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 DELETE_BUFS ioctl and remove the 32 buffers limit per queue. VP9 conformance tests using fluster give a score of 210/305. The 23 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_v18 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 18: - rebased on top of: https://patchwork.linuxtv.org/project/linux-media/patch/20240118121452.29151-1-benjamin.gaignard@xxxxxxxxxxxxx/ https://patchwork.linuxtv.org/project/linux-media/patch/92975c06-d6e1-4ba6-8d03-b2ef0b199c21@xxxxxxxxx/ - Add a patch to update vb2_is_busy() logic. - fix __vb2_queue_alloc() parameters descriptions. - rework bitmap free range finding loop - remove per queue capability flag. - rework v4l_delete_bufs() to check if VIDIOC_CREATE_BUFS is enabled and if vidioc_delete_bufs pointer is valid. - update documentation. - Direclty use vb2_core_delete_bufs() in v4l2_m2m_ioctl_delete_bufs(). Remove useless static functions. changes in version 17: - rebased on top of: https://patchwork.linuxtv.org/project/linux-media/patch/20240118121452.29151-1-benjamin.gaignard@xxxxxxxxxxxxx/ https://patchwork.linuxtv.org/project/linux-media/patch/92975c06-d6e1-4ba6-8d03-b2ef0b199c21@xxxxxxxxx/ - rewrite min_reqbufs_allocation field documentation. - rewrite vb2_core_create_bufs() first_index parameter documentation. - rework bitmap allocation usage in __vb2_queue_alloc(). - remove useless i < q->max_num_buffers checks. - rework DELETE_BUFS documentation. - change split between patch 7 and patch 8 - v4l2_m2m_delete_bufs() is now a static function. changes in version 16: - The 50 patches related to add helpers for queue num_bufefrs have already been merged. - 'min_queued_buffers' patch has been merged too. - Add 'min_reqbufs_allocation' field in vb2_queue structure. - Take care of 'min_queued_buffers' when deleting buffers - Add more check about buffers range limit when deleting buffers. Benjamin 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 DELETE_BUFS ioctl media: v4l2: Add mem2mem helpers for DELETE_BUFS ioctl media: verisilicon: Support deleting buffers on capture queue .../userspace-api/media/v4l/user-func.rst | 1 + .../media/v4l/vidioc-delete-bufs.rst | 78 ++++++ .../media/common/videobuf2/videobuf2-core.c | 225 ++++++++++++------ .../media/common/videobuf2/videobuf2-v4l2.c | 26 +- .../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 | 1 + drivers/media/v4l2-core/v4l2-ioctl.c | 28 +++ 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 | 16 ++ 18 files changed, 371 insertions(+), 86 deletions(-) create mode 100644 Documentation/userspace-api/media/v4l/vidioc-delete-bufs.rst -- 2.40.1
