linux/drivers/media/pci/ivtv/ivtv-vbi.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
    Vertical Blank Interval support functions
    Copyright (C) 2004-2007  Hans Verkuil <[email protected]>

 */

#include "ivtv-driver.h"
#include "ivtv-i2c.h"
#include "ivtv-ioctl.h"
#include "ivtv-queue.h"
#include "ivtv-cards.h"
#include "ivtv-vbi.h"

static void ivtv_set_vps(struct ivtv *itv, int enabled)
{ … }

static void ivtv_set_cc(struct ivtv *itv, int mode, const struct vbi_cc *cc)
{ … }

static void ivtv_set_wss(struct ivtv *itv, int enabled, int mode)
{ … }

static int odd_parity(u8 c)
{ … }

static void ivtv_write_vbi_line(struct ivtv *itv,
				const struct v4l2_sliced_vbi_data *d,
				struct vbi_cc *cc, int *found_cc)
{ … }

static void ivtv_write_vbi_cc_lines(struct ivtv *itv, const struct vbi_cc *cc)
{ … }

static void ivtv_write_vbi(struct ivtv *itv,
			   const struct v4l2_sliced_vbi_data *sliced,
			   size_t cnt)
{ … }

ssize_t
ivtv_write_vbi_from_user(struct ivtv *itv,
			 const struct v4l2_sliced_vbi_data __user *sliced,
			 size_t cnt)
{ … }

static void copy_vbi_data(struct ivtv *itv, int lines, u32 pts_stamp)
{ … }

static int ivtv_convert_ivtv_vbi(struct ivtv *itv, u8 *p)
{ … }

/* Compress raw VBI format, removes leading SAV codes and surplus space after the
   field.
   Returns new compressed size. */
static u32 compress_raw_buf(struct ivtv *itv, u8 *buf, u32 size)
{ … }


/* Compressed VBI format, all found sliced blocks put next to one another
   Returns new compressed size */
static u32 compress_sliced_buf(struct ivtv *itv, u32 line, u8 *buf, u32 size, u8 sav)
{ … }

void ivtv_process_vbi_data(struct ivtv *itv, struct ivtv_buffer *buf,
			   u64 pts_stamp, int streamtype)
{ … }

void ivtv_disable_cc(struct ivtv *itv)
{ … }


void ivtv_vbi_work_handler(struct ivtv *itv)
{ … }