static void
gst_teletextdec_zvbi_init (GstTeletextDec * teletext)
{
g_return_if_fail (teletext != NULL);
GST_LOG_OBJECT (teletext, "Initializing structures");
teletext->decoder = vbi_decoder_new ();
vbi_event_handler_register (teletext->decoder,
VBI_EVENT_TTX_PAGE | VBI_EVENT_CAPTION,
gst_teletextdec_event_handler, teletext);
g_mutex_lock (teletext->queue_lock);
teletext->queue = g_queue_new ();
g_mutex_unlock (teletext->queue_lock);
}
/*****************************************************************************
* 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;
if( p_dec->fmt_in.i_codec != VLC_CODEC_TELETEXT )
return VLC_EGENERIC;
p_dec->pf_decode_sub = Decode;
p_sys = p_dec->p_sys = calloc( 1, sizeof(decoder_sys_t) );
if( p_sys == NULL )
return VLC_ENOMEM;
p_sys->i_key[0] = p_sys->i_key[1] = p_sys->i_key[2] = '*' - '0';
p_sys->b_update = false;
p_sys->p_vbi_dec = vbi_decoder_new();
p_sys->p_dvb_demux = vbi_dvb_pes_demux_new( NULL, NULL );
vlc_mutex_init( &p_sys->lock );
if( (p_sys->p_vbi_dec == NULL) || (p_sys->p_dvb_demux == NULL) )
{
msg_Err( p_dec, "VBI decoder/demux could not be created." );
Close( p_this );
return VLC_ENOMEM;
}
/* Some broadcasters in countries with level 1 and level 1.5 still not send a G0 to do
* matches against table 32 of ETSI 300 706. We try to do some best effort guessing
* This is not perfect, but might handle some cases where we know the vbi language
* is known. It would be better if people started sending G0 */
for( int i = 0; ppsz_default_triplet[i] != NULL; i++ )
{
if( p_dec->fmt_in.psz_language && !strcasecmp( p_dec->fmt_in.psz_language, ppsz_default_triplet[i] ) )
{
vbi_teletext_set_default_region( p_sys->p_vbi_dec, pi_default_triplet[i]);
msg_Dbg( p_dec, "overwriting default zvbi region: %d", pi_default_triplet[i] );
}
}
vbi_event_handler_register( p_sys->p_vbi_dec, VBI_EVENT_TTX_PAGE | VBI_EVENT_NETWORK |
#ifdef ZVBI_DEBUG
VBI_EVENT_CAPTION | VBI_EVENT_TRIGGER |
VBI_EVENT_ASPECT | VBI_EVENT_PROG_INFO | VBI_EVENT_NETWORK_ID |
#endif
0 , EventHandler, p_dec );
/* Create the var on vlc_global. */
p_sys->i_wanted_page = var_CreateGetInteger( p_dec, "vbi-page" );
var_AddCallback( p_dec, "vbi-page", RequestPage, p_sys );
/* Check if the Teletext track has a known "initial page". */
if( p_sys->i_wanted_page == 100 && p_dec->fmt_in.subs.teletext.i_magazine != -1 )
{
p_sys->i_wanted_page = 100 * p_dec->fmt_in.subs.teletext.i_magazine +
vbi_bcd2dec( p_dec->fmt_in.subs.teletext.i_page );
var_SetInteger( p_dec, "vbi-page", p_sys->i_wanted_page );
}
p_sys->i_wanted_subpage = VBI_ANY_SUBNO;
p_sys->b_opaque = var_CreateGetBool( p_dec, "vbi-opaque" );
var_AddCallback( p_dec, "vbi-opaque", Opaque, p_sys );
p_sys->i_align = var_CreateGetInteger( p_dec, "vbi-position" );
var_AddCallback( p_dec, "vbi-position", Position, p_sys );
p_sys->b_text = var_CreateGetBool( p_dec, "vbi-text" );
// var_AddCallback( p_dec, "vbi-text", Text, p_sys );
/* Listen for keys */
var_AddCallback( p_dec->p_libvlc, "key-pressed", EventKey, p_dec );
es_format_Init( &p_dec->fmt_out, SPU_ES, VLC_CODEC_SPU );
if( p_sys->b_text )
p_dec->fmt_out.video.i_chroma = VLC_CODEC_TEXT;
else
p_dec->fmt_out.video.i_chroma = VLC_CODEC_RGBA;
return VLC_SUCCESS;
}
int main(int argc, char **argv)
{
int region = -1;
const char *device = default_device;
int opt;
enum {
OPT_DUMMY = CHAR_MAX,
OPT_VERSION
};
static struct option long_options[] = {
{"help", no_argument, NULL, 'h'},
{"version", no_argument, NULL, OPT_VERSION},
{NULL, 0, NULL, 0}
};
while ((opt = getopt_long(argc, argv, "d:l:h", long_options, NULL)) != -1)
switch (opt)
{
case 'd':
device = optarg;
break;
case 'l':
region = dochttx_region_for_lang(optarg);
if (region < 0) {
errno = EINVAL;
perror("dochttx: -l");
exit(EXIT_FAILURE);
}
break;
case 'h':
long_usage(stdout);
exit(EXIT_SUCCESS);
case OPT_VERSION:
print_version();
exit(EXIT_SUCCESS);
default: /* '?' */
usage(stderr);
exit(EXIT_FAILURE);
}
if (optind != argc) {
usage(stderr);
exit(EXIT_FAILURE);
}
int rc = dochttx_locale_init();
if (rc < 0) {
perror("dochttx: locale initialization failed");
return EXIT_FAILURE;
}
if (region < 0)
region = dochttx_region_for_locale();
if (region < 0)
region = dochttx_region_for_lang("en");
assert(region >= 0);
struct dochttx_vbi_state* vbi = dochttx_vbi_open(device, region);
if (vbi == NULL)
return EXIT_FAILURE;
dochttx_ncurses_init();
mvvline(0, 41, ACS_VLINE, 25);
for (int y = 0; y < 25; y++)
mvhline(y, 0, ACS_BOARD, 41);
mvhline(25, 0, ACS_HLINE, COLS);
mvaddch(25, 41, ACS_BTEE);
vbi_event_handler_register(vbi->dec, VBI_EVENT_TTX_PAGE, on_event_ttx_page, NULL);
vbi_pgno req_pgno = 0x100;
vbi_subno req_subno = VBI_ANY_SUBNO;
draw_looking_for(req_pgno, req_subno);
bool req_drawn = false;
struct input input = {
.text = {0},
.position = 0,
.status = INPUT_NORMAL,
};
draw_input(&input);
refresh();
while (true) {
struct pollfd fds[2] = {
{ .fd = STDIN_FILENO, .events = POLLIN },
{ .fd = vbi->fd, .events = POLLIN, .revents = POLLIN },
};
/**
* @param vbi Initialized vbi decoding context.
* @param handler Event handler function.
* @param user_data Pointer passed to the handler.
*
* Unregisters an event handler.
*
* Apart of removing a handler this function also disables decoding
* of data services when no handler is registered to consume the
* respective data. Removing the last @c VBI_EVENT_TTX_PAGE handler for
* example disables Teletext decoding.
*
* This function can be safely called at any time, even from a handler
* removing itself or another handler, and regardless if the @a handler
* has been successfully registered.
**/
void
vbi_event_handler_unregister(vbi_decoder *vbi,
vbi_event_handler handler, void *user_data)
{
vbi_event_handler_register(vbi, 0, handler, user_data);
}
