code:
Version 1.0.28 (2017-04-02)
  * Fix buffer overruns in FLAC and ID3 handling code.
  * Move to variable length header storage.
  * Fix detection of Large File Support for 32 bit systems.
  * Remove large stack allocations in ALAC handling code.
  * Remove all use of Variable Length Arrays.
  * Minor bug fixes and improvements.

Version 1.0.27 (2016-06-19)
  * Fix an SF_INFO seekable flag regression introduced in 1.0.26.
  * Fix potential infinite loops on malformed input files.
  * Add string metadata read/write for CAF and RF64.
  * Add handling of CUE chunks.
  * Fix endian-ness issues in PAF files.
  * Minor bug fixes and improvements.

Version 1.0.26 (2015-11-22)
  * Fix for CVE-2014-9496, SD2 buffer read overflow.
  * Fix for CVE-2014-9756, file_io.c divide by zero.
  * Fix for CVE-2015-7805, AIFF heap write overflow.
  * Add support for ALAC encoder in a CAF container.
  * Add support for Cart chunks in WAV files.
  * Minor bug fixes and improvements.

Version 1.0.25 (2011-07-13)
  * Fix for Secunia Advisory SA45125, heap overflow in PAF file handler.
  * Accept broken WAV files with blockalign == 0.
  * Minor bug fixes and improvements.

Version 1.0.24 (2011-03-23)
  * WAV files now have an 18 byte u-law and A-law fmt chunk.
  * Document virtual I/O functionality.
  * Two new methods rawHandle() and takeOwnership() in sndfile.hh.
  * AIFF fix for non-zero offset value in SSND chunk.
  * Minor bug fixes and improvements.

Version 1.0.23 (2010-10-10)
  * Add version metadata to Windows DLL.
  * Add a missing 'inline' to sndfile.hh.
  * Update docs.
  * Minor bug fixes and improvements.

Version 1.0.22 (2010-10-04)
  * Couple of fixes for SDS file writer.
  * Fixes arising from static analysis.
  * Handle FLAC files with ID3 meta data at start of file.
  * Handle FLAC files which report zero length.
  * Other minor bug fixes and improvements.

Version 1.0.21 (2009-12-13)
  * Add a couple of new binary programs to programs/ dir.
  * Remove sndfile-jackplay (now in sndfile-tools package).
  * Add windows only function sf_wchar_open().
  * Bunch of minor bug fixes.

Version 1.0.20 (2009-05-14)
  * Fix potential heap overflow in VOC file parser (Tobias Klein, http://www.trapkit.de/).

Version 1.0.19 (2009-03-02)
  * Fix for CVE-2009-0186 (Alin Rad Pop, Secunia Research).
  * Huge number of minor bug fixes as a result of static analysis.

Version 1.0.18 (2009-02-07)
  * Add Ogg/Vorbis support (thanks to John ffitch).
  * Remove captive FLAC library.
  * Many new features and bug fixes.
  * Generate Win32 and Win64 pre-compiled binaries.

Version 1.0.17 (2006-08-31)
  * Add sndfile.hh C++ wrapper.
  * Update Win32 MinGW build instructions.
  * Minor bug fixes and cleanups.

Version 1.0.16 (2006-04-30)
  * Add support for Broadcast (BEXT) chunks in WAV files.
  * Implement new commands SFC_GET_SIGNAL_MAX and SFC_GET_MAX_ALL_CHANNELS.
  * Add support for RIFX (big endian WAV variant).
  * Fix configure script bugs.
  * Fix bug in INST and MARK chunk writing for AIFF files.

Version 1.0.15 (2006-03-16)
  * Fix some ia64 issues.
  * Fix precompiled DLL.
  * Minor bug fixes.

Version 1.0.14 (2006-02-19)
  * Really fix MinGW compile problems.
  * Minor bug fixes.

Version 1.0.13 (2006-01-21)
  * Fix for MinGW compiler problems.
  * Allow readin/write of instrument chunks from WAV and AIFF files.
  * Compile problem fix for Solaris compiler.
  * Minor cleanups and bug fixes.

Version 1.0.12 (2005-09-30)
  * Add support for FLAC and Apple's Core Audio Format (CAF).
  * Add virtual I/O interface (still needs docs).
  * Cygwin and other Win32 fixes.
  * Minor bug fixes and cleanups.

Version 1.0.11 (2004-11-15)
  * Add support for SD2 files.
  * Add read support for loop info in WAV and AIFF files.
  * Add more tests.
  * Improve type safety.
  * Minor optimisations and bug fixes.

Version 1.0.10 (2004-06-15)
  * Fix AIFF read/write mode bugs.
  * Add support for compiling Win32 DLLS using MinGW.
  * Fix problems resulting in failed compiles with gcc-2.95.
  * Improve test suite.
  * Minor bug fixes.

Version 1.0.9 (2004-03-30)
  * Add handling of AVR (Audio Visual Research) files.
  * Improve handling of WAVEFORMATEXTENSIBLE WAV files.
  * Fix for using pipes on Win32.

Version 1.0.8 (2004-03-14)
  * Correct peak chunk handing for files with > 16 tracks.
  * Fix for WAV files with huge number of CUE chunks.

Version 1.0.7 (2004-02-25)
  * Fix clip mode detection on ia64, MIPS and other CPUs.
  * Fix two MacOSX build problems.

Version 1.0.6 (2004-02-08)
  * Added support for native Win32 file access API (Ross Bencina).
  * New mode to add clippling then a converting from float/double to integer
    would otherwise wrap around.
  * Fixed a bug in reading/writing files > 2Gig on Linux, Solaris and others.
  * Many minor bug fixes.
  * Other random fixes for Win32.

Version 1.0.5 (2003-05-03)
  * Added support for HTK files.
  * Added new function sf_open_fd() to allow for secure opening of temporary
    files as well as reading/writing sound files embedded within larger
    container files.
  * Added string support for AIFF files.
  * Minor bug fixes and code cleanups.

Version 1.0.4 (2003-02-02)
  * Added suport of PVF and XI files.
  * Added functionality for setting and retreiving strings from sound files.
  * Minor code cleanups and bug fixes.

Version 1.0.3 (2002-12-09)
  * Minor bug fixes.

Version 1.0.2 (2002-11-24)
  * Added support for VOX ADPCM.
  * Improved error reporting.
  * Added version scripting on Linux and Solaris.
  * Minor bug fixes.

Version 1.0.1 (2002-09-14)
  * Added MAT and MAT5 file formats.
  * Minor bug fixes.

Version 1.0.0 (2002-08-16)
  * Final release for 1.0.0.

Version 1.0.0rc6 (2002-08-14)
  * Release candidate 6 for the 1.0.0 series.
  * MacOS9 fixes.

Version 1.0.0rc5 (2002-08-10)
  * Release candidate 5 for the 1.0.0 series.
  * Changed the definition of sf_count_t which was causing problems when
    libsndfile was compiled with other libraries (ie WxWindows).
  * Minor bug fixes.
  * Documentation cleanup.

Version 1.0.0rc4 (2002-08-03)
  * Release candidate 4 for the 1.0.0 series.
  * Minor bug fixes.
  * Fix broken Win32 "make check".

Version 1.0.0rc3 (2002-08-02)
  * Release candidate 3 for the 1.0.0 series.
  * Fix bug where libsndfile was reading beyond the end of the data chunk.
  * Added on-the-fly header updates on write.
  * Fix a couple of documentation issues.

Version 1.0.0rc2 (2002-06-24)
  * Release candidate 2 for the 1.0.0 series.
  * Fix compile problem for Win32.

Version 1.0.0rc1 (2002-06-24)
  * Release candidate 1 for the 1.0.0 series.

Version 0.0.28 (2002-04-27)
  * Last offical release of 0.0.X series of the library.

Version 0.0.8 (1999-02-16)
  * First offical release.

path: vendor/libsndfile/NEWS


code:
/*
** Copyright (C) 1999-2016 Erik de Castro Lopo <erikd@mega-nerd.com>
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU Lesser General Public License as published by
** the Free Software Foundation; either version 2.1 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
** GNU Lesser General Public License for more details.
**
** You should have received a copy of the GNU Lesser General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/

/*
** sndfile.h -- system-wide definitions
**
** API documentation is in the doc/ directory of the source code tarball
** and at http://www.mega-nerd.com/libsndfile/api.html.
*/

#ifndef SNDFILE_H
#define SNDFILE_H

/* This is the version 1.0.X header file. */
#define	SNDFILE_1

#include <stdio.h>
#include <stdint.h>
#include <sys/types.h>

#ifdef __cplusplus
extern "C" {
#endif	/* __cplusplus */

/* The following file types can be read and written.
** A file type would consist of a major type (ie SF_FORMAT_WAV) bitwise
** ORed with a minor type (ie SF_FORMAT_PCM). SF_FORMAT_TYPEMASK and
** SF_FORMAT_SUBMASK can be used to separate the major and minor file
** types.
*/

enum
{	/* Major formats. */
	SF_FORMAT_WAV			= 0x010000,		/* Microsoft WAV format (little endian default). */
	SF_FORMAT_AIFF			= 0x020000,		/* Apple/SGI AIFF format (big endian). */
	SF_FORMAT_AU			= 0x030000,		/* Sun/NeXT AU format (big endian). */
	SF_FORMAT_RAW			= 0x040000,		/* RAW PCM data. */
	SF_FORMAT_PAF			= 0x050000,		/* Ensoniq PARIS file format. */
	SF_FORMAT_SVX			= 0x060000,		/* Amiga IFF / SVX8 / SV16 format. */
	SF_FORMAT_NIST			= 0x070000,		/* Sphere NIST format. */
	SF_FORMAT_VOC			= 0x080000,		/* VOC files. */
	SF_FORMAT_IRCAM			= 0x0A0000,		/* Berkeley/IRCAM/CARL */
	SF_FORMAT_W64			= 0x0B0000,		/* Sonic Foundry's 64 bit RIFF/WAV */
	SF_FORMAT_MAT4			= 0x0C0000,		/* Matlab (tm) V4.2 / GNU Octave 2.0 */
	SF_FORMAT_MAT5			= 0x0D0000,		/* Matlab (tm) V5.0 / GNU Octave 2.1 */
	SF_FORMAT_PVF			= 0x0E0000,		/* Portable Voice Format */
	SF_FORMAT_XI			= 0x0F0000,		/* Fasttracker 2 Extended Instrument */
	SF_FORMAT_HTK			= 0x100000,		/* HMM Tool Kit format */
	SF_FORMAT_SDS			= 0x110000,		/* Midi Sample Dump Standard */
	SF_FORMAT_AVR			= 0x120000,		/* Audio Visual Research */
	SF_FORMAT_WAVEX			= 0x130000,		/* MS WAVE with WAVEFORMATEX */
	SF_FORMAT_SD2			= 0x160000,		/* Sound Designer 2 */
	SF_FORMAT_FLAC			= 0x170000,		/* FLAC lossless file format */
	SF_FORMAT_CAF			= 0x180000,		/* Core Audio File format */
	SF_FORMAT_WVE			= 0x190000,		/* Psion WVE format */
	SF_FORMAT_OGG			= 0x200000,		/* Xiph OGG container */
	SF_FORMAT_MPC2K			= 0x210000,		/* Akai MPC 2000 sampler */
	SF_FORMAT_RF64			= 0x220000,		/* RF64 WAV file */

	/* Subtypes from here on. */

	SF_FORMAT_PCM_S8		= 0x0001,		/* Signed 8 bit data */
	SF_FORMAT_PCM_16		= 0x0002,		/* Signed 16 bit data */
	SF_FORMAT_PCM_24		= 0x0003,		/* Signed 24 bit data */
	SF_FORMAT_PCM_32		= 0x0004,		/* Signed 32 bit data */

	SF_FORMAT_PCM_U8		= 0x0005,		/* Unsigned 8 bit data (WAV and RAW only) */

	SF_FORMAT_FLOAT			= 0x0006,		/* 32 bit float data */
	SF_FORMAT_DOUBLE		= 0x0007,		/* 64 bit float data */

	SF_FORMAT_ULAW			= 0x0010,		/* U-Law encoded. */
	SF_FORMAT_ALAW			= 0x0011,		/* A-Law encoded. */
	SF_FORMAT_IMA_ADPCM		= 0x0012,		/* IMA ADPCM. */
	SF_FORMAT_MS_ADPCM		= 0x0013,		/* Microsoft ADPCM. */

	SF_FORMAT_GSM610		= 0x0020,		/* GSM 6.10 encoding. */
	SF_FORMAT_VOX_ADPCM		= 0x0021,		/* OKI / Dialogix ADPCM */

	SF_FORMAT_G721_32		= 0x0030,		/* 32kbs G721 ADPCM encoding. */
	SF_FORMAT_G723_24		= 0x0031,		/* 24kbs G723 ADPCM encoding. */
	SF_FORMAT_G723_40		= 0x0032,		/* 40kbs G723 ADPCM encoding. */

	SF_FORMAT_DWVW_12		= 0x0040, 		/* 12 bit Delta Width Variable Word encoding. */
	SF_FORMAT_DWVW_16		= 0x0041, 		/* 16 bit Delta Width Variable Word encoding. */
	SF_FORMAT_DWVW_24		= 0x0042, 		/* 24 bit Delta Width Variable Word encoding. */
	SF_FORMAT_DWVW_N		= 0x0043, 		/* N bit Delta Width Variable Word encoding. */

	SF_FORMAT_DPCM_8		= 0x0050,		/* 8 bit differential PCM (XI only) */
	SF_FORMAT_DPCM_16		= 0x0051,		/* 16 bit differential PCM (XI only) */

	SF_FORMAT_VORBIS		= 0x0060,		/* Xiph Vorbis encoding. */

	SF_FORMAT_ALAC_16		= 0x0070,		/* Apple Lossless Audio Codec (16 bit). */
	SF_FORMAT_ALAC_20		= 0x0071,		/* Apple Lossless Audio Codec (20 bit). */
	SF_FORMAT_ALAC_24		= 0x0072,		/* Apple Lossless Audio Codec (24 bit). */
	SF_FORMAT_ALAC_32		= 0x0073,		/* Apple Lossless Audio Codec (32 bit). */

	/* Endian-ness options. */

	SF_ENDIAN_FILE			= 0x00000000,	/* Default file endian-ness. */
	SF_ENDIAN_LITTLE		= 0x10000000,	/* Force little endian-ness. */
	SF_ENDIAN_BIG			= 0x20000000,	/* Force big endian-ness. */
	SF_ENDIAN_CPU			= 0x30000000,	/* Force CPU endian-ness. */

	SF_FORMAT_SUBMASK		= 0x0000FFFF,
	SF_FORMAT_TYPEMASK		= 0x0FFF0000,
	SF_FORMAT_ENDMASK		= 0x30000000
} ;

/*
** The following are the valid command numbers for the sf_command()
** interface.  The use of these commands is documented in the file
** command.html in the doc directory of the source code distribution.
*/

enum
{	SFC_GET_LIB_VERSION				= 0x1000,
	SFC_GET_LOG_INFO				= 0x1001,
	SFC_GET_CURRENT_SF_INFO			= 0x1002,

	SFC_GET_NORM_DOUBLE				= 0x1010,
	SFC_GET_NORM_FLOAT				= 0x1011,
	SFC_SET_NORM_DOUBLE				= 0x1012,
	SFC_SET_NORM_FLOAT				= 0x1013,
	SFC_SET_SCALE_FLOAT_INT_READ	= 0x1014,
	SFC_SET_SCALE_INT_FLOAT_WRITE	= 0x1015,

	SFC_GET_SIMPLE_FORMAT_COUNT		= 0x1020,
	SFC_GET_SIMPLE_FORMAT			= 0x1021,

	SFC_GET_FORMAT_INFO				= 0x1028,

	SFC_GET_FORMAT_MAJOR_COUNT		= 0x1030,
	SFC_GET_FORMAT_MAJOR			= 0x1031,
	SFC_GET_FORMAT_SUBTYPE_COUNT	= 0x1032,
	SFC_GET_FORMAT_SUBTYPE			= 0x1033,

	SFC_CALC_SIGNAL_MAX				= 0x1040,
	SFC_CALC_NORM_SIGNAL_MAX		= 0x1041,
	SFC_CALC_MAX_ALL_CHANNELS		= 0x1042,
	SFC_CALC_NORM_MAX_ALL_CHANNELS	= 0x1043,
	SFC_GET_SIGNAL_MAX				= 0x1044,
	SFC_GET_MAX_ALL_CHANNELS		= 0x1045,

	SFC_SET_ADD_PEAK_CHUNK			= 0x1050,
	SFC_SET_ADD_HEADER_PAD_CHUNK	= 0x1051,

	SFC_UPDATE_HEADER_NOW			= 0x1060,
	SFC_SET_UPDATE_HEADER_AUTO		= 0x1061,

	SFC_FILE_TRUNCATE				= 0x1080,

	SFC_SET_RAW_START_OFFSET		= 0x1090,

	SFC_SET_DITHER_ON_WRITE			= 0x10A0,
	SFC_SET_DITHER_ON_READ			= 0x10A1,

	SFC_GET_DITHER_INFO_COUNT		= 0x10A2,
	SFC_GET_DITHER_INFO				= 0x10A3,

	SFC_GET_EMBED_FILE_INFO			= 0x10B0,

	SFC_SET_CLIPPING				= 0x10C0,
	SFC_GET_CLIPPING				= 0x10C1,

	SFC_GET_CUE_COUNT				= 0x10CD,
	SFC_GET_CUE						= 0x10CE,
	SFC_SET_CUE						= 0x10CF,

	SFC_GET_INSTRUMENT				= 0x10D0,
	SFC_SET_INSTRUMENT				= 0x10D1,

	SFC_GET_LOOP_INFO				= 0x10E0,

	SFC_GET_BROADCAST_INFO			= 0x10F0,
	SFC_SET_BROADCAST_INFO			= 0x10F1,

	SFC_GET_CHANNEL_MAP_INFO		= 0x1100,
	SFC_SET_CHANNEL_MAP_INFO		= 0x1101,

	SFC_RAW_DATA_NEEDS_ENDSWAP		= 0x1110,

	/* Support for Wavex Ambisonics Format */
	SFC_WAVEX_SET_AMBISONIC			= 0x1200,
	SFC_WAVEX_GET_AMBISONIC			= 0x1201,

	/*
	** RF64 files can be set so that on-close, writable files that have less
	** than 4GB of data in them are converted to RIFF/WAV, as per EBU
	** recommendations.
	*/
	SFC_RF64_AUTO_DOWNGRADE			= 0x1210,

	SFC_SET_VBR_ENCODING_QUALITY	= 0x1300,
	SFC_SET_COMPRESSION_LEVEL		= 0x1301,

	/* Cart Chunk support */
	SFC_SET_CART_INFO				= 0x1400,
	SFC_GET_CART_INFO				= 0x1401,

	/* Following commands for testing only. */
	SFC_TEST_IEEE_FLOAT_REPLACE		= 0x6001,

	/*
	** SFC_SET_ADD_* values are deprecated and will disappear at some
	** time in the future. They are guaranteed to be here up to and
	** including version 1.0.8 to avoid breakage of existing software.
	** They currently do nothing and will continue to do nothing.
	*/
	SFC_SET_ADD_DITHER_ON_WRITE		= 0x1070,
	SFC_SET_ADD_DITHER_ON_READ		= 0x1071
} ;

/*
** String types that can be set and read from files. Not all file types
** support this and even the file types which support one, may not support
** all string types.
*/

enum
{	SF_STR_TITLE					= 0x01,
	SF_STR_COPYRIGHT				= 0x02,
	SF_STR_SOFTWARE					= 0x03,
	SF_STR_ARTIST					= 0x04,
	SF_STR_COMMENT					= 0x05,
	SF_STR_DATE						= 0x06,
	SF_STR_ALBUM					= 0x07,
	SF_STR_LICENSE					= 0x08,
	SF_STR_TRACKNUMBER				= 0x09,
	SF_STR_GENRE					= 0x10
} ;

/*
** Use the following as the start and end index when doing metadata
** transcoding.
*/

#define	SF_STR_FIRST	SF_STR_TITLE
#define	SF_STR_LAST		SF_STR_GENRE

enum
{	/* True and false */
	SF_FALSE	= 0,
	SF_TRUE		= 1,

	/* Modes for opening files. */
	SFM_READ	= 0x10,
	SFM_WRITE	= 0x20,
	SFM_RDWR	= 0x30,

	SF_AMBISONIC_NONE		= 0x40,
	SF_AMBISONIC_B_FORMAT	= 0x41
} ;

/* Public error values. These are guaranteed to remain unchanged for the duration
** of the library major version number.
** There are also a large number of private error numbers which are internal to
** the library which can change at any time.
*/

enum
{	SF_ERR_NO_ERROR				= 0,
	SF_ERR_UNRECOGNISED_FORMAT	= 1,
	SF_ERR_SYSTEM				= 2,
	SF_ERR_MALFORMED_FILE		= 3,
	SF_ERR_UNSUPPORTED_ENCODING	= 4
} ;

/* Channel map values (used with SFC_SET/GET_CHANNEL_MAP).
*/

enum
{	SF_CHANNEL_MAP_INVALID = 0,
	SF_CHANNEL_MAP_MONO = 1,
	SF_CHANNEL_MAP_LEFT,					/* Apple calls this 'Left' */
	SF_CHANNEL_MAP_RIGHT,					/* Apple calls this 'Right' */
	SF_CHANNEL_MAP_CENTER,					/* Apple calls this 'Center' */
	SF_CHANNEL_MAP_FRONT_LEFT,
	SF_CHANNEL_MAP_FRONT_RIGHT,
	SF_CHANNEL_MAP_FRONT_CENTER,
	SF_CHANNEL_MAP_REAR_CENTER,				/* Apple calls this 'Center Surround', Msft calls this 'Back Center' */
	SF_CHANNEL_MAP_REAR_LEFT,				/* Apple calls this 'Left Surround', Msft calls this 'Back Left' */
	SF_CHANNEL_MAP_REAR_RIGHT,				/* Apple calls this 'Right Surround', Msft calls this 'Back Right' */
	SF_CHANNEL_MAP_LFE,						/* Apple calls this 'LFEScreen', Msft calls this 'Low Frequency'  */
	SF_CHANNEL_MAP_FRONT_LEFT_OF_CENTER,	/* Apple calls this 'Left Center' */
	SF_CHANNEL_MAP_FRONT_RIGHT_OF_CENTER,	/* Apple calls this 'Right Center */
	SF_CHANNEL_MAP_SIDE_LEFT,				/* Apple calls this 'Left Surround Direct' */
	SF_CHANNEL_MAP_SIDE_RIGHT,				/* Apple calls this 'Right Surround Direct' */
	SF_CHANNEL_MAP_TOP_CENTER,				/* Apple calls this 'Top Center Surround' */
	SF_CHANNEL_MAP_TOP_FRONT_LEFT,			/* Apple calls this 'Vertical Height Left' */
	SF_CHANNEL_MAP_TOP_FRONT_RIGHT,			/* Apple calls this 'Vertical Height Right' */
	SF_CHANNEL_MAP_TOP_FRONT_CENTER,		/* Apple calls this 'Vertical Height Center' */
	SF_CHANNEL_MAP_TOP_REAR_LEFT,			/* Apple and MS call this 'Top Back Left' */
	SF_CHANNEL_MAP_TOP_REAR_RIGHT,			/* Apple and MS call this 'Top Back Right' */
	SF_CHANNEL_MAP_TOP_REAR_CENTER,			/* Apple and MS call this 'Top Back Center' */

	SF_CHANNEL_MAP_AMBISONIC_B_W,
	SF_CHANNEL_MAP_AMBISONIC_B_X,
	SF_CHANNEL_MAP_AMBISONIC_B_Y,
	SF_CHANNEL_MAP_AMBISONIC_B_Z,

	SF_CHANNEL_MAP_MAX
} ;

/* A SNDFILE* pointer can be passed around much like stdio.h's FILE* pointer. */

typedef	struct SNDFILE_tag	SNDFILE ;

/* The following typedef is system specific and is defined when libsndfile is
** compiled. sf_count_t will be a 64 bit value when the underlying OS allows
** 64 bit file offsets.
** On windows, we need to allow the same header file to be compiler by both GCC
** and the Microsoft compiler.
*/

#if (defined (_MSCVER) || defined (_MSC_VER) && (_MSC_VER < 1310))
typedef __int64		sf_count_t ;
#define SF_COUNT_MAX		0x7fffffffffffffffi64
#else
typedef __int64	sf_count_t ;
#define SF_COUNT_MAX		0x7FFFFFFFFFFFFFFFLL
#endif

/* A pointer to a SF_INFO structure is passed to sf_open () and filled in.
** On write, the SF_INFO structure is filled in by the user and passed into
** sf_open ().
*/

struct SF_INFO
{	sf_count_t	frames ;		/* Used to be called samples.  Changed to avoid confusion. */
	int			samplerate ;
	int			channels ;
	int			format ;
	int			sections ;
	int			seekable ;
} ;

typedef	struct SF_INFO SF_INFO ;

/* The SF_FORMAT_INFO struct is used to retrieve information about the sound
** file formats libsndfile supports using the sf_command () interface.
**
** Using this interface will allow applications to support new file formats
** and encoding types when libsndfile is upgraded, without requiring
** re-compilation of the application.
**
** Please consult the libsndfile documentation (particularly the information
** on the sf_command () interface) for examples of its use.
*/

typedef struct
{	int			format ;
	const char	*name ;
	const char	*extension ;
} SF_FORMAT_INFO ;

/*
** Enums and typedefs for adding dither on read and write.
** See the html documentation for sf_command(), SFC_SET_DITHER_ON_WRITE
** and SFC_SET_DITHER_ON_READ.
*/

enum
{	SFD_DEFAULT_LEVEL	= 0,
	SFD_CUSTOM_LEVEL	= 0x40000000,

	SFD_NO_DITHER		= 500,
	SFD_WHITE			= 501,
	SFD_TRIANGULAR_PDF	= 502
} ;

typedef struct
{	int			type ;
	double		level ;
	const char	*name ;
} SF_DITHER_INFO ;

/* Struct used to retrieve information about a file embedded within a
** larger file. See SFC_GET_EMBED_FILE_INFO.
*/

typedef struct
{	sf_count_t	offset ;
	sf_count_t	length ;
} SF_EMBED_FILE_INFO ;

/*
**	Struct used to retrieve cue marker information from a file
*/

typedef struct
{	int32_t 	indx ;
	uint32_t 	position ;
	int32_t 	fcc_chunk ;
	int32_t 	chunk_start ;
	int32_t		block_start ;
	uint32_t 	sample_offset ;
	char name [256] ;
} SF_CUE_POINT ;

#define	SF_CUES_VAR(count) \
	struct \
	{	uint32_t cue_count ; \
		SF_CUE_POINT cue_points [count] ; \
	}

typedef SF_CUES_VAR (100) SF_CUES ;

/*
**	Structs used to retrieve music sample information from a file.
*/

enum
{	/*
	**	The loop mode field in SF_INSTRUMENT will be one of the following.
	*/
	SF_LOOP_NONE = 800,
	SF_LOOP_FORWARD,
	SF_LOOP_BACKWARD,
	SF_LOOP_ALTERNATING
} ;

typedef struct
{	int gain ;
	char basenote, detune ;
	char velocity_lo, velocity_hi ;
	char key_lo, key_hi ;
	int loop_count ;

	struct
	{	int mode ;
		uint32_t start ;
		uint32_t end ;
		uint32_t count ;
	} loops [16] ; /* make variable in a sensible way */
} SF_INSTRUMENT ;

/* Struct used to retrieve loop information from a file.*/
typedef struct
{
	short	time_sig_num ;	/* any positive integer    > 0  */
	short	time_sig_den ;	/* any positive power of 2 > 0  */
	int		loop_mode ;		/* see SF_LOOP enum             */

	int		num_beats ;		/* this is NOT the amount of quarter notes !!!*/
							/* a full bar of 4/4 is 4 beats */
							/* a full bar of 7/8 is 7 beats */

	float	bpm ;			/* suggestion, as it can be calculated using other fields:*/
							/* file's length, file's sampleRate and our time_sig_den*/
							/* -> bpms are always the amount of _quarter notes_ per minute */

	int	root_key ;			/* MIDI note, or -1 for None */
	int future [6] ;
} SF_LOOP_INFO ;

/*	Struct used to retrieve broadcast (EBU) information from a file.
**	Strongly (!) based on EBU "bext" chunk format used in Broadcast WAVE.
*/
#define	SF_BROADCAST_INFO_VAR(coding_hist_size) \
			struct \
			{	char		description [256] ; \
				char		originator [32] ; \
				char		originator_reference [32] ; \
				char		origination_date [10] ; \
				char		origination_time [8] ; \
				uint32_t	time_reference_low ; \
				uint32_t	time_reference_high ; \
				short		version ; \
				char		umid [64] ; \
				char		reserved [190] ; \
				uint32_t	coding_history_size ; \
				char		coding_history [coding_hist_size] ; \
			}

/* SF_BROADCAST_INFO is the above struct with coding_history field of 256 bytes. */
typedef SF_BROADCAST_INFO_VAR (256) SF_BROADCAST_INFO ;

struct SF_CART_TIMER
{	char	usage [4] ;
	int32_t	value ;
} ;

typedef struct SF_CART_TIMER SF_CART_TIMER ;

#define	SF_CART_INFO_VAR(p_tag_text_size) \
			struct \
			{	char		version [4] ; \
				char		title [64] ; \
				char		artist [64] ; \
				char		cut_id [64] ; \
				char		client_id [64] ; \
				char		category [64] ; \
				char		classification [64] ; \
				char		out_cue [64] ; \
				char		start_date [10] ; \
				char		start_time [8] ; \
				char		end_date [10] ; \
				char		end_time [8] ; \
				char		producer_app_id [64] ; \
				char		producer_app_version [64] ; \
				char		user_def [64] ; \
				int32_t		level_reference ; \
				SF_CART_TIMER	post_timers [8] ; \
				char		reserved [276] ; \
				char		url [1024] ; \
				uint32_t	tag_text_size ; \
				char		tag_text [p_tag_text_size] ; \
			}

typedef SF_CART_INFO_VAR (256) SF_CART_INFO ;

/*	Virtual I/O functionality. */

typedef sf_count_t		(*sf_vio_get_filelen)	(void *user_data) ;
typedef sf_count_t		(*sf_vio_seek)		(sf_count_t offset, int whence, void *user_data) ;
typedef sf_count_t		(*sf_vio_read)		(void *ptr, sf_count_t count, void *user_data) ;
typedef sf_count_t		(*sf_vio_write)		(const void *ptr, sf_count_t count, void *user_data) ;
typedef sf_count_t		(*sf_vio_tell)		(void *user_data) ;

struct SF_VIRTUAL_IO
{	sf_vio_get_filelen	get_filelen ;
	sf_vio_seek			seek ;
	sf_vio_read			read ;
	sf_vio_write		write ;
	sf_vio_tell			tell ;
} ;

typedef	struct SF_VIRTUAL_IO SF_VIRTUAL_IO ;

/* Open the specified file for read, write or both. On error, this will
** return a NULL pointer. To find the error number, pass a NULL SNDFILE
** to sf_strerror ().
** All calls to sf_open() should be matched with a call to sf_close().
*/

SNDFILE* 	sf_open		(const char *path, int mode, SF_INFO *sfinfo) ;

/* Use the existing file descriptor to create a SNDFILE object. If close_desc
** is TRUE, the file descriptor will be closed when sf_close() is called. If
** it is FALSE, the descriptor will not be closed.
** When passed a descriptor like this, the library will assume that the start
** of file header is at the current file offset. This allows sound files within
** larger container files to be read and/or written.
** On error, this will return a NULL pointer. To find the error number, pass a
** NULL SNDFILE to sf_strerror ().
** All calls to sf_open_fd() should be matched with a call to sf_close().

*/

SNDFILE* 	sf_open_fd	(int fd, int mode, SF_INFO *sfinfo, int close_desc) ;

SNDFILE* 	sf_open_virtual	(SF_VIRTUAL_IO *sfvirtual, int mode, SF_INFO *sfinfo, void *user_data) ;

/* sf_error () returns a error number which can be translated to a text
** string using sf_error_number().
*/

int		sf_error		(SNDFILE *sndfile) ;

/* sf_strerror () returns to the caller a pointer to the current error message for
** the given SNDFILE.
*/

const char* sf_strerror (SNDFILE *sndfile) ;

/* sf_error_number () allows the retrieval of the error string for each internal
** error number.
**
*/

const char*	sf_error_number	(int errnum) ;

/* The following two error functions are deprecated but they will remain in the
** library for the foreseeable future. The function sf_strerror() should be used
** in their place.
*/

int		sf_perror		(SNDFILE *sndfile) ;
int		sf_error_str	(SNDFILE *sndfile, char* str, size_t len) ;

/* Return TRUE if fields of the SF_INFO struct are a valid combination of values. */

int		sf_command	(SNDFILE *sndfile, int command, void *data, int datasize) ;

/* Return TRUE if fields of the SF_INFO struct are a valid combination of values. */

int		sf_format_check	(const SF_INFO *info) ;

/* Seek within the waveform data chunk of the SNDFILE. sf_seek () uses
** the same values for whence (SEEK_SET, SEEK_CUR and SEEK_END) as
** stdio.h function fseek ().
** An offset of zero with whence set to SEEK_SET will position the
** read / write pointer to the first data sample.
** On success sf_seek returns the current position in (multi-channel)
** samples from the start of the file.
** Please see the libsndfile documentation for moving the read pointer
** separately from the write pointer on files open in mode SFM_RDWR.
** On error all of these functions return -1.
*/

enum
{	SF_SEEK_SET = SEEK_SET,
	SF_SEEK_CUR = SEEK_CUR,
	SF_SEEK_END = SEEK_END
} ;

sf_count_t	sf_seek 		(SNDFILE *sndfile, sf_count_t frames, int whence) ;

/* Functions for retrieving and setting string data within sound files.
** Not all file types support this features; AIFF and WAV do. For both
** functions, the str_type parameter must be one of the SF_STR_* values
** defined above.
** On error, sf_set_string() returns non-zero while sf_get_string()
** returns NULL.
*/

int sf_set_string (SNDFILE *sndfile, int str_type, const char* str) ;

const char* sf_get_string (SNDFILE *sndfile, int str_type) ;

/* Return the library version string. */

const char * sf_version_string (void) ;

/* Return the current byterate at this point in the file. The byte rate in this
** case is the number of bytes per second of audio data. For instance, for a
** stereo, 18 bit PCM encoded file with an 16kHz sample rate, the byte rate
** would be 2 (stereo) * 2 (two bytes per sample) * 16000 => 64000 bytes/sec.
** For some file formats the returned value will be accurate and exact, for some
** it will be a close approximation, for some it will be the average bitrate for
** the whole file and for some it will be a time varying value that was accurate
** when the file was most recently read or written.
** To get the bitrate, multiple this value by 8.
** Returns -1 for unknown.
*/
int sf_current_byterate (SNDFILE *sndfile) ;

/* Functions for reading/writing the waveform data of a sound file.
*/

sf_count_t	sf_read_raw		(SNDFILE *sndfile, void *ptr, sf_count_t bytes) ;
sf_count_t	sf_write_raw 	(SNDFILE *sndfile, const void *ptr, sf_count_t bytes) ;

/* Functions for reading and writing the data chunk in terms of frames.
** The number of items actually read/written = frames * number of channels.
**     sf_xxxx_raw		read/writes the raw data bytes from/to the file
**     sf_xxxx_short	passes data in the native short format
**     sf_xxxx_int		passes data in the native int format
**     sf_xxxx_float	passes data in the native float format
**     sf_xxxx_double	passes data in the native double format
** All of these read/write function return number of frames read/written.
*/

sf_count_t	sf_readf_short	(SNDFILE *sndfile, short *ptr, sf_count_t frames) ;
sf_count_t	sf_writef_short	(SNDFILE *sndfile, const short *ptr, sf_count_t frames) ;

sf_count_t	sf_readf_int	(SNDFILE *sndfile, int *ptr, sf_count_t frames) ;
sf_count_t	sf_writef_int 	(SNDFILE *sndfile, const int *ptr, sf_count_t frames) ;

sf_count_t	sf_readf_float	(SNDFILE *sndfile, float *ptr, sf_count_t frames) ;
sf_count_t	sf_writef_float	(SNDFILE *sndfile, const float *ptr, sf_count_t frames) ;

sf_count_t	sf_readf_double		(SNDFILE *sndfile, double *ptr, sf_count_t frames) ;
sf_count_t	sf_writef_double	(SNDFILE *sndfile, const double *ptr, sf_count_t frames) ;

/* Functions for reading and writing the data chunk in terms of items.
** Otherwise similar to above.
** All of these read/write function return number of items read/written.
*/

sf_count_t	sf_read_short	(SNDFILE *sndfile, short *ptr, sf_count_t items) ;
sf_count_t	sf_write_short	(SNDFILE *sndfile, const short *ptr, sf_count_t items) ;

sf_count_t	sf_read_int		(SNDFILE *sndfile, int *ptr, sf_count_t items) ;
sf_count_t	sf_write_int 	(SNDFILE *sndfile, const int *ptr, sf_count_t items) ;

sf_count_t	sf_read_float	(SNDFILE *sndfile, float *ptr, sf_count_t items) ;
sf_count_t	sf_write_float	(SNDFILE *sndfile, const float *ptr, sf_count_t items) ;

sf_count_t	sf_read_double	(SNDFILE *sndfile, double *ptr, sf_count_t items) ;
sf_count_t	sf_write_double	(SNDFILE *sndfile, const double *ptr, sf_count_t items) ;

/* Close the SNDFILE and clean up all memory allocations associated with this
** file.
** Returns 0 on success, or an error number.
*/

int		sf_close		(SNDFILE *sndfile) ;

/* If the file is opened SFM_WRITE or SFM_RDWR, call fsync() on the file
** to force the writing of data to disk. If the file is opened SFM_READ
** no action is taken.
*/

void	sf_write_sync	(SNDFILE *sndfile) ;

/* The function sf_wchar_open() is Windows Only!
** Open a file passing in a Windows Unicode filename. Otherwise, this is
** the same as sf_open().
**
** In order for this to work, you need to do the following:
**
**		#include <windows.h>
**		#define ENABLE_SNDFILE_WINDOWS_PROTOTYPES 1
**		#including <sndfile.h>
*/

#if (defined (ENABLE_SNDFILE_WINDOWS_PROTOTYPES) && ENABLE_SNDFILE_WINDOWS_PROTOTYPES)
SNDFILE* sf_wchar_open (LPCWSTR wpath, int mode, SF_INFO *sfinfo) ;
#endif

/* Getting and setting of chunks from within a sound file.
**
** These functions allow the getting and setting of chunks within a sound file
** (for those formats which allow it).
**
** These functions fail safely. Specifically, they will not allow you to overwrite
** existing chunks or add extra versions of format specific reserved chunks but
** should allow you to retrieve any and all chunks (may not be implemented for
** all chunks or all file formats).
*/

struct SF_CHUNK_INFO
{	char		id [64] ;	/* The chunk identifier. */
	unsigned	id_size ;	/* The size of the chunk identifier. */
	unsigned	datalen ;	/* The size of that data. */
	void		*data ;		/* Pointer to the data. */
} ;

typedef struct SF_CHUNK_INFO SF_CHUNK_INFO ;

/* Set the specified chunk info (must be done before any audio data is written
** to the file). This will fail for format specific reserved chunks.
** The chunk_info->data pointer must be valid until the file is closed.
** Returns SF_ERR_NO_ERROR on success or non-zero on failure.
*/
int sf_set_chunk (SNDFILE * sndfile, const SF_CHUNK_INFO * chunk_info) ;

/*
** An opaque structure to an iterator over the all chunks of a given id
*/
typedef	struct SF_CHUNK_ITERATOR SF_CHUNK_ITERATOR ;

/* Get an iterator for all chunks matching chunk_info.
** The iterator will point to the first chunk matching chunk_info.
** Chunks are matching, if (chunk_info->id) matches the first
**     (chunk_info->id_size) bytes of a chunk found in the SNDFILE* handle.
** If chunk_info is NULL, an iterator to all chunks in the SNDFILE* handle
**     is returned.
** The values of chunk_info->datalen and chunk_info->data are ignored.
** If no matching chunks are found in the sndfile, NULL is returned.
** The returned iterator will stay valid until one of the following occurs:
**     a) The sndfile is closed.
**     b) A new chunk is added using sf_set_chunk().
**     c) Another chunk iterator function is called on the same SNDFILE* handle
**        that causes the iterator to be modified.
** The memory for the iterator belongs to the SNDFILE* handle and is freed when
** sf_close() is called.
*/
SF_CHUNK_ITERATOR *
sf_get_chunk_iterator (SNDFILE * sndfile, const SF_CHUNK_INFO * chunk_info) ;

/* Iterate through chunks by incrementing the iterator.
** Increments the iterator and returns a handle to the new one.
** After this call, iterator will no longer be valid, and you must use the
**      newly returned handle from now on.
** The returned handle can be used to access the next chunk matching
**      the criteria as defined in sf_get_chunk_iterator().
** If iterator points to the last chunk, this will free all resources
**      associated with iterator and return NULL.
** The returned iterator will stay valid until sf_get_chunk_iterator_next
**      is called again, the sndfile is closed or a new chunk us added.
*/
SF_CHUNK_ITERATOR *
sf_next_chunk_iterator (SF_CHUNK_ITERATOR * iterator) ;

/* Get the size of the specified chunk.
** If the specified chunk exists, the size will be returned in the
**      datalen field of the SF_CHUNK_INFO struct.
**      Additionally, the id of the chunk will be copied to the id
**      field of the SF_CHUNK_INFO struct and it's id_size field will
**      be updated accordingly.
** If the chunk doesn't exist chunk_info->datalen will be zero, and the
**      id and id_size fields will be undefined.
** The function will return SF_ERR_NO_ERROR on success or non-zero on
** failure.
*/
int
sf_get_chunk_size (const SF_CHUNK_ITERATOR * it, SF_CHUNK_INFO * chunk_info) ;

/* Get the specified chunk data.
** If the specified chunk exists, up to chunk_info->datalen bytes of
**      the chunk data will be copied into the chunk_info->data buffer
**      (allocated by the caller) and the chunk_info->datalen field
**      updated to reflect the size of the data. The id and id_size
**      field will be updated according to the retrieved chunk
** If the chunk doesn't exist chunk_info->datalen will be zero, and the
**      id and id_size fields will be undefined.
** The function will return SF_ERR_NO_ERROR on success or non-zero on
** failure.
*/
int
sf_get_chunk_data (const SF_CHUNK_ITERATOR * it, SF_CHUNK_INFO * chunk_info) ;

#ifdef __cplusplus
}		/* extern "C" */
#endif	/* __cplusplus */

#endif	/* SNDFILE_H */

license: mit


code:
/*
** Copyright (C) 2005-2012 Erik de Castro Lopo <erikd@mega-nerd.com>
**
** All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
**
**     * Redistributions of source code must retain the above copyright
**       notice, this list of conditions and the following disclaimer.
**     * Redistributions in binary form must reproduce the above copyright
**       notice, this list of conditions and the following disclaimer in
**       the documentation and/or other materials provided with the
**       distribution.
**     * Neither the author nor the names of any contributors may be used
**       to endorse or promote products derived from this software without
**       specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
** TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
** PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
** CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
** EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
** PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
** OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
** WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
** OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
** ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

/*
** The above modified BSD style license (GPL and LGPL compatible) applies to
** this file. It does not apply to libsndfile itself which is released under
** the GNU LGPL or the libsndfile test suite which is released under the GNU
** GPL.
** This means that this header file can be used under this modified BSD style
** license, but the LGPL still holds for the libsndfile library itself.
*/

/*
** sndfile.hh -- A lightweight C++ wrapper for the libsndfile API.
**
** All the methods are inlines and all functionality is contained in this
** file. There is no separate implementation file.
**
** API documentation is in the doc/ directory of the source code tarball
** and at http://www.mega-nerd.com/libsndfile/api.html.
*/

#ifndef SNDFILE_HH
#define SNDFILE_HH

#include <sndfile.h>

#include <string>
#include <new> // for std::nothrow

class SndfileHandle
{	private :
		struct SNDFILE_ref
		{	SNDFILE_ref (void) ;
			~SNDFILE_ref (void) ;

			SNDFILE *sf ;
			SF_INFO sfinfo ;
			int ref ;
			} ;

		SNDFILE_ref *p ;

	public :
			/* Default constructor */
			SndfileHandle (void) : p (NULL) {} ;
			SndfileHandle (const char *path, int mode = SFM_READ,
							int format = 0, int channels = 0, int samplerate = 0) ;
			SndfileHandle (std::string const & path, int mode = SFM_READ,
							int format = 0, int channels = 0, int samplerate = 0) ;
			SndfileHandle (int fd, bool close_desc, int mode = SFM_READ,
							int format = 0, int channels = 0, int samplerate = 0) ;
			SndfileHandle (SF_VIRTUAL_IO &sfvirtual, void *user_data, int mode = SFM_READ,
							int format = 0, int channels = 0, int samplerate = 0) ;

#ifdef ENABLE_SNDFILE_WINDOWS_PROTOTYPES
			SndfileHandle (LPCWSTR wpath, int mode = SFM_READ,
							int format = 0, int channels = 0, int samplerate = 0) ;
#endif

			~SndfileHandle (void) ;

			SndfileHandle (const SndfileHandle &orig) ;
			SndfileHandle & operator = (const SndfileHandle &rhs) ;

		/* Mainly for debugging/testing. */
		int refCount (void) const { return (p == NULL) ? 0 : p->ref ; }

		operator bool () const { return (p != NULL) ; }

		bool operator == (const SndfileHandle &rhs) const { return (p == rhs.p) ; }

		sf_count_t	frames (void) const		{ return p ? p->sfinfo.frames : 0 ; }
		int			format (void) const		{ return p ? p->sfinfo.format : 0 ; }
		int			channels (void) const	{ return p ? p->sfinfo.channels : 0 ; }
		int			samplerate (void) const { return p ? p->sfinfo.samplerate : 0 ; }

		int error (void) const ;
		const char * strError (void) const ;

		int command (int cmd, void *data, int datasize) ;

		sf_count_t	seek (sf_count_t frames, int whence) ;

		void writeSync (void) ;

		int setString (int str_type, const char* str) ;

		const char* getString (int str_type) const ;

		static int formatCheck (int format, int channels, int samplerate) ;

		sf_count_t read (short *ptr, sf_count_t items) ;
		sf_count_t read (int *ptr, sf_count_t items) ;
		sf_count_t read (float *ptr, sf_count_t items) ;
		sf_count_t read (double *ptr, sf_count_t items) ;

		sf_count_t write (const short *ptr, sf_count_t items) ;
		sf_count_t write (const int *ptr, sf_count_t items) ;
		sf_count_t write (const float *ptr, sf_count_t items) ;
		sf_count_t write (const double *ptr, sf_count_t items) ;

		sf_count_t readf (short *ptr, sf_count_t frames) ;
		sf_count_t readf (int *ptr, sf_count_t frames) ;
		sf_count_t readf (float *ptr, sf_count_t frames) ;
		sf_count_t readf (double *ptr, sf_count_t frames) ;

		sf_count_t writef (const short *ptr, sf_count_t frames) ;
		sf_count_t writef (const int *ptr, sf_count_t frames) ;
		sf_count_t writef (const float *ptr, sf_count_t frames) ;
		sf_count_t writef (const double *ptr, sf_count_t frames) ;

		sf_count_t	readRaw		(void *ptr, sf_count_t bytes) ;
		sf_count_t	writeRaw	(const void *ptr, sf_count_t bytes) ;

		/**< Raw access to the handle. SndfileHandle keeps ownership. */
		SNDFILE * rawHandle (void) ;

		/**< Take ownership of handle, if reference count is 1. */
		SNDFILE * takeOwnership (void) ;
} ;

/*==============================================================================
**	Nothing but implementation below.
*/

inline
SndfileHandle::SNDFILE_ref::SNDFILE_ref (void)
: sf (NULL), sfinfo (), ref (1)
{}

inline
SndfileHandle::SNDFILE_ref::~SNDFILE_ref (void)
{	if (sf != NULL) sf_close (sf) ; }

inline
SndfileHandle::SndfileHandle (const char *path, int mode, int fmt, int chans, int srate)
: p (NULL)
{
	p = new (std::nothrow) SNDFILE_ref () ;

	if (p != NULL)
	{	p->ref = 1 ;

		p->sfinfo.frames = 0 ;
		p->sfinfo.channels = chans ;
		p->sfinfo.format = fmt ;
		p->sfinfo.samplerate = srate ;
		p->sfinfo.sections = 0 ;
		p->sfinfo.seekable = 0 ;

		p->sf = sf_open (path, mode, &p->sfinfo) ;
		} ;

	return ;
} /* SndfileHandle const char * constructor */

inline
SndfileHandle::SndfileHandle (std::string const & path, int mode, int fmt, int chans, int srate)
: p (NULL)
{
	p = new (std::nothrow) SNDFILE_ref () ;

	if (p != NULL)
	{	p->ref = 1 ;

		p->sfinfo.frames = 0 ;
		p->sfinfo.channels = chans ;
		p->sfinfo.format = fmt ;
		p->sfinfo.samplerate = srate ;
		p->sfinfo.sections = 0 ;
		p->sfinfo.seekable = 0 ;

		p->sf = sf_open (path.c_str (), mode, &p->sfinfo) ;
		} ;

	return ;
} /* SndfileHandle std::string constructor */

inline
SndfileHandle::SndfileHandle (int fd, bool close_desc, int mode, int fmt, int chans, int srate)
: p (NULL)
{
	if (fd < 0)
		return ;

	p = new (std::nothrow) SNDFILE_ref () ;

	if (p != NULL)
	{	p->ref = 1 ;

		p->sfinfo.frames = 0 ;
		p->sfinfo.channels = chans ;
		p->sfinfo.format = fmt ;
		p->sfinfo.samplerate = srate ;
		p->sfinfo.sections = 0 ;
		p->sfinfo.seekable = 0 ;

		p->sf = sf_open_fd (fd, mode, &p->sfinfo, close_desc) ;
		} ;

	return ;
} /* SndfileHandle fd constructor */

inline
SndfileHandle::SndfileHandle (SF_VIRTUAL_IO &sfvirtual, void *user_data, int mode, int fmt, int chans, int srate)
: p (NULL)
{
	p = new (std::nothrow) SNDFILE_ref () ;

	if (p != NULL)
	{	p->ref = 1 ;

		p->sfinfo.frames = 0 ;
		p->sfinfo.channels = chans ;
		p->sfinfo.format = fmt ;
		p->sfinfo.samplerate = srate ;
		p->sfinfo.sections = 0 ;
		p->sfinfo.seekable = 0 ;

		p->sf = sf_open_virtual (&sfvirtual, mode, &p->sfinfo, user_data) ;
		} ;

	return ;
} /* SndfileHandle std::string constructor */

inline
SndfileHandle::~SndfileHandle (void)
{	if (p != NULL && --p->ref == 0)
		delete p ;
} /* SndfileHandle destructor */

inline
SndfileHandle::SndfileHandle (const SndfileHandle &orig)
: p (orig.p)
{	if (p != NULL)
		++p->ref ;
} /* SndfileHandle copy constructor */

inline SndfileHandle &
SndfileHandle::operator = (const SndfileHandle &rhs)
{
	if (&rhs == this)
		return *this ;
	if (p != NULL && --p->ref == 0)
		delete p ;

	p = rhs.p ;
	if (p != NULL)
		++p->ref ;

	return *this ;
} /* SndfileHandle assignment operator */

inline int
SndfileHandle::error (void) const
{	return sf_error (p->sf) ; }

inline const char *
SndfileHandle::strError (void) const
{	return sf_strerror (p->sf) ; }

inline int
SndfileHandle::command (int cmd, void *data, int datasize)
{	return sf_command (p->sf, cmd, data, datasize) ; }

inline sf_count_t
SndfileHandle::seek (sf_count_t frame_count, int whence)
{	return sf_seek (p->sf, frame_count, whence) ; }

inline void
SndfileHandle::writeSync (void)
{	sf_write_sync (p->sf) ; }

inline int
SndfileHandle::setString (int str_type, const char* str)
{	return sf_set_string (p->sf, str_type, str) ; }

inline const char*
SndfileHandle::getString (int str_type) const
{	return sf_get_string (p->sf, str_type) ; }

inline int
SndfileHandle::formatCheck (int fmt, int chans, int srate)
{
	SF_INFO sfinfo ;

	sfinfo.frames = 0 ;
	sfinfo.channels = chans ;
	sfinfo.format = fmt ;
	sfinfo.samplerate = srate ;
	sfinfo.sections = 0 ;
	sfinfo.seekable = 0 ;

	return sf_format_check (&sfinfo) ;
}

/*---------------------------------------------------------------------*/

inline sf_count_t
SndfileHandle::read (short *ptr, sf_count_t items)
{	return sf_read_short (p->sf, ptr, items) ; }

inline sf_count_t
SndfileHandle::read (int *ptr, sf_count_t items)
{	return sf_read_int (p->sf, ptr, items) ; }

inline sf_count_t
SndfileHandle::read (float *ptr, sf_count_t items)
{	return sf_read_float (p->sf, ptr, items) ; }

inline sf_count_t
SndfileHandle::read (double *ptr, sf_count_t items)
{	return sf_read_double (p->sf, ptr, items) ; }

inline sf_count_t
SndfileHandle::write (const short *ptr, sf_count_t items)
{	return sf_write_short (p->sf, ptr, items) ; }

inline sf_count_t
SndfileHandle::write (const int *ptr, sf_count_t items)
{	return sf_write_int (p->sf, ptr, items) ; }

inline sf_count_t
SndfileHandle::write (const float *ptr, sf_count_t items)
{	return sf_write_float (p->sf, ptr, items) ; }

inline sf_count_t
SndfileHandle::write (const double *ptr, sf_count_t items)
{	return sf_write_double (p->sf, ptr, items) ; }

inline sf_count_t
SndfileHandle::readf (short *ptr, sf_count_t frame_count)
{	return sf_readf_short (p->sf, ptr, frame_count) ; }

inline sf_count_t
SndfileHandle::readf (int *ptr, sf_count_t frame_count)
{	return sf_readf_int (p->sf, ptr, frame_count) ; }

inline sf_count_t
SndfileHandle::readf (float *ptr, sf_count_t frame_count)
{	return sf_readf_float (p->sf, ptr, frame_count) ; }

inline sf_count_t
SndfileHandle::readf (double *ptr, sf_count_t frame_count)
{	return sf_readf_double (p->sf, ptr, frame_count) ; }

inline sf_count_t
SndfileHandle::writef (const short *ptr, sf_count_t frame_count)
{	return sf_writef_short (p->sf, ptr, frame_count) ; }

inline sf_count_t
SndfileHandle::writef (const int *ptr, sf_count_t frame_count)
{	return sf_writef_int (p->sf, ptr, frame_count) ; }

inline sf_count_t
SndfileHandle::writef (const float *ptr, sf_count_t frame_count)
{	return sf_writef_float (p->sf, ptr, frame_count) ; }

inline sf_count_t
SndfileHandle::writef (const double *ptr, sf_count_t frame_count)
{	return sf_writef_double (p->sf, ptr, frame_count) ; }

inline sf_count_t
SndfileHandle::readRaw (void *ptr, sf_count_t bytes)
{	return sf_read_raw (p->sf, ptr, bytes) ; }

inline sf_count_t
SndfileHandle::writeRaw (const void *ptr, sf_count_t bytes)
{	return sf_write_raw (p->sf, ptr, bytes) ; }

inline SNDFILE *
SndfileHandle::rawHandle (void)
{	return (p ? p->sf : NULL) ; }

inline SNDFILE *
SndfileHandle::takeOwnership (void)
{
	if (p == NULL || (p->ref != 1))
		return NULL ;

	SNDFILE * sf = p->sf ;
	p->sf = NULL ;
	delete p ;
	p = NULL ;
	return sf ;
}

#ifdef ENABLE_SNDFILE_WINDOWS_PROTOTYPES

inline
SndfileHandle::SndfileHandle (LPCWSTR wpath, int mode, int fmt, int chans, int srate)
: p (NULL)
{
	p = new (std::nothrow) SNDFILE_ref () ;

	if (p != NULL)
	{	p->ref = 1 ;

		p->sfinfo.frames = 0 ;
		p->sfinfo.channels = chans ;
		p->sfinfo.format = fmt ;
		p->sfinfo.samplerate = srate ;
		p->sfinfo.sections = 0 ;
		p->sfinfo.seekable = 0 ;

		p->sf = sf_wchar_open (wpath, mode, &p->sfinfo) ;
		} ;

	return ;
} /* SndfileHandle const wchar_t * constructor */

#endif

#endif	/* SNDFILE_HH */


code:
; Auto-generated by create_symbols_file.py

LIBRARY libsndfile-1.dll
EXPORTS

sf_command           @1
sf_open              @2
sf_close             @3
sf_seek              @4
sf_error             @7
sf_perror            @8
sf_error_str         @9
sf_error_number      @10
sf_format_check      @11
sf_read_raw          @16
sf_readf_short       @17
sf_readf_int         @18
sf_readf_float       @19
sf_readf_double      @20
sf_read_short        @21
sf_read_int          @22
sf_read_float        @23
sf_read_double       @24
sf_write_raw         @32
sf_writef_short      @33
sf_writef_int        @34
sf_writef_float      @35
sf_writef_double     @36
sf_write_short       @37
sf_write_int         @38
sf_write_float       @39
sf_write_double      @40
sf_strerror          @50
sf_get_string        @60
sf_set_string        @61
sf_version_string    @68
sf_open_fd           @70
sf_wchar_open        @71
sf_open_virtual      @80
sf_write_sync        @90
sf_set_chunk         @100
sf_get_chunk_size    @101
sf_get_chunk_data    @102
sf_get_chunk_iterator @103
sf_next_chunk_iterator @104
sf_current_byterate  @110


code:
prefix=c:/devel/target/libsndfile
exec_prefix=${prefix}
libdir=${exec_prefix}/lib
includedir=${prefix}/include

Name: sndfile
Description: A library for reading and writing audio files
Requires:
Version: 1.0.28
Libs: -L${libdir} -lsndfile
Libs.private: Ext/libflac.la Ext/libvorbis.la Ext/libogg.la
Cflags: -I${includedir}


code:
#pragma once

// fake mss.h header for use with re3, to make using mss32.dll possible
// gta3 uses miles 6.1a
// check https://github.com/withmorten/re3mss for more info

#include <stdint.h>

typedef char C8;
typedef uint8_t U8;
typedef int8_t S8;
typedef int16_t S16;
typedef uint16_t U16;
typedef int32_t S32;
typedef uint32_t U32;
typedef float F32;
typedef double F64;

typedef void *HSTREAM;
typedef U32 HPROVIDER;
typedef void *H3DPOBJECT;
typedef H3DPOBJECT H3DSAMPLE;
typedef void *HSAMPLE;
typedef void *HDIGDRIVER;

typedef U32 HPROENUM;
#define HPROENUM_FIRST 0

typedef S32 M3DRESULT;

#define M3D_NOERR 0

enum { ENVIRONMENT_CAVE = 8 };

#define AIL_3D_2_SPEAKER 0
#define AIL_3D_HEADPHONE 1
#define AIL_3D_4_SPEAKER 3

#define DIG_MIXER_CHANNELS 1

#define DIG_F_MONO_16 1
#define DIG_PCM_SIGN 1

#define SMP_PLAYING 4

typedef struct _AILSOUNDINFO
{
	S32 format;
	void const *data_ptr;
	U32 data_len;
	U32 rate;
	S32 bits;
	S32 channels;
	U32 samples;
	U32 block_size;
	void const *initial_ptr;
} AILSOUNDINFO;

typedef U32 (WINAPI *AIL_file_open_callback)(char const * Filename, U32 * FileHandle);

typedef void (WINAPI *AIL_file_close_callback)(U32 FileHandle);

#define AIL_FILE_SEEK_BEGIN 0
#define AIL_FILE_SEEK_CURRENT 1
#define AIL_FILE_SEEK_END 2

typedef S32(WINAPI *AIL_file_seek_callback)(U32 FileHandle, S32 Offset, U32 Type);

typedef U32(WINAPI *AIL_file_read_callback)(U32 FileHandle, void* Buffer, U32 Bytes);

#ifdef RE3MSS_EXPORTS
#define RE3MSS_EXPORT __declspec(dllexport)
#else
#define RE3MSS_EXPORT __declspec(dllimport)
#endif

#ifdef __cplusplus
extern "C" {
#endif

RE3MSS_EXPORT S32 WINAPI AIL_enumerate_3D_providers(HPROENUM *next, HPROVIDER *dest, C8 **name);
RE3MSS_EXPORT void WINAPI AIL_release_3D_sample_handle(H3DSAMPLE S);
RE3MSS_EXPORT void WINAPI AIL_close_3D_provider(HPROVIDER lib);
RE3MSS_EXPORT void WINAPI AIL_set_3D_provider_preference(HPROVIDER lib, C8 const *name, void const *val);
RE3MSS_EXPORT M3DRESULT WINAPI AIL_open_3D_provider(HPROVIDER lib);
RE3MSS_EXPORT C8 *WINAPI AIL_last_error(void);
RE3MSS_EXPORT S32 WINAPI AIL_3D_room_type(HPROVIDER lib);
RE3MSS_EXPORT void WINAPI AIL_set_3D_room_type(HPROVIDER lib, S32 room_type);
RE3MSS_EXPORT void WINAPI AIL_3D_provider_attribute(HPROVIDER lib, C8 const *name, void *val);
RE3MSS_EXPORT H3DSAMPLE WINAPI AIL_allocate_3D_sample_handle(HPROVIDER lib);
RE3MSS_EXPORT void WINAPI AIL_set_3D_sample_effects_level(H3DSAMPLE S, F32 effects_level);
RE3MSS_EXPORT void WINAPI AIL_set_3D_speaker_type(HPROVIDER lib, S32 speaker_type);
RE3MSS_EXPORT HSTREAM WINAPI AIL_open_stream(HDIGDRIVER dig, C8 const *filename, S32 stream_mem);
RE3MSS_EXPORT void WINAPI AIL_stream_ms_position(HSTREAM S, S32 *total_milliseconds, S32 *current_milliseconds);
RE3MSS_EXPORT void WINAPI AIL_close_stream(HSTREAM stream);
RE3MSS_EXPORT S32 WINAPI AIL_digital_handle_release(HDIGDRIVER drvr);
RE3MSS_EXPORT S32 WINAPI AIL_digital_handle_reacquire(HDIGDRIVER drvr);
RE3MSS_EXPORT C8 *WINAPI AIL_set_redist_directory(C8 const *dir);
RE3MSS_EXPORT S32 WINAPI AIL_startup(void);
RE3MSS_EXPORT S32 WINAPI AIL_set_preference(U32 number, S32 value);
RE3MSS_EXPORT HDIGDRIVER WINAPI AIL_open_digital_driver(U32 frequency, S32 bits, S32 channel, U32 flags);
RE3MSS_EXPORT void *WINAPI AIL_mem_alloc_lock(U32 size);
RE3MSS_EXPORT HSAMPLE WINAPI AIL_allocate_sample_handle(HDIGDRIVER dig);
RE3MSS_EXPORT void WINAPI AIL_init_sample(HSAMPLE S);
RE3MSS_EXPORT void WINAPI AIL_set_sample_type(HSAMPLE S, S32 format, U32 flags);
RE3MSS_EXPORT void WINAPI AIL_pause_stream(HSTREAM stream, S32 onoff);
RE3MSS_EXPORT void WINAPI AIL_release_sample_handle(HSAMPLE S);
RE3MSS_EXPORT void WINAPI AIL_mem_free_lock(void *ptr);
RE3MSS_EXPORT void WINAPI AIL_close_digital_driver(HDIGDRIVER dig);
RE3MSS_EXPORT void WINAPI AIL_shutdown(void);
RE3MSS_EXPORT void WINAPI AIL_set_3D_sample_volume(H3DSAMPLE S, S32 volume);
RE3MSS_EXPORT void WINAPI AIL_set_sample_volume(HSAMPLE S, S32 volume);
RE3MSS_EXPORT void WINAPI AIL_set_sample_address(HSAMPLE S, void const *start, U32 len);
RE3MSS_EXPORT S32 WINAPI AIL_set_3D_sample_info(H3DSAMPLE S, AILSOUNDINFO const *info);
RE3MSS_EXPORT void WINAPI AIL_set_3D_position(H3DPOBJECT obj, F32 X, F32 Y, F32 Z);
RE3MSS_EXPORT void WINAPI AIL_set_3D_sample_distances(H3DSAMPLE S, F32 max_dist, F32 min_dist);
RE3MSS_EXPORT void WINAPI AIL_set_sample_pan(HSAMPLE S, S32 pan);
RE3MSS_EXPORT void WINAPI AIL_set_sample_playback_rate(HSAMPLE S, S32 playback_rate);
RE3MSS_EXPORT void WINAPI AIL_set_3D_sample_playback_rate(H3DSAMPLE S, S32 playback_rate);
RE3MSS_EXPORT void WINAPI AIL_set_sample_loop_block(HSAMPLE S, S32 loop_start_offset, S32 loop_end_offset);
RE3MSS_EXPORT void WINAPI AIL_set_3D_sample_loop_block(H3DSAMPLE S, S32 loop_start_offset, S32 loop_end_offset);
RE3MSS_EXPORT void WINAPI AIL_set_sample_loop_count(HSAMPLE S, S32 loop_count);
RE3MSS_EXPORT void WINAPI AIL_set_3D_sample_loop_count(H3DSAMPLE S, S32 loops);
RE3MSS_EXPORT U32 WINAPI AIL_sample_status(HSAMPLE S);
RE3MSS_EXPORT U32 WINAPI AIL_3D_sample_status(H3DSAMPLE S);
RE3MSS_EXPORT void WINAPI AIL_start_sample(HSAMPLE S);
RE3MSS_EXPORT void WINAPI AIL_start_3D_sample(H3DSAMPLE S);
RE3MSS_EXPORT void WINAPI AIL_end_sample(HSAMPLE S);
RE3MSS_EXPORT void WINAPI AIL_end_3D_sample(H3DSAMPLE S);
RE3MSS_EXPORT void WINAPI AIL_set_stream_loop_count(HSTREAM stream, S32 count);
RE3MSS_EXPORT S32 WINAPI AIL_service_stream(HSTREAM stream, S32 fillup);
RE3MSS_EXPORT void WINAPI AIL_start_stream(HSTREAM stream);
RE3MSS_EXPORT void WINAPI AIL_set_stream_ms_position(HSTREAM S, S32 milliseconds);
RE3MSS_EXPORT void WINAPI AIL_set_stream_volume(HSTREAM stream, S32 volume);
RE3MSS_EXPORT void WINAPI AIL_set_stream_pan(HSTREAM stream, S32 pan);
RE3MSS_EXPORT S32 WINAPI AIL_stream_status(HSTREAM stream);
RE3MSS_EXPORT void WINAPI AIL_set_file_callbacks(AIL_file_open_callback opencb, AIL_file_close_callback closecb, AIL_file_seek_callback seekcb, AIL_file_read_callback readcb);

#ifdef __cplusplus
}
#endif


code:
/*
	libmpg123: MPEG Audio Decoder library

	separate header just for audio format definitions not tied to
	library code

	copyright 1995-2020 by the mpg123 project
	free software under the terms of the LGPL 2.1
	see COPYING and AUTHORS files in distribution or http://mpg123.org
*/

#ifndef MPG123_ENC_H
#define MPG123_ENC_H

/** \file fmt123.h Audio format definitions. */

/** \defgroup mpg123_enc mpg123 PCM sample encodings
 *  These are definitions for audio formats used by libmpg123 and
 *  libout123.
 *
 * @{
 */

/** An enum over all sample types possibly known to mpg123.
 *  The values are designed as bit flags to allow bitmasking for encoding
 *  families.
 *  This is also why the enum is not used as type for actual encoding variables,
 *  plain integers (at least 16 bit, 15 bit being used) cover the possible
 *  combinations of these flags.
 *
 *  Note that (your build of) libmpg123 does not necessarily support all these.
 *  Usually, you can expect the 8bit encodings and signed 16 bit.
 *  Also 32bit float will be usual beginning with mpg123-1.7.0 .
 *  What you should bear in mind is that (SSE, etc) optimized routines may be
 *  absent for some formats. We do have SSE for 16, 32 bit and float, though.
 *  24 bit integer is done via postprocessing of 32 bit output -- just cutting
 *  the last byte, no rounding, even. If you want better, do it yourself.
 *
 *  All formats are in native byte order. If you need different endinaness, you
 *  can simply postprocess the output buffers (libmpg123 wouldn't do anything
 * else). The macro MPG123_SAMPLESIZE() can be helpful there.
 */
enum mpg123_enc_enum
{
/* 0000 0000 0000 1111 Some 8 bit  integer encoding. */
	MPG123_ENC_8      = 0x00f
/* 0000 0000 0100 0000 Some 16 bit integer encoding. */
,	MPG123_ENC_16     = 0x040
/* 0100 0000 0000 0000 Some 24 bit integer encoding. */
,	MPG123_ENC_24     = 0x4000
/* 0000 0001 0000 0000 Some 32 bit integer encoding. */
,	MPG123_ENC_32     = 0x100
/* 0000 0000 1000 0000 Some signed integer encoding. */
,	MPG123_ENC_SIGNED = 0x080
/* 0000 1110 0000 0000 Some float encoding. */
,	MPG123_ENC_FLOAT  = 0xe00
/* 0000 0000 1101 0000 signed 16 bit */
,	MPG123_ENC_SIGNED_16   = (MPG123_ENC_16|MPG123_ENC_SIGNED|0x10)
/* 0000 0000 0110 0000 unsigned 16 bit */
,	MPG123_ENC_UNSIGNED_16 = (MPG123_ENC_16|0x20)
/* 0000 0000 0000 0001 unsigned 8 bit */
,	MPG123_ENC_UNSIGNED_8  = 0x01
/* 0000 0000 1000 0010 signed 8 bit */
,	MPG123_ENC_SIGNED_8    = (MPG123_ENC_SIGNED|0x02)
/* 0000 0000 0000 0100 ulaw 8 bit */
,	MPG123_ENC_ULAW_8      = 0x04
/* 0000 0000 0000 1000 alaw 8 bit */
,	MPG123_ENC_ALAW_8      = 0x08
/* 0001 0001 1000 0000 signed 32 bit */
,	MPG123_ENC_SIGNED_32   = MPG123_ENC_32|MPG123_ENC_SIGNED|0x1000
/* 0010 0001 0000 0000 unsigned 32 bit */
,	MPG123_ENC_UNSIGNED_32 = MPG123_ENC_32|0x2000
/* 0101 0000 1000 0000 signed 24 bit */
,	MPG123_ENC_SIGNED_24   = MPG123_ENC_24|MPG123_ENC_SIGNED|0x1000
/* 0110 0000 0000 0000 unsigned 24 bit */
,	MPG123_ENC_UNSIGNED_24 = MPG123_ENC_24|0x2000
/* 0000 0010 0000 0000 32bit float */
,	MPG123_ENC_FLOAT_32    = 0x200
/* 0000 0100 0000 0000 64bit float */
,	MPG123_ENC_FLOAT_64    = 0x400
/* Any possibly known encoding from the list above. */
,	MPG123_ENC_ANY = ( MPG123_ENC_SIGNED_16  | MPG123_ENC_UNSIGNED_16
	                 | MPG123_ENC_UNSIGNED_8 | MPG123_ENC_SIGNED_8
	                 | MPG123_ENC_ULAW_8     | MPG123_ENC_ALAW_8
	                 | MPG123_ENC_SIGNED_32  | MPG123_ENC_UNSIGNED_32
	                 | MPG123_ENC_SIGNED_24  | MPG123_ENC_UNSIGNED_24
	                 | MPG123_ENC_FLOAT_32   | MPG123_ENC_FLOAT_64    )
};

/** Get size of one PCM sample with given encoding.
 *  This is included both in libmpg123 and libout123. Both offer
 *  an API function to provide the macro results from library
 *  compile-time, not that of you application. This most likely
 *  does not matter as I do not expect any fresh PCM sample
 *  encoding to appear. But who knows? Perhaps the encoding type
 *  will be abused for funny things in future, not even plain PCM.
 *  And, by the way: Thomas really likes the ?: operator.
 * \param enc the encoding (mpg123_enc_enum value)
 * \return size of one sample in bytes
 */
#define MPG123_SAMPLESIZE(enc) ( \
	(enc) < 1 \
	?	0 \
	:	( (enc) & MPG123_ENC_8 \
		?	1 \
		:	( (enc) & MPG123_ENC_16 \
			?	2 \
			:	( (enc) & MPG123_ENC_24 \
				?	3 \
				:	( (  (enc) & MPG123_ENC_32 \
					  || (enc) == MPG123_ENC_FLOAT_32 ) \
					?	4 \
					:	( (enc) == MPG123_ENC_FLOAT_64 \
						?	8 \
						:	0 \
)	)	)	)	)	)

/** Representation of zero in differing encodings.
 *  This exists to define proper silence in various encodings without
 *  having to link to libsyn123 to do actual conversions at runtime.
 *  You have to handle big/little endian order yourself, though.
 *  This takes the shortcut that any signed encoding has a zero with
 *  all-zero bits. Unsigned linear encodings just have the highest bit set
 *  (2^(n-1) for n bits), while the nonlinear 8-bit ones are special.
 *  \param enc the encoding (mpg123_enc_enum value)
 *  \param siz bytes per sample (return value of MPG123_SAMPLESIZE(enc))
 *  \param off byte (octet) offset counted from LSB
 *  \return unsigned byte value for the designated octet
 */
#define MPG123_ZEROSAMPLE(enc, siz, off) ( \
	(enc) == MPG123_ENC_ULAW_8 \
	?	(off == 0 ? 0xff : 0x00) \
	:	( (enc) == MPG123_ENC_ALAW_8 \
		?	(off == 0 ? 0xd5 : 0x00) \
		:	( (((enc) & (MPG123_ENC_SIGNED|MPG123_ENC_FLOAT)) || (siz) != ((off)+1)) \
			?	0x00 \
			:	0x80 \
	)	)	)

/** Structure defining an audio format.
 *  Providing the members as individual function arguments to define a certain
 *  output format is easy enough. This struct makes is more comfortable to deal
 *  with a list of formats.
 *  Negative values for the members might be used to communicate use of default
 *  values.
 */
struct mpg123_fmt
{
	long rate;    /**< sampling rate in Hz  */
	int channels; /**< channel count */
	/** encoding code, can be single value or bitwise or of members of
	 *  mpg123_enc_enum */
	int encoding;
};

/* @} */

#endif