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Wed, 17 Dec 2025 14:34:35 +0100 (CET) Message-ID: <0482b76919217cf007d0abe1c683e862903a1a40.camel@collabora.com> Subject: Re: [PATCH v5 01/15] media: uapi: HEVC: Add v4l2_ctrl_hevc_ext_sps_[ls]t_rps controls From: Nicolas Dufresne To: Detlev Casanova , Hans Verkuil , linux-kernel@vger.kernel.org Cc: Mauro Carvalho Chehab , Ezequiel Garcia , Heiko Stuebner , Ricardo Ribalda , Hans Verkuil , Hans de Goede , Yunke Cao , Jonathan Corbet , Laurent Pinchart , Sakari Ailus , James Cowgill , linux-media@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, kernel@collabora.com Date: Wed, 17 Dec 2025 08:34:33 -0500 In-Reply-To: References: <20251023214247.459931-1-detlev.casanova@collabora.com> <20251023214247.459931-2-detlev.casanova@collabora.com> <37da2fe3-41bd-470e-bb6c-93fe35ee1528@collabora.com> Autocrypt: addr=nicolas.dufresne@collabora.com; prefer-encrypt=mutual; keydata=mDMEaCN2ixYJKwYBBAHaRw8BAQdAM0EHepTful3JOIzcPv6ekHOenE1u0vDG1gdHFrChD /e0J05pY29sYXMgRHVmcmVzbmUgPG5pY29sYXNAbmR1ZnJlc25lLmNhPoicBBMWCgBEAhsDBQsJCA cCAiICBhUKCQgLAgQWAgMBAh4HAheABQkJZfd1FiEE7w1SgRXEw8IaBG8S2UGUUSlgcvQFAmibrjo CGQEACgkQ2UGUUSlgcvQlQwD/RjpU1SZYcKG6pnfnQ8ivgtTkGDRUJ8gP3fK7+XUjRNIA/iXfhXMN abIWxO2oCXKf3TdD7aQ4070KO6zSxIcxgNQFtDFOaWNvbGFzIER1ZnJlc25lIDxuaWNvbGFzLmR1Z nJlc25lQGNvbGxhYm9yYS5jb20+iJkEExYKAEECGwMFCwkIBwICIgIGFQoJCAsCBBYCAwECHgcCF4 AWIQTvDVKBFcTDwhoEbxLZQZRRKWBy9AUCaCyyxgUJCWX3dQAKCRDZQZRRKWBy9ARJAP96pFmLffZ smBUpkyVBfFAf+zq6BJt769R0al3kHvUKdgD9G7KAHuioxD2v6SX7idpIazjzx8b8rfzwTWyOQWHC AAS0LU5pY29sYXMgRHVmcmVzbmUgPG5pY29sYXMuZHVmcmVzbmVAZ21haWwuY29tPoiZBBMWCgBBF iEE7w1SgRXEw8IaBG8S2UGUUSlgcvQFAmibrGYCGwMFCQll93UFCwkIBwICIgIGFQoJCAsCBBYCAw ECHgcCF4AACgkQ2UGUUSlgcvRObgD/YnQjfi4+L8f4fI7p1pPMTwRTcaRdy6aqkKEmKsCArzQBAK8 bRLv9QjuqsE6oQZra/RB4widZPvphs78H0P6NmpIJ Organization: Collabora Canada Content-Type: multipart/signed; micalg="pgp-sha512"; protocol="application/pgp-signature"; boundary="=-L53cNKzQuROd39WEVXeE" User-Agent: Evolution 3.58.2 (3.58.2-1.fc43) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 --=-L53cNKzQuROd39WEVXeE Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi, Le mardi 16 d=C3=A9cembre 2025 =C3=A0 17:18 -0500, Detlev Casanova a =C3=A9= crit=C2=A0: > > Before going that route, how big are these two arrays ? Short term can = be 64 > > ref, long term 32, how big in bytes that is ? Was is worth goign with > > dynamic > > array ? Its not like slices, where we can have 600 or more. >=20 > The short term one can still be quite big, it's about 80 bytes per=20 > element, so 5120 bytes for the 64. >=20 > I don't know how often we go that high, I've seen around 10 short term= =20 > ref sets in test videos. We've never defined a threshold, so its hard to just define which direction= to go. I generally think using dynamic array was logical thing to do though. Nicolas --=-L53cNKzQuROd39WEVXeE Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQTvDVKBFcTDwhoEbxLZQZRRKWBy9AUCaUKxaQAKCRDZQZRRKWBy 9DvsAP0Q2NNHxc8jrYFvxcg9jsWj09g2eOj92V1QsYgjR4pNVQEA2eK88BefxbvK v1zF5F4ZJe7rb2RMaHpvkmxnnK28cww= =3ld5 -----END PGP SIGNATURE----- --=-L53cNKzQuROd39WEVXeE--