* commit '59ab9e8b':
  examples/encode_video: allocate the packet dynamically
Merged-by: Clément Bœsch <cboesch@gopro.com>

* commit '5f102a95':
  examples/encode_video: switch to the new encoding API
Merged-by: Clément Bœsch <cboesch@gopro.com>

* commit 'fee0f1de':
  examples/decode_audio: flush the decoder
Merged-by: Clément Bœsch <cboesch@gopro.com>

* commit '9a38184a':
  examples/decode_audio: allocate the packet dynamically
Merged-by: Clément Bœsch <cboesch@gopro.com>

* commit '45a1ce2f':
  examples/decode_audio: handle planar audio now produced by the MP2 decoder

This commit is a noop, we use a simpler and more generic method to write
the samples.
Merged-by: Clément Bœsch <cboesch@gopro.com>

* commit '3d66717f':
  examples/decode_audio: use the new audio decoding API
Merged-by: Clément Bœsch <cboesch@gopro.com>

* commit '0946c754':
  examples/decode_audio: use a parser for splitting the input
Merged-by: Clément Bœsch <cboesch@gopro.com>

Not sure if it behaves ideally in presence of decoding errors.

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Fixes integer overflow
Fixes: 701640
Found-by: Found-by: Thomas Guilbert <tguilbert@google.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: James Almer <jamrial@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

* commit 'f27e262d':
  examples/encode_audio: switch to the new audio encoding API
Merged-by: Clément Bœsch <u@pkh.me>

* commit '44c9f374':
  examples/qsvdec: convert to the new decoding API
Merged-by: Clément Bœsch <u@pkh.me>

* commit '1dd2b6c9':
  examples/qsvdec: switch to the hwcontext API
Merged-by: Clément Bœsch <u@pkh.me>

* commit 'f92d7bdf':
  libopusdec: default to stereo for invalid number of channels

This commit is a noop, see 8c8f543bMerged-by: Clément Bœsch <u@pkh.me>

* commit 'b34c6cd5':
  dvbsub: cosmetics: Group all debug code together
Merged-by: Clément Bœsch <u@pkh.me>

* commit 'b8cd7a3c':
  dvbsub: Check for errors from system()

printf(...) replaced with fprintf(stderr, ...) for logging errors.
Merged-by: Clément Bœsch <u@pkh.me>

* commit '6427379f':
  als: Restructure DEBUG ifdefs to avoid unused function parameter warnings
  ac3enc: Restructure DEBUG ifdefs to avoid unused function parameter warnings
  ape: Restructure DEBUG ifdefs to avoid unused function parameter warnings

These 3 commits are not merged.

These commits were actually controversial in Libav. A good rationale can
be found here:
https://lists.libav.org/pipermail/libav-devel/2016-November/080698.htmMerged-by: Clément Bœsch <u@pkh.me>

* commit 'bdbb8c68':
  doc: Add libxavs section
Merged-by: Clément Bœsch <u@pkh.me>

Fixes tsan warnings in fate-apng:

WARNING: ThreadSanitizer: data race (pid=51230)
  Read of size 4 at 0x7d50000042fc by main thread (mutexes: write M1000):
    #0 frame_copy_props frame.c:302 (ffmpeg:x86_64+0x1019a35d6)
[..]
  Previous write of size 4 at 0x7d50000042fc by thread T1 (mutexes: write M997):
    #0 decode_idat_chunk pngdec.c:708 (ffmpeg:x86_64+0x100f5562a)

* commit '97cd7a3d':
  rtpdec_mpeg4: const correctness for parse_fmtp_config()

This commit is a noop, see ed491db3Merged-by: Clément Bœsch <u@pkh.me>

* commit '81a3c42a':
  Drop some bogus Doxygen documentation.

See 9365dfcbMerged-by: Clément Bœsch <u@pkh.me>

* commit 'a1d9de30':
  Fix some mismatches between function parameter and doxygen parameter names.
Merged-by: Clément Bœsch <u@pkh.me>

* commit '4d960a11':
  aarch64: vp9itxfm: Use w3 instead of x3 for the int eob parameter

This commit is a noop, see a95e7de4Merged-by: Clément Bœsch <u@pkh.me>

* commit 'e5b0fc17':
  arm: vp9itxfm: Simplify the stack alignment code

This commit is a noop, see a71cd843Merged-by: Clément Bœsch <u@pkh.me>

* commit '3c7fa8cb':
  hlsenc: Fix the openssl support

This commit is a noop, see edc43c57Merged-by: Clément Bœsch <u@pkh.me>

* commit '0b5a26e8': (35 commits)
  qdm2: Convert to the new bitstream reader
  qcelp: Convert to the new bitstream reader
  pcx: Convert to the new bitstream reader
  opus: Convert to the new bitstream reader
  nellymoser: Convert to the new bitstream reader
  jvdec: Convert to the new bitstream reader
  hqx: Convert to the new bitstream header
  hq_hqa: Convert to the new bitstream reader
  gsm: Convert to the new bitstream reader
  g72x: Convert to the new bitstream reader
  g2meet: Convert to the new bitstream reader
  fraps: Convert to the new bitstream reader
  flashsv: Convert to the new bitstream reader
  faxcompr: Convert to the new bitstream reader
  exr: Convert to the new bitstream reader
  escape130: Convert to the new bitstream reader
  escape124: Convert to the new bitstream reader
  dvdsubdec: Convert to the new bitstream reader
  dss_sp: Convert to the new bitstream reader
  cook: Convert to the new bitstream reader
  ...

This merge is a noop, see
http://ffmpeg.org/pipermail/ffmpeg-devel/2017-April/209609.htmlMerged-by: Clément Bœsch <u@pkh.me>

Fixes a reported (but false) race condition in tsan for fate-apng:

WARNING: ThreadSanitizer: data race (pid=6274)
  Read of size 4 at 0x7d680001ec78 by main thread (mutexes: write M1338):
    #0 update_thread_context src/libavcodec/pngdec.c:1456 (ffmpeg+0x000000dacf0c)
[..]
  Previous write of size 4 at 0x7d680001ec78 by thread T1 (mutexes: write M1335):
    #0 decode_idat_chunk src/libavcodec/pngdec.c:737 (ffmpeg+0x000000dae951)

Values from subsequent values are guaranteed to be identical (since
poc and nal_unit_type are checked to be the same between slices), so
this doesn't affect output in any way, but does resolve the remaining
reported race conditions (by tsan) in fate-hevc.

In practice, this fixes tsan warnings like this:

WARNING: ThreadSanitizer: data race (pid=25334)
  Read of size 4 at 0x7d9c0001adcc by main thread (mutexes: write M1386):
    #0 hevc_update_thread_context src/libavcodec/hevcdec.c:3310 (ffmpeg+0x000000b41c7c)
[..]
  Previous write of size 4 at 0x7d9c0001adcc by thread T1 (mutexes: write M1383):
    #0 hls_slice_header src/libavcodec/hevcdec.c:596 (ffmpeg+0x000000b43a22)

Otherwise the thread may still be in the middle of decoding a previous
frame, which would effectively trigger a race condition on any field
concurrently read and written.

In practice, this fixes tsan warnings like the following:

WARNING: ThreadSanitizer: data race (pid=17380)
  Write of size 4 at 0x7d64000160fc by main thread:
    #0 update_context_from_user src/libavcodec/pthread_frame.c:335 (ffmpeg+0x000000dca515)
[..]
  Previous read of size 4 at 0x7d64000160fc by thread T2 (mutexes: write M1821):
    #0 ff_thread_report_progress src/libavcodec/pthread_frame.c:565 (ffmpeg+0x000000dcb08a)