ARM Open Source Codecs[MPlayer]

Leaf_KA

                Introduction
There are a number of open source codecs available that will run on
an ARM, which make them suitable for devices like DM355, DM6446, or
OMAP3. Below are a list of projects you may find useful and
instructions to assist you in your port.
MP3 - madplay
madplay is an MPEG Audio Decoder player, available from:
http://www.underbit.com/products/mad/

These instructions are for ARM9 using MV Tools, and may need
to be modified for other devices. See the README included with madplay
for further instructions.

Download libid3tag, libmad, and madplay tars from the above URL, then untar on host

Add Montavista tools to your path (e.g. host# export PATH=/opt/montavista/pro/devkit/arm/v5t_le/bin:$PATH)

To compile libmad: host# cd libmad-x.x.x

Configure libmad for cross compile, where prefix is your desired installation directory: host# ./configure --prefix=/home/user/target/opt/madplayer CC=arm_v5t_le-gcc --host=arm-linux

Make and install via: host# make then host# make install

Cross compile libid3tag: host# cd libid3tag-x.x.x

Configure libid3tag for cross compile, where prefix is your desired installation directory: host# ./configure --prefix=/home/user/target/opt/madplayer CC=arm_v5t_le-gcc --host=arm-linux

Make and install via: host# make then host# make install

Finally, host# cd madplayer-x.x.x

Configure like: CC=arm_v5t_le-gcc ./configure
--build=i686-linux --host=arm-linux
--prefix=/home/user/target/opt/madplayer
CFLAGS='-I/home/user/target/opt/madplayer/include'
LIBS='-L/home/user/target/opt/madplayer/lib'

Then host# make and host# make install

Boot your EVM via TFTP/NFS

From the target's serial prompt, target# LD_LIBRARY_PATH=/opt/madplay/lib:$LD_LIBRARY_PATH

Edit /etc/ld.so.conf, add the line /opt/madplayer/lib then run target# ldconfig

Play an MP3: target# /opt/madplay/bin/madplay myfile.mp3
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Audio/Video codecs - mplayer
mplayer is a multimedia player available from
[url=http://www.mplayerhq.hu/]http://www.mplayerhq.hu
. To see the (very long) list of supported codecs, see
http://www.mplayerhq.hu/DOCS/codecs-status.html
.
Obviously the audio codecs work better on ARM9s than video codecs. On
ARM9: MP3 seems to have a high load so madplay may be a better option;
AAC runs well though.

These instructions are for ARM9 using MV Tools, and may need
to be modified for other devices. See the README included with mplayer
for further instructions.

Download MPlayer from the above URL and unzip

Add Montavista tools to your path (e.g. host# export PATH=/opt/montavista/pro/devkit/arm/v5t_le/bin:$PATH)

First, host# cd MPlayer-x.x

Configure mplayer for cross compile, where prefix is your desired installation directory: host#
./configure --enable-cross-compile --cc=arm_v5t_le-gcc --host-cc=gcc
--target=arm-linux-gnu --prefix=/home/user/target/opt/MPlayer-1.0rc2/

Make and install via: host# make then host# make install

Boot your EVM via TFTP/NFS

Play an AAC: target# /opt/MPlayer-1.0rc2/bin/mplayer myfile.aac

See mplayer documentation to play other file types
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JPEG encoder/decoder - IJG
IJG's JPEG library supports JPEG encode and decode; file formats include PPM, PGM, BMP, Targa, and RLE.

Download the JPEG library from
[url=http://www.ijg.org/]http://www.ijg.org/

Untar the JPEG library on the target file system

Boot your EVM using TFTP boot/NFS file system

target# cd /opt/jpeg-xx

target# ./configure

target# make

target# make install

target# cjpeg myfile.bmp > myfile.jpg for encode

target# djpeg myfile.jpg > myfile.bmp for decode
               
               
               
               
               

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