research.m1stereo.tv/gitweb/ - melted/blob - src/modules/frei0r/transition_frei0r.c

   1 /*
   2  * transition_frei0r.c -- frei0r transition
   3  * Copyright (c) 2008 Marco Gittler <g.marco@freenet.de>
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  */
  19
  20 #include <framework/mlt.h>
  21 #include "frei0r_helper.h"
  22 #include <string.h>
  23
  24 static int transition_get_image( mlt_frame a_frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable ){
  25
  26         if (*format!=mlt_image_yuv422 ){
  27                 return -1;
  28         }
  29
  30         mlt_frame b_frame = mlt_frame_pop_frame( a_frame );
  31         mlt_transition transition = mlt_frame_pop_service( a_frame );
  32         mlt_properties properties = MLT_TRANSITION_PROPERTIES( transition );
  33         mlt_properties a_props = MLT_FRAME_PROPERTIES( a_frame );
  34         mlt_properties b_props = MLT_FRAME_PROPERTIES( b_frame );
  35
  36         int invert = mlt_properties_get_int( properties, "invert" );
  37
  38         if ( mlt_properties_get( a_props, "rescale.interp" ) == NULL || !strcmp( mlt_properties_get( a_props, "rescale.interp" ), "none" ) )
  39                 mlt_properties_set( a_props, "rescale.interp", "nearest" );
  40
  41         // set consumer_aspect_ratio for a and b frame
  42         if ( mlt_properties_get_double( a_props, "aspect_ratio" ) == 0.0 )
  43                 mlt_properties_set_double( a_props, "aspect_ratio", mlt_properties_get_double( a_props, "consumer_aspect_ratio" ) );
  44         if ( mlt_properties_get_double( b_props, "aspect_ratio" ) == 0.0 )
  45                 mlt_properties_set_double( b_props, "aspect_ratio", mlt_properties_get_double( a_props, "consumer_aspect_ratio" ) );
  46         mlt_properties_set_double( b_props, "consumer_aspect_ratio", mlt_properties_get_double( a_props, "consumer_aspect_ratio" ) );
  47
  48
  49         *width = mlt_properties_get_int( !invert ? a_props : b_props, "width" );
  50         *height = mlt_properties_get_int( !invert ? a_props : b_props, "height" );
  51
  52         uint8_t *images[]={NULL,NULL,NULL};
  53
  54         mlt_frame_get_image( a_frame, &images[0], format, width, height, 1 );
  55         mlt_frame_get_image( b_frame, &images[1], format, width, height, 1 );
  56
  57         mlt_position in = mlt_transition_get_in( transition );
  58         mlt_position out = mlt_transition_get_out( transition );
  59
  60         // Get the position of the frame
  61         char *name = mlt_properties_get( MLT_TRANSITION_PROPERTIES( transition ), "_unique_id" );
  62         mlt_position position = mlt_properties_get_position( MLT_FRAME_PROPERTIES( a_frame ), name );
  63
  64         float pos=( float )( position - in ) / ( float )( out - in + 1 );
  65
  66         process_frei0r_item( transition_type , pos , properties, a_frame, images, format, width,height, writable );
  67         if (images[2]){
  68                 *image=images[2];
  69         }
  70         return 0;
  71 }
  72
  73 mlt_frame transition_process( mlt_transition transition, mlt_frame a_frame, mlt_frame b_frame )
  74 {
  75         char *name = mlt_properties_get( MLT_TRANSITION_PROPERTIES( transition ), "_unique_id" );
  76         mlt_properties_set_position( MLT_FRAME_PROPERTIES( a_frame ), name, mlt_frame_get_position( a_frame ) );
  77         mlt_frame_push_service( a_frame, transition );
  78         mlt_frame_push_frame( a_frame, b_frame );
  79         mlt_frame_push_get_image( a_frame, transition_get_image );
  80         return a_frame;
  81 }
  82
  83 void transition_close( mlt_transition this ){
  84         destruct ( MLT_TRANSITION_PROPERTIES ( this ) );
  85 }