research.m1stereo.tv/gitweb/ - melted/blob - src/modules/xine/filter_deinterlace.c

   1 /*
   2  * filter_deinterlace.c -- deinterlace 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 <framework/mlt_filter.h>
  22 #include "deinterlace.h"
  23
  24 #include <framework/mlt_frame.h>
  25
  26 #include <string.h>
  27 #include <stdlib.h>
  28
  29 /** Do it :-).
  30 */
  31
  32 static int filter_get_image( mlt_frame this, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
  33 {
  34         int error = 0;
  35         int deinterlace = mlt_properties_get_int( MLT_FRAME_PROPERTIES( this ), "consumer_deinterlace" );
  36
  37         // Pop the service off the stack
  38         mlt_filter filter = mlt_frame_pop_service( this );
  39
  40         // Determine if we need a writable version or not
  41         if ( deinterlace && !writable )
  42                  writable = !mlt_properties_get_int( MLT_FRAME_PROPERTIES( this ), "progressive" );
  43
  44         // Get the input image
  45         error = mlt_frame_get_image( this, image, format, width, height, writable );
  46
  47         // Check that we want progressive and we aren't already progressive
  48         if ( deinterlace && *format == mlt_image_yuv422 && *image != NULL && !mlt_properties_get_int( MLT_FRAME_PROPERTIES( this ), "progressive" ) )
  49         {
  50                 // Determine deinterlace method
  51                 char *method_str = mlt_properties_get( MLT_FILTER_PROPERTIES( filter ), "method" );
  52                 int method = DEINTERLACE_LINEARBLEND;
  53                 char *frame_method_str = mlt_properties_get( MLT_FRAME_PROPERTIES( this ), "deinterlace_method" );
  54
  55                 if ( frame_method_str != NULL )
  56                         method_str = frame_method_str;
  57
  58                 if ( method_str == NULL )
  59                         method = DEINTERLACE_LINEARBLEND;
  60                 else if ( strcmp( method_str, "bob" ) == 0 )
  61                         method = DEINTERLACE_BOB;
  62                 else if ( strcmp( method_str, "weave" ) == 0 )
  63                         method = DEINTERLACE_BOB;
  64                 else if ( strcmp( method_str, "greedy" ) == 0 )
  65                         method = DEINTERLACE_GREEDY;
  66                 else if ( strcmp( method_str, "onefield" ) == 0 )
  67                         method = DEINTERLACE_ONEFIELD;
  68
  69                 // Deinterlace the image
  70                 deinterlace_yuv( *image, image, *width * 2, *height, method );
  71
  72                 // Make sure that others know the frame is deinterlaced
  73                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( this ), "progressive", 1 );
  74         }
  75
  76         return error;
  77 }
  78
  79 /** Deinterlace filter processing - this should be lazy evaluation here...
  80 */
  81
  82 static mlt_frame deinterlace_process( mlt_filter this, mlt_frame frame )
  83 {
  84         // Push this on to the service stack
  85         mlt_frame_push_service( frame, this );
  86
  87         // Push the get_image method on to the stack
  88         mlt_frame_push_get_image( frame, filter_get_image );
  89
  90         return frame;
  91 }
  92
  93 /** Constructor for the filter.
  94 */
  95
  96 mlt_filter filter_deinterlace_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
  97 {
  98         mlt_filter this = mlt_filter_new( );
  99         if ( this != NULL )
 100         {
 101                 this->process = deinterlace_process;
 102                 mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "method", arg );
 103         }
 104         return this;
 105 }
 106