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_transformer.h"\r
  29 \r
  30 #include "../../format/video_format.h"\r
  31 #include "../../processor/transform_frame.h"\r
  32 #include "../../processor/draw_frame.h"\r
  33 #include "../../../common/utility/scope_exit.h"\r
  34 #include "../../server.h"\r
  35 \r
  36 #include <tbb/mutex.h>\r
  37 #include <tbb/parallel_invoke.h>\r
  38 #include <tbb/task_group.h>\r
  39 \r
  40 #include <boost/algorithm/string/case_conv.hpp>\r
  41 #include <boost/lexical_cast.hpp>\r
  42 #include <boost/thread.hpp>\r
  43 #include <boost/thread/once.hpp>\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), underrun_count_(0), last_frame_(transform_frame(draw_frame::empty()))\r
  53         {\r
  54                 if(!boost::filesystem::exists(filename))\r
  55                         BOOST_THROW_EXCEPTION(file_not_found() <<  boost::errinfo_file_name(narrow(filename)));\r
  56                 \r
  57                 static boost::once_flag av_register_all_flag = BOOST_ONCE_INIT;\r
  58                 boost::call_once(av_register_all, av_register_all_flag);        \r
  59                 \r
  60                 static boost::once_flag avcodec_init_flag = BOOST_ONCE_INIT;\r
  61                 boost::call_once(avcodec_init, avcodec_init_flag);      \r
  62                                 \r
  63                 input_.reset(new input());\r
  64                 input_->set_loop(std::find(params.begin(), params.end(), L"LOOP") != params.end());\r
  65                 input_->load(narrow(filename_));\r
  66                 video_decoder_.reset(new video_decoder(input_->get_video_codec_context().get()));\r
  67                 video_transformer_.reset(new video_transformer(input_->get_video_codec_context().get()));\r
  68                 audio_decoder_.reset(new audio_decoder(input_->get_audio_codec_context().get()));\r
  69                 has_audio_ = input_->get_audio_codec_context() != nullptr;\r
  70 \r
  71                 auto seek = std::find(params.begin(), params.end(), L"SEEK");\r
  72                 if(seek != params.end() && ++seek != params.end())\r
  73                 {\r
  74                         if(!input_->seek(boost::lexical_cast<unsigned long long>(*seek)))\r
  75                                 CASPAR_LOG(warning) << "Failed to seek file: " << filename_  << "to frame" << *seek;\r
  76                 }\r
  77         }\r
  78                 \r
  79         void initialize(const safe_ptr<frame_processor_device>& frame_processor)\r
  80         {\r
  81                 format_desc_ = frame_processor->get_video_format_desc();\r
  82                 video_transformer_->initialize(frame_processor);\r
  83         }\r
  84                 \r
  85         safe_ptr<draw_frame> receive()\r
  86         {\r
  87                 while(ouput_channel_.empty() && !input_->is_eof())\r
  88                 {       \r
  89                         auto video_packet = input_->get_video_packet();         \r
  90                         auto audio_packet = input_->get_audio_packet();         \r
  91                         tbb::parallel_invoke(\r
  92                         [&]\r
  93                         { // Video Decoding and Scaling\r
  94                                 if(!video_packet.empty())\r
  95                                 {\r
  96                                         auto decoded_frame = video_decoder_->execute(video_packet);\r
  97                                         auto frame = video_transformer_->execute(decoded_frame);\r
  98                                         video_frame_channel_.push_back(std::move(frame));       \r
  99                                 }\r
 100                         }, \r
 101                         [&] \r
 102                         { // Audio Decoding\r
 103                                 if(!audio_packet.empty())\r
 104                                 {\r
 105                                         auto chunks = audio_decoder_->execute(audio_packet);\r
 106                                         audio_chunk_channel_.insert(audio_chunk_channel_.end(), chunks.begin(), chunks.end());\r
 107                                 }\r
 108                         });\r
 109 \r
 110                         while(!video_frame_channel_.empty() && (!audio_chunk_channel_.empty() || !has_audio_))\r
 111                         {\r
 112                                 std::vector<short> audio_data;\r
 113                                 if(has_audio_) \r
 114                                 {\r
 115                                         audio_data = std::move(audio_chunk_channel_.front());\r
 116                                         audio_chunk_channel_.pop_front();\r
 117                                 }\r
 118                                                         \r
 119                                 auto write = std::move(video_frame_channel_.front());\r
 120                                 write->audio_data() = std::move(audio_data);\r
 121                                 auto transform = transform_frame(write);\r
 122                                 video_frame_channel_.pop_front();\r
 123                 \r
 124                                 // TODO: Make generic for all formats and modes.\r
 125                                 if(input_->get_video_codec_context()->codec_id == CODEC_ID_DVVIDEO) // Move up one field                \r
 126                                         transform.translate(0.0f, 1.0/static_cast<double>(format_desc_.height));        \r
 127                                 \r
 128                                 ouput_channel_.push(std::move(transform));\r
 129                         }                               \r
 130 \r
 131                         if(ouput_channel_.empty() && video_packet.empty() && audio_packet.empty())\r
 132                         {\r
 133                                 if(underrun_count_++ == 0)\r
 134                                         CASPAR_LOG(warning) << "### File read underflow has STARTED.";\r
 135 \r
 136                                 return last_frame_;\r
 137                         }\r
 138                         else if(underrun_count_ > 0)\r
 139                         {\r
 140                                 CASPAR_LOG(trace) << "### File Read Underrun has ENDED with " << underrun_count_ << " ticks.";\r
 141                                 underrun_count_ = 0;\r
 142                         }\r
 143                 }\r
 144 \r
 145                 auto result = last_frame_;\r
 146                 if(!ouput_channel_.empty())\r
 147                 {\r
 148                         result = std::move(ouput_channel_.front());\r
 149                         last_frame_ = transform_frame(result);\r
 150                         last_frame_->audio_volume(0.0); // last_frame should not have audio\r
 151                         ouput_channel_.pop();\r
 152                 }\r
 153                 else if(input_->is_eof())\r
 154                         return draw_frame::eof();\r
 155 \r
 156                 return result;\r
 157         }\r
 158 \r
 159         std::wstring print() const\r
 160         {\r
 161                 return L"ffmpeg_producer. filename " + filename_;\r
 162         }\r
 163                         \r
 164         bool has_audio_;\r
 165 \r
 166         input_uptr                                                              input_;         \r
 167 \r
 168         video_decoder_uptr                                              video_decoder_;\r
 169         video_transformer_uptr                                  video_transformer_;\r
 170         std::deque<safe_ptr<write_frame>>               video_frame_channel_;\r
 171         \r
 172         audio_decoder_ptr                                               audio_decoder_;\r
 173         std::deque<std::vector<short>>                  audio_chunk_channel_;\r
 174 \r
 175         std::queue<safe_ptr<transform_frame>>   ouput_channel_;\r
 176         \r
 177         std::wstring                                                    filename_;\r
 178 \r
 179         long                                                                    underrun_count_;\r
 180 \r
 181         safe_ptr<transform_frame>                               last_frame_;\r
 182 \r
 183         video_format_desc                                               format_desc_;\r
 184 };\r
 185 \r
 186 class ffmpeg_producer : public frame_producer\r
 187 {\r
 188 public:\r
 189         ffmpeg_producer(const std::wstring& filename, const  std::vector<std::wstring>& params) : impl_(new ffmpeg_producer_impl(filename, params)){}\r
 190         ffmpeg_producer(ffmpeg_producer&& other) : impl_(std::move(other.impl_)){}\r
 191         virtual safe_ptr<draw_frame> receive(){return impl_->receive();}\r
 192         virtual void initialize(const safe_ptr<frame_processor_device>& frame_processor){impl_->initialize(frame_processor);}\r
 193         virtual std::wstring print() const{return impl_->print();}\r
 194 private:\r
 195         std::shared_ptr<ffmpeg_producer_impl> impl_;\r
 196 };\r
 197 \r
 198 safe_ptr<frame_producer> create_ffmpeg_producer(const  std::vector<std::wstring>& params)\r
 199 {       \r
 200         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
 201         std::wstring filename = server::media_folder() + L"\\" + params[0];\r
 202         \r
 203         auto ext = std::find_if(extensions.begin(), extensions.end(), [&](const std::wstring& ex) -> bool\r
 204                 {                                       \r
 205                         return boost::filesystem::is_regular_file(boost::filesystem::wpath(filename).replace_extension(ex));\r
 206                 });\r
 207 \r
 208         if(ext == extensions.end())\r
 209                 return frame_producer::empty();\r
 210 \r
 211         return make_safe<ffmpeg_producer>(filename + L"." + *ext, params);\r
 212 }\r
 213 \r
 214 }}}