Avoid busy loops and decrease CPU usage.

Suggested-By: Roger Pack

It will be used in event_thread() in a pending patch.

SDL_Init() is called on the event handler thread, as required by SDL in
Windows to avoid deadlocks as discovered by Roger Pack.

Fix trac ticket #1743 and #1744.

cherry picked from commit 211c39ade87bc079eabc862a6b684544dc88a786
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

* qatar/master:
  lavc: remove mp3_header_(de)compress bitstream filters

Conflicts:
	Changelog
	libavcodec/mp3_header_compress_bsf.c
	libavcodec/mp3_header_decompress_bsf.c

The decompress filter is left in place for interoperability and support of
files that used the compress filter.
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '1eaac1d6':
  mpeg12dec: Extract CC user data into frame side data

Conflicts:
	doc/APIchanges
	libavutil/version.h
Merged-by: Michael Niedermayer <michaelni@gmx.at>

they should be supported now

This reverts commit 1ee1a3d9.

* commit 'a16577d9':
  MSN Audio support

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

* commit '56d061ce':
  metasound: add last missing modes (8kHz @ 6kbps per channel)

Conflicts:
	Changelog
	doc/general.texi
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'de44dfc7':
  vc1: Reset numref if fieldmode is not set

This change is redundant, numref is already reset
Merged-by: Michael Niedermayer <michaelni@gmx.at>

Simplify.

The macro value can be shared between configure script and cmdutils.c.

They mangle the mp3 header in a non-standard way to save a few bytes.
People who care about space so much should just use a more efficient
codec.

Signed-off-by: Anton Khirnov <anton@khirnov.net>

This is essentially a MS GSM decoder extension that supports more
sampling rates and lower bitrates.
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Signed-off-by: Anton Khirnov <anton@khirnov.net>

* qatar/master:
  aacsbr: Add some const casts to silence warnings in ff_sbr_apply()

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

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

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

* commit 'ab81f24a':
  build: Integrate multilibrary examples into the build system

Conflicts:
	configure
	doc/Makefile
	doc/examples/muxing.c
	doc/examples/output.c
	libavformat/Makefile
	libavformat/output-example.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '14abeaa4':
  build: Separate building programs linking against libav* from building av*

Conflicts:
	Makefile
	doc/Makefile
Merged-by: Michael Niedermayer <michaelni@gmx.at>

There are samples in the wild with B-frames and P-frames with different
interlace mode.

CC: libav-stable@libav.org
Reported-by: Jean-Baptiste Kempf <jb@videolan.org>
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

Fixes out of array read
Fixes assertion failure
Fixes asan_static-oob_16431c0_8036_rio_bravo_mono_64_spx.ac3

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This includes moving libavformat/output-example to doc/examples/output.

This will allow cleaner integration of building example programs.

Fixes out of array accesses
Fixes asan_static-oob_eb9812_5961_iv41.avi
This reverts the merge of c9ef6b09

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind

Signed-off-by: Marton Balint <cus@passwd.hu>
Signed-off-by: Stefano Sabatini <stefasab@gmail.com>

This option allows to add a prefix to the segment list entry filenames.

Also set by default the list entry filenames to the corresponding
segment basename, consistent with the HLS muxer.

Based on an idea by Steven Liu <lingjiujianke@gmail.com>.

Opus Pre Skip is exported in AVCodecContext->delay similar to how
it is done for matroska. Doing the same for ogg too.
Signed-off-by: Vignesh Venkatasubramanian <vigneshv@google.com>
Reviewed-by: Nicolas George <george@nsup.org>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

* qatar/master:
  doc: Add the host executable suffix for the print_options dependency

See: d48f014fMerged-by: Michael Niedermayer <michaelni@gmx.at>

This fixes building on windows.
Signed-off-by: Martin Storsjö <martin@martin.st>

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

This partially reverts commit c0237d19
Some scripts make use of --disable-doc
Signed-off-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

avcodec_register_all() is implicitly called by av_register_all().

* qatar/master:
  build: Import makedef script from c99-to-c89
Merged-by: Michael Niedermayer <michaelni@gmx.at>