These use the mmx IDCT, but sse2 put/add_pixels_clamped implementations.
This way we don't need to use the ff_put/add_pixels_clamped function
pointers.

This makes using the function pointer ff_add_pixels_clamped() unnecessary,
since we always know what the best implementation is at compile-time.

Since there's separate SSE2 implementations of xvid_idct_put/add, this
patch has no practical impact on performance.

Instead, hardcode the use of the _arm implementation of add_pixels,
and use the C version for put_pixels (as no arm-optimized version
exists). Since there's separate implementations of idct{,_put,_add}
for neon, this has no practical impact on performance.

This tries to handle cases where separate invocations of decode_frame()
(each running in separate threads) write to respective fields in the
same AVFrame->data[]. Having per-field owners makes interaction between
readers (the referencing thread) and writers (the decoding thread)
slightly more optimal if both accesses are field-based, since they will
use the respective producer's thread objects (mutex/cond) instead of
sharing the thread objects of the first field's producer.

In practice, this fixes the following tsan-warning in fate-h264:

WARNING: ThreadSanitizer: data race (pid=21615)
  Read of size 4 at 0x7d640000d9fc by thread T2 (mutexes: write M1006):
    #0 ff_thread_report_progress pthread_frame.c:569 (ffmpeg:x86_64+0x100f7cf54)
[..]
  Previous write of size 4 at 0x7d640000d9fc by main thread (mutexes: write M1004):
    #0 update_context_from_user pthread_frame.c:335 (ffmpeg:x86_64+0x100f81abb)

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

This fixes a proble where ffmpeg would cause crash to do a seek when the network disconnect.
The log like this:
01-01 10:53:03.441  6580  6580 F DEBUG   : backtrace:
01-01 10:53:03.441  6580  6580 F DEBUG   :     #00 pc 0002942e  /system/lib/libavformat.so (ffurl_write+9)
Signed-off-by: tiejun.peng <tiejun.peng@foxmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

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

Fixes: CID1404842
Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>

Fixes the following tsan warning when running fate-vsynth_lena-ffvhuff:

WARNING: ThreadSanitizer: data race (pid=6484)
  Write of size 8 at 0x7d64000154b8 by main thread (mutexes: write M1331):
    #0 update_context_from_user src/libavcodec/pthread_frame.c:331 (ffmpeg+0x000000dca887)
[..]
  Previous read of size 8 at 0x7d64000154b8 by thread T2 (mutexes: write M1334):
    #0 draw_slice src/libavcodec/huffyuvdec.c:857 (ffmpeg+0x000000bcc86f)

Signed-off-by: Kyle Swanson <k@ylo.ph>

This adds partial support for the RFC 4175 (raw video over RTP). The
only supported formats are the YCbCr-4:2:2 8 bit because it's natively
supported by FFmpeg with pixel format UYVY, and 10 bit which requires
the vrawdepay codec to convert the payload in a format handled by
FFmpeg.
Signed-off-by: Damien Riegel <damien.riegel@savoirfairelinux.com>
Reviewed-by: Rostislav Pehlivanov <atomnuker@gmail.com>

Add a codec capable of decoding some formats of the RFC4175. For now
it's only capable of handling YCbCr-4:2:2 with 8-bit or 10-bit depth.

For 8-bit it's a simple pass-through, for 10-bit it depacks the stream
in the AV_PIX_FMT_YUV422P10 pixel format.
Signed-off-by: Damien Riegel <damien.riegel@savoirfairelinux.com>
Reviewed-by: Rostislav Pehlivanov <atomnuker@gmail.com>

* commit 'bf2f748f':
  configure: Use correct libm linker flag during math function checks
Merged-by: James Almer <jamrial@gmail.com>

* commit 'ce6f780b':
  configure: Add missing asyncts filter, movie filter, and output example deps
Merged-by: James Almer <jamrial@gmail.com>

* commit '04698d52':
  configure: Use correct variable name in libsnappy test
Merged-by: James Almer <jamrial@gmail.com>

* commit '30f0d1b9':
  configure: Remove old avisynth support leftover
Merged-by: James Almer <jamrial@gmail.com>

* commit '6a1ea4ec':
  arm: warn/error on movrelx usage problematic with PIC on ELF
Merged-by: James Almer <jamrial@gmail.com>

* commit '5bcc6f76':
  configure: Disable warning C4703 with MSVC
Merged-by: James Almer <jamrial@gmail.com>

* commit 'bd9cd046':
  w32pthreads: Fix function pointer casts
Merged-by: James Almer <jamrial@gmail.com>

* commit '233d50b2':
  qt-faststart: Do not try to use fancy 64-bit seeking functions on mingw32ce
Merged-by: James Almer <jamrial@gmail.com>

* commit '537b5b77':
  rtmpdh: Do global initialization before running the test
Merged-by: James Almer <jamrial@gmail.com>

* commit '2f99117f':
  aarch64: vp9itxfm: Don't repeatedly set x9 when nothing overwrites it

This commit is a noop, see 37cb224eMerged-by: James Almer <jamrial@gmail.com>

* commit '2dbe2aa2':
  rdt: Convert to the new bitstream reader
  ogg: Convert to the new bitstream reader
  mpegts: Convert to the new bitstream reader
  xsubdec: Convert to the new bitstream reader
  xan: Convert to the new bitstream reader
  wnv1: Convert to the new bitstream reader
  vima: Convert to the new bitstream reader
  vble: Convert to the new bitstream reader
  utvideodec: Convert to the new bitstream reader
  twinvq: Convert to the new bitstream reader
  tscc2: Convert to the new bitstream reader
  truespeech: Convert to the new bitstream reader
  tiertex: Convert to the new bitstream reader
  truemotion2: Convert to the new bitstream reader
  svq1dec: Convert to the new bitstream reader
  smacker: Convert to the new bitstream reader
  sipr: Convert to the new bitstream reader
  rtjpeg: Convert to the new bitstream reader
  ra288: Convert to the new bitstream reader
  ra144: Convert to the new bitstream reader

This merge is a noop, see
http://ffmpeg.org/pipermail/ffmpeg-devel/2017-April/209609.htmlMerged-by: James Almer <jamrial@gmail.com>

* commit '79566ec8':
  arm: vp9itxfm: Rename a macro parameter to fit better

This commit is a noop, see f69dd26dMerged-by: James Almer <jamrial@gmail.com>

* commit '721bc375':
  arm/aarch64: vp9itxfm: Fix indentation of macro arguments

This commit is a noop.
Merged-by: James Almer <jamrial@gmail.com>

* commit '06fec74c':
  checkasm: vp9dsp: benchmark all sub-IDCTs (but not WHT or ADST).

This commit is a noop, see 1c8fbd7bMerged-by: James Almer <jamrial@gmail.com>

* commit 'effc1430':
  Revert "checkasm: vp9dsp: Benchmark the dc-only version of idct_idct separately"
Merged-by: James Almer <jamrial@gmail.com>

* commit '12ab667e':
  matroska: use av_stream_add_side_data() for stereo3d side data
  mov: Use av_stream_add_side_data() for displaymatrix side data
  utils: Add av_stream_add_side_data()

This is a noop, see
2ab50647
77f033eb
2343f23eMerged-by: James Almer <jamrial@gmail.com>

* commit '286ab878':
  fate.sh: Allow setting other make flags for running tests
Merged-by: James Almer <jamrial@gmail.com>

* commit 'aa498c31':
  avpacket: fix leak on realloc in av_packet_add_side_data()

This commit is a noop, see 574929d8Merged-by: James Almer <jamrial@gmail.com>

* commit 'c7ab0eb3':
  examples/decode_video: allocate the packet dynamically
Merged-by: James Almer <jamrial@gmail.com>

* commit '728ea23c':
  examples/decode_video: switch to the new decoding API
Merged-by: James Almer <jamrial@gmail.com>

* commit 'f78d360b':
  examples/decode_video: use a parser for splitting the input
Merged-by: James Almer <jamrial@gmail.com>

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