git.sesse.net Git - casparcg/blob - modules/ffmpeg/producer/video/video_decoder.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 "video_decoder.h"\r
  23 #include "../../ffmpeg_error.h"\r
  24 \r
  25 #include <common/memory/memcpy.h>\r
  26 \r
  27 #include <core/video_format.h>\r
  28 #include <core/producer/frame/basic_frame.h>\r
  29 #include <core/mixer/write_frame.h>\r
  30 #include <core/producer/frame/image_transform.h>\r
  31 #include <core/producer/frame/pixel_format.h>\r
  32 #include <core/producer/frame/frame_factory.h>\r
  33 \r
  34 #include <tbb/parallel_for.h>\r
  35 \r
  36 #include <boost/range/algorithm_ext.hpp>\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 <libswscale/swscale.h>\r
  47         #include <libavformat/avformat.h>\r
  48         #include <libavcodec/avcodec.h>\r
  49 }\r
  50 #if defined(_MSC_VER)\r
  51 #pragma warning (pop)\r
  52 #endif\r
  53 \r
  54 namespace caspar {\r
  55         \r
  56 core::pixel_format::type get_pixel_format(PixelFormat pix_fmt)\r
  57 {\r
  58         switch(pix_fmt)\r
  59         {\r
  60         case PIX_FMT_GRAY8:             return core::pixel_format::gray;\r
  61         case PIX_FMT_BGRA:              return core::pixel_format::bgra;\r
  62         case PIX_FMT_ARGB:              return core::pixel_format::argb;\r
  63         case PIX_FMT_RGBA:              return core::pixel_format::rgba;\r
  64         case PIX_FMT_ABGR:              return core::pixel_format::abgr;\r
  65         case PIX_FMT_YUV444P:   return core::pixel_format::ycbcr;\r
  66         case PIX_FMT_YUV422P:   return core::pixel_format::ycbcr;\r
  67         case PIX_FMT_YUV420P:   return core::pixel_format::ycbcr;\r
  68         case PIX_FMT_YUV411P:   return core::pixel_format::ycbcr;\r
  69         case PIX_FMT_YUV410P:   return core::pixel_format::ycbcr;\r
  70         case PIX_FMT_YUVA420P:  return core::pixel_format::ycbcra;\r
  71         default:                                return core::pixel_format::invalid;\r
  72         }\r
  73 }\r
  74 \r
  75 core::pixel_format_desc get_pixel_format_desc(PixelFormat pix_fmt, size_t width, size_t height)\r
  76 {\r
  77         // Get linesizes\r
  78         AVPicture dummy_pict;   \r
  79         avpicture_fill(&dummy_pict, nullptr, pix_fmt, width, height);\r
  80 \r
  81         core::pixel_format_desc desc;\r
  82         desc.pix_fmt = get_pixel_format(pix_fmt);\r
  83                 \r
  84         switch(desc.pix_fmt)\r
  85         {\r
  86         case core::pixel_format::gray:\r
  87                 {\r
  88                         desc.planes.push_back(core::pixel_format_desc::plane(dummy_pict.linesize[0]/4, height, 1));                                             \r
  89                         return desc;\r
  90                 }\r
  91         case core::pixel_format::bgra:\r
  92         case core::pixel_format::argb:\r
  93         case core::pixel_format::rgba:\r
  94         case core::pixel_format::abgr:\r
  95                 {\r
  96                         desc.planes.push_back(core::pixel_format_desc::plane(dummy_pict.linesize[0]/4, height, 4));                                             \r
  97                         return desc;\r
  98                 }\r
  99         case core::pixel_format::ycbcr:\r
 100         case core::pixel_format::ycbcra:\r
 101                 {               \r
 102                         // Find chroma height\r
 103                         size_t size2 = dummy_pict.data[2] - dummy_pict.data[1];\r
 104                         size_t h2 = size2/dummy_pict.linesize[1];                       \r
 105 \r
 106                         desc.planes.push_back(core::pixel_format_desc::plane(dummy_pict.linesize[0], height, 1));\r
 107                         desc.planes.push_back(core::pixel_format_desc::plane(dummy_pict.linesize[1], h2, 1));\r
 108                         desc.planes.push_back(core::pixel_format_desc::plane(dummy_pict.linesize[2], h2, 1));\r
 109 \r
 110                         if(desc.pix_fmt == core::pixel_format::ycbcra)                                          \r
 111                                 desc.planes.push_back(core::pixel_format_desc::plane(dummy_pict.linesize[3], height, 1));       \r
 112                         return desc;\r
 113                 }               \r
 114         default:                \r
 115                 desc.pix_fmt = core::pixel_format::invalid;\r
 116                 return desc;\r
 117         }\r
 118 }\r
 119 \r
 120 struct video_decoder::implementation : boost::noncopyable\r
 121 {\r
 122         input& input_;\r
 123         std::shared_ptr<SwsContext>                                     sws_context_;\r
 124         const std::shared_ptr<core::frame_factory>      frame_factory_;\r
 125         AVCodecContext&                                                         codec_context_;\r
 126         const int                                                                       width_;\r
 127         const int                                                                       height_;\r
 128         const PixelFormat                                                       pix_fmt_;\r
 129         core::pixel_format_desc                                         desc_;\r
 130         size_t                                                                          frame_number_;\r
 131 \r
 132 public:\r
 133         explicit implementation(input& input, const safe_ptr<core::frame_factory>& frame_factory) \r
 134                 : input_(input)\r
 135                 , frame_factory_(frame_factory)\r
 136                 , codec_context_(*input_.get_video_codec_context())\r
 137                 , width_(codec_context_.width)\r
 138                 , height_(codec_context_.height)\r
 139                 , pix_fmt_(codec_context_.pix_fmt)\r
 140                 , desc_(get_pixel_format_desc(pix_fmt_, width_, height_))\r
 141                 , frame_number_(0)\r
 142         {\r
 143                 if(desc_.pix_fmt == core::pixel_format::invalid)\r
 144                 {\r
 145                         CASPAR_LOG(warning) << "Hardware accelerated color transform not supported.";\r
 146 \r
 147                         desc_ = get_pixel_format_desc(PIX_FMT_BGRA, width_, height_);\r
 148                         double param;\r
 149                         sws_context_.reset(sws_getContext(width_, height_, pix_fmt_, width_, height_, PIX_FMT_BGRA, SWS_BILINEAR, nullptr, nullptr, &param), sws_freeContext);\r
 150                         if(!sws_context_)\r
 151                                 BOOST_THROW_EXCEPTION(operation_failed() <<\r
 152                                                                           msg_info("Could not create software scaling context.") << \r
 153                                                                           boost::errinfo_api_function("sws_getContext"));\r
 154                 }\r
 155         }\r
 156 \r
 157         std::deque<std::pair<int, safe_ptr<core::write_frame>>> receive()\r
 158         {\r
 159                 std::deque<std::pair<int, safe_ptr<core::write_frame>>> result;\r
 160                 \r
 161                 std::shared_ptr<AVPacket> pkt;\r
 162                 for(int n = 0; n < 32 && result.empty() && input_.try_pop_video_packet(pkt); ++n)       \r
 163                         boost::range::push_back(result, decode(pkt));\r
 164 \r
 165                 return result;\r
 166         }\r
 167 \r
 168         std::deque<std::pair<int, safe_ptr<core::write_frame>>> decode(const std::shared_ptr<AVPacket>& video_packet)\r
 169         {                       \r
 170                 std::deque<std::pair<int, safe_ptr<core::write_frame>>> result;\r
 171 \r
 172                 if(!video_packet) // eof\r
 173                 {       \r
 174                         avcodec_flush_buffers(&codec_context_);\r
 175                         frame_number_ = 0;\r
 176                         return result;\r
 177                 }\r
 178 \r
 179                 safe_ptr<AVFrame> decoded_frame(avcodec_alloc_frame(), av_free);\r
 180 \r
 181                 int frame_finished = 0;\r
 182                 const int errn = avcodec_decode_video2(&codec_context_, decoded_frame.get(), &frame_finished, video_packet.get());\r
 183                 \r
 184                 if(errn < 0)\r
 185                 {\r
 186                         BOOST_THROW_EXCEPTION(\r
 187                                 invalid_operation() <<\r
 188                                 msg_info(av_error_str(errn)) <<\r
 189                                 boost::errinfo_api_function("avcodec_decode_video") <<\r
 190                                 boost::errinfo_errno(AVUNERROR(errn)));\r
 191                 }\r
 192                 \r
 193                 if(frame_finished != 0)         \r
 194                         result.push_back(std::make_pair(frame_number_++, make_write_frame(decoded_frame)));\r
 195 \r
 196                 return result;\r
 197         }\r
 198 \r
 199         safe_ptr<core::write_frame> make_write_frame(safe_ptr<AVFrame> decoded_frame)\r
 200         {               \r
 201                 auto write = frame_factory_->create_frame(this, desc_);\r
 202                 write->set_is_interlaced(decoded_frame->interlaced_frame != 0);\r
 203 \r
 204                 if(sws_context_ == nullptr)\r
 205                 {\r
 206                         tbb::parallel_for(0, static_cast<int>(desc_.planes.size()), 1, [&](int n)\r
 207                         {\r
 208                                 auto plane            = desc_.planes[n];\r
 209                                 auto result           = write->image_data(n).begin();\r
 210                                 auto decoded          = decoded_frame->data[n];\r
 211                                 auto decoded_linesize = decoded_frame->linesize[n];\r
 212                                 \r
 213                                 // Copy line by line since ffmpeg sometimes pads each line.\r
 214                                 tbb::parallel_for(tbb::blocked_range<size_t>(0, static_cast<int>(desc_.planes[n].height)), [&](const tbb::blocked_range<size_t>& r)\r
 215                                 {\r
 216                                         for(size_t y = r.begin(); y != r.end(); ++y)\r
 217                                                 memcpy(result + y*plane.linesize, decoded + y*decoded_linesize, plane.linesize);\r
 218                                 });\r
 219 \r
 220                                 write->commit(n);\r
 221                         });\r
 222                 }\r
 223                 else\r
 224                 {\r
 225                         // Use sws_scale when provided colorspace has no hw-accel.\r
 226                         safe_ptr<AVFrame> av_frame(avcodec_alloc_frame(), av_free);     \r
 227                         avcodec_get_frame_defaults(av_frame.get());                     \r
 228                         avpicture_fill(reinterpret_cast<AVPicture*>(av_frame.get()), write->image_data().begin(), PIX_FMT_BGRA, width_, height_);\r
 229                  \r
 230                         sws_scale(sws_context_.get(), decoded_frame->data, decoded_frame->linesize, 0, height_, av_frame->data, av_frame->linesize);    \r
 231 \r
 232                         write->commit();\r
 233                 }       \r
 234 \r
 235                 // DVVIDEO is in lower field. Make it upper field if needed.\r
 236                 if(codec_context_.codec_id == CODEC_ID_DVVIDEO && frame_factory_->get_video_format_desc().mode == core::video_mode::upper)\r
 237                         write->get_image_transform().set_fill_translation(0.0f, 0.5/static_cast<double>(height_));\r
 238 \r
 239                 return write;\r
 240         }\r
 241 };\r
 242 \r
 243 video_decoder::video_decoder(input& input, const safe_ptr<core::frame_factory>& frame_factory) : impl_(new implementation(input, frame_factory)){}\r
 244 std::deque<std::pair<int, safe_ptr<core::write_frame>>> video_decoder::receive(){return impl_->receive();}\r
 245 \r
 246 }