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