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 #include "..\stdafx.h"\r
  21 \r
  22 #include "input.h"\r
  23 #include "../ffmpeg_error.h"\r
  24 \r
  25 #include <core/video_format.h>\r
  26 \r
  27 #include <common/concurrency/executor.h>\r
  28 #include <common/diagnostics/graph.h>\r
  29 \r
  30 #include <tbb/concurrent_queue.h>\r
  31 #include <tbb/mutex.h>\r
  32 \r
  33 #if defined(_MSC_VER)\r
  34 #pragma warning (disable : 4244)\r
  35 #endif\r
  36 \r
  37 extern "C" \r
  38 {\r
  39         #define __STDC_CONSTANT_MACROS\r
  40         #define __STDC_LIMIT_MACROS\r
  41         #include <libavformat/avformat.h>\r
  42 }\r
  43 \r
  44 namespace caspar {\r
  45                 \r
  46 struct input::implementation : boost::noncopyable\r
  47 {               \r
  48         static const size_t PACKET_BUFFER_COUNT = 25;\r
  49 \r
  50         safe_ptr<diagnostics::graph> graph_;\r
  51 \r
  52         std::shared_ptr<AVFormatContext> format_context_;       // Destroy this last\r
  53 \r
  54         std::shared_ptr<AVCodecContext> video_codec_context_;\r
  55         std::shared_ptr<AVCodecContext> audio_codex_context_;\r
  56         \r
  57         const std::wstring      filename_;\r
  58         const bool                      loop_;\r
  59         int                                     video_s_index_;\r
  60         int                                     audio_s_index_;\r
  61         const int                       start_frame_;\r
  62         const int                       end_frame_;\r
  63         int                                     eof_count_;\r
  64                 \r
  65         tbb::concurrent_bounded_queue<std::shared_ptr<aligned_buffer>> video_packet_buffer_;\r
  66         tbb::concurrent_bounded_queue<std::shared_ptr<aligned_buffer>> audio_packet_buffer_;\r
  67 \r
  68         boost::condition_variable       cond_;\r
  69         boost::mutex                            mutex_;\r
  70         \r
  71         std::exception_ptr exception_;\r
  72         executor executor_;\r
  73 public:\r
  74         explicit implementation(const safe_ptr<diagnostics::graph>& graph, const std::wstring& filename, bool loop, int start_frame, int end_frame) \r
  75                 : graph_(graph)\r
  76                 , loop_(loop)\r
  77                 , video_s_index_(-1)\r
  78                 , audio_s_index_(-1)\r
  79                 , filename_(filename)\r
  80                 , executor_(print())\r
  81                 , start_frame_(std::max(start_frame, 0))\r
  82                 , end_frame_(end_frame)\r
  83                 , eof_count_(end_frame-start_frame)\r
  84         {                       \r
  85                 if(end_frame_ > 0 && end_frame <= start_frame_)\r
  86                 {       \r
  87                         BOOST_THROW_EXCEPTION(\r
  88                                 invalid_argument() << \r
  89                                 source_info(narrow(print())) << \r
  90                                 msg_info("End-frame cannot be lower than start-frame."));       \r
  91                 }\r
  92 \r
  93                 graph_->set_color("input-buffer", diagnostics::color(1.0f, 1.0f, 0.0f));\r
  94                 graph_->set_color("seek", diagnostics::color(0.5f, 1.0f, 0.5f));        \r
  95 \r
  96                 int errn;\r
  97                 AVFormatContext* weak_format_context_ = nullptr;\r
  98                 if((errn = av_open_input_file(&weak_format_context_, narrow(filename).c_str(), nullptr, 0, nullptr)) < 0 || weak_format_context_ == nullptr)\r
  99                         BOOST_THROW_EXCEPTION(\r
 100                                 file_read_error() << \r
 101                                 source_info(narrow(print())) << \r
 102                                 msg_info(av_error_str(errn)) <<\r
 103                                 boost::errinfo_api_function("av_open_input_file") <<\r
 104                                 boost::errinfo_errno(AVUNERROR(errn)) <<\r
 105                                 boost::errinfo_file_name(narrow(filename)));\r
 106 \r
 107                 format_context_.reset(weak_format_context_, av_close_input_file);\r
 108                         \r
 109                 if((errn = av_find_stream_info(format_context_.get())) < 0)\r
 110                 {       \r
 111                         BOOST_THROW_EXCEPTION(\r
 112                                 file_read_error() << \r
 113                                 source_info(narrow(print())) << \r
 114                                 msg_info(av_error_str(errn)) <<\r
 115                                 boost::errinfo_api_function("av_find_stream_info") <<\r
 116                                 boost::errinfo_errno(AVUNERROR(errn)));\r
 117                 }\r
 118 \r
 119                 video_codec_context_ = open_stream(CODEC_TYPE_VIDEO, video_s_index_);\r
 120                 if(!video_codec_context_)\r
 121                         CASPAR_LOG(warning) << print() << " Could not open any video stream.";\r
 122                 else\r
 123                         fix_time_base(video_codec_context_.get());\r
 124                 \r
 125                 audio_codex_context_ = open_stream(CODEC_TYPE_AUDIO, audio_s_index_);\r
 126                 if(!audio_codex_context_)\r
 127                         CASPAR_LOG(warning) << print() << " Could not open any audio stream.";\r
 128                 else\r
 129                         fix_time_base(audio_codex_context_.get());\r
 130 \r
 131                 if(!video_codec_context_ && !audio_codex_context_)\r
 132                 {       \r
 133                         BOOST_THROW_EXCEPTION(\r
 134                                 file_read_error() << \r
 135                                 msg_info(av_error_str(errn)) <<\r
 136                                 source_info(narrow(print())) << \r
 137                                 msg_info("No video or audio codec context found."));    \r
 138                 }\r
 139 \r
 140                 if(start_frame_ != 0)                   \r
 141                         seek_frame(start_frame_);\r
 142                                         \r
 143                 executor_.start();\r
 144                 executor_.begin_invoke([this]{read_file();});\r
 145                 CASPAR_LOG(info) << print() << " Started.";\r
 146         }\r
 147 \r
 148         ~implementation()\r
 149         {\r
 150                 executor_.clear();\r
 151                 executor_.stop();\r
 152                 cond_.notify_all();\r
 153         }\r
 154                 \r
 155         std::shared_ptr<aligned_buffer> get_video_packet()\r
 156         {\r
 157                 return get_packet(video_packet_buffer_);\r
 158         }\r
 159 \r
 160         std::shared_ptr<aligned_buffer> get_audio_packet()\r
 161         {\r
 162                 return get_packet(audio_packet_buffer_);\r
 163         }\r
 164 \r
 165         bool has_packet() const\r
 166         {\r
 167                 return !video_packet_buffer_.empty() || !audio_packet_buffer_.empty();\r
 168         }\r
 169                                 \r
 170         double fps()\r
 171         {\r
 172                 return static_cast<double>(get_default_context()->time_base.den) / static_cast<double>(get_default_context()->time_base.num);\r
 173         }\r
 174 \r
 175 private:\r
 176 \r
 177         void stop()\r
 178         {\r
 179                 executor_.stop();\r
 180                 CASPAR_LOG(info) << print() << " Stopped.";\r
 181         }\r
 182                         \r
 183         void fix_time_base(AVCodecContext* context) const // Some files give an invalid numerator, try to fix it.\r
 184         {\r
 185                 if(context && context->time_base.num == 1)\r
 186                         context->time_base.num = static_cast<int>(std::pow(10.0, static_cast<int>(std::log10(static_cast<float>(context->time_base.den)))-1));\r
 187         }\r
 188 \r
 189         std::shared_ptr<AVCodecContext> open_stream(int codec_type, int& s_index) const\r
 190         {               \r
 191                 AVStream** streams_end = format_context_->streams+format_context_->nb_streams;\r
 192                 AVStream** stream = std::find_if(format_context_->streams, streams_end, [&](AVStream* stream) \r
 193                 {\r
 194                         return stream != nullptr && stream->codec->codec_type == codec_type;\r
 195                 });\r
 196                 \r
 197                 if(stream == streams_end) \r
 198                         return nullptr;\r
 199                 \r
 200                 auto codec = avcodec_find_decoder((*stream)->codec->codec_id);                  \r
 201                 if(codec == nullptr)\r
 202                         return nullptr;\r
 203                         \r
 204                 if((-avcodec_open((*stream)->codec, codec)) > 0)                \r
 205                         return nullptr;\r
 206                 \r
 207                 s_index = (*stream)->index;\r
 208 \r
 209                 return std::shared_ptr<AVCodecContext>((*stream)->codec, avcodec_close);\r
 210         }\r
 211         \r
 212         std::shared_ptr<AVCodecContext>& get_default_context()\r
 213         {\r
 214                 return video_codec_context_ ? video_codec_context_ : audio_codex_context_;\r
 215         }\r
 216                 \r
 217         void read_file()\r
 218         {               \r
 219                 try\r
 220                 {\r
 221                         AVPacket tmp_packet;\r
 222                         safe_ptr<AVPacket> read_packet(&tmp_packet, av_free_packet);    \r
 223 \r
 224                         const int errn = av_read_frame(format_context_.get(), read_packet.get());\r
 225                         if(is_eof(errn))\r
 226                         {\r
 227                                 if(loop_)\r
 228                                 {\r
 229                                         seek_frame(start_frame_, AVSEEK_FLAG_BACKWARD);\r
 230                                         // AVCodecContext.frame_number is not reset. Increase the target frame_number.\r
 231                                         eof_count_ += end_frame_ - start_frame_; \r
 232                                         graph_->add_tag("seek");        \r
 233                                 }       \r
 234                                 else\r
 235                                         stop();\r
 236                         }\r
 237                         else if(errn < 0)\r
 238                         {\r
 239                                 BOOST_THROW_EXCEPTION(\r
 240                                         invalid_operation() <<\r
 241                                         msg_info(av_error_str(errn)) <<\r
 242                                         source_info(narrow(print())) << \r
 243                                         boost::errinfo_api_function("av_read_frame") <<\r
 244                                         boost::errinfo_errno(AVUNERROR(errn)));\r
 245                         }\r
 246                         else\r
 247                         {\r
 248                                 if(read_packet->stream_index == video_s_index_)                 \r
 249                                         video_packet_buffer_.try_push(std::make_shared<aligned_buffer>(read_packet->data, read_packet->data + read_packet->size));      \r
 250                                 else if(read_packet->stream_index == audio_s_index_)    \r
 251                                         audio_packet_buffer_.try_push(std::make_shared<aligned_buffer>(read_packet->data, read_packet->data + read_packet->size));      \r
 252                         }\r
 253                                                 \r
 254                         graph_->update_value("input-buffer", static_cast<float>(video_packet_buffer_.size())/static_cast<float>(PACKET_BUFFER_COUNT));          \r
 255                 }\r
 256                 catch(...)\r
 257                 {\r
 258                         stop();\r
 259                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 260                         return;\r
 261                 }\r
 262                                 \r
 263                 executor_.begin_invoke([this]{read_file();});           \r
 264                 boost::unique_lock<boost::mutex> lock(mutex_);\r
 265                 while(executor_.is_running() && audio_packet_buffer_.size() > PACKET_BUFFER_COUNT && video_packet_buffer_.size() > PACKET_BUFFER_COUNT)\r
 266                         cond_.wait(lock);               \r
 267         }\r
 268 \r
 269         void seek_frame(int64_t frame, int flags = 0)\r
 270         {       \r
 271                 // Convert from frames into seconds.\r
 272                 auto ts = frame*static_cast<int64_t>((AV_TIME_BASE*get_default_context()->time_base.num) / get_default_context()->time_base.den);\r
 273 \r
 274                 const int errn = av_seek_frame(format_context_.get(), -1, ts, flags | AVSEEK_FLAG_FRAME);\r
 275 \r
 276                 if(errn < 0)\r
 277                 {       \r
 278                         BOOST_THROW_EXCEPTION(\r
 279                                 invalid_operation() << \r
 280                                 source_info(narrow(print())) << \r
 281                                 msg_info(av_error_str(errn)) <<\r
 282                                 boost::errinfo_api_function("seek_frame") <<\r
 283                                 boost::errinfo_errno(AVUNERROR(errn)));\r
 284                 }\r
 285 \r
 286                 // Notify decoders to flush buffers.\r
 287                 video_packet_buffer_.try_push(std::make_shared<aligned_buffer>());      \r
 288                 audio_packet_buffer_.try_push(std::make_shared<aligned_buffer>());\r
 289         }\r
 290                 \r
 291 \r
 292         bool is_eof(int errn)\r
 293         {\r
 294                 if(end_frame_ != -1)\r
 295                         return get_default_context()->frame_number > eof_count_;                \r
 296 \r
 297                 return errn == AVERROR_EOF || errn == AVERROR_IO;\r
 298         }\r
 299                 \r
 300         std::shared_ptr<aligned_buffer> get_packet(tbb::concurrent_bounded_queue<std::shared_ptr<aligned_buffer>>& buffer)\r
 301         {\r
 302                 cond_.notify_all();\r
 303                 std::shared_ptr<aligned_buffer> packet;\r
 304                 return buffer.try_pop(packet) ? packet : nullptr;\r
 305         }\r
 306 \r
 307         std::wstring print() const\r
 308         {\r
 309                 return L"ffmpeg_input[" + filename_ + L"]";\r
 310         }\r
 311 };\r
 312 \r
 313 input::input(const safe_ptr<diagnostics::graph>& graph, const std::wstring& filename, bool loop, int start_frame, int end_frame) : impl_(new implementation(graph, filename, loop, start_frame, end_frame)){}\r
 314 const std::shared_ptr<AVCodecContext>& input::get_video_codec_context() const{return impl_->video_codec_context_;}\r
 315 const std::shared_ptr<AVCodecContext>& input::get_audio_codec_context() const{return impl_->audio_codex_context_;}\r
 316 bool input::has_packet() const{return impl_->has_packet();}\r
 317 bool input::is_running() const {return impl_->executor_.is_running();}\r
 318 std::shared_ptr<aligned_buffer> input::get_video_packet(){return impl_->get_video_packet();}\r
 319 std::shared_ptr<aligned_buffer> input::get_audio_packet(){return impl_->get_audio_packet();}\r
 320 double input::fps() const { return impl_->fps(); }\r
 321 }