* qatar/master:
  xtea: Add Doxy @file and group

See: 50f52a54Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'f7349568':
  adler32: Fix doxy group definition

See: 624672fc and others
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'e10fd08a':
  h264: Refactor decode_nal_units

Conflicts:
	libavcodec/h264.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'c389a804':
  libxvid: Add SSIM displaying through a libxvidcore plugin

Conflicts:
	libavcodec/libxvid.c
	libavcodec/version.h

See: 3b3c1ed0Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '5ce7ca68':
  libxvid: add working lumimasking and variance AQ

Conflicts:
	libavcodec/libxvid.c
	libavcodec/version.h

See: ccb212b6Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'd3789eee':
  aarch64: implement videodsp.prefetch
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '8675bcb0':
  aarch64: add armv8 CPU flag
Merged-by: Michael Niedermayer <michaelni@gmx.at>

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

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

Based on a patch by James Almer <jamrial@gmail.com>.
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

* cehoyos/master:
  Set Matroska private data when muxing Prores.
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* qatar/master:
  fate: add tests for SANM and VIMA

Conflicts:
	tests/fate/video.mak
	tests/ref/fate/sanm

See: 4cdff582Merged-by: Michael Niedermayer <michaelni@gmx.at>

The specification requires the mov code point to be written as "fourcc".

* commit 'eeadcdfd':
  LucasArts SMUSH demuxer

Conflicts:
	Changelog
	doc/general.texi
	libavformat/smush.c
	libavformat/version.h

See: bef8fd70Merged-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

The old implementation is unusable due to changes in the Xvid API.
Further fixes by Michael Niedermayer <michaelni@gmx.at>.
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

* commit '6f273093':
  LucasArts SMUSH VIMA audio decoder

Conflicts:
	Changelog
	libavcodec/avcodec.h
	libavcodec/codec_desc.c
	libavcodec/version.h
	libavcodec/vima.c

This commit adds a AV_CODEC_ID_ADPCM_VIMA alias in addition to the previously
used AV_CODEC_ID_VIMA, as well as a AVCodec with name "adpcm_vima" in addition
to the previously used name "vima"
These changes are needed for compatibility with the renamed codec in libav

See: b1835732 and others
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'a420ccd4':
  LucasArts SMUSH SANM video decoder

Conflicts:
	Changelog
	doc/general.texi
	libavcodec/Makefile
	libavcodec/allcodecs.c
	libavcodec/avcodec.h
	libavcodec/sanm.c
	libavcodec/version.h

See: 69254f46 and others
Merged-by: Michael Niedermayer <michaelni@gmx.at>

Fixes CID 732244.
Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>

8% faster h264 decoding on Apple A7.

Fixes CID 1197068.
Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>

movq from SSE register to memory is an SSE2 instruction.
Instead, use SSE movlps, which does the same thing.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

Fixes CID1197062
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes CID1197061
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This allows clients to seek between first played segment
and the last one in the live stream playlist with #EXT-X-PLAYLIST-TYPE:EVENT attribute.

Since we are basically seeking the AVIOContext under the subdemuxer, we
need to flush the subdemuxer to avoid old packets from being read from
the packet queue after the seek.
Signed-off-by: Anssi Hannula <anssi.hannula@iki.fi>

Properly take stream_index into account so that a keyframe will be
looked for in the specified stream_index only.

Similarly, only check timestamp validity against the specified
stream_index.

Also remove code for stream_index == -1 case which does not actually
happen as it is handled by generic code.

This is based on an initial patch by James Deng.
Signed-off-by: Anssi Hannula <anssi.hannula@iki.fi>

Do not try to delay opening newly required playlists until a segment
switch. Applications expect that newly selected undiscarded streams are
available immediately, especially with alternative rendition streams
(selectable audio/subtitle tracks).

One might think that delaying variant stream switch until a segment
switch would allow a "seamless" switch without us having to download a
specific segment from two different variant playlists. However, that is
not the case, since the application would have to keep the previous
stream available (undiscarded) until the first packet of the newly
selected stream arrives, but by that time the demuxer would have already
downloaded the next segment of both variants.
Signed-off-by: Anssi Hannula <anssi.hannula@iki.fi>

Signed-off-by: Anssi Hannula <anssi.hannula@iki.fi>

As per spec 3.4.3 ("A client MUST NOT assume that segments with the same
sequence number in different Media Playlists contain matching content.")
we cannot use sequence numbers for packet ordering.

This can be seen e.g. in the subtitle streams of
bipbop_16x9_variant.m3u8 that have considerably longer segments and
therefore different numbering.

Since the code now exclusively syncs using timestamps that may wrap, add
some additional checking for that.

According to the HLS spec all the timestamps should be in 33-bit MPEG
format and synced together.

v2: cleaner wrap detection
v3: further wrap detection improvements
Signed-off-by: Anssi Hannula <anssi.hannula@iki.fi>

While selecting a packet to return to caller in read_packet(), the code
corrects the timestamps for starting timestamps.

However, this is wrong, since for live streams the initial timestamps
might differ just because of the time delay between the retrieval of the
various Media Playlists.

Fortunately, spec 6.2.4 mandates that all variant streams must have
matching timestamps, so we do not need to correct for initial
timestamps.

Drop the correction code.

Note that ID3 timestamps were previously ignored, so this code was
previously actually needed.
Signed-off-by: Anssi Hannula <anssi.hannula@iki.fi>

Check if the playlist is still needed just before requesting the next
segment instead of after exhausting the previous segment.
Signed-off-by: Anssi Hannula <anssi.hannula@iki.fi>

Improve selection of the segment sequence number when restarting the
reception of a playlist after it was suspended due to being unneeded
(due to discard flags).

The current code assumes that each playlist contains matching data with
the same sequence number, while spec 3.4.3 specifically says that that
is not the case. Often subtitle playlists also have longer target
durations as well, causing the selection to be completely wrong.

Instead prefer using the playlist segment duration information for
non-live playlists, and other means if that is not possible.
Signed-off-by: Anssi Hannula <anssi.hannula@iki.fi>

Seeking needs to be tracked on a per-playlist basis, since the resyncing
code in hls_read_packet() has to sync each playlist to the seek
timestamp instead of stopping after the first playlist has reached it.
Signed-off-by: Anssi Hannula <anssi.hannula@iki.fi>

HLS provides MPEG TS timestamps via ID3 tags in the beginning of each
segment of elementary audio streams.

v2: fix issues with streams that have multiple ID3 tags
Signed-off-by: Anssi Hannula <anssi.hannula@iki.fi>

Useful for ID3 parsing.
Signed-off-by: Anssi Hannula <anssi.hannula@iki.fi>