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 <QtGui/QApplication>
  44 #include <QtCore/QMutex>
  45 #include <QtCore/QtEndian>
  46 #include <QtCore/QTemporaryFile>
  47 #include <QtCore/QLocale>
  48 #endif
  49
  50 #ifdef USE_EXIF
  51 #include <libexif/exif-data.h>
  52 #endif
  53
  54 #include <cmath>
  55 #include <unistd.h>
  56
  57 extern "C" {
  58
  59 #include <framework/mlt_pool.h>
  60 #include <framework/mlt_cache.h>
  61
  62 #ifdef USE_KDE4
  63 static KComponentData *instance = 0L;
  64 #elif USE_KDE3
  65 static KInstance *instance = 0L;
  66 #endif
  67
  68 static QApplication *app = NULL;
  69
  70 static void qimage_delete( void *data )
  71 {
  72         QImage *image = ( QImage * )data;
  73         delete image;
  74         image = NULL;
  75 #if defined(USE_KDE3) || defined(USE_KDE4)
  76         if (instance) delete instance;
  77         instance = 0L;
  78 #endif
  79
  80 }
  81
  82 void init_qimage()
  83 {
  84 #ifdef USE_KDE4
  85         if ( !instance ) {
  86             instance = new KComponentData( "qimage_prod" );
  87         }
  88 #elif defined(USE_KDE3)
  89         if ( !instance ) {
  90             instance = new KInstance( "qimage_prod" );
  91             KImageIO::registerFormats();
  92         }
  93 #endif
  94
  95 }
  96
  97 static QImage* reorient_with_exif( producer_qimage self, int image_idx, QImage *qimage )
  98 {
  99 #ifdef USE_EXIF
 100         mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( &self->parent );
 101         ExifData *d = exif_data_new_from_file( mlt_properties_get_value( self->filenames, image_idx ) );
 102         ExifEntry *entry;
 103         int exif_orientation = 0;
 104         /* get orientation and rotate image accordingly if necessary */
 105         if (d) {
 106                 if ( ( entry = exif_content_get_entry ( d->ifd[EXIF_IFD_0], EXIF_TAG_ORIENTATION ) ) )
 107                         exif_orientation = exif_get_short (entry->data, exif_data_get_byte_order (d));
 108
 109                 /* Free the EXIF data */
 110                 exif_data_unref(d);
 111         }
 112
 113         // Remember EXIF value, might be useful for someone
 114         mlt_properties_set_int( producer_props, "_exif_orientation" , exif_orientation );
 115
 116         if ( exif_orientation > 1 )
 117         {
 118                   // Rotate image according to exif data
 119                   QImage processed;
 120                   QMatrix matrix;
 121
 122                   switch ( exif_orientation ) {
 123                   case 2:
 124                           matrix.scale( -1, 1 );
 125                           break;
 126                   case 3:
 127                           matrix.rotate( 180 );
 128                           break;
 129                   case 4:
 130                           matrix.scale( 1, -1 );
 131                           break;
 132                   case 5:
 133                           matrix.rotate( 270 );
 134                           matrix.scale( -1, 1 );
 135                           break;
 136                   case 6:
 137                           matrix.rotate( 90 );
 138                           break;
 139                   case 7:
 140                           matrix.rotate( 90 );
 141                           matrix.scale( -1, 1 );
 142                           break;
 143                   case 8:
 144                           matrix.rotate( 270 );
 145                           break;
 146                   }
 147                   processed = qimage->transformed( matrix );
 148                   delete qimage;
 149                   qimage = new QImage( processed );
 150         }
 151 #endif
 152         return qimage;
 153 }
 154
 155 int refresh_qimage( producer_qimage self, mlt_frame frame )
 156 {
 157         // Obtain properties of frame and producer
 158         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 159         mlt_producer producer = &self->parent;
 160         mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
 161
 162         // Check if user wants us to reload the image
 163         if ( mlt_properties_get_int( producer_props, "force_reload" ) )
 164         {
 165                 self->qimage = NULL;
 166                 self->current_image = NULL;
 167                 mlt_properties_set_int( producer_props, "force_reload", 0 );
 168         }
 169
 170         // Get the time to live for each frame
 171         double ttl = mlt_properties_get_int( producer_props, "ttl" );
 172
 173         // Get the original position of this frame
 174         mlt_position position = mlt_frame_original_position( frame );
 175         position += mlt_producer_get_in( producer );
 176
 177         // Image index
 178         int image_idx = ( int )floor( ( double )position / ttl ) % self->count;
 179
 180         // Key for the cache
 181         char image_key[ 10 ];
 182         sprintf( image_key, "%d", image_idx );
 183
 184         int disable_exif = mlt_properties_get_int( producer_props, "disable_exif" );
 185
 186
 187         if ( app == NULL )
 188         {
 189                 if ( qApp )
 190                 {
 191                         app = qApp;
 192                 }
 193                 else
 194                 {
 195 #ifdef linux
 196                         if ( getenv("DISPLAY") == 0 )
 197                         {
 198                                 mlt_log_panic( MLT_PRODUCER_SERVICE( producer ), "Error, cannot render titles without an X11 environment.\nPlease either run melt from an X session or use a fake X server like xvfb:\nxvfb-run -a melt (...)\n" );
 199                                 return -1;
 200                         }
 201 #endif
 202                         int argc = 1;
 203                         char* argv[1];
 204                         argv[0] = (char*) "xxx";
 205                         app = new QApplication( argc, argv );
 206                         const char *localename = mlt_properties_get_lcnumeric( MLT_SERVICE_PROPERTIES( MLT_PRODUCER_SERVICE( producer ) ) );
 207                         QLocale::setDefault( QLocale( localename ) );
 208                 }
 209         }
 210
 211         if ( image_idx != self->qimage_idx )
 212                 self->qimage = NULL;
 213         if ( !self->qimage || mlt_properties_get_int( producer_props, "_disable_exif" ) != disable_exif )
 214         {
 215                 self->current_image = NULL;
 216                 QImage *qimage = new QImage( QString::fromUtf8( mlt_properties_get_value( self->filenames, image_idx ) ) );
 217                 self->qimage = qimage;
 218
 219                 if ( !qimage->isNull( ) )
 220                 {
 221                         // Read the exif value for this file
 222                         if ( !disable_exif )
 223                                 qimage = reorient_with_exif( self, image_idx, qimage );
 224
 225                         // Register qimage for destruction and reuse
 226                         mlt_cache_item_close( self->qimage_cache );
 227                         mlt_service_cache_put( MLT_PRODUCER_SERVICE( producer ), "qimage.qimage", qimage, 0, ( mlt_destructor )qimage_delete );
 228                         self->qimage_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "qimage.qimage" );
 229                         self->qimage_idx = image_idx;
 230
 231                         // Store the width/height of the qimage
 232                         self->current_width = qimage->width( );
 233                         self->current_height = qimage->height( );
 234
 235                         mlt_events_block( producer_props, NULL );
 236                         mlt_properties_set_int( producer_props, "meta.media.width", self->current_width );
 237                         mlt_properties_set_int( producer_props, "meta.media.height", self->current_height );
 238                         mlt_properties_set_int( producer_props, "_disable_exif", disable_exif );
 239                         mlt_events_unblock( producer_props, NULL );
 240                 }
 241                 else
 242                 {
 243                         delete qimage;
 244                         self->qimage = NULL;
 245                 }
 246         }
 247
 248         // Set width/height of frame
 249         mlt_properties_set_int( properties, "width", self->current_width );
 250         mlt_properties_set_int( properties, "height", self->current_height );
 251
 252         return image_idx;
 253 }
 254
 255 void refresh_image( producer_qimage self, mlt_frame frame, mlt_image_format format, int width, int height )
 256 {
 257         // Obtain properties of frame and producer
 258         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 259         mlt_producer producer = &self->parent;
 260
 261         // Get index and qimage
 262         int image_idx = refresh_qimage( self, frame );
 263
 264         // optimization for subsequent iterations on single pictur
 265         if ( image_idx != self->image_idx || width != self->current_width || height != self->current_height )
 266                 self->current_image = NULL;
 267
 268         // If we have a qimage and need a new scaled image
 269         if ( self->qimage && ( !self->current_image || ( format != mlt_image_none  && format != self->format ) ) )
 270         {
 271                 char *interps = mlt_properties_get( properties, "rescale.interp" );
 272                 int interp = 0;
 273                 QImage *qimage = static_cast<QImage*>( self->qimage );
 274
 275                 // QImage has two scaling modes - we'll toggle between them here
 276                 if ( strcmp( interps, "tiles" ) == 0
 277                         || strcmp( interps, "hyper" ) == 0
 278                         || strcmp( interps, "bicubic" ) == 0 )
 279                         interp = 1;
 280
 281 #ifdef USE_QT4
 282                 // Note - the original qimage is already safe and ready for destruction
 283                 if ( qimage->depth() == 1 )
 284                 {
 285                         QImage temp = qimage->convertToFormat( QImage::Format_RGB32 );
 286                         delete qimage;
 287                         qimage = new QImage( temp );
 288                         self->qimage = qimage;
 289                 }
 290                 QImage scaled = interp == 0 ? qimage->scaled( QSize( width, height ) ) :
 291                         qimage->scaled( QSize(width, height), Qt::IgnoreAspectRatio, Qt::SmoothTransformation );
 292                 int has_alpha = scaled.hasAlphaChannel();
 293 #endif
 294
 295 #ifdef USE_QT3
 296                 // Note - the original qimage is already safe and ready for destruction
 297                 QImage scaled = interp == 0 ? qimage->scale( width, height, QImage::ScaleFree ) :
 298                         qimage->smoothScale( width, height, QImage::ScaleFree );
 299                 self->has_alpha = 1;
 300 #endif
 301
 302                 // Store width and height
 303                 self->current_width = width;
 304                 self->current_height = height;
 305
 306                 // Allocate/define image
 307                 int dst_stride = width * ( has_alpha ? 4 : 3 );
 308                 int image_size = dst_stride * ( height + 1 );
 309                 self->current_image = ( uint8_t * )mlt_pool_alloc( image_size );
 310                 self->current_alpha = NULL;
 311                 self->format = has_alpha ? mlt_image_rgb24a : mlt_image_rgb24;
 312
 313                 // Copy the image
 314                 int y = self->current_height + 1;
 315                 uint8_t *dst = self->current_image;
 316                 while ( --y )
 317                 {
 318                         QRgb *src = (QRgb*) scaled.scanLine( self->current_height - y );
 319                         int x = self->current_width + 1;
 320                         while ( --x )
 321                         {
 322                                 *dst++ = qRed(*src);
 323                                 *dst++ = qGreen(*src);
 324                                 *dst++ = qBlue(*src);
 325                                 if ( has_alpha ) *dst++ = qAlpha(*src);
 326                                 ++src;
 327                         }
 328                 }
 329
 330                 // Convert image to requested format
 331                 if ( format != mlt_image_none && format != self->format )
 332                 {
 333                         uint8_t *buffer = NULL;
 334
 335                         // First, set the image so it can be converted when we get it
 336                         mlt_frame_replace_image( frame, self->current_image, self->format, width, height );
 337                         mlt_frame_set_image( frame, self->current_image, image_size, mlt_pool_release );
 338                         self->format = format;
 339
 340                         // get_image will do the format conversion
 341                         mlt_frame_get_image( frame, &buffer, &format, &width, &height, 0 );
 342
 343                         // cache copies of the image and alpha buffers
 344                         if ( buffer )
 345                         {
 346                                 image_size = mlt_image_format_size( format, width, height, NULL );
 347                                 self->current_image = (uint8_t*) mlt_pool_alloc( image_size );
 348                                 memcpy( self->current_image, buffer, image_size );
 349                         }
 350                         if ( ( buffer = mlt_frame_get_alpha_mask( frame ) ) )
 351                         {
 352                                 self->current_alpha = (uint8_t*) mlt_pool_alloc( width * height );
 353                                 memcpy( self->current_alpha, buffer, width * height );
 354                         }
 355                 }
 356
 357                 // Update the cache
 358                 mlt_cache_item_close( self->image_cache );
 359                 mlt_service_cache_put( MLT_PRODUCER_SERVICE( producer ), "qimage.image", self->current_image, image_size, mlt_pool_release );
 360                 self->image_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "qimage.image" );
 361                 self->image_idx = image_idx;
 362                 mlt_cache_item_close( self->alpha_cache );
 363                 self->alpha_cache = NULL;
 364                 if ( self->current_alpha )
 365                 {
 366                         mlt_service_cache_put( MLT_PRODUCER_SERVICE( producer ), "qimage.alpha", self->current_alpha, width * height, mlt_pool_release );
 367                         self->alpha_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "qimage.alpha" );
 368                 }
 369         }
 370
 371         // Set width/height of frame
 372         mlt_properties_set_int( properties, "width", self->current_width );
 373         mlt_properties_set_int( properties, "height", self->current_height );
 374 }
 375
 376 extern void make_tempfile( producer_qimage self, const char *xml )
 377 {
 378         // Generate a temporary file for the svg
 379         QTemporaryFile tempFile( "mlt.XXXXXX" );
 380
 381         tempFile.setAutoRemove( false );
 382         if ( tempFile.open() )
 383         {
 384                 // Write the svg into the temp file
 385                 char *fullname = tempFile.fileName().toUtf8().data();
 386
 387                 // Strip leading crap
 388                 while ( xml[0] != '<' )
 389                         xml++;
 390
 391                 qint64 remaining_bytes = strlen( xml );
 392                 while ( remaining_bytes > 0 )
 393                         remaining_bytes -= tempFile.write( xml + strlen( xml ) - remaining_bytes, remaining_bytes );
 394                 tempFile.close();
 395
 396                 mlt_properties_set( self->filenames, "0", fullname );
 397
 398                 mlt_properties_set_data( MLT_PRODUCER_PROPERTIES( &self->parent ), "__temporary_file__",
 399                         fullname, 0, ( mlt_destructor )unlink, NULL );
 400         }
 401 }
 402
 403 } // extern "C"