git.sesse.net Git - casparcg/blob - core/producer/transition/transition_producer.cpp

   1 /*
   2 * Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>
   3 *
   4 * This file is part of CasparCG (www.casparcg.com).
   5 *
   6 * CasparCG is free software: you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License as published by
   8 * the Free Software Foundation, either version 3 of the License, or
   9 * (at your option) any later version.
  10 *
  11 * CasparCG 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
  14 * GNU General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU General Public License
  17 * along with CasparCG. If not, see <http://www.gnu.org/licenses/>.
  18 *
  19 * Author: Robert Nagy, ronag89@gmail.com
  20 */
  21
  22 #include "../../StdAfx.h"
  23
  24 #include "transition_producer.h"
  25
  26 #include "../frame_producer.h"
  27 #include "../../frame/draw_frame.h"
  28 #include "../../frame/frame_transform.h"
  29 #include "../../monitor/monitor.h"
  30
  31 #include <tbb/parallel_invoke.h>
  32
  33 #include <future>
  34
  35 namespace caspar { namespace core {
  36
  37 class transition_producer : public frame_producer_base
  38 {
  39         spl::shared_ptr<monitor::subject>       monitor_subject_;
  40         const field_mode                                        mode_;
  41         int                                                                     current_frame_          = 0;
  42
  43         const transition_info                           info_;
  44
  45         spl::shared_ptr<frame_producer>         dest_producer_;
  46         spl::shared_ptr<frame_producer>         source_producer_        = frame_producer::empty();
  47
  48         bool                                                            paused_                         = false;
  49
  50 public:
  51         explicit transition_producer(const field_mode& mode, const spl::shared_ptr<frame_producer>& dest, const transition_info& info)
  52                 : mode_(mode)
  53                 , info_(info)
  54                 , dest_producer_(dest)
  55         {
  56                 dest->monitor_output().attach_parent(monitor_subject_);
  57
  58                 CASPAR_LOG(info) << print() << L" Initialized";
  59         }
  60
  61         // frame_producer
  62
  63         void leading_producer(const spl::shared_ptr<frame_producer>& producer) override
  64         {
  65                 source_producer_ = producer;
  66         }
  67
  68         draw_frame receive_impl() override
  69         {
  70                 if(current_frame_ >= info_.duration)
  71                 {
  72                         source_producer_ = core::frame_producer::empty();
  73                         return dest_producer_->receive();
  74                 }
  75
  76                 current_frame_ += 1;
  77
  78                 auto dest = draw_frame::empty();
  79                 auto source = draw_frame::empty();
  80
  81                 tbb::parallel_invoke(
  82                 [&]
  83                 {
  84                         dest = dest_producer_->receive();
  85                         if(dest == core::draw_frame::late())
  86                                 dest = dest_producer_->last_frame();
  87                 },
  88                 [&]
  89                 {
  90                         source = source_producer_->receive();
  91                         if(source == core::draw_frame::late())
  92                                 source = source_producer_->last_frame();
  93                 });
  94
  95                 *monitor_subject_       << monitor::message("/transition/frame") % current_frame_ % info_.duration
  96                                                         << monitor::message("/transition/type") % [&]() -> std::string
  97                                                                                                                                 {
  98                                                                                                                                         switch(info_.type)
  99                                                                                                                                         {
 100                                                                                                                                         case transition_type::mix:              return "mix";
 101                                                                                                                                         case transition_type::wipe:             return "wipe";
 102                                                                                                                                         case transition_type::slide:    return "slide";
 103                                                                                                                                         case transition_type::push:             return "push";
 104                                                                                                                                         case transition_type::cut:              return "cut";
 105                                                                                                                                         default:                                                return "n/a";
 106                                                                                                                                         }
 107                                                                                                                                 }();
 108
 109                 return compose(dest, source);
 110         }
 111
 112         draw_frame last_frame() override
 113         {
 114                 if(current_frame_ >= info_.duration)
 115                         return dest_producer_->last_frame();
 116
 117                 return frame_producer_base::last_frame();
 118         }
 119
 120         constraints& pixel_constraints() override
 121         {
 122                 return dest_producer_->pixel_constraints();
 123         }
 124
 125         uint32_t nb_frames() const override
 126         {
 127                 return dest_producer_->nb_frames();
 128         }
 129
 130         uint32_t frame_number() const override
 131         {
 132                 return dest_producer_->frame_number();
 133         }
 134
 135         std::wstring print() const override
 136         {
 137                 return L"transition[" + source_producer_->print() + L"=>" + dest_producer_->print() + L"]";
 138         }
 139
 140         std::wstring name() const override
 141         {
 142                 return L"transition";
 143         }
 144
 145         boost::property_tree::wptree info() const override
 146         {
 147                 return dest_producer_->info();
 148         }
 149
 150         std::future<std::wstring> call(const std::vector<std::wstring>& params) override
 151         {
 152                 return dest_producer_->call(params);
 153         }
 154
 155         // transition_producer
 156
 157         draw_frame compose(draw_frame dest_frame, draw_frame src_frame) const
 158         {
 159                 if(info_.type == transition_type::cut)
 160                         return src_frame;
 161
 162                 const double delta1 = info_.tweener(current_frame_*2-1, 0.0, 1.0, static_cast<double>(info_.duration*2));
 163                 const double delta2 = info_.tweener(current_frame_*2,   0.0, 1.0, static_cast<double>(info_.duration*2));
 164
 165                 const double dir = info_.direction == transition_direction::from_left ? 1.0 : -1.0;
 166
 167                 // For interlaced transitions. Seperate fields into seperate frames which are transitioned accordingly.
 168
 169                 src_frame.transform().audio_transform.volume = 1.0-delta2;
 170                 auto s_frame1 = src_frame;
 171                 auto s_frame2 = src_frame;
 172
 173                 dest_frame.transform().audio_transform.volume = delta2;
 174                 auto d_frame1 = dest_frame;
 175                 auto d_frame2 = dest_frame;
 176
 177                 if(info_.type == transition_type::mix)
 178                 {
 179                         d_frame1.transform().image_transform.opacity = delta1;
 180                         d_frame1.transform().image_transform.is_mix = true;
 181                         d_frame2.transform().image_transform.opacity = delta2;
 182                         d_frame2.transform().image_transform.is_mix = true;
 183
 184                         s_frame1.transform().image_transform.opacity = 1.0-delta1;
 185                         s_frame1.transform().image_transform.is_mix = true;
 186                         s_frame2.transform().image_transform.opacity = 1.0-delta2;
 187                         s_frame2.transform().image_transform.is_mix = true;
 188                 }
 189                 if(info_.type == transition_type::slide)
 190                 {
 191                         d_frame1.transform().image_transform.fill_translation[0] = (-1.0+delta1)*dir;
 192                         d_frame2.transform().image_transform.fill_translation[0] = (-1.0+delta2)*dir;
 193                 }
 194                 else if(info_.type == transition_type::push)
 195                 {
 196                         d_frame1.transform().image_transform.fill_translation[0] = (-1.0+delta1)*dir;
 197                         d_frame2.transform().image_transform.fill_translation[0] = (-1.0+delta2)*dir;
 198
 199                         s_frame1.transform().image_transform.fill_translation[0] = (0.0+delta1)*dir;
 200                         s_frame2.transform().image_transform.fill_translation[0] = (0.0+delta2)*dir;
 201                 }
 202                 else if(info_.type == transition_type::wipe)
 203                 {
 204                         d_frame1.transform().image_transform.clip_scale[0] = delta1;
 205                         d_frame2.transform().image_transform.clip_scale[0] = delta2;
 206                 }
 207
 208                 const auto s_frame = s_frame1.transform() == s_frame2.transform() ? s_frame2 : draw_frame::interlace(s_frame1, s_frame2, mode_);
 209                 const auto d_frame = d_frame1.transform() == d_frame2.transform() ? d_frame2 : draw_frame::interlace(d_frame1, d_frame2, mode_);
 210
 211                 return draw_frame::over(s_frame, d_frame);
 212         }
 213
 214         monitor::subject& monitor_output()
 215         {
 216                 return *monitor_subject_;
 217         }
 218
 219         void on_interaction(const interaction_event::ptr& event) override
 220         {
 221                 dest_producer_->on_interaction(event);
 222         }
 223
 224         bool collides(double x, double y) const override
 225         {
 226                 return dest_producer_->collides(x, y);
 227         }
 228 };
 229
 230 spl::shared_ptr<frame_producer> create_transition_producer(const field_mode& mode, const spl::shared_ptr<frame_producer>& destination, const transition_info& info)
 231 {
 232         return spl::make_shared<transition_producer>(mode, destination, info);
 233 }
 234
 235 }}
 236