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refactoring

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This commit is contained in:
Devaev Maxim
2019-05-30 06:53:01 +03:00
parent 9ca43f17a3
commit 3f03575222
5 changed files with 131 additions and 92 deletions
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34
src/device.c
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@@ -30,6 +30,7 @@
#include <errno.h>
#include <assert.h>
#include <sys/select.h>
#include <sys/mman.h>
#include <linux/videodev2.h>
@@ -232,6 +233,39 @@ int device_switch_capturing(struct device_t *dev, bool enable) {
return 0;
}
int device_select(struct device_t *dev, bool *has_read, bool *has_write, bool *has_error) {
struct timeval timeout;
int retval;
# define INIT_FD_SET(_set) \
fd_set _set; FD_ZERO(&_set); FD_SET(dev->run->fd, &_set);
INIT_FD_SET(read_fds);
INIT_FD_SET(write_fds);
INIT_FD_SET(error_fds);
# undef INIT_FD_SET
timeout.tv_sec = dev->timeout;
timeout.tv_usec = 0;
LOG_DEBUG("Calling select() on video device ...");
retval = select(dev->run->fd + 1, &read_fds, &write_fds, &error_fds, &timeout);
if (retval > 0) {
*has_read = FD_ISSET(dev->run->fd, &read_fds);
*has_write = FD_ISSET(dev->run->fd, &write_fds);
*has_error = FD_ISSET(dev->run->fd, &error_fds);
} else {
has_read = false;
has_write = false;
has_error = false;
}
LOG_DEBUG("Device select() --> %d", retval);
return retval;
}
int device_grab_buffer(struct device_t *dev) {
struct v4l2_buffer buf_info;