2 * producer_image.c -- a QT/QImage based producer for MLT
3 * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
4 * Author: Dan Dennedy <dan@dennedy.org>
5 * Charles Yates <charles.yates@gmail.com>
7 * NB: This module is designed to be functionally equivalent to the
8 * gtk2 image loading module so it can be used as replacement.
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software Foundation,
22 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
25 #include "producer_qimage.h"
26 #include "qimage_wrapper.h"
32 #include <sys/types.h>
36 static int producer_get_frame( mlt_producer parent
, mlt_frame_ptr frame
, int index
);
37 static void producer_close( mlt_producer parent
);
39 mlt_producer
producer_qimage_init( char *filename
)
41 producer_qimage
this = calloc( sizeof( struct producer_qimage_s
), 1 );
42 if ( this != NULL
&& mlt_producer_init( &this->parent
, this ) == 0 )
44 mlt_producer producer
= &this->parent
;
46 // Get the properties interface
47 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( &this->parent
);
49 // Callback registration
50 producer
->get_frame
= producer_get_frame
;
51 producer
->close
= ( mlt_destructor
)producer_close
;
53 // Set the default properties
54 mlt_properties_set( properties
, "resource", filename
);
55 mlt_properties_set_int( properties
, "ttl", 25 );
56 mlt_properties_set_int( properties
, "aspect_ratio", 1 );
57 mlt_properties_set_int( properties
, "progressive", 1 );
65 static int producer_get_image( mlt_frame frame
, uint8_t **buffer
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
67 // Obtain properties of frame
68 mlt_properties properties
= MLT_FRAME_PROPERTIES( frame
);
70 // We need to know the size of the image to clone it
75 uint8_t *alpha
= NULL
;
77 *width
= mlt_properties_get_int( properties
, "rescale_width" );
78 *height
= mlt_properties_get_int( properties
, "rescale_height" );
81 refresh_qimage( frame
, *width
, *height
);
84 *buffer
= mlt_properties_get_data( properties
, "image", &image_size
);
85 alpha
= mlt_properties_get_data( properties
, "alpha", &alpha_size
);
87 // Get width and height (may have changed during the refresh)
88 *width
= mlt_properties_get_int( properties
, "width" );
89 *height
= mlt_properties_get_int( properties
, "height" );
91 // NB: Cloning is necessary with this producer (due to processing of images ahead of use)
92 // The fault is not in the design of mlt, but in the implementation of the qimage producer...
93 if ( *buffer
!= NULL
)
95 // Clone the image and the alpha
96 uint8_t *image_copy
= mlt_pool_alloc( image_size
);
97 uint8_t *alpha_copy
= mlt_pool_alloc( alpha_size
);
99 memcpy( image_copy
, *buffer
, image_size
);
101 // Copy or default the alpha
103 memcpy( alpha_copy
, alpha
, alpha_size
);
105 memset( alpha_copy
, 255, alpha_size
);
107 // Now update properties so we free the copy after
108 mlt_properties_set_data( properties
, "image", image_copy
, image_size
, mlt_pool_release
, NULL
);
109 mlt_properties_set_data( properties
, "alpha", alpha_copy
, alpha_size
, mlt_pool_release
, NULL
);
111 // We're going to pass the copy on
112 *buffer
= image_copy
;
116 // TODO: Review all cases of invalid images
117 *buffer
= mlt_pool_alloc( 50 * 50 * 2 );
118 mlt_properties_set_data( properties
, "image", *buffer
, image_size
, mlt_pool_release
, NULL
);
126 static uint8_t *producer_get_alpha_mask( mlt_frame
this )
128 // Obtain properties of frame
129 mlt_properties properties
= MLT_FRAME_PROPERTIES( this );
131 // Return the alpha mask
132 return mlt_properties_get_data( properties
, "alpha", NULL
);
135 static int producer_get_frame( mlt_producer producer
, mlt_frame_ptr frame
, int index
)
137 // Get the real structure for this producer
138 producer_qimage
this = producer
->child
;
140 // Fetch the producers properties
141 mlt_properties producer_properties
= MLT_PRODUCER_PROPERTIES( producer
);
143 if ( this->filenames
== NULL
&& mlt_properties_get( producer_properties
, "resource" ) != NULL
)
145 char *filename
= mlt_properties_get( producer_properties
, "resource" );
146 this->filenames
= mlt_properties_new( );
149 if ( strstr( filename
, "<svg" ) )
151 // Generate a temporary file for the svg
152 char fullname
[ 1024 ] = "/tmp/mlt.XXXXXX";
153 int fd
= mkstemp( fullname
);
157 // Write the svg into the temp file
158 ssize_t remaining_bytes
;
159 char *xml
= filename
;
161 // Strip leading crap
162 while ( xml
[0] != '<' )
165 remaining_bytes
= strlen( xml
);
166 while ( remaining_bytes
> 0 )
167 remaining_bytes
-= write( fd
, xml
+ strlen( xml
) - remaining_bytes
, remaining_bytes
);
170 mlt_properties_set( this->filenames
, "0", fullname
);
172 // Teehe - when the producer closes, delete the temp file and the space allo
173 mlt_properties_set_data( producer_properties
, "__temporary_file__", fullname
, 0, ( mlt_destructor
)unlink
, NULL
);
177 else if ( strchr( filename
, '%' ) != NULL
)
179 // handle picture sequences
180 int i
= mlt_properties_get_int( producer_properties
, "begin" );
189 snprintf( full
, 1023, filename
, i
++ );
190 if ( stat( full
, &buf
) == 0 )
192 sprintf( key
, "%d", keyvalue
++ );
193 mlt_properties_set( this->filenames
, "0", full
);
202 else if ( strstr( filename
, "/.all." ) != NULL
)
204 char wildcard
[ 1024 ];
205 char *dir_name
= strdup( filename
);
206 char *extension
= strrchr( dir_name
, '.' );
208 *( strstr( dir_name
, "/.all." ) + 1 ) = '\0';
209 sprintf( wildcard
, "*%s", extension
);
211 mlt_properties_dir_list( this->filenames
, dir_name
, wildcard
, 1 );
217 mlt_properties_set( this->filenames
, "0", filename
);
220 this->count
= mlt_properties_count( this->filenames
);
224 *frame
= mlt_frame_init( );
226 if ( *frame
!= NULL
&& this->count
> 0 )
228 // Obtain properties of frame and producer
229 mlt_properties properties
= MLT_FRAME_PROPERTIES( *frame
);
231 // Set the producer on the frame properties
232 mlt_properties_set_data( properties
, "producer_qimage", this, 0, NULL
, NULL
);
234 // Update timecode on the frame we're creating
235 mlt_frame_set_position( *frame
, mlt_producer_position( producer
) );
237 // Ensure that we have a way to obtain the position in the get_image
238 mlt_properties_set_position( properties
, "qimage_position", mlt_producer_position( producer
) );
241 refresh_qimage( *frame
, 0, 0 );
243 // Set producer-specific frame properties
244 mlt_properties_set_int( properties
, "progressive", mlt_properties_get_int( producer_properties
, "progressive" ) );
245 mlt_properties_set_double( properties
, "aspect_ratio", mlt_properties_get_double( producer_properties
, "aspect_ratio" ) );
247 // Set alpha call back
248 ( *frame
)->get_alpha_mask
= producer_get_alpha_mask
;
250 // Push the get_image method
251 mlt_frame_push_get_image( *frame
, producer_get_image
);
254 // Calculate the next timecode
255 mlt_producer_prepare_next( producer
);
260 static void producer_close( mlt_producer parent
)
262 producer_qimage
this = parent
->child
;
263 parent
->close
= NULL
;
264 mlt_producer_close( parent
);
265 mlt_properties_close( this->filenames
);