git.sesse.net Git - casparcg/blob - modules/ffmpeg/consumer/ffmpeg_consumer.cpp

   1 /*\r
   2 * copyright (c) 2010 Sveriges Television AB <info@casparcg.com>\r
   3 *\r
   4 *  This ffmpeg 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  \r
  21 #include "../StdAfx.h"\r
  22 \r
  23 #include "ffmpeg_consumer.h"\r
  24 \r
  25 #include <core/mixer/read_frame.h>\r
  26 #include <core/consumer/frame_consumer.h>\r
  27 #include <core/video_format.h>\r
  28 \r
  29 #include <common/concurrency/executor.h>\r
  30 #include <common/utility/string.h>\r
  31 #include <common/env.h>\r
  32 \r
  33 #include <boost/thread/once.hpp>\r
  34 \r
  35 #include <tbb/cache_aligned_allocator.h>\r
  36 #include <tbb/parallel_invoke.h>\r
  37 \r
  38 #include <cstdio>\r
  39 \r
  40 #if defined(_MSC_VER)\r
  41 #pragma warning (push)\r
  42 #pragma warning (disable : 4244)\r
  43 #endif\r
  44 extern "C" \r
  45 {\r
  46         #define __STDC_CONSTANT_MACROS\r
  47         #define __STDC_LIMIT_MACROS\r
  48         #include <libavformat/avformat.h>\r
  49         #include <libswscale/swscale.h>\r
  50 }\r
  51 #if defined(_MSC_VER)\r
  52 #pragma warning (pop)\r
  53 #endif\r
  54 \r
  55 namespace caspar { \r
  56         \r
  57 struct ffmpeg_consumer : boost::noncopyable\r
  58 {               \r
  59         const std::string                                               filename_;\r
  60         const size_t                                                    bitrate_;\r
  61                 \r
  62         const std::shared_ptr<AVFormatContext>  oc_;\r
  63         const core::video_format_desc                   format_desc_;\r
  64         \r
  65         executor                                                                executor_;\r
  66 \r
  67         // Audio\r
  68         std::shared_ptr<AVStream>                               audio_st_;\r
  69         std::vector<uint8_t>                                    audio_outbuf_;\r
  70 \r
  71         std::vector<int16_t>                                    audio_input_buffer_;\r
  72 \r
  73         // Video\r
  74         std::shared_ptr<AVStream>                               video_st_;\r
  75         std::vector<uint8_t>                                    video_outbuf_;\r
  76 \r
  77         std::vector<uint8_t>                                    picture_buf_;\r
  78         std::shared_ptr<SwsContext>                             img_convert_ctx_;\r
  79         \r
  80 public:\r
  81         ffmpeg_consumer(const std::string& filename, const core::video_format_desc& format_desc, size_t bitrate)\r
  82                 : filename_(filename)\r
  83                 , bitrate_(bitrate)\r
  84                 , video_outbuf_(1920*1080*4)\r
  85                 , audio_outbuf_(48000)\r
  86                 , oc_(avformat_alloc_context(), av_free)\r
  87                 , format_desc_(format_desc)\r
  88                 , executor_(print())\r
  89         {\r
  90                 if (!oc_)\r
  91                 {\r
  92                         BOOST_THROW_EXCEPTION(caspar_exception()\r
  93                                 << msg_info("Could not alloc format-context")                           \r
  94                                 << boost::errinfo_api_function("avformat_alloc_context"));\r
  95                 }\r
  96 \r
  97                 executor_.set_capacity(core::consumer_buffer_depth());\r
  98 \r
  99                 oc_->oformat = av_guess_format(nullptr, filename_.c_str(), nullptr);\r
 100                 if (!oc_->oformat)\r
 101                         BOOST_THROW_EXCEPTION(caspar_exception() << msg_info("Could not find suitable output format."));\r
 102                 \r
 103                 std::copy_n(filename_.c_str(), filename_.size(), oc_->filename);\r
 104                                         \r
 105                 //  Add the audio and video streams using the default format codecs     and initialize the codecs .\r
 106                 if (oc_->oformat->video_codec != CODEC_ID_NONE)         \r
 107                         video_st_ = add_video_stream(oc_->oformat->video_codec);\r
 108                 \r
 109                 //if (oc_->oformat->audio_codec != CODEC_ID_NONE) \r
 110                 //      audio_st_ = add_audio_stream(oc_->oformat->audio_codec);        \r
 111 \r
 112                 // Set the output parameters (must be done even if no parameters).              \r
 113                 int errn = av_set_parameters(oc_.get(), nullptr);\r
 114                 if (errn < 0)\r
 115                 {\r
 116                         BOOST_THROW_EXCEPTION(\r
 117                                 file_read_error() << \r
 118                                 msg_info("Invalid output format parameters") <<\r
 119                                 boost::errinfo_api_function("avcodec_open") <<\r
 120                                 boost::errinfo_errno(AVUNERROR(errn)) <<\r
 121                                 boost::errinfo_file_name(filename_));\r
 122                 }\r
 123                 \r
 124                 dump_format(oc_.get(), 0, filename_.c_str(), 1);\r
 125 \r
 126                 // Now that all the parameters are set, we can open the audio and\r
 127                 // video codecs and allocate the necessary encode buffers.\r
 128                 if (video_st_)\r
 129                         open_video(video_st_);\r
 130                 \r
 131                 try\r
 132                 {\r
 133                         if (audio_st_)\r
 134                                 open_audio(audio_st_);\r
 135                 }\r
 136                 catch(...)\r
 137                 {\r
 138                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 139                         audio_st_ = nullptr;\r
 140                 }\r
 141  \r
 142                 // Open the output ffmpeg, if needed.\r
 143                 if (!(oc_->oformat->flags & AVFMT_NOFILE)) \r
 144                 {\r
 145                         int errn = url_fopen(&oc_->pb, filename_.c_str(), URL_WRONLY);\r
 146                         if (errn < 0) \r
 147                         {\r
 148                                 BOOST_THROW_EXCEPTION(\r
 149                                         file_not_found() << \r
 150                                         msg_info("Could not open file") <<\r
 151                                         boost::errinfo_api_function("url_fopen") <<\r
 152                                         boost::errinfo_errno(AVUNERROR(errn)) <<\r
 153                                         boost::errinfo_file_name(filename_));\r
 154                         }\r
 155                 }\r
 156                 \r
 157                 av_write_header(oc_.get()); // write the stream header, if any \r
 158 \r
 159                 CASPAR_LOG(info) << print() << L" Successfully initialized.";   \r
 160         }\r
 161 \r
 162         ~ffmpeg_consumer()\r
 163         {    \r
 164                 executor_.stop();\r
 165                 executor_.join();\r
 166 \r
 167                 audio_st_.reset();\r
 168                 video_st_.reset();\r
 169 \r
 170                 av_write_trailer(oc_.get());\r
 171                 \r
 172                 if (!(oc_->oformat->flags & AVFMT_NOFILE)) \r
 173                         url_fclose(oc_->pb); // Close the output ffmpeg.\r
 174         }\r
 175 \r
 176         const core::video_format_desc& get_video_format_desc() const\r
 177         {\r
 178                 return format_desc_;\r
 179         }\r
 180                 \r
 181         std::wstring print() const\r
 182         {\r
 183                 return L"ffmpeg[" + widen(filename_) + L"]";\r
 184         }\r
 185 \r
 186         std::shared_ptr<AVStream> add_video_stream(enum CodecID codec_id)\r
 187         { \r
 188                 auto st = av_new_stream(oc_.get(), 0);\r
 189                 if (!st) \r
 190                 {\r
 191                         BOOST_THROW_EXCEPTION(caspar_exception() \r
 192                                 << msg_info("Could not alloc video-stream")                             \r
 193                                 << boost::errinfo_api_function("av_new_stream"));\r
 194                 }\r
 195 \r
 196                 st->codec->codec_id                     = codec_id;\r
 197                 st->codec->codec_type           = AVMEDIA_TYPE_VIDEO;\r
 198                 st->codec->bit_rate                     = bitrate_;\r
 199                 st->codec->width                        = format_desc_.width;\r
 200                 st->codec->height                       = format_desc_.height;\r
 201                 st->codec->time_base.den        = format_desc_.time_scale;\r
 202                 st->codec->time_base.num        = format_desc_.duration;\r
 203                 st->codec->pix_fmt                      = st->codec->pix_fmt == -1 ? PIX_FMT_YUV420P : st->codec->pix_fmt;\r
 204  \r
 205                 return std::shared_ptr<AVStream>(st, [](AVStream* st)\r
 206                 {\r
 207                         avcodec_close(st->codec);\r
 208                         //av_freep(st);\r
 209                 });\r
 210         }\r
 211         \r
 212         std::shared_ptr<AVStream> add_audio_stream(enum CodecID codec_id)\r
 213         {\r
 214                 auto st = av_new_stream(oc_.get(), 1);\r
 215                 if (!st) \r
 216                 {\r
 217                         BOOST_THROW_EXCEPTION(caspar_exception() \r
 218                                 << msg_info("Could not alloc audio-stream")                             \r
 219                                 << boost::errinfo_api_function("av_new_stream"));\r
 220                 }\r
 221 \r
 222                 st->codec->codec_id             = codec_id;\r
 223                 st->codec->codec_type   = AVMEDIA_TYPE_AUDIO;\r
 224                 st->codec->sample_rate  = 48000;\r
 225                 st->codec->channels             = 2;\r
 226                 st->codec->sample_fmt   = SAMPLE_FMT_S16;\r
 227                 \r
 228                 return std::shared_ptr<AVStream>(st, [](AVStream* st)\r
 229                 {\r
 230                         avcodec_close(st->codec);\r
 231                         //av_freep(st);\r
 232                 });\r
 233         }\r
 234          \r
 235         void open_video(std::shared_ptr<AVStream>& st)\r
 236         {  \r
 237                 auto codec = avcodec_find_encoder(st->codec->codec_id);\r
 238                 if (!codec)\r
 239                         BOOST_THROW_EXCEPTION(caspar_exception() << msg_info("codec not found"));\r
 240                 \r
 241                 int errn = avcodec_open(st->codec, codec);\r
 242                 if (errn < 0)\r
 243                 {\r
 244                         BOOST_THROW_EXCEPTION(\r
 245                                 file_read_error() << \r
 246                                 msg_info("Could not open video codec.") <<\r
 247                                 boost::errinfo_api_function("avcodec_open") <<\r
 248                                 boost::errinfo_errno(AVUNERROR(errn)) <<\r
 249                                 boost::errinfo_file_name(filename_));           \r
 250                 }\r
 251         }\r
 252 \r
 253         void open_audio(std::shared_ptr<AVStream>& st)\r
 254         {\r
 255                 auto codec = avcodec_find_encoder(st->codec->codec_id);\r
 256                 if (!codec) \r
 257                         BOOST_THROW_EXCEPTION(caspar_exception() << msg_info("codec not found"));\r
 258                 \r
 259                 int errn = avcodec_open(st->codec, codec);\r
 260                 if (errn < 0)\r
 261                 {\r
 262                         BOOST_THROW_EXCEPTION(\r
 263                                 file_read_error() << \r
 264                                 msg_info("Could not open audio codec") <<\r
 265                                 boost::errinfo_api_function("avcodec_open") <<\r
 266                                 boost::errinfo_errno(AVUNERROR(errn)) <<\r
 267                                 boost::errinfo_file_name(filename_));\r
 268                 }\r
 269         }\r
 270   \r
 271         void encode_video_frame(const safe_ptr<core::read_frame>& frame)\r
 272         { \r
 273                 if(!video_st_)\r
 274                         return;\r
 275 \r
 276                 AVCodecContext* c = video_st_->codec;\r
 277  \r
 278                 if(!img_convert_ctx_) \r
 279                 {\r
 280                         img_convert_ctx_.reset(sws_getContext(format_desc_.width, format_desc_.height, PIX_FMT_BGRA, c->width, c->height, c->pix_fmt, SWS_BICUBIC, nullptr, nullptr, nullptr), sws_freeContext);\r
 281                         if (img_convert_ctx_ == nullptr) \r
 282                                 BOOST_THROW_EXCEPTION(caspar_exception() << msg_info("Cannot initialize the conversion context"));\r
 283                 }\r
 284 \r
 285                 std::shared_ptr<AVFrame> av_frame(avcodec_alloc_frame(), av_free);\r
 286                 avpicture_fill(reinterpret_cast<AVPicture*>(av_frame.get()), const_cast<uint8_t*>(frame->image_data().begin()), PIX_FMT_BGRA, format_desc_.width, format_desc_.height);\r
 287                                 \r
 288                 std::shared_ptr<AVFrame> local_av_frame(avcodec_alloc_frame(), av_free);\r
 289                 picture_buf_.resize(avpicture_get_size(c->pix_fmt, format_desc_.width, format_desc_.height));\r
 290                 avpicture_fill(reinterpret_cast<AVPicture*>(local_av_frame.get()), picture_buf_.data(), c->pix_fmt, format_desc_.width, format_desc_.height);\r
 291 \r
 292                 sws_scale(img_convert_ctx_.get(), av_frame->data, av_frame->linesize, 0, c->height, local_av_frame->data, local_av_frame->linesize);\r
 293                                 \r
 294                 int errn = avcodec_encode_video(c, video_outbuf_.data(), video_outbuf_.size(), local_av_frame.get());\r
 295                 if (errn < 0) \r
 296                 {\r
 297                         BOOST_THROW_EXCEPTION(\r
 298                                 invalid_operation() << \r
 299                                 msg_info("Could not encode video frame.") <<\r
 300                                 boost::errinfo_api_function("avcodec_encode_video") <<\r
 301                                 boost::errinfo_errno(AVUNERROR(errn)) <<\r
 302                                 boost::errinfo_file_name(filename_));\r
 303                 }\r
 304 \r
 305                 AVPacket pkt;\r
 306                 av_init_packet(&pkt);\r
 307                 pkt.size = errn;\r
 308 \r
 309                 // If zero size, it means the image was buffered.\r
 310                 if (errn > 0) \r
 311                 { \r
 312                         if (c->coded_frame->pts != AV_NOPTS_VALUE)\r
 313                                 pkt.pts = av_rescale_q(c->coded_frame->pts, c->time_base, video_st_->time_base);\r
 314                         \r
 315                         if(c->coded_frame->key_frame)\r
 316                                 pkt.flags |= AV_PKT_FLAG_KEY;\r
 317 \r
 318                         pkt.stream_index = video_st_->index;\r
 319                         pkt.data             = video_outbuf_.data();\r
 320 \r
 321                         if (av_interleaved_write_frame(oc_.get(), &pkt) != 0)\r
 322                                 BOOST_THROW_EXCEPTION(caspar_exception() << msg_info("Error while writing video frame"));\r
 323                 }               \r
 324         }\r
 325                 \r
 326         void encode_audio_frame(const safe_ptr<core::read_frame>& frame)\r
 327         {       \r
 328                 if(!audio_st_)\r
 329                         return;\r
 330 \r
 331                 if(!frame->audio_data().empty())\r
 332                         audio_input_buffer_.insert(audio_input_buffer_.end(), frame->audio_data().begin(), frame->audio_data().end());\r
 333                 else\r
 334                         audio_input_buffer_.insert(audio_input_buffer_.end(), 3840, 0);\r
 335 \r
 336                 while(encode_audio_packet()){}\r
 337         }\r
 338 \r
 339         bool encode_audio_packet()\r
 340         {               \r
 341                 auto c = audio_st_->codec;\r
 342 \r
 343                 auto frame_bytes = c->frame_size * 2 * 2; // samples per frame * 2 channels * 2 bytes per sample\r
 344                 if(static_cast<int>(audio_input_buffer_.size()) < frame_bytes/2)\r
 345                         return false;\r
 346 \r
 347                 AVPacket pkt;\r
 348                 av_init_packet(&pkt);\r
 349                 \r
 350                 int errn = avcodec_encode_audio(c, audio_outbuf_.data(), audio_outbuf_.size(), audio_input_buffer_.data());\r
 351                 if (errn < 0) \r
 352                 {\r
 353                         BOOST_THROW_EXCEPTION(\r
 354                                 invalid_operation() << \r
 355                                 msg_info("Could not encode audio samples.") <<\r
 356                                 boost::errinfo_api_function("avcodec_encode_audio") <<\r
 357                                 boost::errinfo_errno(AVUNERROR(errn)) <<\r
 358                                 boost::errinfo_file_name(filename_));\r
 359                 }\r
 360 \r
 361                 pkt.size = errn;\r
 362                 audio_input_buffer_ = std::vector<int16_t>(audio_input_buffer_.begin() + frame_bytes/2, audio_input_buffer_.end());\r
 363 \r
 364                 if (c->coded_frame && c->coded_frame->pts != AV_NOPTS_VALUE)\r
 365                         pkt.pts = av_rescale_q(c->coded_frame->pts, c->time_base, audio_st_->time_base);\r
 366 \r
 367                 pkt.flags                |= AV_PKT_FLAG_KEY;\r
 368                 pkt.stream_index = audio_st_->index;\r
 369                 pkt.data                 = audio_outbuf_.data();\r
 370                 \r
 371                 if (av_interleaved_write_frame(oc_.get(), &pkt) != 0)\r
 372                         BOOST_THROW_EXCEPTION(caspar_exception() << msg_info("Error while writing audio frame"));\r
 373 \r
 374                 return true;\r
 375         }\r
 376          \r
 377         void send(const safe_ptr<core::read_frame>& frame)\r
 378         {\r
 379                 executor_.begin_invoke([=]\r
 380                 {                               \r
 381                         encode_video_frame(frame);\r
 382                         encode_audio_frame(frame);\r
 383                 });\r
 384         }\r
 385 \r
 386         size_t buffer_depth() const { return 1; }\r
 387 };\r
 388 \r
 389 struct ffmpeg_consumer_proxy : public core::frame_consumer\r
 390 {\r
 391         const std::wstring filename_;\r
 392         const bool key_only_;\r
 393         const size_t bitrate_;\r
 394 \r
 395         std::unique_ptr<ffmpeg_consumer> consumer_;\r
 396 \r
 397 public:\r
 398 \r
 399         ffmpeg_consumer_proxy(const std::wstring& filename, bool key_only, size_t bitrate)\r
 400                 : filename_(filename)\r
 401                 , key_only_(key_only)\r
 402                 , bitrate_(bitrate){}\r
 403         \r
 404         virtual void initialize(const core::video_format_desc& format_desc)\r
 405         {\r
 406                 consumer_.reset(new ffmpeg_consumer(narrow(filename_), format_desc, bitrate_));\r
 407         }\r
 408         \r
 409         virtual void send(const safe_ptr<core::read_frame>& frame)\r
 410         {\r
 411                 consumer_->send(frame);\r
 412         }\r
 413         \r
 414         virtual std::wstring print() const\r
 415         {\r
 416                 return consumer_->print();\r
 417         }\r
 418 \r
 419         virtual bool key_only() const\r
 420         {\r
 421                 return key_only_;\r
 422         }\r
 423         \r
 424         virtual bool has_synchronization_clock() const \r
 425         {\r
 426                 return false;\r
 427         }\r
 428 \r
 429         virtual const core::video_format_desc& get_video_format_desc() const\r
 430         {\r
 431                 return consumer_->get_video_format_desc();\r
 432         }\r
 433 };      \r
 434 \r
 435 safe_ptr<core::frame_consumer> create_ffmpeg_consumer(const std::vector<std::wstring>& params)\r
 436 {\r
 437         if(params.size() < 2 || params[0] != L"FILE")\r
 438                 return core::frame_consumer::empty();\r
 439         \r
 440         // TODO: Ask stakeholders about case where file already exists.\r
 441         boost::filesystem::remove(boost::filesystem::wpath(env::media_folder() + params[1])); // Delete the file if it exists\r
 442         bool key_only = std::find(params.begin(), params.end(), L"KEY_ONLY") != params.end();\r
 443 \r
 444         return make_safe<ffmpeg_consumer_proxy>(env::media_folder() + params[1], key_only, 100000000);\r
 445 }\r
 446 \r
 447 safe_ptr<core::frame_consumer> create_ffmpeg_consumer(const boost::property_tree::ptree& ptree)\r
 448 {\r
 449         std::string filename = ptree.get<std::string>("path");\r
 450         bool key_only            = ptree.get("key-only", false);\r
 451         size_t bitrate           = ptree.get("bitrate", 100000000);\r
 452         \r
 453         return make_safe<ffmpeg_consumer_proxy>(env::media_folder() + widen(filename), key_only, bitrate);\r
 454 }\r
 455 \r
 456 }\r