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 <framework/mlt_filter.h>
  22 #include <framework/mlt_factory.h>
  23 #include <framework/mlt_frame.h>
  24 #include <framework/mlt_producer.h>
  25 #include <framework/mlt_transition.h>
  26
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30
  31 /** Do it :-).
  32 */
  33
  34 static int filter_get_image( mlt_frame frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
  35 {
  36         // Error we will return
  37         int error = 0;
  38
  39         // Get the watermark filter object
  40         mlt_filter this = mlt_frame_pop_service( frame );
  41
  42         // Get the properties of the filter
  43         mlt_properties properties = MLT_FILTER_PROPERTIES( this );
  44
  45         mlt_service_lock( MLT_FILTER_SERVICE( this ) );
  46
  47         // Get the producer from the filter
  48         mlt_producer producer = mlt_properties_get_data( properties, "producer", NULL );
  49
  50         // Get the composite from the filter
  51         mlt_transition composite = mlt_properties_get_data( properties, "composite", NULL );
  52
  53         // Get the resource to use
  54         char *resource = mlt_properties_get( properties, "resource" );
  55
  56         // Get the old resource
  57         char *old_resource = mlt_properties_get( properties, "_old_resource" );
  58
  59         // Create a composite if we don't have one
  60         if ( composite == NULL )
  61         {
  62                 // Create composite via the factory
  63                 mlt_profile profile = mlt_service_profile( MLT_FILTER_SERVICE( this ) );
  64                 composite = mlt_factory_transition( profile, "composite", NULL );
  65
  66                 // Register the composite for reuse/destruction
  67                 if ( composite != NULL )
  68                         mlt_properties_set_data( properties, "composite", composite, 0, ( mlt_destructor )mlt_transition_close, NULL );
  69         }
  70
  71         // If we have one
  72         if ( composite != NULL )
  73         {
  74                 // Get the properties
  75                 mlt_properties composite_properties = MLT_TRANSITION_PROPERTIES( composite );
  76
  77                 // Pass all the composite. properties on the filter down
  78                 mlt_properties_pass( composite_properties, properties, "composite." );
  79
  80                 if ( mlt_properties_get( properties, "composite.out" ) == NULL )
  81                         mlt_properties_set_int( composite_properties, "out", mlt_properties_get_int( properties, "_out" ) );
  82
  83                 // Force a refresh
  84                 mlt_properties_set_int( composite_properties, "refresh", 1 );
  85         }
  86
  87         // Create a producer if don't have one
  88         if ( producer == NULL || ( old_resource != NULL && strcmp( resource, old_resource ) ) )
  89         {
  90                 // Get the factory producer service
  91                 char *factory = mlt_properties_get( properties, "factory" );
  92
  93                 // Create the producer
  94                 mlt_profile profile = mlt_service_profile( MLT_FILTER_SERVICE( this ) );
  95                 producer = mlt_factory_producer( profile, factory, resource );
  96
  97                 // If we have one
  98                 if ( producer != NULL )
  99                 {
 100                         // Register the producer for reuse/destruction
 101                         mlt_properties_set_data( properties, "producer", producer, 0, ( mlt_destructor )mlt_producer_close, NULL );
 102
 103                         // Ensure that we loop
 104                         mlt_properties_set( MLT_PRODUCER_PROPERTIES( producer ), "eof", "loop" );
 105
 106                         // Set the old resource
 107                         mlt_properties_set( properties, "_old_resource", resource );
 108                 }
 109         }
 110
 111         if ( producer != NULL )
 112         {
 113                 // Get the producer properties
 114                 mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
 115
 116                 // Now pass all producer. properties on the filter down
 117                 mlt_properties_pass( producer_properties, properties, "producer." );
 118         }
 119
 120         mlt_service_unlock( MLT_FILTER_SERVICE( this ) );
 121
 122         // Only continue if we have both producer and composite
 123         if ( composite != NULL && producer != NULL )
 124         {
 125                 // Get the service of the producer
 126                 mlt_service service = MLT_PRODUCER_SERVICE( producer );
 127
 128                 // We will get the 'b frame' from the producer
 129                 mlt_frame b_frame = NULL;
 130
 131                 // Get the original producer position
 132                 mlt_position position = mlt_filter_get_position( this, frame );
 133
 134                 // Make sure the producer is in the correct position
 135                 mlt_producer_seek( producer, position );
 136
 137                 // Resetting position to appease the composite transition
 138                 mlt_frame_set_position( frame, position );
 139
 140                 // Get the b frame and process with composite if successful
 141                 if ( mlt_service_get_frame( service, &b_frame, 0 ) == 0 )
 142                 {
 143                         // Get the a and b frame properties
 144                         mlt_properties a_props = MLT_FRAME_PROPERTIES( frame );
 145                         mlt_properties b_props = MLT_FRAME_PROPERTIES( b_frame );
 146                         mlt_profile profile = mlt_service_profile( service );
 147
 148                         // Set the b frame to be in the same position and have same consumer requirements
 149                         mlt_frame_set_position( b_frame, position );
 150                         mlt_properties_set_int( b_props, "consumer_deinterlace", mlt_properties_get_int( a_props, "consumer_deinterlace" ) || mlt_properties_get_int( properties, "deinterlace" ) );
 151
 152                         // Check for the special case - no aspect ratio means no problem :-)
 153                         if ( mlt_frame_get_aspect_ratio( b_frame ) == 0 )
 154                                 mlt_frame_set_aspect_ratio( b_frame, mlt_profile_sar( profile ) );
 155                         if ( mlt_frame_get_aspect_ratio( frame ) == 0 )
 156                                 mlt_frame_set_aspect_ratio( frame, mlt_profile_sar( profile ) );
 157
 158                         if ( mlt_properties_get_int( properties, "distort" ) )
 159                         {
 160                                 mlt_properties_set_int( MLT_TRANSITION_PROPERTIES( composite ), "distort", 1 );
 161                                 mlt_properties_set_int( a_props, "distort", 1 );
 162                                 mlt_properties_set_int( b_props, "distort", 1 );
 163                         }
 164
 165                         *format = mlt_image_yuv422;
 166                         if ( mlt_properties_get_int( properties, "reverse" ) == 0 )
 167                         {
 168                                 // Apply all filters that are attached to this filter to the b frame
 169                                 mlt_service_apply_filters( MLT_FILTER_SERVICE( this ), b_frame, 0 );
 170
 171                                 // Process the frame
 172                                 mlt_transition_process( composite, frame, b_frame );
 173
 174                                 // Get the image
 175                                 error = mlt_frame_get_image( frame, image, format, width, height, 1 );
 176                         }
 177                         else
 178                         {
 179                                 char temp[ 132 ];
 180                                 int count = 0;
 181                                 uint8_t *alpha = NULL;
 182                                 const char *rescale = mlt_properties_get( a_props, "rescale.interp" );
 183                                 if ( rescale == NULL || !strcmp( rescale, "none" ) )
 184                                         rescale = "hyper";
 185                                 mlt_transition_process( composite, b_frame, frame );
 186                                 mlt_properties_set_int( a_props, "consumer_deinterlace", 1 );
 187                                 mlt_properties_set_int( b_props, "consumer_deinterlace", 1 );
 188                                 mlt_properties_set( a_props, "rescale.interp", rescale );
 189                                 mlt_properties_set( b_props, "rescale.interp", rescale );
 190                                 mlt_service_apply_filters( MLT_FILTER_SERVICE( this ), b_frame, 0 );
 191                                 error = mlt_frame_get_image( b_frame, image, format, width, height, 1 );
 192                                 alpha = mlt_frame_get_alpha_mask( b_frame );
 193                                 mlt_frame_set_image( frame, *image, *width * *height * 2, NULL );
 194                                 mlt_frame_set_alpha( frame, alpha, *width * *height, NULL );
 195                                 mlt_properties_set_int( a_props, "width", *width );
 196                                 mlt_properties_set_int( a_props, "height", *height );
 197                                 mlt_properties_set_int( a_props, "progressive", 1 );
 198                                 mlt_properties_inc_ref( b_props );
 199                                 strcpy( temp, "_b_frame" );
 200                                 while( mlt_properties_get_data( a_props, temp, NULL ) != NULL )
 201                                         sprintf( temp, "_b_frame%d", count ++ );
 202                                 mlt_properties_set_data( a_props, temp, b_frame, 0, ( mlt_destructor )mlt_frame_close, NULL );
 203                         }
 204                 }
 205
 206                 // Close the b frame
 207                 mlt_frame_close( b_frame );
 208         }
 209         else
 210         {
 211                 // Get the image from the frame without running fx
 212                 error = mlt_frame_get_image( frame, image, format, width, height, 1 );
 213         }
 214
 215         return error;
 216 }
 217
 218 /** Filter processing.
 219 */
 220
 221 static mlt_frame filter_process( mlt_filter this, mlt_frame frame )
 222 {
 223         // Get the properties of the frame
 224         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 225
 226         // Assign the frame out point to the filter (just in case we need it later)
 227         mlt_properties_set_int( MLT_FILTER_PROPERTIES( this ), "_out", mlt_properties_get_int( properties, "out" ) );
 228
 229         // Push the filter on to the stack
 230         mlt_frame_push_service( frame, this );
 231
 232         // Push the get_image on to the stack
 233         mlt_frame_push_get_image( frame, filter_get_image );
 234
 235         return frame;
 236 }
 237
 238 /** Constructor for the filter.
 239 */
 240
 241 mlt_filter filter_watermark_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
 242 {
 243         mlt_filter this = mlt_filter_new( );
 244         if ( this != NULL )
 245         {
 246                 mlt_properties properties = MLT_FILTER_PROPERTIES( this );
 247                 this->process = filter_process;
 248                 mlt_properties_set( properties, "factory", mlt_environment( "MLT_PRODUCER" ) );
 249                 if ( arg != NULL )
 250                         mlt_properties_set( properties, "resource", arg );
 251                 // Ensure that attached filters are handled privately
 252                 mlt_properties_set_int( properties, "_filter_private", 1 );
 253         }
 254         return this;
 255 }
 256