git.sesse.net Git - mlt/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                                 mlt_properties_set_data( frame_properties, "producer_qimage", this, 0, NULL, NULL );
  73                                 mlt_frame_set_position( frame, mlt_producer_position( producer ) );
  74                                 mlt_properties_set_position( frame_properties, "qimage_position", mlt_producer_position( producer ) );
  75                                 refresh_qimage( this, frame, 0, 0 );
  76                                 mlt_frame_close( frame );
  77                         }
  78                 }
  79                 if ( this->current_width == 0 )
  80                 {
  81                         producer_close( producer );
  82                         producer = NULL;
  83                 }
  84                 if ( producer )
  85                         pthread_mutex_init( &this->mutex, NULL );
  86                 return producer;
  87         }
  88         free( this );
  89         return NULL;
  90 }
  91
  92 static void load_filenames( producer_qimage this, mlt_properties producer_properties )
  93 {
  94         char *filename = mlt_properties_get( producer_properties, "resource" );
  95         this->filenames = mlt_properties_new( );
  96
  97         // Read xml string
  98         if ( strstr( filename, "<svg" ) )
  99         {
 100                 make_tempfile( this, filename );
 101         }
 102         // Obtain filenames
 103         else if ( strchr( filename, '%' ) != NULL )
 104         {
 105                 // handle picture sequences
 106                 int i = mlt_properties_get_int( producer_properties, "begin" );
 107                 int gap = 0;
 108                 char full[1024];
 109                 int keyvalue = 0;
 110                 char key[ 50 ];
 111
 112                 while ( gap < 100 )
 113                 {
 114                         struct stat buf;
 115                         snprintf( full, 1023, filename, i ++ );
 116                         if ( stat( full, &buf ) == 0 )
 117                         {
 118                                 sprintf( key, "%d", keyvalue ++ );
 119                                 mlt_properties_set( this->filenames, key, full );
 120                                 gap = 0;
 121                         }
 122                         else
 123                         {
 124                                 gap ++;
 125                         }
 126                 }
 127                 if ( mlt_properties_count( this->filenames ) > 0 )
 128                         mlt_properties_set_int( producer_properties, "ttl", 1 );
 129         }
 130         else if ( strstr( filename, "/.all." ) != NULL )
 131         {
 132                 char wildcard[ 1024 ];
 133                 char *dir_name = strdup( filename );
 134                 char *extension = strrchr( dir_name, '.' );
 135
 136                 *( strstr( dir_name, "/.all." ) + 1 ) = '\0';
 137                 sprintf( wildcard, "*%s", extension );
 138
 139                 mlt_properties_dir_list( this->filenames, dir_name, wildcard, 1 );
 140
 141                 free( dir_name );
 142         }
 143         else
 144         {
 145                 mlt_properties_set( this->filenames, "0", filename );
 146         }
 147
 148         this->count = mlt_properties_count( this->filenames );
 149 }
 150
 151 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
 152 {
 153         int error = 0;
 154
 155         // Obtain properties of frame
 156         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 157
 158         // Obtain the producer for this frame
 159         producer_qimage this = mlt_properties_get_data( properties, "producer_qimage", NULL );
 160
 161         *width = mlt_properties_get_int( properties, "rescale_width" );
 162         *height = mlt_properties_get_int( properties, "rescale_height" );
 163
 164         mlt_service_lock( MLT_PRODUCER_SERVICE( &this->parent ) );
 165
 166         // Refresh the image
 167         refresh_qimage( this, frame, *width, *height );
 168
 169         // Get width and height (may have changed during the refresh)
 170         *width = mlt_properties_get_int( properties, "width" );
 171         *height = mlt_properties_get_int( properties, "height" );
 172
 173         // NB: Cloning is necessary with this producer (due to processing of images ahead of use)
 174         // The fault is not in the design of mlt, but in the implementation of the qimage producer...
 175         if ( this->current_image )
 176         {
 177                 // Clone the image and the alpha
 178                 int image_size = this->current_width * ( this->current_height + 1 ) * ( this->has_alpha ? 4 :3 );
 179                 uint8_t *image_copy = mlt_pool_alloc( image_size );
 180                 memcpy( image_copy, this->current_image, image_size );
 181                 // Now update properties so we free the copy after
 182                 mlt_frame_set_image( frame, image_copy, image_size, mlt_pool_release );
 183                 // We're going to pass the copy on
 184                 *buffer = image_copy;
 185                 *format = this->has_alpha ? mlt_image_rgb24a : mlt_image_rgb24;
 186                 mlt_log_debug( MLT_PRODUCER_SERVICE( &this->parent ), "%dx%d (%s)\n",
 187                         this->current_width, this->current_height, mlt_image_format_name( *format ) );
 188         }
 189         else
 190         {
 191                 error = 1;
 192         }
 193
 194         // Release references and locks
 195         pthread_mutex_unlock( &this->mutex );
 196         mlt_cache_item_close( this->image_cache );
 197         mlt_service_unlock( MLT_PRODUCER_SERVICE( &this->parent ) );
 198
 199         return error;
 200 }
 201
 202 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
 203 {
 204         // Get the real structure for this producer
 205         producer_qimage this = producer->child;
 206
 207         // Fetch the producers properties
 208         mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
 209
 210         if ( this->filenames == NULL && mlt_properties_get( producer_properties, "resource" ) != NULL )
 211                 load_filenames( this, producer_properties );
 212
 213         // Generate a frame
 214         *frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
 215
 216         if ( *frame != NULL && this->count > 0 )
 217         {
 218                 // Obtain properties of frame and producer
 219                 mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
 220
 221                 // Set the producer on the frame properties
 222                 mlt_properties_set_data( properties, "producer_qimage", this, 0, NULL, NULL );
 223
 224                 // Update timecode on the frame we're creating
 225                 mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
 226
 227                 // Ensure that we have a way to obtain the position in the get_image
 228                 mlt_properties_set_position( properties, "qimage_position", mlt_producer_position( producer ) );
 229
 230                 // Refresh the image
 231                 refresh_qimage( this, *frame, 0, 0 );
 232
 233                 // Set producer-specific frame properties
 234                 mlt_properties_set_int( properties, "progressive", mlt_properties_get_int( producer_properties, "progressive" ) );
 235                 double force_ratio = mlt_properties_get_double( producer_properties, "force_aspect_ratio" );
 236                 if ( force_ratio > 0.0 )
 237                         mlt_properties_set_double( properties, "aspect_ratio", force_ratio );
 238                 else
 239                         mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( producer_properties, "aspect_ratio" ) );
 240
 241                 // Push the get_image method
 242                 mlt_frame_push_get_image( *frame, producer_get_image );
 243         }
 244
 245         // Calculate the next timecode
 246         mlt_producer_prepare_next( producer );
 247
 248         return 0;
 249 }
 250
 251 static void producer_close( mlt_producer parent )
 252 {
 253         producer_qimage this = parent->child;
 254         pthread_mutex_destroy( &this->mutex );
 255         parent->close = NULL;
 256         mlt_service_cache_purge( MLT_PRODUCER_SERVICE(parent) );
 257         mlt_producer_close( parent );
 258         mlt_properties_close( this->filenames );
 259         free( this );
 260 }