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>
50 #include <framework/mlt_cache.h>
53 static KInstance *instance = 0L;
56 static void qimage_delete( void *data )
58 QImage *image = ( QImage * )data;
62 if (instance) delete instance;
67 static QMutex g_mutex;
73 instance = new KInstance("qimage_prod");
74 KImageIO::registerFormats();
79 void refresh_qimage( producer_qimage self, mlt_frame frame, int width, int height )
81 // Obtain properties of frame
82 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
84 // Obtain the producer
85 mlt_producer producer = &self->parent;
87 // Obtain properties of producer
88 mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
91 pthread_mutex_lock( &self->mutex );
92 mlt_cache_item qimage_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "qimage.qimage" );
93 QImage *qimage = static_cast<QImage*>( mlt_cache_item_data( qimage_cache, NULL ) );
95 // restore scaled image
96 self->image_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "qimage.image" );
97 self->current_image = static_cast<uint8_t*>( mlt_cache_item_data( self->image_cache, NULL ) );
99 // restore alpha channel
100 self->alpha_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "qimage.alpha" );
101 self->current_alpha = static_cast<uint8_t*>( mlt_cache_item_data( self->alpha_cache, NULL ) );
103 // Check if user wants us to reload the image
104 if ( mlt_properties_get_int( producer_props, "force_reload" ) )
107 self->current_image = NULL;
108 mlt_properties_set_int( producer_props, "force_reload", 0 );
111 // Obtain the cache flag and structure
112 int use_cache = mlt_properties_get_int( producer_props, "cache" );
113 mlt_properties cache = ( mlt_properties )mlt_properties_get_data( producer_props, "_cache", NULL );
114 int update_cache = 0;
116 // Get the time to live for each frame
117 double ttl = mlt_properties_get_int( producer_props, "ttl" );
119 // Get the original position of this frame
120 mlt_position position = mlt_properties_get_position( properties, "qimage_position" );
121 position += mlt_producer_get_in( producer );
124 int image_idx = ( int )floor( ( double )position / ttl ) % self->count;
127 char image_key[ 10 ];
128 sprintf( image_key, "%d", image_idx );
132 // Check if the frame is already loaded
137 cache = mlt_properties_new( );
138 mlt_properties_set_data( producer_props, "_cache", cache, 0, ( mlt_destructor )mlt_properties_close, NULL );
141 mlt_frame cached = ( mlt_frame )mlt_properties_get_data( cache, image_key, NULL );
145 self->image_idx = image_idx;
146 mlt_properties cached_props = MLT_FRAME_PROPERTIES( cached );
147 self->current_width = mlt_properties_get_int( cached_props, "width" );
148 self->current_height = mlt_properties_get_int( cached_props, "height" );
149 mlt_properties_set_int( producer_props, "_real_width", mlt_properties_get_int( cached_props, "real_width" ) );
150 mlt_properties_set_int( producer_props, "_real_height", mlt_properties_get_int( cached_props, "real_height" ) );
151 self->current_image = ( uint8_t * )mlt_properties_get_data( cached_props, "image", NULL );
152 self->current_alpha = ( uint8_t * )mlt_properties_get_data( cached_props, "alpha", NULL );
154 if ( width != 0 && ( width != self->current_width || height != self->current_height ) )
155 self->current_image = NULL;
159 // optimization for subsequent iterations on single picture
160 if ( width != 0 && ( image_idx != self->image_idx || width != self->current_width || height != self->current_height ) )
161 self->current_image = NULL;
162 if ( image_idx != self->qimage_idx )
164 if ( !qimage && !self->current_image )
166 self->current_image = NULL;
167 qimage = new QImage( mlt_properties_get_value( self->filenames, image_idx ) );
169 if ( !qimage->isNull( ) )
171 // Store the width/height of the qimage
172 self->current_width = qimage->width( );
173 self->current_height = qimage->height( );
175 // Register qimage for destruction and reuse
176 mlt_cache_item_close( qimage_cache );
177 mlt_service_cache_put( MLT_PRODUCER_SERVICE( producer ), "qimage.qimage", qimage, 0, ( mlt_destructor )qimage_delete );
178 qimage_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "qimage.qimage" );
179 self->qimage_idx = image_idx;
181 mlt_events_block( producer_props, NULL );
182 mlt_properties_set_int( producer_props, "_real_width", self->current_width );
183 mlt_properties_set_int( producer_props, "_real_height", self->current_height );
184 mlt_events_unblock( producer_props, NULL );
193 // If we have a pixbuf and this request specifies a valid dimension and we haven't already got a cached version...
194 if ( qimage && width > 0 && !self->current_image )
196 char *interps = mlt_properties_get( properties, "rescale.interp" );
199 // QImage has two scaling modes - we'll toggle between them here
200 if ( strcmp( interps, "tiles" ) == 0 )
202 else if ( strcmp( interps, "hyper" ) == 0 )
206 // Note - the original qimage is already safe and ready for destruction
207 QImage scaled = interp == 0 ? qimage->scaled( QSize( width, height)) : qimage->scaled( QSize(width, height), Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
209 bool hasAlpha = scaled.hasAlphaChannel();
211 temp = scaled.convertToFormat(QImage::Format_ARGB32);
213 temp = scaled.convertToFormat(QImage::Format_RGB888);
217 // Note - the original qimage is already safe and ready for destruction
218 QImage scaled = interp == 0 ? qimage->scale( width, height, QImage::ScaleFree ) : qimage->smoothScale( width, height, QImage::ScaleFree );
219 QImage temp = scaled.convertDepth( 32 );
220 bool hasAlpha = true;
223 // Store width and height
224 self->current_width = width;
225 self->current_height = height;
227 // Allocate/define image
228 self->current_image = ( uint8_t * )mlt_pool_alloc( width * ( height + 1 ) * 2 );
230 mlt_cache_item_close( self->image_cache );
231 mlt_service_cache_put( MLT_PRODUCER_SERVICE( producer ), "qimage.image", self->current_image, width * ( height + 1 ) * 2, mlt_pool_release );
232 self->image_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "qimage.image" );
233 self->image_idx = image_idx;
236 mlt_convert_rgb24_to_yuv422( temp.bits(), self->current_width, self->current_height, temp.bytesPerLine(), self->current_image );
239 // Allocate the alpha mask
240 self->current_alpha = ( uint8_t * )mlt_pool_alloc( width * height );
242 mlt_cache_item_close( self->alpha_cache );
243 mlt_service_cache_put( MLT_PRODUCER_SERVICE( producer ), "qimage.alpha", self->current_alpha, width * height, mlt_pool_release );
244 self->alpha_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "qimage.alpha" );
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 // release references no longer needed
267 mlt_cache_item_close( qimage_cache );
270 pthread_mutex_unlock( &self->mutex );
271 mlt_cache_item_close( self->image_cache );
272 mlt_cache_item_close( self->alpha_cache );
275 // Set width/height of frame
276 mlt_properties_set_int( properties, "width", self->current_width );
277 mlt_properties_set_int( properties, "height", self->current_height );
278 mlt_properties_set_int( properties, "real_width", mlt_properties_get_int( producer_props, "_real_width" ) );
279 mlt_properties_set_int( properties, "real_height", mlt_properties_get_int( producer_props, "_real_height" ) );
283 mlt_frame cached = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
284 mlt_properties cached_props = MLT_FRAME_PROPERTIES( cached );
285 mlt_properties_set_int( cached_props, "width", self->current_width );
286 mlt_properties_set_int( cached_props, "height", self->current_height );
287 mlt_properties_set_int( cached_props, "real_width", mlt_properties_get_int( producer_props, "_real_width" ) );
288 mlt_properties_set_int( cached_props, "real_height", mlt_properties_get_int( producer_props, "_real_height" ) );
289 mlt_properties_set_data( cached_props, "image", self->current_image, self->current_width * ( self->current_height + 1 ) * 2, mlt_pool_release, NULL );
290 mlt_properties_set_data( cached_props, "alpha", self->current_alpha, self->current_width * self->current_height, mlt_pool_release, NULL );
291 mlt_properties_set_data( cache, image_key, cached, 0, ( mlt_destructor )mlt_frame_close, NULL );