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[casparcg] / core / mixer / mixer.cpp
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 #include "../StdAfx.h"\r
21 \r
22 #include "mixer.h"\r
23 \r
24 #include "read_frame.h"\r
25 #include "write_frame.h"\r
26 \r
27 #include "audio/audio_mixer.h"\r
28 #include "image/image_mixer.h"\r
29 \r
30 #include "../video_channel_context.h"\r
31 \r
32 #include <common/exception/exceptions.h>\r
33 #include <common/concurrency/executor.h>\r
34 #include <common/utility/tweener.h>\r
35 \r
36 #include <core/mixer/read_frame.h>\r
37 #include <core/mixer/write_frame.h>\r
38 #include <core/producer/frame/basic_frame.h>\r
39 #include <core/producer/frame/frame_factory.h>\r
40 #include <core/producer/frame/pixel_format.h>\r
41 #include <core/producer/frame/audio_transform.h>\r
42 #include <core/producer/frame/image_transform.h>\r
43 \r
44 #include <core/video_format.h>\r
45 \r
46 #include <boost/fusion/container/map.hpp>\r
47 #include <boost/fusion/include/at_key.hpp>\r
48 \r
49 #include <tbb/parallel_invoke.h>\r
50 \r
51 #include <unordered_map>\r
52 \r
53 namespace caspar { namespace core {\r
54                 \r
55 template<typename T>\r
56 class tweened_transform\r
57 {\r
58         T source_;\r
59         T dest_;\r
60         int duration_;\r
61         int time_;\r
62         tweener_t tweener_;\r
63 public: \r
64         tweened_transform()\r
65                 : duration_(0)\r
66                 , time_(0)\r
67                 , tweener_(get_tweener(L"linear")){}\r
68         tweened_transform(const T& source, const T& dest, int duration, const std::wstring& tween = L"linear")\r
69                 : source_(source)\r
70                 , dest_(dest)\r
71                 , duration_(duration)\r
72                 , time_(0)\r
73                 , tweener_(get_tweener(tween)){}\r
74         \r
75         T fetch()\r
76         {\r
77                 return time_ == duration_ ? dest_ : tween(static_cast<double>(time_), source_, dest_, static_cast<double>(duration_), tweener_);\r
78         }\r
79 \r
80         T fetch_and_tick(int num)\r
81         {                                               \r
82                 time_ = std::min(time_+num, duration_);\r
83                 return fetch();\r
84         }\r
85 };\r
86 \r
87 struct mixer::implementation : boost::noncopyable\r
88 {               \r
89         video_channel_context& channel_;\r
90         \r
91         audio_mixer     audio_mixer_;\r
92         image_mixer image_mixer_;\r
93         \r
94         typedef std::unordered_map<int, tweened_transform<core::image_transform>> image_transforms;\r
95         typedef std::unordered_map<int, tweened_transform<core::audio_transform>> audio_transforms;\r
96 \r
97         boost::fusion::map<boost::fusion::pair<core::image_transform, image_transforms>,\r
98                                         boost::fusion::pair<core::audio_transform, audio_transforms>> transforms_;\r
99         \r
100 public:\r
101         implementation(video_channel_context& video_channel) \r
102                 : channel_(video_channel)\r
103                 , audio_mixer_(channel_.get_format_desc())\r
104                 , image_mixer_(channel_)\r
105         {       \r
106                 CASPAR_LOG(info) << print() << L" Successfully initialized.";   \r
107         }\r
108                         \r
109         safe_ptr<read_frame> execute(const std::map<int, safe_ptr<core::basic_frame>>& frames)\r
110         {                       \r
111                 try\r
112                 {\r
113                         decltype(mix_image(frames)) image;\r
114                         decltype(mix_audio(frames)) audio;\r
115 \r
116                         tbb::parallel_invoke(\r
117                                         [&]{image = mix_image(frames);}, \r
118                                         [&]{audio = mix_audio(frames);});\r
119                         \r
120                         return make_safe<read_frame>(channel_.ogl(), std::move(image.get()), std::move(audio));\r
121                 }\r
122                 catch(...)\r
123                 {\r
124                         channel_.ogl().gc().wait();\r
125                         image_mixer_ = image_mixer(channel_);\r
126                         audio_mixer_ = audio_mixer(channel_.get_format_desc());\r
127                         channel_.ogl().gc().wait();\r
128 \r
129                         CASPAR_LOG_CURRENT_EXCEPTION();\r
130                         return make_safe<read_frame>();\r
131                 }\r
132         }\r
133                         \r
134         safe_ptr<core::write_frame> create_frame(const void* tag, const core::pixel_format_desc& desc)\r
135         {               \r
136                 return image_mixer_.create_frame(tag, desc);\r
137         }\r
138 \r
139         void reset_transforms()\r
140         {\r
141                 channel_.execution().invoke([&]\r
142                 {\r
143                         boost::fusion::at_key<image_transform>(transforms_).clear();\r
144                         boost::fusion::at_key<audio_transform>(transforms_).clear();\r
145                 });\r
146         }\r
147                 \r
148         template<typename T>\r
149         void set_transform(int index, const T& transform, unsigned int mix_duration, const std::wstring& tween)\r
150         {\r
151                 channel_.execution().invoke([&]\r
152                 {\r
153                         auto& transforms = boost::fusion::at_key<T>(transforms_);\r
154 \r
155                         auto src = transforms[index].fetch();\r
156                         auto dst = transform;\r
157                         transforms[index] = tweened_transform<T>(src, dst, mix_duration, tween);\r
158                 });\r
159         }\r
160                                 \r
161         template<typename T>\r
162         void apply_transform(int index, const std::function<T(T)>& transform, unsigned int mix_duration, const std::wstring& tween)\r
163         {\r
164                 channel_.execution().invoke([&]\r
165                 {\r
166                         auto& transforms = boost::fusion::at_key<T>(transforms_);\r
167 \r
168                         auto src = transforms[index].fetch();\r
169                         auto dst = transform(src);\r
170                         transforms[index] = tweened_transform<T>(src, dst, mix_duration, tween);\r
171                 });\r
172         }\r
173                 \r
174         std::wstring print() const\r
175         {\r
176                 return L"mixer";\r
177         }\r
178 \r
179 private:\r
180                 \r
181         boost::unique_future<safe_ptr<host_buffer>> mix_image(std::map<int, safe_ptr<core::basic_frame>> frames)\r
182         {               \r
183                 auto& image_transforms = boost::fusion::at_key<core::image_transform>(transforms_);\r
184                 \r
185                 BOOST_FOREACH(auto& frame, frames)\r
186                 {\r
187                         image_mixer_.begin_layer();\r
188 \r
189                         auto frame1 = make_safe<core::basic_frame>(frame.second);\r
190                         frame1->get_image_transform() = image_transforms[frame.first].fetch_and_tick(1);\r
191                                                 \r
192                         if(channel_.get_format_desc().mode != core::video_mode::progressive)\r
193                         {\r
194                                 auto frame2 = make_safe<core::basic_frame>(frame.second);\r
195                                 frame2->get_image_transform() = image_transforms[frame.first].fetch_and_tick(1);\r
196                                 if(frame1->get_image_transform() != frame2->get_image_transform())\r
197                                         frame1 = core::basic_frame::interlace(frame1, frame2, channel_.get_format_desc().mode);\r
198                         }\r
199 \r
200                         frame1->accept(image_mixer_);\r
201 \r
202                         image_mixer_.end_layer();\r
203                 }\r
204 \r
205                 return image_mixer_.render();\r
206         }\r
207 \r
208         std::vector<int16_t> mix_audio(const std::map<int, safe_ptr<core::basic_frame>>& frames)\r
209         {\r
210                 auto& audio_transforms = boost::fusion::at_key<core::audio_transform>(transforms_);\r
211 \r
212                 BOOST_FOREACH(auto& frame, frames)\r
213                 {\r
214                         const unsigned int num = channel_.get_format_desc().mode == core::video_mode::progressive ? 1 : 2;\r
215 \r
216                         auto frame1 = make_safe<core::basic_frame>(frame.second);\r
217                         frame1->get_audio_transform() = audio_transforms[frame.first].fetch_and_tick(num);\r
218                         frame1->accept(audio_mixer_);\r
219                 }\r
220 \r
221                 return audio_mixer_.mix();\r
222         }\r
223 };\r
224         \r
225 mixer::mixer(video_channel_context& video_channel) : impl_(new implementation(video_channel)){}\r
226 safe_ptr<core::read_frame> mixer::execute(const std::map<int, safe_ptr<core::basic_frame>>& frames){ return impl_->execute(frames);}\r
227 core::video_format_desc mixer::get_video_format_desc() const { return impl_->channel_.get_format_desc(); }\r
228 safe_ptr<core::write_frame> mixer::create_frame(const void* tag, const core::pixel_format_desc& desc){ return impl_->create_frame(tag, desc); }         \r
229 safe_ptr<core::write_frame> mixer::create_frame(const void* tag, size_t width, size_t height, core::pixel_format::type pix_fmt)\r
230 {\r
231         // Create bgra frame\r
232         core::pixel_format_desc desc;\r
233         desc.pix_fmt = pix_fmt;\r
234         desc.planes.push_back( core::pixel_format_desc::plane(width, height, 4));\r
235         return create_frame(tag, desc);\r
236 }\r
237 void mixer::reset_transforms(){impl_->reset_transforms();}\r
238 void mixer::set_image_transform(int index, const core::image_transform& transform, unsigned int mix_duration, const std::wstring& tween){impl_->set_transform<core::image_transform>(index, transform, mix_duration, tween);}\r
239 void mixer::set_audio_transform(int index, const core::audio_transform& transform, unsigned int mix_duration, const std::wstring& tween){impl_->set_transform<core::audio_transform>(index, transform, mix_duration, tween);}\r
240 void mixer::apply_image_transform(int index, const std::function<core::image_transform(core::image_transform)>& transform, unsigned int mix_duration, const std::wstring& tween){impl_->apply_transform<core::image_transform>(index, transform, mix_duration, tween);}\r
241 void mixer::apply_audio_transform(int index, const std::function<core::audio_transform(core::audio_transform)>& transform, unsigned int mix_duration, const std::wstring& tween){impl_->apply_transform<core::audio_transform>(index, transform, mix_duration, tween);}\r
242 \r
243 }}