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 namespace caspar { namespace core {
  34
  35 class transition_producer : public frame_producer_base
  36 {
  37         spl::shared_ptr<monitor::subject>       monitor_subject_;
  38         const field_mode                                        mode_;
  39         int                                                                     current_frame_;
  40
  41         const transition_info                           info_;
  42
  43         spl::shared_ptr<frame_producer>         dest_producer_;
  44         spl::shared_ptr<frame_producer>         source_producer_;
  45
  46         bool                                                            paused_;
  47
  48 public:
  49         explicit transition_producer(const field_mode& mode, const spl::shared_ptr<frame_producer>& dest, const transition_info& info)
  50                 : mode_(mode)
  51                 , current_frame_(0)
  52                 , info_(info)
  53                 , dest_producer_(dest)
  54                 , source_producer_(frame_producer::empty())
  55                 , paused_(false)
  56         {
  57                 dest->monitor_output().attach_parent(monitor_subject_);
  58
  59                 CASPAR_LOG(info) << print() << L" Initialized";
  60         }
  61
  62         // frame_producer
  63
  64         void leading_producer(const spl::shared_ptr<frame_producer>& producer) override
  65         {
  66                 source_producer_ = producer;
  67         }
  68
  69         draw_frame receive_impl() override
  70         {
  71                 if(current_frame_ >= info_.duration)
  72                 {
  73                         source_producer_ = core::frame_producer::empty();
  74                         return dest_producer_->receive();
  75                 }
  76
  77                 current_frame_ += 1;
  78
  79                 auto dest = draw_frame::empty();
  80                 auto source = draw_frame::empty();
  81
  82                 tbb::parallel_invoke(
  83                 [&]
  84                 {
  85                         dest = dest_producer_->receive();
  86                         if(dest == core::draw_frame::late())
  87                                 dest = dest_producer_->last_frame();
  88                 },
  89                 [&]
  90                 {
  91                         source = source_producer_->receive();
  92                         if(source == core::draw_frame::late())
  93                                 source = source_producer_->last_frame();
  94                 });
  95
  96                 *monitor_subject_       << monitor::message("/transition/frame") % current_frame_ % info_.duration
  97                                                         << monitor::message("/transition/type") % [&]() -> std::string
  98                                                                                                                                 {
  99                                                                                                                                         switch(info_.type.value())
 100                                                                                                                                         {
 101                                                                                                                                         case transition_type::mix:              return "mix";
 102                                                                                                                                         case transition_type::wipe:             return "wipe";
 103                                                                                                                                         case transition_type::slide:    return "slide";
 104                                                                                                                                         case transition_type::push:             return "push";
 105                                                                                                                                         case transition_type::cut:              return "cut";
 106                                                                                                                                         default:                                                return "n/a";
 107                                                                                                                                         }
 108                                                                                                                                 }();
 109
 110                 return compose(dest, source);
 111         }
 112
 113         draw_frame last_frame() override
 114         {
 115                 if(current_frame_ >= info_.duration)
 116                         return dest_producer_->last_frame();
 117
 118                 return frame_producer_base::last_frame();
 119         }
 120
 121         constraints& pixel_constraints() override
 122         {
 123                 return dest_producer_->pixel_constraints();
 124         }
 125
 126         uint32_t nb_frames() const override
 127         {
 128                 return dest_producer_->nb_frames();
 129         }
 130
 131         std::wstring print() const override
 132         {
 133                 return L"transition[" + source_producer_->print() + L"=>" + dest_producer_->print() + L"]";
 134         }
 135
 136         std::wstring name() const override
 137         {
 138                 return L"transition";
 139         }
 140
 141         boost::property_tree::wptree info() const override
 142         {
 143                 return dest_producer_->info();
 144         }
 145
 146         boost::unique_future<std::wstring> call(const std::vector<std::wstring>& params) override
 147         {
 148                 return dest_producer_->call(params);
 149         }
 150
 151         // transition_producer
 152
 153         draw_frame compose(draw_frame dest_frame, draw_frame src_frame) const
 154         {
 155                 if(info_.type == transition_type::cut)
 156                         return src_frame;
 157
 158                 const double delta1 = info_.tweener(current_frame_*2-1, 0.0, 1.0, static_cast<double>(info_.duration*2));
 159                 const double delta2 = info_.tweener(current_frame_*2,   0.0, 1.0, static_cast<double>(info_.duration*2));
 160
 161                 const double dir = info_.direction == transition_direction::from_left ? 1.0 : -1.0;
 162
 163                 // For interlaced transitions. Seperate fields into seperate frames which are transitioned accordingly.
 164
 165                 src_frame.transform().audio_transform.volume = 1.0-delta2;
 166                 auto s_frame1 = src_frame;
 167                 auto s_frame2 = src_frame;
 168
 169                 dest_frame.transform().audio_transform.volume = delta2;
 170                 auto d_frame1 = dest_frame;
 171                 auto d_frame2 = dest_frame;
 172
 173                 if(info_.type == transition_type::mix)
 174                 {
 175                         d_frame1.transform().image_transform.opacity = delta1;
 176                         d_frame1.transform().image_transform.is_mix = true;
 177                         d_frame2.transform().image_transform.opacity = delta2;
 178                         d_frame2.transform().image_transform.is_mix = true;
 179
 180                         s_frame1.transform().image_transform.opacity = 1.0-delta1;
 181                         s_frame1.transform().image_transform.is_mix = true;
 182                         s_frame2.transform().image_transform.opacity = 1.0-delta2;
 183                         s_frame2.transform().image_transform.is_mix = true;
 184                 }
 185                 if(info_.type == transition_type::slide)
 186                 {
 187                         d_frame1.transform().image_transform.fill_translation[0] = (-1.0+delta1)*dir;
 188                         d_frame2.transform().image_transform.fill_translation[0] = (-1.0+delta2)*dir;
 189                 }
 190                 else if(info_.type == transition_type::push)
 191                 {
 192                         d_frame1.transform().image_transform.fill_translation[0] = (-1.0+delta1)*dir;
 193                         d_frame2.transform().image_transform.fill_translation[0] = (-1.0+delta2)*dir;
 194
 195                         s_frame1.transform().image_transform.fill_translation[0] = (0.0+delta1)*dir;
 196                         s_frame2.transform().image_transform.fill_translation[0] = (0.0+delta2)*dir;
 197                 }
 198                 else if(info_.type == transition_type::wipe)
 199                 {
 200                         d_frame1.transform().image_transform.clip_scale[0] = delta1;
 201                         d_frame2.transform().image_transform.clip_scale[0] = delta2;
 202                 }
 203
 204                 const auto s_frame = s_frame1.transform() == s_frame2.transform() ? s_frame2 : draw_frame::interlace(s_frame1, s_frame2, mode_);
 205                 const auto d_frame = d_frame1.transform() == d_frame2.transform() ? d_frame2 : draw_frame::interlace(d_frame1, d_frame2, mode_);
 206
 207                 return draw_frame::over(s_frame, d_frame);
 208         }
 209
 210         monitor::subject& monitor_output()
 211         {
 212                 return *monitor_subject_;
 213         }
 214
 215         void on_interaction(const interaction_event::ptr& event) override
 216         {
 217                 dest_producer_->on_interaction(event);
 218         }
 219
 220         bool collides(double x, double y) const override
 221         {
 222                 return dest_producer_->collides(x, y);
 223         }
 224 };
 225
 226 spl::shared_ptr<frame_producer> create_transition_producer(const field_mode& mode, const spl::shared_ptr<frame_producer>& destination, const transition_info& info)
 227 {
 228         return spl::make_shared<transition_producer>(mode, destination, info);
 229 }
 230
 231 }}
 232