interpreter/lib/src/libsndfile-1.0.25/doc/index.html

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   6         libsndfile
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  40
  41 <br><br>
  42 <P>
  43         Libsndfile is a C library for reading and writing files containing sampled sound
  44         (such as MS Windows WAV and the Apple/SGI AIFF format) through one standard
  45         library interface. It is released in source code format under the
  46                 <A HREF="http://www.gnu.org/copyleft/lesser.html">Gnu Lesser General Public License</A>.
  47 </P>
  48 <!-- pepper -->
  49 <P>
  50         The library was written to compile and run on a Linux system but should compile
  51         and run on just about any Unix (including MacOS X).
  52         There are also pre-compiled binaries available for 32 and 64 bit windows.
  53 </P>
  54 <P>
  55         It was designed to handle both little-endian (such as WAV) and big-endian
  56         (such as AIFF) data, and to compile and run correctly on little-endian (such as Intel
  57         and DEC/Compaq Alpha) processor systems as well as big-endian processor systems such
  58         as Motorola 68k, Power PC, MIPS and Sparc.
  59         Hopefully the design of the library will also make it easy to extend for reading and
  60         writing new sound file formats.
  61 </P>
  62 <!-- pepper -->
  63 <P>
  64     It has been compiled and tested (at one time or another) on the following systems:
  65 </P>
  66 <!-- pepper -->
  67 <UL>
  68         <LI>Every platform supported by Debian GNU/Linux including x86_64-linux-gnu,
  69                 i486-linux-gnu, powerpc-linux-gnu, sparc-linux-gnu, alpha-linux-gnu,
  70                 mips-linux-gnu and armel-linux-gnu.</LI>
  71         <LI>arm-linux-androideab (Android phones OS)</LI>
  72         <LI>powerpc-apple-darwin7.0 (Mac OS X 10.3)</LI>
  73         <LI>sparc-sun-solaris2.8 (using gcc)</LI>
  74         <LI>mips-sgi-irix5.3 (using gcc)</LI>
  75         <LI>QNX 6.0</LI>
  76         <LI>i386-unknown-openbsd2.9</LI>
  77 </UL>
  78 <!-- pepper -->
  79 <P>
  80         At the moment, each new release is being tested on i386 Linux, x86_64 Linux,
  81         PowerPC Linux, Win32 and Win64.
  82 </P>
  83 <!-- pepper -->
  84
  85 <A NAME="Capabilities"></A>
  86 <A NAME="Features"></A>
  87 <H1><B>Features</B></H1>
  88 <P>
  89         libsndfile has the following main features :
  90 </P>
  91         <UL>
  92         <lI> Ability to read and write a large number of file formats.
  93         <LI> A simple, elegant and easy to use Applications Programming Interface.
  94         <LI> Usable on Unix, Win32, MacOS and others.
  95         <LI> On the fly format conversion, including endian-ness swapping, type conversion
  96                         and bitwidth scaling.
  97         <LI> Optional normalisation when reading floating point data from files containing
  98                         integer data.
  99         <LI> Ability to open files in read/write mode.
 100         <LI> The ability to write the file header without closing the file (only on files
 101                         open for write or read/write).
 102         <LI> Ability to query the library about all supported formats and retrieve text
 103                         strings describing each format.
 104         </UL>
 105 <P>
 106         libsndfile has a comprehensive test suite so that each release is as bug free
 107         as possible.
 108         When new bugs are found, new tests are added to the test suite to ensure that
 109         these bugs don't creep back into the code.
 110         When new features are added, tests are added to the test suite to make sure that
 111         these features continue to work correctly even when they are old features.
 112  </P>
 113 <P>
 114         The following table lists the file formats and encodings that libsndfile can read
 115         and write.
 116         The file formats are arranged across the top and encodings along the left
 117         edge.
 118 </P>
 119 <br>
 120
 121 <TABLE BORDER="1" cellpadding="2">
 122         <TR><TD>&nbsp;</TD>
 123         <TD ALIGN="center">Micro- soft<br>WAV</TD>
 124         <TD ALIGN="center">SGI / Apple<br>AIFF / AIFC</TD>
 125         <TD ALIGN="center">Sun / DEC /<br>NeXT<br>AU / SND</TD>
 126         <TD ALIGN="center">Header- less<br>RAW</TD>
 127         <TD ALIGN="center">Paris Audio<br>File<br>PAF</TD>
 128         <TD ALIGN="center">Commo- dore<br>Amiga<br>IFF / SVX</TD>
 129         <TD ALIGN="center">Sphere<br>Nist<br>WAV</TD>
 130         <TD ALIGN="center">IRCAM<br>SF</TD>
 131         <TD ALIGN="center">Creative<br>VOC</TD>
 132         <TD ALIGN="center">Sound forge<br>W64</TD>
 133         <TD ALIGN="center"><A HREF="octave.html">GNU Octave 2.0</A><br>MAT4</TD>
 134         <TD ALIGN="center"><A HREF="octave.html">GNU Octave 2.1</A><br>MAT5</TD>
 135         <TD ALIGN="center">Portable Voice Format<br>PVF</TD>
 136         <TD ALIGN="center">Fasttracker 2<br>XI</TD>
 137         <TD ALIGN="center">HMM Tool Kit<br>HTK</TD>
 138         <TD ALIGN="center">Apple<br>CAF</TD>
 139         <TD ALIGN="center">Sound<br>Designer II<br>SD2</TD>
 140         <TD ALIGN="center">Free Lossless Audio Codec<br>FLAC</TD>
 141         </TR>
 142 <TR><TD>Unsigned 8 bit PCM</TD>
 143         <TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD><TD>&nbsp;</TD><TD ALIGN="center">R/W</TD>
 144         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD ALIGN="center">R/W</TD>
 145         <TD ALIGN="center">R/W</TD><TD>&nbsp;</TD><TD ALIGN="center">R/W</TD><TD>&nbsp;</TD>
 146         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 147 </TR>
 148
 149 <TR><TD>Signed 8 bit PCM</TD>
 150         <TD>&nbsp;</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD>
 151         <TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD><TD>&nbsp;</TD>
 152         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD ALIGN="center">R/W</TD>
 153         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD>
 154 </TR>
 155
 156 <TR><TD>Signed 16 bit PCM</TD>
 157         <TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD>
 158         <TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD>
 159         <TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD>
 160         <TD ALIGN="center">R/W</TD><TD>&nbsp;</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD>
 161         <TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD>
 162 </TR>
 163
 164 <TR><TD>Signed 24 bit PCM</TD>
 165         <TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD>
 166         <TD ALIGN="center">R/W</TD><TD>&nbsp;</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD>
 167         <TD>&nbsp;</TD><TD ALIGN="center">R/W</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 168         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD>
 169 </TR>
 170
 171 <TR><TD>Signed 32 bit PCM</TD>
 172         <TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD>
 173         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD><TD>&nbsp;</TD>
 174         <TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD>
 175         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD ALIGN="center">R/W</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 176 </TR>
 177
 178 <TR><TD>32 bit float</TD>
 179         <TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD>
 180         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD ALIGN="center">R/W</TD><TD>&nbsp;</TD>
 181         <TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD><TD>&nbsp;</TD>
 182         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD ALIGN="center">R/W</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 183 </TR>
 184
 185 <TR><TD>64 bit double</TD>
 186         <TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD>
 187         <TD ALIGN="center">R/W</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 188         <TD>&nbsp;</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD>
 189         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD ALIGN="center">R/W</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 190 </TR>
 191
 192 <TR><TD>u-law encoding</TD>
 193         <TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD>
 194         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD>
 195         <TD ALIGN="center">R/W</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 196         <TD ALIGN="center">R/W</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 197 </TR>
 198 <TR><TD>A-law encoding</TD>
 199         <TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD>
 200         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD>
 201         <TD ALIGN="center">R/W</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 202         <TD ALIGN="center">R/W</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 203 </TR>
 204
 205 <TR><TD>IMA ADPCM</TD>
 206         <TD ALIGN="center">R/W</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 207         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD ALIGN="center">R/W</TD>
 208         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 209         <TD>&nbsp;</TD><TD>&nbsp;</TD>
 210 </TR>
 211
 212 <TR><TD>MS ADPCM</TD>
 213         <TD ALIGN="center">R/W</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 214         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD ALIGN="center">R/W</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 215         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 216 </TR>
 217
 218 <TR><TD>GSM 6.10</TD>
 219         <TD ALIGN="center">R/W</TD><TD ALIGN="center">R/W</TD><TD>&nbsp;</TD><TD ALIGN="center">R/W</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 220         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD ALIGN="center">R/W</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 221         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 222 </TR>
 223
 224 <TR><TD>G721 ADPCM 32kbps</TD>
 225         <TD ALIGN="center">R/W</TD><TD>&nbsp;</TD><TD ALIGN="center">R/W</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 226         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 227         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 228 </TR>
 229
 230 <TR><TD>G723 ADPCM 24kbps</TD>
 231         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD ALIGN="center">R/W</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 232         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 233         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 234 </TR>
 235
 236 <TR><TD>G723 ADPCM 40kbps</TD>
 237         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD ALIGN="center">R/W</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 238         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 239         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 240 </TR>
 241
 242 <TR><TD>12 bit DWVW</TD>
 243         <TD>&nbsp;</TD><TD ALIGN="center">R/W</TD><TD>&nbsp;</TD><TD ALIGN="center">R/W</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 244         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 245         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 246 </TR>
 247
 248 <TR><TD>16 bit DWVW</TD>
 249         <TD>&nbsp;</TD><TD ALIGN="center">R/W</TD><TD>&nbsp;</TD><TD ALIGN="center">R/W</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 250         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 251         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 252 </TR>
 253
 254 <TR><TD>24 bit DWVW</TD>
 255         <TD>&nbsp;</TD><TD ALIGN="center">R/W</TD><TD>&nbsp;</TD><TD ALIGN="center">R/W</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 256         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 257         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 258 </TR>
 259 <TR><TD>Ok Dialogic ADPCM</TD>
 260         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD ALIGN="center">R/W</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 261         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 262         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 263 </TR>
 264 <TR><TD>8 bit DPCM</TD>
 265         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 266         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 267         <TD>&nbsp;</TD><TD ALIGN="center">R/W</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 268 </TR>
 269 <TR><TD>16 bit DPCM</TD>
 270         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 271         <TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 272         <TD>&nbsp;</TD><TD ALIGN="center">R/W</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
 273 </TR>
 274 </TABLE>
 275
 276 <p>
 277 From version 1.0.18, libsndfile also reads and writes
 278         <a href="http://flac.sourceforge.net/">FLAC</a>
 279 and
 280         <a href="http://www.vorbis.com/">Ogg/Vorbis</a>.
 281 </p>
 282
 283 <!-- pepper -->
 284
 285 <P>
 286         Some of the file formats I am also interested in adding are:
 287 </P>
 288         <UL>
 289         <LI> Kurzweil K2000 sampler files.
 290         <LI> Ogg Speex.
 291         </UL>
 292 <P>
 293         I have decided that I will not be adding support for MPEG Layer 3 (commonly
 294         known as MP3) due to the patent issues surrounding this file format.
 295         See
 296                 <a href="http://www.mega-nerd.com/libsndfile/FAQ.html#Q020">
 297                 the FAQ</a>
 298         for more.
 299 </P>
 300 <P>
 301         Other file formats may also be added on request.
 302 </P>
 303
 304 <!-- pepper -->
 305
 306 <A NAME="History"></A>
 307 <H1><B>History</B></H1>
 308 <P>
 309         My first attempt at reading and writing WAV files was in 1990 or so under Windows
 310         3.1.
 311         I started using Linux in early 1995 and contributed some code to the
 312                 <A HREF="http://www.vaxxine.com/ve3wwg/gnuwave.html">wavplay</A>
 313         program.
 314         That contributed code would eventually mutate into this library.
 315         As one of my interests is Digital Signal Processing (DSP) I decided that as well as
 316         reading data from an audio file in the native format (typically 16 bit short integers)
 317         it would also be useful to be able to have the library do the conversion to floating
 318         point numbers for DSP applications.
 319         It then dawned on me that whatever file format (anything from 8 bit unsigned chars,
 320         to 32 bit floating point numbers) the library should be able to convert the data to
 321         whatever format the library user wishes to use it in.
 322         For example, in a sound playback program, the library caller typically wants the sound
 323         data in 16 bit short integers to dump into a sound card even though the data in the
 324         file may be 32 bit floating point numbers (ie Microsoft's WAVE_FORMAT_IEEE_FLOAT
 325         format).
 326         Another example would be someone doing speech recognition research who has recorded
 327         some speech as a 16 bit WAV file but wants to process it as double precision floating
 328         point numbers.
 329 </P>
 330 <P>
 331     Here is the release history for libsndfile :
 332 </P>
 333         <UL>
 334         <LI>Version 0.0.8 (Feb 15 1999) First official release.
 335         <LI>Version 0.0.28 (Apr 26 2002) Final release of version 0 of libsndfile.
 336         <LI>Version 1.0.0rc1 (Jun 24 2002) Release candidate 1 of version 1 of libsndfile.
 337         <LI>Version 1.0.0rc6 (Aug 14 2002) MacOS 9 fixes.
 338         <LI>Version 1.0.0 (Aug 16 2002) First 1.0.X release.
 339         <LI>Version 1.0.1 (Sep 14 2002) Added MAT4 and MAT5 file formats.
 340         <LI>Version 1.0.2 (Nov 24 2002) Added VOX ADPCM format.
 341         <LI>Version 1.0.3 (Dec 09 2002) Fixes for Linux on ia64 CPUs.
 342         <LI>Version 1.0.4 (Feb 02 2003) New file formats and functionality.
 343         <LI>Version 1.0.5 (May 03 2003) One new file format and new functionality.
 344         <LI>Version 1.0.6 (Feb 08 2004) Large file fix for Linux/Solaris, new functionality
 345                 and Win32 improvements.
 346         <LI>Version 1.0.7 (Feb 24 2004) Fix build problems on MacOS X and fix ia64/MIPS etc
 347                 clip mode detction.
 348         <LI>Version 1.0.8 (Mar 14 2004) Minor bug fixes.
 349         <LI>Version 1.0.9 (Mar 30 2004) Add AVR format. Improve handling of some WAV files.
 350         <LI>Version 1.0.10 (Jun 15 2004) Minor bug fixes. Fix support for Win32 MinGW compiler.
 351         <LI>Version 1.0.11 (Nov 15 2004) Add SD2 file support, reading of loop data in WAV and AIFF.
 352                                 Minor bug fixes.
 353         <LI>Version 1.0.12 (Sep 30 2005) Add FLAC and CAF file support, virtual I/O interface.
 354                                 Minor bug fixes and cleanups.
 355         <LI>Version 1.0.13 (Jan 21 2006) Add read/write of instrument chunks. Minor bug fixes.
 356         <LI>Version 1.0.14 (Feb 19 2006) Minor bug fixes. Start shipping windows binary/source ZIP.
 357         <LI>Version 1.0.15 (Mar 16 2006) Minor bug fixes.
 358         <LI>Version 1.0.16 (Apr 30 2006) Add support for RIFX. Other minor feature enhancements and
 359                                 bug fixes.
 360         <LI>Version 1.0.17 (Aug 31 2006) Add C++ wrapper sndfile.hh. Minor bug fixes and cleanups.
 361         <LI>Version 1.0.18 (Feb 07 2009) Add Ogg/Vorbis suppport, remove captive libraries, many
 362                                 new features and bug fixes. Generate Win32 and Win64 pre-compiled binaries.
 363         <LI>Version 1.0.19 (Mar 02 2009) Fix for CVE-2009-0186. Huge number of minor fixes as a
 364                                 result of static analysis.
 365         <LI>Version 1.0.20 (May 14 2009) Fix for potential heap overflow.
 366         <LI>Version 1.0.21 (December 13 2009) Bunch of minor bug fixes.
 367         <LI>Version 1.0.22 (October 04 2010) Bunch of minor bug fixes.
 368         <LI>Version 1.0.23 (October 10 2010) Minor bug fixes.
 369         <LI>Version 1.0.24 (March 23 2011) Minor bug fixes.
 370         <LI>Version 1.0.25 (July 13 2011) Fix for Secunia Advisory SA45125. Minor bug fixes and
 371                                 improvements.
 372         </UL>
 373
 374 <A NAME="Similar"></A>
 375 <H1><B>Similar or Related Projects</B></H1>
 376
 377         <UL>
 378         <LI><A HREF="http://sox.sourceforge.net/">SoX</A> is a program for
 379                 converting between sound file formats.
 380         <LI><A HREF="http://www.hitsquad.com/smm/programs/WavPlay/">Wavplay</A> started out
 381                 as a minimal WAV file player under Linux and has mutated into Gnuwave, a client/server
 382                 application for more general multimedia and games sound playback.
 383         <LI><A HREF="http://www.68k.org/~michael/audiofile/">Audiofile</A> (libaudiofile) is
 384                 a library similar to libsndfile but with a different programming interface. The
 385                 author Michael Pruett has set out to clone (and fix some bugs in) the libaudiofile
 386                 library which ships with SGI's IRIX OS.
 387         <LI><A HREF="ftp://ccrma-ftp.stanford.edu/pub/Lisp/sndlib.tar.gz">sndlib.tar.gz</A> is
 388                 another library written by Bill Schottstaedt of CCRMA.
 389         </UL>
 390
 391 <A NAME="Licensing"></A>
 392 <H1><B>Licensing</B></H1>
 393 <P>
 394         libsndfile is released under the terms of the GNU Lesser General Public License,
 395         of which there are two versions;
 396                 <a href="http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html">version 2.1</a>
 397         and
 398                 <a href="http://www.gnu.org/copyleft/lesser.html">version 3</a>.
 399         To maximise the compatibility of libsndfile, the user may choose to use libsndfile
 400         under either of the above two licenses.
 401         You can also read a simple explanation of the ideas behind the GPL and the LGPL
 402                 <A HREF="http://www.gnu.org/copyleft/copyleft.html">here</A>.
 403 </P>
 404 <P>
 405         You can use libsndfile with
 406                 <A HREF="http://www.gnu.org/">Free Software</A>,
 407                 <A HREF="http://www.opensource.org/">Open Source</A>,
 408         proprietary, shareware or other closed source applications as long as libsndfile
 409         is used as a dynamically loaded library and you abide by a small number of other
 410         conditions (read the LGPL for more info).
 411         With applications released under the GNU GPL you can also use libsndfile statically
 412         linked to your application.
 413 </P>
 414 <P>
 415         I would like to see libsndfile used as widely as possible but I would prefer it
 416         if you released software that uses libsndfile as
 417                 <A HREF="http://www.gnu.org/">Free Software</A>
 418         or
 419                 <A HREF="http://www.opensource.org/">Open Source</A>.
 420         However, if you put in a great deal of effort building a significant application
 421         which simply uses libsndfile for file I/O, then I have no problem with you releasing
 422         that as closed source and charging as much money as you want for it as long as you
 423         abide by <A HREF="http://www.gnu.org/copyleft/lesser.html">the license</A>.
 424 </P>
 425
 426 <A NAME="Download"></A>
 427 <H1><B>Download</B></H1>
 428 <P>
 429         Here is the latest version. It is available in the following formats:
 430 </P>
 431         <UL>
 432         <LI>Source code as a .tar.gz :
 433                         <A HREF="files/libsndfile-1.0.25.tar.gz">libsndfile-1.0.25.tar.gz</A>
 434                         and
 435                         <A HREF="files/libsndfile-1.0.25.tar.gz.asc">(GPG signature)</A>.
 436         <LI>Win32 installer:
 437                         <A HREF="files/libsndfile-1.0.25-w32-setup.exe">
 438                         libsndfile-1.0.25-w32-setup.exe</A> (thoroughly tested under
 439                         <a href="http://www.winehq.com/">Wine</a> and Windows XP).
 440         <LI>Win64 installer:
 441                         <A HREF="files/libsndfile-1.0.25-w64-setup.exe">
 442                         libsndfile-1.0.25-w64-setup.exe</A>
 443                         (thoroughly tested on 64 bit Windows 7).
 444         </UL>
 445
 446 <P>
 447 The Win32 installer was compiled for Windows XP but should also work on Windows
 448 2000, Vista and Windows 7.
 449 </p>
 450
 451 <P>
 452         Pre-release versions of libsndfile are available
 453                         <A HREF="http://www.mega-nerd.com/tmp/">here</A>
 454         and are announced on the
 455                         <A HREF="lists.html">libsndfile-devel</A>
 456         mailing list.
 457 </P>
 458
 459 <A NAME="SeeAlso"></A>
 460 <H1><B>See Also</B></H1>
 461         <UL>
 462         <LI><a href="http://www.mega-nerd.com/libsndfile/tools/">
 463                 sndfile-tools</a>
 464                 : a small collection of programs which use libsndfile.
 465         </UL>
 466
 467 <br><br>
 468
 469 <hr>
 470
 471 <P>
 472         The latest version of this document can be found
 473                 <A HREF="http://www.mega-nerd.com/libsndfile/">here</A>.
 474 </P>
 475 <P>
 476 Author :
 477         <A HREF="m&#97;ilt&#111;:&#101;rikd&#64;&#109;eg&#97;-&#110;erd.&#99;om">
 478                 Erik de Castro Lopo</a>
 479 </P>
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