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Commit a41f9b41 authored by Prashant Laddha's avatar Prashant Laddha Committed by Mauro Carvalho Chehab
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[media] vivid: add support for reduced frame rate in video capture 



With this patch, vivid capture thread can now generate a video with
frame rate reduced by a factor of 1000 / 1001. This option can be
selected using a control Reduced Framerate from gui.

Signed-off-by: default avatarPrashant Laddha <prladdha@cisco.com>
Signed-off-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@osg.samsung.com>
parent c79aa6ae

drivers/media/platform/vivid/vivid-vid-cap.c

+9 −1
Original line number Diff line number Diff line
@@ -405,6 +405,7 @@ void vivid_update_format_cap(struct vivid_dev *dev, bool keep_controls) 
{

	struct v4l2_bt_timings *bt = &dev->dv_timings_cap.bt;

	unsigned size;

	u64 pixelclock;



	switch (dev->input_type[dev->input]) {

	case WEBCAM:
@@ -434,8 +435,15 @@ void vivid_update_format_cap(struct vivid_dev *dev, bool keep_controls) 
		dev->src_rect.width = bt->width;

		dev->src_rect.height = bt->height;

		size = V4L2_DV_BT_FRAME_WIDTH(bt) * V4L2_DV_BT_FRAME_HEIGHT(bt);

		if (dev->reduced_fps && can_reduce_fps(bt)) {

			pixelclock = div_u64(bt->pixelclock * 1000, 1001);

			bt->flags |= V4L2_DV_FL_REDUCED_FPS;

		} else {

			pixelclock = bt->pixelclock;

			bt->flags &= ~V4L2_DV_FL_REDUCED_FPS;

		}

		dev->timeperframe_vid_cap = (struct v4l2_fract) {

			size / 100, (u32)bt->pixelclock / 100

			size / 100, (u32)pixelclock / 100

		};

		if (bt->interlaced)

			dev->field_cap = V4L2_FIELD_ALTERNATE;