Stanimir, Would it be possible to get this in the 6.13 pull request? Thanks. On Tue, Oct 22, 2024 at 10:40 AM Fritz Koenig <frkoenig@xxxxxxxxxxxx> wrote: > > v5: > - fixed formatting > - included reviwed by for patch 2 > - Link to v4: https://lore.kernel.org/r/20241017-submit-v4-0-d852bc7f7fdc@xxxxxxxxxxxx > > v4: > - addressed feedback from Dikshita > - included reviewed by for patch 1 > - Link to v3: https://lore.kernel.org/r/20240814-submit-v3-0-f7d05e3e8560@xxxxxxxxxxxx > > v3: > - dropped reordering patch > - updated cover letter > > v2: > - cover letter > - testing methodology > - Signed-off-by > > V4L2 has support for encoding with hierarchical frames using the > V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING* controls. This allows for > specifing frame references needed for temporal scalability. Encoding a > single stream with a single layer allows for the layer to be dropped and > the stream to be decoded without artifacts. > > ChromeOS is planning to use this feature for the L1T2 web standard[1]. > This allows video conferencing apps to encode once for a clients with > different performance/bandwidth capabilities. As the application is a > real time encoder only P frame support is added. > > The ChromeOS test framework ("tast") was used to verify that no > regressions are present. This was done on SC7180 ("trogdor"). These > patches were also run on SC7280, but not with as an extensive test set. > > Verification of the added controls was done with a bitstream analyser to > make sure that reference frame management is correct. > > [1]: https://www.w3.org/TR/webrtc-svc/#L1T2* > > Signed-off-by: Fritz Koenig <frkoenig@xxxxxxxxxxxx> > --- > Fritz Koenig (2): > media: venus: Helper function for dynamically updating bitrate > media: venus: Enable h.264 hierarchical coding > > drivers/media/platform/qcom/venus/core.h | 4 + > drivers/media/platform/qcom/venus/venc.c | 71 +++++++++----- > drivers/media/platform/qcom/venus/venc_ctrls.c | 126 ++++++++++++++++++++++--- > 3 files changed, 164 insertions(+), 37 deletions(-) > --- > base-commit: d07b43284ab356daf7ec5ae1858a16c1c7b6adab > change-id: 20240814-submit-05880a074377 > > Best regards, > -- > Fritz Koenig <frkoenig@xxxxxxxxxxxx> >
