Drop the padded-copy staging for producer-native NV12 and direct-import the
visible-size buffer at unaligned modes (1080p) too. Safe by the driver's own
contract rather than by allocation luck: native sessions now author the H265
SPS / AV1 sequence header at the RENDER size and pass the matching codedExtent
on every picture resource. RADV rounds the bitstream SPS up itself (with a
conformance window -- radv_video_patch_encode_session_parameters, per the
VK_KHR_video_encode_h265 proposal's "implementations may override" clause) and
programs the VCN session_init with the true extent plus nonzero firmware
padding, so the hardware edge-extends the alignment rows internally and never
fetches past the source's real extent -- the exact mechanism VAAPI/radeonsi has
always used to encode 1080p. The driver-emitted header NALs already carry the
patched SPS, so the wire format is unchanged.
The CSC and RGB-direct paths keep the app-aligned convention (their sources
genuinely cover the aligned extent); RGB padded-copy staging is untouched.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
enricobuehler
004f0cacb8