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Date: Wed, 13 Jan 2016 20:03:30 +0800 From: Wu-Cheng Li <wuchengli@...omium.org> To: pawel@...iak.com, mchehab@....samsung.com, hverkuil@...all.nl, k.debski@...sung.com, crope@....fi, standby24x7@...il.com, wuchengli@...omium.org, nicolas.dufresne@...labora.com, ricardo.ribalda@...il.com, ao2@....it, bparrot@...com Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org, linux-api@...r.kernel.org Subject: [PATCH] v4l: add V4L2_CID_MPEG_VIDEO_FORCE_FRAME_TYPE Some drivers also need a control like V4L2_CID_MPEG_MFC51_VIDEO_FORCE_FRAME_TYPE to force an encoder frame type. This patch adds a general V4L2_CID_MPEG_VIDEO_FORCE_FRAME_TYPE. This control only affects the next queued buffer. There's no need to clear the value after requesting an I frame. But all controls are set in v4l2_ctrl_handler_setup. So a default DISABLED value is required. Basically this control is like V4L2_CTRL_TYPE_BUTTON with parameters. How to prevent a control from being set in v4l2_ctrl_handler_setup so DISABLED value is not needed? Does it make sense not to set a control if it is EXECUTE_ON_WRITE? Wu-Cheng Li (1): v4l: add V4L2_CID_MPEG_VIDEO_FORCE_FRAME_TYPE. Documentation/DocBook/media/v4l/controls.xml | 23 +++++++++++++++++++++++ drivers/media/v4l2-core/v4l2-ctrls.c | 13 +++++++++++++ include/uapi/linux/v4l2-controls.h | 5 +++++ 3 files changed, 41 insertions(+) -- 2.6.0.rc2.230.g3dd15c0
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