INSTALL.txt
author Sam Lantinga
Sat, 08 Jun 2019 18:22:18 -0700
changeset 12803 70d338e248c8
parent 10893 54480745c410
permissions -rw-r--r--
Fixed bug 4294 - Audio: perform more validation on conversion request

janisozaur

There are many cases which are not able to be handled by SDL's audio conversion routines, including too low (negative) rate, too high rate (impossible to allocate).

This patch aims to report such issues early and handle others in a graceful manner. The "INT32_MAX / RESAMPLER_SAMPLES_PER_ZERO_CROSSING" value is the conservative approach in terms of what can _technically_ be supported, but its value is 4'194'303, or just shy of 4.2MHz. I highly doubt any sane person would use such rates, especially in SDL2, so I would like to drive this limit further down, but would need some assistance to do that, as doing so would have to introduce an arbitrary value. Are you OK with such approach? What would a good value be? Wikipedia (https://en.wikipedia.org/wiki/High-resolution_audio) lists 96kHz as the highest sampling rate in use, even if I quadruple it for a good measure, to 384kHz it's still an order of magnitude lower than 4MHz.
     1 
     2 To compile and install SDL:
     3 
     4     1.  Windows with Visual Studio:
     5         * Read VisualC.html
     6 
     7         Windows with gcc, either native or cross-compiling:
     8         * Read the FAQ at https://wiki.libsdl.org/moin.fcg/FAQWindows
     9         * Run './configure; make; make install'
    10 
    11         Mac OS X with Xcode:
    12         * Read docs/README-macosx.md
    13 
    14         Mac OS X from the command line:
    15         * Run './configure; make; make install'
    16 
    17         Linux and other UNIX systems:
    18         * Run './configure; make; make install'
    19 
    20         Android:
    21         * Read docs/README-android.md
    22 
    23         iOS:
    24         * Read docs/README-ios.md
    25 
    26         Using Cmake:
    27         * Read docs/README-cmake.md
    28 
    29     2.  Look at the example programs in ./test, and check out the online
    30         documentation at https://wiki.libsdl.org/
    31 
    32     3.  Join the SDL developer mailing list by sending E-mail to
    33     	sdl-request@libsdl.org
    34         and put "subscribe" in the subject of the message.
    35 
    36         Or alternatively you can use the web interface:
    37             https://www.libsdl.org/mailing-list.php
    38 
    39 That's it!
    40 Sam Lantinga <slouken@libsdl.org>