| From de5758394b0ea66dc7fb3afbec88ea68dc0f5b2e Mon Sep 17 00:00:00 2001 |
| From: henryhsu <henryhsu@chromium.org> |
| Date: Thu, 20 Aug 2015 17:57:58 +0800 |
| Subject: [PATCH] [media] v4l: Add pixelformat change event |
| |
| This event indicates that the video device has encountered a |
| pixelformat change during runtime. This event can be detected by a |
| decoder or a capture device. |
| |
| Take decoder for example, input pixelformat change may affect |
| output format change. |
| This needs to be notified to the userspace and the application must |
| be expected to get format and reallocate buffers before proceeding. |
| If multiple events occurred before application could dequeue them, |
| then the changes will have the ORed value of all the events generated. |
| |
| BUG=chromium:426383 |
| TEST=build kernel and pass |
| |
| Change-Id: Idb3f74adb662a4f897fb4323ab72e162d063f76a |
| Signed-off-by: Henry-Ruey Hsu <henryhsu@chromium.org> |
| Reviewed-on: https://chromium-review.googlesource.com/294147 |
| Commit-Ready: Heng-ruey Hsu <henryhsu@chromium.org> |
| Tested-by: Heng-ruey Hsu <henryhsu@chromium.org> |
| Reviewed-by: Tomasz Figa <tfiga@chromium.org> |
| --- |
| |
| --- include/uapi/linux/videodev2.h 2015-08-20 18:34:10.172340830 +0800 |
| +++ include/uapi/linux/videodev2.h 2015-08-20 18:34:12.744312208 +0800 |
| @@ -1982,6 +1982,7 @@ |
| }; |
| |
| #define V4L2_EVENT_SRC_CH_RESOLUTION (1 << 0) |
| +#define V4L2_EVENT_SRC_CH_PIXELFORMAT (1 << 1) |
| |
| struct v4l2_event_src_change { |
| __u32 changes; |
