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 "input.h"\r
  25 #include "audio/audio_decoder.h"\r
  26 #include "video/video_decoder.h"\r
  27 \r
  28 #include <common/utility/assert.h>\r
  29 #include <common/utility/timer.h>\r
  30 #include <common/diagnostics/graph.h>\r
  31 \r
  32 #include <core/producer/frame/basic_frame.h>\r
  33 #include <core/mixer/write_frame.h>\r
  34 #include <core/producer/frame/audio_transform.h>\r
  35 #include <core/video_format.h>\r
  36 \r
  37 #include <common/env.h>\r
  38 \r
  39 #include <tbb/parallel_invoke.h>\r
  40 #include <tbb/task_group.h>\r
  41 \r
  42 #include <boost/timer.hpp>\r
  43 #include <boost/range/algorithm.hpp>\r
  44 #include <boost/range/algorithm_ext.hpp>\r
  45 \r
  46 #include <deque>\r
  47 \r
  48 namespace caspar {\r
  49         \r
  50 struct ffmpeg_producer : public core::frame_producer\r
  51 {\r
  52         const std::wstring                                              filename_;\r
  53         \r
  54         const safe_ptr<diagnostics::graph>              graph_;\r
  55         boost::timer                                                    frame_timer_;\r
  56                                         \r
  57         const safe_ptr<core::frame_factory>             frame_factory_;\r
  58 \r
  59         input                                                                   input_; \r
  60         std::unique_ptr<video_decoder>                  video_decoder_;\r
  61         std::unique_ptr<audio_decoder>                  audio_decoder_;\r
  62 \r
  63         std::deque<std::pair<int, std::vector<int16_t>>> audio_chunks_;\r
  64         std::deque<std::pair<int, safe_ptr<core::write_frame>>> video_frames_;\r
  65         \r
  66         tbb::task_group                                                 task_group_;\r
  67 public:\r
  68         explicit ffmpeg_producer(const safe_ptr<core::frame_factory>& frame_factory, const std::wstring& filename, const std::wstring& filter_str, bool loop, int start, int length) \r
  69                 : filename_(filename)\r
  70                 , graph_(diagnostics::create_graph(narrow(print())))\r
  71                 , frame_factory_(frame_factory)         \r
  72                 , input_(safe_ptr<diagnostics::graph>(graph_), filename_, loop, start, length)\r
  73         {\r
  74                 graph_->add_guide("frame-time", 0.5);\r
  75                 graph_->set_color("frame-time",  diagnostics::color(1.0f, 0.0f, 0.0f));\r
  76                 graph_->set_color("underflow", diagnostics::color(0.6f, 0.3f, 0.9f));           \r
  77                 \r
  78                 double frame_time = 1.0f/input_.fps();\r
  79                 double format_frame_time = 1.0/frame_factory->get_video_format_desc().fps;\r
  80                 if(abs(frame_time - format_frame_time) > 0.0001 && abs(frame_time - format_frame_time/2) > 0.0001)\r
  81                         CASPAR_LOG(warning) << print() << L" Invalid framerate detected. This may cause distorted audio during playback. frame-time: " << frame_time;\r
  82                 \r
  83                 video_decoder_.reset(input_.get_video_codec_context() ? \r
  84                         new video_decoder(input_, frame_factory, narrow(filter_str)) : nullptr);\r
  85                         \r
  86                 audio_decoder_.reset(input_.get_audio_codec_context() ? \r
  87                         new audio_decoder(input_, frame_factory->get_video_format_desc()) : nullptr);           \r
  88                                         \r
  89                 // Fill buffers.\r
  90                 for(size_t n = 0; n < 2; ++n)\r
  91                         decode_packets();\r
  92         }\r
  93 \r
  94         virtual safe_ptr<core::basic_frame> receive()\r
  95         {\r
  96                 frame_timer_.restart();\r
  97 \r
  98                 auto result = decode_frame();\r
  99                                 \r
 100                 graph_->update_value("frame-time", static_cast<float>(frame_timer_.elapsed()*frame_factory_->get_video_format_desc().fps*0.5));\r
 101                                         \r
 102                 return result;\r
 103         }\r
 104         \r
 105         virtual std::wstring print() const\r
 106         {\r
 107                 return L"ffmpeg[" + boost::filesystem::wpath(filename_).filename() + L"]";\r
 108         }\r
 109 \r
 110         void decode_packets()\r
 111         {\r
 112                 tbb::parallel_invoke\r
 113                 (\r
 114                         [&]\r
 115                         {\r
 116                                 try\r
 117                                 {\r
 118                                         if(video_decoder_ && video_frames_.size() < 3)\r
 119                                                 boost::range::push_back(video_frames_, video_decoder_->receive());              \r
 120                                 }\r
 121                                 catch(...)\r
 122                                 {\r
 123                                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 124                                         video_decoder_.reset();\r
 125                                 }\r
 126                         }, \r
 127                         [&]\r
 128                         {\r
 129                                 try\r
 130                                 {\r
 131                                         if(audio_decoder_ && audio_chunks_.size() < 3)\r
 132                                                 boost::range::push_back(audio_chunks_, audio_decoder_->receive());              \r
 133                                 }\r
 134                                 catch(...)\r
 135                                 {\r
 136                                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 137                                         audio_decoder_.reset();\r
 138                                 }\r
 139                         }\r
 140                 );\r
 141                 \r
 142                 // If video is on first frame, sync with audio\r
 143                 if(audio_decoder_ && video_decoder_ && !video_frames_.empty() && !audio_chunks_.empty() &&\r
 144                    video_frames_.front().first == 0 && audio_chunks_.front().first != 0)\r
 145                 {\r
 146                         audio_decoder_->restart(); // Notify decoder to wait for eof which was sent with video eof.\r
 147                         audio_chunks_ = audio_decoder_->receive();              \r
 148                 }\r
 149                 \r
 150                 CASPAR_ASSERT(!(video_decoder_ && audio_decoder_ && !video_frames_.empty() && !audio_chunks_.empty()) ||\r
 151                                       video_frames_.front().first == audio_chunks_.front().first);\r
 152         }\r
 153 \r
 154         // FIXME: Don't re-interlace when going from 50i to 50p, maybe do this inside decoder?\r
 155         safe_ptr<core::basic_frame> get_video_frame(std::vector<int16_t>&& audio_chunk)\r
 156         {\r
 157                 auto frame = std::move(video_frames_.front().second);   \r
 158                 auto frame_number = video_frames_.front().first;\r
 159                 video_frames_.pop_front();\r
 160                                 \r
 161                 frame->audio_data() = std::move(audio_chunk);\r
 162                 if(frame->audio_data().empty())\r
 163                         frame->get_audio_transform().set_has_audio(false);      \r
 164 \r
 165                 if(!video_frames_.empty()) // interlace if we have double frames\r
 166                 {\r
 167                         if(video_frames_.front().first == frame_number)\r
 168                         {\r
 169                                 auto frame2 = std::move(video_frames_.front().second);  \r
 170                                 video_frames_.pop_front();\r
 171                                 frame2->get_audio_transform().set_has_audio(false);     \r
 172 \r
 173                                 return core::basic_frame::interlace(frame, frame2, frame_factory_->get_video_format_desc().mode);\r
 174                         }\r
 175                 }\r
 176 \r
 177                 return frame;\r
 178         }\r
 179 \r
 180         safe_ptr<core::basic_frame> decode_frame()\r
 181         {               \r
 182                 // "receive" is called on the same thread as the gpu mixer runs. Minimize "receive" time in order to allow gpu and cpu to run in parallel. \r
 183                 task_group_.wait();\r
 184                 task_group_.run([=]\r
 185                 {\r
 186                         decode_packets();\r
 187                 });\r
 188 \r
 189                 if(video_decoder_ && audio_decoder_ && !video_frames_.empty() && !audio_chunks_.empty())\r
 190                 {\r
 191                         auto audio_chunk = std::move(audio_chunks_.front().second);\r
 192                         audio_chunks_.pop_front();\r
 193                                                 \r
 194                         return get_video_frame(std::move(audio_chunk));\r
 195                 }\r
 196                 else if(video_decoder_ && !audio_decoder_ && !video_frames_.empty())\r
 197                 {                                               \r
 198                         return get_video_frame(std::vector<int16_t>());\r
 199                 }\r
 200                 else if(audio_decoder_ && !video_decoder_ && !audio_chunks_.empty())\r
 201                 {\r
 202                         auto frame = frame_factory_->create_frame(this, 1, 1);\r
 203                         std::fill(frame->image_data().begin(), frame->image_data().end(), 0);\r
 204                                 \r
 205                         frame->audio_data() = std::move(audio_chunks_.front().second);\r
 206                         audio_chunks_.pop_front();\r
 207 \r
 208                         return frame;\r
 209                 }\r
 210                 else if(!input_.is_running() || (!video_decoder_ && !audio_decoder_))\r
 211                 {\r
 212                         return core::basic_frame::eof();\r
 213                 }\r
 214                 else\r
 215                 {\r
 216                         graph_->add_tag("underflow");\r
 217                         return core::basic_frame::late();\r
 218                 }\r
 219         }\r
 220 };\r
 221 \r
 222 safe_ptr<core::frame_producer> create_ffmpeg_producer(const safe_ptr<core::frame_factory>& frame_factory, const std::vector<std::wstring>& params)\r
 223 {               \r
 224         static const std::vector<std::wstring> extensions = boost::assign::list_of\r
 225                 (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
 226         std::wstring filename = env::media_folder() + L"\\" + params[0];\r
 227         \r
 228         auto ext = boost::find_if(extensions, [&](const std::wstring& ex)\r
 229         {                                       \r
 230                 return boost::filesystem::is_regular_file(boost::filesystem::wpath(filename + L"." + ex));\r
 231         });\r
 232 \r
 233         if(ext == extensions.end())\r
 234                 return core::frame_producer::empty();\r
 235 \r
 236         std::wstring path = filename + L"." + *ext;\r
 237         bool loop = boost::find(params, L"LOOP") != params.end();\r
 238 \r
 239         int start = -1;\r
 240         int length = -1;\r
 241         \r
 242         auto seek_it = std::find(params.begin(), params.end(), L"SEEK");\r
 243         if(seek_it != params.end())\r
 244         {\r
 245                 if(++seek_it != params.end())\r
 246                         start = boost::lexical_cast<int>(*seek_it);\r
 247         }\r
 248         \r
 249         std::wstring filter_str = L"";\r
 250 \r
 251         auto filter_it = std::find(params.begin(), params.end(), L"FILTER");\r
 252         if(filter_it != params.end())\r
 253         {\r
 254                 if(++filter_it != params.end())\r
 255                         filter_str = *filter_it;\r
 256         }\r
 257 \r
 258         return make_safe<ffmpeg_producer>(frame_factory, path, filter_str, loop, start, length);\r
 259 }\r
 260 \r
 261 }