDIO_BYTES_UNKNOWN to allocate as much storage in the seek table as
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// possible... limit is then 2 GB of data (~4 hours of CD music)... this wastes around
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// 30kb, so only do it if completely necessary)
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// int nCompressionLevel
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// the compression level for the APE file (fast - extra high)
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// (note: extra-high is much slower for little gain)
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// const unsigned char * pHeaderData
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// a pointer to a buffer containing the WAV header (data before the data block in the WAV)
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// (note: use NULL for on-the-fly encoding... see next parameter)
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// int nHeaderBytes
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// number of bytes in the header data buffer (use CREATE_WAV_HEADER_ON_DECOMPRESSION and
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// NULL for the pHeaderData and MAC will automatically create the appropriate WAV header
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// on decompression)
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//////////////////////////////////////////////////////////////////////////////////////////////
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virtual int Start(const char * pOutputFilename, const WAVEFORMATEX * pwfeInput,
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int nMaxAudioBytes = MAX_AUDIO_BYTES_UNKNOWN, int nCompressionLevel = COMPRESSION_LEVEL_NORMAL,
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const unsigned char * pHeaderData = NULL, int nHeaderBytes = CREATE_WAV_HEADER_ON_DECOMPRESSION) = 0;
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virtual int StartEx(CIO * pioOutput, const WAVEFORMATEX * pwfeInput,
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int nMaxAudioBytes = MAX_AUDIO_BYTES_UNKNOWN, int nCompressionLevel = COMPRESSION_LEVEL_NORMAL,
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const unsigned char * pHeaderData = NULL, int nHeaderBytes = CREATE_WAV_HEADER_ON_DECOMPRESSION) = 0;
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/*********************************************************************************************
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* Add / Compress Data
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* - there are 3 ways to add data:
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* 1) simple call AddData(...)
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* 2) lock MAC's buffer, copy into it, and unlock (LockBuffer(...) / UnlockBuffer(...))
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* 3) from an I/O source (AddDataFromInputSource(...))
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*********************************************************************************************/
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//////////////////////////////////////////////////////////////////////////////////////////////
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// AddData(...) - adds data to the encoder
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//
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// Parameters:
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// unsigned char * pData
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// a pointer to a buffer containing the raw audio data
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// int nBytes
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// the number of bytes in the buffer
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//////////////////////////////////////////////////////////////////////////////////////////////
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virtual int AddData(unsigned char * pData, int nBytes) = 0;
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//////////////////////////////////////////////////////////////////////////////////////////////
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// GetBufferBytesAvailable(...) - returns the number of bytes available in the buffer
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// (helpful when locking)
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//////////////////////////////////////////////////////////////////////////////////////////////
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virtual int GetBufferBytesAvailable() = 0;
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//////////////////////////////////////////////////////////////////////////////////////////////
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// LockBuffer(...) - locks MAC's buffer so we can copy into it
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//
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// Parameters:
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// int * pBytesAvailable
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// returns the number of bytes available in the buffer (DO NOT COPY MORE THAN THIS IN)
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//
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// Return:
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// pointer to the buffer (add at that location)
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//////////////////////////////////////////////////////////////////////////////////////////////
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virtual unsigned char * LockBuffer(int * pBytesAvailable) = 0;
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//////////////////////////////////////////////////////////////////////////////////////////////
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// UnlockBuffer(...) - releases the buffer
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//
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// Parameters:
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// int nBytesAdded
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// the number of bytes copied into the buffer
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// BOOL bProcess
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// whether MAC should process as much as possible of the buffer
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//////////////////////////////////////////////////////////////////////////////////////////////
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virtual int UnlockBuffer(int nBytesAdded, BOOL bProcess = TRUE) = 0;
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//////////////////////////////////////////////////////////////////////////////////////////////
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// AddDataFromInputSource(...) - use a CInputSource (input source) to add data
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//
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// Parameters:
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// CInputSource * pInputSource
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// a pointer to the input source
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// int nMaxBytes
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// the maximum number of bytes to let MAC add (-1 if MAC can add any amount)
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// int * pBytesAdded
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// returns the number of bytes added from the I/O source
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//////////////////////////////////////////////////////////////////////////////////////////////
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virtual int AddDataFromInputSource(CInputSource * pInputSource, int nMaxBytes = -1, int * pBytesAdded = NULL) = 0;
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/*********************************************************************************************
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* Finish / Kill
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*********************************************************************************************/
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//////////////////////////////////////////////////////////////////////////////////////////////
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// Finish(...) - ends encoding and finalizes the file
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//
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// Parameters:
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// unsigned char * pTerminatingData
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// a pointer to a buffer containing the information to place at the end of the APE file
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// (comprised of the WAV terminating data (data after the data block in the WAV) followed
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// by any tag information)
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// int nTerminatingBytes
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// number of bytes in the terminating data buffer
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// int nWAVTerminatingBytes
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// the number of bytes of the terminating data buffer that should be appended to a decoded
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// WAV file (it's basically nTerminatingBytes - the bytes that make up the tag)
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//////////////////////////////////////////////////////////////////////////////////////////////
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virtual int Finish(unsigned char * pTerminatingData, int nTerminatingBytes, int nWAVTerminatingBytes) = 0;
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//////////////////////////////////////////////////////////////////////////////////////////////
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// Kill(...) - stops encoding and deletes the output file
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// --- NOT CURRENTLY IMPLEMENTED ---
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//////////////////////////////////////////////////////////////////////////////////////////////
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virtual int Kill() = 0;
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};
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/*************************************************************************************************
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Functions to create the interfaces
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Usage:
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Interface creation returns a NULL pointer on failure (and fills error code if it was passed in)
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Usage example:
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int nErrorCode;
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IAPEDecompress * pAPEDecompress = CreateIAPEDecompress("c:\\1.ape", &nErrorCode);
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if (pAPEDecompress == NULL)
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{
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// failure... nErrorCode will have specific code
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}
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*************************************************************************************************/
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extern "C"
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{
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IAPEDecompress * __stdcall CreateIAPEDecompress(const char * pFilename, int * pErrorCode = NULL);
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IAPEDecompress * __stdcall CreateIAPEDecompressEx(CIO * pIO, int * pErrorCode = NULL);
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IAPECompress * __stdcall CreateIAPECompress(int * pErrorCode = NULL);
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}
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/*************************************************************************************************
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Simple functions - see the SDK sample projects for usage examples
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*************************************************************************************************/
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extern "C"
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{
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// process whole files
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DLLEXPORT int __stdcall CompressFile(const char * pInputFile, const char * pOutputFile, int nCompressionLevel = COMPRESSION_LEVEL_NORMAL, int * pPercentageDone = NULL, APE_PROGRESS_CALLBACK ProgressCallback = 0, int * pKillFlag = NULL);
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DLLEXPORT int __stdcall DecompressFile(const char * pInputFilename, const char * pOutputFilename, int * pPercentageDone, APE_PROGRESS_CALLBACK ProgressCallback, int * pKillFlag);
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DLLEXPORT int __stdcall ConvertFile(const char * pInputFilename, const char * pOutputFilename, int nCompressionLevel, int * pPercentageDone, APE_PROGRESS_CALLBACK ProgressCallback, int * pKillFlag);
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DLLEXPORT int __stdcall VerifyFile(const char * pInputFilename, int * pPercentageDone, APE_PROGRESS_CALLBACK ProgressCallback, int * pKillFlag);
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// helper functions
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DLLEXPORT int __stdcall FillWaveFormatEx(WAVEFORMATEX * pWaveFormatEx, int nSampleRate = 44100, int nBitsPerSample = 16, int nChannels = 2);
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DLLEXPORT int __stdcall FillWaveHeader(WAVE_HEADER * pWAVHeader, int nAudioBytes, WAVEFORMATEX * pWaveFormatEx, int nTerminatingBytes = 0);
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}
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#endif /* APE_MACLIB_H */
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