git.sesse.net Git - casparcg/blob - core/thumbnail_generator.cpp

   1 /*
   2 * Copyright (c) 2011 Sveriges Television AB <info@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: Helge Norberg, helge.norberg@svt.se
  20 */
  21
  22 #include "StdAfx.h"
  23
  24 #include "thumbnail_generator.h"
  25
  26 #include <iostream>
  27 #include <iterator>
  28 #include <set>
  29 #include <future>
  30
  31 #include <boost/thread.hpp>
  32 #include <boost/algorithm/string/predicate.hpp>
  33 #include <boost/filesystem.hpp>
  34
  35 #include <tbb/atomic.h>
  36
  37 #include <common/diagnostics/graph.h>
  38 #include <common/filesystem.h>
  39
  40 #include "producer/frame_producer.h"
  41 #include "producer/cg_proxy.h"
  42 #include "consumer/frame_consumer.h"
  43 #include "mixer/mixer.h"
  44 #include "mixer/image/image_mixer.h"
  45 #include "video_format.h"
  46 #include "frame/frame.h"
  47 #include "frame/draw_frame.h"
  48 #include "frame/frame_transform.h"
  49 #include "frame/audio_channel_layout.h"
  50 #include "producer/media_info/media_info.h"
  51 #include "producer/media_info/media_info_repository.h"
  52
  53 namespace caspar { namespace core {
  54
  55 struct thumbnail_output
  56 {
  57         tbb::atomic<int> sleep_millis;
  58         std::function<void (const_frame)> on_send;
  59
  60         thumbnail_output(int sleep_millis)
  61         {
  62                 this->sleep_millis = sleep_millis;
  63         }
  64
  65         void send(const_frame frame, std::shared_ptr<void> frame_and_ticket)
  66         {
  67                 int current_sleep = sleep_millis;
  68
  69                 if (current_sleep > 0)
  70                         boost::this_thread::sleep_for(boost::chrono::milliseconds(current_sleep));
  71
  72                 on_send(std::move(frame));
  73                 on_send = nullptr;
  74         }
  75 };
  76
  77 struct thumbnail_generator::impl
  78 {
  79 private:
  80         boost::filesystem::path                                                 media_path_;
  81         boost::filesystem::path                                                 thumbnails_path_;
  82         int                                                                                             width_;
  83         int                                                                                             height_;
  84         spl::shared_ptr<image_mixer>                                    image_mixer_;
  85         spl::shared_ptr<diagnostics::graph>                             graph_;
  86         video_format_desc                                                               format_desc_;
  87         spl::unique_ptr<thumbnail_output>                               output_;
  88         mixer                                                                                   mixer_;
  89         thumbnail_creator                                                               thumbnail_creator_;
  90         spl::shared_ptr<media_info_repository>                  media_info_repo_;
  91         spl::shared_ptr<const frame_producer_registry>  producer_registry_;
  92         spl::shared_ptr<const cg_producer_registry>             cg_registry_;
  93         bool                                                                                    mipmap_;
  94         filesystem_monitor::ptr                                                 monitor_;
  95 public:
  96         impl(
  97                         filesystem_monitor_factory& monitor_factory,
  98                         const boost::filesystem::path& media_path,
  99                         const boost::filesystem::path& thumbnails_path,
 100                         int width,
 101                         int height,
 102                         const video_format_desc& render_video_mode,
 103                         std::unique_ptr<image_mixer> image_mixer,
 104                         int generate_delay_millis,
 105                         const thumbnail_creator& thumbnail_creator,
 106                         spl::shared_ptr<media_info_repository> media_info_repo,
 107                         spl::shared_ptr<const frame_producer_registry> producer_registry,
 108                         spl::shared_ptr<const cg_producer_registry> cg_registry,
 109                         bool mipmap)
 110                 : media_path_(media_path)
 111                 , thumbnails_path_(thumbnails_path)
 112                 , width_(width)
 113                 , height_(height)
 114                 , image_mixer_(std::move(image_mixer))
 115                 , format_desc_(render_video_mode)
 116                 , output_(spl::make_unique<thumbnail_output>(generate_delay_millis))
 117                 , mixer_(0, graph_, image_mixer_)
 118                 , thumbnail_creator_(thumbnail_creator)
 119                 , media_info_repo_(std::move(media_info_repo))
 120                 , producer_registry_(std::move(producer_registry))
 121                 , cg_registry_(std::move(cg_registry))
 122                 , mipmap_(mipmap)
 123                 , monitor_(monitor_factory.create(
 124                                 media_path,
 125                                 filesystem_event::ALL,
 126                                 true,
 127                                 [this] (filesystem_event event, const boost::filesystem::path& file)
 128                                 {
 129                                         this->on_file_event(event, file);
 130                                 },
 131                                 [this] (const std::set<boost::filesystem::path>& initial_files)
 132                                 {
 133                                         this->on_initial_files(initial_files);
 134                                 }))
 135         {
 136                 graph_->set_text(L"thumbnail-channel");
 137                 graph_->auto_reset();
 138                 diagnostics::register_graph(graph_);
 139                 //monitor_->initial_scan_completion().get();
 140                 //output_->sleep_millis = 2000;
 141         }
 142
 143         void on_initial_files(const std::set<boost::filesystem::path>& initial_files)
 144         {
 145                 using namespace boost::filesystem;
 146
 147                 std::set<std::wstring> relative_without_extensions;
 148                 boost::transform(
 149                                 initial_files,
 150                                 std::insert_iterator<std::set<std::wstring>>(
 151                                                 relative_without_extensions,
 152                                                 relative_without_extensions.end()),
 153                                 [&](const path& p) { return get_relative_without_extension(p, media_path_).wstring(); });
 154
 155                 for (boost::filesystem::wrecursive_directory_iterator iter(thumbnails_path_); iter != boost::filesystem::wrecursive_directory_iterator(); ++iter)
 156                 {
 157                         auto& path = iter->path();
 158
 159                         if (!is_regular_file(path))
 160                                 continue;
 161
 162                         auto relative_without_extension = get_relative_without_extension(path, thumbnails_path_);
 163                         bool no_corresponding_media_file = relative_without_extensions.find(relative_without_extension.wstring())
 164                                         == relative_without_extensions.end();
 165
 166                         if (no_corresponding_media_file)
 167                                 remove(thumbnails_path_ / (relative_without_extension.wstring() + L".png"));
 168                 }
 169         }
 170
 171         void generate(const std::wstring& media_file)
 172         {
 173                 using namespace boost::filesystem;
 174                 auto base_file = media_path_ / media_file;
 175                 auto folder = base_file.parent_path();
 176
 177                 for (boost::filesystem::directory_iterator iter(folder); iter != boost::filesystem::directory_iterator(); ++iter)
 178                 {
 179                         auto stem = iter->path().stem();
 180
 181                         if (boost::iequals(stem.wstring(), base_file.filename().wstring()))
 182                                 monitor_->reemmit(iter->path());
 183                 }
 184         }
 185
 186         void generate_all()
 187         {
 188                 monitor_->reemmit_all();
 189         }
 190
 191         void on_file_event(filesystem_event event, const boost::filesystem::path& file)
 192         {
 193                 switch (event)
 194                 {
 195                 case filesystem_event::CREATED:
 196                         if (needs_to_be_generated(file))
 197                                 generate_thumbnail(file);
 198
 199                         break;
 200                 case filesystem_event::MODIFIED:
 201                         generate_thumbnail(file);
 202
 203                         break;
 204                 case filesystem_event::REMOVED:
 205                         auto relative_without_extension = get_relative_without_extension(file, media_path_);
 206                         boost::filesystem::remove(thumbnails_path_ / (relative_without_extension.wstring() + L".png"));
 207                         media_info_repo_->remove(file.wstring());
 208
 209                         break;
 210                 }
 211         }
 212
 213         bool needs_to_be_generated(const boost::filesystem::path& file)
 214         {
 215                 using namespace boost::filesystem;
 216
 217                 auto png_file = thumbnails_path_ / (get_relative_without_extension(file, media_path_).wstring() + L".png");
 218
 219                 if (!exists(png_file))
 220                         return true;
 221
 222                 std::time_t media_file_mtime;
 223
 224                 try
 225                 {
 226                         media_file_mtime = last_write_time(file);
 227                 }
 228                 catch (...)
 229                 {
 230                         // Probably removed.
 231                         return false;
 232                 }
 233
 234                 try
 235                 {
 236                         return media_file_mtime != last_write_time(png_file);
 237                 }
 238                 catch (...)
 239                 {
 240                         // thumbnail probably removed.
 241                         return true;
 242                 }
 243         }
 244
 245         void generate_thumbnail(const boost::filesystem::path& file)
 246         {
 247                 auto media_file_with_extension = get_relative(file, media_path_);
 248                 auto media_file = get_relative_without_extension(file, media_path_);
 249                 auto png_file = thumbnails_path_ / (media_file.wstring() + L".png");
 250                 std::promise<void> thumbnail_ready;
 251
 252                 {
 253                         boost::filesystem::create_directories(png_file.parent_path());
 254                         output_->on_send = [this, &png_file] (const_frame frame)
 255                         {
 256                                 thumbnail_creator_(frame, format_desc_, png_file, width_, height_);
 257                         };
 258
 259                         std::map<int, draw_frame> frames;
 260                         auto raw_frame = draw_frame::empty();
 261
 262                         try
 263                         {
 264                                 raw_frame = producer_registry_->create_thumbnail(frame_producer_dependencies(image_mixer_, {}, format_desc_, producer_registry_, cg_registry_), media_file.wstring());
 265                                 media_info_repo_->remove(file.wstring());
 266                                 media_info_repo_->get(file.wstring());
 267                         }
 268                         catch (const boost::thread_interrupted&)
 269                         {
 270                                 throw;
 271                         }
 272                         catch (...)
 273                         {
 274                                 CASPAR_LOG_CURRENT_EXCEPTION_AT_LEVEL(trace);
 275                                 CASPAR_LOG(info) << L"Thumbnail producer failed to create thumbnail for " << media_file_with_extension << L". Turn on log level trace to see more information.";
 276                                 return;
 277                         }
 278
 279                         if (raw_frame == draw_frame::empty()
 280                                         || raw_frame == draw_frame::late())
 281                         {
 282                                 CASPAR_LOG(debug) << L"No thumbnail producer for " << media_file_with_extension;
 283                                 return;
 284                         }
 285
 286                         auto transformed_frame = draw_frame(raw_frame);
 287                         transformed_frame.transform().image_transform.fill_scale[0] = static_cast<double>(width_) / format_desc_.width;
 288                         transformed_frame.transform().image_transform.fill_scale[1] = static_cast<double>(height_) / format_desc_.height;
 289                         transformed_frame.transform().image_transform.use_mipmap = mipmap_;
 290                         frames.insert(std::make_pair(0, transformed_frame));
 291
 292                         std::shared_ptr<void> ticket(nullptr, [&thumbnail_ready](void*) { thumbnail_ready.set_value(); });
 293
 294                         auto mixed_frame = mixer_(std::move(frames), format_desc_, audio_channel_layout(2, L"stereo", L""));
 295
 296                         output_->send(std::move(mixed_frame), ticket);
 297                         ticket.reset();
 298                 }
 299                 thumbnail_ready.get_future().get();
 300
 301                 if (boost::filesystem::exists(png_file))
 302                 {
 303                         // Adjust timestamp to match source file.
 304                         try
 305                         {
 306                                 boost::filesystem::last_write_time(png_file, boost::filesystem::last_write_time(file));
 307                                 CASPAR_LOG(info) << L"Generated thumbnail for " << media_file_with_extension;
 308                         }
 309                         catch (...)
 310                         {
 311                                 // One of the files was removed before the call to last_write_time.
 312                         }
 313                 }
 314                 else
 315                         CASPAR_LOG(debug) << L"No thumbnail generated for " << media_file_with_extension;
 316         }
 317 };
 318
 319 thumbnail_generator::thumbnail_generator(
 320                 filesystem_monitor_factory& monitor_factory,
 321                 const boost::filesystem::path& media_path,
 322                 const boost::filesystem::path& thumbnails_path,
 323                 int width,
 324                 int height,
 325                 const video_format_desc& render_video_mode,
 326                 std::unique_ptr<image_mixer> image_mixer,
 327                 int generate_delay_millis,
 328                 const thumbnail_creator& thumbnail_creator,
 329                 spl::shared_ptr<media_info_repository> media_info_repo,
 330                 spl::shared_ptr<const frame_producer_registry> producer_registry,
 331                 spl::shared_ptr<const cg_producer_registry> cg_registry,
 332                 bool mipmap)
 333                 : impl_(new impl(
 334                                 monitor_factory,
 335                                 media_path,
 336                                 thumbnails_path,
 337                                 width, height,
 338                                 render_video_mode,
 339                                 std::move(image_mixer),
 340                                 generate_delay_millis,
 341                                 thumbnail_creator,
 342                                 media_info_repo,
 343                                 producer_registry,
 344                                 cg_registry,
 345                                 mipmap))
 346 {
 347 }
 348
 349 thumbnail_generator::~thumbnail_generator()
 350 {
 351 }
 352
 353 void thumbnail_generator::generate(const std::wstring& media_file)
 354 {
 355         impl_->generate(media_file);
 356 }
 357
 358 void thumbnail_generator::generate_all()
 359 {
 360         impl_->generate_all();
 361 }
 362
 363 }}