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 <framework/mlt_cache.h>
  26 #include "qimage_wrapper.h"
  27
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31 #include <math.h>
  32 #include <sys/types.h>
  33 #include <sys/stat.h>
  34 #include <unistd.h>
  35
  36 static void load_filenames( producer_qimage this, mlt_properties producer_properties );
  37 static int producer_get_frame( mlt_producer parent, mlt_frame_ptr frame, int index );
  38 static void producer_close( mlt_producer parent );
  39
  40 mlt_producer producer_qimage_init( mlt_profile profile, mlt_service_type type, const char *id, char *filename )
  41 {
  42         producer_qimage this = calloc( sizeof( struct producer_qimage_s ), 1 );
  43         if ( this != NULL && mlt_producer_init( &this->parent, this ) == 0 )
  44         {
  45                 mlt_producer producer = &this->parent;
  46
  47                 // Get the properties interface
  48                 mlt_properties properties = MLT_PRODUCER_PROPERTIES( &this->parent );
  49
  50                 // Callback registration
  51 #ifdef USE_KDE
  52                 init_qimage();
  53 #endif
  54                 producer->get_frame = producer_get_frame;
  55                 producer->close = ( mlt_destructor )producer_close;
  56
  57                 // Set the default properties
  58                 mlt_properties_set( properties, "resource", filename );
  59                 mlt_properties_set_int( properties, "ttl", 25 );
  60                 mlt_properties_set_int( properties, "aspect_ratio", 1 );
  61                 mlt_properties_set_int( properties, "progressive", 1 );
  62
  63                 // Validate the resource
  64                 if ( filename )
  65                         load_filenames( this, properties );
  66                 if ( this->count )
  67                 {
  68                         mlt_frame frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
  69                         if ( frame )
  70                         {
  71                                 mlt_properties frame_properties = MLT_FRAME_PROPERTIES( frame );
  72                                 pthread_mutex_init( &this->mutex, NULL );
  73                                 mlt_properties_set_data( frame_properties, "producer_qimage", this, 0, NULL, NULL );
  74                                 mlt_frame_set_position( frame, mlt_producer_position( producer ) );
  75                                 mlt_properties_set_position( frame_properties, "qimage_position", mlt_producer_position( producer ) );
  76                                 refresh_qimage( this, frame, 0, 0 );
  77                                 mlt_frame_close( frame );
  78                         }
  79                 }
  80                 if ( this->current_width == 0 )
  81                 {
  82                         producer_close( producer );
  83                         producer = NULL;
  84                 }
  85                 return producer;
  86         }
  87         free( this );
  88         return NULL;
  89 }
  90
  91 static void load_filenames( producer_qimage this, mlt_properties producer_properties )
  92 {
  93         char *filename = mlt_properties_get( producer_properties, "resource" );
  94         this->filenames = mlt_properties_new( );
  95
  96         // Read xml string
  97         if ( strstr( filename, "<svg" ) )
  98         {
  99                 // Generate a temporary file for the svg
 100                 char fullname[ 1024 ] = "/tmp/mlt.XXXXXX";
 101                 int fd = mkstemp( fullname );
 102
 103                 if ( fd > -1 )
 104                 {
 105                         // Write the svg into the temp file
 106                         ssize_t remaining_bytes;
 107                         char *xml = filename;
 108
 109                         // Strip leading crap
 110                         while ( xml[0] != '<' )
 111                                 xml++;
 112
 113                         remaining_bytes = strlen( xml );
 114                         while ( remaining_bytes > 0 )
 115                                 remaining_bytes -= write( fd, xml + strlen( xml ) - remaining_bytes, remaining_bytes );
 116                         close( fd );
 117
 118                         mlt_properties_set( this->filenames, "0", fullname );
 119
 120                         // Teehe - when the producer closes, delete the temp file and the space allo
 121                         mlt_properties_set_data( producer_properties, "__temporary_file__", fullname, 0, ( mlt_destructor )unlink, NULL );
 122                 }
 123         }
 124         // Obtain filenames
 125         else if ( strchr( filename, '%' ) != NULL )
 126         {
 127                 // handle picture sequences
 128                 int i = mlt_properties_get_int( producer_properties, "begin" );
 129                 int gap = 0;
 130                 char full[1024];
 131                 int keyvalue = 0;
 132                 char key[ 50 ];
 133
 134                 while ( gap < 100 )
 135                 {
 136                         struct stat buf;
 137                         snprintf( full, 1023, filename, i ++ );
 138                         if ( stat( full, &buf ) == 0 )
 139                         {
 140                                 sprintf( key, "%d", keyvalue ++ );
 141                                 mlt_properties_set( this->filenames, key, full );
 142                                 gap = 0;
 143                         }
 144                         else
 145                         {
 146                                 gap ++;
 147                         }
 148                 }
 149         }
 150         else if ( strstr( filename, "/.all." ) != NULL )
 151         {
 152                 char wildcard[ 1024 ];
 153                 char *dir_name = strdup( filename );
 154                 char *extension = strrchr( dir_name, '.' );
 155
 156                 *( strstr( dir_name, "/.all." ) + 1 ) = '\0';
 157                 sprintf( wildcard, "*%s", extension );
 158
 159                 mlt_properties_dir_list( this->filenames, dir_name, wildcard, 1 );
 160
 161                 free( dir_name );
 162         }
 163         else
 164         {
 165                 mlt_properties_set( this->filenames, "0", filename );
 166         }
 167
 168         this->count = mlt_properties_count( this->filenames );
 169 }
 170
 171 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
 172 {
 173         // Obtain properties of frame
 174         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 175
 176         // Obtain the producer for this frame
 177         producer_qimage this = mlt_properties_get_data( properties, "producer_qimage", NULL );
 178
 179         *width = mlt_properties_get_int( properties, "rescale_width" );
 180         *height = mlt_properties_get_int( properties, "rescale_height" );
 181
 182         // Refresh the image
 183         refresh_qimage( this, frame, *width, *height );
 184
 185         // We need to know the size of the image to clone it
 186         int image_size = this->current_width * ( this->current_height + 1 ) * 2;
 187         int alpha_size = this->current_width * this->current_height;
 188
 189         // Get width and height (may have changed during the refresh)
 190         *width = mlt_properties_get_int( properties, "width" );
 191         *height = mlt_properties_get_int( properties, "height" );
 192
 193         // NB: Cloning is necessary with this producer (due to processing of images ahead of use)
 194         // The fault is not in the design of mlt, but in the implementation of the qimage producer...
 195         if ( this->current_image != NULL )
 196         {
 197                 if ( *format == mlt_image_yuv422 || *format == mlt_image_yuv420p )
 198                 {
 199                         // Clone the image and the alpha
 200                         uint8_t *image_copy = mlt_pool_alloc( image_size );
 201                         uint8_t *alpha_copy = mlt_pool_alloc( alpha_size );
 202
 203                         memcpy( image_copy, this->current_image, image_size );
 204
 205                         // Copy or default the alpha
 206                         if ( this->current_alpha )
 207                                 memcpy( alpha_copy, this->current_alpha, alpha_size );
 208                         else
 209                                 memset( alpha_copy, 255, alpha_size );
 210
 211                         // Now update properties so we free the copy after
 212                         mlt_properties_set_data( properties, "image", image_copy, image_size, mlt_pool_release, NULL );
 213                         mlt_properties_set_data( properties, "alpha", alpha_copy, alpha_size, mlt_pool_release, NULL );
 214
 215                         // We're going to pass the copy on
 216                         *buffer = image_copy;
 217                 }
 218                 else if ( *format == mlt_image_rgb24a )
 219                 {
 220                         // Clone the image and the alpha
 221                         image_size = *width * ( *height + 1 ) * 4;
 222                         alpha_size = *width * ( *height + 1 );
 223                         uint8_t *image_copy = mlt_pool_alloc( image_size );
 224                         uint8_t *alpha_copy = mlt_pool_alloc( alpha_size );
 225
 226                         mlt_convert_yuv422_to_rgb24a(this->current_image, image_copy, (*width)*(*height));
 227
 228                         // Now update properties so we free the copy after
 229                         mlt_properties_set_data( properties, "image", image_copy, image_size, mlt_pool_release, NULL );
 230                         mlt_properties_set_data( properties, "alpha", alpha_copy, alpha_size, mlt_pool_release, NULL );
 231
 232                         // We're going to pass the copy on
 233                         *buffer = image_copy;
 234                 }
 235         }
 236         else
 237         {
 238                 // TODO: Review all cases of invalid images
 239                 *buffer = mlt_pool_alloc( 50 * 50 * 2 );
 240                 mlt_properties_set_data( properties, "image", *buffer, image_size, mlt_pool_release, NULL );
 241                 *width = 50;
 242                 *height = 50;
 243         }
 244
 245         // Release references and locks
 246         pthread_mutex_unlock( &this->mutex );
 247         mlt_cache_item_close( this->image_cache );
 248         mlt_cache_item_close( this->alpha_cache );
 249
 250         return 0;
 251 }
 252
 253 static uint8_t *producer_get_alpha_mask( mlt_frame this )
 254 {
 255         // Obtain properties of frame
 256         mlt_properties properties = MLT_FRAME_PROPERTIES( this );
 257
 258         // Return the alpha mask
 259         return mlt_properties_get_data( properties, "alpha", NULL );
 260 }
 261
 262 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
 263 {
 264         // Get the real structure for this producer
 265         producer_qimage this = producer->child;
 266
 267         // Fetch the producers properties
 268         mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
 269
 270         if ( this->filenames == NULL && mlt_properties_get( producer_properties, "resource" ) != NULL )
 271                 load_filenames( this, producer_properties );
 272
 273         // Generate a frame
 274         *frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
 275
 276         if ( *frame != NULL && this->count > 0 )
 277         {
 278                 // Obtain properties of frame and producer
 279                 mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
 280
 281                 // Set the producer on the frame properties
 282                 mlt_properties_set_data( properties, "producer_qimage", this, 0, NULL, NULL );
 283
 284                 // Update timecode on the frame we're creating
 285                 mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
 286
 287                 // Ensure that we have a way to obtain the position in the get_image
 288                 mlt_properties_set_position( properties, "qimage_position", mlt_producer_position( producer ) );
 289
 290                 // Refresh the image
 291                 refresh_qimage( this, *frame, 0, 0 );
 292
 293                 // Set producer-specific frame properties
 294                 mlt_properties_set_int( properties, "progressive", mlt_properties_get_int( producer_properties, "progressive" ) );
 295                 mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( producer_properties, "aspect_ratio" ) );
 296
 297                 // Set alpha call back
 298                 ( *frame )->get_alpha_mask = producer_get_alpha_mask;
 299
 300                 // Push the get_image method
 301                 mlt_frame_push_get_image( *frame, producer_get_image );
 302         }
 303
 304         // Calculate the next timecode
 305         mlt_producer_prepare_next( producer );
 306
 307         return 0;
 308 }
 309
 310 static void producer_close( mlt_producer parent )
 311 {
 312         producer_qimage this = parent->child;
 313         pthread_mutex_destroy( &this->mutex );
 314         parent->close = NULL;
 315         mlt_producer_close( parent );
 316         mlt_properties_close( this->filenames );
 317         free( this );
 318 }