Tremor

From XiphWiki

(Difference between revisions)
Jump to: navigation, search
(ARM CPUs)
(ARM/Coldfire/MIPS CPUs)
Line 9: Line 9:
svn co http://svn.xiph.org/trunk/Tremor/
svn co http://svn.xiph.org/trunk/Tremor/
-
It contains some optimizations for ARM and overall the lowest computational complexity and should run on most devices with a few hundred KB of codec RAM.
+
It contains some optimizations for ARM and the overall lowest computational complexity.  It should run on most devices with a few hundred KB of codec RAM.
== Texas Instruments TMS320C55x DSP Family ==
== Texas Instruments TMS320C55x DSP Family ==

Revision as of 04:23, 16 March 2010

Tremor is a fixed-point version of the Ogg Vorbis decoder for those platforms that can't do floating point math.

Contents

Platforms

ARM/Coldfire/MIPS CPUs

You will probably want to use the Tremor main branch. You can check it out here:

svn co http://svn.xiph.org/trunk/Tremor/

It contains some optimizations for ARM and the overall lowest computational complexity. It should run on most devices with a few hundred KB of codec RAM.

Texas Instruments TMS320C55x DSP Family

Download the generic lowmem source using Subversion. This is probably the version you want to start working with for a DSP, but maybe slower on normal CPUs.

svn co http://svn.xiph.org/branches/lowmem-branch/Tremor/

There is also a no-byte branch for platforms whose smallest data unit is larger than 8 bits.

Required / Suggested Changes to the code as downloaded:

  • Roland Wintersteller's various fixes

See the mailing list entry

  • Johannes Sandvall's performance improvements

See the mailing list entry or just download

  • alloca removal

The TI compiler does not support this.

  • misc compiler warning fixes
  • hooks to TI DSPLIB functions cfft3216_NOSCALE and cbrev32

These are part of the TI DSPLIB which can be downloaded from the TI website.

Links

Retrieved from "http://wiki.xiph.org/Tremor"
Personal tools


Main Page

Xiph.Org Projects

Audio—

Video—

Text—

Container—

Streaming—