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>
6 * NB: This module is designed to be functionally equivalent to the
7 * gtk2 image loading module so it can be used as replacement.
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.
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.
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.
24 #include <framework/mlt_producer.h>
25 #include <framework/mlt_cache.h>
26 #include "qimage_wrapper.h"
32 #include <sys/types.h>
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 );
40 mlt_producer producer_qimage_init( mlt_profile profile, mlt_service_type type, const char *id, char *filename )
42 producer_qimage this = calloc( sizeof( struct producer_qimage_s ), 1 );
43 if ( this != NULL && mlt_producer_init( &this->parent, this ) == 0 )
45 mlt_producer producer = &this->parent;
47 // Get the properties interface
48 mlt_properties properties = MLT_PRODUCER_PROPERTIES( &this->parent );
50 // Callback registration
54 producer->get_frame = producer_get_frame;
55 producer->close = ( mlt_destructor )producer_close;
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 );
63 // Validate the resource
65 load_filenames( this, properties );
68 mlt_frame frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
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 );
80 if ( this->current_width == 0 )
82 producer_close( producer );
91 static void load_filenames( producer_qimage this, mlt_properties producer_properties )
93 char *filename = mlt_properties_get( producer_properties, "resource" );
94 this->filenames = mlt_properties_new( );
97 if ( strstr( filename, "<svg" ) )
99 // Generate a temporary file for the svg
100 char fullname[ 1024 ] = "/tmp/mlt.XXXXXX";
101 int fd = mkstemp( fullname );
105 // Write the svg into the temp file
106 ssize_t remaining_bytes;
107 char *xml = filename;
109 // Strip leading crap
110 while ( xml[0] != '<' )
113 remaining_bytes = strlen( xml );
114 while ( remaining_bytes > 0 )
115 remaining_bytes -= write( fd, xml + strlen( xml ) - remaining_bytes, remaining_bytes );
118 mlt_properties_set( this->filenames, "0", fullname );
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 );
125 else if ( strchr( filename, '%' ) != NULL )
127 // handle picture sequences
128 int i = mlt_properties_get_int( producer_properties, "begin" );
137 snprintf( full, 1023, filename, i ++ );
138 if ( stat( full, &buf ) == 0 )
140 sprintf( key, "%d", keyvalue ++ );
141 mlt_properties_set( this->filenames, key, full );
149 if ( mlt_properties_count( this->filenames ) > 0 )
150 mlt_properties_set_int( producer_properties, "ttl", 1 );
152 else if ( strstr( filename, "/.all." ) != NULL )
154 char wildcard[ 1024 ];
155 char *dir_name = strdup( filename );
156 char *extension = strrchr( dir_name, '.' );
158 *( strstr( dir_name, "/.all." ) + 1 ) = '\0';
159 sprintf( wildcard, "*%s", extension );
161 mlt_properties_dir_list( this->filenames, dir_name, wildcard, 1 );
167 mlt_properties_set( this->filenames, "0", filename );
170 this->count = mlt_properties_count( this->filenames );
173 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
177 // Obtain properties of frame
178 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
180 // Obtain the producer for this frame
181 producer_qimage this = mlt_properties_get_data( properties, "producer_qimage", NULL );
183 *width = mlt_properties_get_int( properties, "rescale_width" );
184 *height = mlt_properties_get_int( properties, "rescale_height" );
187 refresh_qimage( this, frame, *width, *height );
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" );
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 )
197 // Clone the image and the alpha
198 int image_size = this->current_width * ( this->current_height + 1 ) * ( this->has_alpha ? 4 :3 );
199 uint8_t *image_copy = mlt_pool_alloc( image_size );
200 memcpy( image_copy, this->current_image, image_size );
201 // Now update properties so we free the copy after
202 mlt_properties_set_data( properties, "image", image_copy, image_size, mlt_pool_release, NULL );
203 // We're going to pass the copy on
204 *buffer = image_copy;
205 *format = this->has_alpha ? mlt_image_rgb24a : mlt_image_rgb24;
206 mlt_log_debug( MLT_PRODUCER_SERVICE( &this->parent ), "%dx%d (%s)\n",
207 this->current_width, this->current_height, mlt_image_format_name( *format ) );
214 // Release references and locks
215 pthread_mutex_unlock( &this->mutex );
216 mlt_cache_item_close( this->image_cache );
221 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
223 // Get the real structure for this producer
224 producer_qimage this = producer->child;
226 // Fetch the producers properties
227 mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
229 if ( this->filenames == NULL && mlt_properties_get( producer_properties, "resource" ) != NULL )
230 load_filenames( this, producer_properties );
233 *frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
235 if ( *frame != NULL && this->count > 0 )
237 // Obtain properties of frame and producer
238 mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
240 // Set the producer on the frame properties
241 mlt_properties_set_data( properties, "producer_qimage", this, 0, NULL, NULL );
243 // Update timecode on the frame we're creating
244 mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
246 // Ensure that we have a way to obtain the position in the get_image
247 mlt_properties_set_position( properties, "qimage_position", mlt_producer_position( producer ) );
250 refresh_qimage( this, *frame, 0, 0 );
252 // Set producer-specific frame properties
253 mlt_properties_set_int( properties, "progressive", mlt_properties_get_int( producer_properties, "progressive" ) );
254 mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( producer_properties, "aspect_ratio" ) );
256 // Push the get_image method
257 mlt_frame_push_get_image( *frame, producer_get_image );
260 // Calculate the next timecode
261 mlt_producer_prepare_next( producer );
266 static void producer_close( mlt_producer parent )
268 producer_qimage this = parent->child;
269 pthread_mutex_destroy( &this->mutex );
270 parent->close = NULL;
271 mlt_service_cache_purge( MLT_PRODUCER_SERVICE(parent) );
272 mlt_producer_close( parent );
273 mlt_properties_close( this->filenames );