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 "glsl_manager.h"
27 #include <movit/init.h>
28 #include <movit/padding_effect.h>
30 static float alignment_parse( char* align )
35 else if ( isdigit( align[ 0 ] ) )
37 else if ( align[ 0 ] == 'c' || align[ 0 ] == 'm' )
39 else if ( align[ 0 ] == 'r' || align[ 0 ] == 'b' )
45 static struct mlt_geometry_item_s get_geometry( mlt_profile profile, mlt_filter filter, mlt_frame frame )
47 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
48 mlt_properties filter_props = MLT_FILTER_PROPERTIES( filter );
49 struct mlt_geometry_item_s item;
50 mlt_geometry geometry = (mlt_geometry) mlt_properties_get_data( filter_props, "geometry", NULL );
51 char *string = mlt_properties_get( properties, "resize.geometry" );
52 int length = mlt_filter_get_length2( filter, frame );
55 geometry = mlt_geometry_init();
56 mlt_properties_set_data( filter_props, "geometry", geometry, 0,
57 (mlt_destructor) mlt_geometry_close, NULL );
58 mlt_geometry_parse( geometry, string, length, profile->width, profile->height );
60 mlt_geometry_refresh( geometry, string, length, profile->width, profile->height );
63 mlt_geometry_fetch( geometry, &item, mlt_filter_get_position( filter, frame ) );
65 if ( !mlt_properties_get_int( properties, "resize.fill" ) ) {
66 int x = mlt_properties_get_int( properties, "meta.media.width" );
67 item.w = item.w > x ? x : item.w;
68 x = mlt_properties_get_int( properties, "meta.media.height" );
69 item.h = item.h > x ? x : item.h;
75 static int get_image( mlt_frame frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
78 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
79 mlt_filter filter = (mlt_filter) mlt_frame_pop_service( frame );
80 mlt_profile profile = mlt_service_profile( MLT_FILTER_SERVICE( filter ) );
82 // Retrieve the aspect ratio
83 double aspect_ratio = mlt_frame_get_aspect_ratio( frame );
84 double consumer_aspect = mlt_profile_sar( profile );
86 // Correct Width/height if necessary
87 if ( *width == 0 || *height == 0 )
89 *width = profile->width;
90 *height = profile->height;
93 // Assign requested width/height from our subordinate
95 int oheight = *height;
97 // Use a geometry to compute position and size
98 struct mlt_geometry_item_s geometry_item;
99 geometry_item.x = geometry_item.y = 0.0f;
100 geometry_item.distort = 0;
101 if ( mlt_properties_get( properties, "resize.geometry" ) ) {
102 geometry_item = get_geometry( profile, filter, frame );
103 owidth = lrintf( geometry_item.w );
104 oheight = lrintf( geometry_item.h );
107 // Check for the special case - no aspect ratio means no problem :-)
108 if ( aspect_ratio == 0.0 )
109 aspect_ratio = consumer_aspect;
111 // Reset the aspect ratio
112 mlt_properties_set_double( properties, "aspect_ratio", aspect_ratio );
114 // Skip processing if requested.
115 char *rescale = mlt_properties_get( properties, "rescale.interp" );
116 if ( *format == mlt_image_none || ( rescale && !strcmp( rescale, "none" ) ) )
117 return mlt_frame_get_image( frame, image, format, width, height, writable );
119 if ( mlt_properties_get_int( properties, "distort" ) == 0 &&
120 geometry_item.distort == 0 )
122 // Normalise the input and out display aspect
123 int normalised_width = profile->width;
124 int normalised_height = profile->height;
125 int real_width = mlt_properties_get_int( properties, "meta.media.width" );
126 int real_height = mlt_properties_get_int( properties, "meta.media.height" );
127 if ( real_width == 0 )
128 real_width = mlt_properties_get_int( properties, "width" );
129 if ( real_height == 0 )
130 real_height = mlt_properties_get_int( properties, "height" );
131 double input_ar = aspect_ratio * real_width / real_height;
132 double output_ar = consumer_aspect * owidth / oheight;
134 // Optimised for the input_ar > output_ar case (e.g. widescreen on standard)
135 int scaled_width = lrint( ( input_ar * normalised_width ) / output_ar );
136 int scaled_height = normalised_height;
138 // Now ensure that our images fit in the output frame
139 if ( scaled_width > normalised_width )
141 scaled_width = normalised_width;
142 scaled_height = lrint( ( output_ar * normalised_height ) / input_ar );
145 // Now calculate the actual image size that we want
146 owidth = lrint( scaled_width * owidth / normalised_width );
147 oheight = lrint( scaled_height * oheight / normalised_height );
149 mlt_log_debug( MLT_FILTER_SERVICE(filter),
150 "real %dx%d normalised %dx%d output %dx%d sar %f in-dar %f out-dar %f\n",
151 real_width, real_height, normalised_width, normalised_height, owidth, oheight, aspect_ratio, input_ar, output_ar);
153 // Tell frame we have conformed the aspect to the consumer
154 mlt_frame_set_aspect_ratio( frame, consumer_aspect );
157 mlt_properties_set_int( properties, "distort", 0 );
160 *format = mlt_image_glsl;
161 error = mlt_frame_get_image( frame, image, format, &owidth, &oheight, writable );
163 // Offset the position according to alignment
164 float w = float( *width - owidth );
165 float h = float( *height - oheight );
166 if ( mlt_properties_get( properties, "resize.geometry" ) ) {
167 // default left if geometry supplied
168 geometry_item.x += w * alignment_parse( mlt_properties_get( properties, "resize.halign" ) ) / 2.0f;
169 geometry_item.y += h * alignment_parse( mlt_properties_get( properties, "resize.valign" ) ) / 2.0f;
171 // default center if no geometry
172 geometry_item.x = w * 0.5f;
173 geometry_item.y = h * 0.5f;
177 Effect* effect = GlslManager::get_effect( filter, frame );
179 bool ok = effect->set_int( "width", *width );
180 ok |= effect->set_int( "height", *height );
181 ok |= effect->set_float( "left", geometry_item.x );
182 ok |= effect->set_float( "top", geometry_item.y );
190 static mlt_frame process( mlt_filter filter, mlt_frame frame )
192 if ( !GlslManager::get_effect( filter, frame ) )
193 GlslManager::add_effect( filter, frame, new PaddingEffect );
194 mlt_frame_push_service( frame, filter );
195 mlt_frame_push_get_image( frame, get_image );
200 mlt_filter filter_movit_resize_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
202 mlt_filter filter = NULL;
203 GlslManager* glsl = GlslManager::get_instance();
205 if ( glsl && ( filter = mlt_filter_new() ) )
207 filter->process = process;