static GstFlowReturn
gst_teletextdec_export_rgba_page (GstTeletextDec * teletext, vbi_page * page,
GstBuffer ** buf)
{
guint size;
GstCaps *caps, *out_caps;
GstFlowReturn ret;
gint width, height;
GstPadTemplate *templ;
/* one character occupies 12 x 10 pixels */
width = page->columns * 12;
height = page->rows * 10;
caps = gst_caps_new_simple ("video/x-raw-rgb",
"width", G_TYPE_INT, width,
"height", G_TYPE_INT, height,
"framerate", GST_TYPE_FRACTION, teletext->rate_numerator,
teletext->rate_denominator, NULL);
templ = gst_static_pad_template_get (&src_template);
out_caps = gst_caps_intersect (caps, gst_pad_template_get_caps (templ));
gst_caps_unref (caps);
gst_object_unref (templ);
size = (guint) width *(guint) height *sizeof (vbi_rgba);
ret = gst_pad_alloc_buffer_and_set_caps (teletext->srcpad,
GST_BUFFER_OFFSET_NONE, size, out_caps, &(*buf));
if (ret == GST_FLOW_OK) {
GST_DEBUG_OBJECT (teletext, "Creating image with %d rows and %d cols",
page->rows, page->columns);
vbi_draw_vt_page (page, VBI_PIXFMT_RGBA32_LE,
(vbi_rgba *) GST_BUFFER_DATA (*buf), FALSE, TRUE);
}
gst_caps_unref (out_caps);
return ret;
}
/*****************************************************************************
* 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;
bool b_cached = false;
vbi_page p_page;
const uint8_t *p_pos;
unsigned int i_left;
if( (pp_block == NULL) || (*pp_block == NULL) )
return NULL;
p_block = *pp_block;
*pp_block = NULL;
p_pos = p_block->p_buffer;
i_left = p_block->i_buffer;
while( i_left > 0 )
{
vbi_sliced p_sliced[MAX_SLICES];
unsigned int i_lines = 0;
int64_t i_pts;
i_lines = vbi_dvb_demux_cor( p_sys->p_dvb_demux, p_sliced,
MAX_SLICES, &i_pts, &p_pos, &i_left );
if( i_lines > 0 )
vbi_decode( p_sys->p_vbi_dec, p_sliced, i_lines, i_pts / 90000.0 );
}
/* */
vlc_mutex_lock( &p_sys->lock );
const int i_align = p_sys->i_align;
const unsigned int i_wanted_page = p_sys->i_wanted_page;
const unsigned int i_wanted_subpage = p_sys->i_wanted_subpage;
const bool b_opaque = p_sys->b_opaque;
vlc_mutex_unlock( &p_sys->lock );
/* Try to see if the page we want is in the cache yet */
memset( &p_page, 0, sizeof(vbi_page) );
b_cached = vbi_fetch_vt_page( p_sys->p_vbi_dec, &p_page,
vbi_dec2bcd( i_wanted_page ),
i_wanted_subpage, VBI_WST_LEVEL_3p5,
25, true );
if( i_wanted_page == p_sys->i_last_page && !p_sys->b_update )
goto error;
if( !b_cached )
{
if( p_sys->i_last_page != i_wanted_page )
{
/* We need to reset the subtitle */
p_spu = Subpicture( p_dec, &fmt, true,
p_page.columns, p_page.rows,
i_align, p_block->i_pts );
if( !p_spu )
goto error;
p_spu->p_region->psz_text = strdup("");
p_sys->b_update = true;
p_sys->i_last_page = i_wanted_page;
goto exit;
}
goto error;
}
p_sys->b_update = false;
p_sys->i_last_page = i_wanted_page;
#ifdef ZVBI_DEBUG
msg_Dbg( p_dec, "we now have page: %d ready for display",
i_wanted_page );
#endif
/* If there is a page or sub to render, then we do that here */
/* Create the subpicture unit */
p_spu = Subpicture( p_dec, &fmt, p_sys->b_text,
p_page.columns, p_page.rows,
i_align, p_block->i_pts );
if( !p_spu )
goto error;
if( p_sys->b_text )
{
unsigned int i_textsize = 7000;
int i_total;
char p_text[i_textsize+1];
i_total = vbi_print_page_region( &p_page, p_text, i_textsize,
"UTF-8", 0, 0, 0, 0, p_page.columns, p_page.rows );
p_text[i_total] = '\0';
/* Strip off the pagenumber */
if( i_total <= 40 )
goto error;
p_spu->p_region->psz_text = strdup( &p_text[8] );
#ifdef ZVBI_DEBUG
msg_Info( p_dec, "page %x-%x(%d)\n%s", p_page.pgno, p_page.subno, i_total, p_text );
#endif
}
else
{
picture_t *p_pic = p_spu->p_region->p_picture;
/* ZVBI is stupid enough to assume pitch == width */
p_pic->p->i_pitch = 4 * fmt.i_width;
vbi_draw_vt_page( &p_page, ZVBI_PIXFMT_RGBA32,
p_spu->p_region->p_picture->p->p_pixels, 1, 1 );
vlc_mutex_lock( &p_sys->lock );
memcpy( p_sys->nav_link, &p_page.nav_link, sizeof( p_sys->nav_link )) ;
vlc_mutex_unlock( &p_sys->lock );
OpaquePage( p_pic, p_page, fmt, b_opaque );
}
exit:
vbi_unref_page( &p_page );
block_Release( p_block );
return p_spu;
error:
vbi_unref_page( &p_page );
if( p_spu != NULL )
{
decoder_DeleteSubpicture( p_dec, p_spu );
p_spu = NULL;
}
block_Release( p_block );
return NULL;
}
/*****************************************************************************
* 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;
bool b_cached = false;
vbi_page p_page;
if( (pp_block == NULL) || (*pp_block == NULL) )
return NULL;
p_block = *pp_block;
*pp_block = NULL;
if( p_block->i_buffer > 0 &&
( ( p_block->p_buffer[0] >= 0x10 && p_block->p_buffer[0] <= 0x1f ) ||
( p_block->p_buffer[0] >= 0x99 && p_block->p_buffer[0] <= 0x9b ) ) )
{
vbi_sliced *p_sliced = p_sys->p_vbi_sliced;
unsigned int i_lines = 0;
p_block->i_buffer--;
p_block->p_buffer++;
while( p_block->i_buffer >= 2 )
{
int i_id = p_block->p_buffer[0];
unsigned i_size = p_block->p_buffer[1];
if( 2 + i_size > p_block->i_buffer )
break;
if( ( i_id == 0x02 || i_id == 0x03 ) && i_size >= 44 && i_lines < MAX_SLICES )
{
unsigned line_offset = p_block->p_buffer[2] & 0x1f;
unsigned field_parity = p_block->p_buffer[2] & 0x20;
p_sliced[i_lines].id = VBI_SLICED_TELETEXT_B;
if( line_offset > 0 )
p_sliced[i_lines].line = line_offset + (field_parity ? 0 : 313);
else
p_sliced[i_lines].line = 0;
for( int i = 0; i < 42; i++ )
p_sliced[i_lines].data[i] = vbi_rev8( p_block->p_buffer[4 + i] );
i_lines++;
}
p_block->i_buffer -= 2 + i_size;
p_block->p_buffer += 2 + i_size;
}
if( i_lines > 0 )
vbi_decode( p_sys->p_vbi_dec, p_sliced, i_lines, (double)p_block->i_pts / 1000000 );
}
/* */
vlc_mutex_lock( &p_sys->lock );
const int i_align = p_sys->i_align;
const unsigned int i_wanted_page = p_sys->i_wanted_page;
const unsigned int i_wanted_subpage = p_sys->i_wanted_subpage;
const bool b_opaque = p_sys->b_opaque;
vlc_mutex_unlock( &p_sys->lock );
/* Try to see if the page we want is in the cache yet */
memset( &p_page, 0, sizeof(vbi_page) );
b_cached = vbi_fetch_vt_page( p_sys->p_vbi_dec, &p_page,
vbi_dec2bcd( i_wanted_page ),
i_wanted_subpage, VBI_WST_LEVEL_3p5,
25, true );
if( i_wanted_page == p_sys->i_last_page && !p_sys->b_update )
goto error;
if( !b_cached )
{
if( p_sys->i_last_page != i_wanted_page )
{
/* We need to reset the subtitle */
p_spu = Subpicture( p_dec, &fmt, true,
p_page.columns, p_page.rows,
i_align, p_block->i_pts );
if( !p_spu )
goto error;
p_spu->p_region->psz_text = strdup("");
p_sys->b_update = true;
p_sys->i_last_page = i_wanted_page;
goto exit;
}
goto error;
}
p_sys->b_update = false;
p_sys->i_last_page = i_wanted_page;
#ifdef ZVBI_DEBUG
msg_Dbg( p_dec, "we now have page: %d ready for display",
i_wanted_page );
#endif
/* If there is a page or sub to render, then we do that here */
/* Create the subpicture unit */
p_spu = Subpicture( p_dec, &fmt, p_sys->b_text,
p_page.columns, p_page.rows,
i_align, p_block->i_pts );
if( !p_spu )
goto error;
if( p_sys->b_text )
{
unsigned int i_textsize = 7000;
int i_total;
char p_text[i_textsize+1];
i_total = vbi_print_page_region( &p_page, p_text, i_textsize,
"UTF-8", 0, 0, 0, 0, p_page.columns, p_page.rows );
p_text[i_total] = '\0';
/* Strip off the pagenumber */
if( i_total <= 40 )
goto error;
p_spu->p_region->psz_text = strdup( &p_text[8] );
#ifdef ZVBI_DEBUG
msg_Info( p_dec, "page %x-%x(%d)\n%s", p_page.pgno, p_page.subno, i_total, p_text );
#endif
}
else
{
picture_t *p_pic = p_spu->p_region->p_picture;
/* ZVBI is stupid enough to assume pitch == width */
p_pic->p->i_pitch = 4 * fmt.i_width;
vbi_draw_vt_page( &p_page, ZVBI_PIXFMT_RGBA32,
p_spu->p_region->p_picture->p->p_pixels, 1, 1 );
vlc_mutex_lock( &p_sys->lock );
memcpy( p_sys->nav_link, &p_page.nav_link, sizeof( p_sys->nav_link )) ;
vlc_mutex_unlock( &p_sys->lock );
OpaquePage( p_pic, p_page, fmt, b_opaque );
}
exit:
vbi_unref_page( &p_page );
block_Release( p_block );
return p_spu;
error:
vbi_unref_page( &p_page );
if( p_spu != NULL )
{
decoder_DeleteSubpicture( p_dec, p_spu );
p_spu = NULL;
}
block_Release( p_block );
return NULL;
}