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
  25 extern void refresh_kdenlivetitle( mlt_producer producer, uint8_t*, int, int, double, int );
  26
  27 void read_xml(mlt_properties properties)
  28 {
  29         FILE *f = fopen( mlt_properties_get( properties, "resource" ), "r");
  30         if ( f != NULL )
  31         {
  32                 int size = 0;
  33                 long lSize;
  34
  35                 fseek (f , 0 , SEEK_END);
  36                 lSize = ftell (f);
  37                 rewind (f);
  38
  39                 char *infile = (char*) mlt_pool_alloc(lSize);
  40                 size=fread(infile,1,lSize,f);
  41                 infile[size] = '\0';
  42                 fclose(f);
  43                 mlt_properties_set(properties, "xmldata", infile);
  44                 mlt_pool_release( infile );
  45         }
  46 }
  47
  48 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
  49 {
  50         /* Obtain properties of frame */
  51         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
  52
  53         /* Obtain the producer for this frame */
  54         mlt_producer producer = mlt_properties_get_data( properties, "producer_kdenlivetitle", NULL );
  55
  56         /* Obtain properties of producer */
  57         mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
  58
  59         *width = mlt_properties_get_int( properties, "width" );
  60         *height = mlt_properties_get_int( properties, "height" );
  61
  62         /* Allocate the image */
  63         int size = *width * ( *height ) * 4;
  64
  65         *buffer = mlt_pool_alloc( size );
  66
  67         mlt_properties_set_int( properties, "width", *width );
  68         mlt_properties_set_int( properties, "height", *height );
  69
  70         /* cache later ?? */
  71
  72         if ( 1 )
  73         {
  74                 /* Allocate the image */
  75                 *format = mlt_image_rgb24a;
  76                 mlt_position in = mlt_producer_get_in( producer );
  77                 mlt_position out = mlt_producer_get_out( producer );
  78                 mlt_position time = mlt_producer_position( producer );
  79                 double position = ( double )( time - in ) / ( double )( out - in + 1 );
  80                 if ( mlt_properties_get_int( producer_props, "force_reload" ) ) {
  81                         if (mlt_properties_get_int( producer_props, "force_reload" ) > 1) read_xml(producer_props);
  82                         mlt_properties_set_int( producer_props, "force_reload", 0 );
  83                         refresh_kdenlivetitle( producer, *buffer, *width, *height, position, 1);
  84                 }
  85                 else refresh_kdenlivetitle( producer, *buffer, *width, *height, position, 0);
  86                 /* Update the frame */
  87                 mlt_properties_set_data( properties, "image", *buffer, size, mlt_pool_release, NULL );
  88
  89                 mlt_log_debug( MLT_PRODUCER_SERVICE( producer ), "width:%d height:%d %s\n", *width, *height, mlt_image_format_name( *format ) );
  90         }
  91
  92         return 0;
  93 }
  94
  95 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
  96
  97 {
  98
  99         /* Generate a frame */
 100         *frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
 101
 102         if ( *frame != NULL )
 103         {
 104                 /* Obtain properties of frame and producer */
 105                 mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
 106
 107                 /* Obtain properties of producer */
 108                 mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
 109
 110                 /* Set the producer on the frame properties */
 111                 mlt_properties_set_data( properties, "producer_kdenlivetitle", producer, 0, NULL, NULL );
 112
 113                 /* Update timecode on the frame we're creating */
 114                 mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
 115
 116                 /* Set producer-specific frame properties */
 117                 mlt_properties_set_int( properties, "progressive", 1 );
 118                 mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( producer_props, "aspect_ratio" ) );
 119
 120                 /* Push the get_image method */
 121                 mlt_frame_push_get_image( *frame, producer_get_image );
 122         }
 123
 124         /* Calculate the next timecode */
 125         mlt_producer_prepare_next( producer );
 126
 127         return 0;
 128 }
 129
 130 static void producer_close( mlt_producer producer )
 131 {
 132         /* fprintf(stderr, "::::::::::::::  CLOSING TITLE\n"); */
 133         producer->close = NULL;
 134         mlt_producer_close( producer );
 135         free( producer );
 136 }
 137
 138
 139 mlt_producer producer_kdenlivetitle_init( mlt_profile profile, mlt_service_type type, const char *id, char *filename )
 140 {
 141         /* fprintf(stderr, ":::::::::::: CREATE TITLE\n"); */
 142         /* Create a new producer object */
 143
 144         mlt_producer producer = calloc( 1, sizeof( struct mlt_producer_s ) );
 145         if ( producer != NULL && mlt_producer_init( producer, NULL ) == 0 )
 146         {
 147                 /* Get the properties interface */
 148                 mlt_properties properties = MLT_PRODUCER_PROPERTIES( producer );
 149                 /* Callback registration */
 150                 producer->get_frame = producer_get_frame;
 151                 producer->close = ( mlt_destructor )producer_close;
 152                 mlt_properties_set( properties, "resource", filename );
 153                 //mlt_properties_set_int( properties, "aspect_ratio", 1 );
 154                 read_xml(properties);
 155                 return producer;
 156         }
 157         free( producer );
 158         return NULL;
 159 }
 160