diff options
| author | Paul Elder <paul.elder@ideasonboard.com> | 2018-08-28 02:17:15 -0400 |
|---|---|---|
| committer | Paul Elder <paul.elder@ideasonboard.com> | 2019-02-06 01:49:31 -0500 |
| commit | bde4deb8803026ec69e11cd380d77bf5d33ee623 (patch) | |
| tree | 779af4610ffc29499b7d4b672c7a5e75c4cadeb2 /lib | |
| parent | 28c16c6dc72f4c41307f1a317860791c595cdcd6 (diff) | |
stream, uvc: add uvc_stream_set_frame_rate
We would like to be able to set the frame rate of the video source of a
stream. This patch adds such a function to set the source's frame rate
from the stream. The frame rate is set right after the format is set.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/stream.c | 6 | ||||
| -rw-r--r-- | lib/uvc.c | 5 |
2 files changed, 11 insertions, 0 deletions
diff --git a/lib/stream.c b/lib/stream.c index 19f0d78..168dc71 100644 --- a/lib/stream.c +++ b/lib/stream.c @@ -156,6 +156,12 @@ int uvc_stream_set_format(struct uvc_stream *stream, return video_source_set_format(stream->src, &fmt); } +int uvc_stream_set_frame_rate(struct uvc_stream *stream, unsigned int fps) +{ + printf("=== Setting frame rate to %u fps\n", fps); + return video_source_set_frame_rate(stream->src, fps); +} + /* --------------------------------------------------------------------------- * Stream handling */ @@ -269,6 +269,7 @@ uvc_events_process_data(struct uvc_device *dev, const struct uvc_function_config_format *format; const struct uvc_function_config_frame *frame; struct v4l2_pix_format pixfmt; + unsigned int fps; format = &dev->fc->streaming.formats[target->bFormatIndex-1]; frame = &format->frames[target->bFrameIndex-1]; @@ -286,6 +287,10 @@ uvc_events_process_data(struct uvc_device *dev, pixfmt.sizeimage = dev->maxsize * 1.5; uvc_stream_set_format(dev->stream, &pixfmt); + + /* fps is guaranteed to be non-zero and thus valid. */ + fps = 1.0 / (target->dwFrameInterval / 10000000.0); + uvc_stream_set_frame_rate(dev->stream, fps); } } |