git.sesse.net Git - casparcg/blob - modules/ffmpeg/producer/ffmpeg_producer.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 "ffmpeg_producer.h"\r
  23 \r
  24 #include "input.h"\r
  25 #include "audio/audio_decoder.h"\r
  26 #include "video/video_decoder.h"\r
  27 \r
  28 #include <common/utility/timer.h>\r
  29 #include <common/diagnostics/graph.h>\r
  30 \r
  31 #include <core/producer/frame/basic_frame.h>\r
  32 #include <core/producer/frame/write_frame.h>\r
  33 #include <core/producer/frame/audio_transform.h>\r
  34 #include <core/video_format.h>\r
  35 \r
  36 #include <common/env.h>\r
  37 \r
  38 #include <tbb/parallel_invoke.h>\r
  39 \r
  40 #include <boost/timer.hpp>\r
  41 \r
  42 #include <deque>\r
  43 \r
  44 namespace caspar {\r
  45         \r
  46 struct ffmpeg_producer : public core::frame_producer\r
  47 {\r
  48         const std::wstring                                              filename_;\r
  49         const bool                                                              loop_;\r
  50         \r
  51         std::shared_ptr<diagnostics::graph>             graph_;\r
  52         boost::timer                                                    frame_timer_;\r
  53                 \r
  54         std::deque<safe_ptr<core::write_frame>> video_frame_buffer_;    \r
  55         std::deque<std::vector<short>>                  audio_chunk_buffer_;\r
  56                         \r
  57         std::shared_ptr<core::frame_factory>    frame_factory_;\r
  58 \r
  59         input                                                                   input_; \r
  60         std::unique_ptr<video_decoder>                  video_decoder_;\r
  61         std::unique_ptr<audio_decoder>                  audio_decoder_;\r
  62 public:\r
  63         explicit ffmpeg_producer(const safe_ptr<core::frame_factory>& frame_factory, const std::wstring& filename, bool loop, int start, int length) \r
  64                 : filename_(filename)\r
  65                 , loop_(loop) \r
  66                 , graph_(diagnostics::create_graph(narrow(print())))\r
  67                 , frame_factory_(frame_factory)         \r
  68                 , input_(safe_ptr<diagnostics::graph>(graph_), filename_, loop_, start, length)\r
  69         {\r
  70                 graph_->add_guide("frame-time", 0.5);\r
  71                 graph_->set_color("frame-time",  diagnostics::color(1.0f, 0.0f, 0.0f));\r
  72                 graph_->set_color("underflow", diagnostics::color(0.6f, 0.3f, 0.9f));           \r
  73                 \r
  74                 double frame_time = 1.0f/input_.fps();\r
  75                 double format_frame_time = 1.0/frame_factory->get_video_format_desc().fps;\r
  76                 if(abs(frame_time - format_frame_time) > 0.0001)\r
  77                         CASPAR_LOG(warning) << print() << L" Invalid framerate detected. This may cause distorted audio during playback. frame-time: " << frame_time;\r
  78 \r
  79                 try\r
  80                 {                       \r
  81                         video_decoder_.reset(input_.get_video_codec_context() ? \r
  82                                 new video_decoder(input_.get_video_codec_context().get(), frame_factory) : nullptr);\r
  83                 }\r
  84                 catch(...)\r
  85                 {\r
  86                         CASPAR_LOG_CURRENT_EXCEPTION();\r
  87                         video_decoder_.reset();\r
  88                         CASPAR_LOG(warning) << print() << " removed video-stream.";\r
  89                 }\r
  90                 \r
  91                 try\r
  92                 {                       \r
  93                         audio_decoder_.reset(input_.get_audio_codec_context() ? \r
  94                                 new audio_decoder(input_.get_audio_codec_context().get(), frame_factory->get_video_format_desc()) : nullptr);\r
  95                 }\r
  96                 catch(...)\r
  97                 {\r
  98                         CASPAR_LOG_CURRENT_EXCEPTION();\r
  99                         audio_decoder_.reset();\r
 100                         CASPAR_LOG(warning) << print() << " removed audio-stream.";\r
 101                 }               \r
 102 \r
 103                 if(!video_decoder_ && !audio_decoder_)\r
 104                 {\r
 105                         BOOST_THROW_EXCEPTION(\r
 106                                 caspar_exception() <<\r
 107                                 source_info(narrow(print())) << \r
 108                                 msg_info("Failed to initialize any decoder"));\r
 109                 }\r
 110         }\r
 111 \r
 112         virtual safe_ptr<core::basic_frame> receive()\r
 113         {\r
 114                 frame_timer_.restart();\r
 115 \r
 116                 std::shared_ptr<core::basic_frame> frame;       \r
 117                 for(size_t n = 0; !frame && input_.has_packet() && n < 64; ++n) // 64 packets should be enough. Otherwise there probably was an error and we want to avoid infinite looping.\r
 118                 {       \r
 119                         tbb::parallel_invoke\r
 120                         (\r
 121                                 [&]\r
 122                                 {\r
 123                                         if(video_frame_buffer_.size() < 3)\r
 124                                                 try_decode_video_packet(input_.get_video_packet());\r
 125                                 }, \r
 126                                 [&]\r
 127                                 {\r
 128                                         if(audio_chunk_buffer_.size() < 3)\r
 129                                                 try_decode_audio_packet(input_.get_audio_packet());\r
 130                                 }\r
 131                         );                      \r
 132 \r
 133                         frame = try_merge_audio_and_video();    \r
 134                 }\r
 135                 \r
 136                 graph_->update_value("frame-time", static_cast<float>(frame_timer_.elapsed()*frame_factory_->get_video_format_desc().fps*0.5));\r
 137                                         \r
 138                 if(frame)\r
 139                         return make_safe(frame);\r
 140                 \r
 141                 if(!input_.is_running())\r
 142                         return core::basic_frame::eof();\r
 143 \r
 144                 if(!video_decoder_ && !audio_decoder_)\r
 145                         return core::basic_frame::eof();\r
 146                         \r
 147                 graph_->add_tag("underflow");\r
 148                 return core::basic_frame::late();       \r
 149         }\r
 150 \r
 151         virtual std::wstring print() const\r
 152         {\r
 153                 return L"ffmpeg[" + boost::filesystem::wpath(filename_).filename() + L"]";\r
 154         }\r
 155 \r
 156         void try_decode_video_packet(const packet& video_packet)\r
 157         {\r
 158                 if(!video_decoder_) // Video Decoding.\r
 159                         return;\r
 160 \r
 161                 try\r
 162                 {\r
 163                         auto frames = video_decoder_->execute(this, video_packet);\r
 164                         video_frame_buffer_.insert(video_frame_buffer_.end(), frames.begin(), frames.end());\r
 165                 }\r
 166                 catch(...)\r
 167                 {\r
 168                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 169                         video_decoder_.reset();\r
 170                         CASPAR_LOG(warning) << print() << " removed video-stream.";\r
 171                 }\r
 172         }\r
 173 \r
 174         void try_decode_audio_packet(const packet& audio_packet)\r
 175         {\r
 176                 if(!audio_decoder_) // Audio Decoding.\r
 177                         return;\r
 178 \r
 179                 try\r
 180                 {\r
 181                         auto chunks = audio_decoder_->execute(audio_packet);\r
 182                         audio_chunk_buffer_.insert(audio_chunk_buffer_.end(), chunks.begin(), chunks.end());\r
 183                 }\r
 184                 catch(...)\r
 185                 {\r
 186                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 187                         audio_decoder_.reset();\r
 188                         CASPAR_LOG(warning) << print() << " removed audio-stream.";\r
 189                 }\r
 190         }\r
 191 \r
 192         std::shared_ptr<core::basic_frame> try_merge_audio_and_video()\r
 193         {               \r
 194                 std::shared_ptr<core::write_frame> frame;       \r
 195 \r
 196                 if(!video_frame_buffer_.empty() && !audio_chunk_buffer_.empty())\r
 197                 {\r
 198                         frame = video_frame_buffer_.front();                            \r
 199                         video_frame_buffer_.pop_front();\r
 200                                 \r
 201                         frame->audio_data() = std::move(audio_chunk_buffer_.front());\r
 202                         audio_chunk_buffer_.pop_front();        \r
 203                 }\r
 204                 else if(!video_frame_buffer_.empty() && !audio_decoder_)\r
 205                 {\r
 206                         frame = video_frame_buffer_.front();                            \r
 207                         video_frame_buffer_.pop_front();\r
 208                         frame->get_audio_transform().set_has_audio(false);      \r
 209                 }\r
 210                 else if(!audio_chunk_buffer_.empty() && !video_decoder_)\r
 211                 {\r
 212                         frame = frame_factory_->create_frame(this, 1, 1);\r
 213                         std::fill(frame->image_data().begin(), frame->image_data().end(), 0);\r
 214                                 \r
 215                         frame->audio_data() = std::move(audio_chunk_buffer_.front());\r
 216                         audio_chunk_buffer_.pop_front();\r
 217                 }\r
 218                 \r
 219                 return frame;   \r
 220         }\r
 221 };\r
 222 \r
 223 safe_ptr<core::frame_producer> create_ffmpeg_producer(const safe_ptr<core::frame_factory>& frame_factory, const std::vector<std::wstring>& params)\r
 224 {               \r
 225         static const std::vector<std::wstring> extensions = boost::assign::list_of\r
 226                 (L"mpg")(L"mpeg")(L"avi")(L"mov")(L"qt")(L"webm")(L"dv")(L"mp4")(L"f4v")(L"flv")(L"mkv")(L"mka")(L"wmv")(L"wma")(L"ogg")(L"divx")(L"xvid")(L"wav")(L"mp3")(L"m2v");\r
 227         std::wstring filename = env::media_folder() + L"\\" + params[0];\r
 228         \r
 229         auto ext = std::find_if(extensions.begin(), extensions.end(), [&](const std::wstring& ex) -> bool\r
 230                 {                                       \r
 231                         return boost::filesystem::is_regular_file(boost::filesystem::wpath(filename).replace_extension(ex));\r
 232                 });\r
 233 \r
 234         if(ext == extensions.end())\r
 235                 return core::frame_producer::empty();\r
 236 \r
 237         std::wstring path = filename + L"." + *ext;\r
 238         bool loop = std::find(params.begin(), params.end(), L"LOOP") != params.end();\r
 239 \r
 240         static const boost::wregex expr(L"\\((?<START>\\d+)(,(?<LENGTH>\\d+)?)?\\)");//(,(?<END>\\d+))?\\]"); // boost::regex has no repeated captures?\r
 241         boost::wsmatch what;\r
 242         auto it = std::find_if(params.begin(), params.end(), [&](const std::wstring& str)\r
 243         {\r
 244                 return boost::regex_match(str, what, expr);\r
 245         });\r
 246 \r
 247         int start = -1;\r
 248         int length = -1;\r
 249 \r
 250         if(it != params.end())\r
 251         {\r
 252                 start = lexical_cast_or_default(what["START"].str(), -1);\r
 253                 if(what["LENGTH"].matched)\r
 254                         length = lexical_cast_or_default(what["LENGTH"].str(), -1);\r
 255         }\r
 256         \r
 257         return make_safe<ffmpeg_producer>(frame_factory, path, loop, start, length);\r
 258 }\r
 259 \r
 260 }