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author | Trent Piepho <xyzzy@speakeasy.org> | 2009-03-04 01:21:02 -0300 |
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committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-03-30 12:43:05 -0300 |
commit | 51f0b8d57af501624ee55e8ca15d09d5bdc2b0dd (patch) | |
tree | 095d574cc559f813ca7d2da2642b7431b661f4bb /drivers/media/video/v4l2-ioctl.c | |
parent | 337f9d205972bfe1cb7982384fd0f4caa4af001d (diff) | |
download | linux-stable-51f0b8d57af501624ee55e8ca15d09d5bdc2b0dd.tar.gz linux-stable-51f0b8d57af501624ee55e8ca15d09d5bdc2b0dd.tar.bz2 linux-stable-51f0b8d57af501624ee55e8ca15d09d5bdc2b0dd.zip |
V4L/DVB (10813): v4l2: New function v4l2_video_std_frame_period
Some code was calling v4l2_video_std_construct() when all it cared about
was the frame period. So make a function that just returns that and have
v4l2_video_std_construct() use it.
At this point there are no users of v4l2_video_std_construct() left outside
of v4l2-ioctl, so it could be un-exported and made static.
Change v4l2_video_std_construct() so that it doesn't zero out the struct
v4l2_standard passed in. It's already been zeroed out in the common ioctl
code.
Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/v4l2-ioctl.c')
-rw-r--r-- | drivers/media/video/v4l2-ioctl.c | 39 |
1 files changed, 18 insertions, 21 deletions
diff --git a/drivers/media/video/v4l2-ioctl.c b/drivers/media/video/v4l2-ioctl.c index 64b4fda08dd5..efbc47004657 100644 --- a/drivers/media/video/v4l2-ioctl.c +++ b/drivers/media/video/v4l2-ioctl.c @@ -101,25 +101,27 @@ const char *v4l2_norm_to_name(v4l2_std_id id) } EXPORT_SYMBOL(v4l2_norm_to_name); +/* Returns frame period for the given standard */ +void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod) +{ + if (id & V4L2_STD_525_60) { + frameperiod->numerator = 1001; + frameperiod->denominator = 30000; + } else { + frameperiod->numerator = 1; + frameperiod->denominator = 25; + } +} +EXPORT_SYMBOL(v4l2_video_std_frame_period); + /* Fill in the fields of a v4l2_standard structure according to the 'id' and 'transmission' parameters. Returns negative on error. */ int v4l2_video_std_construct(struct v4l2_standard *vs, int id, const char *name) { - u32 index = vs->index; - - memset(vs, 0, sizeof(struct v4l2_standard)); - vs->index = index; - vs->id = id; - if (id & V4L2_STD_525_60) { - vs->frameperiod.numerator = 1001; - vs->frameperiod.denominator = 30000; - vs->framelines = 525; - } else { - vs->frameperiod.numerator = 1; - vs->frameperiod.denominator = 25; - vs->framelines = 625; - } + vs->id = id; + v4l2_video_std_frame_period(id, &vs->frameperiod); + vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625; strlcpy(vs->name, name, sizeof(vs->name)); return 0; } @@ -1076,7 +1078,6 @@ static long __video_do_ioctl(struct file *file, return -EINVAL; v4l2_video_std_construct(p, curr_id, descr); - p->index = index; dbgarg(cmd, "index=%d, id=0x%Lx, name=%s, fps=%d/%d, " "framelines=%d\n", p->index, @@ -1565,15 +1566,11 @@ static long __video_do_ioctl(struct file *file, if (ops->vidioc_g_parm) { ret = ops->vidioc_g_parm(file, fh, p); } else { - struct v4l2_standard s; - if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) return -EINVAL; - v4l2_video_std_construct(&s, vfd->current_norm, - v4l2_norm_to_name(vfd->current_norm)); - - p->parm.capture.timeperframe = s.frameperiod; + v4l2_video_std_frame_period(vfd->current_norm, + &p->parm.capture.timeperframe); ret = 0; } |