2 * Copyright (c) 2011 Sveriges Television AB <info@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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24 #include "frame_consumer.h"
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26 #include <common/except.h>
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28 #include <core/video_format.h>
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29 #include <core/frame/frame.h>
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31 #include <boost/thread.hpp>
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33 namespace caspar { namespace core {
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35 std::vector<const consumer_factory_t> g_factories;
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37 void register_consumer_factory(const consumer_factory_t& factory)
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39 g_factories.push_back(factory);
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42 class destroy_consumer_proxy : public frame_consumer
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44 std::shared_ptr<frame_consumer> consumer_;
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46 destroy_consumer_proxy(spl::shared_ptr<frame_consumer>&& consumer)
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47 : consumer_(std::move(consumer))
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51 ~destroy_consumer_proxy()
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53 static tbb::atomic<int> counter = tbb::atomic<int>();
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56 CASPAR_VERIFY(counter < 8);
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58 auto consumer = new std::shared_ptr<frame_consumer>(std::move(consumer_));
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61 std::unique_ptr<std::shared_ptr<frame_consumer>> pointer_guard(consumer);
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63 auto str = (*consumer)->print();
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66 if(!consumer->unique())
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67 CASPAR_LOG(trace) << str << L" Not destroyed on asynchronous destruction thread: " << consumer->use_count();
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69 CASPAR_LOG(trace) << str << L" Destroying on asynchronous destruction thread.";
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73 pointer_guard.reset();
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79 bool send(const_frame frame) override {return consumer_->send(std::move(frame));}
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80 virtual void initialize(const struct video_format_desc& format_desc, int channel_index) override {return consumer_->initialize(format_desc, channel_index);}
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81 std::wstring print() const override {return consumer_->print();}
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82 std::wstring name() const override {return consumer_->name();}
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83 boost::property_tree::wptree info() const override {return consumer_->info();}
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84 bool has_synchronization_clock() const override {return consumer_->has_synchronization_clock();}
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85 int buffer_depth() const override {return consumer_->buffer_depth();}
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86 int index() const override {return consumer_->index();}
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87 void subscribe(const monitor::observable::observer_ptr& o) override {consumer_->subscribe(o);}
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88 void unsubscribe(const monitor::observable::observer_ptr& o) override {consumer_->unsubscribe(o);}
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91 class print_consumer_proxy : public frame_consumer
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93 std::shared_ptr<frame_consumer> consumer_;
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95 print_consumer_proxy(spl::shared_ptr<frame_consumer>&& consumer)
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96 : consumer_(std::move(consumer))
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98 CASPAR_LOG(info) << consumer_->print() << L" Initialized.";
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101 ~print_consumer_proxy()
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103 auto str = consumer_->print();
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104 CASPAR_LOG(trace) << str << L" Uninitializing.";
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106 CASPAR_LOG(info) << str << L" Uninitialized.";
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109 bool send(const_frame frame) override {return consumer_->send(std::move(frame));}
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110 virtual void initialize(const struct video_format_desc& format_desc, int channel_index) override {return consumer_->initialize(format_desc, channel_index);}
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111 std::wstring print() const override {return consumer_->print();}
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112 std::wstring name() const override {return consumer_->name();}
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113 boost::property_tree::wptree info() const override {return consumer_->info();}
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114 bool has_synchronization_clock() const override {return consumer_->has_synchronization_clock();}
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115 int buffer_depth() const override {return consumer_->buffer_depth();}
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116 int index() const override {return consumer_->index();}
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117 void subscribe(const monitor::observable::observer_ptr& o) override {consumer_->subscribe(o);}
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118 void unsubscribe(const monitor::observable::observer_ptr& o) override {consumer_->unsubscribe(o);}
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121 class recover_consumer_proxy : public frame_consumer
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123 std::shared_ptr<frame_consumer> consumer_;
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124 int channel_index_;
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125 video_format_desc format_desc_;
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127 recover_consumer_proxy(spl::shared_ptr<frame_consumer>&& consumer)
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128 : consumer_(std::move(consumer))
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132 virtual bool send(const_frame frame)
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136 return consumer_->send(frame);
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140 CASPAR_LOG_CURRENT_EXCEPTION();
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143 consumer_->initialize(format_desc_, channel_index_);
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144 return consumer_->send(frame);
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148 CASPAR_LOG_CURRENT_EXCEPTION();
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149 CASPAR_LOG(error) << print() << " Failed to recover consumer.";
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155 virtual void initialize(const struct video_format_desc& format_desc, int channel_index)
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157 format_desc_ = format_desc;
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158 channel_index_ = channel_index;
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159 return consumer_->initialize(format_desc, channel_index);
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162 std::wstring print() const override {return consumer_->print();}
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163 std::wstring name() const override {return consumer_->name();}
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164 boost::property_tree::wptree info() const override {return consumer_->info();}
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165 bool has_synchronization_clock() const override {return consumer_->has_synchronization_clock();}
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166 int buffer_depth() const override {return consumer_->buffer_depth();}
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167 int index() const override {return consumer_->index();}
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168 void subscribe(const monitor::observable::observer_ptr& o) override {consumer_->subscribe(o);}
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169 void unsubscribe(const monitor::observable::observer_ptr& o) override {consumer_->unsubscribe(o);}
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172 // This class is used to guarantee that audio cadence is correct. This is important for NTSC audio.
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173 class cadence_guard : public frame_consumer
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175 spl::shared_ptr<frame_consumer> consumer_;
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176 std::vector<int> audio_cadence_;
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177 boost::circular_buffer<std::size_t> sync_buffer_;
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179 cadence_guard(const spl::shared_ptr<frame_consumer>& consumer)
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180 : consumer_(consumer)
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184 void initialize(const video_format_desc& format_desc, int channel_index) override
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186 audio_cadence_ = format_desc.audio_cadence;
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187 sync_buffer_ = boost::circular_buffer<std::size_t>(format_desc.audio_cadence.size());
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188 consumer_->initialize(format_desc, channel_index);
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191 bool send(const_frame frame) override
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193 if(audio_cadence_.size() == 1)
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194 return consumer_->send(frame);
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196 bool result = true;
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198 if(boost::range::equal(sync_buffer_, audio_cadence_) && audio_cadence_.front() == static_cast<int>(frame.audio_data().size()))
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200 // Audio sent so far is in sync, now we can send the next chunk.
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201 result = consumer_->send(frame);
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202 boost::range::rotate(audio_cadence_, std::begin(audio_cadence_)+1);
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205 CASPAR_LOG(trace) << print() << L" Syncing audio.";
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207 sync_buffer_.push_back(static_cast<int>(frame.audio_data().size()));
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212 std::wstring print() const override {return consumer_->print();}
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213 std::wstring name() const override {return consumer_->name();}
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214 boost::property_tree::wptree info() const override {return consumer_->info();}
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215 bool has_synchronization_clock() const override {return consumer_->has_synchronization_clock();}
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216 int buffer_depth() const override {return consumer_->buffer_depth();}
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217 int index() const override {return consumer_->index();}
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218 void subscribe(const monitor::observable::observer_ptr& o) override {consumer_->subscribe(o);}
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219 void unsubscribe(const monitor::observable::observer_ptr& o) override {consumer_->unsubscribe(o);}
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222 spl::shared_ptr<core::frame_consumer> create_consumer(const std::vector<std::wstring>& params)
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225 CASPAR_THROW_EXCEPTION(invalid_argument() << arg_name_info("params") << arg_value_info(""));
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227 auto consumer = frame_consumer::empty();
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228 std::any_of(g_factories.begin(), g_factories.end(), [&](const consumer_factory_t& factory) -> bool
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232 consumer = factory(params);
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236 CASPAR_LOG_CURRENT_EXCEPTION();
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238 return consumer != frame_consumer::empty();
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241 if(consumer == frame_consumer::empty())
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242 CASPAR_THROW_EXCEPTION(file_not_found() << msg_info("No match found for supplied commands. Check syntax."));
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244 return spl::make_shared<destroy_consumer_proxy>(
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245 spl::make_shared<print_consumer_proxy>(
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246 spl::make_shared<recover_consumer_proxy>(
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247 spl::make_shared<cadence_guard>(
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248 std::move(consumer)))));
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251 const spl::shared_ptr<frame_consumer>& frame_consumer::empty()
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253 class empty_frame_consumer : public frame_consumer
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256 bool send(const_frame) override {return false;}
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257 void initialize(const video_format_desc&, int) override{}
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258 std::wstring print() const override {return L"empty";}
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259 std::wstring name() const override {return L"empty";}
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260 bool has_synchronization_clock() const override {return false;}
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261 int buffer_depth() const override {return 0;};
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262 virtual int index() const{return -1;}
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263 void subscribe(const monitor::observable::observer_ptr& o) override{}
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264 void unsubscribe(const monitor::observable::observer_ptr& o) override{}
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265 boost::property_tree::wptree info() const override
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267 boost::property_tree::wptree info;
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268 info.add(L"type", L"empty");
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272 static spl::shared_ptr<frame_consumer> consumer = spl::make_shared<empty_frame_consumer>();
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