research.m1stereo.tv/gitweb/ - melted/blob - src/modules/frei0r/producer_frei0r.c

   1 /*
   2  * producer_frei0r.c -- frei0r producer
   3  * Copyright (c) 2009 Jean-Baptiste Mardelle <jb@kdenlive.org>
   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
  22 #include "frei0r_helper.h"
  23 #include <string.h>
  24
  25 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
  26 {
  27
  28         // Obtain properties of frame
  29         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
  30
  31         // Obtain the producer for this frame
  32         mlt_producer producer = mlt_properties_get_data( properties, "producer_frei0r", NULL );
  33
  34         // Obtain properties of producer
  35         mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
  36
  37         // Allocate the image
  38         int size = *width * ( *height + 1 ) * 2;
  39
  40         // Allocate the image
  41         *buffer = mlt_pool_alloc( size );
  42
  43         // Update the frame
  44         mlt_properties_set_data( properties, "image", *buffer, size, mlt_pool_release, NULL );
  45         mlt_properties_set_int( properties, "width", *width );
  46         mlt_properties_set_int( properties, "height", *height );
  47
  48         *format = mlt_image_yuv422;
  49         if ( *buffer != NULL )
  50         {
  51                 mlt_position in = mlt_producer_get_in( producer );
  52                 mlt_position out = mlt_producer_get_out( producer );
  53                 mlt_position time = mlt_frame_get_position( frame );
  54                 double position = ( double )( time - in ) / ( double )( out - in + 1 );
  55                 process_frei0r_item( producer_type , position, producer_props, frame , buffer, format , width , height , writable );
  56         }
  57
  58     return 0;
  59 }
  60
  61 int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
  62 {
  63         // Generate a frame
  64         *frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
  65
  66         if ( *frame != NULL )
  67         {
  68                 // Obtain properties of frame and producer
  69                 mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
  70
  71                 // Obtain properties of producer
  72                 mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
  73
  74                 // Set the producer on the frame properties
  75                 mlt_properties_set_data( properties, "producer_frei0r", producer, 0, NULL, NULL );
  76
  77                 // Update timecode on the frame we're creating
  78                 mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
  79
  80                 // Set producer-specific frame properties
  81                 mlt_properties_set_int( properties, "progressive", 1 );
  82                 mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( producer_props, "aspect_ratio" ) );
  83
  84                 // Push the get_image method
  85                 mlt_frame_push_get_image( *frame, producer_get_image );
  86         }
  87
  88         // Calculate the next timecode
  89         mlt_producer_prepare_next( producer );
  90
  91         return 0;
  92 }
  93
  94 void producer_close( mlt_producer producer )
  95 {
  96         producer->close = NULL;
  97         mlt_producer_close( producer );
  98         free( producer );
  99 }