Change #272419

Comments

avcodec/cuviddec: map new NVDEC 4:2:0/4:2:2/4:4:4 output formats
The switch to the new NVDEC pixel formats made cuvid_derive_output_format()
and the format probe select AV_PIX_FMT_P012 for 12-bit 4:2:0,
AV_PIX_FMT_P210/P212 for 10/12-bit 4:2:2 and AV_PIX_FMT_YUV444P10MSB/
YUV444P12MSB for 10/12-bit 4:4:4, but cuvid_handle_video_sequence() still
only mapped the older formats to a CUVID surface format. Decoding such
streams therefore failed with "Unsupported output format" (AVERROR(EINVAL));
because every packet then errored without producing a frame, the failure
could also manifest as a hang rather than a clean error exit. The
system-memory copy path in cuvid_output_frame() rejected the same formats
with AVERROR_BUG.

Map P012 to cudaVideoSurfaceFormat_P016 (mirroring P010), P210/P212 to
cudaVideoSurfaceFormat_P216 (mirroring P216) and YUV444P10MSB/YUV444P12MSB
to cudaVideoSurfaceFormat_YUV444_16Bit (mirroring YUV444P16); the hardware
surface is physically 16-bit and the pixel format only records the number
of valid bits. Add the same formats to the system-memory copy path, whose
per-plane geometry is already derived generically from the pixel descriptor.

Signed-off-by: Diego de Souza <ddesouza@nvidia.com>

Changed files

• libavcodec/cuviddec.c