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Optimise usage of videodev2.h header

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This commit is contained in:
Kamil Trzcinski
2022-04-10 14:41:00 +02:00
parent b21ddd2519
commit cae3087116
32 changed files with 131 additions and 158 deletions
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77
device/v4l2/v4l2.c
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@ -1,59 +1,26 @@
#include "device/v4l2/v4l2.h"
#include "v4l2.h"
#include "device/device.h"
#include <linux/videodev2.h>
#include <linux/v4l2-subdev.h>
device_hw_t v4l2_device_hw = {
.device_open = v4l2_device_open,
.device_close = v4l2_device_close,
.device_set_decoder_start = v4l2_device_set_decoder_start,
.device_video_force_key = v4l2_device_video_force_key,
.device_set_fps = v4l2_device_set_fps,
.device_set_option = v4l2_device_set_option,
int xioctl(const char *name, int fd, int request, void *arg)
.buffer_open = v4l2_buffer_open,
.buffer_close = v4l2_buffer_close,
.buffer_enqueue = v4l2_buffer_enqueue,
.buffer_list_dequeue = v4l2_buffer_list_dequeue,
.buffer_list_pollfd = v4l2_buffer_list_pollfd,
.buffer_list_set_format = v4l2_buffer_list_set_format,
.buffer_list_set_buffers = v4l2_buffer_list_set_buffers,
.buffer_list_set_stream = v4l2_buffer_list_set_stream
};
device_t *device_v4l2_open(const char *name, const char *path)
{
int retries = XIOCTL_RETRIES;
int retval = -1;
do {
retval = ioctl(fd, request, arg);
} while (
retval
&& retries--
&& (
errno == EINTR
|| errno == EAGAIN
|| errno == ETIMEDOUT
)
);
// cppcheck-suppress knownConditionTrueFalse
if (retval && retries <= 0) {
E_LOG_PERROR(NULL, "%s: ioctl(%08x) retried %u times; giving up", name, request, XIOCTL_RETRIES);
}
return retval;
}
static size_t align_size(size_t size, size_t to)
{
return ((size + (to - 1)) & ~(to - 1));
}
unsigned fourcc_to_stride(unsigned width, unsigned format)
{
switch (format) {
case V4L2_PIX_FMT_YUYV:
case V4L2_PIX_FMT_UYVY:
case V4L2_PIX_FMT_RGB565:
return align_size(width * 2, 32);
case V4L2_PIX_FMT_YUV420:
return align_size(width * 3 / 2, 32);
case V4L2_PIX_FMT_RGB24:
return align_size(width * 3, 32);
case V4L2_PIX_FMT_SRGGB10P:
return align_size(width * 5 / 4, 32);
case V4L2_PIX_FMT_JPEG:
case V4L2_PIX_FMT_H264:
return 0;
default:
E_LOG_PERROR(NULL, "Unknown format: %s", fourcc_to_string(format).buf);
}
return device_open(name, path, &v4l2_device_hw);
}