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.
Cc: Hans Verkuil <hans.verk...@cisco.com>
Signed-off-by: Prashant Laddha <prlad...@cisco.com>
---
drivers/media/platform/vivid/vivid-vid-cap.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/media/platform/vivid/vivid-vid-cap.c
b/drivers/media/platform/vivid/vivid-vid-cap.c
index ed0b878..74ba98f 100644
--- a/drivers/media/platform/vivid/vivid-vid-cap.c
+++ b/drivers/media/platform/vivid/vivid-vid-cap.c
@@ -401,6 +401,7 @@ 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:
@@ -430,8 +431,15 @@ 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;
--
1.9.1
--
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