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 "../../processor/draw_frame.h"\r
  11 \r
  12 #include <common/env.h>\r
  13 \r
  14 #include <tbb/parallel_invoke.h>\r
  15 \r
  16 #include <boost/regex.hpp>\r
  17 \r
  18 #include <deque>\r
  19 \r
  20 using namespace boost::assign;\r
  21 \r
  22 namespace caspar { namespace core { namespace ffmpeg{\r
  23         \r
  24 struct ffmpeg_producer : public frame_producer\r
  25 {\r
  26         input                                                           input_;                 \r
  27         std::unique_ptr<audio_decoder>          audio_decoder_;\r
  28         video_decoder                                           video_decoder_;\r
  29 \r
  30         std::deque<safe_ptr<write_frame>>       video_frame_channel_;   \r
  31         std::deque<std::vector<short>>          audio_chunk_channel_;\r
  32 \r
  33         std::queue<safe_ptr<draw_frame>>        ouput_channel_;\r
  34         \r
  35         const std::wstring                                      filename_;\r
  36         \r
  37         safe_ptr<draw_frame>                            last_frame_;\r
  38 \r
  39         video_format_desc                                       format_desc_;\r
  40 \r
  41 public:\r
  42         explicit ffmpeg_producer(const std::wstring& filename, bool loop, double start_time = 0, double end_time = -1.0) \r
  43                 : filename_(filename)\r
  44                 , last_frame_(draw_frame(draw_frame::empty()))\r
  45                 , input_(filename, loop, start_time, end_time)\r
  46                 , video_decoder_(input_.get_video_codec_context().get())                \r
  47                 , audio_decoder_(input_.get_audio_codec_context().get() ? new audio_decoder(input_.get_audio_codec_context().get(), input_.fps()) : nullptr){}\r
  48 \r
  49         virtual void initialize(const safe_ptr<frame_processor_device>& frame_processor)\r
  50         {\r
  51                 format_desc_ = frame_processor->get_video_format_desc();\r
  52                 video_decoder_.initialize(frame_processor);\r
  53         }\r
  54                 \r
  55         virtual safe_ptr<draw_frame> receive()\r
  56         {\r
  57                 while(ouput_channel_.empty() && !input_.is_eof())\r
  58                 {       \r
  59                         aligned_buffer video_packet;\r
  60                         if(video_frame_channel_.size() < 3)     \r
  61                                 video_packet = input_.get_video_packet();               \r
  62                         \r
  63                         aligned_buffer audio_packet;\r
  64                         if(audio_chunk_channel_.size() < 3)     \r
  65                                 audio_packet = input_.get_audio_packet();               \r
  66 \r
  67                         tbb::parallel_invoke(\r
  68                         [&]\r
  69                         { // Video Decoding and Scaling\r
  70                                 if(!video_packet.empty())\r
  71                                 {\r
  72                                         auto frame = video_decoder_.execute(video_packet);\r
  73                                         video_frame_channel_.push_back(std::move(frame));       \r
  74                                 }\r
  75                         }, \r
  76                         [&] \r
  77                         { // Audio Decoding\r
  78                                 if(!audio_packet.empty() && audio_decoder_)\r
  79                                 {\r
  80                                         try\r
  81                                         {\r
  82                                                 auto chunks = audio_decoder_->execute(audio_packet);\r
  83                                                 audio_chunk_channel_.insert(audio_chunk_channel_.end(), chunks.begin(), chunks.end());\r
  84                                         }\r
  85                                         catch(...)\r
  86                                         {\r
  87                                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
  88                                                 audio_decoder_.reset();\r
  89                                         }\r
  90                                 }\r
  91                         });\r
  92 \r
  93                         while(!video_frame_channel_.empty() && (!audio_chunk_channel_.empty() || !audio_decoder_))\r
  94                         {\r
  95                                 if(audio_decoder_) \r
  96                                 {\r
  97                                         video_frame_channel_.front()->audio_data() = std::move(audio_chunk_channel_.front());\r
  98                                         audio_chunk_channel_.pop_front();\r
  99                                 }\r
 100                                                         \r
 101                                 ouput_channel_.push(video_frame_channel_.front());\r
 102                                 video_frame_channel_.pop_front();\r
 103                         }                               \r
 104 \r
 105                         if(ouput_channel_.empty() && video_packet.empty() && audio_packet.empty())                      \r
 106                                 return last_frame_;                     \r
 107                 }\r
 108 \r
 109                 auto result = last_frame_;\r
 110                 if(!ouput_channel_.empty())\r
 111                 {\r
 112                         result = std::move(ouput_channel_.front());\r
 113                         last_frame_ = draw_frame(result);\r
 114                         last_frame_->audio_volume(0.0); // last_frame should not have audio\r
 115                         ouput_channel_.pop();\r
 116                 }\r
 117                 else if(input_.is_eof())\r
 118                         return draw_frame::eof();\r
 119 \r
 120                 return result;\r
 121         }\r
 122 \r
 123         virtual std::wstring print() const\r
 124         {\r
 125                 return L"ffmpeg[" + boost::filesystem::wpath(filename_).filename() + L"]";\r
 126         }\r
 127 };\r
 128 \r
 129 safe_ptr<frame_producer> create_ffmpeg_producer(const std::vector<std::wstring>& params)\r
 130 {                       \r
 131         static const std::vector<std::wstring> extensions = list_of(L"mpg")(L"avi")(L"mov")(L"dv")(L"wav")(L"mp3")(L"mp4")(L"f4v")(L"flv");\r
 132         std::wstring filename = env::media_folder() + L"\\" + params[0];\r
 133         \r
 134         auto ext = std::find_if(extensions.begin(), extensions.end(), [&](const std::wstring& ex) -> bool\r
 135                 {                                       \r
 136                         return boost::filesystem::is_regular_file(boost::filesystem::wpath(filename).replace_extension(ex));\r
 137                 });\r
 138 \r
 139         if(ext == extensions.end())\r
 140                 return frame_producer::empty();\r
 141 \r
 142         std::wstring path = filename + L"." + *ext;\r
 143         bool loop = std::find(params.begin(), params.end(), L"LOOP") != params.end();\r
 144         \r
 145         static boost::wregex frame_range_expr(L".*\\[(?<START>\\d+\\.?\\d*)(-?(?<END>\\d+\\.?\\d*))?\\].*");\r
 146 \r
 147         double start_time = 0.0;\r
 148         double end_time = -1.0;\r
 149         \r
 150         boost::wsmatch what;\r
 151         if(std::find_if(params.begin(), params.end(), [&](const std::wstring& str){ return boost::regex_match(str, what, frame_range_expr);}) != params.end())\r
 152         {\r
 153                 try{start_time = boost::lexical_cast<double>(what["START"].str());}\r
 154                 catch(boost::bad_lexical_cast&){}\r
 155 \r
 156                 try{end_time = boost::lexical_cast<double>(what["END"].str());}\r
 157                 catch(boost::bad_lexical_cast&){}\r
 158         }\r
 159 \r
 160         return make_safe<ffmpeg_producer>(path, loop, start_time, end_time);\r
 161 }\r
 162 \r
 163 }}}