2 * qimage_wrapper.cpp -- a QT/QImage based producer for MLT
3 * Copyright (C) 2006 Visual Media
4 * Author: Charles Yates <charles.yates@gmail.com>
6 * NB: This module is designed to be functionally equivalent to the
7 * gtk2 image loading module so it can be used as replacement.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software Foundation,
21 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 #include "qimage_wrapper.h"
31 #include <kinstance.h>
39 #include <QtGui/QImage>
40 #include <QtCore/QSysInfo>
41 #include <QtCore/QMutex>
49 #include <framework/mlt_pool.h>
52 static KInstance *instance = 0L;
55 static void qimage_delete( void *data )
57 QImage *image = ( QImage * )data;
61 if (instance) delete instance;
72 instance = new KInstance("qimage_prod");
73 KImageIO::registerFormats();
78 void refresh_qimage( mlt_frame frame, int width, int height )
80 // Obtain a previous assigned qimage (if it exists)
81 QImage *qimage = static_cast <QImage *>(mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "qimage", NULL ));
83 // Obtain properties of frame
84 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
86 // Obtain the producer for this frame
87 producer_qimage self = ( producer_qimage )mlt_properties_get_data( properties, "producer_qimage", NULL );
89 // Obtain the producer
90 mlt_producer producer = &self->parent;
92 // Obtain properties of producer
93 mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
95 // Check if user wants us to reload the image
96 if ( mlt_properties_get_int( producer_props, "force_reload" ) )
99 self->current_image = NULL;
100 mlt_properties_set_int( producer_props, "force_reload", 0 );
103 // Obtain the cache flag and structure
104 int use_cache = mlt_properties_get_int( producer_props, "cache" );
105 mlt_properties cache = ( mlt_properties )mlt_properties_get_data( producer_props, "_cache", NULL );
106 int update_cache = 0;
108 // Get the time to live for each frame
109 double ttl = mlt_properties_get_int( producer_props, "ttl" );
111 // Get the original position of this frame
112 mlt_position position = mlt_properties_get_position( properties, "qimage_position" );
113 position += mlt_producer_get_in( producer );
116 int image_idx = ( int )floor( ( double )position / ttl ) % self->count;
119 char image_key[ 10 ];
120 sprintf( image_key, "%d", image_idx );
124 // Check if the frame is already loaded
129 cache = mlt_properties_new( );
130 mlt_properties_set_data( producer_props, "_cache", cache, 0, ( mlt_destructor )mlt_properties_close, NULL );
133 mlt_frame cached = ( mlt_frame )mlt_properties_get_data( cache, image_key, NULL );
137 self->image_idx = image_idx;
138 mlt_properties cached_props = MLT_FRAME_PROPERTIES( cached );
139 self->current_width = mlt_properties_get_int( cached_props, "width" );
140 self->current_height = mlt_properties_get_int( cached_props, "height" );
141 mlt_properties_set_int( producer_props, "_real_width", mlt_properties_get_int( cached_props, "real_width" ) );
142 mlt_properties_set_int( producer_props, "_real_height", mlt_properties_get_int( cached_props, "real_height" ) );
143 self->current_image = ( uint8_t * )mlt_properties_get_data( cached_props, "image", NULL );
144 self->current_alpha = ( uint8_t * )mlt_properties_get_data( cached_props, "alpha", NULL );
146 if ( width != 0 && ( width != self->current_width || height != self->current_height ) )
147 self->current_image = NULL;
151 // optimization for subsequent iterations on single picture
152 if ( width != 0 && self->current_image != NULL && image_idx == self->image_idx )
154 if ( width != self->current_width || height != self->current_height )
156 qimage = static_cast<QImage *>(mlt_properties_get_data( producer_props, "_qimage", NULL ));
159 mlt_pool_release( self->current_image );
160 mlt_pool_release( self->current_alpha );
162 self->current_image = NULL;
163 self->current_alpha = NULL;
166 else if ( qimage == NULL && ( self->current_image == NULL || image_idx != self->image_idx ) )
170 mlt_pool_release( self->current_image );
171 mlt_pool_release( self->current_alpha );
173 self->current_image = NULL;
174 self->current_alpha = NULL;
176 self->image_idx = image_idx;
177 qimage = new QImage( mlt_properties_get_value( self->filenames, image_idx ) );
179 if ( !qimage->isNull( ) )
181 QImage *frame_copy = new QImage( *qimage );
183 // Store the width/height of the pixbuf
184 self->current_width = qimage->width( );
185 self->current_height = qimage->height( );
187 // Register qimage for destruction and reuse
188 mlt_events_block( producer_props, NULL );
189 mlt_properties_set_data( producer_props, "_qimage", qimage, 0, ( mlt_destructor )qimage_delete, NULL );
190 mlt_properties_set_data( MLT_FRAME_PROPERTIES( frame ), "qimage", frame_copy, 0, ( mlt_destructor )qimage_delete, NULL );
191 mlt_properties_set_int( producer_props, "_real_width", self->current_width );
192 mlt_properties_set_int( producer_props, "_real_height", self->current_height );
193 mlt_events_unblock( producer_props, NULL );
202 // If we have a pixbuf and this request specifies a valid dimension and we haven't already got a cached version...
203 if ( qimage && width > 0 && self->current_image == NULL )
205 char *interps = mlt_properties_get( properties, "rescale.interp" );
208 // QImage has two scaling modes - we'll toggle between them here
209 if ( strcmp( interps, "tiles" ) == 0 )
211 else if ( strcmp( interps, "hyper" ) == 0 )
215 // Note - the original qimage is already safe and ready for destruction
216 QImage scaled = interp == 0 ? qimage->scaled( QSize( width, height)) : qimage->scaled( QSize(width, height), Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
218 bool hasAlpha = scaled.hasAlphaChannel();
220 temp = scaled.convertToFormat(QImage::Format_ARGB32);
222 temp = scaled.convertToFormat(QImage::Format_RGB888);
226 // Note - the original qimage is already safe and ready for destruction
227 QImage scaled = interp == 0 ? qimage->scale( width, height, QImage::ScaleFree ) : qimage->smoothScale( width, height, QImage::ScaleFree );
228 QImage temp = scaled.convertDepth( 32 );
229 bool hasAlpha = true;
232 // Store width and height
233 self->current_width = width;
234 self->current_height = height;
236 // Allocate/define image
237 self->current_image = ( uint8_t * )mlt_pool_alloc( width * ( height + 1 ) * 2 );
241 mlt_convert_rgb24_to_yuv422( temp.bits(), self->current_width, self->current_height, temp.bytesPerLine(), self->current_image );
244 // Allocate the alpha mask
245 self->current_alpha = ( uint8_t * )mlt_pool_alloc( self->current_width * self->current_height );
247 if ( QSysInfo::ByteOrder == QSysInfo::BigEndian )
248 mlt_convert_argb_to_yuv422( temp.bits( ), self->current_width, self->current_height, temp.bytesPerLine(), self->current_image, self->current_alpha );
250 mlt_convert_bgr24a_to_yuv422( temp.bits( ), self->current_width, self->current_height, temp.bytesPerLine( ), self->current_image, self->current_alpha );
255 if ( QImage::systemByteOrder( ) == QImage::BigEndian )
256 mlt_convert_argb_to_yuv422( temp.bits( ), self->current_width, self->current_height, temp.bytesPerLine( ), self->current_image, self->current_alpha );
258 mlt_convert_bgr24a_to_yuv422( temp.bits( ), self->current_width, self->current_height, temp.bytesPerLine( ), self->current_image, self->current_alpha );
262 // Ensure we update the cache when we need to
263 update_cache = use_cache;
266 // Set width/height of frame
267 mlt_properties_set_int( properties, "width", self->current_width );
268 mlt_properties_set_int( properties, "height", self->current_height );
269 mlt_properties_set_int( properties, "real_width", mlt_properties_get_int( producer_props, "_real_width" ) );
270 mlt_properties_set_int( properties, "real_height", mlt_properties_get_int( producer_props, "_real_height" ) );
272 // pass the image data without destructor
273 mlt_properties_set_data( properties, "image", self->current_image, self->current_width * ( self->current_height + 1 ) * 2, NULL, NULL );
274 mlt_properties_set_data( properties, "alpha", self->current_alpha, self->current_width * self->current_height, NULL, NULL );
278 mlt_frame cached = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
279 mlt_properties cached_props = MLT_FRAME_PROPERTIES( cached );
280 mlt_properties_set_int( cached_props, "width", self->current_width );
281 mlt_properties_set_int( cached_props, "height", self->current_height );
282 mlt_properties_set_int( cached_props, "real_width", mlt_properties_get_int( producer_props, "_real_width" ) );
283 mlt_properties_set_int( cached_props, "real_height", mlt_properties_get_int( producer_props, "_real_height" ) );
284 mlt_properties_set_data( cached_props, "image", self->current_image, self->current_width * ( self->current_height + 1 ) * 2, mlt_pool_release, NULL );
285 mlt_properties_set_data( cached_props, "alpha", self->current_alpha, self->current_width * self->current_height, mlt_pool_release, NULL );
286 mlt_properties_set_data( cache, image_key, cached, 0, ( mlt_destructor )mlt_frame_close, NULL );