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 #if defined(_MSC_VER)\r
   6 #pragma warning (push)\r
   7 #pragma warning (disable : 4244)\r
   8 #endif\r
   9 \r
  10 extern "C" \r
  11 {\r
  12         #define __STDC_CONSTANT_MACROS\r
  13         #define __STDC_LIMIT_MACROS\r
  14         #include <libavcodec/avcodec.h>\r
  15         #include <libavformat/avformat.h>\r
  16         #include <libavutil/avutil.h>\r
  17         #include <libswscale/swscale.h>\r
  18 }\r
  19 \r
  20 #if defined(_MSC_VER)\r
  21 #pragma warning (pop)\r
  22 #endif\r
  23 \r
  24 #include "input.h"\r
  25 \r
  26 #include "audio/audio_decoder.h"\r
  27 #include "video/video_decoder.h"\r
  28 #include "video/video_decoder.h"\r
  29 \r
  30 #include "../../format/video_format.h"\r
  31 #include "../../processor/draw_frame.h"\r
  32 #include "../../processor/draw_frame.h"\r
  33 \r
  34 #include <tbb/mutex.h>\r
  35 #include <tbb/parallel_invoke.h>\r
  36 #include <tbb/task_group.h>\r
  37 \r
  38 #include <boost/algorithm/string/case_conv.hpp>\r
  39 #include <boost/lexical_cast.hpp>\r
  40 #include <boost/thread.hpp>\r
  41 #include <boost/thread/once.hpp>\r
  42 \r
  43 #include <deque>\r
  44 \r
  45 using namespace boost::assign;\r
  46 \r
  47 namespace caspar { namespace core { namespace ffmpeg{\r
  48         \r
  49 struct ffmpeg_producer_impl\r
  50 {\r
  51 public:\r
  52         ffmpeg_producer_impl(const std::wstring& filename, const  std::vector<std::wstring>& params) : filename_(filename), last_frame_(draw_frame(draw_frame::empty())),\r
  53                 input_(filename), video_decoder_(input_.get_video_codec_context().get()), audio_decoder_(input_.get_audio_codec_context().get())\r
  54         {                               \r
  55                 input_.set_loop(std::find(params.begin(), params.end(), L"LOOP") != params.end());\r
  56 \r
  57                 auto seek = std::find(params.begin(), params.end(), L"SEEK");\r
  58                 if(seek != params.end() && ++seek != params.end())\r
  59                 {\r
  60                         if(!input_.seek(boost::lexical_cast<unsigned long long>(*seek)))\r
  61                                 CASPAR_LOG(warning) << "Failed to seek file: " << filename_  << "to frame" << *seek;\r
  62                 }\r
  63         }\r
  64 \r
  65         void initialize(const safe_ptr<frame_processor_device>& frame_processor)\r
  66         {\r
  67                 format_desc_ = frame_processor->get_video_format_desc();\r
  68                 video_decoder_.initialize(frame_processor);\r
  69         }\r
  70                 \r
  71         safe_ptr<draw_frame> receive()\r
  72         {\r
  73                 while(ouput_channel_.empty() && !input_.is_eof())\r
  74                 {       \r
  75                         aligned_buffer video_packet;\r
  76                         if(video_frame_channel_.size() < 3)     \r
  77                                 video_packet = input_.get_video_packet();               \r
  78                         \r
  79                         aligned_buffer audio_packet;\r
  80                         if(audio_chunk_channel_.size() < 3)     \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())\r
  87                                 {\r
  88                                         auto frame = video_decoder_.execute(video_packet);\r
  89                                         video_frame_channel_.push_back(std::move(frame));       \r
  90                                 }\r
  91                         }, \r
  92                         [&] \r
  93                         { // Audio Decoding\r
  94                                 if(!audio_packet.empty())\r
  95                                 {\r
  96                                         auto chunks = audio_decoder_.execute(audio_packet);\r
  97                                         audio_chunk_channel_.insert(audio_chunk_channel_.end(), chunks.begin(), chunks.end());\r
  98                                 }\r
  99                         });\r
 100 \r
 101                         while(!video_frame_channel_.empty() && (!audio_chunk_channel_.empty() || input_.get_audio_codec_context() == nullptr))\r
 102                         {\r
 103                                 std::vector<short> audio_data;\r
 104                                 if(input_.get_audio_codec_context() != nullptr) \r
 105                                 {\r
 106                                         audio_data = std::move(audio_chunk_channel_.front());\r
 107                                         audio_chunk_channel_.pop_front();\r
 108                                 }\r
 109                                                         \r
 110                                 auto write = std::move(video_frame_channel_.front());\r
 111                                 write->audio_data() = std::move(audio_data);\r
 112                                 auto transform = draw_frame(write);\r
 113                                 video_frame_channel_.pop_front();\r
 114                 \r
 115                                 // TODO: Make generic for all formats and modes.\r
 116                                 if(input_.get_video_codec_context()->codec_id == CODEC_ID_DVVIDEO) // Move up one field         \r
 117                                         transform.translate(0.0f, 1.0/static_cast<double>(format_desc_.height));        \r
 118                                 \r
 119                                 ouput_channel_.push(std::move(transform));\r
 120                         }                               \r
 121 \r
 122                         if(ouput_channel_.empty() && video_packet.empty() && audio_packet.empty())                      \r
 123                                 return last_frame_;                     \r
 124                 }\r
 125 \r
 126                 auto result = last_frame_;\r
 127                 if(!ouput_channel_.empty())\r
 128                 {\r
 129                         result = std::move(ouput_channel_.front());\r
 130                         last_frame_ = draw_frame(result);\r
 131                         last_frame_->audio_volume(0.0); // last_frame should not have audio\r
 132                         ouput_channel_.pop();\r
 133                 }\r
 134                 else if(input_.is_eof())\r
 135                         return draw_frame::eof();\r
 136 \r
 137                 return result;\r
 138         }\r
 139 \r
 140         std::wstring print() const\r
 141         {\r
 142                 return L"ffmpeg[" + boost::filesystem::wpath(filename_).filename() + L"]";\r
 143         }\r
 144 \r
 145         input                                                           input_;                 \r
 146         audio_decoder                                           audio_decoder_;\r
 147         video_decoder                                           video_decoder_;\r
 148 \r
 149         std::deque<safe_ptr<write_frame>>       video_frame_channel_;   \r
 150         std::deque<std::vector<short>>          audio_chunk_channel_;\r
 151 \r
 152         std::queue<safe_ptr<draw_frame>>        ouput_channel_;\r
 153         \r
 154         const std::wstring                                      filename_;\r
 155         \r
 156         safe_ptr<draw_frame>                            last_frame_;\r
 157 \r
 158         video_format_desc                                       format_desc_;\r
 159 };\r
 160 \r
 161 class ffmpeg_producer : public frame_producer\r
 162 {\r
 163 public:\r
 164         ffmpeg_producer(const std::wstring& filename, const  std::vector<std::wstring>& params) : impl_(new ffmpeg_producer_impl(filename, params)){}\r
 165         ffmpeg_producer(ffmpeg_producer&& other) : impl_(std::move(other.impl_)){}\r
 166         virtual safe_ptr<draw_frame> receive(){return impl_->receive();}\r
 167         virtual void initialize(const safe_ptr<frame_processor_device>& frame_processor){impl_->initialize(frame_processor);}\r
 168         virtual std::wstring print() const{return impl_->print();}\r
 169 private:\r
 170         std::shared_ptr<ffmpeg_producer_impl> impl_;\r
 171 };\r
 172 \r
 173 safe_ptr<frame_producer> create_ffmpeg_producer(const std::vector<std::wstring>& params)\r
 174 {                       \r
 175         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
 176         std::wstring filename = params[0];\r
 177         \r
 178         auto ext = std::find_if(extensions.begin(), extensions.end(), [&](const std::wstring& ex) -> bool\r
 179                 {                                       \r
 180                         return boost::filesystem::is_regular_file(boost::filesystem::wpath(filename).replace_extension(ex));\r
 181                 });\r
 182 \r
 183         if(ext == extensions.end())\r
 184                 return frame_producer::empty();\r
 185                 \r
 186         static boost::once_flag av_register_all_flag = BOOST_ONCE_INIT;\r
 187         boost::call_once(av_register_all, av_register_all_flag);        \r
 188                 \r
 189         static boost::once_flag avcodec_init_flag = BOOST_ONCE_INIT;\r
 190         boost::call_once(avcodec_init, avcodec_init_flag);      \r
 191 \r
 192         return make_safe<ffmpeg_producer>(filename + L"." + *ext, params);\r
 193 }\r
 194 \r
 195 }}}