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 <framework/mlt_filter.h>
22 #include <framework/mlt_factory.h>
23 #include <framework/mlt_frame.h>
24 #include <framework/mlt_producer.h>
25 #include <framework/mlt_transition.h>
34 static int filter_get_image( mlt_frame frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
36 // Error we will return
39 // Get the watermark filter object
40 mlt_filter this = mlt_frame_pop_service( frame );
42 // Get the properties of the filter
43 mlt_properties properties = MLT_FILTER_PROPERTIES( this );
45 // Get the producer from the filter
46 mlt_producer producer = mlt_properties_get_data( properties, "producer", NULL );
48 // Get the composite from the filter
49 mlt_transition composite = mlt_properties_get_data( properties, "composite", NULL );
51 // Get the resource to use
52 char *resource = mlt_properties_get( properties, "resource" );
54 // Get the old resource
55 char *old_resource = mlt_properties_get( properties, "_old_resource" );
57 // Create a composite if we don't have one
58 if ( composite == NULL )
60 // Create composite via the factory
61 mlt_profile profile = mlt_service_profile( MLT_FILTER_SERVICE( this ) );
62 composite = mlt_factory_transition( profile, "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 mlt_profile profile = mlt_service_profile( MLT_FILTER_SERVICE( this ) );
93 producer = mlt_factory_producer( profile, factory, resource );
96 if ( producer != NULL )
98 // Register the producer for reuse/destruction
99 mlt_properties_set_data( properties, "producer", producer, 0, ( mlt_destructor )mlt_producer_close, NULL );
101 // Ensure that we loop
102 mlt_properties_set( MLT_PRODUCER_PROPERTIES( producer ), "eof", "loop" );
104 // Set the old resource
105 mlt_properties_set( properties, "_old_resource", resource );
109 if ( producer != NULL )
111 // Get the producer properties
112 mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
114 // Now pass all producer. properties on the filter down
115 mlt_properties_pass( producer_properties, properties, "producer." );
118 // Only continue if we have both producer and composite
119 if ( composite != NULL && producer != NULL )
121 // Get the service of the producer
122 mlt_service service = MLT_PRODUCER_SERVICE( producer );
124 // We will get the 'b frame' from the producer
125 mlt_frame b_frame = NULL;
127 // Get the unique id of the filter (used to reacquire the producer position)
128 char *name = mlt_properties_get( properties, "_unique_id" );
130 // Get the original producer position
131 mlt_position position = mlt_properties_get_position( MLT_FRAME_PROPERTIES( frame ), name );
133 // Make sure the producer is in the correct position
134 mlt_producer_seek( producer, position );
136 // Resetting position to appease the composite transition
137 mlt_frame_set_position( frame, position );
139 // Get the b frame and process with composite if successful
140 if ( mlt_service_get_frame( service, &b_frame, 0 ) == 0 )
142 // Get the a and b frame properties
143 mlt_properties a_props = MLT_FRAME_PROPERTIES( frame );
144 mlt_properties b_props = MLT_FRAME_PROPERTIES( b_frame );
146 // Set the b frame to be in the same position and have same consumer requirements
147 mlt_frame_set_position( b_frame, position );
148 mlt_properties_set_double( b_props, "consumer_aspect_ratio", mlt_properties_get_double( a_props, "consumer_aspect_ratio" ) );
149 mlt_properties_set_int( b_props, "consumer_deinterlace", mlt_properties_get_int( a_props, "consumer_deinterlace" ) || mlt_properties_get_int( properties, "deinterlace" ) );
150 mlt_properties_set_double( b_props, "output_ratio", mlt_properties_get_double( a_props, "output_ratio" ) );
152 // Check for the special case - no aspect ratio means no problem :-)
153 if ( mlt_frame_get_aspect_ratio( b_frame ) == 0 )
154 mlt_properties_set_double( b_props, "aspect_ratio", mlt_properties_get_double( a_props, "consumer_aspect_ratio" ) );
155 if ( mlt_frame_get_aspect_ratio( frame ) == 0 )
156 mlt_properties_set_double( a_props, "aspect_ratio", mlt_properties_get_double( a_props, "consumer_aspect_ratio" ) );
158 mlt_properties_set_int( b_props, "normalised_width", mlt_properties_get_int( a_props, "normalised_width" ) );
159 mlt_properties_set_int( b_props, "normalised_height", mlt_properties_get_int( a_props, "normalised_height" ) );
161 if ( mlt_properties_get_int( properties, "distort" ) )
163 mlt_properties_set_int( MLT_TRANSITION_PROPERTIES( composite ), "distort", 1 );
164 mlt_properties_set_int( a_props, "distort", 1 );
165 mlt_properties_set_int( b_props, "distort", 1 );
168 if ( mlt_properties_get_int( properties, "reverse" ) == 0 )
170 // Apply all filters that are attached to this filter to the b frame
171 mlt_service_apply_filters( MLT_FILTER_SERVICE( this ), b_frame, 0 );
174 mlt_transition_process( composite, frame, b_frame );
177 error = mlt_frame_get_image( frame, image, format, width, height, 1 );
183 uint8_t *alpha = NULL;
184 const char *rescale = mlt_properties_get( a_props, "rescale.interp" );
185 if ( rescale == NULL || !strcmp( rescale, "none" ) )
187 mlt_transition_process( composite, b_frame, frame );
188 mlt_properties_set_int( a_props, "consumer_deinterlace", 1 );
189 mlt_properties_set_int( b_props, "consumer_deinterlace", 1 );
190 mlt_properties_set( a_props, "rescale.interp", rescale );
191 mlt_properties_set( b_props, "rescale.interp", rescale );
192 mlt_service_apply_filters( MLT_FILTER_SERVICE( this ), b_frame, 0 );
193 error = mlt_frame_get_image( b_frame, image, format, width, height, 1 );
194 alpha = mlt_frame_get_alpha_mask( b_frame );
195 mlt_properties_set_data( a_props, "image", *image, *width * *height * 2, NULL, NULL );
196 mlt_properties_set_data( a_props, "alpha", alpha, *width * *height, NULL, NULL );
197 mlt_properties_set_int( a_props, "width", *width );
198 mlt_properties_set_int( a_props, "height", *height );
199 mlt_properties_set_int( a_props, "progressive", 1 );
200 mlt_properties_inc_ref( b_props );
201 strcpy( temp, "_b_frame" );
202 while( mlt_properties_get_data( a_props, temp, NULL ) != NULL )
203 sprintf( temp, "_b_frame%d", count ++ );
204 mlt_properties_set_data( a_props, temp, b_frame, 0, ( mlt_destructor )mlt_frame_close, NULL );
209 mlt_frame_close( b_frame );
213 // Get the image from the frame without running fx
214 error = mlt_frame_get_image( frame, image, format, width, height, 1 );
220 /** Filter processing.
223 static mlt_frame filter_process( mlt_filter this, mlt_frame frame )
225 // Get the properties of the frame
226 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
228 // Get a unique name to store the frame position
229 char *name = mlt_properties_get( MLT_FILTER_PROPERTIES( this ), "_unique_id" );
231 // Assign the frame out point to the filter (just in case we need it later)
232 mlt_properties_set_int( MLT_FILTER_PROPERTIES( this ), "_out", mlt_properties_get_int( properties, "out" ) );
234 // Assign the current position to the name
235 mlt_properties_set_position( properties, name, mlt_frame_get_position( frame ) - mlt_filter_get_in( this ) );
237 // Push the filter on to the stack
238 mlt_frame_push_service( frame, this );
240 // Push the get_image on to the stack
241 mlt_frame_push_get_image( frame, filter_get_image );
246 /** Constructor for the filter.
249 mlt_filter filter_watermark_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
251 mlt_filter this = mlt_filter_new( );
254 mlt_properties properties = MLT_FILTER_PROPERTIES( this );
255 this->process = filter_process;
256 mlt_properties_set( properties, "factory", mlt_environment( "MLT_PRODUCER" ) );
258 mlt_properties_set( properties, "resource", arg );
259 // Ensure that attached filters are handled privately
260 mlt_properties_set_int( properties, "_filter_private", 1 );