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::unique_ptr<audio_decoder>          audio_decoder_;\r
  58         std::unique_ptr<video_decoder>          video_decoder_;\r
  59 \r
  60         std::deque<safe_ptr<core::write_frame>> video_frame_channel_;   \r
  61         std::deque<std::vector<short>>                  audio_chunk_channel_;\r
  62 \r
  63         std::queue<safe_ptr<core::basic_frame>> ouput_channel_;\r
  64                 \r
  65         safe_ptr<core::basic_frame>                             last_frame_;\r
  66         std::shared_ptr<core::frame_factory>    frame_factory_;\r
  67 \r
  68         std::unique_ptr<input>                          input_; \r
  69 public:\r
  70         explicit ffmpeg_producer(const safe_ptr<core::frame_factory>& frame_factory, const std::wstring& filename, bool loop) \r
  71                 : filename_(filename)\r
  72                 , loop_(loop) \r
  73                 , last_frame_(core::basic_frame(core::basic_frame::empty()))\r
  74                 , frame_factory_(frame_factory)         \r
  75         {\r
  76                 graph_ = diagnostics::create_graph(boost::bind(&ffmpeg_producer::print, this)); \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                 input_.reset(new input(safe_ptr<diagnostics::graph>(graph_), filename_, loop_));\r
  82                 video_decoder_.reset(input_->get_video_codec_context().get() ? new video_decoder(input_->get_video_codec_context().get(), frame_factory) : nullptr);\r
  83                 audio_decoder_.reset(input_->get_audio_codec_context().get() ? new audio_decoder(input_->get_audio_codec_context().get(), frame_factory->get_video_format_desc().fps) : nullptr);\r
  84 \r
  85                 double frame_time = 1.0f/input_->fps();\r
  86                 double format_frame_time = 1.0/frame_factory->get_video_format_desc().fps;\r
  87                 if(abs(frame_time - format_frame_time) > 0.0001)\r
  88                         CASPAR_LOG(warning) << print() << L" Invalid framerate detected. This may cause distorted audio during playback. frame-time: " << frame_time;\r
  89         }\r
  90                         \r
  91         virtual safe_ptr<core::basic_frame> receive()\r
  92         {\r
  93                 perf_timer_.restart();\r
  94 \r
  95                 while(ouput_channel_.size() < 2 && !input_->is_eof())\r
  96                 {       \r
  97                         aligned_buffer video_packet;\r
  98                         if(video_frame_channel_.size() < 3 && video_decoder_)   \r
  99                                 video_packet = input_->get_video_packet();              \r
 100                         \r
 101                         aligned_buffer audio_packet;\r
 102                         if(audio_chunk_channel_.size() < 3 && audio_decoder_)   \r
 103                                 audio_packet = input_->get_audio_packet();      \r
 104 \r
 105                         if(video_packet.empty() && audio_packet.empty()) // Skip frame if lagging.                       \r
 106                                 break;\r
 107 \r
 108                         tbb::parallel_invoke(\r
 109                         [&]\r
 110                         {\r
 111                                 if(!video_packet.empty() && video_decoder_) // Video Decoding.\r
 112                                 {\r
 113                                         try\r
 114                                         {\r
 115                                                 auto frame = video_decoder_->execute(this, video_packet);\r
 116                                                 video_frame_channel_.push_back(std::move(frame));\r
 117                                         }\r
 118                                         catch(...)\r
 119                                         {\r
 120                                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
 121                                                 video_decoder_.reset();\r
 122                                                 CASPAR_LOG(warning) << print() << " removed video-stream.";\r
 123                                         }\r
 124                                 }\r
 125                         }, \r
 126                         [&] \r
 127                         { \r
 128                                 if(!audio_packet.empty() && audio_decoder_) // Audio Decoding.\r
 129                                 {\r
 130                                         try\r
 131                                         {\r
 132                                                 auto chunks = audio_decoder_->execute(audio_packet);\r
 133                                                 audio_chunk_channel_.insert(audio_chunk_channel_.end(), chunks.begin(), chunks.end());\r
 134                                         }\r
 135                                         catch(...)\r
 136                                         {\r
 137                                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
 138                                                 audio_decoder_.reset();\r
 139                                                 CASPAR_LOG(warning) << print() << " removed audio-stream.";\r
 140                                         }\r
 141                                 }\r
 142                         });\r
 143 \r
 144                         while((!video_frame_channel_.empty() || !video_decoder_) && (!audio_chunk_channel_.empty() || !audio_decoder_))\r
 145                         {\r
 146                                 std::shared_ptr<core::write_frame> frame;\r
 147 \r
 148                                 if(video_decoder_)\r
 149                                 {\r
 150                                         frame = video_frame_channel_.front();\r
 151                                         video_frame_channel_.pop_front();\r
 152                                 }\r
 153 \r
 154                                 if(audio_decoder_) \r
 155                                 {\r
 156                                         if(!frame) // If there is no video create a dummy frame.\r
 157                                         {\r
 158                                                 frame = frame_factory_->create_frame(this, 1, 1);\r
 159                                                 std::fill(frame->image_data().begin(), frame->image_data().end(), 0);\r
 160                                         }\r
 161                                         \r
 162                                         frame->audio_data() = std::move(audio_chunk_channel_.front());\r
 163                                         audio_chunk_channel_.pop_front();\r
 164                                 }\r
 165                                                         \r
 166                                 ouput_channel_.push(make_safe(frame));                          \r
 167                         }                               \r
 168 \r
 169                         if(ouput_channel_.empty() && video_packet.empty() && audio_packet.empty())                      \r
 170                                 return last_frame_;                     \r
 171                 }\r
 172                 \r
 173                 graph_->update_value("frame-time", static_cast<float>(perf_timer_.elapsed()*frame_factory_->get_video_format_desc().fps*0.5));\r
 174 \r
 175                 auto result = last_frame_;\r
 176                 if(!ouput_channel_.empty())             \r
 177                         result = get_frame(); // TODO: Support 50p              \r
 178                 else if(!input_->is_running())\r
 179                         result = core::basic_frame::eof();\r
 180                 else\r
 181                         graph_->add_tag("underflow");\r
 182                 \r
 183                 return result;\r
 184         }\r
 185 \r
 186         core::basic_frame get_frame()\r
 187         {\r
 188                 CASPAR_ASSERT(!ouput_channel_.empty());\r
 189                 auto result = std::move(ouput_channel_.front());\r
 190                 last_frame_ = core::basic_frame(result);\r
 191                 last_frame_->get_audio_transform().set_gain(0.0); // last_frame should not have audio\r
 192                 ouput_channel_.pop();\r
 193                 return result;\r
 194         }\r
 195 \r
 196         virtual std::wstring print() const\r
 197         {\r
 198                 return L"ffmpeg[" + boost::filesystem::wpath(filename_).filename() + L"]";\r
 199         }\r
 200 };\r
 201 \r
 202 safe_ptr<core::frame_producer> create_ffmpeg_producer(const safe_ptr<core::frame_factory>& frame_factory, const std::vector<std::wstring>& params)\r
 203 {               \r
 204         static const std::vector<std::wstring> extensions = boost::assign::list_of\r
 205                 (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
 206         std::wstring filename = env::media_folder() + L"\\" + params[0];\r
 207         \r
 208         auto ext = std::find_if(extensions.begin(), extensions.end(), [&](const std::wstring& ex) -> bool\r
 209                 {                                       \r
 210                         return boost::filesystem::is_regular_file(boost::filesystem::wpath(filename).replace_extension(ex));\r
 211                 });\r
 212 \r
 213         if(ext == extensions.end())\r
 214                 return core::frame_producer::empty();\r
 215 \r
 216         std::wstring path = filename + L"." + *ext;\r
 217         bool loop = std::find(params.begin(), params.end(), L"LOOP") != params.end();\r
 218         \r
 219         return make_safe<ffmpeg_producer>(frame_factory, path, loop);\r
 220 }\r
 221 \r
 222 }