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 #include <common/utility/timer.h>\r
  38 #include <common/utility/assert.h>\r
  39 \r
  40 #include <tbb/parallel_invoke.h>\r
  41 \r
  42 #include <boost/timer.hpp>\r
  43 \r
  44 #include <deque>\r
  45 #include <functional>\r
  46 \r
  47 namespace caspar {\r
  48         \r
  49 struct ffmpeg_producer : public core::frame_producer\r
  50 {\r
  51         const std::wstring                                      filename_;\r
  52         const bool                                                      loop_;\r
  53         \r
  54         std::shared_ptr<diagnostics::graph>     graph_;\r
  55         boost::timer                                            perf_timer_;\r
  56                 \r
  57         std::deque<safe_ptr<core::write_frame>> video_frame_buffer_;    \r
  58         std::deque<std::vector<short>>                  audio_chunk_buffer_;\r
  59 \r
  60         std::queue<safe_ptr<core::basic_frame>> ouput_channel_;\r
  61                 \r
  62         std::shared_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) \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_)\r
  74                 , video_decoder_(input_.get_video_codec_context().get() ? new video_decoder(input_.get_video_codec_context().get(), frame_factory) : nullptr)\r
  75                 , audio_decoder_(input_.get_audio_codec_context().get() ? new audio_decoder(input_.get_audio_codec_context().get(), frame_factory->get_video_format_desc().fps) : nullptr)\r
  76         {\r
  77                 graph_->add_guide("frame-time", 0.5);\r
  78                 graph_->set_color("frame-time",  diagnostics::color(1.0f, 0.0f, 0.0f));\r
  79                 graph_->set_color("underflow", diagnostics::color(0.6f, 0.3f, 0.9f));           \r
  80                 \r
  81                 double frame_time = 1.0f/input_.fps();\r
  82                 double format_frame_time = 1.0/frame_factory->get_video_format_desc().fps;\r
  83                 if(abs(frame_time - format_frame_time) > 0.0001)\r
  84                         CASPAR_LOG(warning) << print() << L" Invalid framerate detected. This may cause distorted audio during playback. frame-time: " << frame_time;\r
  85         }\r
  86 \r
  87         virtual safe_ptr<core::basic_frame> receive()\r
  88         {\r
  89                 perf_timer_.restart();\r
  90 \r
  91                 for(size_t n = 0; ouput_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
  92                 {       \r
  93                         tbb::parallel_invoke\r
  94                         (\r
  95                                 [&]\r
  96                                 {\r
  97                                         if(video_frame_buffer_.size() < 3)\r
  98                                                 try_decode_video_packet(input_.get_video_packet());\r
  99                                 }, \r
 100                                 [&]\r
 101                                 {\r
 102                                         if(audio_chunk_buffer_.size() < 3)\r
 103                                                 try_decode_audio_packet(input_.get_audio_packet());\r
 104                                 }\r
 105                         );                      \r
 106 \r
 107                         merge_audio_and_video();        \r
 108                 }\r
 109                 \r
 110                 graph_->update_value("frame-time", static_cast<float>(perf_timer_.elapsed()*frame_factory_->get_video_format_desc().fps*0.5));\r
 111                                         \r
 112                 return get_next_frame();\r
 113         }\r
 114 \r
 115         virtual std::wstring print() const\r
 116         {\r
 117                 return L"ffmpeg[" + boost::filesystem::wpath(filename_).filename() + L"]";\r
 118         }\r
 119 \r
 120         void try_decode_video_packet(const aligned_buffer& video_packet)\r
 121         {\r
 122                 if(!video_packet.empty() && video_decoder_) // Video Decoding.\r
 123                 {\r
 124                         try\r
 125                         {\r
 126                                 auto frame = video_decoder_->execute(this, video_packet);\r
 127                                 if(frame)\r
 128                                         video_frame_buffer_.push_back(make_safe(std::move(frame)));\r
 129                         }\r
 130                         catch(...)\r
 131                         {\r
 132                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
 133                                 video_decoder_.reset();\r
 134                                 CASPAR_LOG(warning) << print() << " removed video-stream.";\r
 135                         }\r
 136                 }\r
 137         }\r
 138 \r
 139         void try_decode_audio_packet(const aligned_buffer& audio_packet)\r
 140         {\r
 141                 if(audio_chunk_buffer_.size() < 3 && !audio_packet.empty() && audio_decoder_) // Audio Decoding.\r
 142                 {\r
 143                         try\r
 144                         {\r
 145                                 auto chunks = audio_decoder_->execute(audio_packet);\r
 146                                 audio_chunk_buffer_.insert(audio_chunk_buffer_.end(), chunks.begin(), chunks.end());\r
 147                         }\r
 148                         catch(...)\r
 149                         {\r
 150                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
 151                                 audio_decoder_.reset();\r
 152                                 CASPAR_LOG(warning) << print() << " removed audio-stream.";\r
 153                         }\r
 154                 }\r
 155         }\r
 156 \r
 157         void merge_audio_and_video()\r
 158         {               \r
 159                 std::shared_ptr<core::write_frame> frame;       \r
 160 \r
 161                 if(!video_frame_buffer_.empty() && !audio_chunk_buffer_.empty())\r
 162                 {\r
 163                         frame = video_frame_buffer_.front();                            \r
 164                         video_frame_buffer_.pop_front();\r
 165                                 \r
 166                         frame->audio_data() = std::move(audio_chunk_buffer_.front());\r
 167                         audio_chunk_buffer_.pop_front();        \r
 168                 }\r
 169                 else if(!video_frame_buffer_.empty() && !audio_decoder_)\r
 170                 {\r
 171                         frame = video_frame_buffer_.front();                            \r
 172                         video_frame_buffer_.pop_front();\r
 173                         frame->get_audio_transform().set_has_audio(false);      \r
 174                 }\r
 175                 else if(!audio_chunk_buffer_.empty() && !video_decoder_)\r
 176                 {\r
 177                         frame = frame_factory_->create_frame(this, 1, 1);\r
 178                         std::fill(frame->image_data().begin(), frame->image_data().end(), 0);\r
 179                                 \r
 180                         frame->audio_data() = std::move(audio_chunk_buffer_.front());\r
 181                         audio_chunk_buffer_.pop_front();\r
 182                 }\r
 183                 \r
 184                 if(frame)\r
 185                         ouput_channel_.push(make_safe(frame));                  \r
 186         }\r
 187                 \r
 188         safe_ptr<core::basic_frame> get_next_frame()\r
 189         {\r
 190                 if(is_eof())\r
 191                         return core::basic_frame::eof();\r
 192 \r
 193                 if(ouput_channel_.empty())\r
 194                 {\r
 195                         graph_->add_tag("underflow");\r
 196                         return core::basic_frame::late();                       \r
 197                 }\r
 198 \r
 199                 auto frame = std::move(ouput_channel_.front());\r
 200                 ouput_channel_.pop();           \r
 201                 return frame;\r
 202         }\r
 203 \r
 204         bool is_eof() const\r
 205         {\r
 206                 return ouput_channel_.empty() && (!video_decoder_ && !audio_decoder_) || !input_.is_running();\r
 207         }\r
 208 };\r
 209 \r
 210 safe_ptr<core::frame_producer> create_ffmpeg_producer(const safe_ptr<core::frame_factory>& frame_factory, const std::vector<std::wstring>& params)\r
 211 {               \r
 212         static const std::vector<std::wstring> extensions = boost::assign::list_of\r
 213                 (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
 214         std::wstring filename = env::media_folder() + L"\\" + params[0];\r
 215         \r
 216         auto ext = std::find_if(extensions.begin(), extensions.end(), [&](const std::wstring& ex) -> bool\r
 217                 {                                       \r
 218                         return boost::filesystem::is_regular_file(boost::filesystem::wpath(filename).replace_extension(ex));\r
 219                 });\r
 220 \r
 221         if(ext == extensions.end())\r
 222                 return core::frame_producer::empty();\r
 223 \r
 224         std::wstring path = filename + L"." + *ext;\r
 225         bool loop = std::find(params.begin(), params.end(), L"LOOP") != params.end();\r
 226         \r
 227         return make_safe<ffmpeg_producer>(frame_factory, path, loop);\r
 228 }\r
 229 \r
 230 }