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_;
  42
  43         const transition_info                           info_;
  44
  45         spl::shared_ptr<frame_producer>         dest_producer_;
  46         spl::shared_ptr<frame_producer>         source_producer_;
  47
  48         bool                                                            paused_;
  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                 , current_frame_(0)
  54                 , info_(info)
  55                 , dest_producer_(dest)
  56                 , source_producer_(frame_producer::empty())
  57                 , paused_(false)
  58         {
  59                 dest->monitor_output().attach_parent(monitor_subject_);
  60
  61                 CASPAR_LOG(info) << print() << L" Initialized";
  62         }
  63
  64         // frame_producer
  65
  66         void leading_producer(const spl::shared_ptr<frame_producer>& producer) override
  67         {
  68                 source_producer_ = producer;
  69         }
  70
  71         draw_frame receive_impl() override
  72         {
  73                 if(current_frame_ >= info_.duration)
  74                 {
  75                         source_producer_ = core::frame_producer::empty();
  76                         return dest_producer_->receive();
  77                 }
  78
  79                 current_frame_ += 1;
  80
  81                 auto dest = draw_frame::empty();
  82                 auto source = draw_frame::empty();
  83
  84                 tbb::parallel_invoke(
  85                 [&]
  86                 {
  87                         dest = dest_producer_->receive();
  88                         if(dest == core::draw_frame::late())
  89                                 dest = dest_producer_->last_frame();
  90                 },
  91                 [&]
  92                 {
  93                         source = source_producer_->receive();
  94                         if(source == core::draw_frame::late())
  95                                 source = source_producer_->last_frame();
  96                 });
  97
  98                 *monitor_subject_       << monitor::message("/transition/frame") % current_frame_ % info_.duration
  99                                                         << monitor::message("/transition/type") % [&]() -> std::string
 100                                                                                                                                 {
 101                                                                                                                                         switch(info_.type)
 102                                                                                                                                         {
 103                                                                                                                                         case transition_type::mix:              return "mix";
 104                                                                                                                                         case transition_type::wipe:             return "wipe";
 105                                                                                                                                         case transition_type::slide:    return "slide";
 106                                                                                                                                         case transition_type::push:             return "push";
 107                                                                                                                                         case transition_type::cut:              return "cut";
 108                                                                                                                                         default:                                                return "n/a";
 109                                                                                                                                         }
 110                                                                                                                                 }();
 111
 112                 return compose(dest, source);
 113         }
 114
 115         draw_frame last_frame() override
 116         {
 117                 if(current_frame_ >= info_.duration)
 118                         return dest_producer_->last_frame();
 119
 120                 return frame_producer_base::last_frame();
 121         }
 122
 123         constraints& pixel_constraints() override
 124         {
 125                 return dest_producer_->pixel_constraints();
 126         }
 127
 128         uint32_t nb_frames() const override
 129         {
 130                 return dest_producer_->nb_frames();
 131         }
 132
 133         std::wstring print() const override
 134         {
 135                 return L"transition[" + source_producer_->print() + L"=>" + dest_producer_->print() + L"]";
 136         }
 137
 138         std::wstring name() const override
 139         {
 140                 return L"transition";
 141         }
 142
 143         boost::property_tree::wptree info() const override
 144         {
 145                 return dest_producer_->info();
 146         }
 147
 148         std::future<std::wstring> call(const std::vector<std::wstring>& params) override
 149         {
 150                 return dest_producer_->call(params);
 151         }
 152
 153         // transition_producer
 154
 155         draw_frame compose(draw_frame dest_frame, draw_frame src_frame) const
 156         {
 157                 if(info_.type == transition_type::cut)
 158                         return src_frame;
 159
 160                 const double delta1 = info_.tweener(current_frame_*2-1, 0.0, 1.0, static_cast<double>(info_.duration*2));
 161                 const double delta2 = info_.tweener(current_frame_*2,   0.0, 1.0, static_cast<double>(info_.duration*2));
 162
 163                 const double dir = info_.direction == transition_direction::from_left ? 1.0 : -1.0;
 164
 165                 // For interlaced transitions. Seperate fields into seperate frames which are transitioned accordingly.
 166
 167                 src_frame.transform().audio_transform.volume = 1.0-delta2;
 168                 auto s_frame1 = src_frame;
 169                 auto s_frame2 = src_frame;
 170
 171                 dest_frame.transform().audio_transform.volume = delta2;
 172                 auto d_frame1 = dest_frame;
 173                 auto d_frame2 = dest_frame;
 174
 175                 if(info_.type == transition_type::mix)
 176                 {
 177                         d_frame1.transform().image_transform.opacity = delta1;
 178                         d_frame1.transform().image_transform.is_mix = true;
 179                         d_frame2.transform().image_transform.opacity = delta2;
 180                         d_frame2.transform().image_transform.is_mix = true;
 181
 182                         s_frame1.transform().image_transform.opacity = 1.0-delta1;
 183                         s_frame1.transform().image_transform.is_mix = true;
 184                         s_frame2.transform().image_transform.opacity = 1.0-delta2;
 185                         s_frame2.transform().image_transform.is_mix = true;
 186                 }
 187                 if(info_.type == transition_type::slide)
 188                 {
 189                         d_frame1.transform().image_transform.fill_translation[0] = (-1.0+delta1)*dir;
 190                         d_frame2.transform().image_transform.fill_translation[0] = (-1.0+delta2)*dir;
 191                 }
 192                 else if(info_.type == transition_type::push)
 193                 {
 194                         d_frame1.transform().image_transform.fill_translation[0] = (-1.0+delta1)*dir;
 195                         d_frame2.transform().image_transform.fill_translation[0] = (-1.0+delta2)*dir;
 196
 197                         s_frame1.transform().image_transform.fill_translation[0] = (0.0+delta1)*dir;
 198                         s_frame2.transform().image_transform.fill_translation[0] = (0.0+delta2)*dir;
 199                 }
 200                 else if(info_.type == transition_type::wipe)
 201                 {
 202                         d_frame1.transform().image_transform.clip_scale[0] = delta1;
 203                         d_frame2.transform().image_transform.clip_scale[0] = delta2;
 204                 }
 205
 206                 const auto s_frame = s_frame1.transform() == s_frame2.transform() ? s_frame2 : draw_frame::interlace(s_frame1, s_frame2, mode_);
 207                 const auto d_frame = d_frame1.transform() == d_frame2.transform() ? d_frame2 : draw_frame::interlace(d_frame1, d_frame2, mode_);
 208
 209                 return draw_frame::over(s_frame, d_frame);
 210         }
 211
 212         monitor::subject& monitor_output()
 213         {
 214                 return *monitor_subject_;
 215         }
 216
 217         void on_interaction(const interaction_event::ptr& event) override
 218         {
 219                 dest_producer_->on_interaction(event);
 220         }
 221
 222         bool collides(double x, double y) const override
 223         {
 224                 return dest_producer_->collides(x, y);
 225         }
 226 };
 227
 228 spl::shared_ptr<frame_producer> create_transition_producer(const field_mode& mode, const spl::shared_ptr<frame_producer>& destination, const transition_info& info)
 229 {
 230         return spl::make_shared<transition_producer>(mode, destination, info);
 231 }
 232
 233 }}
 234