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Fixed SDL 1.2 compatibility problem. The API specifies that SDL_OpenAudio() will fill out the 'desired' audio spec with the correct samples and size set by the driver. This value is important since it may be used by applications that size audio buffers, etc. However, we want to allow advanced applications to call SDL_OpenAudioDevice() which gets passed a const 'desired' parameter, and have the correct data filled into the 'obtained' parameter, possibly allowing or not allowing format changes. So... 'obtained' becomes the audio format the user callback is expected to use, and we add flags to allow the application to specify which format changes are allowed. Note: We really need to add a way to query the 'obtained' audio spec.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 13 Dec 2008 06:36:47 +0000
parents c9aa6bcb26f3
children a67a961e2171 8582c6a5ca16
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2 Simple DirectMedia Layer
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4 (SDL)
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6 Version 1.2
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8 ---
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9 http://www.libsdl.org/
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11 This is the Simple DirectMedia Layer, a general API that provides low
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12 level access to audio, keyboard, mouse, joystick, 3D hardware via OpenGL,
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13 and 2D framebuffer across multiple platforms.
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15 The current version supports Linux, Windows, Windows CE, BeOS, MacOS,
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16 Mac OS X, FreeBSD, NetBSD, OpenBSD, BSD/OS, Solaris, IRIX, and QNX.
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17 The code contains support for Dreamcast, Atari, AIX, OSF/Tru64,
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18 RISC OS, SymbianOS, and OS/2, but these are not officially supported.
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20 SDL is written in C, but works with C++ natively, and has bindings to
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21 several other languages, including Ada, C#, Eiffel, Erlang, Euphoria,
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22 Guile, Haskell, Java, Lisp, Lua, ML, Objective C, Pascal, Perl, PHP,
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23 Pike, Pliant, Python, Ruby, and Smalltalk.
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25 This library is distributed under GNU LGPL version 2, which can be
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26 found in the file "COPYING". This license allows you to use SDL
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27 freely in commercial programs as long as you link with the dynamic
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28 library.
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29
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30 The best way to learn how to use SDL is to check out the header files in
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31 the "include" subdirectory and the programs in the "test" subdirectory.
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32 The header files and test programs are well commented and always up to date.
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33 More documentation is available in HTML format in "docs/index.html", and
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34 a documentation wiki is available online at:
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35 http://www.libsdl.org/cgi/docwiki.cgi
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37 The test programs in the "test" subdirectory are in the public domain.
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38
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39 Frequently asked questions are answered online:
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40 http://www.libsdl.org/faq.php
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42 If you need help with the library, or just want to discuss SDL related
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43 issues, you can join the developers mailing list:
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44 http://www.libsdl.org/mailing-list.php
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46 Enjoy!
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47 Sam Lantinga (slouken@libsdl.org)
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