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/diagnostics/graph.h>\r
  29 #include <common/env.h>\r
  30 #include <common/utility/algorithm.h>\r
  31 \r
  32 #include <core/video_format.h>\r
  33 #include <core/producer/frame/basic_frame.h>\r
  34 #include <core/producer/frame/write_frame.h>\r
  35 #include <core/producer/frame/audio_transform.h>\r
  36 \r
  37 #include <tbb/parallel_invoke.h>\r
  38 \r
  39 #include <boost/timer.hpp>\r
  40 \r
  41 #include <deque>\r
  42 \r
  43 namespace caspar {\r
  44         \r
  45 struct ffmpeg_producer : public core::frame_producer\r
  46 {\r
  47         const std::wstring                                              filename_;\r
  48         const bool                                                              loop_;\r
  49         \r
  50         std::shared_ptr<diagnostics::graph>             graph_;\r
  51         boost::timer                                                    perf_timer_;\r
  52                 \r
  53         std::deque<safe_ptr<core::write_frame>> video_frame_buffer_;    \r
  54         std::deque<std::vector<short>>                  audio_chunk_buffer_;\r
  55         std::queue<safe_ptr<core::basic_frame>> output_channel_;\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_frame, int end_frame) \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_frame, end_frame)\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().get() ? \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().get() ? \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                                 msg_info("Failed to initialize any decoder"));\r
 108                 }\r
 109         }\r
 110 \r
 111         virtual safe_ptr<core::basic_frame> receive()\r
 112         {\r
 113                 perf_timer_.restart();\r
 114 \r
 115                 for(size_t n = 0; output_channel_.size() < 2 && input_.has_packet() && n < 32; ++n) // 32 packets should be enough. Otherwise there probably was an error and we want to avoid infinite recursion.\r
 116                 {       \r
 117                         tbb::parallel_invoke\r
 118                         (\r
 119                                 [&]\r
 120                                 {\r
 121                                         if(video_frame_buffer_.size() < 3)\r
 122                                                 try_decode_video_packet(input_.get_video_packet());\r
 123                                 }, \r
 124                                 [&]\r
 125                                 {\r
 126                                         if(audio_chunk_buffer_.size() < 3)\r
 127                                                 try_decode_audio_packet(input_.get_audio_packet());\r
 128                                 }\r
 129                         );                      \r
 130 \r
 131                         merge_audio_and_video();        \r
 132                 }\r
 133                 \r
 134                 graph_->update_value("frame-time", static_cast<float>(perf_timer_.elapsed()*frame_factory_->get_video_format_desc().fps*0.5));\r
 135                                         \r
 136                 return get_next_frame();\r
 137         }\r
 138 \r
 139         virtual std::wstring print() const\r
 140         {\r
 141                 return L"ffmpeg[" + boost::filesystem::wpath(filename_).filename() + L"]";\r
 142         }\r
 143 \r
 144         void try_decode_video_packet(const std::shared_ptr<aligned_buffer>& video_packet)\r
 145         {\r
 146                 if(video_decoder_) // Video Decoding.\r
 147                 {\r
 148                         try\r
 149                         {\r
 150                                 auto frame = video_decoder_->execute(this, video_packet);\r
 151                                 if(frame)\r
 152                                         video_frame_buffer_.push_back(make_safe(std::move(frame)));\r
 153                         }\r
 154                         catch(...)\r
 155                         {\r
 156                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
 157                                 video_decoder_.reset();\r
 158                                 CASPAR_LOG(warning) << print() << " removed video-stream.";\r
 159                         }\r
 160                 }\r
 161         }\r
 162 \r
 163         void try_decode_audio_packet(const std::shared_ptr<aligned_buffer>& audio_packet)\r
 164         {\r
 165                 if(audio_decoder_) // Audio Decoding.\r
 166                 {\r
 167                         try\r
 168                         {\r
 169                                 auto chunks = audio_decoder_->execute(audio_packet);\r
 170                                 audio_chunk_buffer_.insert(audio_chunk_buffer_.end(), chunks.begin(), chunks.end());\r
 171                         }\r
 172                         catch(...)\r
 173                         {\r
 174                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
 175                                 audio_decoder_.reset();\r
 176                                 CASPAR_LOG(warning) << print() << " removed audio-stream.";\r
 177                         }\r
 178                 }\r
 179         }\r
 180 \r
 181         void merge_audio_and_video()\r
 182         {               \r
 183                 std::shared_ptr<core::write_frame> frame;       \r
 184 \r
 185                 if(!video_frame_buffer_.empty() && !audio_chunk_buffer_.empty())\r
 186                 {\r
 187                         frame = pop_front(video_frame_buffer_);\r
 188                         frame->audio_data() = pop_front(audio_chunk_buffer_);\r
 189                 }\r
 190                 else if(!video_frame_buffer_.empty() && !audio_decoder_)\r
 191                 {\r
 192                         frame = pop_front(video_frame_buffer_);\r
 193                         frame->get_audio_transform().set_has_audio(false);      \r
 194                 }\r
 195                 else if(!audio_chunk_buffer_.empty() && !video_decoder_)\r
 196                 {\r
 197                         frame = frame_factory_->create_frame(this, 1, 1);\r
 198                         std::fill(frame->image_data().begin(), frame->image_data().end(), 0);\r
 199                                 \r
 200                         frame->audio_data() = pop_front(audio_chunk_buffer_);\r
 201                 }\r
 202                 \r
 203                 if(frame)\r
 204                         output_channel_.push(make_safe(frame));                 \r
 205         }\r
 206                 \r
 207         safe_ptr<core::basic_frame> get_next_frame()\r
 208         {\r
 209                 if(is_eof())\r
 210                         return core::basic_frame::eof();\r
 211 \r
 212                 if(output_channel_.empty())\r
 213                 {\r
 214                         graph_->add_tag("underflow");\r
 215                         return core::basic_frame::late();                       \r
 216                 }\r
 217 \r
 218                 return pop_front(output_channel_);\r
 219         }\r
 220 \r
 221         bool is_eof() const\r
 222         {\r
 223                 return output_channel_.empty() && (!video_decoder_ && !audio_decoder_) || !input_.is_running();\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 = std::find_if(extensions.begin(), extensions.end(), [&](const std::wstring& ex) -> bool\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 = std::find(params.begin(), params.end(), L"LOOP") != params.end();\r
 243 \r
 244         static const boost::wregex expr(L"\\((?<START>\\d+)(,(?<END>\\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 end = -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["END"].matched)\r
 258                         end = lexical_cast_or_default(what["END"].str(), -1);\r
 259         }\r
 260         \r
 261         return make_safe<ffmpeg_producer>(frame_factory, path, loop, start, end);\r
 262 }\r
 263 \r
 264 }