git.sesse.net Git - casparcg/blob - modules/ffmpeg/producer/input/input.cpp

   1 /*\r
   2 * Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>\r
   3 *\r
   4 * This file is part of CasparCG (www.casparcg.com).\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 * Author: Robert Nagy, ronag89@gmail.com\r
  20 */\r
  21 \r
  22 #include "../../stdafx.h"\r
  23 \r
  24 #include "input.h"\r
  25 \r
  26 #include "../util/util.h"\r
  27 #include "../../ffmpeg_error.h"\r
  28 \r
  29 #include <common/diagnostics/graph.h>\r
  30 #include <common/executor.h>\r
  31 #include <common/lock.h>\r
  32 #include <common/except.h>\r
  33 #include <common/log.h>\r
  34 \r
  35 #include <core/video_format.h>\r
  36 \r
  37 #include <tbb/concurrent_queue.h>\r
  38 #include <tbb/atomic.h>\r
  39 #include <tbb/recursive_mutex.h>\r
  40 \r
  41 #include <boost/range/algorithm.hpp>\r
  42 #include <boost/thread/condition_variable.hpp>\r
  43 #include <boost/thread/mutex.hpp>\r
  44 #include <boost/thread/thread.hpp>\r
  45 \r
  46 #if defined(_MSC_VER)\r
  47 #pragma warning (push)\r
  48 #pragma warning (disable : 4244)\r
  49 #endif\r
  50 extern "C" \r
  51 {\r
  52         #define __STDC_CONSTANT_MACROS\r
  53         #define __STDC_LIMIT_MACROS\r
  54         #include <libavformat/avformat.h>\r
  55 }\r
  56 #if defined(_MSC_VER)\r
  57 #pragma warning (pop)\r
  58 #endif\r
  59 \r
  60 namespace caspar { namespace ffmpeg {\r
  61 \r
  62 static const int MIN_FRAMES = 25;\r
  63 \r
  64 class stream\r
  65 {\r
  66         stream(const stream&);\r
  67         stream& operator=(const stream&);\r
  68 \r
  69         typedef tbb::concurrent_bounded_queue<std::shared_ptr<AVPacket>>::size_type size_type;\r
  70 \r
  71         int                                                                                                              index_;\r
  72         tbb::concurrent_bounded_queue<std::shared_ptr<AVPacket>> packets_;\r
  73 public:\r
  74 \r
  75         stream(int index) \r
  76                 : index_(index)\r
  77         {\r
  78         }\r
  79         \r
  80         void push(const std::shared_ptr<AVPacket>& packet)\r
  81         {\r
  82                 if(packet && packet->data && packet->stream_index != index_)\r
  83                         return;\r
  84 \r
  85                 packets_.push(packet);\r
  86         }\r
  87 \r
  88         bool try_pop(std::shared_ptr<AVPacket>& packet)\r
  89         {\r
  90                 return packets_.try_pop(packet);\r
  91         }\r
  92 \r
  93         void clear()\r
  94         {\r
  95                 std::shared_ptr<AVPacket> packet;\r
  96                 while(packets_.try_pop(packet));\r
  97         }\r
  98                 \r
  99         size_type size() const\r
 100         {\r
 101                 return index_ != -1 ? packets_.size() : std::numeric_limits<size_type>::max();\r
 102         }\r
 103 };\r
 104                 \r
 105 struct input::impl : boost::noncopyable\r
 106 {               \r
 107         const spl::shared_ptr<diagnostics::graph>                                       graph_;\r
 108 \r
 109         const spl::shared_ptr<AVFormatContext>                                          format_context_; // Destroy this last\r
 110         const int                                                                                                       default_stream_index_;\r
 111                         \r
 112         const std::wstring                                                                                      filename_;\r
 113         tbb::atomic<uint32_t>                                                                           start_;         \r
 114         tbb::atomic<uint32_t>                                                                           length_;\r
 115         tbb::atomic<bool>                                                                                       loop_;\r
 116         double                                                                                                          fps_;\r
 117         uint32_t                                                                                                        frame_number_;\r
 118         \r
 119         stream                                                                                                          video_stream_;\r
 120         stream                                                                                                          audio_stream_;\r
 121 \r
 122         boost::optional<uint32_t>                                                                       seek_target_;\r
 123 \r
 124         tbb::atomic<bool>                                                                                       is_running_;\r
 125         boost::mutex                                                                                            mutex_;\r
 126         boost::condition_variable                                                                       cond_;\r
 127         boost::thread                                                                                           thread_;\r
 128         \r
 129         impl(const spl::shared_ptr<diagnostics::graph> graph, const std::wstring& filename, const bool loop, const uint32_t start, const uint32_t length) \r
 130                 : graph_(graph)\r
 131                 , format_context_(open_input(filename))         \r
 132                 , default_stream_index_(av_find_default_stream_index(format_context_.get()))\r
 133                 , filename_(filename)\r
 134                 , frame_number_(0)\r
 135                 , fps_(read_fps(*format_context_, 0.0))\r
 136                 , video_stream_(av_find_best_stream(format_context_.get(), AVMEDIA_TYPE_VIDEO, -1, -1, 0, 0))\r
 137                 , audio_stream_(av_find_best_stream(format_context_.get(), AVMEDIA_TYPE_AUDIO, -1, -1, 0, 0))\r
 138         {               \r
 139                 start_                  = start;\r
 140                 length_                 = length;\r
 141                 loop_                   = loop;\r
 142                 is_running_             = true;\r
 143 \r
 144                 if(start_ != 0)\r
 145                         seek_target_ = start_;\r
 146                                                                                                                 \r
 147                 graph_->set_color("seek", diagnostics::color(1.0f, 0.5f, 0.0f));        \r
 148                 graph_->set_color("audio-buffer", diagnostics::color(0.7f, 0.4f, 0.4f));\r
 149                 graph_->set_color("video-buffer", diagnostics::color(1.0f, 1.0f, 0.0f));        \r
 150                 \r
 151                 thread_                 = boost::thread([this]{run();});\r
 152         }\r
 153 \r
 154         ~impl()\r
 155         {\r
 156                 is_running_ = false;\r
 157                 cond_.notify_one();\r
 158                 thread_.join();\r
 159         }\r
 160         \r
 161         bool try_pop_video(std::shared_ptr<AVPacket>& packet)\r
 162         {                               \r
 163                 bool result = video_stream_.try_pop(packet);\r
 164                 if(result)\r
 165                         cond_.notify_one();\r
 166                 \r
 167                 graph_->set_value("video-buffer", std::min(1.0, static_cast<double>(video_stream_.size()/MIN_FRAMES)));\r
 168                                 \r
 169                 return result;\r
 170         }\r
 171         \r
 172         bool try_pop_audio(std::shared_ptr<AVPacket>& packet)\r
 173         {                               \r
 174                 bool result = audio_stream_.try_pop(packet);\r
 175                 if(result)\r
 176                         cond_.notify_one();\r
 177                                 \r
 178                 graph_->set_value("audio-buffer", std::min(1.0, static_cast<double>(audio_stream_.size()/MIN_FRAMES)));\r
 179 \r
 180                 return result;\r
 181         }\r
 182 \r
 183         void seek(uint32_t target)\r
 184         {\r
 185                 {\r
 186                         boost::lock_guard<boost::mutex> lock(mutex_);\r
 187 \r
 188                         seek_target_ = target;\r
 189                         video_stream_.clear();\r
 190                         audio_stream_.clear();\r
 191                 }\r
 192                 \r
 193                 cond_.notify_one();\r
 194         }\r
 195                 \r
 196         std::wstring print() const\r
 197         {\r
 198                 return L"ffmpeg_input[" + filename_ + L")]";\r
 199         }\r
 200 \r
 201 private:\r
 202         void internal_seek(uint32_t target)\r
 203         {\r
 204                 CASPAR_LOG(debug) << print() << " Seeking: " << target;\r
 205 \r
 206                 int flags = AVSEEK_FLAG_FRAME;\r
 207                 if(target == 0)\r
 208                 {\r
 209                         // Fix VP6 seeking\r
 210                         int vid_stream_index = av_find_best_stream(format_context_.get(), AVMEDIA_TYPE_VIDEO, -1, -1, 0, 0);\r
 211                         if(vid_stream_index >= 0)\r
 212                         {\r
 213                                 auto codec_id = format_context_->streams[vid_stream_index]->codec->codec_id;\r
 214                                 if(codec_id == CODEC_ID_VP6A || codec_id == CODEC_ID_VP6F || codec_id == CODEC_ID_VP6)\r
 215                                         flags = AVSEEK_FLAG_BYTE;\r
 216                         }\r
 217                 }\r
 218                 \r
 219                 auto stream = format_context_->streams[default_stream_index_];\r
 220                 auto codec  = stream->codec;\r
 221                 auto fixed_target = (target*stream->time_base.den*codec->time_base.num)/(stream->time_base.num*codec->time_base.den)*codec->ticks_per_frame;\r
 222                 \r
 223                 THROW_ON_ERROR2(avformat_seek_file(format_context_.get(), default_stream_index_, std::numeric_limits<int64_t>::min(), fixed_target, fixed_target, 0), print());         \r
 224                 \r
 225                 video_stream_.push(nullptr);\r
 226                 audio_stream_.push(nullptr);\r
 227         }\r
 228                 \r
 229         bool full() const\r
 230         {\r
 231                 return video_stream_.size() > MIN_FRAMES && audio_stream_.size() > MIN_FRAMES;\r
 232         }\r
 233 \r
 234         void tick()\r
 235         {\r
 236                 if(seek_target_)                                \r
 237                 {\r
 238                         internal_seek(*seek_target_);\r
 239                         seek_target_.reset();\r
 240                 }\r
 241 \r
 242                 auto packet = create_packet();\r
 243                 \r
 244                 auto ret = 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
 245                 \r
 246                 if(is_eof(ret))                                                                                                              \r
 247                 {\r
 248                         std::shared_ptr<AVPacket> eof_packet(new AVPacket());\r
 249                         memset(eof_packet.get(), 0, sizeof(AVPacket));\r
 250                         av_init_packet(eof_packet.get());\r
 251 \r
 252                         video_stream_.push(eof_packet);\r
 253                         audio_stream_.push(eof_packet);\r
 254 \r
 255                         if(loop_)\r
 256                         {\r
 257                                 internal_seek(start_);\r
 258                                 graph_->set_tag("seek");                \r
 259                         }\r
 260                 }\r
 261                 else\r
 262                 {               \r
 263                         THROW_ON_ERROR(ret, "av_read_frame", print());\r
 264                                         \r
 265                         THROW_ON_ERROR2(av_dup_packet(packet.get()), print());\r
 266                                 \r
 267                         // Make sure that the packet is correctly deallocated even if size and data is modified during decoding.\r
 268                         auto size = packet->size;\r
 269                         auto data = packet->data;\r
 270                         \r
 271                         packet = spl::shared_ptr<AVPacket>(packet.get(), [packet, size, data](AVPacket*)\r
 272                         {\r
 273                                 packet->size = size;\r
 274                                 packet->data = data;                            \r
 275                         });\r
 276                                         \r
 277                         auto stream_time_base = format_context_->streams[packet->stream_index]->time_base;\r
 278                         auto packet_frame_number = static_cast<uint32_t>((static_cast<double>(packet->pts * stream_time_base.num)/stream_time_base.den)*fps_);\r
 279 \r
 280                         if(packet->stream_index == default_stream_index_)\r
 281                                 frame_number_ = packet_frame_number;\r
 282                                         \r
 283                         if(packet_frame_number >= start_ && packet_frame_number < length_)\r
 284                         {\r
 285                                 video_stream_.push(packet);\r
 286                                 audio_stream_.push(packet);\r
 287                                                 \r
 288                                 graph_->set_value("video-buffer", std::min(1.0, static_cast<double>(video_stream_.size()/MIN_FRAMES)));\r
 289                                 graph_->set_value("audio-buffer", std::min(1.0, static_cast<double>(audio_stream_.size()/MIN_FRAMES)));\r
 290                         }\r
 291                 }       \r
 292         }\r
 293 \r
 294         void run()\r
 295         {\r
 296                 win32_exception::install_handler();\r
 297 \r
 298                 while(is_running_)\r
 299                 {\r
 300                         try\r
 301                         {\r
 302                                 boost::this_thread::sleep(boost::posix_time::milliseconds(1));\r
 303                                 \r
 304                                 {\r
 305                                         boost::unique_lock<boost::mutex> lock(mutex_);\r
 306 \r
 307                                         while(full() && !seek_target_ && is_running_)\r
 308                                                 cond_.wait(lock);\r
 309                                         \r
 310                                         tick();\r
 311                                 }\r
 312                         }\r
 313                         catch(...)\r
 314                         {\r
 315                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
 316                                 is_running_ = false;\r
 317                         }\r
 318                 }\r
 319         }\r
 320                         \r
 321         bool is_eof(int ret)\r
 322         {\r
 323                 #pragma warning (disable : 4146)\r
 324 \r
 325                 //if(ret == AVERROR(EIO))\r
 326                 //      CASPAR_LOG(trace) << print() << " Received EIO, assuming EOF. ";\r
 327                 //if(ret == AVERROR_EOF)\r
 328                 //      CASPAR_LOG(trace) << print() << " Received EOF. ";\r
 329 \r
 330                 return ret == AVERROR_EOF || ret == AVERROR(EIO) || frame_number_ > length_; // av_read_frame doesn't always correctly return AVERROR_EOF;\r
 331         }\r
 332 };\r
 333 \r
 334 input::input(const spl::shared_ptr<diagnostics::graph>& graph, const std::wstring& filename, bool loop, uint32_t start, uint32_t length) \r
 335         : impl_(new impl(graph, filename, loop, start, length)){}\r
 336 bool input::try_pop_video(std::shared_ptr<AVPacket>& packet){return impl_->try_pop_video(packet);}\r
 337 bool input::try_pop_audio(std::shared_ptr<AVPacket>& packet){return impl_->try_pop_audio(packet);}\r
 338 AVFormatContext& input::context(){return *impl_->format_context_;}\r
 339 void input::loop(bool value){impl_->loop_ = value;}\r
 340 bool input::loop() const{return impl_->loop_;}\r
 341 void input::seek(uint32_t target){impl_->seek(target);}\r
 342 void input::start(uint32_t value){impl_->start_ = value;}\r
 343 uint32_t input::start() const{return impl_->start_;}\r
 344 void input::length(uint32_t value){impl_->length_ = value;}\r
 345 uint32_t input::length() const{return impl_->length_;}\r
 346 }}\r