git.sesse.net Git - casparcg/blob - modules/ffmpeg/producer/ffmpeg_producer.cpp

   1 #include "../stdafx.h"\r
   2 \r
   3 #include "ffmpeg_producer.h"\r
   4 \r
   5 #include "input.h"\r
   6 #include "audio/audio_decoder.h"\r
   7 #include "video/video_decoder.h"\r
   8 \r
   9 #include <common/utility/timer.h>\r
  10 #include <common/diagnostics/graph.h>\r
  11 \r
  12 #include <core/producer/frame/basic_frame.h>\r
  13 #include <core/producer/frame/write_frame.h>\r
  14 #include <core/producer/frame/audio_transform.h>\r
  15 #include <core/video_format.h>\r
  16 \r
  17 #include <common/env.h>\r
  18 #include <common/utility/timer.h>\r
  19 #include <common/utility/assert.h>\r
  20 \r
  21 #include <tbb/parallel_invoke.h>\r
  22 \r
  23 #include <deque>\r
  24 #include <functional>\r
  25 \r
  26 namespace caspar {\r
  27         \r
  28 struct ffmpeg_producer : public core::frame_producer\r
  29 {\r
  30         const std::wstring                                      filename_;\r
  31         const bool                                                      loop_;\r
  32         \r
  33         std::shared_ptr<diagnostics::graph>     graph_;\r
  34         timer                                                           perf_timer_;\r
  35                 \r
  36         std::unique_ptr<audio_decoder>          audio_decoder_;\r
  37         std::unique_ptr<video_decoder>          video_decoder_;\r
  38 \r
  39         std::deque<safe_ptr<core::write_frame>> video_frame_channel_;   \r
  40         std::deque<std::vector<short>>                  audio_chunk_channel_;\r
  41 \r
  42         std::queue<safe_ptr<core::basic_frame>> ouput_channel_;\r
  43                 \r
  44         safe_ptr<core::basic_frame>                             last_frame_;\r
  45         std::shared_ptr<core::frame_factory>    frame_factory_;\r
  46 \r
  47         std::unique_ptr<input>                          input_; \r
  48 public:\r
  49         explicit ffmpeg_producer(const safe_ptr<core::frame_factory>& frame_factory, const std::wstring& filename, bool loop) \r
  50                 : filename_(filename)\r
  51                 , loop_(loop) \r
  52                 , last_frame_(core::basic_frame(core::basic_frame::empty()))\r
  53                 , frame_factory_(frame_factory)         \r
  54         {\r
  55                 graph_ = diagnostics::create_graph(boost::bind(&ffmpeg_producer::print, this)); \r
  56                 graph_->add_guide("frame-time", 0.5);\r
  57                 graph_->set_color("frame-time",  diagnostics::color(1.0f, 0.0f, 0.0f));\r
  58 \r
  59                 input_.reset(new input(safe_ptr<diagnostics::graph>(graph_), filename_, loop_));\r
  60                 video_decoder_.reset(input_->get_video_codec_context().get() ? new video_decoder(input_->get_video_codec_context().get(), frame_factory) : nullptr);\r
  61                 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
  62 \r
  63                 double frame_time = 1.0f/input_->fps();\r
  64                 double format_frame_time = 1.0/frame_factory->get_video_format_desc().fps;\r
  65                 if(abs(frame_time - format_frame_time) > 0.0001)\r
  66                         CASPAR_LOG(warning) << print() << L" Invalid framerate detected. This may cause distorted audio during playback. frame-time: " << frame_time;\r
  67         }\r
  68                         \r
  69         virtual safe_ptr<core::basic_frame> receive()\r
  70         {\r
  71                 perf_timer_.reset();\r
  72 \r
  73                 while(ouput_channel_.size() < 2 && !input_->is_eof())\r
  74                 {       \r
  75                         aligned_buffer video_packet;\r
  76                         if(video_frame_channel_.size() < 3 && video_decoder_)   \r
  77                                 video_packet = input_->get_video_packet();              \r
  78                         \r
  79                         aligned_buffer audio_packet;\r
  80                         if(audio_chunk_channel_.size() < 3 && audio_decoder_)   \r
  81                                 audio_packet = input_->get_audio_packet();              \r
  82 \r
  83                         tbb::parallel_invoke(\r
  84                         [&]\r
  85                         { // Video Decoding and Scaling\r
  86                                 if(!video_packet.empty() && video_decoder_)\r
  87                                 {\r
  88                                         try\r
  89                                         {\r
  90                                                 auto frame = video_decoder_->execute(this, video_packet);\r
  91                                                 video_frame_channel_.push_back(std::move(frame));\r
  92                                         }\r
  93                                         catch(...)\r
  94                                         {\r
  95                                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
  96                                                 video_decoder_.reset();\r
  97                                                 CASPAR_LOG(warning) << print() << " removed video-stream.";\r
  98                                         }\r
  99                                 }\r
 100                         }, \r
 101                         [&] \r
 102                         { // Audio Decoding\r
 103                                 if(!audio_packet.empty() && audio_decoder_)\r
 104                                 {\r
 105                                         try\r
 106                                         {\r
 107                                                 auto chunks = audio_decoder_->execute(audio_packet);\r
 108                                                 audio_chunk_channel_.insert(audio_chunk_channel_.end(), chunks.begin(), chunks.end());\r
 109                                         }\r
 110                                         catch(...)\r
 111                                         {\r
 112                                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
 113                                                 audio_decoder_.reset();\r
 114                                                 CASPAR_LOG(warning) << print() << " removed audio-stream.";\r
 115                                         }\r
 116                                 }\r
 117                         });\r
 118 \r
 119                         while((!video_frame_channel_.empty() || !video_decoder_) && (!audio_chunk_channel_.empty() || !audio_decoder_))\r
 120                         {\r
 121                                 std::shared_ptr<core::write_frame> frame;\r
 122 \r
 123                                 if(video_decoder_)\r
 124                                 {\r
 125                                         frame = video_frame_channel_.front();\r
 126                                         video_frame_channel_.pop_front();\r
 127                                 }\r
 128 \r
 129                                 if(audio_decoder_) \r
 130                                 {\r
 131                                         if(!frame) // If there is no video create a dummy frame.\r
 132                                         {\r
 133                                                 frame = frame_factory_->create_frame(this, 1, 1);\r
 134                                                 std::fill(frame->image_data().begin(), frame->image_data().end(), 0);\r
 135                                         }\r
 136                                         \r
 137                                         frame->audio_data() = std::move(audio_chunk_channel_.front());\r
 138                                         audio_chunk_channel_.pop_front();\r
 139                                 }\r
 140                                                         \r
 141                                 ouput_channel_.push(safe_ptr<core::write_frame>(frame));                                \r
 142                         }                               \r
 143 \r
 144                         if(ouput_channel_.empty() && video_packet.empty() && audio_packet.empty())                      \r
 145                                 return last_frame_;                     \r
 146                 }\r
 147                 \r
 148                 graph_->update_value("frame-time", static_cast<float>(perf_timer_.elapsed()/frame_factory_->get_video_format_desc().interval*0.5));\r
 149 \r
 150                 auto result = last_frame_;\r
 151                 if(!ouput_channel_.empty())             \r
 152                         result = get_frame(); // TODO: Support 50p              \r
 153                 else if(input_->is_eof())\r
 154                         result = core::basic_frame::eof();\r
 155                 \r
 156                 return result;\r
 157         }\r
 158 \r
 159         core::basic_frame get_frame()\r
 160         {\r
 161                 CASPAR_ASSERT(!ouput_channel_.empty());\r
 162                 auto result = std::move(ouput_channel_.front());\r
 163                 last_frame_ = core::basic_frame(result);\r
 164                 last_frame_->get_audio_transform().set_gain(0.0); // last_frame should not have audio\r
 165                 ouput_channel_.pop();\r
 166                 return result;\r
 167         }\r
 168 \r
 169         virtual std::wstring print() const\r
 170         {\r
 171                 return L"ffmpeg[" + boost::filesystem::wpath(filename_).filename() + L"]";\r
 172         }\r
 173 };\r
 174 \r
 175 safe_ptr<core::frame_producer> create_ffmpeg_producer(const safe_ptr<core::frame_factory>& frame_factory, const std::vector<std::wstring>& params)\r
 176 {                       \r
 177         static const std::vector<std::wstring> extensions = boost::assign::list_of\r
 178                 (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
 179         std::wstring filename = env::media_folder() + L"\\" + params[0];\r
 180         \r
 181         auto ext = std::find_if(extensions.begin(), extensions.end(), [&](const std::wstring& ex) -> bool\r
 182                 {                                       \r
 183                         return boost::filesystem::is_regular_file(boost::filesystem::wpath(filename).replace_extension(ex));\r
 184                 });\r
 185 \r
 186         if(ext == extensions.end())\r
 187                 return core::frame_producer::empty();\r
 188 \r
 189         std::wstring path = filename + L"." + *ext;\r
 190         bool loop = std::find(params.begin(), params.end(), L"LOOP") != params.end();\r
 191         \r
 192         return make_safe<ffmpeg_producer>(frame_factory, path, loop);\r
 193 }\r
 194 \r
 195 }