git.sesse.net Git - casparcg/blob - modules/ffmpeg/producer/input.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 #if defined(_MSC_VER)\r
  21 #pragma warning (disable : 4244)\r
  22 #endif\r
  23 \r
  24 #include "../stdafx.h"\r
  25 \r
  26 #include "input.h"\r
  27 #include "util.h"\r
  28 #include "../ffmpeg_error.h"\r
  29 \r
  30 #include <core/video_format.h>\r
  31 \r
  32 #include <common/diagnostics/graph.h>\r
  33 #include <common/exception/exceptions.h>\r
  34 #include <common/exception/win32_exception.h>\r
  35 \r
  36 #include <tbb/atomic.h>\r
  37 \r
  38 #include <agents.h>\r
  39 #include <concrt_extras.h>\r
  40 #include <semaphore.h>\r
  41 \r
  42 #if defined(_MSC_VER)\r
  43 #pragma warning (push)\r
  44 #pragma warning (disable : 4244)\r
  45 #endif\r
  46 extern "C" \r
  47 {\r
  48         #define __STDC_CONSTANT_MACROS\r
  49         #define __STDC_LIMIT_MACROS\r
  50         #include <libavformat/avformat.h>\r
  51 }\r
  52 #if defined(_MSC_VER)\r
  53 #pragma warning (pop)\r
  54 #endif\r
  55 \r
  56 using namespace Concurrency;\r
  57 \r
  58 namespace caspar { namespace ffmpeg {\r
  59 \r
  60 static const size_t MAX_TOKENS = 32;\r
  61         \r
  62 struct input::implementation : public Concurrency::agent, boost::noncopyable\r
  63 {\r
  64         input::target_t&                                                target_;\r
  65 \r
  66         const std::wstring                                              filename_;\r
  67         const safe_ptr<AVFormatContext>                 format_context_; // Destroy this last\r
  68         int                                                                             default_stream_index_;\r
  69         const boost::iterator_range<AVStream**> streams_;\r
  70 \r
  71         safe_ptr<diagnostics::graph>                    graph_;\r
  72                 \r
  73         const bool                                                              loop_;\r
  74         const size_t                                                    start_;         \r
  75         const size_t                                                    length_;\r
  76         size_t                                                                  frame_number_;\r
  77                         \r
  78         tbb::atomic<size_t>                                             nb_frames_;\r
  79         tbb::atomic<size_t>                                             nb_loops_;      \r
  80         tbb::atomic<size_t>                                             packets_count_;\r
  81         tbb::atomic<size_t>                                             packets_size_;\r
  82 \r
  83         bool                                                                    stop_;\r
  84 \r
  85         safe_ptr<Concurrency::semaphore>                semaphore_;\r
  86         \r
  87 public:\r
  88         explicit implementation(input::target_t& target,\r
  89                                                         const safe_ptr<diagnostics::graph>& graph, \r
  90                                                         const std::wstring& filename, \r
  91                                                         bool loop, \r
  92                                                         size_t start,\r
  93                                                         size_t length)\r
  94                 : target_(target)\r
  95                 , filename_(filename)\r
  96                 , format_context_(open_input(filename))         \r
  97                 , default_stream_index_(av_find_default_stream_index(format_context_.get()))\r
  98                 , streams_(format_context_->streams, format_context_->streams + format_context_->nb_streams)\r
  99                 , graph_(graph)\r
 100                 , loop_(loop)\r
 101                 , start_(start)\r
 102                 , length_(length)\r
 103                 , frame_number_(0)\r
 104                 , stop_(false)\r
 105                 , semaphore_(make_safe<Concurrency::semaphore>(MAX_TOKENS))\r
 106         {               \r
 107                 packets_count_  = 0;\r
 108                 packets_size_   = 0;\r
 109                 nb_frames_              = 0;\r
 110                 nb_loops_               = 0;\r
 111                                 \r
 112                 av_dump_format(format_context_.get(), 0, narrow(filename).c_str(), 0);\r
 113                                 \r
 114                 if(start_ > 0)                  \r
 115                         seek_frame(start_);\r
 116                                                                 \r
 117                 graph_->set_color("seek", diagnostics::color(1.0f, 0.5f, 0.0f));\r
 118         }\r
 119         \r
 120         void stop()\r
 121         {\r
 122                 stop_ = true;\r
 123                 for(size_t n = 0; n < format_context_->nb_streams+1; ++n)\r
 124                         semaphore_->release();\r
 125                 agent::wait(this);\r
 126         }\r
 127         \r
 128         virtual void run()\r
 129         {\r
 130                 try\r
 131                 {\r
 132                         while(!stop_)\r
 133                         {\r
 134                                 auto packet = read_next_packet();\r
 135                                 if(!packet)\r
 136                                         break;\r
 137 \r
 138                                 Concurrency::asend(target_, make_message(packet, packet->stream_index == default_stream_index_ ? std::make_shared<token>(semaphore_) : nullptr));\r
 139                                 Concurrency::wait(0);\r
 140 \r
 141                                 //std::vector<std::shared_ptr<AVPacket>> buffer;\r
 142 \r
 143                                 //while(buffer.size() < 100 && !stop_)\r
 144                                 //{\r
 145                                 //      Concurrency::scoped_oversubcription_token oversubscribe;\r
 146                                 //      auto packet = read_next_packet();\r
 147                                 //      if(!packet)\r
 148                                 //              stop_ = true;\r
 149                                 //      else\r
 150                                 //              buffer.push_back(packet);\r
 151                                 //}\r
 152                                 //                              \r
 153                                 //std::stable_partition(buffer.begin(), buffer.end(), [this](const std::shared_ptr<AVPacket>& packet)\r
 154                                 //{\r
 155                                 //      return packet->stream_index != default_stream_index_;\r
 156                                 //});\r
 157 \r
 158                                 //BOOST_FOREACH(auto packet, buffer)\r
 159                                 //{\r
 160                                 //      Concurrency::asend(target_, make_message(packet, packet->stream_index == default_stream_index_ ? std::make_shared<token>(semaphore_) : nullptr));\r
 161                                 //      Concurrency::wait(0);\r
 162                                 //}\r
 163                         }\r
 164                 }\r
 165                 catch(...)\r
 166                 {\r
 167                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 168                 }       \r
 169         \r
 170                 BOOST_FOREACH(auto stream, streams_)\r
 171                 {\r
 172                         Concurrency::send(target_, make_message(eof_packet(stream->index), std::make_shared<token>(semaphore_)));       \r
 173                         Concurrency::send(target_, make_message(eof_packet(stream->index), std::make_shared<token>(semaphore_)));       \r
 174                 }\r
 175 \r
 176                 done();\r
 177         }\r
 178 \r
 179         std::shared_ptr<AVPacket> read_next_packet()\r
 180         {               \r
 181                 auto packet = create_packet();\r
 182                 \r
 183                 int ret = [&]() -> int\r
 184                 {\r
 185                         Concurrency::scoped_oversubcription_token oversubscribe;\r
 186                         return av_read_frame(format_context_.get(), packet.get()); // packet is only valid until next call of av_read_frame. Use av_dup_packet to extend its life.      \r
 187                 }();\r
 188 \r
 189                 if(is_eof(ret))                                                                                                              \r
 190                 {\r
 191                         ++nb_loops_;\r
 192                         frame_number_ = 0;\r
 193 \r
 194                         if(loop_)\r
 195                         {\r
 196                                 CASPAR_LOG(trace) << print() << " Looping.";\r
 197                                 seek_frame(start_, AVSEEK_FLAG_BACKWARD);                       \r
 198                         }       \r
 199                         else\r
 200                         {\r
 201                                 CASPAR_LOG(trace) << print() << " Stopping.";\r
 202                                 return nullptr;\r
 203                         }\r
 204                 }\r
 205 \r
 206                 THROW_ON_ERROR(ret, print(), "av_read_frame");\r
 207 \r
 208                 if(packet->stream_index == default_stream_index_)\r
 209                 {\r
 210                         if(nb_loops_ == 0)\r
 211                                 ++nb_frames_;\r
 212                         ++frame_number_;\r
 213                 }\r
 214 \r
 215                 THROW_ON_ERROR2(av_dup_packet(packet.get()), print());\r
 216                                 \r
 217                 // Make sure that the packet is correctly deallocated even if size and data is modified during decoding.\r
 218                 auto size = packet->size;\r
 219                 auto data = packet->data;                       \r
 220 \r
 221                 packet = std::shared_ptr<AVPacket>(packet.get(), [=](AVPacket*)\r
 222                 {\r
 223                         packet->size = size;\r
 224                         packet->data = data;\r
 225                         --packets_count_;\r
 226                 });\r
 227 \r
 228                 ++packets_count_;\r
 229                                                         \r
 230                 return packet;\r
 231         }\r
 232 \r
 233         void seek_frame(int64_t frame, int flags = 0)\r
 234         {                       \r
 235                 if(flags == AVSEEK_FLAG_BACKWARD)\r
 236                 {\r
 237                         // Fix VP6 seeking\r
 238                         int vid_stream_index = av_find_best_stream(format_context_.get(), AVMEDIA_TYPE_VIDEO, -1, -1, 0, 0);\r
 239                         if(vid_stream_index >= 0)\r
 240                         {\r
 241                                 auto codec_id = format_context_->streams[vid_stream_index]->codec->codec_id;\r
 242                                 if(codec_id == CODEC_ID_VP6A || codec_id == CODEC_ID_VP6F || codec_id == CODEC_ID_VP6)\r
 243                                         flags |= AVSEEK_FLAG_BYTE;\r
 244                         }\r
 245                 }\r
 246 \r
 247                 THROW_ON_ERROR2(av_seek_frame(format_context_.get(), default_stream_index_, frame, flags), print());    \r
 248                 auto packet = create_packet();\r
 249                 packet->size = 0;\r
 250 \r
 251                 BOOST_FOREACH(auto stream, streams_)\r
 252                         Concurrency::send(target_, make_message(loop_packet(stream->index), std::make_shared<token>(semaphore_)));      \r
 253 \r
 254                 graph_->add_tag("seek");                \r
 255         }               \r
 256 \r
 257         bool is_eof(int ret)\r
 258         {\r
 259                 if(ret == AVERROR(EIO))\r
 260                         CASPAR_LOG(trace) << print() << " Received EIO, assuming EOF. " << nb_frames_;\r
 261                 if(ret == AVERROR_EOF)\r
 262                         CASPAR_LOG(trace) << print() << " Received EOF. " << nb_frames_;\r
 263 \r
 264                 CASPAR_VERIFY(ret >= 0 || ret == AVERROR_EOF || ret == AVERROR(EIO), ffmpeg_error() << source_info(narrow(print())));\r
 265 \r
 266                 return ret == AVERROR_EOF || ret == AVERROR(EIO) || frame_number_ >= length_; // av_read_frame doesn't always correctly return AVERROR_EOF;\r
 267         }\r
 268         \r
 269         std::wstring print() const\r
 270         {\r
 271                 return L"ffmpeg_input[" + filename_ + L")]";\r
 272         }\r
 273 };\r
 274 \r
 275 input::input(input::target_t& target,\r
 276                          const safe_ptr<diagnostics::graph>& graph, \r
 277                          const std::wstring& filename, \r
 278                          bool loop, \r
 279                          size_t start, \r
 280                          size_t length)\r
 281         : impl_(new implementation(target, graph, filename, loop, start, length))\r
 282 {\r
 283 }\r
 284 \r
 285 safe_ptr<AVFormatContext> input::context()\r
 286 {\r
 287         return safe_ptr<AVFormatContext>(impl_->format_context_);\r
 288 }\r
 289 \r
 290 size_t input::nb_frames() const\r
 291 {\r
 292         return impl_->nb_frames_;\r
 293 }\r
 294 \r
 295 size_t input::nb_loops() const \r
 296 {\r
 297         return impl_->nb_loops_;\r
 298 }\r
 299 \r
 300 void input::start()\r
 301 {\r
 302         impl_->start();\r
 303 }\r
 304 \r
 305 void input::stop()\r
 306 {\r
 307         impl_->stop();\r
 308 }\r
 309 \r
 310 }}