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/memcpy.h>\r
  25 \r
  26 #include <core/video_format.h>\r
  27 #include <core/producer/frame/basic_frame.h>\r
  28 #include <core/producer/frame/write_frame.h>\r
  29 #include <core/producer/frame/image_transform.h>\r
  30 \r
  31 #include <tbb/parallel_for.h>\r
  32 \r
  33 #if defined(_MSC_VER)\r
  34 #pragma warning (push)\r
  35 #pragma warning (disable : 4244)\r
  36 #endif\r
  37 extern "C" \r
  38 {\r
  39         #define __STDC_CONSTANT_MACROS\r
  40         #define __STDC_LIMIT_MACROS\r
  41         #include <libswscale/swscale.h>\r
  42         #include <libavformat/avformat.h>\r
  43 }\r
  44 #if defined(_MSC_VER)\r
  45 #pragma warning (pop)\r
  46 #endif\r
  47 \r
  48 namespace caspar {\r
  49         \r
  50 core::pixel_format::type get_pixel_format(PixelFormat pix_fmt)\r
  51 {\r
  52         switch(pix_fmt)\r
  53         {\r
  54                 case PIX_FMT_GRAY8:             return core::pixel_format::gray;\r
  55                 case PIX_FMT_BGRA:              return core::pixel_format::bgra;\r
  56                 case PIX_FMT_ARGB:              return core::pixel_format::argb;\r
  57                 case PIX_FMT_RGBA:              return core::pixel_format::rgba;\r
  58                 case PIX_FMT_ABGR:              return core::pixel_format::abgr;\r
  59                 case PIX_FMT_YUV444P:   return core::pixel_format::ycbcr;\r
  60                 case PIX_FMT_YUV422P:   return core::pixel_format::ycbcr;\r
  61                 case PIX_FMT_YUV420P:   return core::pixel_format::ycbcr;\r
  62                 case PIX_FMT_YUV411P:   return core::pixel_format::ycbcr;\r
  63                 case PIX_FMT_YUV410P:   return core::pixel_format::ycbcr;\r
  64                 case PIX_FMT_YUVA420P:  return core::pixel_format::ycbcra;\r
  65                 default:                                return core::pixel_format::invalid;\r
  66         }\r
  67 }\r
  68 \r
  69 core::pixel_format_desc get_pixel_format_desc(PixelFormat pix_fmt, size_t width, size_t height)\r
  70 {\r
  71         // Get linesizes\r
  72         AVPicture dummy_pict;   \r
  73         avpicture_fill(&dummy_pict, nullptr, pix_fmt, width, height);\r
  74 \r
  75         core::pixel_format_desc desc;\r
  76         desc.pix_fmt = get_pixel_format(pix_fmt);\r
  77                 \r
  78         switch(desc.pix_fmt)\r
  79         {\r
  80         case core::pixel_format::gray:\r
  81                 {\r
  82                         desc.planes.push_back(core::pixel_format_desc::plane(dummy_pict.linesize[0]/4, height, 1));                                             \r
  83                         return desc;\r
  84                 }\r
  85         case core::pixel_format::bgra:\r
  86         case core::pixel_format::argb:\r
  87         case core::pixel_format::rgba:\r
  88         case core::pixel_format::abgr:\r
  89                 {\r
  90                         desc.planes.push_back(core::pixel_format_desc::plane(dummy_pict.linesize[0]/4, height, 4));                                             \r
  91                         return desc;\r
  92                 }\r
  93         case core::pixel_format::ycbcr:\r
  94         case core::pixel_format::ycbcra:\r
  95                 {               \r
  96                         // Find chroma height\r
  97                         size_t size2 = dummy_pict.data[2] - dummy_pict.data[1];\r
  98                         size_t h2 = size2/dummy_pict.linesize[1];                       \r
  99 \r
 100                         desc.planes.push_back(core::pixel_format_desc::plane(dummy_pict.linesize[0], height, 1));\r
 101                         desc.planes.push_back(core::pixel_format_desc::plane(dummy_pict.linesize[1], h2, 1));\r
 102                         desc.planes.push_back(core::pixel_format_desc::plane(dummy_pict.linesize[2], h2, 1));\r
 103 \r
 104                         if(desc.pix_fmt == core::pixel_format::ycbcra)                                          \r
 105                                 desc.planes.push_back(core::pixel_format_desc::plane(dummy_pict.linesize[3], height, 1));       \r
 106                         return desc;\r
 107                 }               \r
 108         default:                \r
 109                 desc.pix_fmt = core::pixel_format::invalid;\r
 110                 return desc;\r
 111         }\r
 112 }\r
 113 \r
 114 struct video_decoder::implementation : boost::noncopyable\r
 115 {       \r
 116         std::shared_ptr<core::frame_factory> frame_factory_;\r
 117         std::shared_ptr<SwsContext> sws_context_;\r
 118 \r
 119         AVCodecContext* codec_context_;\r
 120 \r
 121         const int width_;\r
 122         const int height_;\r
 123         const PixelFormat pix_fmt_;\r
 124         core::pixel_format_desc desc_;\r
 125 \r
 126 public:\r
 127         explicit implementation(AVCodecContext* codec_context, const safe_ptr<core::frame_factory>& frame_factory) \r
 128                 : frame_factory_(frame_factory)\r
 129                 , codec_context_(codec_context)\r
 130                 , width_(codec_context_->width)\r
 131                 , height_(codec_context_->height)\r
 132                 , pix_fmt_(codec_context_->pix_fmt)\r
 133                 , desc_(get_pixel_format_desc(pix_fmt_, width_, height_))\r
 134         {\r
 135                 if(desc_.pix_fmt == core::pixel_format::invalid)\r
 136                 {\r
 137                         CASPAR_LOG(warning) << "Hardware accelerated color transform not supported.";\r
 138 \r
 139                         desc_ = get_pixel_format_desc(PIX_FMT_BGRA, width_, height_);\r
 140                         double param;\r
 141                         sws_context_.reset(sws_getContext(width_, height_, pix_fmt_, width_, height_, PIX_FMT_BGRA, SWS_BILINEAR, nullptr, nullptr, &param), sws_freeContext);\r
 142                         if(!sws_context_)\r
 143                                 BOOST_THROW_EXCEPTION(operation_failed() <<\r
 144                                                                           msg_info("Could not create software scaling context.") << \r
 145                                                                           boost::errinfo_api_function("sws_getContext"));\r
 146                 }\r
 147         }\r
 148         \r
 149         safe_ptr<core::write_frame> execute(void* tag, const aligned_buffer& video_packet)\r
 150         {                               \r
 151                 safe_ptr<AVFrame> decoded_frame(avcodec_alloc_frame(), av_free);\r
 152 \r
 153                 int frame_finished = 0;\r
 154                 const int result = avcodec_decode_video(codec_context_, decoded_frame.get(), &frame_finished, video_packet.data(), video_packet.size());\r
 155                 \r
 156                 if(result < 0)\r
 157                         BOOST_THROW_EXCEPTION(invalid_operation() << msg_info("avcodec_decode_video failed"));\r
 158                 \r
 159                 auto write = frame_factory_->create_frame(tag, desc_);\r
 160                 if(sws_context_ == nullptr)\r
 161                 {\r
 162                         tbb::parallel_for(0, static_cast<int>(desc_.planes.size()), 1, [&](int n)\r
 163                         {\r
 164                                 auto plane            = desc_.planes[n];\r
 165                                 auto result           = write->image_data(n).begin();\r
 166                                 auto decoded          = decoded_frame->data[n];\r
 167                                 auto decoded_linesize = decoded_frame->linesize[n];\r
 168                                 \r
 169                                 // Copy line by line since ffmpeg sometimes pads each line.\r
 170                                 tbb::parallel_for(0, static_cast<int>(desc_.planes[n].height), 1, [&](int y)\r
 171                                 {\r
 172                                         fast_memcpy(result + y*plane.linesize, decoded + y*decoded_linesize, plane.linesize);\r
 173                                 });\r
 174                         });\r
 175                 }\r
 176                 else\r
 177                 {\r
 178                         // Uses sws_scale when we don't support the provided color-space.\r
 179                         safe_ptr<AVFrame> av_frame(avcodec_alloc_frame(), av_free);     \r
 180                         avcodec_get_frame_defaults(av_frame.get());                     \r
 181                         avpicture_fill(reinterpret_cast<AVPicture*>(av_frame.get()), write->image_data().begin(), PIX_FMT_BGRA, width_, height_);\r
 182                  \r
 183                         sws_scale(sws_context_.get(), decoded_frame->data, decoded_frame->linesize, 0, height_, av_frame->data, av_frame->linesize);    \r
 184                 }       \r
 185 \r
 186                 // DVVIDEO is in lower field. Make it upper field if needed.\r
 187                 if(codec_context_->codec_id == CODEC_ID_DVVIDEO && frame_factory_->get_video_format_desc().mode == core::video_mode::upper)\r
 188                         write->get_image_transform().set_fill_translation(0.0f, 1.0/static_cast<double>(height_));\r
 189 \r
 190                 return write;\r
 191         }\r
 192 };\r
 193 \r
 194 video_decoder::video_decoder(AVCodecContext* codec_context, const safe_ptr<core::frame_factory>& frame_factory) : impl_(new implementation(codec_context, frame_factory)){}\r
 195 safe_ptr<core::write_frame> video_decoder::execute(void* tag, const aligned_buffer& video_packet){return impl_->execute(tag, video_packet);}\r
 196 \r
 197 }