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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22 #include "../video_format.h"
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24 #include <common/memory/safe_ptr.h>
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26 #include <boost/noncopyable.hpp>
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28 #include <functional>
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32 static const size_t CONSUMER_BUFFER_DEPTH = 7;
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34 namespace caspar { namespace core {
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37 struct video_format_desc;
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39 struct frame_consumer : boost::noncopyable
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41 virtual ~frame_consumer() {}
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43 virtual void send(const safe_ptr<const read_frame>& frame) = 0;
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44 virtual size_t buffer_depth() const {return 1;}
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45 virtual bool key_only() const{ return false;}
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46 virtual void initialize(const video_format_desc& format_desc) = 0;
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47 virtual std::wstring print() const = 0;
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48 virtual bool has_synchronization_clock() const {return true;}
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49 virtual const core::video_format_desc& get_video_format_desc() const = 0; // nothrow
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51 static const safe_ptr<frame_consumer>& empty()
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53 struct empty_frame_consumer : public frame_consumer
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55 core::video_format_desc format_desc;
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56 virtual void send(const safe_ptr<const read_frame>&){}
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57 virtual size_t buffer_depth() const{return 0;}
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58 virtual void initialize(const video_format_desc&){}
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59 virtual std::wstring print() const {return L"empty";}
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60 virtual bool has_synchronization_clock() const {return false;}
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61 virtual const core::video_format_desc& get_video_format_desc() const{return format_desc;}; // nothrow
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63 static safe_ptr<frame_consumer> consumer = make_safe<empty_frame_consumer>();
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68 typedef std::function<safe_ptr<core::frame_consumer>(const std::vector<std::wstring>&)> consumer_factory_t;
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70 void register_consumer_factory(const consumer_factory_t& factory);
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71 safe_ptr<core::frame_consumer> create_consumer(const std::vector<std::wstring>& params);
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