XIRef<Packet> AVDeMuxer::Get()
{
XIRef<Packet> pkt;
if( _bsfc && (_deMuxPkt.stream_index == _videoStreamIndex) )
{
pkt = _pf->Get( (size_t)_filterPkt.size + DEFAULT_PADDING );
pkt->SetDataSize( _filterPkt.size );
memcpy( pkt->Map(), _filterPkt.data, _filterPkt.size );
}
else
{
pkt = _pf->Get( (size_t)_deMuxPkt.size + DEFAULT_PADDING );
pkt->SetDataSize( _deMuxPkt.size );
memcpy( pkt->Map(), _deMuxPkt.data, _deMuxPkt.size );
}
if( IsKey() )
pkt->SetKey( true );
return pkt;
}
XIRef<Packet> ExportOverlay::Process( XIRef<Packet> input, int64_t clockTime )
{
cairo_surface_t* surface = NULL;
cairo_t* cr = NULL;
try
{
surface = cairo_image_surface_create( CAIRO_FORMAT_ARGB32, _width, _height );
cr = cairo_create( surface );
uint8_t* cairoSrc = cairo_image_surface_get_data( surface );
int cairoSrcWidth = cairo_image_surface_get_width( surface );
int cairoSrcHeight = cairo_image_surface_get_height( surface );
if( cairo_image_surface_get_stride( surface ) != (cairoSrcWidth * 4) )
X_THROW(("Unexpected cairo stride!"));
cairo_set_source_rgba( cr, 0.0, 0.0, 0.0, 1.0 );
cairo_rectangle( cr, 0.0, 0.0, cairoSrcWidth, cairoSrcHeight );
cairo_fill( cr );
memcpy( cairoSrc, input->Map(), input->GetDataSize() );
PangoLayout* layout = pango_cairo_create_layout( cr );
pango_layout_set_text( layout, _decodedMsg.c_str(), -1 );
PangoFontDescription* desc = pango_font_description_from_string( "Helvetica 22" );
pango_layout_set_font_description( layout, desc );
pango_font_description_free( desc );
PangoRectangle logicalRect;
pango_layout_get_pixel_extents( layout, NULL, &logicalRect );
uint16_t y = (_vAlign==V_ALIGN_TOP) ? 14 : _height - 52;
uint16_t timeX = 0;
uint16_t msgX = 0;
uint16_t bgX = 0;
uint16_t bgWidth = 0;
_GetXPositions( timeX, msgX, logicalRect.width, bgX, bgWidth );
cairo_set_source_rgba( cr, 0.5, 0.5, 0.5, 0.50 );
cairo_rectangle( cr, bgX, y, bgWidth, 32 );
cairo_fill( cr );
cairo_set_source_rgba( cr, 1.0, 1.0, 1.0, 1.0 );
if( !_decodedMsg.empty() )
_DrawMessage( cr, layout, msgX, y );
if( _withTime )
_DrawTime( cr, timeX, y, clockTime );
g_object_unref( layout );
// copy from our watermark surface to our output surface...
cairo_set_source_surface( cr, _wmSurface, _logoX, _logoY );
cairo_rectangle( cr, _logoX, _logoY, _logoWidth, _logoHeight );
cairo_clip( cr );
cairo_paint_with_alpha( cr, 0.70 );
// Copy data out of our cairo surface into our output packet...
size_t outputSize = (cairoSrcWidth * 4) * cairoSrcHeight;
XIRef<Packet> dest = new Packet( outputSize );
memcpy( dest->Map(), cairoSrc, outputSize );
dest->SetDataSize( outputSize );
cairo_destroy( cr );
cairo_surface_destroy( surface );
return dest;
}
catch(...)
{
if( cr )
cairo_destroy( cr );
if( surface )
cairo_surface_destroy( surface );
throw;
}
}
