git.sesse.net Git - casparcg/blob - modules/ffmpeg/producer/ffmpeg_producer.cpp

   1 /*\r
   2 * copyright (c) 2010 Sveriges Television AB <info@casparcg.com>\r
   3 *\r
   4 *  This file is part of CasparCG.\r
   5 *\r
   6 *    CasparCG is free software: you can redistribute it and/or modify\r
   7 *    it under the terms of the GNU General Public License as published by\r
   8 *    the Free Software Foundation, either version 3 of the License, or\r
   9 *    (at your option) any later version.\r
  10 *\r
  11 *    CasparCG is distributed in the hope that it will be useful,\r
  12 *    but WITHOUT ANY WARRANTY; without even the implied warranty of\r
  13 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
  14 *    GNU General Public License for more details.\r
  15 \r
  16 *    You should have received a copy of the GNU General Public License\r
  17 *    along with CasparCG.  If not, see <http://www.gnu.org/licenses/>.\r
  18 *\r
  19 */\r
  20 #include "../stdafx.h"\r
  21 \r
  22 #include "ffmpeg_producer.h"\r
  23 \r
  24 #include "frame_muxer.h"\r
  25 #include "input.h"\r
  26 #include "util.h"\r
  27 #include "audio/audio_decoder.h"\r
  28 #include "video/video_decoder.h"\r
  29 \r
  30 #include <common/env.h>\r
  31 #include <common/utility/assert.h>\r
  32 #include <common/diagnostics/graph.h>\r
  33 \r
  34 #include <core/video_format.h>\r
  35 #include <core/producer/frame_producer.h>\r
  36 #include <core/producer/frame/frame_factory.h>\r
  37 #include <core/producer/frame/basic_frame.h>\r
  38 \r
  39 #include <boost/assign.hpp>\r
  40 #include <boost/timer.hpp>\r
  41 #include <boost/foreach.hpp>\r
  42 #include <boost/filesystem.hpp>\r
  43 #include <boost/range/algorithm/find_if.hpp>\r
  44 #include <boost/range/algorithm/find.hpp>\r
  45 \r
  46 #include <tbb/parallel_invoke.h>\r
  47 \r
  48 namespace caspar {\r
  49 \r
  50 double validate_fps(double fps, int64_t nb_frames, double duration_sec)\r
  51 {\r
  52         if(fps > 20.0 && fps < 80.0)\r
  53                 return fps;\r
  54         \r
  55         auto est_fps = nb_frames/duration_sec;\r
  56 \r
  57         CASPAR_LOG(warning) << L"Invalid framerate detected, trying to estimate, fps: " << fps << L" nb_frames: " << nb_frames << L" duration_sec: " << duration_sec << L" => " << est_fps << L" fps.";\r
  58 \r
  59         return est_fps;\r
  60 }\r
  61                         \r
  62 struct ffmpeg_producer : public core::frame_producer\r
  63 {\r
  64         const std::wstring                                                              filename_;\r
  65         \r
  66         const safe_ptr<diagnostics::graph>                              graph_;\r
  67         boost::timer                                                                    frame_timer_;\r
  68         boost::timer                                                                    video_timer_;\r
  69         boost::timer                                                                    audio_timer_;\r
  70                                         \r
  71         const safe_ptr<core::frame_factory>                             frame_factory_;\r
  72         const core::video_format_desc                                   format_desc_;\r
  73 \r
  74         input                                                                                   input_; \r
  75         video_decoder                                                                   video_decoder_;\r
  76         audio_decoder                                                                   audio_decoder_; \r
  77         frame_muxer                                                                             muxer_;\r
  78 \r
  79         int                                                                                             late_frames_;\r
  80         const int                                                                               start_;\r
  81         const bool                                                                              loop_;\r
  82 \r
  83         safe_ptr<core::basic_frame>                                             last_frame_;\r
  84         bool                                                                                    eof_;\r
  85         \r
  86 public:\r
  87         explicit ffmpeg_producer(const safe_ptr<core::frame_factory>& frame_factory, const std::wstring& filename, const std::wstring& filter, bool loop, int start, int length) \r
  88                 : filename_(filename)\r
  89                 , graph_(diagnostics::create_graph(narrow(print())))\r
  90                 , frame_factory_(frame_factory)         \r
  91                 , format_desc_(frame_factory->get_video_format_desc())\r
  92                 , input_(graph_, filename_, loop, start, length)\r
  93                 , video_decoder_(input_.context(), frame_factory, filter)\r
  94                 , audio_decoder_(input_.context(), frame_factory->get_video_format_desc())\r
  95                 , muxer_(validate_fps(video_decoder_.fps(), video_decoder_.nb_frames(), audio_decoder_.duration()), frame_factory)\r
  96                 , late_frames_(0)\r
  97                 , start_(start)\r
  98                 , loop_(loop)\r
  99                 , last_frame_(core::basic_frame::empty())\r
 100                 , eof_(false)\r
 101         {\r
 102                 graph_->add_guide("frame-time", 0.5);\r
 103                 graph_->set_color("frame-time", diagnostics::color(1.0f, 0.0f, 0.0f));\r
 104                 graph_->set_color("underflow", diagnostics::color(0.6f, 0.3f, 0.9f));           \r
 105                 \r
 106                 for(int n = 0; n < 32 && muxer_.empty(); ++n)\r
 107                         decode_frame(0);\r
 108         }\r
 109                         \r
 110         virtual safe_ptr<core::basic_frame> receive(int hints)\r
 111         {\r
 112                 if(eof_)\r
 113                         return last_frame();\r
 114 \r
 115                 auto frame = core::basic_frame::late();\r
 116                 \r
 117                 frame_timer_.restart();\r
 118                 \r
 119                 for(int n = 0; n < 64 && muxer_.empty(); ++n)\r
 120                         decode_frame(hints);\r
 121                 \r
 122                 graph_->update_value("frame-time", static_cast<float>(frame_timer_.elapsed()*format_desc_.fps*0.5));\r
 123 \r
 124                 if(!muxer_.empty())\r
 125                         frame = last_frame_ = muxer_.pop();     \r
 126                 else\r
 127                 {\r
 128                         if(input_.eof())\r
 129                         {\r
 130                                 eof_ = true;\r
 131                                 return last_frame();\r
 132                         }\r
 133                         else\r
 134                         {\r
 135                                 graph_->add_tag("underflow");   \r
 136                                 ++late_frames_;         \r
 137                         }\r
 138                 }\r
 139                 \r
 140                 return frame;\r
 141         }\r
 142 \r
 143         virtual safe_ptr<core::basic_frame> last_frame() const\r
 144         {\r
 145                 return disable_audio(last_frame_);\r
 146         }\r
 147 \r
 148         void decode_frame(int hints)\r
 149         {\r
 150                 for(int n = 0; n < 16 && ((!muxer_.video_ready() && !video_decoder_.ready()) || (!muxer_.audio_ready() && !audio_decoder_.ready())); ++n) \r
 151                 {\r
 152                         std::shared_ptr<AVPacket> pkt;\r
 153                         if(input_.try_pop(pkt))\r
 154                         {\r
 155                                 video_decoder_.push(pkt);\r
 156                                 audio_decoder_.push(pkt);\r
 157                         }\r
 158                 }\r
 159                 \r
 160                 tbb::parallel_invoke(\r
 161                 [&]\r
 162                 {\r
 163                         if(muxer_.video_ready())\r
 164                                 return;\r
 165 \r
 166                         auto video_frames = video_decoder_.poll();\r
 167                         BOOST_FOREACH(auto& video, video_frames)                \r
 168                                 muxer_.push(video, hints);      \r
 169                 },\r
 170                 [&]\r
 171                 {\r
 172                         if(muxer_.audio_ready())\r
 173                                 return;\r
 174                                         \r
 175                         auto audio_samples = audio_decoder_.poll();\r
 176                         BOOST_FOREACH(auto& audio, audio_samples)\r
 177                                 muxer_.push(audio);                             \r
 178                 });\r
 179 \r
 180                 muxer_.commit();\r
 181         }\r
 182 \r
 183         virtual int64_t nb_frames() const \r
 184         {\r
 185                 if(loop_)\r
 186                         return std::numeric_limits<int64_t>::max();\r
 187 \r
 188                 // This function estimates nb_frames until input has read all packets for one loop, at which point the count should be accurate.\r
 189 \r
 190                 int64_t nb_frames = input_.nb_frames();\r
 191                 if(input_.nb_loops() < 1) // input still hasn't counted all frames\r
 192                 {\r
 193                         int64_t video_nb_frames = video_decoder_.nb_frames();\r
 194                         int64_t audio_nb_frames = audio_decoder_.nb_frames();\r
 195 \r
 196                         nb_frames = std::max(nb_frames, std::max(video_nb_frames, audio_nb_frames));\r
 197                 }\r
 198 \r
 199                 nb_frames = muxer_.calc_nb_frames(nb_frames);\r
 200 \r
 201                 // TODO: Might need to scale nb_frames av frame_muxer transformations.\r
 202 \r
 203                 return nb_frames + late_frames_ - start_;\r
 204         }\r
 205                                 \r
 206         virtual std::wstring print() const\r
 207         {\r
 208                 return L"ffmpeg[" + boost::filesystem::wpath(filename_).filename() + L"]";\r
 209         }\r
 210 };\r
 211 \r
 212 safe_ptr<core::frame_producer> create_ffmpeg_producer(const safe_ptr<core::frame_factory>& frame_factory, const std::vector<std::wstring>& params)\r
 213 {               \r
 214         static const std::vector<std::wstring> extensions = boost::assign::list_of\r
 215                 (L"mpg")(L"mpeg")(L"avi")(L"mov")(L"qt")(L"webm")(L"dv")(L"mp4")(L"f4v")(L"flv")(L"mkv")(L"mka")(L"wmv")(L"wma")(L"ogg")(L"divx")(L"xvid")(L"wav")(L"mp3")(L"m2v");\r
 216         std::wstring filename = env::media_folder() + L"\\" + params[0];\r
 217         \r
 218         auto ext = boost::find_if(extensions, [&](const std::wstring& ex)\r
 219         {                                       \r
 220                 return boost::filesystem::is_regular_file(boost::filesystem::wpath(filename + L"." + ex));\r
 221         });\r
 222 \r
 223         if(ext == extensions.end())\r
 224                 return core::frame_producer::empty();\r
 225 \r
 226         std::wstring path = filename + L"." + *ext;\r
 227         bool loop = boost::find(params, L"LOOP") != params.end();\r
 228 \r
 229         size_t start = 0;\r
 230         size_t length = std::numeric_limits<size_t>::max();\r
 231         \r
 232         auto seek_it = boost::find(params, L"SEEK");\r
 233         if(seek_it != params.end())\r
 234         {\r
 235                 if(++seek_it != params.end())\r
 236                         start = boost::lexical_cast<size_t>(*seek_it);\r
 237         }\r
 238         \r
 239         auto length_it = boost::find(params, L"LENGTH");\r
 240         if(length_it != params.end())\r
 241         {\r
 242                 if(++length_it != params.end())\r
 243                         length = boost::lexical_cast<size_t>(*length_it);\r
 244         }\r
 245 \r
 246         std::wstring filter = L"";\r
 247         auto filter_it = boost::find(params, L"FILTER");\r
 248         if(filter_it != params.end())\r
 249         {\r
 250                 if(++filter_it != params.end())\r
 251                         filter = *filter_it;\r
 252         }\r
 253 \r
 254         return make_safe<ffmpeg_producer>(frame_factory, path, filter, loop, start, length);\r
 255 }\r
 256 \r
 257 }