avcodec/dcadec: remove fishy FFMAX()

These where intended to maintain the previous behavior before dca_dmix_code()
but it is unclear (to me) which way is correct and no sample seem to trigger
the case, also they are incomplete for the purprose of error checking

Found-by: Niels Möller <nisse@lysator.liu.se>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/dcadec: Check dca_dmixtable index

Found-by: Niels Möller <nisse@lysator.liu.se>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
huffyuvdec: clean up macro

It's no longer used inside another specific macro, so rename it.
Also remove duplicated definition and realign code.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
huffyuvdec: trick for plane decoding, 8bits

10496 -> 9105 cycles.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
huffyuvdec: remove superfluous check

An invalid entry already has the property of having a negative number
of bits, so remove the check on the reserved value, and rearrange the
code as a consequence.

346800 decicycles in 422, 262079 runs, 65 skips
168197 decicycles in gray, 262077 runs, 67 skips
Overall time: 7.878s

319076 decicycles in 422, 262096 runs, 48 skips
159875 decicycles in gray, 262057 runs, 87 skips
Overall time: 7.394s

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
huffyuvdec: remove superfluous check in BGR code

Before: 154861 decicycles
After:  152912 decicycles

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avutil/ppc/intreadwrite: try to fix intreadwrite for ppc64le

Untested due to lack of hardware

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Support raw dvdsub palette as stored on normal dvd's

This is how the palette is stored on dvd's. Currently
only xbmc passes the palette information to libavcodec
this way.
Check return value of avio_seek and avoid modifying state if it fails

The code still modifies state if the timestamp is not found. Not
sure exactly how to avoid that.
asf hacks
if av_read_packet returns AVERROR_IO, we are done. ffmpeg's codecs might or might not handle returning any completed demuxed packets correctly
added: Ticket #7187, TV Teletext support for DVB EBU Teletext streams
Don't accept mpegts PMT that isn't current
Don't reparse PMT unless it's version has changed
Read PID timestamps as well as PCR timestamps to find location in mpegts stream
Get stream durations using read_timestamp
changed: allow 4 second skew between streams in mov before attempting to seek
fixed: memleak in mpegts demuxer on some malformed (??) mpegts files with too large pes packets

at-visions sample file brokenStream.mpg
Speed up mpegts av_find_stream_info
dxva-h264 Fix dxva playback of streams that don't start with an I-Frame.