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supported hw fps

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This commit is contained in:
Devaev Maxim
2019-03-23 03:49:59 +03:00
parent fc4cbb1fe1
commit 2e96d74ac0
1 changed files with 41 additions and 1 deletions
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42
src/device.c
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@@ -65,6 +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_apply_dv_timings(struct device_t *dev);
static int _device_open_format(struct device_t *dev);
static void _device_open_hw_fps(struct device_t *dev);
static int _device_open_mmap(struct device_t *dev);
static int _device_open_queue_buffers(struct device_t *dev);
static void _device_open_alloc_picbufs(struct device_t *dev);
@@ -144,6 +145,7 @@ int device_open(struct device_t *dev) {
if (_device_open_format(dev) < 0) {
goto error;
}
_device_open_hw_fps(dev);
if (_device_open_mmap(dev) < 0) {
goto error;
}
@@ -285,7 +287,7 @@ static int _device_open_check_cap(struct device_t *dev) {
}
if (!(cap.capabilities & V4L2_CAP_VIDEO_CAPTURE)) {
LOG_ERROR("Video capture not supported by our device");
LOG_ERROR("Video capture not supported by the device");
return -1;
}
@@ -422,6 +424,44 @@ static int _device_open_format(struct device_t *dev) {
return 0;
}
static void _device_open_hw_fps(struct device_t *dev) {
struct v4l2_streamparm setfps;
MEMSET_ZERO(setfps);
setfps.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
LOG_DEBUG("Calling ioctl(VIDIOC_G_PARM) ...");
if (xioctl(dev->run->fd, VIDIOC_G_PARM, &setfps) < 0) {
LOG_PERROR("Unable to query that the HW FPS change is not supported");
return;
}
if (!(setfps.parm.capture.capability & V4L2_CAP_TIMEPERFRAME)) {
LOG_INFO("Changing HW FPS is not supported");
return;
}
# define SETFPS_TPF(_next) setfps.parm.capture.timeperframe._next
MEMSET_ZERO(setfps);
setfps.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
SETFPS_TPF(numerator) = 1;
SETFPS_TPF(denominator) = (dev->desired_fps == 0 ? 255 : dev->desired_fps);
if (xioctl(dev->run->fd, VIDIOC_S_PARM, &setfps) < 0) {
LOG_PERROR("Unable to set HW FPS");
return;
}
if (dev->desired_fps != SETFPS_TPF(denominator)) {
LOG_INFO("Using HW FPS (coerced): %u -> %u", dev->desired_fps, SETFPS_TPF(denominator));
} else {
LOG_INFO("Using HW FPS: %u", dev->desired_fps);
}
# undef SETFPS_TPF
}
static int _device_open_mmap(struct device_t *dev) {
struct v4l2_requestbuffers req;