git.sesse.net Git - casparcg/blob - modules/reroute/producer/channel_producer.cpp

   1 /*
   2 * Copyright 2013 Sveriges Television AB http://casparcg.com/
   3 *
   4 * This file is part of CasparCG (www.casparcg.com).
   5 *
   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.
  10 *
  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.
  15 *
  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/>.
  18 *
  19 * Author: Robert Nagy, ronag89@gmail.com
  20 */
  21
  22 #include "../stdafx.h"
  23
  24 #include "channel_producer.h"
  25
  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>
  31
  32 #include <core/frame/frame.h>
  33 #include <core/frame/pixel_format.h>
  34 #include <core/frame/audio_channel_layout.h>
  35 #include <core/frame/draw_frame.h>
  36 #include <core/frame/frame_factory.h>
  37 #include <core/video_format.h>
  38
  39 #include <boost/thread/once.hpp>
  40 #include <boost/lexical_cast.hpp>
  41 #include <boost/property_tree/ptree.hpp>
  42 #include <boost/range/algorithm/copy.hpp>
  43
  44 #include <common/except.h>
  45 #include <common/memory.h>
  46 #include <common/future.h>
  47 #include <common/memcpy.h>
  48
  49 #include <tbb/concurrent_queue.h>
  50
  51 #include <asmlib.h>
  52
  53 #include <queue>
  54
  55 namespace caspar { namespace reroute {
  56
  57 class channel_consumer : public core::frame_consumer
  58 {
  59         core::monitor::subject                                                          monitor_subject_;
  60         tbb::concurrent_bounded_queue<core::const_frame>        frame_buffer_;
  61         core::video_format_desc                                                         format_desc_;
  62         core::audio_channel_layout                                                      channel_layout_                 = core::audio_channel_layout::invalid();
  63         int                                                                                                     channel_index_;
  64         int                                                                                                     consumer_index_;
  65         tbb::atomic<bool>                                                                       is_running_;
  66         tbb::atomic<int64_t>                                                            current_age_;
  67         std::promise<void>                                                                      first_frame_promise_;
  68         std::future<void>                                                                       first_frame_available_;
  69         bool                                                                                            first_frame_reported_;
  70
  71 public:
  72         channel_consumer()
  73                 : consumer_index_(next_consumer_index())
  74                 , first_frame_available_(first_frame_promise_.get_future())
  75                 , first_frame_reported_(false)
  76         {
  77                 is_running_ = true;
  78                 current_age_ = 0;
  79                 frame_buffer_.set_capacity(3);
  80         }
  81
  82         static int next_consumer_index()
  83         {
  84                 static tbb::atomic<int> consumer_index_counter;
  85                 static boost::once_flag consumer_index_counter_initialized;
  86
  87                 boost::call_once(consumer_index_counter_initialized, [&]()
  88                 {
  89                         consumer_index_counter = 0;
  90                 });
  91
  92                 return ++consumer_index_counter;
  93         }
  94
  95         ~channel_consumer()
  96         {
  97         }
  98
  99         // frame_consumer
 100
 101         std::future<bool> send(core::const_frame frame) override
 102         {
 103                 bool pushed = frame_buffer_.try_push(frame);
 104
 105                 if (pushed && !first_frame_reported_)
 106                 {
 107                         first_frame_promise_.set_value();
 108                         first_frame_reported_ = true;
 109                 }
 110
 111                 return make_ready_future(is_running_.load());
 112         }
 113
 114         void initialize(
 115                         const core::video_format_desc& format_desc,
 116                         const core::audio_channel_layout& channel_layout,
 117                         int channel_index) override
 118         {
 119                 format_desc_    = format_desc;
 120                 channel_layout_ = channel_layout;
 121                 channel_index_  = channel_index;
 122         }
 123
 124         std::wstring name() const override
 125         {
 126                 return L"channel-consumer";
 127         }
 128
 129         int64_t presentation_frame_age_millis() const override
 130         {
 131                 return current_age_;
 132         }
 133
 134         std::wstring print() const override
 135         {
 136                 return L"[channel-consumer|" + boost::lexical_cast<std::wstring>(channel_index_) + L"]";
 137         }
 138
 139         boost::property_tree::wptree info() const override
 140         {
 141                 boost::property_tree::wptree info;
 142                 info.add(L"type", L"channel-consumer");
 143                 info.add(L"channel-index", channel_index_);
 144                 return info;
 145         }
 146
 147         bool has_synchronization_clock() const override
 148         {
 149                 return false;
 150         }
 151
 152         int buffer_depth() const override
 153         {
 154                 return -1;
 155         }
 156
 157         int index() const override
 158         {
 159                 return 78500 + consumer_index_;
 160         }
 161
 162         core::monitor::subject& monitor_output() override
 163         {
 164                 return monitor_subject_;
 165         }
 166
 167         // channel_consumer
 168
 169         const core::video_format_desc& get_video_format_desc()
 170         {
 171                 return format_desc_;
 172         }
 173
 174         const core::audio_channel_layout& get_audio_channel_layout()
 175         {
 176                 return channel_layout_;
 177         }
 178
 179         void block_until_first_frame_available()
 180         {
 181                 if (first_frame_available_.wait_for(std::chrono::seconds(2)) == std::future_status::timeout)
 182                         CASPAR_LOG(warning)
 183                                         << print() << L" Timed out while waiting for first frame";
 184         }
 185
 186         core::const_frame receive()
 187         {
 188                 core::const_frame frame = core::const_frame::empty();
 189
 190                 if (!is_running_)
 191                         return frame;
 192
 193                 if (frame_buffer_.try_pop(frame))
 194                         current_age_ = frame.get_age_millis();
 195
 196                 return frame;
 197         }
 198
 199         void stop()
 200         {
 201                 is_running_ = false;
 202         }
 203 };
 204
 205 class channel_producer : public core::frame_producer_base
 206 {
 207         core::monitor::subject                                          monitor_subject_;
 208
 209         const spl::shared_ptr<core::frame_factory>      frame_factory_;
 210         const core::video_format_desc                           output_format_desc_;
 211         const spl::shared_ptr<channel_consumer>         consumer_;
 212         core::constraints                                                       pixel_constraints_;
 213
 214         std::queue<core::draw_frame>                            frame_buffer_;
 215         uint64_t                                                                        frame_number_;
 216
 217 public:
 218         explicit channel_producer(const core::frame_producer_dependencies& dependecies, const spl::shared_ptr<core::video_channel>& channel)
 219                 : frame_factory_(dependecies.frame_factory)
 220                 , output_format_desc_(dependecies.format_desc)
 221                 , frame_number_(0)
 222         {
 223                 pixel_constraints_.width.set(output_format_desc_.width);
 224                 pixel_constraints_.height.set(output_format_desc_.height);
 225                 channel->output().add(consumer_);
 226                 consumer_->block_until_first_frame_available();
 227                 CASPAR_LOG(info) << print() << L" Initialized";
 228         }
 229
 230         ~channel_producer()
 231         {
 232                 consumer_->stop();
 233                 CASPAR_LOG(info) << print() << L" Uninitialized";
 234         }
 235
 236         // frame_producer
 237
 238         core::draw_frame receive_impl() override
 239         {
 240                 auto format_desc = consumer_->get_video_format_desc();
 241
 242                 if(frame_buffer_.size() > 0)
 243                 {
 244                         auto frame = frame_buffer_.front();
 245                         frame_buffer_.pop();
 246                         return frame;
 247                 }
 248
 249                 auto read_frame = consumer_->receive();
 250                 if(read_frame == core::const_frame::empty() || read_frame.image_data().empty())
 251                         return core::draw_frame::late();
 252
 253                 frame_number_++;
 254
 255                 bool double_speed       = std::abs(output_format_desc_.fps / 2.0 - format_desc.fps) < 0.01;
 256                 bool half_speed         = std::abs(format_desc.fps / 2.0 - output_format_desc_.fps) < 0.01;
 257
 258                 if(half_speed && frame_number_ % 2 == 0) // Skip frame
 259                         return receive_impl();
 260
 261                 core::pixel_format_desc desc;
 262                 desc.format = core::pixel_format::bgra;
 263                 desc.planes.push_back(core::pixel_format_desc::plane(format_desc.width, format_desc.height, 4));
 264                 auto frame = frame_factory_->create_frame(this, desc, consumer_->get_audio_channel_layout());
 265
 266                 bool copy_audio = !double_speed && !half_speed;
 267
 268                 if (copy_audio)
 269                 {
 270                         frame.audio_data().reserve(read_frame.audio_data().size());
 271                         boost::copy(read_frame.audio_data(), std::back_inserter(frame.audio_data()));
 272                 }
 273
 274                 fast_memcpy(frame.image_data().begin(), read_frame.image_data().begin(), read_frame.image_data().size());
 275
 276                 frame_buffer_.push(core::draw_frame(std::move(frame)));
 277
 278                 if(double_speed)
 279                         frame_buffer_.push(frame_buffer_.back());
 280
 281                 return receive_impl();
 282         }
 283
 284         std::wstring name() const override
 285         {
 286                 return L"channel-producer";
 287         }
 288
 289         std::wstring print() const override
 290         {
 291                 return L"channel-producer[]";
 292         }
 293
 294         core::constraints& pixel_constraints() override
 295         {
 296                 return pixel_constraints_;
 297         }
 298
 299         boost::property_tree::wptree info() const override
 300         {
 301                 boost::property_tree::wptree info;
 302                 info.add(L"type", L"channel-producer");
 303                 return info;
 304         }
 305
 306         core::monitor::subject& monitor_output() override
 307         {
 308                 return monitor_subject_;
 309         }
 310 };
 311
 312 spl::shared_ptr<core::frame_producer> create_channel_producer(
 313                 const core::frame_producer_dependencies& dependencies,
 314                 const spl::shared_ptr<core::video_channel>& channel)
 315 {
 316         return spl::make_shared<channel_producer>(dependencies, channel);
 317 }
 318
 319 }}