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