2 * filter_watermark.c -- watermark filter
3 * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
4 * Author: Charles Yates <charles.yates@pandora.be>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #include "filter_watermark.h"
23 #include <framework/mlt_factory.h>
24 #include <framework/mlt_frame.h>
25 #include <framework/mlt_producer.h>
26 #include <framework/mlt_transition.h>
35 static int filter_get_image( mlt_frame frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
37 // Error we will return
40 // Get the watermark filter object
41 mlt_filter this = mlt_frame_pop_service( frame );
43 // Get the properties of the filter
44 mlt_properties properties = MLT_FILTER_PROPERTIES( this );
46 // Get the producer from the filter
47 mlt_producer producer = mlt_properties_get_data( properties, "producer", NULL );
49 // Get the composite from the filter
50 mlt_transition composite = mlt_properties_get_data( properties, "composite", NULL );
52 // Get the resource to use
53 char *resource = mlt_properties_get( properties, "resource" );
55 // Get the old resource
56 char *old_resource = mlt_properties_get( properties, "_old_resource" );
58 // Create a composite if we don't have one
59 if ( composite == NULL )
61 // Create composite via the factory
62 composite = mlt_factory_transition( "composite", NULL );
64 // Register the composite for reuse/destruction
65 if ( composite != NULL )
66 mlt_properties_set_data( properties, "composite", composite, 0, ( mlt_destructor )mlt_transition_close, NULL );
70 if ( composite != NULL )
73 mlt_properties composite_properties = MLT_TRANSITION_PROPERTIES( composite );
75 // Pass all the composite. properties on the filter down
76 mlt_properties_pass( composite_properties, properties, "composite." );
78 if ( mlt_properties_get( properties, "composite.out" ) == NULL )
79 mlt_properties_set_int( composite_properties, "out", mlt_properties_get_int( properties, "_out" ) );
82 mlt_properties_set_int( composite_properties, "refresh", 1 );
85 // Create a producer if don't have one
86 if ( producer == NULL || ( old_resource != NULL && strcmp( resource, old_resource ) ) )
88 // Get the factory producer service
89 char *factory = mlt_properties_get( properties, "factory" );
91 // Create the producer
92 producer = mlt_factory_producer( factory, resource );
95 if ( producer != NULL )
97 // Register the producer for reuse/destruction
98 mlt_properties_set_data( properties, "producer", producer, 0, ( mlt_destructor )mlt_producer_close, NULL );
100 // Ensure that we loop
101 mlt_properties_set( MLT_PRODUCER_PROPERTIES( producer ), "eof", "loop" );
103 // Set the old resource
104 mlt_properties_set( properties, "_old_resource", resource );
108 if ( producer != NULL )
110 // Get the producer properties
111 mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
113 // Now pass all producer. properties on the filter down
114 mlt_properties_pass( producer_properties, properties, "producer." );
117 // Only continue if we have both producer and composite
118 if ( composite != NULL && producer != NULL )
120 // Get the service of the producer
121 mlt_service service = MLT_PRODUCER_SERVICE( producer );
123 // We will get the 'b frame' from the producer
124 mlt_frame b_frame = NULL;
126 // Get the unique id of the filter (used to reacquire the producer position)
127 char *name = mlt_properties_get( properties, "_unique_id" );
129 // Get the original producer position
130 mlt_position position = mlt_properties_get_position( MLT_FRAME_PROPERTIES( frame ), name );
132 // Make sure the producer is in the correct position
133 mlt_producer_seek( producer, position );
135 // Resetting position to appease the composite transition
136 mlt_frame_set_position( frame, position );
138 // Get the b frame and process with composite if successful
139 if ( mlt_service_get_frame( service, &b_frame, 0 ) == 0 )
141 // Get the a and b frame properties
142 mlt_properties a_props = MLT_FRAME_PROPERTIES( frame );
143 mlt_properties b_props = MLT_FRAME_PROPERTIES( b_frame );
145 // Set the b frame to be in the same position and have same consumer requirements
146 mlt_frame_set_position( b_frame, position );
147 mlt_properties_set_double( b_props, "consumer_aspect_ratio", mlt_properties_get_double( a_props, "consumer_aspect_ratio" ) );
148 mlt_properties_set_int( b_props, "consumer_deinterlace", mlt_properties_get_double( a_props, "consumer_deinterlace" ) );
149 mlt_properties_set_int( b_props, "output_ratio", mlt_properties_get_double( a_props, "output_ratio" ) );
151 // Check for the special case - no aspect ratio means no problem :-)
152 if ( mlt_frame_get_aspect_ratio( b_frame ) == 0 )
153 mlt_properties_set_double( b_props, "aspect_ratio", mlt_properties_get_double( a_props, "consumer_aspect_ratio" ) );
154 if ( mlt_frame_get_aspect_ratio( frame ) == 0 )
155 mlt_properties_set_double( a_props, "aspect_ratio", mlt_properties_get_double( a_props, "consumer_aspect_ratio" ) );
157 mlt_properties_set_int( b_props, "normalised_width", mlt_properties_get_int( a_props, "normalised_width" ) );
158 mlt_properties_set_int( b_props, "normalised_height", mlt_properties_get_int( a_props, "normalised_height" ) );
160 if ( mlt_properties_get_int( properties, "distort" ) )
162 mlt_properties_set_int( MLT_TRANSITION_PROPERTIES( composite ), "distort", 1 );
163 mlt_properties_set_int( a_props, "distort", 1 );
164 mlt_properties_set_int( b_props, "distort", 1 );
167 if ( mlt_properties_get_int( properties, "reverse" ) == 0 )
169 // Apply all filters that are attached to this filter to the b frame
170 mlt_service_apply_filters( MLT_FILTER_SERVICE( this ), b_frame, 0 );
173 mlt_transition_process( composite, frame, b_frame );
176 error = mlt_frame_get_image( frame, image, format, width, height, 1 );
182 uint8_t *alpha = NULL;
183 char *rescale = mlt_properties_get( a_props, "rescale.interp" );
184 if ( rescale == NULL || !strcmp( rescale, "none" ) )
186 mlt_transition_process( composite, b_frame, frame );
187 mlt_properties_set_int( a_props, "consumer_deinterlace", 1 );
188 mlt_properties_set_int( b_props, "consumer_deinterlace", 1 );
189 mlt_properties_set( a_props, "rescale.interp", rescale );
190 mlt_properties_set( b_props, "rescale.interp", rescale );
191 mlt_service_apply_filters( MLT_FILTER_SERVICE( this ), b_frame, 0 );
192 error = mlt_frame_get_image( b_frame, image, format, width, height, 1 );
193 alpha = mlt_frame_get_alpha_mask( b_frame );
194 mlt_properties_set_data( a_props, "image", *image, *width * *height * 2, NULL, NULL );
195 mlt_properties_set_data( a_props, "alpha", alpha, *width * *height, NULL, NULL );
196 mlt_properties_set_int( a_props, "width", *width );
197 mlt_properties_set_int( a_props, "height", *height );
198 mlt_properties_set_int( a_props, "progressive", 1 );
199 mlt_properties_inc_ref( b_props );
200 strcpy( temp, "_b_frame" );
201 while( mlt_properties_get_data( a_props, temp, NULL ) != NULL )
202 sprintf( temp, "_b_frame%d", count ++ );
203 mlt_properties_set_data( a_props, temp, b_frame, 0, ( mlt_destructor )mlt_frame_close, NULL );
208 mlt_frame_close( b_frame );
212 // Get the image from the frame without running fx
213 error = mlt_frame_get_image( frame, image, format, width, height, 1 );
219 /** Filter processing.
222 static mlt_frame filter_process( mlt_filter this, mlt_frame frame )
224 // Get the properties of the frame
225 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
227 // Get a unique name to store the frame position
228 char *name = mlt_properties_get( MLT_FILTER_PROPERTIES( this ), "_unique_id" );
230 // Assign the frame out point to the filter (just in case we need it later)
231 mlt_properties_set_int( MLT_FILTER_PROPERTIES( this ), "_out", mlt_properties_get_int( properties, "out" ) );
233 // Assign the current position to the name
234 mlt_properties_set_position( properties, name, mlt_frame_get_position( frame ) - mlt_filter_get_in( this ) );
236 // Push the filter on to the stack
237 mlt_frame_push_service( frame, this );
239 // Push the get_image on to the stack
240 mlt_frame_push_get_image( frame, filter_get_image );
245 /** Constructor for the filter.
248 mlt_filter filter_watermark_init( void *arg )
250 mlt_filter this = mlt_filter_new( );
253 mlt_properties properties = MLT_FILTER_PROPERTIES( this );
254 this->process = filter_process;
255 mlt_properties_set( properties, "factory", "fezzik" );
257 mlt_properties_set( properties, "resource", arg );
258 // Ensure that attached filters are handled privately
259 mlt_properties_set_int( properties, "_filter_private", 1 );