The XCB screen grabber is a drop-in replacement and not under GPL.

Drop the packet embedded in the context.

The input packet is already unref'd by the calling function.

Split version files into one line per symbol/directive to allow compatibility
with the Solaris linker without preprocessing and eliminate $ from version file
templates to simplify the postprocessing shell command.

Some code blocks use multiple bits of deprecated API.

This avoids unused variable warnings after the next version bump.
Also drop a trace level av_log() call that is in the way.

Signed-off-by: Diego Biurrun <diego@biurrun.de>

This avoids spurious library rebuilds when only the test program
code is changed and simplifies the build system.

Restore alphabetical order in lists, break overly long lines, do some
prettyprinting, add some explanatory section comments, group parts
together that belong together logically.

Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.

In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.

There are multiple important problems with this approach:
    - the fields in AVCodecContext are in general one of
        * stream parameters
        * codec options
        * codec state
      However, it's not clear which ones are which. It is consequently
      unclear which fields are a demuxer allowed to set or a muxer allowed to
      read. This leads to erratic behaviour depending on whether decoding or
      encoding is being performed or not (and whether it uses the AVStream
      embedded codec context).
    - various synchronization issues arising from the fact that the same
      context is used by several different APIs (muxers/demuxers,
      parsers, bitstream filters and encoders/decoders) simultaneously, with
      there being no clear rules for who can modify what and the different
      processes being typically delayed with respect to each other.
    - avformat_find_stream_info() making it necessary to support opening
      and closing a single codec context multiple times, thus
      complicating the semantics of freeing various allocated objects in the
      codec context.

Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.

Originally based on the capture written by
Thilo Borgmann <thilo.borgmann@mail.de>.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

`av_packet_unref` matches the AVFrame ref-counted API and can be used as
a drop in replacement.

Deprecate `av_free_packet`.

avpicture_get_size() -> av_image_get_buffer_size()
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

Deprecated in 10/2012.

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

The rationale is that coded_frame was only used to communicate key_frame,
pict_type and quality to the caller, as well as a few other random fields,
in a non predictable, let alone consistent way.

There was agreement that there was no use case for coded_frame, as it is
a full-sized AVFrame container used for just 2-3 int-sized properties,
which shouldn't even belong into the AVCodecContext in the first place.

The appropriate AVPacket flag can be used instead of key_frame, while
quality is exported with the new AVPacketSideData quality factor.
There is no replacement for the other fields as they were unreliable,
mishandled or just not used at all.
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

Tested on a Raspberry Pi.
Signed-off-by: Martin Storsjö <martin@martin.st>

Found-By: Cheristheus

CC: libav-stable@libav.org
Bug-Id: CID 1292520

Introduced in e8c4db0d.

And notify why the capture is impossible.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

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

Bug-Id: CID 1265785
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

This applies to every library where performance is not critical.

These headers can't be included in any arbitrary order.
Signed-off-by: Martin Storsjö <martin@martin.st>

Also reshuffle headers into canonical order where appropriate.

Bug-Id: CID 1274038

Prevent an use after free in the error message.

Bug-Id: CID 1274040
CC: libav-stable@libav.org