[PATCH v20 0/9] Add REMOVE_BUF ioctl
From: Benjamin Gaignard
Date: Wed Feb 21 2024 - 10:55:22 EST
Unlike when resolution change on keyframes, dynamic resolution change
on inter frames doesn't allow to do a stream off/on sequence because
it is need to keep all previous references alive to decode inter frames.
This constraint have two main problems:
- more memory consumption.
- more buffers in use.
To solve these issue this series introduce REMOVE_BUFS ioctl.
VP9 conformance tests using fluster give a score of 210/305.
The 24 of the 24 resize inter tests (vp90-2-21-resize_inter_* files) are ok
but require to use postprocessor.
Kernel branch is available here:
https://gitlab.collabora.com/benjamin.gaignard/for-upstream/-/commits/remove_vb2_queue_limit_v20
GStreamer branch to use DELETE_BUF ioctl and testing dynamic resolution
change is here:
https://gitlab.freedesktop.org/benjamin.gaignard1/gstreamer/-/commits/VP9_drc
changes in version 20:
- Rename DELETE_BUFS into REMOVE_BUFS
- Change documention, structure and variables name to use 'remove'
changes in version 19:
- Fix typo in commit message.
- Fix ioctl domentation
- Rework q->is_busy patch following Hans's comments
- Change where DELETE_BUFS is enabled
Benjamin Gaignard (9):
media: videobuf2: Update vb2_is_busy() logic
videobuf2: Add min_reqbufs_allocation field to vb2_queue structure
media: test-drivers: Set REQBUFS minimum number of buffers
media: core: Rework how create_buf index returned value is computed
media: core: Add bitmap manage bufs array entries
media: core: Free range of buffers
media: v4l2: Add REMOVE_BUFS ioctl
media: v4l2: Add mem2mem helpers for REMOVE_BUFS ioctl
media: verisilicon: Support removing buffers on capture queue
.../userspace-api/media/v4l/user-func.rst | 1 +
.../media/v4l/vidioc-remove-bufs.rst | 82 +++++++
.../media/v4l/vidioc-reqbufs.rst | 1 +
.../media/common/videobuf2/videobuf2-core.c | 223 ++++++++++++------
.../media/common/videobuf2/videobuf2-v4l2.c | 28 ++-
.../media/platform/verisilicon/hantro_v4l2.c | 1 +
.../media/test-drivers/vicodec/vicodec-core.c | 1 +
drivers/media/test-drivers/vim2m.c | 1 +
.../media/test-drivers/vimc/vimc-capture.c | 3 +-
drivers/media/test-drivers/visl/visl-video.c | 1 +
drivers/media/test-drivers/vivid/vivid-core.c | 5 +-
drivers/media/v4l2-core/v4l2-dev.c | 3 +
drivers/media/v4l2-core/v4l2-ioctl.c | 32 +++
drivers/media/v4l2-core/v4l2-mem2mem.c | 10 +
include/media/v4l2-ioctl.h | 4 +
include/media/v4l2-mem2mem.h | 2 +
include/media/videobuf2-core.h | 52 +++-
include/media/videobuf2-v4l2.h | 2 +
include/uapi/linux/videodev2.h | 17 ++
19 files changed, 383 insertions(+), 86 deletions(-)
create mode 100644 Documentation/userspace-api/media/v4l/vidioc-remove-bufs.rst
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2.40.1