--- /dev/null
+/*
+ * producer_hold.c -- frame holding producer
+ * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
+ * Author: Charles Yates <charles.yates@pandora.be>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include "producer_hold.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <framework/mlt.h>
+
+// Forward references
+static int producer_get_frame( mlt_producer this, mlt_frame_ptr frame, int index );
+
+/** Constructor for the frame holding producer. Basically, all this producer does is
+ provide a producer wrapper for the requested producer, allows the specifcation of
+ the frame required and will then repeatedly obtain that frame for each get_frame
+ and get_image requested.
+*/
+
+mlt_producer producer_hold_init( char *arg )
+{
+ // Construct a new holding producer
+ mlt_producer this = mlt_producer_new( );
+
+ // Construct the requested producer via fezzik
+ mlt_producer producer = mlt_factory_producer( "fezzik", arg );
+
+ // Initialise the frame holding capabilities
+ if ( this != NULL && producer != NULL )
+ {
+ // Get the properties of this producer
+ mlt_properties properties = mlt_producer_properties( this );
+
+ // Store the producer
+ mlt_properties_set_data( properties, "producer", producer, 0, ( mlt_destructor )mlt_producer_close, NULL );
+
+ // Set frame, in, out and length for this producer
+ mlt_properties_set_position( properties, "frame", 0 );
+ mlt_properties_set_position( properties, "in", 0 );
+ mlt_properties_set_position( properties, "out", 25 );
+ mlt_properties_set_position( properties, "length", 15000 );
+
+ // Override the get_frame method
+ this->get_frame = producer_get_frame;
+ }
+ else
+ {
+ // Clean up (not sure which one failed, can't be bothered to find out, so close both)
+ mlt_producer_close( this );
+ mlt_producer_close( producer );
+
+ // Make sure we return NULL
+ this = NULL;
+ }
+
+ // Return this producer
+ return this;
+}
+
+static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
+{
+ // Get the properties of the frame
+ mlt_properties properties = mlt_frame_properties( frame );
+
+ // Obtain the real frame
+ mlt_frame real_frame = mlt_frame_pop_service( frame );
+
+ // We want distorted to ensure we don't hit the resize filter twice
+ mlt_properties_set_int( properties, "distort", 1 );
+
+ // Get the image from the real frame
+ mlt_frame_get_image( real_frame, buffer, format, width, height, writable );
+
+ // Set the values obtained on the frame
+ mlt_properties_set_data( properties, "image", *buffer, *width * *height * 2, NULL, NULL );
+ mlt_properties_set_int( properties, "width", *width );
+ mlt_properties_set_int( properties, "height", *height );
+
+ // We'll deinterlace on the downstream deinterlacer
+ mlt_properties_set_int( mlt_frame_properties( real_frame ), "consumer_deinterlace", 1 );
+
+ // All done
+ return 0;
+}
+
+static int producer_get_frame( mlt_producer this, mlt_frame_ptr frame, int index )
+{
+ // Get the properties of this producer
+ mlt_properties properties = mlt_producer_properties( this );
+
+ // Construct a new frame
+ *frame = mlt_frame_init( );
+
+ // If we have a frame, then stack the producer itself and the get_image method
+ if ( *frame != NULL )
+ {
+ // Define the real frame
+ mlt_frame real_frame = NULL;
+
+ // Get the producer
+ mlt_producer producer = mlt_properties_get_data( properties, "producer", NULL );
+
+ // Get the frame position requested
+ mlt_position position = mlt_properties_get_position( properties, "frame" );
+
+ // Seek the producer to the correct place
+ mlt_producer_seek( producer, position );
+
+ // Get the real frame
+ mlt_service_get_frame( mlt_producer_service( producer ), &real_frame, index );
+
+ // Ensure that the real frame gets wiped
+ mlt_properties_set_data( mlt_frame_properties( *frame ), "real_frame", real_frame, 0, ( mlt_destructor )mlt_frame_close, NULL );
+
+ // Stack the real frame and method
+ mlt_frame_push_service( *frame, real_frame );
+ mlt_frame_push_service( *frame, producer_get_image );
+
+ // Ensure that the consumer sees what the real frame has
+ mlt_properties_pass( mlt_frame_properties( *frame ), mlt_frame_properties( real_frame ), "" );
+
+ // Mirror the properties of the frame
+ mlt_properties_mirror( mlt_frame_properties( *frame ), mlt_frame_properties( real_frame ) );
+ }
+
+ // Move to the next position
+ mlt_producer_prepare_next( this );
+
+ return 0;
+}
projects / melted / blobdiff