48 lines
1.5 KiB
C
48 lines
1.5 KiB
C
#pragma once
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#include <stdlib.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <string.h>
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#include <math.h>
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#include <fcntl.h>
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#include <poll.h>
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#include <errno.h>
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#include <assert.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <pthread.h>
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#include <sys/ioctl.h>
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#include <sys/mman.h>
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#include <linux/videodev2.h>
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#ifndef CFG_XIOCTL_RETRIES
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# define CFG_XIOCTL_RETRIES 4
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#endif
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#define XIOCTL_RETRIES ((unsigned)(CFG_XIOCTL_RETRIES))
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// assumes that name is first item
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#define dev_name(dev) (dev ? *(const char**)dev : "?")
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#define E_LOG_ERROR(dev, _msg, ...) do { fprintf(stderr, "%s: " _msg "\n", dev_name(dev), ##__VA_ARGS__); goto error; } while(0)
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#define E_LOG_PERROR(dev, _msg, ...) do { fprintf(stderr, "%s: " _msg "\n", dev_name(dev), ##__VA_ARGS__); exit(-1); } while(0)
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#define E_LOG_INFO(dev, _msg, ...) fprintf(stderr, "%s: " _msg "\n", dev_name(dev), ##__VA_ARGS__)
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#define E_LOG_VERBOSE(dev, _msg, ...) fprintf(stderr, "%s: " _msg "\n", dev_name(dev), ##__VA_ARGS__)
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#define E_LOG_DEBUG(dev, _msg, ...) fprintf(stderr, "%s: " _msg "\n", dev_name(dev), ##__VA_ARGS__)
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typedef struct {
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char buf[10];
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} fourcc_string;
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fourcc_string fourcc_to_string(unsigned format);
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unsigned fourcc_to_stride(unsigned width, unsigned format);
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int xioctl(const char *name, int fd, int request, void *arg);
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#define E_XIOCTL(dev, _fd, _request, _value, _msg, ...) do { \
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int ret; \
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if ((ret = xioctl(dev_name(dev), _fd, _request, _value)) < 0) { \
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E_LOG_ERROR(dev, "xioctl(ret=%d): " _msg, ret, ##__VA_ARGS__); \
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} \
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} while(0)
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