git.sesse.net Git - mlt/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 library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library 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 GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, 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 #include <string.h>
  31
  32 /** Do it :-).
  33 */
  34
  35 static int filter_get_image( mlt_frame frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
  36 {
  37         // Error we will return
  38         int error = 0;
  39
  40         // Get the watermark filter object
  41         mlt_filter this = mlt_frame_pop_service( frame );
  42
  43         // Get the properties of the filter
  44         mlt_properties properties = MLT_FILTER_PROPERTIES( this );
  45
  46         // Get the producer from the filter
  47         mlt_producer producer = mlt_properties_get_data( properties, "producer", NULL );
  48
  49         // Get the composite from the filter
  50         mlt_transition composite = mlt_properties_get_data( properties, "composite", NULL );
  51
  52         // Get the resource to use
  53         char *resource = mlt_properties_get( properties, "resource" );
  54
  55         // Get the old resource
  56         char *old_resource = mlt_properties_get( properties, "_old_resource" );
  57
  58         // Create a composite if we don't have one
  59         if ( composite == NULL )
  60         {
  61                 // Create composite via the factory
  62                 composite = mlt_factory_transition( "composite", NULL );
  63
  64                 // Register the composite for reuse/destruction
  65                 if ( composite != NULL )
  66                         mlt_properties_set_data( properties, "composite", composite, 0, ( mlt_destructor )mlt_transition_close, NULL );
  67         }
  68
  69         // If we have one
  70         if ( composite != NULL )
  71         {
  72                 // Get the properties
  73                 mlt_properties composite_properties = MLT_TRANSITION_PROPERTIES( composite );
  74
  75                 // Pass all the composite. properties on the filter down
  76                 mlt_properties_pass( composite_properties, properties, "composite." );
  77
  78                 if ( mlt_properties_get( properties, "composite.out" ) == NULL )
  79                         mlt_properties_set_int( composite_properties, "out", mlt_properties_get_int( properties, "_out" ) );
  80
  81                 // Force a refresh
  82                 mlt_properties_set_int( composite_properties, "refresh", 1 );
  83         }
  84
  85         // Create a producer if don't have one
  86         if ( producer == NULL || ( old_resource != NULL && strcmp( resource, old_resource ) ) )
  87         {
  88                 // Get the factory producer service
  89                 char *factory = mlt_properties_get( properties, "factory" );
  90
  91                 // Create the producer
  92                 producer = mlt_factory_producer( factory, resource );
  93
  94                 // If we have one
  95                 if ( producer != NULL )
  96                 {
  97                         // Register the producer for reuse/destruction
  98                         mlt_properties_set_data( properties, "producer", producer, 0, ( mlt_destructor )mlt_producer_close, NULL );
  99
 100                         // Ensure that we loop
 101                         mlt_properties_set( MLT_PRODUCER_PROPERTIES( producer ), "eof", "loop" );
 102
 103                         // Set the old resource
 104                         mlt_properties_set( properties, "_old_resource", resource );
 105                 }
 106         }
 107
 108         if ( producer != NULL )
 109         {
 110                 // Get the producer properties
 111                 mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
 112
 113                 // Now pass all producer. properties on the filter down
 114                 mlt_properties_pass( producer_properties, properties, "producer." );
 115         }
 116
 117         // Only continue if we have both producer and composite
 118         if ( composite != NULL && producer != NULL )
 119         {
 120                 // Get the service of the producer
 121                 mlt_service service = MLT_PRODUCER_SERVICE( producer );
 122
 123                 // We will get the 'b frame' from the producer
 124                 mlt_frame b_frame = NULL;
 125
 126                 // Get the unique id of the filter (used to reacquire the producer position)
 127                 char *name = mlt_properties_get( properties, "_unique_id" );
 128
 129                 // Get the original producer position
 130                 mlt_position position = mlt_properties_get_position( MLT_FRAME_PROPERTIES( frame ), name );
 131
 132                 // Make sure the producer is in the correct position
 133                 mlt_producer_seek( producer, position );
 134
 135                 // Resetting position to appease the composite transition
 136                 mlt_frame_set_position( frame, position );
 137
 138                 // Get the b frame and process with composite if successful
 139                 if ( mlt_service_get_frame( service, &b_frame, 0 ) == 0 )
 140                 {
 141                         // Get the a and b frame properties
 142                         mlt_properties a_props = MLT_FRAME_PROPERTIES( frame );
 143                         mlt_properties b_props = MLT_FRAME_PROPERTIES( b_frame );
 144
 145                         // Set the b frame to be in the same position and have same consumer requirements
 146                         mlt_frame_set_position( b_frame, position );
 147                         mlt_properties_set_double( b_props, "consumer_aspect_ratio", mlt_properties_get_double( a_props, "consumer_aspect_ratio" ) );
 148                         mlt_properties_set_int( b_props, "consumer_deinterlace", mlt_properties_get_double( a_props, "consumer_deinterlace" ) );
 149                         mlt_properties_set_int( b_props, "output_ratio", mlt_properties_get_double( a_props, "output_ratio" ) );
 150
 151                         // Check for the special case - no aspect ratio means no problem :-)
 152                         if ( mlt_frame_get_aspect_ratio( b_frame ) == 0 )
 153                                 mlt_properties_set_double( b_props, "aspect_ratio", mlt_properties_get_double( a_props, "consumer_aspect_ratio" ) );
 154                         if ( mlt_frame_get_aspect_ratio( frame ) == 0 )
 155                                 mlt_properties_set_double( a_props, "aspect_ratio", mlt_properties_get_double( a_props, "consumer_aspect_ratio" ) );
 156
 157                         mlt_properties_set_int( b_props, "normalised_width", mlt_properties_get_int( a_props, "normalised_width" ) );
 158                         mlt_properties_set_int( b_props, "normalised_height", mlt_properties_get_int( a_props, "normalised_height" ) );
 159
 160                         if ( mlt_properties_get_int( properties, "distort" ) )
 161                         {
 162                                 mlt_properties_set_int( MLT_TRANSITION_PROPERTIES( composite ), "distort", 1 );
 163                                 mlt_properties_set_int( a_props, "distort", 1 );
 164                                 mlt_properties_set_int( b_props, "distort", 1 );
 165                         }
 166
 167                         if ( mlt_properties_get_int( properties, "reverse" ) == 0 )
 168                         {
 169                                 // Apply all filters that are attached to this filter to the b frame
 170                                 mlt_service_apply_filters( MLT_FILTER_SERVICE( this ), b_frame, 0 );
 171
 172                                 // Process the frame
 173                                 mlt_transition_process( composite, frame, b_frame );
 174
 175                                 // Get the image
 176                                 error = mlt_frame_get_image( frame, image, format, width, height, 1 );
 177                         }
 178                         else
 179                         {
 180                                 char temp[ 132 ];
 181                                 int count = 0;
 182                                 uint8_t *alpha = NULL;
 183                                 char *rescale = mlt_properties_get( a_props, "rescale.interp" );
 184                                 if ( rescale == NULL || !strcmp( rescale, "none" ) )
 185                                         rescale = "hyper";
 186                                 mlt_transition_process( composite, b_frame, frame );
 187                                 mlt_properties_set_int( a_props, "consumer_deinterlace", 1 );
 188                                 mlt_properties_set_int( b_props, "consumer_deinterlace", 1 );
 189                                 mlt_properties_set( a_props, "rescale.interp", rescale );
 190                                 mlt_properties_set( b_props, "rescale.interp", rescale );
 191                                 mlt_service_apply_filters( MLT_FILTER_SERVICE( this ), b_frame, 0 );
 192                                 error = mlt_frame_get_image( b_frame, image, format, width, height, 1 );
 193                                 alpha = mlt_frame_get_alpha_mask( b_frame );
 194                                 mlt_properties_set_data( a_props, "image", *image, *width * *height * 2, NULL, NULL );
 195                                 mlt_properties_set_data( a_props, "alpha", alpha, *width * *height, NULL, NULL );
 196                                 mlt_properties_set_int( a_props, "width", *width );
 197                                 mlt_properties_set_int( a_props, "height", *height );
 198                                 mlt_properties_set_int( a_props, "progressive", 1 );
 199                                 mlt_properties_inc_ref( b_props );
 200                                 strcpy( temp, "_b_frame" );
 201                                 while( mlt_properties_get_data( a_props, temp, NULL ) != NULL )
 202                                         sprintf( temp, "_b_frame%d", count ++ );
 203                                 mlt_properties_set_data( a_props, temp, b_frame, 0, ( mlt_destructor )mlt_frame_close, NULL );
 204                         }
 205                 }
 206
 207                 // Close the b frame
 208                 mlt_frame_close( b_frame );
 209         }
 210         else
 211         {
 212                 // Get the image from the frame without running fx
 213                 error = mlt_frame_get_image( frame, image, format, width, height, 1 );
 214         }
 215
 216         return error;
 217 }
 218
 219 /** Filter processing.
 220 */
 221
 222 static mlt_frame filter_process( mlt_filter this, mlt_frame frame )
 223 {
 224         // Get the properties of the frame
 225         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 226
 227         // Get a unique name to store the frame position
 228         char *name = mlt_properties_get( MLT_FILTER_PROPERTIES( this ), "_unique_id" );
 229
 230         // Assign the frame out point to the filter (just in case we need it later)
 231         mlt_properties_set_int( MLT_FILTER_PROPERTIES( this ), "_out", mlt_properties_get_int( properties, "out" ) );
 232
 233         // Assign the current position to the name
 234         mlt_properties_set_position( properties, name, mlt_frame_get_position( frame ) - mlt_filter_get_in( this ) );
 235
 236         // Push the filter on to the stack
 237         mlt_frame_push_service( frame, this );
 238
 239         // Push the get_image on to the stack
 240         mlt_frame_push_get_image( frame, filter_get_image );
 241
 242         return frame;
 243 }
 244
 245 /** Constructor for the filter.
 246 */
 247
 248 mlt_filter filter_watermark_init( void *arg )
 249 {
 250         mlt_filter this = mlt_filter_new( );
 251         if ( this != NULL )
 252         {
 253                 mlt_properties properties = MLT_FILTER_PROPERTIES( this );
 254                 this->process = filter_process;
 255                 mlt_properties_set( properties, "factory", "fezzik" );
 256                 if ( arg != NULL )
 257                         mlt_properties_set( properties, "resource", arg );
 258                 // Ensure that attached filters are handled privately
 259                 mlt_properties_set_int( properties, "_filter_private", 1 );
 260         }
 261         return this;
 262 }
 263