libfdk-aacdec: Enable Decoder Downmix including Downmix Metadata Support

The FDK decoder is capable of producing mono and stereo downmix from
multichannel streams. These streams may contain metadata that control
the downmix process. The decoder requires an Ancillary Buffer in order to
correctly apply downmix in streams containing downmix Metadata. The
decoder does not have an API interface to inform of the presence of
Metadata in the stream, and therefore the Ancillary Buffer is always
allocated whenever a downmix is requested.

When downmixing multichannel streams, the decoder requires the output
buffer in aacDecoder_DecodeFrame call to be of fixed size in order to
hold the actual number of channels contained in the stream. For example,
for a 5.1ch to stereo downmix, the decoder requires that the output buffer
is allocated for 6 channels, regardless of the fact that the output is in
fact two channels.

Due to this requirement, the output buffer is allocated for the maximum
output buffer size in case a downmix is requested (and also during
decoder init). When a downmix is requested, the buffer used for output
during init will also be used for the entire duration the decoder is open.
Otherwise, the initial decoder output buffer is freed and the decoder
decodes straight into the output AVFrame.

Signed-off-by: Martin Storsjö <martin@martin.st>
libfdk-aacdec: Enable Dynamic Range Control Metadata Support

For streams which contain DRC metadata, the FDK decoder is able to
control rendering of the decoded output. The rendering parameters
are detailed in fdk_aac_dec_options [].

The default behavior is left up to the decoder.

Signed-off-by: Martin Storsjö <martin@martin.st>
dump: display codec tags when available

For both audio and video.
Merge commit 'b01a2204b5cff7bb920f42fda1bb0103f450fe93'

* commit 'b01a2204b5cff7bb920f42fda1bb0103f450fe93':
  libfdk-aacdec: Enable Decoder Downmix including Downmix Metadata Support

Conflicts:
	libavcodec/libfdk-aacdec.c
	libavcodec/version.h

Merged-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/libfdk-aacdec: use av_feeep() to avoid leaving stale pointers in memory

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '66e9f839536238945fbfe9d2041b6891cb150e45'

* commit '66e9f839536238945fbfe9d2041b6891cb150e45':
  libfdk-aacdec: Enable Dynamic Range Control Metadata Support

Conflicts:
	libavcodec/version.h

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'bae557edcea996328e8ff48b9e074a4210f7e6b4'

* commit 'bae557edcea996328e8ff48b9e074a4210f7e6b4':
  dump: display codec tags when available

Conflicts:
	libavcodec/utils.c

See: d2d7b7134fc387837d51aa1d7f3dbe090d35e8b4
Merged-by: Michael Niedermayer <michaelni@gmx.at>
hlsenc.c, segment.c: propagate defaults to mpegts

This fixes the abnormally high ts overhead in the files produced by the
HLS and segments muxers. See https://trac.ffmpeg.org/ticket/2857 . For
example makes it much more likely that it can produces streams that fit
under the 64kb App store limit.

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