dct/rdft: Remove duplicate typedefs for context structs

The typedefs also exist in the avfft.h header and since typedefs cannot be
legally redefined in C, the code fails to compile with some compilers.

This reverts commits 11c7155cce and 57f1b1dcc7.
qpeldsp: Mark source pointer in qpel_mc_func function pointer const
vc1dsp: Add wrappers for {avg|put}_vc1_mspel_mc00_c

This avoids invoking the wrapped functions with too many arguments.
Merge commit '060e4a9e0627adcda9101dd68ec7f22b4ce22b5b'

* commit '060e4a9e0627adcda9101dd68ec7f22b4ce22b5b':
  dct/rdft: Remove duplicate typedefs for context structs

See: 005e81d6cff4071847fe6e6b6de3b5d709c76de9
See: 77304cf3523cbeec56a29749fea5c21e610be644
Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '7fb993d338d88f2f62e0a358b6c9f3eb9a3a08ac'

* commit '7fb993d338d88f2f62e0a358b6c9f3eb9a3a08ac':
  qpeldsp: Mark source pointer in qpel_mc_func function pointer const

Conflicts:
	libavcodec/h264qpel_template.c
	libavcodec/x86/cavsdsp.c
	libavcodec/x86/rv40dsp_init.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '58e65e44f435243dc72dfce1f8af8afcf1319f34'

* commit '58e65e44f435243dc72dfce1f8af8afcf1319f34':
  vc1dsp: Add wrappers for {avg|put}_vc1_mspel_mc00_c

Conflicts:
	libavcodec/vc1dsp.c

See: 319235c67c59d6abaa78d5af57121ab9816f937d
Merged-by: Michael Niedermayer <michaelni@gmx.at>
RELEASE_NOTES: fix WebVTT decoder typo (-> encoder)

Found-by: Clément Bœsch <u@pkh.me>
Signed-off-by: Timothy Gu <timothygu99@gmail.com>
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.