view decoders/timidity/CHANGES @ 562:7e08477b0fc1

MP3 decoder upgrade work. Ripped out SMPEG and mpglib support, replaced it with "mpg123.c" and libmpg123. libmpg123 is a much better version of mpglib, so it should solve all the problems about MP3's not seeking, or most modern MP3's not playing at all, etc. Since you no longer have to make a tradeoff with SMPEG for features, and SMPEG is basically rotting, I removed it from the project. There is still work to be done with libmpg123...there are MMX, 3DNow, SSE, Altivec, etc decoders which we don't have enabled at the moment, and the build system could use some work to make this compile more cleanly, etc. Still: huge win.
author Ryan C. Gordon <icculus@icculus.org>
date Fri, 30 Jan 2009 02:44:47 -0500
parents cbc2a4ffeeec
children
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This version of TiMidity should contain all the fixes from the
September 25 2003 SDL_mixer CVS snapshot. In addition, I've made some
changes of my own, e.g.:

* All file access is done through SDL_RWops. This means the MIDI
  stream no longer has to be a file. (The config file and instruments
  still have to be though.)

* Replacing of TiMidity's endian-handling with SDL's.

* Removal of much unused or unnecessary code, such as

  + The "hooks" for putting a user interface onto TiMidity.
  + The antialias filter. It wasn't active, and even at 4 kHz I
    couldn't hear any difference when activating it.
  + Removed all traces of LOOKUP_HACK and LOOKUP_INTERPOLATION.
    According to the code comments they weren't very good anyway.
    ("degrades sound quality noticeably"). I also removed the
    disclaimer about the "8-bit uLaw to 16-bit PCM and the 13-bit-PCM
    to 8-bit uLaw tables" disclaimer, since I believe those were the
    tables I removed.
  + Removed LOOKUP_SINE since it was already commented out. I think we
    can count on our target audience having math co-processors
    nowadays.
  + Removed USE_LDEXP since it wasn't being used and "it doesn't make
    much of a difference either way".
  + Removed decompress hack from open_file() since it didn't look very
    portable.
  + Removed heaps of unnecessary constants.
  + Removed unused functions.
  + Assume that LINEAR_INTERPOLATION is always used, so remove all
    code dealing with it not being so. It's not that I think the
    difference in audio quality is that great, but since it wouldn't
    compile without code changes I assume no one's used it for quite
    some time...
  + Assume PRECALC_LOOPS is always defined. Judging by the comments it
    may not make much of a difference either way, so why maintain two
    versions of the same code?

* Moving several static globals into the MidiSong struct. This
  includes sample rate, formate, etc. which are now all per-song.

* Moved some typedefs (e.g. MidiSong) to timidity.h for easy inclusion
  into the MIDI decoder.

* Added free_pathlist().

* Replaced TiMidity's own 8, 16 and 32-bit types with SDL's.

* Made TiMidity look for its configuration file in both /etc and
  /usr/local/lib/timidity. (Windows version remains unchanged.)

* Timidity_PlaySome() now takes three arguments. A MidiSong, a decode
  buffer and decode buffer size in bytes. (MidiSong is a new argument,
  and buffer size used to be in samples.)

  In addition, it will return the number of bytes decoded.

* Added Timidity_Exit().

* Removed Timidity_Stop() and Timidity_Active(). Stopping playback
  should be handled by SDL_sound, and Timidity_PlaySome() will return
  0 when the MIDI stream is finished.

* Modified the ToneBank stuff to allow some data to be shared between
  MidiSongs.

* The following files have been removed: controls.c, controls.h,
  filter.c, filter.h, sdl_a.c, sdl_c.c

* config.h has been renamed as options.h to avoid confusion with the
  automatically generated config.h for SDL_sound.

* Added support for loading DLS format instruments:
	Timidity_LoadDLS(), Timidity_FreeDLS(), Timidity_LoadDLSSong()

* Added Timidity_Init_NoConfig()