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
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 if ( *format == mlt_image_yuv422 || *format == mlt_image_yuv420p )
97 // Clone the image and the alpha
98 uint8_t *image_copy = mlt_pool_alloc( image_size );
99 uint8_t *alpha_copy = mlt_pool_alloc( alpha_size );
101 memcpy( image_copy, *buffer, image_size );
103 // Copy or default the alpha
105 memcpy( alpha_copy, alpha, alpha_size );
107 memset( alpha_copy, 255, alpha_size );
109 // Now update properties so we free the copy after
110 mlt_properties_set_data( properties, "image", image_copy, image_size, mlt_pool_release, NULL );
111 mlt_properties_set_data( properties, "alpha", alpha_copy, alpha_size, mlt_pool_release, NULL );
113 // We're going to pass the copy on
114 *buffer = image_copy;
116 else if ( *format == mlt_image_rgb24a )
118 // Clone the image and the alpha
119 image_size = *width * ( *height + 1 ) * 4;
120 alpha_size = *width * ( *height + 1 );
121 uint8_t *image_copy = mlt_pool_alloc( image_size );
122 uint8_t *alpha_copy = mlt_pool_alloc( alpha_size );
124 mlt_convert_yuv422_to_rgb24a(*buffer, image_copy, (*width)*(*height));
126 // Now update properties so we free the copy after
127 mlt_properties_set_data( properties, "image", image_copy, image_size, mlt_pool_release, NULL );
128 mlt_properties_set_data( properties, "alpha", alpha_copy, alpha_size, mlt_pool_release, NULL );
130 // We're going to pass the copy on
131 *buffer = image_copy;
136 // TODO: Review all cases of invalid images
137 *buffer = mlt_pool_alloc( 50 * 50 * 2 );
138 mlt_properties_set_data( properties, "image", *buffer, image_size, mlt_pool_release, NULL );
146 static uint8_t *producer_get_alpha_mask( mlt_frame this )
148 // Obtain properties of frame
149 mlt_properties properties = MLT_FRAME_PROPERTIES( this );
151 // Return the alpha mask
152 return mlt_properties_get_data( properties, "alpha", NULL );
155 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
157 // Get the real structure for this producer
158 producer_qimage this = producer->child;
160 // Fetch the producers properties
161 mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
163 if ( this->filenames == NULL && mlt_properties_get( producer_properties, "resource" ) != NULL )
165 char *filename = mlt_properties_get( producer_properties, "resource" );
166 this->filenames = mlt_properties_new( );
169 if ( strstr( filename, "<svg" ) )
171 // Generate a temporary file for the svg
172 char fullname[ 1024 ] = "/tmp/mlt.XXXXXX";
173 int fd = mkstemp( fullname );
177 // Write the svg into the temp file
178 ssize_t remaining_bytes;
179 char *xml = filename;
181 // Strip leading crap
182 while ( xml[0] != '<' )
185 remaining_bytes = strlen( xml );
186 while ( remaining_bytes > 0 )
187 remaining_bytes -= write( fd, xml + strlen( xml ) - remaining_bytes, remaining_bytes );
190 mlt_properties_set( this->filenames, "0", fullname );
192 // Teehe - when the producer closes, delete the temp file and the space allo
193 mlt_properties_set_data( producer_properties, "__temporary_file__", fullname, 0, ( mlt_destructor )unlink, NULL );
197 else if ( strchr( filename, '%' ) != NULL )
199 // handle picture sequences
200 int i = mlt_properties_get_int( producer_properties, "begin" );
209 snprintf( full, 1023, filename, i ++ );
210 if ( stat( full, &buf ) == 0 )
212 sprintf( key, "%d", keyvalue ++ );
213 mlt_properties_set( this->filenames, "0", full );
222 else if ( strstr( filename, "/.all." ) != NULL )
224 char wildcard[ 1024 ];
225 char *dir_name = strdup( filename );
226 char *extension = strrchr( dir_name, '.' );
228 *( strstr( dir_name, "/.all." ) + 1 ) = '\0';
229 sprintf( wildcard, "*%s", extension );
231 mlt_properties_dir_list( this->filenames, dir_name, wildcard, 1 );
237 mlt_properties_set( this->filenames, "0", filename );
240 this->count = mlt_properties_count( this->filenames );
244 *frame = mlt_frame_init( );
246 if ( *frame != NULL && this->count > 0 )
248 // Obtain properties of frame and producer
249 mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
251 // Set the producer on the frame properties
252 mlt_properties_set_data( properties, "producer_qimage", this, 0, NULL, NULL );
254 // Update timecode on the frame we're creating
255 mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
257 // Ensure that we have a way to obtain the position in the get_image
258 mlt_properties_set_position( properties, "qimage_position", mlt_producer_position( producer ) );
261 refresh_qimage( *frame, 0, 0 );
263 // Set producer-specific frame properties
264 mlt_properties_set_int( properties, "progressive", mlt_properties_get_int( producer_properties, "progressive" ) );
265 mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( producer_properties, "aspect_ratio" ) );
267 // Set alpha call back
268 ( *frame )->get_alpha_mask = producer_get_alpha_mask;
270 // Push the get_image method
271 mlt_frame_push_get_image( *frame, producer_get_image );
274 // Calculate the next timecode
275 mlt_producer_prepare_next( producer );
280 static void producer_close( mlt_producer parent )
282 producer_qimage this = parent->child;
283 parent->close = NULL;
284 mlt_producer_close( parent );
285 mlt_properties_close( this->filenames );