/*****************************************************************************
* 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_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();
vlc_mutex_init( &p_sys->lock );
if( p_sys->p_vbi_dec == NULL )
{
msg_Err( p_dec, "VBI decoder 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;
p_dec->pf_decode_sub = Decode;
return VLC_SUCCESS;
}
static GstFlowReturn
gst_teletextdec_push_page (GstTeletextDec * teletext)
{
GstFlowReturn ret = GST_FLOW_OK;
GstBuffer *buf;
vbi_page page;
page_info *pi;
gint pgno, subno;
gboolean success;
pi = (page_info *) g_queue_pop_head (teletext->queue);
pgno = vbi_bcd2dec (pi->pgno);
subno = vbi_bcd2dec (pi->subno);
GST_INFO_OBJECT (teletext, "Fetching teletext page %03d.%02d", pgno, subno);
success = vbi_fetch_vt_page (teletext->decoder, &page, pi->pgno, pi->subno,
VBI_WST_LEVEL_3p5, 25, FALSE);
if (G_UNLIKELY (!success))
goto fetch_page_failed;
switch (teletext->output_format) {
case GST_TELETEXTDEC_OUTPUT_FORMAT_TEXT:
ret = gst_teletextdec_export_text_page (teletext, &page, &buf);
break;
case GST_TELETEXTDEC_OUTPUT_FORMAT_HTML:
ret = gst_teletextdec_export_html_page (teletext, &page, &buf);
break;
case GST_TELETEXTDEC_OUTPUT_FORMAT_RGBA:
ret = gst_teletextdec_export_rgba_page (teletext, &page, &buf);
break;
case GST_TELETEXTDEC_OUTPUT_FORMAT_PANGO:
ret = gst_teletextdec_export_pango_page (teletext, &page, &buf);
break;
default:
g_assert_not_reached ();
break;
}
vbi_unref_page (&page);
g_free (pi);
if (ret != GST_FLOW_OK)
goto alloc_failed;
GST_BUFFER_TIMESTAMP (buf) = teletext->in_timestamp;
GST_BUFFER_DURATION (buf) = teletext->in_duration;
GST_INFO_OBJECT (teletext, "Pushing buffer of size %d",
GST_BUFFER_SIZE (buf));
ret = gst_pad_push (teletext->srcpad, buf);
if (ret != GST_FLOW_OK)
goto push_failed;
return GST_FLOW_OK;
fetch_page_failed:
{
GST_ELEMENT_ERROR (teletext, RESOURCE, READ, (NULL), (NULL));
return GST_FLOW_ERROR;
}
alloc_failed:
{
GST_ERROR_OBJECT (teletext, "Error allocating output buffer, reason %s",
gst_flow_get_name (ret));
return ret;
}
push_failed:
{
GST_ERROR_OBJECT (teletext, "Pushing buffer failed, reason %s",
gst_flow_get_name (ret));
return ret;
}
}
