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show query result of image settings

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This commit is contained in:
Devaev Maxim
2019-03-05 12:43:13 +03:00
parent 69d6fda56b
commit 388198a504
1 changed files with 17 additions and 6 deletions
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23
src/device.c
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@@ -65,7 +65,7 @@ static int _device_open_check_cap(struct device_t *dev);
static int _device_open_dv_timings(struct device_t *dev); static int _device_open_dv_timings(struct device_t *dev);
static int _device_apply_dv_timings(struct device_t *dev); static int _device_apply_dv_timings(struct device_t *dev);
static int _device_open_format(struct device_t *dev); static int _device_open_format(struct device_t *dev);
static void _device_open_set_image_settings(struct device_t *dev); static void _device_apply_image_settings(struct device_t *dev);
static void _device_open_alloc_picbufs(struct device_t *dev); static void _device_open_alloc_picbufs(struct device_t *dev);
static int _device_open_mmap(struct device_t *dev); static int _device_open_mmap(struct device_t *dev);
static int _device_open_queue_buffers(struct device_t *dev); static int _device_open_queue_buffers(struct device_t *dev);
@@ -142,7 +142,7 @@ int device_open(struct device_t *dev) {
if (_device_open_format(dev) < 0) { if (_device_open_format(dev) < 0) {
goto error; goto error;
} }
_device_open_set_image_settings(dev); _device_apply_image_settings(dev);
if (_device_open_mmap(dev) < 0) { if (_device_open_mmap(dev) < 0) {
goto error; goto error;
} }
@@ -357,18 +357,29 @@ static int _device_open_format(struct device_t *dev) {
return 0; return 0;
} }
static void _device_open_set_image_settings(struct device_t *dev) { static void _device_apply_image_settings(struct device_t *dev) {
struct v4l2_queryctrl query; struct v4l2_queryctrl query;
struct v4l2_control ctl; struct v4l2_control ctl;
// https://www.linuxtv.org/downloads/v4l-dvb-apis-old/vidioc-queryctrl.html#v4l2-queryctrl
# define SET_CID(_cid, _dest) { \ # define SET_CID(_cid, _dest) { \
MEMSET_ZERO(query); query.id = _cid; \ MEMSET_ZERO(query); query.id = _cid; \
if (xioctl(dev->run->fd, VIDIOC_QUERYCTRL, &query) != 0) { \ if (xioctl(dev->run->fd, VIDIOC_QUERYCTRL, &query) < 0 || query.flags & V4L2_CTRL_FLAG_DISABLED) { \
LOG_INFO("Changing image " #_dest " is unsupported"); \ LOG_INFO("Changing image " #_dest " is unsupported"); \
} else { \ } else { \
MEMSET_ZERO(ctl); ctl.id = _cid; ctl.value = (int)dev->img->_dest; \ MEMSET_ZERO(ctl); ctl.id = _cid; ctl.value = (int)dev->img->_dest; \
if (xioctl(dev->run->fd, VIDIOC_S_CTRL, &ctl) < 0) { LOG_PERROR("Can't set image " #_dest); } \ if (ctl.value < query.minimum || ctl.value > query.maximum || ctl.value % query.step != 0) { \
else { LOG_INFO("Using image " #_dest ": %d", ctl.value); } \ LOG_ERROR("Invalid value %d for image " #_dest ": min=%d, max=%d, default=%d, step=%u", \
ctl.value, query.minimum, query.maximum, query.default_value, query.step); \
} else { \
if (xioctl(dev->run->fd, VIDIOC_S_CTRL, &ctl) < 0) { \
LOG_PERROR("Can't set image " #_dest); \
} else { \
LOG_INFO("Using image " #_dest ": %d (min=%d, max=%d, default=%d, step=%u)", \
ctl.value, query.minimum, query.maximum, query.default_value, query.step); \
} \
} \
} \ } \
} }