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 "../../video/video_format.h"\r
  31 #include "../../../common/utility/find_file.h"\r
  32 #include "../../../common/utility/memory.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 : public frame_producer\r
  50 {\r
  51 public:\r
  52         ffmpeg_producer(const std::wstring& filename, const  std::vector<std::wstring>& params) \r
  53                 : filename_(filename)\r
  54         {\r
  55                 if(!boost::filesystem::exists(filename))\r
  56                         BOOST_THROW_EXCEPTION(file_not_found() <<  boost::errinfo_file_name(common::narrow(filename)));\r
  57                 \r
  58                 static boost::once_flag flag = BOOST_ONCE_INIT;\r
  59                 boost::call_once(av_register_all, flag);        \r
  60                                 \r
  61                 input_.reset(new input());\r
  62                 input_->set_loop(std::find(params.begin(), params.end(), L"LOOP") != params.end());\r
  63                 input_->load(common::narrow(filename_));\r
  64                 video_decoder_.reset(new video_decoder(input_->get_video_codec_context().get()));\r
  65                 video_transformer_.reset(new video_transformer(input_->get_video_codec_context().get()));\r
  66                 audio_decoder_.reset(new audio_decoder(input_->get_audio_codec_context().get()));\r
  67                 has_audio_ = input_->get_audio_codec_context() != nullptr;\r
  68 \r
  69                 auto seek = std::find(params.begin(), params.end(), L"SEEK");\r
  70                 if(seek != params.end() && ++seek != params.end())\r
  71                 {\r
  72                         if(!input_->seek(boost::lexical_cast<unsigned long long>(*seek)))\r
  73                                 CASPAR_LOG(warning) << "Failed to seek file: " << filename_  << "to frame" << *seek;\r
  74                 }\r
  75 \r
  76                 input_->start();\r
  77         }\r
  78                 \r
  79         void initialize(const frame_processor_device_ptr& frame_processor)\r
  80         {\r
  81                 video_transformer_->initialize(frame_processor);\r
  82         }\r
  83                 \r
  84         frame_ptr render_frame()\r
  85         {\r
  86                 while(ouput_channel_.empty() && !input_->is_eof())\r
  87                 {                                                                               \r
  88                         tbb::parallel_invoke(\r
  89                         [&]\r
  90                         { // Video Decoding and Scaling\r
  91                                 auto video_packet = input_->get_video_packet();\r
  92                                 if(!video_packet.empty())\r
  93                                 {\r
  94                                         auto decoded_frame = video_decoder_->execute(video_packet);\r
  95                                         auto transformed_frame = video_transformer_->execute(decoded_frame);\r
  96                                         video_frame_channel_.push_back(transformed_frame);      \r
  97                                 }\r
  98                         }, \r
  99                         [&] \r
 100                         { // Audio Decoding\r
 101                                 auto audio_packet = input_->get_audio_packet();\r
 102                                 if(!audio_packet.empty())\r
 103                                 {\r
 104                                         auto chunks = audio_decoder_->execute(audio_packet);\r
 105                                         audio_chunk_channel_.insert(audio_chunk_channel_.end(), chunks.begin(), chunks.end());\r
 106                                 }\r
 107                         });\r
 108 \r
 109                         while(!video_frame_channel_.empty() && (!audio_chunk_channel_.empty() || !has_audio_))\r
 110                         {\r
 111                                 if(has_audio_)\r
 112                                 {\r
 113                                         video_frame_channel_.front()->audio_data() = std::move(audio_chunk_channel_.front());\r
 114                                         audio_chunk_channel_.pop_front();\r
 115                                 }\r
 116                                 \r
 117                                 frame_ptr frame = video_frame_channel_.front();\r
 118                                 video_frame_channel_.pop_front();\r
 119                                 ouput_channel_.push(std::move(frame));\r
 120                         }                               \r
 121                 }\r
 122 \r
 123                 frame_ptr frame;\r
 124                 if(!ouput_channel_.empty())\r
 125                 {\r
 126                         frame = ouput_channel_.front();\r
 127                         ouput_channel_.pop();\r
 128                 }\r
 129                 return frame;\r
 130         }\r
 131                         \r
 132         bool has_audio_;\r
 133 \r
 134         // Filter 1 : Input\r
 135         input_uptr                                                      input_;         \r
 136 \r
 137         // Filter 2 : Video Decoding and Scaling\r
 138         video_decoder_uptr                                      video_decoder_;\r
 139         video_transformer_uptr                          video_transformer_;\r
 140         //std::deque<video_packet_ptr>          videoDecodedPacketChannel_;\r
 141         std::deque<frame_ptr>                                   video_frame_channel_;\r
 142         \r
 143         // Filter 3 : Audio Decoding\r
 144         audio_decoder_ptr                                       audio_decoder_;\r
 145         std::deque<std::vector<short>>          audio_chunk_channel_;\r
 146 \r
 147         // Filter 4 : Merge Video and Audio\r
 148         std::queue<frame_ptr>                   ouput_channel_;\r
 149         \r
 150         std::wstring                                            filename_;\r
 151 };\r
 152 \r
 153 frame_producer_ptr create_ffmpeg_producer(const  std::vector<std::wstring>& params)\r
 154 {\r
 155         std::wstring filename = params[0];\r
 156         std::wstring result_filename = common::find_file(server::media_folder() + filename, list_of(L"mpg")(L"avi")(L"mov")(L"dv")(L"wav")(L"mp3")(L"mp4")(L"f4v")(L"flv"));\r
 157         if(result_filename.empty())\r
 158                 return nullptr;\r
 159 \r
 160         return std::make_shared<ffmpeg_producer>(result_filename, params);\r
 161 }\r
 162 \r
 163 }}}