--- /dev/null
+/*
+ * qimage_wrapper.cpp -- a QT/QImage based producer for MLT
+ * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
+ * Author: Charles Yates <charles.yates@gmail.com>
+ *
+ * NB: This module is designed to be functionally equivalent to the
+ * gtk2 image loading module so it can be used as replacement.
+ *
+ * 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 "qimage_wrapper.h"
+#include <qimage.h>
+#include <cmath>
+
+extern "C" {
+
+#include <framework/mlt_pool.h>
+
+static void qimage_delete( void *data )
+{
+ QImage *image = ( QImage * )data;
+ delete image;
+}
+
+static void clear_buffered_image( mlt_properties producer_props, uint8_t **current_image, uint8_t **current_alpha )
+{
+ mlt_events_block( producer_props, NULL );
+ mlt_properties_set_data( producer_props, "_qimage_image", NULL, 0, NULL, NULL );
+ mlt_properties_set_data( producer_props, "_qimage_alpha", NULL, 0, NULL, NULL );
+ *current_image = NULL;
+ *current_alpha = NULL;
+ mlt_events_unblock( producer_props, NULL );
+}
+
+static void assign_buffered_image( mlt_properties producer_props, uint8_t *current_image, uint8_t *current_alpha, int width, int height )
+{
+ mlt_events_block( producer_props, NULL );
+ mlt_properties_set_data( producer_props, "_qimage_image", current_image, 0, mlt_pool_release, NULL );
+ mlt_properties_set_data( producer_props, "_qimage_alpha", current_alpha, 0, mlt_pool_release, NULL );
+ mlt_properties_set_int( producer_props, "_qimage_width", width );
+ mlt_properties_set_int( producer_props, "_qimage_height", height );
+ mlt_events_unblock( producer_props, NULL );
+}
+
+void refresh_qimage( mlt_frame frame, int width, int height )
+{
+ // Obtain a previous assigned qimage (if it exists)
+ QImage *qimage = ( QImage * )mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "qimage", NULL );
+
+ // Obtain properties of frame
+ mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
+
+ // Obtain the producer for this frame
+ producer_qimage self = ( producer_qimage )mlt_properties_get_data( properties, "producer_qimage", NULL );
+
+ // Obtain the producer
+ mlt_producer producer = &self->parent;
+
+ // Obtain properties of producer
+ mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
+
+ // Retrieve current info if available
+ uint8_t *current_image = ( uint8_t * )mlt_properties_get_data( producer_props, "_qimage_image", NULL );
+ uint8_t *current_alpha = ( uint8_t * )mlt_properties_get_data( producer_props, "_qimage_alpha", NULL );
+ int current_width = mlt_properties_get_int( producer_props, "_qimage_width" );
+ int current_height = mlt_properties_get_int( producer_props, "_qimage_height" );
+
+ // Get the time to live for each frame
+ double ttl = mlt_properties_get_int( producer_props, "ttl" );
+
+ // Get the original position of this frame
+ mlt_position position = mlt_properties_get_position( properties, "qimage_position" );
+
+ // Image index
+ int image_idx = ( int )floor( ( double )position / ttl ) % self->count;
+
+ // optimization for subsequent iterations on single picture
+ if ( width != 0 && current_image != NULL && image_idx == self->image_idx )
+ {
+ if ( width != current_width || height != current_height )
+ {
+ qimage = ( QImage * )mlt_properties_get_data( producer_props, "_qimage", NULL );
+ clear_buffered_image( producer_props, ¤t_image, ¤t_alpha );
+ }
+ }
+ else if ( qimage == NULL && ( current_image == NULL || image_idx != self->image_idx ) )
+ {
+ clear_buffered_image( producer_props, ¤t_image, ¤t_alpha );
+
+ self->image_idx = image_idx;
+ qimage = new QImage( mlt_properties_get_value( self->filenames, image_idx ) );
+
+ if ( !qimage->isNull( ) )
+ {
+ QImage *frame_copy = new QImage( *qimage );
+
+ // Store the width/height of the pixbuf
+ current_width = qimage->width( );
+ current_height = qimage->height( );
+
+ // Register qimage for destruction and reuse
+ mlt_events_block( producer_props, NULL );
+ mlt_properties_set_data( producer_props, "_qimage", qimage, 0, ( mlt_destructor )qimage_delete, NULL );
+ mlt_properties_set_data( MLT_FRAME_PROPERTIES( frame ), "qimage", frame_copy, 0, ( mlt_destructor )qimage_delete, NULL );
+ mlt_properties_set_int( producer_props, "_real_width", current_width );
+ mlt_properties_set_int( producer_props, "_real_height", current_height );
+ mlt_events_unblock( producer_props, NULL );
+ }
+ else
+ {
+ delete qimage;
+ qimage = NULL;
+ }
+ }
+
+ // If we have a pixbuf and this request specifies a valid dimension and we haven't already got a cached version...
+ if ( qimage && width > 0 && current_image == NULL )
+ {
+ char *interps = mlt_properties_get( properties, "rescale.interp" );
+ int interp = 0;
+
+ // QImage has two scaling modes - we'll toggle between them here
+ if ( strcmp( interps, "tiles" ) == 0 )
+ interp = 1;
+ else if ( strcmp( interps, "hyper" ) == 0 )
+ interp = 1;
+
+ // Note - the original qimage is already safe and ready for destruction
+ QImage scaled = interp == 0 ? qimage->scale( width, height, QImage::ScaleFree ) : qimage->smoothScale( width, height, QImage::ScaleFree );
+ QImage temp = scaled.convertDepth( 32 );
+
+ // Store width and height
+ current_width = width;
+ current_height = height;
+
+ // Allocate/define image
+ current_image = ( uint8_t * )mlt_pool_alloc( width * ( height + 1 ) * 2 );
+
+ // Allocate the alpha mask
+ current_alpha = ( uint8_t * )mlt_pool_alloc( current_width * current_height );
+
+ // Convert the image
+ mlt_convert_bgr24a_to_yuv422( temp.bits( ), current_width, current_height, temp.bytesPerLine( ), current_image, current_alpha );
+
+ assign_buffered_image( producer_props, current_image, current_alpha, current_width, current_height );
+ }
+
+ // Set width/height of frame
+ mlt_properties_set_int( properties, "width", current_width );
+ mlt_properties_set_int( properties, "height", current_height );
+ mlt_properties_set_int( properties, "real_width", mlt_properties_get_int( producer_props, "_real_width" ) );
+ mlt_properties_set_int( properties, "real_height", mlt_properties_get_int( producer_props, "_real_height" ) );
+
+ // pass the image data without destructor
+ mlt_properties_set_data( properties, "image", current_image, current_width * ( current_height + 1 ) * 2, NULL, NULL );
+ mlt_properties_set_data( properties, "alpha", current_alpha, current_width * current_height, NULL, NULL );
+}
+
+}
+
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