2 * Copyright 2013 Sveriges Television AB http://casparcg.com/
4 * This file is part of CasparCG (www.casparcg.com).
6 * CasparCG is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * CasparCG is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with CasparCG. If not, see <http://www.gnu.org/licenses/>.
19 * Author: Robert Nagy, ronag89@gmail.com
22 #include "../stdafx.h"
24 #include "channel_producer.h"
26 #include <core/monitor/monitor.h>
27 #include <core/consumer/frame_consumer.h>
28 #include <core/consumer/output.h>
29 #include <core/producer/frame_producer.h>
30 #include <core/video_channel.h>
32 #include <core/frame/frame.h>
33 #include <core/frame/pixel_format.h>
34 #include <core/frame/draw_frame.h>
35 #include <core/frame/frame_factory.h>
36 #include <core/video_format.h>
38 #include <boost/thread/once.hpp>
39 #include <boost/lexical_cast.hpp>
40 #include <boost/property_tree/ptree.hpp>
41 #include <boost/range/algorithm/copy.hpp>
43 #include <common/except.h>
44 #include <common/memory.h>
45 #include <common/future.h>
47 #include <tbb/concurrent_queue.h>
53 namespace caspar { namespace reroute {
55 class channel_consumer : public core::frame_consumer
57 core::monitor::subject monitor_subject_;
58 tbb::concurrent_bounded_queue<core::const_frame> frame_buffer_;
59 core::video_format_desc format_desc_;
62 tbb::atomic<bool> is_running_;
63 tbb::atomic<int64_t> current_age_;
64 std::promise<void> first_frame_promise_;
65 std::future<void> first_frame_available_;
66 bool first_frame_reported_;
70 : consumer_index_(next_consumer_index())
71 , first_frame_available_(first_frame_promise_.get_future())
72 , first_frame_reported_(false)
76 frame_buffer_.set_capacity(3);
79 static int next_consumer_index()
81 static tbb::atomic<int> consumer_index_counter;
82 static boost::once_flag consumer_index_counter_initialized;
84 boost::call_once(consumer_index_counter_initialized, [&]()
86 consumer_index_counter = 0;
89 return ++consumer_index_counter;
98 std::future<bool> send(core::const_frame frame) override
100 bool pushed = frame_buffer_.try_push(frame);
102 if (pushed && !first_frame_reported_)
104 first_frame_promise_.set_value();
105 first_frame_reported_ = true;
108 return make_ready_future(is_running_.load());
112 const core::video_format_desc& format_desc,
113 int channel_index) override
115 format_desc_ = format_desc;
116 channel_index_ = channel_index;
119 std::wstring name() const override
121 return L"channel-consumer";
124 int64_t presentation_frame_age_millis() const override
129 std::wstring print() const override
131 return L"[channel-consumer|" + boost::lexical_cast<std::wstring>(channel_index_) + L"]";
134 boost::property_tree::wptree info() const override
136 boost::property_tree::wptree info;
137 info.add(L"type", L"channel-consumer");
138 info.add(L"channel-index", channel_index_);
142 bool has_synchronization_clock() const override
147 int buffer_depth() const override
152 int index() const override
154 return 78500 + consumer_index_;
157 core::monitor::subject& monitor_output() override
159 return monitor_subject_;
164 const core::video_format_desc& get_video_format_desc()
169 void block_until_first_frame_available()
171 if (first_frame_available_.wait_for(std::chrono::seconds(2)) == std::future_status::timeout)
173 << print() << L" Timed out while waiting for first frame";
176 core::const_frame receive()
178 core::const_frame frame = core::const_frame::empty();
183 if (frame_buffer_.try_pop(frame))
184 current_age_ = frame.get_age_millis();
195 class channel_producer : public core::frame_producer_base
197 core::monitor::subject monitor_subject_;
199 const spl::shared_ptr<core::frame_factory> frame_factory_;
200 const core::video_format_desc output_format_desc_;
201 const spl::shared_ptr<channel_consumer> consumer_;
202 core::constraints pixel_constraints_;
204 std::queue<core::draw_frame> frame_buffer_;
205 uint64_t frame_number_;
208 explicit channel_producer(const core::frame_producer_dependencies& dependecies, const spl::shared_ptr<core::video_channel>& channel)
209 : frame_factory_(dependecies.frame_factory)
210 , output_format_desc_(dependecies.format_desc)
213 pixel_constraints_.width.set(output_format_desc_.width);
214 pixel_constraints_.height.set(output_format_desc_.height);
215 channel->output().add(consumer_);
216 consumer_->block_until_first_frame_available();
217 CASPAR_LOG(info) << print() << L" Initialized";
223 CASPAR_LOG(info) << print() << L" Uninitialized";
228 core::draw_frame receive_impl() override
230 auto format_desc = consumer_->get_video_format_desc();
232 if(frame_buffer_.size() > 0)
234 auto frame = frame_buffer_.front();
239 auto read_frame = consumer_->receive();
240 if(read_frame == core::const_frame::empty() || read_frame.image_data().empty())
241 return core::draw_frame::late();
245 bool double_speed = std::abs(output_format_desc_.fps / 2.0 - format_desc.fps) < 0.01;
246 bool half_speed = std::abs(format_desc.fps / 2.0 - output_format_desc_.fps) < 0.01;
248 if(half_speed && frame_number_ % 2 == 0) // Skip frame
249 return receive_impl();
251 core::pixel_format_desc desc;
252 desc.format = core::pixel_format::bgra;
253 desc.planes.push_back(core::pixel_format_desc::plane(format_desc.width, format_desc.height, 4));
254 auto frame = frame_factory_->create_frame(this, desc);
256 bool copy_audio = !double_speed && !half_speed;
260 frame.audio_data().reserve(read_frame.audio_data().size());
261 boost::copy(read_frame.audio_data(), std::back_inserter(frame.audio_data()));
264 A_memcpy(frame.image_data().begin(), read_frame.image_data().begin(), read_frame.image_data().size());
266 frame_buffer_.push(core::draw_frame(std::move(frame)));
269 frame_buffer_.push(frame_buffer_.back());
271 return receive_impl();
274 std::wstring name() const override
276 return L"channel-producer";
279 std::wstring print() const override
281 return L"channel-producer[]";
284 core::constraints& pixel_constraints() override
286 return pixel_constraints_;
289 boost::property_tree::wptree info() const override
291 boost::property_tree::wptree info;
292 info.add(L"type", L"channel-producer");
296 core::monitor::subject& monitor_output() override
298 return monitor_subject_;
302 spl::shared_ptr<core::frame_producer> create_channel_producer(
303 const core::frame_producer_dependencies& dependencies,
304 const spl::shared_ptr<core::video_channel>& channel)
306 return spl::make_shared<channel_producer>(dependencies, channel);