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