A V4L2 transform codec may input/output data on Bayer format.

Add support for that.

suppored -> supported

If a different format is chosen, then these values are incorrect.

Fixes FIXME.

And rename x11 option to ximagesrc.

Fixes #553

The cdata structure was freed but not its caps.
It was already done in gst_v4l2_video_dec_subclass_init() and
gst_v4l2_video_enc_subclass_init().

The function gst_v4l2_object_add_interlace_mode() has repeating code so
it's best use a loop instead. That will make it easy and simple to add
additional interlace modes in a following patch.

Instead of a custom map to translate the interlace modes to strings, let's
make use of the base API provided.

kAudioFormatFlagIsSignedInteger is a format flags

Closes #394

Otherwise, it fails to link.

gst-build#13

This causes 'redefinition of typedef ...' errors on GCC 4.5.3

This is required before we enabled an indent test in the CI.

gstreamer/gstreamer-project#33

The previous patch did not even compile on any possible platform or C
standard. That commit also didn't have a proper commit message.

Android ships Linux with a different signature for ioctl. They first
released an ioctl with int as request type, and later "fixed" it by
adding an override with unsign, which is still not matching Linux and
BSD implementation which uses unsigned long int.

If there was no interlace-mode field in the caps. Read back the value
selected by the driver. This way, if the driver does not support
progressive, then it will automatically negotiate the returned mode
unless this mode is not supported by GStreamer.

This method was already used for colorimetry. Just like colorimetry, the
interlace mode is not longer probed by v4l2src dues to performance
issues.

Fixes #511

https://bugzilla.gnome.org/show_bug.cgi?id=797273

Add HEVC encoder support.

https://bugzilla.gnome.org/show_bug.cgi?id=797141

We can now use the new GstFAllocator to ask the allocator not to close
the wrapped FD. This way the dup is no longer needed.

There is no specific needs to duplicate the FD. Unlike the exportation,
we don't depend on code that will call close. This will make debugging
easyer since the traced FD will match the exporter.

... and fallback to gst_audio_info_set_format for not yet supported layouts.

Fix audio playback on iOS 12.
Based on patch from Byron Schiel <byron@canary.is>

https://bugzilla.gnome.org/show_bug.cgi?id=796919

https://bugzilla.gnome.org/show_bug.cgi?id=771686

This is to support Amlogic CODEC driver which does not provide a full
list of formats when the driver is initially opened. GStreamer does
not strictly need this full list initially, but only later, in order
to negotiate with downstream if multiple format can be selected.

With this change, we will no longer probe twice the device, since the
probed list can be directly used for negotation.

Add a debug message right before waiting for the driver.
This is useful in order to debug drivers without a properly
implemented decoder or encoder stop command.

It's useful to see the v4l2 element running the probe
operation, to confirm it's turned on and working.

This commit adds the support for V4L JPEG stateful encoders.

The recently added vicodec (virtual codec) V4L driver
uses the Fast Walsh-Hadamard Transform for encoding
and decoding.

Add support for it.

This notably add HEVC and FWHT support, and VP8/9 profiles are now an
enumeration and their control exposed as a menu.

This fixes an assertion when the driver implement CROPCAP but does
not set the PAR.

Must define HAVE_IOS, and use appleframeworks dependency to ensure the
right frameworks are picked up.

The propose allocation was offering a pool even in DMABUF_IMPORT or
USERPTR mode. These pool are internal only.

This allow forcing going through the transform driver even if there
isn't an conversion happening. This is usedful when the m2m driver can
be used to adapt the type of memory between two drivers.

This will prevent situation where buffer size allow importing but rendering
goes wrong due to a miss-match in expected stride and offset.

https://bugzilla.gnome.org/show_bug.cgi?id=583890

This method will check if a buffer, base on it's video meta,
can be imported. It will also try and adapt the request stride
in case this is the only that miss-match.

https://bugzilla.gnome.org/show_bug.cgi?id=583890

https://bugzilla.gnome.org/show_bug.cgi?id=583890

https://bugzilla.gnome.org/show_bug.cgi?id=583890

The preparation code imports the buffer, doing bunch of
validation. Only queue the buffer in the driver if the
importation worked. This way we don't rely on the driver
to validate.

https://bugzilla.gnome.org/show_bug.cgi?id=583890

DMABuf exportation requires mmap, which requires STREAMING
capabilities.

https://bugzilla.gnome.org/show_bug.cgi?id=583890

This change has no effect. We will need to acquire a buffer from the
pool later in order to validate / adapt with the video alignment for
the downstream buffers.

https://bugzilla.gnome.org/show_bug.cgi?id=583890