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 "qimage_wrapper.h"
31 #include <sys/types.h>
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
);
39 mlt_producer
producer_qimage_init( mlt_profile profile
, mlt_service_type type
, const char *id
, 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
53 producer
->get_frame
= producer_get_frame
;
54 producer
->close
= ( mlt_destructor
)producer_close
;
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 );
62 // Validate the resource
64 load_filenames( this, properties
);
67 mlt_frame frame
= mlt_frame_init( MLT_PRODUCER_SERVICE( producer
) );
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
);
78 if ( this->current_width
== 0 )
80 producer_close( producer
);
89 static void load_filenames( producer_qimage
this, mlt_properties producer_properties
)
91 char *filename
= mlt_properties_get( producer_properties
, "resource" );
92 this->filenames
= mlt_properties_new( );
95 if ( strstr( filename
, "<svg" ) )
97 // Generate a temporary file for the svg
98 char fullname
[ 1024 ] = "/tmp/mlt.XXXXXX";
99 int fd
= mkstemp( fullname
);
103 // Write the svg into the temp file
104 ssize_t remaining_bytes
;
105 char *xml
= filename
;
107 // Strip leading crap
108 while ( xml
[0] != '<' )
111 remaining_bytes
= strlen( xml
);
112 while ( remaining_bytes
> 0 )
113 remaining_bytes
-= write( fd
, xml
+ strlen( xml
) - remaining_bytes
, remaining_bytes
);
116 mlt_properties_set( this->filenames
, "0", fullname
);
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
);
123 else if ( strchr( filename
, '%' ) != NULL
)
125 // handle picture sequences
126 int i
= mlt_properties_get_int( producer_properties
, "begin" );
135 snprintf( full
, 1023, filename
, i
++ );
136 if ( stat( full
, &buf
) == 0 )
138 sprintf( key
, "%d", keyvalue
++ );
139 mlt_properties_set( this->filenames
, key
, full
);
148 else if ( strstr( filename
, "/.all." ) != NULL
)
150 char wildcard
[ 1024 ];
151 char *dir_name
= strdup( filename
);
152 char *extension
= strrchr( dir_name
, '.' );
154 *( strstr( dir_name
, "/.all." ) + 1 ) = '\0';
155 sprintf( wildcard
, "*%s", extension
);
157 mlt_properties_dir_list( this->filenames
, dir_name
, wildcard
, 1 );
163 mlt_properties_set( this->filenames
, "0", filename
);
166 this->count
= mlt_properties_count( this->filenames
);
169 static int producer_get_image( mlt_frame frame
, uint8_t **buffer
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
171 // Obtain properties of frame
172 mlt_properties properties
= MLT_FRAME_PROPERTIES( frame
);
174 // We need to know the size of the image to clone it
179 uint8_t *alpha
= NULL
;
181 *width
= mlt_properties_get_int( properties
, "rescale_width" );
182 *height
= mlt_properties_get_int( properties
, "rescale_height" );
185 refresh_qimage( frame
, *width
, *height
);
188 *buffer
= mlt_properties_get_data( properties
, "image", &image_size
);
189 alpha
= mlt_properties_get_data( properties
, "alpha", &alpha_size
);
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" );
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
)
199 if ( *format
== mlt_image_yuv422
|| *format
== mlt_image_yuv420p
)
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
);
205 memcpy( image_copy
, *buffer
, image_size
);
207 // Copy or default the alpha
209 memcpy( alpha_copy
, alpha
, alpha_size
);
211 memset( alpha_copy
, 255, alpha_size
);
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
);
217 // We're going to pass the copy on
218 *buffer
= image_copy
;
220 else if ( *format
== mlt_image_rgb24a
)
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
);
228 mlt_convert_yuv422_to_rgb24a(*buffer
, image_copy
, (*width
)*(*height
));
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
);
234 // We're going to pass the copy on
235 *buffer
= image_copy
;
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
);
250 static uint8_t *producer_get_alpha_mask( mlt_frame
this )
252 // Obtain properties of frame
253 mlt_properties properties
= MLT_FRAME_PROPERTIES( this );
255 // Return the alpha mask
256 return mlt_properties_get_data( properties
, "alpha", NULL
);
259 static int producer_get_frame( mlt_producer producer
, mlt_frame_ptr frame
, int index
)
261 // Get the real structure for this producer
262 producer_qimage
this = producer
->child
;
264 // Fetch the producers properties
265 mlt_properties producer_properties
= MLT_PRODUCER_PROPERTIES( producer
);
267 if ( this->filenames
== NULL
&& mlt_properties_get( producer_properties
, "resource" ) != NULL
)
268 load_filenames( this, producer_properties
);
271 *frame
= mlt_frame_init( MLT_PRODUCER_SERVICE( producer
) );
273 if ( *frame
!= NULL
&& this->count
> 0 )
275 // Obtain properties of frame and producer
276 mlt_properties properties
= MLT_FRAME_PROPERTIES( *frame
);
278 // Set the producer on the frame properties
279 mlt_properties_set_data( properties
, "producer_qimage", this, 0, NULL
, NULL
);
281 // Update timecode on the frame we're creating
282 mlt_frame_set_position( *frame
, mlt_producer_position( producer
) );
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
) );
288 refresh_qimage( *frame
, 0, 0 );
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" ) );
294 // Set alpha call back
295 ( *frame
)->get_alpha_mask
= producer_get_alpha_mask
;
297 // Push the get_image method
298 mlt_frame_push_get_image( *frame
, producer_get_image
);
301 // Calculate the next timecode
302 mlt_producer_prepare_next( producer
);
307 static void producer_close( mlt_producer parent
)
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
);