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