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 \r
  41 #include <boost/timer.hpp>\r
  42 #include <boost/range/algorithm.hpp>\r
  43 #include <boost/range/algorithm_ext.hpp>\r
  44 \r
  45 #include <deque>\r
  46 \r
  47 namespace caspar {\r
  48         \r
  49 struct ffmpeg_producer : public core::frame_producer\r
  50 {\r
  51         const std::wstring                                              filename_;\r
  52         \r
  53         const safe_ptr<diagnostics::graph>              graph_;\r
  54         boost::timer                                                    frame_timer_;\r
  55                                         \r
  56         const safe_ptr<core::frame_factory>             frame_factory_;\r
  57 \r
  58         input                                                                   input_; \r
  59         std::unique_ptr<video_decoder>                  video_decoder_;\r
  60         std::unique_ptr<audio_decoder>                  audio_decoder_;\r
  61 public:\r
  62         explicit ffmpeg_producer(const safe_ptr<core::frame_factory>& frame_factory, const std::wstring& filename, bool loop, int start, int length) \r
  63                 : filename_(filename)\r
  64                 , graph_(diagnostics::create_graph(narrow(print())))\r
  65                 , frame_factory_(frame_factory)         \r
  66                 , input_(safe_ptr<diagnostics::graph>(graph_), filename_, loop, start, length)\r
  67         {\r
  68                 graph_->add_guide("frame-time", 0.5);\r
  69                 graph_->set_color("frame-time",  diagnostics::color(1.0f, 0.0f, 0.0f));\r
  70                 graph_->set_color("underflow", diagnostics::color(0.6f, 0.3f, 0.9f));           \r
  71                 \r
  72                 double frame_time = 1.0f/input_.fps();\r
  73                 double format_frame_time = 1.0/frame_factory->get_video_format_desc().fps;\r
  74                 if(abs(frame_time - format_frame_time) > 0.0001 && abs(frame_time - format_frame_time/2) > 0.0001)\r
  75                         CASPAR_LOG(warning) << print() << L" Invalid framerate detected. This may cause distorted audio during playback. frame-time: " << frame_time;\r
  76                 \r
  77                 video_decoder_.reset(input_.get_video_codec_context() ? \r
  78                         new video_decoder(*input_.get_video_codec_context(), frame_factory) : nullptr);\r
  79                         \r
  80                 audio_decoder_.reset(input_.get_audio_codec_context() ? \r
  81                         new audio_decoder(*input_.get_audio_codec_context(), frame_factory->get_video_format_desc()) : nullptr);                \r
  82                                         \r
  83                 // Fill buffers.\r
  84                 decode_next_packets();\r
  85         }\r
  86 \r
  87         virtual safe_ptr<core::basic_frame> receive()\r
  88         {\r
  89                 frame_timer_.restart();\r
  90 \r
  91                 auto result = decode_frame();\r
  92                                 \r
  93                 graph_->update_value("frame-time", static_cast<float>(frame_timer_.elapsed()*frame_factory_->get_video_format_desc().fps*0.5));\r
  94                                         \r
  95                 return result;\r
  96         }\r
  97         \r
  98         virtual std::wstring print() const\r
  99         {\r
 100                 return L"ffmpeg[" + boost::filesystem::wpath(filename_).filename() + L"]";\r
 101         }\r
 102 \r
 103         void decode_next_packets()\r
 104         {\r
 105                 tbb::parallel_invoke\r
 106                 (\r
 107                         [&]\r
 108                         {\r
 109                                 if(!video_decoder_)\r
 110                                         return;\r
 111 \r
 112                                 std::shared_ptr<AVPacket> pkt;\r
 113                                 for(int n = 0; n < 16 && video_decoder_->empty() && input_.try_pop_video_packet(pkt); ++n)                              \r
 114                                         video_decoder_->push(pkt);                              \r
 115                         }, \r
 116                         [&]\r
 117                         {\r
 118                                 if(!audio_decoder_)\r
 119                                         return;\r
 120                                 \r
 121                                 std::shared_ptr<AVPacket> pkt;  \r
 122                                 for(int n = 0; n < 16 && audio_decoder_->empty() && input_.try_pop_audio_packet(pkt); ++n)                              \r
 123                                         audio_decoder_->push(pkt);                              \r
 124                         }\r
 125                 );\r
 126                 \r
 127                 // Sync up audio with video on start. Last frame sometimes have more samples than required. Remove those.\r
 128                 if(audio_decoder_ && video_decoder_ && video_decoder_->frame_number() == 0)\r
 129                 {\r
 130                         std::shared_ptr<AVPacket> pkt;\r
 131                         while(audio_decoder_->frame_number() > 0 && input_.try_pop_audio_packet(pkt))\r
 132                         {\r
 133                                 audio_decoder_->push(pkt);\r
 134                                 if(audio_decoder_->frame_number() > 0)\r
 135                                         audio_decoder_->pop();\r
 136                         }\r
 137                         \r
 138                         for(int n = 0; n < 16 && audio_decoder_->empty() && input_.try_pop_audio_packet(pkt); ++n)                              \r
 139                                 audio_decoder_->push(pkt);              \r
 140                 }\r
 141         }\r
 142 \r
 143         safe_ptr<core::basic_frame> decode_frame()\r
 144         {\r
 145                 decode_next_packets();\r
 146 \r
 147                 if(video_decoder_ && !video_decoder_->empty() && audio_decoder_ && !audio_decoder_->empty())\r
 148                 {\r
 149                         auto frame = std::move(video_decoder_->front());                                \r
 150                         video_decoder_->pop();\r
 151                                 \r
 152                         frame->audio_data() = std::move(audio_decoder_->front());\r
 153                         audio_decoder_->pop();\r
 154                         \r
 155                         return frame;\r
 156                 }\r
 157                 else if(video_decoder_ && !video_decoder_->empty() && !audio_decoder_)\r
 158                 {\r
 159                         auto frame = std::move(video_decoder_->front());                                \r
 160                         video_decoder_->pop();\r
 161                         frame->get_audio_transform().set_has_audio(false);      \r
 162                         \r
 163                         return frame;\r
 164                 }\r
 165                 else if(audio_decoder_ && !audio_decoder_->empty() && !video_decoder_)\r
 166                 {\r
 167                         auto frame = frame_factory_->create_frame(this, 1, 1);\r
 168                         std::fill(frame->image_data().begin(), frame->image_data().end(), 0);\r
 169                                 \r
 170                         frame->audio_data() = std::move(audio_decoder_->front());\r
 171                         audio_decoder_->pop();\r
 172 \r
 173                         return frame;\r
 174                 }\r
 175                 else if(!input_.is_running() || (!video_decoder_ && !audio_decoder_))\r
 176                 {\r
 177                         return core::basic_frame::eof();\r
 178                 }\r
 179                 else\r
 180                 {\r
 181                         graph_->add_tag("underflow");\r
 182                         return core::basic_frame::late();\r
 183                 }\r
 184         }\r
 185 };\r
 186 \r
 187 safe_ptr<core::frame_producer> create_ffmpeg_producer(const safe_ptr<core::frame_factory>& frame_factory, const std::vector<std::wstring>& params)\r
 188 {               \r
 189         static const std::vector<std::wstring> extensions = boost::assign::list_of\r
 190                 (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
 191         std::wstring filename = env::media_folder() + L"\\" + params[0];\r
 192         \r
 193         auto ext = boost::find_if(extensions, [&](const std::wstring& ex)\r
 194         {                                       \r
 195                 return boost::filesystem::is_regular_file(boost::filesystem::wpath(filename).replace_extension(ex));\r
 196         });\r
 197 \r
 198         if(ext == extensions.end())\r
 199                 return core::frame_producer::empty();\r
 200 \r
 201         std::wstring path = filename + L"." + *ext;\r
 202         bool loop = boost::find(params, L"LOOP") != params.end();\r
 203 \r
 204         static const boost::wregex expr(L"\\((?<START>\\d+)(,(?<LENGTH>\\d+)?)?\\)");//(,(?<END>\\d+))?\\]"); // boost::regex has no repeated captures?\r
 205         boost::wsmatch what;\r
 206         auto it = std::find_if(params.begin(), params.end(), [&](const std::wstring& str)\r
 207         {\r
 208                 return boost::regex_match(str, what, expr);\r
 209         });\r
 210 \r
 211         int start = -1;\r
 212         int length = -1;\r
 213 \r
 214         if(it != params.end())\r
 215         {\r
 216                 start = lexical_cast_or_default(what["START"].str(), -1);\r
 217                 if(what["LENGTH"].matched)\r
 218                         length = lexical_cast_or_default(what["LENGTH"].str(), -1);\r
 219         }\r
 220         \r
 221         return make_safe<ffmpeg_producer>(frame_factory, path, loop, start, length);\r
 222 }\r
 223 \r
 224 }