git.sesse.net Git - mlt/blob - src/modules/qimage/qimage_wrapper.cpp

   1 /*
   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>
   5  *
   6  * NB: This module is designed to be functionally equivalent to the
   7  * gtk2 image loading module so it can be used as replacement.
   8  *
   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.
  13  *
  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.
  18  *
  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.
  22  */
  23
  24 #include "qimage_wrapper.h"
  25
  26 #ifdef USE_QT3
  27 #include <qimage.h>
  28 #include <qmutex.h>
  29
  30 #ifdef USE_KDE3
  31 #include <kinstance.h>
  32 #include <kimageio.h>
  33 #endif
  34 #endif
  35
  36 #ifdef USE_KDE4
  37 #include <kcomponentdata.h>
  38 #endif
  39
  40 #ifdef USE_QT4
  41 #include <QtGui/QImage>
  42 #include <QtCore/QSysInfo>
  43 #include <QtCore/QMutex>
  44 #include <QtCore/QtEndian>
  45 #include <QtCore/QTemporaryFile>
  46 #endif
  47
  48 #ifdef USE_EXIF
  49 #include <libexif/exif-data.h>
  50 #endif
  51
  52 #include <cmath>
  53 #include <unistd.h>
  54
  55 extern "C" {
  56
  57 #include <framework/mlt_pool.h>
  58 #include <framework/mlt_cache.h>
  59
  60 #ifdef USE_KDE4
  61 static KComponentData *instance = 0L;
  62 #elif USE_KDE3
  63 static KInstance *instance = 0L;
  64 #endif
  65
  66 static void qimage_delete( void *data )
  67 {
  68         QImage *image = ( QImage * )data;
  69         delete image;
  70         image = NULL;
  71 #if defined(USE_KDE3) || defined(USE_KDE4)
  72         if (instance) delete instance;
  73         instance = 0L;
  74 #endif
  75
  76 }
  77
  78 void init_qimage()
  79 {
  80 #ifdef USE_KDE4
  81         if ( !instance ) {
  82             instance = new KComponentData( "qimage_prod" );
  83         }
  84 #elif defined(USE_KDE3)
  85         if ( !instance ) {
  86             instance = new KInstance( "qimage_prod" );
  87             KImageIO::registerFormats();
  88         }
  89 #endif
  90
  91 }
  92
  93 static QImage* reorient_with_exif( producer_qimage self, int image_idx, QImage *qimage )
  94 {
  95 #ifdef USE_EXIF
  96         mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( &self->parent );
  97         ExifData *d = exif_data_new_from_file( mlt_properties_get_value( self->filenames, image_idx ) );
  98         ExifEntry *entry;
  99         int exif_orientation = 0;
 100         /* get orientation and rotate image accordingly if necessary */
 101         if (d) {
 102                 if ( ( entry = exif_content_get_entry ( d->ifd[EXIF_IFD_0], EXIF_TAG_ORIENTATION ) ) )
 103                         exif_orientation = exif_get_short (entry->data, exif_data_get_byte_order (d));
 104
 105                 /* Free the EXIF data */
 106                 exif_data_unref(d);
 107         }
 108
 109         // Remember EXIF value, might be useful for someone
 110         mlt_properties_set_int( producer_props, "_exif_orientation" , exif_orientation );
 111
 112         if ( exif_orientation > 1 )
 113         {
 114                   // Rotate image according to exif data
 115                   QImage processed;
 116                   QMatrix matrix;
 117
 118                   switch ( exif_orientation ) {
 119                   case 2:
 120                           matrix.scale( -1, 1 );
 121                           break;
 122                   case 3:
 123                           matrix.rotate( 180 );
 124                           break;
 125                   case 4:
 126                           matrix.scale( 1, -1 );
 127                           break;
 128                   case 5:
 129                           matrix.rotate( 270 );
 130                           matrix.scale( -1, 1 );
 131                           break;
 132                   case 6:
 133                           matrix.rotate( 90 );
 134                           break;
 135                   case 7:
 136                           matrix.rotate( 90 );
 137                           matrix.scale( -1, 1 );
 138                           break;
 139                   case 8:
 140                           matrix.rotate( 270 );
 141                           break;
 142                   }
 143                   processed = qimage->transformed( matrix );
 144                   delete qimage;
 145                   qimage = new QImage( processed );
 146         }
 147 #endif
 148         return qimage;
 149 }
 150
 151 int refresh_qimage( producer_qimage self, mlt_frame frame )
 152 {
 153         // Obtain properties of frame and producer
 154         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 155         mlt_producer producer = &self->parent;
 156         mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
 157
 158         // Check if user wants us to reload the image
 159         if ( mlt_properties_get_int( producer_props, "force_reload" ) )
 160         {
 161                 self->qimage = NULL;
 162                 self->current_image = NULL;
 163                 mlt_properties_set_int( producer_props, "force_reload", 0 );
 164         }
 165
 166         // Get the time to live for each frame
 167         double ttl = mlt_properties_get_int( producer_props, "ttl" );
 168
 169         // Get the original position of this frame
 170         mlt_position position = mlt_frame_original_position( frame );
 171         position += mlt_producer_get_in( producer );
 172
 173         // Image index
 174         int image_idx = ( int )floor( ( double )position / ttl ) % self->count;
 175
 176         // Key for the cache
 177         char image_key[ 10 ];
 178         sprintf( image_key, "%d", image_idx );
 179
 180         int disable_exif = mlt_properties_get_int( producer_props, "disable_exif" );
 181
 182         if ( image_idx != self->qimage_idx )
 183                 self->qimage = NULL;
 184         if ( !self->qimage || mlt_properties_get_int( producer_props, "_disable_exif" ) != disable_exif )
 185         {
 186                 self->current_image = NULL;
 187                 QImage *qimage = new QImage( mlt_properties_get_value( self->filenames, image_idx ) );
 188                 self->qimage = qimage;
 189
 190                 if ( !qimage->isNull( ) )
 191                 {
 192                         // Read the exif value for this file
 193                         if ( !disable_exif )
 194                                 qimage = reorient_with_exif( self, image_idx, qimage );
 195
 196                         // Register qimage for destruction and reuse
 197                         mlt_cache_item_close( self->qimage_cache );
 198                         mlt_service_cache_put( MLT_PRODUCER_SERVICE( producer ), "qimage.qimage", qimage, 0, ( mlt_destructor )qimage_delete );
 199                         self->qimage_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "qimage.qimage" );
 200                         self->qimage_idx = image_idx;
 201
 202                         // Store the width/height of the qimage
 203                         self->current_width = qimage->width( );
 204                         self->current_height = qimage->height( );
 205
 206                         mlt_events_block( producer_props, NULL );
 207                         mlt_properties_set_int( producer_props, "meta.media.width", self->current_width );
 208                         mlt_properties_set_int( producer_props, "meta.media.height", self->current_height );
 209                         mlt_properties_set_int( producer_props, "_disable_exif", disable_exif );
 210                         mlt_events_unblock( producer_props, NULL );
 211                 }
 212                 else
 213                 {
 214                         delete qimage;
 215                         self->qimage = NULL;
 216                 }
 217         }
 218
 219         // Set width/height of frame
 220         mlt_properties_set_int( properties, "width", self->current_width );
 221         mlt_properties_set_int( properties, "height", self->current_height );
 222
 223         return image_idx;
 224 }
 225
 226 void refresh_image( producer_qimage self, mlt_frame frame, mlt_image_format format, int width, int height )
 227 {
 228         // Obtain properties of frame and producer
 229         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 230         mlt_producer producer = &self->parent;
 231
 232         // Get index and qimage
 233         int image_idx = refresh_qimage( self, frame );
 234
 235         // optimization for subsequent iterations on single pictur
 236         if ( image_idx != self->image_idx || width != self->current_width || height != self->current_height )
 237                 self->current_image = NULL;
 238
 239         // If we have a qimage and need a new scaled image
 240         if ( self->qimage && ( !self->current_image || ( format != mlt_image_none  && format != self->format ) ) )
 241         {
 242                 char *interps = mlt_properties_get( properties, "rescale.interp" );
 243                 int interp = 0;
 244                 QImage *qimage = static_cast<QImage*>( self->qimage );
 245
 246                 // QImage has two scaling modes - we'll toggle between them here
 247                 if ( strcmp( interps, "tiles" ) == 0
 248                         || strcmp( interps, "hyper" ) == 0
 249                         || strcmp( interps, "bicubic" ) == 0 )
 250                         interp = 1;
 251
 252 #ifdef USE_QT4
 253                 // Note - the original qimage is already safe and ready for destruction
 254                 if ( qimage->depth() == 1 )
 255                 {
 256                         QImage temp = qimage->convertToFormat( QImage::Format_RGB32 );
 257                         delete qimage;
 258                         qimage = new QImage( temp );
 259                         self->qimage = qimage;
 260                 }
 261                 QImage scaled = interp == 0 ? qimage->scaled( QSize( width, height ) ) :
 262                         qimage->scaled( QSize(width, height), Qt::IgnoreAspectRatio, Qt::SmoothTransformation );
 263                 int has_alpha = scaled.hasAlphaChannel();
 264 #endif
 265
 266 #ifdef USE_QT3
 267                 // Note - the original qimage is already safe and ready for destruction
 268                 QImage scaled = interp == 0 ? qimage->scale( width, height, QImage::ScaleFree ) :
 269                         qimage->smoothScale( width, height, QImage::ScaleFree );
 270                 self->has_alpha = 1;
 271 #endif
 272
 273                 // Store width and height
 274                 self->current_width = width;
 275                 self->current_height = height;
 276
 277                 // Allocate/define image
 278                 int dst_stride = width * ( has_alpha ? 4 : 3 );
 279                 int image_size = dst_stride * ( height + 1 );
 280                 self->current_image = ( uint8_t * )mlt_pool_alloc( image_size );
 281                 self->current_alpha = NULL;
 282                 self->format = has_alpha ? mlt_image_rgb24a : mlt_image_rgb24;
 283
 284                 // Copy the image
 285                 int y = self->current_height + 1;
 286                 uint8_t *dst = self->current_image;
 287                 while ( --y )
 288                 {
 289                         QRgb *src = (QRgb*) scaled.scanLine( self->current_height - y );
 290                         int x = self->current_width + 1;
 291                         while ( --x )
 292                         {
 293                                 *dst++ = qRed(*src);
 294                                 *dst++ = qGreen(*src);
 295                                 *dst++ = qBlue(*src);
 296                                 if ( has_alpha ) *dst++ = qAlpha(*src);
 297                                 ++src;
 298                         }
 299                 }
 300
 301                 // Convert image to requested format
 302                 if ( format != mlt_image_none && format != self->format )
 303                 {
 304                         uint8_t *buffer = NULL;
 305
 306                         // First, set the image so it can be converted when we get it
 307                         mlt_frame_replace_image( frame, self->current_image, self->format, width, height );
 308                         mlt_frame_set_image( frame, self->current_image, image_size, mlt_pool_release );
 309                         self->format = format;
 310
 311                         // get_image will do the format conversion
 312                         mlt_frame_get_image( frame, &buffer, &format, &width, &height, 0 );
 313
 314                         // cache copies of the image and alpha buffers
 315                         if ( buffer )
 316                         {
 317                                 image_size = mlt_image_format_size( format, width, height, NULL );
 318                                 self->current_image = (uint8_t*) mlt_pool_alloc( image_size );
 319                                 memcpy( self->current_image, buffer, image_size );
 320                         }
 321                         if ( ( buffer = mlt_frame_get_alpha_mask( frame ) ) )
 322                         {
 323                                 self->current_alpha = (uint8_t*) mlt_pool_alloc( width * height );
 324                                 memcpy( self->current_alpha, buffer, width * height );
 325                         }
 326                 }
 327
 328                 // Update the cache
 329                 mlt_cache_item_close( self->image_cache );
 330                 mlt_service_cache_put( MLT_PRODUCER_SERVICE( producer ), "qimage.image", self->current_image, image_size, mlt_pool_release );
 331                 self->image_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "qimage.image" );
 332                 self->image_idx = image_idx;
 333                 mlt_cache_item_close( self->alpha_cache );
 334                 self->alpha_cache = NULL;
 335                 if ( self->current_alpha )
 336                 {
 337                         mlt_service_cache_put( MLT_PRODUCER_SERVICE( producer ), "qimage.alpha", self->current_alpha, width * height, mlt_pool_release );
 338                         self->alpha_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "qimage.alpha" );
 339                 }
 340         }
 341
 342         // Set width/height of frame
 343         mlt_properties_set_int( properties, "width", self->current_width );
 344         mlt_properties_set_int( properties, "height", self->current_height );
 345 }
 346
 347 extern void make_tempfile( producer_qimage self, const char *xml )
 348 {
 349         // Generate a temporary file for the svg
 350         QTemporaryFile tempFile( "mlt.XXXXXX" );
 351
 352         tempFile.setAutoRemove( false );
 353         if ( tempFile.open() )
 354         {
 355                 // Write the svg into the temp file
 356                 char *fullname = tempFile.fileName().toUtf8().data();
 357
 358                 // Strip leading crap
 359                 while ( xml[0] != '<' )
 360                         xml++;
 361
 362                 qint64 remaining_bytes = strlen( xml );
 363                 while ( remaining_bytes > 0 )
 364                         remaining_bytes -= tempFile.write( xml + strlen( xml ) - remaining_bytes, remaining_bytes );
 365                 tempFile.close();
 366
 367                 mlt_properties_set( self->filenames, "0", fullname );
 368
 369                 mlt_properties_set_data( MLT_PRODUCER_PROPERTIES( &self->parent ), "__temporary_file__",
 370                         fullname, 0, ( mlt_destructor )unlink, NULL );
 371         }
 372 }
 373
 374 } // extern "C"