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 "../../video_format.h"\r
  10 #include "../../mixer/frame/draw_frame.h"\r
  11 #include "../../mixer/audio/audio_mixer.h"\r
  12 \r
  13 #include <common/env.h>\r
  14 \r
  15 #include <tbb/parallel_invoke.h>\r
  16 \r
  17 #include <deque>\r
  18 \r
  19 namespace caspar { namespace core { namespace ffmpeg{\r
  20         \r
  21 struct ffmpeg_producer : public frame_producer\r
  22 {\r
  23         input                                                           input_;                 \r
  24         std::unique_ptr<audio_decoder>          audio_decoder_;\r
  25         video_decoder                                           video_decoder_;\r
  26 \r
  27         std::deque<safe_ptr<write_frame>>       video_frame_channel_;   \r
  28         std::deque<std::vector<short>>          audio_chunk_channel_;\r
  29 \r
  30         std::queue<safe_ptr<draw_frame>>        ouput_channel_;\r
  31         \r
  32         const std::wstring                                      filename_;\r
  33         \r
  34         safe_ptr<draw_frame>                            last_frame_;\r
  35 \r
  36         video_format_desc                                       format_desc_;\r
  37 \r
  38 public:\r
  39         explicit ffmpeg_producer(const std::wstring& filename, bool loop) \r
  40                 : filename_(filename)\r
  41                 , last_frame_(draw_frame(draw_frame::empty()))\r
  42                 , input_(filename, loop)\r
  43                 , video_decoder_(input_.get_video_codec_context().get())                \r
  44                 , audio_decoder_(input_.get_audio_codec_context().get() ? new audio_decoder(input_.get_audio_codec_context().get(), input_.fps()) : nullptr){}\r
  45 \r
  46         virtual void initialize(const safe_ptr<frame_factory>& frame_factory)\r
  47         {\r
  48                 format_desc_ = frame_factory->get_video_format_desc();\r
  49                 video_decoder_.initialize(frame_factory);\r
  50         }\r
  51                 \r
  52         virtual safe_ptr<draw_frame> receive()\r
  53         {\r
  54                 while(ouput_channel_.empty() && !input_.is_eof())\r
  55                 {       \r
  56                         aligned_buffer video_packet;\r
  57                         if(video_frame_channel_.size() < 3)     \r
  58                                 video_packet = input_.get_video_packet();               \r
  59                         \r
  60                         aligned_buffer audio_packet;\r
  61                         if(audio_chunk_channel_.size() < 3)     \r
  62                                 audio_packet = input_.get_audio_packet();               \r
  63 \r
  64                         tbb::parallel_invoke(\r
  65                         [&]\r
  66                         { // Video Decoding and Scaling\r
  67                                 if(!video_packet.empty())\r
  68                                 {\r
  69                                         auto frame = video_decoder_.execute(video_packet);\r
  70                                         video_frame_channel_.push_back(std::move(frame));\r
  71                                 }\r
  72                         }, \r
  73                         [&] \r
  74                         { // Audio Decoding\r
  75                                 if(!audio_packet.empty() && audio_decoder_)\r
  76                                 {\r
  77                                         try\r
  78                                         {\r
  79                                                 auto chunks = audio_decoder_->execute(audio_packet);\r
  80                                                 audio_chunk_channel_.insert(audio_chunk_channel_.end(), chunks.begin(), chunks.end());\r
  81                                         }\r
  82                                         catch(...)\r
  83                                         {\r
  84                                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
  85                                                 audio_decoder_.reset();\r
  86                                         }\r
  87                                 }\r
  88                         });\r
  89 \r
  90                         while(!video_frame_channel_.empty() && (!audio_chunk_channel_.empty() || !audio_decoder_))\r
  91                         {\r
  92                                 if(audio_decoder_) \r
  93                                 {\r
  94                                         video_frame_channel_.front()->audio_data() = std::move(audio_chunk_channel_.front());\r
  95                                         audio_chunk_channel_.pop_front();\r
  96                                 }\r
  97                                                         \r
  98                                 ouput_channel_.push(std::move(video_frame_channel_.front()));\r
  99                                 video_frame_channel_.pop_front();\r
 100                         }                               \r
 101 \r
 102                         if(ouput_channel_.empty() && video_packet.empty() && audio_packet.empty())                      \r
 103                                 return last_frame_;                     \r
 104                 }\r
 105 \r
 106                 auto result = last_frame_;\r
 107                 if(!ouput_channel_.empty())\r
 108                 {\r
 109                         result = std::move(ouput_channel_.front());\r
 110                         last_frame_ = draw_frame(result);\r
 111                         last_frame_->get_audio_transform().gain = 0.0; // last_frame should not have audio\r
 112                         ouput_channel_.pop();\r
 113                 }\r
 114                 else if(input_.is_eof())\r
 115                         return draw_frame::eof();\r
 116 \r
 117                 return result;\r
 118         }\r
 119 \r
 120         virtual std::wstring print() const\r
 121         {\r
 122                 return L"ffmpeg[" + boost::filesystem::wpath(filename_).filename() + L"]";\r
 123         }\r
 124 };\r
 125 \r
 126 safe_ptr<frame_producer> create_ffmpeg_producer(const std::vector<std::wstring>& params)\r
 127 {                       \r
 128         static const std::vector<std::wstring> extensions = boost::assign::list_of(L"mpg")(L"avi")(L"mov")(L"dv")(L"wav")(L"mp3")(L"mp4")(L"f4v")(L"flv");\r
 129         std::wstring filename = env::media_folder() + L"\\" + params[0];\r
 130         \r
 131         auto ext = std::find_if(extensions.begin(), extensions.end(), [&](const std::wstring& ex) -> bool\r
 132                 {                                       \r
 133                         return boost::filesystem::is_regular_file(boost::filesystem::wpath(filename).replace_extension(ex));\r
 134                 });\r
 135 \r
 136         if(ext == extensions.end())\r
 137                 return frame_producer::empty();\r
 138 \r
 139         std::wstring path = filename + L"." + *ext;\r
 140         bool loop = std::find(params.begin(), params.end(), L"LOOP") != params.end();\r
 141         \r
 142         return make_safe<ffmpeg_producer>(path, loop);\r
 143 }\r
 144 \r
 145 }}}