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 "producer_qimage.h"
25 #include "qimage_wrapper.h"
31 #include <sys/types.h>
35 static int producer_get_frame( mlt_producer parent
, mlt_frame_ptr frame
, int index
);
36 static void producer_close( mlt_producer parent
);
38 mlt_producer
producer_qimage_init( char *filename
)
40 producer_qimage
this = calloc( sizeof( struct producer_qimage_s
), 1 );
41 if ( this != NULL
&& mlt_producer_init( &this->parent
, this ) == 0 )
43 mlt_producer producer
= &this->parent
;
45 // Get the properties interface
46 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( &this->parent
);
48 // Callback registration
49 producer
->get_frame
= producer_get_frame
;
50 producer
->close
= ( mlt_destructor
)producer_close
;
52 // Set the default properties
53 mlt_properties_set( properties
, "resource", filename
);
54 mlt_properties_set_int( properties
, "ttl", 25 );
55 mlt_properties_set_int( properties
, "aspect_ratio", 1 );
56 mlt_properties_set_int( properties
, "progressive", 1 );
64 static int producer_get_image( mlt_frame frame
, uint8_t **buffer
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
66 // Obtain properties of frame
67 mlt_properties properties
= MLT_FRAME_PROPERTIES( frame
);
69 // We need to know the size of the image to clone it
74 uint8_t *alpha
= NULL
;
76 *width
= mlt_properties_get_int( properties
, "rescale_width" );
77 *height
= mlt_properties_get_int( properties
, "rescale_height" );
80 refresh_qimage( frame
, *width
, *height
);
83 *buffer
= mlt_properties_get_data( properties
, "image", &image_size
);
84 alpha
= mlt_properties_get_data( properties
, "alpha", &alpha_size
);
86 // Get width and height (may have changed during the refresh)
87 *width
= mlt_properties_get_int( properties
, "width" );
88 *height
= mlt_properties_get_int( properties
, "height" );
90 // NB: Cloning is necessary with this producer (due to processing of images ahead of use)
91 // The fault is not in the design of mlt, but in the implementation of the qimage producer...
92 if ( *buffer
!= NULL
)
94 if ( *format
== mlt_image_yuv422
|| *format
== mlt_image_yuv420p
)
96 // Clone the image and the alpha
97 uint8_t *image_copy
= mlt_pool_alloc( image_size
);
98 uint8_t *alpha_copy
= mlt_pool_alloc( alpha_size
);
100 memcpy( image_copy
, *buffer
, image_size
);
102 // Copy or default the alpha
104 memcpy( alpha_copy
, alpha
, alpha_size
);
106 memset( alpha_copy
, 255, alpha_size
);
108 // Now update properties so we free the copy after
109 mlt_properties_set_data( properties
, "image", image_copy
, image_size
, mlt_pool_release
, NULL
);
110 mlt_properties_set_data( properties
, "alpha", alpha_copy
, alpha_size
, mlt_pool_release
, NULL
);
112 // We're going to pass the copy on
113 *buffer
= image_copy
;
115 else if ( *format
== mlt_image_rgb24a
)
117 // Clone the image and the alpha
118 image_size
= *width
* ( *height
+ 1 ) * 4;
119 alpha_size
= *width
* ( *height
+ 1 );
120 uint8_t *image_copy
= mlt_pool_alloc( image_size
);
121 uint8_t *alpha_copy
= mlt_pool_alloc( alpha_size
);
123 mlt_convert_yuv422_to_rgb24a(*buffer
, image_copy
, (*width
)*(*height
));
125 // Now update properties so we free the copy after
126 mlt_properties_set_data( properties
, "image", image_copy
, image_size
, mlt_pool_release
, NULL
);
127 mlt_properties_set_data( properties
, "alpha", alpha_copy
, alpha_size
, mlt_pool_release
, NULL
);
129 // We're going to pass the copy on
130 *buffer
= image_copy
;
135 // TODO: Review all cases of invalid images
136 *buffer
= mlt_pool_alloc( 50 * 50 * 2 );
137 mlt_properties_set_data( properties
, "image", *buffer
, image_size
, mlt_pool_release
, NULL
);
145 static uint8_t *producer_get_alpha_mask( mlt_frame
this )
147 // Obtain properties of frame
148 mlt_properties properties
= MLT_FRAME_PROPERTIES( this );
150 // Return the alpha mask
151 return mlt_properties_get_data( properties
, "alpha", NULL
);
154 static int producer_get_frame( mlt_producer producer
, mlt_frame_ptr frame
, int index
)
156 // Get the real structure for this producer
157 producer_qimage
this = producer
->child
;
159 // Fetch the producers properties
160 mlt_properties producer_properties
= MLT_PRODUCER_PROPERTIES( producer
);
162 if ( this->filenames
== NULL
&& mlt_properties_get( producer_properties
, "resource" ) != NULL
)
164 char *filename
= mlt_properties_get( producer_properties
, "resource" );
165 this->filenames
= mlt_properties_new( );
168 if ( strstr( filename
, "<svg" ) )
170 // Generate a temporary file for the svg
171 char fullname
[ 1024 ] = "/tmp/mlt.XXXXXX";
172 int fd
= mkstemp( fullname
);
176 // Write the svg into the temp file
177 ssize_t remaining_bytes
;
178 char *xml
= filename
;
180 // Strip leading crap
181 while ( xml
[0] != '<' )
184 remaining_bytes
= strlen( xml
);
185 while ( remaining_bytes
> 0 )
186 remaining_bytes
-= write( fd
, xml
+ strlen( xml
) - remaining_bytes
, remaining_bytes
);
189 mlt_properties_set( this->filenames
, "0", fullname
);
191 // Teehe - when the producer closes, delete the temp file and the space allo
192 mlt_properties_set_data( producer_properties
, "__temporary_file__", fullname
, 0, ( mlt_destructor
)unlink
, NULL
);
196 else if ( strchr( filename
, '%' ) != NULL
)
198 // handle picture sequences
199 int i
= mlt_properties_get_int( producer_properties
, "begin" );
208 snprintf( full
, 1023, filename
, i
++ );
209 if ( stat( full
, &buf
) == 0 )
211 sprintf( key
, "%d", keyvalue
++ );
212 mlt_properties_set( this->filenames
, "0", full
);
221 else if ( strstr( filename
, "/.all." ) != NULL
)
223 char wildcard
[ 1024 ];
224 char *dir_name
= strdup( filename
);
225 char *extension
= strrchr( dir_name
, '.' );
227 *( strstr( dir_name
, "/.all." ) + 1 ) = '\0';
228 sprintf( wildcard
, "*%s", extension
);
230 mlt_properties_dir_list( this->filenames
, dir_name
, wildcard
, 1 );
236 mlt_properties_set( this->filenames
, "0", filename
);
239 this->count
= mlt_properties_count( this->filenames
);
243 *frame
= mlt_frame_init( );
245 if ( *frame
!= NULL
&& this->count
> 0 )
247 // Obtain properties of frame and producer
248 mlt_properties properties
= MLT_FRAME_PROPERTIES( *frame
);
250 // Set the producer on the frame properties
251 mlt_properties_set_data( properties
, "producer_qimage", this, 0, NULL
, NULL
);
253 // Update timecode on the frame we're creating
254 mlt_frame_set_position( *frame
, mlt_producer_position( producer
) );
256 // Ensure that we have a way to obtain the position in the get_image
257 mlt_properties_set_position( properties
, "qimage_position", mlt_producer_position( producer
) );
260 refresh_qimage( *frame
, 0, 0 );
262 // Set producer-specific frame properties
263 mlt_properties_set_int( properties
, "progressive", mlt_properties_get_int( producer_properties
, "progressive" ) );
264 mlt_properties_set_double( properties
, "aspect_ratio", mlt_properties_get_double( producer_properties
, "aspect_ratio" ) );
266 // Set alpha call back
267 ( *frame
)->get_alpha_mask
= producer_get_alpha_mask
;
269 // Push the get_image method
270 mlt_frame_push_get_image( *frame
, producer_get_image
);
273 // Calculate the next timecode
274 mlt_producer_prepare_next( producer
);
279 static void producer_close( mlt_producer parent
)
281 producer_qimage
this = parent
->child
;
282 parent
->close
= NULL
;
283 mlt_producer_close( parent
);
284 mlt_properties_close( this->filenames
);