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/*
* 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 "media.h"
#include "subdev.h"
#include "tools.h"
static struct {
const char *name;
enum v4l2_mbus_pixelcode code;
} mbus_formats[] = {
{ "YUYV", V4L2_MBUS_FMT_YUYV16_1X16 },
{ "UYVY", V4L2_MBUS_FMT_UYVY16_1X16 },
{ "SGRBG10", V4L2_MBUS_FMT_SGRBG10_1X10 },
{ "SGRBG10_DPCM8", V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8 },
};
const char *pixelcode_to_string(enum v4l2_mbus_pixelcode code)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(mbus_formats); ++i) {
if (mbus_formats[i].code == code)
return mbus_formats[i].name;
}
return "unknown";
}
enum v4l2_mbus_pixelcode string_to_pixelcode(const char *string,
unsigned int length)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(mbus_formats); ++i) {
if (strncmp(mbus_formats[i].name, string, length) == 0)
break;
}
if (i == ARRAY_SIZE(mbus_formats))
return (enum v4l2_mbus_pixelcode)-1;
return mbus_formats[i].code;
}
static 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;
}
int v4l2_subdev_get_format(struct media_entity *entity,
struct v4l2_mbus_framefmt *format, unsigned int pad,
enum v4l2_subdev_format which)
{
struct v4l2_subdev_pad_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 which)
{
struct v4l2_subdev_pad_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;
}
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