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5de27e0620
The videoencoder base class always uses the negotiated allocator for allocating coded buffers and ignores the negotiated buffer pool. Therefore, the v4l2videoenc always has to copy buffers from the pool into the allocated output buffers. This breaks downstream elements that want to import the CAPTURE buffers of the v4l2videoenc, since the v4l2videoenc copies the exported CAPTURE buffers and sends the copies downstream. Always use the CAPTURE buffer pool for acquiring CAPTURE buffers instead of allocating the buffers in the base class. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4230> |
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| .. | ||
| ext | ||
| gstv4l2.c | ||
| gstv4l2allocator.c | ||
| gstv4l2allocator.h | ||
| gstv4l2bufferpool.c | ||
| gstv4l2bufferpool.h | ||
| gstv4l2codec.c | ||
| gstv4l2codec.h | ||
| gstv4l2colorbalance.c | ||
| gstv4l2colorbalance.h | ||
| gstv4l2deviceprovider.c | ||
| gstv4l2deviceprovider.h | ||
| gstv4l2element.c | ||
| gstv4l2elements.h | ||
| gstv4l2fwhtenc.c | ||
| gstv4l2fwhtenc.h | ||
| gstv4l2h263enc.c | ||
| gstv4l2h263enc.h | ||
| gstv4l2h264codec.c | ||
| gstv4l2h264codec.h | ||
| gstv4l2h264enc.c | ||
| gstv4l2h264enc.h | ||
| gstv4l2h265codec.c | ||
| gstv4l2h265codec.h | ||
| gstv4l2h265enc.c | ||
| gstv4l2h265enc.h | ||
| gstv4l2jpegenc.c | ||
| gstv4l2jpegenc.h | ||
| gstv4l2mpeg2codec.c | ||
| gstv4l2mpeg2codec.h | ||
| gstv4l2mpeg4codec.c | ||
| gstv4l2mpeg4codec.h | ||
| gstv4l2mpeg4enc.c | ||
| gstv4l2mpeg4enc.h | ||
| gstv4l2object.c | ||
| gstv4l2object.h | ||
| gstv4l2radio.c | ||
| gstv4l2radio.h | ||
| gstv4l2sink.c | ||
| gstv4l2sink.h | ||
| gstv4l2src.c | ||
| gstv4l2src.h | ||
| gstv4l2transform.c | ||
| gstv4l2transform.h | ||
| gstv4l2tuner.c | ||
| gstv4l2tuner.h | ||
| gstv4l2videodec.c | ||
| gstv4l2videodec.h | ||
| gstv4l2videoenc.c | ||
| gstv4l2videoenc.h | ||
| gstv4l2vidorient.c | ||
| gstv4l2vidorient.h | ||
| gstv4l2vp8codec.c | ||
| gstv4l2vp8codec.h | ||
| gstv4l2vp8enc.c | ||
| gstv4l2vp8enc.h | ||
| gstv4l2vp9codec.c | ||
| gstv4l2vp9codec.h | ||
| gstv4l2vp9enc.c | ||
| gstv4l2vp9enc.h | ||
| meson.build | ||
| README | ||
| tuner.c | ||
| tuner.h | ||
| tunerchannel.c | ||
| tunerchannel.h | ||
| tunernorm.c | ||
| tunernorm.h | ||
| v4l2-utils.c | ||
| v4l2-utils.h | ||
| v4l2_calls.c | ||
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/