git.sesse.net Git - mlt/blob - src/modules/qimage/producer_kdenlivetitle.c

   1 /*
   2  * producer_kdenlivetitle.c -- kdenlive producer
   3  * Copyright (c) 2009 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  18  */
  19
  20 #include <framework/mlt.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23
  24 extern void init_qt();
  25
  26 extern void refresh_kdenlivetitle( uint8_t*, int, int, double, char*, char*, int );
  27
  28 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
  29 {
  30
  31         // Obtain properties of frame
  32         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
  33
  34         // Obtain the producer for this frame
  35         mlt_producer producer = mlt_properties_get_data( properties, "producer_kdenlivetitle", NULL );
  36
  37         // Obtain properties of producer
  38         mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
  39
  40         // Allocate the image
  41         int size = *width * ( *height ) * 4;
  42
  43         *buffer = mlt_pool_alloc( size );
  44         // Update the frame
  45         mlt_properties_set_int( properties, "width", *width );
  46         mlt_properties_set_int( properties, "height", *height );
  47
  48         // Update the frame
  49         mlt_properties_set_data( properties, "image", *buffer, size, mlt_pool_release, NULL );
  50         //cache later ??
  51
  52         if ( 1 )
  53         {
  54                 // Allocate the image
  55                 *format = mlt_image_rgb24a;
  56                 mlt_position in = mlt_producer_get_in( producer );
  57                 mlt_position out = mlt_producer_get_out( producer );
  58                 mlt_position time = mlt_producer_position( producer );
  59                 double position = ( double )( time - in ) / ( double )( out - in + 1 );
  60                 fprintf(stderr, "TITLE POS: %dx%d = %d\n", (int)in, (int)out, (int) time);
  61                 if ( mlt_properties_get_int( producer_props, "force_reload" ) ) {
  62                         refresh_kdenlivetitle( *buffer, *width, *height, position, mlt_properties_get( producer_props, "xmldata" ), mlt_properties_get( producer_props, "templatetext" ),  1);
  63                         mlt_properties_set_int( producer_props, "force_reload", 0 );
  64                 }
  65                 else refresh_kdenlivetitle( *buffer, *width, *height, position, mlt_properties_get( producer_props, "xmldata" ), mlt_properties_get( producer_props, "templatetext" ),  0);
  66                 mlt_log_debug( MLT_PRODUCER_SERVICE( producer ), "width:%d height:%d %s\n", *width, *height, mlt_image_format_name( *format ) );
  67         }
  68
  69         return 0;
  70 }
  71
  72 int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
  73
  74 {
  75
  76         // Generate a frame
  77         *frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
  78
  79         if ( *frame != NULL )
  80         {
  81                 // Obtain properties of frame and producer
  82                 mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
  83
  84                 // Obtain properties of producer
  85                 mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
  86
  87                 // Set the producer on the frame properties
  88                 mlt_properties_set_data( properties, "producer_kdenlivetitle", producer, 0, NULL, NULL );
  89
  90                 // Update timecode on the frame we're creating
  91                 mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
  92
  93                 // Set producer-specific frame properties
  94                 mlt_properties_set_int( properties, "progressive", 1 );
  95                 mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( producer_props, "aspect_ratio" ) );
  96
  97                 // Push the get_image method
  98                 mlt_frame_push_get_image( *frame, producer_get_image );
  99         }
 100
 101         // Calculate the next timecode
 102         mlt_producer_prepare_next( producer );
 103
 104         return 0;
 105 }
 106
 107 void producer_close( mlt_producer producer )
 108 {
 109         producer->close = NULL;
 110         mlt_producer_close( producer );
 111
 112         free( producer );
 113 }
 114
 115 mlt_producer producer_kdenlivetitle_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
 116 {
 117         // Create a new producer object
 118         mlt_producer this = mlt_producer_new( );
 119
 120         // Initialise the producer
 121
 122         if ( this != NULL )
 123         {
 124                 init_qt( arg );
 125                 // Callback registration
 126                 this->get_frame = producer_get_frame;
 127                 this->close = ( mlt_destructor ) producer_close;
 128                 mlt_properties properties = MLT_PRODUCER_PROPERTIES( this );
 129                 mlt_properties_set( properties, "resource", arg );
 130         }
 131
 132         return this;
 133 }
 134