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