Hi,
This patch set implements region of interest (ROI) ctrls for video
encoder.
One video encoder IP may support the following two ROI configurations or
one of them:
1. configure ROI as a rectangular region, and set a delta QP parameter.
2. configure ROI as a rectangular region, and set a priority parameter.
3. configure ROI as a QP map as an array. Each value represents the delta QP
of a block in raster scan order. The block size is determined by
the specific IP.
4. configure ROI as a QP map as an array. Each value represents the absolute QP
of a block in raster scan order. The block size is determined by
the specific IP.
To achieve this, I made the following change:
1. I reuse the type V4L2_CTRL_TYPE_RECT that is defined in the UVC ROI patchset
2. Define a ctrl V4L2_CID_MPEG_VIDEO_ROI_MODE to choose ROI configuration
3. Define some ctrl to configure ROI
4. Define a ctrl V4L2_CID_MPEG_VIDEO_ROI_BLOCK_SIZE to query block size
I referred the patchset "Implement UVC v1.5 ROI" (https://lwn.net/Articles/953532/)
and pick some patches from it.
changelog:
v3
- Drop the type V4L2_CTRL_TYPE_REGION
- Split the compound control into 2 ctrls
- Define 4 ROI mode
v2
- export symbol of v4l2_ctrl_type_op_minimum
- export symbol of v4l2_ctrl_type_op_maximum
Hans Verkuil (1):
media: v4l2-ctrls: add support for V4L2_CTRL_WHICH_MIN/MAX_VAL
Ming Qian (1):
media: v4l2-ctrls: Add video encoder ROI ctrls
Yunke Cao (2):
media: v4l2_ctrl: Add V4L2_CTRL_TYPE_RECT
media: vivid: Add an rectangle control
.../media/v4l/ext-ctrls-codec.rst | 95 ++++++++++
.../media/v4l/vidioc-g-ext-ctrls.rst | 26 ++-
.../media/v4l/vidioc-queryctrl.rst | 14 ++
.../media/videodev2.h.rst.exceptions | 4 +
drivers/media/i2c/imx214.c | 4 +-
.../media/platform/qcom/venus/venc_ctrls.c | 9 +-
.../media/test-drivers/vivid/vivid-ctrls.c | 34 ++++
drivers/media/v4l2-core/v4l2-ctrls-api.c | 54 ++++--
drivers/media/v4l2-core/v4l2-ctrls-core.c | 169 +++++++++++++++---
drivers/media/v4l2-core/v4l2-ctrls-defs.c | 46 +++++
drivers/media/v4l2-core/v4l2-ioctl.c | 4 +-
include/media/v4l2-ctrls.h | 62 ++++++-
include/uapi/linux/v4l2-controls.h | 16 ++
include/uapi/linux/videodev2.h | 5 +
14 files changed, 493 insertions(+), 49 deletions(-)
--
2.43.0-rc1
