vbi.h

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#ifndef VBI_H
#define VBI_H
 
#include "vt.h"
#include "dllist.h"
#include "lang.h"
//#include "cache.h"
 
static constexpr int8_t PLL_ADJUST { 4 };
 
struct raw_page
{
    struct vt_page page[1];
    struct enhance enh[1];
};
 
struct vbi
{
    int fd;
    struct cache *cache;
    struct dl_head clients[1];
    // raw buffer management
    int bufsize;               // nr of bytes sent by this device
    int bpl;                   // bytes per line
    unsigned int seq;
    // page assembly
    struct raw_page rpage[8];  // one for each magazin
    struct raw_page *ppage;    // points to page of previous pkt0
    // phase correction
    int pll_fixed;             // 0 = auto, 1..2*PLL_ADJUST+1 = fixed
    int pll_adj;
    int pll_dir;
    int pll_cnt;
    int pll_err, pll_lerr;
    // v4l2 decoder data
    int bpb;                   // bytes per bit * 2^16
    int bp8bl, bp8bh;          // bytes per 8-bit low/high
    int soc, eoc;              // start/end of clock run-in
};
 
using vbic_handler = void (*)(void *data, struct vt_event *ev);
 
struct vbi_client
{
    struct dl_node node[1];
    vbic_handler handler;
    void *data;
};
 
struct vbi *vbi_open(const char *vbi_dev_name, struct cache *ca, int fine_tune,
                                                               int big_buf);
void vbi_close(struct vbi *vbi);
void vbi_reset(struct vbi *vbi);
int vbi_add_handler(struct vbi *vbi, vbic_handler handler, void *data);
void vbi_del_handler(struct vbi *vbi, vbic_handler handler, void *data);
struct vt_page *vbi_query_page(struct vbi *vbi, int pgno, int subno);
void vbi_pll_reset(struct vbi *vbi, int fine_tune);
 
void vbi_handler(struct vbi *vbi, int fd);
 
#endif