1 #include "../stdafx.h"
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4 #include "frame_producer.h"
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6 #include "../video_format.h"
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8 #include <common/concurrency/executor.h>
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9 #include <common/utility/assert.h>
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10 #include <common/utility/printer.h>
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12 #include <mixer/frame/draw_frame.h>
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13 #include <mixer/image/image_mixer.h>
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14 #include <mixer/audio/audio_mixer.h>
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15 #include <mixer/audio/audio_transform.h>
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17 #include <tbb/spin_mutex.h>
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19 namespace caspar { namespace core {
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21 class frame_producer_remover
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24 tbb::atomic<int> count_;
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26 void do_remove(safe_ptr<frame_producer>& producer)
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28 auto name = producer->print();
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29 producer = frame_producer::empty();
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30 CASPAR_LOG(info) << name << L" Removed.";
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34 frame_producer_remover()
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40 void remove(safe_ptr<frame_producer>&& producer)
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42 CASPAR_VERIFY(producer.unique());
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43 executor_.begin_invoke(std::bind(&frame_producer_remover::do_remove, this, std::move(producer)));
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47 frame_producer_remover g_remover;
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50 struct layer::implementation : boost::noncopyable
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52 mutable tbb::spin_mutex printer_mutex_;
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53 printer parent_printer_;
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56 safe_ptr<frame_producer> foreground_;
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57 safe_ptr<frame_producer> background_;
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58 safe_ptr<draw_frame> last_frame_;
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61 implementation(int index, const printer& parent_printer)
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62 : parent_printer_(parent_printer)
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64 , foreground_(frame_producer::empty())
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65 , background_(frame_producer::empty())
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66 , last_frame_(draw_frame::empty())
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67 , is_paused_(false){}
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69 void load(const safe_ptr<frame_producer>& frame_producer, bool play_on_load, bool preview)
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71 background_ = frame_producer;
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89 background_->set_leading_producer(foreground_);
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90 foreground_ = background_;
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91 CASPAR_LOG(info) << foreground_->print() << L" Added.";
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92 background_ = frame_producer::empty();
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105 last_frame_ = draw_frame::empty();
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106 foreground_ = frame_producer::empty();
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109 safe_ptr<draw_frame> receive()
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113 last_frame_->get_audio_transform().set_gain(0.0);
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114 return last_frame_;
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119 last_frame_ = foreground_->receive();
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120 if(last_frame_ == draw_frame::eof())
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122 CASPAR_VERIFY(foreground_ != frame_producer::empty());
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124 auto following = foreground_->get_following_producer();
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125 following->set_leading_producer(foreground_);
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126 following->set_parent_printer(boost::bind(&implementation::print, this));
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127 g_remover.remove(std::move(foreground_));
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128 foreground_ = following;
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129 CASPAR_LOG(info) << foreground_->print() << L" Added.";
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131 last_frame_ = receive();
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136 CASPAR_LOG(error) << print() << L" Unhandled Exception: ";
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137 CASPAR_LOG_CURRENT_EXCEPTION();
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141 return last_frame_;
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144 std::wstring print() const
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146 tbb::spin_mutex::scoped_lock lock(printer_mutex_); // Child-producers may call print asynchronously to the producer thread.
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147 return (parent_printer_ ? parent_printer_() + L"/" : L"") + L"layer[" + boost::lexical_cast<std::wstring>(index_) + L"]";
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151 layer::layer(int index, const printer& parent_printer) : impl_(new implementation(index, parent_printer)){}
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152 layer::layer(layer&& other) : impl_(std::move(other.impl_)){}
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153 layer& layer::operator=(layer&& other)
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155 impl_ = std::move(other.impl_);
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158 void layer::swap(layer& other)
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160 impl_.swap(other.impl_);
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161 // Printer state is not swapped.
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162 tbb::spin_mutex::scoped_lock lock(impl_->printer_mutex_);
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163 std::swap(impl_->parent_printer_, other.impl_->parent_printer_);
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164 std::swap(impl_->index_, other.impl_->index_);
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166 void layer::load(const safe_ptr<frame_producer>& frame_producer, bool play_on_load, bool preview){return impl_->load(frame_producer, play_on_load, preview);}
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167 void layer::play(){impl_->play();}
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168 void layer::pause(){impl_->pause();}
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169 void layer::stop(){impl_->stop();}
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170 safe_ptr<draw_frame> layer::receive() {return impl_->receive();}
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171 safe_ptr<frame_producer> layer::foreground() const { return impl_->foreground_;}
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172 safe_ptr<frame_producer> layer::background() const { return impl_->background_;}
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173 std::wstring layer::print() const { return impl_->print();}
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