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/*
# (C) 2008 Hans de Goede <hdegoede@redhat.com>
# This program 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.
#
# This program 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.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA
*/
#ifndef __LIBV4L2_PRIV_H
#define __LIBV4L2_PRIV_H
#include <stdio.h>
#include <pthread.h>
#include <libv4lconvert.h> /* includes videodev2.h for us */
#include "../libv4lconvert/libv4lsyscall-priv.h"
#define V4L2_MAX_DEVICES 16
/* Warning when making this larger the frame_queued and frame_mapped members of
the v4l2_dev_info struct can no longer be a bitfield, so the code needs to
be adjusted! */
#define V4L2_MAX_NO_FRAMES 32
#define V4L2_DEFAULT_NREADBUFFERS 4
#define V4L2_IGNORE_FIRST_FRAME_ERRORS 3
#define V4L2_DEFAULT_FPS 30
#define V4L2_LOG_ERR(...) \
do { \
if (v4l2_log_file) { \
fprintf(v4l2_log_file, "libv4l2: error " __VA_ARGS__); \
fflush(v4l2_log_file); \
} else \
fprintf(stderr, "libv4l2: error " __VA_ARGS__); \
} while (0)
#define V4L2_PERROR(format, ...) \
do { \
if (errno == ENODEV) { \
devices[index].gone = 1;\
break; \
} \
V4L2_LOG_ERR(format ": %s\n", ##__VA_ARGS__, strerror(errno)); \
} while (0)
#define V4L2_LOG_WARN(...) \
do { \
if (v4l2_log_file) { \
fprintf(v4l2_log_file, "libv4l2: warning " __VA_ARGS__); \
fflush(v4l2_log_file); \
} else \
fprintf(stderr, "libv4l2: warning " __VA_ARGS__); \
} while (0)
#define V4L2_LOG(...) \
do { \
if (v4l2_log_file) { \
fprintf(v4l2_log_file, "libv4l2: " __VA_ARGS__); \
fflush(v4l2_log_file); \
} \
} while (0)
#define MIN(a, b) (((a) < (b)) ? (a) : (b))
struct v4l2_dev_info {
int fd;
int flags;
int open_count;
int gone; /* Set to 1 when a device is detached (ENODEV encountered) */
long page_size;
/* actual format of the cam */
struct v4l2_format src_fmt;
/* fmt as seen by the application (iow after conversion) */
struct v4l2_format dest_fmt;
pthread_mutex_t stream_lock;
unsigned int no_frames;
unsigned int nreadbuffers;
int fps;
int first_frame;
struct v4lconvert_data *convert;
unsigned char *convert_mmap_buf;
size_t convert_mmap_buf_size;
size_t convert_mmap_frame_size;
/* Frame bookkeeping is only done when in read or mmap-conversion mode */
unsigned char *frame_pointers[V4L2_MAX_NO_FRAMES];
int frame_sizes[V4L2_MAX_NO_FRAMES];
int frame_queued; /* 1 status bit per frame */
int frame_info_generation;
/* mapping tracking of our fake (converting mmap) frame buffers */
unsigned char frame_map_count[V4L2_MAX_NO_FRAMES];
/* buffer when doing conversion and using read() for read() */
int readbuf_size;
unsigned char *readbuf;
/* plugin info */
void *plugin_library;
void *dev_ops_priv;
const struct libv4l_dev_ops *dev_ops;
};
/* From v4l2-plugin.c */
#if defined(HAVE_V4L_PLUGINS)
void v4l2_plugin_init(int fd, void **plugin_lib_ret, void **plugin_priv_ret,
const struct libv4l_dev_ops **dev_ops_ret);
void v4l2_plugin_cleanup(void *plugin_lib, void *plugin_priv,
const struct libv4l_dev_ops *dev_ops);
#else
static inline void v4l2_plugin_init(int fd, void **plugin_lib_ret, void **plugin_priv_ret,
const struct libv4l_dev_ops **dev_ops_ret)
{
*dev_ops_ret = v4lconvert_get_default_dev_ops();
*plugin_lib_ret = NULL;
*plugin_priv_ret = NULL;
}
static inline void v4l2_plugin_cleanup(void *plugin_lib, void *plugin_priv,
const struct libv4l_dev_ops *dev_ops)
{
}
#endif /* WITH_V4L_PLUGINS */
/* From log.c */
extern const char *v4l2_ioctls[];
void v4l2_log_ioctl(unsigned long int request, void *arg, int result);
#endif
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