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V4L/DVB (13618): v4l2: Adding helper function to get dv preset description

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This patch adds a helper function to get description of a digital
video preset added by the video timing API. This will be useful for drivers
implementing the above API.

Signed-off-by: Muralidharan Karicheri <m-karicheri2@ti.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Muralidharan Karicheri 2009-12-10 04:39:47 -03:00 committed by Mauro Carvalho Chehab
parent 579e7d60ba
commit 2e535ed5a1
2 changed files with 48 additions and 1 deletions
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47
drivers/media/video/v4l2-common.c
View file

@ -1024,3 +1024,50 @@ void v4l_bound_align_image(u32 *w, unsigned int wmin, unsigned int wmax,
}
}
EXPORT_SYMBOL_GPL(v4l_bound_align_image);
/**
* v4l_fill_dv_preset_info - fill description of a digital video preset
* @preset - preset value
* @info - pointer to struct v4l2_dv_enum_preset
*
* drivers can use this helper function to fill description of dv preset
* in info.
*/
int v4l_fill_dv_preset_info(u32 preset, struct v4l2_dv_enum_preset *info)
{
static const struct v4l2_dv_preset_info {
u16 width;
u16 height;
const char *name;
} dv_presets[] = {
{ 0, 0, "Invalid" }, /* V4L2_DV_INVALID */
{ 720, 480, "480p@59.94" }, /* V4L2_DV_480P59_94 */
{ 720, 576, "576p@50" }, /* V4L2_DV_576P50 */
{ 1280, 720, "720p@24" }, /* V4L2_DV_720P24 */
{ 1280, 720, "720p@25" }, /* V4L2_DV_720P25 */
{ 1280, 720, "720p@30" }, /* V4L2_DV_720P30 */
{ 1280, 720, "720p@50" }, /* V4L2_DV_720P50 */
{ 1280, 720, "720p@59.94" }, /* V4L2_DV_720P59_94 */
{ 1280, 720, "720p@60" }, /* V4L2_DV_720P60 */
{ 1920, 1080, "1080i@29.97" }, /* V4L2_DV_1080I29_97 */
{ 1920, 1080, "1080i@30" }, /* V4L2_DV_1080I30 */
{ 1920, 1080, "1080i@25" }, /* V4L2_DV_1080I25 */
{ 1920, 1080, "1080i@50" }, /* V4L2_DV_1080I50 */
{ 1920, 1080, "1080i@60" }, /* V4L2_DV_1080I60 */
{ 1920, 1080, "1080p@24" }, /* V4L2_DV_1080P24 */
{ 1920, 1080, "1080p@25" }, /* V4L2_DV_1080P25 */
{ 1920, 1080, "1080p@30" }, /* V4L2_DV_1080P30 */
{ 1920, 1080, "1080p@50" }, /* V4L2_DV_1080P50 */
{ 1920, 1080, "1080p@60" }, /* V4L2_DV_1080P60 */
};
if (info == NULL || preset >= ARRAY_SIZE(dv_presets))
return -EINVAL;
info->preset = preset;
info->width = dv_presets[preset].width;
info->height = dv_presets[preset].height;
strlcpy(info->name, dv_presets[preset].name, sizeof(info->name));
return 0;
}
EXPORT_SYMBOL_GPL(v4l_fill_dv_preset_info);

2
include/media/v4l2-common.h
View file

@ -212,5 +212,5 @@ void v4l_bound_align_image(unsigned int *w, unsigned int wmin,
unsigned int *h, unsigned int hmin,
unsigned int hmax, unsigned int halign,
unsigned int salign);
int v4l_fill_dv_preset_info(u32 preset, struct v4l2_dv_enum_preset *info);
#endif /* V4L2_COMMON_H_ */