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v4l2: only set framerate for capture for now

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This commit is contained in:
Wim Taymans 2011-07-13 11:29:26 +02:00
parent 9f4cf3be58
commit 50ce1807f0
1 changed files with 31 additions and 29 deletions
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60
sys/v4l2/gstv4l2object.c
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@ -2164,37 +2164,39 @@ gst_v4l2_object_set_format (GstV4l2Object * v4l2object, GstCaps * caps)
if (v4l2_ioctl (fd, VIDIOC_G_PARM, streamparm) < 0)
goto get_parm_failed;
GST_DEBUG_OBJECT (v4l2object->element, "Got framerate: %u/%u",
streamparm->parm.capture.timeperframe.denominator,
streamparm->parm.capture.timeperframe.numerator);
if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
GST_DEBUG_OBJECT (v4l2object->element, "Got framerate: %u/%u",
streamparm->parm.capture.timeperframe.denominator,
streamparm->parm.capture.timeperframe.numerator);
/* Note: V4L2 provides the frame interval, we have the frame rate */
if (!fractions_are_equal (streamparm->parm.capture.timeperframe.numerator,
streamparm->parm.capture.timeperframe.denominator, fps_d, fps_n)) {
GST_LOG_OBJECT (v4l2object->element, "Setting framerate to %u/%u", fps_n,
fps_d);
/* We want to change the frame rate, so check whether we can. Some cheap USB
* cameras don't have the capability */
if ((streamparm->parm.capture.capability & V4L2_CAP_TIMEPERFRAME) == 0) {
GST_DEBUG_OBJECT (v4l2object->element,
"Not setting framerate (not supported)");
goto done;
/* Note: V4L2 provides the frame interval, we have the frame rate */
if (!fractions_are_equal (streamparm->parm.capture.timeperframe.numerator,
streamparm->parm.capture.timeperframe.denominator, fps_d, fps_n)) {
GST_LOG_OBJECT (v4l2object->element, "Setting framerate to %u/%u", fps_n,
fps_d);
/* We want to change the frame rate, so check whether we can. Some cheap USB
* cameras don't have the capability */
if ((streamparm->parm.capture.capability & V4L2_CAP_TIMEPERFRAME) == 0) {
GST_DEBUG_OBJECT (v4l2object->element,
"Not setting framerate (not supported)");
goto done;
}
/* Note: V4L2 wants the frame interval, we have the frame rate */
streamparm->parm.capture.timeperframe.numerator = fps_d;
streamparm->parm.capture.timeperframe.denominator = fps_n;
/* some cheap USB cam's won't accept any change */
if (v4l2_ioctl (fd, VIDIOC_S_PARM, streamparm) < 0)
goto set_parm_failed;
/* get new values */
fps_d = streamparm->parm.capture.timeperframe.numerator;
fps_n = streamparm->parm.capture.timeperframe.denominator;
GST_INFO_OBJECT (v4l2object->element, "Set framerate to %u/%u", fps_n,
fps_d);
}
/* Note: V4L2 wants the frame interval, we have the frame rate */
streamparm->parm.capture.timeperframe.numerator = fps_d;
streamparm->parm.capture.timeperframe.denominator = fps_n;
/* some cheap USB cam's won't accept any change */
if (v4l2_ioctl (fd, VIDIOC_S_PARM, streamparm) < 0)
goto set_parm_failed;
/* get new values */
fps_d = streamparm->parm.capture.timeperframe.numerator;
fps_n = streamparm->parm.capture.timeperframe.denominator;
GST_INFO_OBJECT (v4l2object->element, "Set framerate to %u/%u", fps_n,
fps_d);
}
done: