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