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 \r
  24 #include <common/memory/safe_ptr.h>\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/producer/frame/write_frame.h>\r
  30 #include <core/producer/frame/image_transform.h>\r
  31 \r
  32 #include <tbb/parallel_for.h>\r
  33 \r
  34 #include <algorithm>\r
  35 \r
  36 #if defined(_MSC_VER)\r
  37 #pragma warning (push)\r
  38 #pragma warning (disable : 4244)\r
  39 #endif\r
  40 extern "C" \r
  41 {\r
  42         #define __STDC_CONSTANT_MACROS\r
  43         #define __STDC_LIMIT_MACROS\r
  44         #include <libswscale/swscale.h>\r
  45         #include <libavformat/avformat.h>\r
  46 }\r
  47 #if defined(_MSC_VER)\r
  48 #pragma warning (pop)\r
  49 #endif\r
  50 \r
  51 namespace caspar {\r
  52         \r
  53 core::pixel_format::type get_pixel_format(PixelFormat pix_fmt)\r
  54 {\r
  55         switch(pix_fmt)\r
  56         {\r
  57                 case PIX_FMT_BGRA:              return core::pixel_format::bgra;\r
  58                 case PIX_FMT_ARGB:              return core::pixel_format::argb;\r
  59                 case PIX_FMT_RGBA:              return core::pixel_format::rgba;\r
  60                 case PIX_FMT_ABGR:              return core::pixel_format::abgr;\r
  61                 case PIX_FMT_YUV444P:   return core::pixel_format::ycbcr;\r
  62                 case PIX_FMT_YUV422P:   return core::pixel_format::ycbcr;\r
  63                 case PIX_FMT_YUV420P:   return core::pixel_format::ycbcr;\r
  64                 case PIX_FMT_YUV411P:   return core::pixel_format::ycbcr;\r
  65                 case PIX_FMT_YUV410P:   return core::pixel_format::ycbcr;\r
  66                 case PIX_FMT_YUVA420P:  return core::pixel_format::ycbcra;\r
  67                 default:                                return core::pixel_format::invalid;\r
  68         }\r
  69 }\r
  70 \r
  71 core::pixel_format_desc get_pixel_format_desc(PixelFormat pix_fmt, size_t width, size_t height)\r
  72 {\r
  73         // Get linesizes\r
  74         AVPicture dummy_pict;   \r
  75         avpicture_fill(&dummy_pict, nullptr, pix_fmt, width, height);\r
  76 \r
  77         core::pixel_format_desc desc;\r
  78         desc.pix_fmt = get_pixel_format(pix_fmt);\r
  79                 \r
  80         switch(desc.pix_fmt)\r
  81         {\r
  82         case core::pixel_format::bgra:\r
  83         case core::pixel_format::argb:\r
  84         case core::pixel_format::rgba:\r
  85         case core::pixel_format::abgr:\r
  86                 {\r
  87                         desc.planes.push_back(core::pixel_format_desc::plane(dummy_pict.linesize[0]/4, height, 4));                                             \r
  88                         return desc;\r
  89                 }\r
  90         case core::pixel_format::ycbcr:\r
  91         case core::pixel_format::ycbcra:\r
  92                 {               \r
  93                         // Find chroma height\r
  94                         size_t size2 = dummy_pict.data[2] - dummy_pict.data[1];\r
  95                         size_t h2 = size2/dummy_pict.linesize[1];                       \r
  96 \r
  97                         desc.planes.push_back(core::pixel_format_desc::plane(dummy_pict.linesize[0], height, 1));\r
  98                         desc.planes.push_back(core::pixel_format_desc::plane(dummy_pict.linesize[1], h2, 1));\r
  99                         desc.planes.push_back(core::pixel_format_desc::plane(dummy_pict.linesize[2], h2, 1));\r
 100 \r
 101                         if(desc.pix_fmt == core::pixel_format::ycbcra)                                          \r
 102                                 desc.planes.push_back(core::pixel_format_desc::plane(dummy_pict.linesize[3], height, 1));       \r
 103                         return desc;\r
 104                 }               \r
 105         default:                \r
 106                 desc.pix_fmt = core::pixel_format::invalid;\r
 107                 return desc;\r
 108         }\r
 109 }\r
 110 \r
 111 struct video_decoder::implementation : boost::noncopyable\r
 112 {       \r
 113         std::shared_ptr<core::frame_factory> frame_factory_;\r
 114         std::shared_ptr<SwsContext> sws_context_;\r
 115 \r
 116         AVCodecContext* codec_context_;\r
 117 \r
 118         const int width_;\r
 119         const int height_;\r
 120         const PixelFormat pix_fmt_;\r
 121         core::pixel_format_desc desc_;\r
 122 \r
 123 public:\r
 124         explicit implementation(AVCodecContext* codec_context, const safe_ptr<core::frame_factory>& frame_factory) \r
 125                 : frame_factory_(frame_factory)\r
 126                 , codec_context_(codec_context)\r
 127                 , width_(codec_context_->width)\r
 128                 , height_(codec_context_->height)\r
 129                 , pix_fmt_(codec_context_->pix_fmt)\r
 130                 , desc_(get_pixel_format_desc(pix_fmt_, width_, height_))\r
 131         {\r
 132                 if(desc_.pix_fmt == core::pixel_format::invalid)\r
 133                 {\r
 134                         CASPAR_LOG(warning) << "Hardware accelerated color transform not supported.";\r
 135 \r
 136                         desc_ = get_pixel_format_desc(PIX_FMT_BGRA, width_, height_);\r
 137                         double param;\r
 138                         sws_context_.reset(sws_getContext(width_, height_, pix_fmt_, width_, height_, PIX_FMT_BGRA, SWS_BILINEAR, nullptr, nullptr, &param), sws_freeContext);\r
 139                         if(!sws_context_)\r
 140                                 BOOST_THROW_EXCEPTION(operation_failed() <<\r
 141                                                                           msg_info("Could not create software scaling context.") << \r
 142                                                                           boost::errinfo_api_function("sws_getContext"));\r
 143                 }\r
 144         }\r
 145         \r
 146         safe_ptr<core::write_frame> execute(void* tag, const aligned_buffer& video_packet)\r
 147         {                               \r
 148                 safe_ptr<AVFrame> decoded_frame(avcodec_alloc_frame(), av_free);\r
 149 \r
 150                 int frame_finished = 0;\r
 151                 const int result = avcodec_decode_video(codec_context_, decoded_frame.get(), &frame_finished, video_packet.data(), video_packet.size());\r
 152                 \r
 153                 if(result < 0)\r
 154                         BOOST_THROW_EXCEPTION(invalid_operation() << msg_info("avcodec_decode_video failed"));\r
 155                 \r
 156                 auto write = frame_factory_->create_frame(tag, desc_);\r
 157                 if(sws_context_ == nullptr)\r
 158                 {\r
 159                         tbb::parallel_for(0, static_cast<int>(desc_.planes.size()), 1, [&](int n)\r
 160                         {\r
 161                                 auto plane            = desc_.planes[n];\r
 162                                 auto result           = write->image_data(n).begin();\r
 163                                 auto decoded          = decoded_frame->data[n];\r
 164                                 auto decoded_linesize = decoded_frame->linesize[n];\r
 165                                 \r
 166                                 // Copy line by line since ffmpeg sometimes pads each line.\r
 167                                 tbb::parallel_for(0, static_cast<int>(desc_.planes[n].height), 1, [&](int y)\r
 168                                 {\r
 169                                         fast_memcpy(result + y*plane.linesize, decoded + y*decoded_linesize, plane.linesize);\r
 170                                 });\r
 171                         });\r
 172                 }\r
 173                 else\r
 174                 {\r
 175                         // Uses sws_scale when we don't support the provided color-space.\r
 176                         safe_ptr<AVFrame> av_frame(avcodec_alloc_frame(), av_free);     \r
 177                         avcodec_get_frame_defaults(av_frame.get());                     \r
 178                         avpicture_fill(reinterpret_cast<AVPicture*>(av_frame.get()), write->image_data().begin(), PIX_FMT_BGRA, width_, height_);\r
 179                  \r
 180                         sws_scale(sws_context_.get(), decoded_frame->data, decoded_frame->linesize, 0, height_, av_frame->data, av_frame->linesize);    \r
 181                 }       \r
 182 \r
 183                 // DVVIDEO is in lower field. Make it upper field if needed.\r
 184                 if(codec_context_->codec_id == CODEC_ID_DVVIDEO && frame_factory_->get_video_format_desc().mode == core::video_mode::upper)\r
 185                         write->get_image_transform().set_fill_translation(0.0f, 1.0/static_cast<double>(height_));\r
 186 \r
 187                 return write;\r
 188         }\r
 189 };\r
 190 \r
 191 video_decoder::video_decoder(AVCodecContext* codec_context, const safe_ptr<core::frame_factory>& frame_factory) : impl_(new implementation(codec_context, frame_factory)){}\r
 192 safe_ptr<core::write_frame> video_decoder::execute(void* tag, const aligned_buffer& video_packet){return impl_->execute(tag, video_packet);}\r
 193 \r
 194 }