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_BUFFER_COUNT = 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 \r
  82         bool                                                                    stop_;\r
  83         \r
  84 public:\r
  85         explicit implementation(input::target_t& target,\r
  86                                                         const safe_ptr<diagnostics::graph>& graph, \r
  87                                                         const std::wstring& filename, \r
  88                                                         bool loop, \r
  89                                                         size_t start,\r
  90                                                         size_t length)\r
  91                 : target_(target)\r
  92                 , filename_(filename)\r
  93                 , format_context_(open_input(filename))         \r
  94                 , default_stream_index_(av_find_default_stream_index(format_context_.get()))\r
  95                 , streams_(format_context_->streams, format_context_->streams + format_context_->nb_streams)\r
  96                 , graph_(graph)\r
  97                 , loop_(loop)\r
  98                 , start_(start)\r
  99                 , length_(length)\r
 100                 , frame_number_(0)\r
 101                 , stop_(false)\r
 102         {               \r
 103                 packets_count_  = 0;\r
 104                 nb_frames_              = 0;\r
 105                 nb_loops_               = 0;\r
 106                                 \r
 107                 av_dump_format(format_context_.get(), 0, narrow(filename).c_str(), 0);\r
 108                                 \r
 109                 if(start_ > 0)                  \r
 110                         seek_frame(start_);\r
 111                                                                 \r
 112                 graph_->set_color("seek", diagnostics::color(1.0f, 0.5f, 0.0f));\r
 113                 graph_->set_color("buffer-count", diagnostics::color(0.7f, 0.4f, 0.4f));\r
 114                 graph_->set_color("buffer-size", diagnostics::color(1.0f, 1.0f, 0.0f)); \r
 115         }\r
 116 \r
 117         ~implementation()\r
 118         {\r
 119                 agent::wait(this);\r
 120         }\r
 121         \r
 122         virtual void run()\r
 123         {\r
 124                 try\r
 125                 {\r
 126                         while(!stop_ && read_next_packet())\r
 127                         {\r
 128                         }\r
 129                 }\r
 130                 catch(...)\r
 131                 {\r
 132                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 133                 }       \r
 134         \r
 135                 BOOST_FOREACH(auto stream, streams_)\r
 136                         Concurrency::send(target_, eof_packet(stream->index));  \r
 137                                                         \r
 138                 done();\r
 139         }\r
 140 \r
 141         bool read_next_packet()\r
 142         {               \r
 143                 auto packet = create_packet();\r
 144                 \r
 145                 int ret = [&]() -> int\r
 146                 {\r
 147                         Concurrency::scoped_oversubcription_token oversubscribe;\r
 148                         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
 149                 }();\r
 150 \r
 151                 if(is_eof(ret))                                                                                                              \r
 152                 {\r
 153                         ++nb_loops_;\r
 154                         frame_number_ = 0;\r
 155 \r
 156                         if(loop_)\r
 157                         {\r
 158                                 CASPAR_LOG(trace) << print() << " Looping.";\r
 159                                 seek_frame(start_, AVSEEK_FLAG_BACKWARD);                       \r
 160                         }       \r
 161                         else\r
 162                         {\r
 163                                 CASPAR_LOG(trace) << print() << " Stopping.";\r
 164                                 return false;\r
 165                         }\r
 166                 }\r
 167                 else\r
 168                 {               \r
 169                         THROW_ON_ERROR(ret, print(), "av_read_frame");\r
 170 \r
 171                         if(packet->stream_index == default_stream_index_)\r
 172                         {\r
 173                                 if(nb_loops_ == 0)\r
 174                                         ++nb_frames_;\r
 175                                 ++frame_number_;\r
 176                         }\r
 177 \r
 178                         THROW_ON_ERROR2(av_dup_packet(packet.get()), print());\r
 179                                 \r
 180                         // Make sure that the packet is correctly deallocated even if size and data is modified during decoding.\r
 181                         auto size = packet->size;\r
 182                         auto data = packet->data;                       \r
 183 \r
 184                         packet = std::shared_ptr<AVPacket>(packet.get(), [=](AVPacket*)\r
 185                         {\r
 186                                 packet->size = size;\r
 187                                 packet->data = data;\r
 188                                 --packets_count_;\r
 189                                 graph_->update_value("buffer-count", (static_cast<double>(packets_count_)+0.001)/MAX_BUFFER_COUNT);     \r
 190                         });\r
 191 \r
 192                         ++packets_count_;\r
 193 \r
 194                         Concurrency::asend(target_, packet);\r
 195                                         \r
 196                         graph_->update_value("buffer-count", (static_cast<double>(packets_count_)+0.001)/MAX_BUFFER_COUNT);\r
 197                 }       \r
 198 \r
 199                 return true;\r
 200         }\r
 201 \r
 202         void seek_frame(int64_t frame, int flags = 0)\r
 203         {                       \r
 204                 if(flags == AVSEEK_FLAG_BACKWARD)\r
 205                 {\r
 206                         // Fix VP6 seeking\r
 207                         int vid_stream_index = av_find_best_stream(format_context_.get(), AVMEDIA_TYPE_VIDEO, -1, -1, 0, 0);\r
 208                         if(vid_stream_index >= 0)\r
 209                         {\r
 210                                 auto codec_id = format_context_->streams[vid_stream_index]->codec->codec_id;\r
 211                                 if(codec_id == CODEC_ID_VP6A || codec_id == CODEC_ID_VP6F || codec_id == CODEC_ID_VP6)\r
 212                                         flags |= AVSEEK_FLAG_BYTE;\r
 213                         }\r
 214                 }\r
 215 \r
 216                 THROW_ON_ERROR2(av_seek_frame(format_context_.get(), default_stream_index_, frame, flags), print());    \r
 217                 auto packet = create_packet();\r
 218                 packet->size = 0;               \r
 219 \r
 220                 BOOST_FOREACH(auto stream, streams_)\r
 221                         Concurrency::send(target_, loop_packet(stream->index)); \r
 222 \r
 223                 graph_->add_tag("seek");                \r
 224         }               \r
 225 \r
 226         bool is_eof(int ret)\r
 227         {\r
 228                 if(ret == AVERROR(EIO))\r
 229                         CASPAR_LOG(trace) << print() << " Received EIO, assuming EOF. " << nb_frames_;\r
 230                 if(ret == AVERROR_EOF)\r
 231                         CASPAR_LOG(trace) << print() << " Received EOF. " << nb_frames_;\r
 232 \r
 233                 CASPAR_VERIFY(ret >= 0 || ret == AVERROR_EOF || ret == AVERROR(EIO), ffmpeg_error() << source_info(narrow(print())));\r
 234 \r
 235                 return ret == AVERROR_EOF || ret == AVERROR(EIO) || frame_number_ >= length_; // av_read_frame doesn't always correctly return AVERROR_EOF;\r
 236         }\r
 237         \r
 238         std::wstring print() const\r
 239         {\r
 240                 return L"ffmpeg_input[" + filename_ + L")]";\r
 241         }\r
 242 };\r
 243 \r
 244 input::input(input::target_t& target,\r
 245                          const safe_ptr<diagnostics::graph>& graph, \r
 246                          const std::wstring& filename, \r
 247                          bool loop, \r
 248                          size_t start, \r
 249                          size_t length)\r
 250         : impl_(new implementation(target, graph, filename, loop, start, length))\r
 251 {\r
 252 }\r
 253 \r
 254 safe_ptr<AVFormatContext> input::context()\r
 255 {\r
 256         return safe_ptr<AVFormatContext>(impl_->format_context_);\r
 257 }\r
 258 \r
 259 size_t input::nb_frames() const\r
 260 {\r
 261         return impl_->nb_frames_;\r
 262 }\r
 263 \r
 264 size_t input::nb_loops() const \r
 265 {\r
 266         return impl_->nb_loops_;\r
 267 }\r
 268 \r
 269 void input::start()\r
 270 {\r
 271         impl_->start();\r
 272 }\r
 273 \r
 274 void input::stop()\r
 275 {\r
 276         impl_->stop_ = true;\r
 277 }\r
 278 \r
 279 }}