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V4L2 kernel drivers allow configuration of the hardware settings via a mechanism called controls. These can be referred to by name such as "Brightness" and "White Balance Temperature". The user-space command line client for setting these controls (v4l2-ctl) normalises these names such that they only contain lower case alphanumeric characters and the underscore '_'. e.g: Kernel v4l2-ctl ---------------------------------------------------- Brightness brightness White Balance Temperature white_balance_temperature Focus (absolute) focus_absolute GStreamer seems to want to follow this pattern but failed for controls with more than one consecutive non-alphanum character. e.g. GStreamer would produce "focus__absolute_" rather than "focus_absolute". This commit fixes that issue. Backwards compatibility is preserved by normalising all control names before comparison. https://bugzilla.gnome.org/show_bug.cgi?id=725632 |
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gstv4l2.c | ||
gstv4l2bufferpool.c | ||
gstv4l2bufferpool.h | ||
gstv4l2colorbalance.c | ||
gstv4l2colorbalance.h | ||
gstv4l2object.c | ||
gstv4l2object.h | ||
gstv4l2radio.c | ||
gstv4l2radio.h | ||
gstv4l2sink.c | ||
gstv4l2sink.h | ||
gstv4l2src.c | ||
gstv4l2src.h | ||
gstv4l2tuner.c | ||
gstv4l2tuner.h | ||
gstv4l2videodec.c | ||
gstv4l2videodec.h | ||
gstv4l2videooverlay.c | ||
gstv4l2videooverlay.h | ||
gstv4l2vidorient.c | ||
gstv4l2vidorient.h | ||
Makefile.am | ||
README | ||
tuner.c | ||
tuner.h | ||
tunerchannel.c | ||
tunerchannel.h | ||
tunernorm.c | ||
tunernorm.h | ||
v4l2_calls.c | ||
v4l2_calls.h |
v4l2 plugins ============ The idea is a bit the same as the idea for the v4l1 plugins. We want one generic v4l2element, and a few child objects (probably only two: v4l2src and v4l2sink): /-------- v4l2src v4l2element ---= \-------- v4l2sink Both v4l2src and v4l2sink have a uncompressed and a compressed recording-/playback-mode. Since this is all part of v4l2, the 'client' of these elements, i.e. an application using v4l2src/v4l2sink, will hardly notice this. All capsnego stuff is done inside, and the plugin knows which formats are compressed and which are not. Please note that the v4l1 and the v4l2 plugins are *not* compatible concerning properties. Naming has been kept the same where possible, but in some cases, properties had to be removed or added to make full use of v4l2. V4L2 API: http://linux.bytesex.org/v4l2/. http://v4l2spec.bytesex.org/ /usr/include/linux/videodev2.h or Kernel patches available from http://dl.bytesex.org/patches/. Articles: http://lwn.net/Articles/203924/