Add patches to prefer contiguous video format and supporting dmabuf-import mode for video decoder.
This is to support use-cases involving video codec with other components viz. GPU, Camera e.t.c. For 0002-v4l2-Give-preference-to-contiguous-format-if-support.patch : There are certain blocks such as camera, GPU which only seem to support well the contigous formats (sometimes at the S/W level) which doesn't go well with gstreamer v4l2 which prefers non-contigous by default and we fail at negotiation. The crux of the issue is that unlike v4l2 gstreamer has only single GST video format for both NV12 and NV12M (non-contigous) and it prefers to advertise latter during caps negotiation. There was a proposal made long back to have separate GST video formats for NV12 and NV12M but that didn't converge, perhaps they wanted to support this with a VideoMeta based scheme as per logs [0]. For 0001-v4l2-Changes-for-DMA-Buf-import-j721s2.patch : This is a local patch which complements a patch already made available in driver to support dmabuf import for the decoder. Here the gist of the issue is that v4l2 framework expects userspace to make sure it uses same v4l2 buffer index each time with same backing memory as kernel framework relies on these indices to identify frame ordering [2]. There again is discussion around this to support this in upstream but the upstream patch is not yet merged [1]. [0]: https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/issues/414 [1]: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4550/diffs?commit_id=b12eaf65f489bab50917e22242758e000d69df58 [2]: https://www.kernel.org/doc/html/latest/userspace-api/media/v4l/dev-decoder.html Signed-off-by: Devarsh Thakkar <[email protected]> --- .../gstreamer/gstreamer1.0-plugins-good_1.20.%.bbappend | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/meta-arago-extras/recipes-multimedia/gstreamer/gstreamer1.0-plugins-good_1.20.%.bbappend b/meta-arago-extras/recipes-multimedia/gstreamer/gstreamer1.0-plugins-good_1.20.%.bbappend index a36c9760..e14a3c93 100644 --- a/meta-arago-extras/recipes-multimedia/gstreamer/gstreamer1.0-plugins-good_1.20.%.bbappend +++ b/meta-arago-extras/recipes-multimedia/gstreamer/gstreamer1.0-plugins-good_1.20.%.bbappend @@ -20,4 +20,8 @@ SRC_URI:append:am62axx = " \ file://0002-v4l2-Give-preference-to-contiguous-format-if-support.patch \ " +SRC_URI:append:am62pxx = " \ + file://0001-v4l2-Changes-for-DMA-Buf-import-j721s2.patch \ + file://0002-v4l2-Give-preference-to-contiguous-format-if-support.patch \ +" PR:append = ".arago0" -- 2.34.1 -=-=-=-=-=-=-=-=-=-=-=- Links: You receive all messages sent to this group. View/Reply Online (#15053): https://lists.yoctoproject.org/g/meta-arago/message/15053 Mute This Topic: https://lists.yoctoproject.org/mt/103107233/21656 Group Owner: [email protected] Unsubscribe: https://lists.yoctoproject.org/g/meta-arago/unsub [[email protected]] -=-=-=-=-=-=-=-=-=-=-=-
