git.sesse.net Git - casparcg/blob - modules/ffmpeg/producer/video/video_decoder.cpp

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