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/*
Copyright (C) 2006 Mauro Carvalho Chehab <mchehab@infradead.org>
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
*/
#include <stddef.h>
#include <stdint.h>
#include <sys/time.h>
#include <linux/videodev2.h>
struct drv_list {
void *curr;
struct drv_list *next;
};
struct v4l2_t_buf {
void *start;
size_t length;
};
typedef int v4l2_recebe_buffer (struct v4l2_buffer *v4l2_buf, struct v4l2_t_buf *buf);
struct v4l2_driver {
int fd; /* Driver descriptor */
int debug;
/* V4L2 structs */
struct v4l2_capability cap;
struct v4l2_streamparm parm;
/* Several lists to be used to store enumbered values */
struct drv_list *stds,*inputs,*fmt_caps;
/* Stream control */
struct v4l2_requestbuffers reqbuf;
struct v4l2_buffer **v4l2_bufs;
struct v4l2_t_buf *bufs;
uint32_t sizeimage,n_bufs;
/* Queue control */
uint32_t waitq, currq;
};
enum v4l2_direction {
V4L2_GET = 1, // Bit 1
V4L2_SET = 2, // Bit 2
V4L2_SET_GET = 3, // Bits 1 and 2 - sets then gets and compare
V4L2_TRY = 4, // Bit 3
V4L2_TRY_SET = 6, // Bits 3 and 2 - try then sets
V4L2_TRY_SET_GET = 7, // Bits 3, 2 and 1- try, sets and gets
};
int v4l2_open (char *device, int debug, struct v4l2_driver *drv);
int v4l2_close (struct v4l2_driver *drv);
int v4l2_enum_stds (struct v4l2_driver *drv);
int v4l2_enum_input (struct v4l2_driver *drv);
int v4l2_enum_fmt (struct v4l2_driver *drv,enum v4l2_buf_type type);
int v4l2_get_parm (struct v4l2_driver *drv);
int v4l2_setget_std (struct v4l2_driver *drv, enum v4l2_direction dir, v4l2_std_id *id);
int v4l2_setget_input (struct v4l2_driver *drv, enum v4l2_direction dir, struct v4l2_input *input);
int v4l2_gettryset_fmt_cap (struct v4l2_driver *drv, enum v4l2_direction dir,
struct v4l2_format *fmt,uint32_t width, uint32_t height,
uint32_t pixelformat, enum v4l2_field field);
int v4l2_mmap_bufs(struct v4l2_driver *drv, unsigned int num_buffers);
int v4l2_free_bufs(struct v4l2_driver *drv);
int v4l2_start_streaming(struct v4l2_driver *drv);
int v4l2_stop_streaming(struct v4l2_driver *drv);
int v4l2_rcvbuf(struct v4l2_driver *drv, v4l2_recebe_buffer *v4l2_rec_buf);
int v4l2_getset_freq (struct v4l2_driver *drv, enum v4l2_direction dir,
double *freq);
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