+++ /dev/null
-/*****************************************************************************
- * telx.c : Minimalistic Teletext subtitles decoder
- *****************************************************************************
- * Copyright (C) 2007 Vincent Penne
- * Some code converted from ProjectX java dvb decoder (c) 2001-2005 by dvb.matt
- * $Id$
- *
- * 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 2 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, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
- *****************************************************************************/
-/*****************************************************************************
- *
- * information on teletext format can be found here :
- * http://pdc.ro.nu/teletext.html
- *
- *****************************************************************************/
-#include <vlc/vlc.h>
-#include <assert.h>
-#include <stdint.h>
-
-#include "vlc_vout.h"
-#include "vlc_bits.h"
-#include "vlc_codec.h"
-
-/* #define TELX_DEBUG */
-#ifdef TELX_DEBUG
-# define dbg( a ) msg_Dbg a
-#else
-# define dbg( a )
-#endif
-
-/*****************************************************************************
- * Module descriptor.
- *****************************************************************************/
-static int Open ( vlc_object_t * );
-static void Close( vlc_object_t * );
-static subpicture_t *Decode( decoder_t *, block_t ** );
-
-#define OVERRIDE_PAGE_TEXT N_("Override page")
-#define OVERRIDE_PAGE_LONGTEXT N_("Override the indicated page, try this if " \
- "your subtitles don't appear (-1 = autodetect from TS, " \
- "0 = autodetect from teletext, " \
- ">0 = actual page number, usually 888 or 889).")
-
-#define IGNORE_SUB_FLAG_TEXT N_("Ignore subtitle flag")
-#define IGNORE_SUB_FLAG_LONGTEXT N_("Ignore the subtitle flag, try this if " \
- "your subtitles don't appear.")
-
-#define FRENCH_WORKAROUND_TEXT N_("Workaround for France")
-#define FRENCH_WORKAROUND_LONGTEXT N_("Some French channels do not flag " \
- "their subtitling pages correctly due to a historical " \
- "interpretation mistake. Try using this wrong interpretation if " \
- "your subtitles don't appear.")
-
-vlc_module_begin();
- set_description( _("Teletext subtitles decoder") );
- set_shortname( "Teletext" );
- set_capability( "decoder", 50 );
- set_category( CAT_INPUT );
- set_subcategory( SUBCAT_INPUT_SCODEC );
- set_callbacks( Open, Close );
-
- add_integer( "telx-override-page", -1, NULL,
- OVERRIDE_PAGE_TEXT, OVERRIDE_PAGE_LONGTEXT, VLC_TRUE );
- add_bool( "telx-ignore-subtitle-flag", 0, NULL,
- IGNORE_SUB_FLAG_TEXT, IGNORE_SUB_FLAG_LONGTEXT, VLC_TRUE );
- add_bool( "telx-french-workaround", 0, NULL,
- FRENCH_WORKAROUND_TEXT, FRENCH_WORKAROUND_LONGTEXT, VLC_TRUE );
-
-vlc_module_end();
-
-/****************************************************************************
- * Local structures
- ****************************************************************************/
-
-struct decoder_sys_t
-{
- int i_align;
- vlc_bool_t b_is_subtitle[9];
- char ppsz_lines[32][128];
- char psz_prev_text[512];
- mtime_t prev_pts;
- int i_page[9];
- vlc_bool_t b_erase[9];
- uint16_t * pi_active_national_set[9];
- int i_wanted_page, i_wanted_magazine;
- vlc_bool_t b_ignore_sub_flag;
-};
-
-/****************************************************************************
- * Local data
- ****************************************************************************/
-
-/*
- * My doc only mentions 13 national characters, but experiments show there
- * are more, in france for example I already found two more (0x9 and 0xb).
- *
- * Conversion is in this order :
- *
- * 0x23 0x24 0x40 0x5b 0x5c 0x5d 0x5e 0x5f 0x60 0x7b 0x7c 0x7d 0x7e
- * (these are the standard ones)
- * 0x08 0x09 0x0a 0x0b 0x0c 0x0d (apparently a control character) 0x0e 0x0f
- */
-
-static uint16_t ppi_national_subsets[][20] =
-{
- { 0x00a3, 0x0024, 0x0040, 0x00ab, 0x00bd, 0x00bb, 0x005e, 0x0023,
- 0x002d, 0x00bc, 0x00a6, 0x00be, 0x00f7 }, /* english ,000 */
-
- { 0x00e9, 0x00ef, 0x00e0, 0x00eb, 0x00ea, 0x00f9, 0x00ee, 0x0023,
- 0x00e8, 0x00e2, 0x00f4, 0x00fb, 0x00e7, 0, 0x00eb, 0, 0x00ef }, /* french ,001 */
-
- { 0x0023, 0x00a4, 0x00c9, 0x00c4, 0x00d6, 0x00c5, 0x00dc, 0x005f,
- 0x00e9, 0x00e4, 0x00f6, 0x00e5, 0x00fc }, /* swedish,finnish,hungarian ,010 */
-
- { 0x0023, 0x016f, 0x010d, 0x0165, 0x017e, 0x00fd, 0x00ed, 0x0159,
- 0x00e9, 0x00e1, 0x0115, 0x00fa, 0x0161 }, /* czech,slovak ,011 */
-
- { 0x0023, 0x0024, 0x00a7, 0x00c4, 0x00d6, 0x00dc, 0x005e, 0x005f,
- 0x00b0, 0x00e4, 0x00f6, 0x00fc, 0x00df }, /* german ,100 */
-
- { 0x00e7, 0x0024, 0x00a1, 0x00e1, 0x00e9, 0x00ed, 0x00f3, 0x00fa,
- 0x00bf, 0x00fc, 0x00f1, 0x00e8, 0x00e0 }, /* portuguese,spanish ,101 */
-
- { 0x00a3, 0x0024, 0x00e9, 0x00b0, 0x00e7, 0x00bb, 0x005e, 0x0023,
- 0x00f9, 0x00e0, 0x00f2, 0x00e8, 0x00ec }, /* italian ,110 */
-
- { 0x0023, 0x00a4, 0x0162, 0x00c2, 0x015e, 0x0102, 0x00ce, 0x0131,
- 0x0163, 0x00e2, 0x015f, 0x0103, 0x00ee }, /* rumanian ,111 */
-
- /* I have these tables too, but I don't know how they can be triggered */
- { 0x0023, 0x0024, 0x0160, 0x0117, 0x0119, 0x017d, 0x010d, 0x016b,
- 0x0161, 0x0105, 0x0173, 0x017e, 0x012f }, /* lettish,lithuanian ,1000 */
-
- { 0x0023, 0x0144, 0x0105, 0x005a, 0x015a, 0x0141, 0x0107, 0x00f3,
- 0x0119, 0x017c, 0x015b, 0x0142, 0x017a }, /* polish, 1001 */
-
- { 0x0023, 0x00cb, 0x010c, 0x0106, 0x017d, 0x0110, 0x0160, 0x00eb,
- 0x010d, 0x0107, 0x017e, 0x0111, 0x0161 }, /* serbian,croatian,slovenian, 1010 */
-
- { 0x0023, 0x00f5, 0x0160, 0x00c4, 0x00d6, 0x017e, 0x00dc, 0x00d5,
- 0x0161, 0x00e4, 0x00f6, 0x017e, 0x00fc }, /* estonian ,1011 */
-
- { 0x0054, 0x011f, 0x0130, 0x015e, 0x00d6, 0x00c7, 0x00dc, 0x011e,
- 0x0131, 0x015f, 0x00f6, 0x00e7, 0x00fc }, /* turkish ,1100 */
-};
-
-
-/*****************************************************************************
- * Open: probe the decoder and return score
- *****************************************************************************
- * Tries to launch a decoder and return score so that the interface is able
- * to chose.
- *****************************************************************************/
-static int Open( vlc_object_t *p_this )
-{
- decoder_t *p_dec = (decoder_t *) p_this;
- decoder_sys_t *p_sys = NULL;
- vlc_value_t val;
- int i;
-
- if( p_dec->fmt_in.i_codec != VLC_FOURCC('t','e','l','x'))
- {
- return VLC_EGENERIC;
- }
-
- p_dec->pf_decode_sub = Decode;
- p_sys = p_dec->p_sys = malloc( sizeof(decoder_sys_t) );
- if( p_sys == NULL )
- {
- msg_Err( p_dec, "out of memory" );
- return VLC_ENOMEM;
- }
-
-
- memset( p_sys, 0, sizeof(decoder_sys_t) );
-
- p_sys->i_align = 0;
- for ( i = 0; i < 9; i++ )
- p_sys->pi_active_national_set[i] = ppi_national_subsets[1];
-
- var_Create( p_dec, "telx-override-page",
- VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
- var_Get( p_dec, "telx-override-page", &val );
- if( val.i_int == -1 && p_dec->fmt_in.subs.dvb.i_id != -1 )
- {
- p_sys->i_wanted_magazine = p_dec->fmt_in.subs.dvb.i_id >> 16;
- if( p_sys->i_wanted_magazine == 0 )
- p_sys->i_wanted_magazine = 8;
- p_sys->i_wanted_page = p_dec->fmt_in.subs.dvb.i_id & 0xff;
-
- var_Create( p_dec, "telx-french-workaround",
- VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
- var_Get( p_dec, "telx-french-workaround", &val );
- if( p_sys->i_wanted_page < 100 &&
- (val.b_bool || (p_sys->i_wanted_page % 16) >= 10))
- {
- /* See http://www.nada.kth.se/~ragge/vdr/ttxtsubs/TROUBLESHOOTING.txt
- * paragraph about French channels - they mix up decimal and
- * hexadecimal */
- p_sys->i_wanted_page = (p_sys->i_wanted_page / 10) * 16 +
- (p_sys->i_wanted_page % 10);
- }
- }
- else if( val.i_int <= 0 )
- {
- p_sys->i_wanted_magazine = -1;
- p_sys->i_wanted_page = -1;
- }
- else
- {
- p_sys->i_wanted_magazine = val.i_int / 100;
- p_sys->i_wanted_page = (((val.i_int % 100) / 10) << 4)
- | ((val.i_int % 100) % 10);
- }
- var_Create( p_dec, "telx-ignore-subtitle-flag",
- VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
- var_Get( p_dec, "telx-ignore-subtitle-flag", &val );
- p_sys->b_ignore_sub_flag = val.b_bool;
-
- msg_Dbg( p_dec, "starting telx on magazine %d page %x flag %d",
- p_sys->i_wanted_magazine, p_sys->i_wanted_page,
- p_sys->b_ignore_sub_flag );
-
- return VLC_SUCCESS;
-
-/* error: */
-/* if (p_sys) { */
-/* free(p_sys); */
-/* p_sys = NULL; */
-/* } */
-/* return VLC_EGENERIC; */
-}
-
-/*****************************************************************************
- * Close:
- *****************************************************************************/
-static void Close( vlc_object_t *p_this )
-{
- decoder_t *p_dec = (decoder_t*) p_this;
- decoder_sys_t *p_sys = p_dec->p_sys;
-
- free( p_sys );
-}
-
-/**************************
- * change bits endianness *
- **************************/
-static uint8_t bytereverse( int n )
-{
- n = (((n >> 1) & 0x55) | ((n << 1) & 0xaa));
- n = (((n >> 2) & 0x33) | ((n << 2) & 0xcc));
- n = (((n >> 4) & 0x0f) | ((n << 4) & 0xf0));
- return n;
-}
-
-static int hamming_8_4( int a )
-{
- switch (a) {
- case 0xA8:
- return 0;
- case 0x0B:
- return 1;
- case 0x26:
- return 2;
- case 0x85:
- return 3;
- case 0x92:
- return 4;
- case 0x31:
- return 5;
- case 0x1C:
- return 6;
- case 0xBF:
- return 7;
- case 0x40:
- return 8;
- case 0xE3:
- return 9;
- case 0xCE:
- return 10;
- case 0x6D:
- return 11;
- case 0x7A:
- return 12;
- case 0xD9:
- return 13;
- case 0xF4:
- return 14;
- case 0x57:
- return 15;
- default:
- return -1; // decoding error , not yet corrected
- }
-}
-
-// utc-2 --> utf-8
-// this is not a general function, but it's enough for what we do here
-// the result buffer need to be at least 4 bytes long
-static void to_utf8( char * res, uint16_t ch )
-{
- if( ch >= 0x80 )
- {
- if( ch >= 0x800 )
- {
- res[0] = (ch >> 12) | 0xE0;
- res[1] = ((ch >> 6) & 0x3F) | 0x80;
- res[2] = (ch & 0x3F) | 0x80;
- res[3] = 0;
- }
- else
- {
- res[0] = (ch >> 6) | 0xC0;
- res[1] = (ch & 0x3F) | 0x80;
- res[2] = 0;
- }
- }
- else
- {
- res[0] = ch;
- res[1] = 0;
- }
-}
-
-static void decode_string( char * res, int res_len,
- decoder_sys_t *p_sys, int magazine,
- uint8_t * packet, int len )
-{
- char utf8[7];
- char * pt = res;
- int i;
-
- for ( i = 0; i < len; i++ )
- {
- int in = bytereverse( packet[i] ) & 0x7f;
- uint16_t out = 32;
- size_t l;
-
- switch ( in )
- {
- /* special national characters */
- case 0x23:
- out = p_sys->pi_active_national_set[magazine][0];
- break;
- case 0x24:
- out = p_sys->pi_active_national_set[magazine][1];
- break;
- case 0x40:
- out = p_sys->pi_active_national_set[magazine][2];
- break;
- case 0x5b:
- out = p_sys->pi_active_national_set[magazine][3];
- break;
- case 0x5c:
- out = p_sys->pi_active_national_set[magazine][4];
- break;
- case 0x5d:
- out = p_sys->pi_active_national_set[magazine][5];
- break;
- case 0x5e:
- out = p_sys->pi_active_national_set[magazine][6];
- break;
- case 0x5f:
- out = p_sys->pi_active_national_set[magazine][7];
- break;
- case 0x60:
- out = p_sys->pi_active_national_set[magazine][8];
- break;
- case 0x7b:
- out = p_sys->pi_active_national_set[magazine][9];
- break;
- case 0x7c:
- out = p_sys->pi_active_national_set[magazine][10];
- break;
- case 0x7d:
- out = p_sys->pi_active_national_set[magazine][11];
- break;
- case 0x7e:
- out = p_sys->pi_active_national_set[magazine][12];
- break;
-
- /* some special control characters (empirical) */
- case 0x0d:
- /* apparently this starts a sequence that ends with 0xb 0xb */
- while ( i + 1 < len && (bytereverse( packet[i+1] ) & 0x7f) != 0x0b )
- i++;
- i += 2;
- break;
- /* goto skip; */
-
- default:
- /* non documented national range 0x08 - 0x0f */
- if ( in >= 0x08 && in <= 0x0f )
- {
- out = p_sys->pi_active_national_set[magazine][13 + in - 8];
- break;
- }
-
- /* normal ascii */
- if ( in > 32 && in < 0x7f )
- out = in;
- }
-
- /* handle undefined national characters */
- if ( out == 0 )
- out = 32;
-
- /* convert to utf-8 */
- to_utf8( utf8, out );
- l = strlen( utf8 );
- if ( pt + l < res + res_len - 1 )
- {
- strcpy(pt, utf8);
- pt += l;
- }
-
- /* skip: ; */
- }
- /* end: */
- *pt++ = 0;
-}
-
-/*****************************************************************************
- * Decode:
- *****************************************************************************/
-static subpicture_t *Decode( decoder_t *p_dec, block_t **pp_block )
-{
- decoder_sys_t *p_sys = p_dec->p_sys;
- block_t *p_block;
- subpicture_t *p_spu = NULL;
- video_format_t fmt;
- /* int erase = 0; */
- int len, offset;
-#if 0
- int i_wanted_magazine = i_conf_wanted_page / 100;
- int i_wanted_page = 0x10 * ((i_conf_wanted_page % 100) / 10)
- | (i_conf_wanted_page % 10);
-#endif
- vlc_bool_t b_update = VLC_FALSE;
- char psz_text[512], *pt = psz_text;
- char psz_line[256];
- int i, total;
-
- if( pp_block == NULL || *pp_block == NULL ) return NULL;
- p_block = *pp_block;
- *pp_block = NULL;
-
- dbg((p_dec, "start of telx packet with header %2x\n",
- * (uint8_t *) p_block->p_buffer));
- len = p_block->i_buffer;
- for ( offset = 1; offset + 46 <= len; offset += 46 )
- {
- uint8_t * packet = (uint8_t *) p_block->p_buffer+offset;
-// int vbi = ((0x20 & packet[2]) != 0 ? 0 : 313) + (0x1F & packet[2]);
-
-// dbg((p_dec, "vbi %d header %02x %02x %02x\n", vbi, packet[0], packet[1], packet[2]));
- if ( packet[0] == 0xFF ) continue;
-
-/* if (packet[1] != 0x2C) { */
-/* printf("wrong header\n"); */
-/* //goto error; */
-/* continue; */
-/* } */
-
- int mpag = (hamming_8_4( packet[4] ) << 4) | hamming_8_4( packet[5] );
- int row, magazine;
- if ( mpag < 0 )
- {
- /* decode error */
- dbg((p_dec, "mpag hamming error\n"));
- continue;
- }
-
- row = 0xFF & bytereverse(mpag);
- magazine = (7 & row) == 0 ? 8 : (7 & row);
- row >>= 3;
-
- if ( p_sys->i_wanted_page != -1
- && magazine != p_sys->i_wanted_magazine )
- continue;
-
- if ( row == 0 )
- {
- /* row 0 : flags and header line */
- int flag = 0;
- int a;
-
- for ( a = 0; a < 6; a++ )
- {
- flag |= (0xF & (bytereverse( hamming_8_4(packet[8 + a]) ) >> 4))
- << (a * 4);
- }
-
- /* if (!p_sys->b_ignore_sub_flag && !(1 & flag>>15)) */
- /* continue; */
-
- p_sys->i_page[magazine] = (0xF0 & bytereverse( hamming_8_4(packet[7]) )) |
- (0xF & (bytereverse( hamming_8_4(packet[6]) ) >> 4) );
-
- decode_string( psz_line, sizeof(psz_line), p_sys, magazine,
- packet + 14, 40 - 14 );
-
- dbg((p_dec, "mag %d flags %x page %x character set %d subtitles %d", magazine, flag,
- p_sys->i_page[magazine],
- 7 & flag>>21, 1 & flag>>15, psz_line));
-
- p_sys->pi_active_national_set[magazine] =
- ppi_national_subsets[7 & (flag >> 21)];
-
- p_sys->b_is_subtitle[magazine] = p_sys->b_ignore_sub_flag
- || ( (1 & (flag >> 15))
- && (1 & (flag>>16)) );
-
- dbg(( p_dec, "FLAGS%s%s%s%s%s%s%s mag_ser %d",
- (1 & (flag>>14))? " news" : "",
- (1 & (flag>>15))? " subtitle" : "",
- (1 & (flag>>7))? " erase" : "",
- (1 & (flag>>16))? " suppressed_head" : "",
- (1 & (flag>>17))? " update" : "",
- (1 & (flag>>18))? " interrupt" : "",
- (1 & (flag>>19))? " inhibit" : "",
- (1 & (flag>>20)) ));
-
- if ( (p_sys->i_wanted_page != -1
- && p_sys->i_page[magazine] != p_sys->i_wanted_page)
- || !p_sys->b_is_subtitle[magazine] )
- continue;
-
- p_sys->b_erase[magazine] = (1 & (flag >> 7));
-
- dbg((p_dec, "%ld --> %ld\n", (long int) p_block->i_pts, (long int)(p_sys->prev_pts+1500000)));
- /* kludge here :
- * we ignore the erase flag if it happens less than 1.5 seconds
- * before last caption
- * TODO make this time configurable
- * UPDATE the kludge seems to be no more necessary
- * so it's commented out*/
- if ( /*p_block->i_pts > p_sys->prev_pts + 1500000 && */
- p_sys->b_erase[magazine] )
- {
- int i;
-
- dbg((p_dec, "ERASE !\n"));
-
- p_sys->b_erase[magazine] = 0;
- for ( i = 1; i < 32; i++ )
- {
- if ( !p_sys->ppsz_lines[i][0] ) continue;
- /* b_update = VLC_TRUE; */
- p_sys->ppsz_lines[i][0] = 0;
- }
- }
-
- /* replace the row if it's different */
- if ( strcmp(psz_line, p_sys->ppsz_lines[row]) )
- {
- strncpy( p_sys->ppsz_lines[row], psz_line,
- sizeof(p_sys->ppsz_lines[row]) - 1);
- }
- b_update = VLC_TRUE;
-
- }
- else if ( row < 24 )
- {
- char * t;
- int i;
- /* row 1-23 : normal lines */
-
- if ( (p_sys->i_wanted_page != -1
- && p_sys->i_page[magazine] != p_sys->i_wanted_page)
- || !p_sys->b_is_subtitle[magazine]
- || (p_sys->i_wanted_page == -1
- && p_sys->i_page[magazine] > 0x99) )
- continue;
-
- decode_string( psz_line, sizeof(psz_line), p_sys, magazine,
- packet + 6, 40 );
- t = psz_line;
-
- /* remove starting spaces */
- while ( *t == 32 ) t++;
-
- /* remove trailing spaces */
- for ( i = strlen(t) - 1; i >= 0 && t[i] == 32; i-- );
- t[i + 1] = 0;
-
- /* replace the row if it's different */
- if ( strcmp( t, p_sys->ppsz_lines[row] ) )
- {
- strncpy( p_sys->ppsz_lines[row], t,
- sizeof(p_sys->ppsz_lines[row]) - 1 );
- b_update = VLC_TRUE;
- }
-
- if (t[0])
- p_sys->prev_pts = p_block->i_pts;
-
- dbg((p_dec, "%d %d : ", magazine, row));
- dbg((p_dec, "%s\n", t));
-
-#ifdef TELX_DEBUG
- {
- char dbg[256];
- dbg[0] = 0;
- for ( i = 0; i < 40; i++ )
- {
- int in = bytereverse(packet[6 + i]) & 0x7f;
- sprintf(dbg + strlen(dbg), "%02x ", in);
- }
- dbg((p_dec, "%s\n", dbg));
- dbg[0] = 0;
- for ( i = 0; i < 40; i++ )
- {
- decode_string( psz_line, sizeof(psz_line), p_sys, magazine,
- packet + 6 + i, 1 );
- sprintf( dbg + strlen(dbg), "%s ", psz_line );
- }
- dbg((p_dec, "%s\n", dbg));
- }
-#endif
-
- }
- else if ( row == 25 )
- {
- /* row 25 : alternate header line */
- if ( (p_sys->i_wanted_page != -1
- && p_sys->i_page[magazine] != p_sys->i_wanted_page)
- || !p_sys->b_is_subtitle[magazine] )
- continue;
-
- decode_string( psz_line, sizeof(psz_line), p_sys, magazine,
- packet + 6, 40 );
-
- /* replace the row if it's different */
- if ( strcmp( psz_line, p_sys->ppsz_lines[0] ) )
- {
- strncpy( p_sys->ppsz_lines[0], psz_line,
- sizeof(p_sys->ppsz_lines[0]) - 1 );
- /* b_update = VLC_TRUE; */
- }
- }
-/* else if (row == 26) { */
-/* // row 26 : TV listings */
-/* } else */
-/* dbg((p_dec, "%d %d : %s\n", magazine, row, decode_string(p_sys, magazine, packet+6, 40))); */
- }
-
- if ( !b_update )
- goto error;
-
- total = 0;
- for ( i = 1; i < 24; i++ )
- {
- size_t l = strlen( p_sys->ppsz_lines[i] );
-
- if ( l > sizeof(psz_text) - total - 1 )
- l = sizeof(psz_text) - total - 1;
-
- if ( l > 0 )
- {
- memcpy( pt, p_sys->ppsz_lines[i], l );
- total += l;
- pt += l;
- if ( sizeof(psz_text) - total - 1 > 0 )
- {
- *pt++ = '\n';
- total++;
- }
- }
- }
- *pt = 0;
-
- if ( !strcmp(psz_text, p_sys->psz_prev_text) )
- goto error;
-
- dbg((p_dec, "UPDATE TELETEXT PICTURE\n"));
-
- assert( sizeof(p_sys->psz_prev_text) >= sizeof(psz_text) );
- strcpy( p_sys->psz_prev_text, psz_text );
-
- /* Create the subpicture unit */
- p_spu = p_dec->pf_spu_buffer_new( p_dec );
- if( !p_spu )
- {
- msg_Warn( p_dec, "can't get spu buffer" );
- goto error;
- }
-
- /* Create a new subpicture region */
- memset( &fmt, 0, sizeof(video_format_t) );
- fmt.i_chroma = VLC_FOURCC('T','E','X','T');
- fmt.i_aspect = 0;
- fmt.i_width = fmt.i_height = 0;
- fmt.i_x_offset = fmt.i_y_offset = 0;
- p_spu->p_region = p_spu->pf_create_region( VLC_OBJECT(p_dec), &fmt );
- if( p_spu->p_region == NULL )
- {
- msg_Err( p_dec, "cannot allocate SPU region" );
- goto error;
- }
-
- /* Normal text subs, easy markup */
- p_spu->p_region->i_align = SUBPICTURE_ALIGN_BOTTOM | p_sys->i_align;
- p_spu->i_x = p_sys->i_align ? 20 : 0;
- p_spu->i_y = 10;
-
- p_spu->p_region->psz_text = strdup(psz_text);
- p_spu->i_start = p_block->i_pts;
- p_spu->i_stop = p_block->i_pts + p_block->i_length;
- p_spu->b_ephemer = (p_block->i_length == 0);
- p_spu->b_absolute = VLC_FALSE;
- p_spu->b_pausable = VLC_TRUE;
- dbg((p_dec, "%ld --> %ld\n", (long int) p_block->i_pts/100000, (long int)p_block->i_length/100000));
-
- block_Release( p_block );
- return p_spu;
-
-error:
- if ( p_spu != NULL )
- {
- p_dec->pf_spu_buffer_del( p_dec, p_spu );
- p_spu = NULL;
- }
-
- block_Release( p_block );
- return NULL;
-}
-
projects / vlc / commitdiff