// SPDX-License-Identifier: GPL-2.0-only
/*
* A virtual codec example device.
*
* Copyright 2018 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
*
* This is a virtual codec device driver for testing the codec framework.
* It simulates a device that uses memory buffers for both source and
* destination and encodes or decodes the data.
*/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/fs.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <media/v4l2-mem2mem.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-event.h>
#include <media/videobuf2-vmalloc.h>
#include "codec-v4l2-fwht.h"
MODULE_DESCRIPTION("Virtual codec device");
MODULE_AUTHOR("Hans Verkuil <hans.verkuil@cisco.com>");
MODULE_LICENSE("GPL v2");
static bool multiplanar;
module_param(multiplanar, bool, 0444);
MODULE_PARM_DESC(multiplanar,
" use multi-planar API instead of single-planar API");
static unsigned int debug;
module_param(debug, uint, 0644);
MODULE_PARM_DESC(debug, " activates debug info");
#define VICODEC_NAME "vicodec"
#define MAX_WIDTH 4096U
#define MIN_WIDTH 640U
#define MAX_HEIGHT 2160U
#define MIN_HEIGHT 360U
#define dprintk(dev, fmt, arg...) \
v4l2_dbg(1, debug, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg)
struct pixfmt_info {
u32 id;
unsigned int bytesperline_mult;
unsigned int sizeimage_mult;
unsigned int sizeimage_div;
unsigned int luma_step;
unsigned int chroma_step;
/* Chroma plane subsampling */
unsigned int width_div;
unsigned int height_div;
};
static const struct