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2.0 image_mixer: Refactored, core: Fixed destruction proxy usage.
[casparcg] / core / producer / frame_producer.h
1 /*\r
2 * copyright (c) 2010 Sveriges Television AB <info@casparcg.com>\r
3 *\r
4 *  This file is part of CasparCG.\r
5 *\r
6 *    CasparCG is free software: you can redistribute it and/or modify\r
7 *    it under the terms of the GNU General Public License as published by\r
8 *    the Free Software Foundation, either version 3 of the License, or\r
9 *    (at your option) any later version.\r
10 *\r
11 *    CasparCG is distributed in the hope that it will be useful,\r
12 *    but WITHOUT ANY WARRANTY; without even the implied warranty of\r
13 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
14 *    GNU General Public License for more details.\r
15 \r
16 *    You should have received a copy of the GNU General Public License\r
17 *    along with CasparCG.  If not, see <http://www.gnu.org/licenses/>.\r
18 *\r
19 */\r
20 #pragma once\r
21 \r
22 #include <common/memory/safe_ptr.h>\r
23 \r
24 #include <boost/noncopyable.hpp>\r
25 \r
26 #include <functional>\r
27 #include <string>\r
28 #include <vector>\r
29 #include <stdint.h>\r
30 #include <numeric>\r
31 \r
32 namespace caspar { \r
33         \r
34 class executor;\r
35         \r
36 namespace core {\r
37 \r
38 class basic_frame;\r
39 struct frame_factory;\r
40 \r
41 struct frame_producer : boost::noncopyable\r
42 {\r
43 public:\r
44         enum hints\r
45         {\r
46                 NO_HINT = 0,\r
47                 ALPHA_HINT = 1\r
48         };\r
49 \r
50         virtual ~frame_producer(){}     \r
51 \r
52         virtual std::wstring print() const = 0; // nothrow\r
53 \r
54         virtual void param(const std::wstring&){}\r
55 \r
56         virtual safe_ptr<frame_producer> get_following_producer() const {return frame_producer::empty();}  // nothrow\r
57         virtual void set_leading_producer(const safe_ptr<frame_producer>&) {}  // nothrow\r
58                 \r
59         virtual int64_t nb_frames() const {return std::numeric_limits<int>::max();}\r
60         \r
61         virtual safe_ptr<basic_frame> receive(int hints) = 0;\r
62         virtual safe_ptr<core::basic_frame> last_frame() const = 0;\r
63 \r
64         static const safe_ptr<frame_producer>& empty(); // nothrow\r
65 };\r
66 \r
67 safe_ptr<basic_frame> receive_and_follow(safe_ptr<frame_producer>& producer, int hints);\r
68 \r
69 typedef std::function<safe_ptr<core::frame_producer>(const safe_ptr<frame_factory>&, const std::vector<std::wstring>&)> producer_factory_t;\r
70 void register_producer_factory(const producer_factory_t& factory); // Not thread-safe.\r
71 safe_ptr<core::frame_producer> create_producer(const safe_ptr<frame_factory>&, const std::vector<std::wstring>& params);\r
72 \r
73 safe_ptr<core::frame_producer> create_destroy_producer_proxy(executor& destroy_context, const safe_ptr<frame_producer>& producer);\r
74 \r
75 }}\r