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  * Copyright (c) 2009 Jean-Baptiste Mardelle <jb@kdenlive.org>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library 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 GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  19  */
  20
  21 #include "kdenlivetitle_wrapper.h"
  22
  23 #include <framework/mlt.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26
  27
  28 void read_xml(mlt_properties properties)
  29 {
  30         FILE *f = fopen( mlt_properties_get( properties, "resource" ), "r");
  31         if ( f != NULL )
  32         {
  33                 int size = 0;
  34                 long lSize;
  35
  36                 fseek (f , 0 , SEEK_END);
  37                 lSize = ftell (f);
  38                 rewind (f);
  39
  40                 char *infile = (char*) mlt_pool_alloc(lSize);
  41                 size=fread(infile,1,lSize,f);
  42                 infile[size] = '\0';
  43                 fclose(f);
  44                 mlt_properties_set(properties, "xmldata", infile);
  45                 mlt_pool_release( infile );
  46         }
  47 }
  48
  49 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
  50 {
  51         /* Obtain properties of frame */
  52         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
  53
  54         /* Obtain the producer for this frame */
  55         producer_ktitle this = mlt_properties_get_data( properties, "producer_kdenlivetitle", NULL );
  56
  57         /* Obtain properties of producer */
  58         mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( &this->parent );
  59
  60         *width = mlt_properties_get_int( properties, "rescale_width" );
  61         *height = mlt_properties_get_int( properties, "rescale_height" );
  62
  63         /* Allocate the image */
  64         int size = *width * ( *height ) * 4;
  65
  66         /* Allocate the image */
  67         *format = mlt_image_rgb24a;
  68         mlt_position in = mlt_producer_get_in( &this->parent );
  69         mlt_position out = mlt_producer_get_out( &this->parent );
  70         mlt_position time = mlt_producer_position( &this->parent );
  71         double position = ( double )( time - in ) / ( double )( out - in + 1 );
  72         if ( mlt_properties_get_int( producer_props, "force_reload" ) ) {
  73                 if (mlt_properties_get_int( producer_props, "force_reload" ) > 1) read_xml(producer_props);
  74                 mlt_properties_set_int( producer_props, "force_reload", 0 );
  75                 drawKdenliveTitle( this, frame, *width, *height, position, 1);
  76         }
  77         else drawKdenliveTitle( this, frame, *width, *height, position, 0);
  78
  79         // Get width and height (may have changed during the refresh)
  80         *width = mlt_properties_get_int( properties, "width" );
  81         *height = mlt_properties_get_int( properties, "height" );
  82
  83         if ( this->current_image )
  84         {
  85                 // Clone the image and the alpha
  86                 int image_size = this->current_width * ( this->current_height ) * 4;
  87                 uint8_t *image_copy = mlt_pool_alloc( image_size );
  88                 memcpy( image_copy, this->current_image, image_size );
  89                 // Now update properties so we free the copy after
  90                 mlt_properties_set_data( properties, "image", image_copy, image_size, mlt_pool_release, NULL );
  91                 // We're going to pass the copy on
  92                 *buffer = image_copy;
  93
  94                 /* Update the frame */
  95                 mlt_properties_set_data( properties, "image", *buffer, size, mlt_pool_release, NULL );
  96
  97                 mlt_log_debug( MLT_PRODUCER_SERVICE( &this->parent ), "width:%d height:%d %s\n", *width, *height, mlt_image_format_name( *format ) );
  98         }
  99
 100         return 0;
 101 }
 102
 103 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
 104
 105 {
 106         // Get the real structure for this producer
 107         producer_ktitle this = producer->child;
 108
 109         /* Generate a frame */
 110         *frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
 111
 112         if ( *frame != NULL )
 113         {
 114                 /* Obtain properties of frame and producer */
 115                 mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
 116
 117                 /* Obtain properties of producer */
 118                 mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
 119
 120                 /* Set the producer on the frame properties */
 121                 mlt_properties_set_data( properties, "producer_kdenlivetitle", this, 0, NULL, NULL );
 122
 123                 /* Update timecode on the frame we're creating */
 124                 mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
 125
 126                 /* Set producer-specific frame properties */
 127                 mlt_properties_set_int( properties, "progressive", 1 );
 128                 mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( producer_props, "aspect_ratio" ) );
 129
 130                 /* Push the get_image method */
 131                 mlt_frame_push_get_image( *frame, producer_get_image );
 132         }
 133
 134         /* Calculate the next timecode */
 135         mlt_producer_prepare_next( producer );
 136
 137         return 0;
 138 }
 139
 140 static void producer_close( mlt_producer producer )
 141 {
 142         /* fprintf(stderr, "::::::::::::::  CLOSING TITLE\n"); */
 143         producer->close = NULL;
 144         mlt_producer_close( producer );
 145         free( producer );
 146 }
 147
 148
 149 mlt_producer producer_kdenlivetitle_init( mlt_profile profile, mlt_service_type type, const char *id, char *filename )
 150 {
 151         /* fprintf(stderr, ":::::::::::: CREATE TITLE\n"); */
 152         /* Create a new producer object */
 153
 154         producer_ktitle this = calloc( sizeof( struct producer_ktitle_s ), 1 );
 155         if ( this != NULL && mlt_producer_init( &this->parent, this ) == 0 )
 156         {
 157                 mlt_producer producer = &this->parent;
 158
 159                 /* Get the properties interface */
 160                 mlt_properties properties = MLT_PRODUCER_PROPERTIES( producer );
 161                 /* Callback registration */
 162                 producer->get_frame = producer_get_frame;
 163                 producer->close = ( mlt_destructor )producer_close;
 164                 mlt_properties_set( properties, "resource", filename );
 165                 //mlt_properties_set_int( properties, "aspect_ratio", 1 );
 166                 read_xml(properties);
 167                 return producer;
 168         }
 169         free( this );
 170         return NULL;
 171 }
 172