v4l2: avoid a pair of nested loops if frame rate is constant

15 years ago · 1bb938e4d9
1 changed files with 6 additions and 0 deletions
--- a/modules/access/v4l2/video.c
+++ b/modules/access/v4l2/video.c
@ -926,6 +926,12 @@ int SetupFormat (vlc_object_t *obj, int fd, uint32_t fourcc,
                msg_Dbg (obj, "  with %"PRIu32"x%"PRIu32" steps",
                         fse.stepwise.step_width, fse.stepwise.step_height);

+            if (!(parm->parm.capture.capability & V4L2_CAP_TIMEPERFRAME))
+            {   /* Frame rate is constant, lets maximize resolution */
+                fmt->fmt.pix.width = fse.stepwise.max_width;
+                fmt->fmt.pix.height = fse.stepwise.max_height;
+            }
+            else
            /* FIXME: slow and dumb */
            for (uint32_t width =  fse.stepwise.min_width;
                          width <= fse.stepwise.max_width;