If the the height is not a multiple of the macro block size then the memory
of the last line is reused for all extra lines. This is no problem if the
last line is duplicated properly. However, if the extra lines are not
initialized properly during encoding, then the last visible line is
overwritten with undefined data.
Use a extra buffer to avoid this problem.
This effectively (but optionally) requires libjpeg-turbo which
ships with a .pc file and is what pretty much everyone these days
uses anyway for libjpeg, so shouldn't be a problem hopefully.
https://bugzilla.gnome.org/show_bug.cgi?id=796947
Like pngenc, automatically send an EOS message.
Example of bin:
appsrc ! jpegenc snapshot=true ! filesink location=out.jpg
This is especially useful for limited/slow hardware.
Otherwise calling gst_video_convert_sample() is a better option
(internally uses videoconvert and videoscale).
https://bugzilla.gnome.org/show_bug.cgi?id=755453
Some cameras fail to send an end-of-image marker (EOI)
and can't be properly decoded by either JPEG or libjpeg.
This commit parses the frame, making sure it has an EOI.
If there isn't one, the EOI gets added to the buffer.
A similar fixup is done in the rtpjpegdepay element,
and it makes sense to do it in jpegdec as well.
Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
https://bugzilla.gnome.org/show_bug.cgi?id=791988
https://github.com/mesonbuild/meson
With contributions from:
Tim-Philipp Müller <tim@centricular.com>
Jussi Pakkanen <jpakkane@gmail.com> (original port)
Highlights of the features provided are:
* Faster builds on Linux (~40-50% faster)
* The ability to build with MSVC on Windows
* Generate Visual Studio project files
* Generate XCode project files
* Much faster builds on Windows (on-par with Linux)
* Seriously fast configure and building on embedded
... and many more. For more details see:
http://blog.nirbheek.in/2016/05/gstreamer-and-meson-new-hope.htmlhttp://blog.nirbheek.in/2016/07/building-and-developing-gstreamer-using.html
Building with Meson should work on both Linux and Windows, but may
need a few more tweaks on other operating systems.
The heuristic to choose between packetise or not was change to use the
segment format. The problem is that this change is reading the segment
during the caps event handling. The segment event will only be sent
after. That prevented the decoder to go in packetize mode, and avoid
useless parsing.
https://bugzilla.gnome.org/show_bug.cgi?id=736252
We already pass the entire frame to the decoder. If the decoder ask for
more data, don't pass the same data again as this leads to infinit loop.
Instead, simply fail the fill function to signal the problem with that
frame. It will then be skipped properly.
https://bugzilla.gnome.org/show_bug.cgi?id=761670
When jpeg_finish_decompress is called, output state reference is being created.
But if there is any failures in finishing decompress, it jumps to setjmp,
and at that point state was not referenced. Resulting in leak of output state.
Hence adding another setjmp after output state is referenced.
Similarly adding another setjmp to unmap the frame in case error happens before
finish_decompress
https://bugzilla.gnome.org/show_bug.cgi?id=753087
handle_frame() is supposed to consume @frame, so if we don't call
gst_video_decoder_drop_frame() or gst_video_decoder_finish_frame() we have to
release it manually.
https://bugzilla.gnome.org/show_bug.cgi?id=748909
packetized mode is being set when framerate is being set
which is not correct. Changing the same by checking the
input segement format. If input segment is in TIME it is
Packetized, and if it is in BYTES it is not.
https://bugzilla.gnome.org/show_bug.cgi?id=736252
The base videodecoder class has an error counting feature to tolerate
a few errors before posting an error message. So don't force the
error and let the base class decide when it should happen
https://bugzilla.gnome.org/show_bug.cgi?id=710762
Since jpegdec already parse the jpeg stream, the sink caps could be
relaxed. This will allow jpegdec to be selected in more case and in
particular when the jpeg typefinder does not find the width and height.
https://bugzilla.gnome.org/show_bug.cgi?id=709352
Now that the subset check actually works, this breaks
things with demuxers that don't put a "sof-marker"
in their jpeg caps, and we don't have a good parser
to plug either yet.
