linux/drivers/media/test-drivers/vimc/vimc-scaler.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * vimc-scaler.c Virtual Media Controller Driver
 *
 * Copyright (C) 2015-2017 Helen Koike <[email protected]>
 */

#include <linux/moduleparam.h>
#include <linux/string.h>
#include <linux/vmalloc.h>
#include <linux/v4l2-mediabus.h>
#include <media/v4l2-rect.h>
#include <media/v4l2-subdev.h>

#include "vimc-common.h"

/* Pad identifier */
enum vimc_scaler_pad { … };

#define VIMC_SCALER_FMT_WIDTH_DEFAULT …
#define VIMC_SCALER_FMT_HEIGHT_DEFAULT …

struct vimc_scaler_device { … };

static const struct v4l2_mbus_framefmt fmt_default = …;

static const struct v4l2_rect crop_rect_default = …;

static const struct v4l2_rect crop_rect_min = …;

static struct v4l2_rect
vimc_scaler_get_crop_bound_sink(const struct v4l2_mbus_framefmt *sink_fmt)
{ … }

static int vimc_scaler_init_state(struct v4l2_subdev *sd,
				  struct v4l2_subdev_state *sd_state)
{ … }

static int vimc_scaler_enum_mbus_code(struct v4l2_subdev *sd,
				   struct v4l2_subdev_state *sd_state,
				   struct v4l2_subdev_mbus_code_enum *code)
{ … }

static int vimc_scaler_enum_frame_size(struct v4l2_subdev *sd,
				    struct v4l2_subdev_state *sd_state,
				    struct v4l2_subdev_frame_size_enum *fse)
{ … }

static int vimc_scaler_set_fmt(struct v4l2_subdev *sd,
			    struct v4l2_subdev_state *sd_state,
			    struct v4l2_subdev_format *format)
{ … }

static int vimc_scaler_get_selection(struct v4l2_subdev *sd,
				  struct v4l2_subdev_state *sd_state,
				  struct v4l2_subdev_selection *sel)
{ … }

static void vimc_scaler_adjust_sink_crop(struct v4l2_rect *r,
				      const struct v4l2_mbus_framefmt *sink_fmt)
{ … }

static int vimc_scaler_set_selection(struct v4l2_subdev *sd,
				  struct v4l2_subdev_state *sd_state,
				  struct v4l2_subdev_selection *sel)
{ … }

static const struct v4l2_subdev_pad_ops vimc_scaler_pad_ops = …;

static int vimc_scaler_s_stream(struct v4l2_subdev *sd, int enable)
{ … }

static const struct v4l2_subdev_video_ops vimc_scaler_video_ops = …;

static const struct v4l2_subdev_ops vimc_scaler_ops = …;

static const struct v4l2_subdev_internal_ops vimc_scaler_internal_ops = …;

static void vimc_scaler_fill_src_frame(const struct vimc_scaler_device *const vscaler,
				    const u8 *const sink_frame)
{ … }

static void *vimc_scaler_process_frame(struct vimc_ent_device *ved,
				    const void *sink_frame)
{
	struct vimc_scaler_device *vscaler = container_of(ved, struct vimc_scaler_device,
						    ved);

	/* If the stream in this node is not active, just return */
	if (!vscaler->src_frame)
		return ERR_PTR(-EINVAL);

	vimc_scaler_fill_src_frame(vscaler, sink_frame);

	return vscaler->src_frame;
};

static void vimc_scaler_release(struct vimc_ent_device *ved)
{ … }

static struct vimc_ent_device *vimc_scaler_add(struct vimc_device *vimc,
					    const char *vcfg_name)
{ … }

const struct vimc_ent_type vimc_scaler_type = …;