git.sesse.net Git - mlt/blob - src/modules/opengl/filter_movit_lift_gamma_gain.cpp

   1 /*
   2  * filter_lift_gamma_gain.cpp
   3  * Copyright (C) 2013 Dan Dennedy <dan@dennedy.org>
   4  *
   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.
   9  *
  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.
  14  *
  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.
  18  */
  19
  20 #include <framework/mlt.h>
  21 #include <string.h>
  22 #include <assert.h>
  23
  24 #include "filter_glsl_manager.h"
  25 #include <movit/lift_gamma_gain_effect.h>
  26
  27 static int get_image( mlt_frame frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
  28 {
  29         mlt_filter filter = (mlt_filter) mlt_frame_pop_service( frame );
  30         mlt_properties properties = MLT_FILTER_PROPERTIES( filter );
  31         GlslManager::get_instance()->lock_service( frame );
  32         Effect* effect = GlslManager::get_effect( MLT_FILTER_SERVICE( filter ), frame );
  33         if ( effect ) {
  34                 mlt_position position = mlt_filter_get_position( filter, frame );
  35                 mlt_position length = mlt_filter_get_length2( filter, frame );
  36                 RGBTriplet triplet(
  37                         mlt_properties_anim_get_double( properties, "lift_r", position, length ),
  38                         mlt_properties_anim_get_double( properties, "lift_g", position, length ),
  39                         mlt_properties_anim_get_double( properties, "lift_b", position, length )
  40                 );
  41                 bool ok = effect->set_vec3( "lift", (float*) &triplet );
  42                 triplet.r = mlt_properties_anim_get_double( properties, "gamma_r", position, length );
  43                 triplet.g = mlt_properties_anim_get_double( properties, "gamma_g", position, length );
  44                 triplet.b = mlt_properties_anim_get_double( properties, "gamma_b", position, length );
  45                 ok |= effect->set_vec3( "gamma", (float*) &triplet );
  46                 triplet.r = mlt_properties_anim_get_double( properties, "gain_r", position, length );
  47                 triplet.g = mlt_properties_anim_get_double( properties, "gain_g", position, length );
  48                 triplet.b = mlt_properties_anim_get_double( properties, "gain_b", position, length );
  49                 ok |= effect->set_vec3( "gain", (float*) &triplet );
  50                 assert(ok);
  51         }
  52         GlslManager::get_instance()->unlock_service( frame );
  53         *format = mlt_image_glsl;
  54         return mlt_frame_get_image( frame, image, format, width, height, writable );
  55 }
  56
  57 static mlt_frame process( mlt_filter filter, mlt_frame frame )
  58 {
  59         if ( !mlt_frame_is_test_card( frame ) ) {
  60                 if ( !GlslManager::get_effect( MLT_FILTER_SERVICE( filter ), frame ) )
  61                         GlslManager::add_effect( MLT_FILTER_SERVICE( filter ), frame, new LiftGammaGainEffect );
  62         }
  63         mlt_frame_push_service( frame, filter );
  64         mlt_frame_push_get_image( frame, get_image );
  65         return frame;
  66 }
  67
  68 extern "C" {
  69
  70 mlt_filter filter_lift_gamma_gain_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
  71 {
  72         mlt_filter filter = NULL;
  73         GlslManager* glsl = GlslManager::get_instance();
  74
  75         if ( glsl && ( filter = mlt_filter_new() ) ) {
  76                 mlt_properties properties = MLT_FILTER_PROPERTIES( filter );
  77                 mlt_properties_set_double( properties, "lift_r", 0.0 );
  78                 mlt_properties_set_double( properties, "lift_g", 0.0 );
  79                 mlt_properties_set_double( properties, "lift_b", 0.0 );
  80                 mlt_properties_set_double( properties, "gamma_r", 1.0 );
  81                 mlt_properties_set_double( properties, "gamma_g", 1.0 );
  82                 mlt_properties_set_double( properties, "gamma_b", 1.0 );
  83                 mlt_properties_set_double( properties, "gain_r", 1.0 );
  84                 mlt_properties_set_double( properties, "gain_g", 1.0 );
  85                 mlt_properties_set_double( properties, "gain_b", 1.0 );
  86                 filter->process = process;
  87         }
  88         return filter;
  89 }
  90
  91 }