research.m1stereo.tv/gitweb/ - melted/blob - src/modules/qimage/producer_qimage.c

   1 /*
   2  * producer_image.c -- 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 <framework/mlt_producer.h>
  25 #include "qimage_wrapper.h"
  26
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <math.h>
  31 #include <sys/types.h>
  32 #include <sys/stat.h>
  33 #include <unistd.h>
  34
  35 static void load_filenames( producer_qimage this, mlt_properties producer_properties );
  36 static int producer_get_frame( mlt_producer parent, mlt_frame_ptr frame, int index );
  37 static void producer_close( mlt_producer parent );
  38
  39 mlt_producer producer_qimage_init( mlt_profile profile, mlt_service_type type, const char *id, char *filename )
  40 {
  41         producer_qimage this = calloc( sizeof( struct producer_qimage_s ), 1 );
  42         if ( this != NULL && mlt_producer_init( &this->parent, this ) == 0 )
  43         {
  44                 mlt_producer producer = &this->parent;
  45
  46                 // Get the properties interface
  47                 mlt_properties properties = MLT_PRODUCER_PROPERTIES( &this->parent );
  48
  49                 // Callback registration
  50 #ifdef USE_KDE
  51                 init_qimage();
  52 #endif
  53                 producer->get_frame = producer_get_frame;
  54                 producer->close = ( mlt_destructor )producer_close;
  55
  56                 // Set the default properties
  57                 mlt_properties_set( properties, "resource", filename );
  58                 mlt_properties_set_int( properties, "ttl", 25 );
  59                 mlt_properties_set_int( properties, "aspect_ratio", 1 );
  60                 mlt_properties_set_int( properties, "progressive", 1 );
  61
  62                 // Validate the resource
  63                 if ( filename )
  64                         load_filenames( this, properties );
  65                 if ( this->count )
  66                 {
  67                         mlt_frame frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
  68                         if ( frame )
  69                         {
  70                                 mlt_properties frame_properties = MLT_FRAME_PROPERTIES( frame );
  71                                 mlt_properties_set_data( frame_properties, "producer_qimage", this, 0, NULL, NULL );
  72                                 mlt_frame_set_position( frame, mlt_producer_position( producer ) );
  73                                 mlt_properties_set_position( frame_properties, "qimage_position", mlt_producer_position( producer ) );
  74                                 refresh_qimage( frame, 0, 0 );
  75                                 mlt_frame_close( frame );
  76                                 mlt_properties_set_data( properties, "_qimage", NULL, 0, NULL, NULL );
  77                         }
  78                 }
  79                 if ( this->current_width == 0 )
  80                 {
  81                         producer_close( producer );
  82                         producer = NULL;
  83                 }
  84                 return producer;
  85         }
  86         free( this );
  87         return NULL;
  88 }
  89
  90 static void load_filenames( producer_qimage this, mlt_properties producer_properties )
  91 {
  92         char *filename = mlt_properties_get( producer_properties, "resource" );
  93         this->filenames = mlt_properties_new( );
  94
  95         // Read xml string
  96         if ( strstr( filename, "<svg" ) )
  97         {
  98                 // Generate a temporary file for the svg
  99                 char fullname[ 1024 ] = "/tmp/mlt.XXXXXX";
 100                 int fd = mkstemp( fullname );
 101
 102                 if ( fd > -1 )
 103                 {
 104                         // Write the svg into the temp file
 105                         ssize_t remaining_bytes;
 106                         char *xml = filename;
 107
 108                         // Strip leading crap
 109                         while ( xml[0] != '<' )
 110                                 xml++;
 111
 112                         remaining_bytes = strlen( xml );
 113                         while ( remaining_bytes > 0 )
 114                                 remaining_bytes -= write( fd, xml + strlen( xml ) - remaining_bytes, remaining_bytes );
 115                         close( fd );
 116
 117                         mlt_properties_set( this->filenames, "0", fullname );
 118
 119                         // Teehe - when the producer closes, delete the temp file and the space allo
 120                         mlt_properties_set_data( producer_properties, "__temporary_file__", fullname, 0, ( mlt_destructor )unlink, NULL );
 121                 }
 122         }
 123         // Obtain filenames
 124         else if ( strchr( filename, '%' ) != NULL )
 125         {
 126                 // handle picture sequences
 127                 int i = mlt_properties_get_int( producer_properties, "begin" );
 128                 int gap = 0;
 129                 char full[1024];
 130                 int keyvalue = 0;
 131                 char key[ 50 ];
 132
 133                 while ( gap < 100 )
 134                 {
 135                         struct stat buf;
 136                         snprintf( full, 1023, filename, i ++ );
 137                         if ( stat( full, &buf ) == 0 )
 138                         {
 139                                 sprintf( key, "%d", keyvalue ++ );
 140                                 mlt_properties_set( this->filenames, key, full );
 141                                 gap = 0;
 142                         }
 143                         else
 144                         {
 145                                 gap ++;
 146                         }
 147                 }
 148         }
 149         else if ( strstr( filename, "/.all." ) != NULL )
 150         {
 151                 char wildcard[ 1024 ];
 152                 char *dir_name = strdup( filename );
 153                 char *extension = strrchr( dir_name, '.' );
 154
 155                 *( strstr( dir_name, "/.all." ) + 1 ) = '\0';
 156                 sprintf( wildcard, "*%s", extension );
 157
 158                 mlt_properties_dir_list( this->filenames, dir_name, wildcard, 1 );
 159
 160                 free( dir_name );
 161         }
 162         else
 163         {
 164                 mlt_properties_set( this->filenames, "0", filename );
 165         }
 166
 167         this->count = mlt_properties_count( this->filenames );
 168 }
 169
 170 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
 171 {
 172         // Obtain properties of frame
 173         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 174
 175         // We need to know the size of the image to clone it
 176         int image_size = 0;
 177         int alpha_size = 0;
 178
 179         // Alpha channel
 180         uint8_t *alpha = NULL;
 181
 182         *width = mlt_properties_get_int( properties, "rescale_width" );
 183         *height = mlt_properties_get_int( properties, "rescale_height" );
 184
 185         // Refresh the image
 186         refresh_qimage( frame, *width, *height );
 187
 188         // Get the image
 189         *buffer = mlt_properties_get_data( properties, "image", &image_size );
 190         alpha = mlt_properties_get_data( properties, "alpha", &alpha_size );
 191
 192         // Get width and height (may have changed during the refresh)
 193         *width = mlt_properties_get_int( properties, "width" );
 194         *height = mlt_properties_get_int( properties, "height" );
 195
 196         // NB: Cloning is necessary with this producer (due to processing of images ahead of use)
 197         // The fault is not in the design of mlt, but in the implementation of the qimage producer...
 198         if ( *buffer != NULL )
 199         {
 200                 if ( *format == mlt_image_yuv422 || *format == mlt_image_yuv420p )
 201                 {
 202                         // Clone the image and the alpha
 203                         uint8_t *image_copy = mlt_pool_alloc( image_size );
 204                         uint8_t *alpha_copy = mlt_pool_alloc( alpha_size );
 205
 206                         memcpy( image_copy, *buffer, image_size );
 207
 208                         // Copy or default the alpha
 209                         if ( alpha != NULL )
 210                                 memcpy( alpha_copy, alpha, alpha_size );
 211                         else
 212                                 memset( alpha_copy, 255, alpha_size );
 213
 214                         // Now update properties so we free the copy after
 215                         mlt_properties_set_data( properties, "image", image_copy, image_size, mlt_pool_release, NULL );
 216                         mlt_properties_set_data( properties, "alpha", alpha_copy, alpha_size, mlt_pool_release, NULL );
 217
 218                         // We're going to pass the copy on
 219                         *buffer = image_copy;
 220                 }
 221                 else if ( *format == mlt_image_rgb24a )
 222                 {
 223                         // Clone the image and the alpha
 224                         image_size = *width * ( *height + 1 ) * 4;
 225                         alpha_size = *width * ( *height + 1 );
 226                         uint8_t *image_copy = mlt_pool_alloc( image_size );
 227                         uint8_t *alpha_copy = mlt_pool_alloc( alpha_size );
 228
 229                         mlt_convert_yuv422_to_rgb24a(*buffer, image_copy, (*width)*(*height));
 230
 231                         // Now update properties so we free the copy after
 232                         mlt_properties_set_data( properties, "image", image_copy, image_size, mlt_pool_release, NULL );
 233                         mlt_properties_set_data( properties, "alpha", alpha_copy, alpha_size, mlt_pool_release, NULL );
 234
 235                         // We're going to pass the copy on
 236                         *buffer = image_copy;
 237                 }
 238         }
 239         else
 240         {
 241                 // TODO: Review all cases of invalid images
 242                 *buffer = mlt_pool_alloc( 50 * 50 * 2 );
 243                 mlt_properties_set_data( properties, "image", *buffer, image_size, mlt_pool_release, NULL );
 244                 *width = 50;
 245                 *height = 50;
 246         }
 247
 248         return 0;
 249 }
 250
 251 static uint8_t *producer_get_alpha_mask( mlt_frame this )
 252 {
 253         // Obtain properties of frame
 254         mlt_properties properties = MLT_FRAME_PROPERTIES( this );
 255
 256         // Return the alpha mask
 257         return mlt_properties_get_data( properties, "alpha", NULL );
 258 }
 259
 260 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
 261 {
 262         // Get the real structure for this producer
 263         producer_qimage this = producer->child;
 264
 265         // Fetch the producers properties
 266         mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
 267
 268         if ( this->filenames == NULL && mlt_properties_get( producer_properties, "resource" ) != NULL )
 269                 load_filenames( this, producer_properties );
 270
 271         // Generate a frame
 272         *frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
 273
 274         if ( *frame != NULL && this->count > 0 )
 275         {
 276                 // Obtain properties of frame and producer
 277                 mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
 278
 279                 // Set the producer on the frame properties
 280                 mlt_properties_set_data( properties, "producer_qimage", this, 0, NULL, NULL );
 281
 282                 // Update timecode on the frame we're creating
 283                 mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
 284
 285                 // Ensure that we have a way to obtain the position in the get_image
 286                 mlt_properties_set_position( properties, "qimage_position", mlt_producer_position( producer ) );
 287
 288                 // Refresh the image
 289                 refresh_qimage( *frame, 0, 0 );
 290
 291                 // Set producer-specific frame properties
 292                 mlt_properties_set_int( properties, "progressive", mlt_properties_get_int( producer_properties, "progressive" ) );
 293                 mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( producer_properties, "aspect_ratio" ) );
 294
 295                 // Set alpha call back
 296                 ( *frame )->get_alpha_mask = producer_get_alpha_mask;
 297
 298                 // Push the get_image method
 299                 mlt_frame_push_get_image( *frame, producer_get_image );
 300         }
 301
 302         // Calculate the next timecode
 303         mlt_producer_prepare_next( producer );
 304
 305         return 0;
 306 }
 307
 308 static void producer_close( mlt_producer parent )
 309 {
 310         producer_qimage this = parent->child;
 311         parent->close = NULL;
 312         mlt_pool_release( this->current_image );
 313         mlt_pool_release( this->current_alpha );
 314         mlt_producer_close( parent );
 315         mlt_properties_close( this->filenames );
 316         free( this );
 317 }