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                 // "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
  97                 task_group_.wait();\r
  98 \r
  99                 auto result = get_frame();\r
 100 \r
 101                 task_group_.run([=]\r
 102                 {\r
 103                         frame_timer_.restart();\r
 104                         decode_packets();\r
 105                         graph_->update_value("frame-time", static_cast<float>(frame_timer_.elapsed()*frame_factory_->get_video_format_desc().fps*0.5));\r
 106                 });                             \r
 107                                         \r
 108                 return result;\r
 109         }\r
 110         \r
 111         virtual std::wstring print() const\r
 112         {\r
 113                 return L"ffmpeg[" + boost::filesystem::wpath(filename_).filename() + L"]";\r
 114         }\r
 115 \r
 116         void decode_packets()\r
 117         {\r
 118                 tbb::parallel_invoke\r
 119                 (\r
 120                         [&]\r
 121                         {\r
 122                                 try\r
 123                                 {\r
 124                                         if(video_decoder_ && video_frames_.size() < 3)\r
 125                                                 boost::range::push_back(video_frames_, video_decoder_->receive());              \r
 126                                 }\r
 127                                 catch(...)\r
 128                                 {\r
 129                                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 130                                         video_decoder_.reset();\r
 131                                 }\r
 132                         }, \r
 133                         [&]\r
 134                         {\r
 135                                 try\r
 136                                 {\r
 137                                         if(audio_decoder_ && audio_chunks_.size() < 3)\r
 138                                                 boost::range::push_back(audio_chunks_, audio_decoder_->receive());              \r
 139                                 }\r
 140                                 catch(...)\r
 141                                 {\r
 142                                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 143                                         audio_decoder_.reset();\r
 144                                 }\r
 145                         }\r
 146                 );\r
 147                 \r
 148                 // If video is on first frame, sync with audio\r
 149                 if(audio_decoder_ && video_decoder_ && !video_frames_.empty() && !audio_chunks_.empty() &&\r
 150                    video_frames_.front().first == 0 && audio_chunks_.front().first != 0)\r
 151                 {\r
 152                         audio_decoder_->restart(); // Notify decoder to wait for eof which was sent with video eof.\r
 153                         audio_chunks_ = audio_decoder_->receive();              \r
 154                 }\r
 155                 \r
 156                 CASPAR_ASSERT(!(video_decoder_ && audio_decoder_ && !video_frames_.empty() && !audio_chunks_.empty()) ||\r
 157                                       video_frames_.front().first == audio_chunks_.front().first);\r
 158         }\r
 159 \r
 160         // FIXME: Don't re-interlace when going from 50i to 50p, maybe do this inside decoder?\r
 161         safe_ptr<core::basic_frame> get_video_frame(std::vector<int16_t>&& audio_chunk)\r
 162         {\r
 163                 auto frame = std::move(video_frames_.front().second);   \r
 164                 auto frame_number = video_frames_.front().first;\r
 165                 video_frames_.pop_front();\r
 166                                 \r
 167                 frame->audio_data() = std::move(audio_chunk);\r
 168                 if(frame->audio_data().empty())\r
 169                         frame->get_audio_transform().set_has_audio(false);      \r
 170 \r
 171                 if(!video_frames_.empty()) // interlace if we have double frames\r
 172                 {\r
 173                         if(video_frames_.front().first == frame_number)\r
 174                         {\r
 175                                 auto frame2 = std::move(video_frames_.front().second);  \r
 176                                 video_frames_.pop_front();\r
 177                                 frame2->get_audio_transform().set_has_audio(false);     \r
 178 \r
 179                                 return core::basic_frame::interlace(frame, frame2, frame_factory_->get_video_format_desc().mode);\r
 180                         }\r
 181                 }\r
 182 \r
 183                 return frame;\r
 184         }\r
 185 \r
 186         safe_ptr<core::basic_frame> get_frame()\r
 187         {               \r
 188                 if(video_decoder_ && audio_decoder_ && !video_frames_.empty() && !audio_chunks_.empty())\r
 189                 {\r
 190                         auto audio_chunk = std::move(audio_chunks_.front().second);\r
 191                         audio_chunks_.pop_front();\r
 192                                                 \r
 193                         return get_video_frame(std::move(audio_chunk));\r
 194                 }\r
 195                 else if(video_decoder_ && !audio_decoder_ && !video_frames_.empty())\r
 196                 {                                               \r
 197                         return get_video_frame(std::vector<int16_t>());\r
 198                 }\r
 199                 else if(audio_decoder_ && !video_decoder_ && !audio_chunks_.empty())\r
 200                 {\r
 201                         auto frame = frame_factory_->create_frame(this, 1, 1);\r
 202                         std::fill(frame->image_data().begin(), frame->image_data().end(), 0);\r
 203                                 \r
 204                         frame->audio_data() = std::move(audio_chunks_.front().second);\r
 205                         audio_chunks_.pop_front();\r
 206 \r
 207                         return frame;\r
 208                 }\r
 209                 else if(!input_.is_running() || (!video_decoder_ && !audio_decoder_))\r
 210                 {\r
 211                         return core::basic_frame::eof();\r
 212                 }\r
 213                 else\r
 214                 {\r
 215                         graph_->add_tag("underflow");\r
 216                         return core::basic_frame::late();\r
 217                 }\r
 218         }\r
 219 };\r
 220 \r
 221 safe_ptr<core::frame_producer> create_ffmpeg_producer(const safe_ptr<core::frame_factory>& frame_factory, const std::vector<std::wstring>& params)\r
 222 {               \r
 223         static const std::vector<std::wstring> extensions = boost::assign::list_of\r
 224                 (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
 225         std::wstring filename = env::media_folder() + L"\\" + params[0];\r
 226         \r
 227         auto ext = boost::find_if(extensions, [&](const std::wstring& ex)\r
 228         {                                       \r
 229                 return boost::filesystem::is_regular_file(boost::filesystem::wpath(filename + L"." + ex));\r
 230         });\r
 231 \r
 232         if(ext == extensions.end())\r
 233                 return core::frame_producer::empty();\r
 234 \r
 235         std::wstring path = filename + L"." + *ext;\r
 236         bool loop = boost::find(params, L"LOOP") != params.end();\r
 237 \r
 238         int start = -1;\r
 239         int length = -1;\r
 240         \r
 241         auto seek_it = std::find(params.begin(), params.end(), L"SEEK");\r
 242         if(seek_it != params.end())\r
 243         {\r
 244                 if(++seek_it != params.end())\r
 245                         start = boost::lexical_cast<int>(*seek_it);\r
 246         }\r
 247         \r
 248         std::wstring filter_str = L"";\r
 249 \r
 250         auto filter_it = std::find(params.begin(), params.end(), L"FILTER");\r
 251         if(filter_it != params.end())\r
 252         {\r
 253                 if(++filter_it != params.end())\r
 254                         filter_str = *filter_it;\r
 255         }\r
 256 \r
 257         return make_safe<ffmpeg_producer>(frame_factory, path, filter_str, loop, start, length);\r
 258 }\r
 259 \r
 260 }