Should make the default behaviour safer for careless callers that open
random untrusted files.

Bug-Id: CVE-2016-1897
Bug-Id: CVE-2016-1898

Some (de)muxers open additional files beyond the main IO context.
Currently, they call avio_open() directly, which prevents the caller
from using custom IO for such streams.

This commit adds callbacks to AVFormatContext that default to
avio_open2()/avio_close(), but can be overridden by the caller. All
muxers and demuxers using AVIO are switched to using those callbacks
instead of calling avio_open()/avio_close() directly.

(de)muxers that use the URLProtocol layer directly instead of AVIO
remain unconverted for now. This should be fixed in later commits.

Unbreak build from 7a5902c556.

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

Don't prefix them ffio_url, which is misleading, sounding too
much like the urlprotocol layer (like ffurl_*).

Signed-off-by: Martin Storsjö <martin@martin.st>

This is not an API change; the fields were explicitly declared private
before.

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

When given a stream starting at dts=0, it would previously consider
s->offset as uninitialized and set an offset when the second packet
was written, ending up writing two packets with dts=0. By initializing
this field to AV_NOPTS_VALUE, we make sure that we only initialize it
once, on the first packet.

Signed-off-by: Martin Storsjö <martin@martin.st>

Those streams should never get any packets by definition.

This will allow us to automatically generate manpages for them.

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

And fix the error introduced when adding private option to avio.
See 32caa7b13c

Deprecate AVFormatContext.mux_rate.

This will allow the caller to enumerate child contexts in a generic way
and since the API is recursive, it also allows for deeper nesting (e.g.
AVFormatContext->AVIOContext->URLContext)

This will also allow the new setting/reading API to transparently apply
to children contexts.

It allows to search for options only with AVClass, without allocating
the corresponding context.

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

Signed-off-by: Zohar Kelrich <lumimies@gmail.com>
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

Add support for demuxer private options.

This fixes the warning:
libavformat/options.c:62:1: warning: missing braces around initializer [-Wmissing-braces]

Instead of -fflags rtphint, set -movflags rtphint instead.

Signed-off-by: Martin Storsjö <martin@martin.st>

AVClass is already initialized in  avformat_get_context_defaults.

This breaks API and ABI.

Signed-off-by: Mans Rullgard <mans@mansr.com>

av_alloc_format_context() public function

Originally committed as revision 25483 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25210 to svn://svn.ffmpeg.org/ffmpeg/trunk

This can currently also be set via -muxdelay in ffmpeg for muxers,
but not for demuxers (nor for demuxers in ffplay) - this patch
allows it to be set in all those cases.

Originally committed as revision 25180 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 24825 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 24818 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 23758 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 23161 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 22987 to svn://svn.ffmpeg.org/ffmpeg/trunk

Passing an explicit filename to this command is only necessary if the
documentation in the @file block refers to a file different from the
one the block resides in.

Originally committed as revision 22921 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 22745 to svn://svn.ffmpeg.org/ffmpeg/trunk

This works around common issues with mpeg-ps files with broken timestamps.
Also allows playing the broken sample from issue1024.

Originally committed as revision 21562 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 20483 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 19274 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 17690 to svn://svn.ffmpeg.org/ffmpeg/trunk

avformat_alloc_context(), and drop the old symbol at the next major
bump.

Originally committed as revision 17047 to svn://svn.ffmpeg.org/ffmpeg/trunk

Otherwise doxygen complains about ambiguous filenames when files exist
under the same name in different subdirectories.

Originally committed as revision 16912 to svn://svn.ffmpeg.org/ffmpeg/trunk

reduce the utils.c clutter.

Originally committed as revision 16516 to svn://svn.ffmpeg.org/ffmpeg/trunk