2 * copyright (c) 2010 Sveriges Television AB <info@casparcg.com>
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4 * This file is part of CasparCG.
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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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21 #include "../StdAfx.h"
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23 #include "frame_producer.h"
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24 #include "frame/basic_frame.h"
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25 #include "frame/frame_transform.h"
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27 #include "color/color_producer.h"
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28 #include "separated/separated_producer.h"
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30 #include <common/memory/safe_ptr.h>
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31 #include <common/concurrency/executor.h>
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32 #include <common/exception/exceptions.h>
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33 #include <common/utility/move_on_copy.h>
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35 namespace caspar { namespace core {
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37 std::vector<const producer_factory_t> g_factories;
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39 class destroy_producer_proxy : public frame_producer
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41 safe_ptr<frame_producer> producer_;
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42 executor& destroy_context_;
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44 destroy_producer_proxy(executor& destroy_context, const safe_ptr<frame_producer>& producer)
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45 : producer_(producer)
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46 , destroy_context_(destroy_context){}
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48 ~destroy_producer_proxy()
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50 if(destroy_context_.size() > 4)
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51 CASPAR_LOG(error) << L" Potential destroyer deadlock.";
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53 // Hacks to bypass compiler bugs.
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54 auto mov_producer = make_move_on_copy<safe_ptr<frame_producer>>(std::move(producer_));
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55 auto empty_producer = frame_producer::empty();
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56 destroy_context_.begin_invoke([=]
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58 if(!mov_producer.value.unique())
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59 CASPAR_LOG(debug) << mov_producer.value->print() << L" Not destroyed on safe asynchronous destruction thread.";
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61 CASPAR_LOG(debug) << mov_producer.value->print() << L" Destroying on safe asynchronous destruction thread.";
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63 mov_producer.value = empty_producer;
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67 virtual safe_ptr<basic_frame> receive(int hints) {return producer_->receive(hints);}
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68 virtual safe_ptr<basic_frame> last_frame() const {return producer_->last_frame();}
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69 virtual std::wstring print() const {return producer_->print();}
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70 virtual void param(const std::wstring& str) {producer_->param(str);}
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71 virtual safe_ptr<frame_producer> get_following_producer() const {return producer_->get_following_producer();}
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72 virtual void set_leading_producer(const safe_ptr<frame_producer>& producer) {producer_->set_leading_producer(producer);}
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73 virtual int64_t nb_frames() const {return producer_->nb_frames();}
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76 safe_ptr<core::frame_producer> create_destroy_producer_proxy(executor& destroy_context, const safe_ptr<frame_producer>& producer)
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78 return make_safe<destroy_producer_proxy>(destroy_context, producer);
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81 class last_frame_producer : public frame_producer
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83 const std::wstring print_;
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84 const safe_ptr<basic_frame> frame_;
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85 const int64_t nb_frames_;
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87 last_frame_producer(const safe_ptr<frame_producer>& producer)
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88 : print_(producer->print())
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89 , frame_(producer->last_frame() != basic_frame::eof() ? producer->last_frame() : basic_frame::empty())
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90 , nb_frames_(producer->nb_frames())
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94 virtual safe_ptr<basic_frame> receive(int){return frame_;}
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95 virtual safe_ptr<core::basic_frame> last_frame() const{return frame_;}
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96 virtual std::wstring print() const{return L"dummy[" + print_ + L"]";}
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97 virtual int64_t nb_frames() const {return nb_frames_;}
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100 struct empty_frame_producer : public frame_producer
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102 virtual safe_ptr<basic_frame> receive(int){return basic_frame::empty();}
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103 virtual safe_ptr<basic_frame> last_frame() const{return basic_frame::empty();}
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104 virtual void set_frame_factory(const safe_ptr<frame_factory>&){}
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105 virtual int64_t nb_frames() const {return 0;}
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106 virtual std::wstring print() const { return L"empty";}
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109 const safe_ptr<frame_producer>& frame_producer::empty() // nothrow
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111 static safe_ptr<frame_producer> producer = make_safe<empty_frame_producer>();
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115 safe_ptr<basic_frame> receive_and_follow(safe_ptr<frame_producer>& producer, int hints)
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117 auto frame = producer->receive(hints);
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118 if(frame == basic_frame::eof())
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120 CASPAR_LOG(info) << producer->print() << " End Of File.";
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121 auto following = producer->get_following_producer();
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122 if(following != frame_producer::empty())
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124 following->set_leading_producer(producer);
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125 producer = std::move(following);
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128 producer = make_safe<last_frame_producer>(producer);
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130 return receive_and_follow(producer, hints);
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135 void register_producer_factory(const producer_factory_t& factory)
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137 g_factories.push_back(factory);
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140 safe_ptr<core::frame_producer> do_create_producer(const safe_ptr<frame_factory>& my_frame_factory, const std::vector<std::wstring>& params)
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143 BOOST_THROW_EXCEPTION(invalid_argument() << arg_name_info("params") << arg_value_info(""));
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145 auto producer = frame_producer::empty();
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146 std::any_of(g_factories.begin(), g_factories.end(), [&](const producer_factory_t& factory) -> bool
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150 producer = factory(my_frame_factory, params);
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154 CASPAR_LOG_CURRENT_EXCEPTION();
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156 return producer != frame_producer::empty();
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159 if(producer == frame_producer::empty())
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160 producer = create_color_producer(my_frame_factory, params);
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166 safe_ptr<core::frame_producer> create_producer(const safe_ptr<frame_factory>& my_frame_factory, const std::vector<std::wstring>& params)
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168 auto producer = do_create_producer(my_frame_factory, params);
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169 auto key_producer = frame_producer::empty();
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171 try // to find a key file.
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173 auto params_copy = params;
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174 if(params_copy.size() > 0)
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176 params_copy[0] += L"_A";
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177 key_producer = do_create_producer(my_frame_factory, params_copy);
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178 if(key_producer == frame_producer::empty())
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180 params_copy[0] += L"LPHA";
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181 key_producer = do_create_producer(my_frame_factory, params_copy);
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187 if(producer != frame_producer::empty() && key_producer != frame_producer::empty())
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188 producer = create_separated_producer(producer, key_producer);
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190 if(producer == frame_producer::empty())
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193 BOOST_FOREACH(auto& param, params)
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194 str += param + L" ";
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195 BOOST_THROW_EXCEPTION(file_not_found() << msg_info("No match found for supplied commands. Check syntax.") << arg_value_info(narrow(str)));
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