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 #include "../tbb_avcodec.h"\r
  30 \r
  31 #include <core/video_format.h>\r
  32 \r
  33 #include <common/concrt/scoped_oversubscription_token.h>\r
  34 #include <common/diagnostics/graph.h>\r
  35 #include <common/exception/exceptions.h>\r
  36 #include <common/exception/win32_exception.h>\r
  37 \r
  38 #include <tbb/atomic.h>\r
  39 \r
  40 #include <boost/range/algorithm.hpp>\r
  41 \r
  42 #include <agents.h>\r
  43 \r
  44 #if defined(_MSC_VER)\r
  45 #pragma warning (push)\r
  46 #pragma warning (disable : 4244)\r
  47 #endif\r
  48 extern "C" \r
  49 {\r
  50         #define __STDC_CONSTANT_MACROS\r
  51         #define __STDC_LIMIT_MACROS\r
  52         #include <libavformat/avformat.h>\r
  53 }\r
  54 #if defined(_MSC_VER)\r
  55 #pragma warning (pop)\r
  56 #endif\r
  57 \r
  58 using namespace Concurrency;\r
  59 \r
  60 namespace caspar { namespace ffmpeg {\r
  61 \r
  62 static const size_t MAX_BUFFER_COUNT = 100;\r
  63 static const size_t MIN_BUFFER_COUNT = 4;\r
  64 static const size_t MAX_BUFFER_SIZE  = 16 * 1000000;\r
  65         \r
  66 struct input::implementation : public Concurrency::agent, boost::noncopyable\r
  67 {               \r
  68         std::shared_ptr<AVFormatContext>                                                        format_context_; // Destroy this last\r
  69         int                                                                                                                     default_stream_index_;\r
  70 \r
  71         safe_ptr<diagnostics::graph>                                                            graph_;\r
  72                 \r
  73         const std::wstring                                                                                      filename_;\r
  74         const bool                                                                                                      loop_;\r
  75         const size_t                                                                                            start_;         \r
  76         const size_t                                                                                            length_;\r
  77         size_t                                                                                                          frame_number_;\r
  78         \r
  79         input::token_t&                                                                                         active_token_;\r
  80         input::target_t&                                                                                        video_target_;\r
  81         input::target_t&                                                                                        audio_target_;\r
  82                 \r
  83         tbb::atomic<size_t>                                                                                     nb_frames_;\r
  84         tbb::atomic<size_t>                                                                                     nb_loops_;\r
  85 \r
  86         int                                                                                                                     video_index_;\r
  87         int                                                                                                                     audio_index_;\r
  88 \r
  89 public:\r
  90         explicit implementation(input::token_t& active_token,\r
  91                                                         input::target_t& video_target,\r
  92                                                         input::target_t& audio_target,\r
  93                                                         const safe_ptr<diagnostics::graph>& graph, \r
  94                                                         const std::wstring& filename, \r
  95                                                         bool loop, \r
  96                                                         size_t start,\r
  97                                                         size_t length)\r
  98                 : active_token_(active_token)\r
  99                 , video_target_(video_target)\r
 100                 , audio_target_(audio_target)\r
 101                 , graph_(graph)\r
 102                 , loop_(loop)\r
 103                 , filename_(filename)\r
 104                 , start_(start)\r
 105                 , length_(length)\r
 106                 , frame_number_(0)\r
 107         {                       \r
 108                 nb_frames_      = 0;\r
 109                 nb_loops_       = 0;\r
 110                 \r
 111                 AVFormatContext* weak_format_context_ = nullptr;\r
 112                 THROW_ON_ERROR2(avformat_open_input(&weak_format_context_, narrow(filename).c_str(), nullptr, nullptr), print());\r
 113 \r
 114                 format_context_.reset(weak_format_context_, av_close_input_file);\r
 115 \r
 116                 av_dump_format(weak_format_context_, 0, narrow(filename).c_str(), 0);\r
 117                         \r
 118                 THROW_ON_ERROR2(avformat_find_stream_info(format_context_.get(), nullptr), print());\r
 119                 \r
 120                 default_stream_index_ = THROW_ON_ERROR2(av_find_default_stream_index(format_context_.get()), print());\r
 121                 video_index_ = av_find_best_stream(format_context_.get(), AVMEDIA_TYPE_VIDEO, -1, -1, 0, 0);\r
 122                 audio_index_ = av_find_best_stream(format_context_.get(), AVMEDIA_TYPE_AUDIO, -1, -1, 0, 0);\r
 123                 \r
 124                 if(start_ > 0)                  \r
 125                         seek_frame(start_);\r
 126                 \r
 127                 for(int n = 0; n < 16; ++n)\r
 128                         read_next_packet();\r
 129                                                 \r
 130                 graph_->set_color("seek", diagnostics::color(1.0f, 0.5f, 0.0f));        \r
 131 \r
 132                 agent::start();\r
 133         }\r
 134 \r
 135         ~implementation()\r
 136         {\r
 137                 agent::wait(this);\r
 138         }\r
 139         \r
 140         virtual void run()\r
 141         {\r
 142                 try\r
 143                 {\r
 144                         while(Concurrency::receive(active_token_))\r
 145                         {\r
 146                                 if(!read_next_packet())\r
 147                                 {\r
 148                                         Concurrency::send(video_target_, eof_packet());\r
 149                                         Concurrency::send(audio_target_, eof_packet());\r
 150                                         break;\r
 151                                 }\r
 152                         }                               \r
 153                 }\r
 154                 catch(...)\r
 155                 {\r
 156                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 157                 }               \r
 158                                                 \r
 159                 done();\r
 160         }\r
 161 \r
 162         bool read_next_packet()\r
 163         {               \r
 164                 int ret = 0;\r
 165 \r
 166                 auto read_packet = create_packet();\r
 167 \r
 168                 {\r
 169                         Concurrency::scoped_oversubcription_token oversubscribe;\r
 170                         ret = av_read_frame(format_context_.get(), read_packet.get()); // read_packet is only valid until next call of av_read_frame. Use av_dup_packet to extend its life.     \r
 171                 }\r
 172 \r
 173                 if(is_eof(ret))                                                                                                              \r
 174                 {\r
 175                         ++nb_loops_;\r
 176                         frame_number_ = 0;\r
 177 \r
 178                         if(loop_)\r
 179                         {\r
 180                                 int flags = AVSEEK_FLAG_BACKWARD;\r
 181 \r
 182                                 int vid_stream_index = av_find_best_stream(format_context_.get(), AVMEDIA_TYPE_VIDEO, -1, -1, 0, 0);\r
 183                                 if(vid_stream_index >= 0)\r
 184                                 {\r
 185                                         auto codec_id = format_context_->streams[vid_stream_index]->codec->codec_id;\r
 186                                         if(codec_id == CODEC_ID_VP6A || codec_id == CODEC_ID_VP6F || codec_id == CODEC_ID_VP6)\r
 187                                                 flags |= AVSEEK_FLAG_BYTE;\r
 188                                 }\r
 189 \r
 190                                 seek_frame(start_, flags);\r
 191                                 graph_->add_tag("seek");                \r
 192                                 CASPAR_LOG(trace) << print() << " Looping.";                    \r
 193                         }       \r
 194                         else\r
 195                         {\r
 196                                 CASPAR_LOG(trace) << print() << " Stopping.";\r
 197                                 return false;\r
 198                         }\r
 199                 }\r
 200                 else if(read_packet->stream_index == video_index_ || read_packet->stream_index == audio_index_)\r
 201                 {               \r
 202                         THROW_ON_ERROR(ret, print(), "av_read_frame");\r
 203 \r
 204                         if(read_packet->stream_index == default_stream_index_)\r
 205                         {\r
 206                                 if(nb_loops_ == 0)\r
 207                                         ++nb_frames_;\r
 208                                 ++frame_number_;\r
 209                         }\r
 210 \r
 211                         THROW_ON_ERROR2(av_dup_packet(read_packet.get()), print());\r
 212                                 \r
 213                         // Make sure that the packet is correctly deallocated even if size and data is modified during decoding.\r
 214                         auto size = read_packet->size;\r
 215                         auto data = read_packet->data;\r
 216 \r
 217                         read_packet = std::shared_ptr<AVPacket>(read_packet.get(), [=](AVPacket*)\r
 218                         {\r
 219                                 read_packet->size = size;\r
 220                                 read_packet->data = data;\r
 221                         });\r
 222         \r
 223                         if(read_packet->stream_index == video_index_)\r
 224                                 Concurrency::send(video_target_, read_packet);\r
 225                         else if(read_packet->stream_index == audio_index_)\r
 226                                 Concurrency::send(audio_target_, read_packet);\r
 227                 }       \r
 228 \r
 229                 return true;\r
 230         }\r
 231 \r
 232         void seek_frame(int64_t frame, int flags = 0)\r
 233         {                                                       \r
 234                 THROW_ON_ERROR2(av_seek_frame(format_context_.get(), default_stream_index_, frame, flags), print());    \r
 235                 auto packet = create_packet();\r
 236                 packet->size = 0;\r
 237                 Concurrency::send(video_target_, loop_packet());                \r
 238                 Concurrency::send(audio_target_, loop_packet());\r
 239         }               \r
 240 \r
 241         bool is_eof(int ret)\r
 242         {\r
 243                 if(ret == AVERROR(EIO))\r
 244                         CASPAR_LOG(trace) << print() << " Received EIO, assuming EOF. " << nb_frames_;\r
 245                 if(ret == AVERROR_EOF)\r
 246                         CASPAR_LOG(trace) << print() << " Received EOF. " << nb_frames_;\r
 247 \r
 248                 return ret == AVERROR_EOF || ret == AVERROR(EIO) || frame_number_ >= length_; // av_read_frame doesn't always correctly return AVERROR_EOF;\r
 249         }\r
 250         \r
 251         std::wstring print() const\r
 252         {\r
 253                 return L"ffmpeg_input[" + filename_ + L")]";\r
 254         }\r
 255 };\r
 256 \r
 257 input::input(token_t& active_token,  \r
 258                          target_t& video_target,  \r
 259                          target_t& audio_target,  \r
 260                      const safe_ptr<diagnostics::graph>& graph, \r
 261                          const std::wstring& filename, \r
 262                          bool loop, \r
 263                          size_t start, \r
 264                          size_t length)\r
 265         : impl_(new implementation(active_token, video_target, audio_target, graph, filename, loop, start, length))\r
 266 {\r
 267 }\r
 268 \r
 269 safe_ptr<AVFormatContext> input::context()\r
 270 {\r
 271         return safe_ptr<AVFormatContext>(impl_->format_context_);\r
 272 }\r
 273 \r
 274 size_t input::nb_frames() const\r
 275 {\r
 276         return impl_->nb_frames_;\r
 277 }\r
 278 \r
 279 size_t input::nb_loops() const \r
 280 {\r
 281         return impl_->nb_loops_;\r
 282 }\r
 283 \r
 284 }}