diff options
Diffstat (limited to 'src/v4l2subdev.c')
| -rw-r--r-- | src/v4l2subdev.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/src/v4l2subdev.c b/src/v4l2subdev.c new file mode 100644 index 0000000..785209b --- /dev/null +++ b/src/v4l2subdev.c @@ -0,0 +1,188 @@ +/* + * Media controller test application + * + * Copyright (C) 2010 Ideas on board SPRL <laurent.pinchart@ideasonboard.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + */ + +#include <sys/ioctl.h> +#include <sys/stat.h> +#include <sys/types.h> + +#include <errno.h> +#include <fcntl.h> +#include <stdio.h> +#include <string.h> +#include <unistd.h> + +#include <linux/v4l2-subdev.h> + +#include "mediactl.h" +#include "v4l2subdev.h" +#include "tools.h" + +int v4l2_subdev_open(struct media_entity *entity) +{ + if (entity->fd != -1) + return 0; + + entity->fd = open(entity->devname, O_RDWR); + if (entity->fd == -1) { + printf("%s: Failed to open subdev device node %s\n", __func__, + entity->devname); + return -errno; + } + + return 0; +} + +void v4l2_subdev_close(struct media_entity *entity) +{ + close(entity->fd); + entity->fd = -1; +} + +int v4l2_subdev_get_format(struct media_entity *entity, + struct v4l2_mbus_framefmt *format, unsigned int pad, + enum v4l2_subdev_format_whence which) +{ + struct v4l2_subdev_format fmt; + int ret; + + ret = v4l2_subdev_open(entity); + if (ret < 0) + return ret; + + memset(&fmt, 0, sizeof(fmt)); + fmt.pad = pad; + fmt.which = which; + + ret = ioctl(entity->fd, VIDIOC_SUBDEV_G_FMT, &fmt); + if (ret < 0) + return -errno; + + *format = fmt.format; + return 0; +} + +int v4l2_subdev_set_format(struct media_entity *entity, + struct v4l2_mbus_framefmt *format, unsigned int pad, + enum v4l2_subdev_format_whence which) +{ + struct v4l2_subdev_format fmt; + int ret; + + ret = v4l2_subdev_open(entity); + if (ret < 0) + return ret; + + memset(&fmt, 0, sizeof(fmt)); + fmt.pad = pad; + fmt.which = which; + fmt.format = *format; + + ret = ioctl(entity->fd, VIDIOC_SUBDEV_S_FMT, &fmt); + if (ret < 0) + return -errno; + + *format = fmt.format; + return 0; +} + +int v4l2_subdev_get_crop(struct media_entity *entity, struct v4l2_rect *rect, + unsigned int pad, enum v4l2_subdev_format_whence which) +{ + struct v4l2_subdev_crop crop; + int ret; + + ret = v4l2_subdev_open(entity); + if (ret < 0) + return ret; + + memset(&crop, 0, sizeof(crop)); + crop.pad = pad; + crop.which = which; + + ret = ioctl(entity->fd, VIDIOC_SUBDEV_G_CROP, &crop); + if (ret < 0) + return -errno; + + *rect = crop.rect; + return 0; +} + +int v4l2_subdev_set_crop(struct media_entity *entity, struct v4l2_rect *rect, + unsigned int pad, enum v4l2_subdev_format_whence which) +{ + struct v4l2_subdev_crop crop; + int ret; + + ret = v4l2_subdev_open(entity); + if (ret < 0) + return ret; + + memset(&crop, 0, sizeof(crop)); + crop.pad = pad; + crop.which = which; + crop.rect = *rect; + + ret = ioctl(entity->fd, VIDIOC_SUBDEV_S_CROP, &crop); + if (ret < 0) + return -errno; + + *rect = crop.rect; + return 0; +} + +int v4l2_subdev_get_frame_interval(struct media_entity *entity, + struct v4l2_fract *interval) +{ + struct v4l2_subdev_frame_interval ival; + int ret; + + ret = v4l2_subdev_open(entity); + if (ret < 0) + return ret; + + memset(&ival, 0, sizeof(ival)); + + ret = ioctl(entity->fd, VIDIOC_SUBDEV_G_FRAME_INTERVAL, &ival); + if (ret < 0) + return -errno; + + *interval = ival.interval; + return 0; +} + +int v4l2_subdev_set_frame_interval(struct media_entity *entity, + struct v4l2_fract *interval) +{ + struct v4l2_subdev_frame_interval ival; + int ret; + + ret = v4l2_subdev_open(entity); + if (ret < 0) + return ret; + + memset(&ival, 0, sizeof(ival)); + ival.interval = *interval; + + ret = ioctl(entity->fd, VIDIOC_SUBDEV_S_FRAME_INTERVAL, &ival); + if (ret < 0) + return -errno; + + *interval = ival.interval; + return 0; +} |