v2.6.0

Minor release adding V4L2 buffer flags to camera buffers so callers can tell which clock and which instant within the frame a capture timestamp refers to, and fixing format enumeration on single-plane capture devices. Adds one exported symbol (vsl_camera_buffer_flags); SOVERSION stays at 2 and existing symbols are unchanged.

Added

• vsl_camera_buffer_flags() / CameraBuffer::flags() — raw struct v4l2_buffer::flags for each dequeued buffer, so callers can tell which clock and which instant within the frame vsl_camera_buffer_timestamp() reports. Tagged VSL_AVAILABLE_SINCE_2_6. (EDGEAI-1938)
• CameraBuffer::timestamp_clock() / CameraBuffer::timestamp_source() — Rust decoders for the timestamp bits of the flags, returning TimestampClock (Monotonic, Copy, Unknown) and TimestampSource (EndOfFrame, StartOfExposure, Unknown). (EDGEAI-1938)

Fixed

• vsl_camera_enum_fmts() returned no formats on single-plane capture devices when called before vsl_camera_init_device(), which is how CameraBuilder::formats() uses it (lib/v4l2.c). The buffer type was only detected during device initialisation, so a freshly opened device was always queried as multi-planar. vsl_camera_open_device() now detects it. Seen on the i.MX 8M Plus VeriSilicon ISP (viv_v4l2); the ISI and i.MX 95 capture nodes are multi-planar and were unaffected. (EDGEAI-1556)