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 // Obtain the cache flag and structure
96 int use_cache
= mlt_properties_get_int( producer_props
, "cache" );
97 mlt_properties cache
= ( mlt_properties
)mlt_properties_get_data( producer_props
, "_cache", NULL
);
100 // Get the time to live for each frame
101 double ttl
= mlt_properties_get_int( producer_props
, "ttl" );
103 // Get the original position of this frame
104 mlt_position position
= mlt_properties_get_position( properties
, "qimage_position" );
105 position
+= mlt_producer_get_in( producer
);
108 int image_idx
= ( int )floor( ( double )position
/ ttl
) % self
->count
;
111 char image_key
[ 10 ];
112 sprintf( image_key
, "%d", image_idx
);
116 // Check if the frame is already loaded
121 cache
= mlt_properties_new( );
122 mlt_properties_set_data( producer_props
, "_cache", cache
, 0, ( mlt_destructor
)mlt_properties_close
, NULL
);
125 mlt_frame cached
= ( mlt_frame
)mlt_properties_get_data( cache
, image_key
, NULL
);
129 self
->image_idx
= image_idx
;
130 mlt_properties cached_props
= MLT_FRAME_PROPERTIES( cached
);
131 self
->current_width
= mlt_properties_get_int( cached_props
, "width" );
132 self
->current_height
= mlt_properties_get_int( cached_props
, "height" );
133 mlt_properties_set_int( producer_props
, "_real_width", mlt_properties_get_int( cached_props
, "real_width" ) );
134 mlt_properties_set_int( producer_props
, "_real_height", mlt_properties_get_int( cached_props
, "real_height" ) );
135 self
->current_image
= ( uint8_t * )mlt_properties_get_data( cached_props
, "image", NULL
);
136 self
->current_alpha
= ( uint8_t * )mlt_properties_get_data( cached_props
, "alpha", NULL
);
138 if ( width
!= 0 && ( width
!= self
->current_width
|| height
!= self
->current_height
) )
139 self
->current_image
= NULL
;
143 // optimization for subsequent iterations on single picture
144 if ( width
!= 0 && self
->current_image
!= NULL
&& image_idx
== self
->image_idx
)
146 if ( width
!= self
->current_width
|| height
!= self
->current_height
)
148 qimage
= static_cast<QImage
*>(mlt_properties_get_data( producer_props
, "_qimage", NULL
));
151 mlt_pool_release( self
->current_image
);
152 mlt_pool_release( self
->current_alpha
);
154 self
->current_image
= NULL
;
155 self
->current_alpha
= NULL
;
158 else if ( qimage
== NULL
&& ( self
->current_image
== NULL
|| image_idx
!= self
->image_idx
) )
162 mlt_pool_release( self
->current_image
);
163 mlt_pool_release( self
->current_alpha
);
165 self
->current_image
= NULL
;
166 self
->current_alpha
= NULL
;
168 self
->image_idx
= image_idx
;
169 qimage
= new QImage( mlt_properties_get_value( self
->filenames
, image_idx
) );
171 if ( !qimage
->isNull( ) )
173 QImage
*frame_copy
= new QImage( *qimage
);
175 // Store the width/height of the pixbuf
176 self
->current_width
= qimage
->width( );
177 self
->current_height
= qimage
->height( );
179 // Register qimage for destruction and reuse
180 mlt_events_block( producer_props
, NULL
);
181 mlt_properties_set_data( producer_props
, "_qimage", qimage
, 0, ( mlt_destructor
)qimage_delete
, NULL
);
182 mlt_properties_set_data( MLT_FRAME_PROPERTIES( frame
), "qimage", frame_copy
, 0, ( mlt_destructor
)qimage_delete
, NULL
);
183 mlt_properties_set_int( producer_props
, "_real_width", self
->current_width
);
184 mlt_properties_set_int( producer_props
, "_real_height", self
->current_height
);
185 mlt_events_unblock( producer_props
, NULL
);
194 // If we have a pixbuf and this request specifies a valid dimension and we haven't already got a cached version...
195 if ( qimage
&& width
> 0 && self
->current_image
== NULL
)
197 char *interps
= mlt_properties_get( properties
, "rescale.interp" );
200 // QImage has two scaling modes - we'll toggle between them here
201 if ( strcmp( interps
, "tiles" ) == 0 )
203 else if ( strcmp( interps
, "hyper" ) == 0 )
207 // Note - the original qimage is already safe and ready for destruction
208 QImage scaled
= interp
== 0 ? qimage
->scaled( QSize( width
, height
)) : qimage
->scaled( QSize(width
, height
), Qt
::IgnoreAspectRatio
, Qt
::SmoothTransformation
);
210 bool hasAlpha
= scaled
.hasAlphaChannel();
212 temp
= scaled
.convertToFormat(QImage
::Format_ARGB32
);
214 temp
= scaled
.convertToFormat(QImage
::Format_RGB888
);
218 // Note - the original qimage is already safe and ready for destruction
219 QImage scaled
= interp
== 0 ? qimage
->scale( width
, height
, QImage
::ScaleFree
) : qimage
->smoothScale( width
, height
, QImage
::ScaleFree
);
220 QImage temp
= scaled
.convertDepth( 32 );
221 bool hasAlpha
= true;
224 // Store width and height
225 self
->current_width
= width
;
226 self
->current_height
= height
;
228 // Allocate/define image
229 self
->current_image
= ( uint8_t * )mlt_pool_alloc( width
* ( height
+ 1 ) * 2 );
233 mlt_convert_rgb24_to_yuv422( temp
.bits(), self
->current_width
, self
->current_height
, temp
.bytesPerLine(), self
->current_image
);
236 // Allocate the alpha mask
237 self
->current_alpha
= ( uint8_t * )mlt_pool_alloc( self
->current_width
* self
->current_height
);
239 if ( QSysInfo
::ByteOrder
== QSysInfo
::BigEndian
)
240 mlt_convert_argb_to_yuv422( temp
.bits( ), self
->current_width
, self
->current_height
, temp
.bytesPerLine(), self
->current_image
, self
->current_alpha
);
242 mlt_convert_bgr24a_to_yuv422( temp
.bits( ), self
->current_width
, self
->current_height
, temp
.bytesPerLine( ), self
->current_image
, self
->current_alpha
);
247 if ( QImage
::systemByteOrder( ) == QImage
::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
);
254 // Ensure we update the cache when we need to
255 update_cache
= use_cache
;
258 // Set width/height of frame
259 mlt_properties_set_int( properties
, "width", self
->current_width
);
260 mlt_properties_set_int( properties
, "height", self
->current_height
);
261 mlt_properties_set_int( properties
, "real_width", mlt_properties_get_int( producer_props
, "_real_width" ) );
262 mlt_properties_set_int( properties
, "real_height", mlt_properties_get_int( producer_props
, "_real_height" ) );
264 // pass the image data without destructor
265 mlt_properties_set_data( properties
, "image", self
->current_image
, self
->current_width
* ( self
->current_height
+ 1 ) * 2, NULL
, NULL
);
266 mlt_properties_set_data( properties
, "alpha", self
->current_alpha
, self
->current_width
* self
->current_height
, NULL
, NULL
);
270 mlt_frame cached
= mlt_frame_init( MLT_PRODUCER_SERVICE( producer
) );
271 mlt_properties cached_props
= MLT_FRAME_PROPERTIES( cached
);
272 mlt_properties_set_int( cached_props
, "width", self
->current_width
);
273 mlt_properties_set_int( cached_props
, "height", self
->current_height
);
274 mlt_properties_set_int( cached_props
, "real_width", mlt_properties_get_int( producer_props
, "_real_width" ) );
275 mlt_properties_set_int( cached_props
, "real_height", mlt_properties_get_int( producer_props
, "_real_height" ) );
276 mlt_properties_set_data( cached_props
, "image", self
->current_image
, self
->current_width
* ( self
->current_height
+ 1 ) * 2, mlt_pool_release
, NULL
);
277 mlt_properties_set_data( cached_props
, "alpha", self
->current_alpha
, self
->current_width
* self
->current_height
, mlt_pool_release
, NULL
);
278 mlt_properties_set_data( cache
, image_key
, cached
, 0, ( mlt_destructor
)mlt_frame_close
, NULL
);