2 * filter_movit_resize.cpp
3 * Copyright (C) 2013 Dan Dennedy <dan@dennedy.org>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software Foundation,
17 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 #include <framework/mlt.h>
26 #include "filter_glsl_manager.h"
27 #include <movit/init.h>
28 #include <movit/padding_effect.h>
29 #include "optional_effect.h"
31 using namespace movit;
33 static float alignment_parse( char* align )
38 else if ( isdigit( align[ 0 ] ) )
40 else if ( align[ 0 ] == 'c' || align[ 0 ] == 'm' )
42 else if ( align[ 0 ] == 'r' || align[ 0 ] == 'b' )
48 static int get_image( mlt_frame frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
51 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
52 mlt_filter filter = (mlt_filter) mlt_frame_pop_service( frame );
53 mlt_profile profile = mlt_service_profile( MLT_FILTER_SERVICE( filter ) );
55 // Retrieve the aspect ratio
56 double aspect_ratio = mlt_frame_get_aspect_ratio( frame );
57 double consumer_aspect = mlt_profile_sar( profile );
59 // Correct Width/height if necessary
60 if ( *width == 0 || *height == 0 )
62 *width = profile->width;
63 *height = profile->height;
66 // Assign requested width/height from our subordinate
68 int oheight = *height;
70 // Use a mlt_rect to compute position and size
72 rect.x = rect.y = 0.0;
73 if ( mlt_properties_get( properties, "resize.rect" ) ) {
74 mlt_position position = mlt_filter_get_position( filter, frame );
75 mlt_position length = mlt_filter_get_length2( filter, frame );
76 rect = mlt_properties_anim_get_rect( properties, "resize.rect", position, length );
77 if ( strchr( mlt_properties_get( properties, "resize.rect" ), '%' ) ) {
78 rect.x *= profile->width;
79 rect.w *= profile->width;
80 rect.y *= profile->height;
81 rect.h *= profile->height;
83 if ( !mlt_properties_get_int( properties, "resize.fill" ) ) {
84 int x = mlt_properties_get_int( properties, "meta.media.width" );
85 rect.w = rect.w > x ? x : rect.w;
86 x = mlt_properties_get_int( properties, "meta.media.height" );
87 rect.h = rect.h > x ? x : rect.h;
89 owidth = lrintf( rect.w );
90 oheight = lrintf( rect.h );
93 // Check for the special case - no aspect ratio means no problem :-)
94 if ( aspect_ratio == 0.0 )
95 aspect_ratio = consumer_aspect;
97 // Reset the aspect ratio
98 mlt_properties_set_double( properties, "aspect_ratio", aspect_ratio );
100 // Skip processing if requested.
101 char *rescale = mlt_properties_get( properties, "rescale.interp" );
102 if ( *format == mlt_image_none || ( rescale && !strcmp( rescale, "none" ) ) )
103 return mlt_frame_get_image( frame, image, format, width, height, writable );
105 if ( mlt_properties_get_int( properties, "distort" ) == 0 )
107 // Normalise the input and out display aspect
108 int normalised_width = profile->width;
109 int normalised_height = profile->height;
110 int real_width = mlt_properties_get_int( properties, "meta.media.width" );
111 int real_height = mlt_properties_get_int( properties, "meta.media.height" );
112 if ( real_width == 0 )
113 real_width = mlt_properties_get_int( properties, "width" );
114 if ( real_height == 0 )
115 real_height = mlt_properties_get_int( properties, "height" );
116 double input_ar = aspect_ratio * real_width / real_height;
117 double output_ar = consumer_aspect * owidth / oheight;
119 // Optimised for the input_ar > output_ar case (e.g. widescreen on standard)
120 int scaled_width = lrint( ( input_ar * normalised_width ) / output_ar );
121 int scaled_height = normalised_height;
123 // Now ensure that our images fit in the output frame
124 if ( scaled_width > normalised_width )
126 scaled_width = normalised_width;
127 scaled_height = lrint( ( output_ar * normalised_height ) / input_ar );
130 // Now calculate the actual image size that we want
131 owidth = lrint( scaled_width * owidth / normalised_width );
132 oheight = lrint( scaled_height * oheight / normalised_height );
134 mlt_log_debug( MLT_FILTER_SERVICE(filter),
135 "real %dx%d normalised %dx%d output %dx%d sar %f in-dar %f out-dar %f\n",
136 real_width, real_height, normalised_width, normalised_height, owidth, oheight, aspect_ratio, input_ar, output_ar);
138 // Tell frame we have conformed the aspect to the consumer
139 mlt_frame_set_aspect_ratio( frame, consumer_aspect );
142 mlt_properties_set_int( properties, "distort", 0 );
145 *format = mlt_image_glsl;
146 error = mlt_frame_get_image( frame, image, format, &owidth, &oheight, writable );
148 // Offset the position according to alignment
149 float w = float( *width - owidth );
150 float h = float( *height - oheight );
151 if ( mlt_properties_get( properties, "resize.rect" ) ) {
152 // default left if rect supplied
153 rect.x += w * alignment_parse( mlt_properties_get( properties, "resize.halign" ) ) / 2.0f;
154 rect.y += h * alignment_parse( mlt_properties_get( properties, "resize.valign" ) ) / 2.0f;
156 // default center if no rect
162 mlt_properties filter_properties = MLT_FILTER_PROPERTIES( filter );
163 GlslManager::get_instance()->lock_service( frame );
164 mlt_properties_set_int( filter_properties, "_movit.parms.int.width", *width );
165 mlt_properties_set_int( filter_properties, "_movit.parms.int.height", *height );
166 mlt_properties_set_double( filter_properties, "_movit.parms.float.left", rect.x );
167 mlt_properties_set_double( filter_properties, "_movit.parms.float.top", rect.y );
169 bool disable = ( *width == owidth && *height == oheight );
170 mlt_properties_set_int( filter_properties, "_movit.parms.int.disable", disable );
172 GlslManager::get_instance()->unlock_service( frame );
174 GlslManager::set_effect_input( MLT_FILTER_SERVICE( filter ), frame, (mlt_service) *image );
175 GlslManager::set_effect( MLT_FILTER_SERVICE( filter ), frame, new OptionalEffect<PaddingEffect> );
176 *image = (uint8_t *) MLT_FILTER_SERVICE( filter );
183 static mlt_frame process( mlt_filter filter, mlt_frame frame )
185 mlt_frame_push_service( frame, filter );
186 mlt_frame_push_get_image( frame, get_image );
191 mlt_filter filter_movit_resize_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
193 mlt_filter filter = NULL;
194 GlslManager* glsl = GlslManager::get_instance();
196 if ( glsl && ( filter = mlt_filter_new() ) )
198 mlt_properties properties = MLT_FILTER_PROPERTIES( filter );
199 glsl->add_ref( properties );
200 filter->process = process;