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[16.git] / src / lib / dl / ext / libmad / readme

diff --git a/src/lib/dl/ext/libmad/readme b/src/lib/dl/ext/libmad/readme
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-libmad library.
-Ported to MS-DOS/OpenWatcom by Jonathan Campbell.
-
-
-Notes:
-
-- The Sound Blaster MP3 player uses the same codebase as the test.exe
-  executable under hw/sndsb, except that some modes have been removed
-  and the code rewritten to decode and play back MP3 data.
-
-- If your DOS machine has no sound card, but does have the traditional
-  "PC Speaker", you can use playspkr.exe to play the MP3 through the
-  internal beeper (using the old DPCM trick). However there may be
-  slight audio glitches depending on background processes,
-  interrupts, and disk I/O. Make sure your DOS extender and CPU are
-  fast enough to service interrupts at a high timer tick rate.
-  Playback will also not sound very good if the "PC speaker" is not
-  an actual speaker, such as the piezoelectric ones on laptops.
-
-- If you have a Gravis Ultrasound, use the playgus.exe MP3 player.
-  The Sound Blaster version does NOT work with SBOS or MEGA-EM despite
-  my best efforts.
-
-- If you have a LPT parallel port, you can use the LPT DAC version,
-  playlpt.exe. Though playback up to 44.1KHz is supported, it may
-  not be possibly depending on whether or not the parallel port
-  delays I/O for compatability reasons, or any other sources of
-  latency.
-
-- Experimental: If you have a Covox Sound Master, try playsm.exe.
-  Since I don't actually have a Covox Sound Master, I don't know whether
-  this works on real hardware.
-
-
-
-TODO LIST:
- - 16-bit real-mode MP3 decoding. Currently, libmad seems to compile properly
-   only for 32-bit flat protected mode. I got it to "sort of" compile for
-   16-bit large memory model builds, but it doesn't work properly and it seems
-   to cause memory corruption as well.
-
-   Specification for 16-bit real mode: Take libmad, valgrind it under Linux to
-   catch all possible problems, then incorporate the validated code into this
-   source tree. That will be the 32-bit build. Then, take the libmad source
-   code, put it under a separate directory (libmad16), modify it to use
-   14-bit precision and math that favors 16-bit integers (what will fit into
-   real-mode 8086 CPU registers), and incorporate that into /etc/libmad16.
-   Copy over the test programs here and compile them with it, to produce the
-   16-bit real mode builds. Make the makefile for libmad16 so that it only
-   produces binaries for 16-bit real mode builds. If the differences are
-   minimal enough, you could merge the two source trees into one project
-   that can produce a fast high quality decode for 386+ systems, and a faster
-   (less precise) decoder for systems as low as an 8086.
-