resample: remove an unneeded context variable
replaygain: allow exporting already decoded replaygain values

This adds a function to export raw replaygain values (i.e. in the (u)int32_t
form). It first checks whether AV_PKT_DATA_REPLAYGAIN side data is present, in
which case it does nothing.

Signed-off-by: Anton Khirnov <anton@khirnov.net>
mp3dec: move XING/Info and VBRI parsing into their own functions

Signed-off-by: Anton Khirnov <anton@khirnov.net>
crc: add ANSI CRC16 LE

This adds the reversed byte-order version of the ANSI CRC16.

Signed-off-by: Anton Khirnov <anton@khirnov.net>
mp3dec: decode more data from Info header

Signed-off-by: Anton Khirnov <anton@khirnov.net>
Merge commit '21d8f4da91673051ad7055cf63d989488a56368e'

* commit '21d8f4da91673051ad7055cf63d989488a56368e':
  resample: remove an unneeded context variable

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'ae43c10e36197000de2f3cc99ea35727ce98a796'

* commit 'ae43c10e36197000de2f3cc99ea35727ce98a796':
  replaygain: allow exporting already decoded replaygain values

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'fbd8e042107ec63e0ddf155588c59dcb76007641'

* commit 'fbd8e042107ec63e0ddf155588c59dcb76007641':
  mp3dec: move XING/Info and VBRI parsing into their own functions

Conflicts:
	libavformat/mp3dec.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '0983d48111f578e17e8c1967d25ce593fce62b63'

* commit '0983d48111f578e17e8c1967d25ce593fce62b63':
  crc: add ANSI CRC16 LE

Conflicts:
	doc/APIchanges
	libavutil/crc.c
	libavutil/crc.h
	libavutil/version.h
	tests/ref/fate/crc

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '32d05934abc7427bb90380a4c1ab20a15fd7d821'

* commit '32d05934abc7427bb90380a4c1ab20a15fd7d821':
  mp3dec: decode more data from Info header

Conflicts:
	libavformat/mp3dec.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
ffmpeg: fix mixed merged & split side data with the stream->packet hack

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>