-add support/test on big-endian machine ?

-test AC3 - tested with TomorrowNeverDies-2.1-48khz-192kbit.ac3, Canyon-5.1-48khz-448kbit.ac3,
               Broadway-5.1-48khz-448kbit.ac3 and FFmpeg AC3 encoder
-test DTS - tested with (only RAW_BE version) 5.1 24bit.dts, ES 6.1 - 5.1 16bit.dts and FFmpeg DCA encoder
-test MPEG

-add support for mpeg2 with extension
-info about normal/karaoke mode in mpeg
-info about dynamic range control in mpeg

-add support for wma
-add support for mpeg4 aac
-add support for eac3

-sending data stream direct to spdif

-control latency
-frequency sampling

usage:
./ffmpeg -y -i test_48khz.dts -acodec copy -f spdif test.spdif && ./ffmpeg -ar 48000 -f s16le -ac 2 -i test.spdif -f alsa plughw:0
