Fixes ticket 6398.

Debugged with the help of James Almer and Hendrik Leppkes.

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

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

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

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

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

Fixes #6605.
Signed-off-by: Paul B Mahol <onemda@gmail.com>

This code is disabled since 2012. V4L1 was dropped from the kernel more
than 10 years ago.

Fixes: runtime error: shift exponent 64 is too large for 64-bit type 'residual' (aka 'unsigned long')
Fixes: 2838/clusterfuzz-testcase-minimized-6260066086813696

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpegSigned-off-by: Michael Niedermayer <michael@niedermayer.cc>

Fixes: runtime error: signed integer overflow: 1073901567 + 1073901567 cannot be represented in type 'int'
Fixes: 3124/clusterfuzz-testcase-minimized-454643435752652

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpegSigned-off-by: Michael Niedermayer <michael@niedermayer.cc>

Fixes: runtime error: signed integer overflow: 1168175789 + 1168178473 cannot be represented in type 'int'
Fixes: 3081/clusterfuzz-testcase-minimized-4807564879462400
Fixes: 2844/clusterfuzz-testcase-minimized-5561715838156800

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpegSigned-off-by: Michael Niedermayer <michael@niedermayer.cc>

sndio is already autodetected, this commit makes sure
--disable-autodetect actually disable it unless --enable-sndio is
specified.

jack is already autodetected, this commit makes sure
--disable-autodetect actually disable it unless --enable-jack is
specified.

alsa libs are already autodetected, this commit makes sure
--disable-autodetect actually disable it unless --enable-alsa is
specified.

vda_framework is already pulled by the weakly enabled vda and
videotoolbox.

There is no need for duplication.

This simplifies incoming SDL related changes by removing potential
mismatching states of sdl and sdl2 variables. Since a component can have
all kind of states (such as unset, enabled, disabled or requested),
keeping these variables in sync manually in random places is not robust.

Interlaced encoding profits from it, or might even need it in some
players.
No harm in enabling it unconditionally.
Signed-off-by: Timo Rothenpieler <timo@rothenpieler.org>

Their use in the public header is deprecated and will be removed, but
they are still needed by some codecs at least as long as qscale related
deprecated fields in the AVFrame struct remain in the tree.

It's already defined and actually enabled depending on compiler options
elsewhere.
Signed-off-by: James Almer <jamrial@gmail.com>

Main use-case is proxying avio through a foreign I/O layer and a custom
AVIO context, without losing latency and performance characteristics.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

Merged from Libav commit 173b5621.

It must be freed using avio_context_free() starting with commit
b12e4d3b.
Found-by: Ronald S. Bultje <rsbultje@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>

Signed-off-by: Steven Liu <lq@chinaffmpeg.org>

Signed-off-by: Timo Rothenpieler <timo@rothenpieler.org>

Signed-off-by: Timo Rothenpieler <timo@rothenpieler.org>

(cherry picked from commit 6f554521)
Signed-off-by: James Almer <jamrial@gmail.com>

Before this commit, AVIOContext is to be freed with a plain av_free(),
which prevents us from adding any deeper structure to it.

(cherry picked from commit 99684f3a)
Signed-off-by: James Almer <jamrial@gmail.com>

move from dashenc, move DASHTmplId and dash_fill_tmpl_params to
dash.c, they will be used by dash demuxer and dash muxer.

v2 fixed:
1. rename common file from dashcomm.* to dash.*
Suggested-by: Hendrik Leppkes <h.leppkes@gmail.com>

v3 fixed:
1. rename header file pre defined
2. add ff_ prefix for the internal API
Suggested-by: James Almer <jamrial@gmail.com>
Suggested-by: Timo Rothenpieler <timo@rothenpieler.org>
Reviewed-by: wm4 <nfxjfg@googlemail.com>
Signed-off-by: Steven Liu <lq@onvideo.cn>

Fixes: 20170829B.mxf

Co-Author: 张洪亮(望初)" <wangchu.zhl@alibaba-inc.com>
Found-by: Xiaohei and Wangchu from Alibaba Security Team
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>