research.m1stereo.tv/gitweb/ - melted/blob - src/modules/core/filter_watermark.c

   1 /*
   2  * filter_watermark.c -- watermark filter
   3  * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
   4  * Author: Charles Yates <charles.yates@pandora.be>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include "filter_watermark.h"
  22
  23 #include <framework/mlt_factory.h>
  24 #include <framework/mlt_frame.h>
  25 #include <framework/mlt_producer.h>
  26 #include <framework/mlt_transition.h>
  27
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30
  31 /** Do it :-).
  32 */
  33
  34 static int filter_get_image( mlt_frame this, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
  35 {
  36         int error = 0;
  37         mlt_filter filter = mlt_frame_pop_service( this );
  38         mlt_properties properties = mlt_filter_properties( filter );
  39         mlt_producer producer = mlt_properties_get_data( properties, "producer", NULL );
  40         mlt_transition composite = mlt_properties_get_data( properties, "composite", NULL );
  41
  42         if ( composite == NULL )
  43         {
  44                 char *geometry = mlt_properties_get( properties, "geometry" );
  45                 composite = mlt_factory_transition( "composite", geometry == NULL ? "85%,5%:10%x10%" : geometry );
  46                 if ( composite != NULL )
  47                 {
  48                         mlt_properties composite_properties = mlt_transition_properties( composite );
  49                         char *distort = mlt_properties_get( properties, "distort" );
  50                         if ( distort != NULL )
  51                                 mlt_properties_set( composite_properties, "distort", distort );
  52                         mlt_properties_set_data( properties, "composite", composite, 0, ( mlt_destructor )mlt_transition_close, NULL );
  53                 }
  54         }
  55
  56         if ( producer == NULL )
  57         {
  58                 char *resource = mlt_properties_get( properties, "resource" );
  59                 char *factory = mlt_properties_get( properties, "factory" );
  60                 producer = mlt_factory_producer( factory, resource );
  61                 if ( producer != NULL )
  62                 {
  63                         mlt_properties producer_properties = mlt_producer_properties( producer );
  64                         mlt_properties_set( producer_properties, "eof", "loop" );
  65                         mlt_properties_set_data( properties, "producer", producer, 0, ( mlt_destructor )mlt_producer_close, NULL );
  66                 }
  67         }
  68
  69         if ( composite != NULL && producer != NULL )
  70         {
  71                 mlt_service service = mlt_producer_service( producer );
  72                 mlt_frame b_frame = NULL;
  73
  74                 if ( mlt_service_get_frame( service, &b_frame, 0 ) == 0 )
  75                         mlt_transition_process( composite, this, b_frame );
  76
  77                 error = mlt_frame_get_image( this, image, format, width, height, 1 );
  78
  79                 mlt_frame_close( b_frame );
  80         }
  81         else
  82         {
  83                 error = mlt_frame_get_image( this, image, format, width, height, 1 );
  84         }
  85
  86         return error;
  87 }
  88
  89 /** Filter processing.
  90 */
  91
  92 static mlt_frame filter_process( mlt_filter this, mlt_frame frame )
  93 {
  94         // Push the filter on to the stack
  95         mlt_frame_push_service( frame, this );
  96
  97         // Push the get_image on to the stack
  98         mlt_frame_push_get_image( frame, filter_get_image );
  99
 100         return frame;
 101 }
 102
 103 /** Constructor for the filter.
 104 */
 105
 106 mlt_filter filter_watermark_init( void *arg )
 107 {
 108         mlt_filter this = mlt_filter_new( );
 109         if ( this != NULL )
 110         {
 111                 mlt_properties properties = mlt_filter_properties( this );
 112                 this->process = filter_process;
 113                 mlt_properties_set( properties, "factory", "fezzik" );
 114                 if ( arg != NULL )
 115                         mlt_properties_set( properties, "resource", arg );
 116         }
 117         return this;
 118 }
 119