git.sesse.net Git - mlt/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
  24 #include <stdlib.h>
  25 #include <string.h>
  26
  27 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
  28 {
  29
  30         // Obtain properties of frame
  31         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
  32
  33         // Obtain the producer for this frame
  34         mlt_producer producer = mlt_properties_get_data( properties, "producer_frei0r", NULL );
  35
  36         // Obtain properties of producer
  37         mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
  38
  39         // Choose suitable out values if nothing specific requested
  40         if ( *width <= 0 )
  41                 *width = mlt_service_profile( MLT_PRODUCER_SERVICE(producer) )->width;
  42         if ( *height <= 0 )
  43                 *height = mlt_service_profile( MLT_PRODUCER_SERVICE(producer) )->height;
  44
  45         // Allocate the image
  46         int size = *width * ( *height + 1 ) * 4;
  47
  48         // Allocate the image
  49         *buffer = mlt_pool_alloc( size );
  50
  51         // Update the frame
  52         mlt_frame_set_image( frame, *buffer, size, mlt_pool_release );
  53
  54         *format = mlt_image_rgb24a;
  55         if ( *buffer != NULL )
  56         {
  57                 double position = mlt_frame_get_position( frame );
  58                 mlt_profile profile = mlt_service_profile( MLT_PRODUCER_SERVICE( producer ) );
  59                 double time = position / mlt_profile_fps( profile );
  60                 process_frei0r_item( MLT_PRODUCER_SERVICE(producer), position, time, producer_props, frame, buffer, width, height );
  61         }
  62
  63     return 0;
  64 }
  65
  66 int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
  67 {
  68         // Generate a frame
  69         *frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
  70
  71         if ( *frame != NULL )
  72         {
  73                 // Obtain properties of frame and producer
  74                 mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
  75
  76                 // Obtain properties of producer
  77                 mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
  78
  79                 // Set the producer on the frame properties
  80                 mlt_properties_set_data( properties, "producer_frei0r", producer, 0, NULL, NULL );
  81
  82                 // Update timecode on the frame we're creating
  83                 mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
  84
  85                 // Set producer-specific frame properties
  86                 mlt_properties_set_int( properties, "progressive", 1 );
  87                 mlt_profile profile = mlt_service_profile( MLT_PRODUCER_SERVICE( producer ) );
  88                 mlt_properties_set_double( properties, "aspect_ratio", mlt_profile_sar( profile ) );
  89
  90                 // Push the get_image method
  91                 mlt_frame_push_get_image( *frame, producer_get_image );
  92         }
  93
  94         // Calculate the next timecode
  95         mlt_producer_prepare_next( producer );
  96
  97         return 0;
  98 }
  99
 100 void producer_close( mlt_producer producer )
 101 {
 102         producer->close = NULL;
 103         mlt_producer_close( producer );
 104         free( producer );
 105 }