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/mixer/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 #include <boost/range/algorithm.hpp>\r
  42 #include <boost/range/algorithm_ext.hpp>\r
  43 \r
  44 #include <deque>\r
  45 \r
  46 namespace caspar {\r
  47         \r
  48 struct ffmpeg_producer : public core::frame_producer\r
  49 {\r
  50         static const size_t                                             DECODED_PACKET_BUFFER_SIZE = 4;\r
  51         static const size_t                                             MAX_PACKET_OFFSET = 64; // Avoid infinite looping.\r
  52 \r
  53         const std::wstring                                              filename_;\r
  54         const bool                                                              loop_;\r
  55         \r
  56         const safe_ptr<diagnostics::graph>              graph_;\r
  57         boost::timer                                                    frame_timer_;\r
  58                 \r
  59         std::deque<safe_ptr<core::write_frame>> video_frame_buffer_;    \r
  60         std::deque<std::vector<short>>                  audio_chunk_buffer_;\r
  61                         \r
  62         const safe_ptr<core::frame_factory>             frame_factory_;\r
  63 \r
  64         input                                                                   input_; \r
  65         std::unique_ptr<video_decoder>                  video_decoder_;\r
  66         std::unique_ptr<audio_decoder>                  audio_decoder_;\r
  67 public:\r
  68         explicit ffmpeg_producer(const safe_ptr<core::frame_factory>& frame_factory, const std::wstring& filename, bool loop, int start, int length) \r
  69                 : filename_(filename)\r
  70                 , loop_(loop) \r
  71                 , graph_(diagnostics::create_graph(narrow(print())))\r
  72                 , frame_factory_(frame_factory)         \r
  73                 , input_(safe_ptr<diagnostics::graph>(graph_), filename_, loop_, start, length)\r
  74         {\r
  75                 graph_->add_guide("frame-time", 0.5);\r
  76                 graph_->set_color("frame-time",  diagnostics::color(1.0f, 0.0f, 0.0f));\r
  77                 graph_->set_color("underflow", diagnostics::color(0.6f, 0.3f, 0.9f));           \r
  78                 \r
  79                 double frame_time = 1.0f/input_.fps();\r
  80                 double format_frame_time = 1.0/frame_factory->get_video_format_desc().fps;\r
  81                 if(abs(frame_time - format_frame_time) > 0.0001 && abs(frame_time - format_frame_time/2) > 0.0001)\r
  82                         CASPAR_LOG(warning) << print() << L" Invalid framerate detected. This may cause distorted audio during playback. frame-time: " << frame_time;\r
  83 \r
  84                 try\r
  85                 {                       \r
  86                         video_decoder_.reset(input_.get_video_codec_context() ? \r
  87                                 new video_decoder(*input_.get_video_codec_context(), frame_factory) : nullptr);\r
  88                 }\r
  89                 catch(...)\r
  90                 {\r
  91                         CASPAR_LOG_CURRENT_EXCEPTION();\r
  92                         CASPAR_LOG(warning) << print() << " failed to initialize video-decoder.";\r
  93                 }\r
  94                 \r
  95                 try\r
  96                 {                       \r
  97                         audio_decoder_.reset(input_.get_audio_codec_context() ? \r
  98                                 new audio_decoder(*input_.get_audio_codec_context(), frame_factory->get_video_format_desc()) : nullptr);\r
  99                 }\r
 100                 catch(...)\r
 101                 {\r
 102                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 103                         CASPAR_LOG(warning) << print() << " failed to initialize audio-decoder.";\r
 104                 }               \r
 105 \r
 106                 if(!video_decoder_ && !audio_decoder_)\r
 107                 {\r
 108                         BOOST_THROW_EXCEPTION(\r
 109                                 caspar_exception() <<\r
 110                                 source_info(narrow(print())) << \r
 111                                 msg_info("Failed to initialize any decoder"));\r
 112                 }\r
 113         }\r
 114 \r
 115         virtual safe_ptr<core::basic_frame> receive()\r
 116         {\r
 117                 frame_timer_.restart();\r
 118 \r
 119                 std::shared_ptr<core::basic_frame> frame;       \r
 120                 for(size_t n = 0; !frame && input_.has_packet() && n < MAX_PACKET_OFFSET ; ++n) \r
 121                         frame = try_decode_frame();\r
 122                 \r
 123                 graph_->update_value("frame-time", static_cast<float>(frame_timer_.elapsed()*frame_factory_->get_video_format_desc().fps*0.5));\r
 124                                         \r
 125                 if(frame)\r
 126                         return make_safe(frame);\r
 127                 \r
 128                 if(!input_.is_running())\r
 129                         return core::basic_frame::eof();\r
 130 \r
 131                 if(!video_decoder_ && !audio_decoder_)\r
 132                         return core::basic_frame::eof();\r
 133                         \r
 134                 graph_->add_tag("underflow");\r
 135                 return core::basic_frame::late();       \r
 136         }\r
 137         \r
 138         virtual std::wstring print() const\r
 139         {\r
 140                 return L"ffmpeg[" + boost::filesystem::wpath(filename_).filename() + L"]";\r
 141         }\r
 142         \r
 143         std::shared_ptr<core::basic_frame> try_decode_frame()\r
 144         {\r
 145                 tbb::parallel_invoke\r
 146                 (\r
 147                         [&]\r
 148                         {\r
 149                                 if(video_frame_buffer_.size() < DECODED_PACKET_BUFFER_SIZE)\r
 150                                         try_decode_video_packet(input_.get_video_packet());\r
 151                         }, \r
 152                         [&]\r
 153                         {\r
 154                                 if(audio_chunk_buffer_.size() < DECODED_PACKET_BUFFER_SIZE)\r
 155                                         try_decode_audio_packet(input_.get_audio_packet());\r
 156                         }\r
 157                 );                      \r
 158 \r
 159                 return try_merge_audio_and_video();     \r
 160         }\r
 161 \r
 162         void try_decode_video_packet(packet&& video_packet)\r
 163         {\r
 164                 if(!video_decoder_)\r
 165                         return;\r
 166 \r
 167                 try\r
 168                 {\r
 169                         boost::range::push_back(video_frame_buffer_, video_decoder_->execute(std::move(video_packet)));\r
 170                 }\r
 171                 catch(...)\r
 172                 {\r
 173                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 174                         video_decoder_.reset();\r
 175                         CASPAR_LOG(warning) << print() << " removed video-stream.";\r
 176                 }\r
 177         }\r
 178 \r
 179         void try_decode_audio_packet(packet&& audio_packet)\r
 180         {\r
 181                 if(!audio_decoder_)\r
 182                         return;\r
 183 \r
 184                 try\r
 185                 {\r
 186                         boost::range::push_back(audio_chunk_buffer_, audio_decoder_->execute(std::move(audio_packet)));\r
 187                 }\r
 188                 catch(...)\r
 189                 {\r
 190                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 191                         audio_decoder_.reset();\r
 192                         CASPAR_LOG(warning) << print() << " removed audio-stream.";\r
 193                 }\r
 194         }\r
 195 \r
 196         std::shared_ptr<core::basic_frame> try_merge_audio_and_video()\r
 197         {               \r
 198                 std::shared_ptr<core::write_frame> frame;       \r
 199 \r
 200                 if(!video_frame_buffer_.empty() && !audio_chunk_buffer_.empty())\r
 201                 {\r
 202                         frame = video_frame_buffer_.front();                            \r
 203                         video_frame_buffer_.pop_front();\r
 204                                 \r
 205                         frame->audio_data() = std::move(audio_chunk_buffer_.front());\r
 206                         audio_chunk_buffer_.pop_front();        \r
 207                 }\r
 208                 else if(!video_frame_buffer_.empty() && !audio_decoder_)\r
 209                 {\r
 210                         frame = std::move(video_frame_buffer_.front());                         \r
 211                         video_frame_buffer_.pop_front();\r
 212                         frame->get_audio_transform().set_has_audio(false);      \r
 213                 }\r
 214                 else if(!audio_chunk_buffer_.empty() && !video_decoder_)\r
 215                 {\r
 216                         frame = frame_factory_->create_frame(this, 1, 1);\r
 217                         std::fill(frame->image_data().begin(), frame->image_data().end(), 0);\r
 218                                 \r
 219                         frame->audio_data() = std::move(audio_chunk_buffer_.front());\r
 220                         audio_chunk_buffer_.pop_front();\r
 221                 }\r
 222                 \r
 223                 return frame;   \r
 224         }\r
 225 };\r
 226 \r
 227 safe_ptr<core::frame_producer> create_ffmpeg_producer(const safe_ptr<core::frame_factory>& frame_factory, const std::vector<std::wstring>& params)\r
 228 {               \r
 229         static const std::vector<std::wstring> extensions = boost::assign::list_of\r
 230                 (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
 231         std::wstring filename = env::media_folder() + L"\\" + params[0];\r
 232         \r
 233         auto ext = boost::find_if(extensions, [&](const std::wstring& ex)\r
 234         {                                       \r
 235                 return boost::filesystem::is_regular_file(boost::filesystem::wpath(filename).replace_extension(ex));\r
 236         });\r
 237 \r
 238         if(ext == extensions.end())\r
 239                 return core::frame_producer::empty();\r
 240 \r
 241         std::wstring path = filename + L"." + *ext;\r
 242         bool loop = boost::find(params, L"LOOP") != params.end();\r
 243 \r
 244         static const boost::wregex expr(L"\\((?<START>\\d+)(,(?<LENGTH>\\d+)?)?\\)");//(,(?<END>\\d+))?\\]"); // boost::regex has no repeated captures?\r
 245         boost::wsmatch what;\r
 246         auto it = std::find_if(params.begin(), params.end(), [&](const std::wstring& str)\r
 247         {\r
 248                 return boost::regex_match(str, what, expr);\r
 249         });\r
 250 \r
 251         int start = -1;\r
 252         int length = -1;\r
 253 \r
 254         if(it != params.end())\r
 255         {\r
 256                 start = lexical_cast_or_default(what["START"].str(), -1);\r
 257                 if(what["LENGTH"].matched)\r
 258                         length = lexical_cast_or_default(what["LENGTH"].str(), -1);\r
 259         }\r
 260         \r
 261         return make_safe<ffmpeg_producer>(frame_factory, path, loop, start, length);\r
 262 }\r
 263 \r
 264 }