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/* hacktv - Analogue video transmitter for the HackRF */
/*=======================================================================*/
/* Copyright 2019 Philip Heron <phil@sanslogic.co.uk> */
/* */
/* 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 3 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, see <http://www.gnu.org/licenses/>. */
#ifndef _VIDEOCRYPTS_H
#define _VIDEOCRYPTS_H
#include <stdint.h>
#include "video.h"
#define VCS_SAMPLE_RATE 17734475
#define VCS_WIDTH 1135
#define VCS_VBI_LEFT 211
#define VCS_VBI_FIELD_1_START 24
#define VCS_VBI_FIELD_2_START 336
#define VCS_VBI_LINES_PER_FIELD 4
#define VCS_VBI_LINES_PER_FRAME (VCS_VBI_LINES_PER_FIELD * 2)
#define VCS_VBI_SAMPLES_PER_BIT 22
#define VCS_VBI_BITS_PER_LINE 40
#define VCS_VBI_BYTES_PER_LINE (VCS_VBI_BITS_PER_LINE / 8)
#define VCS_PACKET_LENGTH 32
/* This is not correct - just a placeholder */
#define VCS_PRBS_CW_FA (((uint64_t) 1 << 60) - 1)
/* VCS_DELAY_LINES needs to be long enough for the scrambler to access any
* line in the next block, which may be in the next field... */
#define VCS_DELAY_LINES 125
typedef struct {
uint8_t mode;
uint8_t channel;
uint64_t codeword;
uint8_t messages[8][32];
} _vcs_block_t;
typedef struct {
uint8_t counter;
/* VCS blocks */
const _vcs_block_t *blocks;
size_t block_num;
size_t block_len;
uint8_t message[32];
uint8_t vbi[VCS_VBI_BYTES_PER_LINE * VCS_VBI_LINES_PER_FRAME];
int block[47];
int video_scale[VCS_WIDTH];
} vcs_t;
extern int vcs_init(vcs_t *s, vid_t *vs, const char *mode);
extern void vcs_free(vcs_t *s);
extern int vcs_render_line(vid_t *s, void *arg, int nlines, vid_line_t **lines);
#endif
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