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

   1 #include "../../stdafx.h"\r
   2 \r
   3 #include "filter.h"\r
   4 \r
   5 #include "parallel_yadif.h"\r
   6 \r
   7 #include "../../ffmpeg_error.h"\r
   8 \r
   9 #include <boost/assign.hpp>\r
  10 \r
  11 #include <cstdio>\r
  12 #include <sstream>\r
  13 \r
  14 #if defined(_MSC_VER)\r
  15 #pragma warning (push)\r
  16 #pragma warning (disable : 4244)\r
  17 #endif\r
  18 extern "C" \r
  19 {\r
  20         #include <libavutil/avutil.h>\r
  21         #include <libavutil/imgutils.h>\r
  22         #include <libavfilter/avfilter.h>\r
  23         #include <libavfilter/avcodec.h>\r
  24         #include <libavfilter/avfiltergraph.h>\r
  25         #include <libavfilter/vsink_buffer.h>\r
  26         #include <libavfilter/vsrc_buffer.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 PixelFormat pix_fmts[] = \r
  35 {\r
  36         PIX_FMT_YUV420P,\r
  37         PIX_FMT_YUVA420P,\r
  38         PIX_FMT_YUV422P,\r
  39         PIX_FMT_YUV444P,\r
  40         PIX_FMT_YUV411P,\r
  41         PIX_FMT_ARGB, \r
  42         PIX_FMT_RGBA,\r
  43         PIX_FMT_ABGR,\r
  44         PIX_FMT_GRAY8,\r
  45         PIX_FMT_NONE\r
  46 };      \r
  47 \r
  48 struct filter::implementation\r
  49 {\r
  50         std::string                                             filters_;\r
  51         std::shared_ptr<AVFilterGraph>  graph_; \r
  52         AVFilterContext*                                buffersink_ctx_;\r
  53         AVFilterContext*                                buffersrc_ctx_;\r
  54         std::shared_ptr<void>                   parallel_yadif_ctx_;\r
  55                 \r
  56         implementation(const std::wstring& filters) \r
  57                 : filters_(narrow(filters))\r
  58                 , parallel_yadif_ctx_(nullptr)\r
  59         {\r
  60                 std::transform(filters_.begin(), filters_.end(), filters_.begin(), ::tolower);\r
  61         }\r
  62         \r
  63         std::vector<safe_ptr<AVFrame>> execute(const std::shared_ptr<AVFrame>& frame)\r
  64         {\r
  65                 if(!frame)\r
  66                         return std::vector<safe_ptr<AVFrame>>();\r
  67 \r
  68                 if(filters_.empty())\r
  69                         return boost::assign::list_of(frame);\r
  70 \r
  71                 push(frame);\r
  72                 return poll();\r
  73         }\r
  74 \r
  75         void push(const std::shared_ptr<AVFrame>& frame)\r
  76         {               \r
  77                 if(!graph_)\r
  78                 {\r
  79                         graph_.reset(avfilter_graph_alloc(), [](AVFilterGraph* p){avfilter_graph_free(&p);});\r
  80                                                                 \r
  81                         // Input\r
  82                         std::stringstream args;\r
  83                         args << frame->width << ":" << frame->height << ":" << frame->format << ":" << 0 << ":" << 0 << ":" << 0 << ":" << 0; // don't care about pts and aspect_ratio\r
  84                         THROW_ON_ERROR2(avfilter_graph_create_filter(&buffersrc_ctx_, avfilter_get_by_name("buffer"), "src", args.str().c_str(), NULL, graph_.get()), "[filter]");\r
  85 \r
  86                         // OPIX_FMT_BGRAutput\r
  87                         THROW_ON_ERROR2(avfilter_graph_create_filter(&buffersink_ctx_, avfilter_get_by_name("buffersink"), "out", NULL, pix_fmts, graph_.get()), "[filter]");\r
  88                         \r
  89                         AVFilterInOut* outputs = avfilter_inout_alloc();\r
  90                         AVFilterInOut* inputs  = avfilter_inout_alloc();\r
  91                         \r
  92                         outputs->name                   = av_strdup("in");\r
  93                         outputs->filter_ctx             = buffersrc_ctx_;\r
  94                         outputs->pad_idx                = 0;\r
  95                         outputs->next                   = NULL;\r
  96 \r
  97                         inputs->name                    = av_strdup("out");\r
  98                         inputs->filter_ctx              = buffersink_ctx_;\r
  99                         inputs->pad_idx                 = 0;\r
 100                         inputs->next                    = NULL;\r
 101                         \r
 102                         THROW_ON_ERROR2(avfilter_graph_parse(graph_.get(), filters_.c_str(), &inputs, &outputs, NULL), "[filter]");\r
 103                         \r
 104                         avfilter_inout_free(&inputs);\r
 105                         avfilter_inout_free(&outputs);\r
 106 \r
 107                         THROW_ON_ERROR2(avfilter_graph_config(graph_.get(), NULL), "[filter]");                 \r
 108 \r
 109                         for(size_t n = 0; n < graph_->filter_count; ++n)\r
 110                         {\r
 111                                 auto filter_name = graph_->filters[n]->name;\r
 112                                 if(strstr(filter_name, "yadif") != 0)\r
 113                                         parallel_yadif_ctx_ = make_parallel_yadif(graph_->filters[n]);\r
 114                         }\r
 115                 }\r
 116         \r
 117                 THROW_ON_ERROR2(av_vsrc_buffer_add_frame(buffersrc_ctx_, frame.get(), 0), "[filter]");\r
 118         }\r
 119 \r
 120         std::vector<safe_ptr<AVFrame>> poll()\r
 121         {\r
 122                 std::vector<safe_ptr<AVFrame>> result;\r
 123 \r
 124                 if(!graph_)\r
 125                         return result;\r
 126                 \r
 127                 while (avfilter_poll_frame(buffersink_ctx_->inputs[0])) \r
 128                 {\r
 129                         AVFilterBufferRef *picref;\r
 130                         THROW_ON_ERROR2(av_vsink_buffer_get_video_buffer_ref(buffersink_ctx_, &picref, 0), "[filter]");\r
 131 \r
 132             if (picref) \r
 133                         {               \r
 134                                 safe_ptr<AVFrame> frame(avcodec_alloc_frame(), [=](AVFrame* p)\r
 135                                 {\r
 136                                         av_free(p);\r
 137                                         avfilter_unref_buffer(picref);\r
 138                                 });\r
 139 \r
 140                                 avcodec_get_frame_defaults(frame.get());        \r
 141 \r
 142                                 memcpy(frame->data,     picref->data,     sizeof(frame->data));\r
 143                                 memcpy(frame->linesize, picref->linesize, sizeof(frame->linesize));\r
 144                                 frame->format                           = picref->format;\r
 145                                 frame->width                            = picref->video->w;\r
 146                                 frame->height                           = picref->video->h;\r
 147                                 frame->pkt_pos                          = picref->pos;\r
 148                                 frame->interlaced_frame         = picref->video->interlaced;\r
 149                                 frame->top_field_first          = picref->video->top_field_first;\r
 150                                 frame->key_frame                        = picref->video->key_frame;\r
 151                                 frame->pict_type                        = picref->video->pict_type;\r
 152                                 frame->sample_aspect_ratio      = picref->video->sample_aspect_ratio;\r
 153 \r
 154                                 result.push_back(frame);\r
 155             }\r
 156         }\r
 157 \r
 158                 return result;\r
 159         }\r
 160 };\r
 161 \r
 162 filter::filter(const std::wstring& filters) : impl_(new implementation(filters)){}\r
 163 filter::filter(filter&& other) : impl_(std::move(other.impl_)){}\r
 164 filter& filter::operator=(filter&& other){impl_ = std::move(other.impl_); return *this;}\r
 165 std::vector<safe_ptr<AVFrame>> filter::execute(const std::shared_ptr<AVFrame>& frame) {return impl_->execute(frame);}\r
 166 }