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 <deque>\r
  43 #include <functional>\r
  44 \r
  45 namespace caspar {\r
  46         \r
  47 struct ffmpeg_producer : public core::frame_producer\r
  48 {\r
  49         const std::wstring                                      filename_;\r
  50         const bool                                                      loop_;\r
  51         \r
  52         std::shared_ptr<diagnostics::graph>     graph_;\r
  53         timer                                                           perf_timer_;\r
  54                 \r
  55         std::unique_ptr<audio_decoder>          audio_decoder_;\r
  56         std::unique_ptr<video_decoder>          video_decoder_;\r
  57 \r
  58         std::deque<safe_ptr<core::write_frame>> video_frame_channel_;   \r
  59         std::deque<std::vector<short>>                  audio_chunk_channel_;\r
  60 \r
  61         std::queue<safe_ptr<core::basic_frame>> ouput_channel_;\r
  62                 \r
  63         safe_ptr<core::basic_frame>                             last_frame_;\r
  64         std::shared_ptr<core::frame_factory>    frame_factory_;\r
  65 \r
  66         std::unique_ptr<input>                          input_; \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                 , last_frame_(core::basic_frame(core::basic_frame::empty()))\r
  72                 , frame_factory_(frame_factory)         \r
  73         {\r
  74                 graph_ = diagnostics::create_graph(boost::bind(&ffmpeg_producer::print, this)); \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                 input_.reset(new input(safe_ptr<diagnostics::graph>(graph_), filename_, loop_));\r
  80                 video_decoder_.reset(input_->get_video_codec_context().get() ? new video_decoder(input_->get_video_codec_context().get(), frame_factory) : nullptr);\r
  81                 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
  82 \r
  83                 double frame_time = 1.0f/input_->fps();\r
  84                 double format_frame_time = 1.0/frame_factory->get_video_format_desc().fps;\r
  85                 if(abs(frame_time - format_frame_time) > 0.0001)\r
  86                         CASPAR_LOG(warning) << print() << L" Invalid framerate detected. This may cause distorted audio during playback. frame-time: " << frame_time;\r
  87         }\r
  88                         \r
  89         virtual safe_ptr<core::basic_frame> receive()\r
  90         {\r
  91                 perf_timer_.reset();\r
  92 \r
  93                 while(ouput_channel_.size() < 2 && !input_->is_eof())\r
  94                 {       \r
  95                         aligned_buffer video_packet;\r
  96                         if(video_frame_channel_.size() < 3 && video_decoder_)   \r
  97                                 video_packet = input_->get_video_packet();              \r
  98                         \r
  99                         aligned_buffer audio_packet;\r
 100                         if(audio_chunk_channel_.size() < 3 && audio_decoder_)   \r
 101                                 audio_packet = input_->get_audio_packet();      \r
 102 \r
 103                         if(video_packet.empty() && audio_packet.empty()) // Skip frame if lagging.                       \r
 104                                 break;\r
 105 \r
 106                         tbb::parallel_invoke(\r
 107                         [&]\r
 108                         {\r
 109                                 if(!video_packet.empty() && video_decoder_) // Video Decoding.\r
 110                                 {\r
 111                                         try\r
 112                                         {\r
 113                                                 auto frame = video_decoder_->execute(this, video_packet);\r
 114                                                 video_frame_channel_.push_back(std::move(frame));\r
 115                                         }\r
 116                                         catch(...)\r
 117                                         {\r
 118                                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
 119                                                 video_decoder_.reset();\r
 120                                                 CASPAR_LOG(warning) << print() << " removed video-stream.";\r
 121                                         }\r
 122                                 }\r
 123                         }, \r
 124                         [&] \r
 125                         { \r
 126                                 if(!audio_packet.empty() && audio_decoder_) // Audio Decoding.\r
 127                                 {\r
 128                                         try\r
 129                                         {\r
 130                                                 auto chunks = audio_decoder_->execute(audio_packet);\r
 131                                                 audio_chunk_channel_.insert(audio_chunk_channel_.end(), chunks.begin(), chunks.end());\r
 132                                         }\r
 133                                         catch(...)\r
 134                                         {\r
 135                                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
 136                                                 audio_decoder_.reset();\r
 137                                                 CASPAR_LOG(warning) << print() << " removed audio-stream.";\r
 138                                         }\r
 139                                 }\r
 140                         });\r
 141 \r
 142                         while((!video_frame_channel_.empty() || !video_decoder_) && (!audio_chunk_channel_.empty() || !audio_decoder_))\r
 143                         {\r
 144                                 std::shared_ptr<core::write_frame> frame;\r
 145 \r
 146                                 if(video_decoder_)\r
 147                                 {\r
 148                                         frame = video_frame_channel_.front();\r
 149                                         video_frame_channel_.pop_front();\r
 150                                 }\r
 151 \r
 152                                 if(audio_decoder_) \r
 153                                 {\r
 154                                         if(!frame) // If there is no video create a dummy frame.\r
 155                                         {\r
 156                                                 frame = frame_factory_->create_frame(this, 1, 1);\r
 157                                                 std::fill(frame->image_data().begin(), frame->image_data().end(), 0);\r
 158                                         }\r
 159                                         \r
 160                                         frame->audio_data() = std::move(audio_chunk_channel_.front());\r
 161                                         audio_chunk_channel_.pop_front();\r
 162                                 }\r
 163                                                         \r
 164                                 ouput_channel_.push(make_safe(frame));                          \r
 165                         }                               \r
 166 \r
 167                         if(ouput_channel_.empty() && video_packet.empty() && audio_packet.empty())                      \r
 168                                 return last_frame_;                     \r
 169                 }\r
 170                 \r
 171                 graph_->update_value("frame-time", static_cast<float>(perf_timer_.elapsed()/frame_factory_->get_video_format_desc().interval*0.5));\r
 172 \r
 173                 auto result = last_frame_;\r
 174                 if(!ouput_channel_.empty())             \r
 175                         result = get_frame(); // TODO: Support 50p              \r
 176                 else if(!input_->is_running())\r
 177                         result = core::basic_frame::eof();\r
 178                 else\r
 179                         graph_->add_tag("underflow");\r
 180                 \r
 181                 return result;\r
 182         }\r
 183 \r
 184         core::basic_frame get_frame()\r
 185         {\r
 186                 CASPAR_ASSERT(!ouput_channel_.empty());\r
 187                 auto result = std::move(ouput_channel_.front());\r
 188                 last_frame_ = core::basic_frame(result);\r
 189                 last_frame_->get_audio_transform().set_gain(0.0); // last_frame should not have audio\r
 190                 ouput_channel_.pop();\r
 191                 return result;\r
 192         }\r
 193 \r
 194         virtual std::wstring print() const\r
 195         {\r
 196                 return L"ffmpeg[" + boost::filesystem::wpath(filename_).filename() + L"]";\r
 197         }\r
 198 };\r
 199 \r
 200 safe_ptr<core::frame_producer> create_ffmpeg_producer(const safe_ptr<core::frame_factory>& frame_factory, const std::vector<std::wstring>& params)\r
 201 {                       \r
 202         static const std::vector<std::wstring> extensions = boost::assign::list_of\r
 203                 (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"wmw")(L"wma")(L"ogg")(L"divx")(L"wav")(L"mp3");\r
 204         std::wstring filename = env::media_folder() + L"\\" + params[0];\r
 205         \r
 206         auto ext = std::find_if(extensions.begin(), extensions.end(), [&](const std::wstring& ex) -> bool\r
 207                 {                                       \r
 208                         return boost::filesystem::is_regular_file(boost::filesystem::wpath(filename).replace_extension(ex));\r
 209                 });\r
 210 \r
 211         if(ext == extensions.end())\r
 212                 return core::frame_producer::empty();\r
 213 \r
 214         std::wstring path = filename + L"." + *ext;\r
 215         bool loop = std::find(params.begin(), params.end(), L"LOOP") != params.end();\r
 216         \r
 217         return make_safe<ffmpeg_producer>(frame_factory, path, loop);\r
 218 }\r
 219 \r
 220 }