[MPlayer-cvslog] r23919 - trunk/stream/tvi_vbi.c
voroshil
subversion at mplayerhq.hu
Sun Jul 29 19:52:12 CEST 2007
Author: voroshil
Date: Sun Jul 29 19:52:11 2007
New Revision: 23919
Log:
Teletext support.
Part 1/5: core stuff
Added:
trunk/stream/tvi_vbi.c (contents, props changed)
Added: trunk/stream/tvi_vbi.c
==============================================================================
--- (empty file)
+++ trunk/stream/tvi_vbi.c Sun Jul 29 19:52:11 2007
@@ -0,0 +1,1365 @@
+/*
+ * Teletext support
+ * Copyright (C) 2007 Vladimir Voroshilov <voroshil at gmail.com>
+ *
+ * This file is part of MPlayer.
+ *
+ * MPlayer 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * MPlayer 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 MPlayer; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ *
+ * Based on Attila Otvos' teletext patch, Michael Niedermayer's
+ * proof-of-concept teletext capture utility and some parts
+ * (decode_raw_line_runin,pll_add,pll_reset) of MythTV project.
+ *
+ *
+ * Some implementation details:
+ * How to port teletext to another tvi_* driver (see tvi_v4l2.c for example):
+ *
+ * 1. Implement TVI_CONTROL_VBI_INIT (initialize driver-related vbi subsystem,
+ * start grabbing thread)
+ * input data: vbi device name.
+ * (driver should also call TV_VBI_CONTROL_START for common vbi subsystem initialization
+ * with pointer to initialized tt_stream_properties structure.
+ * After ioctl call variable will contain pointer to initialized priv_vbi_t structure.
+ *
+ * 2. After receiving next chunk of raw vbi data call TV_VBI_CONTROL_DECODE_PAGE
+ * ioctl with pointer to data buffer
+ * 3. pass all other VBI related ioctl cmds to teletext_control routine
+ *
+ * Page displaying process consist of following stages:
+ *
+ * ---grabbing stage---
+ * 0. stream/tvi_*.c: vbi_grabber(...)
+ * getting vbi data from video device
+ * ---decoding stage---
+ * 1. stream/tvi_vbi.c: decode_raw_line_runin(...) or decode_raw_line_sine(...)
+ * decode raw vbi data into sliced 45(?) bytes long packets
+ * 2. stream/tvi_vbi.c: decode_pkt0(...), decode_pkt_page(...)
+ * packets processing (header analyzing, storing complete page in cache,
+ * only raw member of tt_char is filled at this stage)
+ * 3. stream/tvi_vbi.c: decode_page(...)
+ * page decoding. filling unicode,gfx,ctl,etc members of tt_char structure
+ * with appropriate values according to teletext control chars, converting
+ * text to utf8.
+ * ---rendering stage---
+ * 4. stream/tvi_vbi.c: prepare_visible_page(...)
+ * processing page. adding number of just received by background process
+ * teletext page, adding current time,etc.
+ * 5. libvo/sub.c: vo_update_text_teletext(...)
+ * rendering displayable osd with text and graphics
+ *
+ * TODO:
+ * v4lv1,bktr support
+ * spu rendering
+ * is better quality on poor signal possible ?
+ * link support
+ * font autoscale
+ * greyscale osd
+ * slave command for dumping pages
+ * fix bcd<->dec as suggested my Michael
+ *
+ * BUGS:
+ * wrong colors in debug dump
+ * blinking when visible page was just updated
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <math.h>
+#include <stdio.h>
+
+#include <pthread.h>
+
+#include "tv.h"
+#include "mp_msg.h"
+#include "help_mp.h"
+#include "libmpcodecs/img_format.h"
+#include "libavutil/common.h"
+#include "input/input.h"
+
+//#define DEBUG_DUMP 1
+
+/// page magazine entry structure
+typedef struct mag_s{
+ tt_page* pt;
+ int order;
+ int lang;
+} mag_t;
+
+typedef struct {
+ int on; ///< teletext on/off
+ int pagenum; ///< seek page number
+ int subpagenum; ///< seek subpage
+ int curr_pagenum; ///< current page number
+ int pagenumdec; ///< set page num with dec
+
+ teletext_format tformat; ///< see teletext_format enum
+ teletext_zoom zoom; ///< see teletext_zoom enum
+ mag_t* mag; ///< pages magazine (has 8 entities)
+ /// Currently displayed page (with additional info, e.g current time)
+ tt_char display_page[VBI_ROWS*VBI_COLUMNS];
+ /// number of raw bytes between two subsequent encoded bits
+ int bpb;
+ /// clock run-in sequence will be searched in buffer in [soc:eoc] bytes range
+ int soc;
+ int eoc;
+ /// minimum number of raw vbi bytes wich can be decoded into 8 data bits
+ int bp8bl;
+ /// maximum number of raw vbi bytes wich can be decoded into 8 data bits
+ int bp8bh;
+
+ int pll_adj;
+ int pll_dir;
+ int pll_cnt;
+ int pll_err;
+ int pll_lerr;
+ int pll_fixed;
+ /// vbi stream properties (buffer size,bytes per line, etc)
+ tt_stream_props* ptsp;
+ pthread_mutex_t buffer_mutex;
+
+ tt_page** ptt_cache;
+ unsigned char* ptt_cache_first_subpage;
+} priv_vbi_t;
+
+static unsigned char fixParity[256];
+
+static tt_char tt_space={0x20,7,0,0,0,0,0x20};
+static tt_char tt_error={'?',1,0,0,0,0,'?'}; // Red '?' on black background
+static double si[12];
+static double co[12];
+
+#define VBI_FORMAT(priv) (*(priv->ptsp))
+
+#define FIXP_SH 16
+#define ONE_FIXP (1<<FIXP_SH)
+#define FIXP2INT(a) ((a)>>FIXP_SH)
+#define ANY2FIXP(a) ((int)((a)*ONE_FIXP))
+
+static const unsigned char corrHamm48[256]={
+ 0x01, 0xff, 0x01, 0x01, 0xff, 0x00, 0x01, 0xff,
+ 0xff, 0x02, 0x01, 0xff, 0x0a, 0xff, 0xff, 0x07,
+ 0xff, 0x00, 0x01, 0xff, 0x00, 0x00, 0xff, 0x00,
+ 0x06, 0xff, 0xff, 0x0b, 0xff, 0x00, 0x03, 0xff,
+ 0xff, 0x0c, 0x01, 0xff, 0x04, 0xff, 0xff, 0x07,
+ 0x06, 0xff, 0xff, 0x07, 0xff, 0x07, 0x07, 0x07,
+ 0x06, 0xff, 0xff, 0x05, 0xff, 0x00, 0x0d, 0xff,
+ 0x06, 0x06, 0x06, 0xff, 0x06, 0xff, 0xff, 0x07,
+ 0xff, 0x02, 0x01, 0xff, 0x04, 0xff, 0xff, 0x09,
+ 0x02, 0x02, 0xff, 0x02, 0xff, 0x02, 0x03, 0xff,
+ 0x08, 0xff, 0xff, 0x05, 0xff, 0x00, 0x03, 0xff,
+ 0xff, 0x02, 0x03, 0xff, 0x03, 0xff, 0x03, 0x03,
+ 0x04, 0xff, 0xff, 0x05, 0x04, 0x04, 0x04, 0xff,
+ 0xff, 0x02, 0x0f, 0xff, 0x04, 0xff, 0xff, 0x07,
+ 0xff, 0x05, 0x05, 0x05, 0x04, 0xff, 0xff, 0x05,
+ 0x06, 0xff, 0xff, 0x05, 0xff, 0x0e, 0x03, 0xff,
+ 0xff, 0x0c, 0x01, 0xff, 0x0a, 0xff, 0xff, 0x09,
+ 0x0a, 0xff, 0xff, 0x0b, 0x0a, 0x0a, 0x0a, 0xff,
+ 0x08, 0xff, 0xff, 0x0b, 0xff, 0x00, 0x0d, 0xff,
+ 0xff, 0x0b, 0x0b, 0x0b, 0x0a, 0xff, 0xff, 0x0b,
+ 0x0c, 0x0c, 0xff, 0x0c, 0xff, 0x0c, 0x0d, 0xff,
+ 0xff, 0x0c, 0x0f, 0xff, 0x0a, 0xff, 0xff, 0x07,
+ 0xff, 0x0c, 0x0d, 0xff, 0x0d, 0xff, 0x0d, 0x0d,
+ 0x06, 0xff, 0xff, 0x0b, 0xff, 0x0e, 0x0d, 0xff,
+ 0x08, 0xff, 0xff, 0x09, 0xff, 0x09, 0x09, 0x09,
+ 0xff, 0x02, 0x0f, 0xff, 0x0a, 0xff, 0xff, 0x09,
+ 0x08, 0x08, 0x08, 0xff, 0x08, 0xff, 0xff, 0x09,
+ 0x08, 0xff, 0xff, 0x0b, 0xff, 0x0e, 0x03, 0xff,
+ 0xff, 0x0c, 0x0f, 0xff, 0x04, 0xff, 0xff, 0x09,
+ 0x0f, 0xff, 0x0f, 0x0f, 0xff, 0x0e, 0x0f, 0xff,
+ 0x08, 0xff, 0xff, 0x05, 0xff, 0x0e, 0x0d, 0xff,
+ 0xff, 0x0e, 0x0f, 0xff, 0x0e, 0x0e, 0xff, 0x0e };
+
+
+enum {
+ LAT_UNI=0,
+ RUS_UNI,
+ LANGS
+};
+
+// conversion table for chars 0x20-0x7F (UTF8)
+// TODO: add another languages
+static unsigned int lang_chars[LANGS][0x60]={
+ {
+ //Latin
+ 0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,
+ 0x28,0x29,0x2a,0x2b,0x2c,0x2d,0x2e,0x2f,
+ 0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,
+ 0x38,0x39,0x3a,0x3b,0x3c,0x3d,0x3e,0x3f,
+ 0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47,
+ 0x48,0x49,0x4a,0x4b,0x4c,0x4d,0x4e,0x4f,
+ 0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57,
+ 0x58,0x59,0x5a,0x5b,0x5c,0x5d,0x5e,0x5f,
+ 0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67,
+ 0x68,0x69,0x6a,0x6b,0x6c,0x6d,0x6e,0x6f,
+ 0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,
+ 0x78,0x79,0x7a,0x7b,0x7c,0x7d,0x7e,0x7f
+ },
+ {
+ //Russian
+ 0x20,0x21,0x22,0x23,0x24,0x25,0x044b,0x27,
+ 0x28,0x29,0x2a,0x2b,0x2c,0x2d,0x2e,0x2f,
+ 0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,
+ 0x38,0x39,0x3a,0x3b,0x3c,0x3d,0x3e,0x3f,
+ 0x042e,0x0410,0x0411,0x0426,0x0414,0x0415,0x0424,0x0413,
+ 0x0425,0x0418,0x0419,0x041a,0x041b,0x041c,0x041d,0x041e,
+ 0x041f,0x042f,0x0420,0x0421,0x0422,0x0423,0x0416,0x0412,
+ 0x042c,0x042a,0x0417,0x0428,0x042d,0x0429,0x0427,0x042b,
+ 0x044e,0x0430,0x0431,0x0446,0x0434,0x0435,0x0444,0x0433,
+ 0x0445,0x0438,0x0439,0x043a,0x043b,0x043c,0x043d,0x043e,
+ 0x043f,0x044f,0x0440,0x0441,0x0442,0x0443,0x0436,0x0432,
+ 0x044c,0x044a,0x0437,0x0448,0x044d,0x0449,0x0447,0x044b
+ }
+};
+
+static int lang2id (int lang){
+ switch(lang){
+ case 0:
+ return LAT_UNI;
+ case 3: /* Stub. My teletext provider (1TV, Russia) sets this this language
+ code for russian teletext pages
+ TODO: make this configurable
+ */
+ return RUS_UNI;
+ default:
+ return LAT_UNI;
+ }
+}
+
+/**
+ * \brief convert chars from curent teletext codepage into MPlayer charset
+ * \param p raw teletext char to decode
+ * \param lang teletext internal language code (see lang2id)
+ * \return UTF8 char
+ *
+ * \remarks
+ * routine will analyze raw member of given tt_char structure and
+ * fill unicode member of the same struct with appropriate utf8 code.
+ */
+static unsigned int conv2uni(unsigned int p,int lang)
+{
+ if(p<0x80 && p>=0x20){
+ return lang_chars[lang][p-0x20];
+ }else
+ return 0x20;
+}
+
+static void init_vbi_consts(priv_vbi_t* priv){
+ int i,j;
+ double ang;
+ for(i=0; i<256; i++){
+ j=i&0x7F;
+ j^= j+j;
+ j^= j<<2;
+ j^= j<<4;
+ fixParity[i]= i ^ (j&0x80) ^ 0x80;
+ }
+
+ for(i=0,ang=0; i<12; i++,ang+=M_PI/priv->bpb){
+ si[i]= sin(ang);
+ co[i]= cos(ang);
+ }
+
+ priv->bpb=(priv->ptsp->sampling_rate/6937500.0)*ONE_FIXP+0.5;
+//FIXME: STUBS!!!!
+ priv->soc=0;
+ priv->eoc=92;
+//END STUBS!!!
+ priv->bp8bl=0.97*8*priv->bpb/ONE_FIXP; // -3% tolerance
+ priv->bp8bh=1.03*8*priv->bpb/ONE_FIXP; // +3% tolerance
+}
+/**
+ * \brief calculate increased/decreased by given value page number
+ * \param curr current page number in hexadecimal for
+ * \param direction decimal value (can be negative) to add to value
+ * of curr parameter
+ * \return new page number in hexadecimal form
+ *
+ * VBI page numbers are represented in special hexadecimal form, e.g.
+ * page with number 123 (as seen by user) internally has number 0x123.
+ * and equation 0x123+8 should be equal to 0x131 instead of regular 0x12b.
+ *
+ *
+ * Page numbers 0xYYY (where Y is not belongs to (0..9).
+ * Page number belongs to [0x000,0x799] or [0x100:0x899] (first 0 can be
+ * treated as '8')
+ */
+static int steppage(int p, int direction, int skip_hidden)
+{
+ if(skip_hidden)
+ p=(p&15)+((p>>4)&15)*10+(p>>8)*100;
+ p+=direction;
+ if(skip_hidden){
+ p=(p+800)%800;
+ p=(p%10)+((p/10)%10)*16+(p/100)*256;
+ }
+
+ return p&0x7ff;
+}
+
+/*
+------------------------------------------------------------------
+ Cache stuff
+------------------------------------------------------------------
+*/
+
+/**
+ * \brief add/update entry in cache
+ * \param priv private data structure
+ * \param pg page to store in cache
+ * \param line line to update (value below 0 means update entire page)
+ */
+static void put_to_cache(priv_vbi_t* priv,tt_page* pg,int line){
+ tt_page* pgc; //page in cache
+ int i,count;
+
+ if(line<0){
+ i=0;
+ count=VBI_ROWS*VBI_COLUMNS;
+ }else if(line<VBI_ROWS){
+ i=line*VBI_COLUMNS;
+ count=(line+1)*VBI_COLUMNS;
+ }else
+ return;
+
+ pthread_mutex_lock(&(priv->buffer_mutex));
+
+ if(!priv->ptt_cache[pg->pagenum]){
+ priv->ptt_cache[pg->pagenum]=calloc(1,sizeof(tt_page));
+ pgc=priv->ptt_cache[pg->pagenum];
+ }else{
+ pgc=priv->ptt_cache[pg->pagenum];
+ while(pgc->next_subpage && pgc->subpagenum!=pg->subpagenum)
+ pgc=pgc->next_subpage;
+
+ if(pgc->subpagenum!=pg->subpagenum){
+ pgc->next_subpage=calloc(1,sizeof(tt_page));
+ pgc=pgc->next_subpage;
+ }
+ }
+ pgc->pagenum=pg->pagenum;
+ pgc->subpagenum=pg->subpagenum;
+ pgc->lang=pg->lang;
+ pgc->flags=pg->flags;
+ //instead of copying entire page into cache, copy only undamaged
+ //symbols into cache
+ for(;i<count;i++){
+ if(!(pg->raw[i]&0x80))
+ pgc->raw[i]=pg->raw[i];
+ else
+ mp_msg(MSGT_TV,MSGL_DBG3,"char error. pg:%x, c[%d]=0x%x\n",
+ pg->pagenum,i,pg->raw[i]);
+ }
+ pgc->active=1;
+ pthread_mutex_unlock(&(priv->buffer_mutex));
+}
+
+/**
+ * \brief get any subpage number of given page
+ * \param priv private data structure
+ * \param pagenum page number to search subpages in
+ *
+ * \return subpage number of first found subpage which belongs to
+ * given page number
+ *
+ * \note page itself is subpage too (and usually has subpage number 0)
+ */
+static inline int get_subpagenum_from_cache(priv_vbi_t* priv, int pagenum){
+ if (!priv->ptt_cache[pagenum])
+ return -1;
+ else
+ return priv->ptt_cache[pagenum]->subpagenum;
+}
+
+/**
+ * \brief get page from cache by it page and subpage number
+ * \param priv private data structure
+ * \param pagenum page number
+ * \param subpagenum subpage number
+ *
+ * \return pointer to tt_page structure if requested page is found
+ * and NULL otherwise
+ */
+static inline tt_page* get_from_cache(priv_vbi_t* priv, int pagenum,int subpagenum){
+ tt_page* tp=priv->ptt_cache[pagenum];
+
+ while(tp && tp->subpagenum!=subpagenum)
+ tp=tp->next_subpage;
+ return tp;
+}
+
+/**
+ * \brief clears cache
+ * \param priv private data structure
+ *
+ * Deletes all tt_page structures from cache and frees allocated memory.
+ * Only zero-filled array of pointers remains in memory
+ */
+static void clear_cache(priv_vbi_t* priv){
+ int i;
+ tt_page* tp;
+ for(i=0;i<VBI_MAX_PAGES;i++){
+ while(priv->ptt_cache[i]){
+ tp=priv->ptt_cache[i];
+ priv->ptt_cache[i]=tp->next_subpage;
+ free(tp);
+ }
+ }
+}
+
+/**
+ * \brief cache initialization
+ * \param priv private data structure
+ *
+ * \note Has to be called before any cache operations!
+ */
+static void init_cache(priv_vbi_t* priv){
+ priv->ptt_cache=calloc(VBI_MAX_PAGES,sizeof(tt_page*));
+}
+
+/**
+ * \brief destroys cache
+ * \param priv private data structure
+ *
+ * Frees all memory allocated for cache (including array of pointers).
+ * It is safe to call this routine multiple times
+ */
+static void destroy_cache(priv_vbi_t* priv){
+ if(priv->ptt_cache){
+ clear_cache(priv);
+ free(priv->ptt_cache);
+ priv->ptt_cache=NULL;
+ }
+}
+
+/*
+------------------------------------------------------------------
+ Decoder stuff
+------------------------------------------------------------------
+*/
+/**
+ * \brief converts raw teletext page into useful format (1st rendering stage)
+ * \param pg page to decode
+ *
+ * Routine fills tt_char structure of each teletext_page character with proper
+ * info about foreground and background colors, character
+ * type (graphics/control/text).
+ */
+static void decode_page(tt_char* p,int lang,unsigned char* raw)
+{
+ int c,gfx=0,lat=0;
+ int i=0;
+ int fg_color=0;
+ int bg_color=0;
+ int row,col;
+ int separated=0;
+
+ for(row=0;row<VBI_ROWS;row++) {
+ lat=(lang==0);
+ gfx=0;
+ fg_color=7;
+ bg_color=0;
+ separated=0;
+ for(col=0;col<VBI_COLUMNS;col++){
+ i=row*VBI_COLUMNS+col;
+ c=raw[i];
+ p[i].raw=c;
+ if(c&0x80){ //damaged char
+ p[i]=tt_error;
+ continue;
+ }
+ p[i].gfx=gfx?(separated?2:1):0;
+ p[i].lng=lat?0:lang;
+ p[i].ctl=(c&0x60)==0?1:0;
+ p[i].fg=fg_color;
+ p[i].bg=bg_color;
+
+ if ((c&0x60)==0){ //control chars
+ if(c>=0x08 && c<=0x0f){
+ }else if (c<=0x17){ //colors
+ fg_color=c&0x0f;
+ gfx=c>>4;
+ }else if (c<=0x18){
+ }else if (c<=0x1a){ //Contiguous/Separated gfx
+ separated=!(c&1);
+ }else if (c<=0x1b){
+ lat=!lat;
+ }else if (c<=0x1d){
+ bg_color=(c&1)?fg_color:0;
+ p[i].bg=bg_color;
+ }
+ p[i].ctl=1;
+ p[i].unicode=p[i].gfx?0:' ';
+ continue;
+ }
+
+ if(gfx){
+ p[i].unicode=c-0x20;
+ if (p[i].unicode>0x3f) p[i].unicode-=0x20;
+ }else
+ p[i].unicode=conv2uni(c,lang2id(p[i].lng));
+
+ p[i].fg=fg_color;
+ p[i].bg=bg_color;
+ }
+ }
+}
+
+/**
+ * \brief prepares current page for displaying
+ * \param priv_vbi private data structure
+ *
+ * Routine adds some useful info (time and page number of page, grabbed by
+ * background thread to top line of current page). Displays "No teletext"
+ * string if no vbi data available.
+ */
+#define PRINT_HEX(dp,i,h) dp[i].unicode=((h)&0xf)>9?'A'+((h)&0xf):'0'+((h)&0xf)
+static void prepare_visible_page(priv_vbi_t* priv){
+ tt_page *pg,*curr_pg;
+ unsigned char *p;
+ int i;
+
+ pthread_mutex_lock(&(priv->buffer_mutex));
+ mp_msg(MSGT_TV,MSGL_DBG3,"tvi_vbi: prepare_visible_page pg:0x%x, sub:0x%x\n",
+ priv->pagenum,priv->subpagenum);
+ if(priv->subpagenum==-1) //no page yet
+ priv->subpagenum=get_subpagenum_from_cache(priv,priv->pagenum);
+
+ pg=get_from_cache(priv,priv->pagenum,priv->subpagenum);
+ mp_dbg(MSGT_TV,MSGL_DBG3,"tvi_vbi: prepare_vibible_page2 pg:0x%x, sub:0x%x\n",
+ priv->pagenum,priv->subpagenum);
+
+ curr_pg=get_from_cache(priv,priv->curr_pagenum,
+ get_subpagenum_from_cache(priv,priv->curr_pagenum));
+ if (!pg && !curr_pg){
+ p=MSGTR_TV_NoTeletext;
+ for(i=0;i<VBI_COLUMNS && *p;i++){
+ GET_UTF8(priv->display_page[i].unicode,*p++,break;);
+ }
+ for(;i<VBI_ROWS*VBI_COLUMNS;i++)
+ priv->display_page[i]=tt_space;
+ pthread_mutex_unlock(&(priv->buffer_mutex));
+ return;
+ }
+
+ if (!pg || !pg->active){
+ for(i=0;i<VBI_ROWS*VBI_COLUMNS;i++){
+ priv->display_page[i]=tt_space;
+ }
+ }else{
+ decode_page(priv->display_page,pg->lang,pg->raw);
+ mp_msg(MSGT_TV,MSGL_DBG3,"page #%x was decoded!\n",pg->pagenum);
+ }
+
+ PRINT_HEX(priv->display_page,0,(priv->curr_pagenum&0x700)?priv->curr_pagenum>>8:8);
+ PRINT_HEX(priv->display_page,1,priv->curr_pagenum>>4);
+ PRINT_HEX(priv->display_page,2,priv->curr_pagenum);
+ priv->display_page[3].unicode=' ';
+ priv->display_page[4].unicode=' ';
+ switch(priv->pagenumdec>>12){
+ case 1:
+ priv->display_page[5].unicode='_';
+ priv->display_page[6].unicode='_';
+ PRINT_HEX(priv->display_page,7,priv->pagenumdec);
+ break;
+ case 2:
+ priv->display_page[5].unicode='_';
+ PRINT_HEX(priv->display_page,6,priv->pagenumdec>>4);
+ PRINT_HEX(priv->display_page,7,priv->pagenumdec);
+ break;
+ default:
+ PRINT_HEX(priv->display_page,5,(priv->pagenum&0x700)?priv->pagenum>>8:8);
+ PRINT_HEX(priv->display_page,6,priv->pagenum>>4);
+ PRINT_HEX(priv->display_page,7,priv->pagenum);
+ }
+ if(priv->subpagenum!=-1){
+ priv->display_page[8].unicode='.';
+ PRINT_HEX(priv->display_page,9,priv->subpagenum>>4);
+ PRINT_HEX(priv->display_page,10,priv->subpagenum);
+ }else{
+ priv->display_page[8].unicode=' ';
+ priv->display_page[9].unicode=' ';
+ priv->display_page[10].unicode=' ';
+ }
+ priv->display_page[11].unicode=' ';
+ for(i=VBI_TIME_LINEPOS;i<VBI_COLUMNS;i++){
+ priv->display_page[i].unicode=curr_pg->raw[i];
+ }
+ pthread_mutex_unlock(&(priv->buffer_mutex));
+}
+/*
+------------------------------------------------------------------
+ Renderer stuff
+------------------------------------------------------------------
+*/
+#ifdef DEBUG_DUMP
+/**
+ * \brief renders teletext page into given file
+ * \param pt page to render
+ * \param f opened file descriptor
+ * \param pagenum which page to render
+ * \param colored use colors not implementede yet)
+ *
+ * Text will be UTF8 encoded
+ */
+static void render2text(tt_page* pt,FILE* f,int colored){
+ int i,j;
+ unsigned int u;
+ unsigned char buf[8];
+ unsigned char tmp;
+ int pos;
+ tt_char dp[VBI_ROWS*VBI_COLUMNS];
+ int color=0;
+ int bkg=0;
+ int c1,b1;
+ if(!pt)
+ return;
+ fprintf(f,"+========================================+\n");
+ fprintf(f,"| lang:%d pagenum:0x%x subpagenum:%d flags:0x%x|\n",
+ pt->lang,
+ pt->pagenum,
+ pt->subpagenum,
+ 0);
+ fprintf(f,"+----------------------------------------+\n");
+
+ decode_page(dp,pt->lang,pt->raw);
+ for(i=0;i<VBI_ROWS;i++){
+ fprintf(f,"|");
+ if(colored) fprintf(f,"\033[40m");
+ for(j=0;j<VBI_COLUMNS;j++)
+ {
+ u=dp[i*VBI_COLUMNS+j].unicode;
+ switch(dp[i*VBI_COLUMNS+j].fg){
+ case 0 ... 7:
+ c1=30+dp[i*VBI_COLUMNS+j].fg;
+ break;
+ default:
+ c1=38;
+ break;
+ }
+ switch(dp[i*VBI_COLUMNS+j].bg){
+ case 0 ... 7:
+ b1=40+dp[i*VBI_COLUMNS+j].bg;
+ break;
+ default:
+ b1=40;
+ }
+ if (b1!=bkg && colored){
+ fprintf(f,"\033[%dm",b1);
+ bkg=b1;
+ }
+ if(c1!=color && colored){
+ fprintf(f,"\033[%dm",c1);
+ color=c1;
+ }
+ if(dp[i*VBI_COLUMNS+j].gfx){
+ fprintf(f,"*");
+ }else{
+ pos=0;
+ PUT_UTF8(u,tmp,if(pos<7) buf[pos++]=tmp;);
+ buf[pos]='\0';
+ fprintf(f,"%s",buf);
+ }
+ }
+
+ if (colored) fprintf(f,"\033[0m");
+ color=-1;bkg=-1;
+ fprintf(f,"|\n");
+ }
+#if 1
+ //for debug
+ fprintf(f,"+====================raw=================+\n");
+ for(i=0;i<VBI_ROWS;i++){
+ for(j=0;j<VBI_COLUMNS;j++)
+ fprintf(f,"%02x ",dp[i*VBI_COLUMNS+j].raw);
+ fprintf(f,"\n");
+ }
+ fprintf(f,"+====================lng=================+\n");
+ for(i=0;i<VBI_ROWS;i++){
+ for(j=0;j<VBI_COLUMNS;j++)
+ fprintf(f,"%02x ",dp[i*VBI_COLUMNS+j].lng);
+ fprintf(f,"\n");
+ }
+#endif
+ fprintf(f,"+========================================+\n");
+}
+
+/**
+ * \brief dump page into pgXXX.txt file in vurrent directory
+ * \param pt page to dump
+ *
+ * \note XXX in filename is page number
+ * \note use only for debug purposes
+ */
+static void dump_page(tt_page* pt)
+{
+ FILE*f;
+ char name[100];
+ snprintf(name,99,"pg%x.txt",pt->pagenum);
+ f=fopen(name,"wb");
+ render2text(pt,f,1);
+ fclose(f);
+}
+#endif //DEBUG_DUMP
+
+
+/**
+ * \brief checks whether page is ready and copies it into cache array if so
+ * \param priv private data structure
+ * \param magAddr page's magazine address (0-7)
+ *
+ * Routine also calls decode_page to perform 1st stage of rendering
+ */
+static void store_in_cache(priv_vbi_t* priv, int magAddr, int line){
+ mp_msg(MSGT_TV,MSGL_DBG2,"store_in_cache(%d): pagenum:%x\n",
+ priv->mag[magAddr].order,
+ priv->mag[magAddr].pt->pagenum);
+
+ put_to_cache(priv,priv->mag[magAddr].pt,line);
+ priv->curr_pagenum=priv->mag[magAddr].pt->pagenum;
+
+#ifdef DEBUG_DUMP
+ dump_page(get_from_cache(priv,
+ priv->mag[magAddr].pt->pagenum,
+ priv->mag[magAddr].pt->subpagenum));
+#endif
+}
+
+
+/*
+------------------------------------------------------------------
+ Grabber stuff
+------------------------------------------------------------------
+*/
+#define PLL_SAMPLES 4
+#define PLL_ERROR 4
+#define PLL_ADJUST 4
+
+/**
+ * \brief adjust current phase for better signal decoding
+ * \param n count of bytes processed (?)
+ * \param err count of error bytes (?)
+ *
+ * \remarks code was got from MythTV project
+ */
+static void pll_add(priv_vbi_t* priv,int n,int err){
+ if(priv->pll_fixed)
+ return;
+ if(err>PLL_ERROR*2/3)
+ err=PLL_ERROR*2/3;
+ priv->pll_err+=err;
+ priv->pll_cnt+=n;
+ if(priv->pll_cnt<PLL_SAMPLES)
+ return;
+ if(priv->pll_err>PLL_ERROR)
+ {
+ if(priv->pll_err>priv->pll_lerr)
+ priv->pll_dir= -priv->pll_dir;
+ priv->pll_lerr=priv->pll_err;
+ priv->pll_adj+=priv->pll_dir;
+ if (priv->pll_adj<-PLL_ADJUST || priv->pll_adj>PLL_ADJUST)
+ {
+ priv->pll_adj=0;
+ priv->pll_dir=-1;
+ priv->pll_lerr=0;
+ }
+ mp_msg(MSGT_TV,MSGL_DBG3,"vbi: pll_adj=%2d\n",priv->pll_adj);
+ }
+ priv->pll_cnt=0;
+ priv->pll_err=0;
+}
+
+/**
+ * \brief reset error correction
+ * \param priv private data structure
+ * \param fine_tune shift value for adjusting
+ *
+ * \remarks code was got from MythTV project
+ */
+static void pll_reset(priv_vbi_t* priv,int fine_tune){
+ priv->pll_fixed=fine_tune >= -PLL_ADJUST && fine_tune <= PLL_ADJUST;
+
+ priv->pll_err=0;
+ priv->pll_lerr=0;
+ priv->pll_cnt=0;
+ priv->pll_dir=-1;
+ priv->pll_adj=0;
+ if(priv->pll_fixed)
+ priv->pll_adj=fine_tune;
+ if(priv->pll_fixed)
+ mp_msg(MSGT_TV,MSGL_DBG3,"pll_reset (fixed@%2d)\n",priv->pll_adj);
+ else
+ mp_msg(MSGT_TV,MSGL_DBG3,"pll_reset (auto)\n");
+
+}
+/**
+ * \brief decode packet 0 (teletext page header)
+ * \param priv private data structure
+ * \param data raw teletext data (with not applied hamm correction yet)
+ * \param magAddr teletext page's magazine address
+ *
+ * \remarks
+ * data buffer was shifted by 6 and now contains:
+ * 0..1 page number
+ * 2..5 sub-code
+ * 6..7 control codes
+ * 8..39 display data
+ *
+ * only first 8 bytes protected by Hamm 8/4 code
+ */
+static int decode_pkt0(priv_vbi_t* priv,unsigned char* data,int magAddr)
+{
+ int d[8];
+ int i,err;
+
+ if (magAddr<0 || magAddr>7)
+ return 0;
+ for(i=0;i<8;i++){
+ d[i]= corrHamm48[ data[i] ];
+ if(d[i]&0x80){
+ pll_add(priv,2,4);
+
+ if(priv->mag[magAddr].pt)
+ free(priv->mag[magAddr].pt);
+ priv->mag[magAddr].pt=NULL;
+ priv->mag[magAddr].order=0;
+ return 0;
+ }
+ }
+ if (!priv->mag[magAddr].pt)
+ priv->mag[magAddr].pt= malloc(sizeof(tt_page));
+
+ priv->mag[magAddr].lang= d[7] & 0x7;
+ priv->mag[magAddr].pt->lang=priv->mag[magAddr].lang;
+ priv->mag[magAddr].pt->subpagenum=(d[2]|(d[3]<<4)|(d[4]<<8)|(d[5]<<12))&0x3f7f;
+ priv->mag[magAddr].pt->pagenum=(magAddr<<8) | d[0] | (d[1]<<4);
+ priv->mag[magAddr].pt->flags=( d[6] | (d[7]<<4));
+
+ memset(priv->mag[magAddr].pt->raw, 0x00, VBI_COLUMNS*VBI_ROWS);
+ priv->mag[magAddr].order=0;
+
+ for(i=0;i<8;i++){
+ priv->mag[magAddr].pt->raw[i]=0x20;
+ }
+ err=0;
+ for(i=8; i<VBI_COLUMNS; i++){
+ data[i]= fixParity[data[i]];
+ priv->mag[magAddr].pt->raw[i]=data[i];
+ if(data[i]&0x80) //Error
+ err++;
+ pll_add(priv,1,err);
+ }
+
+ store_in_cache(priv,magAddr,0);
+
+ return 1;
+}
+
+/**
+ * \brief decode packets 1..24 (teletext page header)
+ * \param priv private data structure
+ * \param data raw teletext data
+ * \param magAddr teletext page's magazine address
+ * \param rowAddr teletext page's row number
+ *
+ * \remarks
+ * data buffer was shifted by 6 and now contains 40 bytes of display data:
+ * this type of packet is not proptected by Hamm 8/4 code
+ */
+static void decode_pkt_page(priv_vbi_t* priv,unsigned char*data,int magAddr,int rowAddr){
+ int i,err;
+ if (!priv->mag[magAddr].pt)
+ return;
+
+ priv->mag[magAddr].order=rowAddr;
+
+ err=0;
+ for(i=0; i<VBI_COLUMNS; i++){
+ data[i]= fixParity[ data[i] ];
+ priv->mag[magAddr].pt->raw[i+rowAddr*VBI_COLUMNS]=data[i];
+ if( data[i]&0x80) //HammError
+ err++;
+ }
+ pll_add(priv,1,err);
+
+ store_in_cache(priv,magAddr,rowAddr);
+}
+
+/**
+ * \brief decodes raw vbi data (signal amplitudes) into sequence of bytes
+ * \param priv private data structure
+ * \param buf raw vbi data (one line of frame)
+ * \param data output buffer for decoded bytes (at least 45 bytes long)
+ *
+ * Used XawTV's algorithm. Signal phase is calculated with help of starting clock
+ * run-in sequence (min/max values and bit distance values are calculated)
+ */
+static int decode_raw_line_runin(priv_vbi_t* priv,unsigned char* buf,unsigned char* data){
+ const int magic= 0x27; // reversed 1110010
+ int dt[256],hi[6],lo[6];
+ int i,x,r;
+ int decoded;
+ int sync;
+ unsigned char min,max;
+ int thr=0; //threshold
+
+ //stubs
+ int soc=0;
+ int eoc=92;
+
+ for(i=soc;i<eoc;i++)
+ dt[i]=buf[i+priv->bpb/ONE_FIXP]-buf[i]; // amplifies the edges best.
+ /* set barrier */
+ for (i=eoc; i<eoc+16; i+=2)
+ dt[i]=100, dt[i+1]=-100;
+
+ /* find 6 rising and falling edges */
+ for (i=soc, x=0; x<6; ++x)
+ {
+ while (dt[i]<32)
+ i++;
+ hi[x]=i;
+ while (dt[i]>-32)
+ i++;
+ lo[x]=i;
+ }
+ if (i>=eoc)
+ {
+ return 0; // not enough periods found
+ }
+ i=hi[5]-hi[1]; // length of 4 periods (8 bits)
+ if (i<priv->bp8bl || i>priv->bp8bh)
+ {
+ mp_msg(MSGT_TV,MSGL_DBG3,"vbi: wrong freq %d (%d,%d)\n",
+ i,priv->bp8bl,priv->bp8bh);
+ return 0; // bad frequency
+ }
+ /* AGC and sync-reference */
+ min=255, max=0, sync=0;
+ for (i=hi[4]; i<hi[5]; ++i)
+ if (buf[i]>max)
+ max=buf[i], sync=i;
+ for (i=lo[4]; i<lo[5]; ++i)
+ if (buf[i]<min)
+ min=buf[i];
+ thr=(min+max)/2;
+
+ buf+=sync;
+ // searching for '11'
+ for(i=priv->pll_adj*priv->bpb/10;i<16*priv->bpb;i+=priv->bpb)
+ if(buf[FIXP2INT(i)]>thr && buf[FIXP2INT(i+priv->bpb)]>thr)
+ break;
+ r=0;
+ for(decoded=1; decoded<= (VBI_COLUMNS+3)<<3;decoded++){
+ r>>=1;
+ if(buf[FIXP2INT(i)]>thr) r|=0x80;
+ if(!(decoded & 0x07)){
+ data[(decoded>>3) - 1]=r;
+ r=0;
+ }
+ i+=priv->bpb;
+ }
+ if(data[0]!=magic)
+ return 0; //magic not found
+
+ //stub
+ for(i=0;i<43;i++){
+ data[i]=data[i+1];
+ }
+ mp_msg(MSGT_TV,MSGL_DBG3,"thr:%d sync:%d ",thr,sync);
+
+ return 1;
+}
+
+/**
+ * \brief decodes raw vbi data (signal amplitudes) into sequence of bytes
+ * \param priv private data structure
+ * \param buf raw vbi data (one line of frame)
+ * \param data output buffer for decoded bytes (at least 45 bytes long)
+ *
+ * Used Michael Niedermayer's algorithm.
+ * Signal phase is calculated using correlation between given samples data and
+ * pure sine
+ */
+static int decode_raw_line_sine(priv_vbi_t* priv,unsigned char* buf,unsigned char* data){
+ int i,x,r,amp,xFixp;
+ int avg=0;
+ double sin_sum=0, cos_sum=0;
+
+ for(x=0; x< FIXP2INT(10*priv->bpb); x++)
+ avg+=buf[x];
+
+ avg/=FIXP2INT(10*priv->bpb);
+
+ for(x=0; x<12; x++){
+ amp= buf[x<<1];
+ sin_sum+= si[x]*(amp-avg);
+ cos_sum+= co[x]*(amp-avg);
+ }
+ //this is always zero. Why ?
+ xFixp= atan(sin_sum/cos_sum)*priv->bpb/M_PI;
+
+ //Without this line the result is full of errors
+ //and routine is unable to find magic sequence
+ buf+=FIXP2INT(10*priv->bpb);
+
+ r=0;
+ for(x=FIXP2INT(xFixp);x<70;x=FIXP2INT(xFixp)){
+ r=(r<<1) & 0xFFFF;
+ if(buf[x]>avg) r|=1;
+ xFixp+=priv->bpb;
+ if(r==0xAAE4) break;
+ }
+
+ //this is not teletext
+ if (r!=0xaae4) return 0;
+
+ //Decode remaining 45-2(clock run-in)-1(framing code)=42 bytes
+ for(i=1; i<=(42<<3); i++){
+ r>>=1;
+ x=FIXP2INT(xFixp);
+ if(buf[x]> avg)
+ r|=0x80;
+
+ if(!(i & 0x07)){
+ data[(i>>3)-1]=r;
+ r=0;
+ }
+ xFixp+=priv->bpb;
+ }
+
+ return 1;
+}
+
+/**
+ * \brief decodes all vbi lines from one video frame
+ * \param priv private data structure
+ * \param buf buffer with raw vbi data in it
+ *
+ * \note buffer size have to be at least priv->ptsp->bufsize bytes
+ */
+static void vbi_decode(priv_vbi_t* priv,unsigned char*buf){
+ int magAddr;
+ int pkt;
+ unsigned char data[64];
+ unsigned char* linep;
+ int d0,d1;
+ int i=0;
+ mp_msg(MSGT_TV,MSGL_DBG3,"vbi: vbi_decode\n");
+ for(linep=buf; linep<buf+priv->ptsp->bufsize; linep+=priv->ptsp->samples_per_line,i++){
+#if 0
+ /*
+ This routine is alternative implementation of raw VBI data decoding.
+ Unfortunately, it detects only about 20% of incoming data,
+ but Michael says that this algorithm is better, and he wants to fix it.
+ */
+ if(decode_raw_line_sine(priv,linep,data)<=0){
+#endif
+ if(decode_raw_line_runin(priv,linep,data)<=0){
+ continue; //this is not valid teletext line
+ }
+ d0= corrHamm48[ data[0] ];
+ d1= corrHamm48[ data[1] ];
+
+ if(d0&0x80 || d1&0x80){
+ pll_add(priv,2,4);
+ mp_msg(MSGT_TV,MSGL_V,"vbi_decode(%d):HammErr after decode_raw_line\n",i);
+
+ continue; //hamError
+ }
+ magAddr=d0 & 0x7;
+ pkt=(d0>>3)|(d1<<1);
+ mp_msg(MSGT_TV,MSGL_DBG3,"vbi_decode(%d):%x %x (mag:%x, pkt:%d)\n",
+ i,d0,d1,magAddr,pkt);
+ if(!pkt){
+ decode_pkt0(priv,data+2,magAddr); //skip MRGA
+ }else if(pkt>0 && pkt<VBI_ROWS){
+ if(!priv->mag[magAddr].pt) continue;
+ decode_pkt_page(priv,data+2,magAddr,pkt);//skip MRGA
+ } else {
+ mp_msg(MSGT_TV,MSGL_DBG3,"unsupported packet:%d\n",pkt);
+ }
+ }
+
+}
+
+/*
+---------------------------------------------------------------------------------
+ Public routines
+---------------------------------------------------------------------------------
+*/
+
+/**
+ * \brief toggles teletext page displaying format
+ * \param priv_vbi private data structure
+ * \param flag new format
+ * \return
+ * TVI_CONTROL_TRUE is success,
+ * TVI_CONTROL_FALSE otherwise
+ *
+ * flag:
+ * 0 - opaque
+ * 1 - transparent
+ * 2 - opaque with black foreground color (only in bw mode)
+ * 3 - transparent with black foreground color (only in bw mode)
+ */
+static int teletext_set_format(priv_vbi_t * priv, teletext_format flag)
+{
+ flag&=3;
+
+ mp_msg(MSGT_TV,MSGL_DBG3,"teletext_set_format_is called. mode:%d\n",flag);
+ pthread_mutex_lock(&(priv->buffer_mutex));
+
+ priv->tformat=flag;
+
+ priv->pagenumdec=0;
+
+ pthread_mutex_unlock(&(priv->buffer_mutex));
+ return TVI_CONTROL_TRUE;
+}
+
+/**
+ * \brief append just entered digit to editing page number
+ * \param priv_vbi private data structure
+ * \param dec decimal digit to append
+ *
+ * dec:
+ * '0'..'9' append digit
+ * '-' remove last digit (backspace emulation)
+ *
+ * This routine allows user to jump to arbitrary page.
+ * It implements simple page number editing algorithm.
+ *
+ * Subsystem can be on one of two modes: normal and page number edit mode.
+ * Zero value of priv->pagenumdec means normal mode
+ * Non-zero value means page number edit mode and equals to packed
+ * decimal number of already entered part of page number.
+ *
+ * How this works.
+ * Let's assume that current mode is normal (pagenumdec is zero), teletext page
+ * 100 are displayed as usual. topmost left corner of page contains page number.
+ * Then vbi_add_dec is sequentially called (through slave
+ * command of course) with 1,4,-,2,3 * values of dec parameter.
+ *
+ * +-----+------------+------------------+
+ * | dec | pagenumdec | displayed number |
+ * +-----+------------+------------------+
+ * | | 0x000 | 100 |
+ * +-----+------------+------------------+
+ * | 1 | 0x001 | __1 |
+ * +-----+------------+------------------+
+ * | 4 | 0x014 | _14 |
+ * +-----+------------+------------------+
+ * | - | 0x001 | __1 |
+ * +-----+------------+------------------+
+ * | 2 | 0x012 | _12 |
+ * +-----+------------+------------------+
+ * | 3 | 0x123 | 123 |
+ * +-----+------------+------------------+
+ * | | 0x000 | 123 |
+ * +-----+------------+------------------+
+ *
+ * pagenumdec will automatically receive zero value after third digit of page
+ * number is entered and current page will be switched to another one with
+ * entered page number.
+ */
+static void vbi_add_dec(priv_vbi_t * priv, char *dec)
+{
+ int count, shift;
+ if (!dec)
+ return;
+ if (!priv->on)
+ return;
+ if ((*dec<'0' || *dec>'9') && *dec!='-')
+ return;
+ if (!priv->pagenumdec) //first digit cannot be '0','9' or '-'
+ if(*dec=='-' || *dec=='0' || *dec=='9')
+ return;
+ pthread_mutex_lock(&(priv->buffer_mutex));
+ count=(priv->pagenumdec>>12)&0xf;
+ if (*dec=='-') {
+ count--;
+ if (count)
+ priv->pagenumdec=((priv->pagenumdec>>4)&0xfff)|(count<<12);
+ else
+ priv->pagenumdec=0;
+ } else {
+ shift = count * 4;
+ count++;
+ priv->pagenumdec=
+ (((priv->pagenumdec)<<4|(*dec-'0'))&0xfff)|(count<<12);
+ if (count==3) {
+ priv->pagenum=priv->pagenumdec&0x7ff;
+ priv->subpagenum=get_subpagenum_from_cache(priv,priv->pagenum);
+ priv->pagenumdec=0;
+ }
+ }
+ pthread_mutex_unlock(&(priv->buffer_mutex));
+}
+
+
+/**
+ * \brief Teletext control routine
+ * \param priv_vbi private data structure
+ * \param cmd command
+ * \param arg command parameter (has to be not null)
+ */
+int teletext_control(void* p, int cmd, void *arg)
+{
+ int fine_tune=99;
+ priv_vbi_t* priv=(priv_vbi_t*)p;
+
+ if (!priv && cmd!=TV_VBI_CONTROL_START)
+ return TVI_CONTROL_FALSE;
+ if (!arg && cmd!=TV_VBI_CONTROL_STOP)
+ return TVI_CONTROL_FALSE;
+
+ switch (cmd) {
+ case TV_VBI_CONTROL_RESET:
+ {
+ tv_param_t* tv_param=arg;
+fprintf(stderr,"%d\n",tv_param->tpage);
+ pthread_mutex_lock(&(priv->buffer_mutex));
+ priv->pagenumdec=0;
+ clear_cache(priv);
+ priv->pagenum=steppage(0,tv_param->tpage&0x7ff,1);
+ priv->tformat=tv_param->tformat;
+ priv->subpagenum=0;
+ pll_reset(priv,fine_tune);
+ pthread_mutex_unlock(&(priv->buffer_mutex));
+ return TVI_CONTROL_TRUE;
+ }
+ case TV_VBI_CONTROL_START:
+ {
+ int i;
+ tt_stream_props* ptsp=*(tt_stream_props**)arg;
+
+ if(!ptsp)
+ return TVI_CONTROL_FALSE;
+
+ priv=calloc(1,sizeof(priv_vbi_t));
+
+ priv->ptsp=malloc(sizeof(tt_stream_props));
+ memcpy(priv->ptsp,ptsp,sizeof(tt_stream_props));
+ *(priv_vbi_t**)arg=priv;
+
+ priv->subpagenum=0;
+ pthread_mutex_init(&priv->buffer_mutex, NULL);
+ priv->pagenumdec=0;
+ for(i=0;i<VBI_ROWS*VBI_COLUMNS;i++)
+ priv->display_page[i]=tt_space;
+
+ priv->mag=calloc(8,sizeof(mag_t));
+ init_cache(priv);
+ init_vbi_consts(priv);
+ pll_reset(priv,fine_tune);
+ return TVI_CONTROL_TRUE;
+ }
+ case TV_VBI_CONTROL_STOP:
+ {
+ if(priv->mag)
+ free(priv->mag);
+ if(priv->ptsp)
+ free(priv->ptsp);
+ destroy_cache(priv);
+ free(priv);
+ return TVI_CONTROL_TRUE;
+ }
+ case TV_VBI_CONTROL_SET_MODE:
+ priv->on=(*(int*)arg%2);
+ return TVI_CONTROL_TRUE;
+ case TV_VBI_CONTROL_GET_MODE:
+ *(int*)arg=priv->on;
+ return TVI_CONTROL_TRUE;
+ case TV_VBI_CONTROL_SET_FORMAT:
+ return teletext_set_format(priv, *(int *) arg);
+ case TV_VBI_CONTROL_GET_FORMAT:
+ pthread_mutex_lock(&(priv->buffer_mutex));
+ *(int*)arg=priv->tformat;
+ pthread_mutex_unlock(&(priv->buffer_mutex));
+ return TVI_CONTROL_TRUE;
+ case TV_VBI_CONTROL_GET_HALF_PAGE:
+ if(!priv->on)
+ return TVI_CONTROL_FALSE;
+ *(int *)arg=priv->zoom;
+ return TVI_CONTROL_TRUE;
+ case TV_VBI_CONTROL_SET_HALF_PAGE:
+ {
+ int val=*(int*)arg;
+ val%=3;
+ if(val<0)
+ val+=3;
+ pthread_mutex_lock(&(priv->buffer_mutex));
+ priv->zoom=val;
+ pthread_mutex_unlock(&(priv->buffer_mutex));
+ return TVI_CONTROL_TRUE;
+ }
+ case TV_VBI_CONTROL_SET_PAGE:
+ {
+ int val=*(int *) arg;
+ if(val<100 || val>0x899)
+ return TVI_CONTROL_FALSE;
+ pthread_mutex_lock(&(priv->buffer_mutex));
+ priv->pagenum=val&0x7ff;
+ priv->subpagenum=get_subpagenum_from_cache(priv,priv->pagenum);
+ priv->pagenumdec=0;
+ pthread_mutex_unlock(&(priv->buffer_mutex));
+ return TVI_CONTROL_TRUE;
+ }
+ case TV_VBI_CONTROL_STEP_PAGE:
+ {
+ int direction=*(int *) arg;
+ pthread_mutex_lock(&(priv->buffer_mutex));
+ priv->pagenum=steppage(priv->pagenum, direction,1);
+ priv->subpagenum=get_subpagenum_from_cache(priv,priv->pagenum);
+ priv->pagenumdec=0;
+ pthread_mutex_unlock(&(priv->buffer_mutex));
+ return TVI_CONTROL_TRUE;
+ }
+ case TV_VBI_CONTROL_GET_PAGE:
+ *(int*)arg=((priv->pagenum+0x700)&0x7ff)+0x100;
+ return TVI_CONTROL_TRUE;
+ case TV_VBI_CONTROL_SET_SUBPAGE:
+ pthread_mutex_lock(&(priv->buffer_mutex));
+ priv->pagenumdec=0;
+ priv->subpagenum=*(int*)arg;
+ if(priv->subpagenum<0)
+ priv->subpagenum=0;
+ if(priv->subpagenum>=VBI_MAX_SUBPAGES)
+ priv->subpagenum=VBI_MAX_SUBPAGES-1;
+ pthread_mutex_unlock(&(priv->buffer_mutex));
+ return TVI_CONTROL_TRUE;
+ case TV_VBI_CONTROL_GET_SUBPAGE:
+ *(int*)arg=priv->subpagenum;
+ return TVI_CONTROL_TRUE;
+ case TV_VBI_CONTROL_ADD_DEC:
+ vbi_add_dec(priv, *(char **) arg);
+ return TVI_CONTROL_TRUE;
+ case TV_VBI_CONTROL_DECODE_PAGE:
+ vbi_decode(priv,*(unsigned char**)arg);
+ return TVI_CONTROL_TRUE;
+ case TV_VBI_CONTROL_GET_VBIPAGE:
+ if(!priv->on)
+ return TVI_CONTROL_FALSE;
+ prepare_visible_page(priv);
+ *(void **)arg=priv->display_page;
+ return TVI_CONTROL_TRUE;
+ }
+ return TVI_CONTROL_UNKNOWN;
+}
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