It makes no sense whatsoever to do this at each function call; we
already have a table for this.

Yields a 2x improvement in find_min_book (x86-64, Haswell+GCC):
ffmpeg -i sin.flac -acodec aac -y sin.aac
find_min_book
old
    605 decicycles in find_min_book, 8388453 runs,    155 skips.9x
    606 decicycles in find_min_book,16776912 runs,    304 skips.9x
    607 decicycles in find_min_book,33553819 runs,    613 skips.2x
    607 decicycles in find_min_book,67107668 runs,   1196 skips.3x
    607 decicycles in find_min_book,134215360 runs,   2368 skips3x

new
    359 decicycles in find_min_book, 8388552 runs,     56 skips.3x
    360 decicycles in find_min_book,16777112 runs,    104 skips.1x
    361 decicycles in find_min_book,33554218 runs,    214 skips.4x
    361 decicycles in find_min_book,67108381 runs,    483 skips.5x
    361 decicycles in find_min_book,134216725 runs,   1003 skips5x

and more importantly a non-negligible speedup (~ 8%) to overall AAC encoding:
old:
ffmpeg -i sin.flac -acodec aac -strict -2 -y sin_new.aac  6.82s user 0.03s system 104% cpu 6.565 total
new:
ffmpeg -i sin.flac -acodec aac -strict -2 -y sin_old.aac  6.24s user 0.03s system 104% cpu 5.993 total

This also improves accuracy of the expression by ~ 2 ulp in some cases.
Reviewed-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
Reviewed-by: Rostislav Pehlivanov <atomnuker@gmail.com>
Signed-off-by: Ganesh Ajjanagadde <gajjanag@gmail.com>

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

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

Fixes ticket #5271.

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

This fixes a data race warning by ThreadSanitizer.
FrameThreadContext.die is read by all the worker threads but is not
protected by any mutex. Move it to PerThreadContext so that each worker
thread reads its own copy of |die|, which can then be protected with
PerThreadContext.mutex.
Signed-off-by: Wan-Teh Chang <wtc@google.com>
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

This was a regression introduced by commit e7345abe which
enabled full use of the allocated packet but due to the overhead of
using field coding the buffer was too small and triggered warnings and
crashes.
Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>

The fact that now all quantization indices costs are cached justifies
storing 20 more integers in a structure already allocated on heap.
Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>

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

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

Add some more verbose info regarding why the imprecise and slow floor(x+0.5) hack
is used; helpful for future maintenance.
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Ganesh Ajjanagadde <gajjanag@gmail.com>

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

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

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

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

* commit 'cae448cf':
  aviobuf: add a private data struct for avio_open()ed contexts
Merged-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

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

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

* commit '832a202c':
  protocols: make the list of protocols static
Merged-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

It is current disabled.
Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

* commit '7d61dc95':
  lavf: move urlcontext_child_class_next() to protocols.c
Merged-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

* commit '0fa00d05':
  lavf: move avio_enum_protocols() to protocols.c
Merged-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

This commit also disables the async fate test, because it
used internal APIs in a non-kosher way, which no longer
exists.

* commit '2758cded':
  lavf: reorganize URLProtocols
Merged-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

* commit '225e84e7':
  hls: disallow opening nested files in child demuxers
Merged-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

* commit 'e192cd9c':
  smoothstreamingenc: do not open the files as read+write
Merged-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

* commit 'd082078a':
  dashenc: eliminate ffurl_* usage
Merged-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

* commit '7fbb3b5b':
  lavf: use the io_open callbacks for files opened from open_input() as well
Merged-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

This commit is no-op. The affected piece of code does not
exist in FFmpeg.

* commit '5efd9128':
  avprobe: do not call avio_close() on a custom context
Merged-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

FATE tests have been updated to patch. They do not differ in
any meaningful way.

* commit 'dc6527ed':
  nutenc: do not use AVCodecContext.frame_size
Merged-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

Improves jpeg auto-detection.

This option is typically useful when cross-compiling dynamic libraries
for iOS, with something such as --install-name-dir=@rpath

optimize draw_bar_yuv (slightly faster)
optimize draw_axis (about 2x faster)
Signed-off-by: Muhammad Faiz <mfcc64@gmail.com>

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

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

Fixes regression with ticket2451
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>