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_deinterlacer.h"\r
  29 #include "video/video_transformer.h"\r
  30 \r
  31 #include "../../frame/frame_format.h"\r
  32 #include "../../../common/utility/find_file.h"\r
  33 #include "../../server.h"\r
  34 #include "../../../common/utility/memory.h"\r
  35 #include "../../../common/utility/scope_exit.h"\r
  36 \r
  37 #include <tbb/mutex.h>\r
  38 #include <tbb/parallel_invoke.h>\r
  39 #include <tbb/task_group.h>\r
  40 \r
  41 #include <boost/algorithm/string/case_conv.hpp>\r
  42 #include <boost/lexical_cast.hpp>\r
  43 #include <boost/thread.hpp>\r
  44 #include <boost/thread/once.hpp>\r
  45 \r
  46 using namespace boost::assign;\r
  47 \r
  48 namespace caspar{ namespace ffmpeg{\r
  49         \r
  50 struct ffmpeg_producer : public frame_producer\r
  51 {\r
  52 public:\r
  53         static const size_t MAX_TOKENS = 5;\r
  54         static const size_t MIN_BUFFER_SIZE = 2;\r
  55         static const size_t DEFAULT_BUFFER_SIZE = 8;\r
  56         static const size_t MAX_BUFFER_SIZE = 64;\r
  57         static const size_t LOAD_TARGET_BUFFER_SIZE = 4;\r
  58         static const size_t THREAD_TIMEOUT_MS = 1000;\r
  59 \r
  60         ffmpeg_producer(const std::wstring& filename, const  std::vector<std::wstring>& params, const frame_format_desc& format_desc) \r
  61                 : filename_(filename), format_desc_(format_desc)\r
  62         {\r
  63         if(!boost::filesystem::exists(filename))\r
  64                 BOOST_THROW_EXCEPTION(file_not_found() <<  boost::errinfo_file_name(common::narrow(filename)));\r
  65                 \r
  66                 static boost::once_flag flag = BOOST_ONCE_INIT;\r
  67                 boost::call_once(av_register_all, flag);        \r
  68                                 \r
  69                 input_.reset(new input(format_desc_));\r
  70                 input_->set_loop(std::find(params.begin(), params.end(), L"LOOP") != params.end());\r
  71                 input_->load(common::narrow(filename_));\r
  72                 video_decoder_.reset(new video_decoder());\r
  73                 video_transformer_.reset(new video_transformer());\r
  74                 audio_decoder_.reset(new audio_decoder());\r
  75                 has_audio_ = input_->get_audio_codec_context() != nullptr;\r
  76         }\r
  77                 \r
  78         void initialize(const frame_factory_ptr& factory)\r
  79         {\r
  80                 video_transformer_->initialize(factory);\r
  81         }\r
  82                 \r
  83         gpu_frame_ptr get_frame()\r
  84         {\r
  85                 while(ouput_channel_.empty() && !input_->is_eof())\r
  86                 {                                                                               \r
  87                         tbb::parallel_invoke(\r
  88                         [&]\r
  89                         { // Video Decoding and Scaling\r
  90                                 auto video_packet = input_->get_video_packet();\r
  91                                 if(video_packet)\r
  92                                 {\r
  93                                         video_packet = video_decoder_->execute(video_packet);\r
  94                                         auto frame = video_transformer_->execute(video_packet)->frame;\r
  95                                         video_frame_channel_.push_back(std::move(frame));       \r
  96                                 }\r
  97                         }, \r
  98                         [&] \r
  99                         { // Audio Decoding\r
 100                                 auto audio_packet = input_->get_audio_packet();\r
 101                                 if(audio_packet)\r
 102                                 {\r
 103                                         audio_decoder_->execute(audio_packet);\r
 104                                         for(size_t n = 0; n < audio_packet->audio_chunks.size(); ++n)\r
 105                                                 audio_chunk_channel_.push_back(std::move(audio_packet->audio_chunks[n]));\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                                 gpu_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                 gpu_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         const frame_format_desc& get_frame_format_desc() const { return format_desc_; }\r
 133                 \r
 134         bool has_audio_;\r
 135 \r
 136         // Filter 1 : Input\r
 137         input_uptr                                                      input_;         \r
 138 \r
 139         // Filter 2 : Video Decoding and Scaling\r
 140         video_decoder_uptr                                      video_decoder_;\r
 141         video_transformer_uptr                          video_transformer_;\r
 142         //std::deque<video_packet_ptr>          videoDecodedPacketChannel_;\r
 143         std::deque<gpu_frame_ptr>                       video_frame_channel_;\r
 144         \r
 145         // Filter 3 : Audio Decoding\r
 146         audio_decoder_uptr                                      audio_decoder_;\r
 147         std::deque<std::vector<short>>          audio_chunk_channel_;\r
 148 \r
 149         // Filter 4 : Merge Video and Audio\r
 150         std::queue<gpu_frame_ptr>                       ouput_channel_;\r
 151         \r
 152         std::wstring                                            filename_;\r
 153         frame_format_desc                                       format_desc_;\r
 154 };\r
 155 \r
 156 frame_producer_ptr create_ffmpeg_producer(const  std::vector<std::wstring>& params, const frame_format_desc& format_desc)\r
 157 {\r
 158         std::wstring filename = params[0];\r
 159         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
 160         if(result_filename.empty())\r
 161                 return nullptr;\r
 162 \r
 163         return std::make_shared<ffmpeg_producer>(result_filename, params, format_desc);\r
 164 }\r
 165 \r
 166 }}