2 * Copyright 2013 Sveriges Television AB http://casparcg.com/
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4 * This file is part of CasparCG (www.casparcg.com).
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6 * CasparCG is free software: you can redistribute it and/or modify
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7 * it under the terms of the GNU General Public License as published by
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8 * the Free Software Foundation, either version 3 of the License, or
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9 * (at your option) any later version.
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11 * CasparCG is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 * GNU General Public License for more details.
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16 * You should have received a copy of the GNU General Public License
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17 * along with CasparCG. If not, see <http://www.gnu.org/licenses/>.
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19 * Author: Robert Nagy, ronag89@gmail.com
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22 #include "../stdafx.h"
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26 #include "frame_producer.h"
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27 #include "frame/basic_frame.h"
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29 #include <boost/property_tree/ptree.hpp>
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31 namespace caspar { namespace core {
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33 struct layer::implementation
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35 safe_ptr<frame_producer> foreground_;
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36 safe_ptr<frame_producer> background_;
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37 int64_t frame_number_;
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38 int32_t auto_play_delta_;
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40 int64_t current_frame_age_;
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41 safe_ptr<monitor::subject> monitor_subject_;
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44 implementation(int index)
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45 : foreground_(frame_producer::empty())
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46 , background_(frame_producer::empty())
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48 , auto_play_delta_(-1)
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50 , monitor_subject_(make_safe<monitor::subject>("/layer/" + boost::lexical_cast<std::string>(index)))
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64 void load(const safe_ptr<frame_producer>& producer, bool preview, int auto_play_delta)
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66 background_ = producer;
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67 auto_play_delta_ = auto_play_delta;
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69 if(auto_play_delta_ > -1 && foreground_ == frame_producer::empty())
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72 if(preview) // Play the first frame and pause.
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75 receive(frame_producer::NO_HINT);
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82 if(background_ != frame_producer::empty())
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84 background_->set_leading_producer(foreground_);
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86 set_foreground(background_);
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88 background_ = frame_producer::empty();
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90 auto_play_delta_ = -1;
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98 set_foreground(frame_producer::empty());
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100 background_ = background_;
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102 auto_play_delta_ = -1;
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104 is_paused_ = false;
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107 safe_ptr<basic_frame> receive(int hints)
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111 *monitor_subject_ << monitor::message("/paused") % is_paused_;
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115 if(foreground_->last_frame() == basic_frame::empty())
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116 foreground_->receive(frame_producer::NO_HINT);
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118 return disable_audio(foreground_->last_frame());
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121 auto foreground = foreground_;
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123 auto frame = receive_and_follow(foreground, hints);
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125 if(foreground != foreground_)
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126 set_foreground(foreground);
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128 if(frame == core::basic_frame::late())
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129 return foreground_->last_frame();
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131 auto frames_left = static_cast<int64_t>(foreground_->nb_frames()) - static_cast<int64_t>(++frame_number_) - static_cast<int64_t>(auto_play_delta_);
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132 if(auto_play_delta_ > -1 && frames_left < 1)
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135 return receive(hints);
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138 current_frame_age_ = frame->get_and_record_age_millis();
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144 CASPAR_LOG_CURRENT_EXCEPTION();
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146 return core::basic_frame::empty();
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150 boost::unique_future<std::wstring> call(bool foreground, const std::wstring& param)
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152 return (foreground ? foreground_ : background_)->call(param);
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157 return background_ == core::frame_producer::empty() && foreground_ == core::frame_producer::empty();
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160 boost::property_tree::wptree info() const
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162 boost::property_tree::wptree info;
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163 info.add(L"status", is_paused_ ? L"paused" : (foreground_ == frame_producer::empty() ? L"stopped" : L"playing"));
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164 info.add(L"auto_delta", auto_play_delta_);
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165 info.add(L"frame-number", frame_number_);
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167 auto nb_frames = foreground_->nb_frames();
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169 info.add(L"nb_frames", nb_frames == std::numeric_limits<int64_t>::max() ? -1 : nb_frames);
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170 info.add(L"frames-left", nb_frames == std::numeric_limits<int64_t>::max() ? -1 : (foreground_->nb_frames() - frame_number_ - auto_play_delta_));
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171 info.add(L"frame-age", current_frame_age_);
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172 info.add_child(L"foreground.producer", foreground_->info());
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173 info.add_child(L"background.producer", background_->info());
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177 boost::property_tree::wptree delay_info() const
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179 boost::property_tree::wptree info;
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180 info.add(L"producer", foreground_->print());
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181 info.add(L"frame-age", current_frame_age_);
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185 void set_foreground(safe_ptr<core::frame_producer> producer)
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187 foreground_->monitor_output().detach_parent();
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188 foreground_ = producer;
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189 foreground_->monitor_output().attach_parent(monitor_subject_);
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193 layer::layer(int index) : impl_(new implementation(index)){}
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194 layer::layer(layer&& other) : impl_(std::move(other.impl_)){}
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195 layer& layer::operator=(layer&& other)
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197 impl_ = std::move(other.impl_);
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200 void layer::swap(layer& other)
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202 impl_.swap(other.impl_);
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204 void layer::load(const safe_ptr<frame_producer>& frame_producer, bool preview, int auto_play_delta){return impl_->load(frame_producer, preview, auto_play_delta);}
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205 void layer::play(){impl_->play();}
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206 void layer::pause(){impl_->pause();}
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207 void layer::resume(){impl_->resume();}
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208 void layer::stop(){impl_->stop();}
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209 bool layer::is_paused() const{return impl_->is_paused_;}
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210 int64_t layer::frame_number() const{return impl_->frame_number_;}
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211 safe_ptr<basic_frame> layer::receive(int hints) {return impl_->receive(hints);}
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212 safe_ptr<frame_producer> layer::foreground() const { return impl_->foreground_;}
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213 safe_ptr<frame_producer> layer::background() const { return impl_->background_;}
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214 bool layer::empty() const {return impl_->empty();}
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215 boost::unique_future<std::wstring> layer::call(bool foreground, const std::wstring& param){return impl_->call(foreground, param);}
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216 boost::property_tree::wptree layer::info() const{return impl_->info();}
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217 boost::property_tree::wptree layer::delay_info() const{return impl_->delay_info();}
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218 monitor::subject& layer::monitor_output(){return *impl_->monitor_subject_;}
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