git.sesse.net Git - casparcg/blob - core/producer/ffmpeg/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 <core/video_format.h>\r
  10 #include <common/utility/timer.h>\r
  11 #include <common/diagnostics/graph.h>\r
  12 #include <mixer/frame/draw_frame.h>\r
  13 #include <mixer/audio/audio_transform.h>\r
  14 \r
  15 #include <common/env.h>\r
  16 \r
  17 #include <tbb/parallel_invoke.h>\r
  18 \r
  19 #include <deque>\r
  20 \r
  21 namespace caspar { namespace core { namespace ffmpeg{\r
  22         \r
  23 struct ffmpeg_producer : public frame_producer\r
  24 {\r
  25         safe_ptr<diagnostics::graph>            graph_;\r
  26         timer                                                           perf_timer_;\r
  27 \r
  28         input                                                           input_;                 \r
  29         std::unique_ptr<audio_decoder>          audio_decoder_;\r
  30         std::unique_ptr<video_decoder>          video_decoder_;\r
  31 \r
  32         std::deque<safe_ptr<write_frame>>       video_frame_channel_;   \r
  33         std::deque<std::vector<short>>          audio_chunk_channel_;\r
  34 \r
  35         std::queue<safe_ptr<draw_frame>>        ouput_channel_;\r
  36         \r
  37         const std::wstring                                      filename_;\r
  38         \r
  39         safe_ptr<draw_frame>                            last_frame_;\r
  40         std::shared_ptr<frame_factory>          frame_factory_;\r
  41 \r
  42 public:\r
  43         explicit ffmpeg_producer(const std::wstring& filename, bool loop) \r
  44                 : graph_(diagnostics::create_graph("ffmpeg"))\r
  45                 , filename_(filename)\r
  46                 , last_frame_(draw_frame(draw_frame::empty()))\r
  47                 , input_(graph_, filename, loop)\r
  48         {\r
  49                 graph_->add_guide("frame_time_target", 0.5, diagnostics::color(1.0f, 0.0f, 0.0f));\r
  50                 graph_->set_color("frame_time",  diagnostics::color(1.0f, 0.0f, 0.0f));\r
  51         }\r
  52 \r
  53         ~ffmpeg_producer()\r
  54         {\r
  55                 CASPAR_LOG(info) << print() << " closing.";\r
  56         }\r
  57 \r
  58         virtual void initialize(const safe_ptr<frame_factory>& frame_factory)\r
  59         {\r
  60                 frame_factory_ = frame_factory;\r
  61                 video_decoder_.reset(input_.get_video_codec_context().get() ? new video_decoder(input_.get_video_codec_context().get(), frame_factory) : nullptr);\r
  62                 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
  63         }\r
  64                 \r
  65         virtual safe_ptr<draw_frame> receive()\r
  66         {\r
  67                 perf_timer_.reset();\r
  68 \r
  69                 while(ouput_channel_.empty() && !input_.is_eof())\r
  70                 {       \r
  71                         aligned_buffer video_packet;\r
  72                         if(video_frame_channel_.size() < 3 && video_decoder_)   \r
  73                                 video_packet = input_.get_video_packet();               \r
  74                         \r
  75                         aligned_buffer audio_packet;\r
  76                         if(audio_chunk_channel_.size() < 3 && audio_decoder_)   \r
  77                                 audio_packet = input_.get_audio_packet();               \r
  78 \r
  79                         tbb::parallel_invoke(\r
  80                         [&]\r
  81                         { // Video Decoding and Scaling\r
  82                                 if(!video_packet.empty() && video_decoder_)\r
  83                                 {\r
  84                                         try\r
  85                                         {\r
  86                                                 auto frame = video_decoder_->execute(video_packet);\r
  87                                                 video_frame_channel_.push_back(std::move(frame));\r
  88                                         }\r
  89                                         catch(...)\r
  90                                         {\r
  91                                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
  92                                                 video_decoder_.reset();\r
  93                                                 CASPAR_LOG(warning) << print() << " removed video-stream.";\r
  94                                         }\r
  95                                 }\r
  96                         }, \r
  97                         [&] \r
  98                         { // Audio Decoding\r
  99                                 if(!audio_packet.empty() && audio_decoder_)\r
 100                                 {\r
 101                                         try\r
 102                                         {\r
 103                                                 auto chunks = audio_decoder_->execute(audio_packet);\r
 104                                                 audio_chunk_channel_.insert(audio_chunk_channel_.end(), chunks.begin(), chunks.end());\r
 105                                         }\r
 106                                         catch(...)\r
 107                                         {\r
 108                                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
 109                                                 audio_decoder_.reset();\r
 110                                                 CASPAR_LOG(warning) << print() << " removed audio-stream.";\r
 111                                         }\r
 112                                 }\r
 113                         });\r
 114 \r
 115                         while((!video_frame_channel_.empty() || !video_decoder_) && (!audio_chunk_channel_.empty() || !audio_decoder_))\r
 116                         {\r
 117                                 std::shared_ptr<write_frame> frame;\r
 118 \r
 119                                 if(video_decoder_)\r
 120                                 {\r
 121                                         frame = video_frame_channel_.front();\r
 122                                         video_frame_channel_.pop_front();\r
 123                                 }\r
 124 \r
 125                                 if(audio_decoder_) \r
 126                                 {\r
 127                                         if(!frame)\r
 128                                         {\r
 129                                                 frame = frame_factory_->create_frame(1, 1);\r
 130                                                 std::fill(frame->image_data().begin(), frame->image_data().end(), 0);\r
 131                                         }\r
 132                                         \r
 133                                         frame->audio_data() = std::move(audio_chunk_channel_.front());\r
 134                                         audio_chunk_channel_.pop_front();\r
 135                                 }\r
 136                                                         \r
 137                                 ouput_channel_.push(safe_ptr<write_frame>(frame));                              \r
 138                         }                               \r
 139 \r
 140                         if(ouput_channel_.empty() && video_packet.empty() && audio_packet.empty())                      \r
 141                                 return last_frame_;                     \r
 142                 }\r
 143                 \r
 144                 graph_->update("frame_time", static_cast<float>(perf_timer_.elapsed()/frame_factory_->get_video_format_desc().interval*0.5));\r
 145 \r
 146                 auto result = last_frame_;\r
 147                 if(!ouput_channel_.empty())\r
 148                 {\r
 149                         result = std::move(ouput_channel_.front());\r
 150                         last_frame_ = draw_frame(result);\r
 151                         last_frame_->get_audio_transform().set_gain(0.0); // last_frame should not have audio\r
 152                         ouput_channel_.pop();\r
 153                 }\r
 154                 else if(input_.is_eof())\r
 155                         return draw_frame::eof();\r
 156 \r
 157                 return result;\r
 158         }\r
 159 \r
 160         virtual std::wstring print() const\r
 161         {\r
 162                 return L"ffmpeg[" + boost::filesystem::wpath(filename_).filename() + L"]";\r
 163         }\r
 164 };\r
 165 \r
 166 safe_ptr<frame_producer> create_ffmpeg_producer(const std::vector<std::wstring>& params)\r
 167 {                       \r
 168         static const std::vector<std::wstring> extensions = boost::assign::list_of\r
 169                 (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
 170         std::wstring filename = env::media_folder() + L"\\" + params[0];\r
 171         \r
 172         auto ext = std::find_if(extensions.begin(), extensions.end(), [&](const std::wstring& ex) -> bool\r
 173                 {                                       \r
 174                         return boost::filesystem::is_regular_file(boost::filesystem::wpath(filename).replace_extension(ex));\r
 175                 });\r
 176 \r
 177         if(ext == extensions.end())\r
 178                 return frame_producer::empty();\r
 179 \r
 180         std::wstring path = filename + L"." + *ext;\r
 181         bool loop = std::find(params.begin(), params.end(), L"LOOP") != params.end();\r
 182         \r
 183         return make_safe<ffmpeg_producer>(path, loop);\r
 184 }\r
 185 \r
 186 }}}