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                 if ( fseek (f , 0 , SEEK_END) < 0 )
  37                         goto error;
  38                 lSize = ftell (f);
  39                 if ( lSize <= 0 )
  40                         goto error;
  41                 rewind (f);
  42
  43                 char *infile = (char*) mlt_pool_alloc(lSize);
  44                 if ( infile )
  45                 {
  46                         size = fread(infile,1,lSize,f);
  47                         if ( size )
  48                         {
  49                                 infile[size] = '\0';
  50                                 mlt_properties_set(properties, "_xmldata", infile);
  51                         }
  52                         mlt_pool_release( infile );
  53                 }
  54 error:
  55                 fclose(f);
  56         }
  57 }
  58
  59 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
  60
  61 {
  62         /* Obtain properties of frame */
  63         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
  64
  65         /* Obtain the producer for this frame */
  66         producer_ktitle this = mlt_properties_get_data( properties, "producer_kdenlivetitle", NULL );
  67
  68         /* Obtain properties of producer */
  69         mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( &this->parent );
  70
  71         *width = mlt_properties_get_int( properties, "rescale_width" );
  72         *height = mlt_properties_get_int( properties, "rescale_height" );
  73
  74         mlt_service_lock( MLT_PRODUCER_SERVICE( &this->parent ) );
  75
  76         /* Allocate the image */
  77         *format = mlt_image_rgb24a;
  78         if ( mlt_properties_get_int( producer_props, "force_reload" ) ) {
  79                 if ( mlt_properties_get_int( producer_props, "force_reload" ) > 1 ) read_xml( producer_props );
  80                 mlt_properties_set_int( producer_props, "force_reload", 0 );
  81                 drawKdenliveTitle( this, frame, *width, *height, mlt_frame_original_position( frame ), 1);
  82         }
  83         else drawKdenliveTitle( this, frame, *width, *height, mlt_frame_original_position( frame ), 0);
  84
  85         // Get width and height (may have changed during the refresh)
  86         *width = mlt_properties_get_int( properties, "width" );
  87         *height = mlt_properties_get_int( properties, "height" );
  88
  89         if ( this->current_image )
  90         {
  91                 // Clone the image and the alpha
  92                 int image_size = this->current_width * ( this->current_height ) * 4;
  93                 uint8_t *image_copy = mlt_pool_alloc( image_size );
  94                 memcpy( image_copy, this->current_image, image_size );
  95                 // Now update properties so we free the copy after
  96                 mlt_frame_set_image( frame, image_copy, image_size, mlt_pool_release );
  97                 // We're going to pass the copy on
  98                 *buffer = image_copy;
  99
 100                 mlt_log_debug( MLT_PRODUCER_SERVICE( &this->parent ), "width:%d height:%d %s\n", *width, *height, mlt_image_format_name( *format ) );
 101         }
 102
 103         mlt_service_unlock( MLT_PRODUCER_SERVICE( &this->parent ) );
 104
 105         return 0;
 106 }
 107
 108 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
 109
 110 {
 111         // Get the real structure for this producer
 112         producer_ktitle this = producer->child;
 113
 114         /* Generate a frame */
 115         *frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
 116
 117         if ( *frame != NULL )
 118         {
 119                 /* Obtain properties of frame and producer */
 120                 mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
 121
 122                 /* Obtain properties of producer */
 123                 mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
 124
 125                 /* Set the producer on the frame properties */
 126                 mlt_properties_set_data( properties, "producer_kdenlivetitle", this, 0, NULL, NULL );
 127
 128                 /* Update timecode on the frame we're creating */
 129                 mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
 130
 131                 /* Set producer-specific frame properties */
 132                 mlt_properties_pass_list( properties, producer_props, "progressive, aspect_ratio" );
 133
 134                 /* Push the get_image method */
 135                 mlt_frame_push_get_image( *frame, producer_get_image );
 136         }
 137
 138         /* Calculate the next timecode */
 139         mlt_producer_prepare_next( producer );
 140
 141         return 0;
 142 }
 143
 144 static void producer_close( mlt_producer producer )
 145 {
 146         /* fprintf(stderr, "::::::::::::::  CLOSING TITLE\n"); */
 147         producer->close = NULL;
 148         mlt_producer_close( producer );
 149         free( producer );
 150 }
 151
 152
 153 mlt_producer producer_kdenlivetitle_init( mlt_profile profile, mlt_service_type type, const char *id, char *filename )
 154 {
 155         /* fprintf(stderr, ":::::::::::: CREATE TITLE\n"); */
 156         /* Create a new producer object */
 157
 158         producer_ktitle this = calloc( 1, sizeof( struct producer_ktitle_s ) );
 159         if ( this != NULL && mlt_producer_init( &this->parent, this ) == 0 )
 160         {
 161                 mlt_producer producer = &this->parent;
 162
 163                 /* Get the properties interface */
 164                 mlt_properties properties = MLT_PRODUCER_PROPERTIES( producer );
 165                 /* Callback registration */
 166                 producer->get_frame = producer_get_frame;
 167                 producer->close = ( mlt_destructor )producer_close;
 168                 mlt_properties_set( properties, "resource", filename );
 169                 mlt_properties_set_int( properties, "progressive", 1 );
 170                 read_xml(properties);
 171                 return producer;
 172         }
 173         free( this );
 174         return NULL;
 175 }
 176