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linux-v4l2: Add helper function to set dv timing

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Add a helper function to set the dv timing for the input.
This commit is contained in:
fryshorts 2015-02-24 22:18:24 +01:00
parent bcf8400137
commit 99b6a018cc
2 changed files with 30 additions and 0 deletions
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19
plugins/linux-v4l2/v4l2-helpers.c
View File

@ -254,3 +254,22 @@ int_fast32_t v4l2_enum_dv_timing(int_fast32_t dev, struct v4l2_dv_timings *dvt,
return 0;
}
int_fast32_t v4l2_set_dv_timing(int_fast32_t dev, int *timing)
{
if (!dev || !timing)
return -1;
if (*timing == -1)
return 0;
struct v4l2_dv_timings dvt;
if (v4l2_enum_dv_timing(dev, &dvt, *timing) < 0)
return -1;
if (v4l2_ioctl(dev, VIDIOC_S_DV_TIMINGS, &dvt) < 0)
return -1;
return 0;
}

11
plugins/linux-v4l2/v4l2-helpers.h
View File

@ -281,6 +281,17 @@ int_fast32_t v4l2_set_standard(int_fast32_t dev, int *standard);
*/
int_fast32_t v4l2_enum_dv_timing(int_fast32_t dev, struct v4l2_dv_timings *dvt,
int index);
/**
* Set a dv timing on the device
*
* Currently standard will not be changed on success or error.
*
* @param dev handle to the v4l2 device
* @param timing index of the timing to use or -1 to leave as is
*
* @return negative on failure
*/
int_fast32_t v4l2_set_dv_timing(int_fast32_t dev, int *timing);
#ifdef __cplusplus
}